319 results about "Reflux" patented technology

The invention relates to an intelligent reflux module for a sewage treatment system, which comprises a pretreatment system, an anoxic tank, an aerobic tank, an MBR tank, a signal transmission line and a PLC, the anoxic tank, the aerobic tank and the MBR tank are sequentially arranged and communicated, the pretreatment system is connected to the anoxic tank through a water inlet pipeline, a first flowmeter is arranged on the water inlet pipeline, and a second flowmeter is arranged on the first flowmeter. The anoxic tank is provided with an ORP (oxidation reduction potential) online monitor, the aerobic tank is provided with a dissolved oxygen meter, a sludge concentration online monitor and an ultrasonic liquid level meter, an MBR membrane component is arranged in the MBR tank, and a mixed liquid reflux pump and a sludge reflux pump are arranged at the tail ends of the anoxic tank and the MBR tank. The PLC is connected with the sensor group, receives monitoring data of the sensor group, analyzes and processes the data and issues an instruction to control the frequency of the reflux pump or the opening degree of the electric control valve, the whole sewage treatment process is automatically controlled, the reaction balance and stability are maintained, and the sewage treatment efficiency is improved.

The invention provides a real-time optimization method for energy consumption in a chemical production process, which comprises the following steps: acquiring real-time purity data of a tower top product, comparing the real-time purity data with a target purity range, judging whether deviation occurs, if deviation occurs, acquiring a heating steam rate, a reflux amount, a feed preheating temperature and a tower plate blockage parameter, and evaluating an operation state; if blockage is detected and the gas-liquid contact efficiency is reduced, it is judged that the separation effect is reduced due to blockage, the blockage position and degree are obtained in real time, and the reflux liquid quantity parameter and the tower top condensation rate are dynamically adjusted to balance the tower top product purity and steam consumption; the efficiency difference between the gas-liquid contact efficiency and the target range is monitored in real time, the matching relation between the tower top product purity and the overall energy consumption is evaluated according to the process parameters and the equipment state, and the operation parameters and the load distribution are adjusted in real time to optimize the energy consumption distribution.

The invention provides a method suitable for monitoring scaling of a reflux condenser, and the method comprises the steps: monitoring the scaling condition of the reflux condenser in a chemical industry process through an AI deep learning method and a signal processing analysis method, and carrying out the monitoring of the scaling condition of the reflux condenser through the historical data collected in the process. The scaling condition of the reflux condenser is represented by combining a long short-term memory network of an AI deep learning method. The method comprises the following steps: S1, acquiring sensor data of an industrial process; s2, performing data cleaning on the process data to obtain feature data; s3, training a network by using historical data to obtain a data-driven scaling model; s4, process data of a new process are input, and the current scale deposition condition is predicted; according to the method, historical data collected in the manufacturing process of the reflux condenser is utilized, and the scaling size is represented in combination with the long-short-term memory network, so that the scaling size of the reflux condenser can be predicted or monitored and represented.

The invention is suitable for the technical field of agent adding, and particularly relates to a water treatment agent adding method and system.The method comprises the steps that a technological process diagram of a sewage treatment pond is drawn, a water inlet and a water outlet are found out, online monitoring equipment arranged at the water inlet and the water outlet in advance is used for collecting technological indexes of sewage, and the technological indexes of the sewage are obtained; a water inlet index and a water outlet index are defined; the two ends of the backflow pipeline are located at a water inlet and a water outlet respectively, the deployment mode of verification equipment and an intermediate storage tank in the backflow pipeline is set, the verification equipment is used for reading the concentration parameter of backflow liquid in the intermediate storage tank, the concentration parameter is defined as a verification index, the backflow ratio is set, and the verification result is obtained. And creating a multi-level verification mechanism. By collecting real-time sensing data, predictive accurate dosing can be realized, the use efficiency of the medicament can be optimized, a data basis is provided for advanced adjustment of a dosing system, and the stability of effluent quality is greatly improved.

