CN103007696A - Device and method for treating carbon black tail gas and application of tail gas - Google Patents
Device and method for treating carbon black tail gas and application of tail gas Download PDFInfo
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- CN103007696A CN103007696A CN2013100016857A CN201310001685A CN103007696A CN 103007696 A CN103007696 A CN 103007696A CN 2013100016857 A CN2013100016857 A CN 2013100016857A CN 201310001685 A CN201310001685 A CN 201310001685A CN 103007696 A CN103007696 A CN 103007696A
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Abstract
The invention discloses a device and a method for treating carbon black tail gas and an application of the tail gas. The device comprises a carbon black tail gas pressurizing fan, a dehydration tower and a dehydrated tail gas fan, which are connected in sequence, wherein the upper part of the dehydration tower is further connected with a spraying water pump; the lower part of the dehydration tower is further connected with a circulating cooling water system; the circulating cooling water system is further connected with the spraying water pump; and the dehydration tower sequentially comprises a de-foaming device, a liquid distributor, a gas-liquid distributor and a gas initial distributor from top to bottom. According to the device disclosed by the invention, a lot of water in the carbon black tail gas can be effectively removed, the calorific value of the carbon black tail gas is improved, the dew point of the tail gas is reduced, the corrosion to equipment is relieved, harmful substances including carbon black dust are removed, the quality of the carbon black tail gas is improved, national energy conservation and emission reduction are met, and an industrial policy of the circular economy is developed; the device has obvious economic benefits and social benefits; and the treated carbon black tail gas replaces melted-down coal gas of a coke furnace and the replaced melted-down coal gas with the high calorific value is supplied for cities, so that effective and recycled utilization of resources is achieved.
Description
Technical field
The present invention relates to a kind of carbon black tail gas treatment technology, particularly a kind of dewatered clean of carbon black tail gas is processed.
Background technology
Carbon black tail gas is the low heat value pernicious gas that contains combustible component that discharges in the carbon black process, the CO in the tail gas, H
2, CmHn, H
2The gases such as S directly are discharged in the air will cause severe contamination to atmospheric environment.
At present, domestic processing to carbon black tail gas mainly contains following two kinds of approach.A kind of approach is direct high altitude discharge after incinerator burns, although the basic meet the requirement of environmental protection of this way does not effectively utilize thermal source, the tail gas low heat value is about 510Kcal/Nm
3～630Kcal/Nm
3(the carbon black tail gas low heat value is different and different with the kind of carbon black of producing), economy is bad.Another kind of by boiler combustion, produce steam for production, life or drive the generating of steam turbine power generation unit, better economy, but high humidity carbon black tail gas water content is about 38%～41%, and the tail gas low heat value is about 510Kcal/Nm
3～630Kcal/Nm
3(the carbon black tail gas composition is different and different with the kind of carbon black of producing), ignition temperature is low, and exhaust combustion is incomplete, and efficiency of utilization is low, the e-quipment and pipe seriously corroded.
Summary of the invention
One of goal of the invention of the present invention is: for the problem of above-mentioned existence, provide a kind of brand-new carbon black tail gas treating apparatus, to carbon black tail gas dewater, purified treatment, improve carbon black tail gas quality and calorific value.
The technical solution used in the present invention is such:
A kind of carbon black tail gas treating apparatus, comprise the carbon black tail gas booster fan, dehydrating tower and the dehydration tail-gas blower fan that connect successively, described carbon black tail gas booster fan links to each other with the dehydrating tower bottom, dehydrating tower top also is connected with feeding spraying pump, the dehydrating tower bottom also is connected with recirculating cooling water system, institute's circulating water cooling system also is connected with feeding spraying pump, and described dehydrating tower comprises demister, liquid distribution trough, gas-liquid distributor and gas initial distribution device from top to bottom successively;
Demister preferably adopts the heavy duty detergent wire mesh demister, and the drop for separating of tail gas in the dehydrating tower is carried secretly guarantees mass-transfer efficiency, improves the tail gas quality; Liquid distribution trough preferably adopts gravity-type circular groove type distributor, and liquid distribution trough can guarantee to be evenly distributed in the gas-liquid distributor from the feed liquor of feeding spraying pump, and has avoided charging directly to contact with uprising gas, thereby reduces the entrainment of gas; Gas-liquid distributor preferably adopts Box-type Gas-liquid Distributor, has improved the material handling capacity and has reduced pressure drop, has strengthened to drench and has fallen the mass-and heat-transfer function, and the rectangle riser makes uniform gas-liquid distribution, reduces the spray hole count, has improved its anti-clogging; It is stable that gas initial distribution device has guaranteed that carbon black tail gas advances tower, improved carbon black tail gas and be evenly distributed, and reduced liquid entrainment and Pressure Drop.
