71 results about "Porous cylinder" patented technology

The invention relates to a screw pressure evaporator used for the waste water treatment, which is used in the process for removing the liquid matter from the waste water in the food industry. A porous cylinder in the cylindrical shape is arranged inside the outer tube, and the cylindrical metal filter is arranged inside the porous cylinder. The screw wiper blade of the rotary worm scrapes the solid matter filtered by the metal filter, and a movable regulating stop piece is inserted in the rotation axis for adjusting the size of the lumpy object export. The liquid matter in the waste water led from the waste water entry flows through the metal filter, thereby discharging singly through the liquid matter export. The solid matter in the waste water is compressed by the crew wiper blade of the rotary worm thereby forming the lumpy object which is then discharged singly from the lumpy object export.

The invention provides a dust-free fiber deep filtration filter element. The filter element comprises a porous cylinder, wherein dust-free performance fibers which are high molecular fibers are wound on the outer circumference of the porous cylinder; a material for reducing surface energy is compounded on the high molecular fibers; the high molecular fibers can be polypropylene fibers or polyester fibers; and the material for reducing the surface energy can be polytetrafluoroethylene, organic silicon or fluororesin. The filter element has the characteristics that a high molecular fiber filter material has high air permeability and is convenient to clean, achieves the equivalent effects of a paper filter material with small filter gaps by using the dust-free characteristic of the dust-free performance fibers, and has high air permeability; effective filter area is reduced, and the overall volume of the filter element is reduced; a large-aperture air channel is formed by gaps among the fibers; due to a multi-layer structure, deep filtration is realized, and the dust storing and blocking capability is improved; and the probability that the filter material is blocked is reduced, and the service life of the filter element is prolonged.

The invention discloses an immersed iron carbon micro electrolysis reactor, which is characterized by comprising a reactor cylinder (1), wherein a plurality of porous cylinders (4) are arranged in the reactor cylinder (1); iron carbon filler is filled in the porous cylinders (4); central cylinders (15) are arranged in the middle of the porous cylinders (4) respectively; stirrers (14) are arrangedin the central cylinders (15) one by one; rotating shafts (11) are arranged in the porous cylinders (4) one by one and are provided with blades (16); and the lower part of the reactor cylinder (1) has a water inlet pipe (9) and the upper part of the reactor cylinder (1) has a water outlet pipe (2). The reactor solves the common problems of blockage of an iron carbon bed layer, hardening, passivating and the like of the conventional iron carbon micro electrolysis reactor, overcomes the drawback of overhigh energy consumption due to waste water treatment by co-rotation of waste water and iron carbon which are both placed in a rotating drum of the conventional iron carbon micro electrolysis reactor, and has the advantages of compact structure, small floor area, short retention time, low energy consumption and the like.

The invention discloses an immersed iron carbon micro electrolysis reactor, which is characterized by comprising a reactor cylinder (1), wherein a plurality of porous cylinders (4) are arranged in the reactor cylinder (1); iron carbon filler is filled in the porous cylinders (4); central cylinders (15) are arranged in the middle of the porous cylinders (4) respectively; stirrers (14) are arrangedin the central cylinders (15) one by one; rotating shafts (11) are arranged in the porous cylinders (4) one by one and are provided with blades (16); and the lower part of the reactor cylinder (1) has a water inlet pipe (9) and the upper part of the reactor cylinder (1) has a water outlet pipe (2). The reactor solves the common problems of blockage of an iron carbon bed layer, hardening, passivating and the like of the conventional iron carbon micro electrolysis reactor, overcomes the drawback of overhigh energy consumption due to waste water treatment by co-rotation of waste water and iron carbon which are both placed in a rotating drum of the conventional iron carbon micro electrolysis reactor, and has the advantages of compact structure, small floor area, short retention time, low energy consumption and the like.

A solid oxide fuel cell includes an anode layer, an electrolyte layer over the anode layer, and a cathode layer over the electrolyte layer, wherein at least one of the anode layer and the cathode layer defines at least one gas channel, the gas channel containing at least one support structure. The support structure can have a cross-sectional shape of an I-beam, an arch, a tube defining holes along its length, a porous cylinder, or a U-shaped brace. The support structure can be open at a portion of the gas channel most proximate to the electrolyte layer.

