CN103121774A - Multi-stage recycling device and method for waste water in semi-coke production - Google Patents

Multi-stage recycling device and method for waste water in semi-coke production Download PDF

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Publication number
CN103121774A
CN103121774A CN2013100392662A CN201310039266A CN103121774A CN 103121774 A CN103121774 A CN 103121774A CN 2013100392662 A CN2013100392662 A CN 2013100392662A CN 201310039266 A CN201310039266 A CN 201310039266A CN 103121774 A CN103121774 A CN 103121774A
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CN
China
Prior art keywords
oil
waste water
water
ammonia
outlet
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CN2013100392662A
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Chinese (zh)
Inventor
毛少祥
孙洪桥
闫杰栋
吴昊
党威
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陕西华祥能源科技集团有限公司
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Priority to CN2013100392662A priority Critical patent/CN103121774A/en
Publication of CN103121774A publication Critical patent/CN103121774A/en

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Abstract

The invention relates to a multi-stage recycling device and method for waste water in semi-coke production. The invention can be used for solving the problems that pollution is caused by the waste water in the semi-coke production and the waste water in the semi-coke production is recycled, an economic attractive force of a semi-coke project can be increased, clean production of the semi-coke industry can be promoted, and circular economy development is realized. According to the multi-stage recycling method, the waste water in the semi-coke production firstly passes through an ash pond and a rotational flow tank, solid impurities such as suspended matters are removed, then the waste water enters a dissolved air floatation device to compulsively separate oil and recycle the oil, the semi-coke waste water after oil separation enters a phenol recycling device, phenol in the waste water in the semi-coke production is extracted and recycled in the phenol recycling device, yielding water of the phenol recycling device passes through an ammonia vaporizing device, and strong ammonia water is recycled.

