A dust removal and desulfurization device for coal-fired boiler flue gas

Abstract

The present invention mentions a dust removal and desulfurization device for flue gas from coal-fired boilers, which is mainly aimed at the technical field of flue gas treatment devices. A dust removal and desulfurization device for flue gas from coal-fired boilers, comprising a support frame, the support frame is fixedly connected to a desulfurization tower, the top of the desulfurization tower is provided with an air outlet, the bottom of the desulfurization tower is provided with a discharge port, the outer side of the desulfurization tower is fixedly connected to an annular shell, the desulfurization tower is provided with a rectangular through hole connected to the annular shell, the annular shell is connected with an air inlet, a water distributor for spraying alkali liquid is provided in the desulfurization tower, the annular shell is rotatably connected to a rotating sleeve rotatably connected to the outer side of the desulfurization tower, and the rotating sleeve is fixedly connected to an annular net located in the annular shell. The present invention intercepts and filters impurity particles in the flue gas by a rotating annular net, thereby preventing impurity particles from entering the desulfurization tower and affecting the reaction between the flue gas and the alkali liquid therein.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas treatment devices, and in particular proposes a dust removal and desulfurization device for flue gas from a coal-fired boiler. Background Art

[0002] A large amount of harmful flue gas is generated when a coal-fired furnace is in operation. The flue gas contains substances such as hydrosulfide. If it is directly discharged into the atmosphere, it will pollute the environment. Therefore, the flue gas needs to be dusted and desulfurized before it is discharged into the atmosphere. The commonly used desulfurization method is wet desulfurization, which uses an alkaline solution to neutralize the hydrosulfide in the flue gas to eliminate the hydrosulfide in the flue gas. Before the flue gas is desulfurized, it is necessary to use a filter to intercept the impurity particles in the flue gas to ensure that the subsequent flue gas fully reacts with the alkaline solution. However, too much impurities accumulated on the filter will not only affect the flow rate of the subsequent flue gas, but also make it difficult to clean the impurities on the filter, thereby affecting the flue gas treatment efficiency. Summary of the invention

[0003] In order to solve the technical problem that the flue gas easily blocks the filter screen and affects the flue gas intake speed, the present invention provides a dust removal and desulfurization device for the flue gas of a coal-fired boiler.

[0004] The technical solution is: a dust removal and desulfurization device for coal-fired boiler flue gas, comprising a support frame, the support frame is fixedly connected to a desulfurization tower, the top of the desulfurization tower is provided with an air outlet, the bottom of the desulfurization tower is provided with a discharge port, the outer side of the desulfurization tower is fixedly connected to an annular shell, the desulfurization tower is provided with a rectangular through hole connected to the annular shell, the annular shell is connected to an air inlet, a water distributor for spraying alkali liquid is provided in the desulfurization tower, the annular shell is rotatably connected to a rotating sleeve rotatably connected to the outer side of the desulfurization tower, the rotating sleeve is fixedly connected to an annular net located in the annular shell, the desulfurization tower is fixedly connected to a double-axis motor, the output shaft of the double-axis motor close to the air inlet side is transmitted to the rotating sleeve through a first power assembly, a recoil mechanism is provided on the side of the desulfurization tower away from the air inlet, the recoil mechanism is used to recoil impurities accumulated on the annular net, and a diversion mechanism is provided in the desulfurization tower, the diversion mechanism is used to evenly disperse the flue gas entering the desulfurization tower.

[0005] As a preferred embodiment, the recoil mechanism includes a fixed shell, which is fixedly connected to the side of the desulfurization tower away from the air inlet, a push plate is slidably connected in the fixed shell, a first spring is fixedly connected between the push plate and the fixed shell, the push plate is provided with a through hole, the side of the fixed shell away from the push plate is provided with a through hole, the through hole of the push plate and the through hole of the fixed shell are both provided with a one-way valve, the desulfurization tower is provided with an air storage chamber, the desulfurization tower is provided with an air guide hole connected to the air storage chamber, the air guide hole is connected to the fixed shell, the side of the annular shell away from the air inlet is connected to a material guide shell, the push plate is provided with a driving component, and the driving component is used to drive the push plate to move longitudinally.

[0006] Preferably, the driving component includes a guide rod, which is fixed to the push plate and slidably connected to the fixed shell. The outer annular surface of the rotating sleeve is provided with a folding groove that slidably cooperates with the guide rod, and the folding groove consists of a continuous vertical portion and an inclined portion.

