389results about How to "Increase contact time" patented technology

The invention relates to the technical field of industrial waste gas purification, in particular to an industrial waste gas purification ecological protection device which comprises a machine body, a purification liquid cavity and a dust collection cavity are integrally formed in the middle of the machine body, an annular limiting groove is formed in the inner wall of the machine body, and an impurity temporary storage cavity is integrally formed in the bottom end of the machine body; an impurity separation assembly is arranged at the bottom of the inner side of the machine body, and the annular limiting groove is slidably connected with the driving assembly. According to the improved ecological protection device, waste gas entering the machine body is subjected to primary impurity removal through the impurity separation assembly, so that the filtering pressure of a filter screen is reduced, a cleaning piece and an impurity cleaning plate are driven to rotate, impurities in the filter screen and an impurity temporary storage cavity are cleaned, meanwhile, a driving assembly can further drive a spraying turbulent flow assembly to operate, and the cleaning effect is improved. The rising speed of the waste gas is reduced while purifying liquid is sprayed out of the industrial waste gas, the contact time of the purifying liquid and the waste gas is prolonged, and the purifying effect on the industrial waste gas is improved.

The invention relates to a water inlet separation net, a reverse osmosis membrane unit, a reverse osmosis membrane element, a filter element and a filter system in the technical field of reverse osmosis membranes. The reverse osmosis membrane unit comprises a water inlet separation net body and a reverse osmosis membrane attached to the reverse osmosis membrane element; the water inlet separation net body is provided with water blocking parts which are arranged at intervals and in a staggered mode in the extending direction of the water inlet separation net body, so that the water inlet separation net forms a water diversion flow channel which is continuously bent; and the distance between every two adjacent water blocking parts is reduced in sequence. The water diversion flow channel is designed to be bent, and the distance between every two adjacent water blocking parts is sequentially reduced, so that the flow speed of raw water is gradually increased, on the basis that the water diversion flow channel is designed to be relatively long, the flow speed of the raw water can be maintained to be gradually increased, the raw water spirally flows in the water diversion flow channel, and the flow area of the raw water is gradually reduced; the shear flow velocity of the concentrated water end is improved, and concentration polarization caused by poor water quality of the concentrated water end is weakened, so that the reverse osmosis membrane can more effectively resist pollution and blockage.

The invention provides a gas-solid fluidized bed reactor and method for photo-thermal coupling catalysis of CO2 reduction. The gas-solid fluidized bed reactor comprises a reactor main body, a gas inlet base and a heating part, a reaction cavity in the reactor main body is an inverted circular truncated cone-shaped cavity, and a quartz light window is arranged at the top of the reaction cavity; a columnar gas channel is arranged in the gas inlet base; the bottom of the reactor main body is connected with the top of the air inlet base, and a porous sieve plate is arranged between the reactor main body and the air inlet base; the bottom of the inverted circular truncated cone-shaped cavity is communicated with the top of the columnar gas channel through a porous sieve plate; the heating part is used for providing heat for the reactor main body and the air inlet base. According to the photo-thermal reactor, light blocking caused by catalyst accumulation of a traditional photo-thermal reactor is reduced, the contact area of reactant gas and the catalyst is effectively increased, and the efficiency of the catalyst is fully exerted.

The invention relates to the technical field of artificial board preparation, and particularly discloses efficient wood chip hot air drying equipment which comprises a drying cylinder and a hot air source, discs are arranged at the centers of the two end faces of the drying cylinder, a hot air guide pipe connected with the hot air source is arranged in the drying cylinder in a penetrating mode, and a hollow rotating pipe is rotatably arranged on the outer wall of the hot air guide pipe in an attached mode. A plurality of scraping plates are uniformly arranged on the hollow rotating pipe, a blanking port is formed in one end, close to the hollow rotating pipe, of each scraping plate, and a scattering plate for sealing the lower end of the blanking port is rotationally connected to the lower end, close to one end of the hollow rotating pipe, of each blanking port through a pin shaft; according to the efficient hot air drying equipment for the wood chips, the internal structure of a traditional roller drying machine is changed, the wood chips can be dried faster, the drying uniformity of all the wood chips can be improved, the drying effect of all the wood chips is guaranteed, compared with direct introduction of axial hot air, the contact time of the hot air and the wood chips can be prolonged, and the drying efficiency of the wood chips is improved. And heat energy loss in the hot air drying process is reduced.

