2719 results about "Dust abatement" patented technology

The invention relates to an automatic powder spraying line for automobile wheel hub finishing components and a technique thereof; the production line comprises a pure water filtration system for providing pure water for the power spraying line, a pretreatment device, a pretreatment water content drying device, an automatic dust blowing device, an automatic powder spraying device, a solidifying device and a conveying lead rail; wherein, the pretreatment device sequentially comprises a pickling tank, alkaline wash tank and a passivation tank; the automatic powder spraying device comprises a tank body, a powder spraying gun, a powder storage tank, a powder sucking device, a constant temperature and humidity device. The production technique has the following steps: 1) alkali degreasing, 2) product surface cleaning, 3) drying, 4) dust abatement, 5) power spraying, 6) solidification. The production line of the invention features high degree of automation, suitability for mass production, high output benefits and low cost; in addition, the production technique equipped with the production line is more reasonable, components produced by the coating method of powder spraying has more uniform surface color and thickness.

The invention relates to an electrostatic precipitator of an efficient dust collecting electrode, comprising a shell which is provided with an airflow inlet and an airflow outlet. A discharge electrode and a dust collecting electrode are arranged in the shell. Wherein, the dust collecting electrode comprises a hollowed-out metal shell, and a dust collecting plate or a dust collecting sphere or an alveolar porous plate which is filled in the shell and manufactured by porous metallic foams or porous foam plastics processed via conductive treatment, and the dust collecting plate or the dust collecting sphere moves between an integration chamber and a dust cleaning chamber. The electrostatic precipitator of the efficient dust collecting electrode of the invention selects the porous metallic foams or the porous foam plastics processed conductive treatment, to manufacture a flat type, a granular type or an alveolar porous type to fill in the shell of a metal framework or a reticular formation to manufacture the dust collecting electrode with different structures such as rotary type, flat brattice type, circular flow type and so on, and at the same time separates a dust collecting area and a dust cleaning area to make dust collection efficiency of the electrostatic precipitator reach to more than 99.99%. The dust collecting electrode of the invention is particularly applicable to the last stage of the electrostatic precipitator, wherein, after dust abatement, dust content of the gas per cubic meter is less than or equal to 10mg.

The invention relates to a wet-dry mixing electric dust remover. The electric dust remover mainly consists of an inlet smoke box, an air flow uniformly-distributing plate, a shell, a cathode line, an anode plate, an outlet smoke box, an outlet trough-shape plate, a rapping device, an ash bucket, a water distribution device and a water tank. The electric dust remover is characterized in that the upstream in the inflow direction of the smoke gas or the exhaust gas is provided with a dry-type ash removal electric field which adopts mechanical rapping, electromagnetic rapping or acoustic wave to remove the ash, the last electric field is a wet-type ash removal electric field which adopts a water film to remove the ash, the dry-type ash removal electric field and the wet-type ash removal electric field are arranged in the same shell, and the wet-type ash removal electric field is connected with an ash removal water treatment recycling system. The invention integrates the advantages of the dry-type electric dust removal and the wet-type electric dust removal, efficiently removes dust, ensures emission standards and minimizes the corrosion protection investment caused by the wet-type ash removal, the water treatment equipment investment and the running cost.

A process for desulfurizing and dusting high-temp gas features that the metallic oxide as desulfurizing agen is used as filter medium, the composite moving particles bed is used as filter, and the particles move downward and gas passes transversely through the particle layer to remove gas-state sulfide and dust. Said composite particles-moving bed has upper and lower layers and the gas passes through the particle layer upward.

The invention relates to a method for preparing fuel gas by gasifying biomass materials and a device thereof, belonging to the technical fields of methods for preparing fuel gas by solid biomass materials in a gasifying process and the devices thereof. The method comprises the following steps: feeding, gasifying, dedusting, spraying and purifying, detarring, pumping front-end gases and conveying rear-end fuel gas by a Roots blower, and conveying the fuel gas to a fuel gas storage cabinet through a tempering preventing device. The device realizing the method comprises a feeding mechanism, a controllable gasifying furnace and a circulation water pump, a gravity deduster, a spraying purifier and a spraying pump, a biomass tar purifier, the Roots blower, the tempering preventing device and thefuel gas storage cabinet. The device is used for transforming the solid biomass materials of straws and the like into the fuel gas with less impurities and high heat value and supplying the fuel gasfor users centrally.

