CN1480239A - Filtration type gas separation and purification equipment with rapid moving filtering layer - Google Patents
Filtration type gas separation and purification equipment with rapid moving filtering layer Download PDFInfo
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- CN1480239A CN1480239A CNA031531598A CN03153159A CN1480239A CN 1480239 A CN1480239 A CN 1480239A CN A031531598 A CNA031531598 A CN A031531598A CN 03153159 A CN03153159 A CN 03153159A CN 1480239 A CN1480239 A CN 1480239A
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Abstract
A filter-type gas separating-cleaning apparatus with quickly moving filter layer features that its filter cylinder rotating at high speed is composed of external filter net, supporting posts, internal filter net, shaft sleeve, shaft disk and supporting rings, and the gas containing solid particles and/or liquid drops is filtered by said filter cylinder. Its advantage is use of big-mesh filter material to remove fine solid particles and/or liquid drops, resulting in high filter speed, and easy cleaning.
Description
The technical field is as follows:
the invention relates to the technical field of environmental protection and ventilation, in particular to a gas separation and purification device.
Background art:
in the prior art, a filtering gas separation and purification device is the most important device for separating solid-phase particles and/or liquid-phase droplets in gas, and the working principle is as follows: the gas containing solid-phase particles and/or liquid-phase droplets passes through the static filter layer under the drive of the ventilator, and the solid-phase particles and/or liquid-phase droplets are retained on the filter layer, so that the purpose of separating the solid-phase particles and/or liquid-phase droplets in the gas to purify the gas is achieved, according to the principle, the drift diameter of the retained solid-phase particles and/or liquid-phase droplets must be larger than the pore size of the filter layer net, and the filtering efficiency depends on whether the fine solid-phase particles and/or liquid-phase droplets in the gas can be removed, therefore, the filtering material with smaller mesh size (generally, the mesh size is 5-50 μm) must be adopted as the filter layer to remove the fine solid-phase particles and/or liquid-phase droplets, and the high filtering efficiency can be obtained; however, the filter materials with small meshes are made of paper and/or are made of cotton, hemp, wool, artificial fiber and the like, and the mechanical property, the high-temperature resistance and the corrosion resistance of the materials are poor, so that the service life of the filter layer is shortened, and high-temperature and/or high-corrosive gas is difficult to directly treat, so that the application range of the filter layer is limited; secondly, the filtering material with small meshes inevitably causes great air flow passing resistance, in order to reduce the air flow passing resistance, the filtering speed which is as low as 0.008-0.025m/s is generally selected, and when the filtering speed is low, the area of the filtering layer is required to be increased when the same volume of air is treated, so that the volume of the purifying device is large, the consumption of manufacturing materials and the manufacturing cost of the purifying device are increased, and the occupied land and space are increased; moreover, even such a low filtration speed can generate a resistance of 1000Pa or more, increasing the power consumed by the ventilator; in addition, along with the accumulation of solid-phase particles and/or liquid-phase liquid drops on the filter layer in the gas to be treated in the filtration process, the pressure difference between two sides of the filter layer is increased, so that the gas treatment amount is remarkably reduced, and meanwhile, some fine particles trapped on the filter layer are extruded to reduce the purification efficiency; in the currently known air filtration methods, the method of cleaning solid-phase particles and/or liquid-phase droplets accumulated on a filter layer generally adopts manual beating, mechanical beating of the filter layer and/or air flow back blowing and high (low) pressure compressed air pulse back blowing, but these methods are all intermittent cleaning and still make the working condition of the filtration process unstable.
The invention content is as follows:
the invention aims to provide a filtering type gas separation and purification device with a filtering layer moving at a high speed, which has the advantages of high filtering efficiency, high temperature resistance, corrosion resistance and small resistance of the filtering material, can clean solid-phase particles and/or liquid-phase liquid drops accumulated on the filtering layer at any time, ensures that the workingcondition of the filtering process is stable, and has the advantages of small floor area of the purification device and low manufacturing and using cost.
