118 results about "Air stripping" patented technology

The invention relates to the technical field of sludge treatment, and discloses a sludge treatment method based on sludge reduction and ammonia nitrogen recovery, which comprises the following steps: 1) alkali thermal hydrolysis: adding alkali into sludge to adjust the pH value to 9-11, and carrying out thermal hydrolysis reaction; (2) wet oxidation: heating after reaction and discharging, and carrying out wet oxidation reaction; (3) flash evaporation: carrying out heat recovery after reaction discharging, and carrying out flash evaporation to obtain a sludge mixed solution and flash evaporation steam; (4) dewatering: performing heat recovery on the sludge mixed solution, and then dewatering to obtain a sludge cake and filtrate; and (5) ammonia nitrogen air stripping: carrying out ammonia nitrogen air stripping on the filtrate by adopting steam, wherein the filtrate after air stripping can be reused as a carbon source for sewage treatment. According to the method, the oxidative degradation efficiency of the sludge is improved through coupling of alkali thermal hydrolysis and wet oxidation treatment, ammonia nitrogen recovery and sludge reduction are facilitated, and the filtrate has the characteristics of high COD and low total nitrogen and is more suitable for being used as a carbon source.

The invention discloses a method for removing nitrogen dioxide in dimethyl sulfoxide, and particularly relates to a method for removing nitrogen dioxide in a dimethyl sulfoxide crude product in the process of producing dimethyl sulfoxide from dimethyl sulfide, oxygen and nitrogen dioxide. A dimethyl sulfoxide crude product is introduced into the reactor, and the high-purity dimethyl sulfoxide can be separated and recovered from the crude product by circularly and repeatedly blowing off the dimethyl sulfoxide crude product in a closed device through nitrogen. The production method is suitable for a technology for producing dimethyl sulfoxide through nitrogen dioxide liquid phase oxidation, nitrogen dioxide in the crude product dimethyl sulfoxide is removed, the loss amount of nitrogen dioxide in the air stripping treatment process is greatly reduced, the operation process is easy and convenient to control, and the production method is suitable for modification and upgrading of an existing similar dimethyl sulfoxide production technology.

The present disclosure provides a vertical compact flotation unit with air stripping enhanced shallow sedimentation effect of spiral fins, and relates to the technical field of complicated treatment of oily waste water such as oil field polymer flooding produced water so as to give consideration to bubble utilization rate, operation energy consumption, structure compactness and installation and maintenance cost. The equipment includes a tank, an oil receiving structure, a swirling inner cylinder, a swirl breaking structure, sedimentation separation components and a center cylinder. An exhaust port is formed in the top of the tank, a slag discharge port is formed in the bottom of the tank, the side surface of the tank is provided with an oil spill port, a water outlet pipe and a water inlet pipe, and the water inlet pipe is tangentially connected with the swirling inner cylinder.

The invention relates to the technical field of wastewater treatment devices, and discloses a two-stage air stripping device suitable for high-concentration ammonia-containing wastewater treatment in the semiconductor industry. The air stripping mechanism is arranged on the ground and is used for carrying out air stripping treatment on the ammonia-nitrogen wastewater through a tower body in the air stripping mechanism; the filling mechanism is arranged on the tower body, and the filling mechanism is used for installing filler through a filling replacement hole and a fixing frame in the filling mechanism; according to the ammonia-nitrogen wastewater stripping tower, the stripping mechanism is arranged, wastewater is changed into tiny liquid beads through a spray head to be sprayed out to form a conical spray shape, the tiny liquid beads are sprayed to an internal filler plate and form water drops to flow to the tower bottom, and the treated wastewater flows out of a water outlet in the tower bottom and is pumped into a second tower body through a first ammonia-nitrogen wastewater stripping tower conveying pump to be circularly treated; through two-stage air stripping treatment, the device can adapt to higher ammonia-nitrogen inlet water concentration, and high-ammonia-nitrogen wastewater concentration in the semiconductor industry can be treated more efficiently.