The invention discloses a preparation technology of a catalyst used for high temperature catalytic decomposition of N2O. The preparation technology comprises the following steps: dissolving magnesium nitrate, cobalt nitrate, lanthanum nitrate, cerium nitrate, nickel nitrate and zirconium nitrate in water to form a mixed nitrate solution; adding ammonia water and aluminum hydroxide, and carrying out compacting, dehydrating, drying and baking to obtain a powder material; and uniformly rolling the powder material, desalinized water and a bonding agent, drying the rolled materials to obtain a granulation material, compacting the granulation material to form a porous cylinder, and calcining the porous cylinder to obtain the catalyst. The preparation technology has the following advantages: a co-precipitation method is selected, an active component reacts with a carrier substance precursor and a precipitating agent to realize co-precipitation, and the active component interacts with the carrier, so the active component is well and stably dispersed; and the active component and the carrier precipitate are commonly calcined at a high temperature of 1000-1300 DEG C, so the active component of the catalyst has good heat tolerance and difficulty loses, thereby the catalyst has the advantages of high efficiency, good stability and long service life.

The invention discloses a medicine eluting balloon catheter with a function of thrombus aspiration and vasodilatation, and belongs to the field of medical device. The catheter structure comprises a balloon cavity 1, an auxiliary cavity 2, a RX port 3, a guide wire cavity 4, a developing ring 5, a suction cavity 6 and a Y-type connector 7. The balloon cavity is in the outermost layer of the suctioncatheter, the auxiliary cavity 2 is on the inner wall of the suction cavity 6, and the guide wire cavity 4 is on the distal end inner wall of the suction cavity 6. The medicine eluting balloon catheter is used for medicine thrombolysis by injecting thrombolytic medicine into the suction cavity 6. The invention of the medicine eluting balloon catheter is set an auxiliary chamber on the inner wallof the suction cavity 6, applying the improved in vitro ultrasonic assisted thrombolysis (ETUS) function, and a small metal microporous cylinder is placed in human body by the auxiliary cavity 2 conveying system; the medicine eluting balloon catheter reflects multiple direction ultrasonic wave through in vitro ultrasonic probe ultrasound and porous cylinder to amplify ultrasonic cavitation effect,improving the efficiency of broken bolt, and feeds into the interference wire through the auxiliary cavity 2 to break the bolt with mechanical force.

The invention provides a combustor used for DPF regeneration. The combustor comprises a combustion cylinder, a diesel oil atomizer and an ignition mechanism; the diesel oil atomizer is used for providing atomized diesel oil for the combustion cylinder, the ignition mechanism is used for igniting the atomized diesel oil, the combustor is provided with a tee-joint pipe, a first passage of the tee-joint pipe is communicated with an exhaust pipeline of a diesel engine, a second passage communicates with a combustion supporting air flow equilibrium distribution chamber, a third passage communicateswith a tail gas mixing cavity way, an air flow between the second passage and the third passage is distributed by a valve, a porous cylinder is arranged in the combustion supporting air flow equilibrium distribution chamber, the inner wall of the porous cylinder is connected with multiple radial flow guide plates, the combustion cylinder is located in the tail gas mixing cavity way, the front endis located in the porous cylinder, the rear end is communicated with the tail gas mixing cavity way, a nozzle of the diesel oil atomizer and the ignition mechanism are located at the front end of thecombustion cylinder, and the rear end of the tail gas mixing cavity way is used for communicating with a DPF inlet end.

