CN115448528A - Comprehensive treatment method for rubber accelerator NS wastewater and waste gas - Google Patents
Comprehensive treatment method for rubber accelerator NS wastewater and waste gas Download PDFInfo
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- 239000002351 wastewater Substances 0.000 title claims abstract description 51
- 239000002912 waste gas Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000007789 gas Substances 0.000 claims abstract description 66
- 238000000746 purification Methods 0.000 claims abstract description 41
- 239000007788 liquid Substances 0.000 claims abstract description 39
- 241000894006 Bacteria Species 0.000 claims abstract description 24
- 230000001546 nitrifying effect Effects 0.000 claims abstract description 23
- 238000010992 reflux Methods 0.000 claims abstract description 18
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 238000007872 degassing Methods 0.000 claims abstract description 8
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 7
- 231100000719 pollutant Toxicity 0.000 claims abstract description 7
- 230000015556 catabolic process Effects 0.000 claims abstract description 6
- 238000006731 degradation reaction Methods 0.000 claims abstract description 6
- 238000001704 evaporation Methods 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims abstract description 5
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- 230000001580 bacterial effect Effects 0.000 claims description 8
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- 239000000945 filler Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
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- 238000001035 drying Methods 0.000 description 5
- 239000002808 molecular sieve Substances 0.000 description 5
- 239000010802 sludge Substances 0.000 description 5
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 125000000623 heterocyclic group Chemical group 0.000 description 3
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- 244000005700 microbiome Species 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
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- YBRBMKDOPFTVDT-UHFFFAOYSA-N tert-butylamine Chemical compound CC(C)(C)N YBRBMKDOPFTVDT-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
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- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical compound C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 231100000086 high toxicity Toxicity 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000006303 photolysis reaction Methods 0.000 description 2
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- 230000008929 regeneration Effects 0.000 description 2
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- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 238000006276 transfer reaction Methods 0.000 description 2
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- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 125000001997 phenyl group Chemical class [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000013040 rubber vulcanization Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- 238000003786 synthesis reaction Methods 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- 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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- 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
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- 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
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- 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
- C02F2209/14—NH3-N
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Oil, Petroleum & Natural Gas (AREA)
- Hydrology & Water Resources (AREA)
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to the technical field of rubber auxiliary wastewater and waste gas treatment, in particular to a comprehensive treatment method of rubber accelerator NS wastewater and waste gas, which comprises the following steps: s1, evaporating and concentrating rubber accelerator NS wastewater, and performing A/O2 biochemical treatment on the obtained concentrated solution to obtain a treated solution; s2, adding the treatment liquid into a degassing pool, and feeding a nitrifying bacteria liquid into the upper part of the biological tail gas purification device through a reflux pump; simultaneously introducing rubber accelerator NS waste gas into the bottom of a biological tail gas purification device to carry out countercurrent spraying with the nitrifying bacteria liquid, and allowing the sprayed nitrifying bacteria liquid to enter an anaerobic tank for pollutant degradation; and (4) discharging gas in the biological tail gas purification device. The invention has the advantages of simple and convenient operation and low operation cost, the treated tail gas can reach the emission standard, the aim of comprehensively treating waste water and waste gas is realized, and the defects of the prior art are overcome.
Description
Technical Field
The invention relates to the technical field of rubber auxiliary wastewater and waste gas treatment, in particular to a comprehensive treatment method for rubber accelerator NS wastewater and waste gas.
Background
The rubber vulcanization accelerator NS (TBBS) wastewater contains a large amount of heterocyclic organic matters difficult to degrade, belongs to high-concentration organic wastewater difficult to degrade, and has the advantages of large molecular weight, strong toxicity, complex structural components, stable properties and easy enrichment. The waste water is mainly from water washing process and filtered mother liquor, and features low chroma and turbidity, but high salinity and CODcr concentration. Meanwhile, the NS waste gas contains various heterocyclic organic matters, and the waste gas mainly comes from tail gas of a synthesis process and a product drying process. Because the traditional hot air drying is mostly adopted for drying the product at present, the drying air quantity is large, and the concentration is low, which is the main characteristic of the tail gas for drying the product.
