CN114772789A - High-organic matter mother liquor water degradation treatment process - Google Patents
High-organic matter mother liquor water degradation treatment process Download PDFInfo
- Publication number
- CN114772789A CN114772789A CN202210510511.2A CN202210510511A CN114772789A CN 114772789 A CN114772789 A CN 114772789A CN 202210510511 A CN202210510511 A CN 202210510511A CN 114772789 A CN114772789 A CN 114772789A
- Authority
- CN
- China
- Prior art keywords
- mother liquor
- water
- organic matter
- oxidation reactor
- treatment process
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012452 mother liquor Substances 0.000 title claims abstract description 150
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000005416 organic matter Substances 0.000 title claims abstract description 34
- 230000008569 process Effects 0.000 title claims abstract description 32
- 230000015556 catabolic process Effects 0.000 title claims abstract description 18
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 18
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 47
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 42
- 230000003647 oxidation Effects 0.000 claims abstract description 41
- 239000003513 alkali Substances 0.000 claims abstract description 37
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 34
- 239000000084 colloidal system Substances 0.000 claims abstract description 16
- 238000003860 storage Methods 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 238000005352 clarification Methods 0.000 claims abstract description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 27
- 239000003814 drug Substances 0.000 claims description 27
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 14
- 238000005189 flocculation Methods 0.000 claims description 12
- 230000016615 flocculation Effects 0.000 claims description 12
- 238000004062 sedimentation Methods 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 8
- 239000011152 fibreglass Substances 0.000 claims description 8
- 239000010865 sewage Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 5
- 239000011790 ferrous sulphate Substances 0.000 claims description 5
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 5
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 5
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 5
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 9
- 238000001704 evaporation Methods 0.000 description 8
- 230000008020 evaporation Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000002425 crystallisation Methods 0.000 description 6
- 230000008025 crystallization Effects 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 230000005653 Brownian motion process Effects 0.000 description 3
- 238000005537 brownian motion Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000015784 hyperosmotic salinity response Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/20—Total organic carbon [TOC]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The invention relates to the field of water treatment, in particular to a high organic matter mother liquor water degradation treatment process. A high organic matter mother liquor water degradation treatment process comprises the following steps: step one, mother liquor storage; step two, filtering by a multi-medium filter; step three, filtering by an activated carbon filter; step four, treating by a primary oxidation reactor; step five, adding the alkali agent again; step six, treating by a secondary oxidation reactor; regulating the pH value of the mother liquor; and step eight, removing the colloid in a clarification tank. The method can replace the traditional mother liquor water treatment technology with high organic matter and high TOC content, reduce the capital investment and achieve the purposes of cost reduction and efficiency improvement; the mother liquor is treated by the two-stage oxidation reactor, so that the higher organic matter removal rate can be achieved, the mother liquor after organic matter removal can be recycled, emission reduction and environmental protection are realized, and the daily maintenance and operation cost required by the process is lower.
Description
Technical Field
The invention relates to the field of water treatment, in particular to a high organic matter mother liquor water degradation treatment process.
Background
At present, water is one of important raw materials in the production process of coal chemical industry, coking, electric metallurgy, biological pharmacy, printing and dyeing, chlor-alkali and other chemical industries. In the production processes, a large amount of waste water and waste liquid can be generated, after the waste water and waste liquid are recycled through multi-stage grading treatment, along with the gradual increase of the TOC content of organic matters in multi-end concentrated water, 1% -10% critical mother liquid is finally formed, the COD (chemical oxygen demand) of the mother liquid is high, the TOC of the mother liquid is high, because the salt tolerance of activated sludge biochemical bacteria is low, the mother liquid can not be directly biochemically treated generally, various multi-effect evaporation systems are mainly adopted for treatment at present, the evaporation systems are evaporated and concentrated to produce mixed salt