In order to achieve the purpose, the invention adopts the technical scheme that:
a filter-type gas separation and purification device with a filter layer moving at a high speed comprises supporting legs, an ash collecting tank, a gate valve, an ash bucket, an air inlet, a shell, a coarse screen, a motor, a filter cylinder and an air outlet. The ash collecting tank, the gate valve and the ash bucket are arranged between the lower part of the shell and the ground from bottom to top, the air inlet is arranged on the side face of the lower part in the shell, the coarse screen is arranged in the middle of the shell, a filter cartridge consisting of an outer filter screen, a pillar, an inner filter screen, a shaft sleeve, a shaft disc and a top ring is transversely arranged on the upper part in the shell, the pillar and the top ring form a framework of the filter cartridge, the shaft disc forms a filter cartridge chassis, the outer filter screen and the inner filter screen are respectively fixed on the inner and outer cylindrical surfaces of the framework, the shaft disc end of the filter cartridge is sealed, the top ring end of the filter cartridge is open, the shaft disc is a blind plate, the shaft sleeve is arranged at the center of the shaft disc and is sleeved with an output shaft of the motor. The end part of the output shaft of the motor adopts a pressure plate and a set screw to fasten the shaft sleeve and the output shaft of the motor, so that relative axial movement between the shaft sleeve and the output shaft is prevented. The motor is fastened on an end disc through bolts and nuts, and the end disc is installed on the flat flange through screws. The air outlet is a circular air pipe penetrating through the shell, one end of the air outlet is inserted into the open end of the filter cartridge, a labyrinth ring is welded on the outer wall of the circular air pipe, the other end of the air outlet is arranged outside the shell, and a circular flange is arranged to be connected with an external exhaust pipeline.
The instantaneous moving direction of the outer layer filter screen and the inner layer filter screen on the filter cartridge is vertical to the air flow moving direction of the filtered air.
The filter cartridges may be positioned either laterally or longitudinally.
The shape of the filter cylinder can be made into a cylindrical shape or a cone frustum shape.
The outer layer filter screen and the inner layer filter screen are both made of corrosion-resistant and high-temperature-resistant stainless steel.
Compared with the prior gas separation and purification device, the filtering type gas separation and purification device with the filtering layer moving at high speed has the following beneficial effects:
(1) high-efficiency separation realized by adopting filtering material with large-size meshes
The basic principle of the filter type gas separation and purification device with the filter layer moving at high speed provided by the invention is shown in figure 3. Solid particles and/or liquid droplets of particle size d provided in the gas at a velocity v1Vertically passing through an outer layer filter screen with mesh diameter D and width b along with gas for filtering, wherein the particle diameter D of solid-phase particles and/or liquid-phase liquid drops is far smaller than the mesh diameter D of the outer layer filter screen; because the filter cartridge rotates at high speed, the outer layer filter screen (filter layer) is relative to the body of the purification device at a linear velocity v2Moving at high speed, direction of movement and v1Vertically; the time t required for the gas containing solid-phase particles and/or liquid-phase droplets to completely pass through the primary filter screen when passing through the filter layer1＝b/v1(ii) a The time required for the primary filter screen to move one mesh drift diameter is t2＝D/v2(ii) a When t is1＞t2That is v2＞(D/b)v1In time, the skeleton of the primary filter net must be bound to the solid particlesCollision of the object and/or liquid phase droplets; if the moving speed v of the filter screen is initially effective2＞＞(D/b)v1When the gas filter screen is used, solid-phase particles and/or liquid-phase liquid drops just enter the meshes of the filter screen and are collided and/or adhered to the framework of the filter screen, so that the solid-phase particles and/or the liquid-phase liquid drops are effectively prevented from passing through the filter screen, and the aim of efficiently intercepting fine solid-phase particles and/or liquid-phase liquid drops in gas by adopting a large-size mesh filter material is fulfilled.
