JP6007247B2 - Combustion gas processing equipment - Google Patents

Description

  The present invention relates to a combustion gas processing apparatus, and more particularly to a combustion gas processing apparatus useful for detoxifying a combustion gas discharged from an incinerator or the like.

The combustion gas discharged from an incinerator or the like contains harmful substances and odorous substances. In general, the following treatments (i) to (iv) are performed on the combustion gas discharged from an incinerator or the like.
(I) The combustion gas discharged from an incinerator or the like is subjected to a magnetic heat treatment (treatment of heating the gas to a temperature of 400 ° C. to 600 ° C. in a combustion tank using magnetism such as radium and neodymium).
(Ii) A secondary heat treatment (treatment using kerosene or heavy oil to heat the gas to a temperature of 800 ° C. to 900 ° C. to burn dioxins) is performed on the combustion gas that has been subjected to the magnetic heat treatment.
(Iii) The incinerated ash generated by the magnetic heat treatment is subjected to an ash melting process (a process in which the incinerated ash is heated to a temperature of 1400 to 1600 ° C. to melt the ash in a melting furnace). Then, the generated sludge is discharged, and the generated gas is subjected to the secondary heat treatment (ii).
(Iv) A cooling process (for example, a process of rapidly cooling the gas to a temperature of 80 ° C.) is performed on the combustion gas that has been subjected to the secondary heat treatment. By this cooling treatment, harmful substances such as heavy metals such as mercury and radioactive substances such as cesium are changed from a gas state to a solid state (such as dust).
Conventionally, bag filters and electrostatic precipitators have been used to remove harmful substances and malodorous substances from the combustion gas after cooling treatment. However, the bag filter has a problem in that it is necessary to replace the filter every time a predetermined amount of combustion gas is processed, and there is a possibility that it may be ignited by the combustion gas. In addition, the electric dust collector has a problem in that it is necessary to remove dust from the apparatus every time a predetermined amount of combustion gas is processed.
In view of the above problems, it has been studied to use a scrubber device that does not require filter replacement or device dust removal (for example, Patent Document 1). In this scrubber device, it is possible to remove harmful substances and malodorous substances from the combustion gas by bringing the combustion gas into contact with the treatment liquid.

JP-A-8-318125

However, according to the scrubber device described in Patent Document 1, although harmful substances and malodorous substances can be removed from the combustion gas to some extent, it is not always sufficient in terms of the collection rate of harmful substances and malodorous substances.
An object of this invention is to provide the combustion gas processing apparatus which can fully remove a harmful substance and a malodorous substance from combustion gas.

The combustion gas processing apparatus of the present invention includes a first processor that performs at least a desalting process on a combustion gas containing a hazardous substance, and a second process that performs at least a deodorizing process on the primary processing gas processed by the first processor. A first blower providing a pressure difference so that the downstream pressure is smaller than the upstream pressure in the first processor, and the downstream pressure is smaller than the upstream pressure in the second processor. A second blower for providing a pressure difference, wherein the first processor includes a gas-liquid contact chamber and a first gas processing chamber, and the combustion gas for introducing the combustion gas into the gas-liquid contact chamber An introduction part, a spray nozzle for bringing the first treatment liquid into contact with the combustion gas in the form of a mist or a droplet, and a gas-liquid mixture comprising the combustion gas and the first treatment liquid are guided to the first gas treatment chamber. And a first gas treatment section. The chamber circulates in the first processing liquid storage section in which the first processing liquid is stored, a gas-liquid mixture introduction section for introducing the gas-liquid mixture into the first processing liquid, and the first processing liquid. A primary processing gas discharge unit for discharging the primary processing gas, wherein the second processing machine includes a second gas processing chamber, and the second gas processing chamber stores a second processing liquid. A secondary processing liquid storage unit, a primary processing gas introduction unit for introducing the primary processing gas into the second processing liquid, and a secondary processing gas discharge unit for discharging the secondary processing gas flowing through the second processing liquid And is provided.

