JP3676551B2 - Sludge dispersion introduction device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention is a sludge dispersion introducing device, more specifically, sewage sludge such as sewage sludge that has not been subjected to pretreatment such as drying and additive addition, from the lower part of the preheater to the kiln bottom of a dry cement kiln for cement raw material firing. about the sludge dispersion introduction device in the sludge treatment facility for burning is introduced between.
[0002]
[Prior art]
Sewage sludge discharged from sewage treatment plants has been used as fertilizer since ancient times, but the reason is that heavy metals are contained in sludge and that the amount of treatment is small when used as fertilizer. In recent years, land reclamation and ocean dumping have become mainstream.
However, sludge discharge from sewage treatment plants has been increasing in recent years, mainly in the Tokyo metropolitan area, and due to the lack of treatment plants for land reclamation and disposal at sea, as well as restrictions on preventing environmental pollution, At present, sludge treatment has shifted to incineration. Several types of sludge incineration facilities have already been proposed.
[0003]
However, in a conventional sludge incinerator using an incinerator, it is necessary to dry the sludge prior to incineration. In addition, the deodorized dry exhaust gas must be deodorized. Thereby, there existed a problem that drying cost, deodorizing cost, and incineration cost increased, and the processing cost as a whole became high.
A method using quick lime for drying sludge has also been proposed. In this method, quick lime is reacted with moisture contained in sludge to produce slaked lime, the residual moisture is evaporated by the reaction heat at that time, and the sludge is utilized as a dry material that can be pneumatically fed as a cement raw material. However, even this method has a problem that quick lime must be added during sludge drying.
[0004]
Therefore, as a prior art for solving such a problem, there is known a “sludge treatment method” disclosed in Japanese Patent Application Laid-Open No. 8-276199, which was previously filed by the applicant of the present patent application.
This is a sludge treatment technology in which water-containing sludge in a sludge tank is directly introduced into a kiln bottom or a preheater of a dry cement kiln and incinerated. According to this technology, water-containing sludge is poured directly into an existing dry cement kiln by a pump without performing any pretreatment to dry or add additives, and at the same time as normal production of cement clinker, It is possible to incinerate water-containing sludge.
[0005]
[Problems to be solved by the invention]
By the way, in this prior art, the water-containing sludge in the storage tank is thus fed into the kiln bottom of the dry cement kiln or the preheater by, for example, about 10% of the amount of cement clinker produced by the pump. Since it was only poured in, the introduced water-containing sludge often became sludge-like lumps.
As a result, the burning efficiency of the water-containing sludge is poor, it takes a relatively long time to sufficiently burn the water-containing sludge, and it is easy to form massive combustion ash, which is also useful as a cement component for the cement clinker in the kiln. There was a problem that combustion ash could not be evenly dispersed.
[0006]
OBJECT OF THE INVENTION
An object of the present invention is to provide a sludge dispersion introducing device that can increase the combustion efficiency of hydrous sludge and can disperse the combustion ash into the cement clinker relatively evenly. Another object of the present invention is to provide a sludge dispersion introducing device capable of effectively dispersing substantially all of the hydrated sludge to be introduced. Furthermore, an object of the present invention is to provide a sludge dispersion introducing device capable of finely breaking even a relatively hard water-containing sludge having a low water content and dispersing it into the kiln kiln bottom side. Still another object of the present invention is to provide a sludge dispersion introducing device that can disperse hydrous sludge in a relatively wide range. The object of the present invention is to provide a sludge dispersion introducing device that can disperse water-containing sludge well regardless of whether the sludge hardness is high or low.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention , one end is connected between a lower part of a preheater for cement raw material calcining and a kiln bottom of a dry cement kiln for cement raw material firing in a firing process of a cement manufacturing plant. A sludge introduction pipe for water-containing sludge, a pressure feed pump connected to the sludge introduction pipe and pumping the water-containing sludge to the sludge discharge side, and provided in the sludge introduction pipe. A sludge dispersion introducing device comprising a sludge dispersion means for dispersing water-containing sludge from a pipe end, wherein the sludge dispersion means arranges the sealed pipe end in one end portion of the sludge introduction pipe. A fixed inner pipe inserted into the introduction pipe with the pipe axis aligned, and a compressed air supply device for supplying compressed air to the fixed inner pipe; Through the formed air spout The compressed air from the compressed air supply device, by blowing from the inside of the radial direction of the sludge inlet pipe to the sludge inlet pipe, the water sludge is a sludge dispersion introducing device that ejects from the tube end of the sludge inlet pipe.