The invention discloses a method for treating high-concentration ammonium fluoride wastewater in the electronic industry, which specifically comprises the following steps: firstly, carrying out induced crystallization fluorine resourceful treatment to remove fluoride in the wastewater; performing enzyme catalytic decomposition of hydrogen peroxide to remove hydrogen peroxide in the wastewater; and finally, carrying out integrated anaerobic ammonia oxidation treatment to remove ammonia nitrogen in the wastewater. According to the method disclosed by the invention, a combined process of induced crystallization fluorine recycling, enzyme catalysis hydrogen peroxide decomposition and integrated anaerobic ammonia oxidation is adopted, fluoride removal and fluorine recycling are synchronously realized through an induced crystallization process, and hydrogen peroxide is efficiently removed through an enzymatic reaction; high-efficiency treatment of high-ammonia-nitrogen wastewater is realized through a short-cut nitrification-anaerobic ammonia oxidation process under a low-energy-consumption condition, and the problems of high agent consumption, high sludge yield, high operation cost and low ammonia-nitrogen removal rate of a traditional ammonium fluoride wastewater treatment process (air stripping and chemical coagulation) are solved.

The invention discloses a method for removing bromine ions in a salt water body. The method comprises the steps of pretreatment before electrolytic oxidation, primary precise directional electrolysis, primary split-pole separated air real-time air stripping, secondary precise directional electrolysis, secondary split-pole separated air real-time air stripping, deep removal of bromine ions Br <-> by a reverse osmosis membrane, separation of bromine carrier airflow containing Br2 and the like. According to the method, the problems of environmental friendliness, economical efficiency, relatively good adaptability, directivity of a bromine ion Br <-> removal standard and how to deeply remove the bromine ion Br <-> in the prior art can be solved, and the Br <-> in the salt water body can be reduced to 10 ppm or below; the unit operation in the process path is basically conventional operation or universal operation, and has a good engineering feasibility foundation and an economic feasibility foundation.

The utility model discloses a graded depressurization and negative pressure stripping ozone reaction system, and belongs to the technical field of sewage treatment systems. The device comprises a first-stage catalytic oxidation tank, a second-stage ozone release tank and a third-stage negative pressure release and air stripping tank which are sequentially connected through pipelines, catalysts are arranged in the first-stage catalytic oxidation tank and the second-stage ozone release tank, and an aeration disc is arranged at the bottom of the third-stage negative pressure release and air stripping tank; and tail gas of the first-stage catalytic oxidation tank and the second-stage ozone release tank is controlled to be discharged by an electromagnetic valve, and enters an aeration disc in the third-stage negative pressure release and air stripping tank through a one-way valve. The tank body pressures of the first-stage catalytic oxidation tank, the second-stage ozone release tank and the third-stage negative pressure release and stripping tank are sequentially reduced. According to the utility model, ozone dissolved gas water releases ozone in batches in a graded pressure reduction manner, so that the ozone is efficiently utilized; air stripping is carried out under the negative pressure condition of the three-stage reaction tank, the denitrification effect is enhanced, front-end ozone tail gas is secondarily utilized, the ozone utilization rate is increased, and the COD removal effect is enhanced.

The utility model relates to the field of aquaculture, in particular to an aquaculture pond which comprises a pond body, a shrimp shell collecting frame is arranged on the side wall of the pond body, the shrimp shell collecting frame extends to the bottom of the pond through a shrimp shell conveying pipe, and the shrimp shell conveying pipe is connected with an air conveying pipe. When the aquaculture pond is used, the shrimp shell collecting frame is installed on the side wall of the pond body, air is introduced into the shrimp shell conveying pipe through the air conveying pipe, and shrimp shells are conveyed into the shrimp shell collecting frame from the end, extending to the pond bottom, of the shrimp shell conveying pipe in an air stripping mode to be collected. And when the gas stripping effect is insufficient, the gas stripping effect can be improved only by closing the aeration pipe in the tank body. The efficient gas stripping system is used for efficiently separating shrimp shells from the pond bottom in a gas stripping mode, the shrimp shell collecting effect is improved, it is guaranteed that a sewage draining exit at the pond bottom is not blocked by the shrimp shells, the burden of bottom sewage draining is reduced, and the function of an aquaculture system is improved.

