270results about How to "Filter evenly" patented technology

The invention discloses rotational flow blowing type self-cleaning anti-blocking dust collection equipment, which comprises a purification dust collection tank body, rotation flow blades, a deflectorouter tube, a filtering tube and a rotating nozzle, wherein the deflector outer tube is arranged on the top end of the purification dust collection tank body, a deflector inner tube is arranged in thedeflector outer tube, a through hole is formed in the side wall of the middle part of the deflector inner tube, a driving axle is arranged inside the deflector inner tube, and the bottom end of the driving axle is connected with a diversion pipe through a coupling; the diversion pipe is vertically arranged in the purification dust collection tank body, and the filtering tube is arranged in the purification dust collection tank body outside the diversion pipe; a plurality of rotational flow blades are arranged on the side wall of the diversion pipe at equal intervals, the outer sides of the rotational flow blades are connected with a cleaning brush. The rotation of the driving axle and the diversion pipe cannot be influenced while air conveniently flows in; the dusty air can be evenly filtered conveniently through the filtering tube, the even filtering pressure situation can be avoided, the filtering effect of the filtering tube can be enhanced, the dust aggregation effect can be improved, and the dust collection is facilitated.

The invention discloses a waste plastic recycling system, and aims to overcome the defects that in an existing waste plastic recycling system, structure is complex, process is cumbersome, washing of waste plastic raw materials is needed, recycling cost of waste plastics is high, a utilization rate of the plastic raw materials is low, and harmful gas produced in the recycling process of the waste plastics can pollute environment. The waste plastic recycling system comprises a feeding device, an extrusion device, a discharging device and a dust suction device which are connected in sequence. The feeding device enables the waste plastic raw materials to be delivered to the extrusion device without washing, investment of washing devices is eliminated, recycling cost of the waste plastics is reduced, and the utilization rate of the waste plastic raw materials is increased. Due to the fact that the discharging device is designed in a closed mode, the waste gas is led into the dust suction device, and the environment is not polluted. Besides, flue-gas temperature is low in the recycling process of the waste plastics, no harmful gas such as dioxin is produced, and the waste plastic recycling system is environment-friendly.

The invention relates to a silt solidification processor which is characterized in that a stirring chamber is arranged at the lower part of a frame, two spiral stirring shafts which rotate relatively are arranged in the stirring chamber, the stirring shafts are driven by a main motor to rotate, two feed ports are arranged above the initial segment of the stirring chamber, one feed port is a silt feed port used for carrying out series connection and transportation through a silt conveyor belt, a silt hopper and a silt conveying spiral shaft, and the other feed port is a solidifying agent feed port used for carrying out the series connection and the transportation through a solidifying agent conveyor belt, a solidifying agent hopper and a solidifying agent conveying spiral shaft; and a discharge port at the tail end of the stirring chamber is arranged above a silt solidifying pond. The silt solidification processor has the advantages that the structure is compact and reasonable, the occupied area is small, and the problem that the silt solidification processor in the prior art is in a large structure requiring a lifting mechanism for conveying a solidifying agent can be improved. A flap filtering device is arranged at the inlet of the silt hopper, thereby effectively filtering and removing large solid impurities in silt in time, preventing blockage and damages to equipment and realizing low failure rate.

The invention relates to cotton, wood and bamboo composite pulp phase-change microcapsule viscose and a preparation method thereof, belonging to the viscose field. The phase-change microcapsule comprises 80-250 parts of methyl methacrylate, 80-150 parts of phase change paraffin, 2.5-6 parts of an emulsifying agent, 0.5-1.5 parts of azo initiator, and 300-400 parts of deionized water. According to the invention, cotton, wood and bamboo composite pulp is used for preparing spun-viscose for producing the cotton, wood and bamboo composite pulp phase-change microcapsule viscose, and steps such as alkali steeping, aging, yellowing, dissolving and the like during the viscose production process are optimized. The microcapsule disclosed by the invention has a uniform grain size, is suitable for producing composite viscose and capable of remarkably improving the quality of the viscose and the spinnability with small influence; moreover, the prepared viscose not only has a natural moisturizing and ventilating effect of composite bamboo pulp fiber, but also has the function of accumulating heat and adjusting temperature.

