46results about How to "Stable water" patented technology

The invention discloses a photovoltaic wastewater lime-process crystallization treatment process and a treatment system used by the same, which are characterized in that acid fluoride wastewater and alkali washing wastewater generated in a photovoltaic sheet production process are respectively collected by an acid fluoride wastewater collecting pool and an alkali washing wastewater collecting pool; the acid fluoride wastewater and a lime agent are subjected to a crystallization reaction in a crystallization fluidized bed to obtain calcium fluoride crystals, effluent of the crystallization fluidized bed and alkali washing wastewater are mixed in a secondary defluorination unit, and calcium chloride is added for a defluorination reaction after the pH value is adjusted; the effluent of the second-stage fluorine removal unit reacts with a fluorine removal agent or polyaluminum chloride in the third-stage fluorine removal unit to remove fluorine again, polyacrylamide is added into the third-stage fluorine removal unit to perform a flocculation reaction, and finally, the fluorine ion concentration in the effluent of the third-stage fluorine removal unit meets the discharge requirement. The agent input cost and the sludge treatment cost are reduced, the secondary pollution of chloride ions is avoided, and the effluent is ensured to stably reach the standard.

The invention relates to the technical field of water dispensers, and discloses a cold boiled water dispenser, a constant temperature control method and a high temperature sterilization method.The cold boiled water dispenser comprises a heating water tank, a heat exchange module, a control module and a first water inlet valve, and a heating inlet, a boiled water outlet and an exhaust port are formed in the heating water tank; two ends of the first water inlet valve are respectively communicated with an external water source and the heating inlet; the boiled water outlet is connected with a boiled water control valve; the water heater is characterized by further comprising a second water inlet valve and a constant-temperature water tank, a first high-water-level electrode, a first low-water-level electrode, a first electric heating tube and a first temperature probe are arranged in the constant-temperature water tank, a cold water inlet and a constant-temperature outlet are formed in the constant-temperature water tank, and a cold water inlet and a cold water outlet are formed in the heat exchange module. Two ends of the second water inlet valve are respectively communicated with an external water source and the cold water inlet, the cold boiled water outlet is communicated with the cold boiled water inlet, and the constant-temperature outlet is connected with a cold boiled water control valve; the cold boiled water dispenser has a constant-temperature water outlet effect and a high-temperature sterilization effect.

The invention relates to the technical field of resources and environments, and discloses an intelligent sewage and agriculture complementary device and a control method thereof.The device comprises an adjusting tank and a shell; a sewage moderate treatment module, a resource utilization module, a clean water tank and a digital intelligent control module are arranged in the shell; the sewage moderate treatment module comprises a water inlet main pipe, a membrane processor group and a water storage tank; the membrane treatment unit comprises a supporting structure, structured packing and a water distribution unit; the resource utilization module comprises a functional pool, a water distribution unit and a three-dimensional hydroponic bed unit; the digital intelligent control module comprises an adjusting tank sewage data acquisition unit and an analysis control unit; the analysis control unit is used for analyzing the sewage data of the regulating reservoir and the structured packing state, and controlling the secondary treatment degree of the sewage moderate treatment module on the domestic sewage; the domestic sewage subjected to secondary treatment is subjected to resource utilization through the three-dimensional hydroponic bed, so that the domestic sewage reaches the discharge standard.

The invention relates to a non-ferrous smelting waste acid wastewater vulcanization reaction device, and belongs to the field of non-ferrous smelting waste acid wastewater treatment. The device comprises a reaction tank main body, and a circulating tank, a flow baffle, a medicament adding system and a stirring device which are arranged in the reaction tank main body, the recycling device is arranged at the upper part of the reaction tank main body; the wastewater inlet system and the liquid outlet pipe are arranged outside the reaction tank main body; the wastewater inlet system is divided into two paths, the first path is communicated with the reaction tank main body, the second path is communicated with the top of the recycling device, and wastewater is used as spraying liquid to be distributed in the recycling device; the liquid outlet pipe is communicated with the upper part of the circulating groove; and an outlet of the recycling device is connected with a pipeline of the deinsectization tower. Compared with the prior art, the device is compact in structure, a traditional vulcanization reaction device is improved, the vulcanization efficiency is improved, the dosage of chemicals is reduced, and good environmental protection and economic benefits are achieved.

