45results about How to "Uniform flow field" patented technology

The invention relates to the technical field of kitchen appliances, in particular to an integrated range hood system. The integrated extractor hood system is characterized in that a heat exchange cavity of a shell comprises a first area and a second area which are independent from each other, a phase change evaporator is arranged in the first area, and a phase change condenser is arranged in the second area; the oil smoke suction channel is located in the first area and does not communicate with the heat exchange cavity, and in the height direction of the shell, the phase change condenser is higher than the phase change evaporator; the flow guide plate is arranged on an airflow flowing path between the fresh air inlet and the air supply outlet, and at least part of the flow guide plate is arranged to be capable of moving up and down in the height direction of the shell so as to change the angle of the flow guide plate relative to the fresh air inlet, so that the angle of the flow guide plate can be adjusted according to different working requirements; the fresh air flow field is uniform, and the heat exchange efficiency is improved; the power output end of the driving mechanism is in driving connection with the flow guide plate.

The invention relates to the technical field of pulverized coal selecting devices, and discloses an efficient centrifugal pulverized coal selecting device and a method thereof.The efficient centrifugal pulverized coal selecting device comprises a third separator shell, and a second separator shell is installed at the top end of the third separator shell. According to the efficient centrifugal pulverized coal selecting device and method, under the same primary air flow working condition, when the efficient centrifugal pulverized coal selecting device is adopted, the internal flow field of a coal mill is uniform, the flow speed is not larger than 10 m / s, and resistance is small. A rotor of a traditional dynamic powder selecting device serves as a resistance belt, the internal resistance is large, the peripheral flow speed is about 20 m / s, and abrasion is extremely large. According to the efficient centrifugal powder selecting device, an air suction type rotor with arc-shaped bionic blades is adopted, drainage is achieved through a wing-shaped front guide device, air suction is forcibly conducted below the rotor, and the efficient centrifugal powder selecting device faces a larger ascending air powder section below; a rotor of a traditional dynamic powder selecting device rotates to form a resistance belt, an air inlet channel and a coarse powder discharging channel of the traditional dynamic powder selecting device coincide in the annular peripheral area of the rotor in a hedging mode, and therefore the volume strength of the efficient centrifugal powder selecting device is much larger than that of the traditional powder selecting device.

The utility model discloses a kind of sinking flow guide scraping wall type stirring oil drum, it is related to stirring oil drum technical field, including support, motor and barrel body, the bracket side surface installs barrel body fixing frame, the barrel body fixing frame is fixed with barrel body, the bracket bottom installs brake universal wheel, the bracket side surface installs sliding rail, the sliding rail side surface installs sliding frame, the sliding frame side surface installs motor, the motor bottom installs stirring rod, the stirring rod side surface installs stirring shaft, the stirring shaft end installs scraper. Without scraping wall mechanism, suspended solid or colloid in the area close to pool wall can deposit, solidify constantly, form thick silt or scale on wall surface in a long time. The utility model passes through the continuous contact of scraper and barrel wall, scrape all adherend in real time to bottom, make wall surface keep neat, avoid the generation of any stationary layer, guarantee that entire barrel body inside always maintains consistent flow field and mass transfer condition.

The utility model provides a peripheral transmission mud scraping and sucking machine, which relates to the technical field of mud sucking and comprises an end beam driving mechanism, a working bridge is arranged at the top of the end beam driving mechanism, a slag scraping device is arranged at the bottom of the working bridge, a skimming device is connected to the side surface of the slag scraping device, and a mud sucking system is arranged at the bottom of the skimming device. And a plurality of sludge quantity regulating valves are distributed on the side surface of the sludge suction system. According to the utility model, scum, floating objects and the like on the surface of the sedimentation tank are scraped and collected through the scum scraping device, so as to prevent the scum, floating objects and the like from generating adverse effects on the subsequent treatment process, keep the water surface of the sedimentation tank relatively clean and tidy, and improve the overall appearance and environment of treatment facilities; the timely cleaning of the scum helps to improve the efficiency and quality of sewage or wastewater treatment and ensure the normal proceeding of the treatment process, and the skimming device provides separation and removes solid impurities or precipitates in the liquid, thereby being beneficial to realizing slag-liquid separation, improving the efficiency in the use process and reducing the conditions of abrasion and blockage.

