Method of dust removal for coke transportation system
Technical Field The present invention relates to iron-making enterprises chark of dust collection method of the conveying system, which belongs to the technical field of environmental protection of dry dust removal. Background Art My conveying coke dust-removal system for the conveying process, the majority of the negative pressure induced dust bag dust-removing process. Bag dust-removing process includes dust trapping cover, conveying pipeline, baghouse, such as an induced draft fan and the chimney. Advantages: the dust removal efficiency is high. Shortcoming: large investment; dust collecting rate is low; a horizontal pipeline is easy to be blocked, the trapping rate of impact; convulsions amount is large, the operation cost is high; dust collector, such as an induced draft fan and the chimney of large occupied area; full-time need to set up the operation of the dust transport equipment and maintenance personnel. Content of the invention The invention the technical problem to be solved is to provide a method for removing dust on the transport system chark, less investment, not occupying area, high absorptivity, the processing cost is low, dust remover long service life, short construction period. To solve the technical problem of the present invention adopts a technical proposal that: the material passes through a conveying device for sealing, of the conveyer are arranged sequentially in the blanking station after dust chamber, ignition and gas separation chamber and circulation; for raises the dust to be mad of the dust of the inclined deflector plate to generate turbulent flow, sedimentation large particle, the fine dust to produce negative pressure in the feed opening, the reflow to the lower end of the drop pipe; in the dust separation chamber the inclined deflector plate at the front end of the dust-containing gas stream to continue to change movement direction and movement speed, so that the dust and the airflow separation; the ignition in the cycle of the inclined deflecting plate and hang down the rubber strip further reduce the dust to kinetic energy, and the static electricity in the rubber strip, sedimentation of the remaining dust. The invention relates to a transport system of chark of the dust-removing method also comprises the following technical scheme: In the dust chamber, ignition and gas separation chamber and arranged on the upper part of the inclined deflector plate and the horizontal direction is included angle of 15-45 ° ; dust using the negative pressure of the feed opening of the movement of the conveyor belt and the material generated locally the feeding opening; of the circulating circuit is supplied in the chamber, hang down the rubber of the rear end of the chamber. The use of dust-free coke transport system, is provided with the dust collecting chamber a gas guide tube of the negative pressure, the collected dust guide this invention the another chark in the transport system. The processing procedure of the present invention the specific technical parameter is: (1) the sealing treatment of the conveying device, the dirt spots dust concentration ≤ 5g/m3, equipment should be in a normal-temperature, normal-pressure state, a steel weldment sealing the box body, and apparatus for the sealing between the rubber plate, the belt conveyer, the head, the tail part of the sealing rubber, rubber strip diameter is φ 8-10mm, 4-6 a layer arrangement, clearance is 0.5-1.0 mm; (2) in the dust removing treatment, the space above the belt conveyer should be in the 1500 mm or more, the cross-sectional area of the chamber type dust collector the sectional area of the drop pipe 8-12 times, the speed of the air flow in the dust remover 0.6-1.0m/s, dust and gas cross-sectional area of the return line of the sectional area of the drop pipe is 0.5-0.8 times, the speed of the air and the backflow pipe> 3.5m/s; (3) the separation and dust in the dust removing processing dust circulation, the speed of the air is less than or equal to the running speed of the belt; (4) the dust-free of coke dust in the transport system in the guide out processing sets at the dust , the two transport systems of the type of the conveyor belt and the distance between the conveying belt cheng Jiao less than 10 m. The use of equipment of the present invention meet the following parameters: the size of the bin opening of the coke is 8000 mm × 8000 mm within; groove-shaped conveying belt, width = 500-1400mm, the tape speed = 0.8-3.15m/s, the treatment capacity of 2528t/h the following, the drop material 10m within; vibrating screen sieve size is 1800 × 3600 mm within, the treatment capacity of 440t/h the following; jaw crusher equipment specification is 1500 × 2100 mm within, the treatment capacity of 790t/h the following; φ 2200 mm conical crusher equipment specification is within, the treatment capacity of 230t/h the following. The beneficial effect of the invention is: (1) draw no pipeline factory building and the like, there is no dust collector, a blower, a chimney, equipment, not occupied, no visual pollution. (2) do not need to allocate workers operation, convenient maintenance, low cost. (3) non-power dust removing process, no power consumption. (4) micro-power dust-removing process, the power consumption is low, approximately budai of 20%. (5) the investment is saved about 20-30%. (6) the dust catching that 90% or more, dust content of the flue gas outlet of the chimney <50 mg/Nm3, the dust concentration of the operating point of the <10 