37results about How to "Avoid dust pollution" patented technology

Embodiments of the present invention provide a system for preventing dust-fouling in a computer system. During operation of the computer system, the system monitors the computer system and determines if the computer system is becoming dust-fouled. If so, the system reverses fans in the computer system to circulate air through the computer system in the opposite direction to dislodge and disperse dust from the computer system.

The invention provides a coal mine wet method guniting process and belongs to the technical field of coal mine wet method guniting. The coal mine wet method guniting process comprises the following steps of 1.1 manufacturing mixed dry materials, namely performing dry mixing of a sand and stone mixed material, cement, coal ash, a water reducing agent, fiber and an accelerator to form the mixed dry materials; 1.2 performing dry material transportation, namely transporting the mixed dry materials to a guniting working face under a coal mine; 1.3 manufacturing wet slurry, namely pouring the mixed dry materials into a stirring, conveying and guniting integrated machine and simultaneously adding water to perform stirring to form evenly-mixed wet slurry; 1.4 performing guniting operation, namely utilizing a plunger type wet spraying machine (11) to perform continuous and quick guniting operation to the working face needing guniting; and 1.5 cleaning a pipeline, namely cleaning the guniting pipeline of the plunger type wet spraying machine (11), keeping the pipeline to be clean and preventing blockage. By means of the coal mine wet method guniting process, dry mixing, conveying, stirring, guniting and other processes are tightly combined integrally, the processes are compact, manpower is saved, the efficiency is improved, guniting materials are even and consistent in proportion, and the guniting effect is remarkable.

The invention discloses a method for producing alumina by use of high sulfur bauxite, and the method comprises the following steps: carrying out coarse grinding on crushed high sulfur bauxite, roasting the crushed high sulfur bauxite to enable the sulfur content of the ore to be smaller than 0.7%, and then, directly entering an alumina production flow by use of a Bayer process. After the pre-roasting treatment, the leaching performance of the ore is perfected, a better leaching effect can be obtained without fine grinding, and the energy consumption in a fine grinding process of the ore is reduced, so that the method is beneficial to equipment selection in the roasting process and suitable for treating the high sulfur bauxite. The ore in the invention is roasted at a rough particle size, thus helping the overflow of the generated SO2 (or SO3) gas and ensuring a good roasting desulfurization effect; in addition, by adopting the method disclosed by the invention, the energy consumption in the fine grinding process of the ore is reduced, the over burning and dust pollution problems caused by superfine particle size are avoided, the cyclic utilization of energy source is achieved and the desulfurization cost is reduced.

The invention discloses an aqueous high-content nanometer calcium carbonate dispersoid and a preparation method of the aqueous high-content nanometer calcium carbonate dispersoid. The aqueous high-content nanometer calcium carbonate dispersoid comprises the following ingredients through being metered by the total mass percentage: 40.0 to 60.0 weight percent of nanometer calcium carbonate, 5.0 to 10.0 weight percent of surface modifying agents, 2.0 to 6.0 weight percent of wetting agents, 6.0 to 15.0 weight percent of dispersing agents, 5.0 to 10.0 weight percent of functional additives, 0.2 to 0.5 weight percent of pH value conditioning agents and the balance de-ionized water, wherein the dispersing agents are formed by the self preparation of three polymerizable monomers through reaction. The aqueous high-content nanometer calcium carbonate dispersoid can replace nanometer calcium carbonate powder of the same quantity in the paint preparation process, in addition, the calcium carbonate dispersoid is easily dispersed, and the performance of the paint in multiple aspects of water resistance, washing resistance, stain resistance, construction performance and the like.

The invention relates to a wire surface rust removal polisher. Rust removal polishing is performed on the surface of a wire in the mode that an abrasive belt moves to grind the wire and rotates around the circumference of the wire, the abrasive belt conducts helical motion on the surface of the wire due to linear movement of the wire, and therefore grinding dust removal can be performed on the whole surface of the wire. In addition, removed iron rust can be recycled, and therefore the production cost is lowered; a physical abrasive belt grinding method replaces a traditional chemical electrolysis pickling method, and therefore air pollution is reduced.