The invention relates to the technical field of sewage treatment, and discloses an integrated sewage treatment nitrification liquid backflow control system. The system comprises a human-computer interaction interface, a water quality detection sensor acquisition module, a total nitrogen prediction module, a reflux pump control module and a data storage module which are connected through 485 communication interfaces. According to the method, a BP + LSTM mixed neural network is adopted, water quality detection parameters including the pH value, the chemical oxygen demand (COD), the biological oxygen demand (BOD), the sludge concentration (SS) and the dissolved oxygen (DO) are combined, the total nitrogen solubility in an anoxic pond and an aerobic pond in the integrated sewage treatment equipment is predicted, the nitrification liquid backflow proportion is calculated, and therefore operation of a backflow pump is accurately controlled. The system can adjust the backflow ratio of the nitrification liquid in real time, solves the problem that the existing equipment cannot adjust the backflow ratio in real time according to the total nitrogen content, and avoids the phenomenon of poor denitrification effect caused by low backflow ratio or energy waste caused by high backflow ratio.

The utility model discloses a water dispenser system with backflow pressure relief function, which comprises a filter unit, a booster pump, a reverse osmosis membrane group and a drinking device which are communicated in sequence, a three-way backflow valve is arranged on a water path where the booster pump is communicated with the filter unit, and a water flow switch valve is arranged at the water production end of the reverse osmosis membrane group. The water inlet end of the water flow switch valve is provided with a return pipe communicated with the three-way return valve, and the water outlet end of the water flow switch valve is intersected with the water inlet end of the drinking water equipment; water at the water production end is conveyed to the three-way return valve through the return pipe, so that the water production end of the reverse osmosis membrane group is decompressed to avoid frequent starting of the water flow switch valve, and then the water is conveyed to the reverse osmosis membrane group through the booster pump. When the water consumption of the water using end is small, repeated power-on and power-off of the water flow switch valve can be avoided, potential safety hazards of a water dispenser system are reduced, meanwhile, pressure relief can be achieved at the water producing end, and normal use and the filtering effect of the reverse osmosis membrane group function are ensured.

The utility model relates to the technical field of water passing performance testing equipment, in particular to a U-shaped backflow structure of a liquid tank backflow pipe, a liquid tank and a water passing performance testing machine. The U-shaped backflow structure comprises a backflow pipe and a flow meter used for detecting the flow in the backflow pipe. The backflow pipe sequentially comprises a head pipe section, a horizontally-arranged U-shaped pipe section and a tail pipe section in the direction from the head end to the tail end of the backflow pipe. The U-shaped pipe section sequentially comprises a first sub-section, a U-shaped bent section and a second sub-section in the direction from the head end to the tail end of the U-shaped pipe section. The flow meter is arranged at the U-shaped bent section, and the height of the U-shaped bent section is lower than the heights of the first sub-section and the second sub-section; the tail end of the head pipe section is connected with the first sub-section, and the head end of the tail pipe section is connected with the second sub-section. Due to the design of the U-shaped backflow structure of the backflow pipe of the liquid tank, the defect that the backflow pipe provided with a flow meter is not full of liquid can be overcome, the test value of the flow meter is more accurate, and abnormal noise is not prone to being caused by the change of the angle state of a valve on a pipeline in the water passing test.

The utility model provides a PVP (Polyvinyl Pyrrolidone) production wastewater treatment device and wastewater treatment equipment. A pre-anoxic tank, an anaerobic tank, an anoxic tank and an aerobic tank of the PVP production wastewater treatment device are sequentially communicated, a baffle is arranged in a fluid chamber of the pre-anoxic tank and divides the fluid chamber into a first reflux chamber and a second reflux chamber, a first reflux stirrer is arranged in the first reflux chamber, and a second reflux stirrer is arranged in the second reflux chamber. A rotary backflow blade of the first backflow stirrer is arranged towards the direction of the water outlet, the second backflow stirrer is arranged in the second backflow chamber, and a rotary backflow blade of the second backflow stirrer is arranged towards the direction of the water inlet, so that water flow circularly flows in the first backflow chamber and the second backflow chamber in the direction from the water inlet to the water outlet; the water flow sequentially passes through the first phosphorus-accumulating denitrifying bacterium filler piece arranged in the first backflow chamber and the second phosphorus-accumulating denitrifying bacterium filler piece arranged in the second backflow chamber. According to the PVP production wastewater treatment device, the nitrogen and phosphorus removal effect of the device is enhanced by improving the pre-anoxic tank.