Examples of the water-containing sludge here include sewage sludge, activated sludge, and sludge.
Hydrous sludge may be supplied directly from a sludge treatment facility via a pipeline, etc., or transported by a truck equipped with a sealed tank, and once supplied to the sludge tank, it may be supplied from this sludge tank. .
[0008]
Although there is no restriction | limiting in particular in the addition amount of the water-containing sludge to a dry kiln, Usually, it determines suitably by various process conditions, such as the quality of a cement raw material, the usage-amount, and a calcination temperature. However, an amount that allows the water-containing sludge to be introduced into an existing dry kiln without particularly changing the operating conditions is preferable.
For example, when a dry kiln having a cement clinker production amount of 90 to 100 t / h is used, the amount of water-containing sludge added is less than 10.0 t / h, which is about 1/10 of the weight of the cement clinker produced (about 10%) It is preferable to add water-containing sludge in an amount of less than 10%. This is because when the amount of the water-containing sludge added to the cement clinker exceeds 10.0%, for example, the firing in the kiln becomes unstable due to moisture from the sludge, and the risk of adversely affecting the quality of the cement clinker increases.
[0009]
In addition, the space from the lower part of the preheater for cement raw material calcining to the bottom of the dry cement kiln for firing cement raw material (hereinafter sometimes referred to as the kiln bottom) is the lower part of the preheater. Not only the area and the kiln bottom area of the dry kiln, but a connecting part of both may be used. In addition, you may introduce | transduce a hydrous sludge into both the lower area | region of a pre-heater, and the kiln bottom area of a dry kiln.
The temperature of the introduction part of the hydrous sludge on the kiln kiln bottom side is 800 to 1000 ° C, preferably around 900 ° C. If it is less than 800 degreeC, combustion of a water-containing sludge tends to become inadequate. Moreover, when it exceeds 1000 degreeC, the malfunction which disturbs operation of a furnace will arise.
Further, the ejection pressure of the water-containing sludge is not particularly limited. However, 1 to 6 kgf / cm ² , particularly ² to 3 kgf / cm ² is preferable, and if it is less than 1 kgf / cm ² , the wind speed is weak and the dispersion of sludge becomes poor. Moreover, when a jet pressure exceeds 6 kgf / cm < ² >, sludge will be blown off strongly and the dispersion | distribution will worsen.
Furthermore, the dispersed water-containing sludge preferably has an average particle size of 5 to 25 mm .
[0010]
[0011]
[0012]
A well-known apparatus can be adopted as the compressed air supply apparatus .
[0013]
The diameter of the fixed inner pipe only needs to be large enough to supply compressed air enough to blow off the water-containing sludge that has reached the vicinity of the pipe end of the sludge introduction pipe to the air outlet.
[0014]
According to the second aspect of the present invention , one end is connected between the lower part of the preheater for cement raw material calcining and the kiln bottom of the dry cement kiln for cement raw material firing in the firing process of the cement manufacturing plant. A sludge introduction pipe for water-containing sludge, a pressure feed pump connected to the sludge introduction pipe and pumping the water-containing sludge to the sludge discharge side, and provided in the sludge introduction pipe. A sludge dispersion introducing device comprising a sludge dispersion means for dispersing hydrous sludge from the pipe end, wherein the sludge dispersion means arranges the opened pipe end in the vicinity of one end of the sludge introduction pipe, A flow inner pipe movably inserted in the sludge introduction pipe; a moving means for the flow inner pipe; and a compressed air supply device for supplying compressed air to the flow inner pipe. Inside Is moved in the sludge introduction pipe, the pipe end of the flow inner pipe is arranged in the vicinity of the tip of the water-containing sludge, and the compressed air from the compressed air supply device is blown outward from the pipe end of the flow inner pipe. Thus, the sludge dispersion introducing device ejects the water-containing sludge from the end of the sludge introduction pipe .