The utility model discloses annealing equipment which comprises a furnace body with a heating cavity, an air inlet plate and an air outlet plate with an air outlet cavity, wherein the air inlet plate and the air outlet plate are respectively arranged on two sides of the furnace body; the gas inlet plate is provided with a plurality of gas inlets conveying gas to the heating cavity, the side, close to the furnace body, of the gas outlet plate is provided with a strip-shaped circulation opening which is communicated with the heating cavity and the gas outlet cavity and is in a gradually-expanding shape, a gas outlet pipeline independent of the gas outlet cavity is formed in the gas outlet plate, and a plurality of gas outlets are formed between the gas outlet cavity and the gas outlet pipeline. An extraction opening communicated with the air outlet pipeline is formed in the side part of the air outlet pipeline; wherein the corresponding diameter of the air outlet close to the extraction opening is smaller than the corresponding diameter of the air outlet far away from the extraction opening. According to the utility model, the uniformity of a gas flow field and a temperature field of the heating cavity in the annealing equipment is realized.

The invention relates to the field of aero-engine high-altitude simulation test equipment, and discloses a gas mixing device for an air environment simulation test, the gas mixing device comprises a regular three-way pipe fitting and a mixing structure, the mixing structure is arranged in the regular three-way pipe fitting, and a hanger plate in the radial direction is arranged in a main pipe of the regular three-way pipe fitting; the tail end of the mixing structure is inserted from a branch pipe of the regular tee pipe fitting, penetrates through the hanging plate and then makes contact with the inner wall of the main pipe. The mixing structure comprises multiple layers of mixing assemblies arranged in the radial direction of the main pipe, a low-pressure gas channel is arranged between every two adjacent layers of mixing assemblies, high-pressure gas channels perpendicular to the low-pressure gas channels are formed in the mixing assemblies, and spraying structures communicating the low-pressure gas channels with the high-pressure gas channels are formed in the mixing assemblies. The gas mixing device can solve the technical problems that an existing mixing device is prone to separation or vortexes, an air inlet flow field is extremely uneven, consequently, the mixing effect is poor, the pressure loss of the mixing device is large, and the pressure requirement of an inlet of an engine cannot be met.

The utility model discloses a radiant tube system structure and a natural gas converter comprising the radiant tube system structure. The radiant tube system structure comprises an inlet gas collection header pipe, a gas transmission header pipe and a plurality of groups of parallel radiant tube arrays, wherein each group of parallel radiant tube array comprises an inlet distribution tube, an outlet collecting tube and a plurality of paths of parallel radiant tubes; each parallel radiant tube comprises an inlet pigtail tube, a conversion tube and an outlet connecting tube which are sequentially connected from top to bottom, the two parallel radiant tubes are symmetrically distributed on the two sides of the inlet distribution tube, the inlet pigtail tubes are horizontally and vertically connected with the axis of the inlet distribution tube, and the outlet connecting tubes at the outlets of the parallel radiant tubes are connected with an outlet collecting tube. And a group of connected radiant tube arrangement is formed. According to the utility model, the high-temperature expansion thermal stress of the whole pipe system during operation can be effectively reduced.

The invention belongs to the technical field of flue gas purification, and discloses an ammonia water denitration device and method.The device comprises an absorption tower and a compensation assembly, the compensation assembly comprises a liquid storage tank, and the liquid storage tank is connected with a spraying medium through a liquid inlet pipeline and communicated with a spraying layer of the absorption tower through a liquid outlet pipeline; the piston is arranged in the liquid storage tank in a sliding manner and is used for dividing the liquid storage tank into a liquid storage chamber and a driving chamber; an air outlet of the air cylinder communicates with the driving cavity through an air inlet pipeline, and the air cylinder is used for driving the piston to extrude the liquid storage cavity; according to the scheme, when spraying is started, air is supplied through the air cylinder to drive the piston to slide in the liquid storage tank, so that a medium in the liquid storage cavity is squeezed, the pressure of the medium is increased, and insufficient power in the initial stage of starting of the water pump is compensated; the device solves the problems of invalid consumption of a reducing agent caused by advanced spraying of an absorption tower and flue gas escape caused by delayed spraying, and is suitable for flue gas desulfurization and denitrification in a caustic soda production process.