The invention discloses an adsorption-based external-heating small air water taking device. The small air taking device is suitable for small constant temperature and constant humidity air conditioning cabinets in museums to provide protection for cultural relics. The small air water taking device comprises a heating belt, an adsorption bed, a water storage tank, a cooling fan, an adsorption bed outer wall, a base and the like. In the adsorption stage, an air inlet fan works, air enters an annular flow passage between the adsorption bed outer wall and an outer porous cylinder through an air inlet, enters the adsorption bed, passes through an adsorbent and is discharged from a central flow passage; in the desorption water taking stage, after air is heated by the heating belt, the heated airflows through the adsorption bed to heat the adsorbent, and accordingly, water accumulated in the adsorption stage is taken away, the air with high humidity condenses into water droplets when in contact with the cold surface, the cooling fan takes away excess heat, the water droplets flow into the water storage tank along the wall surface after condensation, and the function of water taking is achieved. The device has the advantages of small size, simple structure, compact parts and the like, damageable parts such as valves are avoided, and water can still be taken at the low dew point temperature.

The invention provides a filter core for a down flow type filter cylinder dust remover, and belongs to the technical field of manufacture of dust removers. The filter core comprises an elliptical porous cylinder core, a wrinkle-shaped filter layer and coarse filter cloth, wherein the coarse filter cloth is covered on the periphery of the wrinkle-shaped filter layer; the wrinkle-shaped filter layer is in a similar stelliform elliptical cylinder-shaped structure and formed by folding a filtering material with certain length into winkles and adhering end to end; the inner edges of all the winkles are all distributed on the periphery of the elliptical porous cylinder core; winkle heights are symmetrically distributed relative to an elliptical short axis, and the winkle heights positioned at one side which corresponds to a semi-major axis positioned at each side of the elliptical short axis are h, and all the winkles positioned at the other side are divided into four equal pieces; and the winkle heights of each equal piece are sequentially h+d, h+2d, h+3d and h+4d by being far away from the endpoint of a long axis. The filter core disclosed by the invention enlarges the filter area of a windward side and increases the filter efficiency in such a way that the arithmetic sequence of the winkle heights accord with the flow regularity of air.

The invention relates to a pipe type hydraulic fluid muffler, relating to the hydraulic pipes of hydraulic equipment and being used for solving the noise problem of the hydraulic pipes. The pipe type hydraulic fluid muffler consists a muffler shell and a muffler main body arranged in the muffler shell, wherein an inlet flange, a connecting pipe, an arc joint, a cylinder, a reducer union and an outlet flange of the muffler shell are welded together in sequence, and the inlet flange and the outlet flange are respectively connected in series with the hydraulic pipes at the two ends; and the muffler main body consists of a porous cylinder, a porous cone, a baffle and connecting reinforced plates, wherein the porous cylinder is connected with the big end of the porous cone, the small end of the porous cone is sealed with the baffle, and the connecting reinforced plates are respectively welded between the porous cylinder and the porous cone and between the porous cone and the baffle. Since the pipe type hydraulic fluid muffler is connected in series with the hydraulic pipes, the noise and vibration of a hydraulic system can be lowered and reduced effectively. The pipe type hydraulic fluid muffler has the advantages of novel and simple structure, low cost, good practicality, and the like.

The invention discloses threshing apparatus of a rice and wheat threshing machine. The threshing apparatus comprises a threshing machine case, a multifunctional roller, a roller bottom cover and a screening device; the threshing machine case is of a square shell structure; the surface of the threshing machine case is provided with an object inlet, a rice husk outlet and a grain outlet; the feedingport is formed in the left side surface of the threshing machine case; the rice husk outlet and the grain outlet are arranged at the bottom end of the threshing machine case; the multifunctional roller is arranged in the threshing machine case; the multifunctional roller comprises a wheat threshing device and an air blowing device; and the wheat threshing device comprises winding rolling heads, threshing cutters, a porous cylinder and a gear shaft. The threshing apparatus provided by the invention has the advantages of reasonable design, simple operation, convenient use, saved cost, full threshing, thorough screening and convenient cleaning. In the case of power failure, a blast structure can be manually rotated to clean chippings in the case.

The invention relates to a preparation method of a photoelectrocatalytic oxidation catalyst for treating high-salinity wastewater. The photoelectrocatalytic oxidation catalyst is prepared by steps of utilizing porous Al2O3 as a carrier, loading active component TiO2 onto the carrier by means of liquid-phase deposition and then drying and calcining to prepare the photoelectrocatalytic oxidation catalyst. The prepared catalyst is in the shape of a porous cylinder, fluid and ultraviolet light can access the inside of the photoelectrocatalytic oxidation catalyst freely, and particles of the active component TiO2 are small in particle size and uniform in distribution.

