CN103965971A - Twin tower coal tar recycling system and twin tower coal tar recycling method - Google Patents
Twin tower coal tar recycling system and twin tower coal tar recycling method Download PDFInfo
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- CN103965971A CN103965971A CN201410213111.0A CN201410213111A CN103965971A CN 103965971 A CN103965971 A CN 103965971A CN 201410213111 A CN201410213111 A CN 201410213111A CN 103965971 A CN103965971 A CN 103965971A
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- pyrolysis gas
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- 239000011280 coal tar Substances 0.000 title claims abstract description 293
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004064 recycling Methods 0.000 title abstract 10
- 238000000197 pyrolysis Methods 0.000 claims abstract description 103
- 238000005406 washing Methods 0.000 claims abstract description 85
- 239000011269 tar Substances 0.000 claims abstract description 65
- 238000001816 cooling Methods 0.000 claims abstract description 36
- 239000012716 precipitator Substances 0.000 claims abstract description 36
- 239000007921 spray Substances 0.000 claims description 53
- 239000003595 mist Substances 0.000 claims description 20
- 239000012809 cooling fluid Substances 0.000 claims description 18
- 239000010881 fly ash Substances 0.000 claims description 13
- 239000000428 dust Substances 0.000 abstract description 12
- 239000007789 gas Substances 0.000 description 69
- 238000011084 recovery Methods 0.000 description 14
- 239000003034 coal gas Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 210000000952 spleen Anatomy 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011285 coke tar Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000037351 starvation Effects 0.000 description 1
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Abstract
The invention discloses a twin tower coal tar recycling system. The twin tower coal tar recycling system comprises a dust remover (2), a heavy coal tar washing tower (3), a light coal tar washing tower (4) and an electrical tar precipitator (5), wherein the dust remover (2) is communicated with the outlet of a pyrolyzing furnace (1) and used for carrying out dust removal on pyrolysis gas produced by the pyrolyzing furnace (1); the heavy coal tar washing tower (3) is communicated with the outlet of the dust remover (2) and used for recycling heavy coal tar in the pyrolysis gas; the light coal tar washing tower (4) is communicated with the outlet of the heavy coal tar washing tower (3) and used for recycling light coal tar in the pyrolysis gas; the electrical tar precipitator (5) is communicated with the outlet of the light coal tar washing tower (4) and used for recycling coal tar fogdrop in the pyrolysis gas. The invention also discloses a twin tower coal tar recycling method. According to the twin tower coal tar recycling system and the win tower coal tar recycling method, twin tower circulation is adopted for cooling high-temperature pyrolysis gas, and a heavy component and a light component of coal tar are separately recycled, so that the light coal tar in the pyrolysis gas can be completely separated out and recycled, and the dust content is low.
Description
Technical field
The present invention relates to a kind of coal tar recovering system, relate in particular to a kind of double-tower type coal tar recovering system and recovery method.
Background technology
Low-rank coal, by after the pyrolysis of high temperature starvation, can produce the high temperature pyrolysis gas that contains tar, can carry a large amount of dust secretly in pyrolysis gas simultaneously.Pyrolysis gas after fly-ash separator is removed most of dust, again by utilizing heat-eliminating medium and high temperature pyrolysis gas direct contact heat transfer is cooling or indirect heat exchange is cooling, reclaim the coal tar in pyrolysis gas, in this stage, the dust of not collected by fly-ash separator is also captured down in the lump.
At present, the technique high temperature pyrolysis gas after dedusting being purified mainly contains: utilize ammonia circulation spraying cooling pyrolysis gas and electrical tar precipitator to reclaim tar; Or the tar of utilization recovery recirculation spraying cooling pyrolysis gas and electrical tar precipitator recovery tar after heat exchange is cooling; Or utilize the indirect cooling heat of heat-eliminating medium to vent one's spleen and electrical tar precipitator recovery tar.
Specifically, the patent document that publication number is CN103409174A discloses the cooling coke tar recovery system of a kind of low water consumption coal gas and method.Wherein, this system comprises tar spray column, one-level electrical tar precipitator, inter cooler, secondary electric fishing light oil device, gas exhaust machine, tar pool, tar recycle pump, the first tar tank, the second tar tank, the 3rd tar tank, pressure pump, water purifying tank, cooling tower.High temperature rough gas containing tar enters tar spray column, adopt tar recycle pump that the cooling tar in the tar pool of bottom is sprayed in tower by spray header, cooling down high-temperature raw gas, the tar trapping that is cooled enters bottom tar pool, cooling rear raw gas enters one-level electrical tar precipitator, raw gas after one-level electrical tar precipitator trapping tar is after inter cooler is further cooling, enter secondary electric fishing light oil device and further remove the tar in coal gas,, containing the cooled coal gas of tar, do not deliver to next process through gas exhaust machine.
