JPH0631338B2 - Charging equipment for coal gasifiers, etc. - Google Patents

Description

TECHNICAL FIELD The present invention relates to various types of gasification furnaces such as coal, slag tap boilers, coal-fired boilers, and coal recovery of coal gasifiers that are convenient for use in fluidized-bed boilers. Regarding the device.

2. Description of the Related Art An example of a conventional coal gasification furnace, that is, a recovery apparatus for recovering a mixture of unreacted carbon particles and an ash content will be described. A coal gasification furnace shown in FIG. The raw coal and the gasifying agent are supplied from the supply port 55 to the dry distillation gasification reaction section of the gasifier 51 including the combustion gasification section 53 and the molten ash pot section 54, and the same raw material is supplied to the combustion gasification section. Coal and the like are supplied to the supply port 56, by-products are supplied to the resupply port 57, and cooling water is supplied to and discharged from the supply ash 58 and the discharge port 59, respectively, in the molten ash pot portion. Cooler 6 for gas and chewer from a chewer outlet tube 60 at the top of the vaporizer
1 is sent to the chir cyclone 62 to separate the chir inside, and the chr is recycled through the chir recycle pipe 63 and stored in the chor port 64, and then supplied to the by-product chir resupply port in fixed amounts. In addition, the gas is sent from the top of the cyclone to the refining system 66 through the gas transport pipe 65 for refining. Since only the chain cyclone 62 is installed, extremely fine particles cannot be collected, the efficiency is extremely low, and further maintenance during operation cannot be performed. In order to avoid the drawbacks of the above-mentioned conventional charge recovery device and improve the recovery performance, the following device can be considered. That is, the seventh
In the figure, a gasification furnace 68 that receives and gasifies the raw material coal 67 has a combustor 7 that receives coal 69 and air 70, and by-product cheers from a chair recirculation pipe 71, respectively.
2 is attached to the gasification furnace, and a heat exchanger 73 is disposed in the upper part of the gasification furnace, and the gas and the chaff generated in the furnace are sent from the furnace top to the chaper cyclone 75 through the generated gas pipe 74. The separated gas is made to flow and stored inside the chaperbin 76, and the separated gas is filtered by the chair bag filter 77, and the filtered gas is discharged to the desulfurization precision dedusting system 78. The collected chaper is sent to the chaper bin and stored in the same manner as the chaper, and then the storage chaper is supplied to the metering and supplying chaper 80 through the lock chaper 79, and then the pressure of the air or the inert gas 81 is utilized in a constant amount. The feeder 82 is used to feed the recirculation pipe. However, in the above-described recirculation-type charge recovery device, during the period when the coal gasification furnace is stopped, there is a risk that the charge staying in the recovery system including the charge hopper will be cooled and solidified. The problems that make maintenance and inspection difficult are inevitable.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention This invention has high performance, is easy to maintain and inspect, has high reliability, and is safe and easy to operate. It is to provide a charge collecting device that does not have such a problem.

MEANS FOR SOLVING THE PROBLEMS The present invention is directed to a method in which a gas generated in a furnace and a chaper separated from a plurality of chair cyclones arranged in parallel are stored in a chaper spa, and the chaper separated gas is stored. Accumulated in the mixer, and then sent to each of a plurality of side-by-side chairbag filters to be filtered,
The filtered gas is accumulated in another mixer that can communicate with the mixer and then discharged to the refining system, and the filter collection chaper is stored in the chaperhopper together with the separation charate and then the storage chaper is kept in a fixed amount. Each of them is supplied to the furnace for recirculation, and further, an inert gas or the like is sent to each of the filters so that they can be back-washed freely, and the above-mentioned chain cyclones and bag filters and their respective recovery systems are heated from the outside. It is something that can be done freely.

According to the structure of the present invention, since a plurality of cher cyclones and bag filters are installed,
While the gasification furnace is in operation, a part of the cyclone and bag filter can be stopped for maintenance and inspection, and even at the time of partial load, by using only the number corresponding to that, the proper flow velocity to the cyclone can be ensured. It can be maintained and can operate in a high cyclone efficiency state,
Further, since a mixer for accumulating the separated gas of each cyclone and another mixer for accumulating the filtered gas of each bag filter are provided, the gas piping is facilitated and the gas is equalized. The recovery performance is significantly improved, and even if the number of each of the cyclones and bag filters installed is different, it is easy to connect them, which can contribute to a reduction in equipment costs, and the two mixers can be connected so that they can communicate with each other. Since the bypass line is formed in this way, it is possible to continue without stopping operation even when a transient increase in pressure loss of the filter occurs, and each of the bag filters can be backwashed with an inert gas or the like. Since some of the filters can be cleaned during operation, there is no risk of explosion because the cleaning medium is an inert gas and no air is used. No and reliable, also because it was freely heat the cyclone and Bagufuiruta, and it like Chiya recovery system of, can prevent clogging due to cooling and solidification of the remaining Chiya during shutdown.

