525 results about "Mixed flow" patented technology

The invention discloses a quantitative recognition device for the number and size of bubbles at a rotating impeller of a multiphase pump. The quantitative recognition device comprises a two-phase flow experiment system, the multiphase pump, a high-speed camera, a light source and the like. The preprocessing and data analysis system and the deep learning system are arranged in the computer; the two-phase flow experiment system and the image acquisition system are electrically connected with the computer through lines. The invention further discloses a quantitative recognition method for the number and size of the bubbles at the rotating impeller of the multiphase pump. According to the method, the problems of low blistering recognition precision, low efficiency and large error caused by the existing manual measurement method are solved, and a reference method is provided for exploring the influence of gas distribution at the impeller in the multiphase pump on pump operation and optimizing design of the multiphase pump.

The invention relates to the technical field of nitrogen and oxygen mixed flow, and discloses a large-flow high-precision nitrogen and oxygen mixed flow system. The system comprises a gas attribute feature library construction module for periodically collecting historical component data to generate a feature library containing flow and concentration reference values; the real-time gas component monitoring module is used for acquiring the real-time component concentration and flow value of the current nitrogen and oxygen; the mixed flow deviation analysis module is used for generating a component deviation matrix according to the reference value and the real-time value; the dynamic parameter optimization module retrieves the matched flow fluctuation data set, and when the dispersion exceeds a threshold value, the proportion of the total duration from the historical start to the current moment is calculated to serve as the gas compensation proportion; and the mixed flow execution control module is used for adjusting input proportioning parameters of nitrogen and oxygen from a historical starting moment based on the compensation proportion. According to the system, all the modules work cooperatively, and high-precision mixing of nitrogen and oxygen under large flow is achieved.

The invention provides a mixed flow velocity and flow measuring device and method, and particularly relates to the technical field of measuring instruments, and the device comprises a gas mixing assembly, a flow field optimization assembly, a flow velocity sensing assembly and a signal processing assembly. The gas mixing assembly comprises a differential channel mixer and a mixing cavity, and gas premixing is achieved. The flow field optimization assembly comprises a plurality of air duct partition plates and straight pipe sections, and the mixed gas conveying pipeline is divided into a plurality of independent divided air ducts; the flow velocity sensing assembly comprises a rectification assembly and a pressure sensing assembly, the rectification assembly comprises a pore plate and / or a grid, and the pressure sensing assembly comprises a plurality of uniformly distributed pressure sensing elements; the signal processing assembly comprises a differential pressure sensing transmitter, a static pressure sensing transmitter, a temperature sensing transmitter, an atmospheric pressure sensing transmitter and a data processing module. The pressure sensing element detects differential pressure signals, the differential pressure sensing transmitter converts the signals, the data processing module calculates the average flow velocity and flow of the mixed gas based on the signals and measurement data, and the measurement precision and accuracy are improved.

The utility model belongs to the technical field of reactors, and particularly relates to a multiphase unpowered reactor, which comprises a vertical shell, an upper reaction area and a lower liquid collection area are arranged in the shell, and the reaction area is communicated with the liquid collection area through a cap hood, and is characterized in that an annular pipe is arranged in the middle of the reaction area and is connected with a feed port of the shell through a feed pipe; a plurality of horizontal circulating hydraulic sprayers are arranged on the annular pipe, and the axis of at least one horizontal circulating hydraulic sprayer is tangential to the outer side of the annular pipe; a cross pipe is arranged at the lower part of the reaction area; a plurality of vertical circulating hydraulic sprayers are arranged on the cross pipe; and the horizontal circulating hydraulic spray head and the vertical circulating hydraulic spray head are venturi mixed flow spray heads. The utility model has the beneficial effects that the middle section and the lower section of the reaction area of the shell adopt two sections of liquid-phase hydraulic sprayers to be combined with the atomizing sprayers at the top of the reaction area to respectively form liquid flow in the vertical direction and the horizontal direction, so that the mixing effect of gas-phase, liquid-phase and solid-phase substances is enhanced, and the conversion efficiency is improved.