solids, the evaporation systems are forced to circulate, the mother liquid is continuously circulated and reflowed, the organic matters in an evaporation crystallization system can be hardened and blocked, the economic loss is caused, and the labor amount of operators is increased, for example, in the existing mother liquid treatment process, the mother liquid is pretreated in a mother liquid collection tank, and then the mother liquid passes through a multi-medium filter to reduce the turbidity and remove large-particle colloid, then, the mother liquor is changed into mixed salt through an MVR device and a steam roller drying bed for reduction treatment, however, a large amount of capital is required to be invested for evaporation crystallization equipment in the early stage of the method, the steam consumption is large, the daily operation cost of the equipment is high, and the daily maintenance requirement is high; or the mother liquor is directly discharged into an evaporation pond for natural evaporation, but the method has the defects of great environmental protection hidden trouble, leakage risk and influence on local underground water.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
The invention aims to provide a high organic matter mother liquor water degradation treatment process to solve at least one technical problem.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high organic matter mother liquor water degradation treatment process is characterized by comprising the following steps:
step one, mother liquor storage, namely storing mother liquor to be treated into a water storage tank;
step two, filtering by a multi-medium filter, namely pumping the mother liquor in the water storage tank through a pump body and then sending the mother liquor into at least one multi-medium filter for filtering;
step three, filtering by an activated carbon filter, and conveying the mother liquor water treated by the multi-medium filter into at least one activated carbon filter for filtering;
step four, treating the mother liquor by a primary oxidation reactor, namely adding an alkali agent into the mother liquor treated by the activated carbon filter for the first time, adjusting the pH value of the mother liquor to 10-11, filling ozone gas into the mother liquor by an ozone generator, and then feeding the mother liquor into the primary oxidation reactor for oxidation reaction;
step five, adding an alkali agent again, adding the alkali agent into the mother liquor water treated by the primary oxidation reactor for the second time, and adjusting the pH value of the mother liquor water to 10-11;
step six, treating in a secondary oxidation reactor, namely adding a sodium hypochlorite medicament into the mother liquor water which is added with the alkali medicament for the second time, and sending the mother liquor water into the secondary oxidation reactor for oxidation reaction;
step seven, adjusting the pH value of the mother liquor, adding an acid medicament into the mother liquor treated by the secondary oxidation reactor, adjusting the pH value of the mother liquor to 6.5-7.5, adding a ferrous sulfate solution into the mother liquor, fully mixing, then adding an alkali medicament into the mother liquor for the third time, and adjusting the pH value of the mother liquor to 9-10;
and step eight, removing colloids from the clarifying tank, feeding the mother liquor water added with the alkali agent for the third time into the clarifying tank, generating organic matter colloids from the mother liquor water in an alkaline environment, removing the organic matter colloids by filter pressing of a filter press after the organic matter colloids are deposited in the mud, and recycling overflow water of the clarifying tank.
In the first step, the mother liquor in the flocculation sedimentation tank is conveyed into the water storage tank through a pipeline pump. In the first step, the water storage tank is a glass fiber reinforced plastic water tank made of glass fiber reinforced plastic.
And sewage generated in the forward and backward washing processes of the multi-medium filter is sent into the flocculation sedimentation tank through a pipeline pump.
And sewage generated in the forward and backward washing processes of the activated carbon filter is sent into the flocculation sedimentation tank through a pipeline pump.
In the fourth step, ozone gas generated by the ozone generator is mixed with mother liquor water through a gas-liquid mixer.
In the fourth step, the first-stage oxidation reactor adopts a negative pressure oxidation reactor;
in the sixth step, the secondary oxidation reactor adopts a negative pressure oxidation reactor.
And in the fourth step, adding an alkali medicament into the mother liquor for the first time through a metering pump. The metering pump is a diaphragm metering pump.
In the fourth step, the alkali agent added into the mother liquor for the first time is a sodium hydroxide agent;
in the fifth step, the alkali agent added into the mother liquor for the second time is a sodium hydroxide agent;
and seventhly, adding an acid medicament into the mother liquor water by adopting a hydrochloric acid medicament, and adding an alkali medicament into the mother liquor water for the third time by adopting a sodium hydroxide medicament.