As preferably, the lightweight structured packing is set in described dehydrating tower, such as the light ceramics structured packing, the performances such as the lightweight structured packing has light specific gravity, compression strength is good, anticorrosive, anti-aging, the heatproof degree high, the filler specific surface is large, and mass transfer effect is superior, throughput is large, resistance is little, pressure drop is low.
As preferably, on described dehydrating tower, also be provided with steam blowing equipment.Steam blowing equipment is removed carbon powder dust and other impurity of filling surface in the dehydrating tower, guarantees filler heat and mass effect.
As preferably, between dehydrating tower and carbon black tail gas booster fan, be provided with the electric water gate sealing valve.During the exhaust gas processing device fault, the electric water gate sealing valve cuts off tail gas automatically, guarantees whole exhaust system safety.
As preferably, between dehydrating tower and dehydration tail-gas blower fan, cyclone separator is set, can further remove water droplet and dust in the carbon black tail gas, further improved the carbon black tail gas quality.
As preferably: described dehydration tail-gas blower fan adopts roots blower.
Two of goal of the invention of the present invention is, improve said apparatus and carry out the method that carbon black tail gas is processed, the technical scheme that adopts is: the carbon black tail gas inlet pressure of control dehydrating tower is 2.5～3.5kPa, the carbon black tail gas outlet pressure of dehydrating tower is 0.5～1.5kPa, 35～45 ℃ of the carbon black tail gas outlet temperatures of dehydrating tower, 29～33 ℃ of feeding spraying pump outlet temperatures, feeding spraying pump outlet pressure 0.3～0.4MPa, 38～42 ℃ of dehydrating tower leaving water temperatures, dehydrating tower liquid level 1400～1600mm, exhaust flow 30000～50000 Nm
3/ h.Control by above major parameter makes carbon black tail gas enter another hypersaturated state (35～45 ℃ of carbon black tail gas temperature) from a hypersaturated state (200～220 ℃ of carbon black tail gas temperature), steam in the tail gas begins to separate liquefy water with the form of dew point from carbon black tail gas, and carbon black tail gas obtains dewatered clean.
Three of goal of the invention of the present invention is, improves the application of said apparatus and method, and the technical scheme of employing is: treated tail gas passes into the coke oven device as coke oven fuel.
As preferably, also set gradually gas holder and row pressure machine in dehydration tail-gas blower fan back during treated carbon black tail gas, the outlet of row pressure machine and coke oven device.Arranging of gas holder mainly is to guarantee the stable supply of tail gas, reduces the air feed fluctuation, and row pressure organizational security card tail gas discharge pressure is stable, guarantees that coke oven combustion is stable, improves combustion thermal efficiency.
As preferably, between described dehydration tail-gas blower fan and gas holder, also be provided with water seal, can discharge like this condensed water in the exhaust pipe, guarantee simultaneously tail gas induction system safety.
In sum, owing to adopted technique scheme, the invention has the beneficial effects as follows: carbon black tail gas treatment technology and the equipment of the present invention's exploitation, can effectively remove the large quantity of moisture in the carbon black tail gas, improve the calorific value of carbon black tail gas, and reduce the tail gas dew point, and alleviating the corrosion to equipment, application is more extensive.The technology of the present invention has also removed the harmful substances such as carbon powder dust, has improved the quality of carbon black tail gas, meets the energy-saving and emission-reduction of country, the industrial policy of developing a circular economy, and economic benefit and social benefit are remarkable.
The firing tunnel in coking furnace that the present invention will dewater, carbon black tail gas is replaced coke oven after the purified treatment, burning dehydration carbon black tail gas heats coke oven.The high heating value firing tunnel in coking furnace of replacing out supplies the city outward, reaches the effective and recycling of resource.