The application discloses a kind of purification devices for diphenylamine production, it is related to chemical purification technical field, including purification tank body, stirring mixing assembly and lifting mixed flow component are equipped in the purification tank body, stirring mixing assembly and lifting mixed flow component are jointly connected comprehensive drive component;The lifting mixed flow component includes multiple dispersion pipes arranged in the purification tank body, multiple dispersion pipes are evenly distributed in the circumferential of purification tank body, lifting column is slidably connected in each dispersion pipe, the top end of lifting column is fixedly connected with traction rope, the diphenylamine solution in the purification tank body can be mixed as a whole by being equipped with stirring mixing assembly, the diphenylamine solution can be fine flow mixing by being equipped with lifting mixed flow component using pressure-driven mode, stirring mixing assembly and lifting mixed flow component are jointly used to effectively ensure that the diphenylamine solution in the purification tank body is efficiently mixed, so that diphenylamine is more efficiently purified, and the use effect is good.

The utility model discloses a low-noise mixed flow fan in the technical field of fans, which comprises a shell, the shell is provided with an air inlet and an air outlet, the shell is cylindrical, a motor is arranged in the shell, an output rotating shaft of the motor faces the air inlet and coincides with the axis of the shell, and the output rotating shaft of the motor is provided with a backward-tilting centrifugal impeller. A partition plate is arranged in the machine shell and divides the inner space of the machine shell into a first cavity and a second cavity, the motor is arranged in the second cavity, an output rotating shaft of the motor penetrates out of the partition plate to enter the first cavity, the backward-tilting centrifugal impeller is arranged in the first cavity, and the size of the backward-tilting centrifugal impeller is matched with the size of the first cavity. An air guide groove parallel to the axis of the machine shell is formed in the side, away from the second cavity, of the partition plate, the end, close to the partition plate, of the air guide groove communicates with the first cavity, and the peripheral side of the air guide groove is isolated from the second cavity. The mixed flow fan structure is designed by combining the shapes of the centrifugal fan impeller and the axial flow fan, the shell structure is effectively utilized, and both the air volume and the air pressure performance are considered.

The invention discloses a multi-target optimization scheduling method and system for multi-stage mixed flow automobile production and a medium. The method comprises the following steps: obtaining automobile production order data and automobile production line data; distributing the automobile production order data to the automobile production line data on the basis of an improved NSGA-II algorithm in combination with a heuristic sorting strategy and a guide rule strategy, and generating an initial ranking sequence population; and performing iterative crossover mutation operation on the initial scheduling sequence population based on an improved NSGA-II algorithm according to a multi-target fitness evaluation result, performing automobile production scheduling optimization on each generation of crossover mutation result based on a production constraint repair mechanism, and generating a final automobile production scheduling sequence until an iteration termination condition is met. Therefore, the method can adapt to the actual production constraint of an enterprise so as to meet the requirements of order on-time delivery, resource utilization rate maximization and remodeling cost minimization.

The invention discloses a wastewater treatment system based on municipal engineering, and relates to the technical field of wastewater treatment. The suction part close to the bottom of the tank body reaction tank is arranged below the flow mixing box, the suction runner is used for lifting a wastewater mixture at the bottom of the tank body reaction tank into the flow mixing box, the backflow part is used for conveying the aerated wastewater mixture into the tank body reaction tank, and the backflow runner is slidably arranged in the corresponding suction runner in a sleeving manner. The jet flow assembly is communicated with the backflow flow channels on the two sides of the jet flow assembly, and the jet flow assembly is used for jetting the wastewater mixture in the backflow flow channels into the tank body reaction tank in a jet flow mode. According to the invention, by controlling the lifting motion of the support ring and the conducting pipe among different jet flow point positions, sludge mixed wastewater at the bottom of the pool can be pumped out and conveyed and dispersed into the wastewater at the different jet flow point positions, so that oxygen-mixed activated sludge can be fully diffused in the wastewater to improve the pollutant degradation effect.

The invention provides a portable bladeless fan which comprises a shell, a first air inlet part is arranged on the rear side of the shell, a first air outlet part is arranged on the front side of the shell, and the first air inlet part and the first air outlet part are communicated in the shell; the pressurizing piece is connected with the front side of the shell, the pressurizing piece comprises an end face arranged forwards, the axial upper end face is located behind the first air outlet part, and a first matching structure is arranged on the end face; the mixed flow fan is located in the shell and connected to the rear side of the pressurizing piece, and the mixed flow fan rotates around a rotating shaft to generate airflow; the fixing piece is used for fixing the portable bladeless fan to an external object and comprises a second matching structure, and the second matching structure is matched with the first matching structure so that the fixing piece can be detachably fixed to the end face; a pressurization flow guide channel is formed between the mixed flow fan and the shell and between the pressurization piece and the shell, and air enters the pressurization flow guide channel from the first air inlet part, forms pressurization mixed flow in the pressurization flow guide channel and then is exhausted from the first air outlet part.

