CN220047635U - High-efficient entrapment system of tar in pyrolysis raw coke oven gas - Google Patents
High-efficient entrapment system of tar in pyrolysis raw coke oven gas Download PDFInfo
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- CN220047635U CN220047635U CN202321465841.0U CN202321465841U CN220047635U CN 220047635 U CN220047635 U CN 220047635U CN 202321465841 U CN202321465841 U CN 202321465841U CN 220047635 U CN220047635 U CN 220047635U
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 17
- 239000000571 coke Substances 0.000 title description 24
- 238000007670 refining Methods 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000000428 dust Substances 0.000 claims abstract description 9
- 239000012716 precipitator Substances 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 10
- 239000002699 waste material Substances 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000003463 adsorbent Substances 0.000 description 13
- 239000003245 coal Substances 0.000 description 8
- 239000012535 impurity Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 235000019198 oils Nutrition 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000004821 distillation Methods 0.000 description 5
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 4
- 235000011114 ammonium hydroxide Nutrition 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012263 liquid product Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011335 coal coke Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000019476 oil-water mixture Nutrition 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model discloses a high-efficiency collecting system for tar in pyrolysis crude gas, which comprises a dust filter, a refining tank, a cooler and an oil-water separator, wherein the dust filter comprises a shell and a plurality of spiral conveyors which penetrate through the shell and are arranged in parallel up and down, the conveying directions of two adjacent spiral conveyors are opposite, the outlet of the upper spiral conveyor is communicated with the inlet of the next spiral conveyor through a descending pipe, a heat exchange pipe is arranged in the refining tank, a tube side liquid outlet of the cooler is communicated with the inlet of the oil-water separator through a pipeline, the outlet of the oil-water separator is communicated with the bottom of the shell through a pipeline, the top of the shell is communicated with the lower part of the refining tank through a pipeline, the upper part of the refining tank is provided with a finished oil outlet, and the top is provided with an exhaust port. The utility model has the advantages of little environmental pollution, little heat waste, good tar quality and obvious economic and social values.
Description
Technical Field
The utility model relates to the technical field of coking production, in particular to a high-efficiency collecting system for tar in pyrolysis raw coke oven gas.
Background
The coal pyrolysis technology is one of important ways of coal quality-dividing efficient clean conversion utilization, clean gas, liquid and solid products in three different forms can be produced through coal pyrolysis, and then different components in the coal are utilized in a quality-dividing way, namely, the gas and liquid products are used as chemicals, and solid coal coke is used as a raw material for further gasification. The coal pyrolysis technology realizes the gradient quality utilization of coal, improves the comprehensive utilization rate of coal resources and the added value of products, reduces the environmental pollution caused by coal burning, has obvious economic benefit, social benefit and environmental protection benefit, and is an important link in recycling tar from pyrolysis raw gas.
At present, the technology mainly adopted for recycling tar by industrially pyrolyzing raw coke oven gas is as follows: spraying a large amount of ammonia water to the raw gas, so that the raw gas can be rapidly quenched, and simultaneously, the tar is recovered by combining an electric tar precipitator. In the treatment process, a large amount of high-concentration organic wastewater is generated after ammonia water is sprayed, and the organic wastewater is difficult to treat and has the problem of environmental pollution; secondly, in the whole tar recovery process, the heat contained in the raw gas is not recovered and utilized, so that the heat is wasted; finally, the recovered tar contains certain moisture and impurities, and the quality is poor. Therefore, development of a high-efficiency tar trapping system for pyrolysis raw gas with small environmental pollution, less heat waste and good tar quality is objectively needed.
Disclosure of Invention
The utility model aims to provide a high-efficiency system for capturing tar in pyrolysis raw gas, which has the advantages of less environmental pollution, less heat waste and good tar quality.
The utility model aims at realizing the purposes, comprising a dust filter, a refining tank, a cooler and an oil-water separator, wherein the dust filter comprises a shell and a plurality of screw conveyors which penetrate through the shell and are arranged in parallel up and down, the conveying directions of two adjacent screw conveyors are opposite, the inlet and the outlet of each screw conveyor are positioned on the outer side of the shell, the outlet of the last screw conveyor is communicated with the inlet of the next screw conveyor through a descending pipe, the feeding end of the uppermost screw conveyor is provided with an air outlet pipe, the discharging end of the lowermost screw conveyor is provided with an air inlet pipe, the refining tank is internally provided with a heat exchange pipe, the inlet end of the heat exchange pipe is communicated with the air outlet pipe through a pipeline, the outlet end of the heat exchange pipe is communicated with the inlet of the cooler through a pipeline, the outlet of the oil-water separator is communicated with the bottom of the shell through a pipeline, the top of the shell is communicated with the lower part of the refining tank through a pipeline, the upper part of the refining tank is provided with a finished oil outlet, and the top is provided with an air outlet.
