CN109678300B - Bean product sewage treatment method and system - Google Patents
Bean product sewage treatment method and system Download PDFInfo
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- CN109678300B CN109678300B CN201910112448.5A CN201910112448A CN109678300B CN 109678300 B CN109678300 B CN 109678300B CN 201910112448 A CN201910112448 A CN 201910112448A CN 109678300 B CN109678300 B CN 109678300B
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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
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
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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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- 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
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- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a bean product sewage treatment method, which is characterized in that bean product sewage is filtered by a filter grid, and suspended solids and floating objects are transported outside; taking filtered sewage for primary precipitation; taking the upper layer liquid and adding a pH regulator; then sending the liquid into an anaerobic reaction tank for reaction; after scum is filtered out from the reacted liquid, the reacted liquid is sent into a biological contact oxidation reaction tank for reaction; and (4) performing flocculation precipitation on the reacted liquid, standing for layering, and discharging the supernatant. The method has the advantages of high treatment efficiency and stability. The invention also discloses a system for the bean product sewage treatment method, which comprises a sewage pretreatment device, a primary sedimentation tank, an adjusting tank, an anaerobic reaction tank, a filtering tank, a biological contact oxidation reaction tank, a sedimentation tank and a clean water tank which are sequentially connected through pipelines. The system has large water treatment amount, is suitable for large bean product processing enterprises and processing parks, and can directly discharge the treated water into municipal sewage pipe networks.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a bean product sewage treatment method and system.
Background
The sewage for processing the bean products mainly comprises bean soaking, bean soaking and squeezing wastewater of raw material soybeans and washing sewage, and mainly comes from bean washing water, bean soaking water, slurry and residue separation water, press filtration water, washing water of various production process containers, ground washing water and the like. The COD of the yellow swill in the sewage is up to 20000-30000 mg/L, and the COD of the soybean soaking water is 4000-8000 mg/L. The sewage has high content of organic pollutants and is high-concentration organic polluted wastewater which pollutes the environment. Because the bean product production belongs to the intermittent production mode, the drainage time is concentrated, the water yield and the water quality are very uneven, and the treatment effect is easy to deteriorate and frequent maintenance is needed in the sewage treatment process in the prior art. Therefore, it is necessary to develop a bean product wastewater treatment method and system capable of solving the above problems.
Disclosure of Invention
The invention aims to provide a bean product sewage treatment method.
The invention also provides a system for the bean product sewage treatment method.
The first object of the present invention is achieved by comprising the steps of: filtering bean product sewage by using a filtering grid, and transporting suspended solids and floating objects; taking filtered sewage, adding sodium hydroxide into the filtered sewage, and performing primary precipitation; taking the upper layer liquid, adding a pH regulator, and regulating the pH value to 6-8; then sending the liquid into an anaerobic reaction tank for reaction, and recovering the generated methane; after scum is filtered out from the reacted liquid, the reacted liquid is sent into a biological contact oxidation reaction tank for reaction; taking the liquid after reaction, adding coagulant aid and flocculating agent for flocculation and precipitation, standing for layering, and discharging the supernatant.
The second purpose of the invention is realized by comprising a sewage pretreatment device, a primary sedimentation tank, a regulating tank, an anaerobic reaction tank, a filter tank, a biological contact oxidation reaction tank, a sedimentation tank and a clean water tank which are sequentially connected through pipelines.
The invention has the beneficial effects that:
1. the method adopts the treatment process of pretreatment filtration, primary precipitation, anaerobic biological treatment and biological contact oxidation treatment, and finally secondary precipitation, is particularly suitable for the treatment condition of high-concentration organic pollutant industrial sewage in bean product processing and the like, has the advantages of high efficiency and stability in treatment, and ensures that the effluent quality meets the municipal environmental protection requirement;
2. the system firstly filters the inlet water through the sewage pretreatment device, then carries out precipitation treatment in the primary sedimentation tank, and the adjusting tank plays a role in adjusting the pH value of the sewage, thereby being beneficial to the treatment of the subsequent procedures; the anaerobic reaction tank and the biological contact oxidation reaction tank have the advantage of high reaction efficiency; then carrying out secondary sedimentation in a sedimentation tank, sending supernatant into a clean water tank, and treating sediments and excessive sludge generated in other working procedures by a sludge concentration tank and a filter press to obtain sludge cakes convenient for outward transportation; the system of the invention has large water treatment amount which can reach 2000m3The method is suitable for large bean product processing enterprises and processing parks, has the advantages of stability and high efficiency, and can directly discharge the treated water into a municipal sewage pipe network to meet the requirement of environmental protection;
3. the multiple water collection sections of the sewage pretreatment device can meet the production requirements of large wastewater flow and high treatment capacity requirement, and are also suitable for the production condition of small flow; in the cleaning process of the filter grids of other water collecting sections, uninterrupted filtration is realized, the treatment is stable, and the filtering effect is guaranteed; the inclined surface of the water collection section is favorable for washing the filter grating of the next water collection section by water flow and discharging the filter grating from the discharge pipe, so that the function of cleaning other filter gratings except the filter grating in the first working state on line is realized;
4. the anaerobic reaction tank reacts with sewage through a sludge bed and a suspension layer, and the digestion gas, sludge and treated sewage can be separated by the three-phase separator matched with the gas-liquid separator, so that the anaerobic reaction tank has the advantages of stability and high efficiency; in the reaction process, the gas-collecting mud-guiding hood can guide the falling mud to two sides of the suspension layer on one hand, which is beneficial to fast dispersion of the mud, thereby improving the reaction efficiency; on the other hand, the gas-collecting mud-guiding hood with the small upper part and the large lower part plays a role of gathering the digestion gas, so that the digestion gas is flushed with the fallen sludge through the upper ring body, the sludge is pumped back, the sludge is flushed to the periphery above the gas-collecting mud-guiding hood and falls from the periphery of the gas-collecting mud-guiding hood, and the sludge dispersion effect is further improved; the gas-collecting mud-guiding hood has an automatic vertical folding function under the action of the upper cylinder and the lower cylinder, and under the condition that the gas-collecting mud-guiding hood is not needed, the folded gas-collecting mud-guiding hood plays a role in preventing digestive bubbles from ascending and preventing sludge from falling, so that the normal work of a reaction area is guaranteed;
