CN103820139A - Method for demulsifying tar - Google Patents
Method for demulsifying tar Download PDFInfo
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- CN103820139A CN103820139A CN201410117122.9A CN201410117122A CN103820139A CN 103820139 A CN103820139 A CN 103820139A CN 201410117122 A CN201410117122 A CN 201410117122A CN 103820139 A CN103820139 A CN 103820139A
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Abstract
The invention discloses a method for demulsifying tar. The method is characterized by comprising the following steps: pressing emulsified tar in a 1# tar tank into a phenol water tank by a liquid level difference; introducing compressed air to stir wind inside the phenol water tank, so that water-tar separation of the emulsified tar is realized under a high-strength mixing effect; then heating, standing and dewatering, and settling the tar and water by virtue of gravity, wherein the tar is at the bottom and the water is at the top; feeding the tar to a 2# tar tank by virtue of a tar delivery pump; finally, dewatering and deslagging by virtue of a super centrifugal machine. The invention aims at providing a tar demulsifying method capable of efficiently and quickly solving the demulsification problem of the emulsified tar without spending a lot of money and additionally arranging the novel equipment, ensuring the smooth production of a tar system and providing tar with relatively low moisture content for production.
Description
Technical field
The present invention relates to a kind of method of processing emulsification tar, this technology belongs to coking production field, is mainly used in the breaking emulsion and dewatering processing to coking by-products-coal tar.
Background technology
NeiMenggu BaoGang GangLian Co., Ltd. Coking Factory has 10 coke ovens, produce coke per year more than 4,500,000 tons, have three gas cleaning systems, gas treatment 230,000 is vertical/hour, the tar system of processing in corresponding 150,000 tons of supporting tar/years formally came into operation in May, 2007, mainly bearing the processing and refining task of coke-oven plant's byproduct, main products has nearly 10 kinds of products such as light oil, washing oil, carbolineum, carbolic oil, pitch, NAPTHALENE FLAKES. (INDUSTRIAL GRADE）, crude phenols, every year for coke-oven plant creates high economic benefit.
Coal tar is the chocolate that obtains in destructive distillation and gasification of coal, thick oily liquid, and its composition and physical properties fluctuation range are larger, depends primarily on that coking coal forms and the processing condition of coking operation.Coal tar is separated from raw gas, and the method for employing is to spray and make its cooling condensation at coke oven collecting main place cyclic ammonia water, what in primary cooler, further condensing cooling was reclaimed again, therefore contain a large amount of water and bits.Coal tar carries out processing and refining through the clarification of gas purification portion and the standing refining portion of by-product that is sent to of heating, and the phenol water that standing separation goes out sends back to gas purification portion ammonia steaming system and carries out ammonia still process processing.
Requirement in technique, tar is moisture must be controlled at below 4%, and toluene insolubles content is more than 3.5%.But in recent years, due to the variation of coking coal proportioning, coal tar also has a very large change on composition, be mainly manifested in the many aspects such as tar proportion declines, toluene insolubles content reduces, tar is moisture greatly, oil-water emulsion, the increase of tar bits content, this has brought very large impact to production of the new tar system in coke-oven plant.Its coal-tar middle oil emulsification problem solves particularly difficulty in process of production.
Tar emulsification is on the impact of producing
1, tar emulsification directly affects tar preliminary hydro-extraction and ultracentrifuge centrifuge dehydration, causes very large difficulty to subsequent production.
2, tar emulsification, cause tar with phenol shipwreck to separate, affect ultracentrifuge dehydrating effect and whizzer dnockout amount.
3, tar emulsification, causes ultracentrifuge moment of torsion to increase, and dehydrating effect obviously declines, and dehydrated tar is moisture higher, carries tar secretly, water is more in coke tar refuse.
The refining portion of by-product tar, phenol water storage condition:
Tar tank is four 5000 vertical tar vats (DN23000mm, H=12000mm), and two of initial design are tar Receiving bin, mainly receives the tar that gas cleaning system is come; One is ultracentrifuge dnockout groove, is mainly ultracentrifuge qualified raw material is provided; One is anhydrous tar groove, and the main tar receiving after the de-slag of ultracentrifuge dehydration is the raw material of tar distillation system supply high-quality.After tar emulsification, water cannot be separated, and after long-play, is often close on the tar generation emulsification of more than 3000 ton.