mg/m3. Description of drawings Figure 1 is a schematic diagram of the dust removal device for conveying system chark of this invention, Figure 2 is a schematic diagram of the dust removal device of the type conveying cheng Jiao of the present invention. Mark sequentially in the Figure that the: belt conveyor 1, the conveyer belt type 1-1, conveyer belt cheng Jiao 1-2, sealing chamber 2, drop pipe 3, the return line 4, dust removal chamber 5, the negative pressure pulse filter 6, the deflector plate 7, dust separating chamber 8, ignition cycle 9, connector 10, the rubber strip 11, a gas guide tube 12. Mode of execution Embodiment See Figure 1, 2, the belt conveyor 1 is the first of the sealing chamber 2 for sealing, blanking pipe 3 are arranged sequentially in the work station after the dust chamber 5, dust separating chamber 8 and the circulation circuit 9, the upper part of the chamber are all provided with an inclined deflector plate 7, and the deflector plate 7 and the horizontal direction is included angle of 15 °-45 °, through the communicating vessels between each chamber 10 as a whole. First of all in the drop pipe 3 into the dust chamber 5 rise of the dust was mad , by the slope of the upper deflection plate 7 to the changing, producing a turbulent flow, make the large particle sedimentation; and fine the belt conveyer at the feeding opening 1 and the movement of the materials, produce micro-negative pressure, through the return of the fine dust 4 reflux to falling pipe 3 at the lower end of the, final most of the dust in the dust chamber 5 is settled to the material in. A large part of the momentum of the dust with the belt conveyor 1 and the material to continue to the movement of the dust separating chamber 8 diffusion, the dust separating chamber 8 in the inclined deflector plate on 7 blocking, direction changing, the movement of the dust-containing air flow is changed and the movement speed in the direction, but also the part of the dust and the airflow separation. There is still a very small amount of dust to continue to circulate the sequence 9 movement, again by ignition and the cycle 9 of the inclined deflector plate on 7 barrier, variable to the, at the same time, circulating circuit 9 that depends beneath the rear part of a series of the rubber strip 11 once again prevent dust, and the dust particles generated by the friction and collision of electrostatic, the final settling of the remaining dust. In the actual implementation, some equipment dust collected can be accepted, some equipment cannot accept the dust. As shown in Figure 2, the use of coke dust-free transport system, the dust collecting chamber 5 a gas guide tube of the negative pressure is set at 12, will trap the dust guiding this invention the another chark in the transport system, the conveyer belt type 1-1 chark in the transport system dust removing device, provided with negative pressure pulse filter 6, the conveyer belt cheng Jiao 1-2 collected in the dust-removing device for the dust, guided through the negative pressure in suction mode. The embodiment of the invention the processing procedure for the specific technical parameters: (1) the sealing treatment of the conveying device, the dirt spots dust concentration ≤ 5g/m3, equipment should be in a normal-temperature, normal-pressure state, a steel weldment sealing the box body, and apparatus for the sealing between the rubber plate, the belt conveyer, the head, the tail part of the sealing rubber, rubber strip diameter is φ 8-10mm, 4-6 a layer arrangement, clearance is 0.5-1.0 mm; (2) in the dust removing treatment, the space above the belt conveyer should be in the 1500 mm or more, the cross-sectional area of the chamber type dust collector the sectional area of the drop pipe 8-12 times, the speed of the air flow in the dust remover 0.6-1.0m/s, dust and gas cross-sectional area of the return line of the sectional area of the drop pipe is 0.5-0.8 times, the speed of the air and the backflow pipe> 3.5m/s; (3) the separation and dust in the dust removing processing dust circulation, the speed of the air is less than or equal to the running speed of the belt; (4) the dust-free of coke dust in the transport system in the guide out processing sets at the dust , the two transport systems of the type of the conveyor belt and the distance between the conveying belt cheng Jiao less than 10 m. The use of equipment of the present invention meet the following parameters: the size of the bin opening of the coke is 8000 mm × 8000 mm within; groove-shaped conveying belt, width = 500-1400mm, the tape speed = 0.8-3.15m/s, the treatment capacity of 2528t/h the following, the drop material 10m within; vibrating screen sieve size is 1800 × 3600 mm within, the treatment capacity of 440t/h the following; jaw crusher equipment specification is 1500 × 2100 mm within, the treatment capacity of 790t/h the following; φ 2200 mm conical crusher equipment specification is within, the treatment capacity of 230t/h the following. Embodiment applied to the group iron kunming iron and steel Corporation, six iron blast furnace to remove jiao Cao , includes a belt transfer station, mobile cart, the storage bin, such as the vibrating screen dust removal point. The total investment 550 million, the construction period is 120 days, for 2008 years 4 months jiancheng production, notably dust removing effect, dust content of the flue gas outlet of the chimney <50 mg/Nm3, lower than the National emission standards; the dust concentration of the operating point of the <10 mg/m3, accord