(2) The filter material is high temperature resistant and corrosion resistant
Because the invention adopts the large-size mesh filter material to realize high-efficiency separation and purification, a filter screen made of high-temperature-resistant and corrosion-resistant stainless steel can be adopted to treat high-temperature gas and high-corrosive gas, so that the application range of the gas separation and purification device is expanded.
(3) Small filtration resistance and high filtration speed
Because the invention adopts the large-size mesh filtering material to realize high-efficiency separation and purification, the air flow passing resistance is reduced, high-filtering-speed filtering is realized, the power consumed by the ventilator is reduced, the volume and the occupied area of the equipment are greatly reduced, and the manufacturing cost and the use cost are effectively reduced.
(4) The working condition of the filtering process is stable, and solid-phase particles and/or liquid-phase liquid drops accumulated on the filtering layer can be cleaned at any time.
The working principle of the purification device is as follows: the gas containing solid-phase particles and/or liquid-phase liquid drops is introduced into the shell from the air inlet under the driving of the ventilator, then the gas sequentially passes through the outer filter screen and the inner filter screen for two-stage filtration, during filtration, because the tangential speed of the primary filter screen and the high-efficiency filter screen is far greater than the speed of the gas containing the solid-phase particles and/or liquid-phase liquid drops passing through the primary filter screen and the high-efficiency filter screen, when the solid-phase particles and/or liquid-phase liquid drops just enter the meshes of the filter screen, the solid-phase particles and/or liquid-phase liquid drops collide with each other and fall back into the shell, even if some solid-phase particles and/or liquid-phase liquid drops with larger viscosity are adhered to the frameworks of the primary filter screen and the high-efficiency filter screen after collision, because the primary filter screen and the high-efficiency filter screen rotate at, the solid-phase particles and/or liquid-phase liquid drops accumulated on the filter layer can be cleaned at any time, the working condition of the filtering process is stable, the solid-phase particles and/or liquid-phase liquid drops which are knocked back or thrown back to the shell are settled at the bottom of the shell, and the solid-phase particles and/or liquid-phase liquid drops can be intensively cleaned when a certain amount of the solid-phase particles and/or liquid-phase liquid drops are accumulated. The filtered gas is clean gas containing trace impurities, and the gas enters the ventilator through the air outlet and is finally discharged through the chimney, so that the purpose of gas purification is achieved.
Drawings
Fig. 1 is a schematic structural diagram of a filter type gas separation and purification device with a filter layer moving at a high speed.
Fig. 2 is an enlarged view of a portion a of fig. 1.
Fig. 3 is an enlarged partial sectional view of B-B of fig. 2.
Fig. 4 is an enlarged view of a portion C of fig. 1.
Fig. 5 is a structural view of an axial flow fan including a filter of a filtration type gas separation purification system in which a filter layer moves at a high speed.
Fig. 6 shows a hybrid heat exchanger of a filter type gas separation and purification system in which a filter layer moves at a high speed.
Fig. 7 is a structural diagram of a filter in a collective vacuum cleaner group using a filter type gas separation purification method in which a filter layer moves at a high speed.
FIG. 8 is a block diagram of a spray-drying desulfurization dust collector employing a gas separation and purification method in which a filter layer moves at a high speed.
In the figure: 1. supporting leg 2, ash collecting tank 3, gate valve 4, ash bucket 5, air inlet 6, shell 7, coarse screen 8, motor 9, filter cylinder 10, air outlet 11, outer filter screen 12, pillar 13, inner filter screen 14, pressure plate 15, set screw 16, flat key 17, shaft sleeve 18, shaft disc 19, flat flange 20, screw 21, end disc 22, bolt 23, nut 24, top ring 25, labyrinth seal 26, blind plate 27, axial fan impeller 28, outer ring 29, axial fan shell 30, axial fan motor 31, motor support 32, water discharge nozzle 33, heat exchanger shell 34, grille 35, mixed flow net 36, centrifugal nozzle 37, water distribution pipe 38, water supply pipe 39, water pump 40, upright post 41, elbow pipe 42 discharge port 43, angle steel support 44, filter shell 45, suction port 46, elbow support 48, removal support 48, multi-pipe outlet 47 elbow support The device comprises a dust collector shell 49, a cyclone 50, a fine dust filter shell 51, a rectifying barrier 52, an airflow type atomizer 53, a compressed air pipe 54, an alkali liquor pipe 55 and a spray drying desulfurizer shell.