The utility model discloses an exhaust vane type silencer structure of an air-cooled heat pump unit, which is mounted above an exhaust fan component of the air-cooled heat pump unit and comprises an upper silencing insert, a lower plenum chamber and a flow deflector component arranged in the lower plenum chamber. The flow deflector assembly comprises flow deflectors, fixing ribs and fixing columns, the flow deflectors are at least used for adjusting flow field distribution in the silencer, and the fixing ribs are connected with the flow deflectors and the fixing columns. The flow deflector is used for adjusting the flow field of airflow entering the silencer insertion piece part, so that the flow field in the silencer is more uniform, the situation that airflow regeneration noise is increased due to the fact that the local wind speed is too high is avoided, and finally the actual noise reduction performance of the silencer is improved.

This invention relates to the field of high-purity aluminum purification technology and discloses a high-purity aluminum vacuum purification device, including a support and a crucible fixedly connected to the top of the support. The crucible has several release grooves on its bottom circumference, a heating assembly is arranged around the crucible, a sealing cover is movably hinged to the top of the crucible, an air extraction port is provided at the upper end of the sealing cover, a locking ring is rotatably connected to the bottom of the sealing cover, and several locking grooves are arranged around the outer circumference of the locking ring. Several locking blocks arranged in a circumferential array are fixedly connected to the inner wall of the top of the crucible. This invention, through the automatic closing and locking assembly of the sealing cover, can control the uniform pressure applied to all parts of the sealing cover edge, resulting in rapid and reliable sealing operation, thereby enhancing sealing performance and improving purification quality. Furthermore, without affecting purification quality, it greatly increases the purification rate of high-purity aluminum, achieving uniform cooling of the aluminum ingot from the core to the outer wall, ensuring the stability of directional crystallization.

The invention provides a flow battery electrode frame assembly, a galvanic pile unit and a galvanic pile, the flow battery electrode frame assembly comprises an outer frame body, the middle part of the outer frame body is a first hollow structure for embedding a first electrode, the upper and lower parts of the front and back surfaces of the outer frame body are provided with electrolyte flow channel grooves, and the four corners of the outer frame body are respectively provided with electrolyte flow holes communicated with the corresponding electrolyte flow channel grooves; a plurality of first distribution runners communicated with the electrolyte runner groove are arranged on the front surface of the outer frame body and close to the edge of the first hollow structure; a film pressing frame mounting groove is formed in the reverse side of the outer frame body and surrounds the edge of the first hollow structure; the middle part of the film pressing frame is a second hollow structure for embedding a second electrode, and one surface of the film pressing frame is provided with a plurality of second distribution runners; and after the film pressing frame is embedded in the film pressing frame mounting groove, the second distribution flow channel is connected and communicated with the electrolyte flow channel groove on the side where the second distribution flow channel is located. According to the technical scheme, the area ratio of the electrode reaction region can be ensured to the maximum extent, and the reaction efficiency of the flow battery is improved.

The invention discloses a pulverized coal boiler with a membrane type water cooling screen structure in a hearth, which comprises the hearth and a tail flue, a water cooling wall is arranged on the inner wall of the hearth, a platen superheater is arranged at the inlet of the tail flue at the upper part of the hearth, a tail heating surface is arranged in the tail flue, and a water cooling screen is arranged at the front part of the platen superheater at the upper part of the front wall of the hearth. The upper portion of the water-cooling screen is connected with a boiler barrel through an ascending pipe, the boiler barrel is connected with a descending pipe, the bottom of the descending pipe is connected with a header, the header is connected with the lower portion of the water-cooling screen, and the platen superheater and the tail heating surface are communicated with the boiler barrel through pipelines respectively. The water-cooling evaporation screen is additionally arranged on the basis of a traditional pulverized coal boiler steam-water system, and the purposes of expanding the evaporation heating surface and increasing the evaporation capacity are achieved. And the hearth area is reduced under the same evaporation capacity, and the cost is saved. And the evaporation capacity of the pulverized coal boiler is improved safely and efficiently at low cost. The requirement of the market for boiler load improvement is met, energy and capital consumption is effectively reduced, and the energy utilization rate is increased.

