440 results about "Reflux" patented technology

The invention belongs to the technical field of food processing equipment, and particularly relates to an air bag anti-reflux cannula for gastroscope treatment, the air bag anti-reflux cannula comprises a sleeve assembly, the sleeve assembly comprises a gastroscope sleeve, and the outer side of one end of the gastroscope sleeve is uniformly provided with a plurality of sliding adjusting grooves; and the sliding type air bag assembly is installed on the outer sides of the multiple sliding adjusting grooves, the sliding type air bag assembly comprises a first sliding block, the first sliding block is installed at one end of each sliding adjusting groove in a sliding mode, and the top of the first sliding block is rotationally connected with a first connecting rod arm. The anti-reflux airbag capable of changing the expansion diameter is adopted, only the inner wall of the esophageal inlet is slightly extruded in a normal state, the anti-reflux airbag can be pushed to expand through upward upwelling of gas in the stomach when reflux occurs, the esophageal inlet is temporarily and completely blocked, reflux is avoided, and after reflux is finished, the shrunk esophagus can push the anti-reflux airbag to reset, so that the anti-reflux effect is achieved. And a better anti-reflux effect can be achieved without highly expanding to continuously extrude the esophagus inlet.

The invention relates to the technical field of chemical rectification equipment, in particular to a method and device for improving rectification purity by adjusting the reflux ratio, and the method comprises the following steps: determining the total reflux position and the total extraction position of a liquid separation module; an initial position is set, and the liquid separation module is deflected to the initial position; collecting distillate and analyzing the purity of the distillate; the obtained purity is compared with the set purity, and the deflection direction of the liquid separation module is determined; the liquid separation module is adjusted to deflect towards the determined deflection direction; the measurement position is obtained until the purity of the distillate reaches the maximum; and performing rectification treatment on the to-be-treated liquid according to the screened measurement position so as to improve the rectification purity of the to-be-treated liquid. Through mutual cooperation of all the units, multi-point adjustment of the swing position of the liquid separation module between total reflux and total extraction can be realized, so that the reflux ratio is accurately controlled, and the rectification purity is improved.

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 utility model provides a pH detecting and adjusting system for flunixin synthesis. The pH detecting and adjusting system comprises a reactor, and a motor, a pH adjusting agent inlet, a reflux inlet and a reactant inlet are arranged at the top of the reactor. A product outlet is also formed in the bottom of the reactor. A first valve is mounted at the pH regulator inlet, a second valve and a third valve which are connected in parallel are connected to the product outlet, a filtering device, a circulating pump and a pH detection device are sequentially connected behind the third valve in the material flowing direction, and the pH detection device is connected with the reflux liquid inlet. According to the system provided by the utility model, solid materials in the materials are filtered through the filtering device, so that the interference of the solid materials on a pH detection result is reduced. Meanwhile, the pH detection device can detect the pH value of the material in the reactor in real time, is convenient and rapid, does not need manual sampling, reduces the labor intensity and danger of workers, does not overflow the material or peculiar smell in the detection process, and is safer and more efficient.

The invention relates to the technical field of sewage treatment, in particular to an internal and external backflow automatic control system for sewage treatment. The system comprises an internal reflux system and an external reflux system, and the internal reflux system adjusts the frequency of internal reflux pumps or the number of started internal reflux pumps by monitoring the change of water quality parameters such as nitrate nitrogen, nitrite nitrogen, ammonia nitrogen and dissolved oxygen so as to maintain the balance of nitrification and denitrification reactions; and the external reflux system adjusts the flow of an external reflux pump by monitoring the sludge concentration and the sludge level height so as to maintain the concentration and activity of microorganisms in the biological reaction tank. Besides, the system also adopts a mathematical model, a feedforward control strategy and a feedback control module, so that the response speed and the stability of the system are improved, the effective treatment of sewage is ensured, and the overall treatment efficiency and the effluent quality are 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 an efficient reaction kettle for pharmaceutical raw material medicine, which comprises a reaction kettle body, a driving motor, a stirring frame and a backflow rotating mechanism, and the backflow rotating mechanism comprises an infusion pump, a first backflow pipe, a second backflow pipe, a shunting ring pipe and a rotational flow body. The stirring frame can mix and stir materials, the infusion pump can pump the materials at the inner bottom of the reaction kettle body into the shunting ring pipe, then the materials are shunted and sprayed out into the vortex chamber through the liquid outlet pipe, and a vortex effect can be formed by utilizing the conical umbrella and the vortex channel at the bottom of the vortex body, so that the stirring and mixing efficiency of the materials is improved, and the stirring effect is improved. Moreover, the materials can be more uniformly distributed in the reaction kettle due to the rotational flow effect, so that the situation that the local concentration is too high or too low is avoided, and the uniformity and stability of the reaction are ensured; materials at the bottom are pumped to the top through the infusion pump, so that convection and mixing efficiency of the materials can be promoted, and the mixing effect is improved.