[0015]
The purpose of movement of the flow inner pipe is to move the pipe end of the flow inner pipe to a position where water-containing sludge can be dispersed most effectively. This is due to the fact that the hardness of the water-containing sludge varies depending on its water content. That is, as shown by a one-dot chain line or a two-dot chain line in FIG. 4, as the moisture content of the sludge increases, the shape of the sludge near the end of the sludge introduction pipe is likely to collapse. Therefore, depending on the moisture content at that time, the shape of the vicinity of the end of the sludge introduction pipe is different (the degree of sagging is different). The pipe end of the sludge introduction pipe is moved by the moving means from the tip to a position of several centimeters.
As the moving means, for example, a cylinder type moving mechanism using a hydraulic cylinder, an electric cylinder or the like as a driving source, a jack type moving mechanism using an electric jack or the like, or a screw feed mechanism having a feed screw can be adopted.
Examples of the moving direction of the sludge introduction pipe by the moving means include the axial direction and the vertical direction of the sludge introduction pipe. In addition, a horizontal direction, an oblique direction, a θ direction, or the like may be used. That is, it may be one that can be arbitrarily moved in each direction of XYZθ.
[0016]
[Action]
According to the invention described in claims 1 to 2 , hydrous sludge is ejected in a dispersed state between the lower part of the preheater for cement raw material calcining and the kiln bottom of the dry cement kiln for cement raw material firing. Therefore, the combustion efficiency of the hydrous sludge increases, the time until the hydrous sludge burns is shortened, and it is difficult to form a lump of combustion ash after combustion. Compare this combustion ash to the cement clinker in the kiln. Can be evenly distributed.
[0017]
In particular, between the lower part of the preheater for cement raw material calcining and the bottom of the kiln of a dry cement kiln for firing cement raw material, water-containing sludge is introduced through a sludge introduction pipe by a pressure pump, and sludge is dispersed during this introduction. Since the water-containing sludge is dispersed using the means, substantially all of the water-containing sludge introduced to the kiln kiln bottom side can be effectively dispersed.
[ 0018]
[0019]
Furthermore, when introducing the water-containing sludge into the kiln kiln bottom side, the compressed air from the compressed air supply means passes from the inside of the radiation into the sludge introduction pipe through the fixed inner pipe and the air outlet at the end of the pipe. The water-containing sludge that has been blown in and reaches the one end of the sludge introduction pipe by this air pressure is ejected while being finely dispersed inside the kiln kiln bottom side. Thus, for water sludge in the tube, since the compressed air is blown to blow away et do whichever radial sludge inlet pipe this sludge to the outside, it is possible to disperse the water sludge relatively wide range .
[0020]
According to the second aspect of the present invention, the flow inner pipe is moved by the moving means in the sludge introduction pipe, and the pipe end of the flow inner pipe can be dispersed most effectively with the water-containing sludge. That is, it arrange | positions in the position of several centimeters from the front-end | tip of the water-containing sludge from which the degree of the sauce near the edge part of a sludge introduction pipe changes with the difference in a moisture content. After that, when compressed air from the compressed air supply means is blown outward from the pipe end of the flow inner pipe, the hydrous sludge that has reached the end of the sludge introduction pipe is finely divided into the inside of the kiln kiln bottom by this air pressure. It is ejected while being dispersed. In this way, the moving means moves the pipe end of the pipe in the flow to a position where the water-containing sludge can be most effectively dispersed, so according to the hardness of the water-containing sludge whose degree of dripping varies depending on the water content. Thus, the water-containing sludge can be dispersed well.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings. First, the sludge dispersion introducing apparatus according to the first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a schematic cross-sectional view of a cement firing facility to which a sludge dispersion introducing apparatus according to a first embodiment of the present invention is applied. FIG. 2 is an enlarged cross-sectional view of the sludge dispersing means constituting the sludge dispersion introducing apparatus.