At present, the treatment process of rubber accelerator NS (TBBS) wastewater in China selects a chemical catalytic oxidation process, an evaporation process and a biochemical treatment process; the waste gas treatment adopts adsorption technologies such as activated carbon and silica gel molecular sieves, and UV photolysis or RTO incineration/RCO incineration treatment technologies, and in the above waste gas treatment technologies, the adsorption technologies such as activated carbon and silica gel molecular sieves have the following problems: high-pressure steam or nitrogen is consumed for protection and heating during regeneration, so that the energy consumption is high; the regeneration of organic matters with high boiling point is difficult, and the inactivation of active carbon or molecular sieve is easily caused; the regenerated solvent still needs to be further refined, so that air pollution is caused; the service life of the active carbon or the molecular sieve can not be ensured according to different tail gas components, the decay period of the adsorption capacity along with time is indefinite, and the active carbon or the molecular sieve needs to be replaced periodically; the replaced adsorbing material is used as dangerous solid waste, and the treatment cost is high. The UV photolysis device mainly has a certain effect on malodorous gas, has large use limitation, has poor degradation capability on multi-component heterocyclic organic matters, and cannot meet the requirement of waste gas treatment. The RCO incineration device has large use limitation of the catalyst, so that the catalyst is easy to poison, the catalyst is inactivated, and the treated waste gas does not reach the standard; the catalytic attenuation speed is high, and the cost for replacing the catalyst is high.
In view of the above, there is a need to develop a new waste water and waste gas treatment scheme for rubber accelerator NS to solve the problems in the prior art.
Disclosure of Invention
The A/O2 biochemical treatment in the invention is developed and improved by combining the characteristics of the wastewater on the basis of the traditional activated sludge method, and the process has better effects on the treatment of wastewater with high toxicity, high concentration and high ammonia nitrogen, has excellent denitrification function, can bear higher ammonia nitrogen load impact, and is particularly suitable for the treatment of the wastewater with high ammonia nitrogen; the composite material has high degradation capability on waste water with high toxicity and certain impact resistance; the sludge amount in the filter is small, the process operation is stable, safe and reliable, and the operation and management are simple and convenient.
Based on the above, the invention provides a comprehensive treatment method for waste water and waste gas of rubber accelerator NS, and the technological method is improved. The method has the advantages of simple and convenient operation and low operation cost, the treated tail gas can reach the emission standard, the aim of comprehensively treating the waste water and the waste gas is fulfilled, and the defects of the prior art are overcome.
One object of the present invention is to provide a method for comprehensively treating waste water and waste gas of rubber accelerator NS, which comprises the following steps:
s1, evaporating and concentrating rubber accelerator NS wastewater, and performing A/O2 biochemical treatment on the obtained concentrated solution to obtain a treated solution;
s2, adding the treatment liquid into a degassing pool, and feeding the nitrifying bacteria liquid into the biological tail gas purification device from the upper part of the biological tail gas purification device through a reflux pump; simultaneously introducing rubber accelerator NS waste gas into the bottom of a biological tail gas purification device to carry out countercurrent spraying with the nitrifying bacteria liquid, and allowing the sprayed nitrifying bacteria liquid to enter an anaerobic tank for pollutant degradation; discharging gas in the biological tail gas purification device;
wherein, the first and the second end of the pipe are connected with each other,
the nitrifying bacterial liquid is an obligate biological bacterial liquid cultured by using NS wastewater;
the degassing pool is connected with an inlet of the reflux pump, and an outlet of the reflux pump is connected to the upper layer of the biological tail gas purification device.
Furthermore, the nitrifying bacteria liquid is obligate biological bacteria cultured by using NS/CBS wastewater, belongs to obligate heterotrophic bacteria, has a good effect on degrading benzothiazole organic matters, benzene series organic matters and non-methane total hydrocarbon organic matters, and can realize the removal efficiency of more than 95%.
