CN111825235A - System for recycling acrylamide production wastewater for producing papermaking dry strength agent - Google Patents
System for recycling acrylamide production wastewater for producing papermaking dry strength agent Download PDFInfo
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- CN111825235A CN111825235A CN201911154077.3A CN201911154077A CN111825235A CN 111825235 A CN111825235 A CN 111825235A CN 201911154077 A CN201911154077 A CN 201911154077A CN 111825235 A CN111825235 A CN 111825235A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 50
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000004064 recycling Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 40
- 239000010865 sewage Substances 0.000 claims abstract description 33
- 230000015271 coagulation Effects 0.000 claims description 42
- 238000005345 coagulation Methods 0.000 claims description 42
- 239000000243 solution Substances 0.000 claims description 27
- 238000004062 sedimentation Methods 0.000 claims description 19
- 239000003712 decolorant Substances 0.000 claims description 12
- 238000009287 sand filtration Methods 0.000 claims description 11
- 230000001112 coagulating effect Effects 0.000 claims description 5
- 230000002829 reductive effect Effects 0.000 claims description 4
- 239000003929 acidic solution Substances 0.000 claims description 3
- 239000012670 alkaline solution Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 8
- 239000007787 solid Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000001376 precipitating effect Effects 0.000 abstract description 4
- 102000004169 proteins and genes Human genes 0.000 abstract description 4
- 108090000623 proteins and genes Proteins 0.000 abstract description 4
- 230000003311 flocculating effect Effects 0.000 abstract description 3
- 150000002500 ions Chemical class 0.000 abstract description 2
- 230000001590 oxidative effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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Classifications
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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
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a system for recycling acrylamide production wastewater for producing papermaking dry strength agent, which comprises a sewage tank, a filtering part and a recycling water tank, wherein the sewage tank, the filtering part and the recycling water tank are sequentially connected. The method comprises the steps of reducing the chromaticity of sewage to below 3 ℃ after oxidizing, decolorizing, flocculating, precipitating and filtering the wastewater produced by acrylamide, separating and removing insoluble solids such as protein and the like, and reusing the insoluble solids in water for producing dry strength agent; the problem of water consumption of the dry strength agent is solved, the sewage treatment cost is also solved, and the method has great economic value and social value; meanwhile, the recycled water is used as the water for producing the dry strength agent, and the water contains part of acrylamide and ions, so that the performance of the synthesized dry strength agent is better than that of the dry strength agent made of pure water.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a system for reusing acrylamide production wastewater in producing papermaking dry strength agents.
Background
Dry strength agents are an important class of chemicals in the paper industry to increase paper strength, and are commonly used to compensate for the decrease in paper strength caused by the addition of fillers or low grade fibers (e.g., recycled fibers). Most of the dry strength agents on the market at present are prepared by polymerizing acrylamide and various small materials.
The main components of the wastewater produced by the biological method of acrylamide comprise acrylamide, partial anions and cations, pigments, proteins and solid impurities, the conventional method of the wastewater is to discharge the wastewater after biochemical treatment, and the treatment of the wastewater requires a large amount of economic cost and wastes a large amount of resources.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the system can recover the wastewater generated by producing acrylamide, remove solid impurities such as pigment, protein and the like in the acrylamide wastewater, and enable the wastewater to be used as a synthetic component of a dry strength agent and be reused as the acrylamide production wastewater of process water for producing the dry strength agent for producing papermaking.
The technical scheme adopted by the invention is as follows: the utility model provides a system for acrylamide waste water is retrieved and is used for producing papermaking dry strength agent, includes sewage case, filter house, retrieval and utilization water tank, sewage case, filter house, retrieval and utilization water tank link to each other in proper order, its characterized in that, the filter house is including coagulating portion, sedimentation tank, clean water jar, sand filtration jar, coagulating portion, sedimentation tank, clean water jar, sand filtration jar link to each other in proper order.
After adopting the structure, compared with the prior art, the system for reusing the acrylamide production wastewater to produce the papermaking dry strength agent has the following advantages: the method comprises the steps of reducing the chromaticity of sewage to below 3 ℃ after oxidizing, decolorizing, flocculating, precipitating and filtering the wastewater produced by acrylamide, separating and removing insoluble solids such as protein and the like, and reusing the insoluble solids in water for producing dry strength agent; the problem of water consumption of the dry strength agent is solved, the sewage treatment cost is also solved, and the method has great economic value and social value; meanwhile, the recycled water is used as the water for producing the dry strength agent, and the water contains part of acrylamide and ions, so that the performance of the synthesized dry strength agent is better than that of the dry strength agent made of pure water.