According to the method for detecting the content of the volatile substances in the aquilaria sinensis, provided by the invention, through pretreatment steps such as extraction of an extraction solvent, heating reflux and filtration, a sample is selectively and preliminarily purified, and the matrix effect of subsequent detection and analysis is effectively reduced; an inert capillary column is used for separation, high-purity helium is used as carrier gas, and an optimized heating program and an MRM detection mode are combined; through the synergistic effect of the two components, comprehensive, accurate and high-repeatability qualitative and quantitative analysis of various volatile substances in the aquilaria sinensis, especially nookatone which is easy to leak in a conventional method, is realized, and a reliable technical means is provided for accurate identification and quality evaluation of the aquilaria sinensis.

The application provides a hydrogen deep removal and moisture removal method. High-concentration raw gas is dynamically mixed with dry low-concentration reflux gas in a mixer to form mixed gas, so as to reduce the hydrogen content and reduce the reaction risk. After pressurized heating, oxygen with a precisely matched hydrogen concentration is injected into a reactor for reaction. The reactor is provided with an alternating fixed and rotatable cylinder, and the inner wall of the flow channel is coated with a catalyst; the corresponding cylinder speed is automatically adjusted based on real-time hydrogen concentration detection downstream, and the speed is accelerated when the concentration exceeds the standard to strengthen turbulent contact and prolong the reaction time, combined with the concentration threshold setting decreasing along the flow direction, so that the hydrogen is deeply removed to an ultralow level. The reaction generates moisture, most of which is separated by two-stage water cooling, and then is deeply adsorbed and dried to be completely removed to an ultralow content. Finally, the gas is divided into two parts, one part is output as product gas, and the other part is completely dried reflux gas which is recycled to the initial mixing step to reduce the reaction risk of high hydrogen content.

The invention relates to a reactive distillation device and method for automatically separating phases and refluxing to a reaction section, and belongs to the technical field of chemical reaction and separation coupling. The reactive distillation tower (1) sequentially comprises a distillation section (11), a reaction section (12) and a stripping section (13) from top to bottom, the tower bottom of the reactive distillation tower (1) is connected with a heater (2), the tower top of the reactive distillation tower (1) is sequentially connected with a tower top condenser (3) and an automatic phase splitter (4) through pipelines, materials are condensed by the tower top condenser (3) to form a water phase and an oil phase which are not completely mutually soluble, and the water phase and the oil phase are separated from each other. After automatic phase splitting in the automatic phase splitter (4), the water phase automatically and continuously flows into a water phase collecting tank (5) from the upper part of the automatic phase splitter (4), the oil phase automatically and continuously flows out from the lower part of the automatic phase splitter (4), one part of the oil phase returns to the rectifying section (11) through the reflux ratio controller (6), and the other part of the oil phase returns to the rectifying section (11) through the reflux ratio controller (6); one part of the gas automatically flows back into the reaction section (12) by virtue of the liquid level to continuously react, so that a high-purity product is obtained in the tower kettle. The device is simple in structure and control method and convenient to operate, unreacted raw materials are rectified and then automatically flow back into the reaction section in a split-phase mode to participate in the reaction again, the raw material utilization rate is increased, the reaction conversion rate is high, and a water phase and an oil phase can be automatically extracted in a split-phase mode and flow back.

The invention relates to the technical field of chemical engineering, and discloses a method for improving the chromaticity and purity of acetic anhydride based on a reflux ratio, and the method comprises the following steps: optimizing an evaporation tower, an acetic acid rectifying tower and an acetic anhydride rectifying tower, and installing an online detection instrument and an automatic control valve to construct an intelligent rectification control system; evaporating the crude acetic anhydride by using the optimized evaporation tower to obtain crude acetic anhydride steam; feeding the crude acetic anhydride steam into an acetic acid rectifying tower, calculating an initial reflux ratio, inputting the initial reflux ratio into a control system, and starting a reflux system to preliminarily remove acetic acid; monitoring the acetic acid content through an online gas chromatograph, and finely adjusting the reflux ratio until the reflux ratio reaches the standard when the measured acetic acid content is higher than a target value; feeding the crude acetic anhydride reaching the standard into an acetic anhydride rectifying tower, calculating an initial reflux ratio, inputting the initial reflux ratio into a control system, and starting to obtain an intermediate product; monitoring chromaticity and purity through an on-line platinum-cobalt colorimeter and an on-line gas chromatograph, and updating the reflux ratio to be qualified according to a bivariate adjustment formula; and finally, carrying out all-item detection on a finished product, and locking reflux ratio parameters after confirming that the finished product is qualified.