The invention discloses a device for extracting iodine from wet process phosphate acid liquor. The device is double-chamber cylindrical equipment constituted by a casing and an inner barrel, wherein an inner chamber is arranged in the inner barrel, and an outer chamber is arranged between the casing and the inner barrel; the inner barrel is a porous cylinder body with a fixed pore diameter; a circular top cover is arranged at the top of the inner chamber; a phosphate acid liquor inlet is formed at the center of the top cover; a circular bottom plate is arranged at the bottom of the inner chamber; a rotor is mounted at the center of the bottom plate; eddy flow baffle plates are mounted on the wall of the inner chamber; a slope-shaped cover plate is mounted at the top as well as the bottom of the outer chamber; extract medium outlets are formed on the slope-shaped cover plate at the top, and acid liquor outlets are formed on the slope-shaped cover plate at the bottom; an annular porous distributing device is mounted at the middle of the outer chamber; and extract medium inlets are formed on the wall of the lower part of the casing and the bottom plate of the inner chamber respectively. The device provided by the invention has the characteristics of small size and simple structure; since no filler is used, the circumstance that wet process phosphate is blocked by filler can be avoided; and the device is novel energy-saving equipment with extremely high iodine extraction efficiency and low cost.

The invention relates to a biological deodorizing composite filler which is prepared from the following materials by weight percentage: 20-30% of urban abandoned construction waste, 30-40% of high-calcium coal ash, 20-30% of leaf powder, and 10-20% of an adhesive. According to the invention, various components are sufficiently and uniformly mixed, and the mixture is put into a die to be extruded into a porous cylinder, and can be used after being dried. The filler has relatively high mechanism strength, and is good in stability, good in caking property, long in service life, relatively low incost, strong in buffering capacity, rich in organic nutrients, good in air permeability, and remarkable in deodorizing effect.

The invention belongs to the technical field of drilling operation, and particularly relates to a machine tool for drilling operation of a porous cylindrical workpiece and an operation method of the machine tool. The machine tool comprises a machine tool base, a numerical control system, a numerical control rotary working table, a hydraulic system, drilling rod boxes, a four-jaw chuck, a left stand column and a right stand column; the drilling rod boxes comprise the left drilling rod box and the right drilling rod box; a left multi-shaft power head is arranged on the left drilling rod box, a right multi-shaft power head is arranged on the right drilling rod box, and the distance between the left multi-shaft power head and the right multi-shaft power head is adjustable; a rotating drag plate and a rotating lead screw are further arranged on one side of the machine tool base; and the machine tool has the beneficial effects that a machine tool structure for machining a cylindrical part is shaped to a eudipleural double three-coordinate structure, a left drilling rod box main shaft is provided with a multi-shaft drilling power head, and a right drilling rod box main shaft is provided with a multi-shaft drilling power head; the left side and the right side can carry out machining at the same time, and also can carry out independent machining; and high cost performance is achieved, the efficient semi-automatic machining manner can completely replace the original machining method for machining products of the same kind, and the automatic degree and the machining efficiency are greatly improved.

The invention relates to the technical field of chemical engineering, and especially relates to a technology for post-treating cyanacetate. The technology for post-treating cyanacetate with an alkali neutralizer, an adsorbent and a drying agent is characterized in that: cyanacetate to be treated continuously goes through a tower filled with an excess solid treating medium, and a filtering medium, and a finished product is obtained in a one-step mode without separation, wherein the solid treating medium is a porous cylinder prepared from a material comprising, by mass, 5-30% of CaO, 30-80% of a carbonate and 5-60% of an ion exchange resin. The technology of the invention has the characteristics of simple equipment structure and simple flow operation; and the cyanacetate to be treated enters the tower from the inlet, goes through the treating medium and the filtering medium, and becomes the finished product after flowing out of the outlet, so the technology of the invention has the advantages of one-step continuous treating at normal temperature, no wastewater generation, no generation of dimalonate impurities, and high cyano removal rate, high acidity removal rate and high water removal rate when the water content is low.