  According to the present invention, harmful substances and malodorous substances can be sufficiently removed from the combustion gas as described below. That is, the combustion gas is introduced into the first processor of the combustion gas processing apparatus. In the gas-liquid contact chamber of the first processor, the combustion gas is brought into contact with and mixed with the first process liquid by a gas-liquid contact member provided in the gas-liquid contact chamber. And the gas-liquid mixture which consists of combustion gas and a 1st process liquid is introduce | transduced into the 1st gas process chamber of a 1st processor through a guide part. In the first gas processing chamber of the first processing machine, a gas-liquid mixture composed of combustion gas and first processing liquid is introduced into a first processing liquid storage section in which the first processing liquid is stored. In the first gas processing chamber, a pressure difference is generated by the action of the first blower so that the downstream pressure becomes smaller than the upstream pressure. For this reason, the combustion gas in the gas-liquid mixture introduced into the first processing liquid flows through the first processing liquid. Here, the harmful substances and the like in the combustion gas can be dissolved in the first treatment liquid by the contact between the combustion gas and the first treatment liquid, thereby removing the harmful substances and the like from the combustion gas. The primary processing gas that has circulated in the first processing liquid in the first processing liquid storage unit is introduced into the second processing machine via the primary processing gas discharge unit. In the second gas processing chamber of the second processing machine, the primary processing gas is introduced into the second processing liquid storage unit in which the second processing liquid is stored. In the second gas processing chamber, a pressure difference is generated by the action of the second blower so that the downstream pressure becomes smaller than the upstream pressure. Therefore, the primary processing gas introduced into the second processing liquid flows through the second processing liquid. Here, the malodorous substance and the like in the primary treatment gas can be removed from the primary treatment gas by dissolving the malodorous substance and the like in the primary treatment gas into the second treatment liquid by contact between the primary treatment gas and the second treatment liquid. The secondary processing gas that has circulated in the second processing liquid in the second processing liquid storage unit is discharged from the secondary processing gas discharge unit. As described above, harmful substances and malodorous substances can be sufficiently removed from the combustion gas.

  In the combustion gas processing apparatus of the present invention, the first processing liquid storage section includes a baffle plate that obstructs the movement of the combustion gas in the first processing liquid, and the combustion gas in the first processing liquid. It is preferable that at least one of the multi-hole plates that can circulate the holes is provided.

  According to the present invention, the movement distance of the combustion gas in the first processing liquid is increased due to the presence of the baffle plate and the multi-hole plate. Therefore, more contact between the combustion gas and the first treatment liquid can be achieved. And more harmful substances in the combustion gas can be dissolved in the first treatment liquid.

  In the combustion gas processing apparatus of the present invention, the second processing liquid storage section includes a baffle plate that obstructs the movement of the primary processing gas in the second processing liquid, and the primary in the second processing liquid. It is preferable that at least one of multi-hole plates through which the processing gas can flow through the holes is provided.

  According to the present invention, due to the presence of the baffle plate and the multi-hole plate, the moving distance of the primary processing gas in the second processing liquid becomes long. Therefore, more contact between the primary processing gas and the second processing liquid can be achieved. And more malodorous substances in the primary processing gas can be dissolved in the second processing liquid.

  In the combustion gas processing apparatus of the present invention, in the second processing liquid storage unit, an ultrasonic vibrator that vibrates the second processing liquid in order to promote contact between the primary processing gas and the second processing liquid. Is preferably provided.

  According to this invention, the contact between the primary processing gas and the second processing liquid can be promoted by the vibration of the ultrasonic vibrator. And more malodorous substances in the primary processing gas can be dissolved in the second processing liquid.

In the combustion gas processing apparatus of the present invention, it is preferable that the guide portion in the first processing machine has a cylindrical shape that is narrowed downward from above.
As described above, since the guide portion has a narrow cylindrical shape, the flow rate of the gas-liquid mixture can be increased and guided to the first gas processing chamber. Therefore, the contact between the combustion gas and the first processing liquid in the first gas processing chamber can be promoted. In addition, the time required for the first processing liquid to flow down becomes longer. And a 1st process liquid and combustion gas can be made to contact longer.

  In the combustion gas processing apparatus of the present invention, the first processing machine further includes a first processing liquid adjustment chamber communicating with the first gas processing chamber, and the first processing liquid adjustment chamber includes the first gas. A first discharge part for discharging a part of the first processing liquid discharged from the processing chamber; a first detection member for detecting a component of the first processing liquid in the first processing liquid adjustment chamber; It is preferable that a first chemical material charging unit for adjusting the components is provided.

  According to this invention, the used first treatment liquid can be regenerated by adjusting the components of the first treatment liquid in the first treatment liquid adjustment chamber. And the 1st processing liquid can be circulated in the above-mentioned channel by sending the regenerated 1st processing liquid to a gas-liquid contact member. In addition, when the first detection member detects a component of the first treatment liquid in the first treatment liquid adjustment chamber, and the component of the first treatment liquid satisfies a predetermined condition, a part of the first treatment liquid Can also be discharged from the first outlet.

  In the combustion gas processing apparatus of the present invention, the first processing liquid storage section includes a supernatant discharge section that discharges the supernatant liquid of the first processing liquid, and a communication section that communicates with the first processing liquid adjustment chamber. It is preferable that a sediment discharge unit for discharging the precipitate of the first treatment liquid is provided.

  According to this invention, the supernatant liquid of the first processing liquid can be discharged from the supernatant discharge part. Therefore, dust contained in the supernatant liquid can be removed from the first processing liquid. Moreover, the deposit of a 1st process liquid can be discharged | emitted from a deposit discharge part. Therefore, the precipitate can be removed from the first treatment liquid. The supernatant and the precipitate are sent to an existing heavy metal separation and solidification device, radioactive material solidification device and the like which are provided separately as necessary.

