CN106315971A - Technology and process for pretreatment of coal chemical wastewater - Google Patents
Technology and process for pretreatment of coal chemical wastewater Download PDFInfo
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- CN106315971A CN106315971A CN201510383343.5A CN201510383343A CN106315971A CN 106315971 A CN106315971 A CN 106315971A CN 201510383343 A CN201510383343 A CN 201510383343A CN 106315971 A CN106315971 A CN 106315971A
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Abstract
The invention provides a technology and a process for pretreatment of coal chemical wastewater. The technology and the process can reduce the concentration of COD in high-concentration coal chemical wastewater to 2000 mg/L from 30000 to 35000 mg/L, and can realize emission up to standard through biochemical treatment. The technology and the process comprise the following steps: quality-lifted and the high-concentration coal chemical wastewater are mixed and absorb organic matters in wastewater; after liquid-solid separation of coal water slurry formed by the quality-lifted coal and the wastewater, black wastewater is filtered and then enters the next process of biochemical treatment; and coal slag is dried and discharged, or is used as a boiler fuel.
Description
Technical field
The invention belongs to technical field of sewage, be specifically related to preconditioning technique and the technique of coal chemical industry sewage.
Background technology
Low cost process coal chemical industry sewage and to realize qualified discharge be an important problem in environmental conservation.Current Coal Chemical Industry mainly uses biochemical processing and technique, and effect is undesirable；The sewage simultaneously entering biochemical treatment has more strict requirements to the content of the COD in sewage, phenols, ammonium salt and heavy metal.
For giving full play to the effect of microorganism, effectively remove the COD content in sewage and realize sewage qualified discharge, need the sewage to entering sewage disposal system to carry out pretreatment, to control the content of COD, phenols, ammonium salt and heavy metal in sewage.Sewage disinfection treatment measure generally uses use clean water homogenizing.The most i.e. increase the consumption of clean water, require again to expand sewage treatment capacity, also add the investment of sewage treatment facility equipment simultaneously.It is true it has been proved that activated carbon can COD material, phenols, ammonium salt and the heavy metal in absorption effluent effectively.But, the price of activated carbon is high, for the pretreatment of sewage, high cost, so not being promoted.
Test proves, the adsorption property of the active charcoal of upgraded coal formed after fine coal low temperature pyrogenation, COD material, phenols, Ammonia and the heavy metal in activated carbon adsorption coal chemical industry sewage, the content of COD material, phenols, Ammonia and heavy metal in reduction sewage can be substituted.
Upgraded coal is compared with activated carbon, cheap, thus be accordingly used in the pretreatment of sewage, can be effectively reduced cost of sewage disposal.
Use upgraded coal targetedly sewage to be carried out pretreatment, preferable environmental benefit and social benefit can also be produced while enterprise realizes economic benefit.
Summary of the invention
A kind of coal chemical industry sewage preconditioning technique and technique: this technology and technique have the features such as COD, phenols, ammonium salt and heavy metal removing rate during sewage disinfection treatment are high, and technological process is short, and equipment investment is few；Not only COD in coal chemical industry sewage can be reduced to below 2000mg/L from 30000～35000mg/L, and adsorb organic cinder and be also used as the fuel use of boiler, also will not produce secondary pollution.
Upgraded coal physical property: specific surface area is not less than 300m2/ g, particle diameter is not less than 0.5mm.
There is the upgraded coal of certain particle diameter and specific surface area and in pretreatment mixing pit, be mixed to form, with the coal chemical industry sewage of high concentration, the water-coal-slurry sewage that upgraded coal concentration is not more than 40%, the sewage time of staying in mixing pit is not more than 480min, and mixing temperature is not higher than 45 DEG C.
High-concentration coal chemical engineering sewage is during mixing with upgraded coal, and Organic substance, ammonium salt and heavy metal in sewage are adsorbed by upgraded coal, and in sewage, COD is reduced to below 2000mg/L from 30000～35000mg/L；Adsorption temp 30～40 DEG C, adsorption time 480min.Air it is passed through, to prevent upgraded coal from precipitating in pond bottom mixing pit.
In pretreatment mixing pit, water-coal-slurry sewage enters sewage collecting pool by overflow manner, and in sewage collecting pool, water-coal-slurry sewage is squeezed into liquid-solid separator by pump and carried out the solid-liquor separation of sewage and upgraded coal.In liquid-solid separator, water-coal-slurry sewage is separated into the moisture content cinder less than 80% and the upgraded coal concentration sewage of low concentration less than 5%.
From liquid-solid separator sewage of low concentration out, it is admitted to filter and filters out tiny upgraded coal, make sewage become limpid.Limpid sewage enters back into next living according to principles for self-cultivation chemical industry sequence and processes.Operation temperature 30～40 DEG C.Filter out tiny upgraded coal to use as the fuel of boiler.