5. the oxidation reaction tank body of the biological contact oxidation reaction tank is internally provided with a plurality of layered inclined plates, and the sewage can be distributed in a reaction area formed by biological fillers and aeration pipes on each layered inclined plate in the flowing process through the overflow ends of the layered inclined plates, so that the reaction efficiency is improved; the flow of the sewage is smoother in the aeration process; the flow baffle has the function of changing the flow direction of sewage, so that the sewage is fully oxygenated and the contact reaction effect of the sewage and the biological filler is ensured; when the biological contact oxidation reaction tank works for a period of time, the electromagnetic valve is opened, so that the sewage on each layered inclined plate falls through the liquid outlet pipe, the lower end of each layered inclined plate is prevented from generating a sewage flowing dead angle, and the normal treatment of equipment is guaranteed; the electromagnetic valve of the uppermost layered inclined plate can be intermittently opened according to the requirement, so that the falling amount of liquid is increased, the dissolved oxygen is further rapidly increased, and the aeration power consumption is reduced; the electromagnetic valves of a single layer and a plurality of layers from the uppermost layered inclined plate can be opened for a long time, and the electromagnetic valves of the double layers are in a closed state, so that the reaction time and the reaction effect of the sewage and the biological filler are ensured while the dissolved oxygen is rapidly increased; the circulating pump plays a role in continuously circulating the sewage in the tank body, so that the reaction time is prolonged, and the reaction effect is further improved;
6. the biogas desulfurization and dehydration recovery device can quickly and conveniently replace the dehydration filler and the desulfurization filler, does not influence the normal treatment of biogas, and realizes online maintenance; the humidity and the content of hydrogen sulfide gas at the gas outlet pipe can be monitored at any time, so that the dehydration and desulfurization effects are guaranteed; before opening the maintenance sliding door, can be earlier according to second hydrogen sulfide gas sensor monitoring condition, will dewater and overhaul the indoor gas outgoing back of overhaul room, desulfurization overhaul, guarantee operation safety again.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic structural diagram of a sewage pretreatment device;
FIG. 3 is a schematic structural diagram of an anaerobic reaction tank;
fig. 4 is a structural schematic view of the gas-collecting mud-guiding hood in fig. 3 in a use state after being folded;
FIG. 5 is a schematic structural diagram of a biological contact oxidation reaction tank;
FIG. 6 is a schematic structural diagram of a biogas desulfurization dehydration recovery device;
in the figure: 1-a sewage pretreatment device, 1 a-a water collecting well, 1 b-a filtering grid, 1 c-a pretreatment water inlet pipe, 1 d-a pretreatment water outlet pipe, 1 e-a discharge pipe, 1 f-a bracket, 1 g-a driving mechanism, 2-a primary sedimentation tank, 3-a regulating tank, 4-an anaerobic reaction tank, 4 a-an anaerobic reaction tank body, 4 b-an anaerobic reaction water distribution pipe, 4 c-an anaerobic reaction water inlet pipe, 4 d-a three-phase separator, 4 e-a gas-liquid separator, 4 f-an exhaust pipe, 4 g-an upper guide rail, 4 h-a lower guide rail, 4 i-an upper slide block, 4 j-a lower slide block, 4 k-an upper cylinder, 4 l-a lower cylinder, 4 m-an upper ring body, 4 n-a lower ring body and 4 o-elastic cloth, 4 p-upper connecting rod, 4 q-lower connecting rod, 5-filtering tank, 6-biological contact oxidation reaction tank, 6 a-oxidation reaction tank body, 6 b-layered inclined plate, 6 c-aeration pipe, 6 d-packing frame, 6 e-liquid dropping pipe, 6 f-contact oxidation liquid inlet pipe, 6 g-contact oxidation liquid outlet pipe, 6 h-baffle plate, 6 i-circulating pipe, 6 j-circulating pump, 7-sedimentation tank, 8-clean water tank, 9 a-shell, 9 b-upper slide rail, 9 c-lower slide rail, 9 d-dehydration maintenance chamber, 9 e-dehydration packing bracket, 9 f-dehydration packing bracket driving device, 9 g-desulfurization maintenance chamber, 9 h-desulfurization packing bracket, 9 i-desulfurization packing bracket driving device, the system comprises a 9 j-biogas distribution pipe, a 9 k-air inlet pipe, a 9 l-air outlet pipe, a 9 m-bracket mouth sealing plate, a 9 n-humidity sensor, a 9 o-first hydrogen sulfide gas sensor, a 9 p-maintenance reminder, a 9 q-second hydrogen sulfide gas sensor and a 9 r-hydrogen sulfide gas alarm.
Detailed Description
The invention is further described with reference to the accompanying drawings, but the invention is not limited in any way, and any alterations or substitutions based on the teaching of the invention are within the scope of the invention.
The method comprises the following steps: filtering bean product sewage by using a filtering grid, and transporting suspended solids and floating objects; taking filtered sewage, adding sodium hydroxide into the filtered sewage, and performing primary precipitation; taking the upper layer liquid, adding a pH regulator, and regulating the pH value to 6-8; then sending the liquid into an anaerobic reaction tank for reaction, and recovering the generated methane; after scum is filtered out from the reacted liquid, the reacted liquid is sent into a biological contact oxidation reaction tank for reaction; taking the liquid after reaction, adding coagulant aid and flocculating agent for flocculation and precipitation, standing for layering, and discharging the supernatant.
Preferably, the sludge produced by the anaerobic reaction tank, the sludge produced by the biological contact oxidation reaction tank and the sediment of the flocculation precipitation are respectively taken out and combined, then the sludge cake is obtained through concentration and pressure filtration, the sludge cake is transported outside, and the filtrate is sent back to the stock solution in the step of adjusting the pH value.
Preferably, the pH regulator is sodium hydroxide, the coagulant aid is PAM, and the flocculant is PAC.
The system for bean product sewage treatment method of the invention as shown in attached figures 1-6 comprises a sewage pretreatment device 1, a primary sedimentation tank 2, a regulating tank 3, an anaerobic reaction tank 4, a filtering tank 5, a biological contact oxidation reaction tank 6, a sedimentation tank 7 and a clean water tank 8 which are connected in sequence through pipelines.
Preferably, the device also comprises a sludge concentration tank and a filter press, wherein the sludge concentration tank is respectively connected with a sludge discharge end of the anaerobic reaction tank 4, a sludge discharge end of the biological contact oxidation reaction tank 6 and a sludge discharge end of the sedimentation tank 7, the filter press is connected with a discharge end of the sludge concentration tank, a liquid discharge end of the sludge concentration tank is connected with the regulating tank 3 through a pipeline, and a liquid discharge end of the sedimentation tank 7 is connected with the regulating tank 3 through a pipeline.
Preferably, the sewage pretreatment device 1 comprises a water collecting well 1a and a filtering grid 1b arranged in the water collecting well 1a, a pretreatment water inlet pipe 1c is arranged at the upper part of the side surface of the water collecting well 1a, a pretreatment water outlet pipe 1d is arranged at the bottom of the water collecting well 1a, the water collecting well 1a comprises at least two water collecting sections from top to bottom, the diameters of the water collecting sections are sequentially reduced from top to bottom, the lower part of each water collecting section is inclined towards the center of the water collecting section, a discharge port is arranged on the inclined surface of each water collecting section and connected with a discharge pipe 1e, the discharge pipe 1e is provided with a gate valve, the filtering grids 1d are respectively arranged in the water collecting sections, a support 1f is arranged above the water collecting well 1a, a plurality of driving mechanisms 1g are arranged on the support 1f, each driving mechanism 1g is correspondingly connected with one filtering grid 1b, so that the driving mechanism 1g can drive the filtering grids 1b to move up and down in the water collecting sections, the pretreatment water outlet pipe 1d is connected with the water inlet end of the primary sedimentation tank 2 through a pipeline.
