CN213872730U

CN213872730U - Lurgi furnace cold torch washing and separating device

Info

Publication number: CN213872730U
Application number: CN202022867061.1U
Authority: CN
Inventors: 王猛; 杨延铭
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-08-03
Anticipated expiration: 2030-12-04

Abstract

The utility model relates to a Lurgi odd stove cold flame washing separator, including cold torch, liquid holding vessel and coarse coal gas exhaust gas pipeline, its characterized in that is equipped with washing piece-rate system and filtration system between coarse coal gas exhaust gas pipeline and cold flame air inlet, washing piece-rate system include the scrubber, separator and washing circulating pump, the separator is microscler tank structure, filtration system include the filter, be equipped with foraminiferous filter in the filter, the separator gas vent is connected with the filter air inlet, the filter gas vent is connected with cold flame air inlet. The utility model has the advantages that: the crude gas in the crude gas exhaust pipeline is washed, separated and filtered, so that the pollution to the environment is reduced; the equipment, the pipelines and the roads around the cold torch can be prevented from being frozen in winter, and the workload of manually cleaning the cold torch is reduced.

Description

Lurgi furnace cold torch washing and separating device

Technical Field

The utility model belongs to the technical field of Lurgi stove torch, concretely relates to cold torch washing separator of Lurgi stove.

Background

The torch is a special facility for treating combustible gas or steam which cannot be collected and reprocessed in the coalification equipment, and is an important measure for ensuring safe production and reducing environmental pollution. Since the implementation of new environmental protection methods, safety production and environmental protection are more and more emphasized, and coal chemical devices are continuously developed to be large-scale, so that safe and stable operation of a torch system is more and more important.

The torches used in lurgi furnaces are cold and hot torches. The hot torch is raw gas which is qualified in treatment components but cannot be connected to the grid, and the raw gas in the hot torch can be combusted. The cold torch is used for treating crude gas containing a large amount of water vapor, coal dust and other impurities during starting and stopping, and the crude gas in the cold torch has a too low heat value to be ignited and can only be discharged into the atmosphere.

The existing cold torch system comprises a cold torch connected with a crude gas discharge pipeline and a liquid collection tank arranged at the lower part of the cold torch, wherein the discharged crude gas is the crude gas discharged during the startup and shutdown of the Lurgi furnace or the crude gas discharged during the accident of the Lurgi furnace, the crude gas is discharged into the atmosphere after gas-liquid separation of the cold torch, and the separated liquid is collected by the liquid collection tank.

In the actual production process, the length of the cold torch body is generally 4-5 meters, and the gas-liquid separation effect of the crude gas entering the cold torch is not ideal because the crude gas carries a large amount of liquid. The method is particularly obvious when the gas emission is large, a large amount of crude gas which is not fully separated from water, coal dust and tar can be discharged into the atmosphere, so that the cold torch pipeline and the ground are seriously polluted, and simultaneously sulfide can also pollute the environment.

Disclosure of Invention

To the problems existing in the prior art, the utility model provides a lurgi furnace cold flame washing separator.

The utility model is realized like this.

The utility model discloses a Lurgi furnace cold flame washing separator, including cold torch, liquid collection tank and crude gas exhaust pipeline, the top of cold torch be equipped with cold flame torch gas vent, it has cold flame torch air inlet to open on the upper middle portion lateral wall, the bottom is equipped with cold flame torch leakage fluid dram, crude gas exhaust pipeline and cold flame torch air inlet intercommunication, liquid collection tank top be equipped with the collection tank inlet, the bottom is opened has the collection tank leakage fluid dram, pass through the pipe connection between collection tank inlet and the cold flame torch leakage fluid dram, its characterized in that is equipped with washing separation system and filtration system between crude gas exhaust pipeline and cold flame torch air inlet;

the washing and separating system comprises a washer, a separator and a washing circulating pump, wherein a washer air inlet is formed in the top of the washer, a coarse gas exhaust pipeline is communicated with the washer through the washer air inlet, a washing liquid inlet is formed in the left side of the upper part of the washer, a washing nozzle is arranged in the washer, a washer air outlet is formed in the right side of the middle of the washer, a washer liquid outlet is formed in the bottom of the washer, one end of a washing liquid conveying pipeline penetrates through the air inlet of the coarse gas washer and is connected with the washing nozzle, and the other end of the washing liquid conveying pipeline is respectively connected with a gas outlet of the circulating pump and a gas water pump;

the separator is of a long tank structure, a separator exhaust port is formed in the top of the long tank structure, a separator air inlet is formed in the left side of the middle of the separator, a separator liquid inlet is formed in the left side of the lower portion of the separator, a separator liquid outlet is formed in the bottom of the separator, the separator air inlet is connected with the scrubber exhaust port through a pipeline, the separator liquid inlet is connected with the scrubber liquid outlet through a pipeline, the separator liquid outlet is respectively connected with a liquid inlet of a circulating pump and an underground tank through a separator discharge pipeline, a first stop valve is arranged on a washing circulation pipeline, connected with a washing liquid conveying pipeline, of a liquid outlet of the circulating pump, and a second stop valve is arranged on the washing circulation pipeline, connected with the separator discharge pipeline, of the liquid inlet of the circulating pump;

