CN203486931U - Sewage treatment unit for production of coal chemical industry - Google Patents
Sewage treatment unit for production of coal chemical industry Download PDFInfo
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- CN203486931U CN203486931U CN201320579134.4U CN201320579134U CN203486931U CN 203486931 U CN203486931 U CN 203486931U CN 201320579134 U CN201320579134 U CN 201320579134U CN 203486931 U CN203486931 U CN 203486931U
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Abstract
The utility model provides a sewage treatment unit for production of the coal chemical industry. The sewage treatment unit comprises a sewage pressure pump, a sewage heat exchanger, a high-pressure stripping tower, a alkali preparing trough, an alkaline liquor pump and a water cooler which are connected; the sewage pressure pump is connected to a sewage feeding tube of the coal chemical industry; the sewage feeding tube of the coal chemical industry is connected with the upper part of the body of the high-pressure stripping tower by virtue of the tube pass of the sewage heat exchanger; a kettle pipeline of the high-pressure stripping tower is connected with the shell pass of the sewage heat exchanger, and is then connected with pipelines of a conversion removing limit and a further biochemical treatment limit; the pipelines of the conversion removing limit and the further biochemical treatment limit are connected with the water cooler; the lower part of the body of the high-pressure stripping tower is connected with a middle-pressure steam-gas pipeline; a pipeline on the top of the high-pressure stripping tower is connected with pipelines of a de-gasifier limit and a torch; the upper part of the body of the high-pressure stripping tower is connected with the alkali preparing trough by virtue of the alkaline liquor pump; the alkali preparing trough is connected with an alkaline liquor tank by virtue of a valve; the top of the alkali preparing trough is connected with a water pipe of a boiler, the lower section of the alkali preparing trough is connected with a low-pressure nitrogen pipe. The sewage treatment unit disclosed by the utility model can realize the recycling of pollutants separated from production sewage of the coal chemical industry and comprehensive utilization of treated sewage which is returned to a system.
Description
Technical field
The utility model relates to the processing of Coal Chemical Industry production waste, particularly relates to a kind of purifying treatment unit of conventional coal chemical industry sewage.
Background technology
It is to take coal as raw material that Coal Chemical Industry is produced, and through chemical process, makes it be converted into gas, liquid and solid fuel and chemical, specifically comprises the courses of processing such as coal gasification, liquefaction, destructive distillation.Coal dressing reaction process, due to reaction characteristicses such as pressurization, heating, can produce the coal chemical industry sewage that contains in a large number the impurity such as tar, phenols, benzene class, ammonia in production process.How rationally effectively to process this part sewage, be the thorny problem that Development of Coal chemical industry need to solve.
The processing mode that the sewage treatment process extensively being adopted by coal chemical industry enterprises combines for " physico-chemical pretreatment+biochemical treatment ".Wherein physico-chemical pretreatment partly adopts following flow process: contain the coal chemical industry sewage of the materials such as tar, phenols, benzene class, ammonia after tar separator pre-treatment, with water cooler heat exchange, with the sewage after the oil removing of light oil separator, be mixed into air-floating apparatus, after mixing with additional liquid, enter flocculation tank, the separated of oil and suspended substance carried out in dissolved air flotation pond, through air supporting processed sewage self-flowing to dashpot, send in two medium filters and filter, the sewage after filtration is delivered to gac dephenolize/CLL ammonia recovery process.According to this treatment process, from what we've been able to figure out, some problems below existing in the actual mechanical process of dephenolize/ammonia recovery process.
1, gac dephenolize/CLL ammonia recovery process complicated operation, maintenance cost is high, and from upstream, enters ammonia concentration the sewage of this operation and often fluctuate, and has caused the operational difficulty of this operation.
2,, because ammonia content in coal chemical industry sewage is higher, in conventional treatment process, gac dephenolize/CLL ammonia recovery process is not high for the rate of recovery of ammonia, can not reach design requirements.
3, due to remaining CO
2existence, ammonia and remaining CO that operation reclaims
2there is chemical reaction and generate bicarbonate of ammonia or volatile salt crystallization, be attached on e-quipment and pipe runner, cause the phenomenon of equipment, process pipe obstruction and encrustation serious, seriously restricting the steady running of equipment.
Meanwhile, the sewage of processing through gac dephenolize/CLL ammonia recovery process can not meet the requirement of environment protection.
Summary of the invention
The purpose of this utility model is to provide a kind of Coal Chemical Industry production waste treatment unit, this device discharges volatile matter or the gas dissolved dissolving in Coal Chemical Industry production waste by high pressure stripping, realize the recycling of isolating pollutent and the comprehensive utilization of processing rear sewage retrieval system.