The present invention belongs to the field of wafer manufacturing technology, and particularly relates to a device for preventing fog from overflowing in a wafer photoresist and metal stripping process. The device comprises a fixed splash-proof ring, an inner splash-proof ring, a primary filtering device, a lifting splash-proof ring, a lifting splash-proof ring driving mechanism and an exhaust duct, wherein the fixed splash-proof ring, the inner splash-proof ring and the lifting splash-proof ring are nested from outside to inside in sequence, and an annular gap is left between the inner splash-proof ring and the fixed splash-proof ring, the primary filtering device is arranged at the lower end of the inner splash-proof ring, the lifting splash-proof ring driving mechanism is connected to the lifting splash-proof ring, and is used to drive the lifting splash-proof ring to rise and fall, the exhaust duct is connected to the fixed splash-proof ring, and is communicated with the annular gap between the inner splash-proof ring and the fixed splash-proof ring. The present invention has a three-layer filtering system and a unique exhaust flow field, which prevents metal debris from entering the exhaust duct and fog from condensing and accumulating in the exhaust duct, and solves the problems of fog overflow, air duct blockage and low metal recovery rate that occurred when the stripping cavity was used in the past.

The invention belongs to the technical field of desulfurization wastewater treatment, and particularly relates to a bypass flue gas evaporation system for zero emission of desulfurization wastewater, which comprises two units, outlet flues of a denitration system A reactor and a denitration system B reactor are both connected with a bypass high-temperature flue gas system, and the bypass high-temperature flue gas system is connected with a high-temperature flue gas three-way valve group device. The high-temperature flue gas three-way valve group device is connected with the top end of the drying tower, the bottom end of the drying tower is connected with the low-temperature flue gas three-way valve group device, the low-temperature flue gas three-way valve group device is connected with the bypass low-temperature flue gas system, outlet flues of reactors A and B of the denitration system are correspondingly connected with air preheaters A and B, and outlet flues of the air preheaters A and B are correspondingly connected with dust removers A and B; two branch pipes of the bypass low-temperature flue gas system are correspondingly connected with outlet flues of the air preheater A and the air preheater B, the structure of the other unit is the same as the connection relation of the unit, the two units share the high-temperature flue gas three-way valve set device, the low-temperature flue gas three-way valve set device and the drying tower, the system can switch flue gas operation modes, and the wastewater treatment capacity is stable.

The air return pipe structure of the drying oven comprises an air return pipe body, and a plurality of upper air return holes communicated with the interior of the air return pipe body are evenly formed in the upper surface of the air return pipe body. A plurality of side air return holes communicating with the interior of the air return pipe body are evenly formed in the two opposite sides of the air return pipe body, a fresh air inlet communicating with the interior of the air return pipe body is formed in the air return pipe body, the fresh air inlet is used for feeding dry air into the air return pipe body, and an air outlet is formed in the air return pipe body. And air flow in the air return pipe body is exhausted through the air outlet. The drying oven has the advantages of balancing an air flow field and a pressure field in the drying oven and uniformizing a temperature field in the drying oven during air return and fresh air introduction.

According to the flue flow field design method and device and the electronic equipment provided by the invention, the system data of the flue gas treatment system is acquired, and the flue hole opening design processing is performed according to the system data to obtain the target hole opening information; the system data at least comprises structural characteristics of the flue gas treatment system; determining flue gas extraction point information of a flue gas pipeline in the flue gas treatment system according to the target trepanning information, and performing flue flow field flow velocity simulation treatment on the flue gas treatment system based on the flue gas extraction point to obtain flue flow field simulation information; performing flue flow field design treatment on the flue gas treatment system according to the flue flow field simulation information to obtain a target flue flow field; the target flue flow field is used for ensuring that the flow velocity of the flue is uniform through the additionally arranged preset guide plate. According to the embodiment of the invention, the flue flow field is designed according to the flue gas extraction point information and the flue flow field simulation information, and the flow velocity of the flue is ensured to be uniform through the additionally arranged preset guide plate, so that the flue flow field can be ensured to be uniform, the abrasion is reduced, and the flue gas treatment efficiency is improved.

The present invention discloses a fuel assembly and a lower tube seat thereof, wherein the lower tube seat comprises a connecting plate, a plurality of supporting legs and a supporting structure; a plurality of the supporting legs are connected at intervals below the connecting plate, and the supporting structure is connected below the connecting plate between the plurality of supporting legs. The present invention arranges a supporting structure on the connecting plate, thereby reducing the stress of the lower tube seat and the fluid pressure loss coefficient in the lower tube seat area, and improving the dimensional stability of the lower tube seat; by reducing the stress level of the lower tube seat connecting plate, space is reserved for improving hydraulic performance, so that the flow field of the fuel rod bundle area above the lower tube seat is more uniform, which is conducive to reducing the flow-induced vibration level of the lower end of the fuel rod.