The invention belongs to the field of tea production, and particularly relates to a conveying device for tea production and a conveying method thereof.The conveying device comprises a conveyor, a conveying box is arranged at the top of the conveyor, two supporting plates are symmetrically and fixedly connected to the bottom of the conveying box, and two guide plates are symmetrically and fixedly connected to the top of the conveying box; according to the conveying device for tea production and the conveying method of the conveying device, hot air is discharged from a plurality of first air outlets through the arranged first flow guide plate, the hot air makes better contact with tea leaves while the tea leaves are stirred through the stirring plate, the hot air is discharged from a plurality of second air outlets through the arranged second flow guide plate, and the tea leaves are better in contact with the tea leaves. Through wrapping of the gas gathering plate and the stirring plate, hot gas is prevented from floating upwards too fast, the contact time of the hot gas and the tea leaves is longer, when the stirred tea leaves slide to the included angle between the gas gathering plate and the stirring plate, the double faces of the tea leaves can be dried at the same time, and the drying effect is higher and more uniform.

The invention discloses a printing and dyeing wastewater treatment and deodorization device, and particularly relates to the technical field of wastewater treatment.The printing and dyeing wastewater treatment and deodorization device comprises a first shell, a second shell is fixedly connected to the right end of the first shell, a wastewater treatment assembly is arranged on the inner surface of the first shell, and an odor treatment assembly is arranged on the inner surface of the second shell. According to the printing and dyeing wastewater treatment and deodorization device disclosed by the invention, the filtering mechanism and the biological treatment mechanism are arranged, so that filtered impurities can be automatically cleaned in a preliminary filtering process of wastewater, and meanwhile, the wastewater flows along an S-shaped path during biological treatment, so that the wastewater can be always in a flowing state; according to the present invention, the retention time of the wastewater can be prolonged so as to prolong the contact time of the wastewater and the biological membrane, such that the microorganisms can completely degrade the organic matters in the wastewater, the treatment efficiency can be improved, the generated biological impurities can be effectively cleaned in the rotation manner, the permeability of the membrane can be maintained, and the wastewater treatment efficiency can be improved.

The invention provides a high-capacity generator circuit breaker heat dissipation structure based on liquid metal heat dissipation and a working method, and the structure comprises a vacuum arc-extinguishing chamber heat dissipation device, a liquid metal diversion pipeline, and a liquid metal cooling circulation system. The vacuum arc-extinguishing chamber heat dissipation devices are arranged on the two sides of the vacuum arc-extinguishing chamber; the end part of the liquid metal flow guide pipeline is communicated with a liquid metal cooling circulation system; the vacuum arc-extinguishing chamber heat dissipation device is internally provided with heat dissipation fins; and the liquid metal flow guide pipeline is embedded in the radiating fins. The overall heat dissipation capability of the circuit breaker is improved by introducing the liquid metal, the heat dissipation structure of the vacuum arc-extinguishing chamber timely exports heat generated by the vacuum arc-extinguishing chamber, the heat is finally exported to the outside of the circuit breaker through circular flow of the liquid metal, the steady-state temperature rise during operation of the circuit breaker can be effectively reduced, and the service life of the circuit breaker is prolonged. The method is of great significance in improving the capacity of the generator circuit breaker and ensuring safe and reliable operation of the circuit breaker.

The utility model discloses a diffusion furnace and a diffusion furnace system, and relates to the technical field of solar cell processing. The diffusion furnace comprises a furnace tube body, a quartz boat and at least one gas inlet pipe group; the quartz boat is arranged in the furnace tube body, and the quartz boat is provided with a placing position extending along a first direction; at least one gas inlet pipe set comprises a gas inlet section located in the furnace tube body, and the gas inlet section is obliquely arranged relative to the first direction. According to the diffusion furnace provided by the invention, the moving path of the process gas can be increased, the contact time of the process gas and the silicon wafer is prolonged, the process gas can fully react with the silicon wafer, and the usage amount of the process gas and the doped medium solution is reduced.

