CN216129472U - A sewage treatment system for TMP production - Google Patents
A sewage treatment system for TMP production Download PDFInfo
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- CN216129472U CN216129472U CN202122009927.XU CN202122009927U CN216129472U CN 216129472 U CN216129472 U CN 216129472U CN 202122009927 U CN202122009927 U CN 202122009927U CN 216129472 U CN216129472 U CN 216129472U
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Abstract
The utility model provides a sewage treatment system for TMP production, which combines physicochemical treatment and biochemical treatment processes, and firstly removes most of oil and formaldehyde through the physicochemical process, eliminates toxic substances in the wastewater and ensures the safe operation of the biochemical system; then carrying out deepening treatment by a biochemical process and discharging after reaching the standard; the biochemical treatment process comprises three treatment links of hydrolysis, anaerobism and aerobism, and the biodegradability of the wastewater is improved by preliminarily treating macromolecular organic matters in the wastewater through the hydrolysis process; the anaerobic process is an advanced treatment of a hydrolysis process, various complex organic matters in the wastewater are decomposed and converted into substances such as methane, carbon dioxide and the like under the action of anaerobic microorganisms under the condition of no molecular oxygen, and the aerobic process adopts an activated sludge method to decompose organic pollutants into micromolecular organic matters and oxidize and decompose the micromolecular organic matters to form carbon dioxide and water. The treatment system effectively gives consideration to the treatment efficiency and the purification effect, and has extremely high popularization and application values.
Description
Technical Field
The utility model belongs to the field of sewage treatment, and particularly relates to a sewage treatment system for TMP production.
Background
Trimethylolpropane (TMP) is an important fine chemical product and is also a commonly used chain extender in the resin industry. Trimethylolpropane may react with organic acids to form monoesters or polyesters, aldehydes and ketones to form acetals and ketals, diisocyanates to form carbamates, and the like. Trimethylolpropane is mainly used in the fields of alkyd resin, polyurethane, unsaturated resin, polyester resin, paint and the like; the compound is used for synthesizing aviation lubricating oil, plasticizer, surfactant, wetting agent, explosive, printing ink and the like; it is used as textile auxiliary and heat stabilizer for PVC resin.
The industrial production process of the trimethylolpropane comprises the following steps: firstly, two molecules of formaldehyde and n-butyl aldehyde are subjected to aldol condensation under the catalysis of strong base to generate 2, 2-dimethylolbutanal, then under the catalysis of strong base, the 2, 2-dimethylolbutanal continuously performs a Cannizzaro reaction with formaldehyde, the n-butyl aldehyde is reduced to trimethylolpropane, and the formaldehyde is oxidized to formic acid.
The wastewater in TMP production mainly has the following characteristics: the organic matter content is high, the components are various, and the toxic substances (such as formaldehyde, isooctanol and the like) have great harm to a biochemical treatment system, so that the wastewater treatment is difficult, and the effluent index is difficult to reach the standard to influence the normal production operation of an enterprise.
Therefore, it is necessary to invent a sewage treatment system for TMP production with high treatment efficiency and stable operation efficiency.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the sewage treatment system for TMP production, which has high treatment efficiency and stable operation efficiency.
In order to achieve the purpose, the utility model adopts the following technical scheme: the sewage treatment system for TMP production comprises a pretreatment unit and a biochemical treatment unit; the pretreatment unit comprises an oil separation tank, a formaldehyde adjusting tank, a condensation reaction tank, a first sedimentation tank and a comprehensive adjusting tank which are sequentially connected; the biochemical treatment unit comprises an air floatation device, a second sedimentation tank, a hydrolysis acidification tank, a buffer tank, an IC internal circulation reactor, a third sedimentation tank, a contact oxidation tank, a secondary sedimentation tank and a clean water tank which are sequentially connected; and a third lift pump and a plate heat exchanger are arranged between the comprehensive adjusting tank and the air floatation device.
Further, the sludge generated by the IC internal circulation reactor is returned and conveyed into the hydrolysis acidification tank.
Further, the third sedimentation tank carries out reflux conveying to the IC internal circulation reactor through an anaerobic reflux pump.
Further, the secondary sedimentation tank carries out backflow conveying to the contact oxidation tank through a sludge backflow pump.
And further, the clean water tank carries out backflow conveying to the comprehensive adjusting tank through a fifth lifting pump.
Further, anaerobic strain sludge is arranged in the hydrolysis acidification tank; and a stirring facility is arranged in the hydrolysis acidification tank.