Preferably, the coagulation part comprises a first coagulation tank, a second coagulation tank and a third coagulation tank, wherein the first coagulation tank is internally provided with an acid-base tank and a decolorant tank, the second coagulation tank is internally provided with a PAC tank, the third coagulation tank is internally provided with a PAM tank, and the first coagulation tank, the second coagulation tank and the third coagulation tank are sequentially connected. The first coagulation tank is used for adjusting the pH value of the acrylamide production wastewater and carrying out oxidation decoloration by using a decolorant; the second coagulation tank is used for carrying out PAC coagulation on the acrylamide production wastewater; and the third coagulation tank is used for performing PAM flocculation on the acrylamide production wastewater.
Preferably, the acid-base tank is connected with a first metering pump, the decolorizing agent tank is connected with a second metering pump, the PAC tank is connected with a third metering pump, and the PAM tank is connected with a fourth metering pump. The first metering pump is used for controlling the dosage of the solution in the acid-base tank, so that the PH of the acrylamide production wastewater can be well adjusted to 6.5-8.5; the second metering pump is used for controlling the using amount of the solution in the decoloring agent tank and reducing the chroma of the wastewater to be below 3 ℃; the third metering pump is used for controlling the using amount of the solution in the PAC tank, so that the coagulation effect of the wastewater is ensured; the fourth metering pump is used for controlling the using amount of the solution in the PAM tank, so that the flocculation effect of the wastewater is ensured; the metering pump ensures accurate dosage of various solutions, and the acrylamide production wastewater is well treated.
Preferably, the upper part of the sedimentation tank is provided with a first outlet, and the first outlet is connected with the clean water tank. The waste water in the sedimentation tank is settled, and the clear liquid flows to the clear water tank through the first outlet on the upper layer of the sedimentation tank.
Preferably, a second outlet is formed in the bottom of the sedimentation tank, a second pump is connected to the second outlet, the second pump is connected with a filter press, the filter press is connected with a sewage ditch and a clean water tank, and the clean water tank is connected with the clean water tank through a third pump. And precipitating the wastewater in the sedimentation tank, precipitating the concentrated solution to the bottom of the sedimentation tank, conveying the concentrated solution to a filter press for filter pressing under the action of a second pump, collecting clear solution obtained after filter pressing to a clear water tank, and discharging the residual waste solution to a sewage ditch.
Preferably, the acid-base tank is an acidic solution or an alkaline solution. When the sewage is acidic, the sewage is adjusted by an alkaline solution, and when the sewage is alkaline, the sewage is adjusted by an acidic solution, so that the pH value of the sewage is adjusted to 6.5-8.5.
Preferably, the decoloring agent tank is filled with a reductive decoloring agent, and the concentration of the decoloring agent is 1-3%. The concentration of the decolorant solution is limited, and the good decoloration effect of the wastewater is ensured.
Preferably, the concentration of the PAC solution in the PAC tank is 1 to 4%. The concentration of the PAC solution is limited, and the coagulation effect of the wastewater solution is ensured to be good.
Preferably, the concentration of the PAM solution in the PAM tank is 1-2 per mill. The concentration of the PAM solution is limited, and the flocculation effect of the wastewater solution is ensured to be good.
Preferably, the sand filtering tank is connected with the sewage tank. The sand filtration tank is connected with the sewage tank, when the sand filtration tank is backflushed, the backflush water of the sand filtration tank is communicated back to the sewage tank, and the sand filtration tank can be treated again, so that waste is reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of a system for recycling acrylamide production wastewater for producing papermaking dry strength agents.