It is a mimetic diagram showing a combustion gas processing device concerning one embodiment of the present invention. It is sectional drawing seen from the front which shows the 1st processor in the said embodiment. It is a top view which shows the 1st processing machine in the said embodiment. It is an expansion perspective view which shows the vicinity of the gas-liquid mixture introduction part of the 1st processing machine in the said embodiment. It is sectional drawing seen from the front which shows the 2nd processing machine in the said embodiment. It is a top view which shows the 2nd processing machine in the said embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
(1) Whole structure of combustion gas processing apparatus 1 First, the whole structure of the combustion gas processing apparatus 1 is demonstrated based on FIG. FIG. 1 is a schematic view showing a combustion gas processing apparatus according to an embodiment of the present invention.
As shown in FIG. 1, the combustion gas processing apparatus 1 includes at least a deodorizing treatment for the first treatment machine 2 that performs at least a desalination treatment on a combustion gas containing a harmful substance, and a primary treatment gas that is treated by the first treatment machine 2. A second processor 3 that performs processing, a first blower 41 that provides a pressure difference in the first processor 2 so that the downstream pressure is smaller than the upstream pressure, and an upstream pressure in the second processor 3. The second blower 42 is provided with a pressure difference so as to reduce the downstream pressure, the filter device 5 that distributes the secondary processing gas processed by the second processor 3, and the secondary that distributes the filter device 5. A chimney 6 for discharging the processing gas to the outside.
Further, the combustion gas processing apparatus 1 is provided with gas pipes 71, 72, 73, 74, 75, 76 for circulating gas. And gas piping 71,72,73,74,75,76 is an incinerator etc. (not shown), the 1st blower 41, the 1st processor 2, and the 2nd processor as shown in FIG. 3, the second blower 42, the filter device 5, and the chimney 6 are connected.

(2) First processor 2
As shown in FIGS. 2 and 3, the first processing machine 2 includes a gas-liquid contact chamber 21, a first gas processing chamber 22, and a first processing liquid adjustment chamber 23.
Further, the first processing machine 2 is provided with liquid pipes 24A, 24B, and 25 for circulating the liquid. And as shown in FIG. 1, liquid piping 24A, 24B has connected the 1st gas processing chamber 22 and external equipment (not shown). Further, as shown in FIG. 1, the liquid pipe 25 connects the gas-liquid contact chamber 21 and the first processing liquid adjustment chamber 23.

As shown in FIGS. 2 and 3, the gas-liquid contact chamber 21 includes a combustion gas introduction part 211 for introducing combustion gas, a gas-liquid contact member 212 for bringing the first processing liquid into contact with the combustion gas, combustion gas and A guide portion 213 for guiding the gas-liquid mixture made of the first processing liquid to the first gas processing chamber 22 is provided.
Examples of the gas-liquid contact member 212 include a spray nozzle. The gas-liquid contact member 212 includes a plurality of spray nozzles. Moreover, the gas-liquid contact member 212 is connected to the adjustment liquid delivery part 234 of the 1st process liquid adjustment chamber 23 via the liquid piping 25, as shown in FIGS.
The guide portion 213 has a cylindrical shape that is narrowed downward from above. Thereby, as shown in FIG. 2, the guide portion 213 has a double-structured water jacket shape, and the guide portion 213 can cool the combustion gas. Then, by cooling the combustion gas, harmful substances in the combustion gas can be deposited and removed easily.
Although it does not specifically limit as combustion gas, Acid gas containing carbon (C), hydrogen (H), sulfur (S), chlorine (Cl), etc. is mentioned. The combustion gas is preferably cooled to a low temperature (80 ° C.) before being introduced into the first processor 2 using, for example, a cooling device (not shown).
The first treatment liquid is not particularly limited, but an alkaline liquid can be used when the combustion gas is acidic. As this 1st process liquid, the water containing alkaline substances, such as sodium hydroxide (NaOH), is mentioned. Further, this first treatment liquid, if necessary, zeolite, ozone (O ₃₎ or the like may be added.

As shown in FIGS. 2 and 3, the first gas processing chamber 22 introduces the first processing liquid storage unit 221 storing the first processing liquid and the gas-liquid mixture into the first processing liquid. A gas-liquid mixture introduction unit 222 that performs the above-described process and a primary processing gas discharge unit 223 that discharges the primary processing gas that has circulated through the first processing liquid are provided.
As shown in FIGS. 2 to 4, the first processing liquid storage unit 221 is provided with a baffle plate 224 and a multi-hole plate 225.
The baffle plate 224 is disposed in the first processing liquid stored in the first processing liquid storage unit 221 and can obstruct the movement of the combustion gas in the first processing liquid. Thereby, contact with the combustion gas and the first treatment liquid can be promoted. Further, as shown in FIG. 4, the baffle plate 224 has a triangular wave shape at the outer edge. Thereby, contact with the combustion gas and the first treatment liquid can be further promoted.
The multi-hole plate 225 is disposed in the first processing liquid stored in the first processing liquid storage unit 221 so that the combustion gas in the first processing liquid can flow through the hole 225A. . Thereby, the combustion gas becomes finer bubbles, and the contact between the combustion gas and the first treatment liquid can be promoted. The hole 225A has a circular shape, for example, as shown in FIG.

