CN112209570A - Biogas air screen cultivation wastewater treatment system and device - Google Patents
Biogas air screen cultivation wastewater treatment system and device Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/08—Production of synthetic natural gas
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
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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
- C02F3/02—Aerobic processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention relates to a biogas air screen aquaculture wastewater treatment system and a device, which solve the problems of environment pollution caused by direct discharge of wastewater in a farm, unstable treatment capacity in a zero discharge technology and the like, and are characterized in that: the method comprises the steps of firstly carrying out double-layer multistage fermentation, filtering and precipitation on the culture manure, then heating the culture manure by using the self-produced part of methane, and finally evaporating the culture manure by using a wind screen evaporator, thereby realizing all-weather low-cost zero discharge of wastewater, and collecting methane energy which has certain pressure and can be directly conveyed and used without building a common methane tank. Has the advantages of simple structure, advanced process, energy saving, environmental protection, etc. The fermentation tank adopts an anaerobic and aerobic double-layer structure, so that the influence on the environment caused by large-area exposure of excrement is avoided; the biogas residue can be safely removed in the open air, so that the excrement sewage is directly fermented without dry-wet separation; the method can stabilize the wastewater treatment capacity (10-15 tons/day of a set of equipment) without a large amount of power-consuming dehumidifiers, greatly reduce the treatment cost and really realize the zero discharge of all-weather culture wastewater.
Description
Technical Field
The invention belongs to the field of aquaculture wastewater treatment, and particularly relates to a biogas air screen aquaculture wastewater treatment system and device.
Background
The aquaculture wastewater mainly comprises feces, urine, residual medicament mixed water and part of domestic sewage during aquaculture flushing, and has the advantages of large water quality and water quantity change, more suspended matters, high organic matter concentration, high ammonia nitrogen concentration, heavy metal and pathogenic bacteria contained and stink. A large amount of suspended matters are precipitated, so that soil pores are blocked, and the air permeability and the water permeability of the soil are reduced; high-concentration organic matters and ammonia nitrogen can unbalance soil nutrients, cause soil hardening and salinization, consume dissolved oxygen in a water body, and cause the water body to blacken and become smelly; heavy metals such as zinc, copper and the like contained in the livestock and poultry feed are easy to accumulate in soil, so that the soil heavy metals exceed the standard and the crop growth is influenced; pathogenic microorganisms and parasitic ova carried by the excrement of the livestock and poultry are spread through water sources or mosquitoes and flies, so that infection and even epidemic situation are easily caused; h accompanied by feces and urine of livestock and poultry2S、NH3Such gases may generate malodorous gases such as amine and sulfur, which may seriously affect the surrounding environment. In a word, the livestock and poultry breeding wastewater, especially the large-scale breeding wastewater needs to be treated urgently.
The patent technology of a culturing farm sewage treatment system (CN 209039292U) applied by the cinnabar power is that all pig manure is separated by a dry-wet separator, the separated dry manure can be directly bagged for sale or used as organic fertilizer, the extruded sewage firstly flows into a combined fermentation tank or a red and black film methane tank for deep anaerobic fermentation, then flows into an oxidation pond or a three-level sedimentation tank, and then enters a glycolysis air screen system for evaporation treatment. A group of wind screens (3 meters wide and 30 meters long) can treat 10-15 tons of wastewater daily and can treat the excrement generated by 500-2000 fat pigs in the storage fence scale. Although the scheme has the advantages of simple operation (one key is started), low operation cost (5 hairs and one ton in summer), small occupied area (about 90 square of a group of equipment), no sewage discharge outlet in the whole pig farm, zero discharge of the culture wastewater and the like, the dehumidifier needs to be started in winter and spring and rainy weather, the operation cost is greatly improved, and the requirement of the farm cannot be met in all weather.
The construction cost of the existing common methane tank is high; although the construction cost of the red and black film methane tank is low, the pressure of the produced methane is low, the methane needs to be pressurized, conveyed and used, and potential safety hazards exist; the methane in the anaerobic tank and the septic tank is hardly collected and utilized.