Wherein, 1, a sewage tank; 2. a sewage ditch; 3. a first pump; 4. a coagulation section; 4.1, a first coagulation tank; 4.2, a second coagulation tank; 4.3, a third coagulation tank; 5. a sedimentation tank; 5.1, a first outlet; 5.2, a second outlet; 6. a second pump; 7. a filter press; 8. a clean water tank; 9. a third pump; 10. a clean water tank; 11. a fourth pump; 12. a sand filtration tank; 13. a recycling water tank; 14; a fifth pump; 15. an acid-base tank; 16. a decolorant tank; 17. a PAC tank; 18. a PAM tank; 19. a first metering pump; 20. a second metering pump; 21. a third metering pump; 22. and a fourth metering pump.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
The invention provides a system for reusing acrylamide production wastewater to produce papermaking dry strength agent, which comprises a sewage tank 1, a filtering part and a reuse water tank 13, wherein the filtering part comprises a coagulation part 4, a sedimentation tank 5, a clean water tank 10 and a sand filter tank 12; the sewage tank 1 is connected with the coagulation part 4 through the first pump 3, the coagulation part 4 is connected with the sedimentation tank 5, a first outlet 5.1 of the sedimentation tank 5 is connected with the clean water tank 10, a second outlet 5.1 of the sedimentation tank 5 is connected to the filter press 7 through the second pump 6, the filter press 7 is respectively connected with the sewage ditch 2 and the clean water tank 8, the clean water tank 8 is connected with the clean water tank 10 through the third pump 9, the clean water tank 10 is connected with the sand filter tank 12 through the fourth pump 11, and the sand filter tank 12 is connected with the reuse water tank 13.
The acid-base tank 15 is connected with the first coagulation tank 4.1 through a first metering pump 19, the decolorant tank 16 is connected with the first coagulation tank 4.1 through a second metering pump 20, the PAC tank 17 is connected with the second coagulation tank 4.2 through a third metering pump 21, and the PAM tank 18 is connected with the third coagulation tank 4.3 through a fourth metering pump 22.
The working principle is that the acrylamide production wastewater is continuously conveyed to a coagulation part 4 through a first pump 3 in a sewage tank 1, sequentially passes through a first coagulation tank 4.1, a second coagulation tank 4.2 and a third coagulation tank 4.3, and the pH value and the chromaticity of the wastewater are adjusted under the action of an acid-base tank 15 and a decolorant tank 16, so that the pH value of the wastewater reaches 6.5-8.5, and the chromaticity of the wastewater is reduced to be below 3 ℃; coagulating the PAC under the action of a PAC tank 17; it was flocculated by the action of a PAM tank 18. The wastewater which passes through the coagulation part 4 enters the sedimentation tank 5 for sedimentation, the clear wastewater which is sedimentated overflows to a clear water tank 10 through a first outlet 5.1 at the upper layer, the concentrated solution at the lower layer is delivered to a filter press 7 for filter pressing under the action of a second pump 6, the clear water after filter pressing is collected in a clear water tank 8 and is delivered to the clear water tank 10 through a third pump 9, and the rest waste liquid is poured into a sewage ditch 2. The clear liquid in the clear water tank 10 is acted by a fourth pump 11, conveyed into a sand filter tank 12 for filtering, and the filtrate is collected into a reuse water tank 13, so that the clear liquid can be conveyed to a dry strength agent workshop for use through a fifth pump 14.
In this embodiment, when the PH of the wastewater is acidic, a 30% liquid caustic soda solution is used in the acid-base tank 15; when the pH of the wastewater is alkaline, a 15% hydrochloric acid solution is used in the acid-base tank 15 to adjust the pH of the wastewater to 6.5-8.5, preferably to neutral 7. A reducing decolorant is selected from a decolorant tank 16, the decolorant is prepared into a solution with the concentration of 2 percent, and the adding amount of the decolorant solution is 0.5 to 5 percent, in the embodiment, 2 percent; PAC solution in the PAC tank 17 is prepared to have the concentration of 2 percent, and the adding amount of the PAC solution is 3 to 10 percent and is 5 percent in the embodiment; the PAM solution in the PAM tank 18 was prepared to a concentration of 1% o, and the amount of the PAM solution added was 1 to 3%, in this example 2%. After the water quality is changed, the adding amount needs to be determined by a small test, and the decolorizing and flocculating settling effects are taken as the standard.
The number of the sewage tanks 1 is at least one, and two sewage tanks can be arranged, and the sewage tanks can be alternately used.
The backwash water of the sand filtration tank 12 can be returned to the sewage tank 1 for treatment again, avoiding waste.
The foregoing has described preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary, and various changes made within the scope of the independent claims of the present invention are within the scope of the present invention.