The utility model discloses a hydraulic cyclone grit chamber for sewage treatment, which comprises a chamber body, the chamber body is provided with a water inlet and a water outlet, the water inlet is connected with a water inlet channel, the water outlet is connected with a water outlet channel, a sand collecting area is arranged in the chamber body, a grit setting area is connected above the sand collecting area, and the grit setting area is connected with the water inlet channel. A sand lifting pipe, an air flushing pipeline and an air lifting pipeline are arranged in the sand collecting area, and the sand lifting pipe upwards extends out of a top cover of the tank body and is connected with a sand discharging pipe; the air flushing pipeline and the air stripping pipeline are connected to a compressed air pipe in parallel; the water inlet channel is set to be at a preset gradient, so that the flow speed of sewage to be treated in the water inlet channel is increased, and the sewage enters the sand setting area along the tangential direction. Stirring equipment can be omitted, equipment maintenance is not needed, and the situation that operation of a sewage plant is affected due to the problem of the stirring equipment can be avoided; and energy is saved, consumption is reduced, carbon emission is reduced, and carbon neutralization of a sewage treatment plant is facilitated.

The utility model discloses a kind of activated carbon adsorption devices for sewage treatment, comprising: air stripping pump, carbon washer, water delivery pipe and water distributor. Air stripping pump includes air inlet pipe, air distribution pipe and lift pipe, the air distribution pipe is sleeved on the outside of the lift pipe, the air inlet pipe is connected with the air distribution pipe;Carbon washer includes backwash chamber and hole cover, the upper end of the lift pipe is located in the backwash chamber, the upper portion of the backwash chamber is equipped with carbon lifting port and exhaust port, lower portion is equipped with carbon discharge port and blowdown port, the hole cover is matched with the carbon lifting port;Water delivery pipe is sleeved on the outside of the air distribution pipe, water inlet pipe is connected on its outside;Water distributor is connected with the lower end of the water delivery pipe.One set of device completes activated carbon backwash and two kinds of operation of lifting, realizes activated carbon adsorption filter reuse function.

The utility model provides a drainage pipeline inverted siphon device capable of automatically dredging and discharging sludge. The drainage pipeline inverted siphon device comprises a water inlet well, a water outlet well, a water inlet well sludge hopper, a water outlet well sludge hopper, an inverted siphon pipe, a water inlet well lifting device, a water outlet well lifting device, an air compression device, a sludge discharging air pipe, an air flushing pipe, an inclined tee joint and a spray head. The top of the water inlet well sludge hopper is communicated with the top of the water outlet well sludge hopper through an inverted siphon. The device has the following advantages: 1, sludge deposited at the bottom of the sludge bucket is lifted to the ground by using an air stripping method and can be pulled away by a sewage suction truck; 2, sludge deposited at the bottom of the inverted siphon is flushed into a sludge hopper of a water outlet well through compressed air, and then the sludge is discharged out of the system through an air stripping method; 3, the same set of air compression device can be adopted as an air source for desilting and sludge discharging, and the energy-saving effect is achieved; the sludge monitor in the water outlet well is used for monitoring the sludge thickness, automatic dredging and sludge discharging are started according to a signal, time and labor are saved, and management is convenient.