The present invention provides a three-dimensional variable space condensing gas water heater whose heat exchange core is shaped like a woven daily necessity "bamboo basket". The heat exchange core is mainly composed of a water heater shell, a "basket"-shaped three-dimensional variable space heat exchange core, a guide tube, a partition layer and a burner, wherein the heat exchange core is composed of a single-layer or multi-layer "basket"-shaped coil, and is connected by a water inlet header and a water outlet header. The "basket"-shaped coil is made of a three-dimensional variable space tube, and the high-temperature flue gas generated by the burner enters the "basket"-shaped three-dimensional variable space heat exchange core and performs efficient heat exchange with the medium in the tube. The use of this three-dimensional variable space variable cross-section "basket"-shaped heat exchange core can effectively improve the heat exchange coefficient of the gas water heater heat exchanger, thereby improving the heat exchange efficiency of the water heater, which is beneficial to reducing the total volume of the water heater, reducing weight, saving materials, and reducing costs. In addition, it is easy to clean dust and scale, and extend the maintenance cycle.

The invention belongs to the technical field of casting and rolling, and particularly relates to a long-service-life self-heating casting nozzle and a using method thereof.The self-heating casting nozzle comprises a casting nozzle structure and a magnet exciting coil system; the casting nozzle structure comprises a casting nozzle box, one end of the casting nozzle box is provided with a conical feeding port, and the other end of the casting nozzle box is provided with a discharging port. An adjusting plate is arranged at a notch in the upper end of the casting mouth box, and an adjusting assembly is arranged above the adjusting plate. The periphery of the casting mouth box structure cavity is surrounded by the magnet exciting coil system, the magnet exciting coil system comprises a magnet exciting coil, a copper inner sleeve is arranged on the inner ring side of the magnet exciting coil, end covers are arranged on the two end sides of the magnet exciting coil, supporting plates are arranged between the magnet exciting coil and the end covers and between the magnet exciting coil and the copper inner sleeve, and a magnet exciting coil system outer sleeve is arranged on the outer ring side of the magnet exciting coil; and a cold water nozzle is sleeved outside the excitation coil system. The opening and closing degree of the discharging port is adjusted by adjusting the angle of the adjusting plate, and the discharging thickness is controlled to be 3-5 mm; and through the action of the magnet exciting coil system, the temperature drop and the structure uniformity of the semi-solid melt are improved.

The invention relates to the technical field of wind tunnel test devices, in particular to a rectification section structure and a wind tunnel. The rectification section structure comprises a rectification support, and the rectification support is provided with an opening structure used for rapidly disassembling and assembling the honeycomb device and the silk screen. The opening structure comprises a honeycomb mounting groove and a silk screen bending groove, the honeycomb mounting groove is used for mounting a honeycomb assembly, and the silk screen bending groove is used for mounting a silk screen assembly. The honeycomb device and the silk screen can be conveniently and rapidly disassembled and assembled through the opening structure of the rectification support, the honeycomb device assembly is installed in the honeycomb device installation groove, the silk screen assembly is installed in the silk screen bending groove, the honeycomb device and the silk screen can be taken out of the rectification section hole body, the structure is simple, and the honeycomb device and the silk screen can be conveniently maintained or replaced in the future.

The present invention provides a gas injection mechanism and a gas phase reaction device, wherein the gas injection mechanism comprises a first gas injection mechanism located in a middle area for conveying a first gas, and a second gas injection mechanism located in a peripheral area surrounding the first gas injection mechanism for conveying a second gas, wherein the second gas injection mechanism comprises a plurality of second gas conveying channels, at least some of the second gas conveying channels are rotating gas flow channels, the velocity of the gas flow ejected along the rotating gas flow channel comprises an axial component and a tangential component, and the ratio of the tangential component to the axial component is greater than 0, thereby forming a rotating gas flow, and the rotation direction of the rotating gas flow is consistent with the rotation direction of the carrier plate during the reaction process, and the existence of the tangential component of the velocity of the rotating gas flow makes the flow field in the reaction chamber in the edge area flow collision mixing and streamline turning process smoother, thereby suppressing or completely eliminating the generation of vortices in the reaction chamber.