Further, as shown in FIG. 2, the first treatment liquid storage part is provided with a supernatant discharge part 226, a communication part 227, and a precipitate discharge part 228 for discharging the precipitate of the first process liquid. ing.
The supernatant discharge part 226 is disposed in the vicinity of the liquid surface of the first processing liquid, and discharges the supernatant liquid of the first processing liquid through the liquid pipe 24A by overflowing from the first processing liquid storage part. it can. The dust contained in the supernatant of the first treatment liquid is dust having a specific gravity of less than 1 g / cm ³ , and specifically includes cesium hydroxide.
The communication part 227 is disposed below the liquid level of the first processing liquid and communicates with the first processing liquid adjustment chamber 23. Then, the first processing liquid can be introduced into the first processing liquid adjustment chamber 23 via the communication portion 227. A pilot plate 227A is provided on the upper side of the communication portion 227.
The sediment discharge unit 228 is disposed below the first treatment liquid storage unit 221. In addition, a precipitate guide member 229 for guiding the precipitate of the first processing liquid to the precipitate discharger 228 is provided above the precipitate discharger 228. In addition, the sediment guide member 229 is composed of a plurality of inclined plates arranged alternately at a predetermined interval, and these inclined plates can prevent the sediment that has fallen once from rising, so that the precipitate from the liquid can be prevented. Can be separated better. Then, the precipitate of the first treatment liquid is deposited below the first treatment liquid storage unit 221, guided by the precipitate guide member 229, and collected in the precipitate discharge unit 228. And the deposit of said 1st process liquid can be discharged | emitted via liquid piping 24B.
The precipitate of the first treatment liquid is dust having a specific gravity of more than 1 g / cm ³ , and specific examples thereof include heavy metal salts.
As shown in FIGS. 1 and 2, the supernatant and precipitate of the first treatment liquid are sent to external equipment (not shown) via the liquid pipes 24A and 24B. Control valves 241A and 241B are provided in the liquid pipes 24A and 24B. Here, examples of the external equipment include a heavy metal separation and solidification device and a radioactive substance solidification device.

As shown in FIGS. 2 and 3, the first treatment liquid adjustment chamber 23 includes a first discharge portion 231 that discharges a part of the first treatment liquid discharged from the first gas treatment chamber 22, and a first treatment liquid. First detection members 232A and 232B for detecting the components of the first processing liquid in the adjustment chamber 23, first chemical material input portions 233A and 233B for adjusting the components of the first processing liquid, and the adjusted first An adjustment liquid delivery unit 234 for delivering the treatment liquid is provided.
The first detection members 232A and 232B are arranged in two places (in the vicinity of the first discharge part 231 and the adjustment liquid delivery part 234, respectively), and parameters in the vicinity of the first discharge part 231 and the adjustment liquid delivery part 234, respectively. It can be measured. Examples of the first detection members 232A and 232B include a pH meter and a thermometer. In the present embodiment, the first detection member 232A is a pH meter, and the first detection member 232B is also a pH meter.
The first drug material feeding section 233A, a first drug material to be introduced at 233B, for example, sodium hydroxide (NaOH), cooling water, zeolite, and an ozone _{(O 3).} In addition, it is preferable to determine the position of 1st chemical | medical material injection | throwing-in part 233A, 233B according to the kind (specific gravity) of said 1st chemical | medical material. For example, in the first chemical material charging unit 233A located above the liquid level of the first processing liquid, it is preferable to input a liquid or solid such as sodium hydroxide (NaOH), cooling water, or zeolite. Further, the first drug material feeding section 233B located below the liquid level of the first processing solution, it is preferable to introduce the gas such as ozone (O _3).
The adjustment liquid delivery unit 234 is connected to the gas-liquid contact member 212 via the liquid pipe 25. A control valve 251 is provided in the liquid pipe 25.

(3) Second processor 3
As shown in FIGS. 5 and 6, the second processing machine 3 includes a second gas processing chamber 31. The 2nd processor 3 is arrange | positioned downstream from the 1st processor 2, as shown in FIG.
Further, the second processing machine 3 is provided with a liquid pipe 32 for circulating a liquid. The liquid pipe 32 connects the front part and the rear part of the second gas processing chamber 31.