The invention discloses a filter and a washing machine. The filter and the washing machine are designed for solving the problems that the existing filters are not even in filtration and cannot be cleaned automatically, and the like. The filter comprises a filter cylinder body and a filter screen. The cylinder body is provided with a water inlet, a water outlet, and a sewage discharge port. The filter screen is installed inside the cylinder body and the filter screen separates the inner cavity of the filter cylinder body into two portions including an internal containing cavity and an external containing cavity. The upper end of the internal containing cavity is connected with the water inlet; the lower end is connected with the sewage discharge port. The external containing cavity is connected with the water outlet. Sewage flows into the internal containing cavity from the water inlet, and then enters the external containing cavity after being filtered by the filter screen; and then the sewage is discharged through the water outlet. The filtered impurities are discharged through the sewage discharge port. The filter is even in filtration, and easy to deposit the impurities. The washing machine having the filter is able to filter the water for washing clothes in circulation, and is able to discharge the filtered impurities automatically, thus saving plenty of water resources.

The invention discloses an adhesive feeding device for punched felt production. The adhesive feeding device for punched felt production comprises a feeding box, wherein a charge port is fixedly formedin the left-side end surface of the feeding box; a discharge port is formed in the bottom of the feeding box; a sieve screen is fixedly installed in the feeding box; and a crushing component is arranged above the sieve screen. According to the adhesive feeding device for punched felt production, through arrangement for a shifting roll, the sieve screen, a guide plate and the like, influence on the quality of a punched felt due to the adhesion agglomeration of an adhesive is avoided; the effects of an adjustable discharge speed and more uniform discharge are achieved; and the problems that thepowdery adhesive is easily adhered to form large block-shaped particles, and the large block-shaped particles are blocked in the feeding device or the discharge port, so that continuous and uniform discharge for the powdery adhesive is not benefited, and the discharge speed for the adhesive needs to be adjusted as needed, and a common flow adjustment valve is extremely easily blocked, so that normal running of production cannot be realized, and the working efficiency is influenced, are solved.

An integrated lightweight filter-material water treatment filter tank is characterized by comprising at least a water treatment unit. The water treatment unit comprises a tank. The tank is composed of a clear water area, a filtering area and a water inlet area which are communicated with each other through water-flow from the top to the bottom. Adjacent two areas of the above three areas are isolated through a filter board respectively. The filter board is provided with several water channels used for water flowing. The water inlet area has a water inlet used for receiving sewage to be filtrated. The filtering area holds several lightweight elastic filter material particles which have lower density than water. Particle size of the lightweight elastic filter material particles is greater than width of the water channels. After water-flowing, each lightweight elastic filter material particle forms a filter layer, and there is a gap between the filter layer and the lower filter board. The top of the clear water area is an overflow surface of clear water. The filter tank has advantages of good filtering effect, low backwashing requirement, high reliability, low cost, low operation cost, less land occupation and convenience in operation management.

The invention provides a water treatment device and method for cleaning the same, which can reduce the ratio of cleaning water volume to the treated water volume (filtered water volume), thereby can improve water treatment efficiency and cause the structure compacter and simplier. A water treatment device comprising: a jet nozzle (7) for mixed raw water flow; a filtration tank (5) for containing a filtration material layer (4) which comprises two layers which are an upper layer (2) and a lower layer (3) and are arranged below the jet nozzle for mixed raw water flow, the upper layer consisting of filtration materials having a smaller specific gravity and a greater particle diameter than the filtration materials of the lower layer; a water collecting / distributing pipe (13) for extracting filtered water and supplying reverse washing water to the filtration material layer in reverse washing operation; a filtration material vibrating means for vibrating each particle of the filtration materials, the filtration material vibrating means being provided with a vibration element (9) connected to the power source and also with vibration expansion elements (10) embedded in the upper layer (2) in such a manner that the vibration of the vibration element (9) is transmitted to the vibration expansion elements (10); and a drainage trough (12) provided above the filtration material layer.

