CN204644309U - The device that steam negative pressure benzene removal method uses - Google Patents
The device that steam negative pressure benzene removal method uses Download PDFInfo
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- CN204644309U CN204644309U CN201520301931.5U CN201520301931U CN204644309U CN 204644309 U CN204644309 U CN 204644309U CN 201520301931 U CN201520301931 U CN 201520301931U CN 204644309 U CN204644309 U CN 204644309U
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Abstract
The device that steam negative pressure benzene removal method uses, belong to coal chemical technology, comprise the condensate cooler (1) be connected with debenzolizing tower by pipeline, vacuum tank (2), vacuum pump (3) and water-and-oil separator (4), the lower sides of described condensate cooler (1) establishes non-condensable gas output terminal (5) to be connected with described vacuum tank (2) lower sides by pipeline, vacuum tank (2) top establishes vacuum tank output terminal (6) to be connected with described vacuum pump (3) by pipeline, the output terminal (7) of vacuum pump (3) and suction gas line or before washing benzene tower gas line be connected, condensate cooler (1) and the bottom of vacuum tank (2) are respectively equipped with output terminal (7) and are connected with the input terminus (8) of described water-and-oil separator (4) by pipeline.Realize negative pressure low temperature by this device and take off benzene, there is the advantage that energy consumption is low, steam consumption is low, separation wastewater treatment expense is low, oil washing consumption is low.
Description
Technical field
The utility model belongs to coal chemical technology, be specifically related to a kind of method and device of steam negative pressure benzene removal, be applicable to coke-oven plant's coke-oven gas crude benzol recovery, mainly in order to reduce de-benzene vapour consumption, improve crude benzol yield, reduce the processing cost of oil washing consumption and Separation of Water.
Background technology
Coke-oven plant reclaims crude benzol from coal gas through washing benzene washing benzene tower, will generate rich oil, and rich oil sends into debenzolizing tower after revivifier is warmed up to 170 ~ 180 DEG C, and to take off benzene Heat of Formation oil-poor, enters again and wash the working cycle that benzene washed by benzene tower after hot oil-poor cooling.Traditional diamond heating rich oil malleation de-benzene process, in order to crude benzol fully being distilled from rich oil, reaches required de-benzene effect, throttle flow need be strengthened as far as possible, improve tower top temperature, general tower top temperature 88 ~ 94 DEG C, tower top pressure 10 ~ 20kpa, steam consumption can reach 1 ~ 2 ton of/ton of benzene.At temperature high like this and such quantity of steam effect, the loss of washing oil light component increases, and relative molecular weight increases, and debase, declines to the receptivity of crude benzol, affect crude benzol seed output and quality.Quantity of steam strengthens, and the separation water yield is increased, and cost of sewage disposal increases.The producer that has now adopt without steam negative pressure benzene removal technique, although tower pressure drop is to-30 ~-50kpa, tower top temperature drops to 50 ~ 60 DEG C, but owing to reaching about 300 DEG C by regenerator column diamond heating high temperature washing oil, for regenerator column regenerating wash oil provides thermal source, oil-poor diamond heating heat is oil-poor to 220 ~ 245 DEG C, thermal source is provided for debenzolizing tower takes off benzene, washing oil temperature is far away higher than 180 DEG C of normal pressure or steam negative pressure, coal gas oil washing consumption is high, washing oil Pintsch process is serious, low-voltage high-temperature makes regenerator column head temperature reach 240 ~ 250 DEG C, make to sink to the naphthalene at the bottom of tower, acenaphthene, dibenzofuran, the high molecular polymers such as fluorenes are steamed with gas phase to oil-poor system by steam, and gather for a long time, cause circulating washing oil quality aging seriously sticky, mobility reduces, by pump delivery difficulty, block oil-poor water cooler, being deposited on to wash in benzene tower packing causes tower resistance high.And higher at the improvement cost of production coke-oven plant, complex process, bad operation controls.
Summary of the invention
Technical problem to be solved in the utility model is: for the problems referred to above, provides the device that a kind of steam negative pressure benzene removal method uses.
