A flue gas low-temperature dry desulfurization and denitrification treatment system

Abstract

The present invention belongs to the technical field of flue gas treatment, and discloses a low-temperature dry desulfurization and denitrification treatment system for flue gas, including an SDS desulfurization reactor, a feeder, an ammonia water tank, an SCR denitrification reactor and a dust removal tank; an exhaust chamber is provided on the upper part of the dust removal tank, a dust removal bag is vertically fixedly installed on the top surface of the inner cavity of the dust removal tank, a cleaning mechanism is arranged in the inner cavity of the dust removal bag, and a high-pressure pump is fixedly installed on the top surface of the dust removal tank. The present invention can gradually clean the dust removal bag in different areas through the coordinated design of the high-pressure pump, the dust removal bag and the cleaning mechanism, and the cleaning uniformity is good. At the same time, the vibration effect is generated to improve the effect of cleaning the dust attached to the outer surface of the dust removal bag, and the back-blowing cleaning effect on the side of the dust removal bag far from the high-pressure air entrance is poor, and the back-blowing cleaning effect on the side close to the high-pressure air entrance is good, which reduces the uniformity of cleaning the dust attached to the outer surface of the dust removal bag and reduces the problem of cleaning effect.

Description

Technical Field

[0001] The invention belongs to the technical field of flue gas treatment, and in particular is a flue gas low-temperature dry desulfurization and denitrification treatment system. Background Art

[0002] Flue gas desulfurization and denitrification technology is a boiler flue gas treatment technology used in the chemical industry that produces a lot of nitrogen oxides and sulfur oxides. Nitrogen oxides and sulfur oxides are one of the main sources of air pollution, and the flue gas needs to be treated through a desulfurization and denitrification treatment system during the flue gas emission process.

[0003] The desulfurization and denitrification treatment system is usually composed of an SCR denitrification reactor, an SDS desulfurization reactor, a bag filter, an ammonia tank, etc., among which the bag filter is mainly used to filter the smoke in the flue gas.

[0004] When the bag dust collector in the prior art is in use, smoke enters the dust collector, and the outer surface of the dust collector bag can filter the dust in the smoke. After the smoke penetrates into the dust collector bag, it is discharged from the opening of the dust collector bag through a connecting pipe. In order to maintain the filtering effect of the dust collector bag, high-pressure air is usually intermittently sprayed into the dust collector bag to back-blow the dust attached to its outer surface, thereby cleaning the dust on the outer surface of the dust collector bag. However, the back-blow cleaning effect is poor on the side of the dust collector bag far from the high-pressure air entrance, while the back-blow cleaning effect is good on the side close to the high-pressure air entrance, which reduces the uniformity of cleaning the dust attached to the outer surface of the dust collector bag and reduces the cleaning effect. Summary of the invention

[0005] Technical issues solved

[0006] In order to solve the problems raised in the above-mentioned background technology, the present invention provides a flue gas low-temperature dry desulfurization and denitrification treatment system, which has the advantages of convenient operation, gradual cleaning in different areas, good cleaning uniformity and good cleaning effect. Through the coordinated design of structures such as high-pressure pumps, dust bags, and cleaning mechanisms, the dust bags can be gradually cleaned in different areas with good cleaning uniformity, and can produce a vibration effect to enhance the effect of cleaning dust attached to the outer surface of the dust bags.

[0007] Technical Solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flue gas low-temperature dry desulfurization and denitrification treatment system, comprising an SDS desulfurization reactor, a feeder, an ammonia water tank, an SCR denitrification reactor and a dust removal tank; an exhaust chamber is provided on the upper part of the dust removal tank, a dust removal bag is vertically fixedly installed on the top surface of the inner cavity of the dust removal tank, a cleaning mechanism is provided in the inner cavity of the dust removal bag, and a high-pressure pump is fixedly installed on the top surface of the dust removal tank;

[0009] The cleaning mechanism includes a fixing frame fixedly sleeved on the bottom of the outer surface of the dust bag, a mounting column vertically arranged in the inner cavity of the dust bag, an annular mounting block moving up and down on the outer surface of the mounting column, two annular partition plates symmetrically fixedly installed on the upper and lower sides of the annular mounting block, a group of air outlet channels equidistantly arranged on the upper part of the outer ring of the annular mounting block in the circumferential direction, a connecting mechanism for conveying high-pressure air arranged in the lower part of the inner ring of the annular mounting block and the inner cavity of the mounting column, two eccentric rollers symmetrically arranged on the left and right sides between the two annular partition plates, a transmission mechanism arranged on the outer ring of the annular mounting block for driving the eccentric roller to move circumferentially, a linkage mechanism arranged on the opposite surfaces of the two annular partition plates for driving the eccentric roller to rotate, and a detection mechanism arranged on the two eccentric rollers;