Suction ports 4 and 6 and a blowoff port 9 are equipped on a ventilation passage between the suction ports 4 and 6 and blowoff port 9, a heat exchanger 10 and a blower 13 are arranged to an indoor unit proper 1, and air filters 11A and 11B are mounted between the suction port and the heat exchanger. In addition, a ventilation unit 15 which discharges indoor air to the outside is equipped, and air filters have a sweeping unit Z which removes dust adhering to the air filter surfaces and collects it in a dust box. The ventilation unit has a fan casing on which an intake port 31 and an exhaust port 32 are provided, an exhaust fan 35, and a connection hose 55 which communicates with a dust box of the sweeping unit and the ventilation unit, wherein the head end portion of the connection hose is connected to the outer circumferential portion upstream of the exhaust port of the fan casing.

The invention relates to a softening device for treating high-hardness, low-alkalinity salt-containing wastewater and belongs to the field of water treatment in environmental protection. A settling tank and a water-production tank are arranged on a tank body pedestal of the softening device, an inverted stirrer is arranged in the settling tank, a water outlet weir is arranged above the settling tank, a mixing reaction zone and a settling zone are sequentially arranged at the upper part and a lower part of the settling tank, microporous aeration pipes are arranged at the upper part of the settling zone and are communicated by virtue of gas inlet pipes; and water distributors are arranged in the middle of the settling zone and are communicated with water inlet pipes, pipeline mixers are arranged on the water inlet pipes, and chemical agent adding pipes are arranged on the pipeline mixers. According to the softening device, by adding carbon dioxide and caustic soda into the wastewater, chemical agent addition, gas distribution, stirring and reaction are performed in the softening device so that carbon dioxide and caustic soda and calcium and magnesium ions in water are reacted to achieve the removal of water hardness, the utilization efficiency is increased, the dust pollution is avoided, the energy consumption is decreased, the chemical agent cost is saved, the removal rate of the hardness is very high and the reaction is completely performed.

The invention discloses an intelligent, green and environmental-friendly integrated building structure. The intelligent, green and environmental-friendly integrated building structure comprises two partition wall plates, wherein a same first clamping plate is arranged on the two partition wall plates through clamping, a plurality of mobile grooves are formed in one side of the first clamping plateat an equal distance, a mobile plate is connected with inner walls of the mobile grooves in a sliding way, one side of the mobile plate extends to an outer side of the first clamping plate and is arranged between the two partition wall plates, a screw rod is in threaded connection with one side of the mobile plate, a same second clamping plate is arranged at the other sides of the two partition wall plates in a clamping way, and a plurality of installation holes are formed in the second clamping plate at an equal distance. The intelligent, green and environmental-friendly integrated buildingstructure is simple to operate, the screw rod and a nut are connected, thus, the two partition wall plates can be spliced by the first clamping plate and the second clamping plate, a traditional brickwall body can be substituted, and the problem of dust pollution is prevented; and meanwhile, building waste can be effectively reduced, the intelligent, green and environmental-friendly integrated building structure is convenient to disassemble and recycle, and the manufacturing cost is effectively reduced.

The invention provides a novel sand removing method and device. The device comprises a drilling device for sand cleaning and a dust collecting system based on the rotating cutting and crushing principle and the Bernoulli principle. The drilling device mainly comprises a drill bit, a rotating rod and a three-way communicating pipe, wherein the drill bit is connected with the rotating rod, and the rotating rod is used for exerting rotating cutting force on the drill bit to which the drill bit belongs; and the rotating rod connected with the drill bit sleeves the dust suction end of the three-waycommunicating pipe, and the rotating rod is provided with a gap in the dust collecting end of the three-way communicating pipe, so that dust can be prevented from passing through the dust collectingend; the rotating rod is connected with a power source, and the rotating power is provided; and the end a in the other two ends of the three-way communicating pipe is an air inlet end, and the end b is an air outlet end; and a negative pressure is formed at the dust suction end of the three-way communicating pipe when the gas flows from the air inlet end to the air outlet end at a high speed, andthe dust generated by rotary cutting of the dust suction end drill bit is sucked into and enters the dust collecting system from the air outlet end in the flowing direction of the gas. The method aimsto solve the problem of difficulty in sand cleaning in the existing casting production post-treatment process, dust pollution, high noise pollution and the like are solved; and a new method is provided for solving the problems of large dust pollution, large noise pollution and the like.

