CN116947210A - Low-carbon type deep denitrification reactor and method for urban sewage by recycling NMP (N-methyl pyrrolidone) wastewater - Google Patents
Low-carbon type deep denitrification reactor and method for urban sewage by recycling NMP (N-methyl pyrrolidone) wastewater Download PDFInfo
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- CN116947210A CN116947210A CN202311158174.6A CN202311158174A CN116947210A CN 116947210 A CN116947210 A CN 116947210A CN 202311158174 A CN202311158174 A CN 202311158174A CN 116947210 A CN116947210 A CN 116947210A
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- water inlet
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- 239000010865 sewage Substances 0.000 title claims abstract description 121
- 239000002351 wastewater Substances 0.000 title claims abstract description 32
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 21
- 238000004064 recycling Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 14
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 title description 18
- 239000010802 sludge Substances 0.000 claims abstract description 91
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 82
- 238000006243 chemical reaction Methods 0.000 claims abstract description 46
- 238000007599 discharging Methods 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 46
- 238000003756 stirring Methods 0.000 claims description 24
- 229910052757 nitrogen Inorganic materials 0.000 claims description 23
- 230000005540 biological transmission Effects 0.000 claims description 15
- 244000005700 microbiome Species 0.000 claims description 13
- UCTAMTCGWMMARC-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.N.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.N.[NH6+3] UCTAMTCGWMMARC-UHFFFAOYSA-N 0.000 claims description 6
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 229910002651 NO3 Inorganic materials 0.000 claims description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000006396 nitration reaction Methods 0.000 claims description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
-
- 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
- C02F3/2866—Particular arrangements for anaerobic reactors
-
- 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
- C02F2101/38—Organic compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
Abstract
The invention relates to a town sewage low-carbon type deep denitrification reactor for recycling NMP wastewater, which comprises a tank body, wherein a water inlet mechanism, a sludge bed, a three-phase separator and an overflow weir are sequentially arranged in the tank body from bottom to top, a water inlet pipe communicated with a water distributor of the water inlet mechanism is arranged on the side wall of the tank body, a water discharge pipe communicated with the overflow weir is arranged on the outer side of the top of the tank body, and an exhaust pipe is arranged on the top side of the tank body in a communication manner; the conversion plate in the water inlet mechanism rotates under the effect of the air cylinder, when the dirt discharging groove of the conversion plate rotates to be staggered with the supporting block, the sludge in the tank body is conveniently conveyed to the sealed anoxic space below the water inlet mechanism of the tank body, when the dirt discharging groove of the conversion plate rotates to be completely overlapped with the supporting block, the sealing of the water inlet mechanism and the tank body is realized, further, the sealing discharge of the sludge is realized, and the sludge discharge is conveniently completed when the reactor works.
Description
Technical Field
The invention relates to the technical field of NMP wastewater, in particular to a town sewage low-carbon type deep denitrification reactor and method for recycling NMP wastewater.
Background
A large amount of rectification wastewater is generated in the rectification dehydration process of NMP, wherein the total nitrogen content is high and is up to 800-1200ppm, the COD is up to 8000ppm, the treatment is difficult, the NMP wastewater becomes the bottleneck of expanding the NMP production, the NMP wastewater is reprocessed and utilized through microorganisms as an electron donor for denitrification of town sewage, the low-carbon deep denitrification is realized through microorganisms, and meanwhile, the standard emission of the wastewater is realized.
When mixed wastewater of NMP wastewater and town wastewater is subjected to low-carbon denitrification through a microbial technology, waste liquid and sewage are located in a reactor and react through anaerobic microorganisms, because in the reaction process, the reactor is required to be ensured to be in an anaerobic environment, and along with the continuous progress of the reaction, more and more sludge is accumulated in the reactor, the reactor is required to be cleaned in time, the reactor is required to be opened for stopping the reaction in the existing cleaning mode, so that shutdown cleaning is required, and after each reaction is finished, the reactor is required to be vacuumized, so that the whole work is complex.