[0010] Wherein, the fixing frame is fixedly connected to the inner cavity of the dust removal tank, and a hydraulic rod is vertically fixedly installed at the center of the bottom surface of the fixing frame. When the hydraulic rod is in operation, the annular mounting block is driven to move up and down through the connecting mechanism, and the outer ring of the annular partition plate is movably connected to the inner cavity wall of the dust removal bag, and the outer surface of the eccentric roller is movably connected to the inner cavity wall of the dust removal bag, and the high-pressure pump can deliver high-pressure air to the inner cavity of the mounting column, and the outer rings of the two annular partition plates are fitted with the inner ring walls of the dust removal bag to form an annular sealed space, and when the high-pressure air back-blows and cleans the inner cavity of the dust removal bag between the two annular partition plates, the high-pressure air will fill the annular sealed space, and the high-pressure air enters the eccentric roller to drive the detection mechanism to operate, and the blockage of the gaps on the surface of the dust removal bag is detected by the detection mechanism;

[0011] The detection mechanism includes an installation cavity opened between two connecting shafts on the eccentric roller, a slider moving up and down in the inner cavity of the installation cavity, a connecting rod vertically movably installed on the upper surface of the slider through a bearing, an annular turntable arranged above the two eccentric rollers, an annular support plate movably installed in the inner ring of the annular turntable through a bearing, a sliding resistance ring fixed in the inner ring of the annular support plate, a fixed resistance ring vertically arranged in the inner ring of the sliding resistance ring, a resistance detection signal wireless transmitter with a built-in power supply fixed on the bottom surface of the annular support plate, a control panel fixed on the front of the dust removal tank, and a group of ventilation holes equidistantly arranged on the bottom surface of the inner cavity of the installation cavity.

[0012] In the above technical solution, preferably, the connecting mechanism includes a connecting block arranged in the inner cavity of the mounting column, two U-shaped connecting pipes symmetrically fixed on the left and right sides of the bottom surface of the connecting block, an annular chamber opened in the middle of the annular mounting block, and two oblique holes symmetrically opened on the bottom surface of the annular chamber;

[0013] Among them, the lower part of the U-shaped connecting tube passes through to the bottom of the mounting column, the air inlet port of the U-shaped connecting tube passes through to the upper surface of the connecting block, the air outlet end of the U-shaped connecting tube is fixedly connected to the inner ring of the annular mounting block, and the air outlet port of the U-shaped connecting tube is connected to the inner cavity of the inclined hole, the inner cavity of the air outlet channel is connected to the upper part of the inner cavity of the annular chamber, and the top end of the output shaft of the hydraulic rod is fixedly connected to the center of the bottom surface of the connecting block.

[0014] In the above technical solution, preferably, the transmission mechanism includes an impeller rotating in the inner cavity of the annular chamber, an annular shell rotatably sleeved on the outer surface of the annular mounting block, two cross bars symmetrically fixedly mounted on the left and right sides of the outer ring of the annular shell, a sealing block moving left and right in the inner cavity of the cross bar, a mounting frame movably sleeved on the upper and lower ends of the eccentric roller through a bearing, an annular air inlet opening provided on the upper part of the inner ring of the annular shell, and two sets of exhaust holes equidistantly provided on the upper and lower surfaces of the cross bar;

[0015] Among them, the position height of the annular air inlet opening is adapted to that of the air outlet channel, one side of the mounting frame penetrates into the inner cavity of the cross bar and is fixedly connected to the side wall of the sealing block, an annular connecting plate is fixedly installed in the middle of the inner ring of the annular shell, the inner ring of the annular connecting plate penetrates into the inner cavity of the annular chamber, and the inner ring of the annular connecting plate is fixedly connected to the outer ring of the impeller.

[0016] In the above technical solution, preferably, the linkage mechanism includes two annular guide rails symmetrically fixedly installed at the edges of the opposite surfaces of the two annular partition plates and two rollers fixedly sleeved on the connecting shafts at the upper and lower ends of the eccentric roller; wherein the outer ring of the roller is movably connected to the inner ring of the annular guide rails.

[0017] In the above technical scheme, preferably, two moving blocks are symmetrically installed on the left and right sides of the bottom surface of the annular turntable for horizontal sliding, the top end of the connecting rod passes through the upper connecting shaft of the eccentric roller and is movably connected to the bottom surface of the moving block through a bearing, the upper surface of the annular support plate is connected to the bottom surface of an annular partition plate through four spring seats equidistantly arranged circumferentially, the inner ring wall of the sliding resistance ring is movably connected to the outer ring wall of the fixed resistance ring, and the sliding resistance ring and the fixed resistance ring are electrically connected to the resistance detection signal wireless transmitter through wires, respectively.

[0018] In the above technical solution, preferably, an opening is provided at the top of the dust bag, and the top of the dust bag passes through to the bottom of the inner cavity of the exhaust chamber, and the outlet pipe connected to the air outlet port of the high-pressure pump passes through the top opening of the dust bag and is connected to the upper part of the inner cavity of the mounting column.

[0019] In the above technical solution, preferably, a drainage hole is provided on the bottom surface of the inner cavity of the dust removal tank, and the drainage hole is used to communicate with an externally arranged dust collection device.