Detailed description of the preferred embodiment 1
And average air volume 6000m3/h、4-72-12 No5A 2.The average dust content of the air before treatment is 2g/m3The average particle size was 3.2. mu.m. The treatment temperature is normal temperature. As shown in fig. 1, 2, 3, and 4. The equipment body is welded for 3mm ordinary steel sheet, and equipment basic overall dimension is: the length is 550mm, the width is 550mm, the height is 1850mm, a cylindrical filter cylinder 9 is transversely arranged in the shell 6, and the cylindrical filter cylinder is composed of an outer layer filter screen 11, a pillar 12, an inner layer filter screen 13, a shaft disc 18 and a top ring 24, wherein the pillar 12 and the top ring 24 form a framework of the filter cylinder 9, and the shaft disc 18 is a chassis of the filter cylinder 9. The outer layer filter screen 11 made of a rhombic stainless steel plate net with mesh diameter of 3mm multiplied by 5mm and thickness of 1mm is covered on the outer cylindrical surface of the framework, and the inner layer filter screen 13 made of a rhombic stainless steel plate net with mesh diameter of 2mm multiplied by 4mm and thickness of 1mm is covered on the inner cylindrical surface of the framework, so that two stages of filter layers are formed. The external dimensions of the filter cartridge 9 are: 428mm phi, 520mm long and driven by a motor 8 with the power of 0.75kW and the rotating speed of 16 r/s; the shaft sleeve 17 is arranged at the center of the shaft disc 18 and sleeved with the output shaft of the motor 8, and the shaft sleeve 17 and the output shaft of the motor 8 are connected by a flat key 16 to prevent relative rotation between the two. The end part of the output shaft of the motor 8 adopts a pressure plate 14 and a set screw 15 to fasten the shaft sleeve and the output shaft of the motor 8, so as to prevent relative axial movement between the shaft sleeve and the output shaft. The motor 8 is fastened on an end disc 21 through a bolt 22 and a nut 23, the end disc 21 is installed on a flat plate flange 19 through a screw 20, an air inlet 5 is formed in the side face of the middle lower portion of the shell 6, the coarse screen 7 is welded on the inner wall of the middle portion of the shell 6, an air outlet 10 is a circular air pipe penetrating through the shell 6, one end of the circular air pipe is inserted into an open end of the filter cylinder 9, a labyrinth seal ring 25 is welded on the outer wall of the circular air pipe, a labyrinth seal is formed by a gap between the labyrinth seal ring 25 and a top ring 24, the dust collection tank 2, the gate valve 3 and the dust hopper 4 are arranged between the shell 6 and the ground from bottom to top, and the support. When the filter cartridge works, under the driving of the ventilator, dust-containing gas enters the shell 6 from the air inlet 5, rises to the coarse screen 7 to filter out large-particle-size impurities, continues to rise to the outside of the filter cartridge 9, and then passes through the outer-layer filter screen rotating at high speed11, carrying out high-speed moving filtration of two-stage filter layers by an inner-layer filter screen 13, and discharging filtered clean gas through an air outlet 10; is filteredThe removed dust is settled in the dust hopper 4, and when the dust is accumulated to a certain amount, the gate valve 3 is opened to fall into the dust collection tank 2 to be intensively removed; tests show that the filtering speed is 2.396m/s, the linear velocity of the filter screen is 21.5m/s, and the average dust content at the air outlet 10 is 39mg/m3The dust removal efficiency was 98.1%.