The invention provides a novel freshwater fish factory recirculating aquaculture system, which comprises a culture pond, a vertical flow precipitator, a microfilter pond, a biochemical air floatation pond, a sand cylinder filter, a nano denitrification system and a multi-stage air stripping system, the culture pond is respectively connected with the vertical flow precipitator and the microfilter pond, the vertical flow precipitator is connected with the microfilter pond, the biochemical air floatation pond is connected with the sand cylinder filter, the nano denitrification system is connected with the biochemical air floatation pond, and the multi-stage air stripping system is connected with the sand cylinder filter. The biochemical air floatation tank is connected with the microfilter tank through a pipeline, the biochemical air floatation tank comprises an air floatation bin, a pump bin, a biochemical bin and a denitrification bin, and the pump bin is respectively connected with the sand cylinder filter, the nano denitrification system and the multi-stage air stripping system through pipelines; and circulating pumps are arranged on pipelines for connecting the pump bin with the sand cylinder filter, the nano denitrification system and the multi-stage air stripping system. According to the invention, the multi-stage cooperative treatment system is constructed and the denitrification system is introduced, so that the total nitrogen removal rate of the culture system is increased to 96%, which is increased by 140% compared with that of the traditional system, the water supplementing amount of the system is reduced, the daily water supplementing amount is reduced to less than 3%, and the water saving rate of the total amount of circulating water exceeds 70%.

The invention discloses a livestock and poultry manure hydrolysis deamination device which comprises a deamination tank body, a rotating shaft is arranged in the center of the interior of the deamination tank body, a plurality of rotating discs and paddle assemblies are fixedly mounted on the rotating shaft, and the rotating discs and the paddle assemblies are arranged at intervals; and a plurality of through holes are formed in the turntable. The paddle assembly comprises a plurality of paddles distributed in the circumferential direction of the rotating shaft at intervals, and the blade faces of the paddles are arranged to be in an arc shape. According to the ammonia nitrogen removal device, the rotating disc is arranged, raw materials below the liquid level can be brought to the position above the liquid level during rotation, the raw materials are stirred by the rotating disc and smeared and attached to the rotating disc, the contact area between the raw materials and gas is increased, the ammonia nitrogen removal efficiency of the raw materials is improved, and meanwhile through holes are formed so that circulation of air stripping gas in the ammonia removal tank body can be guaranteed.

A device for removing sulfur dioxide from refined acid relates to the technical field of sulfur dioxide removal and comprises a fan, a filter, a heater and a degassing tower which are sequentially connected in series through a gas inlet pipeline, the top of the degassing tower is connected with a gas outlet pipeline, a spray head, a filler layer and a gas blowing mechanism are sequentially arranged in the degassing tower from top to bottom, and the bottom of the degassing tower is connected with an acid outlet pipeline. The air inlet pipeline is communicated with the air blowing mechanism, and the spraying head is connected with an acid inlet pipeline. According to the utility model, the air heater is additionally arranged to heat the air, so that the air stripping efficiency is improved, and the indexes of reduzates in finished acid are ensured to be qualified and accord with the product quality requirements; the air blowing mechanism is novel and reasonable in structural design, the air blowing uniformity is effectively improved, and the air stripping quality is improved.

The application discloses a sewage collection system for dispersed emission sources 2 O processing linkage system and processing method, the linkage system comprises: sewage pretreatment and pipe network collection system, A 2 O processing system and discharge system. The application solves the sewage collection problem caused by complex terrain in the sewage collection range by adopting negative pressure collection technology, improves the sewage collection efficiency, creatively applies the air stripping technology, the Venturi technology and the siphon technology to the sewage process, and only needs a self-priming pump to realize the sewage collection and A 2 O process of sewage lifting, sludge and water backflow and oxygenation; the Venturi jet device directly performs jet aeration on the aerobic tower, reduces the dependence on high-energy consumption mechanical aeration blower, avoids resource waste and material loss; meanwhile, the water flow and dissolved oxygen distribution of the reaction tank are optimized, natural circulation is formed between the aerobic tower and the anoxic tower through the density difference, no additional power is needed, the energy consumption is reduced, the denitrification and phosphorus removal process is promoted, and the treatment efficiency is significantly improved.