the filter system comprises a filter, wherein a filter liquid inlet is formed in the top of the filter, the filter liquid inlet is connected with a desalination water pipeline from a deoxygenation station, a filter air inlet is formed in the left side of the upper portion of the filter, a filter air outlet is formed in the right side of the upper portion of the filter, a filter liquid outlet is formed in the lower portion of the right side of the filter, the filter air inlet is connected with a separator air outlet of a separator through a pipeline, the filter air outlet is connected with a cold torch air inlet pipeline of a cold torch through a pipeline, a filter plate with holes is arranged in the filter, and the filter liquid outlet and a collection tank liquid outlet of the cold torch are respectively communicated with a separator discharge pipeline at the bottom of the separator through pipelines.

Furthermore, a washing liquid regulating valve is arranged on the washing liquid conveying pipeline.

Furthermore, a separation liquid regulating valve is arranged on the discharge pipeline of the separator.

Furthermore, the filtering plate with holes in the filter is a stainless steel plate, and the aperture of the filtering plate is 200 meshes.

Further, the height of the separator is 9-10 meters.

The utility model has the advantages that:

the utility model relates to a lurgi stove cold flame washing separator washes, separates and filters the coarse coal gas in the coarse coal gas exhaust pipeline through washing piece-rate system and filtration system, reduces buggy, tar, moisture in the coarse coal gas by a wide margin, can also reduce wherein sulfur dioxide, phenols, ammonia and benzene class pollutant slightly, reduces the pollution to the environment. The reduction of the moisture in the crude gas discharged in winter can prevent the peripheral equipment, pipelines and roads of the cold torch from being frozen, and the potential safety hazard of the cold torch to personnel is eliminated; the workload of manually cleaning the cold torch is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, the utility model discloses a lurgi furnace cold flame torch washing separator, including cold torch 4, liquid collection tank 5 and crude gas exhaust pipeline 6, the top of cold torch 4 be equipped with cold torch gas vent 26, it has cold flame torch air inlet 13 to open on the middle and upper portion lateral wall, the bottom is equipped with cold flame torch leakage fluid dram 28, crude gas exhaust pipeline 6 and cold flame torch air inlet 13 communicate, liquid collection tank 5 top be equipped with collection tank air inlet 29, the bottom is opened has collection tank leakage fluid dram 30, pass through the pipe connection between collection tank air inlet 29 and the cold flame torch leakage fluid dram 28, its characterized in that is equipped with washing separation system and filtration system between crude gas exhaust pipeline 6 and cold flame torch air inlet 13;

the washing and separating system comprises a washer 1, a separator 2 and a washing circulating pump 3, wherein the top of the washer is provided with a washer air inlet 15, a crude gas exhaust pipeline 6 is communicated with the washer 1 through the washer air inlet 15, the left side of the upper part of the washer 1 is provided with a washing liquid inlet 16, a washing nozzle is arranged in the washer, the right side of the middle part of the washer 1 is provided with a washer air outlet 17, the bottom of the washer 1 is provided with a washer gas outlet 19, one end of a washing liquid conveying pipeline 7 penetrates through the crude gas washer air inlet 15 to be connected with the washing nozzle, the other end of the washing liquid conveying pipeline is respectively connected with a liquid outlet of the circulating pump and a gas water pump, the washing liquid conveying pipeline 7 is also provided with a regulating valve washing liquid 10, and the gas water pump is positioned in a gas water working section and is used for providing low-pressure spraying water,

the separator is a long tank structure, the top of the long tank structure is provided with a separator exhaust port 22, a separator air inlet 21 is arranged on the left side of the middle part of the separator, a separator liquid inlet 18 is arranged on the left side of the lower part of the separator, the bottom of the separator is provided with a separator liquid outlet 20, the separator air inlet 21 is connected with the scrubber air outlet 17 through a pipeline, the separator liquid inlet 18 is connected with the scrubber liquid outlet 19 through a pipeline, the separator liquid outlet 20 is respectively connected with the liquid inlet of the circulating pump and the underground tank through a separator discharge pipeline 14, a first stop valve is arranged on a washing circulating pipeline 8 which is connected with a washing liquid conveying pipeline 7 at a liquid outlet of the circulating pump, a second stop valve is arranged on a washing circulating pipeline 8 which is connected with a liquid inlet of the circulating pump and a separator discharge pipeline 14, and the underground tank is used for collecting dust-containing gas water in a gasification section;

the filtering system comprises a filter 9, wherein the top of the filter 9 is provided with a filter liquid inlet 24, the filter liquid inlet 24 is connected with a desalted water pipeline 11 from an oxygen removal station, the left side of the upper part of the filter 9 is provided with a filter air inlet 23, the filter air inlet 23 is in pipeline connection with a separator air outlet 22 of a separator 2, the right side of the upper part of the filter 2 is provided with a filter air outlet 25, the filter air outlet 25 is in pipeline connection with a cold flame torch air inlet 13 of a cold flame torch 4, the lower part of the right side of the filter 9 is provided with a filter liquid outlet 27, the filter liquid outlet 27 is communicated with a separator discharge pipeline 14 at the bottom of the separator 2, the filter 9 is internally provided with a filter plate with holes, the filter plate with the holes is a stainless steel plate, and the hole diameter of the filter plate with the holes is 200 meshes.