[0020] In the above technical scheme, preferably, the lower part of the SDS desulfurization reactor is connected with an air intake pipeline, the upper part of the SDS desulfurization reactor is connected with the lower part of the inner cavity of the dust removal tank through a first through pipe, and a second through pipe for connecting the exhaust chamber with the upper part of the inner cavity of the SCR denitrification reactor is provided on the upper side of the outer surface of the dust removal tank, the bottom of the SCR denitrification reactor is connected with an exhaust fan, the exhaust port end of the exhaust fan is connected with the lower part of the inner cavity of the chimney, the outer surface of the SDS desulfurization reactor is connected with a feeder for conveying baking soda powder, and the ammonia water tank is connected with the upper part of the inner cavity of the second through pipe through a third through pipe. Beneficial Effects

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention adopts the coordinated design of the structures such as the high-pressure pump, the dust bag, and the cleaning mechanism. The operator controls the intermittent operation of the hydraulic rod through the external control device, and drives the annular mounting block to drive the two annular partition plates to move upward through the connecting mechanism (when the hydraulic rod operates intermittently, the length of each extension or retraction of its output end is set to be the same as the spacing between the two annular partition plates). The outer rings of the two annular partition plates fit with the inner ring walls of the dust bag to form an annular sealed space. At the same time, the high-pressure pump conveys high-pressure air to between the two annular partition plates through the connecting mechanism, and the high-pressure air can back-blow and clean the inner cavity of the dust bag between the two annular partition plates. The dust collector bags are easily dislodged by the dust collector, and the dust collector bags are easily emptied.

[0023] 2. The present invention adopts the coordinated design of structures such as an annular partition plate, a dust bag, an eccentric roller, and a detection mechanism. When the outer rings of the two annular partition plates are fitted with the inner ring walls of the dust bag to form an annular sealed space, and the high-pressure air back-blows and cleans the inner cavity of the dust bag between the two annular partition plates, when the gaps in the dust bag are severely clogged, the high-pressure air in the annular sealed space enters the eccentric roller through the vent hole. As the air pressure increases, the high-pressure air can push the slider to move upward. When the slider moves, it drives the moving block to move upward through the connecting rod. When the moving block moves, it drives the annular support plate to move through the annular turntable. When the annular support plate moves, it can drive the sliding resistance ring to slide on the outer surface of the fixed resistance ring. The resistance detection signal wireless transmitter can detect the resistance change values ​​on the sliding resistance ring and the fixed resistance ring, and send the detection values ​​to the external operating system, which is convenient for the operator to compare and analyze the gap blockage of the dust bag according to the detection data, and it is convenient for the operator to replace and maintain the dust bag in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the dust removal tank and the high-pressure pump of the present invention;

[0026] Figure 3 It is a partial front cross-sectional structural schematic diagram of the dust removal tank, high-pressure pump, exhaust chamber, dust removal bag, and cleaning mechanism of the present invention;

[0027] Figure 4 It is a front cross-sectional structural schematic diagram of the dust removal bag of the present invention;

[0028] Figure 5 It is a partial front cross-sectional structural schematic diagram of the dust removal bag and the cleaning mechanism of the present invention;

[0029] Figure 6 for Figure 5 An enlarged schematic diagram of part A is shown;

[0030] Figure 7 It is a structural schematic diagram of the annular mounting block and the air outlet channel of the present invention;

[0031] Figure 8 It is a partial front cross-sectional structural schematic diagram of the annular mounting block, annular partition plate, annular chamber, and inclined hole of the present invention;

[0032] Fig. 9 It is a schematic diagram of the top view of the impeller, annular shell, cross bar and exhaust hole of the present invention;

[0033] Fig.10 It is a partial front cross-sectional structural schematic diagram of the eccentric roller and the detection mechanism of the present invention;

[0034] Fig.11 Figure 5 An enlarged schematic diagram of part B is shown.

[0035] In the figure: 1. SDS desulfurization reactor; 2. Feeder; 3. Ammonia tank; 4. SCR denitrification reactor; 5. Dust removal tank; 6. Exhaust chamber; 7. Dust removal bag; 8. Cleaning mechanism; 81. Fixing frame; 82. Mounting column; 83. Annular mounting block; 84. Annular partition plate; 85. Air outlet channel; 86. Eccentric roller; 87. Hydraulic rod; 9. High-pressure pump; 10. Connecting mechanism; 101. Connecting block; 102. U-shaped connecting pipe; 103. Annular chamber; 104. Oblique hole; 11. Transmission mechanism; 111. impeller; 112. annular shell; 113. cross bar; 114. sealing block; 115. mounting frame; 116. annular air inlet opening; 117. exhaust hole; 118. annular connecting plate; 12. linkage mechanism; 121. annular guide rail; 122. roller; 13. detection mechanism; 131. mounting cavity; 132. slider; 133. connecting rod; 134. annular turntable; 135. annular support plate; 136. sliding resistance ring; 137. fixed resistance ring; 138. resistance detection signal wireless transmitter. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] like Figures 1 to 10 As shown, the present invention provides a flue gas low-temperature dry desulfurization and denitrification treatment system, comprising an SDS desulfurization reactor 1, a feeder 2, an ammonia water tank 3, an SCR denitrification reactor 4 and a dust removal tank 5; an exhaust chamber 6 is provided on the upper part of the dust removal tank 5, a dust removal bag 7 is vertically fixedly installed on the top surface of the inner cavity of the dust removal tank 5, a cleaning mechanism 8 is provided in the inner cavity of the dust removal bag 7, and a high-pressure pump 9 is fixedly installed on the top surface of the dust removal tank 5;