Publication number is that the patent document of CN103013583A discloses the cooling and tar recovery process of a kind of pyrolysis coal gas dust removal.Wherein, the device that this technique adopts comprises the superheater, hot precipitator, accident quench tower, heat recovery boiler, inter cooler and the electrical tar precipitator that connect successively.This technique first passes into pyrolysis coal gas superheater and is cooled to 400～700 DEG C, then pass into hot precipitator and carry out dedusting, then pass into heat recovery boiler, be cooled to 50～100 DEG C, condensation water and tar simultaneously, then pass into inter cooler, be cooled to 10～30 DEG C, further condensation water and tar, finally pass into electrical tar precipitator, reclaims the tar fog and the water smoke that carry.
Publication number is that the patent document of CN102492490A discloses a kind of gas purification process and system.Wherein, this technique for to carry out predrying by feed coal in moisture eliminator; then send into the pyrolysis of high temperature pyrolysis stove; pyrolysis generation is sent into high temperature cyclone separator containing raw gas grey, that contain coal tar and is removed macrobead dust; remove raw gas after macrobead dust again through the further dedusting of high-temperature filter; coal gas after dedusting is again through waste heat boiler recovery waste heat; heat exchange to the coal gas of 300-350 DEG C enter the coal tar fluid counter current contact of quenching column and 40-80 DEG C wash, cooling, the coal tar containing in coal gas enters in coal tar fluid by discharging at the bottom of tower.
Mainly there is the shortcoming of following several respects in above-mentioned existing technique: 1) indirectly cooling section heat transfer effect is effective not as direct contact heat transfer, and equipment size is large, and facility investment is large; 2) an existing tower tar circulated sprinkling cooling down high-temperature pyrolysis gas reclaims tar technique and exists because circulation tar viscosity causes greatly the smooth and heat of tar circulation and change the problems such as weak effect, exists in addition the light component organic efficiency in tar low; 3) in the washing tower of existing process using, do not arrange mist eliminator, cause pyrolysis gas to carry tar droplet secretly and enter in hypomere equipment, increased the load of hypomere equipment.
Summary of the invention
The object of the present invention is to provide and a kind ofly can separately reclaim the heavy component of coal tar and double-tower type coal tar recovering system and the recovery method of light component.
For achieving the above object, the technical scheme of a kind of double-tower type coal tar recovering system of the present invention and recovery method is:
A kind of double-tower type coal tar recovering system, for reclaiming the coal tar of the pyrolysis gas that pyrolysis oven produces, comprising: fly-ash separator, be connected with the outlet of pyrolysis oven, and the pyrolysis gas that pyrolysis oven is produced carries out dedusting; Heavy coal tar washing tower, is connected with the outlet of fly-ash separator, and inside is provided with reverse spray equipment, and it is reverse cooling that reverse spray equipment utilizes heavy coal tar to carry out pyrolysis gas, reclaims the heavy coal tar in pyrolysis gas; Lightweight coal tar washing tower, is connected with the outlet of heavy coal tar washing tower, and inside is provided with reverse spray equipment, and it is reverse cooling that reverse spray equipment utilizes lightweight coal tar to carry out pyrolysis gas, reclaims the lightweight coal tar in pyrolysis gas; Electrical tar precipitator, is connected with the outlet of lightweight coal tar washing tower, reclaims the coal tar droplet in pyrolysis gas.
Further, the bottom of heavy coal tar washing tower is provided with the coal tar oil sump for collecting heavy coal tar, and reverse spray equipment is connected with coal tar oil sump, recycles the heavy coal tar in coal tar oil sump; The bottom of lightweight coal tar washing tower is provided with the coal tar oil sump for collecting lightweight coal tar, and reverse spray equipment is connected with coal tar oil sump, recycles the lightweight coal tar in coal tar oil sump.