As shown in FIGS. 5 and 6, the second gas processing chamber 31 introduces the second processing liquid storage unit 311 storing the second processing liquid and the primary processing gas into the second processing liquid. A primary processing gas introduction unit 312 and a secondary processing gas discharge unit 313 that discharges the secondary processing gas that has circulated through the second processing liquid are provided.
The second treatment liquid is not particularly limited, but water or the like can be used. When the combustion gas is acidic, an alkaline liquid can be used. As the second treatment liquid, water containing an alkaline substance such as sodium hydroxide (NaOH) may be used. Further, this second treatment liquid, if necessary, ozone (O ₃₎ or the like may be added.

The second processing liquid storage unit 311 is provided with a baffle plate 314, a multi-hole plate 315, and an ultrasonic transducer 316.
The baffle plate 314 becomes narrower as the distance from the side wall of the second gas processing chamber 31 goes downward (the inclination angle of the baffle plate 314 is preferably 5 to 10 ° with respect to the vertical plane), and It arrange | positions so that it may be immersed in said 2nd process liquid accommodated in the 2nd process liquid storage part 311. FIG. Thereby, the flow velocity of the primary processing gas drawn into the foam in the second processing liquid can be increased, and the movement of the primary processing gas in the second processing liquid can be obstructed. Therefore, the contact between the primary processing gas and the second processing liquid can be promoted. Further, the tip folding portion 314A of the baffle plate 314 has a triangular wave shape. Thereby, contact with the primary processing gas and the second processing liquid can be further promoted.
The multi-hole plate 315 is disposed in the second processing liquid stored in the second processing liquid storage unit 311 so that the primary processing gas in the second processing liquid can flow through the holes. . Thereby, the primary processing gas becomes finer bubbles, and the contact between the primary processing gas and the second processing liquid can be promoted. Moreover, the shape of this hole (not shown) is, for example, an irregular shape such as a clover leaf shape or a circular shape. If the shape of the hole is a cloverleaf shape, the contact between the primary processing gas and the second processing liquid can be further promoted.
The ultrasonic vibrator 316 vibrates the second processing liquid in order to promote contact between the primary processing gas and the second processing liquid. Thereby, since the primary processing gas is circulated through the holes of the multi-hole plate 315, the primary processing gas becomes finer bubbles, and the contact between the primary processing gas and the second processing liquid is performed. Can be promoted.

  As shown in FIGS. 1 and 5, the liquid pipe 32 is provided with a control valve 321. The second processing liquid that has flowed out to the rear stage of the second gas processing chamber 31 is returned to the front stage of the second gas processing chamber 31 via the liquid pipe 32, so that the second processing liquid is processed in the second gas processing chamber 31. The liquid can be circulated.

(4) First blower 41 and second blower 42
As shown in FIG. 1, the first blower 41 is disposed in the vicinity of the upstream side of the first processor 2. The first blower 41 can provide a pressure difference in the first processor 2 so that the downstream pressure becomes smaller than the upstream pressure. If this pressure difference is utilized, combustion gas can distribute | circulate in said 1st process liquid.
As shown in FIG. 1, the second blower 42 is disposed in the vicinity of the downstream side of the second processor 3. The second blower 42 can provide a pressure difference in the second processing machine 3 so that the downstream pressure becomes smaller than the upstream pressure. By utilizing this pressure difference, the primary processing gas can flow through the second processing liquid.

(5) Filter device 5 and chimney 6
As shown in FIG. 1, the filter device 5 includes a first filter 51, a second filter 52, and manual valves 53 arranged upstream and downstream of the first filter 51 and the second filter 52, respectively. Yes. As shown in FIG. 1, the filter device 5 is arranged downstream of the second blower 42, and the first filter 51 and the second filter 52 are arranged so that the two systems are in parallel. The filter device 5 can more reliably remove dust in the secondary processing gas.
In the filter device 5, when one (first filter 51) is used, the upstream and downstream manual valves 53 of the other (second filter 52) are closed. And when exchanging one (first filter 51) used, the manual valve 53 upstream and downstream of the other (second filter 52) is opened, and the manual valve upstream and downstream of one (first filter 51) is opened. If 53 is closed, the other (second filter 52) can be used.
As shown in FIG. 1, the chimney 6 is disposed downstream of the filter device 5. From this chimney 6, the secondary processing gas which has circulated through the filter device 5 is released to the outside.

(6) Detoxification process of combustion gas by the combustion gas processing apparatus 1 Next, the detoxification process of the combustion gas by the combustion gas processing apparatus 1 having the above configuration will be described.
First, as a pretreatment step, the combustion gas from the incinerator is introduced into the combustion gas treatment device 1 after being cooled to a low temperature (80 ° C.) in advance by a cooling device or the like. The combustion gas is introduced into the first processor 2 of the combustion gas processing apparatus 1. In the gas-liquid contact chamber 21 of the first processor 2, the combustion gas is sprayed by a gas-liquid contact member 212 including a spray nozzle provided in the gas-liquid contact chamber 21. It is brought into contact with one processing liquid and mixed to form a gas-liquid mixture. The gas-liquid mixture is guided to the first gas processing chamber 22 by the guide unit 213 while increasing the flow velocity.