[0007] As a preferred embodiment, the diversion mechanism includes a diversion shell, which is fixed in the desulfurization tower, and is provided with a rectangular groove connected to the rectangular through hole of the desulfurization tower. The top of the diversion shell is provided with exhaust ports that are evenly and evenly spaced. A sliding frame is slidably connected to the diversion shell through a support plate, and the sliding frame is fixed with a pressure plate slidably connected to the rectangular groove, and the pressure plate is provided with a through hole. A second spring is fixed between the pressure plate and the support plate in the diversion shell, and the sliding frame is fixed with sealing plates distributed at equal intervals, and the sealing plates are used to block adjacent exhaust ports. The diversion shell is provided with arc grooves distributed in a ring shape.

[0008] As a preference, a truncated cone-shaped protrusion is provided on the top of the diverter shell at the exhaust port.

[0009] As a preference, baffles with equal spacing are fixedly connected in the desulfurization tower, the baffles with equal spacing are all located above the diversion shell, the cross-section of the baffles is triangular, and the baffles are used to shield the adjacent exhaust ports.

[0010] As a preferred embodiment, a stirring mechanism is further included, which is arranged on the support frame. The stirring mechanism is used to stir the alkali solution in the desulfurization tower. The stirring mechanism includes a rotating sleeve, which is rotatably connected to the support frame through a support plate. The output shaft of the dual-axis motor away from the air inlet side is transmitted to the rotating sleeve through a second power assembly. Telescopic rods with circumferentially evenly spaced distribution are fixedly connected to the top of the rotating sleeve. The telescopic rods are fixedly connected to a stirring member, which consists of a vertical rod and horizontal plates with evenly spaced distribution. The desulfurization tower is provided with a gathering mechanism for collecting solid matter therein.

[0011] As a preferred embodiment, the material collecting mechanism includes a sliding sleeve, the sliding sleeve is slidably connected to the bottom of the desulfurization tower, the sliding sleeve is slidably connected to the rotating sleeve, the sliding sleeve is fixedly connected to a conical net located at the bottom of the desulfurization tower, the desulfurization tower is fixedly connected to an electric push rod, the telescopic end of the electric push rod is fixedly connected to a fixed plate, the side of the fixed plate away from the telescopic end of the electric push rod is fixedly connected to a collecting plate, the collecting plate is fixedly connected to a side of the sliding sleeve away from the desulfurization tower, the sliding sleeve is rotatably connected to a fixed sleeve fixed to the stirring element at equal intervals in the circumferential direction, the rotating sleeve is provided with feed troughs distributed at equal intervals in the circumferential direction, the support frame is fixedly connected to a collecting barrel located directly below the rotating sleeve, and the sliding sleeve is provided with a collecting component for collecting solid matter in the desulfurization tower.

[0012] Preferably, the collecting assembly includes a push ring, the sliding sleeve is provided with an annular groove, the push ring is slidably connected in the annular groove, the push ring is fixed with symmetrically distributed L-shaped rods that are slidably connected to the sliding sleeve, a tension spring is fixed between the L-shaped rods and the sliding sleeve, the desulfurization tower is fixed with symmetrically distributed limit rods that are limited by adjacent L-shaped rods, the sliding sleeve is provided with a guide hole connected to the annular groove, and a one-way valve and a filter are provided in the guide hole.

[0013] As a preference, the height of the inner ring surface of the push ring is higher than the height of the outer ring surface.

[0014] Compared with the prior art, the present invention has the following advantages: the present invention intercepts and filters impurity particles in the flue gas through a rotating annular net, thereby preventing impurity particles from entering the desulfurization tower and affecting the reaction of the flue gas and alkali solution therein, and adjusting the flow area of ​​the exhaust port according to the content of the flue gas entering the diversion shell to ensure that the content of flue gas discharged from each exhaust port is equal, so that the flue gas is evenly distributed in the desulfurization tower, ensuring that the flue gas is fully in contact with the alkali solution, and regularly discharging the solids precipitated from the solution to reduce the solid content in the solution and increase the precipitation rate of the solids. At the same time, the conical net will scrape off the solids on the inner wall of the desulfurization tower to prevent the solids from accumulating on the inner wall of the desulfurization tower for a long time, which makes it difficult to clean up later. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0016] Figure 2 It is a cross-sectional view of the three-dimensional structure of the present invention;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the recoil mechanism of the present invention;

[0018] Figure 4 It is a three-dimensional structural schematic diagram of the diversion mechanism of the present invention;

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the blocking plate and the exhaust port of the present invention.