In FIG. 1, 10 is a sludge dispersion introducing device, and this sludge dispersion introducing device 10 is installed in a cement firing facility of a cement manufacturing plant, and thereby incinerates water-containing sludge a using heat at the time of firing cement raw materials. To do.
The cement firing facility is an facility for intermediately producing a cement clinker by firing a cement raw material calcined in the preheater 11 in a dry cement kiln 12. In addition, the dry-type cement kiln 12 used here shall produce a cement clinker at 90-100 t / h.
[0022]
The preheater 11 preheats the cement raw material pulverized by a raw material mill (not shown) to a predetermined temperature so that it can be easily fired by the downstream dry cement kiln 12. The pre-heater 11 is provided with a large number of cyclones mounted on a several-storey steel frame. Further, normally, a gas exhaust system that has a fan and guides the gas generated at the time of calcination to a gas processing facility (not shown) is connected to the uppermost cyclone.
[0023]
The dry cement kiln 12 has a horizontal cylindrical kiln shell slightly inclined downward toward the downstream side. A refractory material is stretched on the inner peripheral surface of the kiln shell.
While rotating the kiln shell in the circumferential direction, the cement raw material from the preheater 11 is fired by heating with a burner using heavy oil or fine coal as a fuel, and a cement clinker is intermediately manufactured. Thereafter, the cement clinker is cooled by a clinker cooler connected to the downstream portion of the dry cement kiln 12 and sent to the finishing process. Next, the sludge dispersion introducing apparatus 10 will be described in detail with reference to FIGS. 1 and 2.
[0024]
As shown in FIG. 1, the sludge dispersion introducing device 10 is in a slurry state, such as sedimented sludge in a sewage treatment plant, between the lower part of the preheater 11 and the kiln bottom part 12a of the dry cement kiln 12, It is directly introduced in a dispersed state and incinerated. Specifically, the water-containing sludge from the externally installed sludge receiving facility is temporarily stored in the sludge tank 14 by the pressure feed pump 13 and then from the sludge tank 14 through the sludge introduction pipe 16 by the pressure feed pump 15 as needed. It is introduced into the kiln bottom 12a of the kiln 12. The temperature of the introduction site of the hydrous sludge a in the kiln bottom part 12a is about 900 ° C. In addition, the pipe end by the side of sludge derivation | leading-out of the sludge introduction pipe | tube 16 has arrange | equalized the inner surface and pipe end surface of the kiln bottom part 12a (refer FIG. 2).
[0025]
Further, as shown in FIG. 2, the compressed sludge a is blown into the pipe end portion of the sludge introduction pipe 16 from the radial outside into the pipe end portion on the sludge outlet side, so that the hydrous sludge a is introduced from the pipe end into the kiln bottom portion 12a. A sludge dispersing means 17 for ejecting is provided.
The sludge dispersing means 17 has a cylindrical jacket 18 for forming a compressed air supply path that is externally fitted to the end of the sludge introduction pipe 16 on the sludge outlet side. An external compressed air supply means 19 is connected to the cylindrical jacket 18. Near the tip of the sludge introduction pipe 16, eight radially-injected compressed air ejection holes 20 in which each hole is drilled obliquely toward the tip are formed. The ejection hole 20 does not necessarily need to be drilled obliquely toward the tip, and may be drilled perpendicular to the axial direction of the sludge introduction pipe 16. Further, the number of ejection holes 20 formed is not limited to eight, but may be any number such as six or ten.
[0026]
Next, a sludge dispersion introduction method using this sludge dispersion introduction apparatus 10 will be described.