The utility model belongs to the technical field of production of imine products, and particularly relates to an efficient solvent distillation safety device for imine products. Comprising a distillation still, the top of the distillation still is connected with a condenser, the condenser is respectively connected with the distillation still and a solvent metering tank through a reflux ratio controller, the distillation still is provided with a temperature control device, the reflux ratio controller is connected with the distillation still through a reflux pipeline, and the reflux pipeline is provided with a sampling pipeline. And the reflux ratio controller controls the liquid flow between the distillation kettle and the condenser by adjusting the reflux ratio, and the reflux and extraction ratio can be randomly set, so that the solvent can be completely evaporated from imine products. And the reflux ratio controller is connected with a DCS (Distributed Control System) to realize automatic control. The sampling pipeline is arranged on the reflux pipeline for sampling detection, so that the percentage of the solvent in the imine product can be detected, and the distillation condition and progress can be conveniently controlled.

The utility model discloses a sludge double-reflux reaction device, which relates to the technical field of sewage treatment and comprises an anaerobic tank and an auxiliary component, an anoxic tank is arranged on the right side of the anaerobic tank, the bottom of an aerobic tank is connected with a secondary sedimentation tank through a pipeline I, and the auxiliary component is arranged above the right side of a concentration tank. The output end of the servo motor is connected with a two-way lead screw, the exterior of the first bevel gear is connected with a second bevel gear, the exterior of the two-way lead screw is connected with a lead screw nut, a spring is arranged at the top end of the interior of the supporting seat, and a supporting plate is arranged at the bottom of the sliding rod. According to the sludge double-reflux reaction device, sludge enters the anaerobic tank from the concentration tank through the pipeline V and the delivery pump, sewage and sludge in the anaerobic tank are fully mixed through the stirrer, and then the mixed sludge enters the anoxic tank to provide an internal carbon source for denitrification reaction of the anoxic tank, so that the device realizes stable deep denitrification under the condition of no external carbon source; the operation cost is saved.

The application is suitable for the technical field of deep cooling nitrogen production, and particularly relates to a deep cooling air separation reflux control method and related device. The method comprises the following steps: obtaining production control data and production process data chain of air in a separation process; determining a separation condition chain based on the production control data and the production process data chain; wherein the separation condition chain is used to reflect the change degree of component data of the air under the influence of separation parameter setting corresponding to each separation process in the separation process; determining a separation control strategy based on the separation condition chain, the production process data chain and the production control data; wherein the separation control strategy comprises a first strategy for reflecting that a product with incomplete separation is washed again or a second strategy for reflecting that a product with complete separation is stored in a storage tank. The deep cooling air separation reflux control method provided by the application can improve the production efficiency of oxygen, nitrogen, argon and other production products.

The invention discloses a reflux ratio control device for a double-reflux AOA process, and relates to the technical field of sewage treatment.The reflux ratio control device comprises an anaerobic tank, an aerobic tank, an anoxic tank and a secondary sedimentation tank which are sequentially distributed from left to right, and the anaerobic tank, the aerobic tank, the anoxic tank and the secondary sedimentation tank are sequentially connected in series through a sewage transfer assembly; the reflux ratio control device further comprises a sludge discharge position control mechanism, an upper-layer sludge reflux mechanism and a lower-layer sludge reflux mechanism, the sludge discharge position control mechanism comprises a sludge discharge rotating pipe, and the center of the bottom of the secondary sedimentation tank is rotationally connected with the bottom end of the sludge discharge rotating pipe. The sludge close to the lower layer in the secondary sedimentation tank can flow back into the anoxic tank, and the sludge close to the upper layer in the secondary sedimentation tank can flow back into the anaerobic tank, so that the sludge with higher nitrate content close to the lower layer in the secondary sedimentation tank is prevented from flowing back into the anaerobic tank; the mixing efficiency of the sludge flowing back to the anaerobic tank and the anoxic tank and the sewage entering the tank or the original sewage in the tank is high, so that the treatment efficiency of the sewage is improved.