Technical solution of the present utility model is: the device that steam negative pressure benzene removal method uses, comprise the condensate cooler be connected with debenzolizing tower by pipeline, vacuum tank, vacuum pump and water-and-oil separator, the lower sides of described condensate cooler establishes non-condensable gas output terminal to be connected with described vacuum tank lower sides by pipeline, vacuum tank top establishes vacuum tank output terminal to be connected with described vacuum pump by pipeline, vacuum delivery side of pump with suction gas line or before washing benzene tower gas line be connected, condensate cooler and the bottom of vacuum tank are respectively equipped with output terminal and are connected by the input terminus of pipeline with described water-and-oil separator.
Technique effect of the present utility model is: realize negative pressure low temperature by this device and take off benzene, has the advantage that energy consumption is low, steam consumption is low, separation wastewater treatment expense is low, oil washing consumption is low.Reduce washing oil and take off benzene temperature, greatly can reduce the polymerization of washing oil Pintsch process, washing oil quality is good, stable, consumes low.Vertical oilless vacuum pump, without circulation fluid, is avoided noncondensable gas to be dissolved in circulation fluid (water) and is caused secondary pollution, optimizes on-the-spot operating environment.Non-condensable gas (not having the mixed gas such as water, benzene, unsaturated compound liquefied in condensate cooler), not lime set (liquid of the composition such as water, benzene, unsaturated compound) return systemic circulation and reclaim, improve product yield, avoid the pollution of environment.
Although the utility model still adopts superheated vapour to provide thermal source for washing oil takes off benzene, but because rich oil temperature still controls at 170 ~ 180 DEG C, debenzolizing tower tower top pressure drops to-34 ~-40kpa, tower top temperature drops to 60 ~ 70 DEG C, steam consumption quantity is reduced to 0.5 ~ 1 ton of/ton of benzene greatly, the processing cost of Separation of Water is made to also reduce 50% than positive pressure-off benzene, owing to being de-benzene under negative pressure, reduce the pressure on rich oil surface in tower, crude benzene vapor gaseous phase partial pressure in tower reduces, parsing power increases, crude benzol boiling point lowering, crude benzol is made to be resolved fully under lower temperature condition, oil-poor low containing benzene, washing benzene effect might as well.And low temperature environment can reduce the cracking of washing oil, the cutting out with crude benzol of polymerization and light component greatly, circulating washing oil quality is good, stable, good fluidity, avoids without steam negative pressure benzene removal washing oil high temperature ageing soon, the problem of occluding device.Not lime set oil return water separator, before non-condensable gas back scrubbing benzene tower, gas line washes benzene again, the optimum closed circulation of system, optimizes execute-in-place environment, also can improve crude benzol recovery rate.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, the device that steam negative pressure benzene removal method uses, comprise the condensate cooler 1 be connected with debenzolizing tower by pipeline, vacuum tank 2, vacuum pump 3 and water-and-oil separator 4, the lower sides of described condensate cooler 1 establishes non-condensable gas output terminal 5 to be connected with described vacuum tank 2 lower sides by pipeline, vacuum tank 2 top establishes vacuum tank output terminal 6 to be connected with described vacuum pump 3 by pipeline, the output terminal 7 of vacuum pump 3 and suction gas line or before washing benzene tower gas line be connected, condensate cooler 1 and the bottom of vacuum tank 2 are respectively equipped with output terminal 7 and are connected by the input terminus 8 of pipeline with described water-and-oil separator 4.Water-and-oil separator 4 is connected with water management cylinder 9 and reflux column 10 respectively by pipeline.
Described vacuum pump 3 is vertical oilless vacuum pump.
Output terminal 8 bottom described condensate cooler 1 and vacuum tank 2 is not less than 5 meters with the liquid level difference of described water-and-oil separator 4.Liquid in condensate cooler and vacuum tank enters water-and-oil separator by gravity flow, to make the pressure remained steady in debenzolizing tower.
Steam negative pressure benzene removal method, rich oil temperature controls at 170 ~ 180 DEG C, vacuum extractor is utilized to extract non-condensable gases in the condensate cooler be connected with debenzolizing tower out, reduce debenzolizing tower internal gas pressure, debenzolizing tower tower top pressure is made to keep-34 ~-40kpa, de-benzene under temperature 60 ~ 70 DEG C of states, steam consumption quantity 0.5 ~ 1 ton of/ton of benzene.