Disclosure of Invention
The invention solves the problems that when mixed wastewater of NMP wastewater and town wastewater is subjected to low-carbon denitrification by a microbial technology, waste liquid and sewage are reacted in the reactor through anaerobic microorganisms, the reactor is required to be kept in an anaerobic environment in the reaction process, and as the reaction is continuously carried out, more and more sludge accumulated in the reactor is required to be cleaned in time, the reactor is required to be opened in the existing cleaning mode to stop the reaction, so that shutdown cleaning is required, and after each reaction is finished, the reactor is required to be subjected to vacuumizing operation, so that the whole work is complicated.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a town sewage low-carbon type advanced denitrification reactor for recycling NMP wastewater, which comprises a tank body, wherein a water inlet mechanism, a sludge bed, a three-phase separator and an overflow weir are sequentially arranged in the tank body from bottom to top, a water inlet pipe communicated with a water distributor of the water inlet mechanism is arranged on the side wall of the tank body, a drain pipe communicated with the overflow weir is arranged on the outer side of the top of the tank body, and an exhaust pipe is arranged on the top side of the tank body in a communicated manner;
the water inlet mechanism comprises a circular truncated cone-shaped water distributor, a plurality of water inlet holes are formed in the water distributor, a plurality of supporting blocks are arranged on the outer side of the water distributor at equal angles in a fan shape, the supporting blocks are fixedly connected with the inner wall of the tank body, a circular conversion plate is rotatably arranged on the bottom side of the water distributor, and a plurality of sewage draining grooves are formed in the conversion plate at equal angles in the fan shape.
Preferably, the top side of the supporting block is provided with a slope, the coverage area of the bottom side of the supporting block is larger than that of the dirt discharging groove, and the number of the supporting block is the same as that of the dirt discharging groove.
Preferably, the bottom side of the conversion plate is provided with a toothed ring, a cylinder is arranged on the outer side of the tank body, a rack is arranged at the telescopic end of the cylinder, and the rack is meshed with the toothed ring.
Preferably, a circular truncated cone-shaped filter cover is arranged inside the tank body and below the water inlet mechanism, a first rotating shaft is arranged in the filter cover in a penetrating and rotating mode, a plurality of stirring plates are arranged on the first rotating shaft at equal angles, and the stirring plates are close to the outer side wall of the filter cover.
Preferably, a plurality of first blowdown grooves are formed in the outer side of the bottom of the tank body at equal angles, a baffle ring plate is rotatably arranged in the outer side of the bottom of the tank body, and a plurality of first blowdown grooves are formed in the baffle ring plate at equal angles.
Preferably, the number of the first blowdown grooves, the number of the second blowdown grooves and the number of the stirring plates are the same, the lengths of the first blowdown grooves and the first blowdown grooves are the same, the distance between every two adjacent stirring plates is 2 times that of the first blowdown grooves, a supporting part is arranged between every two adjacent first blowdown grooves, a covering part is arranged between every two adjacent second blowdown grooves, and the stirring plates move between two ends of the supporting part.
Preferably, the baffle ring plate is connected with the outer wall of the tank body through a bearing, a sealing strip is arranged between the baffle ring plate and the tank body, and external teeth are arranged on the outer side of the baffle ring plate.
Preferably, the support plate is installed to the external side of jar, install the motor in the backup pad, the motor output is connected with the second pivot, and the second pivot top install with external tooth meshing's commentaries on classics tooth.
Preferably, a transmission case is installed at the bottom side of the tank body, the input end of the transmission case is connected with the second rotating shaft, and the output end of the transmission case is connected with the first rotating shaft.