Further, the contact oxidation tank comprises a tank body; the inside of the tank body is provided with a filler; an aeration device is arranged below the filler; the aeration device comprises an air supply pipeline, a first aeration pipe and a second aeration pipe; the gas supply pipeline is distributed at the bottom of the tank body in a vein shape; the first aeration pipes are communicated and uniformly distributed at the top of the air supply pipeline; the second aeration pipes are communicated with and arranged at two sides of the air supply pipeline; the second aeration pipe is attached to and connected with the side wall of the tank body; the distribution density of the second aeration pipe is gradually increased along the flowing direction of sewage in the tank body.
Further, the aeration path of the second aeration pipe is directed to the center of the water flow.
Further, the aeration path of the second aeration tube is deflected in an upstream direction.
Further, the air supply line includes a main pipe and a branch pipe; the main pipe is arranged at the center of the bottom of the tank body in parallel along a water flow path; the surface of the main pipe is provided with a switching pipe; the adapter tubes are spirally distributed on the surface of the main tube; one end of the branch pipe is communicated with the adapter pipe, and the other end of the branch pipe supplies air for the first aeration pipe or the second aeration pipe.
Compared with the prior art, the utility model has the beneficial effects that:
(1) the sewage treatment system for TMP production disclosed by the utility model combines the physicochemical treatment process and the biochemical treatment process, most of oil and formaldehyde are removed through the physicochemical process, toxic substances in the wastewater are eliminated, the operation safety of the biochemical system is ensured, the biochemical treatment process is used for carrying out deepening treatment and then the wastewater reaches the standard and is discharged, and the treatment efficiency and the treatment effect are considered.
(2) The sludge of the IC internal circulation reactor of the utility model flows back to the hydrolysis tank through the sludge return pipeline, and the activated sludge is introduced to improve the biodegradability of the wastewater; the secondary sedimentation tank flows back to the contact oxidation tank through a sludge return pipeline, so that the biomass can be increased, and the removal effect can be enhanced; the clean water tank flows back to the comprehensive adjusting tank through the waste water backflow pipeline, so that the raw water can be diluted and adjusted, the process operation of a biochemical system is stabilized, and the clear effluent is ensured and is discharged after reaching the standard.
(3) Anaerobic strain sludge is added into the hydrolysis acidification tank, and a plug flow stirring facility is used for performing biochemical treatment on high molecular organic matters in TMP wastewater, so that the treatment efficiency of the IC internal circulation anaerobic reactor is improved.
(4) According to the contact oxidation tank, the first aeration pipe and the second aeration pipe are matched with each other to increase oxygen, so that the oxygen content in the tank is uniformly increased, and the biological treatment effect in the tank is further improved.
Drawings
FIG. 1 is a flow chart of TMP sewage treatment;
FIG. 2 is a schematic structural view of an aeration apparatus;
fig. 3 is a schematic distribution diagram of the adapter tubes.
In the drawings, the components represented by the respective reference numerals are listed below:
1. an oil separation tank, 2, a formaldehyde adjusting tank, 3, a condensation reaction tank, 4, a first sedimentation tank, 5, a comprehensive adjusting tank, 6, an air flotation device, 7, a second sedimentation tank, 8, a hydrolysis acidification tank, 9, a buffer tank, 10, an IC internal circulation reactor, 11, a third sedimentation tank, 12, a contact oxidation tank, 121, a tank body, 13, a second sedimentation tank, 14, a clean water tank, 15, a first lift pump, 16, a second lift pump, 17, a third lift pump, 18, a fourth lift pump, 19, an anaerobic reflux pump, 20, a sludge reflux pump, 21, a fifth lift pump, 22, a plate heat exchanger, 23, an aeration device, 231, an air supply pipeline, 232, a first aeration pipe, 233, a second aeration pipe, 201, a main pipe, 202, a branch pipe, 203 and a transfer pipe.
Detailed Description
The present invention is further described in detail below with reference to specific examples so that those skilled in the art can more clearly understand the present invention.
As shown in FIG. 1, the sewage treatment system for TMP production comprises a pretreatment unit and a biochemical treatment unit; the pretreatment unit comprises an oil separation tank 1, a formaldehyde adjusting tank 2, a condensation reaction tank 3, a first sedimentation tank 4 and a comprehensive adjusting tank 5 which are sequentially connected; the biochemical treatment unit comprises an air floatation device 6, a second sedimentation tank 7, a hydrolysis acidification tank 8, a buffer tank 9, an IC internal circulation reactor 10, a third sedimentation tank 11, a contact oxidation tank 12, a secondary sedimentation tank 13 and a clean water tank 14 which are sequentially connected; a third lift pump 17 and a plate heat exchanger 22 are arranged between the comprehensive adjusting tank 5 and the air floatation device 6.