Detailed description of the preferred embodiment 2
Axial flow fan in XGD4F (flow rate 3080-6180 m)3The total pressure is 505-250Pa, the power of the motor 30 of the axial flow fan is 0.75kW, and the rotating speed of the fan is 1450r/min), the axial flow fan with the filter cartridge 9 can be coaxially and simultaneously provided with a power source, and the axial flow fan can replace a fresh air unit which consists of a filter cloth type primary filter, a high-efficiency filter and the axial flow fan at present, as shown in figure 5. The axial flow fan shell 29 is welded by a 2mm common steel plate, and is cylindrical in basic appearance, the diameter of the axial flow fan shell is 448mm, and the length of the axial flow fan shell is 340 mm; the filter cylinder 9 is basically shaped like a truncated cone and comprises a blind plate 26, an outer ring 28, a support column 12, an inner layer filter screen 13 and an outer layer filter screen 11, wherein the diameter of the blind plate 26 is 300mm, the thickness of the blind plate is 3mm, the outer diameter of the outer ring 28 is 440mm, the inner diameter of the outer ring is 400mm, an axial flow fan impeller 27 is welded in the blind plate, the blind plate 26 and the outer ring 28 are connected through the support column 12 to form a framework of the filter cylinder 9, the inside and the outside of the framework are respectively covered with a mesh aperture diameter of 1mm multiplied by 1.5mm, the inner layer filter screen 13 and the mesh aperture diameter of 2mm multiplied by 4mm are made of a diamond-shaped stainless steel plate mesh with the thickness of 1mm, the outer layer filter screen 11 made of the diamond-shaped. The axial flow fan motor 30 is fixed on the motor support 31, and when the axial flow fan motor 30 operates, the axial flow fan impeller 27 and the filter cylinder 9 are driven to rotate together, so that the inner filter screen 13 and the outer filter screen 11 perform separation and purification of high-speed movement of the filter layer on gas before purification. Tests show that when the average filtering speed is 3.94m/s and the average linear speed of the filter screen is 22.8m/s, the purification efficiency of the filter screen on solid-phase particles with the particle size of below 2 mu m is 86 percent, and the purification efficiency of the filter screen on solid-phase particles with the particle size of above 2 mu m is 98.6 percent.
Detailed description of preferred embodiments 3
The mixed heat exchanger is used for exchanging heat between cold and hot fluid water and air, and the amount of heat exchange gas processed in unit time is 10800m3/h，The amount of heat exchange water treated in unit time is 8m3The thermal parameters of the air before heat exchange are as follows: the dry bulb temperature is 28 ℃, the wet bulb temperature is 22.5 ℃, and the thermal parameters of water before heat exchange are 14 ℃. As shown in fig. 6. The equipment body is welded for 3mm ordinary steel sheet, and equipment basic overall dimension is: long 1050mm, wide 550mm, height 1100mm, heat exchanger shell 33 adopts the ordinary cold-rolled steel sheet welding of 3mm, the spraying plastics processing is carried out to interior external surface, heat exchanger shell 33 embeds 450X 550mm, thickness moulds the mixed flow net 35 of silk system for 180mm, mixed flow net 35 adopts barrier 34 fixed, set up 16 centrifugal nozzle 36 in mixed flow net 35 right side, centrifugal nozzle 36 installs on liquid distribution pipe 37, and through water pump 39, the cold water before liquid supply pipe 38 and the liquid distribution pipe 37 supply heat transfer, water discharging nozzle 32 sets up in heat exchanger shell 33 bottom, horizontal cartridge filter 9 is located heat exchanger shell 33 upper portion one side, cartridge filter 9's overall dimension does: 428mm phi, 520mm long and driven by a motor 8 with the power of 0.75kW and the rotating speed of 16 r/s; the outer layer filter screen 11 is made of a rhombic stainless steel plate net with the drift diameter of 5mm multiplied by 8mm and the thickness of 1mm, and the inner layer filter screen 13 is made of a rhombic stainless steel plate net with the drift diameter of 2mm multiplied by 4mm and the thickness of 1 mm. During operation, the external ventilator is drivenNext, air before heat exchange enters the heat exchanger shell 33 from the air inlet 5, water before heat exchange enters the centrifugal spray head 36 through the liquid supply pipe 38 and the liquid distribution pipe 37 under the drive of the water pump 39, the air before heat exchange meets, mixes and exchanges heat with atomized water sprayed by the centrifugal spray head 36 in a spraying area, mixed fluid of the water and the air after heat exchange passes through the mixing flow net 35 and then is subjected to two-stage forced separation through the filter cartridge 9, and the separated water is thrown back to the inner cavity of the heat exchanger shell 33, freely falls to the bottom of the heat exchanger shell 33 and then is discharged through the water discharge nozzle 32; the air after forced separation passes through the outer layer filter screen 11 and the inner layer filter screen 13 and then is discharged through the air outlet 10. The thermal parameters of the air after heat exchange are as follows: the dry bulb temperature is 17.6 ℃, the wet bulb temperature is 17.6 ℃, and the thermal parameter of the water after heat exchange is 17.7 ℃.