The utility model relates to the technical field of steam power generation turbines, in particular to a mixed flow type saturated steam power generation turbine which comprises a cylinder, the cylinder comprises a vertical inlet cavity and a horizontal outlet cavity which are communicated, and reinforcing ribs are arranged at the positions, corresponding to the joint of the two cavities, of the inner wall of the cylinder. A protruding structure at the bottom of the side, away from the horizontal outlet cavity, of the outer wall of the air cylinder is fixedly connected with a gearbox. The stationary blade assembly comprises a first-stage radial flow stationary blade fixedly arranged on the inner wall of the vertical inlet cavity and a second-stage axial flow stationary blade fixedly arranged on the reinforcing ribs; the rotor assembly comprises a rotating part connected with the high-speed shaft of the gear box, a first-stage radial flow vane impeller and a second-stage axial flow vane impeller, wherein the periphery of the rotating part is sleeved with the first-stage radial flow vane impeller and the second-stage axial flow vane impeller. The radial flow turbine and the axial flow turbine are combined to form the mixed-flow turbine, so that the working capacity of a single cylinder is improved, the power generation efficiency is improved, the cost is saved, and the unit size is reduced.

Crushing and feeding equipment and deep-sea mining and transport system [Solution] The crushing and feeding device of the present invention includes a main body and a hydraulic motor, the main body having at least one roller inside, the roller fitted onto a corresponding roller shaft, the roller shaft rotatably connected to the main body, at least three identical disc blades spaced equally apart in the axial direction of the roller, each disc blade having at least one cutting edge, plugs provided on both the front and rear vertical surfaces of the main body, the plugs fitting into the gap from the roller to the vertical surface of the main body, and the power output shaft of the hydraulic motor connected to the roller shaft. The deep-sea mining and conveying system of the present invention includes a relay station, a mixed-flow pump, a lifting pipe, and a mother ship, the relay station including a supply barrel, a supply pipe, and the crushing and feeding device connected in order from top to bottom, the lower opening of the supply pipe connected to the lifting pipe.

The application provides a rotary impingement oblique flow centrifugal combined compressor and application thereof, and belongs to the technical field of turbine engines, and comprises an outer casing structure, an inner casing structure, a working mechanism and a diffuser mechanism, the outer casing structure and the inner casing structure are rotary bodies, the inner casing structure is located inside the outer casing structure, the inner casing structure and the outer casing structure form a working cavity, the working mechanism is installed in the working cavity and is used for pressurizing airflow. Compared with the compression mode of a conventional combined compressor, the application draws lessons from the pressurization mode of a supersonic inlet, and the Mach number of airflow relative to a rotating impeller reaches 2 or more through high-speed rotation; at this time, a series of weak oblique shock waves are constructed through the contraction of a passage, and a high-efficiency compression system is obtained through the pressurization of the shock wave system, the single-stage pressure ratio of the high-efficiency compression system is much higher than that of a conventional compressor, and the application has the advantages of compact structure, simple processing and long service life.

The invention discloses a ship pipe fitting workshop scheduling method, system, equipment and medium based on a large model assisted evolutionary algorithm, and relates to the technical field of ship pipe fitting workshop production operation, and the specific steps are as follows: establishing a hybrid flow workshop scheduling model, adopting a multi-dimensional coding and decoding structure to code a workshop scheduling scheme, generating an initial population, and establishing a hybrid flow workshop scheduling model; and guiding the individuals to carry out iterative evolution by using a search operator sequence generated by the large model based on a historical evolution effect or a randomly generated search operator sequence, and outputting an optimal scheduling scheme with the shortest completion time. According to the method, modeling and solving of a multi-resource collaborative complex scheduling problem are realized, and the problem of insufficient scheduling scheme quality caused by neglect of transportation processing coupling or low algorithm search efficiency in an existing method is solved. By introducing a large-model intelligent guiding mechanism, the evolutionary process has adaptive optimization ability, and the feasibility of a scheduling scheme is ensured through a complete coding and decoding framework.