Further, slag blocking nets are arranged in the air inlet pipe and the air outlet pipe.
Further, a dehumidifier is arranged in the air inlet pipe.
Further, the heat exchange tube is provided with a heat conducting fin.
Further, a jacket is arranged on the outer wall of the refining tank, the top of the jacket is communicated with the air outlet pipe through a pipeline, and the bottom of the jacket is communicated with a tube side air inlet of the cooler through a pipeline.
Further, a turbine is arranged at the bottom in the refining tank.
Further, the exhaust port and the tube side outlet of the cooler are connected with an electric tar precipitator through pipelines, and an oil discharge port of the electric tar precipitator is communicated with the oil-water separator through pipelines.
When the utility model is operated, the adsorbent is added from the feed inlet of the uppermost screw conveyor, so that the adsorbent can be filled in all screw conveyors, raw coke oven gas is introduced from the air inlet pipe on the lowermost screw conveyor, the raw coke oven gas continuously flows upwards along the screw conveyor and the descending pipe, the adsorbent absorbs impurities in the raw coke oven gas in the flowing process, the impurity content in the raw coke oven gas is reduced, the purity of tar is improved, the raw coke oven gas enters the heat exchange pipe through the pipeline to cool and then enters the cooler to be condensed, the tar is discharged into the oil-water separator to be separated and purified, part of water is contained in the separated tar, the separated tar is sequentially introduced into the shell and the refining tank to exchange heat with the raw coke oven gas, the heat in the raw coke oven gas is utilized to heat the tar, and the water in the tar is evaporated and discharged, so that the tar with high quality can be obtained. In the treatment process, the raw gas absorbs impurity particles in the raw gas through the adsorbent, and the moisture in the raw gas is removed through a heating distillation mode, so that the purity and quality of tar are improved; secondly, the heat in the raw gas is utilized by the distillation of the tar, so that the utilization efficiency of the heat is improved, and the waste of the heat is reduced; in addition, the use of ammonia water in the traditional tar trapping process is avoided, so that the problem of environmental pollution caused by organic wastewater is avoided, and the environmental pollution is reduced. The utility model has the advantages of little environmental pollution, little heat waste, good tar quality and obvious economic and social values.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
in the figure: 1-dust filter, 2-refining tank, 3-cooler, 4-oil-water separator, 5-shell, 6-screw conveyor, 7-downcomer, 8-outlet duct, 9-inlet duct, 10-heat exchange tube, 11-finished oil outlet, 12-exhaust port, 13-slag screen, 14-dehumidifier, 15-heat conducting fin, 16-jacket, 17-turbine, 18-electric tar precipitator.
Description of the embodiments
The utility model is further described below with reference to the accompanying drawings, without limiting the utility model in any way, and any alterations or modifications based on the utility model are within the scope of the utility model.