Vacuum tank import connects the outlet of condensate cooler non-condensable gas, and outlet connects the import of vacuum pump, the non-condensable gas resorption gas line of vacuum pump outlet or gas line before washing benzene tower, not lime set oil return water separator bottom vacuum tank.Vacuum tank packing layer (can gather materials on the spot in factory by filler, ceramic honey comb or light pottery rotate Polydentate ring packing) portion on the lower side non-condensable gas import is connected with the outlet of the non-condensable gas of condensate cooler, the outlet of vacuum tank non-condensable gas connects vacuum pump import, open vacuum pump, extract the non-condensable gas of condensate cooler out, make revivifier, debenzolizing tower, condensate cooler be in subnormal ambient, vacuum pump outlet non-condensable gas enters gas line, not lime set oil return water separator bottom vacuum tank.
Principle of work: utilize the non-condensable gases in vacuum pump extraction condensate cooler, reduce debenzolizing tower internal gas pressure, reach the negative pressure state much smaller than ambient pressure, make debenzolizing tower de-benzene under negative pressure state, non-condensable gas and non-lime set are extracted out into vacuum tank by vacuum pump, gas is up fully contacts liquefaction with filler in vacuum tank, the non-condensable gas that can not liquefy is extracted out by vacuum tank top and is entered vertical oilless vacuum pump, be pressed into by vacuum pump outlet and inhale gas line or gas line before washing benzene tower, return system recycling again, the not solidifying direct oil-feed water separator of liquid self-flowing.
Claims (3)
1. the device of steam negative pressure benzene removal method use, comprise the condensate cooler (1) be connected with debenzolizing tower by pipeline, vacuum tank (2), vacuum pump (3) and water-and-oil separator (4), it is characterized in that, the lower sides of described condensate cooler (1) establishes non-condensable gas output terminal (5) to be connected with described vacuum tank (2) lower sides by pipeline, vacuum tank (2) top establishes vacuum tank output terminal (6) to be connected with described vacuum pump (3) by pipeline, the output terminal (7) of vacuum pump (3) and suction gas line or before washing benzene tower gas line be connected, condensate cooler (1) and the bottom of vacuum tank (2) are respectively equipped with output terminal (7) and are connected with the input terminus (8) of described water-and-oil separator (4) by pipeline.
2. the device of steam negative pressure benzene removal method use as claimed in claim 1, it is characterized in that, described vacuum pump (3) is vertical oilless vacuum pump.
3. the device of steam negative pressure benzene removal method use as claimed in claim 1, is characterized in that, the output terminal (7) of described condensate cooler (1) and vacuum tank (2) bottom is not less than 5 meters with the liquid level difference of described water-and-oil separator (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520301931.5U CN204644309U (en) | 2015-05-12 | 2015-05-12 | The device that steam negative pressure benzene removal method uses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520301931.5U CN204644309U (en) | 2015-05-12 | 2015-05-12 | The device that steam negative pressure benzene removal method uses |
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| Publication Number | Publication Date |
|---|---|
| CN204644309U true CN204644309U (en) | 2015-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520301931.5U Expired - Fee Related CN204644309U (en) | 2015-05-12 | 2015-05-12 | The device that steam negative pressure benzene removal method uses |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109777522A (en) * | 2019-03-08 | 2019-05-21 | 临涣焦化股份有限公司 | Half negative pressure benzene removal device of coking of coal |
| CN113020228A (en) * | 2021-04-15 | 2021-06-25 | 新余钢铁股份有限公司 | Benzene tank bottom residue treatment system and treatment process |
-
2015
- 2015-05-12 CN CN201520301931.5U patent/CN204644309U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109777522A (en) * | 2019-03-08 | 2019-05-21 | 临涣焦化股份有限公司 | Half negative pressure benzene removal device of coking of coal |
| CN113020228A (en) * | 2021-04-15 | 2021-06-25 | 新余钢铁股份有限公司 | Benzene tank bottom residue treatment system and treatment process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150916 Termination date: 20180512 |
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| CF01 | Termination of patent right due to non-payment of annual fee |