Through the design, the invention provides a high organic matter mother liquor water degradation treatment process to replace the traditional high organic matter and high TOC content mother liquor water treatment technology process, so that the capital investment of an MVR device and a roller steam drying bed is reduced, and the purposes of cost reduction and efficiency improvement are achieved; the mother liquor is treated by the two-stage oxidation reactor, so that the higher organic matter removal rate can be achieved, the mother liquor after organic matter removal can be recycled, emission reduction and environmental protection are realized, and the daily maintenance and operation cost required by the process is lower.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, a process for degrading high organic matter mother liquor comprises the following steps: step one, mother liquor storage, namely storing the mother liquor to be treated into a water storage tank; step two, filtering by a multi-medium filter, namely pumping the mother liquor in the water storage tank through a pump body and then sending the mother liquor into at least one multi-medium filter for filtering; step three, filtering by using an activated carbon filter, and conveying the mother liquor water treated by the multi-medium filter into at least one activated carbon filter for filtering; step four, treating the mother liquor by a primary oxidation reactor, adding an alkali agent into the mother liquor treated by the activated carbon filter for the first time, adjusting the pH value of the mother liquor to 10-11, filling ozone gas into the mother liquor by an ozone generator, and then sending the mother liquor into the primary oxidation reactor for oxidation reaction; step five, adding an alkali agent again, adding the alkali agent into the mother liquor treated by the primary oxidation reactor for the second time, and adjusting the pH value of the mother liquor to 10-11; step six, treating in a secondary oxidation reactor, namely adding a sodium hypochlorite medicament into the mother liquor water after the alkali medicament is added for the second time, and sending the mother liquor water into the secondary oxidation reactor for oxidation reaction; step seven, adjusting the pH value of the mother liquor, adding an acid medicament into the mother liquor treated by the secondary oxidation reactor, adjusting the pH value of the mother liquor to 6.5-7.5, adding a ferrous sulfate solution into the mother liquor, fully mixing, then adding an alkali medicament into the mother liquor for the third time, and adjusting the pH value of the mother liquor to 9-10; and step eight, removing colloid in the clarification tank, feeding the mother liquor water added with the alkali agent for the third time into the clarification tank, generating organic colloid in the mother liquor water in an alkaline environment, removing the organic colloid by filter pressing of a filter press after the organic colloid is deposited in the mud, and recycling overflow water of the clarification tank. Through the design, the invention provides a high organic matter mother liquor water degradation treatment process, which replaces the traditional mother liquor water treatment technology process with high organic matter and high TOC content, reduces the capital investment of two civil engineering projects of an MVR device and a roller steam drying bed, achieves the purposes of cost reduction and efficiency improvement, and reduces the steam consumption.
The design can directly carry out secondary oxidative decomposition treatment on the mother liquor water with high organic matter content without investment on a heat-building crystallization system, the mother liquor water can be mechanically filtered through a multi-media filter and an activated carbon filter, the method is simple, practical and low in cost, the multi-media filter and the activated carbon filter do not need to add any chemical agent, only needs to regularly carry out forward and backward washing, and the sewage after the forward and backward washing can be collected and returned to a flocculation sedimentation tank for pretreatment; because the process flow is reduced, the medicament which does not need to be added can save a large amount of investment cost, and solid waste can not be generated; the removal rate of the organic matters in the whole system through two-stage oxidation mother liquor can reach 70-80%, the mother liquor after the organic matters are removed can return to the previous step for continuous treatment, emission reduction and environmental protection are realized, and the daily maintenance and operation cost is low.
In the first step, mother liquor in the flocculation sedimentation tank is conveyed into a water storage tank through a pipeline pump. The mother liquor can be pretreated by a flocculation sedimentation tank. The water storage tank is a glass fiber reinforced plastic water tank made of glass fiber reinforced plastics. The mother liquor containing high organic matter has strong corrosivity, and the glass fiber reinforced plastic water tank made of glass fiber reinforced plastic has corrosion resistance, and has low manufacturing cost and small occupied area.
In the second step, the pump body adopts a stainless steel horizontal centrifugal pump. The stainless steel horizontal centrifugal pump has better corrosion resistance. And then the mother liquor water containing high organic matters and high TOC is conveyed to a multi-media filter through a pipeline for treatment by the pump body, and the flow rate of the pipeline can be controlled to be more proper 2M/s.
The multi-media filter is used for removing macromolecular organic matters and colloidal particles in water, and the number of the multi-media filter can be determined according to the control ranges of the treated water quantity and the effluent turbidity. The multi-media filter controls the effluent turbidity of the mother liquor to be 20NTU-30 NTU. About 95% of the treated water enters a follow-up device to further degrade organic matters, and in order to control the sewage discharge, the multi-media filter generates about 5% of sewage in the forward and reverse washing processes, and the sewage can be sent back to the flocculation sedimentation tank through a pipeline pump to be pretreated to remove the organic matters.
The mother liquor water treated by the multi-medium filter is sent into an active carbon filter by a booster pump. The activated carbon filter is simple and practical, and has long service cycle. The active carbon filter is used for removing COD in water, and the removal rate of the COD is 60-75%. The SDI value of the effluent of the activated carbon filter is controlled within 50. The number of the activated carbon filters can be determined according to the treated water quantity and the effluent SDI value control range. 95% water after the active carbon filter is handled gets into follow-up device and further degrades the organic matter, and in order to control the blow off quantity, the active carbon filter just, produces about 5% blow off water among the backwash process, and the flocculation sedimentation tank is sent back to the accessible tubing pump and is carried out the preliminary treatment and get rid of the organic matter.