The utility model discloses a reflux mechanism for high-temperature pretreatment of trace biological samples, which relates to the technical field of biological sample pretreatment, and comprises a plurality of reflux caps, a plurality of test tubes and a heater, the heater consists of a shell and a heating plate, the heating plate is provided with a group of uniformly distributed heating holes, and the reflux caps are arranged on the shell. The heating plate is a porous metal heating plate; each test tube is inserted into the corresponding heating hole, and the diameter of the outer wall of each test tube is matched with the inner diameter of the corresponding heating hole. The backflow cap made of glass replaces a traditional plug, is suitable for high-temperature reaction of trace samples, can meet the requirement for simultaneous treatment of multiple samples, is suitable for high-temperature reaction of different organic solvents at the temperature close to or higher than the boiling point temperature of the organic solvents, ensures that the samples have constant reaction solvent volume in the long-time high-temperature reaction, and improves the reaction efficiency. The high-temperature reaction effect of the solvent and a biological sample is effectively improved.

The invention discloses a reflux device and method for producing aluminum sec-butoxide, relates to the technical field of preparation of organic aluminum compounds, and aims to solve the problems that near-boiling residues are difficult to separate, the reflux efficiency is low and the improvement cost is high in the existing aluminum sec-butoxide production. The device comprises a reaction unit, an adsorption-condensation integrated separation unit, a directional reflux distribution unit and a hydrogen recovery unit, and all the units are matched with existing reaction kettles. The method comprises the steps of pretreatment, reaction reflux and post-treatment. The purity of aluminum sec-butoxide is larger than or equal to 97.5%, the conversion rate of aluminum powder is larger than or equal to 90%, the cost per ton is reduced by 1500 yuan, the transformation cost is 0.28 million yuan, and the method is suitable for low-cost transformation of small and medium-sized enterprises.

The utility model discloses a reactor for an alkaline rinsing wastewater treatment system. The reactor comprises a flocculation reaction tank; the coagulant mixing mechanism comprises a fixed cylinder arranged at the upper part of the flocculation reaction tank, and a mixing shaft is rotationally mounted in the fixed cylinder; the coagulant adding mechanism comprises a quantitative dosing pipe and a quantitative water adding pipe which are connected into the fixed cylinder; the mixing driving mechanism comprises a first metering pump for pumping and draining supernate and a return pipe, a rotating rod is transversely and rotatably mounted on the fixed barrel, one end of the rotating rod is inserted into the return pipe and is fixedly connected with a corresponding impeller, and the rotating rod is in transmission connection with the mixing shaft; the spiral water passing pipe is wound on the outer side of the fixed barrel, the water inlet end of the spiral water passing pipe is connected to the water outlet end of the sewage concentration tank, and the water outlet end of the spiral water passing pipe is connected into the flocculation reaction tank. According to the utility model, the uniform mixing of the alkaline rinsing wastewater and the coagulant can be effectively realized without power intervention.

The diphenyl carbonate reactive distillation system comprises a reactive distillation tower, a reflux pipeline, a tower top reflux tank, a first condenser, a methanol recovery system, a reflux pump, a side extraction pipeline, a side extraction pump, a buffer tank, a discharge pipeline, a tower bottom pump and a flash tank, a tower top liquid material of the reactive distillation tower enters a tower top reflux tank through a reflux pipeline, and a gas material enters a methanol recovery system after being condensed by a first condenser; controlling the reflux ratio, and refluxing the material in the tower top reflux tank; the reactive distillation column is provided with a height-adjustable side line extraction opening for extracting by-products such as anisole; and separating the reaction organisms through a flash tank to obtain diphenyl carbonate. The device integrates chemical reaction and rectification separation, methanol is separated from a material refluxed at the top of the tower, by-products such as anisole are extracted from a side line, the thermodynamic equilibrium of the reaction is broken, and the reaction is pushed to proceed in the positive direction, so that the conversion rate is increased, and meanwhile, a plurality of by-products are obtained; and the side line extraction position is adjustable, safe and convenient.