Coal Chemical Industry production waste treatment unit of the present utility model by sewage force (forcing) pump, sewage heat exchanger, high-pressure stripper, join alkali groove, lye pump and water cooler and connect to form.
Wherein, sewage force (forcing) pump is connected on coal chemical industry sewage feed-pipe, and coal chemical industry sewage feed-pipe, by the tube side of sewage heat exchanger, is connected with high-pressure stripper tower body top; High-pressure stripper tower reactor pipeline is connected with the shell side of sewage heat exchanger, then with go to convert battery limit (BL) and be connected with the further pipeline of biochemical treatment battery limit (BL), be connected with water cooler going to convert on the pipeline of battery limit (BL) and further biochemical treatment battery limit (BL).High-pressure stripper tower body bottom is connected with middle pressure superheated vapour pipeline; High-pressure stripper overhead line is connected with removing the pipeline of vapourizing furnace battery limit (BL) and torch.
High-pressure stripper tower body top by lye pump with join alkali groove and be connected, join alkali groove and connect alkali liquid tank by valve.Described top of joining alkali groove is connected with boiler water tube, and hypomere is connected with low pressure nitrogen tracheae.
In said apparatus, the theoretical plate number of described high-pressure stripper is 14-30 piece.
It is thermal source that the utility model said apparatus be take the middle pressure superheated vapour of 360 ℃-420 ℃ of pressure 3.0MPa-4.1MPa, temperature, by entering at the bottom of high-pressure stripper in tower, to entered Coal Chemical Industry production waste adverse current direct heating in tower, that be forced into 3.7MPa-4.4MPa by tower top, parse dissolved gas or volatile substances in Coal Chemical Industry production waste from bottom to top; The Coal Chemical Industry producing after resolving is processed water and is discharged from high-pressure stripper bottom, contain resolve gas saturation steam by tower top discharge.
In said apparatus, middle pressure superheated vapour adverse current direct heating Coal Chemical Industry production waste, when water vapour passes sewage with the form of bubble, between water and bubble surface, form free interface, the dissolved gas such as ammonia or volatile substances are constantly evaporated in bubble, diffusion, when bubble rises to liquid phase surface, starts to break and discharge volatile matter or dissolved gases wherein.After said apparatus is processed, high-pressure stripper tower reactor export coal chemical industry is processed the ammonium nitrogen content≤100mg/L in water, in flow process, carbon dioxide content has dropped to below 10mg/L, the degree of purification of the Coal Chemical Industry production waste on the one hand greatly having improved, on the other hand, the minimizing of carbonic acid gas and ammonia content, greatly reduces the risk that the device structure that occurs because form crystallization stops up, and system operation is more steady.
Waste gas, the refuse by the utility model device mesohigh stripping tower, separated have been accomplished recycle, by high-pressure stripper stripping CO out
2, H
2s, NH
3can return to burning gas making device with some volatile substances, processing water after stripping can be used as recirculated cooling water after further processing on the one hand and oiler feed continues to utilize, also can be used as on the other hand cooling, Quench washing medium retrieval system comprehensive utilization, thereby reduced consumption, environmental protection and energy saving.
Meanwhile, the utility model device flexible operation, before and after keeping for, the turndown ratio of device strengthens.If outer, give cooling, Quench washing device operating mode while there is fluctuation, can adjust its corresponding discharge, remaining flow imports sewage refinement treatment operation; When burning or gasification installation operating mode generation fluctuation, also can adjust stripping separation gas corresponding discharge, remaining flow can be adjusted and go to torch recovery system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model Coal Chemical Industry production waste treatment unit.
In figure: 1. sewage force (forcing) pump; 2. sewage heat exchanger; 3. high-pressure stripper; 4. lye pump; 5. join alkali groove; 6. water cooler; A: Coal Chemical Industry production waste; B: heat exchange, Quench washing device; C: biochemical treatment apparatus; D: burning/gasification installation; E: feedwater; F: alkali liquid tank; J: low-pressure nitrogen; H: middle pressure steam; I: showing tremendous enthusiasm torch pipe network.
Embodiment
Application the utility model Coal Chemical Industry production waste treatment unit is processed the gas liquor that in lurgi gasifier broken coal pressurization gas making device, fixed bed crushed coal pressure gasifying process produces, and below in conjunction with Fig. 1, embodiment is described in detail.