A low-carbon deep denitrification method for town sewage by using NMP wastewater as a resource comprises the following specific operation steps:
step one: adding mixed sewage of wastewater and town sewage generated in the process of rectifying and dehydrating NMP into an anaerobic tank, decomposing nitrogen-containing organic matters into ammonia nitrogen through microorganisms, oxidizing the ammonia nitrogen into nitrate ammonia nitrogen in an aerobic tank through a nitration reaction, introducing water into a reactor, and removing nitrate ammonia nitrogen into gaseous nitrogen from the water through denitrification reaction of microorganisms under an anoxic condition;
step two: sewage enters a tank body through a water inlet pipe and a water distributor, at the moment, sewage to be treated is mixed and contacted with sludge in a sludge bed, microorganisms in the sludge are subjected to denitrification reaction to reduce nitrate into gaseous nitrogen, the gaseous nitrogen is continuously discharged in the form of tiny bubbles, the tiny bubbles are combined and become large in the rising process, the sludge with thinner sludge concentration is formed at the upper part of the sludge bed due to stirring of the gaseous nitrogen and rises together with water to enter a three-phase separator, when the gaseous nitrogen hits a reflecting plate at the lower part of the three-phase separator, the gaseous nitrogen is deflected to the periphery of the reflecting plate, then passes through a water layer and enters an air chamber to concentrate on the gaseous nitrogen in the air chamber, the gaseous nitrogen is led out through an exhaust pipe, solid-liquid mixture is reflected to enter a precipitation area of the three-phase separator, the sludge in the sewage is flocculated, particles are gradually increased, and are settled under the action of gravity, the sludge precipitated on an inclined wall slides back to the sludge bed along the inclined wall, a large amount of sludge is accumulated in the sludge bed, and treated effluent water after the separation of the sludge overflows from the upper part of the overflow weir;
step three: the method comprises the steps that sludge in a sludge bed needs to be cleaned regularly, racks are driven to move through cylinders at the moment, meshed toothed rings are driven to rotate, a conversion plate rotates at the bottom side of a water distributor at the moment until a sewage discharging groove and a supporting block are arranged in a staggered mode, at the moment, the sludge in a tank body enters the sewage discharging groove along a slope and falls on a filter cover to filter the sludge and the sewage, the filtered sewage is located below the filter cover, the sludge is located on the filter cover, then the conversion plate is rotated to be original state by the operation of the cylinders, the sewage discharging groove is located at the bottom of the supporting block, and the conversion plate is matched with the supporting block to realize sealing of the tank body;
step four: the motor drives the first rotating shaft and the rotating teeth to rotate, the baffle ring plate is driven to rotate through the matching of the meshed external teeth, along with the rotation of the baffle ring plate, the staggered first sewage draining grooves and second sewage draining grooves are gradually overlapped, sludge on the filter cover is discharged from the first sewage draining grooves and the second sewage draining grooves, meanwhile, the first rotating shaft rotates to drive the second rotating shaft to rotate through transmission of the transmission box, the second rotating shaft drives the stirring plate to rotate along the filter cover, the sludge between the supporting portion and the filter cover is pushed to be discharged to the first sewage draining grooves and the second sewage draining grooves, the baffle ring plate is subsequently rotated to an initial position through motor operation, at the moment, the covering portion of the baffle ring plate covers the outer side of the first sewage draining grooves, the first sewage draining grooves are located on the outer side of the supporting portion, and sealing of the bottom of the tank body is achieved through the baffle ring plate.
The beneficial effects of the invention are as follows: the conversion plate in the water inlet mechanism rotates under the action of the air cylinder, when the dirt discharging groove of the conversion plate rotates to be staggered with the supporting block, the sludge in the tank body is conveniently conveyed to a sealed anoxic space below the water inlet mechanism of the tank body, when the dirt discharging groove of the conversion plate rotates to be completely overlapped with the supporting block, the water inlet mechanism and the tank body are sealed, further, the sealed discharge of the sludge is realized, and the sludge discharge is conveniently completed when the reactor works;
the sewage after filtering is positioned below the filter cover, the reflux is carried out through the reflux pipe, the sludge is positioned on the filter cover, the baffle ring plate and the stirring plate are rotated through the motor, when the first sewage draining groove and the second sewage draining groove are gradually overlapped, the sludge positioned on the filter cover is discharged from the first sewage draining groove and the second sewage draining groove, and the sludge is discharged through the plurality of sewage draining grooves, so that the discharge efficiency is greatly improved, and when the first sewage draining groove and the second sewage draining groove are staggered, the bottom of the tank body is sealed through the baffle ring plate; and the sludge between the supporting part and the filter cover is pushed to the first sewage draining groove and the second sewage draining groove to be discharged through the rotary stirring plate, so that the automatic separation and discharge of the sludge and the sewage are realized, the step-by-step conveying of the sludge is realized, and the air is prevented from entering the reaction area of the tank body.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is an overall cross-sectional view of the present invention;
FIG. 3 is a schematic view of the water inlet mechanism and filter housing mounting structure of the present invention;
FIG. 4 is a schematic view of the water inlet mechanism of the present invention;
FIG. 5 is a schematic view of the filter housing mounting structure of the present invention;
fig. 6 is a top view of the filter housing of the present invention.