The invention provides a preparation method of a granular manganese lithium ion adsorbent, and belongs to the technical field of lithium extraction adsorbents, the preparation method comprises the following steps: dissolving a lithium salt and a manganese salt in water together to obtain a lithium-manganese solution, and adding a carrier molecular sieve into the lithium-manganese solution to obtain a mixed solution; adding a precipitant and a complexing agent into the mixed solution, and stirring to react for a certain time to obtain a reaction solution; aging the reaction liquid, then carrying out solid-liquid separation, and drying the obtained precipitate to obtain a coprecipitation carrier; and carrying out high-temperature roasting on the coprecipitation carrier to obtain the manganese-based lithium ion adsorbent. The lithium ion adsorbent prepared by the method is granular and high in flowability, solves the problem of poor flowability of a powdery adsorbent in industrial application, and has excellent stability and adsorption capacity. The invention also provides the granular manganese lithium ion adsorbent.

The utility model belongs to the technical field of faucets, and particularly relates to a faucet capable of discharging water stably, a partition plate is arranged in a faucet body and divides the interior of the faucet body into a first water outlet channel and a second water outlet channel, and a through hole communicated with the first water outlet channel and the second water outlet channel is formed in the partition plate. A connecting hole is formed in the top of the faucet body, a locking hole communicated with the first water outlet channel is formed in the bottom of the faucet body, a first water outlet communicated with the second water outlet channel is formed in the bottom of the faucet body, the through hole, the connecting hole and the locking hole are arranged on the same axis from top to bottom, and an adjusting assembly is arranged on the connecting hole. The adjusting assembly can select different water outlet channels to adjust water outlet according to actual requirements, adjustment is easy, convenient and labor-saving, the problem of unstable water flow caused by factors such as water pressure fluctuation is effectively solved, and stable water outlet is achieved.

The invention discloses a sewage treatment project investment estimation method and system. The method comprises the following steps: formulating a sewage treatment process flow; detecting a water treatment flow pipeline; sewage treatment informatization monitoring management; performing influence judgment according to the monitoring data information; the main body of the water treatment equipment is in full-automatic intelligent operation, unattended operation and real-time interaction with a management informatization platform, real-time online monitoring can be realized, the process can be automatically adjusted, stable and standard effluent is ensured, and monitoring, remote control, fault diagnosis and instant message pushing of the working state of the equipment, effluent SS and turbidity are remotely realized; the system has the same functions as a matched mobile phone APP, embodies the advancement of a sewage treatment process technology, adopts mature new technologies and new materials, and is high in system integration level, high in automation level and self-diagnosis capability, stable in effluent quality, high in operation efficiency of the treatment process and capable of reducing the influence on the environment to the greatest extent.

The utility model discloses efficient precipitation integrated equipment for treating industrial wastewater. The efficient precipitation integrated equipment comprises a coagulation zone, a flocculation zone, a transition zone, a precipitation zone, a water outlet device and a sludge discharge system, a water inlet pipe is arranged at the upper part of the coagulation area and is connected with a coagulation dosing pipe; a central cylinder is arranged in the middle of the flocculation area, a flocculation dosing pipe is arranged at the top of the central cylinder, the bottom of the coagulation area is communicated with the bottom of the central cylinder, the top of the central cylinder is communicated with the flocculation area, the bottom of the flocculation area is communicated with the bottom of the transition area, the transition area is separated from the sedimentation area through a baffle, and the sedimentation area is communicated with the bottom of the coagulation area. The top of the baffle is provided with a notch communicating the transition area and the settling area. The efficient precipitation integrated equipment for treating industrial wastewater has the advantages of small occupied area, high treatment efficiency, good effect, small dosage and stable operation.

The invention provides a degradation-resistant wastewater treatment system, which comprises: a chemical oxidation system, which comprises an acid adjusting tank, an electro-Fenton reaction tank, an alkali adding neutralization tank and a solid-liquid separation tank which are sequentially connected along a water flow direction; and the biochemical system comprises a denitration selection tank, an anaerobic tank, an anoxic tank, at least one aerobic tank and an eMBR membrane tank which are sequentially connected along the water flow direction. Compared with the prior art, the non-degradable wastewater treatment system has the advantages that the denitration selection tank is additionally arranged at the front end of the anaerobic tank, nitrite nitrogen returned by sludge is removed by using a raw water carbon source, the influence on the growth of phosphorus-accumulating bacteria is reduced, the phosphorus removal effect is improved, an anaerobic ammonia oxidation generation environment is created, and the denitrification effect of the system is enhanced.