The invention belongs to the technical field of subsurface flow wetlands, and provides an anti-blocking structure used for a subsurface flow wetland and the subsurface flow wetland. The technical solution is that a porous cylinder is horizontally fixed between the walls of a purification tank and passes through a water-permeable filler; a threaded rod and a rotating impeller are installed in the porous cylinder, and the threaded rod is installed between the walls of the purification tank and can drive the rotating impeller to rotate around the central axis of the porous cylinder; the filler inthe cylinder fills the space between the porous cylinder and the rotating impeller, one end of the threaded rod passes through the tank wall to be connected with an electromotor; the tank wall located at the other end of the threaded rod is provided with a material outlet of the porous cylinder; the exterior of the material outlet is provided with a filler recovery basket; and one end of a multifunctional pipe communicates with a cylinder body of the porous cylinder, and the other end passes through the ground of the subsurface flow wetland. The subsurface flow wetland includes the above anti-blocking structure. The structure provided by the invention solves the problem that the filler blocks the purification tank in the wetland, and is simple and easy to operate, and convenient for replacement and washing of the filler.

The invention provides a device for preparing nanometer functional films on substrate surfaces by use of a sol-gel method, which relates to a device for preparing films. The device comprises a precursor liquid container 8, a big container 6, a liquid conduit 14, a high-position precursor liquid bottle 15, a shock absorption base 2 and a bracket 19, wherein a porous cylinder 4 is placed on the bottom of a container and is coaxial with the big container 6; a gap between the big container 6 and the porous cylinder 4 is filled with silica gel to the height of the cylinder; the precursor liquid container 8 is arranged in the cylinder 4 and is coaxial with the big container 6 and the porous cylinder 4; a movable beam is arranged above the bracket; a caliper is arranged on the right side of the beam; and the caliper sticks the high-position precursor liquid bottle 15. The device can be used to prepare uniform transparent nanometer functional films which are firmly combined with surfaces on the cleaned surfaces of the substrate by taking colloidal solution of each component as precursor solution, and is widely used in laboratories for preparing various functional films, such as electrochromic films, transparent conductive films, photocatalytic films, self-cleaning films, photoelectric or electro-optic films and the like.

The invention discloses a roll-to-roll printing electronic ink-jet processing platform based on an air floating roller support. According to the processing platform, an rolling mechanism (1), a tension adjusting mechanism (2), a static air floating roller (4), a tension detecting mechanism (5) and a unrolling mechanism (6) are mounted on the same bottom plate (7C) from right to left successively.A nozzle mounting mechanism is fixed above the static air floating roller. The processing platform replaces a conventional rotating roller by the static air floating roller, generates a gas film between a porous cylinder body and a flexible film, separates the film from the porous cylinder body, eliminates the position error of the film caused by the processing error and assembly error of the rotating drum, and improves the printing accuracy of printing electronic ink-jet printing.

The invention discloses an internally-heated small air water taking device and method based on adsorption. The small air water taking device comprises an adsorption working condition and a desorptionworking condition. Under the adsorption working condition, an air inlet fan works, the air enters a center runner in an inner porous cylinder through an air inlet and radially enters an adsorption bed, moisture absorption of the air is implemented by adsorbent, and the air passes an annular runner and a steady-flow hydrostatic cavity and then discharged. Under the desorption working condition, theair enters the center runner from the air inlet, is heated by a heating bar arranged in the center runner and flows the adsorption bed to heat the adsorbent to take away and adsorbs aggregated moisture, high-humidity air condenses water drops through circular fins, excess heat is taken away by a cooling fan, condensed water drops flow into a water storage tank along a wall surface, and water is taken by the air. The same runner is shared under the adsorption working condition and the desorption working condition, and the air centrifugally and radially flows. The device has the advantages thatthe device is small in size and simple in structure, water can still be taken at low-dew-point temperature, energy is saved and the like.