  The gas-liquid mixture is introduced into the first processing liquid stored in the first processing liquid storage unit 221 via the gas-liquid mixture introduction unit 222. In the first gas processing chamber 22, a pressure difference is generated by the action of the first blower 41 so that the downstream pressure becomes smaller than the upstream pressure. For this reason, the combustion gas in the gas-liquid mixture introduced into the first processing liquid flows through the first processing liquid. Here, toxic substances and the like in the combustion gas can be removed from the combustion gas by dissolving the toxic substances and the like in the combustion gas into the first treatment liquid by contact between the combustion gas and the first treatment liquid. The presence of the baffle plate 224 and the multi-hole plate 225 increases the moving distance of the combustion gas in the first processing liquid, and makes the combustion gas bubbles in the first processing liquid finer. In this way, harmful substances can be removed more sufficiently. In this manner, the primary processing gas that has circulated in the first processing liquid is discharged from the primary processing gas discharge unit 223.

In the first processing liquid storage part 221, the supernatant liquid of the first processing liquid can be discharged from the supernatant discharging part 226. Therefore, dust contained in the supernatant liquid can be removed from the first processing liquid. Moreover, the deposit of the 1st process liquid can be discharged | emitted from the deposit discharge part 228. FIG. Therefore, the precipitate can be removed from the first treatment liquid. Further, the first processing liquid from which the dust and sediment have been removed is introduced into the first processing liquid adjustment chamber 23 via the communication portion 227.
In addition, when debris containing a radioactive substance is burned in an incinerator, cesium which is one of the radioactive substances is contained in the dust contained in the supernatant liquid. Therefore, in such a case, this dust may be sent out to a radioactive substance solidifying device or the like.
In the first treatment liquid adjustment chamber 23, the used first treatment liquid can be regenerated by adjusting the components of the first treatment liquid. Then, the regenerated first processing liquid is sent out from the adjustment liquid sending unit 234 and is sent to the gas-liquid contact member 212 via the liquid pipe 25 as shown in FIGS. Can be circulated in the flow path described above. Moreover, when the pH of the 1st process liquid in the vicinity of the 1st discharge part 231 is detected with the 1st detection member 232A (pH meter), and the pH of this 1st process liquid is 6.5-7.5, for example. Can also discharge a part of the first treatment liquid from the first discharge part 231.

  On the other hand, the primary processing gas that has circulated through the first processing liquid in the first processing liquid storage unit 221 is introduced into the second processing machine 3 through the primary processing gas discharge unit 223. In the second gas processing chamber 31 of the second processing machine 3, the primary processing gas is introduced into the second processing liquid storage unit 311 in which the second processing liquid is stored. In the second gas processing chamber 31, a pressure difference is generated by the action of the second blower 42 so that the downstream pressure becomes smaller than the upstream pressure. Therefore, the primary processing gas introduced into the second processing liquid flows through the second processing liquid. Here, the malodorous substance and the like in the primary treatment gas can be removed from the primary treatment gas by dissolving the malodorous substance and the like in the primary treatment gas into the second treatment liquid by contact between the primary treatment gas and the second treatment liquid. In addition, since the baffle plate 314 is disposed so that the distance from the side wall of the second gas processing chamber 31 becomes narrower downward, the primary processing gas drawn into a bubble in the second processing liquid. The flow rate of can be increased. Therefore, the contact between the primary processing gas and the second processing liquid can be promoted. Further, due to the presence of the tip folding portion 314A and the multi-hole plate 315 of the baffle plate 314, the movement distance of the primary processing gas in the second processing liquid is increased, and the primary processing gas in the second processing liquid is increased. By making the foam of the finer, the odorous substance is more sufficiently removed. Further, the contact between the primary processing gas and the second processing liquid is promoted by the vibration of the ultrasonic vibrator 316. The secondary processing gas that has circulated through the second processing liquid in the second processing liquid storage unit 311 is discharged from the secondary processing gas discharge unit. As described above, harmful substances and malodorous substances can be sufficiently removed from the combustion gas.

  As described above, the detoxification process of the combustion gas by the combustion gas processing apparatus 1 is completed. In addition, the combustion gas processing apparatus 1 of said structure is applicable regardless of the magnitude | size of an incinerator, if the scale of an apparatus is changed. For example, by changing the scale of the apparatus, the present invention can be applied from a small incinerator having a waste disposal amount of, for example, 12 tons to a large incinerator having a waste treatment amount of, for example, 200 tons. .