Detailed description of preferred embodiments 4
The filter in the centralized dust collection unit matched with the Roots vacuum pump with the power of 7.5kW, the flow rate of 7m3/min and the vacuum degree of 35000Pa can replace a bag type dust collector in the conventional unit, as shown in FIG. 7; the equipment body is 6mm ordinary steel sheet system of welding, and the basic appearance of equipment is cylindrical, and overall dimension is phi 850mm, and height 2550mm, filter housing 44 pass through stand 40 to be fixed subaerial, and collection ash jar 2, push-pull valve 3 and ash bucket 4 set up between filter housing 44 and ground from bottom to top, and filter housing 44 internal top sets up the cartridge filter 9 of putting vertically, and the overall dimension of cartridge filter 9 is: phi P340mm, 380mm high, driven by a motor 8 with power of 0.75kW and rotation speed of 16 r/s; the outer layer filter screen 11 is made of a rhombic stainless steel plate net with the drift diameter of 2mm multiplied by 4mm and the thickness of 1mm, and the inner layer filter screen 13 is made of a rhombic stainless steel plate net with the drift diameter of 1mm multiplied by 1.5mm and the thickness of 1 mm. The elbow pipe 41 is welded on the inner wall of the filter shell 44 through an angle iron bracket, one end of the elbow pipe is inserted into the filter cylinder 9, the other end of the elbow pipe penetrates through the wall plate of the filter cylinder 9 and is welded with the discharge port 42, the discharge port 42 is connected with the inlet of the roots type vacuum pump through a pipeline, and the suction port 45 is welded on one side of the filter shell 44. The suction port 45 is connected to the cleaning implement through a pipe. When the gas purifier works, the Roots vacuum pump and the motor 8 are started, the dust-containing gas enters the filter shell 44 through the suction port 45 under the driving of the Roots vacuum pump, and after the dust-containing gas passes through the filter cartridge rotating at a high speed for two-stage filtration, the filtered clean gas is sucked into the Roots vacuum pump through the exhaust port 42 and then is exhausted; solid-phase particles in the dust-containing gas are settled in the ash hopper 4, and when the solid-phase particles are accumulated to a certain amount, the gate valve 3 is opened, and the solid-phase particles fall into the ash collection tank 2 to be intensively removed; tests show that when the filtering speed is 0.28m/s and the linear speed of the filter screen is 17.2m/s, the purification efficiency of the filter screen on solid-phase particles and/or liquid-phase droplets with the particle size of less than 1 mu m is 93 percent, and the struggling efficiency of the filter screen on solid-phase particles and/or liquid-phase droplets with the particle size of more than 1 mu m is 99.5 percent.