The invention relates to an efficient wet-type variable flow fog-spraying sprinkling dust-removing purification device comprising a washing tower, wherein the lower end of the washing tower is provided with a smoke inlet tangent with the washing tower; a center steady flow column is arranged in the middle of the lower end of the washing tower to form an annular channel with the washing tower; a fog condensation trapping area, a sprinkling washing area and a dehydration demisting area are arranged above the steady flow column from bottom to top; a variable flow jet intercepting layer is arranged between the fog condensation trapping area and the sprinkling washing area; a smoke outlet is formed in the upper end of the washing tower. According to the efficient wet-type variable flow fog-spraying sprinkling dust-removing purification device, the variable flow jet intercepting layer is additionally arranged in the washing tower so that rotary flow direction jet flow and plug flow transformation are implemented in the smoke flow direction sequentially, fogdrop groups of different fine particle sizes or the fogdrop groups of an absorbent are poured into the fog condensation trapping area to form a high-density fog group fog field taking suspended particles as a core, and the fog group fog field can be efficiently condensed and intercepted by the variable flow jet intercepting layer to improve the classification purification efficiency of particulate matters with the particle size being less than 40 microns so as to improve the total dust-removing purification efficiency of sprinkling the washing tower under the condition of low energy consumption.

The invention relates to a novel rotational flow atomization apparatus and an application technology. The structure characteristics of a core unit, namely a novel rotary sprayer is that the upper part, connected with fluid, of the rotary sprayer is fixed, the lower part of the rotary sprayer is connected with the upper part through one or a plurality of nozzles by virtue of bearings, the lower part of the sprayer is pushed to rotate at high speed by reactive force formed when a part of kinetic energy of the fluid under pressure is ejected from the nozzles, and meanwhile, most of kinetic energy can be effectively converted into surface energy which can facilitate water flow atomization when impacting the bevel or oblique seam of the sprayer or passing through a hole. The novel sprayer has the advantages that the use pressure is low, the rotating speed is rapid, fogdrops are small and uniform, and the fog spraying coverage area is large. The novel rotational flow atomization apparatus can be applied to extinguishment, black smoke can be instantaneously eliminated, fire head is suppressed in seconds, and big fire can be extinguished within ten seconds; when the novel rotational flow atomization apparatus is applied to flue gas purification, rotational flow like tornado can be produced in a tower, and high-efficient desulfurization dust removal is realized; the novel rotational flow atomization apparatus can be widely applied to city purification, park green space watering, landscape decoration, and crop watering, fertilization, pesticide application and industrial mixing, separating, mass transfer and heat transfer processes, and the circumjacent PM 2.5 and other gaseous pollutant can be effectively removed.

The invention discloses a soil remediation method, comprising the following steps: (1) conveying to-be-remedied soil to a vibrating screen via a first-level spiral conveyer, conveying the screened soil to a rotary kiln of a thermal desorption furnace via a second-level spiral conveyer to heat and desorb the soil; (2) conveying the roasted soil to a crusher via a third-level spiral conveyer to crush; (3) decreasing the temperature of waste gas from the rotary kiln of the thermal desorption furnace to 280-320 DEG C through a first water condenser; (4) separating dust particles and liquid mercury from the waste gas passing through the first water condenser in a mercury separator; and (5) burning the waste gas from the mercury separator in a secondary combustor, decreasing the temperature of the waste gas to 150-200 DEG C via a gas condenser and a second water condenser, dedusting the gas via a bag-type dust remover and discharging the dedusted gas through a draught fan. The soil remediation method disclosed by the invention has the advantages that: the soil pollution problem can be well solved; the remedied soil can be directly used; in addition, the remediation process is simple andpracticable, and the cost is low.

The invention provides to a method for innocent treatment of enteromorpha and equipment using the same, which is characterized by comprising the following steps: (1) with pressing dehydrogenation packing equipment, pressing and dehydrating fresh enteromorpha which is just salvaged, packing the fresh enteromorpha to form enteromorpha enclosed mass, and then transporting the mass to a disposal field; (2) sending the mass into a shearer for shearing and shattering, releasing free water in an enteromorpha tubular structure and conducting pressing and dehydrating for the second time; (3) after the second time of pressing and dehydrating, sending the enteromorpha into air dehydration equipment for drying and dehydrating through hot blast, and dehydrating most of the free water and bound water contained in the enteromorpha; (4) conducting bed cleaning and edulcoration through a cyclone dust removal system; and (5) smashing with a pulverizer. The method aims to transportation cost and pollution, and has high treatment efficiency and low energy consumption, thus the edulcoration after treatment can be put into good use. The pressing dehydrogenation packing equipment is driven by hydraulic pressure and the working force is adjustable. The equipment has low noise, is simple to operate, and convenient to feed. The equipment can feed much one time, and feeding compression can be conducted for more than one time.