(7) Effect of Embodiment According to the combustion gas processing apparatus 1 having the above-described configuration, the following effects can be achieved.

  According to the present embodiment, in the first processor 2, harmful substances in the combustion gas are dissolved in the first treatment liquid by contact between the combustion gas and the first treatment liquid, so that the harmful substances are removed from the combustion gas. Etc. can be removed. Further, in the second processing machine 3, by causing the primary processing gas that has circulated through the first processing liquid and the second processing liquid to come into contact with the second processing liquid, malodorous substances in the primary processing gas are dissolved in the second processing liquid. Malodorous substances and the like can be removed from the processing gas. In this way, harmful substances and malodorous substances can be sufficiently removed from the combustion gas.

  In the present embodiment, since the guide portion 213 has a cylindrical shape with a narrowed bottom, the flow rate of the gas-liquid mixture can be increased and guided to the first gas processing chamber. Therefore, the contact between the combustion gas and the first processing liquid in the first gas processing chamber 22 can be promoted. In addition, the time required for the first processing liquid to flow down becomes longer. And a 1st process liquid and combustion gas can be made to contact longer.

  According to the present embodiment, due to the presence of the baffle plate 224 and the multi-hole plate 225, the moving distance of the combustion gas in the first processing liquid becomes long. Therefore, more contact between the combustion gas and the first treatment liquid can be achieved. And more harmful substances in the combustion gas can be dissolved in the first treatment liquid.

  According to this embodiment, the supernatant liquid of the first processing liquid can be discharged from the supernatant discharge part 226. Therefore, dust contained in the supernatant liquid can be removed from the first processing liquid. Moreover, the deposit of the 1st process liquid can be discharged | emitted from the deposit discharge part 228. FIG. Therefore, the precipitate can be removed from the first treatment liquid.

  According to the present embodiment, the first processing liquid used can be regenerated by adjusting the components of the first processing liquid in the first processing liquid adjustment chamber 23. Then, by sending the regenerated first processing liquid to the gas-liquid contact member 212, the first processing liquid can be circulated in the above-described flow path. Further, the first detection member 232A detects the pH of the first treatment liquid in the first treatment liquid adjustment chamber 23. When the pH of the first treatment liquid is 6.5 to 7.5, for example, A part of the first treatment liquid can be discharged from the first discharge part.

  According to the present embodiment, due to the presence of the baffle plate 314 and the multi-hole plate 315, the moving distance of the primary processing gas in the second processing liquid becomes long. Therefore, more contact between the primary processing gas and the second processing liquid can be achieved. And more malodorous substances in the primary processing gas can be dissolved in the second processing liquid.

According to this embodiment, the contact between the primary processing gas and the second processing liquid can be promoted by the vibration of the ultrasonic vibrator 316. And more malodorous substances in the primary processing gas can be dissolved in the second processing liquid.
In addition, since ozone (O ₃ ) is introduced into the second treatment liquid, malodorous substances in the primary treatment gas can be more sufficiently removed.

(8) Modifications of Embodiments The present invention is not limited to the above-described embodiments, but includes modifications and improvements as long as the object of the present invention can be achieved.

In the said embodiment, although the shape of the hole of the multi-hole board 225,315 was made into circular shape and clover leaf shape, respectively, it is not limited to this. The shape of the holes of the multi-hole plates 225 and 315 may be an irregular shape such as a polygonal shape, a star shape, or a cross shape in addition to the circular shape and the clover leaf shape. Among these, a clover leaf shape, a star shape, a cross shape, and the like are preferable from the viewpoint of promoting contact between the gas and the treatment liquid.
In the said embodiment, although the 1st blower 41 was arrange | positioned in the vicinity of the upstream of the 1st processor 2, it is not limited to this. For example, the first blower 41 may be arranged in the vicinity of the downstream side of the first processor 2. Moreover, although the 2nd blower 42 has been arrange | positioned in the downstream vicinity of the 2nd processor 3, it is not limited to this. For example, the second blower 42 may be disposed in the vicinity of the second processor 3 upstream.
In the above embodiment, the combustion gas from the incinerator has been cooled to a low temperature (80 ° C.) in advance by the cooling device, but is not limited to this. And the temperature of the combustion gas introduced into the combustion gas processing apparatus 1 is not particularly limited. Further, the function of a cooling device may be added to the combustion gas processing device 1.
In the said embodiment, although the number of the 2nd processing machines 3 is one, it is not limited to this. For example, when the number of the second processing machines 3 is two or more, the gas processing amount can be increased. Further, when the number of the second processing machines 3 is two or more, the second blower 42 having a lower suction pressure can be used by reducing the gas processing amount per machine. When the suction pressure is lowered, the cost of the second blower 42 is remarkably lowered, so that the cost of the entire processing apparatus can be reduced.
In the said embodiment, although the 2nd processor 3 does not have a process liquid adjustment chamber, it is not limited to this. If necessary, the second processing unit 3 may also be provided with a processing liquid adjustment chamber.