After the mother liquor water is treated by the activated carbon filter, adding an alkali agent into the produced water of the activated carbon filter, adjusting the pH value of the mother liquor to 10-11, adding the alkali agent into the mother liquor water for the first time through a metering pump, wherein the alkali agent added into the mother liquor water for the first time can be a sodium hydroxide agent. And (3) introducing ozone gas into the mother liquor water after the alkali medicament is added for the first time, so that the mother liquor and the ozone gas are fully mixed, and in order to ensure the mixing effect of the ozone gas and the mother liquor water, mixing the ozone gas generated by an ozone generator with the mother liquor water through a gas-liquid mixer. The mother liquor and ozone gas are mixed and then enter a primary oxidation reactor to accelerate molecular brownian motion, increase the activity of oxidizing-OH free radicals and rapidly degrade organic matters in the mother liquor, and the degradation rate of the organic matters can reach 50-60%. The primary oxidation reactor can adopt a negative pressure oxidation reactor, the negative pressure of the primary oxidation reactor can be controlled between 0.01MPa and 0.05MPa, the negative pressure can accelerate the Brownian motion of molecules, improve the water activity and increase the free motion of the molecules. Under negative pressure, the ozone gas with strong oxidizing property can crack a large amount of hydroxyl radicals with strong oxidizing property, OH-and organic matters in the mother liquor generate coupling reaction, so that carbon dioxide and water are generated, and the removal rate of the organic matters is ensured.
And adding a small amount of alkali agent into the water produced by the primary oxidation reactor to maintain the pH value of the mother liquor water between 10 and 11. And adding an alkali agent into the mother liquor for the second time through a metering pump, wherein the alkali agent added into the mother liquor for the second time is a sodium hydroxide agent. Then adding a proper amount of sodium hypochlorite through a metering pump, fully and uniformly mixing, and feeding into a secondary oxidation reactor. The secondary oxidation reactor can adopt a negative pressure oxidation reactor, the negative pressure of the secondary oxidation reactor can be controlled to be 0.01MPa-0.05MPa, the negative pressure can accelerate the brownian motion of molecules, accelerate the free activity of the molecules, improve the activity of the mother liquor, accelerate the cracking of sodium hypochlorite to generate a large amount of hydroxyl free radicals, the OH free radicals and organic matters in the mother liquor to generate coupling reaction, the organic matters in the mother liquor are removed for the second time, the organic matters are decomposed into carbon dioxide and water, and the removal rate of the organic matters can reach 50% -60%.
And adding an acid medicament into the water produced by the secondary oxidation reactor to reduce the pH value to 6.5-7.5, adding a proper amount of ferrous sulfate solution, fully mixing, and continuously adding an alkali medicament to adjust the pH value of the mother liquor back to 9-10. The acid agent added into the mother liquor adopts a hydrochloric acid agent, and the alkali agent added into the mother liquor for the third time adopts a sodium hydroxide agent. Acid medicament, ferrous sulfate solution and alkali medicament added for the third time are respectively added into the mother liquor water through different metering pumps. The metering pump can be a diaphragm metering pump.
And finally, sending the mother liquor into a clarification tank, wherein the mother liquor can generate a large amount of organic matter colloids in an alkaline environment, the organic matter colloids are sunk into mud, the sludge generated by the clarification tank can be removed through filter pressing of a filter press, and overflow water of the clarification tank is sent back to a flocculation sedimentation tank through a pipeline conveying pump to realize mother liquor regeneration.