The invention belongs to the field of asphalt concrete recycling, and particularly relates to an urban construction road asphalt concrete recycling device and an operation method thereof.The urban construction road asphalt concrete recycling device comprises a tank bottom, the top of the tank bottom is provided with a tank top, and the outer wall of the tank bottom is fixedly connected with a first supporting ring; according to the urban construction road asphalt concrete recycling device and the operation method thereof, the first feeding opening is blocked through the arranged flow guide block and the flow guide plate, hot air is prevented from floating upwards too fast to be discharged out of the tank top, and through guiding of the bottom of the flow guide plate, the hot air is accumulated at the included angle between the flow guide plate and the tank top; when a motor is started, a cam is driven to rotate, a second spring is matched, a piston plate moves left and right in a reciprocating mode, hot air at the included angle of a drainage plate and the tank top is extracted and squeezed downwards, and therefore the hot air floating upwards can heat waste asphalt concrete below again, and the hot air floating upwards can be blocked through a side plate; and the contact time of the hot air and the waste asphalt concrete is prolonged.

The invention provides pH detection test paper and a preparation method and application thereof, the pH detection test paper comprises a substrate and a reagent loading layer, and the reagent loading layer is arranged on the substrate; the reagent loading layer contains a pH color developing agent and cationic organic salt. The preparation method of the pH detection test paper comprises the following steps: mixing a substrate and a solution containing a pH color developing agent, and carrying out first drying to obtain a first material; and then mixing the first material and the solution containing the cationic organic salt, and carrying out secondary drying to obtain the pH detection test paper. According to the method, the falling phenomenon of the pH color developing agent during detection can be avoided, color indication is uniform in the detection process, and the detection accuracy is high.

The invention relates to the technical field of tail gas absorption towers, in particular to a tail gas absorption tower which comprises a tail gas absorption tower body, a spraying layer and a liquid storage area are arranged in the tail gas absorption tower body, a plurality of reaction plates are arranged below the spraying layer, a plurality of reaction pieces are arranged on the reaction plates, a plurality of demisting plates are arranged above the spraying layer, and a plurality of demisting pieces are arranged on the demisting plates. Each demisting piece comprises a support, a second avoiding space is formed between each support and the corresponding demisting plate, a demisting cover is arranged at the top of each support, the center of each demisting plate is sunken downwards, a flow guide hole is formed in the center of each demisting plate, a liquid drainage head is connected to the center of the bottom end of the lowermost demisting plate, and the top end of the liquid drainage head is communicated with the flow guide hole of the upper demisting plate. Therefore, the contact time of the purification liquid and the tail gas can be prolonged, the purification effect is improved, liquid drops in the purified gas are effectively removed, and the purification effect is improved.

The utility model discloses a roller washing machine. The roller washing machine comprises a box body; the outer cylinder is arranged in the box body; the inner barrel is rotationally arranged in the outer barrel, a water containing cavity for containing washing water is formed between the outer bottom of the inner barrel and the inner bottom of the outer barrel, and the water containing cavity is communicated with the interior of the inner barrel; the annular shell is arranged in the water containing cavity and fixedly connected with the outer bottom of the inner barrel, the annular shell extends along the edge of the outer bottom of the inner barrel, an annular cavity is formed in the annular shell, a plurality of water leakage holes are formed in the annular shell at intervals in the circumferential direction of the annular shell, and the annular cavity communicates with the water containing cavity through the water leakage holes; and a movable improvement object is accommodated in the annular cavity. The roller washing machine can prolong the contact time of the improved object and the washing water and improve the washing effect.

The invention relates to the technical field of zinc oxide preparation, and particularly discloses a waste heat utilization device for preparing zinc oxide by a dry method, the waste heat utilization device comprises a thermal insulation outer cylinder and a settling cylinder, the lower end of the settling cylinder is connected with a V-shaped connecting pipe, and the other end of the connecting pipe is connected with a vertically upward settling pipe; a plurality of fan-shaped columnar heat storage boxes are rotationally arranged on the outer wall of the settling cylinder in the heat preservation outer cylinder, each heat storage box is filled with a phase change heat storage material, and a plurality of heat exchange pipes vertically penetrate through the heat storage boxes; compared with traditional waste heat recovery equipment, the device has the advantages that high-temperature flue gas is recovered on line and can be released and utilized at any time, zinc oxide powder in the high-temperature flue gas can be settled through the two vertical flue gas movement processes of the heat exchange pipe and the settling barrel, and the zinc oxide powder in the high-temperature flue gas can be recycled at any time. The problems of waste heat recovery and powder sedimentation of existing zinc oxide high-temperature flue gas are effectively solved.