As shown in figure 1, the utility model comprises a dust filter 1, a refining tank 2, a cooler 3 and an oil-water separator 4, wherein the cooler 3 is an existing heat exchange device and is usually a tube-type heat exchanger, in the utility model, cooling media are introduced into the shell side of the cooler 3, the cooling media can use cooling media commonly used in the industry such as ice water, cold water and the like, raw gas is condensed by using the cooling media, tar in the raw gas is condensed, the oil-water separator 4 is an existing device, the oil-water separator is used for separating oil-water mixtures by utilizing the difference of oil-water quality, the dust filter 1 comprises a shell 5 and a plurality of screw conveyors 6 penetrating through the shell 5 and being arranged in parallel up and down, the conveying directions of two adjacent screw conveyors 6 are opposite, the inlet and the outlet of the screw conveyor 6 are both positioned at the outer side of the shell 5, the outlet of the upper screw conveyor 6 and the inlet of the next screw conveyor 6 are communicated through a descending tube 7, the feeding end of the uppermost screw conveyor 6 is provided with an air inlet tube 9, the discharging end of the lowermost screw conveyor 6 is provided with an air inlet tube 6, the screw conveyor 6 is used as the existing device, the heat exchanger is required to be discharged from the shell 6, the heat exchanger can be further raised when the heat exchanger is required to be removed from the shell 6, the heat exchanger can be simultaneously cooled, the heat exchanger can be removed from the shell and the heat exchanger can be simultaneously cooled, and the heat exchanger can be further raised, and the heat exchanger can be simultaneously required to be simultaneously cooled, and absorbed by the heat exchanger and the heat exchanger can be simultaneously cooled by the heat exchanger and the heat exchanger is required to be cooled, the refining tank 2 is internally provided with a heat exchange tube 10, the inlet end of the heat exchange tube 10 is communicated with an air outlet pipe 8 through a pipeline, the outlet end of the heat exchange tube is communicated with a tube side air inlet of the cooler 3 through a pipeline, a tube side liquid outlet of the cooler 3 is communicated with an inlet of the oil-water separator 4 through a pipeline, an outlet of the oil-water separator 4 is communicated with the bottom of the shell 5 through a pipeline, the top of the shell 5 is communicated with the lower part of the refining tank 2 through a pipeline, the upper part of the refining tank 2 is provided with a finished oil outlet 11, and the top is provided with an air outlet 12.
During operation, the adsorbent is added from the feed inlet of the uppermost screw conveyor 6, so that the adsorbent can be filled in all screw conveyors 6, raw coke oven gas is introduced from the air inlet pipe 9 on the lowermost screw conveyor 6, continuously flows upwards along the screw conveyors 6 and the descending pipe 7, impurities in the raw coke oven gas are absorbed by the adsorbent in the flowing process, the impurity content in the raw coke oven gas is reduced, the purity of tar is improved, the raw coke oven gas then enters the heat exchange pipe 10 through a pipeline, and then enters the cooler 3 to be condensed to obtain tar, the tar is discharged into the oil-water separator 4 to be separated and purified, part of water is contained in the separated tar, the tar is sequentially introduced into the shell 5 and the refining tank 2 to exchange heat with the raw coke oven gas, the tar is heated by heat in the raw coke oven gas, and the water in the tar is evaporated and discharged, and high-quality tar can be obtained. In the treatment process, the raw gas absorbs impurity particles in the raw gas through the adsorbent, and the moisture in the raw gas is removed through a heating distillation mode, so that the purity and quality of tar are improved; secondly, the heat in the raw gas is utilized by the distillation of the tar, so that the utilization efficiency of the heat is improved, and the waste of the heat is reduced; in addition, the use of ammonia water in the traditional tar trapping process is avoided, so that the problem of environmental pollution caused by organic wastewater is avoided, and the environmental pollution is reduced.
In order to prevent the adsorbent from being mixed into the raw gas and then being taken away by the raw gas, the slag blocking net 13 is arranged in the air inlet pipe 9 and the air outlet pipe 8, the slag blocking net 13 can prevent the adsorbent from entering the air outlet pipe 8 and the air inlet pipe 9, the capturing effect of tar in the raw gas is affected, and the loss and the waste of the adsorbent are also prevented.
The dehumidifier 14 is arranged in the air inlet pipe 9, and the dehumidifier 14 is of an existing structure, and because raw gas generally contains certain water vapor, the water vapor is removed through the dehumidifier 14, so that on one hand, the water vapor is prevented from condensing on the surface of the adsorbent, the adsorption effect of the adsorbent on impurities in the raw gas is reduced, and on the other hand, the moisture content in the raw gas can be reduced, and further the purity and the content of tar are improved.
The heat exchange tube 10 is provided with the heat conducting fin 15, and the heat exchange area of tar and raw coke oven gas can be increased through the arrangement of the heat conducting fin 15, so that the heat exchange efficiency of the raw coke oven gas and tar is improved.
The outer wall of the refining tank 2 is provided with the jacket 16, the top of the jacket 16 is communicated with the air outlet pipe 8 through a pipeline, the bottom of the jacket 16 is communicated with a tube side air inlet of the cooler 3 through a pipeline, when the refining tank is operated, raw coke oven gas is split, part of raw coke oven gas enters the jacket 16 through the pipeline, heating oil is carried out from the outer side of the refining tank 2, the raw coke oven gas entering the heat exchange tube 10 is combined with the other part of raw coke oven gas, meanwhile, heating oil is carried out from the inner side and the outer side, the heat exchange efficiency of the raw coke oven gas and tar is improved, and the refining efficiency of the tar in the refining tank 2 is improved.