The invention can replace the traditional mother liquor hydrothermal evaporation crystallization treatment process, and achieves the purpose of improving the mother liquor discharge. Firstly, the equipment investment, such as devices, roller steam drying beds and the like, is reduced; meanwhile, the consumption of steam is reduced, and the operation cost is reduced. The process does not need large-scale investment on equipment and site, and can save the site and land. The residual mother liquor of the thermal crystallization is characterized in that the concentration of organic matters, COD and TOC is high, the thermal evaporation cannot be continued, the biochemical treatment effect of the mother liquor is poor, the organic matters and the TOC in the mother liquor are degraded, the treated mother liquor returns to the front end of the system and has the effect of diluting the organic matters and the TOC in the inlet water, and the mother liquor does not need to be discharged outwards; the process breaks through the traditional thermal crystallization treatment process for the mother liquor with high organic matters and high TOC, and the mother liquor can be completely recycled without being discharged through the process.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A high organic matter mother liquor water degradation treatment process is characterized by comprising the following steps:
step one, mother liquor storage, namely storing the mother liquor to be treated into a water storage tank;
step two, filtering by a multi-medium filter, namely pumping the mother liquor in the water storage tank through a pump body and then sending the mother liquor into at least one multi-medium filter for filtering;
step three, filtering by using an activated carbon filter, and conveying the mother liquor water treated by the multi-medium filter into at least one activated carbon filter for filtering;
step four, treating the mother liquor by a primary oxidation reactor, adding an alkali agent into the mother liquor treated by the activated carbon filter for the first time, adjusting the pH value of the mother liquor to 10-11, filling ozone gas into the mother liquor by an ozone generator, and then sending the mother liquor into the primary oxidation reactor for oxidation reaction;
step five, adding an alkali agent again, adding the alkali agent into the mother liquor treated by the primary oxidation reactor for the second time, and adjusting the pH value of the mother liquor to 10-11;
step six, treating in a secondary oxidation reactor, namely adding a sodium hypochlorite medicament into the mother liquor water which is added with the alkali medicament for the second time, and sending the mother liquor water into the secondary oxidation reactor for oxidation reaction;
step seven, adjusting the pH value of the mother liquor, adding an acid medicament into the mother liquor treated by the secondary oxidation reactor, adjusting the pH value to 6.5-7.5, adding a ferrous sulfate solution into the mother liquor, fully mixing, adding an alkali medicament into the mother liquor for the third time, and adjusting the pH value to 9-10;
and step eight, removing colloid in the clarification tank, feeding the mother liquor water added with the alkali agent for the third time into the clarification tank, generating organic colloid in the mother liquor water in an alkaline environment, removing the organic colloid by filter pressing of a filter press after the organic colloid is deposited in the mud, and recycling overflow water of the clarification tank.
2. The degradation treatment process of the high organic matter mother liquor water as claimed in claim 1, wherein in the first step, the mother liquor water in the flocculation sedimentation tank is conveyed into the water storage tank through a pipeline pump.
3. The high organic matter mother liquor water degradation treatment process as claimed in claim 1 or 2, wherein in the first step, the water storage tank is a glass fiber reinforced plastic water tank made of glass fiber reinforced plastic.
4. The high organic matter content mother liquor water degradation treatment process as claimed in claim 2, wherein the sewage generated from the forward and reverse washing processes of the multi-media filter is pumped into the flocculation sedimentation tank through a pipeline pump.
5. The high organic matter content mother liquor water degradation treatment process as claimed in claim 2, wherein the sewage generated from the forward and reverse washing processes of the activated carbon filter is pumped into the flocculation sedimentation tank through a pipeline pump.
6. The process of claim 1, wherein in the fourth step, the ozone gas generated by the ozone generator is mixed with the mother liquor water by a gas-liquid mixer.
7. The high organic matter mother liquor water degradation treatment process according to claim 1, wherein in the fourth step, the primary oxidation reactor is a negative pressure oxidation reactor;
in the sixth step, the secondary oxidation reactor adopts a negative pressure oxidation reactor.
8. The process for degradation treatment of high organic matter mother liquor according to claim 1, wherein in the fourth step, an alkaline agent is added into the mother liquor for the first time through a metering pump.