EXAMPLE Next, an example of the present invention will be described with reference to the drawings.
In FIGS. 1, 2, 3, 4 and 5, the heat exchanger 2 is built in the upper part of the furnace and the ash hopper 22 is built in the lower part of the furnace to make the raw coal 2
4, a plurality of chain cyclones 5 provided with the outlet gas connecting pipes 3 at the top of the gasification furnace 1 for receiving the coal gasifying agent 25 and the by-product cheer 26 and gasifying the raw material coal, respectively, are provided with inlet valves 4 respectively. The cyclone is connected via a rotary feeder 7 and a chain outlet valve 8 to the lower part of the cyclone to be connected to a chaper hopper 9, respectively, and the top of the cyclone is connected via a gas outlet valve 6 respectively. , And each of a plurality of side-by-side cheer bag filters 12 connected to the mixer via an inlet valve 11 is further connected to a lower part of the filter by a rotary feeder 14 and a cheer outlet valve 15, respectively. The other mixer 1 is provided with a gas outlet valve 13 at each of the tops of the mixers 1 and 2, which are connected to the above-mentioned chaperhopper.
7, and further, the mixer is connected to the refining system 27, and is also connected to the mixer 10 via the bypass valve 16. Then, after connecting the above-mentioned chaper to the chaper metering hopper 18, it is further passed through a rotary valve 19 to transfer gas 21 such as nitrogen gas, generated gas and air.
Is connected to a free-to-operate chain feeder 20, and then the feeder and the gasification furnace are connected. The chain cyclone has a gas inlet 28, as shown in FIG.
The produced gas of the gasification furnace 1 is received from the gasification furnace 1 to generate a swirling flow inside the chamber to separate the chewers and to discharge the separated gas from the cheer outlet 29. The separated gas is also ejected from the gas outlet 30. As shown in FIG. 3, the separated gas is received from the gas inlet 31 and filtered by the internal filter 32, and the filtered gas is discharged from the gas outlet 33.
In addition to the above, the filter collecting channel is configured to be discharged from the channel outlet 34. It should be noted that, as shown in FIG. 4, a cleaning medium 35 such as an inert gas, steam, or nitrogen is sent from the lower portion to each of the above-mentioned bag bug filters through the backwash valve 23. The filter is configured so as to be washable, and further, as shown in FIG. 5, each of the cyclones 5, the rotary feeder 7,
A heater 3 capable of externally heating the respective parts of the cheer outlet valve 8, each of the cheer bag filters 12, the rotary feeder 14, the cheer outlet valve 15, the cheer hopper 9, the cheer metering hopper 18, and the rotary valve 19 and piping between the components.
The heater 6 uses heat such as steam, hot water, and electric heat. Therefore, the gas generated in the gasification furnace 1 is cooled by the heat exchanger 2 and then sent to the plurality of chain cyclones 5 through the outlet gas communication pipe 3 and the inlet valve 4 to be charged. The primary collection of
The recovered chaier is stored in the chaper hopper 9 through the rotary feeder 7 and the chaier outlet valve 8, and the gas, which has been subjected to the primary separation of the chaier in the cyclone, is accumulated in the mixer 10 via the outlet valve 6. Further, it is supplied to a plurality of cheer bag filters 12 through a filter inlet valve 11 to carry out secondary separation of the chair inside, and the recovered chaper is passed through a rotary feeder 14 and a chair outlet valve 15 to a chaperhopper 9. Accumulated. In this way, the produced gas, after having collected most of the cherries, passes through the filter outlet valve 13 and is accumulated in another mixer 17, and then discharged to the purification system 27. Due to the bypass line connecting the both mixers via the bypass valve 16, the bag filter can be maintained and inspected if necessary, and the operation can be continued even when the differential pressure of the filter is increased. It will be possible. Further, the recovered chaff stored in the chaper reaches the chafer feeder 20 through the chaper metering chaper 18 and the rotary valve 19, and is then recirculated to the gasification furnace 1 by the gas pressure of the carrier gas 21.

EFFECTS OF THE INVENTION As described above, according to the present invention, the collection performance of the chain is remarkably improved, maintenance and inspection can be easily performed, and safe and easy driving operation can be realized.
It has a great utility value in the industry such that it can safely back-clean the clogging of the filter of the bag filter and improve the reliability, and also it can prevent the clogging of the tire recovery system due to the cooling and solidification of the retention chases in advance.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIGS. 2 and 3 are perspective views showing the same parts of a chain cyclone and a chain bag filter, respectively, by cutting out the main parts, and FIG. FIG. 5 is a circuit diagram showing a backwash system of a charge bag filter, FIG. 5 is a circuit diagram showing a heating range of a charge cyclone and a bag filter, and a charge recovery system of them, and FIG. 6 is a conventional coal gasification furnace. FIG. 7 is a circuit diagram of another charge collecting device, and FIG. 7 is a circuit diagram of another charge collecting device. 1 ... Gasification furnace, 5 ... Cheer cyclone, 9 ... Cheer hoop, 10 ... Mixer, 12 ... Cheer bag filter, 16 ... Bypass valve, 17 ... Other mixer, 20 ...
… Chair feeder, 23 …… Backwash valve, 27 …… Refining system,
35 ... Cleaning medium, 36 ... Heater.

Claims (1)

[Claims] 1. A gas produced in a furnace and sent to each of a plurality of chain cyclones provided side by side to separate them, and the separated chaier is stored in a chaper hopper, and the chaper separated gas is accumulated in a mixer. After that, it is sent to each of the multiple bag bug filters arranged in parallel and filtered,
The filtered gas is accumulated in another mixer that can communicate with the mixer and then discharged to the refining system, and the filter collection chaper is stored in the chaperhopper together with the separation charate and then the storage chaper is kept in a fixed amount. Each of them is supplied to the furnace for recirculation, and further, an inert gas or the like is sent to each of the filters so that they can be back-washed freely, and the above-mentioned chain cyclones and bag filters and their respective recovery systems are heated from the outside. A char recovery device for coal gasification furnaces, etc.