The invention discloses an ultrafiltration membrane filtering device. The ultrafiltration membrane filtering device comprises a shell, a central tube, a plurality of membrane wires and a plurality of ultrasonic probes, wherein the shell is a hollow tube which has an Achimedean spiral plane structure; a first opening is formed in one end of the outside of the shell; a second opening is formed in one end of the inside of the shell; the central tube is a hollow tube which has an Achimedean spiral plane structure and is coaxially arranged in the shell; one end of the outside of the central tube penetrates out of the first opening so that sewage can be guided in the central tube; one end of the inside of the central tube is closed; a plurality of through holes are formed in a wall of the central tube; each of the membrane wires has an Achimedean spiral plane structure; the membrane wires are arranged in a gap between the shell and the central tube; one end of the outside of each membrane wire is closed; one end of the inside of each membrane wire penetrates out of the second opening so that pure water can be guided out of the device; and the ultrasonic probes are fixed on the outer surface of the shell and are connected with an ultrasonic generator through leads respectively. The ultrafiltration membrane filtering device is compact in structure, high in space utilization rate and high in sewage treatment efficiency.

The invention discloses an iron-carbon micro-electrolysis device and a use method thereof, and belongs to the field of environmental engineering waste water treatment. The iron-carbon micro-electrolysis device comprises a pressure atomizing system, a micro-electrolysis tower, a stirring impeller, a water distribution system, a water storage pond, a centrifugal dehydrator and a control system. An up-flow water inlet mode is adopted, stirring and friction actions of filler and sewage in the horizontal direction and in the vertical direction are increased by means of rotation of the impeller and even water distribution of an annular water distribution pipe, the common problems that according to an existing iron-carbon micro-electrolysis reactor, an iron-carbon bed is blocked, hardened, passivated and the like are solved, meanwhile, effective contact of waste water and the iron-carbon bed is increased, and the treatment effect is enhanced. By means of the device and the method, bubbles generated in the micro-electrolysis device can further be effectively eliminated, secondary pollution caused by iron mud to environments is reduced, and the device and the method have the advantages that the structure is simple, design is reasonable and the sewage treatment effect is good.

The invention discloses a large air purifier and a city air purification layout system formed by large air purifiers. The large air purifier comprises air inlet ducts, an air filtering channel and an air outlet duct, wherein the air inlet ducts, the air filtering channel and the air outlet duct are successively connected from front to back; an air filtering device is arranged in the air filtering channel; fans are arranged in the air inlet ducts and / or air filtering channel; and the at least two air inlet ducts are communicated to the front end of the air filtering channel in a branched mode. The city air purification layout system comprises the large air purifiers, wherein the large air purifiers circularly surround and are arranged at intervals; an air purification ring is formed; and an air inlet duct and an air outlet duct are respectively positioned on the outer side and the inner side of the air purification ring. The invention discloses the large air purifier which is installed on the reasonable distribution point in the city to purify city air and lower the particulate matter (PM) index, and the city air purification layout system formed by the large air purifiers.

The invention discloses an ore vibrating screen for ore mining. The ore vibrating screen comprises a bottom plate, a first filtering device, a knocking device, a bracket device, a second filtering device and a motor device, wherein a first bracket, a first bending rod and a recycling box are arranged on the bottom plate; the first filtering device comprises a first frame body, a first filter mesh and a vibrator; the knocking device comprises an electric cylinder, a second bracket, a first pushing rod, a first cross rod, a first inclined rod and a knocking rod; the bracket device comprises a third bracket, a second cross rod, a second inclined rod and a first vertical rod; the second filtering device comprises a second frame body, a first fixing block, a discharge hopper, a roller, a second filter mesh, a first fixing ring and a pull line; the motor device comprises a fourth bracket, a fifth bracket, a fixed pulley, a motor, an output shaft, a sixth bracket, a first fixing rod, a third inclined rod and a second fixing rod located under the third inclined rod. The ore vibrating screen provided by the invention can effectively screen ores, and has high screening efficiency and speed.