Phenol tank is mainly used in receiving the phenol water that separate at tar groove top, sends gas purification portion system back to carry out ammonia still process processing by phenol water pump.
Process at present the method for tar emulsification and the problem of existence
1) heating, standing separation: the oily water separation in emulsification tar is not had to positive effect.
2) whizzer break milk separation: obvious to tar demulsification, but in breakdown of emulsion process, need to carry out internal recycle, not only increased energy consumption, and in breakdown of emulsion process to ultracentrifuge well damage.
3) emulsion splitter breakdown of emulsion: moisture while being greater than 10% demulsification be not clearly, and emulsion splitter price is higher, adds emulsion splitter to increase to a certain extent tar tooling cost.
4) tar vat mechanical stirring breakdown of emulsion.Existing tar vat is the equipment of reusing, and for guaranteeing safety, can not carry out direct mechanical and stir wind.
Summary of the invention
The object of this invention is to provide one do not need to drop into substantial contribution and increase new installation just can efficiently solve fast emulsification tar breakdown of emulsion problem, can guarantee tar system production direct motion, for producing the method for a kind of tar breakdown of emulsion that relatively moisture little tar is provided.
The technical solution adopted for the present invention to solve the technical problems is:
Utilize existing DN7000mm, the phenol tank of H=6965mm, by liquid level difference, the tar that in tar vat is mainly emulsifying part is pressed in phenol tank, in phenol tank, pass into pressurized air and stir wind, make emulsification tar under high strength stirring action, realize water and burnt oil separating, then heat, leave standstill dehydration, tar and water pass through gravity settling, tar below, water in the above, now by tar transferpump, tar is sent in tar vat again, finally by the ultracentrifuge de-slag that dewaters.
Be further elaborated with regard to technical scheme of the present invention below:
A method for tar breakdown of emulsion, is characterized in that:
The equipment that described breaking method uses is as follows:
1 ﹟ tar groove 2 belows approach position, earth's surface has pipeline A16 to be connected with phenol tank 6, on pipeline A16, be respectively equipped with tar groove outlet valve 7, phenol tank outlet valve 8, phenol water transport pipe B17 is also connected with pipeline A16 respectively with the tar transport pipe C18 after breakdown of emulsion, on tar transport pipe C18 after phenol water transport pipe B17 and breakdown of emulsion, be respectively equipped with phenol water transferpump 11 and tar transferpump 12 and valve, the top of 1# tar groove 2 is provided with tar groove dewatering outlet 3, below the inside of phenol tank 6, there is phenol tank well heater 10, phenol sink top is installed blowpipe 9, blowpipe 9 passes into phenol bottom of gullet always, and have with bottom the distance that is no less than 500mm.
Described breaking method is as follows:
(1) slowly open tar outlet valve 7 and phenol tank outlet valve 8, make emulsification tar enter phenol tank 6 by pressure difference from pipeline A16; Observe phenol tank 6 liquid levels by the remote transmission instrument on phenol tank 6, now require the tar liquid level that enters phenol tank to keep its vertical height 500-1000mm apart from phenol sink top;
(2) close tar groove outlet valve 7 and phenol tank outlet valve 8, slowly open the inlet valve of compressed air pipe 9, pass into pressurized air to phenol tank 6, pressure is at 0.25～0.4MPa, fully stir 2～4 hours, then open phenol tank heater heats to 85～95 ℃, leave standstill 24～48 hours, tar is separated with phenol water;
(3) open phenol tank outlet valve 8, open the entry and exit valve of tar transferpump 12, open tar transferpump 12, the tar of separating is sent into 2# tar groove 14;
(4) observe at any time the pressure of tar transferpump 12, pressure-stabilisation is between 0.5-0.6 Mpa, when pressure exceedes 0.6Mpa or hears that tar transferpump 12 vibrates when larger, illustrate that burnt Water in oil is large, now close tar transferpump 12, repeating step (2) operation again, makes emulsification tar continue oily water separation;
(5) open entrance, the outlet valve of phenol water transferpump 11, open phenol water transferpump 11, the phenol water of phenol tank 6 is sent to gas purification portion mechanical settling tank, carry out follow-up ammonia still process operation.