The washing liquid regulating valve 10, the separation liquid regulating valve 12 and the washing circulating pump 3 are electrically connected with a dcs control system, which is the prior art.

The utility model discloses a theory of operation:

the medium in the crude gas discharge pipeline 6 is crude gas discharged during the start-up and shutdown of the Lurgi gasifier or discharged crude gas when the Lurgi gasifier has an accident, the crude gas during the start-up and shutdown, the medium in the cleaning solution conveying pipeline 7 is low-pressure jet gas water from a gas water workshop, the gas water containing impurities such as coal dust, tar, ammonia, phenol, sulfide and the like in the separator discharge pipeline 14 is sent to an underground tank and then sent to an aminophenol recovery workshop for treatment, and desalted water in the desalted water pipeline 11 is from an oxygen removal station.

Crude gas enters the washer 1 through a washer gas inlet 15 through a crude gas exhaust pipeline 6, low-pressure jet gas water enters the washer 1 through a washing liquid inlet 16 through a washing liquid conveying pipeline 7, the spray head sprays mist-shaped low-pressure jet gas water to wash the crude gas in the washer 1, and the low-pressure jet gas water can absorb most of coal dust, tar, ammonia and phenol;

the washed crude gas enters the separator through the gas outlet 17 of the scrubber and the gas inlet 21 of the separator, the height of the separator 2 is generally far greater than that of the cold torch about 9 m, at the moment, the crude gas contains a large amount of water which is separated in the separator 2 by gravity, and because the specific gravity of the gas and the liquid is different, when the liquid flows together with the gas, the liquid can bear large gravity action to generate a downward speed, and the gas still flows towards the original direction, namely, the downward liquid of the liquid and the gas in a gravity field is attached to the wall surface and converged together to flow to the bottom of the separator;

the liquid levels of the cold torch washer 1 and the cold torch separator 2 are adjusted by the cleaning solution adjusting valve 10, the separation solution adjusting valve 12 and the washing circulating pump 3 through a dcs control system, the crude gas is circularly washed by using gas water, and when the liquid level is too high or impurities in the gas water are too much, the crude gas is sent to an aminophenol recovery workshop;

the water in the separated crude gas is greatly reduced and is discharged into a filter 9 through a separator exhaust port 22 and a filter air inlet 23, the coal dust in the crude gas is further removed by a stainless steel plate with holes in the filter 9, the stainless steel plate is washed by desalted water from a desalted water pipeline 11 regularly, and the washed water containing the coal dust is discharged into a separator discharge pipeline 14 through a filter liquid outlet 27;

the filtered crude gas enters the cold torch through the filter exhaust port 25 and the cold torch air inlet 13, the gas and the liquid are further separated in the cold torch, and the liquid is discharged into the liquid collecting tank 5 and is converged into the separator discharge pipeline 14 through the collecting tank liquid outlet 30.

At the moment, the pollutants such as crude gas moisture, coal dust, tar, ammonia, phenol and the like discharged by the cold torch are greatly reduced, sulfides are also reduced to a certain extent, the discharge standard of the cold torch is met, and the gas water containing the coal dust, the tar, the phenol compounds and the ammonia compounds can be recovered through a subsequent phenol-ammonia recovery workshop.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Claims

1. A Lurgi furnace cold flame washing and separating device comprises a cold flame, a liquid collecting tank and a crude gas exhaust pipeline, wherein a cold flame exhaust port is arranged at the top of the cold flame, a cold flame air inlet is formed in the side wall of the middle upper part of the cold flame, a cold flame liquid outlet is formed in the bottom of the cold flame exhaust pipeline, the crude gas exhaust pipeline is communicated with the cold flame air inlet, a collecting tank liquid inlet is formed in the top of the liquid collecting tank, a collecting tank liquid outlet is formed in the bottom of the liquid collecting tank, and the collecting tank liquid inlet is connected with the cold flame liquid outlet through a pipeline;

2. The lurgi furnace cold torch washing and separating device of claim 1, wherein the washing liquid conveying pipeline is provided with a washing liquid regulating valve.

3. The lurgi furnace cold torch scrubbing and separating device of claim 1, wherein said separator discharge line is provided with a separator liquid regulating valve.

4. The lurgi furnace cold torch washing and separating device of claim 1, wherein the perforated filter plate of said filter is a stainless steel plate with a 200 mesh pore size.

5. The lurgi furnace cold torch scrubbing-and-separating unit of claim 1, wherein said separator has a height of 9-10 meters.