As shown in FIG. 1, in the cement firing facility, the cement raw material is calcined while flowing down each cyclone of the preheater 11. Thereafter, the cement raw material flows into the kiln bottom 12a of the dry cement kiln 12 and is fired by the heat of the burner to become a cement clinker. At this time, the hydrous sludge a in the sludge tank 14 is introduced into the kiln bottom portion 12a of the dry cement kiln 12 by the sludge dispersion introducing device 10 through the sludge introduction pipe 16 at an introduction amount of less than 10 t / h. It is poured into the kiln 12 while being dispersed.
Specifically, the water-containing sludge a is introduced into the kiln bottom part 12a. The water-containing sludge (not shown) is temporarily stored in the sludge tank 14 by the pumping pump 13 from the sludge receiving equipment (not shown), and then the sludge is occasionally changed. The pressure feed pump 15 connected to the lower part of the tank 14 is introduced from the sludge introduction pipe 16 into the kiln bottom part 12 a of the dry cement kiln 12.
[0027]
At this time, the compressed air is blown into the sludge introduction pipe 16 through the cylindrical jacket 18 fitted on the sludge introduction pipe 16 from the radial outside through a total of eight ejection holes 20.
Therefore, the hydrous sludge a that has reached the end of the sludge introduction pipe 16 on the sludge discharge side is jetted in a dispersed state into the kiln bottom part 12a by the jet pressure of 3 kgf / cm ² by the blown compressed air. .
[0028]
The water-containing sludge a thus ejected should be incinerated economically by the burner heat at the time of firing the cement raw material, without pre-treating the water-containing sludge a in advance, such as high-cost deodorization, drying, and additive addition. Can do.
Furthermore, the sewage sludge a is dispersed almost throughout the kiln bottom 12 a or the dry cement kiln 12 by the ejection from the sludge introduction pipe 16. Therefore, the contact area between the hydrous sludge a and the combustion gas generated in the dry cement kiln 12 is increased, and the combustion efficiency of the hydrous sludge a is increased. Thereby, the time until the hydrous sludge a burns is shortened. In addition, massive combustion ash is hardly generated after combustion. Further, the combustion ash of the water-containing sludge a can be relatively evenly dispersed in the cement clinker intermediately manufactured in the dry cement kiln 12, and a high-quality cement clinker having a stable composition can be obtained.
[0029]
And since the mechanism which pumps the hydrous sludge a with the pumping pump 15 through the sludge introduction pipe | tube 16 was employ | adopted for the introduction system of the hydrous sludge a, compared with the case where the conveyor conveyance mechanism by a belt conveyor etc. is employ | adopted, for example. Almost all of the water-containing sludge a can be effectively dispersed without leaking.
Further, since compressed air is blown from a total of eight ejection holes 20 so as to wrap this sludge a from the outside of the water-containing sludge a, even with a relatively hard water-containing sludge having a low moisture content, It can be finely broken and dispersed into the kiln bottom 12a.
[0030]
Next, based on FIG. 3, illustrating the sludge dispersion introduced equipment according to a second embodiment of the present invention.
FIG. 3 is an enlarged cross-sectional view of the sludge dispersing means constituting the sludge dispersion introducing apparatus according to the second embodiment of the present invention.
As shown in FIG. 3, the sludge dispersion | distribution introduction apparatus 30 of this 2nd Example is the example which employ | adopted the sludge dispersion | distribution means 31 different from the sludge dispersion | distribution means 17 of 1st Example. That is, the sludge dispersion means 31 has a fixed inner pipe 32 that is inserted in the sludge introduction pipe 16 with its pipe axis aligned, with the sealed pipe end disposed in one end of the sludge introduction pipe 16. Yes.
[0031]
When using this to disperse and introduce the hydrous sludge into the kiln butt portion 12a, a total of eight air outlets 33 formed radially on the peripheral surface of the sealing-side end portion of the fixed inner pipe 32 are used. Compressed air from the compressed air supply device 19 is blown from the inside of the radiation. Thereby, the hydrous sludge is ejected while being dispersed from the pipe end of the sludge introduction pipe 16. As a result, compressed air is blown into the sludge introduction pipe 16 so that the water-containing sludge a is blown out from the inside to the outside, so that the water-containing sludge a is dispersed in a relatively wide range. Can do.