The invention has the beneficial effects as follows:
1, eliminated the impact of tar emulsification on Tar production.Nearly 3000 tons of emulsification tar in the initial tar vat of NeiMenggu BaoGang GangLian Co., Ltd. Coking Factory, because tar is moisture higher, ultracentrifuge cannot be processed at all.Implement after method of the present invention, by stirring after wind breakdown of emulsion, this part tar water is reduced to below 4%, can be directly with the ultracentrifuge de-slag that dewaters, then send into tar distillation system and carry out processing and refining, realized continuous production.
2, by tar is stirred to wind, improve the mixed matter of tar, effectively reduce the sedimentation velocity of the coke tar refuse of tar vat, reduce the deposition of the coke tar refuse of tar vat.
3, according to measuring and calculating, process 1 ton of tar, can create more than 200 yuan of economic benefit more, calculate like this, 3000 tons, the emulsification tar of the moisture 30-50% of annual hypothesis processing, will create 20 to 300,000 yuan of economic benefits for 1 year more.
Accompanying drawing explanation
Fig. 1 is emulsion breaking device schematic diagram of the present invention;
Wherein: the burnt oil tank heater of 1-1#, 2-1# tar groove, 3-1# tar groove dewatering outlet, 4-phenol waterpipe, 5-2# tar groove dewatering outlet, 6-phenol tank, 7-1# tar groove valve, 8-phenol tank outlet valve, 9-compressed air pipe, 10-phenol tank well heater, 11-phenol water transferpump, 12-tar transferpump, 13-tar inlet tube, 14-2# tar groove, the burnt oil tank heater of 15-2#, 16-pipeline A, 17-pipeline B, 18-pipeline C.
Specific embodiments:
Embodiment 1:
A method for tar breakdown of emulsion, is characterized in that:
The equipment that described breaking method uses is as follows:
1 ﹟ tar groove 2 belows approach position, earth's surface has pipeline A16 to be connected with phenol tank 6, on pipeline A16, be respectively equipped with tar groove valve 7, phenol tank valve 8, phenol water transport pipe B17 is also connected with pipeline A respectively with the tar transport pipe C18 after breakdown of emulsion, on tar transport pipe C18 after phenol water transport pipe B17 and breakdown of emulsion, be respectively equipped with phenol water transferpump 11 and tar transferpump 12 and valve, the top of 1# tar groove 2 is provided with tar groove dewatering outlet 3, below the inside of phenol tank 6, there is phenol tank well heater 10, phenol sink top is installed blowpipe 9, blowpipe 9 passes into phenol bottom of gullet always, and have with bottom the distance that is no less than 500mm.
The step of described breaking method is as follows:
(a) slowly open tar outlet valve 7 and phenol tank outlet valve 8, make emulsification tar enter phenol tank 6 by pressure difference from pipeline A16; Observe phenol tank 6 liquid levels by the remote transmission instrument on phenol tank 6, now require the tar liquid level that enters phenol tank to keep its vertical height 500-1000mm apart from phenol sink top;
(b) close tar groove outlet valve 7 and phenol tank outlet valve 8, slowly open the inlet valve of compressed air pipe 9, pass into pressurized air to phenol tank 6, pressure is at 0.25～0.4MPa, fully stir 2～4 hours, then open phenol tank heater heats to 85～95 ℃, leave standstill 24～48 hours, tar is separated with phenol water;
(c) open phenol tank outlet valve 8, open the entry and exit valve of tar transferpump 12, open tar transferpump 12, the tar of separating is sent into 2# tar groove 14;
(d) observe at any time the pressure of tar transferpump 12, pressure-stabilisation is between 0.5-0.6 Mpa, when pressure exceedes 0.6Mpa or hears that tar transferpump 12 vibrates when larger, illustrate that burnt Water in oil is large, now close tar transferpump 12, repeating step (2) operation again, makes emulsification tar continue oily water separation;
(e) open entrance, the outlet valve of phenol water transferpump 11, open phenol water transferpump 11, the phenol water of phenol tank 6 is sent to gas purification portion mechanical settling tank, carry out follow-up ammonia still process operation.
The tar of 2# tar groove 14 is by the ultracentrifuge de-slag that dewaters, and after emulsification tar is processed completely, phenol tank 6 continues to receive the phenol water in each tar groove, and from 1# tar groove dewatering outlet 3, entering phenol tank 6 through phenol waterpipe 4 does not affect any production.