A lens tube and a mounting base thereof comprise a lens tube for reception of a lens array and a mounting base for accommodation of an image sensor. On an outer periphery of the lens tube is formed a first conical surface, and in the mounting base is formed a concave portion. A second conical surface is formed in the concave portion for mating with the first conical surface of the lens tube. The first conical surface of the lens tube and the second conical surface of the mounting base can cooperate with each other, so as to prevent dust contamination and to make the central axis aligned with the optical axis.

The invention relates to the technical field of plate processing, and discloses a handheld dust-free drilling device for plate processing. The device comprises a device body, a main handle, a switch,a metal nose, and a drilling rod. Three groups of connecting grooves are equidistantly and inwardly formed in the edge of the left side wall of the metal nose; a group of dust absorption sleeves whcihare of a columnar structure are installed jointly on the left sides of connecting columns; through holes are formed in the left side central positions of the dust absorption sleeves and are used forthe drilling rod to penetrate; a circle of driving teeth is fixedly installed on the right part of the outer side surface of the curved surface of a transmission shaft; two groups of horizontal movingrods are rotatably connected with the upper parts and the lower parts of the right side walls inside the dust absorption sleeves; driven teeth which are engaged with the driving teeth are fixedly arranged on a transmission rod positioned at the same vertical positions as the driving teeth; fans are fixedly installed at the left end of the transmission rods; three groups of pump bodies are equidistantly and fixedly installed on the outer side surface of a rotating shaft positioned on the left sides of the driving teeth; and inclined atomization nozzles communicate with the tail ends of the pump bodies. The device has the advantages of dust-free drilling, safety and reliability, and convenient disassembly.

The invention discloses a maintenance equipment management cabinet, which comprises a cabinet body, a protective cover is arranged at the top of the cabinet body, a cabinet door is arranged on one side of the cabinet body, a face recognition device accommodating box is arranged on the back surface of the cabinet door, a display screen is arranged on one side of the face recognition device, one side of the cabinet body is provided with a dryer, drying agent is arranged inside the dryer, a placing plate is arranged inside the cabinet body, a cover plate is arranged above the placing plate, according to the invention, the dryer is arranged, when the dryer is in use, themoisture in the management cabinet is drawn out, after being dried by the internal drying agent, the moisture is discharged to the inside of the management cabinet, the humidity inside the management cabinet is reduced, the problem that the accuracy of the maintenance equipment is affected by the large amount of moisture inthe management cabinet, the cover plate, a sponge and the placing plate are arranged, the cover plate covers on the placing plate, the dust does not fall on the equipment shielded by the cover plate,and the problem that the equipment are polluted by dust is avoided.

The invention relates to a high-pressure descaling spray head which comprises a spray head body. At least one impacting piece is arranged at a water outlet of the spray head body and is connected withthe spray head body through an elastic piece, and the impacting piece is arranged in the range of jet of high-pressure liquid. The impacting piece does a reciprocating motion parallel to the axial direction of the spray head body with the action of the high-pressure liquid and the elastic piece. The high-pressure descaling spray head solves the problems in the prior art that a descaling site is difficult to clean, the environment is polluted seriously, the inner wall of the spray head is easy to wear, and the service life is long. The high-pressure descaling spray head has the following beneficial effects that recycling abrasives and cleaning the site are not needed, the descaling cost is saved, the descaling effect is ensured while the spray head is more environmentally friendly, the service life is prolonged, the water outlet area is expanded, and water mist is prevented from being reversely sprayed so as to not harm a user or affect the vision of the user.