The invention relates to the field of reclaimed water treatment, in particular to a method for stable operation of an active coke adsorption tank in a reclaimed water treatment system. According to the method disclosed by the invention, the active coke adsorption tank is detected in real time, cleaned regularly and cleaned and replaced in time, and the treatment effect of the active coke adsorption tank can be effectively ensured in the operation process of the active coke adsorption tank, so that the effluent quality is ensured; specifically, the UV value of water in the activated coke adsorption tank is detected through an ultraviolet spectrum detector, the activated coke adsorption tank is correspondingly treated according to the detection result, such as regular cleaning, discharge of effluent to a buffer tank, timely and quantitative cleaning or replacement of activated coke and the like, and meanwhile, the opportunity of effluent after replacement of the activated coke can be determined. The stable and efficient operation of the active coke adsorption tank is realized, and the active coke adsorption tank plays a positive and beneficial role in reducing the plant occupied area of the active coke adsorption tank.

The present invention relates to a high-sensitivity large-flow water flow sensor in the technical field of water heaters, wherein an empty shell is divided into four chambers by a longitudinal partition and a transverse partition, a first flow hole and a second flow hole are provided on the longitudinal partition, a third flow hole and a fourth flow hole are provided on the transverse partition, the first water chamber is connected to the second water chamber via the first flow hole, the transverse partition is located between the first flow hole and the second flow hole; the third water chamber is connected to the first water chamber via the third flow hole, the third water chamber is connected to the fourth water chamber via the second flow hole, the fourth water chamber is connected to the second water chamber via the fourth flow hole, a water flow baffle is provided in the second water chamber to block the first flow hole, a magnet is provided on the water flow baffle, a magnetic induction element corresponding to the magnet is provided in the shell wall; a spring and a valve core are provided in the fourth water chamber, and the valve core abuts against the mouth of the second flow hole via the spring. The sensor has high sensitivity and large flow rate and can be used in various water heaters.

The utility model discloses a water outlet structure of a Fenton oxidation tower, which comprises a water outlet groove, the water outlet groove is arranged at the top of the inner wall of a tower body, a water inlet hole is arranged on one side surface of the water outlet groove, a lower baffle and an upper movable baffle are arranged in the water outlet groove, and the lower baffle, the upper movable baffle and the water outlet groove form a water outlet space. Water treated through the Fenton oxidation reaction enters water outlet spaces on the two sides of the water outlet tank through water inlet holes and then flows out through a water outlet formed in the tank bottom and a long water outlet pipe in the vertical direction, and a movable cover plate covering the whole water outlet tank is arranged above the water outlet tank. The water outlet speed can be controlled, water outlet is smooth, the structure is simple, and practicability is high.

This invention discloses an intelligent control method and system for industrial systems based on a large AI model, relating to the field of industrial system control technology. It establishes a dual-condition collaborative control architecture for a water treatment system, completes the deployment of the underlying framework of the control logic, identifies operating condition types based on preset multi-dimensional condition judgment conditions, and triggers bidirectional switching between normal stable conditions and rare small-sample conditions. It calls a pre-trained normal-condition AI control model, generates regular operating control commands based on real-time collected operating parameters, and sends them to the actuators to adjust the water treatment system for stable operation. It initiates a small-sample adaptive learning process to generate an adaptive inference model adapted to the current rare conditions, simultaneously completing the transition and control of the dual-condition switching process. It also sets up a comprehensive prevention and long-term optimization mechanism for the entire condition switching process. This invention achieves cost optimization throughout the entire lifecycle of the water treatment system through precise adaptive adjustment under rare conditions.

The application provides a variable liquid level periodical uniform outflow device, which comprises an outflow pipe, a guide rail, a magnetic valve and a floating body trigger cylinder; the floating body trigger cylinder sequentially contacts and pushes the magnetic valve at the corresponding position downward with the decrease of the liquid level, thereby opening the cross flow pipe at the corresponding position and canceling the pushing force on the magnetic valve at the upper position to reset it, so that the water tank outlet realizes periodical uniform outflow of water with stable drainage and periodical equal flow drainage while the liquid level continuously decreases; the floating body trigger cylinder sequentially contacts and pushes the magnetic valve at the corresponding position downward with the decrease of the liquid level, thereby opening the cross flow pipe at the corresponding position to realize periodical uniform outflow of water, without the need of additional external power source, stable power supply, effectively reducing power cost and maintenance cost; the device can realize periodical uniform outflow of water, has wide application range, realizes uniform and stable outflow of water, and avoids unintended influence caused by continuous outflow of water.