The invention relates to a support-adjustable chassis lifting appliance and a chassis lifting appliance switching station, and belongs to the technical field of automobile production line conveying systems. The front supporting mechanism comprises a positioning seat fixed on the hanging bracket and a positioning pin rotating seat clamped and matched with the positioning seat, and an elastic resetting piece used for resetting and clamping the positioning pin rotating seat to the positioning seat is arranged in the positioning seat; the rear supporting mechanism comprises a guide shaft arranged on the hanging bracket and a supporting seat which is in sliding and rotating connection with the guide shaft, a positioning structure is arranged between the supporting seat and the hanging bracket, and the supporting seat rotates around the guide shaft to be combined with or separated from the positioning structure. Through switching of multiple positions of the positioning pin and the supporting seat, the requirements of vehicle body sizes of different vehicle models and the requirement of space avoidance in the new energy vehicle model combination process can be met, multi-platform and multi-vehicle model mixed flow production is met, and the mixed flow adaptation capacity of the lifting appliance is effectively improved.

The present application relates to the field of gas-liquid mixing, and provides a bubble generator and an ozone aerator, wherein the bubble generator comprises an inlet connecting end, an outlet connecting end and a throttler assembly, the inlet of the throttler assembly is detachably connected with the inlet connecting end, the outlet of the throttler assembly is detachably connected with the outlet connecting end, the throttler assembly comprises at least two groups of throttling holes and mixing chambers, and the throttling holes and the mixing chambers are alternately arranged in the direction from the inlet connecting end to the outlet connecting end; the inner diameter of the throttling hole continuously decreases. The present application solves the low aeration efficiency in the prior art, the gas-liquid mixed flow enters the throttler assembly with multiple groups of throttling holes and mixing chambers through the inlet connecting end, the inner diameter of the multiple groups of throttling holes decreases in sequence to carry out multiple times of pressurization, gas dissolution and pressure reduction, and smaller bubbles such as nanoscale bubbles are obtained, the diameter of the generated bubbles is adjusted by arranging different groups of throttling holes and mixing chambers, and the adding efficiency of ozone and other gases is improved, and energy consumption is reduced.

The invention provides a liquid spraying type mixing and heating device, and relates to the technical field of heat exchange equipment, the liquid spraying type mixing and heating device comprises a shell, a first liquid inlet pipe and a second liquid inlet pipe, the shell is provided with a first-stage mixing flow channel and a second-stage mixing flow channel which are arranged in the first direction and communicate with each other, and the first-stage mixing flow channel and the second-stage mixing flow channel extend in the first direction; the first-stage mixing flow channel is of a Venturi structure, a liquid outlet is formed in the end, away from the first-stage mixing flow channel, of the second-stage mixing flow channel, and the cross sectional area of the second-stage mixing flow channel is gradually increased in the direction from the first-stage mixing flow channel to the liquid outlet; the first liquid inlet pipe and the second liquid inlet pipe are both communicated with the first-stage mixing flow channel, the first liquid inlet pipe is used for introducing a liquid medium to be heated into the first-stage mixing flow channel, and the second liquid inlet pipe is used for introducing a high-temperature liquid medium into the first-stage mixing flow channel. The high-temperature liquid medium is adopted to heat the to-be-heated liquid medium, the influence of the bubble blasting phenomenon on the heating device can be effectively avoided, and the service life is ensured.

The application belongs to the technical field of heat supply equipment, and provides a regional heat supply mixing tank based on turbulence structure optimization, which comprises a first turbulence component and a second turbulence component arranged in a tank body along a water flow direction; the first turbulence component is located behind a low-temperature water inlet and behind a high-temperature water inlet, and is used for blocking the channel of cold water sticking to the bottom and actively inducing to the middle or upper part of the tank body; the second turbulence component is located in front of a medium-temperature water outlet, and is used for forcibly turning and cutting the mixed fluid about to flow out, so as to realize the thermal deviation homogenization of the mixed fluid. The mixing tank is used for hydraulic decoupling and heat mixing of a primary circuit and a secondary circuit of a heat network, and the internal turbulence structure is additionally arranged and optimized to eliminate the thermal stratification phenomenon in the tank, and then the temperature uniformity of the water outlet is improved.