Preferably, the collector well 1a has three collector sections.
Preferably, the filtering grille 1b is provided with a counterweight, the driving mechanism 1g is a winch, and a winch rope is connected with the top of the filtering grille 1 b.
Preferably, the filtering grids 1b are formed by sequentially stacking a plurality of filtering grid plates.
Preferably, a sewage disposal platform is arranged below the support 1 f.
Preferably, the water collecting well 1a is a concrete water collecting well.
Preferably, the top of the water collecting well 1a is provided with a split well cover.
Preferably, the split well lid is provided with a fence around, and the fence is provided with a safety sign and a lighting device.
Preferably, the discharge pipe 1e is connected with the pretreatment water inlet pipe 1c through a pipeline, and the pipeline is provided with a reflux delivery pump.
Preferably, the anaerobic reaction tank 4 comprises an anaerobic reaction tank body 4a, an anaerobic reaction water distribution pipe 4b is arranged at the bottom in the anaerobic reaction tank body 4a, the anaerobic reaction water distribution pipe 4b is connected with an anaerobic reaction water inlet pipe 4c, the anaerobic reaction water inlet pipe 4c is connected with the water outlet end of the regulating tank 3 through a pipeline, a three-phase separator 4d is arranged at the upper part in the anaerobic reaction tank body 4a, a gas-liquid separator 4e is arranged above the three-phase separator 4d, the region between the three-phase separator 4d and the bottom of the anaerobic reaction tank body 4a is a reaction region, the lower part of the reaction region is a sludge bed, the upper part of the reaction region is a suspension layer, drain pipes are arranged on the side surfaces of the three-phase separator 4d and the gas-liquid separator 4e, the drain pipes are connected with the water inlet end of the filtering tank 5 through a pipeline, an exhaust pipe 4f is arranged at the top of the gas-liquid separator 4e, an upper guide rail 4g and an upper guide rail are arranged on the inner wall of the reaction tank body below the three-phase separator 4d, The anaerobic reaction tank comprises a lower guide rail 4h, an upper slide block 4i is arranged on the upper guide rail 4g, a lower slide block 4j is arranged on the lower guide rail 4h, an upper air cylinder 4k and a lower air cylinder 4l are horizontally arranged on two sides outside an anaerobic reaction tank body 4a, a piston rod of the upper air cylinder 4k penetrates through the anaerobic reaction tank body 4a to be connected with the side surface of the upper slide block 4i, so that the upper air cylinder 4k can drive the upper slide block 4i to move on the upper guide rail 4g, a piston rod of the lower air cylinder 4l penetrates through the anaerobic reaction tank body 4a to be connected with the side surface of the lower slide block 4j, so that the lower air cylinder 4l can drive the lower slide block 4j to move on the lower guide rail 4h, a gas collection mud guide cover which is small at the top and large at the bottom is arranged below a three-phase separator 4d, the gas collection mud guide cover comprises an upper ring body 4m, a lower ring body 4n and an elastic cloth 4o connected between the upper ring body 4m and the lower ring body 4n, wherein the upper ring body 4m consists of two semicircular ring bodies, and swing joint between two semi-ring bodies, lower ring body 4n constitute by two semi-ring bodies, and swing joint between two semi-ring bodies, the semi-ring body side of last ring body 4m all articulated be connected with upper connecting rod 4p, upper connecting rod 4 p's upper end and last slider 4i are articulated to be connected, lower ring body 4 n's semi-ring body side all articulated be connected with lower connecting rod 4q, lower connecting rod 4 q's upper end and lower slider 4j are articulated to be connected, last cylinder 4k, lower cylinder 4l be connected with gas collection mud guide cover controlling means electricity respectively.
Preferably, the upper ring 4m is composed of two semi-circular rings, and the two semi-circular rings are movably connected through a hinge or an elastic band.
Preferably, the lower ring body 4n is composed of two half-ring bodies, and the two half-ring bodies are movably connected through a hinge or an elastic band.
Preferably, the upper ring body 4m and the lower ring body 4n have the same shape, and are both circular or square.
Preferably, the two half-circular rings of the upper ring 4m are folded downwards when folded.
Preferably, the two half-circular rings of the lower ring body 4n are folded downwards when being folded.
Preferably, the exhaust pipe 4f is connected with a gas collecting device.
Preferably, the gas-collecting mud-guiding hood control device is a PLC controller.
Preferably, the biological contact oxidation reaction tank 6 comprises an oxidation reaction tank body 6a, a layered inclined plate 6b, an aeration pipe 6c, a packing frame 6d, a liquid discharging pipe 6e, a contact oxidation liquid inlet pipe 6f and a contact oxidation liquid discharging pipe 6g, wherein a plurality of layered inclined plates 6b are arranged in a staggered manner from top to bottom, the lower end of each layered inclined plate 6b is fixedly connected with the inner wall of the oxidation reaction tank body 6a, the higher end of each layered inclined plate is an overflow end, the aeration pipes 6c are respectively arranged on the layered inclined plates 6b, the packing frame 6d is obliquely arranged above the layered inclined plates 6b, biological fillers are arranged on the packing frame 6d, a flow baffle plate 6h is vertically arranged above the packing frame 6d, the flow baffle plate 6h is close to the lower end of the layered inclined plate 6b, a flow guide port is arranged between the lower end of the flow baffle plate 6h and the layered inclined plates 6b, the horizontal position of the upper end of the flow baffle plate 6h is higher than the horizontal position of the higher end of the layered inclined plates 6b, layering swash plate 6b be equipped with down the liquid mouth of a plurality of, lower liquid mouth bottom is equipped with down liquid pipe 6e, down liquid pipe 6e is equipped with the solenoid valve, contact oxidation feed liquor pipe 6f locate oxidation reaction tank body 6a top, contact oxidation feed liquor pipe 6f is connected with 5 play water ends of filtering ponds through the pipeline, contact oxidation fluid-discharge tube 6g locate oxidation reaction tank body 6a side lower part, contact oxidation fluid-discharge tube 6g is connected through pipeline and 7 ends of intaking of sedimentation tank.
Preferably, the device also comprises a circulating pipe 6i and a circulating pump 6j, wherein the lower end of the circulating pipe 6i is connected with the lower part of the side surface of the oxidation reaction tank body 6a, the upper end of the circulating pipe 6i is arranged at the top of the oxidation reaction tank body 6a, and the circulating pump 6j is arranged on the circulating pipe 6 i.