The invention discloses a high-concentration ammonia-nitrogen wastewater recycling device and a recycling process, and belongs to the technical field of ammonia-nitrogen wastewater treatment.The upper cover is provided with a liquid inlet mechanism and a liquid outlet mechanism, and each hollow stirring plate is evenly provided with a plurality of first steam outlets; a cavity rod communicating with the annular cavity is arranged at the bottom of each first stirring plate, and a plurality of second steam outlets are evenly formed in each cavity rod. The pH value of ammonia-nitrogen wastewater in the inner cylinder is adjusted to 10-11, meanwhile, the ammonia-nitrogen wastewater in the inner cylinder is heated by the heating pipe at the heating temperature of 30-35 DEG C, ammonia nitrogen in the ammonia-nitrogen wastewater is removed for the first time by adopting an air stripping method, the ammonia-nitrogen wastewater in the inner cylinder is pumped into the outer cylinder, and ammonia nitrogen in the ammonia-nitrogen wastewater is removed for the second time by adopting the air stripping method. The high-concentration ammonia-nitrogen wastewater is treated in a two-stage stripping mode, recycling of ammonia nitrogen in a gas phase is facilitated, and the method has the advantages of being simple in technological operation and high in ammonia-nitrogen removal rate.

The utility model discloses a system for indoor continuous culture of gynura mongolica. The system comprises a culture container, an imitated natural light source, a temperature control device, a heat exchange tube, a culture water outlet, a physical filter device, a protein separator, a microorganism filter device and a PEM ozone device. A powerful filtering system and an air stripping system are utilized, the air stripping system can disturb a large amount of water, excrement of heavy euonymus mongolicus is filtered out at the first time, excrement sinking to the bottom cannot be generated, the aquaculture water is in a clean state, a powerful circulating water system is matched, ammonia nitrogen nitrite in the water is reduced, and the water quality is improved. And the treated high-quality purified water is conveyed back into the culture container, so that the purpose of recycling the culture water is achieved, the quality of the used culture water is good, the naked belly flea Mongolica can effectively grow in a comfortable environment, and the probability that the naked belly flea is completely killed due to insect falling and necrosis is greatly reduced.

The invention belongs to the technical field of soil and groundwater pollution remediation, and discloses a microbial enhanced vapor extraction remediation method for contaminated soil, which comprises the following steps: (1) injecting geobacillus stearothermophilus bacterial liquid into a soil contaminated area in situ; and (2) continuously extracting the waste gas from the soil polluted area, then purifying the extracted waste gas through catalytic combustion, and reinjecting the waste gas into the soil polluted area in situ. According to the contaminated soil remediation method, the extraction efficiency of organic pollutants can be remarkably improved and the discharge amount of waste gas can be greatly reduced by utilizing the heat and the air stripping effect of the reinjected waste gas; and the treatment efficiency is further improved by utilizing the enhanced migration effect and degradation effect of geobacillus stearothermophilus on organic pollutants.

The present invention relates to the field of wastewater treatment. To address the time-consuming issue of short-term nitrification treatment of high-ammonia nitrogen wastewater, a method for treating high-ammonia nitrogen wastewater is provided. The method comprises the following steps: the high-ammonia nitrogen wastewater enters an aeration tank through an air stripping device, where it fully contacts biological fillers and is separated into clear water and muddy water after sedimentation. The muddy water then re-enters the air stripping device after aeration to initiate a new cycle; the biological fillers are attached with ammonia-forming bacteria that decompose organic nitrogen into ammonia nitrogen. Utilizing the principle of short-term denitrification, the process has a stronger denitrification capacity than traditional multi-stage AO processes, achieving a denitrification efficiency exceeding 95%. In actual operation, the process can reduce oxygen supply by approximately 25%, reduce residual sludge discharge by approximately 50%, and lower operating costs.