The invention discloses a biomass waste processing device, comprising a base, a grinding box, a collection box, a rotating disc, a swing rod, a grinding roller, a guide plate and an adjusting rod. A guide is provided on the right side plate of the grinding box. A sliding sleeve, a push-pull rod is arranged through the guide sliding sleeve, and the left end of the push-pull rod is pivotally connected to the middle of the swing rod through a hinged connection. The bottom end of the swing rod is fixedly installed with a U-shaped bracket, which is rotated through a bearing connection A rotating rod is provided, the grinding roller is fixedly installed on the rotating rod, the right end of the push-pull rod is fixedly installed with a movable sleeve, the outer ring surface of the rotating disc is also fixedly installed with a lever, and the inner cavity bottom plate of the grinding box is provided with a filter. network. The invention has the advantages of simple structure, convenient use and convenient operation, can realize sufficient grinding of biomass materials, has good grinding effect and high efficiency, is convenient for collection, and is suitable for popularization and use.

The invention discloses a filtering apparatus for lubricating oil production. The apparatus comprises a filter box, a first filter screen, a second filter screen and a third filter screen are sequentially connected to the inner side of the filter box from top to bottom, the side end of the filter box is connected with an oil guide tube, a dredging type feeding device is connected to one end, awayfrom the filtering box body, of the oil guide tube, the upper end of the filtering box is connected with a sealing cover, the upper end of the sealing cover is connected with a stirring driving device, a through hole is formed in the center of the sealing cover, the power output end of the stirring driving device penetrates through the through hole and is connected with a rotating shaft, the sideend of the rotating shaft is connected with a plurality of stirring blades, a dredging mechanism is arranged at the top end in the filtering box body, an auxiliary funnel is connected to the lower endof the filtering box body, an oil outlet tube is connected to the lower end of the auxiliary funnel, the rotating shaft and the stirring blades are magnetic blocks, the magnetic blocks can effectively adsorb iron impurities in lubricating oil, and the stirring driving device drives the magnetic blocks to rotate in order to achieve a good adsorption effect. The apparatus has a simple structure, and improves the lubricating oil filtering efficiency while ensuring the lubricating oil filtering quality.

The invention discloses a brake pad machining grinding machine capable of removing chippings conveniently, and relates to the technical field of grinding machines. The grinding machine comprises a chipping collecting box, a workbench and a polishing case; the top of the chipping collecting box is fixedly connected with the bottom of the workbench; supporting frames are fixedly connected between the front side and the rear side of the chipping collecting box, and the tops of the inner surfaces of the supporting frames are fixedly connected with the surface of the polishing case; a machining table is fixedly connected to the middle of the top of the workbench; an annular strip is fixedly connected to the position, located outside the machining table, of the top of the workbench; and a bafflering is movably connected to the top of the annular strip. According to the brake pad machining grinding machine capable of removing the chippings conveniently, by arranging the annular strip to be matched with the baffle ring, air blown in air feeding notches formed in the two sides can flow along the gap of the annular strip, the chippings in the gap are discharged through an air exhaust notchand then discharged into the chipping collecting box to be collected through a dust collection pipe, and thus, the chippings on the workbench can be easily and conveniently removed.

The invention relates to a portable step-by-step water sample suction filtration system. The system comprises two filters, a guide pipe, a suction filtration bottle, a portable box, a first suck-press latex tube, a second suck-press latex tube and a third suck-press latex tube, wherein a corresponding water system micropore filtration membrane is arranged in each filter; the two filters are detachably communicated with upper and lower ports of the guide pipe in a sealed manner respectively; a vacuum pump and a storage battery for supplying electric energy to the vacuum pump through a power switch are placed in the portable box; one end of the first suck-press latex tube and one end of the second suck-press latex tube are detachably communicated with the guide pipe and the suction filtration bottle in a sealed manner, the other ends of the first suck-press latex tube and the second suck-press latex tube are joined and connected to the end part of the third suck-press latex tube communicated with the vacuum pump. By means of the suction filtration system, particle suspended matters / microorganisms with different particle sizes or pore sizes in a water sample can be separated on the field site, following research is met, and besides, the system can be used for collecting water samples filtered step by step.