Further, between the reverse spray equipment in heavy coal tar washing tower and coal tar oil sump, be provided with interchanger, interchanger is for changing the temperature of heavy coal tar; Between reverse spray equipment in lightweight coal tar washing tower and coal tar oil sump, be provided with interchanger, interchanger is for changing the temperature of lightweight coal tar.
Further, the coal tar outlet of electrical tar precipitator is connected with the coal tar oil sump of lightweight coal tar wash tower bottoms with the coal tar oil sump of heavy coal tar wash tower bottoms respectively, and the lightweight coal tar reclaiming in electrical tar precipitator flow in lightweight coal tar oil sump and/or heavy coal tar oil sump.
Further, the exit of heavy coal tar washing tower and lightweight coal tar washing tower is respectively arranged with the mist eliminator of the coal tar droplet for reclaiming pyrolysis gas.
A kind of double-tower type coal tar recovering method, be used for the coal tar of the pyrolysis gas that reclaims pyrolysis oven generation, comprise the following steps: the temperature that pyrolysis oven produces is that the pyrolysis gas of 300-500 DEG C enters in fly-ash separator and carries out dedusting, and the pyrolysis gas after dedusting enters in heavy coal tar washing tower; Pyrolysis gas after heavy coal tar washing tower utilizes reverse spray equipment to dedusting carries out reverse cooling, reclaims heavy coal tar, and the cooling fluid of reverse spray equipment ejection is that temperature is the heavy coal tar of 60-130 DEG C; Heavy coal tar falls into the coal tar oil sump of heavy coal tar wash tower bottoms, and cooled temperature is that the pyrolysis gas of 100-150 DEG C enters in lightweight coal tar washing tower; It is reverse cooling that lightweight coal tar washing tower utilizes reverse spray equipment to carry out the pyrolysis gas entering, and reclaims lightweight coal tar, and the cooling fluid of reverse spray equipment ejection is that temperature is the lightweight coal tar of 30-50 DEG C; Lightweight coal tar falls into the coal tar oil sump of lightweight coal tar wash tower bottoms, and cooled temperature is that the pyrolysis gas of 40-60 DEG C enters in electrical tar precipitator; Electrical tar precipitator is collected the coal tar droplet in pyrolysis gas, and the lightweight coal tar being recovered to is delivered in the coal tar oil sump of lightweight coal tar wash tower bottoms or in the coal tar oil sump of heavy coal tar wash tower bottoms.
Further, the temperature that falls into the heavy coal tar of the coal tar oil sump of heavy coal tar wash tower bottoms is 150-200 DEG C, by interchanger, the temperature of heavy coal tar is reduced to 60-130 DEG C, a heavy coal tar part after cooling, as output of products, is used as cooling fluid in the reverse spray equipment of part input.
Further, the temperature that falls into the lightweight coal tar of the coal tar oil sump of lightweight coal tar wash tower bottoms is 80-100 DEG C, by interchanger, the temperature of lightweight coal tar is reduced to 30-50 DEG C, a lightweight coal tar part after cooling, as output of products, is used as cooling fluid in the reverse spray equipment of part input.
Further, first reclaimed after coal tar droplet by mist eliminator, then enter in lightweight coal tar washing tower by the cooled pyrolysis gas of heavy coal tar washing tower, mist eliminator is arranged on the exit of heavy coal tar washing tower.
Further, first reclaimed after coal tar droplet by mist eliminator, then enter in electrical tar precipitator by the cooled pyrolysis gas of lightweight coal tar washing tower, mist eliminator is arranged on the exit of lightweight coal tar washing tower.
Compared with existing coal tar recovering technique, double-tower type coal tar recovering system of the present invention and recovery method have the following advantages:
1) adopt double tower circulating cooling high temperature pyrolysis gas, separately reclaim heavy component and the light component of coal tar, the lightweight coal tar in pyrolysis gas can total number be separated out, reclaim, and dustiness is very low;
2) lightweight coal tar part electrical tar precipitator being reclaimed is delivered to heavy coal tar washing tower, to regulate the tar viscosity in heavy coal tar washing tower, ensures the steady running of system;
3) washing tower top increases mist eliminator, effectively reduces carrying secretly of coal tar droplet in pyrolysis gas.
Brief description of the drawings
Fig. 1 is the structural representation of double-tower type coal tar recovering system of the present invention.
Embodiment
In order better to understand object of the present invention, structure and function, below in conjunction with accompanying drawing, a kind of double-tower type coal tar recovering system of the present invention and recovery method are done to further detailed description.