Disclosure of Invention
The invention aims to provide a biogas air screen cultivation wastewater treatment system and a biogas air screen cultivation wastewater treatment device which not only realize all-weather low-cost wastewater zero discharge, but also output biogas energy which can be directly used.
The technical scheme adopted by the invention is as follows: the method comprises the steps of firstly carrying out double-layer multistage anaerobic fermentation, aerobic fermentation, filtration and precipitation on culture manure, then heating by using a self-produced part of methane, and finally evaporating by using a wind screen evaporator, thereby realizing all-weather low-cost zero discharge of wastewater, and collecting methane energy which has certain pressure and can be directly conveyed and used without building a common methane tank; the specific process steps are as follows:
(1) the excrement in the sand setting tank of the farm enters the lower layer of the double-layer fermentation tank to be subjected to multistage anaerobic fermentation to generate methane;
(2) the biogas enters a gas holder for standby, and the filtered biogas slurry enters the upper layer of a fermentation tank for multi-stage aerobic fermentation and filtration;
(3) the oxidizing liquid enters a settling tank, the settling liquid enters a water heater and is heated by the self-produced part of methane, and the methane combustion flue gas enters the lower part of the air screen and rises along the air screen to evaporate hot air;
(4) part of the heated warm water in the warm water device enters the upper part of the evaporator, the wetting air screen carries out evaporation treatment, and water drops flowing down by the air screen enter a water return pool through the filter layer and flow back to the warm water device; the other part is injected into a fermentation tank to realize temperature rise and high-efficiency fermentation, so that the evaporation capacity of the wind screen and the biogas yield are not influenced by seasons and weather.
A biogas wind screen aquaculture wastewater treatment device comprises a grit chamber, a fermentation chamber and a wind screen evaporator, wherein the fermentation chamber is of a double-layer multi-stage structure consisting of a lower anaerobic layer and an upper aerobic layer, the grit chamber is communicated with a first-stage lower anaerobic layer through a pipeline, a filter chamber is arranged between a last stage of the lower anaerobic layer and a first stage of the upper aerobic layer, and the top of each lower anaerobic layer is provided with a biogas discharge port which is connected with a gas holder through a pipeline; a water return pool and a filter layer are arranged below the air screen evaporator; a settling tank and a water heater are arranged between the fermentation tank and the wind screen evaporator, the water heater is heated by methane combustion, combustion flue gas enters the lower part of the wind screen through a pipeline, and hot air evaporation is carried out on the settling liquid on the wind screen; the sedimentation tank is connected with the last-stage upper aerobic layer of the fermentation tank through a cold water pump, a main water inlet of the water heater is connected with an overflow port of the sedimentation tank through a pipeline, and a secondary water inlet is connected with a water outlet arranged at the bottom of the water return tank through a pipeline; the water outlet of the warm water device is connected with the inlet of the warm water pump through a pipeline, one way of the outlet of the warm water pump is connected with a spray pipe arranged at the top of the air screen evaporator through a pipeline provided with a valve, and the other way of the outlet of the warm water pump is connected with a spray valve arranged at the bottom of the anaerobic layer at the lower layer of the fermentation tank through a pipeline provided with a valve.
Furthermore, the filter layer in the filter tank is river sand, after the filter layer of the river sand is partially blocked, the filter layer is timely washed by a sand pump, the generated organic scum returns to the fermentation tank for continuous fermentation, and the river sand with organic impurities removed is continuously used as a filter material. The filter layer that the return water pond top set up is the chaff, and this chaff filter layer part blocks up the back, should change in time. The replaced rice husk can be dried in the sun to be used as fuel.
Furthermore, the water inlet pipe arranged at the bottom of the lower anaerobic layer is an inclined nozzle, so that when warm water is injected, the water inlet pipe has a stirring effect on the anaerobic layer.
Furthermore, an atomizing nozzle is arranged above the air screen, so that the air-liquid contact area, namely the evaporation area, is further increased. Besides the moisture of the wet wind screen, the fine fog drops also have the evaporation function.