The utility model discloses toxic and harmful gas treatment and purification equipment which comprises a shell and a flow guide mechanism, connecting plates are arranged at openings in the left end and the right end of the shell, hollow-square-shaped frame plates are placed in the shell, velvet spraying cloth is arranged at the upper end and the lower end of each hollow-square-shaped frame plate, and activated carbon particles are placed between the two pieces of velvet spraying cloth in the same hollow-square-shaped frame plate; the flow guide mechanism comprises first baffles, air inlet holes and air outlet holes, the first baffles are arranged at the left end and the right end of the shell respectively, the air inlet holes are formed in the surface of the first baffle on the left side, and the air outlet holes are formed in the surface of the first baffle on the right side. The contact time of the adsorption material and the poisonous and harmful gas is prolonged, the purification effect of the poisonous and harmful gas treatment equipment is improved, the poisonous and harmful gas evenly makes contact with all parts of the adsorption material, and the adsorption and purification material is fully utilized.

The invention relates to the technical field of welding, in particular to a reinforcement cage seam welder which comprises a main reinforcement guide plate and a welding head which are assembled on a seam welder body, a rotating ring is mounted on the front side of the main reinforcement guide plate, and a guide rod is mounted on the front side of the rotating ring; the front side of the rotating ring is connected with a mounting seat, the front side of the mounting seat is slidably connected with a moving rod, a first tension spring is arranged between the mounting seat and the moving rod, the front end of the moving rod is connected with a sliding rod, the sliding rod is provided with a sliding groove, the sliding groove is composed of a first groove body and a second groove body, the first groove body extends in the circumferential direction of the reinforcement cage, and the top end of the second groove body communicates with the bottom end of the first groove body; and one end of the welding head is inserted into the sliding groove in a sliding mode. The welding head can be quickly positioned to the joint, the positioning efficiency is improved, the contact time of the welding head and the joint is prolonged, welding is firmer, the device operates continuously, and the situation that the device is seriously abraded due to frequent shutdown and starting is reduced.

The invention relates to preparation and application of copper-sulfur group nano hydrogel. The research successfully synthesizes a copper-sulfur group nano-composite system with higher stability, the nano-system is utilized to perform experimental verification in vivo and in vitro, the application of the nano-system in the field of bladder cancer treatment is explored, a new strategy is provided for dealing with the limitation of current bladder cancer treatment, the Cu2-xSe (at) PDA (at) BTZ nano-material is prepared by utilizing a one-pot method, and the application of the nano-system in the bladder cancer treatment field is expanded. The surface of Cu2-xSe is modified through PDA, Cu2-xSe is wrapped in the PDA, bortezomib (BTZ) can be connected with the PDA through a phenylboronic acid ester bond, meanwhile, PDA of a coating layer of the composite material can be crosslinked with four-arm-polyethylene glycol-sulfydryl (4ARM-PEG-SH) to form nano hydrogel, the residence time of a medicine in the bladder can be prolonged through a copper-sulfur group nano-composite nano material, and the medicine can be applied to the bladder treatment. The contact time of the bladder mucosa and the medicine is prolonged, the medicine slow release effect is achieved, and efficient utilization of the medicine is achieved.

The invention discloses an air-lift integrated device based on an anaerobic ammonia oxidation process, and relates to the technical field of sewage treatment, the air-lift integrated device comprises a reaction container, the top of the reaction container is provided with a top cover, a stirring mechanism is arranged above the top cover, and the outer surface of the reaction container is fixedly provided with a water pump 1. By arranging the aeration assembly, gas can escape in the form of tiny bubbles, the gas-liquid contact area is greatly increased, by arranging the stirring mechanism, the bubbles generated by the aeration assembly can be further crushed and dispersed, meanwhile, the bubbles can be guided to spirally rise in the reaction container, and the gas-liquid separation effect is improved. The aeration assembly and the stirring mechanism are matched for use, so that the contact time of bubbles and liquid can be remarkably prolonged, the oxygen transmission efficiency is greatly improved, anaerobic ammonia oxidizing bacteria can take in oxygen more sufficiently to react with a substrate, and the sewage denitrification treatment efficiency and quality can be effectively improved; and the treated sewage is ensured to be stably discharged up to the standard.

