32results about How to "Large amount of dust" patented technology

The invention discloses a NOx emission reduction system based on ignition and sintering of a dry mixture. According to the technical scheme, the system comprises a sintering machine; bellows are arranged below trolleys of the sintering machine; the sintering is sequentially divided into four areas including a preheating and drying section, an ignition section, a flue gas quick-heating section and a tail section in the advancing direction of the trolleys; the bellows below the tail section are connected through fluidized bed reactors, a high-temperature flue gas main flue, a high-temperature flue gas dust remover, a high-temperature flue gas circulating fan and a high-temperature flue gas circulating pipe sequentially with a high-temperature circulating flue gas cover located above the preheating and drying section. With the system, the pollution emission amount is small, the recovery rate of waste heat of sintering flue gas is high, no outsourced denitration catalyst is used, and generation of NOx in the flue gas is effectively reduced.

The invention relates to a sectional circulating soot catalytic denitration process for a sintering flue gas. According to the technical scheme, the process comprises the steps as follows: the sintering flue gas passes through a sintered material layer, a backing material, a bottom grate of a trolley of a sintering machine and an air bellow and enters a flue gas pipeline; the sintering machine is sequentially divided into an ignition segment, a machine head segment, a flue gas rapid heating segment and a machine tail segment along the advancing direction of the trolley; the flue gas pipeline comprises a main flue and a circulating flue gas main flue; the sintering flue gas collected by the machine tail segment, the flue gas rapid heating segment and the air bellow at the lower part of the ignition segment enters the main flue; and the sintering flue gas collected by the air bellow at the lower part of the machine head segment of the sintering machine enters the circulating flue gas main flue, is fed into a circulating flue gas hood at the upper part of the trolley at the machine tail segment and the flue gas rapid heating segment of the sintering machine after dust is removed through a circulating flue gas dust collector and then enters a sintered material layer again. The sectional circulating soot catalytic denitration process is simple in technological process; sintering soot autocatalytic denitration is achieved without outsourcing a denitration catalyst; and the sectional circulating soot catalytic denitration process is good in denitration effect, high in waste heat recovery rate, small in floor area, friendly to environment, low in denitration equipment investment and low in denitration operation cost.

The invention relates to a sintering flue gas autocatalysis-based flue gas circulating denitrification system. According to the technical scheme, the system comprises a sintering machine, wherein an air box is arranged at the lower part of a trolley of the sintering machine; an outlet in the bottom of the air box communicates with a flue gas pipe; the sintering machine is sequentially divided into four areas, namely an ignition segment, a machine head segment, a flue gas quick heating segment and a machine tail segment along an advancing direction of the trolley; the outlet of a main flue powder hopper at the lower part of the flue gas pipe connected with the air box in the areas of the machine tail segment and the flue gas quick heating segment is connected with a dust pneumatic conveying pipe; and the outlet of the dust pneumatic conveying pipe is connected to a fluidized bed denitrification reactor through a particle material cabin. The system provided by the invention is simple, high in afterheat recovery rate, small in floor area, friendly to environment, economical in denitrification equipment investment and low in denitrification operation cost, and autocatalytic smoke denitrification is carried out without purchasing a denitrification catalyst.

The invention relates to a sintering flue gas mass-divided directional circulation and on-line denitration system. According to the technical scheme, the sintering flue gas mass-divided directional circulation and on-line denitration system comprises a sintering machine. Air boxes are arranged below trolleys of the sintering machine, and bottom outlets of the air boxes communicate with a gas flue pipeline. The sintering machine is divided into an ignition section, a machine head section, a flue gas fast heating section and a machine tail section in sequence in the advancing direction of the trolleys. The gas flue pipeline comprises a high temperature flue gas main flue, a circulatory flue gas main flue and a machine head ignition section flue. The outlets of the air boxes below the machine tail section and the flue gas fast heating section communicate with the high temperature flue gas main flue through fluidized bed reactors separately, the outlets of the air boxes below the machine head section communicate with a circulatory flue gas cover on the trolleys of the sintering machine through the circulatory flue gas main flue, and the outlets of the air boxes below the ignition section are connected with the machine head ignition section flue. The sintering flue gas mass-divided directional circulation and on-line denitration system is simple, compact in structure, high in waste heat recovery rate and low in denitration operation cost, denitration equipment investment is saved, and zero input of denitration catalysts and flue gas heating energy consumption is achieved.

The invention discloses a reciprocating material feeding type high-concentration dust producer which comprises a launching barrel and an air drafting baffle. The launching barrel and the air drafting baffle are connected with a rack fixedly; a shaft sleeve is arranged above the launching barrel along the radial direction; a dust producing rod is arranged in the shaft sleeve; the diameter of the dust producing rod is smaller than the aperture of the inner hole of the shaft sleeve; a reciprocating motion rod is fixedly connected at the upper end of the dust producing rod; a dust depositing tank is arranged above the shaft sleeve; the upper end of the reciprocating motion rod penetrates through the dust depositing tank; the lower end of the reciprocating motion rod is located in the dust depositing tank; the dust depositing tank is communicated with the launching barrel through the shaft sleeve; a bearing installation base is fixed at the upper end of the reciprocating motion rod; a rolling bearing is arranged in the bearing installation base; the rolling bearing is in rolling contact with an eccentric wheel; the eccentric wheel is connected with a speed change device; the speed change device is connected with a motor; a spring is arranged between the reciprocating motion rod and the shaft sleeve; and the air drafting barrel is provided with an original dust gauge opening under the shaft sleeve. The dust producer is in a manner of reciprocating material feeding with large dust production quantity, high dust production concentration and small dust production error.