[0038] Among them, an opening is provided at the top of the dust bag 7, and the top of the dust bag 7 passes through the bottom of the inner cavity of the exhaust chamber 6, the outlet pipe connected to the outlet port of the high-pressure pump 9 passes through the top opening of the dust bag 7 and is connected to the upper part of the inner cavity of the mounting column 82, the lower part of the SDS desulfurization reactor 1 is connected with an air inlet pipeline, the upper part of the SDS desulfurization reactor 1 is connected with the lower part of the inner cavity of the dust removal tank 5 through a first through-tube, and a second through-tube for connecting the exhaust chamber 6 with the upper part of the inner cavity of the SCR denitrification reactor 4 is provided on one side of the upper part of the outer surface of the dust removal tank 5, an exhaust fan is connected to the bottom of the SCR denitrification reactor 4, and the exhaust port end of the exhaust fan is connected to the lower part of the inner cavity of the chimney, and a feeder 2 for conveying baking soda powder is connected to one side of the outer surface of the SDS desulfurization reactor 1, and the ammonia water tank 3 is connected to the upper part of the inner cavity of the second through-tube through a third through-tube;

[0039] When in use, the flue gas passes through the air intake pipeline into the SDS desulfurization reactor 1, and the feeder 2 transports baking soda to the SDS desulfurization reactor 1 to react with sulfur dioxide in the flue gas to achieve a desulfurization effect. Then the flue gas enters the dust removal tank 5 and passes through the dust removal bag 7 to filter the dust in the flue gas. The flue gas then enters the second through pipe. At the same time, the ammonia water in the ammonia water tank 3 is sprayed into the second through pipe to react with the flue gas, and the flue gas in the second through pipe enters the SCR denitrification reactor 4 to react with the catalyst to reduce the concentration of nitrogen oxides, thereby achieving a denitrification effect. Finally, the exhaust fan discharges the flue gas after desulfurization and denitrification into the atmosphere through the chimney.

[0040] The cleaning mechanism 8 includes a fixing frame 81 fixedly sleeved on the bottom of the outer surface of the dust bag 7, a mounting column 82 vertically arranged in the inner cavity of the dust bag 7, an annular mounting block 83 moving up and down on the outer surface of the mounting column 82, two annular partition plates 84 symmetrically fixedly installed on the upper and lower sides of the annular mounting block 83, a group of air outlet channels 85 equidistantly arranged on the upper part of the outer ring of the annular mounting block 83, a connecting mechanism 10 for conveying high-pressure air arranged in the lower part of the inner ring of the annular mounting block 83 and the inner cavity of the mounting column 82, two eccentric rollers 86 symmetrically arranged on the left and right sides between the two annular partition plates 84, a transmission mechanism 11 arranged on the outer ring of the annular mounting block 83 for driving the eccentric roller 86 to move circumferentially, a linkage mechanism 12 arranged on the opposite surfaces of the two annular partition plates 84 for driving the eccentric roller 86 to rotate, and a detection mechanism 13 arranged on the two eccentric rollers 86;

[0041] Among them, the fixing frame 81 is fixedly connected to the inner cavity of the dust removal tank 5, and a hydraulic rod 87 is vertically fixedly installed at the center of the bottom surface of the fixing frame 81. When the hydraulic rod 87 is in operation, the annular mounting block 83 is driven to move up and down through the connecting mechanism 10. The outer ring of the annular partition plate 84 is movably connected to the inner cavity wall of the dust removal bag 7, and the outer surface of the eccentric roller 86 is movably connected to the inner cavity wall of the dust removal bag 7, and the high-pressure pump 9 can deliver high-pressure air to the inner cavity of the mounting column 82. A sewage discharge hole is provided on the bottom surface of the inner cavity of the dust removal tank 5, and the sewage discharge hole is used to connect with the dust collection equipment arranged externally. The outer ring of the annular partition plate 84 is fixedly sleeved with an annular airbag, which can shrink or expand when subjected to extrusion force, and the outer ring of the airbag fits with the inner cavity of the dust removal bag 7.