Device of the present invention and technique have the advantages such as disposal ability is large, energy-saving and cost-reducing, the device continuous and steady operation cycle is long.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Mark among the figure: 1 is dehydrating tower; 2 is gas initial distribution device; 3 is gas-liquid distributor; 4 is liquid distribution trough; 5 is demister; 6 is cyclone separator; 7 is feeding spraying pump; 8 is the carbon black tail gas booster fan; 9 is roots blower; 10 is steam blowing equipment; 11 is circulating water cooling system; 12 are water seal; 13 is gas holder; 14 are the row pressure machine; 15 is the coke oven device.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Embodiment 1:
As shown in Figure 1, a kind of carbon black tail gas dewater unit, set gradually carbon black tail gas booster fan 8, dehydrating tower 1, cyclone separator 6, roots blower 9, water seal 12, gas holder 13, row pressure machine 14 and coke oven device 15 by the exhaust gas flow direction, set gradually feeding spraying pump 7, liquid distribution trough 4, gas-liquid distributor 3, circulating water cooling system 11 by the water flow direction, comprise successively from top to bottom demister 5, liquid distribution trough 4, gas-liquid distributor 3 and gas initial distribution device 2 in the dehydrating tower 1; Carbon black tail gas booster fan 8 links to each other with the gas initial distribution device 2 of dehydrating tower 1 bottom, feeding spraying pump 7 links to each other with liquid distribution trough 4, circulating water cooling system 11 comprises cooling tower and cooling bay, the entrance point of cooling tower links to each other with the dehydrating tower bottom, the port of export of cooling tower links to each other with cooling bay, cooling bay links to each other with feeding spraying pump 7 again, recirculated cooling water is delivered to carbon black tail gas dehydrating tower 1 top by spray-pond cooler and is sprayed into after atomizing after feeding spraying pump 7 pressurizations, after shower water and carbon black tail gas mass transfer and the heat transfer, temperature raises, and enters through dehydrating tower 1 bottom to recycle after cooling tower is pooled to the cooling bay cooling.
Embodiment 2
A kind of carbon black tail gas processing method and technique for applying comprise following key step:
(1) opens carbon black tail gas booster fan 8 and feeding spraying pump 7, the high temperature carbon black tail gas carries out heat and mass by gas initial distribution device 2 and the shower water that distributes through liquid distribution trough 4, carbon black tail gas enters cyclone separator 6 through demister 5 after the dehydration, the carbon black tail gas inlet pressure of dehydrating tower is 2.5kPa, the carbon black tail gas outlet pressure of dehydrating tower is 0.5kPa, 29 ℃ of feeding spraying pump outlet temperatures, feeding spraying pump outlet pressure 0.3MPa, 38 ℃ of dehydrating tower leaving water temperatures, dehydrating tower liquid level 1400mm;
(2) start cyclone separator 6, get rid of carbon powder dust and water droplet;
(3) adjust shower water flow, pressure and exhaust flow, pressure, dehydrating tower 1 outlet exhaust temperature is controlled at about 45 ℃;
(4) start roots blower 9, carbon black tail gas is delivered to gas holder 13 after the dehydration, and by roots blower 9 control tail gas discharge pressures, assurance tail gas is stable to be carried;
(5) start gas row pressure machine 14 carbon black tail gas that will dewater and deliver to coke oven device 15 as coke oven fuel, displace high heating value coke oven firing tunnel in coking furnace;
(low heat value is about 1200kcal/Nm for dehydration carbon black tail gas and producer gas
3) the blending burning; Utilize carbon black tail gas that firing tunnel in coking furnace is carried out peak regulation, be conducive to coke quality steady;
The carbon black tail gas of present embodiment is soft carbon tail gas, and treating capacity is 30000Nm
3/ h, the carbon black tail gas low heat value is about 540～630kcal/Nm before the dehydration
3(the carbon black tail gas low heat value is different and different with the soft carbon kind of producing); The carbon black tail gas low heat value is about 910～970kcal/Nm after the dehydration
3
Embodiment 3
A kind of carbon black dewatering process comprises following key step:
(1) opens carbon black tail gas booster fan 8 and feeding spraying pump 7, the high temperature carbon black tail gas carries out heat and mass by gas initial distribution device 2 and the shower water that distributes through feed liquor distribution apparatus 4, carbon black tail gas enters cyclone separator 6 through demister 5 after the dehydration, the carbon black tail gas inlet pressure of dehydrating tower is 3.5kPa, the carbon black tail gas outlet pressure of dehydrating tower is 1.5kPa, 33 ℃ of feeding spraying pump outlet temperatures, feeding spraying pump outlet pressure 0.4MPa, 42 ℃ of dehydrating tower leaving water temperatures, dehydrating tower liquid level 1600mm;