Legend description:
1. a tank body; 2. a water inlet mechanism; 3. a sludge bed; 4. a three-phase separator; 5. an overflow weir; 6. a water inlet pipe; 7. a drain pipe; 8. an exhaust pipe; 9. a water distributor; 10. a water inlet hole; 11. a support block; 12. a ramp; 13. a conversion plate; 14. a dirt discharging groove; 15. a cylinder; 16. a rack; 17. a toothed ring; 18. a filter cover; 19. a return pipe; 20. a first rotating shaft; 21. a kick-out plate; 22. a first sewage drain tank; 23. a retaining ring plate; 24. a second sewage drain tank; 25. a support plate; 26. a motor; 27. a second rotating shaft; 28. a transmission case; 29. rotating teeth; 30. external teeth.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Specific examples are given below.
Referring to fig. 1-6, a low-carbon type deep denitrification reactor for urban sewage for recycling NMP wastewater comprises a tank body 1, wherein a water inlet mechanism 2, a sludge bed 3, a three-phase separator 4 and an overflow weir 5 are sequentially arranged in the tank body 1 from bottom to top, a water inlet pipe 6 communicated with a water distributor 9 of the water inlet mechanism 2 is arranged on the side wall of the tank body 1, a water outlet pipe 7 communicated with the overflow weir 5 is arranged on the outer side of the top of the tank body 1, and an exhaust pipe 8 is arranged on the top side of the tank body 1 in a communicated manner;
the water inlet mechanism 2 comprises a circular truncated cone-shaped water distributor 9, a plurality of water inlet holes 10 are formed in the water distributor 9, a plurality of supporting blocks 11 are arranged on the outer side of the water distributor 9 at equal angles in a fan shape, the supporting blocks 11 are fixedly connected with the inner wall of the tank body 1, a circular conversion plate 13 is rotatably arranged on the bottom side of the water distributor 9, a plurality of dirt discharging grooves 14 are formed in the conversion plate 13 at equal angles in a fan shape, the top side of the supporting blocks 11 is provided with slopes 12, sludge can fall off automatically along the slopes 12 conveniently, the phenomenon that the sludge is accumulated on the supporting blocks 11 and cannot be discharged is avoided, the coverage area of the bottom side of the supporting blocks 11 is larger than that of the dirt discharging grooves 14, the numbers of the supporting blocks 11 and the dirt discharging grooves 14 are the same, a toothed ring 17 is arranged on the bottom side of the conversion plate 13, an air cylinder 15 is arranged on the outer side of the tank body 1, a toothed rack 16 is arranged at the telescopic end of the air cylinder 15, the toothed rack 16 is meshed with the toothed ring 17, the toothed rack 16 is driven to move through the air cylinder 15, the toothed ring 17 is rotated, at the moment, the conversion plate 13 rotates at the bottom side of the water distributor 9, when the dirt discharging grooves 14 of the conversion plate 13 are rotated to be staggered with the supporting blocks 11, the dirt discharging grooves 14, the dirt discharging grooves 11 are convenient to be stacked with the supporting blocks 1, and the dirt discharging grooves 1 in the tank body 1, the water can completely and the sealing mechanism 1 and the water inlet mechanism 2 is completely and sealed with the water inlet mechanism 1.