[0020] Figure 6 It is a three-dimensional structural schematic diagram of the stirring mechanism of the present invention;

[0021] Figure 7 It is a three-dimensional structural schematic diagram of the material collecting mechanism of the present invention;

[0022] Figure 8 It is a schematic diagram of the three-dimensional structure of the collecting component of the present invention.

[0023] Figure numerals: 1-support frame, 2-desulfurization tower, 201-air outlet, 202-discharge port, 203-air storage chamber, 204-air guide hole, 3-annular shell, 4-air inlet, 5-rotating sleeve, 501-folding groove, 6-annular net, 7-dual-axis motor, 8-fixed shell, 9-push plate, 10-first spring, 11-material guide shell, 12-guide rod, 13-diverter shell, 1301-rectangular groove, 1302-exhaust port, 1303-arc Groove, 14-sliding frame, 15-pressure plate, 16-second spring, 17-sealing plate, 18-shielding plate, 19-rotating sleeve, 1901-feeding trough, 20-telescopic rod, 21-stirring member, 22-sliding sleeve, 2201-annular groove, 2202-guide hole, 23-conical net, 24-electric push rod, 25-fixed plate, 26-collecting tray, 27-fixed sleeve, 28-push ring, 29-L-shaped rod, 30-tension spring, 31-limiting rod. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0025] Example 1: A dust removal and desulfurization device for coal-fired boiler flue gas, such as Figure 1 and Figure 2As shown, it includes a support frame 1, a desulfurization tower 2 is fixedly connected to the upper side of the support frame 1, an air outlet 201 is arranged on the top of the desulfurization tower 2, and the air outlet 201 is used to discharge the flue gas after desulfurization in the desulfurization tower 2 is completed, and a discharge port 202 is arranged on the left side of the bottom of the desulfurization tower 2, and the discharge port 202 is used to discharge the solution in the desulfurization tower 2, and an annular shell 3 is fixedly connected to the upper part of the outer side of the desulfurization tower 2, and a rectangular through hole connected to the annular shell 3 is arranged on the right side of the desulfurization tower 2, and the annular shell 3 is connected to the air inlet 4, and the flue gas enters the desulfurization tower 2 through the air inlet 4, the annular shell 3 and the rectangular through hole of the desulfurization tower 2, and a water distributor for spraying alkali solution is arranged in the desulfurization tower 2, and the water distributor is used to spray the alkali solution evenly downward and mix with the flue gas transported upward. The lower side of the annular shell 3 is rotatably connected to a rotating sleeve 5 rotatably connected to the outer side of the desulfurization tower 2. The rotating sleeve 5 is fixedly connected to an annular net 6 located inside the annular shell 3. The flue gas will contact the annular net 6 during the process of passing through the annular shell 3, and the impurity particles in the flue gas will adhere to the annular net 6. A dual-axis motor 7 is fixedly connected to the right side of the desulfurization tower 2. The output shaft on the upper side of the dual-axis motor 7 is fixedly connected to a gear, and the lower side of the outer ring surface of the rotating sleeve 5 is fixedly connected to a gear ring. The gear of the output shaft on the upper side of the dual-axis motor 7 is meshed with the gear ring of the rotating sleeve 5. A recoil mechanism is provided on the left side of the desulfurization tower 2. The recoil mechanism is used to recoil impurities accumulated on the annular net 6. A diversion mechanism is provided in the desulfurization tower 2. The diversion mechanism is used to evenly disperse the flue gas entering the desulfurization tower 2.

[0026] like Figure 1-Figure 4 As shown, the recoil mechanism includes a fixed shell 8, which is fixedly connected to the left side of the desulfurization tower 2. A push plate 9 is slidably connected to the upper side of the fixed shell 8. A first spring 10 is fixedly connected between the lower surface of the push plate 9 and the bottom of the fixed shell 8. A through hole is provided on the left side of the push plate 9, and a through hole is provided on the lower side of the fixed shell 8. Both the through hole of the push plate 9 and the through hole of the fixed shell 8 are provided with a one-way valve. External gas enters the fixed shell 8 through the one-way valve of the through hole at the bottom of the fixed shell 8, and the gas on the lower side of the push plate 9 enters the fixed shell 8 through the one-way valve in the through hole of the push plate 9. On the upper side of the push plate 9, an air storage chamber 203 is arranged on the left side of the desulfurization tower 2, and an air guide hole 204 connected with the air storage chamber 203 is arranged on the left side of the desulfurization tower 2. The air guide hole 204 is connected with the right side of the upper part of the fixed shell 8, and the left side of the annular shell 3 is connected with the material guide shell 11. The push plate 9 moves upward rapidly to push the gas on it into the air storage chamber 203 through the air guide hole 204. The increase in the amount of gas in the air storage chamber 203 recoils on the left side of the annular net 6. The push plate 9 is provided with a driving component, and the driving component is used to drive the push plate 9 to move longitudinally.