The utility model belongs to the technical field of plastic particle processing, and particularly relates to a plastic granulator drying device which comprises a drying box, the bottom end of the drying box is conical, a feeding pipe is fixedly connected to the top end of the drying box, a material guide plate is fixedly connected to the inner wall of the drying box, the section of the material guide plate is L-shaped, and a feeding assembly is arranged at the top of the drying box. A round shell is fixedly connected to the position, close to the bottom end, of the inner wall of the drying box, a heating pipe is fixedly connected to the inner wall of the round shell, a plurality of through holes are formed in the side wall of the round shell, an air circulation assembly is arranged on the side wall of the drying box, and a support is fixedly connected to the bottom of the drying box. According to the plastic particle drying device, the contact time of plastic particles and hot air flow can be prolonged, the plastic particles roll in the falling process, the heating surface of the plastic particles can be increased, and the drying efficiency of the plastic particles is improved.

The invention relates to a corrosion-resistant toughened PVC (polyvinyl chloride) pipe as well as a preparation device and a preparation process thereof. The device comprises an extruder, a cooling water tank and a cooling cylinder, and a water storage mechanism and a spraying mechanism are arranged on the cooling cylinder; the water storage mechanism comprises a water storage sleeve, and a water storage cavity is formed between the water storage sleeve and the outer wall of the to-be-cooled pipe; the rotating seat is coaxially and rotatably mounted in the cooling cylinder, and the water storage sleeve is mounted on the rotating seat; the water storage sponge is annular and is mounted at one end, far away from the spraying mechanism, of the water storage sleeve; the driving assembly is used for driving the rotating seat to rotate on the cooling cylinder; the spraying mechanism comprises a spraying pipe communicated with an external high-pressure water source; and the multiple nozzles are distributed on the spraying pipe at equal intervals, and the spraying directions of the nozzles point to the water storage cavity. Cooling water is sprayed into the water storage cavity through the nozzles and forms the cooling water jacket along with rotation of the water storage jacket, the contact duration of the cooling water and the pipe is prolonged, the cooling effect of the cooling water on the pipe to be cooled is improved, and the use amount of the cooling water is reduced.

The utility model relates to the technical field of PU synthetic leather production lines, and discloses a washing device of a PU synthetic leather wet process production line, which comprises a working table, a movable groove is arranged at the center of the working table, a T-shaped groove is arranged on the bottom wall of the movable groove, a T-shaped convex block is connected inside the T-shaped groove in a sliding mode, and the T-shaped convex block is connected with the working table in a sliding mode. The top of the T-shaped protruding block is fixedly connected with a cleaning box, the side wall of the cleaning box is rotationally connected with an inner roller shaft, the surface of the inner roller shaft is slidably connected with an outer roller shaft, the surface of the outer roller shaft is sleeved with a leather belt, and the right side of the top of the workbench is fixedly connected with a collecting box. The left side of the top of the workbench is fixedly connected with a first stand column. According to the washing device of the PU synthetic leather wet production line, the shaking mechanism is arranged, rapid reciprocating movement of the ejector rod is achieved, and therefore high-frequency vibration of clean water in the cleaning box is achieved, the surface impact and contact duration of the clean water and a leather belt is prolonged, and the cleaning effect is improved.

The utility model discloses a cooling and conveying device for die castings, which comprises a frame, and a plurality of conveying rollers are rotatably mounted on the frame and used for conveying the die castings. A top frame is installed on the top of the rack, and a plurality of air cooling devices are installed on the top frame and used for air cooling of die castings. A water cooling device is installed on the rack and used for conducting water cooling on the conveying rollers. The water cooling device comprises a water tank and a cooling pipe, a water inlet of the water pump is connected with the water tank through a pipeline, a water outlet of the water pump is connected with the cooling pipe, the cooling pipe is arranged in the machine frame in an S-shaped surrounding mode and makes contact with the bottoms of the conveying rollers, and the tail end of the cooling pipe extends into the water tank. According to the cooling and conveying device for the die castings, the problems that an existing cooling and conveying device is low in single air cooling efficiency, the castings cannot make full contact with a cold source in the conveying process, and therefore heat on the surfaces of the castings cannot be taken away in time are solved.