The utility model discloses a water vapor separation box of direct drinking water equipment, including box body, water inlet and water outlet, the center line of water inlet and the center line of water outlet are one angle of clamping, still be equipped with first exhaust passage and second exhaust passage on the box body, and the third exhaust passage is formed between water outlet and the lower part of box body, through the center line of water inlet and the center line of water outlet are the angle of clamping setting, can avoid the hot water straight down to the fluctuation interference of water, utilize the buffer of side wall and make the water flow more gentle, in addition, through setting three exhaust passages on the box body, when heating does not flow out, the steam is excluded through the first exhaust passage export, and the steam produced in the hot water flow -out process can drink the third exhaust passage export through the second exhaust passage, like this can reduce the water deflection and the phenomenon of mixed gas bubble in water when water, improve the water temperature of hot water simultaneously, can make the user when using 95 DEG C above hot water, and the water is also more stable.

The present invention discloses a low-energy consumption, low-carbon source addition high-ammonia nitrogen wastewater treatment process and system, the process includes the following steps: S1, pretreatment stage; high-concentration ammonia nitrogen wastewater is first subjected to denitrification and short-range denitrification reaction; S2, main reaction stage; wastewater undergoes short-range nitrification reaction, anaerobic ammonia oxidation reaction, short-range denitrification reaction and organic matter degradation; S3, stable effluent stage; the remaining ammonia nitrogen and nitrite nitrogen in the wastewater are oxidized into nitrate nitrogen, and polyphosphate bacteria are used to perform aerobic phosphorus absorption reaction. The process of the present invention adopts multi-stage process combination, precise control, high solid load solid-liquid separation and concentration technology, high-rate pneumatic lifting internal and external reflux circulation technology to not only integrate the advantages of traditional A2 / O, SBR, oxidation ditch and MBR, but also has the synchronous short-range nitrification and denitrification, short-range denitrification, and anaerobic ammonia oxidation functions that are difficult to achieve in these processes, and has the advantages of strong resistance to shock loads, low operating costs, and small footprint.

This invention discloses a method for dynamic detection of flocculation state in wastewater, belonging to the field of intelligent monitoring in wastewater treatment. The method includes the following steps: S1, constructing a time-series raw dataset and completing source data calibration; S2, image denoising, enhancement, and standardization, as well as dynamic floc target segmentation and morphological optimization, outputting segmented floc images; S3, extracting geometric features while fusing water quality physicochemical features, three-dimensional fluorescence features, and electrodynamic features to form a multi-dimensional feature dataset; S4, constructing a comprehensive evaluation index for flocculation state that integrates geometric, water quality physicochemical, three-dimensional fluorescence, and electrodynamic features; S5, constructing an LSTM-SVM hybrid prediction model to output the predicted results of the comprehensive evaluation index for flocculation state and post-sedimentation turbidity for future periods. Using this method for dynamic detection of flocculation state in wastewater, high-precision real-time detection of flocculation state is achieved, significantly improving the operational stability of the solid-liquid separation process.

The present application relates to sewage treatment technical field, disclose a kind of membrane aeration biological membrane reactor's operating method and operating device, sewage treatment system.The operating method has at least one control cycle during the continuous operation of reactor, the cycle includes: pre-control step, provide negative pressure pulse to membrane assembly inside, the normal compressive stress directed to membrane silk inside is applied to the biological membrane attached to the outer surface of membrane, so that the microstrain of outer layer structure is generated;Fluidized cutting step, add and fluidize circulating cutting microparticles to reactor, and microparticles are rolled cutting to the surface of biological membrane under the driving of fluid.By the cutting action of cutting microparticle and negative pressure pulse, the outer layer of biological membrane is selectively stripped from invalid biomass.The present application realizes the fine control from inside to outside to biological membrane under the condition of not interrupting sewage treatment process, can long-term maintain biological membrane in thin, high-activity ideal mass transfer state, effectively solve the problem that mass transfer efficiency attenuates with operating time.