[0027] like Figure 3 and Figure 4As shown, the driving component includes a guide rod 12, which is fixed to the upper surface of the push plate 9. The guide rod 12 is L-shaped and is slidably connected to the top of the fixed shell 8. The outer ring surface of the rotating sleeve 5 is provided with a folding groove 501 that slidably cooperates with the guide rod 12. The folding groove 501 is composed of a continuous vertical portion and an inclined portion. The rotating sleeve 5 rotates clockwise to drive the guide rod 12 to reciprocate up and down through the folding groove 501. The width of the inclined portion of the folding groove 501 is equal to the diameter of the guide rod 12, and the width of the vertical portion of the folding groove 501 is greater than the diameter of the guide rod 12.

[0028] like Figure 2 , Figure 4 and Figure 5 As shown, the diversion mechanism includes a diversion shell 13, which is fixedly connected to the desulfurization tower 2. A rectangular groove 1301 connected to the rectangular through hole of the desulfurization tower 2 is arranged on the right side of the diversion shell 13. The flue gas from the rectangular through hole of the desulfurization tower 2 enters the diversion shell 13 through the rectangular groove 1301. The top of the diversion shell 13 is provided with exhaust ports 1302 evenly and evenly spaced. The bottom of the diversion shell 13 is slidably connected to a sliding frame 14 through a support plate. The sliding frame 14 is composed of an L-shaped rod on the lower side and a horizontal plate on the upper side. The right end of the L-shaped rod of the sliding frame 14 is fixedly connected to a pressure plate 15 slidably connected to the rectangular groove 1301. The pressure plate 15 is provided with a through hole. A second spring 16 is fixedly connected between the pressure plate 15 and the support plate in the diversion shell 13. When the flue gas content is too much, the pressure on the right side of the pressure plate 15 increases, driving the pressure The disk 15 moves to the left, and the second spring 16 is compressed. The transverse plate of the sliding frame 14 is fixedly connected with the blocking plates 17 which are evenly spaced. The blocking plates 17 are used to block the adjacent exhaust port 1302. The blocking plates 17 move to the left, and the flow area of ​​the exhaust port 1302 increases. The diverter shell 13 is provided with arc grooves 1303 which are distributed in a ring shape. The arc grooves 1303 are used to discharge the solution on the upper surface of the diverter shell 13 downward. A truncated cone-shaped protrusion is provided at the top of the diverter shell 13 at the exhaust port 1302 to prevent the solution on the upper surface of the diverter shell 13 from entering the exhaust port 1302. The desulfurization tower 2 is fixedly connected with the shielding plates 18 which are evenly spaced on the left and right. The shielding plates 18 which are evenly spaced are all located above the diverter shell 13. The cross section of the shielding plates 18 is triangular. The shielding plates 18 are used to block the adjacent exhaust port 1302.

[0029] When it is necessary to use the dust removal and desulfurization device to carry out dust removal and desulfurization treatment on the flue gas, the operator passes the flue gas to be treated into the air inlet 4, the flue gas enters the right side of the annular shell 3 and passes through the mesh of the annular net 6. In the process of the flue gas passing through the mesh of the annular net 6, the dust particles in the flue gas are intercepted by the annular net 6 and adhere to the annular net 6. At the same time, the operator starts the double-axis motor 7, and the output shaft on the upper side of the double-axis motor 7 drives the rotating sleeve 5 to rotate clockwise through the first transmission assembly, and the rotating sleeve 5 drives the annular net 6 to rotate clockwise. Since the annular net 6 is constantly rotating, the impurities in the smoke will be evenly distributed on the annular net 6, and there will be no situation where impurities accumulate too much at a certain place in the annular net 6, making it difficult to clean up later. The dust removal process is completed, and the impurity particles in the flue gas are intercepted and filtered by the rotating annular net 6, thereby preventing the impurity particles from entering the desulfurization tower 2 and affecting the reaction between the flue gas and the alkali solution therein.