Preferably, the aeration pipe 6c is provided with a plurality of aeration holes.
Preferably, the lower liquid ports are sequentially arranged at equal intervals from the lower end to the higher end of the layered inclined plate 6 b.
Preferably, there are at least 4 layered inclined plates 6 b.
Preferably, the aeration pipe 6c is connected with an air compressor outside the oxidation reaction tank body 6a through an air pipe.
Preferably, the lateral surface of the oxidation reaction tank body 6a above the lower end of the layered inclined plate 6b is horizontally provided with a gas nozzle.
Preferably, the device comprises a methane desulfurization and dehydration recovery device, the methane desulfurization and dehydration recovery device comprises a shell 9a, an upper sliding rail 9b, a lower sliding rail 9c, a dehydration maintenance chamber 9d, a dehydration filler bracket 9e, a dehydration filler bracket driving device 9f, a desulfurization maintenance chamber 9g, a desulfurization filler bracket 9h and a desulfurization filler bracket driving device 9i, a methane distribution pipe 9j is arranged at the bottom of the shell 9a, the methane distribution pipe 9j is connected with an air inlet pipe 9k, the air inlet pipe 9k is connected with an exhaust pipe of the anaerobic reaction tank 4, an air outlet pipe 9l is arranged at the top of the shell 9a, the dehydration maintenance chambers 9d are respectively and oppositely arranged at the lower parts of the two sides of the shell 9a, dehydration filler bracket openings are arranged on the shell 9a opposite to the dehydration maintenance chambers 9d, and desulfurization maintenance chambers 9g are respectively and oppositely arranged at the upper parts of the two sides of the shell 9a, a casing 9a opposite to the desulfurization overhaul chamber 9g is provided with a desulfurization filler bracket opening, the lower slide rail 9c is arranged at the dehydration filler bracket opening, two ends of the lower slide rail 9c extend into the dehydration overhaul chamber 9d respectively, the upper slide rail 9b is arranged at the desulfurization filler bracket opening, two ends of the upper slide rail 9b extend into the desulfurization overhaul chamber 9g respectively, the lower part of the dehydration filler bracket 9e is in sliding fit with the lower slide rail 9c, two ends of the dehydration filler bracket 9e are provided with bracket opening seal plates 9m respectively, the dehydration filler bracket driving device 9f is arranged in the dehydration overhaul chamber 9d and can drive the dehydration filler bracket 9e to move on the lower slide rail 9c, two dehydration filler brackets 9e are arranged, the seal plates of the two dehydration filler brackets 9e are fixedly connected, one dehydration filler bracket 9e is arranged in the casing 9a, the other dehydration filler bracket 9e is arranged in the dehydration overhaul chamber 9d, desulfurization filler bracket 9 h's lower part and last slide rail 9b sliding fit, and desulfurization filler bracket 9h both ends are equipped with bracket mouth shrouding 9m respectively, desulfurization filler bracket drive arrangement 9i locate in desulfurization maintenance room 9g, and can drive desulfurization filler bracket 9h and move on last slide rail 9b, desulfurization filler bracket 9h have two, and concretion between two desulfurization filler bracket 9 h's the shrouding is connected, one of them desulfurization filler bracket 9h is located casing 9a, another desulfurization filler bracket 9h is located desulfurization maintenance room 9g, dehydration filler bracket 9e in be equipped with the dehydration filler, desulfurization filler bracket 9h in be equipped with the desulfurization filler.
Preferably, the dehydration filler bracket driving device 9f comprises a lead screw motor and a moving block sleeved on a lead screw of the lead screw motor, and the moving block is connected with the dehydration filler bracket 9 e.
Preferably, the desulfurization filler bracket driving device 9i comprises a lead screw motor and a moving block sleeved on a lead screw of the lead screw motor, and the moving block desulfurization filler bracket 9h is connected.
Preferably, still include humidity transducer 9n, first hydrogen sulfide gas body sensor 9o, overhaul reminiscences 9p, overhaul controller, humidity transducer 9n locate in last slide rail 9b and the casing 9a between the lower slide rail 9c, first hydrogen sulfide gas body sensor 9o locate the top in casing 9a, overhaul reminiscences 9p locate the dehydration respectively and overhaul room 9d, the desulfurization and overhaul the room 9g outside, overhaul controller respectively with humidity transducer 9n, first hydrogen sulfide gas body sensor 9o, overhaul reminiscences 9p, dehydration filler bracket drive arrangement 9f, desulfurization filler bracket drive arrangement 9i electricity is connected.
Preferably, the first hydrogen sulfide gas sensor 9o is close to the outlet pipe 9 l.
Preferably, the overhaul reminder 9p is an acousto-optic reminder, and the overhaul controller is a PLC controller.
Preferably, the device also comprises a second hydrogen sulfide gas sensor 9q, a hydrogen sulfide gas alarm 9r and an alarm controller, wherein the second hydrogen sulfide gas sensor 9q is respectively arranged in the dehydration overhaul chamber 9d and the desulfurization overhaul chamber 9g, the hydrogen sulfide gas alarm 9r is respectively arranged at the outer sides of the dehydration overhaul chamber 9d and the desulfurization overhaul chamber 9g, and the alarm controller is respectively electrically connected with the second hydrogen sulfide gas sensor 9q and the hydrogen sulfide gas alarm 9 r.
Preferably, the hydrogen sulfide gas alarm 9r is an audible and visual alarm, and the alarm controller is a PLC controller.
Preferably, the top of the dehydration overhaul chamber 9d and the top of the desulfurization overhaul chamber 9g are both provided with an overhaul sliding door and an exhaust valve.
Preferably, the air outlet pipe 9l is connected with an air storage tank.
Preferably, two ends of the upper sliding rail 9b are respectively provided with a limiting block.
Preferably, two ends of the lower slide rail 9c are respectively provided with a limiting block.
Preferably, the exhaust valve is connected with the gas collecting device through a pipeline.
Preferably, the suspension SS of the treated purified water in the clean water tank 8 is not less than 400mg/L, COD not less than 500mg/L, BOD not less than 350mg/L, and ammonia nitrogen NH3The value of-N is less than or equal to 45mg/L, pH and is 6.5-9.5.