Furthermore, oxygen is added to the upper layer of the fermentation tank, an oxygen adding pipe is selectively laid at the bottom of the upper layer of the fermentation tank, and the oxygen adding pipe is fully distributed with vent holes, so that the introduced air is uniformly distributed at the bottom of the fermentation tank.
Furthermore, duckweed, water hyacinth and stocked fish and shrimp can be planted on the upper layer of the fermentation tank.
Furthermore, an ecological wetland can be additionally arranged between the fermentation tank and the sedimentation tank.
Furthermore, the two sides of the air inlet and the air outlet which are vertical to the wind screen are optionally additionally provided with a liftable wind screen, and the wind screen is lifted in a sunny day with wind; and in windless rainy days, the wind screen is lowered, so that the evaporated hot gas forms natural convection. In order to accelerate natural convection, an exhaust fan can be additionally arranged at the top of the air screen.
Further, a temperature measuring probe is additionally arranged on the water heater 7, and an automatic control system for automatically adjusting the flow of the biogas according to the set temperature of the water heater is established; the temperature measuring probe is additionally arranged on the lower anaerobic layer of the fermentation tank, the valves 13 and 14 are automatic control valves, an anaerobic fermentation temperature control system for automatically adjusting the flow of the valves 13 and 14 according to the temperature of the fermentation tank is established, and the temperature is controlled to be 35-40 ℃.
Furthermore, the interlayer in the middle of the double-layer tank is in a reversed pot shape and can be made of plastic films, glass fiber reinforced plastics, iron sheets, cement and other materials. The pressure of the output biogas is P = h rho g, wherein h is the height between the top end of the reversed pot-shaped separation layer and the liquid level.
Furthermore, A, B two-stage settling ponds are arranged between the fermentation pond and the water heater, and in the mixing tank at the water inlet of each stage of settling pond, precipitating agents A and B are respectively added at regular intervals, and precipitates at the bottom of the settling pond are taken out at regular intervals to be used as fertilizers.
The invention has the beneficial effects that: because the fermentation tank adopts an anaerobic and aerobic double-layer structure, the condition that the large-area exposure of excrement and sewage affects the environment is avoided; the fermentation tank can be periodically pumped dry, the middle interlayer is lifted, biogas residues are safely removed in the open air, and the excrement sewage is directly fermented without dry-wet separation; meanwhile, a large amount of biogas with certain pressure can be collected for life production; further, the biogas is used as a heat source to heat the treatment liquid, so that the evaporation is accelerated; then, the heat treatment liquid can be injected into the lower anaerobic layer of the fermentation tank again to control the temperature and ferment efficiently, and more methane is produced; and the smoke generated in the methane combustion process can be used as hot air, so that the evaporation of the air screen is further accelerated. The invention can treat the excrement, output the methane and beautify the environment by simply transforming the septic tank without building the methane tank. The invention can stabilize the wastewater treatment capacity (10-15 tons/day of a set of equipment) without a dehumidifier which consumes a large amount of electric energy, greatly reduce the treatment cost and really realize the zero discharge of all-weather culture wastewater.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram of the structure layout of the product of the present invention.
In the figure: 1 is a grit chamber, 2 is a fermentation tank, 3 is a lower anaerobic layer, 4 is a filtering tank, 5 is an upper aerobic layer, 6 is a cold water pump, 7 is a warm water device, 8 is a warm water pump, 9 is a settling tank, 10 is an evaporator, 11 is a return water tank, 12 is a return pipe, 13 is a first valve, 14 is a water spraying valve, 15 is a second valve, 16 is a gas holder, and 17 is a filtering layer.