The turbine 17 is arranged at the bottom in the refining tank 2, and the turbine 17 is in the prior art, so that tar in the refining tank 2 can be driven to form rotational flow in the running process, and the heating efficiency and the heating uniformity of the tar are improved.
The exhaust port 12 and the tube side outlet of the cooler 3 are connected with an electric tar precipitator 18 through pipelines, the electric tar precipitator 18 is the existing equipment, tar droplets and raw gas are separated by utilizing the action of a high-voltage direct current electric field, an oil discharge port of the electric tar precipitator 18 is communicated with the oil-water separator 4 through the pipelines, steam generated by distillation of tar in the refining tank 2 and tail gas generated by condensation of raw gas in the cooler 3 also contain a certain amount of tar, and the tar in the tar is captured through the electric tar precipitator 18, so that waste and loss of tar are avoided.
Claims (7)
1. A high-efficiency collecting system for tar in pyrolysis crude gas comprises a dust filter (1), a refining tank (2), a cooler (3) and an oil-water separator (4), and is characterized in that the dust filter (1) comprises a shell (5) and a plurality of spiral conveyors (6) which penetrate through the shell (5) and are arranged in parallel up and down, the conveying directions of two adjacent spiral conveyors (6) are opposite, an inlet and an outlet of each spiral conveyor (6) are positioned on the outer side of the shell (5), an outlet of the last spiral conveyor (6) is communicated with an inlet of the next spiral conveyor (6) through a descending pipe (7), a feed end of the uppermost spiral conveyor (6) is provided with an air outlet pipe (8), a discharge end of the lowermost spiral conveyor (6) is provided with an air inlet pipe (9), an inlet end of each heat exchange pipe (10) is communicated with the oil-water inlet pipe (8) through a pipeline, an outlet end of each heat exchange pipe (10) is communicated with an air inlet of the cooler (3) through a pipeline, an inlet of the cooler (3) is communicated with an outlet of the bottom of the shell (4) through a descending pipe (5), a discharge end of each spiral conveyor (6) is communicated with the bottom of the shell (4) through the shell (4), the upper part of the refining tank (2) is provided with a finished oil outlet (11), and the top is provided with an exhaust port (12).
2. The efficient collection system for tar in pyrolysis raw gas according to claim 1, wherein a slag blocking net (13) is arranged in each of the air inlet pipe (9) and the air outlet pipe (8).
3. The efficient tar collecting system for pyrolysis raw gas according to claim 1, wherein a dehumidifier (14) is arranged in the air inlet pipe (9).
4. The efficient tar collecting system for pyrolysis raw gas of claim 1, wherein the heat exchange tube (10) is provided with a heat conducting fin (15).
5. The efficient collection system for tar in pyrolysis raw gas according to claim 1, wherein a jacket (16) is arranged on the outer wall of the refining tank (2), the top of the jacket (16) is communicated with an air outlet pipe (8) through a pipeline, and the bottom of the jacket (16) is communicated with a tube side air inlet of the cooler (3) through a pipeline.
6. The efficient tar collecting system for pyrolysis of raw gas according to claim 1, wherein a turbine (17) is arranged at the bottom in the refining tank (2).
7. The efficient tar collecting system for pyrolysis raw gas according to claim 1, wherein the exhaust port (12) and a tube side outlet of the cooler (3) are connected with an electric tar precipitator (18) through pipelines, and an oil drain port of the electric tar precipitator (18) is communicated with the oil-water separator (4) through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321465841.0U CN220047635U (en) | 2023-06-09 | 2023-06-09 | High-efficient entrapment system of tar in pyrolysis raw coke oven gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321465841.0U CN220047635U (en) | 2023-06-09 | 2023-06-09 | High-efficient entrapment system of tar in pyrolysis raw coke oven gas |
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| Publication Number | Publication Date |
|---|---|
| CN220047635U true CN220047635U (en) | 2023-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321465841.0U Active CN220047635U (en) | 2023-06-09 | 2023-06-09 | High-efficient entrapment system of tar in pyrolysis raw coke oven gas |
Country Status (1)
| Country | Link |
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| CN (1) | CN220047635U (en) |
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2023
- 2023-06-09 CN CN202321465841.0U patent/CN220047635U/en active Active
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