Other configurations, operations, and effects are the same as those of the first embodiment, and thus description thereof is omitted.
[0032]
Next, based on FIG. 4, the sludge dispersion | distribution introduction apparatus which concerns on 3rd Example of this invention is demonstrated.
FIG. 4 is an enlarged cross-sectional view of the sludge dispersing means constituting the sludge dispersion introducing apparatus according to the third embodiment of the present invention.
As shown in FIG. 4, the sludge dispersion introducing device 40 of the third embodiment is an example in which a sludge dispersion means 41 different from the sludge dispersion means 17, 31 of the first and second embodiments is adopted. That is, the sludge dispersing means 41 has an open pipe end disposed in the vicinity of one end of the sludge introduction pipe 16, and a flow inner pipe 42 movably inserted into the sludge introduction pipe 16 and a flow inner pipe 42. , And a moving means 44 for the flow inner pipe 42.
The moving means 44 has an X motor 45 and moves the compressed air supply device 43 in the tube axis direction (X direction) of the sludge introduction pipe 16 and a Z motor 47 and has a compressed air supply device 43. And a Z table 48 for moving up and down.
[0033]
When the sludge dispersing means 43 is used to disperse and introduce the water-containing sludge a into the kiln bottom part 12a, the X table 46 is introduced into the sludge introduction pipe 16 by the X motor 45 and Z motor 47 of the moving means 44. The in-flow pipe 42 is moved by moving the pipe 16 in the pipe axis direction or moving the Z table 48 up and down. Thus, the water-containing sludge a whose degree of sagging changes due to the difference in water content at the position where the water-containing sludge a can be most effectively dispersed at the pipe end of the flow inner pipe 42, that is, near the end of the sludge introduction pipe. It is arranged at a position of several centimeters from the tip.
[0034]
Specifically, for example, in the case of normal water-containing sludge a having a relatively high hardness, the pipe end of the flow inner pipe 42 is positioned at the solid line position in FIG. 4 (on the axis of the sludge introduction pipe 16 and this sludge introduction It is arranged at a position slightly away from one end of the tube 16. Further, in the case of the water-containing sludge a having a slightly high moisture content and slightly low hardness, the pipe end of the flow inner pipe 42 is positioned at the one-dot chain line position in FIG. 4 (on the pipe axis of the sludge introduction pipe 16 and shown in FIG. (Position slightly drawn from the solid line position). Furthermore, in the case of hydrous sludge a having a higher moisture content and lower hardness, the pipe end of the flow inner pipe 42 is positioned below the two-dot chain line position in FIG. 4 (below the pipe axis of the sludge introduction pipe 16 and The sludge introduction pipe 16 is disposed at a position slightly away from one end.
[0035]
Thereafter, when compressed air from the compressed air supply means 43 is blown outward from the pipe end of the flow inner pipe 42, the hydrous sludge a reaching the one end of the sludge introduction pipe 16 by this air pressure is converted into the kiln bottom part 12a. It is ejected while being finely dispersed inside. Thus, since the moving end 44 moves the pipe end of the flow inner pipe 42 to a position where the water-containing sludge a can be most effectively dispersed, the degree of sagging changes due to the difference in water content. Regardless of the hardness of the hydrated sludge a, the hydrated sludge a can be dispersed well.
Other configurations, operations, and effects are the same as those of the first embodiment, and thus description thereof is omitted.
[0036]
【The invention's effect】
According to the present invention, the water-containing sludge is sprayed in a dispersed state between the lower part of the preheater for cement raw material calcining and the kiln bottom of the dry cement kiln for cement raw material firing. Combustion efficiency is increased, and the time until the water-containing sludge is combusted is shortened. Further, it is difficult to form a massive combustion ash after combustion. Useful combustion ash can be dispersed relatively evenly in the cement clinker in the kiln.
[0037]
In particular, since a mechanism for pumping the hydrated sludge through a sludge introduction pipe using a pump is employed in the hydrated sludge introduction system, almost all of the introduced hydrated sludge can be effectively dispersed without leaking.