A truncated cone-shaped filter cover 18 is arranged inside the tank body 1 and below the water inlet mechanism 2, a first rotating shaft 20 is rotatably arranged in the filter cover 18 in a penetrating manner, a plurality of material stirring plates 21 are arranged on the first rotating shaft 20 at equal angles, the material stirring plates 21 are close to the outer side wall of the filter cover 18, a plurality of first sewage draining grooves 22 are formed in the outer side of the bottom of the tank body 1 at equal angles, a baffle ring plate 23 is rotatably arranged on the outer side of the bottom of the tank body 1, a plurality of first sewage draining grooves 22 are formed in the baffle ring plate 23 at equal angles, the numbers of the first sewage draining grooves 22, the second sewage draining grooves 24 and the material stirring plates 21 are the same, the lengths of the first sewage draining grooves 22 and the first sewage draining grooves 22 are the same, the distance between adjacent material stirring plates 21 is 2 times the length of the first sewage draining grooves 22, a supporting part is arranged between the adjacent first sewage draining grooves 22, a covering part is arranged between the adjacent second sewage draining grooves 24, the material stirring plates 21 move between two ends of the supporting part, the full coverage of the first sewage draining groove 22 is conveniently realized through the coverage part, the stirring plate 21 moves between the two ends of the supporting part, the sludge between the supporting part and the filter cover 18 is conveniently pushed to the first sewage draining groove 22, the baffle ring plate 23 is connected with the outer wall of the tank body 1 through a bearing, a sealing strip is arranged between the baffle ring plate 23 and the tank body 1, the outer side of the baffle ring plate 23 is provided with external teeth 30, the sealing connection of the baffle ring plate 23 and the tank body 1 is conveniently realized, the outer side of the tank body 1 is provided with a supporting plate 25 and an air pump, the space of the tank body 1 below the water inlet mechanism 2 is vacuumized and deoxidized through the air pump, the supporting plate 25 is provided with a motor 26, the output end of the motor 26 is connected with a second rotating shaft 27, the top end of the second rotating shaft 27 is provided with rotating teeth 29 meshed with the external teeth 30, the motor 26 drives the first rotating shaft 20 and the rotating teeth 29 to rotate in cooperation with the meshed external teeth 30, the baffle ring plate 23 is driven to rotate, the bottom side of the tank body 1 is provided with a transmission box 28, the input end of the transmission box 28 is connected with the second rotating shaft 27, the output end of the transmission box 28 is connected with the first rotating shaft 20, the first rotating shaft 20 rotates to drive the second rotating shaft 27 to rotate through the transmission box 28, the second rotating shaft 27 drives the material stirring plate 21 to rotate along the filter cover 18, when the first sewage draining groove 22 and the second sewage draining groove 24 are gradually overlapped, sludge on the filter cover 18 is discharged from the first sewage draining groove 22 and the second sewage draining groove 24, and when the first sewage draining groove 22 and the second sewage draining groove 24 are staggered, sealing of the bottom of the tank body 1 is realized through the baffle ring plate 23.
The method for deeply denitrifying the town sewage in low carbon type by recycling the NMP wastewater comprises the following specific operation steps:
step one: adding mixed sewage of wastewater and town sewage generated in the process of rectifying and dehydrating NMP into an anaerobic tank, decomposing nitrogen-containing organic matters into ammonia nitrogen through microorganisms, oxidizing the ammonia nitrogen into nitrate ammonia nitrogen in an aerobic tank through a nitration reaction, introducing water into a reactor, and removing nitrate ammonia nitrogen into gaseous nitrogen from the water through denitrification reaction of microorganisms under an anoxic condition;
step two: sewage enters the tank body 1 through the water inlet pipe 6 and the water distributor 9, at the moment, sewage to be treated is mixed and contacted with sludge in the sludge bed 3, microorganisms in the sludge are subjected to denitrification reaction to reduce nitrate into gaseous nitrogen, the gaseous nitrogen is continuously discharged in the form of tiny bubbles, the tiny bubbles are combined and become large in the rising process, the sludge with thinner sludge concentration is formed at the upper part of the sludge bed 3 due to stirring of the gaseous nitrogen and rises into the three-phase separator 4 together with water, the gaseous nitrogen is folded to the periphery of the reflecting plate when hitting a reflecting plate at the lower part of the three-phase separator 4, then enters the air chamber through a water layer to concentrate on the gaseous nitrogen in the air chamber, is guided out by the exhaust pipe 8, the solid-liquid mixture is reflected into a sedimentation area of the three-phase separator 4, the sludge in the sewage is flocculated, particles are gradually increased, and settled under the action of gravity, the sludge precipitated on the inclined wall slides back to the sludge bed 3 along the inclined wall, a large amount of sludge is accumulated in the sludge bed 3, and treated water after the sludge is separated from the upper part of the overflow weir 5;