2# tar groove is the same with the burnt tank structure of 1#.
Claims (1)
1. a method for tar breakdown of emulsion, is characterized in that:
The equipment that described breaking method uses is as follows:
1 ﹟ tar groove (2) below approaches position, earth's surface has pipeline A (16) to be connected with phenol tank (6), on pipeline A (16), be respectively equipped with tar groove valve (7), phenol tank outlet valve (8), phenol water transport pipe B (17) is also connected with pipeline A respectively with the tar transport pipe C (18) after breakdown of emulsion, on tar transport pipe C (18) after phenol water transport pipe B (17) and breakdown of emulsion, be respectively equipped with phenol water transferpump (11) and tar transferpump (12) and valve, the top of 1# tar groove (2) is provided with tar groove dewatering outlet (3), there is phenol tank well heater (10) below, inside at phenol tank (6), phenol sink top is installed blowpipe (9), blowpipe (9) passes into phenol bottom of gullet always, and have with bottom the distance that is no less than 500mm,
The step of described breaking method is as follows:
(a) slowly open tar outlet valve 7 and phenol tank outlet valve 8, make emulsification tar enter phenol tank 6 by pressure difference from pipeline A16; Observe phenol tank 6 liquid levels by the remote transmission instrument on phenol tank 6, now require the tar liquid level that enters phenol tank to keep its vertical height 500-1000mm apart from phenol sink top;
(b) close tar groove outlet valve 7 and phenol tank outlet valve 8, slowly open the inlet valve of compressed air pipe 9, pass into pressurized air to phenol tank 6, pressure is at 0.25～0.4MPa, fully stir 2～4 hours, then open phenol tank heater heats to 85～95 ℃, leave standstill 24～48 hours, tar is separated with phenol water;
(c) open phenol tank outlet valve 8, open the entry and exit valve of tar transferpump 12, open tar transferpump 12, the tar of separating is sent into 2# tar groove 14;
(d) observe at any time the pressure of tar transferpump 12, pressure-stabilisation is between 0.5-0.6 Mpa, when pressure exceedes 0.6Mpa or hears that tar transferpump 12 vibrates when larger, illustrate that burnt Water in oil is large, now close tar transferpump 12, repeating step (2) operation again, makes emulsification tar continue oily water separation;
(e) open entrance, the outlet valve of phenol water transferpump 11, open phenol water transferpump 11, the phenol water of phenol tank 6 is sent to gas purification portion mechanical settling tank, carry out follow-up ammonia still process operation.
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| CN201410117122.9A CN103820139B (en) | 2014-03-27 | 2014-03-27 | Method for demulsifying tar |
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| CN201410117122.9A CN103820139B (en) | 2014-03-27 | 2014-03-27 | Method for demulsifying tar |
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| CN103820139B CN103820139B (en) | 2017-02-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105295989A (en) * | 2015-11-27 | 2016-02-03 | 煤炭科学技术研究院有限公司 | Dehydrating and desalinizing method of high-temperature coal tar |
| CN112410062A (en) * | 2020-10-29 | 2021-02-26 | 中国林业科学研究院林产化学工业研究所 | Method for continuously removing moisture from biomass pyrolysis tar |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818076A (en) * | 2010-05-07 | 2010-09-01 | 杨东平 | Processing technology for water/ash-containing tar |
| CN202453222U (en) * | 2012-02-15 | 2012-09-26 | 内蒙古包钢钢联股份有限公司 | Experimental device capable of skimming oil automatically after tar demulsification |
-
2014
- 2014-03-27 CN CN201410117122.9A patent/CN103820139B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818076A (en) * | 2010-05-07 | 2010-09-01 | 杨东平 | Processing technology for water/ash-containing tar |
| CN202453222U (en) * | 2012-02-15 | 2012-09-26 | 内蒙古包钢钢联股份有限公司 | Experimental device capable of skimming oil automatically after tar demulsification |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105295989A (en) * | 2015-11-27 | 2016-02-03 | 煤炭科学技术研究院有限公司 | Dehydrating and desalinizing method of high-temperature coal tar |
| CN112410062A (en) * | 2020-10-29 | 2021-02-26 | 中国林业科学研究院林产化学工业研究所 | Method for continuously removing moisture from biomass pyrolysis tar |
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| CN103820139B (en) | 2017-02-15 |
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