Detailed Description
As shown in figure 1, the biogas wind screen culture wastewater treatment system firstly carries out double-layer multistage anaerobic fermentation, aerobic fermentation, filtration and precipitation on culture manure, then uses the biogas generated by a self-production part for heating, and finally evaporates through a wind screen evaporator, thereby realizing all-weather low-cost wastewater zero discharge, and collecting biogas energy which has certain pressure and can be directly conveyed and used without building a common biogas digester; the specific process steps are as follows:
(1) the excrement in the sand setting tank of the farm enters the lower layer of the double-layer fermentation tank to be subjected to multistage anaerobic fermentation to generate methane;
(2) the biogas enters a gas holder for standby, and the filtered biogas slurry enters the upper layer of a fermentation tank for multi-stage aerobic fermentation and filtration;
(3) the oxidizing liquid enters a settling tank, the settling liquid enters a water heater and is heated by the self-produced part of methane, and the methane combustion flue gas enters the lower part of the air screen and rises along the air screen to evaporate hot air;
(4) part of the heated warm water in the warm water device enters the upper part of the evaporator, the wetting air screen carries out evaporation treatment, and water drops flowing down by the air screen enter a water return pool through the filter layer and flow back to the warm water device; the other part is injected into a fermentation tank to realize temperature rise and high-efficiency fermentation, so that the evaporation capacity of the wind screen and the biogas yield are not influenced by seasons and weather.
The biogas wind screen culture wastewater treatment device comprises a grit chamber, a fermentation tank, a wind screen evaporator and the like, wherein the fermentation tank 2 is of a double-layer multi-stage structure consisting of a lower anaerobic layer 3 and an upper aerobic layer 5, the grit chamber 1 is communicated with a first-stage lower anaerobic layer 3 of the fermentation tank 2 through a pipeline, a filter tank 4 is arranged between the last stage of the lower anaerobic layer 3 and the first stage of the upper aerobic layer 5, and the top of each lower anaerobic layer 3 is provided with a biogas discharge port which is connected with a gas cabinet 16 through a pipeline; a water return pool 11 and a filter layer 17 are arranged below the air screen evaporator 10; a settling tank 9 and a water heater 7 are arranged between the fermentation tank 2 and the wind screen evaporator 10, the water heater 7 is heated by methane combustion, combustion flue gas enters the lower part of the wind screen through a pipeline, and hot air evaporation is carried out on settling liquid on the wind screen; the A-stage settling tank of the settling tank 9 is connected with the last-stage upper aerobic layer 5 of the fermentation tank 2 through a cold water pump 6, a main water inlet of a water heater 7 is connected with an overflow port of the settling tank 9 through a pipeline, and a secondary water inlet is connected with a water outlet arranged at the bottom of a water return tank 11 through a pipeline; the water outlet of the warm water device 7 is connected with the inlet of the warm water pump 8 through a pipeline, one path of the outlet of the warm water pump (8) is connected with a water spraying pipe arranged at the top of the air screen evaporator 10 through a pipeline provided with a second valve 15, and the other path of the outlet of the warm water pump is connected with a water spraying valve 14 arranged at the bottom of the lower anaerobic layer 3 of the fermentation tank 2 through a pipeline provided with a first valve 13.
The filter layer in the filter tank 4 is river sand, after the filter layer of the river sand is partially blocked, a mud sand pump is used for washing in time, the generated organic scum returns to the fermentation tank for continuous fermentation, and the river sand with organic impurities removed is continuously used as a filter material; the filtering layer 17 arranged above the water return tank 11 is made of chaff, the chaff filtering layer is replaced in time after being partially blocked, and the replaced chaff can be dried in the sun to be used as fuel.
The water inlet pipe arranged at the bottom of the lower anaerobic layer 3 is an inclined nozzle, so that when warm water is injected, the anaerobic layer is stirred.
An atomizing nozzle is arranged above the wind screen evaporator 10, the gas-liquid contact area, namely the evaporation area, is further increased, and fine fog drops have the evaporation effect besides the moisture evaporated by the wind screen.
An oxygen increasing pipe is selectively laid at the bottom of the upper aerobic layer 5 of the fermentation tank 2, the oxygen increasing pipe is fully distributed with vent holes, oxygen is added into the upper aerobic layer 5 of the fermentation tank 2, and the introduced air is uniformly distributed at the bottom of the tank.
Duckweed, water hyacinth and stocking fishes and shrimps are planted in the upper aerobic layer 5 of the fermentation tank 2.