The invention relates to a wet-method atmospheric oxidation method of cerium in rare earth hydroxides to solve technical problems that pretreatment of wet-method atmospheric oxidation methods at present consumes a large amount of water and is time-consuming and labor-consuming. The method provided by the invention comprises following steps of: (1) preparing mixed slurry having a REO concentration of 10-100 h/L of the rare earth hydroxides; (2) adjusting the alkalinity of the mixed slurry to be 0.1-1.5 mol*L<-1>; and (3) feeding compressed air at an air flow rate of 0.5-10 L/min and with an air feeding time of 0.5-10 h. The method provided by the invention is free of complex pretreatment. Quadrivalent cerium (IV) can form stable complexes with F and P, thus achieving an objective of fixing the F and the P in the rare earth hydroxides, reducing water consumption caused by subsequent F washing and P washing, and solving a time-consuming and labor-consuming problem in a washing section. Existence of the F has no influence on oxidation of the cerium. Even with the increase of the content of the P, the oxidation rate of the cerium can also reach 60%-98%.

The invention discloses a chemical pretreatment method and a device thereof for treating high-salinity wastewater and belongs to water treatment technologies. The device comprises an adjusting tank, a pipeline mixer, a sedimentation tank, a V-shaped filter tank and ion exchange resin. The method comprises the following steps: adjusting the high-salinity wastewater in the adjusting tank; mixing the wastewater with sodium hydroxide and carbon dioxide in the pipeline mixer, and then putting the mixture into the sedimentation tank; after reacting for a certain period of time, removing solid suspended matters, hard substances and part of COD (chemical oxygen demand) pollutants from water by virtue of high-efficiency flocculation and sedimentation, and leading a supernatant into the V-shaped filter tank; and putting the high-salinity wastewater obtained after filtration in the V-shaped filter tank into an ion exchange resin softening system, and performing further softening treatment on the high-salinity wastewater. According to the technology, the combination of carbon dioxide and sodium hydroxide is adopted to ensure a good hardness removal effect, reduces the surrounding dust pollution to the utmost extent, and greatly reduces the cost of chemicals.

The invention relates to a centralized optical fiber end grinding and cleaning device which comprises a circulating water tank and a grinding chamber. The circulating water tank is communicated with the grinding chamber through a circulating pump, the grinding chamber comprises a grinding groove, an optical fiber positioning frame, a driving water wheel, at least one grinding roller and a driving device, wherein the cross section of the grinding groove is in a shape of a Chinese character 'ao', the driving water wheel is located at the bottom of the grinding groove, the grinding roller is located in the grinding groove and located under the circulating water level, the optical fiber positioning frame is embedded into the upper end face of the grinding groove, at least four optical fiber positioning holes are distributed in the optical fiber positioning frame in a rectangular array mode, optical fiber positioning clamps are additionally arranged at the positions of the optical fiber positioning holes, and the driving device is located outside the grinding grooves and is connected with the driving water wheel and the grinding rollers respectively. In addition, the centralized optical fiber end grinding and cleaning device has grinding and cleaning functions, the surface cleanness and finish degree of optical fiber ends can be greatly improved, noise and dust pollution easily caused in the optical fiber end grinding process is effectively avoided, and optical fiber machining operation environment is greatly improved.

The invention discloses a concentrated liquid degreasing agent for a silicon steel continuous annealing production line and a preparation method thereof, belonging to the field of silicon steel degreasing cleaning. The degreasing agent consists of the following substances: 20-35% of sodium hydroxide, 0.5-1% of straight-chain alkenyl dicarboxylic acid anhydride, 1-5% of sodium gluconate, 1-5% of sodium polyacrylate, 3-10% of alkyl ethoxy polyglycoside, 0.5-1.5% of ampholytic surfactant, 0.5-2.0% of heterogeneous alcohol ether, 0.3-1.0% of EO/PO block polymer and the balance of pure water; the substances are processed into a degreasing agent by certain steps. When the prepared degreasing agent is applied to the silicon steel continuous annealing production line, the consumption of the degreasing agent is low, the cleaning power is strong, and few bubbles are generated; after cleaning, substance residue on the strip steel surface is avoided; additional antifoaming agent is not added in use, so that the workload of operators is reduced; furthermore, the degreasing agent does not contain pollutants such as phosphorus and sulfur and realizes a good environmental protection effect.

The invention discloses a special Y-cone granulating machine for ceramic/metal powder. The upper end part of a stander is provided with a gear box body, a double-cone cavity body, a heating charging barrel and a pelletizing assembly; the front end part of the heating charging barrel is provided with an extrusion head; the double-cone cavity body comprises a double-cone groove body and a groove body supporting seat, a double-cone extrusion feeding chamber is formed in the double-cone groove body, the upper end part of the double-cone groove body is provided with a feeding hopper, the upper endpart of the groove body supporting seat is fixed with the lower end part of the double-cone cavity body by thread mounting, and a melt glue extrusion chamber is arranged inside the heating charging barrel; a main screw rod driven by a main motor and an auxiliary screw rod driven by the a gear box are arranged in the double-cone chamber, and the main screw rod and the auxiliary screw rod forms an angle to form a double-cone extrusion feeding structure; and a main screw rod extension part is embedded into the heating charging barrel. By adopting the structure design, the special Y-cone granulating machine has the advantages of novel design, high automation degree and high working efficiency, and can effectively relieve the dust pollution in the working environment.

The invention relates to the technical field of coal cinder treatment devices, and discloses coal cinder treatment equipment for cement preparation and a cement preparation method, driven gears are driven to rotate through a driving gear, so that the two meshed driven gears drive a crushing roller to rotate, and coal cinder is fully crushed through the arrangement of a plurality of meshed crushing teeth and interaction teeth; by arranging a dust collection motor, a dust collection fan rotates, dust generated by the coal cinder is sucked into a dust collection pipe through dust collection holes and the like, and the dust is conveyed into a water tank for liquid filtration treatment, so that the dust generated when the coal cinder is crushed can be effectively treated; according to the coal cinder crushing device, dust raising pollution caused by a traditional mode is avoided, through arrangement of an electric sliding block and the like, crushed coal cinder in the flattening box is further ground and refined, discharging is completed through a plurality of discharging holes till the requirement for the caliber of the discharging holes is met, the coal cinder crushing effect is further improved, and the fineness of raw materials needed for mixed cement manufacturing is guaranteed.

The invention discloses a nozzle structure for spraying concrete and belongs to the technical field of nozzles. The nozzle structure is characterized by comprising a first mixing pipe, a second mixingpipe and a spraying pipe which are sequentially connected with a concrete conveying pipe, wherein a plurality of first through holes for introducing an accelerator and air into the pipe are formed ina lateral wall of the first mixing pipe, a drainage plate corresponding to the plurality of first through holes is arranged in the first mixing pipe, a through hole unit which is circumferentially distributed is arranged on the drainage plate, the through hole unit comprises a second through hole extending from the outer side of the upper surface of the drainage plate to the inner side of the lower surface of the drainage plate and a third through hole extending from the inner side of the upper surface of the drainage plate to the outer side of the lower surface of the drainage plate, and thesecond through hole and the third through hole are distributed in a cross mode and are respectively and independently arranged. The nozzle structure disclosed by the invention has the characteristicsthat an inner layer and an outer layer of concrete in the pipe can both contact the accelerant and water, the concrete can be mixed more fully and evenly, and a resilience value of spraying concreteis reduced.

The invention provides a dry pulping system. The dry pulping system comprises a scattering unit, a crushing unit, a material separation unit, an impurity removal unit and a packaging unit, wherein the scattering unit comprises a bale breaking machine; the crushing unit comprises a shredding machine, a scattering and crushing machine and a fiber regeneration machine; the material separation unit comprises a material separation bin and a pulse dust collector; the impurity removal unit comprises a light impurity removal mechanism and a heavy impurity removal mechanism; the packaging unit comprises a screw extruder and a packaging machine; and the bale breaking machine, the shredding machine, the scattering and crushing machine, the fiber regeneration machine and the packaging machine are connected through a belt conveyor. The invention further provides a dry pulping process. The dry pulping process comprises the dry pulping system and further comprises the step that (1) waste paperboards are scattered and fed into the shredding machine for coarse crushing so as to obtain a long-strip-shaped material with a width ranging from 60 mm to 80 mm and a length ranging from 170 mm to 300 mm.

The invention relates to a dust collector host, an internal air duct is provided with a bent air duct path, and the bending direction is the direction back to a holding part; the air duct inlet is formed in the end away from the holding part and is open forwards, an air duct outlet is formed in the tail end of the bent air duct path, and a power system is arranged at the position close to the airduct outlet; and at least one dust collecting device is arranged on the air duct path. The internal air duct of the dust collector host adopts the bent air duct path, so that outlet air of an air outlet of the dust collector host can be blown out away from a user holding the holding part; air exhausted from the air duct outlet is prevented from being directly blown to the user, and the user experience is remarkably improved.

The invention discloses an anti-jamming anhydrous soil removing machine for lumps. The anti-jamming anhydrous soil removing machine comprises a soil removing tank arranged on a rack, wherein a row of soil scraping rollers are uniformly arranged in the soil removing tank at intervals; the axes of the soil scraping rollers are located on the same plane, the plane is obliquely arranged in a front-low and back-high mode, and a separation strip is arranged between every two adjacent soil scraping rollers; a power device for soil scraping is arranged on the rack, the power device for soil scraping drives the soil scraping rollers to rotate through a transmission mechanism for soil scraping, and the rack or the soil removing tank is connected with a material driving mechanism; and a plurality of closed-loop corrugated grooves are uniformly formed in the circumferential faces of the soil scraping rollers in the axial direction of the soil scraping rollers at intervals. According to the anti-jamming anhydrous soil removing machine for the lumps, blocky materials do not need to be dried, washed with water and transported out of a mine field, so that the separation efficiency is improved, the energy consumption and the separation cost are reduced, and the negative influence of separation on environmental protection is greatly reduced; and jamming does not occur in work, so that the effects of reducing the cost and increasing the efficiency are achieved for enterprises, and the anti-jamming anhydrous soil removing machine has positive environmental protection significance for preventing soil depletion of the mine field, protecting the environment and the like.

The invention discloses a purification device for ultrapure rare earth metals. The purification device comprises a furnace body, wherein a heating device is arranged at the bottom of the furnace body,and the furnace body also comprises a cooling plate, a gas outlet, a bottom feeding hole and a temperature control device. The invention also provides a method for purifying ultrapure rare earth by utilizing the purification device, comprising smashing, heating and cooling processes. The device disclosed by the invention is simple in structure and easy to disassemble and maintain, temperature control is accurate and controllable, and temperature control on different heating zones can be carried out according to different rare earth oxides, so that the aim of separating and purifying the rareearth metals is achieved; and the method provided by the invention is simple, process is easy to control, the whole process is short in period, environment-friendly and pollution-free, the prepared rare earth is high in purity, and 1-3 different rare earth oxides can be separated and purified at the same time. The device and method which are provided by the invention are applicable to preparationof the ultrapure rare earth metals.

The invention discloses a carving machine with a scrap collection device. The carving machine comprises a body seat. A sealing door is rotationally connected to the front surface of the body seat through hinges. A fixed plate is welded to the top of the body seat. Two symmetric vertical rods are in sliding connection between the two side walls, in the length direction, of the fixed plate, and a cross beam is welded between the two vertical rods. A limiting rod is welded to the front surface of the cross beam. A fixed seat is in sliding connection to the limiting rod. A carving machine head isfixed to the fixed seat through a bolt. An internal thread sleeve pipe is welded to the position, located above the carving machine head, of the fixed seat. A lead screw is arranged in the internal thread sleeve pipe in a penetrating manner. In the carving machine, a dust collection hood is embedded din the fixed plate and is connected with a dust collection box through a guide pipe, an air suction fan is fixed in the guide pipe, scraps generated by carving of the carving machine head can be sucked by a dust suction hood through suction force generated by the air suction fan to be collected and stored in the dust collection box, and therefore the environment is effectively protected, and dust pollution is avoided.

The invention discloses an ultrasonic device suitable for long-time treatment of magnesium alloy melt. A controller and a probe are included. The probe sequentially comprises an energy converter, an amplitude changing rod, a connecting rod and a tool head. A cooling device is further included. During usage, the probe is arranged in the cooling device. The cooling device comprises a shell and a cooling cavity formed by the shell. The cooling cavity is divided into an upper cooling cavity and a lower cooling cavity which are connected through a through hole. An air inlet is formed in the top endof the upper cooling cavity. An air outlet is formed in the lower portion of the lower cooling cavity. The upper cooling cavity and the lower cooling cavity can be separated. The device is provided with the cooling device, the probe is arranged in the cooling device, and it can be guaranteed that the temperature rise of the probe is little in the long-time magnesium alloy melt treatment process.Different cooling media are selected, the ultrasonic device can adapt to different magnesium alloy casting processes, meanwhile, short-distance melt high-temperature baking and dust pollution to the probe are avoided, and the service life of the probe device is indirectly prolonged.

The invention discloses a building recycling aggregate screening device, which includes a frame, the discharge end of the primary conveyor belt corresponds to the feed port of the screening cavity, and a screening cylinder is arranged in the screening cavity. There are screening rollers rotating in the cylinder, multiple suction pipes are arranged in the suction cavity in sequence, and multiple shift forks are arranged on the outer peripheral wall of the screening roller along the radial direction, and between two adjacent shift forks Ventilation holes are opened between them, and two arc-shaped exhaust cavities with open ends are arranged on the inner wall of the screening cylinder. The discharge port is set between the two exhaust cavities, and the exhaust cavities The open end is completely closed by a filter screen, and multiple exhaust pipes are arranged in each exhaust cavity. The invention can carry out screening and dedusting treatment on the regenerated aggregates, so as to prevent the aggregates from causing dust pollution to surrounding areas during transshipment.

The invention discloses marble slab continuous and uniform grinding equipment which comprises an operation rack. A fixed rack is installed at the top of the operation rack; a cooling water spray headis installed on the fixed rack; a cooling water storage tank is installed on one side of the operation rack; the interior of the cooling water storage tank is connected with a driving water pump through a water guide pipe; a main water supply pipe is installed at one end of the driving water pump; sliding blocks are installed on the surface of a lead screw body; a fixed rack is installed between sliding blocks; a control box is installed on the fixed rack; a movable gear is installed in the control box; a fixed hanging bracket is installed at the bottom of the control box; a driving motor is installed on the fixed hanging bracket; and the lower end of the driving motor is rotatably connected with a grinding machine head through a rotating shaft. According to the marble slab continuous anduniform grinding equipment provided by the invention, two sets of motors cooperate with each other to conduct comprehensive covering type grinding on the surface of a marble slab, meanwhile, a coolingwater spraying device is used for cooling the grinding machine head, and dust particles generated by grinding are subjected to sedimentation treatment.

The invention relates to a novel residue-free closed-type feeding device for breeding. Feed is added into a trough through feeding and feed conveying pipes connected with the trough, the feeding and feed conveying pipes and feed conveying pipes surround a chicken cage, and the feed conveying pipes are connected with two ends of the feeding and feed conveying pipes, so that the space in a chicken farm is saved, and workers work conveniently; the feeding and feed conveying pipes are connected with the closed feed conveying pipes to form a closed feeding mode; a plurality of discharge ports closeto the bottom of the trough are evenly distributed at the lower ends of the feeding and feed conveying pipes, so that only little feed flows into the trough through the discharge ports; along with the continuous feeding by a plug disc chain, the feed eaten by chickens can be supplemented timely, and occupied positions cannot be refilled with the feed; only little feed is stored in the trough while the chickens are fed sufficiently, so that diseases caused by mildewing of a large quantity of the feed are avoided; dust pollution is prevented by the closed adding mode, the chickens are preventedfrom suffering from respiratory diseases, and parasites in the chicken farm are reduced.

The invention relates to the field of ash removal of quench pumps, and discloses an ash discharging device of a quench pump station. The ash discharging device of the quench pump station comprises a tank wall, a bottom plate and a connecting sleeve. The bottom plate is fixedly arranged on the bottom side of the tank wall. The connecting sleeve is fixedly arranged on a tank body directly above themiddle position of the bottom plate. A sealing tube is slidably arranged in the connecting sleeve. An ash removal device is fixedly connected to the lower end of the sealing tube. A through hole is formed in the middle of the bottom plate. The bottom plate sleeves the ash removal device through the through hole. A penetrating ash trough is formed in the radial direction of the bottom plate. A sealing device is sealed on the ash trough. The device solves the technical problem that a traditional cleaning part is easily polluted by ash in the tank body.