CN217148906U

CN217148906U - Sewage treatment combined system

Info

Publication number: CN217148906U
Application number: CN202220685192.4U
Authority: CN
Inventors: 沈虎祥; 盛建兵; 刘燕林; 鲍松平
Original assignee: China National Air Separation Engineering Co ltd
Current assignee: China National Air Separation Engineering Co ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-08-09
Anticipated expiration: 2032-03-28

Abstract

The utility model provides a sewage treatment combined system, it can stably reach earth's surface standard IV class standard and Zhejiang province clean production emission standard to go out water quality of water. The sewage outlet of the rotational flow grit chamber is connected with the sewage inlet of the membrane grid tank; the sewage outlet of the membrane grid tank is connected with the sewage inlet of the regulating tank; a sewage outlet of the regulating tank is connected with a sewage inlet of the ecological chain reaction tank; a sewage outlet of the ecological chain reaction tank is connected with a sewage inlet of the middle water collecting tank; the sewage outlet of the middle water collecting tank is connected with the sewage inlet of the active carbon adsorption and high-efficiency sedimentation combined tank; the supernatant outlet of the active carbon adsorption and high-efficiency sedimentation combined tank is connected with the inlet of the denitrification deep bed filter; the water outlet of the denitrification deep bed filter is connected with the water inlet of the denitrification filter clean water tank; the water outlet of the denitrification filter pool clean water tank is connected with the water inlet of the chemical disinfection tank.

Description

Sewage treatment combined system

Technical Field

The utility model relates to a sewage treatment combined system is mainly applied to the sewage treatment trade.

Background

Sewage treatment is a process of purifying sewage to meet the water quality requirement of discharging the sewage into a certain water body or reusing the sewage. Sewage treatment is widely applied to various fields such as buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like, and is increasingly used in daily life of common people.

Effluent treated by most of the existing sewage treatment plants hardly reaches the surface level IV standard, and for sewage with a large proportion of industrial wastewater, the conventional activated sludge process generally has the problem that COD can not stably reach the clean production discharge standard of Zhejiang province, namely COD required by discharge standard of main water pollutants of sewage treatment plants of Zhejiang province (DB 33/2169 + 2018) is less than 30 mg/L.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the above-mentioned not enough that exists among the prior art, and provide a sewage treatment combined system that structural design is reasonable, go out water quality of water and can stably reach IV class standards of earth's surface standard and Zhejiang province clean production emission standard, wherein TN <10 mg/L.

The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides a sewage treatment integrated system which characterized in that: comprises a rotational flow grit chamber, a membrane grid tank, an adjusting tank, an ecological chain reaction tank, an intermediate water collecting tank, an active carbon adsorption and high-efficiency sedimentation combined tank, a denitrification deep bed filter tank, a denitrification filter tank clean water tank and a chemical disinfection tank; the sewage outlet of the rotational flow grit chamber is connected with the sewage inlet of the membrane grid tank; the sewage outlet of the membrane grid tank is connected with the sewage inlet of the regulating tank; a sewage outlet of the regulating tank is connected with a sewage inlet of the ecological chain reaction tank; a sewage outlet of the ecological chain reaction tank is connected with a sewage inlet of the middle water collecting tank; the sewage outlet of the middle water collecting tank is connected with the sewage inlet of the active carbon adsorption and high-efficiency sedimentation combined tank; the supernatant outlet of the active carbon adsorption and high-efficiency sedimentation combined tank is connected with the inlet of the denitrification deep bed filter; the water outlet of the denitrification deep bed filter is connected with the water inlet of the denitrification filter clean water tank; the water outlet of the denitrification filter pool clean water tank is connected with the water inlet of the chemical disinfection tank. The cyclone grit chamber in install fine grid and cyclone sand removing machine.

The utility model discloses still include the back flush wastewater disposal basin, the back flush wastewater outlet and the back flush wastewater disposal basin of denitrification deep bed filtering pond are connected.

The equalizing basin in install dive mixer and sewage elevator pump.