An ecological wetland is arranged between the fermentation tank 2 and the sedimentation tank 9.
A liftable wind screen is optionally additionally arranged on the air inlet side and the air outlet side which are vertical to the wind screen in the wind screen evaporator 10, and the wind screen is lifted in a sunny day with wind; in windless rainy days, the wind screen is lowered to form natural convection of the evaporated hot gas, and an exhaust fan can be additionally arranged at the top of the wind screen to accelerate the natural convection.
The water heater 7 is provided with a temperature measuring probe, and an automatic control system for automatically adjusting the flow of the biogas according to the set temperature of the water heater is established; the lower anaerobic layer 3 of the fermentation tank 2 is provided with a temperature measuring probe, the first valve 13, the water spraying valve 14 and the second valve 15 are all automatic control valves, an anaerobic fermentation temperature control system for automatically adjusting the flow of the first valve 13 and the water spraying valve 14 according to the temperature of the fermentation tank is established, and the temperature is controlled to be 35-40 ℃.
The interlayer in the middle of the double-layer fermentation tank 2 is in a reversed pot shape and is made of plastic films, glass fiber reinforced plastics, iron sheets and cement, the pressure of output biogas is P = h rhog, and h is the height from the top end of the reversed pot-shaped interlayer to the liquid level.
A, B two-stage settling tanks are arranged between the fermenting tank and the water heater, and in the mixing tank at the water inlet of each settling tank, precipitating agents A and B are respectively added at regular intervals, and precipitates at the bottom of the settling tank are taken out at regular intervals to be used as fertilizers.
When the invention is implemented, excrement in a farm is collected into the grit chamber 1, the excrement enters the lower anaerobic layer 3 of the fermentation tank 2, and after multi-stage anaerobic fermentation, the generated biogas enters the gas holder 16 from the gas outlet arranged at the top of the lower anaerobic layer 3 for storage so as to be used as a heat source of a water heater and be used for daily life production of people. The biogas slurry is filtered by river sand in the filter tank 4 and enters the upper aerobic layer 5, after multi-stage fermentation and sedimentation filtration, the oxidation liquid is pumped into the sedimentation tank 9 through the cold air pump 6 and then overflows into the water heater 7 for heating. The heated settled liquid is sent into a water spraying pipe arranged at the top of the wind screen evaporator 10 through a pipeline provided with a second valve 15 to be sprayed on the wind screen, and the heated settled liquid is sent into the lower anaerobic layer 3 through a pipeline provided with a first valve 13 and a water spraying valve 14 arranged at the bottom of the lower anaerobic layer 3 to increase the temperature in the tank and accelerate the fermentation speed of the biogas slurry. Flue gas generated in the combustion process of the water heater 7 enters the air screen evaporator 10 from the filter layer 17 above the water return pool 11 to evaporate biogas slurry sprayed on the air screen, water vapor is discharged into the air, and water drops flowing downwards pass through the husk filter layer 17 and then enter the water heater 7 from the water return pool 11 through the pipeline 12.
The experimental data of the methane heating evaporation and the natural evaporation in the existing process are recorded as follows:
compared with the prior art, the method has the advantages that the wastewater treatment capacity is large (11-18 tons/day for a group of equipment), the operation cost is low (below 0.25 yuan/ton), the whole pig farm has no sewage discharge outlet, and all-weather zero-discharge of the culture wastewater is really realized.
Compared with the existing common methane tank, the fermentation tank of the invention has simple construction, low cost and easy methane residue cleaning; compared with the red and black film methane tanks, the collected methane has certain pressure, does not need to be pressurized for use, and does not have potential safety hazard; compared with the common septic tank and the anaerobic tank, the methane is produced, the odor is reduced, and the influence on the environment is less.