This invention discloses a high-temperature, high-dust-content flue gas purification device, relating to the field of flue gas purification technology. The device includes an adjustable purification structure comprising multiple ceramic filter elements. SCR catalyst components are coated on the surface of each ceramic filter element. A swirling ammonia injection grille is installed at the inlet end of each ceramic filter element. An attitude adjustment mechanism is connected to the purification structure. A PLC control system is electrically connected to the attitude adjustment mechanism, which controls the ceramic filter elements of the purification structure to switch between vertical, inclined, and parallel settings. In the vertical setting, flue gas passes through the filter element in a straight line from top to bottom or bottom to top. In the inclined setting, flue gas passes through obliquely, forming a "Z"-shaped path. In the horizontal setting, flue gas flows laterally through the filter element, and particulate matter is deposited downwards under gravity. This invention solves the problem of low removal efficiency of fine particulate matter, achieving highly efficient purification of high-temperature, high-dust-content flue gas, and is particularly suitable for treating high-emission flue gas under complex operating conditions.

The utility model discloses a fluidization type pulverized coal pipeline flow speed adjusting device, and relates to the technical field of adjusting systems. The fluidization type pulverized coal pipeline flow speed adjusting device comprises a pipe section, flange plates are arranged at the two ends of the pipe section, a plurality of guide pipes are connected to the outer side of the pipe section, the guide pipes are connected with fixing plates, the fixing plates wrap the guide pipes, guide grooves are formed in the upper portions of the fixing plates in the extending direction of the guide pipes, and the guide grooves are communicated with the interiors of the guide pipes. The upper portion of the fixing plate is connected with a fixing shell. When the adjusting device is used, zero resistance can be achieved at the minimum, the wind speed leveling function is achieved, meanwhile, the added value of resistance of a powder pipe system can be reduced to the maximum extent, due to the fact that the resistance elements are in a comb tooth shape, even if the adjusting device is completely turned off, most pulverized coal can pass through normally, and a primary powder pipe cannot be blocked; therefore, the safe operation of the coal pulverizing system is ensured.

The invention discloses a single-stage booster fan, a multi-stage booster fan and a multi-channel booster fan, and relates to the technical field of automobile ventilation equipment, and the single-stage booster fan, the multi-stage booster fan and the multi-channel booster fan comprise a fan shell which is of a closed shell-shaped structure as a whole, an air inlet is formed in one end of the fan shell, and an air outlet is formed in the other end of the fan shell; the rotor part is rotationally installed in the fan shell, the rotor part is provided with a plurality of first axial flow fan blades which are arranged in a radial shape, and all the first axial flow fan blades synchronously rotate along with the rotor part and surround the peripheral side of the rotating axis of the rotor part; the rotor part is matched with a driving mechanism for driving the rotor part to rotate; the stator part is fixedly installed in the fan shell and coaxially arranged on the air outlet side of the rotor part, the stator part is provided with a plurality of second axial flow fan blades arranged in a radial mode, the second axial flow fan blades surround the peripheral side of the axis of the stator part, and the spiral direction of the second axial flow fan blades is opposite to the rotating direction of the first axial flow fan blades; in a limited space, the pressurization ventilation effect in a vehicle is improved.

The present invention relates to the field of high-altitude simulation test equipment for aircraft engines, and discloses a gas mixing device for air environment simulation test, including a positive three-way pipe fitting and a mixing structure, wherein the mixing structure is arranged in the positive three-way pipe fitting, and a radial hanging plate is arranged in the main pipe of the positive three-way pipe fitting, and the end of the mixing structure is inserted from the branch pipe of the positive three-way pipe fitting, and contacts with the inner wall of the main pipe after passing through the hanging plate. The mixing structure includes a multi-layer mixing component arranged along the radial direction of the main pipe, a low-pressure gas channel is arranged between two adjacent layers of mixing components, a high-pressure gas channel perpendicular to the low-pressure gas channel is arranged in the mixing component, and a spray structure connecting the low-pressure gas channel and the high-pressure gas channel is opened on the mixing component. The gas mixing device of the present invention can solve the technical problems that the existing mixing device is prone to separation or vortex, the inlet air flow field is extremely uneven, etc., resulting in poor mixing effect, and the mixing device has a large pressure loss and cannot meet the engine inlet pressure requirement.