The water inlet assembly comprises a water inlet fixing frame arranged on the outer side wall of a pond body and a water inlet connecting pipe arranged on the water inlet fixing frame, the first end of the water inlet connecting pipe is connected with an external water tank, the second end of the water inlet connecting pipe is connected with a water inlet pipe, and the water inlet pipe extends into the pond body. The water inlet pipe comprises a water inlet inner pipe with the top connected with the water inlet connecting pipe and a water inlet outer pipe arranged outside the water inlet inner pipe in a sleeving mode, a gap is formed between the water inlet outer pipe and the water inlet inner pipe, the bottom of the water inlet outer pipe is blocked, the top of the water inlet outer pipe and the water inlet inner pipe are blocked, and a plurality of first water inlet holes are formed in the water inlet inner pipe. And a plurality of second water inlet holes are formed in the water inlet outer pipe. A water inlet structure with nested inner and outer pipes is adopted, water flow enters the water inlet outer pipe through the water inlet inner pipe and then enters the pond body through the water inlet outer pipe, the water inlet flow speed of each second water inlet hole in the water inlet outer pipe is the same, water outlet is stable, overall uniform water supply is achieved, and the requirement for the growth environment of fry is met.

The invention discloses a micro-electrolysis biological filter system and method for rapidly purifying surface water. The micro-electrolysis biological filter system comprises a porous filter plate, a modified porous reticular filler, a light filter material, an upper filter plate, an aeration device and a backwashing device. According to the micro-electrolysis biological filter, through the combination mode of the modified iron-based porous net-shaped filler and the light filter material, the starting time of a system can be effectively shortened, the removal efficiency and the treatment capacity of pollutants are improved, the occupied area and the construction cost of the system are reduced, and it can be guaranteed that effluent stably reaches the surface IV water or above. The COD removal rate of the biological filter is 60%-85%, the BOD removal rate of the biological filter is 75%-85%, the NH4 < + >-N removal rate of the biological filter is 70%-85%, the TP removal rate of the biological filter is 40%-70%, and the turbidity removal rate of the biological filter is increased by 80%-90%.

The invention belongs to the technical field of sewage treatment, and particularly relates to a coagulating sedimentation circulating device for sewage treatment and a circulating method thereof.The coagulating sedimentation circulating device comprises a stirring tank, a sedimentation tank is arranged on one side of the stirring tank, a water outlet pipe is connected into the sedimentation tank, a chemical feeding pipe is arranged in the stirring tank, and a sewage inlet pipe is arranged in the stirring tank; a sludge outlet pipe is connected to the interior of the sedimentation tank, a sludge return pipe is fixedly connected to the sludge outlet pipe, a first electromagnetic flowmeter, a control valve and a separation box are sequentially assembled on the side wall of the sludge return pipe, and a second electromagnetic flowmeter is assembled on the sludge inlet pipe; a partition plate is fixedly connected to the inner wall of the separation box, an annular plate is rotationally connected to the top face of the separation box, and the annular plate penetrates through the separation box. A small amount of settled sludge can be discharged into the separation box, and the sludge is divided into large-granule sludge and small-granule sludge, so that the large-granule sludge and the small-granule sludge can be conveniently selected and used according to sewage treatment requirements, and impurities in sewage are assisted to settle.

The invention relates to a degradation treatment method and system for organic wastewater. The method comprises the following steps: adjusting the pH of the organic wastewater to be acidic; the method comprises the following steps: adding acidic organic wastewater and hydrogen peroxide into a photoelectric oxidation unit, carrying out electro-Fenton reaction on the hydrogen peroxide and an electrode group in the photoelectric oxidation unit to generate hydroxyl radicals for degrading the acidic organic wastewater, and regenerating Fe < 2 + > and the hydroxyl radicals in the solution through electrochemical reaction and ultraviolet excitation conjugation; adjusting the pH value of the wastewater subjected to the photoelectric oxidation treatment to be alkaline, adding a flocculating agent into the alkaline wastewater to obtain sludge precipitate and supernate, and performing subsequent treatment on the supernate. The regeneration rate of ferrous ions and hydroxyl radicals is improved by adopting a catalyst full-amount efficient utilization mode of natural precipitation of an induction iron electrode, electrochemical and ultraviolet light reduction and trace iron sludge precipitation, so that the degradation of organic matters in the organic wastewater is promoted.