The utility model discloses the sewage export of equalizing basin and the sewage import of ecological chain reaction tank between be provided with water yield automatically regulated control system.

Activated carbon adsorption and high-efficient combination pond include activated carbon adsorption pond, coagulation reaction pond and sedimentation tank, activated carbon adsorption pond, coagulation reaction pond, sedimentation tank connect gradually, the sewage outlet of activated carbon adsorption pond and middle catch basin, the access connection in sedimentation tank and the deep bed filtering pond of denitrification.

The activated carbon adsorption tank of the utility model is internally provided with a submersible stirrer; the coagulation reaction tank is internally divided into a coagulation reaction area and a flocculation reaction area, a mixing stirrer is arranged in the coagulation reaction area, and a flocculation stirrer is arranged in the flocculation reaction area.

The utility model discloses still include mud backwash pump and sludge discharge pump, the bottom of the pool of sedimentation tank pass through mud backwash pump and be connected with flocculation reaction zone, the bottom of the pool of sedimentation tank still is connected with sludge discharge pump.

The denitrification deep bed filter tank is internally provided with a quartz sand filter material layer.

The denitrification filter tank clean water basin in be provided with the immersible pump, the immersible pump is connected with the back flush water inlet in denitrification deep bed filtering pond.

Compared with the prior art, the utility model, have following advantage and effect:

1. the effluent quality can reach the emission standard of clean production in Zhejiang province, namely the emission standard of main water pollutants of sewage treatment plants in Zhejiang province (DB 33/2169) -2018), wherein COD is less than 30mg/L, NH3-N is less than 1.5 (3) mg/L, TN is less than 10 (12) mg/L, and TP is less than 0.3mg/L, and the standard except TN has other main indexes reaching the IV-class quality of surface water.

2. The COD can reach the standard stably, and is suitable for the advanced treatment of COD of a high-proportion industrial wastewater and sewage treatment plant.

3. Can be combined with ecological landscape to construct an ecological sewage treatment plant.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

The embodiment of the utility model provides an including whirl grit chamber 1, membrane grid pond 2, equalizing basin 3, ecological chain reaction tank 4, middle catch basin 5, active carbon adsorption and high-efficient precipitation combined tank 6, denitrification deep bed filtering pond 7, denitrification filtering pond clean water basin 8, back flush wastewater disposal basin 9 and chemical disinfection pond 10.

The cyclone grit chamber 1 is internally provided with a fine grid 11 and a cyclone sand remover 12.

The sewage outlet of the rotational flow grit chamber 1 is connected with the sewage inlet of the membrane grid chamber 2. Install membrane grid 21 in the membrane grid pond 2, membrane grid 21 adopts superfine membrane grid, and grid clearance 1mm carries out comparatively thorough getting rid of to the suspended solid of intaking >1mm, reduces the production of follow-up biochemical mud.

The sewage outlet of the membrane grating tank 2 is connected with the sewage inlet of the adjusting tank 3. The adjusting tank 3 is provided with a submersible mixer 31 and a sewage lift pump 32. A water distribution well 33 is arranged at the sewage outlet of the adjusting tank 3. The adjusting tank 3 adjusts the quality and quantity of the sewage, and the adjusting time is determined according to the change condition of the water quality and the water quantity.

The sewage outlet of the adjusting tank 3 is connected with the sewage inlet of the ecological chain reaction tank 4. Be provided with water yield automatically regulated control system 11 between the sewage export of equalizing basin 3 and the sewage import of ecological chain reaction tank 4, be provided with electrical control valve, electromagnetic flow meter and PLC among the water yield automatically regulated control system, realize that biochemical system multiple spot is intake, and each point inflow can be adjusted.