Claims (12)
1. A sewage treatment system is bred to marsh gas wind-screen, its technical characterstic is: the method comprises the steps of firstly carrying out double-layer multistage anaerobic fermentation, aerobic fermentation, filtration and precipitation on culture manure, then heating by using a self-produced part of methane, and finally evaporating by using a wind screen evaporator, thereby realizing all-weather low-cost zero discharge of wastewater, and collecting methane energy which has certain pressure and can be directly conveyed and used without building a common methane tank; the specific process steps are as follows:
(1) the excrement in the sand setting tank of the farm enters the lower layer of the double-layer fermentation tank to be subjected to multistage anaerobic fermentation to generate methane;
(2) the biogas enters a gas holder for standby, and the filtered biogas slurry enters the upper layer of a fermentation tank for multi-stage aerobic fermentation and filtration;
(3) the oxidizing liquid enters a settling tank, the settling liquid enters a water heater and is heated by the self-produced part of methane, and the methane combustion flue gas enters the lower part of the air screen and rises along the air screen to evaporate hot air;
(4) part of the heated warm water in the warm water device enters the upper part of the evaporator, the wetting air screen carries out evaporation treatment, and water drops flowing down by the air screen enter a water return pool through the filter layer and flow back to the warm water device; the other part is injected into a fermentation tank to realize temperature rise and high-efficiency fermentation, so that the evaporation capacity of the wind screen and the biogas yield are not influenced by seasons and weather.
2. The utility model provides a waste water treatment device is bred to marsh gas wind-shield, it comprises grit chamber, fermentation vat and wind-shield evaporimeter, its characterized in that: the fermentation tank (2) is of a double-layer multi-stage structure consisting of a lower anaerobic layer (3) and an upper aerobic layer (5), the grit chamber (1) is communicated with a first-stage lower anaerobic layer (3) of the fermentation tank (2) through a pipeline, a filter tank (4) is arranged between the last stage of the lower anaerobic layer (3) and the first stage of the upper aerobic layer (5), and the top of each lower anaerobic layer (3) is provided with a methane discharge port and is connected with a gas cabinet (16) through a pipeline; a water return pool (11) and a filter layer (17) are arranged below the air screen evaporator (10); a settling tank (9) and a water heater (7) are arranged between the fermentation tank (2) and the wind screen evaporator (10), the water heater (7) is heated by methane combustion, combustion flue gas enters the lower part of the wind screen through a pipeline, and hot air evaporation is carried out on the settling liquid on the wind screen; the sedimentation tank (9) is connected with the last-stage upper aerobic layer (5) of the fermentation tank (2) through a cold water pump (6), a main water inlet of the water heater (7) is connected with an overflow port of the sedimentation tank (9) through a pipeline, and a secondary water inlet is connected with a water outlet arranged at the bottom of the water return tank (11) through a pipeline (12); the water outlet of the water heater (7) is connected with the inlet of the warm water pump (8) through a pipeline, one way of the outlet of the warm water pump (8) is connected with a water spraying pipe arranged at the top of the air screen evaporator (10) through a pipeline provided with a second valve (15), and the other way of the outlet of the warm water pump is connected with a water spraying valve (14) arranged at the bottom of the lower anaerobic layer (3) of the fermentation tank (2) through a pipeline provided with a first valve (13).
3. The biogas air screen aquaculture wastewater treatment device of claim 2, characterized in that: the filter layer in the filter tank (4) is river sand, and the filter layer (17) arranged above the water return tank (11) is rice husk.
4. The biogas air screen aquaculture wastewater treatment device of claim 2 or 3, characterized in that: the water inlet pipe arranged at the bottom of the lower anaerobic layer (3) is an inclined nozzle.
5. The biogas air screen aquaculture wastewater treatment device of claim 4, characterized in that: the water spray pipe arranged at the top of the air screen evaporator (10) is a warm water porous atomization water spray pipe.
6. The biogas air screen aquaculture wastewater treatment device of claim 5, characterized in that: adding oxygen into the upper aerobic layer (5) of the fermentation tank (2), and laying an oxygen adding pipe at the bottom of the upper aerobic layer (5) of the fermentation tank (2) selectively.
7. The biogas air screen aquaculture wastewater treatment device of claim 6, characterized in that: duckweed, water hyacinth and stocking fishes and shrimps are planted in the aerobic layer (5) on the upper layer of the fermentation tank (2).