The invention relates to curing slurry prepared based on engineering waste slurry and a preparation method thereof, and belongs to the technical field of curing slurry for engineering. The curing slurry for preparing the stirring pile and the jet grouting pile is prepared by pretreating the engineering waste slurry, adding the curing agent slurry, adjusting the specific gravity of the slurry and stirring. The method is completed by adopting an engineering abandoned slurry pretreatment system and a stirring pile and jet grouting pile solidified slurry preparation system. Wherein the engineering abandoned slurry pretreatment system consists of a slurry box, a filter screen, a slurry specific gravity fine adjustment box, a stirring head, a slurry specific gravity monitoring system, a water tank and a slurry pump; the stirring pile and jet grouting pile solidified slurry manufacturing system is composed of a stirring barrel, a silo, a weighing system, a mixing and stirring box and a slurry storage box. According to the manufacturing method, the problem that the resource utilization rate of the engineering abandoned slurry is low is solved, the cost is low, and the requirements of a stirring pile and a jet grouting pile for the fluidity, strength, water stability, low permeability, energy conservation and environmental protection of the solidified slurry are met.

The utility model relates to the field of ultrafilters, in particular to an ultrafilter device with a water outlet control function. The technical problems are as follows: the conventional water pressure conveyed by the conventional ultra-filter is always low in a place with insufficient water source, the water pressure of a water using side is difficult to guarantee by the conventional ultra-filter, a regulation and control device is difficult to start by the water pressure provided by the conventional ultra-filter to automatically inject water into a water tank, and the overall water outlet effect is reduced. According to the technical scheme, the ultrafilter device with the water outlet control function comprises a balance assembly, a steering adjusting assembly, a water outlet pressure control assembly, a purification assembly, an ultrafiltration assembly and a control panel; according to the difference that the conventional conveyed water pressure is always small and the water pressure of the water using side is difficult to ensure by the ultra-filter, after the filter element is mounted by using the mounting ring, parameters are adjusted by using the control panel, and the injection boxes are linearly distributed from bottom to top along the positioning frame, so that three-point butt joint operation on the purification assembly is formed, and overall stable water outlet is facilitated.

The utility model discloses a reclaimed water reuse treatment system for removing ammonia nitrogen, which belongs to the technical field of sewage treatment and sequentially comprises a regulating tank, an anoxic tank, a biological contact oxidation tank, an MBR (membrane bioreactor) membrane tank and a reclaimed water reuse tank according to the water inlet direction of sewage treatment, the adjusting tank comprises a lifting pump, the anoxic tank is provided with a carbon source supplementing system, the biological contact oxidation tank comprises an alkalinity supplementing system and a water inlet pump, the carbon source supplementing system is linked with the lifting pump, the alkalinity supplementing system is linked with the water inlet pump, and the carbon source supplementing system is additionally arranged to meet the requirement of denitrifying bacteria on a carbon source. The carbon source supplementing system is linked with the adjusting tank lifting pump, and automatic supplementing of the carbon source is achieved by setting the supplementing flow of the carbon source; the alkalinity supplementing system is additionally arranged to maintain the pH value of the wastewater in the nitrification stage, the alkalinity supplementing amount is reasonably adjusted according to the actual operation wastewater pH value condition, and the alkalinity supplementing system is linked with the water inlet pump to achieve automatic alkalinity supplementing.

The invention belongs to the technical field of municipal engineering, and particularly discloses a micro-polluted water treatment coupling device which comprises a pond body, a front area, a wetland area and an ecological pond are arranged in the pond body, the front area comprises a water distribution plate, a gravel layer and a biological filler layer, and overflowing holes are formed in the water distribution plate; a first water distribution baffle is arranged between the gravel layer and the biological filler layer; a first overflow baffle is arranged on one side, away from the gravel layer, of the biological filler layer; the humid area comprises a filler area, and a second water distribution baffle and a third water distribution baffle are arranged on the two sides of the filler area respectively; a second overflow baffle is arranged on the side, facing the humid area, of the ecological pond, the bottom of the second overflow baffle is connected with the bottom of the pond body, and the top end of the second overflow baffle is located below the water surface of the pond body. The device has the characteristics of low construction cost, low operation cost, good hydraulic impact resistance, difficulty in blockage, good denitrification effect, stable effluent and the like, and can reduce the concentration of pollutants in the micro-polluted water body, improve the effluent index and reduce the pollution input of the converged water body.