The invention provides a high-adaptability digging and anchoring integrated machine with a dual-mode anchor drilling system, and belongs to the technical field of underground coal mining equipment. The high-adaptability digging and anchoring integrated machine comprises a frame main body, a cutting system, a conveying system, a dust removing system, a multifunctional temporary supporting system, the dry-wet dual-mode anchor drilling system, an automatic lubricating system, a water-cooling spraying system, a hydraulic system and an electric control system, wherein a traveling mechanism adopts awide crawler design, so that the adaptability of the digging and anchoring integrated machine to a muddy bottom plate is improved; and the dry-wet dual-mode anchor drilling system has two functions of dry dust removal and wet dust removal, and real-time switching selection is carried out according to the geological conditions of the roadway bottom plate without replacing a drill box. By means ofthe high-adaptability digging and anchoring integrated machine, the problems of muddy of the bottom plate, poor stability of a top side wall and low tunneling efficiency in the rapid coal roadway tunneling under the complex geological conditions are solved; the integrated parallel operation of tunneling, anchor protection, transportation, dust removal and the like of a roadway tunneling working surface is realized; and the efficiency and safety of coal mining and transportation are improved.

The invention provides a monitoring and measuring method for dust concentration in working faces in an underground coal mine, and the method overcomes the problems of a slow speed in sampling dust, complicated sampling and incapability of satisfying requirements of safe production on-line monitoring in the prior art. The monitoring and measuring method comprises the following steps: (1) acquiringa rough transmission diagram having a blocking effect based on a degraded image in a working face dust environment; (2) carrying out refined processing on the rough transmission diagram so as to obtain transmissivity corresponding to each pixel point in the diagram; (3) calculating an absorption factor and a scattering factors, calculating an absorption coefficient and a scattering coefficient, and calculating an extinction coefficient; (4) measuring the length of a radiation channel; (5) calculating mass concentration of dust and a changing process of dust concentration based on the transmissivity, the extinction coefficient and radiation length. The beneficial effects of the invention are as follows: rapid measuring is realized; the requirement for real time dynamic measurement is met; the method is of important significance for implementation of corresponding dustproof measures in the underground coal mine. Appropriate dedusting methods can be employed according to different environments when distribution and motion rules of dust in coal mining working faces are mastered.

The invention relates to a process for treating tail gas of a rare earth mineral powder and concentrated sulphuric acid roasting process. The process comprises the following steps of: introducing the tail gas of 300 DEG C of the process into a dust remover for dust removal with a machine; then introducing the tail gas into a condenser for cooling, condensing massive sulphuric acid fog and water vapour in the smoke and recycling acid liquor; introducing the cooled smoke into an acid fog collector, collecting acid fog and water fog in the smoke for recycling; boosting the treated smoke by a fan, introducing the treated smoke into a first absorber, washing by diluted acid liquor or process water to remove residual sulphuric acid fog, hydrofluoric acid and fluosilicic acid from the smoke; andthen introducing the smoke into a second absorber, washing the smoke by an alkali washing tower to remove residual sulphuric acid fog, hydrofluoric acid and SO2 gas from the smoke, and discharging the smoke out after defogging. The process provided by the invention can save massive smoke cooling water, produce less waste water, reduce waste water treatment cost, and recycle the side product fluoric acid produced by solid mineral substances, sulphuric acid, hydrofluoric acid and the like in the tail gas as a raw material for recycling fluorine.