The invention relates to the technical field of industrial waste gas treatment, and particularly discloses an environment-friendly industrial waste gas purifying device. The environment-friendly industrial waste gas purifying device comprises a work table, a cyclone separator, an alkaline packed tower and an acid liquor tank, wherein the cyclone separator, the alkaline packed tower and the acid liquor tank are installed on the upper surface of the work table, the cyclone separator is communicated with a gas inlet pipe, the top of the cyclone separator is communicated with a gas outlet pipe, the bottom of the gas outlet pipe is provided with a filter assembly, and a cleaning assembly is arranged on the portion, below the filter assembly, on the top in the cyclone separator. The bottom of the cyclone separator is communicated with a collection box, the collection box is fixedly arranged in the work table, the gas outlet pipe is communicated with the acid liquor tank and the alkaline packed tower through gas pipes in sequence, and the bottoms of the gas pipes are provided with gas shower nozzles. By using the alkaline packed tower and the acid liquor tank, acid gas and alkaline gas inwaste gas are absorbed, harmful ingredients are fully absorbed, and the treatment quality is high. The device has the advantages of being simple in structure, convenient to operate, low in treatmentcost, good in effect and convenient to maintain and facilitating application and popularization.

The invention relates to filtering equipment, in particular to filtering equipment for biological pharmacy. The invention aims to provide the filtering equipment for biological pharmacy, which can realize uniform filtering, is simple to operate and can conveniently take out residues. According to the technical scheme, the filtering equipment for biological pharmacy comprises supporting legs; first mounting plates, wherein the two sides of each supporting leg are connected with the first mounting plates; a discharging frame, which is connected between the first mounting plates; a filtering mechanism, which is arranged in the discharging frame; and a discharging mechanism, which is arranged on the discharging frame. Through cooperation of the filtering mechanism, the discharging mechanism and a rotating mechanism, the effect of interval discharging can be achieved, and meanwhile medicines can be evenly filtered.

The invention provides a movable type oil-water separator. The movable type oil-water separator comprises a cuboid-shaped box body, wherein travelling wheels are arranged at the bottom of the box body; the box body is internally provided with a first chamber, a second chamber, a third chamber and a fourth chamber in sequence from left to right; the top of the first chamber is communicated with the top of the second chamber; the bottom of the second chamber is communicated with the bottom of the third chamber; the top of the third chamber is communicated with the top of the fourth chamber; a water inlet pipe connector, which is communicated with the first chamber, is arranged at the lower part of the left side of the box body; an oil collection box is arranged at the upper part of the front side of the box body; a rotary type oil conveying pipe assembly, which stretches into the oil collection box, is arranged in each of the first chamber and the second chamber in the box body. The movable type oil-water separator provided by the invention can be used for effectively separating oil-water mixed sewage and the like and reducing the pollution degree of a water body, so that the quality safety of the water body is ensured and the water use safety of production and life of coastal urban residents is ensured.

The invention discloses a water purifier pressure regulating pump control method and a water purifier. The method comprises the following steps: acquiring the TDS value and the temperature value of raw water at the upstream of a pressure regulating pump and the original voltage value of the pressure regulating pump after a water purifier starts to produce water; making the water purifier acquire the actual pure water quantity currently generated by the water purifier, and when the actual pure water quantity reaches a preset pure water quantity, making the water purifier calculate a theoreticalvoltage value needing to be adjusted by the pressure regulating pump according to the TDS value of the raw water, the temperature value of the raw water, the original voltage value of the pressure regulating pump and the actual pure water amount generated by the water purifier, and adjusts the original voltage value of the pressure regulating pump to be the theoretical voltage value, so that theraw water subjected to water pressure adjustment by the pressure regulating pump has a proper water pressure value. According to the invention, the self-voltage value is self-adaptively adjusted through the pressure regulating pump according to parameters such as water quality conditions, water temperature and the like of different regions, so that the noise of the water purifier is reduced, and the service life of the reverse osmosis membrane unit in the water purifier is prolonged.