[0038]
In addition, compressed air is blown from the outside of the water-containing sludge in the sludge introduction pipe, so even water-containing sludge having a low water content and relatively hard water is broken down and dispersed into the kiln kiln bottom side. be able to.
[0039]
Furthermore, since the compressed air is blown to the water-containing sludge in the sludge introduction pipe so that the water-containing sludge is blown out from the inside of the radiation, the water-containing sludge can be dispersed in a relatively wide range.
[0040]
Then, according to the serial mounting of the invention in claim 2, by the moving means, since the move to a position that can be dispersed most effectively water sludge pipe end of the flow within the pipe, high sludge hardness Even if it is low, water-containing sludge can be dispersed well.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view of a cement firing facility to which a sludge dispersion introducing apparatus according to a first embodiment of the present invention is applied.
FIG. 2 is an enlarged cross-sectional view of sludge dispersing means constituting the sludge dispersion introducing apparatus according to the first embodiment of the present invention.
FIG. 3 is an enlarged cross-sectional view of sludge dispersing means constituting a sludge dispersion introducing apparatus according to a second embodiment of the present invention.
FIG. 4 is an enlarged cross-sectional view of sludge dispersing means constituting a sludge dispersion introducing apparatus according to a third embodiment of the present invention.
[Explanation of symbols]
10, 30, 40 Sludge dispersion introduction device,
11 Preheater,
12 Dry cement kiln,
12a Kiln bottom,
15 pumping pump,
16 Sludge introduction pipe,
17, 31, 41 Sludge dispersion means,
19 Compressed air supply device,
20, 33 Air outlet,
32 fixed inner pipe,
42 pipe in flow,
43 Compressed air supply device,
44 Moving means.

Claims (2)

A sludge introduction pipe for hydrous sludge, one end of which is connected between the lower part of the preheater for cement raw material calcining and the kiln bottom of the dry cement kiln for cement raw material firing in the firing process of the cement manufacturing plant,
  Connected to this sludge introduction pipe, a pump that pumps hydrous sludge to the sludge outlet side,
  A sludge dispersion introducing device provided in the sludge introduction pipe and provided with sludge dispersion means for dispersing water-containing sludge from the pipe end of the sludge introduction pipe by blowing compressed air,
  The sludge dispersing means is
  The sealed pipe end is arranged in one end of the sludge introduction pipe, the fixed inner pipe inserted in the sludge introduction pipe with the pipe axis aligned, and the compressed air supplying compressed air to the fixed inner pipe A supply device,
  Compressed air from the compressed air supply device is sent to the sludge introduction pipe from the inside in the radial direction of the sludge introduction pipe via an air outlet formed on the peripheral surface of the sealing side end of the fixed inner pipe. A sludge dispersion introducing device for ejecting water-containing sludge from the pipe end of the sludge introduction pipe by blowing. A sludge introduction pipe for hydrous sludge, one end of which is connected between the lower part of the preheater for cement raw material calcining and the kiln bottom of the dry cement kiln for cement raw material firing in the firing process of the cement manufacturing plant,
  Connected to this sludge introduction pipe, a pump that pumps hydrous sludge to the sludge outlet side,
  A sludge dispersion introducing device provided in the sludge introduction pipe and provided with sludge dispersion means for dispersing water-containing sludge from the pipe end of the sludge introduction pipe by blowing compressed air,
  The sludge dispersing means is
  An open pipe end is arranged in the vicinity of one end of the sludge introduction pipe, and the flow inner pipe inserted into the sludge introduction pipe so as to be movable, a moving means for the flow inner pipe, and the flow inner pipe A compressed air supply device for supplying compressed air;
  The moving means moves the flow inner pipe in the sludge introduction pipe, and arranges the pipe end of the flow inner pipe in the vicinity of the tip of the hydrous sludge, and compresses compressed air from the compressed air supply device in the flow. A sludge dispersion introducing device for ejecting water-containing sludge from the pipe end of the sludge introduction pipe by blowing it outward from the pipe end of the pipe.

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