Best mode for carrying out the invention
A spray drying and separating dust remover matched with a coal-fired boiler with the power of 2.8MW (4 tons/hour), as shown in figure 8, the equipment is divided into three basic parts which are connected in series, the right side is a spray drying desulfurizer, the middle part is a multi-pipe cyclone dust remover, and the left side is a fine dust filter with a filter layer moving at a high speed; wherein spray drying desulfurizer casing 55, the fine filter casing 50 that multitube cyclone casing 48 and filter layer high speed moved is that the wall thickness welds for 5mm ordinary steel sheet and forms and welds the dress and form whole equipment together, whole equipment four corners outer wall welds dress landing leg 1, spray drying desulfurizer casing 55 lower part, multitube cyclone casing 48 lower part andfine filter casing 50 lower part all top-down set up ash bucket 4, push-pull valve 3 and dust collection tank 2, whole equipment basic appearance is the cuboid, basic overall dimension is: the length is 3100mm, the width is 1400mm, the height is 3500mm, the air inlet 5 is arranged on the side wall of the spray drying desulfurizer shell 55, the rectifying barrier 51 is arranged above the air inlet 5 in the spray drying desulfurizer shell 55, the upper part of the rectifying barrier 51 is provided with an airflow atomizer 52, a compressed air pipe 53 and an alkali liquor pipe 54 are arranged on the airflow atomizer 52, and the compressed air and the sodium hydroxide aqueous solution are supplied to the airflow atomizer 52. 24 cyclones 49 are provided in the multi-cyclone case 48 to form a multi-cyclone; the top sets up the cartridge filter 9 of putting vertically in fine filter dust ware casing 50, and the overall dimension of cartridge filter 9 is: phi 428mm, height 550mm and driven by a motor 8 with power of 1.1kW and rotation speed of 24.2 r/s; the outer layer filter screen 11 is made of a rhombic stainless steel plate net with the drift diameter of 2mm multiplied by 4mm and the thickness of 1mm, and the inner layer filter screen 13 is made of a rhombic stainless steel plate net with the drift diameter of 1mm multiplied by 1.5mm and the thickness of 1 mm. The elbow outlet 46 is a circular elbow air duct passing through the fine filter housing 50, supported by an elbow support 47 in the fine filter housing 50, and having one end inserted into the open end of the filter cartridge 9. When the device works, under the driving of the ventilator, the flue gas of the coal-fired boiler enters the spray drying desulfurizer shell 55 from the air inlet 5, meets and mixes with the fog-like sodium hydroxide water solution sprayed by the airflow type atomizer 52 after being rectified by the rectifying barrier 51, and the sodium hydroxide and water in the fog-like sodium hydroxide water solution and the sulfur dioxide in the flue gas of the boiler are subjected to the following chemical reactions:
the reaction product is fine liquid drops of sodium sulfite aqueous solution and fine liquid drops of sodium sulfate aqueous solution, when the reaction product continuously rises, under the action of high-temperature boiler flue gas, water is evaporated to form solid-phase sodium sulfite particles and solid-phase sodium sulfate particles, the solid-phase sodium sulfite particles and the solid-phase sodium sulfate particles are mixed with the boiler flue gas and enter a multi-cyclone dust collector, dust-containing flue gas is roughly separated through 24 cyclones 49 in the multi-cyclone dust collector, the gas after rough separation enters a fine dust collector shell 50 from core pipes of the cyclones 49, then fine filtration is carried out through an outer-layer filter screen 11 and an inner-layer filter screen 13 which rotate at high speed on a filter cartridge 9, and the filtered clean gas is discharged through an; solid-phase particles separated by the spray drying desulfurizer, the multi-pipe cyclone dust collector and the fine dust collector are settled into respective dust hoppers 4, and when a certain amount of the solid-phase particles are accumulated, the respective gate valves 3 are opened to fall into respective dust collection tanks 2 to be intensively removed. Tests show that when the filtering speed is 28m/s and the minimum linear speed of the filter screen is 32.5m/s, the purification efficiency of the filter screen on solid-phase particles with the particle size below 1 mu m is 87 percent,and the purification efficiency of the filter screen on solid-phase particles with the particle size above 1 mu m is 98.3 percent; when coal having an average sulfur content of 1.1% was burned, 85 liters/hr of an aqueous solution of sodium hydroxide having a pH of 13 was injected per hour, and the desulfurization efficiency was 91%.