[0030] In the initial state, the upper side of the guide rod 12 is located on the upper side of the vertical part of the folding groove 501. During the clockwise rotation of the rotating sleeve 5, the guide rod 12 slides along the inclined part of the folding groove 501, and the guide rod 12 drives the push plate 9 to move downward, and the first spring 10 is compressed. During the downward movement of the push plate 9, the pressure below the push plate 9 increases, the one-way valve in the through hole of the push plate 9 opens, and the one-way valve in the bottom through hole of the fixed shell 8 is closed. The gas on the lower side of the push plate 9 is gradually located on its upper side. When the upper side of the guide rod 12 moves to the lower side of the inclined part of the folding groove 501, the first spring 10 is no longer compressed. As the rotating sleeve 5 continues to rotate, the upper side of the guide rod 12 enters the lower side of the vertical part of the folding groove 501, and the guide rod 12 is no longer limited by the inclined part of the folding groove 501. The first spring 10 in the compressed state resets and drives the push plate 9 to move upward quickly. The push plate 9 drives the guide rod 12 moves upward quickly. During the upward movement of the push plate 9, the pressure on the lower side of the push plate 9 decreases, the one-way valve in the through hole of the push plate 9 is closed, and the one-way valve in the through hole at the bottom of the fixed shell 8 is opened, and the external gas enters the bottom of the push plate 9 through the through hole at the bottom of the fixed shell 8. At the same time, the push plate 9 moves upward and pushes the gas on it into the gas storage chamber 203 through the gas guide hole 204. The gas content in the gas storage chamber 203 increases rapidly, and quickly impacts the left side of the inner ring surface of the annular net 6, and blows the impurities adhered to the left side of the annular net 6 into the guide shell 11, so as to prevent the impurities from blocking the mesh holes on the annular net 6, thereby affecting the filtering effect of the annular net 6 on smoke and dust. Finally, the impurities blown back are discharged from the lower part of the left side of the guide shell 11, and the operator collects the discharged impurities. When the guide rod 12 is located on the upper side of the vertical part of the folding groove 501 again, the above steps are repeated to backflush other parts of the annular net 6.

[0031] The flue gas filtered by the annular net 6 passes through the rectangular through hole on the right side of the desulfurization tower 2 and enters the rectangular groove 1301. After the flue gas contacts the pressure plate 15, it passes through the through hole on it and enters the diversion shell 13, and is finally discharged upward from the exhaust port 1302. Since the exhaust ports 1302 are evenly distributed, the flue gas discharged from the exhaust ports 1302 is evenly distributed in the desulfurization tower 2 and flows upward. Subsequently, the operator starts the water distributor above the desulfurization tower 2 to spray alkali solution downward. The falling alkali solution contacts and reacts with the hydrosulfide in the smoke. The two The mixture of substances falls and enters the upper surface of the diverter shell 13 after being blocked by the baffle plate 18. The baffle plate 18 prevents the falling liquid from entering the exhaust port 1302. Since the exhaust port 1302 protrudes upward, the mixture accumulated on the upper surface of the diverter shell 13 does not enter the exhaust port 1302, but passes through the arc groove 1303 downward into the lower part of the desulfurization tower 2 and accumulates. Sulfite or sulfate (solid) will continuously precipitate from the solution in the desulfurization tower 2, and the flue gas after contacting the alkali solution continues to be discharged upward from the outlet 201.