Preferably, the SS of the suspended matters of the inlet water of the pretreatment water inlet pipe 1c is more than or equal to 2000g/L, COD and more than or equal to 5000mg/L, BOD and more than or equal to 2700mg/L, and the NH of ammonia nitrogen3The value of-N is more than or equal to 80mg/L, pH and is 4-6, and the water inflow rate is 2000m3/d。
The working principle and the working process of the system of the invention are as follows: sewage enters the water collecting well 1a from the pretreatment water inlet pipe 1c, is filtered by the filtering grid 1b of the first water collecting section, filter residues are accumulated on the filtering grid 1b, and the filtered sewage enters the primary sedimentation tank 2 from the pretreatment water outlet pipe 1d through other water collecting sections; when the filter grating 1b of the first water collection section needs to be cleaned, the corresponding driving mechanism 1g is started, the filter grating 1b is lifted to a cleaning platform, and then cleaning is carried out; during cleaning, the solid waste in the conveyed sewage is filtered by the filter grid 1b of the second water collecting section and is left on the filter grid 1 b; after the filtering grids 1b of the first water collecting section are cleaned, the first filtering grids 1b are lowered back to the first water collecting section to continue working; when the filter grids 1b of the second water collecting section need to be cleaned, the second filter grids 1b can be lifted to the cleaning platform by the corresponding driving mechanisms under the condition that the first filter grids 1b are not cleaned; when the first filter grid 1b returns to the first water collecting section after being cleaned, and the second filter grid 1b needs to be cleaned at the moment, the second filter grid 1b can be lifted to the top of the second water collecting section, and then the discharge pipe 1e of the first water collecting section is opened, so that the solid waste on the second filter grid 1b is flushed and discharged by the water flow through the discharge pipe 1e of the first water collecting section; the sewage discharged from the discharge pipe 1e can be circularly led into the pretreatment water inlet pipe 1c again; when the flow of the wastewater is large and the content of the solid waste is high, the filter grids 1b of the third water collecting section and the filter grids of the other water collecting sections can be brought into the working process according to the requirements, so that uninterrupted filtration is realized in the cleaning process;
adding sodium hydroxide into the sewage in a primary sedimentation tank 2, carrying out primary sedimentation, then pumping out upper-layer liquid and guiding the upper-layer liquid into an adjusting tank 3, adding a pH adjusting agent into the adjusting tank 3, and adjusting the pH value of the liquid to 6-8; then the liquid is sent into the anaerobic reaction tank body 4a through the anaerobic reaction water inlet pipe 4 c;
liquid is uniformly distributed at the bottom in the anaerobic reaction tank body 4a through the anaerobic reaction water distribution pipe 4b, digestion bubbles generated by the reaction of a sludge bed and sewage drive part of sludge and the treated sewage to pass through a suspension layer and be separated at the three-phase separator 4d, the liquid is discharged to the biological contact oxidation reaction tank through a drain pipe of the three-phase separator 4d, and the sludge falls back to the suspension layer; the digestion gas and the rest part of water are secondarily separated by a gas-liquid separator 4e, the liquid is discharged to a biological contact oxidation reaction tank from a drain pipe of the gas-liquid separator 4e, and the digestion gas is discharged to a biogas desulfurization and dehydration recovery device from an exhaust pipe 4 f; in the process of the sludge falling from the three-phase separator 4d, one part of the sludge falls on the elastic cloth 4o and is guided to two sides of the suspension layer by the elastic cloth 4o, the other part of the sludge falls in the upper ring body 4m, and the gas-collecting mud-guiding hood with the small upper part and the big lower part plays a role of gathering the digestion gas, so that the digestion gas is in opposite impact with the falling sludge through the upper ring body 4m, the sludge is pumped back, and the sludge is impacted to the periphery above the gas-collecting mud-guiding hood and falls from the periphery of the gas-collecting mud-guiding hood; the falling sludge is favorably and quickly dispersed, so that the reaction efficiency is improved; the operation is carried out for a period of time, and when the gas-collecting mud-guiding hood is not needed; the piston rods of the upper cylinder 4k and the lower cylinder 4l are controlled to extend through the gas-collecting mud-guiding cover control device, so that the upper slide 4i and the lower slide 4j move relatively, in the moving process, the upper connecting rod 4p pushes and enables the two semi-circular rings of the upper ring body 4m to be folded downwards, and the lower connecting rod 4q pushes and enables the two semi-circular rings of the lower ring body 4n to be folded downwards; namely, the upper ring body 4m and the lower ring body 4n are vertically folded, and the elastic cloth 4o is pulled to be vertically folded; the gas-collecting mud-guiding cover in a folded state does not influence the upstream digestion bubbles and simultaneously does not influence the falling of the sludge; further, the piston rod of the upper cylinder 4k can be controlled to continue to extend and the piston rod of the lower cylinder 4l can retract through the gas-collecting mud-guiding cover control device, namely, the upper slide 4i and the lower slide 4j move in the same direction, and the folded gas-collecting mud-guiding cover is moved to one side of the anaerobic reaction tank body 4 a;
the digestion gas discharged from the anaerobic reaction tank is uniformly distributed and ascends from the shell 9a through the gas distribution pipe 9j by the gas inlet pipe 9k, is dehydrated by the dehydrating filler, is desulfurized by the desulfurizing filler and is discharged and collected by the gas outlet pipe 9 l; after a period of operation, when the dehydration filler needs to be overhauled and replaced, the dehydration filler bracket driving device 9f is started, the dehydration filler bracket driving device 9f pushes the dehydration filler bracket 9e in an unused state in one dehydration overhaul chamber 9d, so that the dehydration filler bracket is pushed into the shell 9a from a dehydration filler bracket opening, the dehydration filler bracket needing to be overhauled and replaced is pushed into the other dehydration overhaul chamber 9d, and the bracket opening sealing plates on the two sides of the dehydration filler bracket 9e play a role in blocking and sealing the dehydration filler bracket opening; then, the worker can open the access sliding door corresponding to the dehydration access room 9d, and access and replace the used dehydration filler; according to the same method, under the action of the desulfurization filler bracket driving device 9i, the used desulfurization filler is pushed into the desulfurization overhaul chamber 9g, the unused desulfurization filler is pushed into the shell 9a, and then a worker can open an overhaul sliding door corresponding to the desulfurization overhaul chamber 9g to overhaul the used desulfurization filler and replace the dehydrating agent;
when the dehydrated filler or the desulfurized filler needs to be overhauled again next time, the dehydrated filler bracket driving device 9f or the desulfurized filler bracket driving device 9i is controlled to pull out the dehydrated filler bracket 9e and the desulfurized filler bracket 9h in the shell 9a to the corresponding dehydrated overhaul chamber 9d and the desulfurized overhaul chamber 9 g; the overhauled dehydration filler bracket 9e and the desulfuration filler bracket 9h are pulled into the shell 9a again; the online maintenance is realized by analogy in sequence;