[0042] In the initial state, the annular mounting block 83 and the two annular partition plates 84 are located at the bottom of the inner cavity of the dust bag 7. During cleaning, the operator controls the hydraulic rod 87 to operate intermittently through the external control device, and drives the annular mounting block 83 to drive the two annular partition plates 84 to move upward through the connecting mechanism 10. When the hydraulic rod 87 operates intermittently, the length of each extension or retraction of its output end is set to be the same as the distance between the two annular partition plates 84. The outer rings of the two annular partition plates 84 fit the inner ring wall of the dust bag 7 to form an annular sealed space. At the same time, the high-pressure pump 9 is connected through the connecting mechanism 10. The high-pressure air is delivered to between the two annular partition plates 84. The high-pressure air can back-blow and clean the inner cavity of the dust bag 7 between the two annular partition plates 84, and can gradually clean the dust bag 7 in different areas with good cleaning uniformity. At the same time, the airflow of the high-pressure air can drive the eccentric roller 86 to move circumferentially through the transmission mechanism 11, and under the action of the linkage mechanism 12, the eccentric roller 86 can rotate during the circumferential movement. Therefore, when the eccentric roller 86 rotates, its side wall can push the dust bag 7 to expand, which can produce a vibration effect to enhance the effect of cleaning the dust attached to the outer surface of the dust bag 7.

[0043] It should be noted that when the outer ring of the two annular partition plates 84 fits with the inner ring wall of the dust bag 7 to form an annular sealed space, and the high-pressure air back-blows and cleans the inner cavity of the dust bag 7 between the two annular partition plates 84, the high-pressure air will fill the annular sealed space, and the high-pressure air can enter the eccentric roller 86 to drive the detection mechanism 13 to operate. The detection mechanism 13 can detect the blockage of the gaps on the surface of the dust bag 7, thereby improving the practicability of the equipment. At the same time, it is convenient for the operator to compare and analyze the blockage of the gaps of the dust bag 7 according to the detection data, and it is convenient for the operator to replace and maintain the dust bag 7 in time.

[0044] like Figure 5As shown, the connecting mechanism 10 includes a connecting block 101 disposed in the inner cavity of the mounting column 82, two U-shaped connecting pipes 102 symmetrically fixed on the left and right sides of the bottom surface of the connecting block 101, an annular chamber 103 opened in the middle of the annular mounting block 83, and two oblique holes 104 symmetrically opened on the bottom surface of the annular chamber 103;

[0045] Among them, the lower part of the U-shaped connecting tube 102 passes through to the bottom of the mounting column 82, the air inlet port of the U-shaped connecting tube 102 passes through to the upper surface of the connecting block 101, the air outlet end of the U-shaped connecting tube 102 is fixedly connected to the inner ring of the annular mounting block 83, and the air outlet port of the U-shaped connecting tube 102 is connected to the inner cavity of the inclined hole 104, the inner cavity of the air outlet channel 85 is connected to the upper part of the inner cavity of the annular chamber 103, and the top end of the output shaft of the hydraulic rod 87 is fixedly connected to the center of the bottom surface of the connecting block 101.

[0046] When in use, when the output shaft of the hydraulic rod 87 is extended or retracted, it can drive the connecting block 101 to move vertically. When the connecting block 101 moves, it can drive the annular mounting block 83 to drive the two annular partition plates 84 to move through the two U-shaped connecting pipes 102. At the same time, the high-pressure pump 9 delivers high-pressure air to the inner cavity of the mounting column 82, and the high-pressure air enters the inclined hole 104 through the U-shaped connecting pipe 102. When the high-pressure air in the inclined hole 104 enters the annular chamber 103, the high-pressure air can drive the transmission mechanism 11 to operate, so that when the transmission mechanism 11 operates, it can drive the eccentric roller 86 to move circumferentially, and rotate under the action of the linkage mechanism 12, thereby vibrating the dust bag 7 to enhance the cleaning effect. At the same time, the high-pressure air in the annular chamber 103 can enter the sealed space formed by the outer ring of the two annular partition plates 84 and the inner ring wall of the dust bag 7 through the air outlet channel 85, thereby realizing the backblowing and cleaning of the dust bag 7 in different areas.

[0047] like Figure 6 and Fig. 9 As shown, the transmission mechanism 11 includes an impeller 111 rotating in the inner cavity of the annular chamber 103, an annular shell 112 rotatably sleeved on the outer surface of the annular mounting block 83, two cross bars 113 symmetrically fixedly mounted on the left and right sides of the outer ring of the annular shell 112, a sealing block 114 moving left and right in the inner cavity of the cross bar 113, a mounting frame 115 movably sleeved on the upper and lower ends of the eccentric roller 86 through a bearing, an annular air inlet opening 116 provided on the upper part of the inner ring of the annular shell 112, and two sets of exhaust holes 117 equidistantly provided on the upper and lower surfaces of the cross bar 113;

[0048] Among them, the position height of the annular air inlet opening 116 is adapted to that of the air outlet channel 85, one side of the mounting frame 115 penetrates into the inner cavity of the cross bar 113 and is fixedly connected to the side wall of the sealing block 114, and an annular connecting plate 118 is fixedly installed in the middle of the inner ring of the annular shell 112, the inner ring of the annular connecting plate 118 penetrates into the inner cavity of the annular chamber 103, and the inner ring of the annular connecting plate 118 is fixedly connected to the outer ring of the impeller 111.