(2) start cyclone separator 6, get rid of carbon powder dust and water droplet;
(3) adjust shower water flow, pressure and exhaust flow, pressure, dehydrating tower 1 outlet exhaust temperature is controlled at about 35 ℃;
(4) start roots blower 9, carbon black tail gas is delivered to gas holder 13 after the dehydration, and by roots blower 9 control tail gas discharge pressures, assurance tail gas is stable to be carried;
(5) start gas row pressure machine 14 carbon black tail gas that will dewater and deliver to coke oven device 15 as coke oven fuel, displace high heating value coke oven firing tunnel in coking furnace;
(low heat value is about 4000kcal/Nm to the dehydration carbon black tail gas with a small amount of firing tunnel in coking furnace
3) the blending burning, utilize carbon black tail gas that firing tunnel in coking furnace is carried out peak regulation, be conducive to coke quality steady;
The carbon black tail gas of present embodiment is hard (carbon) black and soft carbon tail gas gaseous mixture, and treating capacity is 50000Nm
3/ h, the carbon black tail gas low heat value is about 520～610kcal/Nm before the dehydration
3(the carbon black tail gas low heat value is different and different with the kind of carbon black of producing), the carbon black tail gas low heat value is about 910～960kcal/Nm after the dehydration
3
Embodiment 4
(1) opens carbon black tail gas booster fan 8 and feeding spraying pump 7, the high temperature carbon black tail gas carries out heat and mass by gas initial distribution device 2 and the shower water that distributes through feed liquor distribution apparatus 4, carbon black tail gas enters cyclone separator 6 through demister 5 after the dehydration, the carbon black tail gas inlet pressure of dehydrating tower is 3.0kPa, the carbon black tail gas outlet pressure of dehydrating tower is 1.0kPa, 32 ℃ of feeding spraying pump outlet temperatures, feeding spraying pump outlet pressure 0.35MPa, 40 ℃ of dehydrating tower leaving water temperatures, dehydrating tower liquid level 1500mm;
(2) start cyclone separator 6, get rid of carbon powder dust and water droplet;
(3) adjust shower water flow, pressure and exhaust flow, pressure, dehydrating tower 1 outlet exhaust temperature is controlled at about 40 ℃;
(4) start roots blower 9, carbon black tail gas is delivered to gas holder 13 after the dehydration, and by roots blower 9 control tail gas discharge pressures, assurance tail gas is stable to be carried;
(5) start gas row pressure machine 14 carbon black tail gas that will dewater and deliver to coke oven device 15 as coke oven fuel, displace high heating value coke oven firing tunnel in coking furnace;
(low heat value is about 4000kcal/Nm to the dehydration carbon black tail gas with a small amount of firing tunnel in coking furnace
3) the blending burning, utilize carbon black tail gas that firing tunnel in coking furnace is carried out peak regulation, be conducive to coke quality steady;
The carbon black tail gas of present embodiment is hard carbon tail gas, and treating capacity is 40000Nm
3/ h, the carbon black tail gas low heat value is about 510～600kcal/Nm before the dehydration
3(the carbon black tail gas low heat value is different and different with the hard (carbon) black kind of producing), the carbon black tail gas low heat value is about 890～950kcal/Nm after the dehydration
3
Claims (10)
1. carbon black tail gas treating apparatus, it is characterized in that: comprise the carbon black tail gas booster fan, dehydrating tower and the dehydration tail-gas blower fan that connect successively, described carbon black tail gas booster fan links to each other with the dehydrating tower bottom, dehydrating tower top also is connected with feeding spraying pump, the dehydrating tower bottom also is connected with recirculating cooling water system, described circulating water cooling system also is connected with feeding spraying pump, and described dehydrating tower comprises demister, liquid distribution trough, gas-liquid distributor and gas initial distribution device from top to bottom successively.
2. described carbon black tail gas treating apparatus according to claim 1 is characterized in that: the lightweight structured packing is set in described dehydrating tower.
3. described carbon black tail gas treating apparatus according to claim 1 is characterized in that: also be provided with steam blowing equipment on described dehydrating tower.
4. described carbon black tail gas treating apparatus according to claim 1 is characterized in that: be provided with the electric water gate sealing valve between dehydrating tower and carbon black tail gas booster fan.