The invention relates to the field of production of LED supports, in particular to a die for preparing an LED support, a plurality of edge grooves extend outwards from a hollow area on a material belt, a die core comprises a plurality of positioning convex blocks, the positioning convex blocks are located in the edge grooves, and a fixing mechanism for positioning the material belt is formed by combining the plurality of positioning convex blocks to abut against one side in the edge grooves. A flow channel for injection molding fluid to pass through is reserved between the positioning convex block and the interior of the edge groove; the central area of the hollow area corresponds to the liquid injection port of the injection molding machine, and the positioning convex block is positioned in the edge groove extending outwards in the hollow area, so that the impact of injection molding fluid can be relieved, the contact time of the injection molding fluid and the positioning convex block is delayed, and the collision stroke of the injection molding fluid and the positioning convex block is prolonged; by means of the structure, injection molding fluid can make contact with the positioning protruding block only after the flowing speed of the injection molding fluid is decreased, impact force generated by the injection molding fluid on the positioning protruding block can greatly slide down, and damage to the positioning protruding block is smaller.

The invention discloses an injection molding device for processing a DC brushless cooling fan. The invention relates to the technical field of injection molding devices, and includes a frame, an injection molding mechanism, and a heat preservation component. The injection molding mechanism includes a linear guide rail, an injection molding main machine is slidably installed on the top of the linear guide rail, a servo motor is installed on the outer surface of the injection molding main machine and near the hydraulic cylinder, an injection molding cylinder is installed at one end of the injection molding main machine away from the servo motor, a spiral blade is rotatably installed in the middle of the inner cavity of the injection molding cylinder, a conical guide bucket is fixedly installed at the edge of the spiral surface of the spiral blade and near the position of the injection molding main machine, and the heat preservation component includes a heat preservation cylinder, a first annular tube is installed in the inner cavity of the heat preservation cylinder and near the discharge end of the injection molding cylinder, and a second annular tube is installed in the inner cavity of the heat preservation cylinder and at one end away from the first annular tube. The injection molding device for processing a DC brushless cooling fan achieves the effect of preventing material pulling, guides the granular material, is not easy to get stuck, and is heat-insulated, which is safe and reliable.

The invention provides a method and a system for continuously extracting and washing a crude benzomelamine product. The method comprises the following steps: mixing a crude product solid of benzotripolycyanamide with water to prepare slurry capable of continuously flowing, and continuously feeding in a fluid form; enabling the slurry to be in countercurrent contact with washing water in the turntable extraction tower so as to realize continuous extraction and washing of the crude product of the benzotripolycyanamide; meanwhile, the spiral conveyor is additionally arranged at the bottom of the turntable extraction tower, so that washed benzotripolycyanamide solids can be conveniently settled to the lower part of the turntable extraction tower so as to realize continuous discharging and further to be dried. Compared with traditional intermittent cross-flow washing, the method has the advantages that continuous extraction and washing of crude benzomelamine product solids can be achieved, washing efficiency is improved, washing water is saved, impurities such as benzamide and potassium hydroxide remaining in benzomelamine can be efficiently removed, the ash content and the free alkali content of the product are reduced, and the method is suitable for industrial production. And the purity of the benzotripolycyanamide product is improved.

The invention discloses intelligent constant impurity gas purification equipment and method, and belongs to the field of gas filtration, the intelligent constant impurity gas purification equipment comprises a base, two supporting columns are fixed to the upper surface of the base, a filtering mechanism is fixed to the tops of the two supporting columns, a positioning mechanism is arranged on the outer surface of the filtering mechanism, and a first supporting plate is fixed to the right side of the upper surface of the base; a first motor is fixed to the left side of the first supporting plate, a first gear is fixed to the left end of an output shaft of the first motor, second gears are connected to the front end and the rear end of the first gear in an engaged mode, and second supporting plates are rotationally connected to the right side of the rear second gear and the left side of the front second gear. By adopting the design that the filter cloth is spirally wound on the outer surface of the filter cartridge and combining the spiral groove and the air passage on the filter cartridge, the filter area is greatly increased, the contact time of air and the filter cloth is greatly prolonged, and the filter efficiency is effectively improved; and by controlling the operation power of the fan, the constant purification effect can be accurately realized.