Description

The multistage retrieving arrangement of a kind of blue charcoal factory effluent resource utilization and method
Technical field
The present invention relates to a kind of coal chemical industrial waste water treatment unit and treatment process, be specifically related to the multistage retrieving arrangement of a kind of blue charcoal factory effluent resource utilization and method.
Background technology
China's energy structure is oil-poor, weak breath, many coals, is the contradiction that solves china natural resources constructional aspect and Economic development, and the dependence of minimizing to crude oil is in recent years at China's main coal-producing area develop actively Chemical Industry, as coal liquefaction project etc.Coal Chemical Industry has improved the comprehensive utilization value of coal greatly, and the waste water complicated that produces in the Coal Chemical Industry production process is difficult for processing.Therefore, reasonably the use of wastewater processing technology, be the guarantee that Chemical Industry is gone on the benign development recycling economy, realizes the win-win of economic development and environment protection.
Blue charcoal production, it is mainly a kind of middle low temperature (the approximately 650 ℃) distillation process take not (weak) sticking coal as raw material, in this explained hereafter, can obtain blue charcoal (semicoke), the products such as light, heavy coal tar and middle low-temperature pyrolysis coal gas are in Shaanxi of China, the ground such as Inner Mongol, Datong, Xinjiang have abundant high-quality (not glue) coal, adapt with China Economic development, blue charcoal industry is also developing rapidly, and blue carbon yield in 2008 is 32,757 ten thousand tons of left and right, and blue carbon yield in 2009 is 34,500 ten thousand tons of left and right.Compare with coke high temperature (approximately 1000 ℃) distillation process, in blue charcoal, low-temperature pyrolysis removes coal gas that fugitive constituent generates without the high temperature secondary cracking, contain in a large number not by the pollutent of high temperature oxidation in the raw gas washing water, its concentration exceeds 10 times of left and right than coking chemical waste water.The waste water complicated component that blue charcoal produces in the low-temperature pyrolysis of raw coal, gas purification process, contain a large amount of loop chain organic compound, nitrine class mineral compound, oil in water, ammonia nitrogen, phenol, COD, SS equal size are very high, as the about 40000mg/l of COD content, ammonia-nitrogen content is 3000mg/l approximately, total phenol content is 15000mg/l approximately, and the high and complicated component of the concentration of pollutent in blue charcoal factory effluent makes blue charcoal factory effluent be difficult to process.
At present, blue charcoal sewage treatment process commonly used has following three kinds of methods: method one, blue charcoal waste water adopts the multiple-effect evaporation condensed combustion to administer technology, High Temperature High Pressure Catalytic Wet Oxidation technology, utilize flue gas treatment etc., and these some process system operations are complicated, working cost is high and discharging water quality is seriously not up to standard; Method two, burning disposal and traditional biochemical processing process are adopted in blue charcoal wastewater treatment, and burning disposal will consume a large amount of coal gas, and will dilute with a large amount of fresh waters in the biochemical treatment process, strengthened the quantity discharged of follow-up sewage, and water quality is unstable, not up to standard.The method energy consumption is high, and benefit is low; Method three, blue charcoal factory effluent adopts large tank advection sedimentation oil removing, remove portion impurity and about 80% coal tar, the coal tar of recovery is sold, and the water after processing returns production systemic circulation spray raw gas.In this technique, oil recovery rate is lower, and the effluent quality after processing is unstable.
Above three kinds of methods also have a common weak point, and some useful components in blue charcoal waste water do not reclaim as coal tar, phenol, ammonia etc., make resource can not get recycling, and this not only causes the significant waste of resource, has also polluted environment.
Summary of the invention
The object of the present invention is to provide that a kind of can to overcome traditional blue charcoal waste water treatment process working cost high, fluctuation of service, poor processing effect, the useful component in waste water can not get the multistage retrieving arrangement of blue charcoal factory effluent resource utilization and the method for the defectives such as effective and reasonable recovery.
for achieving the above object, the inventive system comprises the cyclonic separation tank that is connected with blue charcoal waste water, discharge through dregs of fat mouth through the isolated impurity of cyclonic separation tank, cyclonic separation tank water outlet is connected with the entrance of dissolved air flotation device, the outlet of dissolved air flotation device upper end is connected with the light oil surge tank, the lower end outlet is connected with the heavy oil surge tank, the wastewater outlet of dissolved air flotation device is connected with the entrance of smart oil removal plant, an outlet of essence oil removal plant is connected with the tar storage tank, another outlet is connected with the phenol extraction tower, also offer the extraction agent entrance on the phenol extraction tower, the outlet of phenol extraction tower is connected with the entrance of back extraction recovery tower, the back extraction recovery tower is isolated crude phenols and is sent into the crude phenols storage tank, the extraction agent of regeneration is connected with the extraction agent entrance of phenol extraction tower by the road, the wastewater outlet of back extraction recovery tower is connected with the entrance of ammonia still, and the back extraction recovery tower also is connected with low-pressure steam by pipeline respectively with ammonia still, ammonia after ammonia still separates is connected with the virgin ammonia liquor storage tank, the water outlet of ammonia still is connected with biochemistry pool by the road.