with the National occupational health standards. And the cloth bag dust removal art, the total investment saving 150 million, short construction period 60 days, annual saving of operating electricity 130 million. The invention relates to a method of dust removal for a coke transportation system, belonging to the technical field of environment-friendly dry dust removal. The method of the invention comprises the following steps: sealing a conveying device for materials to pass through, and sequentially arranging a dust-removal chamber, a dust-gas separating chamber and a cyclic dust-settling chamber after the blanking station of a conveyor; generating turbulent flow to the uplifting dust-containing gas in the dust-removal chamber by an overhead tilted deflecting plate, so that large particles can be settled, and generating negative pressure to fine dust therein at the blanking opening, so that the fine dust can flow back to the lower end in a blanking tube; continuing to change the movement direction and movement velocity of the dust-containing gas flow by an overhead tilted deflecting plate in the dust-gas separating chamber, so that the fine dust can be separated from the gas flow; further reducing the kinetic energy of the dust by the overhead tilted deflecting plate and vertically suspended rubber strips in the cyclic dust-settling chamber, and generating static electricity on the rubber strips so that the remaining dust can be settled. The method of the invention has the advantages of small investment, no area coverage, high dust arrestment rate, low processing cost, long service life of dust removers and short construction period; and the outlet gas of the dust removers is lower than the national emission standards. 1, a coke dust removal method on the transport system, characterized in that the material passes through a conveying device for sealing, of the conveyer are arranged sequentially in the blanking station after dust chamber, ignition and gas separation chamber and circulation; for raises the dust to be mad of the dust of the inclined deflector plate to generate turbulent flow, sedimentation large particle, the fine dust to produce negative pressure in the feed opening, the reflow to the lower end of the drop pipe; in the dust separation chamber the inclined deflector plate at the front end of the dust-containing gas stream to continue to change movement direction and movement speed, so that the dust and the airflow separation; the ignition in the cycle of the inclined deflecting plate and hang down the rubber strip further reduce the kinetic energy of the dust, and the static electricity in the rubber strip, sedimentation of the remaining dust. 2, coke dust removal method on the transport system according to Claim 1, characterized in that the dust collecting chamber, and ignition and gas separation chamber and the inclined deflector plate and the horizontal direction is 15-45 ° included angle; dust using the negative pressure of the feed opening of the movement of the conveyor belt and the material generated locally the feeding opening; of the circulating circuit is supplied in the chamber, hang down the rubber of the rear end of the chamber. 3, coke dust removal method on the transport system according to Claim 1, characterized in that the use of coke dust-free transport system, is provided with the dust collecting chamber a gas guide tube of the negative pressure, the trapping the dust directed into the other of the transport system of the invention in the coke. 4, coke dust collection method as in Claim 2 or Claim 3 transport system, characterized in that (1) the sealing treatment of the conveying device, the dirt spots dust concentration ≤ 5g/m3, equipment should be in a normal-temperature, normal-pressure state, a steel weldment sealing the box body, and apparatus for the sealing between the rubber plate, the belt conveyer, the head, the tail part of the sealing rubber, rubber strip diameter is φ 8-10mm, 4-6 a layer arrangement, clearance is 0.5-1.0 mm; (2) in the dust removing treatment, the space above the belt conveyer should be in the 1500 mm or more, the cross-sectional area of the chamber type dust collector the sectional area of the drop pipe 8-12 times, the speed of the air flow in the dust remover 0.6-1.0m/s, dust and gas cross-sectional area of the return line of the sectional area of the drop pipe is 0.5-0.8 times, the speed of the air and the backflow pipe> 3.5m/s; (3) the separation and dust in the dust removing processing dust circulation, the speed of the air is less than or equal to the running speed of the belt; (4) the dust-free of coke dust in the transport system in the guide out processing sets at the dust , the two transport systems of the type of the conveyor belt and the distance between the conveying belt cheng Jiao less than 10 m. 5, according to claim 2 or 3 wherein the coke dust removal method on the transport system, characterized in that the equipment used to meet the following parameters: the size of the bin opening of the coke is 8000 mm × 8000 mm within; groove-shaped conveying belt, width = 500-1400mm, the tape speed = 0.8-3.15m/s, the treatment capacity of 2528t/h the following, the drop material 10m within; vibrating screen sieve size is 1800 × 3600 mm within, the treatment capacity of 440t/h the following; jaw crusher equipment specification is 1500 × 2100 mm within, the treatment capacity of 790t/h the following; φ 2200 mm conical crusher equipment specification is within, the treatment capacity of 230t/h the following.