The utility model relates to the field of kitchen stoves, and particularly discloses a pot support and a stove. The pot support comprises a hollow energy gathering ring; the energy gathering ring comprises an outer peripheral wall and an inner peripheral wall, the outer peripheral wall comprises an upper portion, and the upper portion extends towards the outer peripheral side and the lower portion of the energy gathering ring. The upper part of the outer peripheral wall of the energy-gathering ring of the pot bracket inclines towards the outer peripheral side, so that the overflow liquid is guided to flow towards the outer peripheral side of the pot bracket instead of flowing towards the inner peripheral side of the pot bracket, and the overflow liquid is prevented from flowing to a burner, so that flames are extinguished and are not easy to clean. Meanwhile, when the cookware is placed on the pot bracket, an expansion part is formed between the upper part of the outer peripheral wall of the energy-gathering ring of the pot bracket and the bottom of the cookware, so that the flow speed of high-temperature flue gas exhausted from the smoke outlet is slowed down, the contact time of the high-temperature flue gas and the cookware is prolonged, and the heat efficiency of the cooker is improved.

The present invention relates to the technical field of heat exchangers, and proposes a corrosion-resistant shell-and-tube heat exchanger, including a shell, a plurality of heat exchange tubes and a baffle, wherein the shell has a working space, the plurality of heat exchange tubes are arranged in the working space, and the baffles are arranged in a staggered interval in the working space to form a water flow channel, and further comprising: a circular tube, wherein there are a plurality of circular tubes, and the plurality of circular tubes are all arranged through the baffle, and the circular tubes have spiral flow channels, and the two ends of the spiral flow channels are respectively connected to the water flow channels on both sides of the baffle; and a bending plate, wherein there are a plurality of bending plates, and the plurality of bending plates are arranged at intervals on the baffle, and after the water flow enters the water flow channel, it is blocked by the bending plate to form turbulence. Through the above technical scheme, the problems of reduced heat exchange efficiency and unsatisfactory corrosion resistance treatment of the shell-and-tube heat exchanger existing in the related art are solved.

The application discloses a micro-bubble stripping device and application thereof in ammonia-nitrogen wastewater treatment. The device comprises a micro-bubble dispersion device, an absorption device and a gas-liquid separation device which are connected by pipelines in sequence. The micro-bubble dispersion device is filled with Janus hollow fiber membranes. The inner diameter of the Janus hollow fiber membranes is 0.1-2.0 mm, the wall thickness is 0.05-0.6 mm, the pore size is 0.05-2.0 um, the water contact angle of the hydrophilic layer is less than 65 DEG, and the water contact angle of the hydrophobic layer is greater than 110 DEG. Air is dispersed into micro-bubbles and contacted with ammonia-nitrogen wastewater. The micro-bubbles have the advantages of large specific surface area, high mass transfer efficiency and long gas-liquid contact time, so that the mass transfer of ammonia-nitrogen in water to gas phase is strengthened, the gas-liquid ratio is reduced, the energy consumption in the stripping process is reduced, and the equipment investment and operation cost in the stripping process are reduced.

This application relates to a cleaning structure for a range hood, including a main body with an air duct system. The air duct system includes a volute, a nozzle, an impeller, and a guide ring. The nozzle is mounted on the guide ring of the volute. A water pump and a gas generating device are installed on the back panel of the main body. The gas generating device has two electrodes. When the water pump operates, it draws liquid and delivers it to the inlet of the gas generating device. The two electrodes continuously generate hydrogen and oxygen, which dissolve in water to form nano-bubble water. The outlet of the gas generating device is connected to the nozzle, which has a spray pipe parallel to the impeller and with its outlet direction aligned with the center of the impeller. This solution, by generating nano-bubble water, immerses the impeller in liquid for an extended period, maximizing the cleaning effect of the nano-bubble water.

The present application relates to the technical field of catalyst regeneration, in particular to a gas-solid countercurrent enhanced stripping device for catalyst regeneration, comprising: a mounting frame and an inclined plate assembly. The inclined plate assembly is arranged inside the mounting frame, used for guiding the flow of catalyst particles and capable of prolonging the contact time of catalyst particles with water vapor. Further, when the catalyst particles impact the inclined plate assembly under the action of gravity, the inclined plate assembly can absorb kinetic energy through its elastic deformation, converting rigid collision into cushioned contact. Therefore, on the one hand, the impact force of the catalyst particles on the inclined plate assembly is reduced, which not only slows down the wear of the catalyst particles themselves, but also avoids the abrasion of the inclined plate assembly; on the other hand, the slight vibration induced by elastic deformation can disturb the flow state of the catalyst particles, promoting them to spread evenly on the inclined plate assembly, thereby improving the contact efficiency between the catalyst particles and water vapor and further improving the stripping efficiency.