8. The biogas air screen aquaculture wastewater treatment device of claim 7, characterized in that: an ecological wetland is arranged between the fermentation tank (2) and the sedimentation tank (9).
9. The biogas air screen aquaculture wastewater treatment device of claim 8, characterized in that: the air inlet and outlet sides in the air screen evaporator (10) vertical to the air screen are optionally additionally provided with a liftable air blocking curtain, and the top of the air screen is additionally provided with a chimney and an exhaust fan.
10. The biogas air screen aquaculture wastewater treatment device of claim 9, characterized in that: temperature probes are arranged on the water heater (7) and the lower anaerobic layer (3) of the fermentation tank (2), the first valve (13), the water spraying valve (14) and the second valve (15) are all automatic control valves, an anaerobic fermentation temperature control system for automatically adjusting the flow of the first valve (13) and the water spraying valve (14) according to the temperature of the fermentation tank is established, and the temperature is controlled at 35-40 ℃.
11. The biogas air screen aquaculture wastewater treatment device of claim 10, characterized in that: the interlayer in the middle of the double-layer fermentation tank (2) is in a reversed pot shape and is made of plastic films, glass fiber reinforced plastics, iron sheets and cement, the pressure of output biogas is P = h rho g, and h is the height from the top end of the reversed pot-shaped interlayer to the liquid level.
12. The biogas air screen aquaculture wastewater treatment device of claim 11, wherein: the settling tank (9) is of a two-stage structure, and in a mixing tank at the water inlet of each stage of settling tank, precipitating agents A and B are respectively added at regular intervals, and precipitates at the bottom of the settling tank are taken out at regular intervals to serve as fertilizers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011071830.5A CN112209570A (en) | 2020-10-09 | 2020-10-09 | Biogas air screen cultivation wastewater treatment system and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011071830.5A CN112209570A (en) | 2020-10-09 | 2020-10-09 | Biogas air screen cultivation wastewater treatment system and device |
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| CN112209570A true CN112209570A (en) | 2021-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011071830.5A Pending CN112209570A (en) | 2020-10-09 | 2020-10-09 | Biogas air screen cultivation wastewater treatment system and device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113371770A (en) * | 2021-07-16 | 2021-09-10 | 江西挺进环保科技股份有限公司 | System for plant wastewater treatment and resource utilization |
| CN113735371A (en) * | 2021-08-23 | 2021-12-03 | 启东利城环境工程有限公司 | System and process for treating livestock and poultry excrement sewage |
| CN113754185A (en) * | 2021-08-28 | 2021-12-07 | 广东昂为环保产业有限公司 | Fecal sewage concentration and storage equipment and treatment method for northern rural areas |
| CN114315027A (en) * | 2021-12-28 | 2022-04-12 | 生态环境部华南环境科学研究所 | Harmless treatment method for natural storage of liquid manure and natural storage pool thereof |
| CN117383972A (en) * | 2022-12-29 | 2024-01-12 | 刘明 | Easy-to-ferment household garbage accumulation equipment |
-
2020
- 2020-10-09 CN CN202011071830.5A patent/CN112209570A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113371770A (en) * | 2021-07-16 | 2021-09-10 | 江西挺进环保科技股份有限公司 | System for plant wastewater treatment and resource utilization |
| CN113735371A (en) * | 2021-08-23 | 2021-12-03 | 启东利城环境工程有限公司 | System and process for treating livestock and poultry excrement sewage |
| CN113754185A (en) * | 2021-08-28 | 2021-12-07 | 广东昂为环保产业有限公司 | Fecal sewage concentration and storage equipment and treatment method for northern rural areas |
| CN114315027A (en) * | 2021-12-28 | 2022-04-12 | 生态环境部华南环境科学研究所 | Harmless treatment method for natural storage of liquid manure and natural storage pool thereof |
| CN117383972A (en) * | 2022-12-29 | 2024-01-12 | 刘明 | Easy-to-ferment household garbage accumulation equipment |
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