The system combines physicochemical treatment and biochemical treatment processes, and firstly removes most of oil and formaldehyde through the physicochemical process, eliminates toxic substances in wastewater and ensures the safe operation of the biochemical system; then carrying out deepening treatment by a biochemical process and discharging after reaching the standard; the biochemical treatment process comprises three treatment links of hydrolysis, anaerobism and aerobism, and the biodegradability of the wastewater is improved by preliminarily treating macromolecular organic matters in the wastewater through the hydrolysis process; the anaerobic process is an advanced treatment of a hydrolysis process, various complex organic matters in the wastewater are decomposed and converted into substances such as methane, carbon dioxide and the like under the action of anaerobic microorganisms under the condition of no molecular oxygen, and the aerobic process adopts an activated sludge method to decompose organic pollutants into micromolecular organic matters and oxidize and decompose the micromolecular organic matters to form carbon dioxide and water; the physicochemical treatment of the pretreatment unit can obviously improve the treatment efficiency, and the biochemical treatment unit ensures the whole treatment effect.
The formaldehyde adjusting tank 2 is communicated with the condensation reaction tank 3 through a first lifting pump 15; the condensation reaction tank 3 is communicated with the first sedimentation tank 4 through a second lift pump 16; the buffer tank 9 is communicated with the IC internal circulation reactor 10 through a fourth lift pump 18. The pump equipment can obviously improve the transfer speed of materials among all working procedures, thereby improving the overall treatment efficiency.
The sludge generated by the IC internal circulation reactor 10 is returned and conveyed into the hydrolysis acidification tank 8; the third sedimentation tank 11 is in reflux delivery to the IC internal circulation reactor 10 through an anaerobic reflux pump 19.
The biochemical property of the waste water can be improved by introducing the activated sludge into the hydrolytic acidification tank 8, and the reflux circulation times can be dynamically adjusted according to the material content of different batches by sending the sludge in the third sedimentation tank 11 back to the IC internal circulation reactor 10, so that the optimal biochemical treatment effect is achieved.
The secondary sedimentation tank 13 is returned and conveyed to the contact oxidation tank 12 through a sludge return pump 20. The biomass can be increased by refluxing, and the removal effect can be enhanced.
The clean water tank 14 is returned to the integrated adjusting tank 5 by a fifth lift pump 21. The raw water can be diluted and adjusted through backflow, the process operation of a biochemical system is stabilized, and the effluent is guaranteed to be clear and discharged after reaching the standard.
Anaerobic strain sludge is arranged in the hydrolysis acidification tank 8; and a stirring facility is arranged in the hydrolysis acidification tank 8. The hydrolysis acidification tank 8 is used for carrying out biochemical treatment on high molecular organic matters in the TMP wastewater, so that the treatment efficiency of the IC internal circulation anaerobic reactor is improved.
As shown in fig. 2 and 3, the contact oxidation tank 12 includes a tank body 121; a filler 122 is arranged inside the tank body 121; an aeration device 23 is arranged below the filler 122; the aeration device 23 comprises an air supply pipeline 231, a first aeration pipe 232 and a second aeration pipe 233; the gas supply pipeline 231 is distributed at the bottom of the tank body 121 in a vein shape; the first aeration pipes 232 are communicated and uniformly distributed at the top of the air supply pipeline 231; the second aeration pipes 233 are communicated with and arranged at two sides of the air supply pipeline 231; the second aeration pipe 233 is attached to the side wall of the tank body 121; the distribution density of the second aeration pipe 233 is gradually increased along the flowing direction of the sewage in the tank body 121.
The aeration device 23 has the function of continuously supplementing oxygen into the tank, thereby improving the treatment efficiency of microorganisms in the filler and enhancing the treatment capacity of the contact oxidation tank 12; the first aeration pipe 232 emphasizes the conventional oxygenation on the central area in the tank, and the second aeration pipe 233 can overcome the problem of insufficient oxygen content at the edge of the tank by the supplementary oxygenation on the side walls at two sides, so that the utilization rate of seasonings is obviously improved; meanwhile, oxygen sprayed from the aeration pipes continuously floats and dissipates while being consumed by reaction, so that oxygen at the downstream is more seriously dissipated, and the shortage of oxygen content at the downstream can be effectively made up by increasing the distribution density of the second aeration pipes 233, so that the filler is in contact with sewage to maintain efficient reaction.