step three: the sludge in the sludge bed 3 needs to be cleaned regularly, at the moment, the racks 16 are driven to move through the air cylinders 15 to drive the meshed toothed rings 17 to rotate, at the moment, the conversion plate 13 rotates at the bottom side of the water distributor 9 until the sewage discharging grooves 14 and the supporting blocks 11 are arranged in a staggered mode, at the moment, the sludge in the tank body 1 enters the sewage discharging grooves 14 along the slopes 12 and falls on the filter covers 18 to filter the sludge and the sewage, the filtered sewage is positioned below the filter covers 18, the sludge is positioned on the filter covers 18, then the air cylinders 15 work to rotate the conversion plate 13 to be original, the sewage discharging grooves 14 are positioned at the bottom of the supporting blocks 11, and the conversion plate 13 is matched with the supporting blocks 11 to realize the sealing of the tank body 1;
step four: the motor 26 drives the first rotating shaft 20 and the rotating teeth 29 to rotate, the engaged external teeth 30 are matched, the baffle ring plate 23 is driven to rotate, along with the rotation of the baffle ring plate 23, the staggered first sewage draining grooves 22 and second sewage draining grooves 24 are gradually overlapped, sludge on the filter cover 18 is discharged from the first sewage draining grooves 22 and the second sewage draining grooves 24, meanwhile, the first rotating shaft 20 rotates to drive the second rotating shaft 27 to rotate through the transmission box 28, the second rotating shaft 27 drives the stirring plate 21 to rotate along the filter cover 18, the sludge between the supporting part and the filter cover 18 is pushed to the first sewage draining grooves 22 and the second sewage draining grooves 24 to be discharged, the baffle ring plate 23 is subsequently rotated to an initial position through the operation of the motor 26, at the moment, the covering part of the baffle ring plate 23 covers the outer side of the first sewage draining grooves 22, the first sewage draining grooves 22 are positioned on the outer side of the supporting part, and the bottom of the tank body 1 is sealed through the baffle ring plate 23.
The conversion plate 13 in the water inlet mechanism 2 rotates under the action of the air cylinder 15, when the dirt discharging groove 14 of the conversion plate 13 rotates to be staggered with the supporting block 11, the sludge in the tank body 1 is conveniently conveyed to a sealed anoxic space below the water inlet mechanism 2 of the tank body 1, when the dirt discharging groove 14 of the conversion plate 13 rotates to be completely overlapped with the supporting block 11, the sealing of the water inlet mechanism 2 and the tank body 1 is realized, further, the sealing discharge of the sludge is realized, and the sludge discharge is conveniently completed when the reactor works;
the filtering of the sludge and the sewage is carried out on the filter cover 18, the filtered sewage is positioned below the filter cover 18 and flows back through the backflow pipe 19, the sludge is positioned on the filter cover 18, the rotation of the baffle ring plate 23 and the stirring plate 21 is realized through the motor 26, when the first sewage draining groove 22 and the second sewage draining groove 24 are gradually overlapped, the sludge positioned on the filter cover 18 is discharged from the first sewage draining groove 22 and the second sewage draining groove 24, and when the first sewage draining groove 22 and the second sewage draining groove 24 are staggered, the sealing of the bottom of the tank body 1 is realized through the baffle ring plate 23; and the rotary stirring plate 21 pushes the sludge between the supporting part and the filter mantle 18 to the first sewage draining groove 22 and the second sewage draining groove 24 for discharging, so that the automatic separation and discharge of the sludge and the sewage are realized, the progressive conveying of the sludge is realized, and the air is prevented from entering the reaction area of the tank body 1.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
1. The utility model provides a town sewage low-carbon type advanced denitrification reactor for NMP wastewater reclamation, which is characterized by comprising a tank body (1), wherein a water inlet mechanism (2), a sludge bed (3), a three-phase separator (4) and an overflow weir (5) are sequentially arranged in the tank body (1) from bottom to top, a water inlet pipe (6) communicated with a water distributor (9) of the water inlet mechanism (2) is arranged on the side wall of the tank body (1), a drain pipe (7) communicated with the overflow weir (5) is arranged on the outer side of the top of the tank body (1), and an exhaust pipe (8) is arranged on the top side of the tank body (1) in a communication manner;
the water inlet mechanism (2) comprises a circular truncated cone-shaped water distributor (9), a plurality of water inlet holes (10) are formed in the water distributor (9), a plurality of supporting blocks (11) are arranged on the outer side of the water distributor (9) in a fan-shaped equiangular manner, the supporting blocks (11) are fixedly connected with the inner wall of the tank body (1), a circular conversion plate (13) is rotatably arranged on the bottom side of the water distributor (9), and a plurality of dirt discharging grooves (14) are formed in the conversion plate (13) in a fan-shaped equiangular manner.