A solid oxide fuel cell includes an anode layer, an electrolyte layer over the anode layer, and a cathode layer over the electrolyte layer, wherein at least one of the anode layer and the cathode layer defines at least one gas channel, the gas channel containing at least one support structure. The support structure can have a cross-sectional shape of an I-beam, an arch, a tube defining holes along its length, a porous cylinder, or a U-shaped brace. The support structure can be open at a portion of the gas channel most proximate to the electrolyte layer.

The invention relates to a cylindrical shear brace connecting structure for a precast pier and a precast plate. According to the connecting structure, the precast concrete beam plate and the precast concrete pier are connected through a cylindrical shear brace and connecting bolts; the lower end of the cylindrical shear brace is arranged in a pier top cavity and is composed of a backing board, a porous cylinder and a flange plate in a welding mode; the backing board and the flange plate are arranged in parallel; the porous cylinder is welded between the backing board and the flange plate; theflange plate is arranged parallel to the precast concrete beam plate; the connecting bolts penetrate through bolt holes; the upper ends of the connecting bolts are anchored to the top of the precast concrete beam plate, and the lower ends of the connecting bolts are anchored to the flange plate; and after the bolt holes and the periphery of the cylindrical shear brace are plugged, concrete is poured, so that the precast pier and the precast plate can be quickly connected. Compared with the prior art, the connecting structure has the advantages that connecting construction is simplified, the on-site workload is greatly reduced, quick construction site connection of precast concrete members of a factory is realized, and the development of a highway industrial construction technology is promoted.

The present invention discloses a hetero-type methanation catalyst and a molding process and application thereof. The process is as follows: nickel-based synthesis gas methanation catalyst powder is prepared into porous cylinder particles by compression or squeezing, wherein diameter Phi of a profile circumscribed circle of the porous cylinder particles is 3-22mm, height is 3-12mm, ratio of surface area / grain skeleton volume is 0.8-1. 6mm<2> / mm<3>, the maximum radial mass transfer distance is 1.4-4.0mm, and the geometric shape of the porous cylinder particles is regular and symmetrical. The molding process of the hetero-type methanation catalyst aims at process characteristics and requirements of various stages of the synthesis gas methanation process, the utilization efficiency of catalyst active components can be improved, and the hetero-type methanation catalyst has an important role for reducing bed resistance drop and improving long-time operational stability of the catalyst.

The invention relates to a filter residue recycling device for preparing adblue, the filter residue recycling device comprises a barrel, supporting legs, a liquid outlet pipe, a supporting plate, a liquid inlet pipe, an arc-shaped plate, a first rotating shaft, a porous cylinder, a hollow pipe, a filter screen, a driving mechanism and a discharging mechanism, the supporting legs are fixedly connected to the two sides outside the barrel, and the supporting plate is fixedly connected to the middle of one side outside the barrel; and the arc-shaped plate is fixedly connected to one side of the cylinder in a penetrating mode. The liquid inlet pipe is externally connected with the adblue, the liquid outlet pipe is externally connected with the collecting container, the adblue is discharged into the liquid inlet pipe and drives the discharging mechanism to move downwards, when the discharging mechanism moves downwards to the maximum stroke, the adblue is discharged into the porous cylinder, and the filter screen filters residues in the adblue, by twisting the first rotating shaft to rotate reversely, the filter screen can be replaced, and the filter screen can be moved out of the porous cylinder to be cleaned by an operator, so that the operator can conveniently clean the filtered slag, and the next use is not influenced.

The invention relates to a pipe type hydraulic fluid muffler, relating to the hydraulic pipes of hydraulic equipment and being used for solving the noise problem of the hydraulic pipes. The pipe type hydraulic fluid muffler consists a muffler shell and a muffler main body arranged in the muffler shell, wherein an inlet flange, a connecting pipe, an arc joint, a cylinder, a reducer union and an outlet flange of the muffler shell are welded together in sequence, and the inlet flange and the outlet flange are respectively connected in series with the hydraulic pipes at the two ends; and the muffler main body consists of a porous cylinder, a porous cone, a baffle and connecting reinforced plates, wherein the porous cylinder is connected with the big end of the porous cone, the small end of the porous cone is sealed with the baffle, and the connecting reinforced plates are respectively welded between the porous cylinder and the porous cone and between the porous cone and the baffle. Since the pipe type hydraulic fluid muffler is connected in series with the hydraulic pipes, the noise and vibration of a hydraulic system can be lowered and reduced effectively. The pipe type hydraulic fluid muffler has the advantages of novel and simple structure, low cost, good practicality, and the like.