The ecological chain reaction tank 4 mainly removes organic matters, ammonia nitrogen and TN through an ecological reaction chain process, the COD of the treated effluent is less than 30mg/L, the ammonia nitrogen is less than 1.5 (3) mg/L, and the TN is less than 12 mg/L. The interior of the ecological chain reaction tank 4 is divided into six areas, each area is divided into an upper part and a lower part, the upper part is provided with a floating combined filler frame and an aeration system, the lower part is a water distribution area and a sludge discharge area, a first-level A/O is formed from the upper part to the lower part, and the six areas are connected in series to form a 6-level A/O. And the tail end effluent is refluxed by an axial flow pump, and the reflux ratio is 200%. Each zone of the ecological chain reaction tank 4 is provided with an online dissolved oxygen meter and an ORP meter, and is interlocked with a fan for automatic control, so that the dissolved oxygen of each zone is accurately controlled, and the biological denitrification effect in the ecological chain reaction tank 4 is optimal. The artificial floating island is arranged on the water surface of the ecological chain reaction tank 4, the artificial floating island accounts for 25% of the total water area, aquatic plants such as reed, canna indica and macropolybia are planted on the floating island, substances such as N, P in water are absorbed, aerosol generated by aeration can be adsorbed, and odor is reduced. The technical core of the ecological reaction chain process is a multi-layer multi-stage biofilm process A/O process, and simultaneously integrates partial functions of an ultra-deep anaerobic pond, a BC method and a deep treatment pond, and pollutant removal (removal of SS, COD, TN, TP and the like) and sludge treatment (sludge reduction and stabilization) are completed in a pond with the water depth of more than 6 m. The ecological reaction chain process is an artificial ecological treatment system consisting of organisms (such as bacteria, algae, protozoa, metazoan, aquatic plants, high-grade aquatic animals) and non-organisms (such as light, wind, temperature, organic load, pH value, dissolved oxygen, N and P nutrient elements and the like). The biological component in the system is composed of a plurality of food chains, various organisms in the combined pond are interdependent, and a plurality of food chains form a complex ecosystem in which various organisms in the reaction pond are interdependent and mutually restricted. In a limited space, through a water ecosystem established by artificial assistance, the following effects are achieved: firstly, stable high-quality effluent quality is obtained under the conditions of low energy consumption and low carbon operation; secondly, the yield of the organic sludge is low; the heat energy generated in the sludge digestion process is fully utilized, and the peculiar smell generated in the biochemical (anaerobic and aerobic) treatment and sludge disposal processes is eliminated; good ecological landscape, and harmonious interaction between human and nature is realized.

The sewage outlet of the ecological chain reaction tank 4 is connected with the sewage inlet of the middle water collecting tank 5. The middle water collecting tank 5 is internally provided with 3 sewage lifting pumps 51, 2 uses 1 device to lift sewage to the active carbon adsorption and high-efficiency sedimentation combined tank 6.

The sewage outlet of the middle water collecting tank 5 is connected with the sewage inlet of the active carbon adsorption and high-efficiency sedimentation combined tank 6, and the active carbon adsorption and high-efficiency sedimentation combined tank 6 mainly removes TP through physical and chemical sedimentation. The active carbon adsorption and high-efficiency precipitation combined tank 6 comprises an active carbon adsorption tank 61, a coagulation reaction tank 62, a precipitation tank 63 and a pump room, wherein the active carbon adsorption tank 61, the coagulation reaction tank 62 and the precipitation tank 63 are sequentially connected, and the active carbon adsorption tank 61 and the sewage outlet of the middle water collecting tank 5 are arranged. The submersible stirrer 64 is arranged in the activated carbon adsorption tank 61, the activated carbon adsorption tank 61 is used for adsorbing and reacting for 30 minutes, and when the proportion of industrial wastewater is abnormally high, which causes that the COD of the effluent of the biochemical tank is more than 30mg/L or the chroma exceeds the standard, powdered activated carbon is added in the reaction tank to adsorb organic matters which are difficult to degrade in water, so that the COD of the effluent is ensured to be less than 30 mg/L. The coagulation reaction tank 62 is divided into 2 grids, namely a coagulation reaction zone and a flocculation reaction zone, a mixing stirrer 65 is arranged in the coagulation reaction zone, and polyaluminium chloride is added; a flocculation stirrer 66 is arranged in the flocculation reaction zone, and polyacrylamide is added; through the chemical reaction of the polyaluminium chloride and phosphorus, aluminum phosphate floc is formed. An inclined tube filler is arranged on the upper layer in the sedimentation tank 63, a central transmission mud scraper is arranged on the lower layer, the bottom of the sedimentation tank 63 is connected with the flocculation reaction zone through a sludge reflux pump 67, and the bottom of the sedimentation tank 63 is also connected with a sludge discharge pump 68; the aluminum phosphate flocs are precipitated to the bottom of the tank in the inclined pipe area, part of sludge is refluxed to the flocculation reaction area through a sludge reflux pump 67, and part of sludge is discharged outside through a sludge discharge pump 68.