As shown in Figure 1, double-tower type coal tar recovering system of the present invention, for reclaiming the coal tar of the pyrolysis gas that pyrolysis oven 1 produces, comprises the fly-ash separator 2, heavy coal tar washing tower 3, lightweight coal tar washing tower 4 and the electrical tar precipitator 5 that connect in turn.Wherein, fly-ash separator 2 is connected with the outlet of pyrolysis oven 1, carries out dedusting for the pyrolysis gas that pyrolysis oven 1 is produced, and can be existing ceramic filter fly-ash separator, electric precipitator and multicyclone dust collector etc.
Further, heavy coal tar washing tower 3 is connected with the outlet of fly-ash separator 2, inside is provided with reverse spray equipment 31, it is reverse cooling that reverse spray equipment 31 utilizes heavy coal tar to carry out pyrolysis gas, to reclaim the heavy coal tar (initial boiling point temperature is as more than 170 DEG C coal tar) in pyrolysis gas.Specifically, as shown in Figure 1, reverse spray equipment 31 in the present embodiment comprises multiple shower nozzles, shower nozzle sprays cooling fluid (heavy coal tar) down, the pyrolysis gas entering in heavy coal tar washing tower 3 upwards flows, thus pyrolysis gas just can reversely contact with cooling fluid, heat exchange, the heavy coal tar in pyrolysis gas is separated out.
Further, the bottom of heavy coal tar washing tower 3 is provided with the coal tar oil sump 32 for collecting heavy coal tar, and reverse spray equipment 31 is connected with coal tar oil sump 32, thus, and the heavy coal tar just can be recycled in coal tar oil sump 32.In addition, between reverse spray equipment 31 in heavy coal tar washing tower 3 and coal tar oil sump 32, be also provided with interchanger 33, interchanger 33 is for changing the temperature of heavy coal tar, a heavy coal tar part after change temperature, as output of products, is used as cooling fluid in the reverse spray equipment 31 of part input.
Further, heavy coal tar washing tower 3 exits also can be provided with the mist eliminator (not shown) of the coal tar droplet for reclaiming pyrolysis gas.Mist eliminator is set in the present invention, can reduces entrained oil mist in pyrolysis gas, reduce the load of hypomere equipment.
Further, lightweight coal tar washing tower 4 is connected with the outlet of heavy coal tar washing tower 3, inside is provided with reverse spray equipment 41, it is reverse cooling that reverse spray equipment 41 utilizes lightweight coal tar to carry out pyrolysis gas, to reclaim the lightweight coal tar (end point temperature is as the coal tar below 170 DEG C) in pyrolysis gas.Specifically, as shown in Figure 1, reverse spray equipment 41 in the present embodiment also comprises multiple shower nozzles, shower nozzle sprays cooling fluid (lightweight coal tar) down, the pyrolysis gas entering in lightweight coal tar washing tower 4 upwards flows, thus pyrolysis gas just can reversely contact with cooling fluid, heat exchange, the lightweight coal tar in pyrolysis gas is separated out.
Further, the bottom of lightweight coal tar washing tower 4 is also provided with the coal tar oil sump 42 for collecting lightweight coal tar, and reverse spray equipment 41 is connected with coal tar oil sump 42, recycles the lightweight coal tar in coal tar oil sump 42.In addition, between reverse spray equipment 41 in lightweight coal tar washing tower 4 and coal tar oil sump 42, be also provided with interchanger 43, interchanger 43 is for changing the temperature of lightweight coal tar, a lightweight coal tar part after change temperature, as output of products, is used as cooling fluid in the reverse spray equipment 41 of part input.
Further, lightweight coal tar washing tower 4 exits also can be provided with the mist eliminator (not shown) of the coal tar droplet for reclaiming pyrolysis gas.Mist eliminator is set in the present invention, can reduces entrained oil mist in pyrolysis gas, reduce the load of hypomere equipment.
Further, electrical tar precipitator 5 is connected with the outlet of lightweight coal tar washing tower 4, for reclaiming the coal tar droplet of pyrolysis gas, the coal tar outlet of electrical tar precipitator 5 is connected with the coal tar oil sump 32 of heavy coal tar washing tower 3 bottoms and the coal tar oil sump 42 of lightweight coal tar washing tower 4 bottoms respectively, thus, the lightweight coal tar reclaiming in electrical tar precipitator 5 just optionally flow in coal tar oil sump 32 and/or coal tar oil sump 42, when as too high in the coal tar viscosity in heavy coal tar washing tower 3, can utilize the lightweight coal tar that electrical tar precipitator 5 is recovered to regulate the coal tar viscosity in heavy coal tar washing tower 3, the steady running of guarantee system.In addition, vent one's spleen and be sent to downstream processing operation from electrical tar precipitator 5 Low Temperature Thermal out.