The invention provides a high-pressure fan silencer. A primary silencing porous plate inner cylinder is arranged in the center in a primary silencing outer cylinder, and the lower ends of the primary silencing outer cylinder and the primary silencing porous plate inner cylinder are connected with an air inlet. The upper part of the primary silencing outer cylinder is connected with a diffusion cone outer cylinder, and a diffusion cone inner porous plate is arranged in the diffusion cone outer cylinder. The upper part of the diffusion cone outer cylinder is connected with a diffusion cylinder, a diffusion cylinder inner porous cylinder is arranged in the diffusion cylinder, and the upper parts of the diffusion cylinder and the diffusion cylinder inner porous cylinder are connected with an air outlet. A secondary silencing zone porous cylinder is arranged at the central part in the diffusion cylinder inner porous cylinder and the diffusion cone inner porous plate, and the lower end of the secondary silencing zone porous cylinder is connected with the upper end of the primary silencing porous plate inner cylinder. According to the invention, the combination of more than three silencers is adopted, and ascending air flow is raised by the cone; by arranging upper silencing cotton on an outlet of the secondary silencing zone porous cylinder, dissipative and reactive combination silencing is formed; and by arranging the open type air outlet, the flow rate of the ascending air flow is low, the resistance is small, and a great denoising effect can be realized. The high-pressure fan silencer is not prone to damage and blockage and is convenient to mount and disassemble.

The present invention provides an odorless street drainage device which has the advantages of water drainage, no sand-dust accumulation, no obstruction and automatic isolation to the appearance of fly and mosquito and the stench discharging. The street underground sewage draining passage is installed with a square movable cover plate which is provided with a round hole at the center. A water drainage device is suspended in the round hole. A funnel, a sealing rubber ring, an inverse funnel shaped bottom valve, a spring and a porous cylinder on the water drainage device keep a connection with a certain elastic force from upper side to lower side. As the bottom is an inverse funnel shaped, and even some sand or dust exists on the street or a dust weather appears, no sand or dust will be accumulated when the dirty water flows over the water drainage device and no obstruction will occur. When the water flowing into the water drainage gets to a certain weight, the elastic force for supporting the spring of the bottom valve is overcome and the bottom valve opens downwards therefore the water flows to the underground sewage drainage passage. Because of the function of the elastic force, the inverse funnel shaped bottom valve automatically closes at any moment thereby the invention has extremely important and immediate function for isolating the appearance of the fly and mosquito and stench discharging, blocking the disease source and increasing the people health. The significance is profound.

The invention discloses provides a combustion chamber device for dispersing a high-temperature reflux zone at a boss. The combustion chamber device for dispersing the high-temperature reflux zone at the boss comprises a casing, a flame tube, a fuel channel, an on-duty fuel channel, two fuel inlet channels, radial cyclones, axial cyclones, the boss, porous cylinders and a pressure expanding channel; the flame tube is arranged in the casing and forms an annular cavity with the casing; the fuel channel comprises a fuel spraying nozzle arranged on the casing and an input pipeline connected to thefuel spraying nozzle, and is used for inputting fuel; one end of the on-duty fuel channel is connected with the input pipeline, and the other end of the on-duty fuel channel is positioned at the central position of the head of the flame tube; one end of each fuel input channel is connected with the input pipeline; the other end of each fuel input channel is positioned at the head of the flame tube; the fuel inlet channels are respectively arranged on the two sides of the on-duty fuel channel; the radial cyclones are arranged at outlets of the fuel inlet channels in circumferential directions;the axial cyclones are arranged on the outer side of the on-duty fuel channel in an annular direction; the boss is positioned at the tail end of an inlet sudden enlargement structure of the flame tube; the porous cylinder is longitudinally fixed to the boss; and the pressure expanding channel is formed in the head of the casing and is used for intruding high-speed air flow.