Claims (6)
1. The utility model provides a high-speed gaseous separation and purification device of filtration formula that removes of filter layer, includes landing leg (1), collection ash jar (2), push-pull valve (3), ash bucket (4), air intake (5), casing (6), coarse screen (7), motor (8), cartridge filter (9), air outlet (10), its characterized in that: the ash collecting tank (2), the gate valve (3) and the ash bucket (4) are arranged between the lower part of the shell (6) and the ground from bottom to top, the air inlet (5) is arranged on the side surface of the middle lower part of the shell (6), the coarse screen (7) is arranged in the middle of the shell (6), one side of the upper part of the shell (6) is transversely provided with a framework consisting of an outer filter screen (11), a pillar (12), an inner filter screen (13), a shaft sleeve (17), a shaft disc (18) and a top ring (24), the pillar (12) and the top ring (24) form the filter cartridge (9), the shaft disc (18) forms a chassis of the filter cartridge (9), the outer filter screen (11) and the inner filter screen (13) are respectively welded on the inner and outer cylindrical surfaces of the framework, the filter cartridge (9) is closed at the end of the shaft disc (18), the end of the top ring (24) is open, the shaft disc (18) is a blind plate, and the shaft sleeve (17) is arranged at the central position, the air outlet (10) is a circular air pipe penetrating through the shell (6), one end of the circular air pipe is inserted into the open end of the filter cartridge (9), alabyrinth ring (25) is welded on the outer wall of the circular air pipe, the other end of the circular air pipe is arranged outside the shell, and is provided with a circular flange and connected with an external exhaust pipeline.
2. The filter-type gas separation and purification device with a high-speed moving filter layer according to claim 1, wherein: the instantaneous moving direction of the outer layer filter screen (11) and the inner layer filter screen (13) is vertical to the moving direction of the airflow of the separated purified gas.
3. The filter-type gas separation and purification device with a high-speed moving filter layer according to claim 1, wherein: the filter cartridges (9) can be placed either transversely or longitudinally.
4. The filter-type gas separation and purification device with a high-speed moving filter layer according to claim 1, wherein: the filtering mode adopts external filtering type filtering (the separated purified gas flows from the outside of the filter cartridge (9) to the inner cavity of the filter cartridge (9) through the filter layer).
5. The filter-type gas separation and purification device with a high-speed moving filter layer according to claim 1, wherein: the shape of the filter cylinder (9) can be made into a cylindrical shape or a cone frustum shape.
6. The filter-type gas separation and purification device with a high-speed moving filter layer according to claim 1, wherein: the outer layer filter screen (11) and the inner layer filter screen (13) are both made of corrosion-resistant and high-temperature-resistant stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03153159 CN1218768C (en) | 2003-08-08 | 2003-08-08 | Filtration type gas separation and purification equipment with rapid moving filtering layer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03153159 CN1218768C (en) | 2003-08-08 | 2003-08-08 | Filtration type gas separation and purification equipment with rapid moving filtering layer |
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| CN1480239A true CN1480239A (en) | 2004-03-10 |
| CN1218768C CN1218768C (en) | 2005-09-14 |
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| CN 03153159 Expired - Fee Related CN1218768C (en) | 2003-08-08 | 2003-08-08 | Filtration type gas separation and purification equipment with rapid moving filtering layer |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006045138A2 (en) * | 2004-10-29 | 2006-05-04 | Johnson Leslie Vincent P | Dust extractor |
| CN100446837C (en) * | 2007-01-31 | 2008-12-31 | 宁波大学 | Granular-layer dust precipitator |
| CN102327717A (en) * | 2011-09-27 | 2012-01-25 | 江苏鹏飞集团股份有限公司 | Rotary type granular layer dust removal device for high-temperature oil gas |
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