the biogas desulfurization and dehydration recovery device can also realize automatic control through an overhaul controller, and particularly, when a humidity sensor 9n detects that the humidity exceeds a threshold value, namely the humidity is too high, the overhaul controller controls a dehydration filler bracket driving device 9f to start, so that unused dehydration fillers are pushed into a shell 9a, the used dehydration fillers enter a corresponding dehydration overhaul chamber 9d, the overhaul controller controls an overhaul reminder 9p on the side surface of the dehydration overhaul chamber 9d to give a reminder, and a worker can treat the dehydration overhaul chamber 9 d; similarly, when the first hydrogen sulfide gas sensor 9o detects that hydrogen sulfide in the biogas exceeds a threshold value, the overhaul controller controls the desulfurization filler bracket driving device 9i to work, the used desulfurization filler enters the corresponding desulfurization overhaul chamber 9g, the overhaul controller controls the overhaul reminder 9p on the side surface of the desulfurization overhaul chamber 9g to give a reminder, and a worker can treat the desulfurization overhaul chamber 9 g;
in the moving process of the dehydration filler bracket 9e and the desulfurization filler bracket 9h, when a small amount of methane with hydrogen sulfide enters the dehydration overhaul chamber 9d and the desulfurization overhaul chamber 9g, and when the second hydrogen sulfide gas alarm 9q detects that the hydrogen sulfide exceeds a threshold value, the hydrogen sulfide gas alarm 9r gives an alarm; when the maintenance sliding door is opened, a worker firstly guides out the methane through the exhaust valve and then carries out maintenance, so that the operation safety is guaranteed;
liquid discharged from a drain pipe of the anaerobic reaction tank is discharged into an oxidation reaction tank body 6a through a contact oxidation liquid inlet pipe 6f, then sewage falls on a layered inclined plate 6b on the uppermost layer and is gradually filled, an aeration pipe 6c rolls the sewage on the layered inclined plate 6b, and the sewage reacts with the biological filler; the redundant sewage flows out from the overflow end of the layered inclined plate 6b and falls to flow on the layered inclined plate 6b of the next layer to continue reaction, and in the falling process, the contact area of liquid and air is increased, so that the content of dissolved oxygen is increased, and the aeration power consumption is reduced; the subsequent sewage firstly falls on the lower end of the layered inclined plate 6b, flows through the flow baffle plate from the flow guide port for 6h and then flows to the overflow end, so that the effects of fully oxygenating the subsequent sewage and ensuring the contact reaction effect of the subsequent sewage and the biological filler are achieved; the treated sewage is discharged into a sedimentation tank 7 through a contact oxidation liquid discharge pipe 6 g; when the biological contact oxidation reaction tank works for a period of time, the electromagnetic valve is opened, so that the sewage on each layered inclined plate 6b falls through the liquid discharging pipe 6e, the flowing dead angle is prevented, the normal treatment of the equipment is ensured, and the electromagnetic valve is closed again after the liquid discharging pipe 6e works for a period of time; the electromagnetic valve of the uppermost layered inclined plate 6b can be intermittently opened according to the requirement, so that the falling amount of liquid is increased, the dissolved oxygen is further rapidly increased, and the aeration power consumption is reduced; the electromagnetic valves of a single layer and a plurality of layers from the uppermost layered inclined plate 6b can be opened for a long time, and the electromagnetic valves of the double layers are in a closed state, so that the reaction time and the reaction effect of the sewage and the biological filler are ensured while the dissolved oxygen is rapidly increased; the circulating pump 6j plays a role in continuously circulating the sewage in the oxidation reaction tank body 6a, so that the reaction effect is improved;
adding coagulant aid and flocculating agent into the liquid in a sedimentation tank 7 for flocculation and sedimentation; then discharging the supernatant liquid after standing and layering to a clean water tank 8; the purified water in the clean water tank 8 may be discharged to a municipal sewer network.
Taking out and combining sludge generated by the anaerobic reaction tank 4, sludge generated by the biological contact oxidation reaction tank 6 and flocculent precipitate generated by the sedimentation tank 7, concentrating by a sludge concentration tank, and performing pressure filtration by a pressure filter to obtain mud cakes, and transporting the mud cakes; and filtrate generated by the concentration of the sludge concentration tank and the filter pressing of the filter press is sent back to the regulating tank 3.
The process of the present invention is further illustrated below with reference to examples 1 to 4.
Example 1
The bean product sewage treatment method comprises the following steps: filtering bean product sewage by using a filtering grid, and transporting suspended solids and floating objects; taking filtered sewage, adding sodium hydroxide into the filtered sewage, and performing primary precipitation; taking the upper layer liquid, adding a pH regulator, and regulating the pH value to 6; then sending the liquid into an anaerobic reaction tank for reaction, and recovering the generated methane; after scum is filtered out from the reacted liquid, the reacted liquid is sent into a biological contact oxidation reaction tank for reaction; taking the liquid after reaction, adding coagulant aid and flocculating agent for flocculation and precipitation, standing for layering, and discharging the supernatant.
Example 2
The bean product sewage treatment method comprises the following steps: filtering bean product sewage by using a filtering grid, and transporting suspended solids and floating objects; taking filtered sewage, adding sodium hydroxide into the filtered sewage, and performing primary precipitation; taking the upper layer liquid, adding a pH regulator, and regulating the pH value to 8; then sending the liquid into an anaerobic reaction tank for reaction, and recovering the generated methane; after scum is filtered out from the reacted liquid, the reacted liquid is sent into a biological contact oxidation reaction tank for reaction; taking the liquid after reaction, adding coagulant aid and flocculating agent for flocculation and precipitation, standing for layering, and discharging the supernatant.
Example 3
The bean product sewage treatment method comprises the following steps: filtering bean product sewage by using a filtering grid, and transporting suspended solids and floating objects; taking filtered sewage, adding sodium hydroxide into the filtered sewage, and performing primary precipitation; taking the upper layer liquid, adding a pH regulator, and regulating the pH value to 7; then sending the liquid into an anaerobic reaction tank for reaction, and recovering the generated methane; after scum is filtered out from the reacted liquid, the reacted liquid is sent into a biological contact oxidation reaction tank for reaction; taking the liquid after reaction, adding coagulant aid and flocculating agent for flocculation and precipitation, standing for layering, and discharging the supernatant.
Example 4
The bean product sewage treatment method comprises the following steps: filtering bean product sewage by using a filtering grid, and transporting suspended solids and floating objects; taking filtered sewage, adding sodium hydroxide into the filtered sewage, and performing primary precipitation; taking the upper layer liquid, adding a pH regulator, and regulating the pH value to 7; then sending the liquid into an anaerobic reaction tank for reaction, and recovering the generated methane; after scum is filtered out from the reacted liquid, the reacted liquid is sent into a biological contact oxidation reaction tank for reaction; taking the liquid after reaction, adding coagulant aid and flocculating agent for flocculation and precipitation, standing for layering, and discharging the supernatant;
and (3) taking out and combining sludge generated in the anaerobic reaction tank, sludge generated in the biological contact oxidation reaction tank and the flocculent precipitate respectively, concentrating and carrying out filter pressing to obtain a mud cake, transporting the mud cake outwards, and sending the filtrate back to the stock solution in the pH value adjusting step.