2. The low-carbon deep denitrification reactor for urban sewage by utilizing NMP wastewater as a resource according to claim 1, wherein the top side of the supporting block (11) is provided with a slope (12), the coverage area of the bottom side of the supporting block (11) is larger than that of the sewage draining groove (14), and the number of the supporting block (11) and the sewage draining groove (14) are the same.
3. The town sewage low-carbon type deep denitrification reactor for recycling NMP wastewater according to claim 2, wherein a toothed ring (17) is arranged at the bottom side of the conversion plate (13), a cylinder (15) is arranged at the outer side of the tank body (1), a rack (16) is arranged at the telescopic end of the cylinder (15), and the rack (16) is meshed with the toothed ring (17).
4. A town sewage low-carbon type deep denitrification reactor for recycling NMP wastewater according to claim 3, wherein a truncated cone-shaped filter cover (18) is arranged inside the tank body (1) and below the water inlet mechanism (2), a first rotating shaft (20) is rotatably arranged in the filter cover (18) in a penetrating manner, a plurality of stirring plates (21) are arranged on the first rotating shaft (20) at equal angles, and the stirring plates (21) are close to the outer side wall of the filter cover (18).
5. The low-carbon deep denitrification reactor for urban sewage recycling by NMP wastewater according to claim 4, wherein a plurality of first sewage draining grooves (22) are formed in the outer side of the bottom of the tank body (1) at equal angles, a baffle ring plate (23) is rotatably arranged in the outer side of the bottom of the tank body (1), and a plurality of first sewage draining grooves (22) are formed in the upper side of the baffle ring plate (23) at equal angles.
6. The low-carbon deep denitrification reactor for urban sewage recycling of NMP wastewater according to claim 5, wherein the number of the first blowdown tank (22), the second blowdown tank (24) and the shifting plate (21) is the same, the lengths of the first blowdown tank (22) and the first blowdown tank (22) are the same, the distance between adjacent shifting plates (21) is 2 times the length of the first blowdown tank (22), a supporting part is arranged between adjacent first blowdown tanks (22), a covering part is arranged between adjacent second blowdown tanks (24), and the shifting plate (21) moves between two ends of the supporting part.
7. The low-carbon type deep denitrification reactor for urban sewage by utilizing NMP wastewater as a resource according to claim 6, wherein the baffle ring plate (23) is connected with the outer wall of the tank body (1) through a bearing, a sealing strip is arranged between the baffle ring plate (23) and the tank body (1), and external teeth (30) are arranged on the outer side of the baffle ring plate (23).
8. The town sewage low-carbon type deep denitrification reactor for recycling NMP wastewater according to claim 7, wherein a supporting plate (25) is arranged on the outer side of the tank body (1), a motor (26) is arranged on the supporting plate (25), the output end of the motor (26) is connected with a second rotating shaft (27), and rotating teeth (29) meshed with external teeth (30) are arranged on the top end of the second rotating shaft (27).
9. The town sewage low-carbon type deep denitrification reactor for recycling NMP wastewater according to claim 8, wherein a transmission case (28) is installed at the bottom side of the tank body (1), the input end of the transmission case (28) is connected with the second rotating shaft (27), and the output end of the transmission case (28) is connected with the first rotating shaft (20).