The aeration path of the second aeration pipe 233 points to the center of the water flow, so that the action area of the second aeration pipe 233 and the second aeration pipe 232 are partially overlapped, and the fault tolerance capability in response to the local faults such as blockage is enhanced.
The aeration path of the second aeration pipe 233 is deflected in the upstream direction, so that a partial flow blocking effect can be achieved, the retention time of sewage in the tank can be increased, a certain turbulent flow can be generated locally, the contact effect between the sewage and the filler can be improved, and the reaction efficiency can be further improved.
The air supply pipeline 231 comprises a main pipe 201 and a branch pipe 202; the main pipe 201 is arranged in parallel at the bottom center of the tank body 121 along the water flow path; the surface of the main pipe 201 is provided with an adapter pipe 203; the adapter tubes 203 are spirally distributed on the surface of the main tube 201; one end of the branch pipe 202 is communicated with the adapter pipe 203, and the other end of the branch pipe supplies air to the first aeration pipe 232 or the second aeration pipe 233.
The dashed lines in fig. 3 represent the distribution paths of the adapter tubes 203 that are not visible from the back; through the spiral distribution mode, the distribution density of the branch pipes can be flexibly increased and decreased by matching with the branch pipes 202 adopting the hoses, so that the process requirements are met. The adapter tube is sealed by arranging a valve when not connected.
The overall working process of the system is as follows: an oil separation tank 1 separates oil and water of incoming water, then the water phase enters a formaldehyde adjusting tank 2, a submersible stirrer is arranged in the formaldehyde adjusting tank 2, the PH is adjusted to a required value and then is sent into a condensation reaction tank 3 through a first lifting pump 15, a plug flow stirring and steam heating device is arranged in the condensation reaction tank 3, the reacted effluent enters a first sedimentation tank 4 through a second lifting pump 16 for mud-water separation, the water phase enters a comprehensive adjusting tank 5, the submersible stirrer and an acid and alkali dosing port are arranged in the comprehensive adjusting tank 5 for adjusting the PH value of the water, the adjusted water quality is pressurized through a plate type heat exchanger 22 through a third lifting pump 17 and then enters an air flotation device 6 for removing oil phase again, the water phase sequentially flows into a second sedimentation tank 7, a hydrolysis acidification tank 8 and then enters a buffer tank 9, the incoming water of the buffer tank 9 is sent into an IC internal circulation reactor 10 through a fourth lifting pump 18, sludge in anaerobic bacteria is dosed in the IC internal circulation reactor 10, and a circulation system is established, the water after the reaction treatment enters a third sedimentation tank 11, sludge in the third sedimentation tank 11 circulates into an IC internal circulation reactor 10, the water discharged from the third sedimentation tank 11 sequentially enters a contact oxidation tank 12, a secondary sedimentation tank 13 and a clean water tank 14 and then is discharged after reaching the standard, the sludge in the secondary sedimentation tank 13 can flow back into the contact oxidation tank 12 through a sludge reflux pump 20, and the wastewater in the clean water tank 14 can flow back into a comprehensive regulation tank 5 through a fifth lift pump 21 to regulate the water quality of the raw water.
The specific treatment process comprises the following steps:
1. TMP sewage enters an oil separation tank 1 for oil-water separation, an oil phase is subjected to recovery of a water phase and enters a formaldehyde adjusting tank 2 for adjustment, the pH is 10-13, and the flow rate is 30m 3/h;
2. feeding the wastewater subjected to pH adjustment into a condensation reaction tank 3, heating to 60-80 ℃, adding a lime catalyst, reacting for more than 2 hours, and feeding the wastewater subjected to reaction into a first sedimentation tank 4 after heat recovery in a formaldehyde adjustment tank 2;
3. the wastewater in the first sedimentation tank 4 is sent into a comprehensive regulating tank 5 for water quality regulation, the PH is 6-8, the COD is less than or equal to 10000mg/l, the regulated wastewater enters an air floatation device 6, and the flow rate is 35m 3/h;
4. the water coming from the air flotation device 6 sequentially enters a second sedimentation tank 7, a hydrolysis acidification tank 8 and a buffer tank 9 and then enters an IC internal circulation reactor 10, and the flow rate is 35m 3/h;
5. the effluent of the IC internal circulation reactor 10 is sent to a third sedimentation tank 11, and the bottom of the third sedimentation tank 11 is sent into the IC internal circulation reactor 10 through a circulating pump for circulation treatment;
6. the effluent of the overflow weir of the third sedimentation tank 11 is discharged to the contact oxidation tank 12, the treated wastewater is sent to the secondary sedimentation tank 13 and then sent out through the clean water tank 14 after reaching the standard, and the flow rate is 35m 3/h. The sludge at the bottom of the secondary sedimentation tank 13 flows back to the contact oxidation tank 12.