Claims (9)
1. The bean product sewage treatment method is characterized by comprising the following steps: filtering bean product sewage by using a sewage pretreatment device (1), and transporting suspended solids and floating objects outside; taking filtered sewage, adding sodium hydroxide into the filtered sewage, and performing primary precipitation; taking the upper layer liquid, adding a pH regulator, and regulating the pH value to 6-8; then sending the liquid into an anaerobic reaction tank for reaction, and recovering the generated methane; after scum is filtered out from the reacted liquid, the reacted liquid is sent into a biological contact oxidation reaction tank for reaction; taking the liquid after reaction, adding coagulant aid and flocculating agent for flocculation and precipitation, standing for layering, and discharging the supernatant; the sewage pretreatment device (1) comprises a water collecting well (1 a) and a filtering grid (1 b) arranged in the water collecting well (1 a), wherein a pretreatment water inlet pipe (1 c) is arranged on the upper portion of the side surface of the water collecting well (1 a), a pretreatment water outlet pipe (1 d) is arranged at the bottom of the water collecting well (1 a), the water collecting well (1 a) comprises at least two water collecting sections from top to bottom, the diameters of the water collecting sections from top to bottom are gradually reduced, the lower portion of each water collecting section is inclined towards the center of the water collecting section, a discharge port is arranged on the inclined surface of each water collecting section and is connected with a discharge pipe (1 e), a gate valve is arranged on the discharge pipe (1 e), the filtering grid (1 b) is arranged in each water collecting section, a support (1 f) is arranged above the water collecting well (1 a), a plurality of driving mechanisms (1 g) are arranged on the support (1 f), and each driving mechanism (1 g) is correspondingly connected with one filtering grid (1 b), the driving mechanism (1 g) can drive the filtering grid (1 b) to move up and down in the water collecting section, and the pretreatment water outlet pipe (1 d) is connected with the water inlet end of the primary sedimentation tank (2) through a pipeline; sewage enters a water collecting well (1 a) from a pretreatment water inlet pipe (1 c), is filtered by a filtering grid (1 b) of a first water collecting section, filter residues are accumulated on the filtering grid (1 b), and the filtered sewage enters a primary sedimentation tank (2) from a pretreatment water outlet pipe (1 d) through other water collecting sections; when the filtering grating (1 b) of the first water collecting section needs to be cleaned, the corresponding driving mechanism (1 g) is started, the filtering grating (1 b) is lifted to a cleaning platform, and then cleaning is carried out; during cleaning, solid waste in the conveyed sewage is filtered by the filtering grid (1 b) of the second water collecting section and is left on the filtering grid (1 b); after the filtering grille (1 b) of the first water collecting section is cleaned, the first filtering grille (1 b) is lowered back to the first water collecting section to continue working; when the filter grating (1 b) of the second water collecting section needs to be cleaned, the second filter grating (1 b) can be lifted to a cleaning platform by a corresponding driving mechanism under the condition that the first filter grating (1 b) is not cleaned; when the first filter grid (1 b) returns to the first water collecting section after being cleaned, and the second filter grid (1 b) needs to be cleaned, the second filter grid (1 b) can be lifted to the top of the second water collecting section, and then the discharge pipe (1 e) of the first water collecting section is opened, so that the solid waste on the second filter grid (1 b) is flushed and discharged by the water flow through the discharge pipe (1 e) of the first water collecting section; the sewage discharged by the discharge pipe (1 e) can be circularly led into the pretreatment water inlet pipe (1 c) again; and when the waste water flow is large and the solid waste content is high, the filter grating (1 b) of the third water collecting section and the filter gratings of other water collecting sections can be brought into the working process according to the requirements, so that uninterrupted filtration is realized in the cleaning process.
2. The soybean wastewater treatment method according to claim 1, wherein the sludge produced by the anaerobic reaction tank, the sludge produced by the biological contact oxidation reaction tank, and the precipitate of the flocculation precipitation are respectively taken out and combined, and then subjected to concentration and pressure filtration to obtain a mud cake, the mud cake is transported outside, and the filtrate is returned to the stock solution in the pH value adjustment step.
3. The system for the bean product sewage treatment method according to any one of claims 1 to 2, which is characterized by comprising a sewage pretreatment device (1), a primary sedimentation tank (2), a regulating tank (3), an anaerobic reaction tank (4), a filtering tank (5), a biological contact oxidation reaction tank (6), a sedimentation tank (7) and a clean water tank (8) which are sequentially connected through pipelines.
4. The system for bean product sewage treatment according to claim 3, further comprising a sludge concentration tank and a filter press, wherein the sludge concentration tank is respectively connected with a sludge discharge end of the anaerobic reaction tank (4), a sludge discharge end of the biological contact oxidation reaction tank (6) and a residue discharge end of the sedimentation tank (7), the filter press is connected with a discharge end of the sludge concentration tank, a liquid discharge end of the sludge concentration tank is connected with the regulating tank (3) through a pipeline, and a liquid discharge end of the sedimentation tank (7) is connected with the regulating tank (3) through a pipeline.
5. The system for bean product sewage treatment method according to claim 3, wherein the anaerobic reaction tank (4) comprises an anaerobic reaction tank body (4 a), an anaerobic reaction water distribution pipe (4 b) is arranged at the bottom of the anaerobic reaction tank body (4 a), the anaerobic reaction water distribution pipe (4 b) is connected with an anaerobic reaction water inlet pipe (4 c), the anaerobic reaction water inlet pipe (4 c) is connected with the water outlet end of the regulating tank (3) through a pipeline, a three-phase separator (4 d) is arranged at the upper part of the anaerobic reaction tank body (4 a), a gas-liquid separator (4 e) is arranged above the three-phase separator (4 d), the region between the three-phase separator (4 d) and the bottom of the anaerobic reaction tank body (4 a) is a reaction zone, the lower part of the reaction zone is a sludge bed, the upper part of the reaction zone is a suspension layer, and the three-phase separator (4 d) is a reaction zone, The side of the gas-liquid separator (4 e) is provided with a drain pipe, the drain pipe is connected with the water inlet end of the filter tank (5) through a pipeline, the top of the gas-liquid separator (4 e) is provided with an exhaust pipe (4 f), the inner wall of the reaction tank body below the three-phase separator (4 d) is provided with an upper guide rail (4 g) and a lower guide rail (4 h), the upper guide rail (4 g) is provided with an upper slide block (4 i), the lower guide rail (4 h) is provided with a lower slide block (4 j), the two sides outside the anaerobic reaction tank body (4 a) are horizontally provided with an upper cylinder (4 k) and a lower cylinder (4 l), the piston rod of the upper cylinder (4 k) penetrates through the anaerobic reaction tank body (4 a) to be connected with the side of the upper slide block (4 i), so that the upper cylinder (4 k) can drive the upper slide block (4 i) to move on the upper guide rail (4 g), and the piston rod of the lower cylinder (4 l) penetrates through the anaerobic reaction tank body (4 a) to be connected with the side of the lower slide block (4 j), the lower cylinder (4 l) can drive the lower sliding block (4 j) to move on the lower guide rail (4 h), a gas collection mud guide cover with a small upper part and a big lower part is arranged below the three-phase separator (4 d), the gas collection mud guide cover comprises an upper ring body (4 m), a lower ring body (4 n) and an elastic cloth (4 o) connected between the upper ring body (4 m) and the lower ring body (4 n), the upper ring body (4 m) consists of two semi-circular ring bodies which are movably connected, the lower ring body (4 n) consists of two semi-circular ring bodies which are movably connected, the side surface of the semi-circular ring body of the upper ring body (4 m) is hinged with an upper connecting rod (4 q), the upper end of the upper connecting rod (4 q) is hinged with the upper sliding block (4 i), the side surface of the semi-circular ring body of the lower ring body (4 n) is hinged with a lower connecting rod (4 p), the upper end of the lower connecting rod (4 p) is hinged with the lower sliding block (4 j), and the upper cylinder (4 k) and the lower cylinder (4 l) are respectively and electrically connected with the gas collection mud guide cover control device.