[0032] Due to the different flue gas contents entering the diverter shell 13, when the flue gas content entering the diverter shell 13 is less, the flue gas does not have enough power to move to the left, but is directly discharged upward through some exhaust ports 1302 on the right, which eventually causes the flue gas discharged from the diverter shell 13 to be concentrated on the right side of the desulfurization tower 2, which is not conducive to full contact between the flue gas and the alkali solution. Therefore, when the flue gas content entering the diverter shell 13 is less, it is necessary to reduce the flow area of ​​the exhaust port 1302 to ensure that the amount of flue gas entering the diverter shell 13 through each exhaust port 1302 is equal. The specific operation is as follows: when the flue gas content entering the diverter shell 13 is less, the impact force of the flue gas is small, and the flue gas is not enough to push the pressure plate 15 to move to the left. At the same time, the second spring 16 will not be compressed, and the sliding frame 14 and the sealing plate 17 thereon will not move to the left Move, and the blocking plate 17 always blocks the adjacent exhaust port 1302 to ensure that the exhaust port 1302 has a smaller flow area, so that the flue gas content discharged from each exhaust port 1302 is equal. When the flue gas content entering the diversion shell 13 is too much, the flue gas has enough impact force to drive the pressure plate 15 to move to the left, the second spring 16 is compressed, the sliding frame 14 and the blocking plate 17 thereon move to the left, and the flow area of ​​the exhaust port 1302 gradually increases to avoid the exhaust port 1302 still maintaining a small flow area to affect the transportation of the flue gas. In summary, the flow area of ​​the exhaust port 1302 is adjusted according to the content of the flue gas entering the diversion shell 13 to ensure that the flue gas content discharged from each exhaust port 1302 is equal, so that the flue gas is evenly distributed in the desulfurization tower 2 to ensure that the flue gas is in full contact with the alkali solution.

[0033] When all the flue gas treatment is completed, the operator stops the dual-axis motor 7, and then the operator opens the discharge port 202. The solution and solid in the desulfurization tower 2 are discharged from the discharge port 202. The operator collects the discharged solution and solid. After all the solution and solid in the desulfurization tower 2 are discharged, the operator seals the discharge port 202, and the use of the device is completed.

[0034] Embodiment 2: Based on embodiment 1, Figure 2 and Figure 6 As shown, it also includes a stirring mechanism, which is arranged on the support frame 1. The stirring mechanism is used to stir the alkali solution in the desulfurization tower 2 to accelerate the precipitation rate of sulfite or sulfate in the solution. The stirring mechanism includes a rotating sleeve 19, which is rotatably connected to the support frame 1 through a support plate. The output shaft on the lower side of the dual-axis motor 7 and the lower side of the rotating sleeve 19 are both fixedly connected with sprockets. A chain is wound between the sprocket of the output shaft on the lower side of the dual-axis motor 7 and the sprocket of the rotating sleeve 19. Three telescopic rods 20 distributed at equal intervals in the circumferential direction are fixedly connected to the top of the rotating sleeve 19. A stirring member 21 is fixedly connected to the lower end of the telescopic rod 20. The stirring member 21 consists of a vertical rod and a horizontal plate distributed at equal intervals. The rotating sleeve 19 drives the stirring member 21 to rotate through the telescopic rod 20 to accelerate the precipitation rate of sulfite or sulfate in the solution in the stirring desulfurization tower 2. The desulfurization tower 2 is provided with a gathering mechanism for collecting solid matter therein.

[0035] like Figure 2 and Figure 6-Figure 8 As shown, the material collecting mechanism includes a sliding sleeve 22, which is slidably connected to the bottom of the desulfurization tower 2, and the sliding sleeve 22 is slidably connected to the outer side of the rotating sleeve 19. The top of the sliding sleeve 22 is fixedly connected to a conical net 23 located at the bottom of the desulfurization tower 2. The solid precipitated from the solution in the desulfurization tower 2 will accumulate on the conical net 23. An electric push rod 24 is fixedly connected to the lower side of the left part of the desulfurization tower 2, and a fixed plate 25 is fixedly connected to the telescopic end of the electric push rod 24. A material collecting plate 26 is fixedly connected to the right side of the fixed plate 25. The material collecting plate 26 is fixedly connected to the lower side of the sliding sleeve 22, and the top of the sliding sleeve 22 rotates. A fixed sleeve 27 fixedly connected to the three stirring members 21 is connected, and feed grooves 1901 equidistantly distributed in the circumferential direction are arranged on the upper side of the rotating sleeve 19. The conical net 23 moves upward to push the solids thereon upward. When the inner side of the conical net 23 is at the same height as the lower side of the feed groove 1901, the solids on the conical net 23 enter the rotating sleeve 19 through the feed groove 1901. A collecting barrel located directly below the rotating sleeve 19 is fixedly connected to the lower side of the support frame 1. The collecting barrel is used to collect the solids discharged downward from the rotating sleeve 19, and the sliding sleeve 22 is provided with a collecting component for collecting solid matter in the desulfurization tower 2.