The impeller device comprises a hub, a plurality of axial flow blades, a plurality of mixed flow blades and a fixed impeller, and the hub can rotate with the axis as the center axis; the axial flow blades are installed on the periphery of the hub in a surrounding mode. Each flow mixing blade is mounted on the upper surface of the hub, and a plurality of flow mixing blades are arranged around the central shaft to form a flow mixing blade group; the fixed impeller is close to the upper surface of the hub and is coaxial with the hub, and the fixed impeller is arranged on the periphery of the mixed flow blade set so that corresponding flow channels can be formed among the mixed flow blades, the fixed impeller and the axial flow blades. According to the impeller device and the gas compressor, rotation of the mixed-flow blades provides remarkable pressure rise, rotation of the axial-flow blades provides large-flow loads, a wider efficient operation range, higher single-stage pressure rise and more stable flowing are achieved, the fixed impeller breaks off fluid with a strong rotation component (circumferential speed) to be straight, the fluid flows into a next-stage flow channel, and the flow of the fluid flows into the next-stage flow channel. A flow field is stabilized, and vibration and noise are reduced.

The utility model belongs to the technical field of special-shaped flow mixers, and particularly relates to an efficient special-shaped flow mixer which comprises a shell, a plurality of pipelines, a fixing frame and a filter screen and further comprises a channel, the channel is formed in the shell, the pipelines are all fixedly installed at one end of the shell, the fixing frame is installed in the channel in an inserted mode, and the filter screen is fixedly installed in the fixing frame. Two guide plates are mounted in the channel in a sliding manner; the two threaded rods are rotationally installed in the channel and located below the two guide plates correspondingly, the upper ends of the two threaded rods extend into the two guide plates correspondingly, and the two threaded rods are in threaded connection with the two guide plates correspondingly; the fixing assembly is located in the shell and used for fixing the position of the fixing frame; the flue gas is fully and efficiently mixed in the moving process through the bent path, meanwhile, the path can be adjusted according to the flue gas condition, the application range is wide, meanwhile, a worker can conveniently clean the filter screen, and tools are not needed.

The present application belongs to the technical field of Venturi tube, and particularly relates to a low-temperature plasma wastewater treatment method based on a Venturi tube and a Venturi tube discharge plasma device. The device comprises a Venturi tube, which comprises an inlet section, a throat connected to the inlet section, and a diffusion section connected to the throat. A feed inlet is arranged at the inlet of the inlet section, a discharge outlet is arranged at the outlet of the diffusion section, and a negative pressure port is arranged at the connection between the inlet section and the throat. The Venturi tube discharge plasma device further comprises an electrode connected to an excitation power source. The method is applied in the device, gas and wastewater are mixed in the device, and wastewater is treated by a plasma and micro-bubble mixed flow after the device is turned on. The mixing mode of the gas and the wastewater in the device has two modes. The device and the method have high practicability and high removal efficiency for organic pollutants in wastewater.

The invention belongs to the technical field of submersible pumps, and provides a medium-high-lift full-cross-flow submersible mixed-flow electric pump which comprises a water suction chamber, an impeller and a water outlet cylinder which are coaxially connected in sequence, a rotating shaft is arranged in the center of the impeller, the two ends of the rotating shaft are in rotatable supporting connection with the water suction chamber and the water outlet cylinder respectively, and a motor shell is arranged on the outer side of the impeller. The two ends of the motor shell are fixedly connected with the water suction chamber and the water outlet cylinder respectively, a wet stator is fixed to the inner side of the motor shell, a permanent magnet rotor is fixed to the outer side of the impeller, the wet stator drives the permanent magnet rotor to drive the impeller to rotate, and a fixing sleeve for fixing the permanent magnet rotor is arranged on the outer side of the impeller. And gaps are formed between the end parts of the two sides of the fixing sleeve and the water suction chamber and between the end parts of the two sides of the fixing sleeve and the water drum and are tooth-shaped. And through the arrangement of the tooth-shaped gaps, the path length of the gaps is prolonged, and a vertically staggered blocking structure is also formed, so that particulate matters in a water body can be prevented from entering the motor cavity.