An adjustable circulating fluidized bed boiler for incinerating pyrolysis residues is disclosed. This invention addresses the problems of unstable bed temperature and pressure, and equipment shutdown due to excessive parameters, that commonly occur in existing circulating fluidized beds when incinerating different pyrolysis waste residues. The invention comprises a fluidized bed boiler body (6), a sub-bed air chamber (2), multiple dispersion pipes (5), and multiple high-temperature resistant gate valves (32). The sub-bed air chamber (2) is installed at the lower part of the fluidized bed boiler body (6). The upper parts of the multiple dispersion pipes (5) are connected to the fluidized bed boiler body (6) in a ring array, and the lower parts of the multiple dispersion pipes (5) are connected to the sub-bed air chamber (2). Each dispersion pipe (5) is equipped with a high-temperature resistant gate valve (32). The opening degree of the high-temperature resistant gate valve (32) is remotely adjusted through a control program to achieve bed pressure regulation of the fluidized bed without changing the combustion load and fluidizing air volume. This invention is used for the incineration of pyrolysis residues.

The invention discloses a device and a process for improving the alkalization degree of polyaluminum chloride and the content of solid aluminum oxide, and relates to the technical field of chemical equipment, a mounting cylinder, a dispersion mechanism and a plurality of ion exchange mechanisms are arranged, so that multi-stage and alternate ion exchange and forced redispersion treatment of a high-viscosity polyaluminum chloride salt raw solution are realized, and the high-viscosity polyaluminum chloride salt is obtained. The phenomena of dead zone, bias flow and channeling caused by high viscosity characteristic in the traditional single-stage or simple multi-stage fixed bed are effectively inhibited, the flow field of the solution in each ion exchange layer tends to be uniform, and the actual effective contact time is closer to the theoretical retention time, so that the chloride ion removal rate and the alkalization degree amplification are obviously improved, and the quality of the product is improved. Meanwhile, the stability of the content of solid aluminum oxide and the quality consistency between batches of products are improved, and finally the overall quality stability and preparation efficiency of the polyaluminum chloride salt product are improved.

The invention relates to an efficient compact hydraulic structure for an ultra-large flow LNG (Liquefied Natural Gas) shipping pump, which is characterized in that a rectification guide vane is arranged between an inducer and a first-stage impeller, and blades of the rectification guide vane are designed to be axially arranged so as to absorb energy pulsation of inlet liquid and smooth liquid impact loss. The spiral guide vanes of the flat type axial flow guide vanes of the guide shell are distributed in a diffusion mode, so that the axial spiral angles of the vanes are slowed down, the sectional area of the flat type axial flow guide vanes is increased, medium filling is more uniform, few vortexes exist in a low-speed area, the pressure pulsation level is lower, and hydraulic vibration is smaller. Meanwhile, a flow guide hydraulic flow channel is directly designed in the corresponding outlet section, an internal blade is directly cast into a second outer barrel of the flow guide type outlet section by casting a 3D printing process model, a secondary flat type axial flow guide blade does not need to be additionally arranged independently, the distance of the axial size is greatly shortened, the overall gravity center of a pump unit is reduced, and the flow guide efficiency is improved. The applicability and effectiveness of axial space hydraulic flow are improved, and effective space is saved.

The utility model discloses a spiral dead steam recovery device capable of quickly replacing a heat exchange tube. The spiral dead steam recovery device comprises a heat exchange cavity, a spiral baffle plate, a straight heat exchange tube and a counterbore hole plate, counterbore hole plates are arranged at the two ends of the heat exchange cavity respectively. The spiral baffle plate is accommodated in the heat exchange cavity; the straight heat exchange pipe is detachably installed in the heat exchange cavity and penetrates through installation holes formed in the spiral baffle plate and the counterbore hole plate in an aligned mode. And the straight heat exchange tubes are connected and fixed through the nuts and the sealing gaskets, so that the straight heat exchange tubes can be quickly dismounted, replaced and mounted after being corroded or damaged.

This invention proposes a cable sheath lead sealing and welding fixing mold, specifically relating to cable processing equipment. The cable sheath lead sealing and welding fixing mold includes a worktable and a lower mold fixedly connected to the worktable. Multiple limiting rods are fixedly connected to the lower mold, and an upper mold is slidably connected to the multiple limiting rods. A lead injection hole is opened in the middle of the upper mold. Both ends of the lower and upper molds are provided with clamping parts. Each clamping part includes a first arc-shaped clamping plate rotatably connected to the lower mold and a second arc-shaped clamping plate rotatably connected to the upper mold. The cable sheath lead sealing and welding fixing mold provided by this invention uses a drive unit to rotate the cable held by the clamping parts within the mold. Centrifugal force effectively removes air bubbles and impurities from the molten lead, making the temperature and flow fields of the molten lead more uniform, thereby reducing defects such as porosity and shrinkage, and enhancing the bonding effect between the lead layer and the cable sheath.