10. A low-carbon deep denitrification method for town sewage by using NMP wastewater as a resource is characterized by comprising the following specific operation steps:
step one: adding mixed sewage of wastewater generated in the process of rectifying and dehydrating NMP and town sewage into an anaerobic tank, decomposing nitrogen-containing organic matters into ammonia nitrogen through microorganisms, oxidizing the ammonia nitrogen into nitrate ammonia nitrogen in an aerobic tank through nitration, introducing water into the reactor of claims 1-9, and removing nitrate ammonia nitrogen into gaseous nitrogen from the water through denitrification reaction of microorganisms under anoxic conditions;
step two: sewage enters the tank body (1) through the water inlet pipe (6) and the water distributor (9), at the moment, sewage to be treated is mixed and contacted with the sludge of the sludge bed (3), microorganisms in the sludge are subjected to denitrification reaction to reduce nitrate into gaseous nitrogen, the gaseous nitrogen is continuously discharged in the form of tiny bubbles, the tiny bubbles are combined and become large in the rising process, the upper part of the sludge bed (3) forms a sludge with thinner sludge concentration and water together with the stirring of the gaseous nitrogen, the sludge rises into the three-phase separator (4), when the gaseous nitrogen hits the reflecting plate at the lower part of the three-phase separator (4), the gaseous nitrogen is folded around the reflecting plate, then passes through the water layer and enters the air chamber to be concentrated into the gaseous nitrogen of the air chamber, the gaseous nitrogen is led out through the air exhaust pipe (8), the solid-liquid mixture is reflected into the sedimentation area of the three-phase separator (4), the sludge in the sewage is flocculated, the particles are gradually increased, the sludge precipitated on the inclined wall slides back to the sludge bed (3) along the inclined wall under the action of gravity, a large amount of sludge accumulated in the sludge bed (3), and the accumulated sludge overflows from the overflow part (5) after the sludge is separated;
step three: the sludge in the sludge bed (3) needs to be cleaned regularly, at the moment, a rack (16) is driven to move through a cylinder (15) to drive a meshed toothed ring (17) to rotate, at the moment, a conversion plate (13) rotates at the bottom side of a water distributor (9) until a sewage discharging groove (14) and a supporting block (11) are arranged in a staggered mode, at the moment, the sludge in a tank body (1) enters the sewage discharging groove (14) along a slope (12), falls on a filter cover (18) to filter the sludge and the sewage, the filtered sewage is positioned below the filter cover (18), the sludge is positioned on the filter cover (18), then the cylinder (15) works to rotate the conversion plate (13) to be original, the sewage discharging groove (14) is positioned at the bottom of the supporting block (11), and the conversion plate (13) is matched with the supporting block (11) to realize the sealing of the tank body (1);
step four: the motor (26) drives the first rotating shaft (20) and the rotating teeth (29) to rotate, the gear ring plate (23) is driven to rotate in cooperation with the meshed external teeth (30), the staggered first sewage draining grooves (22) and the staggered second sewage draining grooves (24) are gradually overlapped along with the rotation of the gear ring plate (23), sludge on the filter cover (18) is discharged from the first sewage draining grooves (22) and the second sewage draining grooves (24), meanwhile, the first rotating shaft (20) rotates to drive the second rotating shaft (27) to rotate through the transmission box (28), the second rotating shaft (27) drives the stirring plate (21) to rotate along the filter cover (18), the sludge between the supporting portion and the filter cover (18) is pushed to be discharged to the first sewage draining grooves (22) and the second sewage draining grooves (24), the gear ring plate (23) is subsequently rotated to the initial position through the motor (26), the covering portion of the gear ring plate (23) covers the outer side of the first sewage draining grooves (22), and the first sewage draining grooves (22) are located on the outer side of the supporting portion, and the bottom of the tank (1) is sealed through the gear ring plate (23).
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|---|---|---|---|
| CN202311158174.6A CN116947210A (en) | 2023-09-08 | 2023-09-08 | Low-carbon type deep denitrification reactor and method for urban sewage by recycling NMP (N-methyl pyrrolidone) wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117566915A (en) * | 2024-01-19 | 2024-02-20 | 河南师范大学 | Sewage treatment equipment with nitration reaction and treatment method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117566915A (en) * | 2024-01-19 | 2024-02-20 | 河南师范大学 | Sewage treatment equipment with nitration reaction and treatment method thereof |
| CN117566915B (en) * | 2024-01-19 | 2024-03-22 | 河南师范大学 | Sewage treatment equipment with nitration reaction and treatment method thereof |
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