A low-drug coagulation-ultrafiltration device and a secondary coagulation-ultrafiltration device for dealing with high turbidity belong to the field of water treatment technology. The present invention solves the problem of low water treatment efficiency and inability to deal with sudden high turbidity water treatment in existing water treatment equipment. It includes a low-drug coagulation-ultrafiltration device, an intermediate water tank and a second dosing assembly tank. The second dosing assembly tank is connected to the coagulation assembly tank through a pipeline. The water inlet and outlet of the intermediate water tank are connected to the upper part of the inclined tube sedimentation area and the upper part of the coagulation assembly tank through the fourth water inlet pipe and the fifth water inlet pipe respectively. The pipeline is controlled by setting valves on each pipeline. Adaptive treatment of high turbidity changes in raw water is achieved. In severe weather such as heavy rain, high turbidity water treatment is achieved by starting the intermediate water tank and adding potassium permanganate to strengthen secondary coagulation, thereby reducing the cost of chemicals and reducing the floor space. When the water quality conditions are normal, such as low turbidity, it can directly enter the membrane filtration assembly tank without passing through the intermediate water tank.

The utility model relates to a wastewater treatment system for Maotai-flavor liquor. The wastewater treatment system comprises a neutralization tank, an anaerobic tower, an MAP reaction tank, a multi-stage AO tank, a Fenton tank, a powdered activated carbon membrane biological reaction tank and a resin denitrification tank which are connected in sequence, the neutralization tank is connected with a liquid alkali adding device, and the water outlet end of the neutralization tank is connected with the water inlet end of the multi-stage AO tank; the anaerobic tower is provided with a biogas collecting device; the MAP reaction tank is divided into a dosing area, a reaction area and a separation area; the water outlet end of the multi-stage AO tank is connected with the water inlet end of the Fenton tank through the secondary sedimentation tank; the Fenton tank is provided with a Fenton feeding device and a Fenton stirring device; the powdered activated carbon membrane biological reaction tank is provided with a powdered activated carbon feeding device and a membrane biological reaction aeration device, and an ultrafiltration membrane separation device is arranged in the powdered activated carbon membrane biological reaction tank. The wastewater treatment system can efficiently remove COD (Chemical Oxygen Demand), ammonia nitrogen, total nitrogen and total phosphorus in Maotai-flavor liquor wastewater, can recover energy and nitrogen-phosphorus fertilizers, and has considerable environmental benefits and economic benefits.

A multistage combined recovery process method for well head gas relates to the technical field of petroleum equipment and comprises produced liquid, the produced liquid is connected with a two-phase separator through a pipeline, the two-phase separator is connected with a first-stage cyclone separator, the first-stage cyclone separator is connected with a second-stage cyclone separator, the second-stage cyclone separator is connected with a first-stage cyclone dissolved air flotation device, and the first-stage cyclone dissolved air flotation device is connected with a second-stage cyclone dissolved air flotation device. The first-stage dissolved air flotation is connected with the second-stage dissolved air flotation, the second-stage rotational flow dissolved air flotation is connected with the first-stage filter, the first-stage filter is connected with the second-stage filter, the second-stage filter is connected with the reinjection water tank, the reinjection water tank is respectively connected with the second-stage filter and the first-stage filter, the second-stage filter and the first-stage filter are respectively connected with the backwashing water collecting tank, and the backwashing water collecting tank is connected with the backwashing water collecting tank. The backwashing water collecting tank is connected with the sludge dewatering equipment, and the sludge dewatering equipment is connected with the primary filter. The multistage combined recovery process method for the well head gas is advanced in filtering technology, high in filtering precision, good in effect, high in impact resistance and long in service life of a filter material, and ensures that the water quality is stable and reaches the standard.

The invention discloses a method for improving the crystal purity of struvite in the process of treating landfill leachate, and belongs to the field of environmental engineering technology. The steps of the method for improving the crystal purity of struvite in the process of treating landfill leachate include: homogenizing the landfill leachate and performing anaerobic digestion pretreatment, injecting the gas generated during the anaerobic digestion pretreatment into the landfill leachate after the anaerobic digestion pretreatment to perform a metal passivation reaction, adjusting the pH of the landfill leachate after the metal passivation reaction to 9-11, adding a magnesium source to perform a struvite crystallization reaction, and generating struvite crystals. Through the method provided by the invention, the crystal purity of the recovered struvite can reach more than 90%.