The invention discloses a device for collecting trace dust in gas and a method for detecting the particle diameter and the content of particles. The device comprises a dust filter, a three-way valve,a gas volume flow rate meter and an injector, wherein the dust filter is connected with the gas volume flow meter and the injector through the three-way valve. The invention also discloses the methodfor collecting and detecting the particle diameter and the content of particles of the trace dust in the sample gas. The device and the method can be applicable to the conditions that the sample gas quantity is less than 100mL and the dust content is less than 5mg/L, and can also be applicable to the conditions that the gas quantity is greater than or equal to 100mL and the dust content is greaterthan or equal to 5mg/L; the problem that the detection of the trace dust in the gas is limited by the sample quantity and the dust content is solved.

The invention provides large-size efficient air purification equipment for a public place. The large-size efficient air purification equipment comprises an air inlet with a flange, an air outlet, provided with a flange, of a connection short pipe, a shell and a draught fan located in the shell, a particle adsorption device and a pressurizing device, and a base, and further comprises a washing device of the particle adsorption device and an anaerobic acidulation degradation device located at the bottom of the shell, wherein the washing device is located at the top of the shell; one end of the air outlet of the connection short pipe is further connected with an air-liquid separator; the particle adsorption device comprises a cavity; a titanium pipe is arranged inside the cavity; the surface of the titanium pipe is of a honeycomb-shaped titanium dioxide nano structure; the titanium pipe forms a bent loop structure in the cavity; the diameter of the titanium pipe is 3mm-10mm; and the large-size efficient air purification equipment has a good pressure-bearing capability, a strong PM2.5 (Particulate Matter 2.5) adsorption capability, large dust accumulation and long service life, and can also realize degradation washing of the titanium pipe.

The invention discloses a gas filter applicable to a float type pneumatic measuring instrument. The gas filter comprises a gas filter shell, a water guide plate, a flow guide plate, a multifunctional switch, a gas pipe, a gas source input joint, a gas filter shell cover, a gas source output joint, a filtration plate, a bolt, a filter element, an upper hollow bolt, a sliding block, a spring, a lower hollow bolt, a water discharging bolt, a bracket, an anti-explosion plate and a pressure gage. The gas filter is characterized in that the multifunctional switch is arranged; when the multifunctional switch is in one position, gas enters the gas filter through the switch; after the multifunctional switch is rotated by 180 degrees, the gas filter is connected with the atmosphere, the water flows into a water storage chamber from the gas filter; the gas is filtered for three times in the gas filter through crude, middle and high filtration cups of the filter element and the filtration plate; the anti-explosion plate is capable of effectively avoiding the harm to the human body and equipment when accidents happen; and three filters which are connected in series can guarantee the quality of the filtered air.

The invention discloses a mixed extrusion system and mixed extrusion method for production of an A2 or B1-grade fireproof plate. The mixed extrusion system is adopted in the mixed extrusion method. The mixed extrusion system comprises an internal mixer, a main extruder, a feeder and a screw feeder. The feeder is arranged on the upstream portion of the internal mixer. The discharging end of the feeder is connected with a feed opening of the internal mixer to be used for supplying a raw material for producing an A2 or B1-grade fireproof core layer into the internal mixer. A discharging opening is formed in the bottom of the internal mixer and is connected with a feeding opening of the screw feeder. A discharging opening of the screw feeder communicates with a feeding opening of the main extruder. A core layer sheet forming mold used for extruding and forming the fireproof core layer is arranged at the discharging end of the main extruder. By means of the mixed extrusion system, the A2 orB1-grade core layer can be produced better, the production efficiency is improved, process control is simpler, and the core layer is denser.

The invention discloses muck transportation equipment for foundation pit construction. The muck transportation equipment for foundation pit construction comprises a rack, a first conveying roller, a second conveying roller and a rotating roller, wherein the first conveying roller and the second conveying roller are arranged on the rack; the rotating roller is arranged between the first conveying roller and the second conveying roller; and a dust falling device comprises a water supply cavity formed in the rack, a water pump arranged below the water supply cavity, a water supply pipe used for connecting the water pump and the water supply cavity, a water tank arranged below the water pump, and a water pumping pipe used for connecting a water tank and the water pump. According to the muck transportation equipment for foundation pit construction provided by the invention, when water is sent out from a first water outlet and a second water outlet, water is sprayed to muck during transportation, so that the dust falling effect is started, and the situation that the dust content in air is large is prevented; and secondly, due to the fact that in the water spraying process, rolling wheels can make contact with a conveying belt, the muck on the conveying belt fluctuates in operation, gaps exist between the muck, and dust in the muck can be relatively sprayed with water in the water spraying process, so that the dust content in the air is greatly reduced.