The invention discloses an indwelling needle heparin lock with an anti-backflow function, and belongs to the technical field of medical puncture tools. Comprising a main pipeline, a branch pipeline is integrally formed on the right side of the main pipeline, a main pipe cap is fixedly connected to the upper portion of the outer side wall of the main pipeline, a branch pipe cap sleeves the upper portion of the outer side wall of the branch pipeline, an extension pipe is fixedly connected to the lower surface of the main pipeline, and the interior of the extension pipe communicates with the interior of the main pipeline; the main pipeline and the branch pipeline are integrally formed, the medical duckbilled valve is arranged in the main pipeline, the stable one-way conduction effect can be achieved, liquid can smoothly pass through during infusion, the valve port is automatically closed when infusion is stopped or a blood backflow trend exists, blood backflow is fundamentally blocked, and the safety of infusion is improved. The risks of pipeline blockage, blood return pollution and infection are effectively reduced, and needle-free closed operation can be achieved in cooperation with the first silica gel diaphragm in the main pipe cap.

The invention discloses a device for separating low-boiling-point substances in white spirit based on pneumatic reflux. The device comprises a gas source, a separation tank, a condensation assembly and a reflux assembly, the air source is communicated with the separation tank, the separation tank is provided with an air outlet hole matched with the condensation assembly, and the condensation assembly is communicated with the separation tank through the air outlet hole; multiple stages of condensation parts with different condensation temperatures are arranged on the condensation assembly, each stage of condensation part is communicated with the separation tank through a reflux assembly, and at least one group of recoverers is arranged in the reflux assembly.

A rotatable, reflux distillation system is disclosed that includes a rotatable, reflux distillation column, a lower end transition pipe, an upper end transition pipe, a rotational drive assembly, and a vapor reduction system. The rotatable, reflux distillation column is angled between 10-20 degrees from horizontal, and has a lower vapor input end and an upper fluid exit end. The lower end of the reflux distillation column is operatively associated with a lower seal housing, and the upper end of the reflux distillation column is operatively associated with an upper seal housing. The lower end transition pipe is operatively associated with the lower end of the reflux distillation column and includes a lower thermocouple, while the upper end transition pipe is operatively associated with the upper end of the reflux distillation column and includes an upper thermocouple and a fluid exit gate. The rotational drive assembly rotates the reflux distillation column. The vapor reduction system reduces the vapor into condensate liquid.

The utility model provides a reflux device for cyclization reaction, which relates to the technical field of cyclization reaction, and comprises a condenser pipe, an auxiliary mechanism is arranged on the condenser pipe, the auxiliary mechanism comprises a round pipe, a connecting pipe is arranged in the round pipe, a fan is arranged at one end of the round pipe, a heat insulation plate is fixed on the outer wall of the round pipe, and the heat insulation plate is fixed on the outer wall of the round pipe. And semiconductor chilling plates are arranged on the front surface and the rear surface of the connecting pipe. According to the utility model, the auxiliary mechanism is arranged, so that the cyclization reaction reflux device has various condensation modes, and evaporated reactants can be condensed and refluxed timely and effectively in some cyclization reactions needing rapid condensation and reflux, thereby improving the reaction progress, reducing the time of the cyclization reaction and improving the yield of the cyclization reaction. Not only is the use effect of the cyclization reaction reflux device improved, but also the use efficiency of the cyclization reaction reflux device is improved.

The utility model discloses an anti-backflow conveying pipe which comprises a conveying main pipe, a liquid inlet and a slurry inlet. The liquid inlet and the slurry inlet are vertically communicated with the conveying channel of the conveying main pipe; and an anti-reflux baffle is arranged below the slurry inlet and divides the conveying channel into a slurry conveying channel and a liquid conveying channel. The anti-backflow baffle is arranged in the conveying main pipe, the feeding pressure of slurry is transferred forwards, it is avoided that the slurry is reversely discharged from the liquid inlet due to the pressure difference between the slurry and the liquid inlet, the conveying channel is divided into two parts through the anti-backflow baffle, the upper layer serves as a slurry conveying channel, the conveying pressure is large, and the lower layer serves as an overflow liquid conveying channel. The conveying pressure is small, and the slurry and the overflow liquid are communicated again in front of the mixing outlet of the conveying channel, so that the slurry and the overflow liquid are independently conveyed and finally mixed in the conveying main pipe, and the solid-liquid separation efficiency and quality are improved.