Through Coal Chemical Industry production waste (gas liquor) A that operation is processed, send into coal gas tank above, through sewage force (forcing) pump 1, be forced into 3.7MPa-4.1MPa.Be sent to sewage heat exchanger 2 and be preheating to after 200 ℃-250 ℃, enter high-pressure stripper 3.High-pressure stripper bottom passes into middle pressure steam H, and in tower, stripping goes out the material of the easy volatilies such as ammonia, and the saturation steam after stripping is sent vapourizing furnace D to, as vaporization agent, recycles.When vapourizing furnace cuts out system, the materials such as ammonia that stripping goes out and saturation steam switch to showing tremendous enthusiasm torch pipe network I.
From high-pressure stripper 3 bottoms, discharge except the saturated gas liquor ammonia, through sewage heat exchanger, 2 heat exchange are cooled to after 30 ℃-45 ℃, enter water cooler 6 and be divided into two portions after again cooling: a part goes the heat exchange of crude gas cooling order, Quench washing device B as spraying gas liquor; After another part decompression, be sent to biochemical treatment apparatus C.
Sodium hydroxide solution from the concentration 20%-45% of choline operation adds and joins alkali groove 5 from alkali liquid tank F, then adds feedwater E dilution, and purges from bottom with low-pressure nitrogen J, after alkali lye is fully mixed, by lye pump 4, is sent to high-pressure stripper 3.
By gas liquor through in press stripping to process after, the pH value 8.25 of draining water quality, COD value 774mg/L, CN
-content 0.04mg/L, volatile phenol 83.2mg/L, NH
3-N65mg/L, except can circulation comprehensive recycling to system, its water quality meets the refining biochemical treatment apparatus of follow-up sewage completely for the requirement of entrance gas liquor water quality.
Claims (2)
1. a Coal Chemical Industry production waste treatment unit, by sewage force (forcing) pump, sewage heat exchanger, high-pressure stripper, join alkali groove, lye pump and water cooler and connect to form, sewage force (forcing) pump is connected on coal chemical industry sewage feed-pipe, coal chemical industry sewage feed-pipe, by the tube side of sewage heat exchanger, is connected with high-pressure stripper tower body top; High-pressure stripper tower reactor pipeline is connected with the shell side of sewage heat exchanger, then with go to convert battery limit (BL) and be connected with the further pipeline of biochemical treatment battery limit (BL), be connected with water cooler going to convert on the pipeline of battery limit (BL) and further biochemical treatment battery limit (BL); High-pressure stripper tower body bottom is connected with middle pressure superheated vapour pipeline; High-pressure stripper overhead line is connected with removing the pipeline of vapourizing furnace battery limit (BL) and torch; High-pressure stripper tower body top by lye pump with join alkali groove and be connected, join alkali groove and connect alkali liquid tank by valve; Described top of joining alkali groove is connected with boiler water tube, and hypomere is connected with low pressure nitrogen tracheae.
2. Coal Chemical Industry production waste treatment unit according to claim 1, the theoretical plate number that it is characterized in that described high-pressure stripper is 14-30 piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320579134.4U CN203486931U (en) | 2013-09-18 | 2013-09-18 | Sewage treatment unit for production of coal chemical industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320579134.4U CN203486931U (en) | 2013-09-18 | 2013-09-18 | Sewage treatment unit for production of coal chemical industry |
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| Publication Number | Publication Date |
|---|---|
| CN203486931U true CN203486931U (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320579134.4U Expired - Lifetime CN203486931U (en) | 2013-09-18 | 2013-09-18 | Sewage treatment unit for production of coal chemical industry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203486931U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496755A (en) * | 2013-09-18 | 2014-01-08 | 天脊煤化工集团股份有限公司 | Method and device for treating coal chemical industry production sewage |
| CN109179842A (en) * | 2018-10-30 | 2019-01-11 | 南京工程学院 | A kind of slaughterhouse process water regenerative system based on solar energy and air source heat pump |
-
2013
- 2013-09-18 CN CN201320579134.4U patent/CN203486931U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496755A (en) * | 2013-09-18 | 2014-01-08 | 天脊煤化工集团股份有限公司 | Method and device for treating coal chemical industry production sewage |
| CN109179842A (en) * | 2018-10-30 | 2019-01-11 | 南京工程学院 | A kind of slaughterhouse process water regenerative system based on solar energy and air source heat pump |
| CN109179842B (en) * | 2018-10-30 | 2023-11-21 | 南京工程学院 | Slaughterhouse process water regeneration system based on solar energy and air source heat pump |
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Granted publication date: 20140319 |
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