The application discloses a kind of based on flow pattern recognition's deep sea mining multiphase flow particle delivery prediction and regulation method, the method includes: by acquisition equipment periodic acquisition pressure in pipeline, flow, bubble or droplet volume fraction, solid particle volume fraction in different positions;According to pipe diameter and the gas-liquid ratio obtained by calculation, mixed flow velocity, call pre-built flow pattern division algorithm, distinguish bubble flow, slug flow, vortex, annular flow;Solve the gas-liquid discrete unit volume fraction of any diameter in different flow patterns;According to the gas-liquid discrete phase volume fraction, obtain the delivery speed of solid particles in multiphase flow;Whether the solid particle delivery speed obtained is judged to reach the best interval, according to the result control multiphase flow in pipeline flow pattern or gas-liquid ratio, to adjust the delivery speed of solid particles.The present application can improve the efficiency of seabed mineral exploitation, and avoid the dangerous flow pattern formed by unreasonable gas-liquid distribution ratio, efficiency and safety are taken into account.

The utility model relates to a cracking gasification generator and a biomass gasification furnace with the same, which belong to the technical field of gasification furnaces, the cracking gasification generator comprises an annular pipe, the annular pipe is provided with a biomass gas inlet, a high-temperature gas inlet and gas distribution holes, a heat exchange cavity and a flow mixing cavity are arranged in the annular pipe, a flow guide heat exchange channel and a heating channel are arranged in the heat exchange cavity, and the heating channel is communicated with the flow guide heat exchange channel. One end of the flow guide heat exchange channel is communicated with the biomass gas inlet, the other end of the flow guide heat exchange channel is communicated with the mixed flow cavity, one end of the heating channel is communicated with the high-temperature gas inlet, the other end of the heating channel is communicated with the mixed flow cavity, and the gas distribution holes are distributed in the cavity wall of the mixed flow cavity. And the wood tar is fully subjected to heat exchange with high-temperature gas, so that the wood tar is subjected to a thermal chemical reaction with superheated water vapor, carbon powder and other airflow carriers in a high-temperature environment, the wood tar is synchronously cracked and catalyzed in the biomass gas production process, and the wood tar content in the biomass gas is greatly reduced.

A screw compressor includes an impeller to rotate about an axis and configured to receive a working fluid directed into the impeller along the axis. The screw compressor also includes a diffuser positioned downstream of the impeller, where the diffuser may receive the working fluid from the impeller. The diffuser includes a plurality of first vanes, where the plurality of first vanes defines a plurality of first vane passages, and each first vane passage of the plurality of first vane passages may receive the working fluid. The diffuser also includes a plurality of second vanes, where each second vane of the plurality of second vanes is positioned within a respective first vane passage of the plurality of first vane passages. Each first vane includes a first arc length, each second vane includes a second arc length, and the first arc length is greater than the second arc length.

The application belongs to the technical field of gas mixing, and discloses a gas cyclone mixing device and application thereof, which comprises a mixing cavity, a cyclone structure and a sleeve, wherein the cyclone structure is fixed in the mixing cavity through the sleeve, and the mixing cavity is divided into a mixed flow area, a cyclone area and an equal flow area from left to right in sequence; the cyclone structure comprises a circular plate and a flow-around column fixedly connected, the circular plate is in transition fit with the sleeve, the left side area of the circular plate is the mixed flow area, a plurality of gas inlets are arranged in the mixed flow area, and a plurality of inclined holes are formed in the circular plate; there is a gap between the flow-around column and the sleeve, and the gap is the cyclone area; the equal flow area is a necking portion with a gradually decreasing cross-sectional diameter from left to right, and the right end of the sleeve is in contact with the left side of the necking portion. The application can be applied to mixing of various gases at different temperatures under the working condition of 300k-1500k, and has the advantages of simple structure, rapid, sufficient and uniform mixing, and no power source.