The invention relates to a mobile multi-stage hydraulic-drive pneumatic spray dust-settling truck, mainly solving technical problems of high investment caused by individual use of spray dust-settling devices and poor effect caused by common use of the spray dust-settling devices due to far distance on conditions of multiple and dispersed dust source points, variable dust source locations and complicated conditions of dust sources. The technical scheme includes that a water storage tank is connected with a high-pressure water pump through a water pipe and high-pressure water is pumped to a spraying assembly; a hydraulic station is connected to a hydraulic motor of a mist spraying device through a high-pressure oil pipe to drive an impeller of axle-flow fans to generate high-pressure air flows, the high-pressure air flows send mist to a dust working face, and high-pressure oil of a hydraulic station is connected to a hydraulic cylinder; the mist spraying device is lifted and then is driven to oscillate around a rotating bearing by a motor and a reduction gearbox via a rotational driving gear; a carriage engine drives a power generator through a double-output transmission in a gear shifting manner so that power required for system running is obtained. The mobile multi-stage hydraulic-drive pneumatic spray dust-settling truck is mainly used for far-distance large-range dust settling and removing and firefighting in fugitive emission fields such as tunnel heading, blast mining, loading, crushing and unloading.

The invention relates to a waste tire low-temperature and normal-pressure continuous thermal cracking production device and technology. According to the technical scheme, the device comprises a preprocessing unit, a conveying and feeding unit, a thermal cracking unit, a desulfuration and atomization unit, an oil gas purifying and condensing unit, a carbon black deep processing unit, an oxygen supply air blower and a fuel gas spray gun, wherein the preprocessing unit, the conveying and feeding unit and the thermal cracking unit are connected in sequence, the desulfuration and atomization unit, the oil gas purifying and condensing unit, the carbon black deep processing unit, the oxygen supply air blower and the fuel gas spray gun are connected with the thermal cracking unit, a tail end outlet of the preprocessing unit is connected with the conveying and feeding unit, the thermal cracking unit mainly comprises a furnace body, the furnace body is connected with the oxygen supply air blower and the fuel gas spray gun, and the fuel gas spray gun comprises a natural gas spray gun and a waste gas spray gun. The waste tire low-temperature and normal-pressure continuous thermal cracking production device has the advantages that a full-sealed structure is adopted in the production process, and a strong atomization tower is adopted for performing cooling, dust removal and purification, so that environment pollution is lowered to the minimum; due to the fact that recycled combustible gas and cooling water is recycled, purified and secondarily utilized, energy is saved, the production cost is lowered, and the principle of energy conservation and emission reduction is met.

The invention discloses a high-speed centrifugal drying method, which comprises the following steps of: installing a hot-air drying device, a to-be-dried material conveying device and a tail gas filtering device; when the hot-air drying device works, filtering air to form high-speed airflow; heating the airflow and then jetting the airflow into a drying tower through a pipeline to form high-speed rotary hot airflow; when the to-be-dried material conveying device works, filtering a to-be-dried material and then conveying to a centrifugal atomizer at the top part of a dryer to form atomized liquid drops jetted into a drying room; enabling the atomized liquid drops to be contacted with the high-speed rotary hot airflow, and then, drying to form finished products; delivering the finished product from an outlet at the bottom part of the drying tower; separating tail gas entering the tail gas filtering device through a plurality of cyclone separators in sequence; delivering the finished products mixed in the tail gas from outlets at the bottom parts of the cyclone separators; further filtering the tail gas to remove dust; and then, discharging to the air to finish a high-speed centrifugal drying process. The invention also discloses a drying system.

The invention discloses an efficient wet type electrostatic-precipitation desulfurization system and a process thereof. A wet electrostatic precipitator is used for replacing an existing demister in a desulfurization tower. The wet electrostatic precipitator has more powerful capability and higher efficiency in removal of liquid drops and fine dust in flue gas than the demister, so that the wet electrostatic precipitator achieves high environmental protection discharge requirements, guarantees the desulfurization efficiency, and improves the efficiency of a dust removal system of a desulfurization tower, reduces the discharge concentration of dust at an outlet of the desulfurization tower and achieves the latest discharge standard required by the nation. By means of replacing the demister with the wet electrostatic precipitator, the gypsum rain problem is solved, and joint removal of various pollutants is achieved. Further, a water collection disc is added between a desulfurization absorption area and the wet electrostatic precipitator; as the water collection disc collects flushing water of the wet electrostatic precipitator for recycling, the flushing water of the wet electrostatic precipitator is prevented from entering a neutralization oxidation pond of the desulfurization tower directly, and water balance of the whole system is guaranteed.