  The combustion gas processing apparatus of the present invention can be used for detoxification processing of combustion gas discharged from an incinerator or the like.

DESCRIPTION OF SYMBOLS 1 ... Combustion gas processing apparatus, 2 ... 1st processing machine, 3 ... 2nd processing machine, 21 ... Gas-liquid contact chamber, 22 ... 1st gas processing chamber, 23 ... 1st processing liquid adjustment chamber, 31 ... 2nd gas Processing chamber 32 ... Second processing liquid adjustment chamber 41 ... First blower 42 ... Second blower 211 ... Combustion gas introduction part 212 ... Gas-liquid contact member 213 ... Guide part 221 ... First processing liquid storage 222, gas-liquid mixture introduction part, 223 ... primary processing gas discharge part, 224 ... baffle plate, 225 ... multi-hole plate, 226 ... supernatant discharge part, 227 ... communication part, 228 ... sediment discharge part, 231 ... 1st discharge part, 232A, 232B ... 1st detection member, 233A, 233B ... 1st chemical | medical material input part, 311 ... 2nd process liquid storage part, 312 ... Primary process gas introduction part, 313 ... Secondary process gas discharge part 314 ... baffle plate, 315 ... multi-hole plate, 316 ... ultrasonic transducer.

Claims (7)

A first processor that performs at least a desalting treatment on a combustion gas containing a harmful substance, a second processor that performs at least a deodorizing treatment on a primary processing gas that has been processed by the first processor, and the first processor. A first blower that provides a pressure difference so that the downstream pressure is smaller than the upstream pressure, and a second blower that provides a pressure difference so that the downstream pressure is smaller than the upstream pressure in the second processor, With
The first processing machine includes a gas-liquid contact chamber and a first gas processing chamber,
In the gas-liquid contact chamber, a combustion gas introduction part for introducing the combustion gas, a spray nozzle for bringing the first treatment liquid into contact with the combustion gas in the form of mist or droplets , the combustion gas and the first And a guide unit for guiding a gas-liquid mixture made of a processing liquid to the first gas processing chamber,
In the first gas processing chamber, a first processing liquid storage section storing the first processing liquid, a gas-liquid mixture introduction section for introducing the gas-liquid mixture into the first processing liquid, and the first A primary processing gas discharge unit for discharging the primary processing gas that has circulated in the processing liquid,
The second processing machine includes a second gas processing chamber,
In the second gas processing chamber, a second processing liquid storage section storing a second processing liquid, a primary processing gas introduction section for introducing the primary processing gas into the second processing liquid, and the second processing A combustion gas processing apparatus, comprising: a secondary processing gas discharge unit that discharges the secondary processing gas that has circulated in the liquid. The combustion gas processing apparatus according to claim 1,
The first treatment liquid storage unit includes a baffle plate that obstructs the movement of the combustion gas in the first treatment liquid, and a multi-hole plate that allows the combustion gas in the first treatment liquid to flow through holes. At least one of these is provided. The combustion gas processing apparatus characterized by the above-mentioned. The combustion gas processing apparatus according to claim 1 or 2,
The second processing liquid storage section includes a baffle plate that obstructs the movement of the primary processing gas in the second processing liquid, and a multi-hole plate through which the primary processing gas in the second processing liquid can circulate. At least one of them is provided. The combustion gas processing apparatus characterized by the above-mentioned. In the combustion gas processing apparatus according to any one of claims 1 to 3,
The second treatment liquid storage unit is provided with an ultrasonic transducer that vibrates the second treatment liquid in order to promote contact between the primary treatment gas and the second treatment liquid. Combustion gas processing device. In the combustion gas processing apparatus according to any one of claims 1 to 4,
The combustion gas processing apparatus according to claim 1, wherein the guide portion in the first processing machine has a cylindrical shape with a concavity downward from above. In the combustion gas processing apparatus according to any one of claims 1 to 5,
The first processing machine further includes a first processing liquid adjustment chamber communicating with the first gas processing chamber,
The first treatment liquid adjustment chamber includes a first discharge portion for discharging a part of the first treatment liquid discharged from the first gas treatment chamber, and a component of the first treatment liquid in the first treatment liquid adjustment chamber. The combustion gas processing apparatus characterized by the above-mentioned. The 1st detection member which detects this, and the 1st chemical | medical material injection | throwing-in part for adjusting the component of a 1st process liquid are provided. The combustion gas processing apparatus according to claim 6, wherein
The first treatment liquid storage part includes a supernatant discharge part for discharging the supernatant liquid of the first treatment liquid, a communication part communicating with the first treatment liquid adjustment chamber, and a precipitate of the first treatment liquid. A combustion gas processing apparatus, comprising: a sediment discharge section for discharging.