The high-energy efficiency-saving upper air inlet furnace end comprises a furnace base, an inner ring fire distribution cavity and an outer ring fire distribution cavity, the inner ring fire distribution cavity and the outer ring fire distribution cavity are connected to the upper portion of the furnace base, and one side of the furnace base is further provided with a first air pipe and a second air pipe which communicate with the inner ring fire distribution cavity and the outer ring fire distribution cavity correspondingly. An inner fire distribution ring and an outer fire distribution ring which are respectively communicated with the inner ring fire distribution cavity and the outer ring fire distribution cavity are arranged at the top of the furnace seat; a flow guide top cover is further arranged on the top of the outer fire distribution ring, a flow mixing cavity is formed between the flow guide top cover and the outer fire distribution ring, a flow guide opening is formed in the flow guide top cover, and a rotational flow flow guide bottom wall is formed in the position, close to the flow guide opening, of the inner bottom wall of the flow mixing cavity. The inner fire distribution ring is in the shape of an annular cavity with an opening in the top face, and an oxygen supply opening is formed in one side wall of the inner fire distribution ring in an inwards-concave mode. Compared with the prior art, the high-energy and energy-saving upper air inlet furnace end has the advantages that the high-energy and energy-saving upper air inlet furnace end is provided with a drainage air channel structure, and mixing and stable combustion are enhanced.

The invention provides a mixed flow heat exchange device for outputting hot water, which is characterized in that the connecting line of the vertexes of the section of a jet pipe is a square, a pipe wall is formed between the adjacent vertexes of the square, the pipe wall is bent, the bending direction of the bend faces the center of the square, and jet holes for jetting from the inside of the jet pipe to the outside of the jet pipe are formed in the pipe wall. The invention provides a heat exchange device adopting a novel square jet pipe, so that the mixing heat exchange effect of two fluids is better and more uniform, and the heat exchange efficiency is improved.

The utility model relates to the technical field of water conservancy diversion and pressure reduction, and discloses a water conservancy diversion and pressure reduction device for environmental engineering, which comprises a canal main body, diversion and pressure reduction mechanisms are arranged on both sides of the canal main body, an adjusting mechanism is arranged at the top of the canal main body, and each diversion and pressure reduction mechanism comprises an anti-seepage retaining wall. The anti-seepage retaining walls are arranged on the two sides of the anti-seepage retaining walls, the side, away from the canal body, of each anti-seepage retaining wall is provided with a sewage canal, sidewalks are arranged on the two sides of the top of the canal body, and ventilation openings are formed between the sidewalks and the canal body. According to the water conservancy flow dividing and pressure reducing device for environmental engineering, the problems in rainwater and sewage separation design and construction in a river channel are completely solved, seepage and mixed flow phenomena are avoided, and the environment is kept good. The protective fence is simple in structure, convenient to operate and easy to implement, the height of the protective fence can be adjusted according to the height of water flow in the water channel body, and the using effect of the protective fence is improved.

The application provides a four-tower forward-reverse mixed flow four-effect crude methanol refining process method, which comprises the following steps: the bottom effluent of a pre-refining tower, the bottom effluent of a negative pressure refining tower and the bottom effluent of a pressurized refining tower are respectively introduced into the negative pressure refining tower, the pressurized refining tower and the atmospheric pressure refining tower; the overhead effluent of the pressurized refining tower is used for heating at least one reboiler at the bottom of the atmospheric pressure refining tower; and the overhead effluent of the atmospheric pressure refining tower is used for heating at least one reboiler at the bottom of the pre-refining tower and at least one reboiler at the bottom of the negative pressure refining tower. The application can maximize the reasonable distribution and utilization of the heat of the gas phase material at the top of the atmospheric pressure refining tower, and effectively reduce the energy consumption of the methanol refining system.

The utility model relates to the field of mixed-flow drying machines, and discloses an angular box of a mixed-flow drying machine and a drying box body of the angular box. The horn box comprises a box top wall extending from a first end to a second end of the horn box; the box side walls are respectively arranged at the bottom edges of the box top walls; the box side wall extends from the first end to the second end, and the height of the box side wall is gradually reduced to zero. The angular box is arranged in the drying box body. Through the box side walls with the gradually-changed heights on the angular box, when passing through the second end of the angular box, hot air can be diffused through the two sides and the bottom of the angular box at the same time, blocking of the angular box to hot air flowing is reduced, the hot air diffusion speed is increased, and the hot air diffusion path is increased; therefore, the problem that the angular box of the mixed-flow drying machine is poor in hot air diffusion is solved, and the effect of improving the drying rate and drying uniformity of the hot air on the materials is achieved.