Disclosed is environmentally-friendly treatment equipment for compound microbial fertilizer waste liquid. The equipment comprises a base plate, a bracket device, a frame device, a filtration device, a support device and a pulling device, the base plate is provided with universal wheels, a recycling box and a positioning block, the bracket device comprises a support rod and a positioning rod, the frame device comprises a frame body, a discharging pipe, a valve and a sponge block, the filtration device comprises a movable frame, a feeding frame, first fixing rods, a spring, a filtration net, an elastic rod and a movable column, the support device comprises a support plate, a second fixing rod, a vertical rod, a roller, and the pulling device comprises a motor, an output shaft and a pulling line. According to the environmentally-friendly treatment equipment for the compound microbial fertilizer waste liquid, the waste liquid generated in the production process of compound microorganisms can be filtered thoroughly, the filtration effect is good, the occurrence of blockage can be prevented, it is ensured that filtration is conducted smoothly, and the filtration efficiency is improved.

The invention discloses a water quality detection solid-liquid impurity separation device. The device comprises a water quality detection sampling vehicle, an impurity first-level filter, a second-level filter and a water quality detection sample pot. Mobile wheels are fixedly mounted at the bottom of the water quality detection sampling vehicle, and the impurity first-level filter and second-level filter are fixedly mounted at the top of the water quality detection sampling vehicle. The solid-liquid impurity separation device provided by the invention has good solid-liquid impurity separationeffect, and is energy saving and environment-friendly, separates and removes solid impurities from detected water by filtering, reaches the purpose of purifying the detected water sample, acquires anon-turbid detected water sample, eliminates the influence of detected water turbidity on the water quality detection result, effectively improves the water quality detection accuracy, effectively lowers the labor intensity of water quality detection staff, ensures smooth filtering of the impurity first-level filter, and by scrubbing an impurity filtering mesh plate, the internal cleanness of theimpurity first-level filter can be guaranteed, and the solid-liquid impurity separation and filtering quality of the impurity first-level filter on the detected water can be improved.

The invention relates to a steamed noodle production line and a noodle steaming machine thereof. The steamed noodle production line comprises a raw noodle processing device and a steaming machine. The steaming device comprises a first noodle steaming machine, a water-absorbing and anti-lumping device and a second noodle steaming machine, which are arranged sequentially and are all provided with an independent net belt conveying mechanism. A noodle input end and a noodle output end of adjacent net belt conveying mechanisms are jointed with each other. A spraying device which sprays towards a conveying net belt is erected between the first noodle steaming machine and the water-absorbing and anti-lumping device. The first noodle steaming machine and the second noodle steaming machine are all provided with a steam box and at least one liner arranged in the steam box. Two ends of each liner are all provided with openings used for penetrating the conveying net belt. The inner cavity of the liner is a transmission passage of the conveying net belt. Input edge net belts of the net belt conveying mechanisms of the first noodle steaming machine and the second noodle steaming machine respectively pass through the transmission passages of the conveying net belts of respective liners. The space of the steam box outside the liner is a steam chamber. Steamed noodle produced by the steamed noodle production line and the noodle steaming machine thereof has high water content, is soft and pliable and has good taste.

The inVention discloses a moxibustion machine. The moxibustion machine comprises a main machine assembly for purifying moxibustion smoke, a cantileVer assembly for connection and a moxibustion box assembly for burning moxa, wherein the main machine assembly, the cantileVer assembly and the moxibustion box assembly are sequentially connected; the bottom of a smoke feeding tube is fixedly installedon the top face of a machine box, a filtering assembly is installed in an inserting grooVe of the machine box, and a main machine head is slidingly connected with a manual cantileVer part through a right connecting coVer; the manual cantileVer part is slidingly connected with an automatic cantileVer part through a left connecting coVer, and the automatic cantileVer part is slidingly connected witha main support; a smoke discharging tube penetrates through the cantileVer assembly; the moxibustion box assembly comprises a connecting assembly and a moxibustion box, and the connecting assembly isfixedly arranged on the top face of the moxibustion box. By means of the moxibustion machine, the moxibustion smoke can be purified, the enVironmental comfortable degree of the moxibustion process isimproVed, the whole structure is reasonable, moxa sticks are rapidly and conVeniently replaced, and the burning process and the moxibustion process are safe and reliable.