The invention relates to a chemical high-nitrogen-content wastewater physical treatment device and process, the chemical high-nitrogen-content wastewater physical treatment device comprises a frame base, the frame base is provided with a gas stripping tank, a high-temperature steam maker, a compression cooler and a denitrification tower, the top of the gas stripping tank is provided with a water inlet, the bottom of the gas stripping tank is provided with a water outlet, and two adsorption catalysis plates are rotatably mounted in the denitrification tower; a driving box is mounted at the top of the high-temperature steam manufacturing machine, and the two ends of the driving box are in butt joint with an air outlet of the high-temperature steam manufacturing machine and the air stripping tank through guide pipes. Sewage subjected to physical treatment and chemical adsorption catalysis is discharged through the water outlet, the nitride content of the sewage is greatly reduced, the emission standard or the reusable water quality requirement is met, and in the whole treatment process, efficient and energy-saving wastewater treatment is achieved through driving of the high-temperature steam turbine and rotation of the adsorption catalysis plate.

The invention discloses a heavy metal emission reduction and sludge reduction treatment process method for circuit board wastewater. The invention provides a layered precipitation strategy of'first acid, second alkali and second sulfur '. The method comprises the following steps: performing acid precipitation on alkaline organic wastewater by using acidic wastewater, and recovering printing ink residues; carrying out air stripping treatment on the copper ammonia wastewater by utilizing an alkaline condition, and precipitating high-purity copper hydroxide; and finally, carrying out deep precipitation on residual complexing heavy metals by utilizing excessive sulfides in the pretreatment stage, and further recovering copper resources in the comprehensive water tank through coprecipitation of copper hydroxide and copper sulfide. Sludge generated in each process is classified and treated; printing ink slag, biochemical residual sludge and copper / nickel sulfide sludge are subjected to synergistic pyrogenic process treatment; copper hydroxide sludge is selectively subjected to acid dissolution to prepare copper sulfate. Lime, ferrous sulfate and polyaluminum are not used in the whole process. According to the method, the medicament is utilized to the maximum extent, the sludge is reduced by 50% or above, and the resource value of valuable metal is increased by 3-5 times.

The invention provides a wastewater treatment device and method for PVB (Polyvinyl Butyral) resin production. The wastewater treatment device comprises a tower body, and a liquid distributor, a filler layer and an aeration device are sequentially arranged in the tower body from top to bottom; the top of the tower body is provided with an air outlet, and the bottom of the tower body is provided with a water outlet; the liquid distributor is connected with a water inlet pipe; the aeration device is connected with an air inlet pipe; and a foam trapping device is arranged between the air outlet and the liquid distributor. Through the arrangement of the foam trapping device, total cross-section interception of rising foams, complete collection of fractured liquid, thorough separation of gas and liquid in space and reflux treatment of concentrated liquid can be realized; therefore, the problems of liquid accumulation, blockage, corrosion and the like of a gas-phase pipeline caused by foam escape when the PVB resin production wastewater is treated by the existing air stripping tower are effectively solved, and the technical problem that the pollutant removal efficiency is overestimated is effectively solved.

The present invention discloses an in-situ purification integrated device for VOCs in groundwater and an application method, which relates to the technical field of in-situ remediation of soil and groundwater. The device includes an in-situ air stripping-aeration-agent dosing integrated pneumatic pump, a groundwater extraction well, an agent dosing pipe, a ground agent dosing device, a pneumatic pump access pipe, a ground tail gas treatment device, a fan, and a vapor extraction device. By connecting the in-situ air stripping-aeration-agent dosing integrated pneumatic pump with the ground tail gas treatment device, the present invention realizes the recycling of tail gas within the system, reduces the high dependence on tail gas treatment processes, lowers the equipment operation, maintenance, and detection costs. The tail gas circulates within the system, avoiding direct emission of tail gas to the outside world, greatly reducing the potential pollution risk to the surrounding environment, realizing a more environmentally friendly groundwater purification process, and reducing the occurrence probability of environmental problems and related environmental incidents caused by tail gas emissions.