The invention discloses a method for preparing yellow phosphorus by low or middle grade phosphorus ore, aiming at solving the technical problem that the prior art consumes much electric power, has high demand on the grade of raw material and exerts great negative effect on the ecological environment. In the invention, a vertical kiln is used as the production equipment; the content of phosphorus pentoxide in phosphorus ore is lower than 25%, 2-10% of mineralizer is added to the raw material. The method comprises the following steps; the materiel, silica, coke are mixed according to the weight proportion of 5.6:3:1, the mixture is ground to powder of 200 meshes and is homogenized; cementing agent is added to the mixture for preparing the mixture into an axiolitic raw material pellet, the pellet is dried; then the pellet is placed in the vertical kiln to be preheated to 1100 DEG C to 1200 DEG C; the pellet enters a reducing phase, and when the temperature is raised to 1240 DEG C to 1270 DEG C, phosphorus steam is led out by an induced draught fan; after dust abatement through gravitational settling, the temperature is reduced by two phases and separation is carried out to obtain the needed yellow phosphorus product; the produced carbon monoxide hot gas is used for drying the pellet and the produced slag is used as cement clinker.

The invention relates to a high concentration phosphoric acid producing method by directly deoxidized phosphorite. The process that the stock produced by phosphorus ore, diatomite, coke or coal accomplishes a reduction-oxidation to produce phosphoric acid consists of a preheating zone, a reducing zone and an oxidation combustion zone which are composed of different equipment modules. The preheating zone is under 1150 DEG C to 1200 DEG C; the reducing zone is under 1250 DEG C to 1450 DEG C, the coke or the coal in the stock performs a reduction reaction with phosphorite; phosphorus vapor that is P4 and carbon monoxide gas which are produced enter into the oxidation combustion zone again; air is added into the oxidation combustion zone, thus the phosphorus vapor that is P4 and the carbon monoxide gas are oxidized to produce a mixed kiln gas which is composed of P2O5 and CO2; the mixed kiln gas with high temperature is sucked out and led into a hydration absorption tower after dust abatement, and the phosphoric acid is produced by recycle acid absorption. The stock after the reduction reaction is exported from the reducing zone, and is formed into cement clinker or building materials after cooling and heat transfer. The invention has the innovative points that the processes of preheating, deoxidizing and oxidizing of reducing gas of the stock are separated, and the reactions are not mutually interfered. The control of the action process is simple, in addition, the percent reduction of the phosphorite is high, and the high yield of total phosphorus can be gained.

The invention discloses a hydrogen-carbon-rich circulating blast furnace and self-developed COREX smelting furnace coupled production process. The hydrogen-carbon-rich circulating blast furnace adopts oxygen-fuel combustion, furnace top gas mainly comprises CO, H2, CO2 and H2O, and a hydrogen-carbon-rich circulating blast furnace and self-developed COREX smelting furnace coupled production system comprises the hydrogen-carbon-rich circulating blast furnace and a self-developed COREX smelting furnace gas making system; furnace top self-developed COREX smelting furnace gas of the self-developed COREX smelting furnace gas making system is subjected to dust removal, pressure reduction and temperature reduction, passes through a CO2 removal device and a CO2 analysis device and then is conveyed to a coal injection system through a pipeline to replace nitrogen to be used as inert gas; part of the CO2-removed reducing gas is self-used and recycled by the self-developed COREX smelting furnace, the other part of the CO2-removed reducing gas is heated to about 900 DEG C by a heating system after being pressurized by a reducing gas pipeline and a compressor, and the CO2-removed reducing gas of the self-developed COREX smelting furnace is blown to the hydrogen-rich carbon circulating blast furnace through a tuyere blowing pipeline and a gas pipeline at the lower part of a furnace body of the hydrogen-rich carbon circulating blast furnace; and the purpose of coupling the hydrogen-rich carbon circulating blast furnace and the self-developed COREX smelting furnace is achieved.

The invention discloses a coating of a device for desulfurization of the flue gas, denitrification, and dust abatement, which is a high performance industrial anti-corrosion coating applicable to harsh conditions like an acid gas environment, etc., and is characterized by excellent permeability for anti-corrosion medium, fine wear resistance, good cohesiveness between a lining and a substrate, and good temperature upheaval-resistance. The coating is applicable to the protection of a chimney inwall provided with a desulfurating device. An approach convenient and easy to be popularized is provided for issues like desulfurization of the flue gas, denitrification, dust abatement and anti-corrosion, etc. The technique has a good effect when being adopted on devices for desulfurization of the flue gas, denitrification, and dust abatement.