[0049] During use, when the high-pressure air in the inclined hole 104 enters the annular chamber 103, the high-pressure air can push the impeller 111 to rotate. The rotation of the impeller 111 drives the annular shell 112 to rotate through the annular connecting plate 118. The rotation of the annular shell 112 drives the cross bar 113 to move circumferentially. When the cross bar 113 moves circumferentially, it can drive the eccentric roller 86 to move circumferentially through the mounting frame 115. At the same time, the high-pressure air discharged from the air outlet channel 85 enters the annular shell 112 through the annular air inlet opening 116. Then the high-pressure air pushes the sealing block 114 to move. The sealing block 114 moves and drives the mounting frame 115 to drive the eccentric roller 86 to move, which can activate the linkage mechanism 12, so that the eccentric roller 86 rotates when it moves circumferentially. After the high-pressure air pushes the sealing block 114 to move, it enters the sealed space formed by the outer ring of the two annular partition plates 84 and the inner ring wall of the dust removal bag 7 through the exhaust hole 117.

[0050] like Fig.11 As shown, the linkage mechanism 12 includes two annular guide rails 121 symmetrically fixedly mounted on the edges of the opposite surfaces of the two annular partition plates 84 and two rollers 122 fixedly sleeved on the upper and lower ends of the connecting shaft of the eccentric roller 86; wherein the outer ring of the roller 122 is movably connected to the inner ring of the annular guide rail 121.

[0051] When in use, when the eccentric roller 86 moves in the circumferential direction, the roller 122 and the annular guide rail 121 can cause the eccentric roller 86 to rotate while moving in the circumferential direction.

[0052] like Fig.10 As shown, the detection mechanism 13 includes a mounting cavity 131 provided between two connecting shafts on the eccentric roller 86, a slider 132 moving up and down in the inner cavity of the mounting cavity 131, a connecting rod 133 vertically movably installed on the upper surface of the slider 132 through a bearing, an annular turntable 134 provided above the two eccentric rollers 86, an annular support plate 135 movably installed in the inner ring of the annular turntable 134 through a bearing, a sliding resistance ring 136 fixed in the inner ring of the annular support plate 135, a fixed resistance ring 137 vertically provided in the inner ring of the sliding resistance ring 136, a resistance detection signal wireless transmitter 138 with a built-in power supply fixed on the bottom surface of the annular support plate 135, a control panel fixed on the front of the dust removal tank 5, and a group of vent holes equidistantly provided on the bottom surface of the inner cavity of the mounting cavity 131 in the circumferential direction;

[0053] Among them, two moving blocks are symmetrically installed on the left and right sides of the bottom surface of the annular turntable 134 for horizontal sliding. The top end of the connecting rod 133 passes through the upper connecting shaft of the eccentric roller 86 and is movably connected to the bottom surface of the moving block through a bearing. The upper surface of the annular support plate 135 is connected to the bottom surface of an annular partition plate 84 through four spring seats equidistantly arranged in the circumferential direction. The inner ring wall of the sliding resistance ring 136 is movably connected to the outer ring wall of the fixed resistance ring 137. The sliding resistance ring 136 and the fixed resistance ring 137 are electrically connected to the resistance detection signal wireless transmitter 138 through wires respectively.

[0054] When in use, when the outer rings of the two annular partition plates 84 fit with the inner ring walls of the dust bag 7 to form an annular sealed space, and the high-pressure air back-blows and cleans the inner cavity of the dust bag 7 between the two annular partition plates 84, when the gaps in the dust bag 7 are seriously clogged, the high-pressure air in the annular sealed space enters the eccentric roller 86 through the vent holes. As the air pressure increases, the high-pressure air can push the slider 132 to move upward. When the slider 132 moves, it drives the moving block to move upward through the connecting rod 133, and the moving block moves upward. When the annular support plate 135 is in motion, the annular turntable 134 drives the annular support plate 135 to move. When the annular support plate 135 moves, it can drive the sliding resistance ring 136 to slide on the outer surface of the fixed resistance ring 137. The resistance detection signal wireless transmitter 138 can detect the resistance change values ​​on the sliding resistance ring 136 and the fixed resistance ring 137, and send the detection values ​​to the external operating system, so that the operator can compare and analyze the gap blockage of the dust bag 7 according to the detection data, and it is convenient for the operator to replace and maintain the dust bag 7 in time.

[0055] The working principle and use process of the present invention:

[0056] When in use, first, in the initial state, the annular mounting block 83 and the two annular partition plates 84 are located at the bottom of the inner cavity of the dust bag 7. During cleaning, the operator controls the intermittent operation of the hydraulic rod 87 through an external control device. When the hydraulic rod 87 is intermittently operated, the length of each extension or retraction of its output end is set to be the same as the spacing between the two annular partition plates 84. When the output shaft of the hydraulic rod 87 is extended, it can drive the connecting block 101 to move vertically. When the connecting block 101 moves, it can drive the annular mounting block 83 to drive the two annular partition plates 84 to move through the two U-shaped connecting pipes 102. The outer rings of the two annular partition plates 84 fit with the inner ring wall of the dust bag 7 to form an annular sealed space. At the same time, the high-pressure pump 9 delivers high-pressure air. When the high-pressure air enters the inner cavity of the mounting column 82, the high-pressure air enters the inclined hole 104 through the U-shaped connecting pipe 102. When the high-pressure air in the inclined hole 104 enters the annular chamber 103, the high-pressure air can drive the impeller 111 to rotate. The rotation of the impeller 111 drives the annular shell 112 to rotate through the annular connecting plate 118. The rotation of the annular shell 112 drives the cross bar 113 to move circumferentially. When the cross bar 113 moves circumferentially, it can drive the eccentric roller 86 to move circumferentially through the mounting frame 115. At the same time, the high-pressure air discharged from the air outlet channel 85 enters the annular shell 112 through the annular air inlet opening 116. Then the high-pressure air drives the sealing block 114 to move. The movement of the sealing block 114 drives the mounting frame 115 to drive the eccentric roller 86 to move. When the eccentric roller 86 moves, it drives the roller 122 to fit and squeeze with the inner ring of the annular guide rail 121, so that the eccentric roller 86 rotates during the circumferential movement. When the eccentric roller 86 rotates, its side wall can push the dust bag 7 to expand, which can produce a vibration effect to enhance the effect of cleaning the dust attached to the outer surface of the dust bag 7. At the same time, the high-pressure air pushes the sealing block 114 to move and enters the sealed space formed by the outer ring of the two annular partition plates 84 and the inner ring wall of the dust bag 7 through the exhaust hole 117. The high-pressure air can back-blow and clean the inner cavity of the dust bag 7 between the two annular partition plates 84, which is convenient for gradually cleaning the dust bag 7 in different areas. At the same time, when the gap of the dust bag 7 is seriously blocked, the high-pressure air in the annular sealed space passes through the exhaust hole 117. The air hole enters the eccentric roller 86. As the air pressure increases, the high-pressure air can push the slider 132 to move upward. When the slider 132 moves, the connecting rod 133 drives the moving block to move upward. When the moving block moves, the annular support plate 135 is driven to move through the annular turntable 134. When the annular support plate 135 moves, it can drive the sliding resistance ring 136 to slide on the outer surface of the fixed resistance ring 137. The resistance detection signal wireless transmitter 138 can detect the resistance change values ​​on the sliding resistance ring 136 and the fixed resistance ring 137, and send the detection values ​​to the external operating system, so that the operator can compare and analyze the gap blockage of the dust bag 7 according to the detection data, and it is convenient for the operator to replace and maintain the dust bag 7 in time.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flue gas low-temperature dry desulfurization and denitrification treatment system, characterized in that: It includes an SDS desulfurization reactor, a feeder, an ammonia water tank, an SCR denitrification reactor and a dust removal tank; an exhaust chamber is provided on the upper part of the dust removal tank, a dust removal bag is vertically fixedly installed on the top surface of the inner cavity of the dust removal tank, a cleaning mechanism is provided in the inner cavity of the dust removal bag, and a high-pressure pump is fixedly installed on the top surface of the dust removal tank; The cleaning mechanism includes a fixing frame fixedly sleeved on the bottom of the outer surface of the dust bag, a mounting column vertically arranged in the inner cavity of the dust bag, an annular mounting block moving up and down on the outer surface of the mounting column, two annular partition plates symmetrically fixedly installed on the upper and lower sides of the annular mounting block, a group of air outlet channels equidistantly arranged on the upper part of the outer ring of the annular mounting block, a connecting mechanism for conveying high-pressure air arranged in the lower part of the inner ring of the annular mounting block and the inner cavity of the mounting column, two eccentric rollers symmetrically arranged on the left and right sides between the two annular partition plates, a transmission mechanism arranged on the outer ring of the annular mounting block for driving the eccentric roller to move circumferentially, a linkage mechanism arranged on the opposite surfaces of the two annular partition plates for driving the eccentric roller to rotate, and a detection mechanism arranged on the two eccentric rollers; Among them, the fixing frame is fixedly connected to the inner cavity of the dust removal tank, and a hydraulic rod is vertically fixedly installed at the center of the bottom surface of the fixing frame. When the hydraulic rod is in operation, the annular mounting block is driven to move up and down through the connecting mechanism, and the outer ring of the annular partition plate is movably connected to the inner cavity wall of the dust removal bag, and the outer surface of the eccentric roller is movably connected to the inner cavity wall of the dust removal bag, and the high-pressure pump can deliver high-pressure air to the inner cavity of the mounting column; The outer rings of the two annular partition plates fit together with the inner ring walls of the dust bag to form an annular sealed space. When high-pressure air back-blows and cleans the inner cavity of the dust bag between the two annular partition plates, the high-pressure air will fill the annular sealed space. The high-pressure air enters the eccentric roller to drive the detection mechanism to operate, and the detection mechanism is used to detect the blockage of gaps on the surface of the dust bag.