With reference to Fig. 1, double-tower type coal tar recovering method of the present invention comprises the following steps:
1) temperature that pyrolysis oven 1 produces is that the pyrolysis gas of 300-500 DEG C enters in fly-ash separator 2 and carries out dedusting, and the pyrolysis gas after dedusting enters in heavy coal tar washing tower 3.
2) to utilize reverse spray equipment 31 to carry out the pyrolysis gas after dedusting reverse cooling for heavy coal tar washing tower 3, reclaims heavy coal tar, and the cooling fluid that reverse spray equipment 31 sprays is that temperature is the heavy coal tar of 60-130 DEG C.
3) heavy coal tar falls into the coal tar oil sump 32 of heavy coal tar washing tower 3 bottoms, temperature is 150-200 DEG C, by interchanger 33, the temperature of heavy coal tar is reduced to 60-130 DEG C, a heavy coal tar part after cooling, as output of products, is used as cooling fluid in the reverse spray equipment 31 of part input.
Cooled temperature is that the pyrolysis gas of 100-150 DEG C enters in lightweight coal tar washing tower 4, before pyrolysis gas enters lightweight coal tar washing tower 4, can reclaim the coal tar droplet in pyrolysis gas by the mist eliminator that is arranged on heavy coal tar washing tower 3 exits.
4) to utilize reverse spray equipment 41 to carry out the pyrolysis gas entering reverse cooling for lightweight coal tar washing tower 4, reclaims lightweight coal tar, and the cooling fluid that reverse spray equipment 41 sprays is that temperature is the lightweight coal tar of 30-50 DEG C.
5) lightweight coal tar falls into the coal tar oil sump 42 of lightweight coal tar washing tower 4 bottoms, temperature is 80-100 DEG C, by interchanger 43, the temperature of lightweight coal tar is reduced to 30-50 DEG C, a lightweight coal tar part after cooling, as output of products, is used as cooling fluid in the reverse spray equipment 41 of part input.
Cooled temperature is that the pyrolysis gas of 40-60 DEG C enters in electrical tar precipitator 5, before pyrolysis gas enters electrical tar precipitator 5, can reclaim the coal tar droplet in pyrolysis gas by the mist eliminator that is arranged on lightweight coal tar washing tower 4 exits.
6) electrical tar precipitator 5 is collected the coal tar droplet in pyrolysis gas, and the lightweight coal tar being recovered to is delivered in the coal tar oil sump 42 of lightweight coal tar washing tower 4 bottoms or in the coal tar oil sump 32 of heavy coal tar washing tower 3 bottoms.
7) from electrical tar precipitator 5 low temperature pyrogenation gas fed downstream treatment process out.
By specific embodiment, the present invention is further described above; but it should be understood that; here concrete description; should not be construed as the restriction to the spirit and scope of the invention; one of ordinary skilled in the art, reading the various amendments of after this specification sheets, above-described embodiment being made, belongs to the scope that the present invention protects.
Claims (10)
1. a double-tower type coal tar recovering system, the coal tar of pyrolysis gas producing for reclaiming pyrolysis oven (1), is characterized in that, comprising:
Fly-ash separator (2), is connected with the outlet of pyrolysis oven (1), and the pyrolysis gas that pyrolysis oven (1) is produced carries out dedusting;
Heavy coal tar washing tower (3), be connected with the outlet of fly-ash separator (2), inside is provided with reverse spray equipment (31), it is reverse cooling that reverse spray equipment (31) utilizes heavy coal tar to carry out pyrolysis gas, reclaims the heavy coal tar in pyrolysis gas;
Lightweight coal tar washing tower (4), be connected with the outlet of heavy coal tar washing tower (3), inside is provided with reverse spray equipment (41), it is reverse cooling that reverse spray equipment (41) utilizes lightweight coal tar to carry out pyrolysis gas, reclaims the lightweight coal tar in pyrolysis gas;
Electrical tar precipitator (5), is connected with the outlet of lightweight coal tar washing tower (4), reclaims the coal tar droplet in pyrolysis gas.