The present disclosure relates to systems and / or methods for enabling a reflux process in one or more distillation columns. For example, various embodiments described herein can relate to a method that can utilize the column's feed stream to provide an internal reflux mechanism in the top portion of the distillation column. For instance, the method can include capturing overhead vapor from a distillation column. Additionally, the method can include comingling the overhead vapor with a feed stream. Further, the method can include partially condensing the feed stream to form a liquid hydrocarbon feed stream that is supplied to a top portion of the distillation column. In one or more embodiments, the comingling can incorporate reflux functionality into the liquid hydrocarbon feed stream to promote a rectification process in the top portion of the distillation column.

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 invention discloses a method for realizing stable and up-to-standard effluent, energy conservation and consumption reduction by using intelligent internal reflux, and belongs to the technical field of sewage treatment. According to the method, the TN concentration of the inlet water of the sewage treatment plant is collected through an inlet water TN probe, the required reflux ratio is calculated according to the effluent standard, the required internal reflux ratio r is obtained by subtracting the actual external reflux ratio R from the total reflux ratio (R + r) according to the calculation result, and the calculation result is checked according to the NO3 <->-N concentration of the effluent at the tail end of the anoxic tank and the tail end of the aerobic tank. And correcting the calculated result r. When the concentration of NO3 <->-N in the effluent of the aerobic tank is higher than a theoretical value and exceeds 1mg / L, the internal reflux quantity is increased. And the internal reflux ratio is adjusted according to the corrected result, and reflux is performed as required, so that the effluent reaches the standard, the fluctuation of TN of the effluent is reduced, the reflux power consumption is reduced, and the purposes of reducing pollution and carbon are achieved.

The utility model discloses a two-stage rectifying tower for bromine extraction, which comprises a base, two groups of fixing frames arranged on the upper end face of the base, a rectifying tower body arranged inside the top ends of the fixing frames, a reflux inlet arranged at the bottom end of the rectifying tower body, a reflux pipe arranged at the bottom end of the reflux inlet, and a delivery pump arranged at one end of the reflux pipe. And a first flow guide pipe is arranged at the output end of the conveying pump. The finished product discharge pipe is arranged at the bottom end of the rectifying tower body, the reflux inlet is formed in the bottom end of the finished product discharge pipe, and the reflux pipe is arranged at the output end of the reflux inlet, so that liquid at the bottom end of the rectifying tower body flows back into the reboiler by the reflux pipe through the first flow guide pipe, and the phenomenon that the liquid flows back into the reboiler during distillation is avoided; and the residual bromine in the cooled liquid is discharged and discarded as a prepared liquid, so that the resource waste is caused.

The utility model relates to a reflux reaction kettle which comprises a kettle body, a stirring mechanism is arranged in the kettle body, a heating layer is arranged on the outer side of the kettle body, a reflux assembly is arranged on the kettle body and comprises an evaporation pipe, a reflux pipe and a cooling box, the cooling box is arranged on the upper side of the kettle body, and the cooling box is connected with the kettle body through the evaporation pipe and the reflux pipe. A cooling pipe is arranged in the cooling box, two ends of the cooling pipe are connected with the outer side cooler, a guide plate is arranged on the upper side of the cooling pipe in the cooling box, a condensation sheet group is arranged in the cooling box, and a tail gas treatment mechanism is arranged on the upper side of the cooling box; after materials are put into the kettle body, the stirring mechanism stirs the materials, the heating mechanism heats the materials, when the materials are heated till backflow occurs, material steam is conveyed to the cooling box through the evaporation pipe and is cooled through the cooling pipe, part of the material steam is condensed and flows back, the rest of the material steam is guided by the guide plate, condensed by the condensation piece set and then flows back, and liquid after backflow is conveyed back to the kettle body through the backflow pipe. The device has the effects of sufficient condensation and backflow and relatively good backflow.

The invention relates to the technical field of chemical equipment, and discloses kettle top single-flange-opening material sampling reflux equipment which comprises a connecting flange used for being connected with a kettle top, an ingress pipe is slidably arranged in the middle of the connecting flange, a bent part is connected to the top of the ingress pipe, and the bent part is connected with one end of a connecting pipe through a one-way valve. A through hole piston is arranged at the other end of the connecting pipe, a transition box is arranged on the outer wall of the through hole piston in a sliding mode, a cavity in the middle of the connecting pipe is communicated with a through hole in the middle of the through hole piston, a material taking component is connected to the bottom of the transition box, and a plurality of driving assemblies are arranged on the transition box. According to the device, materials with different flowability are subjected to differential treatment, an electric valve, heating and compressed air are utilized, sufficient backflow of the materials, thorough emptying of a pipeline, waste reduction and sampling precision improvement are ensured, and meanwhile, dead-corner-free cleaning, rapid material switching, downtime reduction and cross contamination avoiding are achieved through pressure difference regulation and control and repeated back-and-forth cleaning.