Claims (10)
1. The utility model provides a system for acrylamide waste water is retrieved and is used for producing papermaking dry strength agent, includes sewage case (1), filter house, retrieval and utilization water tank (13), sewage case (1), filter house, retrieval and utilization water tank (13) link to each other in proper order, its characterized in that, the filter house is including coagulating part (4), sedimentation tank (5), clean water jar (10), sand filtration jar (12), coagulating part (4), sedimentation tank (5), clean water jar (10), sand filtration jar (12) link to each other in proper order.
2. The system for recycling the acrylamide production wastewater for producing the papermaking dry strength agent according to claim 1, wherein the coagulation part (4) comprises a first coagulation tank (4.1), a second coagulation tank (4.2) and a third coagulation tank (4.3), an acid-base tank (15) and a decolorant tank (16) are arranged in the first coagulation tank (4.1), a PAC tank (17) is arranged in the second coagulation tank (4.2), a PAM tank (18) is arranged in the third coagulation tank (4.3), and the first coagulation tank (4.1), the second coagulation tank (4.2) and the third coagulation tank (4.3) are sequentially connected.
3. The system for recycling the wastewater generated in the acrylamide production process for producing the dry strength agent for papermaking as claimed in claim 2, wherein the acid-base tank (15) is connected with a first metering pump (19), the decolorant tank (16) is connected with a second metering pump (20), the PAC tank (17) is connected with a third metering pump (21), and the PAM tank (18) is connected with a fourth metering pump (22).
4. The system for recycling the acrylamide production wastewater for producing the papermaking dry strength agent according to the claim 1, characterized in that the upper part of the sedimentation tank (5) is provided with a first outlet (5.1), and the first outlet (5.1) is connected with the clean water tank (10).
5. The system for recycling the wastewater generated in the acrylamide production process for producing the dry strength agent for papermaking according to claim 4, wherein a second outlet (5.2) is formed in the bottom of the sedimentation tank (5), the second outlet (5.2) is connected with a second pump (6), the second pump (6) is connected with a filter press (7), the filter press (7) is connected with a sewage ditch (2) and a clean water tank (8), and the clean water tank (8) is connected with the clean water tank (10) through a third pump (9).
6. The system for recycling the acrylamide production wastewater for producing the papermaking dry strength agent according to the claim 2, characterized in that the acid-base tank (15) is an acidic solution or an alkaline solution.
7. The system for recycling the acrylamide production wastewater for producing the papermaking dry strength agent as claimed in claim 2, wherein a reductive decolorizing agent is contained in the decolorizing agent tank (16), and the decolorizing agent concentration is 1-3%.
8. The system for recycling acrylamide production wastewater for producing papermaking dry strength agent as claimed in claim 2, wherein the concentration of PAC solution in the PAC tank (17) is 1-4%.
9. The system for recycling the wastewater generated in the acrylamide production for producing the dry strength agent for papermaking as claimed in claim 2, wherein the concentration of the PAM solution in the PAM tank (18) is 1-2 ‰.
10. The system for recycling the acrylamide production wastewater for producing papermaking dry strength agent as recited in claim 1, wherein the sand filtration tank (12) is connected with the sewage tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911154077.3A CN111825235B (en) | 2019-11-22 | System for recycling acrylamide production wastewater for producing papermaking dry strength agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911154077.3A CN111825235B (en) | 2019-11-22 | System for recycling acrylamide production wastewater for producing papermaking dry strength agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111825235A true CN111825235A (en) | 2020-10-27 |
| CN111825235B CN111825235B (en) | 2024-11-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114212952A (en) * | 2021-12-20 | 2022-03-22 | 浙江鑫甬生物化工股份有限公司 | Device and method for treating sewage by using production wastewater of dry strength agent |
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| CN106746008A (en) * | 2016-12-29 | 2017-05-31 | 上海铱钶环保科技有限公司 | Mine tailing wastewater processing cycle system and technique containing PAM |
| CN211339095U (en) * | 2019-11-22 | 2020-08-25 | 浙江鑫甬生物化工股份有限公司 | System for recycling acrylamide production wastewater for producing papermaking dry strength agent |
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| CN101041536A (en) * | 2007-04-30 | 2007-09-26 | 李保标 | Integrated waste water treating machine |
| CN101973653A (en) * | 2010-09-30 | 2011-02-16 | 南京大学 | Method for treating high-concentration PAM (Polyacrylamide) production wastewater by using composite coagulation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114212952A (en) * | 2021-12-20 | 2022-03-22 | 浙江鑫甬生物化工股份有限公司 | Device and method for treating sewage by using production wastewater of dry strength agent |
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