Further, the rubber accelerator NS wastewater is high-concentration refractory organic wastewater, and the rubber accelerator NS waste gas is high-air-volume low-concentration or small-air-volume high-concentration organic waste gas.
Further, in step S2, the rubber accelerator NS waste gas includes rubber accelerator NS drying tail gas and rubber accelerator NS production tail gas.
Further, the rubber accelerator NS waste gas is introduced into the bottom of the biological tail gas purification device through a draught fan after being purified by a cloth bag dust removal and washing purification tower.
Further, in step S2, the biological tail gas purification devices are one or more groups.
Further, in the step S1, the COD of the rubber accelerator NS wastewater is 10000-25000 mg/L, and the ammonia nitrogen content is 50-250 mg/L.
Further, in step S2, the organic VOC concentration (main component of tert-butylamine) of the rubber accelerator NS waste gas is 300 to 1000 mg/m 3 。
Further, the washing and purifying tower adopts low-temperature cold water for spraying and washing, and the temperature of the low-temperature cold water is-5 to 10 ℃.
Further, the biological tail gas purification device comprises a defogging layer, a biological filler layer and a gas distribution system.
Furthermore, the demisting layer and the packing layer are respectively provided with an automatic cleaning device from bottom to top, biochemical effluent is used for washing, and the problem of sludge blockage is effectively solved; the biological tail gas purification device adopts a large-aperture spiral spray head or a vortex type spray head in a spray system, so that sludge blockage can be effectively prevented; the filler adopts a porous structure high-efficiency biological filler.
The rubber accelerator NS waste gas is firstly in high-efficiency contact with the drops falling under gravity, and the gas-liquid two phases complete the mass transfer and absorption reaction of the first process; then the gas is folded to the counter-flow section of the biological tail gas purification device and is sent into the biological tail gas purification device by a fan, and the gas is contacted with the bacterial liquid again from bottom to top to complete the mass transfer and absorption reaction of the second process; the gas and the circulating bacterial liquid finish three processes of gas-liquid diffusion, liquid-solid diffusion and biological oxidation of organisms in the process of passing through the biological filler layer, microorganisms in a biological membrane on the surface of the biological filler take gas substances as nutrients, energy is generated in the conversion process, energy is provided for the growth and the propagation of the microorganisms, the conversion of the gas substances is continuously carried out, and the purified gas is discharged at high altitude; the circulating liquid contains fallen biological membranes and microorganisms, and is recycled after being filtered and supplemented with fresh washing liquid, and the biological membranes removed by filtration are converted into sludge and discharged into a bacteria liquid pool.
Further, in the step S2, the reflux quantity of the nitrifying bacteria liquid is 15 to 30 times of the water inlet reflux quantity of the biochemical system.
Further, in the step S2, the pH value of an anaerobic pool in the A/O2 biochemical treatment system is 5~8, and the dissolved oxygen of an aerobic system is 2 to 5 mg/L.
The invention has the following beneficial effects:
1. the invention establishes an efficient wastewater and waste gas comprehensive treatment system, and achieves the purpose of reaching the standard of wastewater and waste gas comprehensive treatment by the combined operation of an A/O2 biochemical treatment process and biotrickling filtration purification.
2. The principle of the process for treating the mixed tail gas is that the low-temperature water spraying absorption and bio-trickling filtration purification absorption process is utilized, the effect of treating the mixed tail gas is achieved while biochemical wastewater is treated, compared with the traditional tail gas treatment process, no additional tail gas treatment device is needed, the equipment investment and the production operation cost are reduced, and the clean production purposes of energy conservation, consumption reduction, pollution reduction and efficiency improvement are achieved.
3. Rubber accelerator NS waste gas is collected in the workshop and is conveyed to a biochemical treatment and purification device through a pipeline, the waste gas is discharged through an air exhaust funnel after reaching the standard, the whole process is closed and controllable, and the device has obvious effects of improving the operating environment of a production workshop and improving the environmental benefits of enterprises.