2. double-tower type coal tar recovering system according to claim 1, it is characterized in that, the bottom of heavy coal tar washing tower (3) is provided with the coal tar oil sump (32) for collecting heavy coal tar, reverse spray equipment (31) is connected with coal tar oil sump (32), recycles the heavy coal tar in coal tar oil sump (32); The bottom of lightweight coal tar washing tower (4) is provided with the coal tar oil sump (42) for collecting lightweight coal tar, reverse spray equipment (41) is connected with coal tar oil sump (42), recycles the lightweight coal tar in coal tar oil sump (42).
3. double-tower type coal tar recovering system according to claim 2, it is characterized in that, between reverse spray equipment (31) in heavy coal tar washing tower (3) and coal tar oil sump (32), be provided with interchanger (33), interchanger (33) is for changing the temperature of heavy coal tar; Between reverse spray equipment (41) in lightweight coal tar washing tower (4) and coal tar oil sump (42), be provided with interchanger (43), interchanger (43) is for changing the temperature of lightweight coal tar.
4. double-tower type coal tar recovering system according to claim 2, it is characterized in that, the coal tar outlet of electrical tar precipitator (5) is connected with the coal tar oil sump (42) of lightweight coal tar washing tower (4) bottom with the coal tar oil sump (32) of heavy coal tar washing tower (3) bottom respectively, and the lightweight coal tar reclaiming in electrical tar precipitator (5) flow in coal tar oil sump (32) and/or coal tar oil sump (42).
5. double-tower type coal tar recovering system according to claim 1, it is characterized in that, the exit of heavy coal tar washing tower (3) and lightweight coal tar washing tower (4) is respectively arranged with the mist eliminator of the coal tar droplet for reclaiming pyrolysis gas.
6. a double-tower type coal tar recovering method, the coal tar of pyrolysis gas producing for reclaiming pyrolysis oven (1), is characterized in that, comprises the following steps:
The temperature that pyrolysis oven (1) produces is that the pyrolysis gas of 300-500 DEG C enters in fly-ash separator (2) and carries out dedusting, and the pyrolysis gas after dedusting enters in heavy coal tar washing tower (3);
It is reverse cooling that heavy coal tar washing tower (3) utilizes reverse spray equipment (31) to carry out the pyrolysis gas after dedusting, reclaim heavy coal tar, the cooling fluid of reverse spray equipment (31) ejection is that temperature is the heavy coal tar of 60-130 DEG C;
Heavy coal tar falls into the coal tar oil sump (32) of heavy coal tar washing tower (3) bottom, and cooled temperature is that the pyrolysis gas of 100-150 DEG C enters in lightweight coal tar washing tower (4);
It is reverse cooling that lightweight coal tar washing tower (4) utilizes reverse spray equipment (41) to carry out the pyrolysis gas entering, reclaim lightweight coal tar, the cooling fluid of reverse spray equipment (41) ejection is that temperature is the lightweight coal tar of 30-50 DEG C;
Lightweight coal tar falls into the coal tar oil sump (42) of lightweight coal tar washing tower (4) bottom, and cooled temperature is that the pyrolysis gas of 40-60 DEG C enters in electrical tar precipitator (5);
Electrical tar precipitator (5) is collected the coal tar droplet in pyrolysis gas, and the lightweight coal tar being recovered to is delivered in the coal tar oil sump (42) of lightweight coal tar washing tower (4) bottom or in the coal tar oil sump (32) of heavy coal tar washing tower (3) bottom.
7. double-tower type coal tar recovering method according to claim 6, it is characterized in that, the temperature that falls into the heavy coal tar of the coal tar oil sump (32) of heavy coal tar washing tower (3) bottom is 150-200 DEG C, by interchanger (33), the temperature of heavy coal tar is reduced to 60-130 DEG C, a heavy coal tar part after cooling, as output of products, is used as cooling fluid in a part reverse spray equipment of input (31).
8. double-tower type coal tar recovering method according to claim 6, it is characterized in that, the temperature that falls into the lightweight coal tar of the coal tar oil sump (42) of lightweight coal tar washing tower (4) bottom is 80-100 DEG C, by interchanger (43), the temperature of lightweight coal tar is reduced to 30-50 DEG C, a lightweight coal tar part after cooling, as output of products, is used as cooling fluid in a part reverse spray equipment of input (41).