6. The system for bean product sewage treatment method according to claim 5, wherein the upper ring body (4 m) is composed of two half ring bodies, and the two half ring bodies are movably connected through a hinge or an elastic band.
7. The system for bean product sewage treatment according to claim 5, wherein: the lower ring body (4 n) is composed of two semi-circular ring bodies which are movably connected through a hinge or an elastic band.
8. The system for bean product sewage treatment according to claim 3, wherein the biological contact oxidation reaction tank (6) comprises an oxidation reaction tank body (6 a), a plurality of layered inclined plates (6 b), an aeration pipe (6 c), a packing frame (6 d), a liquid discharging pipe (6 e), a contact oxidation liquid inlet pipe (6 f) and a contact oxidation liquid discharging pipe (6 g), the layered inclined plates (6 b) are arranged in a staggered manner from top to bottom, the lower end of each layered inclined plate (6 b) is fixedly connected with the inner wall of the oxidation reaction tank body (6 a), the upper end of each layered inclined plate is an overflow end, the aeration pipes (6 c) are respectively arranged on the layered inclined plates (6 b), the packing frame (6 d) is obliquely arranged above the layered inclined plates (6 b), the packing frame (6 d) is provided with biological packing, and a baffle (6 h) is vertically arranged above the packing frame (6 d), the flow baffle plate (6 h) is close to the lower end of the layered inclined plate (6 b), a flow guide port is formed between the lower end of the flow baffle plate (6 h) and the layered inclined plate (6 b), the horizontal position of the upper end of the flow baffle plate (6 h) is higher than the horizontal position of the higher end of the layered inclined plate (6 b), the layered inclined plate (6 b) is provided with a plurality of liquid discharging ports, the bottom of each liquid discharging port is provided with a liquid discharging pipe (6 e), each liquid discharging pipe (6 e) is provided with an electromagnetic valve, each contact oxidation liquid discharging pipe (6 f) is arranged at the top of the oxidation reaction tank body (6 a), each contact oxidation liquid discharging pipe (6 f) is connected with the water discharging end of the filtering tank (5) through a pipeline, each contact oxidation liquid discharging pipe (6 g) is arranged at the lower part of the side face of the oxidation reaction tank body (6 a), and each contact oxidation liquid discharging pipe (6 g) is connected with the water inlet end of the settling tank (7) through a pipeline.
9. The system for the bean product sewage treatment method according to claim 3 or 5, characterized by further comprising a biogas desulfurization and dehydration recovery device, wherein the biogas desulfurization and dehydration recovery device comprises a shell (9 a), an upper slide rail (9 b), a lower slide rail (9 c), a dehydration overhaul chamber (9 d), a dehydration filler bracket (9 e), a dehydration filler bracket driving device (9 f), a desulfurization overhaul chamber (9 g), a desulfurization filler bracket (9 h) and a desulfurization filler bracket driving device (9 i), the bottom of the shell (9 a) is provided with a biogas distribution pipe (9 j), the biogas distribution pipe (9 j) is connected with an air inlet pipe (9 k), the air inlet pipe (9 k) is connected with an exhaust pipe of the anaerobic reaction tank (4), the top of the shell (9 a) is provided with an air outlet pipe (9 l), the lower parts of two sides of the shell (9 a) are respectively and oppositely provided with a dehydration overhaul chamber (9 d), the dehydration overhaul chamber (9 d) is provided with a dehydration filler bracket opening on the opposite shell (9 a), the upper parts of the two sides of the shell (9 a) are respectively and oppositely provided with a desulfurization overhaul chamber (9 g), the opposite shell (9 a) of the desulfurization overhaul chamber (9 g) is provided with a desulfurization filler bracket opening, the lower sliding rail (9 c) is arranged on the dehydration filler bracket opening, the two ends of the lower sliding rail (9 c) respectively extend into the dehydration overhaul chamber (9 d), the upper sliding rail (9 b) is arranged on the desulfurization filler bracket opening, the two ends of the upper sliding rail (9 b) respectively extend into the desulfurization overhaul chamber (9 g), the lower part of the dehydration filler bracket (9 e) is in sliding fit with the lower sliding rail (9 c), the two ends of the dehydration filler bracket (9 e) are respectively provided with a bracket opening closing plate (9 m), the dehydration filler bracket driving device (9 f) is arranged in the dehydration overhaul chamber (9 d) and can drive the dehydration filler bracket (9 e) to move on the lower sliding rail (9 c), the desulfurization filler bracket driving device is characterized in that two dehydration filler brackets (9 e) are arranged, the sealing plates of the two dehydration filler brackets (9 e) are fixedly connected, one dehydration filler bracket (9 e) is positioned in the shell (9 a), the other dehydration filler bracket (9 e) is positioned in the dehydration overhaul chamber (9 d), the lower part of the desulfurization filler bracket (9 h) is in sliding fit with the upper sliding rail (9 b), the two ends of the desulfurization filler bracket (9 h) are respectively provided with a bracket opening sealing plate (9 m), the desulfurization filler bracket driving device (9 i) is arranged in the desulfurization overhaul chamber (9 g) and can drive the desulfurization filler bracket (9 h) to move on the upper sliding rail (9 b), the desulfurization filler brackets (9 h) are provided with two sealing plates, the sealing plates of the two desulfurization filler brackets (9 h) are fixedly connected, one desulfurization filler bracket (9 h) is positioned in the shell (9 a), the other desulfurization filler bracket (9 h) is positioned in a desulfurization overhaul room (9 g), the dehydration filler bracket (9 e) is internally provided with dehydration filler, and the desulfurization filler bracket (9 h) is internally provided with desulfurization filler.
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