Detailed Description
In order to more clearly illustrate the technical solution of the present invention, the following examples are given. The starting materials, reactions and work-up procedures which are given in the examples are, unless otherwise stated, those which are customary on the market and are known to the person skilled in the art.
The words "preferred", "preferably", "more preferred", and the like, in the present invention, refer to embodiments of the invention that may provide certain benefits, under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.
It should be understood that other than in any operating examples, or where otherwise indicated, all numbers expressing, for example, quantities of ingredients used in the specification and claims are to be understood as being modified in all instances by the term "about". Accordingly, unless indicated to the contrary, the numerical parameters set forth in the following specification and attached claims are approximations that may vary depending upon the desired properties to be obtained by the present invention.
The meaning of "up and down" in the present invention means that the reader is facing, the upper side of the reader is the upper side, and the lower side of the reader is the lower side, and is not a specific limitation to the mechanism of the device of the present invention.
When a component, element, or layer is referred to as being "on," "bonded to," "connected to," or "coupled to" another element or layer, it may be directly on, bonded to, connected to, or coupled to the other element, or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly coupled to," "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between.. Versus" directly between.. Versus, "" adjacent to "directly adjacent to," etc.). As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The nitrifying bacterial liquid in the embodiment of the invention is an obligate biological bacterial liquid cultured by using NS wastewater.
The degassing tank is connected with an inlet of the reflux pump, an outlet of the reflux pump is connected to the upper layer of the biological tail gas purification device, and the sprayed bacteria liquid enters the anaerobic tank.
The biological tail gas purification device in the embodiment of the invention comprises a defogging layer, a biological filler layer and a gas distribution system.
Example 1
A comprehensive treatment method of rubber accelerator NS wastewater and waste gas comprises the following steps:
s1, evaporating and concentrating rubber accelerator NS wastewater (COD is 17000 mg/L, ammonia nitrogen content is 150 mg/L), and then carrying out A/O2 biochemical treatment on the obtained concentrated solution to obtain a treated solution;
s2, adding the treatment liquid into a degassing pool, and feeding the nitrifying bacteria liquid into the biological tail gas purification device from the upper part of the biological tail gas purification device through a reflux pump; simultaneously, the dry tail gas of rubber accelerator NS and the tail gas of rubber accelerator NS production (the concentration of organic VOC such as tert-butylamine is 700 mg/m) 3 ) After cloth bag dust removal and washing purification by a washing purification tower (low-temperature cold water is adopted for spraying and washing, the temperature is 7 ℃), the water is introduced into the bottom of a biological tail gas purification device through a draught fan to carry out countercurrent spraying with the nitrifying bacteria liquid, and the sprayed nitrifying bacteria liquid enters an anaerobic tank to carry out pollutant degradation; then discharging the gas in the biological tail gas purification device;
wherein the reflux amount of the nitrifying bacteria liquid is 15 times of the reflux amount of the water inlet of the biochemical system; the pH value of the anaerobic pool is 5, and the dissolved oxygen of the aerobic system is 2 mg/L.
Example 2
A comprehensive treatment method of rubber accelerator NS wastewater and waste gas comprises the following steps:
s1, evaporating and concentrating rubber accelerator NS wastewater (COD is 15000 mg/L, ammonia nitrogen content is 135 mg/L), and then carrying out A/O2 biochemical treatment on the obtained concentrated solution to obtain a treated solution;
s2, adding the treatment liquid into a degassing pool, and feeding the nitrifying bacteria liquid into the biological tail gas purification device from the upper part of the biological tail gas purification device through a reflux pump; simultaneously, the dry tail gas of the rubber accelerator NS and the tail gas of the rubber accelerator NS (the concentration of organic VOC such as tert-butylamine is 600 mg/m and the like) production 3 ) After cloth bag dust removal and washing purification by a washing purification tower (low-temperature cold water is adopted for spraying and washing, the temperature is 5 ℃), the water is introduced into the bottom of a biological tail gas purification device through a draught fan to perform countercurrent spraying with the nitrifying bacteria liquid, and the sprayed nitrifying bacteria liquid enters an anaerobic tank to degrade pollutants; then discharging the gas in the biological tail gas purification device;
wherein the reflux amount of the nitrifying bacteria liquid is 30 times of that of the inlet water; the pH value of the anaerobic pool is 6, and the dissolved oxygen of the aerobic system is 4 mg/L.