9. double-tower type coal tar recovering method according to claim 6, it is characterized in that, first reclaimed after coal tar droplet by mist eliminator by the cooled pyrolysis gas of heavy coal tar washing tower (3), enter in lightweight coal tar washing tower (4), mist eliminator is arranged on the exit of heavy coal tar washing tower (3) again.
10. double-tower type coal tar recovering method according to claim 6, it is characterized in that, first reclaimed after coal tar droplet by mist eliminator by the cooled pyrolysis gas of lightweight coal tar washing tower (4), enter in electrical tar precipitator (5), mist eliminator is arranged on the exit of lightweight coal tar washing tower (4) again.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104388128A (en) * | 2014-11-26 | 2015-03-04 | 陕西煤业化工技术研究院有限责任公司 | System and method for dedusting of pyrolysis raw gas and tar recycling employing oil-cooling |
| CN104449880A (en) * | 2014-12-16 | 2015-03-25 | 新奥科技发展有限公司 | Crude coal gas purifying method and crude coal gas purifying device |
| CN106244248A (en) * | 2016-08-18 | 2016-12-21 | 樊晓光 | A kind of coke-stove gas cooling residual heat retracting device and technique |
| CN106281475A (en) * | 2016-09-09 | 2017-01-04 | 新疆广汇中化能源技术开发有限公司 | Raw coke oven gas dust arrester |
| CN108753372A (en) * | 2018-07-25 | 2018-11-06 | 易高环保能源研究院有限公司 | Device and method for oil washing purification and oil recovery of pyrolysis gas |
| CN109453621A (en) * | 2018-12-21 | 2019-03-12 | 江苏格陵兰传热科技有限公司 | A kind of waste gas recovery utilizes energy saver |
| CN109880658A (en) * | 2019-04-04 | 2019-06-14 | 陕西煤业化工技术研究院有限责任公司 | A tar recovery system and process |
| CN110527563A (en) * | 2018-12-26 | 2019-12-03 | 陕西煤业化工集团神木天元化工有限公司 | The recovery system of coal tar in a kind of pyrolysis coal gas |
| CN110922995A (en) * | 2019-11-20 | 2020-03-27 | 新奥生物质能(天津)有限公司 | Biomass high-temperature pyrolysis gas treatment method and treatment system |
| CN115999770A (en) * | 2023-01-09 | 2023-04-25 | 湖北元首科技有限公司 | High-efficient running combined electrical tar precipitator |
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| CN104388128A (en) * | 2014-11-26 | 2015-03-04 | 陕西煤业化工技术研究院有限责任公司 | System and method for dedusting of pyrolysis raw gas and tar recycling employing oil-cooling |
| CN104449880A (en) * | 2014-12-16 | 2015-03-25 | 新奥科技发展有限公司 | Crude coal gas purifying method and crude coal gas purifying device |
| CN106244248A (en) * | 2016-08-18 | 2016-12-21 | 樊晓光 | A kind of coke-stove gas cooling residual heat retracting device and technique |
| CN106281475A (en) * | 2016-09-09 | 2017-01-04 | 新疆广汇中化能源技术开发有限公司 | Raw coke oven gas dust arrester |
| CN108753372A (en) * | 2018-07-25 | 2018-11-06 | 易高环保能源研究院有限公司 | Device and method for oil washing purification and oil recovery of pyrolysis gas |
| CN109453621A (en) * | 2018-12-21 | 2019-03-12 | 江苏格陵兰传热科技有限公司 | A kind of waste gas recovery utilizes energy saver |
| CN110527563A (en) * | 2018-12-26 | 2019-12-03 | 陕西煤业化工集团神木天元化工有限公司 | The recovery system of coal tar in a kind of pyrolysis coal gas |
| CN109880658A (en) * | 2019-04-04 | 2019-06-14 | 陕西煤业化工技术研究院有限责任公司 | A tar recovery system and process |
| CN109880658B (en) * | 2019-04-04 | 2024-07-02 | 陕西煤业化工技术研究院有限责任公司 | Tar recovery system and process |
| CN110922995A (en) * | 2019-11-20 | 2020-03-27 | 新奥生物质能(天津)有限公司 | Biomass high-temperature pyrolysis gas treatment method and treatment system |
| CN115999770A (en) * | 2023-01-09 | 2023-04-25 | 湖北元首科技有限公司 | High-efficient running combined electrical tar precipitator |
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