The supernatant outlet of the sedimentation tank 63 of the active carbon adsorption and high-efficiency sedimentation combined tank 6 is connected with the inlet of the denitrification deep-bed filter tank 7, and TN and TP are deeply removed mainly in the denitrification deep-bed filter tank 7. A quartz sand filter material layer 71 is arranged in the denitrification deep bed filter 7, the depth of the quartz sand filter material layer 71 is 1.8m, the particle size is 2-4mm, and the filtering speed is 6 m/h; the bottom of the denitrification deep bed filter 7 is provided with filter bricks for water distribution and gas distribution. 4 grids are divided in the denitrification deep bed filter 7, each grid is periodically and alternately back-washed, the back-washing adopts first water flushing, then air flushing and finally air-water combined back-washing, and the back-washing adopts a program for automatic control. The water inlet and outlet of the denitrification deep bed filter 7 are provided with an online nitrate nitrogen detector, and the supplement amount of the carbon source is automatically adjusted. The denitrification deep bed filter 7 removes TN in water through microorganisms attached to the surface of a filter material, and simultaneously removes TP through the filtration action of quartz sand, wherein TN of the effluent is less than 8mg/L, and TP is less than 0.3 mg/L.

The outlet of the denitrification deep bed filter 7 is connected with the inlet of a denitrification filter clean water tank 8; 2 submersible pumps 81 are arranged in the denitrification filter tank clean water tank 8, the submersible pumps 81 are connected with a backwashing water inlet of the denitrification deep bed filter tank 7, and the submersible pumps 81 send water in the denitrification filter tank clean water tank 8 to the denitrification deep bed filter tank 7 to be used as backwashing water of the denitrification deep bed filter tank 7. A back-flushing wastewater outlet of the denitrification deep-bed filter 7 is connected with a back-flushing wastewater pool 9, and a submersible stirrer 91 is arranged in the back-flushing wastewater pool 9. The back flushing air of the denitrification filter 7 is provided by 2 Roots blowers, and 1 is provided by 1.

The outlet of the denitrification filter tank clean water tank 8 is connected with the inlet of the chemical disinfection tank 10. The chemical disinfection tank 10 is in contact with the reaction for 30 minutes and disinfected by sodium hypochlorite.

The sewage enters the factory and firstly enters the rotational flow grit chamber 1, impurities with the particle size of more than 3mm are removed through the fine grating 11, and then sand grains with the density of 2.65 and the particle size of 0.2mm are removed through the rotational flow sand remover 12.

Sewage automatically flows into the membrane grating tank 2 from the rotational flow grit chamber 1, and fine fibers with the particle size of more than 1mm are removed through the membrane grating 21.

Sewage automatically flows into the adjusting tank 3 from the membrane grid tank 2, the adjusting tank 31 is mixed by a submersible mixer 31, the sewage lifting pump 32 is lifted to the water distribution well 33, and the water distribution well 33 automatically flows into the ecological chain reaction tank 4 after being distributed with water according to the ratio of 3:2:2:2:1 (adjustable) by the automatic water quantity adjusting control system.

The sewage flows from the ecological chain reaction tank 4 to the intermediate collecting tank 5.

The sewage in the middle water collecting tank 5 enters an active carbon adsorption and high-efficiency sedimentation combined tank 6.

Supernatant in the activated carbon adsorption and high-efficiency precipitation combined tank 6 automatically flows to the denitrification deep bed filter 7, a carbon source is supplemented at a water inlet end, and TN in water is removed through denitrifying bacteria in a filler layer.