TABLE 1 Process Unit treatment efficiency
The sewage treatment experiment is carried out in the TMP production plant by adopting the TMP sewage treatment method, and the COD (chemical oxygen demand) and formaldehyde treatment efficiency of each process unit are shown in the table 1.
The mechanisms, components and parts of the present invention which are not described in detail are all the existing structures which exist in the prior art. Can be purchased directly from the market.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. 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 sewage treatment system for TMP production which characterized in that: comprises a pretreatment unit and a biochemical treatment unit; the pretreatment unit comprises an oil separation tank (1), a formaldehyde adjusting tank (2), a condensation reaction tank (3), a first sedimentation tank (4) and a comprehensive adjusting tank (5) which are sequentially connected; the biochemical treatment unit comprises an air floatation device (6), a second sedimentation tank (7), a hydrolysis acidification tank (8), a buffer tank (9), an IC internal circulation reactor (10), a third sedimentation tank (11), a contact oxidation tank (12), a secondary sedimentation tank (13) and a clean water tank (14) which are sequentially connected; a third lift pump (17) and a plate heat exchanger (22) are arranged between the comprehensive adjusting tank (5) and the air floatation device (6).
2. The wastewater treatment system for TMP production of claim 1, wherein: and the sludge generated by the IC internal circulation reactor (10) is returned and conveyed into the hydrolysis acidification tank (8).
3. The wastewater treatment system for TMP production of claim 2, wherein: and the third sedimentation tank (11) carries out reflux conveying to the IC internal circulation reactor (10) through an anaerobic reflux pump (19).
4. The wastewater treatment system for TMP production of claim 1, wherein: and the secondary sedimentation tank (13) carries out backflow conveying to the contact oxidation tank (12) through a sludge backflow pump (20).
5. The wastewater treatment system for TMP production of claim 1, wherein: and the clean water tank (14) carries out backflow conveying to the comprehensive adjusting tank (5) through a fifth lifting pump (21).
6. The wastewater treatment system for TMP production of claim 1, wherein: anaerobic strain sludge is arranged in the hydrolysis acidification tank (8); and a stirring facility is arranged in the hydrolysis acidification tank (8).
7. The wastewater treatment system for TMP production of claim 1, wherein: the contact oxidation tank (12) comprises a tank body (121); the inside of the tank body (121) is provided with a filler; an aeration device (23) is arranged below the filler; the aeration device (23) comprises an air supply pipeline (231), a first aeration pipe (232) and a second aeration pipe (233); the gas supply pipeline (231) is distributed at the bottom of the tank body (121) in a vein shape; the first aeration pipes (232) are communicated and uniformly distributed at the top of the air supply pipeline (231); the second aeration pipe (233) is communicated with and arranged at two sides of the air supply pipeline (231); the second aeration pipe (233) is attached to the side wall of the tank body (121); the distribution density of the second aeration pipe (233) is gradually increased along the flowing direction of the sewage in the tank body (121).
8. The wastewater treatment system for TMP production of claim 7, wherein: the aeration path of the second aeration pipe (233) is directed to the center of the water flow.
9. The wastewater treatment system for TMP production of claim 8, wherein: the aeration path of the second aeration tube (233) is deflected in an upstream direction.
10. The wastewater treatment system for TMP production of claim 7, wherein: the air supply pipeline (231) comprises a main pipe (201) and a branch pipe (202); the main pipe (201) is arranged at the center of the bottom of the tank body (121) in parallel along a water flow path; the surface of the main pipe (201) is provided with a transfer pipe (203); the adapter tubes (203) are spirally distributed on the surface of the main tube (201); one end of the branch pipe (202) is communicated with the adapter pipe (203), and the other end of the branch pipe supplies air to the first aeration pipe (232) or the second aeration pipe (233).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122009927.XU CN216129472U (en) | 2021-08-24 | 2021-08-24 | A sewage treatment system for TMP production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122009927.XU CN216129472U (en) | 2021-08-24 | 2021-08-24 | A sewage treatment system for TMP production |
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| CN216129472U true CN216129472U (en) | 2022-03-25 |
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| CN202122009927.XU Active CN216129472U (en) | 2021-08-24 | 2021-08-24 | A sewage treatment system for TMP production |
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- 2021-08-24 CN CN202122009927.XU patent/CN216129472U/en active Active
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