The invention discloses a filtering and recycling method and system for concentrated slurry of uranyl carbonate and ammonium diuranate in crystallization mother liquor, and relates to the technical field of uranium purification, the recycling method comprises the following steps: S1, adopting at least two solid-liquid separation devices which are arranged in parallel to carry out alternate circulating filtering treatment on tower bottoms of crystallization mother liquor containing uranyl carbonate and / or ammonium diuranate, filtering to obtain filtered clear liquid and an ammonia-containing filter cake; s2, carrying out air stripping treatment on the ammonia-containing filter cake obtained in S1 to separate ammonia-containing gas and obtain a solid material with low ammonia content; s3, carrying out absorption treatment on the ammonia-containing gas separated in S2 to obtain an ammonium-containing product; and S4, carrying out pyrolysis treatment on the solid material with low ammonia content obtained in S2 to obtain a uranium-containing product. Through cooperation of double-machine alternate circulating filtration, air stripping separation, absorption recovery and pyrolysis conversion, the technical problems of ammonia nitrogen pollution transfer, dependence on manual operation, long flow and high water content of a filter cake are solved.

The utility model discloses a lifting type circulating flow facultative anaerobic bioreactor which comprises a reactor body, a central cylinder is arranged in the center of the reactor body, a central cylinder cover is arranged at the top of the central cylinder, a space for water to pass through is formed by the central cylinder cover and the top of the central cylinder, and a water inlet pipe is arranged on the side portion of the reactor body and extends into the central cylinder. A group of return pipes are arranged on the outer surface of the central cylinder along the circumferential direction of the central cylinder, the return pipes are communicated with the central cylinder, a gas stripping pipe is arranged at the top of the reactor body, the gas stripping pipe penetrates through a central cylinder cover and extends into the central cylinder, and the gas stripping pipe is arranged at the top of the reactor body, penetrates through the central cylinder cover and extends into the central cylinder. Sewage forms an up-and-down circulating flow state in the reactor under the action of gas stripping, and sludge is in a suspended state under the disturbance of the sewage in the circulating flow state, so that full contact between hydrolytic acidification zoogloea and water is ensured, and local short flow and sludge aggregation are prevented.

The present invention discloses a highly efficient denitrification SBBR sewage treatment device, belonging to the field of sewage treatment technology. It solves the problem that sewage in existing SBBR reaction tanks cannot circulate to generate endogenous denitrification reactions. The device comprises an SBBR reaction tank connected to a sewage assembly. The SBBR reaction tank comprises a reaction tank body, a baffle provided in the middle of the reaction tank body, and a plurality of biological filler racks evenly distributed on both sides of the baffle installed in the reaction tank body. Each biological filler rack is provided with an aeration disk at the bottom, and an air stripping assembly is installed on the side of the baffle near the reaction tank body. The present invention utilizes a portion of the air volume of the aeration fan, without increasing energy consumption or adding a carbon source, and utilizes the air stripping assembly and baffle to fully contact pollutants in the water with microorganisms attached to the biological filler racks. This device utilizes endogenous denitrification to efficiently remove nitrogen, thereby ensuring that the total nitrogen content of the effluent meets the standard by stably adding no or only a small amount of carbon source.