The invention discloses a preparation method of solar concentrating resin. According to the method, bi-phenolic methane and dimethoxypropane are dissolved in the molar ratio being 1:(8-12), meanwhile, 8-12 ml of a catalyst is added, and the mixture is heated to the temperature of 65-70 DEG C and has a reaction at the temperature for 28-32 min; the mixture is cooled to the temperature of 60 DEG C, a first part of liquid caustic soda is slowly and dropwise added, the mixture is heated, and the reaction temperature is kept to range from 65 DEG C to 70 DEG C, reflux is performed for 2 h, the dimethoxypropane which does not react is recovered in a reduced pressure manner, the mixture is cooled to the temperature below 65 DEG C, 55-65 ml of a solvent is added, meanwhile, a second part of liquid caustic soda is dropwise added, reflux is performed for 2 h, a solvent solution turns yellow and is cooled and washed with hot water, a water layer is separated until the solvent solution is transparent, the solvent is evaporated out, and the resin is prepared. The resin has the characteristics of high concentrating property, high precision, good weather resistance, low cost and the like and can comprehensively improve the efficiency and the quality of a solar concentrating power generation system in the aspects of the optical effect, the weather resistance and the technology.

The utility model relates to reflux water-carrying reaction device technical field, and disclose a kind of for benzene ether difenoconazole cyclization safe reaction reflux water-carrying reaction device, including condenser tube, reaction kettle, heating platform and support, condenser tube and heating platform are fixedly installed on support, reaction kettle is installed on heating platform, still include water drain pipe, the water drain pipe includes layered pipe, buffer tube, connecting pipe, buffer tube is round arc, and top end is communicated with connecting pipe, bottom end is communicated with layered pipe middle, the top end of connecting pipe is communicated with condenser tube bottom end.The utility model, when using, the condensate that condenser tube is dripped is first fallen in the top of round arc buffer tube, then be sent to the middle part of layered pipe, in this way, it can avoid condensate drop when impacting organic matter floating layer, ensure that the purity of refluxing organic matter is enough, simultaneously, it can also automatically keep the liquid level of layered pipe, it is more convenient and safe to use.

The utility model discloses an adjustable negative pressure anti-reflux drainage device which comprises a negative pressure drainage bottle and a negative pressure regulator, and the adjustable negative pressure anti-reflux drainage device is provided with an anti-reflux valve. The utility model aims to provide a disposable adjustable negative pressure anti-reflux drainage device which can be arranged under negative pressure and can prevent reflux.

The application discloses a kind of carolic acid and preparation method thereof, and specifically relates to the field of medical technology.The method comprises the following steps: stirring catalyst H2WO4 / C with hydrogen peroxide, then adding dichloro chrysanthemic acid ethyl ester; oil bath heating is carried out, reaction temperature is controlled, repeated reflux is carried out, and oxidation reaction is carried out; after the reaction, homogeneous transparent solution is filtered, extracted, and subjected to reduced pressure distillation to obtain carolic acid product.In the application, when catalyzing and oxidizing dichloro chrysanthemic acid ethyl ester, a high-activity H2WO4 / C heteropoly acid is used as a catalyst, the reaction scheme is optimized, the selectivity of the reaction is greatly improved, the number of cycles of the catalyst is increased, and after 20 cycles of the new catalyst, the catalyst activity does not decrease obviously.Furthermore, due to the great improvement of selectivity, the loss of product is reduced, and the yield is improved.

This application relates to the field of wastewater treatment technology, specifically disclosing a multi-flow stabilization control system for internal and external recirculation pump sets. It aims to solve the problem of insufficient flexibility caused by the single recirculation mode and lack of emergency control measures in existing systems. The system includes: a first and second biological tank series equipped with key variable frequency pumps, a multi-functional fluid switching network, and an intelligent stabilization module. The switching network connects the two pump series across series via interconnected pipes and valve groups; the intelligent stabilization module controls the valves and pump frequency according to real-time operating conditions, enabling flexible switching between venting, emergency water distribution, rapid recovery, and cross-recirculation modes. This application breaks through the limitations of traditional single-line operation, significantly improving the system's resilience, load-bearing capacity, and nitrogen and phosphorus removal efficiency, while reducing operating costs.