5. described carbon black tail gas treating apparatus according to claim 1 is characterized in that: between dehydrating tower and dehydration tail-gas cyclone separator is set.
6. described carbon black tail gas treating apparatus according to claim 1, it is characterized in that: described dehydration tail-gas blower fan is roots blower.
7. adopt the device of claim 1-6 any one to carry out the method that carbon black tail gas is processed, it is characterized in that: the carbon black tail gas inlet pressure of control dehydrating tower is 2.5～3.5kPa, the carbon black tail gas outlet pressure of dehydrating tower is 0.5～1.5kPa, 35～45 ℃ of the carbon black tail gas outlet temperatures of dehydrating tower, 29～33 ℃ of feeding spraying pump outlet temperatures, feeding spraying pump outlet pressure 0.3～0.4MPa, 38～42 ℃ of dehydrating tower leaving water temperatures, dehydrating tower liquid level 1400～1600mm.
8. the application of the tail gas after method claimed in claim 7 is processed, it is characterized in that: treated tail gas passes into the coke oven device as coke oven fuel.
9. application claimed in claim 8 is characterized in that: also set gradually gas holder and row pressure machine in dehydration tail-gas blower fan back during treated carbon black tail gas, the outlet of row pressure machine and coke oven device.
10. application according to claim 9 is characterized in that: also be provided with water seal between described dehydration tail-gas blower fan and gas holder.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624018A (en) * | 2015-02-04 | 2015-05-20 | 青岛黑猫炭黑科技有限责任公司 | Method for separating and comprehensively utilizing gases in carbon black tail gas and device for realizing method |
| CN105597501A (en) * | 2016-01-04 | 2016-05-25 | 中橡集团炭黑工业研究设计院 | Method for exhaust gas desulfurization and denitration in carbon black production process |
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| US4404171A (en) * | 1980-10-28 | 1983-09-13 | Kureha Kagaku Kogyo Kabushiki Kaisha | Tower for drying gaseous chlorine |
| CN2465135Y (en) * | 2001-02-19 | 2001-12-12 | 唐大勇 | Evaporation type condenser |
| CN102229806A (en) * | 2011-05-24 | 2011-11-02 | 金能科技有限责任公司 | Green circular economy technology with coal coking as the main part |
| CN102688663A (en) * | 2012-06-14 | 2012-09-26 | 华电重工股份有限公司 | Method and device for recycling steam in coal drying waste wet gas |
| CN203108399U (en) * | 2013-01-05 | 2013-08-07 | 中橡集团炭黑工业研究设计院 | Carbon black tail gas treatment device |
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2013
- 2013-01-05 CN CN201310001685.7A patent/CN103007696B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4404171A (en) * | 1980-10-28 | 1983-09-13 | Kureha Kagaku Kogyo Kabushiki Kaisha | Tower for drying gaseous chlorine |
| CN2465135Y (en) * | 2001-02-19 | 2001-12-12 | 唐大勇 | Evaporation type condenser |
| CN102229806A (en) * | 2011-05-24 | 2011-11-02 | 金能科技有限责任公司 | Green circular economy technology with coal coking as the main part |
| CN102688663A (en) * | 2012-06-14 | 2012-09-26 | 华电重工股份有限公司 | Method and device for recycling steam in coal drying waste wet gas |
| CN203108399U (en) * | 2013-01-05 | 2013-08-07 | 中橡集团炭黑工业研究设计院 | Carbon black tail gas treatment device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624018A (en) * | 2015-02-04 | 2015-05-20 | 青岛黑猫炭黑科技有限责任公司 | Method for separating and comprehensively utilizing gases in carbon black tail gas and device for realizing method |
| CN105597501A (en) * | 2016-01-04 | 2016-05-25 | 中橡集团炭黑工业研究设计院 | Method for exhaust gas desulfurization and denitration in carbon black production process |
| CN105597501B (en) * | 2016-01-04 | 2019-01-01 | 中橡集团炭黑工业研究设计院 | A kind of method of exhuast gas desulfurization, denitration in carbon black process |
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Address after: 643000 Zigong city of Sichuan Province, Ziliujing District Hing Road No. 168 Patentee after: Hao Yuan black Research & Design Institute of Chemical Industry Co. Ltd. Address before: 643000, 568, Hui Xing Road, Huili Eastern Road, Sichuan, Zigong Patentee before: China Rubber Group Carbon Black Research & Design Institute |