Described blue charcoal waste water is for removing the waste water of larger particles impurity through detritus pool.
The upper end of described dissolved air flotation device also is provided be used to the Oil scraper that strikes off light oil, be provided with oil well pump between dissolved air flotation device lower end outlet and heavy oil surge tank, and the light oil surge tank is connected with the tar storage tank respectively with the outlet of heavy oil surge tank.
Between described dissolved air flotation device and smart oil removal plant, the buffering water pot is installed also.
The described waste water that enters ammonia still is adjusted the pH value more than 10, and waste water is sent into from the ammonia still top after heat exchange, and low-pressure steam feeds at the bottom of the ammonia still ammonia is steamed.
The multistage recovery method of the blue charcoal factory effluent resource utilization of the present invention is as follows:
the blue charcoal waste water that high oil-containing contains phenol passes through detritus pool except entering the cyclonic separation tank after granule foreign larger in anhydrating, remove the impurity of 80%-90% in the cyclonic separation tank, the water outlet of cyclonic separation tank enters dissolved air flotation device, the light oil floating is scraped continuously by Oil scraper and sends into the light oil surge tank in dissolved air flotation device, heavy oil is deposited in bottom airfloat equipment, extract out with pump and send into the heavy oil surge tank, after light oil storage tank and the oily water separation of heavy oil surge tank, oil is sent into the tar storage tank, waste water enters into smart oil removal plant through the buffering water pot, after tiny oil droplets and oil in water emulsion in anhydrating, oil is sent into the tar storage tank, water enters the phenol extraction tower,
Waste water after smart oil removing and extracting reagent with low boiling point cross-flow enter the phenol extraction tower and fully mix, free phenol dissolves in extraction agent, mixed solution is isolated crude phenols and is sent into the crude phenols storage tank in the back extraction recovery tower afterwards, the extraction agent of regeneration recycles, go out tower waste water and enter ammonia still, the waste water that enters ammonia still is adjusted pH value more than 10, and infeed steam steams ammonia at the bottom of the ammonia still, ammonia is sent into the virgin ammonia liquor storage tank, and the ammonia still water outlet enters biochemistry pool.
The invention solves pollution problem and recycling that blue charcoal factory effluent causes, can improve the economic attractiveness of blue charcoal project, promote the cleaner production of blue charcoal industry, realize recycling economy development.
The present invention first passes through detritus pool and eddy flow tank with blue charcoal factory effluent, remove the solid impurities such as suspended substance, entering afterwards dissolved air flotation device forces separating oil and reclaims, blue charcoal waste water after separating oil enters the phenol retrieving arrangement, in this device, the phenol extraction in blue charcoal factory effluent is reclaimed, the water outlet of phenol retrieving arrangement is reclaimed strong aqua through ammonia steaming device.
The solid impurity process of removing of the present invention is, blue charcoal waste water from production system, at first enter detritus pool, the solid impurity natural subsidence that in water, density is larger is removed, the waste water that contains the impurity such as partial suspended thing enters the eddy flow tank, utilize the difference of water and various impurity densities, impurity most in the eddy flow tank are removed.
Reclaiming the coal tar process is, the dissolved air flotation device bottom is provided with swash plate, the air dissolved pump operating pressure of air-floating apparatus is 0.6Mpa, when current during through air-floating apparatus, the a large amount of micro-bubbles that produce in air supporting, carrying oil droplet floating upward quickly in water to the water surface, the Oil scraper above air supporting scrapes the oil on the water surface in oil scupper, is sent to the light oil storage tank by pipeline.In water the larger coal tar of part proportion under the effect of swash plate fast deposition in bottom of device, send into the heavy oil storage tank by oil well pump.The air supporting water outlet enters smart oil removal plant, further except the oil in anhydrating, so that in water, oil-contg satisfies the requirement of reclaiming the phenol device, and the refiltered oil process, the oil separating rate is than the high approximately 10%-15% of traditional large tank refiltered oil rate.
Reclaiming the phenol process is, in the phenol extraction tower, fully contacts with the blue charcoal factory effluent after efficient extraction agent and separating oil, and the phenol in waste water enters in extraction agent, after passing through reextraction, obtains crude phenols, and the percentage extraction of phenol can reach more than 90%.
Reclaiming the ammonia process is, at first adjusts waste water ph more than 10, and waste water is sent into from the ammonia still top after heat exchange.Feed steam at the bottom of the ammonia still ammonia is steamed, ammonia is sent into virgin ammonia liquor storage tank storage tank 13, and the ammonia still water outlet enters biochemistry pool 8.
Described biochemical treatment process is, the blue charcoal waste water after processing through front operation enters equalizing tank, adds 10% liquid caustic soda to adjust pH value to zone of reasonableness, and water sequentially enters anaerobic pond, Aerobic Pond, settling tank afterwards.Settling tank supernatant liquor water quality reaching standard reuse production system, the mud of settling tank bottom enter the sludge drying pond, transport outward by the filter-press dehydration mud cake.