The invention provides an efficient regeneration molecular sieve drying, adsorption and filtration device, which belongs to the technical field of gas drying, adsorption and filtration and comprises a shell, a gas inlet pipe arranged at the top and an exhaust assembly arranged at the lower part of the side surface. A grading filtering module, a self-adaptive adsorption module, a pressing plate module, an airflow uniform distribution plate and an intelligent regeneration module are sequentially mounted in the shell. The graded filtering module is used for multi-stage filtering; the self-adaptive adsorption module realizes adsorption through a bearing table and a molecular sieve packaging assembly; the pressing plate module elastically fixes the molecular sieve and switches a communication state during adsorption and regeneration; the intelligent regeneration module is integrated with a hot air stripping assembly and a pulse back blowing assembly to synergistically realize efficient regeneration; and regenerated tail gas is discharged from the side wall discharge pipe. Through graded filtering protection, elastic fixing of pressing plate module integration and gas path self-switching, uniform distribution optimization of gas flow and cooperative regeneration of hot air stripping and pulse back blowing, efficient purification, thorough regeneration, structure simplification and long-period stable operation of the molecular sieve drying adsorption device are achieved.

The utility model is applicable to the technical field of sewage treatment equipment, and particularly relates to a clean gas stripping water production device for an SBR (sequencing batch reactor) process, which comprises a sewage pool, a U-shaped pipe is arranged in the sewage pool, one end of the U-shaped pipe is connected with a first drainage pipe, and the other end of the U-shaped pipe is connected with a second drainage pipe; the outer side of the first drainage pipe is connected with an air injection pipe, and the end, away from the first drainage pipe, of the air injection pipe is connected with a first ventilation hose. According to the utility model, sludge and other suspended matters can be effectively prevented from entering a drainage system in aeration and stirring processes, and the turbid phenomenon at the initial stage of water production is avoided. Meanwhile, the air weir is arranged to form a gas isolation area in a sewage treatment stage, so that the dirt is prevented from entering a water production pipeline, and the purity of the supernate during drainage is ensured. By means of the design, the discharging efficiency of supernate is greatly improved, cleanliness of a water production pipeline is guaranteed, and then the water outlet quality is improved.

The utility model discloses nitric acid pickling copper wastewater total nitrogen removal equipment which comprises an air stripping tower main body and an exhaust chimney, and the exhaust chimney is fixedly mounted at the top of the air stripping tower main body; the efficient removal assembly comprises a PH adjusting heating tank, a header pipe, a spraying circulating pipe, a drainage pipe, a first filler layer, a second filler layer and a centrifugal fan, the PH adjusting heating tank is arranged at the side part of the air stripping tower main body, the header pipe is arranged at the top of the PH adjusting heating tank, the header pipe is connected with the spraying circulating pipe in a grading manner, and the drainage pipe is connected with the spraying circulating pipe. A drainage pipe is fixedly inserted into the bottom of the spraying circulating pipe, a first filler layer and a second filler layer are fixedly mounted in the air stripping tower main body, and the side part of the air stripping tower main body is fixedly connected with an air outlet end of a centrifugal fan. According to the device disclosed by the utility model, free ammonia dissolved in wastewater can pass through a gas-liquid interface and is transferred to a gas phase, so that the aim of deeply removing ammonia nitrogen and total nitrogen is fulfilled.

The utility model relates to the technical field of sewage treatment equipment, in particular to a co-construction micro-ecological filter bed device for rural areas, which comprises a regulating reservoir and a contact oxidation pond, a grating channel is arranged at the front end of the regulating reservoir, an artificial grating is mounted in the grating channel, the grating channel is communicated with the regulating reservoir, an equipment room is arranged at the front end of the contact oxidation pond, and the equipment room is communicated with the contact oxidation pond. A fan is mounted in the equipment room, the output end of the fan is connected with an air pipe, the air pipe is connected with an air stripping device through a regulating tank, the output end of the air stripping device is connected with a plurality of groups of aeration discs, the aeration discs are mounted in a contact oxidation pond, a contact oxidation pond water outlet pipe is mounted at the left end of the contact oxidation pond, and a water outlet pipe is mounted at the right end of the contact oxidation pond. Due to the integration of the adjusting tank, the biochemical system and the micro-ecological filter bed, the occupied area of the sewage station is reduced, the excavation work amount of civil construction is reduced, the development of construction procedures is facilitated, and the total construction time is shortened.