The invention belongs to the technical field of oil-gas field development, and particularly relates to a foaming agent and a synthesis method and application thereof. The synthesis method comprises the following steps: adding 1-amino-3, 6, 9, 12, 15, 18-hexaoxaheneicosan-21-acid and ethanol into a high-pressure reaction kettle, stirring and dissolving, adding 4-(2-bromoethyl) sodium benzenesulfonate, continuously stirring, adjusting the pH value to 8-9 by using sodium hydroxide, heating and preserving heat, and adjusting the pH value to 8-9 by using sodium hydroxide during the period; and adding bromotetradecane into the solution, heating and refluxing, adjusting the pH value to 8-9 by using sodium hydroxide during heating and refluxing, carrying out reduced pressure distillation to obtain a viscous solid, and recrystallizing by using normal hexane to obtain a product, namely the foaming agent. The foaming agent provided by the invention has the advantages of strong foaming power, good stability and low interfacial tension.

The invention discloses a vapor chamber and a preparation method thereof, the vapor chamber comprises an upper cover plate, a lower cover plate and a capillary structure, the upper cover plate and the lower cover plate form a sealed cavity, and the capillary structure is packaged in the sealed cavity; the capillary structure comprises a liquid backflow layer, a steam transmission layer and a supporting layer which are overlapped, and the liquid backflow layer is used for guiding liquid condensed by the condensation area back to the evaporation area again through the capillary action; the steam transmission layer is used for providing a low-resistance path for steam to move to the condensation area; and the supporting layer is used for providing support for the liquid backflow layer and the steam transmission layer. The heat dissipation reliability of the vapor chamber can be improved.

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 discloses a biological floc concentration device and a submerged sludge treatment system, which relate to the technical field of sewage treatment and comprise an anti-backflow cone, an overflow flow guide mechanism, an overflow check ring plate, a separation sludge discharge barrel, a top cover plate and a fixed connecting rod, the overflow flow guide mechanism comprises an overflow water collecting tank and an overflow flow guide water outlet pipe which are coaxially arranged and communicated with each other, and the anti-backflow cone is fixedly arranged on the circumferential outer wall surface of the overflow flow guide water outlet pipe, is coaxially arranged with the overflow flow guide water outlet pipe and is located on the inner side below the overflow check ring plate; the small-diameter end of the top of the anti-backflow cone is arranged upwards, and a flow guide gap is reserved between the anti-backflow cone and the inner wall face of the sludge discharging barrel. According to the biological floc concentration device disclosed by the utility model, the anti-backflow cone is positively arranged in the conical cylinder of the cyclone, so that the separated biological floc and a carrier are prevented from being reversely mixed again, a cone selection part of a conventional cyclone concentrator is canceled, and the mounting height of the biological floc concentration device can be reduced.

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.

The utility model discloses a coal tar dehydration device which comprises a distillation flask (3), a reflux condensate water collector (7) connected with the distillation flask (3), a first collection flask (11) connected with the lower part of the reflux condensate water collector (7), and a coiled pipe condenser (10) and a second collection flask (12) which are sequentially connected with the upper part of the reflux condensate water collector (7), and a flow guide fan blade (6) is arranged in the reflux condensate water collector (7). The coal tar dehydration device provided by the utility model has the characteristics of simplicity and convenience in installation and operation, thorough water separation, high dehydration efficiency and no discharge of irritant gas.

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.

A gastroscope anti-reflux device is arranged at the front of the handle end of the endoscope tube and connected to the working channel of the endoscope tube. The gastroscope anti-reflux device has an upper and lower bidirectional channel, and there are staggered reflux grooves between the upper and lower bidirectional channels. The reflux grooves are U-shaped structures, interconnecting the upper and lower channels, and the opening direction of the reflux grooves is toward the direction of the gastroscope lens. It has two staggered reflux channels, which do not produce resistance to the forward flow of liquid, and will continuously produce shunting and backtracking effects on the impact of reverse flow of liquid, blocking the fluid in the upper and lower channels from flowing under pressure, and achieving a stable and reliable anti-reflux effect.

In order to solve the technical problem that the reflux of secondary steam condensate is unstable in the prior art, which affects the efficiency of bubble tower cleaning, the embodiment of the present invention provides a stable reflux device and method for secondary steam condensate of radioactive waste liquid, including: a waste liquid evaporator, which is used to communicate with a liquid storage tank for storing waste liquid; a purifier, which is used to communicate with the waste liquid evaporator; a condenser, which is used to communicate with the purifier; a cooler, which is used to communicate with the condenser; and a stable reflux device, one end of which is used to communicate with the pipeline between the condenser and the cooler, and the other end is used to communicate with the bubble tower cleaning section of the waste liquid evaporator to adjust the liquid flow rate of the bubble tower cleaning section refluxed to the waste liquid evaporator so that the liquid level of the bubble tower cleaning section of the waste liquid evaporator remains stable. The embodiment of the present invention can keep the liquid level of the bubble tower cleaning section of the waste liquid evaporator stable, while avoiding safety accidents, and improving the decontamination efficiency of radioactive waste liquid.