Description of drawings
Fig. 1 is integrated artistic schematic flow sheet of the present invention:
In figure: 1, cyclonic separation tank, 2, dissolved air flotation device, 3. buffering water pot, 4, smart oil removal plant, 5, phenol extraction tower, 6, the back extraction recovery tower, 7, ammonia still, 8, biochemical treatment tank, 9, crude phenols storage tank, 10, the light oil surge tank, 11, the heavy oil surge tank, 12, tar storage tank, 13, the virgin ammonia liquor storage tank.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
referring to picture, the present invention includes the cyclonic separation tank 1 that is connected with the blue charcoal waste water of removing larger particles impurity through detritus pool, discharge through dregs of fat mouth through the isolated impurity of cyclonic separation tank 1, cyclonic separation tank 1 water outlet is connected with the entrance of dissolved air flotation device 2, dissolved air flotation device 2 upper end outlets are connected with light oil surge tank 10, the lower end outlet is connected with heavy oil surge tank 11, the upper end of dissolved air flotation device 2 also is provided be used to the Oil scraper that strikes off light oil, be provided with oil well pump between dissolved air flotation device 2 lower end outlets and heavy oil surge tank 11, and light oil surge tank 10 is connected with tar storage tank 12 respectively with the outlet of heavy oil surge tank 11.the wastewater outlet of dissolved air flotation device 2 is connected with the entrance of smart oil removal plant 4 through buffering water pot 3, an outlet of essence oil removal plant 4 is connected with tar storage tank 12, another outlet is connected with phenol extraction tower 5, also offer the extraction agent entrance on phenol extraction tower 5, the outlet of phenol extraction tower 5 is connected with the entrance of back extraction recovery tower 6, back extraction recovery tower 6 is isolated crude phenols and is sent into crude phenols storage tank 9, the extraction agent of regeneration is connected with the extraction agent entrance of phenol extraction tower 5 by the road, the wastewater outlet of back extraction recovery tower 6 is connected with the entrance of ammonia still 7, and back extraction recovery tower 6 also is connected with low-pressure steam by pipeline respectively with ammonia still 7, the waste water that enters ammonia still 7 is adjusted the pH value more than 10, waste water is sent into from the ammonia still top after heat exchange, low-pressure steam feeds at the bottom of the ammonia still ammonia is steamed, ammonia after ammonia still 7 separates is connected with tank used for storing ammonia 13, the water outlet of ammonia still 7 is connected with biochemistry pool 8 by the road.
method of the present invention is as follows: the blue charcoal waste water that high oil-containing contains phenol passes through detritus pool except entering cyclonic separation tank 1 after granule foreign larger in anhydrating, impurity at the interior removal of cyclonic separation tank 1 80%-90%, 1 water outlet of cyclonic separation tank enters dissolved air flotation device 2, the light oil floating is scraped continuously by Oil scraper and sends into light oil surge tank 10 in dissolved air flotation device, heavy oil is deposited in bottom airfloat equipment, extract out with pump and send into heavy oil surge tank 11, after light oil storage tank 10 and 11 oily water separations of heavy oil surge tank, oil is sent into tar storage tank 12, waste water enters into smart oil removal plant 4 through buffering water pot 3, after tiny oil droplets and oil in water emulsion in anhydrating, oil is sent into tar storage tank 12, water enters phenol extraction tower 5,
Waste water after smart oil removing and extracting reagent with low boiling point cross-flow enter phenol extraction tower 5 and fully mix, free phenol dissolves in extraction agent, mixed solution is isolated crude phenols and is sent into crude phenols storage tank 9 in back extraction recovery tower 6 afterwards, the extraction agent of regeneration recycles, go out tower waste water and enter ammonia still 7, the waste water that enters ammonia still 7 is adjusted pH value more than 10, and infeed steam steams ammonia at the bottom of the ammonia still, ammonia is sent into virgin ammonia liquor storage tank 13, and the ammonia still water outlet enters biochemistry pool 8.
The invention has the advantages that:
1, the multistage recycling processing method of blue charcoal factory effluent resource utilization; dispose of sewage on the one hand, make it reuse up to standard, on the other hand the useful components such as the oil in recycle-water, ammonia, phenol; not only protected water resources, and the more polyvoltine work raw material in water is reasonably recycled.Accomplished protection of the environment and the win-win of developing the economy.
2, the product recovery is wide in variety, efficient is high, economic benefits.
3, technique is advanced, level of automation is high, easy and simple to handle, system run all right.
4, oil removing (refiltered oil) efficient is high, and the device anti-shock loading is high.
5, adopt solvent extraction directly to obtain free phenol, extraction efficiency is high, reaches more than 90%.
6, extraction agent is renewable recycles, and does not need soda acid to wash, and does not have by product to produce and secondary pollution.
7, the waste water after the processing, the concentration of its COD, ammonia nitrogen greatly reduces, and significantly improves the color of waste water, waste water is become faint yellow from dark-brown.The clearance of total phenol in follow-up biochemical processed waste water〉95, ammonia nitrogen〉85%, COD〉90%, final discharged wastewater met the national standard or middle water reuse.