The invention discloses a method for detecting melamine in a milk product. The method comprises the steps that melamine in a sample is extracted, and an extracting solution is obtained, wherein melamine in the sample is ultrasonically extracted through trichloroacetic acid-acetonitrile, the first extracting solution is obtained, first centrifugation is carried out on the first extracting solution, first supernate is obtained and filtered, filter liquor is obtained, second centrifugation is arranged on the filter liquor, second supernate is obtained, and the centrifugal speed of first centrifugation and the centrifugal speed of second centrifugation are not lower than 4,000 r / min; the extracting solution is purified, purified liquor is obtained and a solid-phase extraction column is adopted during purification; high performance liquid chromatography is utilized for detecting the purified liquor to detect melamine in the milk product. The invention further discloses a method for increasing the detecting and recovery rate of melamine. By means of the method, the detecting and recovery rate meeting the national standard can be conveniently obtained.

The invention discloses a dust and waste gas cleaning and dedusting system which comprises a waste gas conveying device and waste gas flow control devices fixedly installed on the two end faces of the waste gas conveying device. The waste gas conveying device internally comprises a supporting base, a dust removal device, a control device, bearing pedestals, a waste gas pipeline, inserting grooves, a groove, arc-shaped plates and a driving motor, the arc-shaped plates are symmetrically welded to the two side faces of the supporting base, the control device is slidably mounted in the center of the upper surface of the supporting base, and the waste gas pipeline is welded to the center of the top surface of the supporting base; the bearing pedestals are symmetrically welded to the outer surfaces of the edges of the two ends of the waste gas pipeline, and the inserting grooves are evenly formed in the outer surface of the waste gas pipeline. Through rotation control of the dust removal device, the filter plate in the waste gas pipeline can be quickly replaced, so that the shutdown time of the waste gas conveying device is prolonged, and unqualified dust removal of waste gas is prevented.

The invention specifically relates to a method for preparing acetylated distarch phosphate modified starch, belonging to the technical field of preparation of modified starch. The preparation method uses waxy corn starch as a raw material, sodium trimetaphosphate as a crosslinking agent and acetic anhydride as an esterification reagent, and prepares the desired acetylated distarch phosphate modified starch through crosslinking-acetylation reactions. The performance of the prepared acetylated distarch phosphate modified starch meets the requirements of market application fields thereof.

Environment-friendly novel sewage treating and filtering equipment comprises a frame device, a first filtering device contained inside the frame device, a second filtering device arranged below the first filtering device, a first electric cylinder device arranged on the frame device, a second electric cylinder device and a third filtering device arranged below the second filtering device. The equipment is low in cost and using cost, can sufficiently filter sewage, thereby being good in filtering effect, can make the sewage to flow periodically, and can prevent impurities from blocking filtering holes, thereby being capable of ensuring smooth filtering and filtering effect.

The invention discloses a dustproof filtering structure comprising an outer filtering net which is of a stereoscopic shape, an outer filtering net bracket which is of a stereoscopic shape, is used for fixing the outer filtering net and is provided with an air inlet, an inner filtering net which is of a planar shape and is close to an air inlet of a projector, and an inner filtering net bracket which is assembled together with the outer filtering net bracket and is connected with a projector shell. The dustproof structure of the invention is stereoscopic. When air flow passes through the air inlet and the stereoscopic filtering nets, dust, impurities and other particles in the air flow cannot accumulate on the filtering nets, so that the possibility that filtering holes are blocked and the blocked area of the filtering holes are reduced, air can smoothly pass through the inner filtering net, and much less dust is filtered by the inner filtering net. Therefore, the dustproof effect is enhanced, the service life of the filtering nets is prolonged, the workload of filtering net replacing and cleaning is reduced, and various electronic elements and optical elements of projectors are protected.