The effluent of the denitrification deep bed filter 7 automatically flows to a denitrification filter clean water tank 8, and the backwashing wastewater is discharged into a backwashing wastewater tank 9. The clear water in the clear water tank 8 of the denitrification filter tank automatically flows to the chemical disinfection tank 10.

Sodium hypochlorite is added into the water inlet end of the chemical disinfection tank 10, the reaction contact time is 30min, and the disinfected wastewater is discharged to a river.

In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the foundation the utility model discloses an all include in the protection scope of the utility model discloses an equivalent change or simple change that structure, characteristic and principle do.

Claims

1. The utility model provides a sewage treatment integrated system which characterized in that: comprises a rotational flow grit chamber, a membrane grid tank, an adjusting tank, an ecological chain reaction tank, an intermediate water collecting tank, an active carbon adsorption and high-efficiency sedimentation combined tank, a denitrification deep bed filter tank, a denitrification filter tank clean water tank and a chemical disinfection tank; the sewage outlet of the rotational flow grit chamber is connected with the sewage inlet of the membrane grid tank; the sewage outlet of the membrane grid tank is connected with the sewage inlet of the regulating tank; a sewage outlet of the regulating tank is connected with a sewage inlet of the ecological chain reaction tank; a sewage outlet of the ecological chain reaction tank is connected with a sewage inlet of the middle water collecting tank; the sewage outlet of the middle water collecting tank is connected with the sewage inlet of the active carbon adsorption and high-efficiency sedimentation combined tank; the supernatant outlet of the active carbon adsorption and high-efficiency sedimentation combined tank is connected with the inlet of the denitrification deep bed filter; the water outlet of the denitrification deep bed filter is connected with the water inlet of the denitrification filter clean water tank; the water outlet of the denitrification filter pool clean water tank is connected with the water inlet of the chemical disinfection tank.

2. The wastewater treatment combination system of claim 1, wherein: and a fine grid and a cyclone sand removing machine are arranged in the cyclone sand setting tank.

3. The wastewater treatment combination system of claim 1, wherein: the device also comprises a back-flushing wastewater tank, wherein a back-flushing wastewater outlet of the denitrification deep bed filter tank is connected with the back-flushing wastewater tank.

4. The integrated wastewater treatment system according to claim 1, wherein: and a submersible stirrer and a sewage lifting pump are arranged in the adjusting tank.

5. The wastewater treatment combination system of claim 1, wherein: and an automatic water quantity adjusting and controlling system is arranged between the sewage outlet of the adjusting tank and the sewage inlet of the ecological chain reaction tank.

6. The wastewater treatment combination system of claim 1, wherein: the active carbon adsorption and high-efficiency sedimentation combined tank comprises an active carbon adsorption tank, a coagulation reaction tank and a sedimentation tank, wherein the active carbon adsorption tank, the coagulation reaction tank and the sedimentation tank are sequentially connected, the active carbon adsorption tank is connected with a sewage outlet of a middle water collecting tank, and the sedimentation tank is connected with an inlet of a denitrification deep bed filter.

7. The wastewater treatment combination system of claim 6, wherein: a submersible stirrer is arranged in the active carbon adsorption tank; the coagulation reaction tank is internally divided into a coagulation reaction area and a flocculation reaction area, a mixing stirrer is arranged in the coagulation reaction area, and a flocculation stirrer is arranged in the flocculation reaction area.

8. The wastewater treatment combination system of claim 6, wherein: still include mud backwash pump and mud drainage pump, the bottom of the pool of sedimentation tank pass through mud backwash pump and flocculation reaction zone and be connected, the bottom of the pool of sedimentation tank still is connected with mud drainage pump.

9. The wastewater treatment combination system of claim 1, wherein: and a quartz sand filter material layer is arranged in the denitrification deep bed filter.

10. The integrated wastewater treatment system according to claim 1, wherein: the clear water tank of the denitrification filter tank is internally provided with a submersible pump, and the submersible pump is connected with a backwashing water inlet of the denitrification deep bed filter tank.