The isolated cinder of liquid-solid separator is sent into drying machine by belt and is dried, and reduces moisture.Baking temperature: 70～90 DEG C, moisture: ＜ 25%.Dried cinder can use as the fuel of boiler.
Figure1 is coal tar extraction and separation technology flow process in coal tar greasy filthFigure。
Claims (10)
1. a coal chemical industry sewage preconditioning technique is characterized in that with technique, and described technique comprises the steps:
Mixing: upgraded coal is mixed to form, with high-concentration coal chemical engineering sewage, the water-coal-slurry sewage that upgraded coal concentration is not more than 40%, and the sewage time of staying in mixing pit is not more than 480min.
2. absorption: coal chemical industry sewage is during mixing with upgraded coal, and the harmful substance such as Organic substance, heavy metal is adsorbed by upgraded coal, adsorption temp 30～40 DEG C, adsorption time 480min.
3. solid-liquor separation: the water-coal-slurry sewage entrance liquid-solid separator having adsorbed the harmful substance such as Organic substance, heavy metal carries out solid-liquor separation, forms the moisture content cinder less than 80% and the sewage of low concentration containing upgraded coal.
4. filter: have the sewage of low concentration of upgraded coal that upgraded coal is filtered to remove, be converted into limpid sewage, enter next living according to principles for self-cultivation chemical industry sequence and process.
5. filtration temperature 30～40 DEG C.
6. it is dried: cinder is dried by drying machine, reduces moisture.
7. baking temperature: 70～90 DEG C, moisture: ＜ 25%.
A kind of coal chemical industry sewage preconditioning technique the most according to claim 1 and technique, it is characterised in that:
Upgraded coal is used to process the preconditioning technique of coal chemical industry sewage.
9. use upgraded coal to process the pretreatment combination size technique of coal chemical industry sewage.
10. upgraded coal physical property requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510383343.5A CN106315971A (en) | 2015-07-03 | 2015-07-03 | Technology and process for pretreatment of coal chemical wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510383343.5A CN106315971A (en) | 2015-07-03 | 2015-07-03 | Technology and process for pretreatment of coal chemical wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106315971A true CN106315971A (en) | 2017-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510383343.5A Pending CN106315971A (en) | 2015-07-03 | 2015-07-03 | Technology and process for pretreatment of coal chemical wastewater |
Country Status (1)
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| CN (1) | CN106315971A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109896692A (en) * | 2017-12-08 | 2019-06-18 | 中国石油化工股份有限公司 | A kind of coal-to-olefin and its technique of sewage treatment coupling |
| CN113943078A (en) * | 2021-10-28 | 2022-01-18 | 内蒙古万众炜业科技环保股份公司 | Treatment process for sewage generated by coal cracking |
Citations (5)
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| CN1148571A (en) * | 1996-07-20 | 1997-04-30 | 南宁正宇高新技术有限责任公司 | Method for treating waste industrial water from light industry by using burning boiler |
| US6395678B1 (en) * | 1999-09-01 | 2002-05-28 | Aero-Terra-Aqua Technologies Corporation | Bead and process for removing dissolved metal contaminants |
| CN201538738U (en) * | 2009-11-05 | 2010-08-04 | 北京神州瑞霖环保科技有限公司 | LUBAF water processing reactor |
| CN102001789A (en) * | 2010-11-15 | 2011-04-06 | 北京国能普华环保工程技术有限公司 | Process for treating coal chemical waste water |
| CN102358649A (en) * | 2011-09-19 | 2012-02-22 | 李柏荣 | Treatment process of lignite upgrading wastewater |
-
2015
- 2015-07-03 CN CN201510383343.5A patent/CN106315971A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1148571A (en) * | 1996-07-20 | 1997-04-30 | 南宁正宇高新技术有限责任公司 | Method for treating waste industrial water from light industry by using burning boiler |
| US6395678B1 (en) * | 1999-09-01 | 2002-05-28 | Aero-Terra-Aqua Technologies Corporation | Bead and process for removing dissolved metal contaminants |
| CN201538738U (en) * | 2009-11-05 | 2010-08-04 | 北京神州瑞霖环保科技有限公司 | LUBAF water processing reactor |
| CN102001789A (en) * | 2010-11-15 | 2011-04-06 | 北京国能普华环保工程技术有限公司 | Process for treating coal chemical waste water |
| CN102358649A (en) * | 2011-09-19 | 2012-02-22 | 李柏荣 | Treatment process of lignite upgrading wastewater |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109896692A (en) * | 2017-12-08 | 2019-06-18 | 中国石油化工股份有限公司 | A kind of coal-to-olefin and its technique of sewage treatment coupling |
| CN109896692B (en) * | 2017-12-08 | 2022-07-12 | 中国石油化工股份有限公司 | Coal-to-olefin and sewage treatment coupling process thereof |
| CN113943078A (en) * | 2021-10-28 | 2022-01-18 | 内蒙古万众炜业科技环保股份公司 | Treatment process for sewage generated by coal cracking |
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Application publication date: 20170111 |