Claims (6)

1. multistage retrieving arrangement of blue charcoal factory effluent resource utilization, it is characterized in that: comprise the cyclonic separation tank (1) that is connected with blue charcoal waste water, discharge through dregs of fat mouth through the isolated impurity of cyclonic separation tank (1), cyclonic separation tank (1) water outlet is connected with the entrance of dissolved air flotation device (2), the outlet of dissolved air flotation device (2) upper end is connected with light oil surge tank (10), the lower end outlet is connected with heavy oil surge tank (11), the wastewater outlet of dissolved air flotation device (2) is connected with the entrance of smart oil removal plant (4), an outlet of essence oil removal plant (4) is connected with tar storage tank (12), another outlet is connected with phenol extraction tower (5), the phenol extraction tower also offers the extraction agent entrance on (5), the outlet of phenol extraction tower (5) is connected with the entrance of back extraction recovery tower (6), back extraction recovery tower (6) is isolated crude phenols and is sent into crude phenols storage tank (9), the extraction agent of regeneration is connected with the extraction agent entrance of phenol extraction tower (5) by the road, the wastewater outlet of back extraction recovery tower (6) is connected with the entrance of ammonia still (7), and back extraction recovery tower (6) also is connected with low-pressure steam by pipeline respectively with ammonia still (7), ammonia after ammonia still (7) separates is connected with virgin ammonia liquor storage tank (13), the water outlet of ammonia still (7) is connected with biochemistry pool (8) by the road.
2. the multistage retrieving arrangement of blue charcoal factory effluent resource utilization according to claim 1 is characterized in that: described blue charcoal waste water is for removing the waste water of larger particles impurity through detritus pool.
3. the multistage retrieving arrangement of blue charcoal factory effluent resource utilization according to claim 1, it is characterized in that: the upper end of described dissolved air flotation device (2) also is provided be used to the Oil scraper that strikes off light oil, be provided with oil well pump between the outlet of dissolved air flotation device (2) lower end and heavy oil surge tank (11), and light oil surge tank (10) is connected with tar storage tank (12) respectively with the outlet of heavy oil surge tank (11).
4. the multistage retrieving arrangement of blue charcoal factory effluent resource utilization according to claim 1, is characterized in that: buffering water pot (3) also is installed between described dissolved air flotation device (2) and smart oil removal plant (4).
5. the multistage retrieving arrangement of blue charcoal factory effluent resource utilization according to claim 1, it is characterized in that: the described waste water that enters ammonia still (7) is adjusted the pH value more than 10, waste water is sent into from the ammonia still top after heat exchange, and low-pressure steam feeds at the bottom of the ammonia still ammonia is steamed.
6. method for reclaiming waste water that utilizes the multistage retrieving arrangement of blue charcoal factory effluent resource utilization claimed in claim 1, it is characterized in that: the blue charcoal waste water that high oil-containing contains phenol passes through detritus pool except entering cyclonic separation tank (1) after granule foreign larger in anhydrating, remove the impurity of 80%-90% in cyclonic separation tank (1), 1 water outlet of cyclonic separation tank enters dissolved air flotation device (2), the light oil floating is scraped continuously by Oil scraper and sends into light oil surge tank (10) in dissolved air flotation device, heavy oil is deposited in bottom airfloat equipment, extract out with pump and send into heavy oil surge tank (11), after light oil storage tank (10) and heavy oil surge tank (11) oily water separation, oil is sent into tar storage tank (12), waste water enters into smart oil removal plant (4) through buffering water pot (3), after tiny oil droplets and oil in water emulsion in anhydrating, oil is sent into tar storage tank (12), water enters phenol extraction tower (5),
Waste water after smart oil removing and extracting reagent with low boiling point cross-flow enter phenol extraction tower (5) and fully mix, free phenol dissolves in extraction agent, mixed solution is isolated crude phenols and is sent into crude phenols storage tank (9) in back extraction recovery tower (6) afterwards, the extraction agent of regeneration recycles, go out tower waste water and enter ammonia still (7), the waste water that enters ammonia still (7) is adjusted the pH value more than 10, feeding steam at the bottom of the ammonia still steams ammonia, ammonia is sent into virgin ammonia liquor storage tank (13), and the ammonia still water outlet enters biochemistry pool (8).
CN2013100392662A 2013-01-31 2013-01-31 Multi-stage recycling device and method for waste water in semi-coke production CN103121774A (en)