2. A flue gas low-temperature dry desulfurization and denitrification treatment system according to claim 1, characterized in that: The communication mechanism includes a connection block arranged in the inner cavity of the mounting column, two U-shaped communication pipes symmetrically fixed on the left and right sides of the bottom surface of the connection block, an annular chamber opened in the middle of the annular mounting block, and two oblique holes symmetrically opened on the bottom surface of the annular chamber; Among them, the lower part of the U-shaped connecting tube passes through to the bottom of the mounting column, the air inlet port of the U-shaped connecting tube passes through to the upper surface of the connecting block, the air outlet end of the U-shaped connecting tube is fixedly connected to the inner ring of the annular mounting block, and the air outlet port of the U-shaped connecting tube is connected to the inner cavity of the inclined hole, the inner cavity of the air outlet channel is connected to the upper part of the inner cavity of the annular chamber, and the top end of the output shaft of the hydraulic rod is fixedly connected to the center of the bottom surface of the connecting block.

3. A flue gas low-temperature dry desulfurization and denitrification treatment system according to claim 2, characterized in that: The transmission mechanism includes an impeller rotating in the inner cavity of the annular chamber, an annular shell rotatably sleeved on the outer surface of the annular mounting block, two cross bars symmetrically fixedly mounted on the left and right sides of the outer ring of the annular shell, a sealing block moving left and right in the inner cavity of the cross bar, a mounting frame movably sleeved on the upper and lower ends of the eccentric roller through a bearing, an annular air inlet opening provided on the upper part of the inner ring of the annular shell, and two sets of exhaust holes equidistantly provided on the upper and lower surfaces of the cross bar; Among them, the position height of the annular air inlet opening is adapted to that of the air outlet channel, one side of the mounting frame penetrates into the inner cavity of the cross bar and is fixedly connected to the side wall of the sealing block, an annular connecting plate is fixedly installed in the middle of the inner ring of the annular shell, the inner ring of the annular connecting plate penetrates into the inner cavity of the annular chamber, and the inner ring of the annular connecting plate is fixedly connected to the outer ring of the impeller.

4. A flue gas low-temperature dry desulfurization and denitrification treatment system according to claim 1, characterized in that: The linkage mechanism comprises two annular guide rails symmetrically fixedly mounted on the edges of the opposite surfaces of the two annular partition plates and two rollers fixedly sleeved on the upper and lower ends of the eccentric roller shaft; wherein the outer ring of the roller is movably connected to the inner ring of the annular guide rails.

5. A flue gas low-temperature dry desulfurization and denitrification treatment system according to claim 1, characterized in that: The detection mechanism includes an installation cavity provided between two connecting shafts on the eccentric roller, a slider moving up and down in the inner cavity of the installation cavity, a connecting rod vertically movably installed on the upper surface of the slider through a bearing, an annular turntable provided above the two eccentric rollers, an annular support plate movably installed in the inner ring of the annular turntable through a bearing, a sliding resistance ring fixed in the inner ring of the annular support plate, a fixed resistance ring vertically provided in the inner ring of the sliding resistance ring, a resistance detection signal wireless transmitter with a built-in power supply fixed on the bottom surface of the annular support plate, a control panel fixed on the front of the dust removal tank, and a group of vent holes equidistantly provided on the bottom surface of the inner cavity of the installation cavity in the circumferential direction; Two moving blocks are symmetrically installed on the left and right sides of the bottom surface of the annular turntable for horizontal sliding. The top end of the connecting rod passes through the upper connecting shaft of the eccentric roller and is movably connected to the bottom surface of the moving block through a bearing. The upper surface of the annular support plate is connected to the bottom surface of an annular partition plate through four spring seats equidistantly arranged in the circumferential direction. The inner ring wall of the sliding resistance ring is movably connected to the outer ring wall of the fixed resistance ring. The sliding resistance ring and the fixed resistance ring are electrically connected to the resistance detection signal wireless transmitter through wires respectively.

6. A flue gas low-temperature dry desulfurization and denitrification treatment system according to claim 1, characterized in that: An opening is provided at the top of the dust bag, and the top of the dust bag passes through the bottom of the inner cavity of the exhaust chamber. The outlet pipe connected to the outlet port of the high-pressure pump passes through the top opening of the dust bag and is connected to the upper part of the inner cavity of the mounting column.

7. A flue gas low-temperature dry desulfurization and denitrification treatment system according to claim 1, characterized in that: A drain hole is provided on the bottom surface of the inner cavity of the dust removal tank, and the drain hole is used to communicate with an externally arranged dust collection device.

8. A flue gas low-temperature dry desulfurization and denitrification treatment system according to claim 1, characterized in that: The lower part of the SDS desulfurization reactor is connected to an air intake pipeline, the upper part of the SDS desulfurization reactor is connected to the lower part of the inner cavity of the dust removal tank through a first through-pipe, and a second through-pipe for connecting the exhaust chamber with the upper part of the inner cavity of the SCR denitrification reactor is provided on one side of the upper part of the outer surface of the dust removal tank. The bottom of the SCR denitrification reactor is connected to an exhaust fan, and the exhaust port end of the exhaust fan is connected to the lower part of the inner cavity of the chimney. A feeder for conveying baking soda powder is connected to one side of the outer surface of the SDS desulfurization reactor, and the ammonia water tank is connected to the upper part of the inner cavity of the second through-pipe through a third through-pipe.

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