Test example
The test method comprises the following steps:
the comprehensive treatment method for rubber accelerator NS waste water and waste gas of example 1 was further tested. The treatment process of example 1 is adopted to treat 4 batches of rubber accelerator NS wastewater and waste gas, and the pollutant index contents of COD, VOC and the like of the wastewater and the waste gas before and after treatment are detected.
The test results are shown in table 1.
Table 1 example 1 test results
According to the table 1, the comprehensive treatment method for the waste water and gas of the rubber accelerator NS has a good treatment effect, high removal rate of pollutants in the waste water and gas of the rubber accelerator NS, stable effect and good application prospect.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A comprehensive treatment method for waste water and gas of rubber accelerator NS is characterized by comprising the following steps:
s1, evaporating and concentrating rubber accelerator NS wastewater, and performing A/O2 biochemical treatment on the obtained evaporated water to obtain a treatment solution;
s2, adding the treatment liquid into a degassing pool, and feeding the nitrifying bacteria liquid into the biological tail gas purification device from the upper part of the biological tail gas purification device through a reflux pump; simultaneously introducing rubber accelerator NS waste gas into the bottom of a biological tail gas purification device to carry out countercurrent spraying with the nitrifying bacteria liquid, and allowing the sprayed nitrifying bacteria liquid to enter an anaerobic tank for pollutant degradation; discharging gas in the biological tail gas purification device;
wherein the content of the first and second substances,
the nitrifying bacterial liquid is an obligate biological bacterial liquid cultured by using NS wastewater;
the degassing pool is connected with an inlet of the reflux pump, and an outlet of the reflux pump is connected to the upper layer of the biological tail gas purification device.
2. The method of claim 1, wherein in step S2, the rubber accelerator NS waste gas comprises rubber accelerator NS dry tail gas and rubber accelerator NS production tail gas.
3. The comprehensive treatment method of rubber accelerator NS wastewater and waste gas as claimed in claim 2, wherein the rubber accelerator NS waste gas is introduced into the bottom of the biological tail gas purification device through an induced draft fan after being purified by a cloth bag dust removal and washing purification tower.
4. The method for comprehensively treating waste water and waste gas of rubber accelerator NS as claimed in claim 3, wherein in step S2, the biological tail gas purification device is one or more groups.
5. The comprehensive treatment method of waste water and waste gas of rubber accelerator NS according to claim 1, wherein in step S1, COD of the waste water of the rubber accelerator NS is 10000-25000 mg/L, and the content of ammonia nitrogen is 50-250 mg/L.
6. The comprehensive treatment method of waste water and gas of rubber accelerator NS according to claim 1, wherein in step S2, the organic VOC concentration of waste gas of rubber accelerator NS is 300 to 1000 mg/m 3 。
7. The comprehensive treatment method of rubber accelerator NS wastewater and waste gas as claimed in claim 3, wherein the washing and purifying tower is sprayed and washed with low-temperature cold water at a temperature of-5 to 10 ℃.
8. The comprehensive treatment method for waste water and gas of rubber accelerator NS as claimed in claim 1, wherein the biological tail gas purification device comprises a defogging layer, a biological filler layer and a gas distribution system.
9. The comprehensive treatment method for waste water and waste gas of the rubber accelerator NS as claimed in claim 1, wherein in the step S2, the reflux quantity of the nitrifying bacteria liquid is 15 to 30 times of the reflux quantity of water inlet of a biochemical system.
10. The comprehensive treatment method of rubber accelerator NS wastewater and exhaust gas as claimed in claim 1, wherein in step S2, the pH of an anaerobic pool in the A/O2 biochemical treatment system is 5~8, and the dissolved oxygen of an aerobic system is 2 to 5 mg/L.
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