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Cited By (10)

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Publication number Priority date Publication date Assignee Title
CN103319020A (en) * 2013-06-29 2013-09-25 济钢集团有限公司 Surplus ammonia water rotational flow oil removing system
CN103553269A (en) * 2013-10-31 2014-02-05 北京清大国华环保科技有限公司 Method and device for treating and recycling semi-coke wastewater
CN104860444A (en) * 2015-05-27 2015-08-26 张世文 Device and method for recovering coal tar in semi-coke wastewater
CN104926030A (en) * 2015-05-27 2015-09-23 波鹰(厦门)科技有限公司 Semi coke sewage disposal and regeneration recycle method
CN104926028A (en) * 2015-05-27 2015-09-23 张世文 Comprehensive utilization and treatment recycling method for semi-coke wastewater resources
CN104944691A (en) * 2015-06-10 2015-09-30 张世文 Semicoke wastewater treatment and regeneration and resource reclamation device based on membrane concentration
CN105236667A (en) * 2014-07-07 2016-01-13 中石化洛阳工程有限公司 Closed treatment method for wood-tar processing wastewater
CN105461137A (en) * 2015-12-19 2016-04-06 榆林学院 Efficient pre-treatment device of oily wastewater
CN105601055A (en) * 2016-03-21 2016-05-25 中国矿业大学 Semi-coke wastewater multi-level treatment technology
CN109943378A (en) * 2019-04-19 2019-06-28 山西诺凯化工技术有限公司 A kind of coke-stove gas integrated purifying method

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CN103319020A (en) * 2013-06-29 2013-09-25 济钢集团有限公司 Surplus ammonia water rotational flow oil removing system
CN103553269A (en) * 2013-10-31 2014-02-05 北京清大国华环保科技有限公司 Method and device for treating and recycling semi-coke wastewater
CN105236667A (en) * 2014-07-07 2016-01-13 中石化洛阳工程有限公司 Closed treatment method for wood-tar processing wastewater
CN104860444A (en) * 2015-05-27 2015-08-26 张世文 Device and method for recovering coal tar in semi-coke wastewater
CN104926030A (en) * 2015-05-27 2015-09-23 波鹰(厦门)科技有限公司 Semi coke sewage disposal and regeneration recycle method
CN104926028A (en) * 2015-05-27 2015-09-23 张世文 Comprehensive utilization and treatment recycling method for semi-coke wastewater resources
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CN104944691A (en) * 2015-06-10 2015-09-30 张世文 Semicoke wastewater treatment and regeneration and resource reclamation device based on membrane concentration
CN104944691B (en) * 2015-06-10 2017-07-14 张世文 The semi-coke wastewater processing regeneration concentrated based on film and resource recycling device
CN105461137A (en) * 2015-12-19 2016-04-06 榆林学院 Efficient pre-treatment device of oily wastewater
CN105461137B (en) * 2015-12-19 2017-12-29 榆林学院 A kind of oily waste water highly effective pretreatment apparatus
CN105601055A (en) * 2016-03-21 2016-05-25 中国矿业大学 Semi-coke wastewater multi-level treatment technology
CN105601055B (en) * 2016-03-21 2019-03-29 中国矿业大学 A kind of semi-coke wastewater multilevel processing technology
CN109943378A (en) * 2019-04-19 2019-06-28 山西诺凯化工技术有限公司 A kind of coke-stove gas integrated purifying method

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Application publication date: 20130529