9. The process according to claim 8, wherein the metering pump is a diaphragm metering pump.
10. The high organic matter mother liquor water degradation treatment process according to claim 1, wherein in the fourth step, the alkali agent added into the mother liquor water for the first time is a sodium hydroxide agent;
in the fifth step, the alkali agent added into the mother liquor for the second time is a sodium hydroxide agent;
and seventhly, adding an acid medicament into the mother liquor water by adopting a hydrochloric acid medicament, and adding an alkali medicament into the mother liquor water for the third time by adopting a sodium hydroxide medicament.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210510511.2A CN114772789A (en) | 2022-05-11 | 2022-05-11 | High-organic matter mother liquor water degradation treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210510511.2A CN114772789A (en) | 2022-05-11 | 2022-05-11 | High-organic matter mother liquor water degradation treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114772789A true CN114772789A (en) | 2022-07-22 |
Family
ID=82437981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210510511.2A Pending CN114772789A (en) | 2022-05-11 | 2022-05-11 | High-organic matter mother liquor water degradation treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114772789A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050087170A (en) * | 2004-02-25 | 2005-08-31 | 김용남 | System for purifying waste water and method thereof |
| KR20100012798A (en) * | 2008-07-28 | 2010-02-08 | 서희동 | Method for treating organic-wastes |
| WO2010133151A1 (en) * | 2009-05-21 | 2010-11-25 | 潍坊金丝达印染有限公司 | Organic wastewater recycling treatment method |
| CN105060552A (en) * | 2015-04-10 | 2015-11-18 | 浙江奇彩环境科技有限公司 | Method for treating disperse blue 56 reduction mother liquor wastewater |
| CN107304093A (en) * | 2016-04-25 | 2017-10-31 | 江苏德邦工程有限公司 | Containing formaldehyde, the integrated deep treatment method of methanol waste water and processing unit |
| CN109133501A (en) * | 2018-08-22 | 2019-01-04 | 青海省地质矿产测试应用中心 | Comprehensive treatment method for nonferrous metal ore wastewater |
| CN114105345A (en) * | 2020-08-31 | 2022-03-01 | 中国石油化工股份有限公司 | PVC mother liquor recycling treatment device and process |
-
2022
- 2022-05-11 CN CN202210510511.2A patent/CN114772789A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050087170A (en) * | 2004-02-25 | 2005-08-31 | 김용남 | System for purifying waste water and method thereof |
| KR20100012798A (en) * | 2008-07-28 | 2010-02-08 | 서희동 | Method for treating organic-wastes |
| WO2010133151A1 (en) * | 2009-05-21 | 2010-11-25 | 潍坊金丝达印染有限公司 | Organic wastewater recycling treatment method |
| CN105060552A (en) * | 2015-04-10 | 2015-11-18 | 浙江奇彩环境科技有限公司 | Method for treating disperse blue 56 reduction mother liquor wastewater |
| CN107304093A (en) * | 2016-04-25 | 2017-10-31 | 江苏德邦工程有限公司 | Containing formaldehyde, the integrated deep treatment method of methanol waste water and processing unit |
| CN109133501A (en) * | 2018-08-22 | 2019-01-04 | 青海省地质矿产测试应用中心 | Comprehensive treatment method for nonferrous metal ore wastewater |
| CN114105345A (en) * | 2020-08-31 | 2022-03-01 | 中国石油化工股份有限公司 | PVC mother liquor recycling treatment device and process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101746912B (en) | Method for treating high-concentration organic industrial waste water and equipment thereof | |
| CN104261622A (en) | Fenton sewage treatment process and equipment thereof | |
| CN107253798B (en) | Advanced treatment and reuse combined process for steel industrial wastewater | |
| CN101591082A (en) | Organic electroplating waste water multicomponent oxide pretreatment process and device | |
| CN106830467B (en) | Fenton method sewage treatment integrated device based on iron mud recycling and method thereof | |
| CN101428941A (en) | Process and apparatus for treating wastewater from pulping papermaking | |
| CN103145296A (en) | Method and device for treating reverse osmosis concentrated water | |
| CN110540318A (en) | Sewage recovery treatment system and treatment process | |
| CN107935300B (en) | Process device and method for treating landfill leachate by non-membrane method | |
| CN112028273A (en) | High-recovery-rate reclaimed water recycling advanced treatment system and treatment method | |
| CN112441701A (en) | Efficient treatment, recycling and zero emission method and system for shale gas flowback liquid | |
| CN217677209U (en) | Coking wastewater recycling treatment system | |
| CN207581590U (en) | A kind of processing unit of pharmaceutical intermediate wastewater | |
| CN114772789A (en) | High-organic matter mother liquor water degradation treatment process | |
| CN110642382A (en) | Anaerobic and aerobic composite biological treatment desalting method | |
| CN105174640A (en) | Biochemical treatment process for paint-producing wastewater | |
| CN203200109U (en) | Processing system of reverse osmosis concentrated water | |
| CN100509661C (en) | Treating technique of polyether polyatomic alcohol producing sewage recovering and utilization | |
| CN215712375U (en) | Glyphosate wastewater treatment device | |
| CN114409207A (en) | Printing ink effluent disposal system | |
| KR20020018572A (en) | Electro coagulation and Bio-wrinkled circulation nutrients removal system | |
| CN111439890A (en) | Modularized garbage leachate treatment equipment | |
| CN207862069U (en) | A kind of high salinity high rigidity organic concentration waste water treatment system difficult to degrade | |
| CN111018247A (en) | Zero release processing system of chemical industry waste water | |
| CN201367384Y (en) | Equipment for treating high-concentration organic industrial wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |