89results about How to "Avoid dust pollution" patented technology

An optical device utilized in a laser projector includes a circulatory air channel, a phosphor wheel disposed in the circulatory air channel, a thermal exchanger partially disposed in the circulatory air channel, and an air guiding component disposed in the circulatory air channel for guiding an air provided by the thermal exchanger toward the phosphor wheel. The temperature of the air passing through the phosphor wheel is lower than an environment temperature.

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.

An online data validator is a digital imaging system integrated onto the front side of a printing unit wherein an exit of the printing unit is set on the same side close to the online data validator for a media exiting therefrom. The online data validator comprises a controller facilitating communication with a printing unit controller and controlling overall operation of the online data validator functions; a camera module including a sensor PCB and an optical lens, wherein the sensor PCB contains a camera sensor for capturing 2D digital images of moving labels; and a light source module including a lightbar, a lightbar PCB, a Fresnel lens and a window for providing uniform and flattened illumination on the media.

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.

The invention relates to a dustproof device special for an electric hand drill and the electric hand drill applying the dustproof device. The dustproof device comprises a dustproof cover and a dust discharging plate, wherein the dustproof cover is a bowl-shaped casing formed by a bottom, a peripheral wall and an open end. The center of the bottom protrudes towards the open end to form an annular dust collection chamber between the protruded top end and the peripheral wall, and a through hole penetrating through the bottom and used for being in clearance fit with a drill bit is arranged at the protruded top end. The dust discharging plate is an umbrella-shaped round plate, and the center of the round plate is provided with a locking hole fixed relative to the drill bit. By means of the electric hand drill applying the dustproof device, dust explosion in the hole drilling process is eliminated, and environment pollution and physical and psychological harm caused by the dust produced by hole drilling can be effectively avoided.

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 a quick polishing and polishing device for machinery manufacturing. The quick polishing and polishing device comprises a base and a rack, wherein a sliding rail is installed onthe top of the base, a movable plate is arranged on the top of the sliding rail, a first motor is installed on the movable plate, a three-jaw chuck is connected to the output end of the first motor,a push-pull rod is connected to the left side of the movable plate, a handle is connected to one end of the push-pull rod, a hydraulic cylinder is installed on the top of the rack, a lifting plate isconnected to the output end of the hydraulic cylinder, a second motor is installed at the bottom of the lifting plate, a polishing ball is connected to the output end of the second motor, a dust collector is installed on the top of the rack, and a dust collection bucket is connected to the dust collector through a flexible tube. The three-jaw chuck is arranged, so that a steel tube is accurately positioned; the dust collector is installed on the top of the rack, and the dust collection bucket is arranged near the polishing ball, so that dust generated during polishing and grinding is convenient to absorb, the effect of environmental friendliness is achieved, and dust pollution is prevented.

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.

Disclosed is a multifunctional rubbing machine. The multifunctional rubbing machine comprises a motor, a fan, a base, a spindle, a straw cutting case, a crushing case, a cutter disc assembly, a straw roller assembly and a powder collector assembly. The base is fixedly provided with a motor support, the motor is fixed onto the motor support, and the power output shaft of the motor is provided with a motor belt pulley; the four corners at the bottom of the base are respectively provided with a ground wheel; the spindle penetrates the straw cutting case and the crushing case; the front side and the rear side of the straw cutting case are provided with a feeding hopper and a discharging hopper respectively; the cutter disc assembly is mounted on the spindle; the straw roller assembly is mounted on a left straw roller support and a right straw roller support; the outer side of the straw cutting case is fixedly provided with a belt pulley protecting cover; the crushing case is provided with a crushing discharging hopper, the inside of the crushing case is provided with a hammer piece assembly, the hammer piece assembly comprises a hammer piece rack which is mounted on the spindle and provided with a plurality of hammer piece shafts, and every hammer piece shaft is provided with a plurality of hammer pieces. The multifunctional rubbing machine has the advantages of being simple in structure, attractive and elegant in appearance, high in working efficiency, free from environmental pollution and the like.

The invention provides a production method of niacin/isonicotinic acid granules by extrusion and granulation, comprising the following steps: lifting a hopper to a measuring tank and measuring the materials in the hopper and tabletting the materials in a tablet machine, crushing, screening the tablets to obtain the granular niacin/isonicotinic acid product with grain size of 0.2-0.8mm, respectively returning the over-large or over-small granules into the crushing and measuring step. The niacin/isonicotinic acid granules prevents the defects of the niacin/isonicotinic acid powder produced by the prior production method such as severe dust pollution of package, application place due to over-small grain size and grains cluster phenomena in storage and transportation and provides the convenience for the use of the niacin/isonicotinic acid granules as additives.

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.