[0036] like Figure 7 and Figure 8As shown, the collecting assembly includes a push ring 28, and the sliding sleeve 22 is provided with an annular groove 2201. The push ring 28 is slidably connected in the annular groove 2201. In the initial state, the push ring 28 is located on the upper side of the annular groove 2201, and the height of the inner ring surface of the push ring 28 is higher than the height of the outer ring surface. The push ring 28 is fixedly connected with two L-shaped rods 29 that are symmetrically distributed on the left and right and are both slidably connected to the sliding sleeve 22. A tension spring 30 is fixedly connected between the L-shaped rod 29 and the sliding sleeve 22. The lower surface of the desulfurization tower 2 is fixedly connected with two L-shaped rods 29 that are symmetrically distributed on the left and right and are connected to the adjacent L-shaped rods 29. 9 The limiting rod 31 is matched with the limiting rod 31, and the sliding sleeve 22 drives the two L-shaped rods 29 to move upward through the push ring 28. When the L-shaped rod 29 contacts the adjacent limiting rod 31, the L-shaped rod 29 no longer moves upward. The sliding sleeve 22 is provided with a guide hole 2202 connected with the annular groove 2201. A one-way valve and a filter screen are provided in the guide hole 2202. The solution in the annular groove 2201 enters the desulfurization tower 2 through the guide hole 2202, and the solid in the annular groove 2201 cannot enter the desulfurization tower 2 through the guide hole 2202.

[0037] During the operation of the dual-axis motor 7, the output shaft at the lower side of the dual-axis motor 7 drives the rotating sleeve 19 to rotate through the second power assembly. The rotating sleeve 19 drives the three stirring members 21 to rotate through the three telescopic rods 20 to stir the solution in the desulfurization tower 2, thereby accelerating the precipitation rate of sulfite or sulfate in the solution in the desulfurization tower 2. The three stirring members 21 drive the fixed sleeve 27 to rotate. Since the precipitated sulfite or sulfate is solid, the solid is used to represent sulfite or sulfate in the following text. Excessive precipitation of solid will affect the subsequent precipitation rate of solid, so it is necessary to determine the precipitation rate of the fixed sleeve 27. The solids precipitated in the solution are discharged in a period of time. The specific operation is as follows: the operator starts the electric push rod 24. The telescopic end of the electric push rod 24 drives the sliding sleeve 22 to move upward through the fixed plate 25 and the collecting plate 26. The sliding sleeve 22 drives the conical net 23 to move upward. Solids are accumulated on the upper side of the conical net 23. During the upward movement of the conical net 23, the conical net 23 intercepts the solids in the solution and pushes them upward. The upward movement of the conical net 23 will also scrape off the solids adhered to the inner wall of the desulfurization tower 2. During the upward movement of the sliding sleeve 22, the sliding sleeve 2 2 drives the fixed sleeve 27 and the three stirring members 21 to move upward, and the three telescopic rods 20 are compressed. When the inner side of the conical net 23 is at the same height as the lower side of the feed trough 1901, the operator stops the electric push rod 24, and the conical net 23 no longer moves upward. The conical net 23 is higher than the liquid level. The solid on the upper side of the conical net 23 enters the rotating sleeve 19 through the feed trough 1901 and moves downward into the collecting barrel of the support frame 1 to be collected. When all the solid on the conical net 23 enters the rotating sleeve 19, the operator starts the telescopic end of the electric push rod 24 to move downward again. The sliding sleeve 22 and the conical net 23 move downward to reset at the same time, the sliding sleeve 22 moves downward to drive the fixed sleeve 27 and the three stirring members 21 to move downward, and the three telescopic rods 20 are reset. When the conical net 23 contacts the bottom of the desulfurization tower 2, the operator stops the electric push rod 24. In summary, by regularly discharging the solids precipitated from the solution, the solid content in the solution is reduced, and the precipitation rate of the solids is increased. At the same time, the conical net 23 will scrape the solids on the inner wall of the desulfurization tower 2 to avoid the solids from accumulating on the inner wall of the desulfurization tower 2 for a long time, which will make it difficult to clean up later.

[0038] In the process of the conical net 23 moving upward until the conical net 23 contacts the bottom of the desulfurization tower 2 again, a small amount of solid will precipitate from the solution, and the solid will accumulate between the bottom of the desulfurization tower 2 and the conical net 23 and cannot be discharged. Therefore, every time the conical net 23 moves upward, the small amount of solid under the conical net 23 needs to be discharged. The specific operation is as follows: In the initial state, the push ring 28 is located on the upper side of the annular groove 2201. In the process of the sliding sleeve 22 moving upward, the sliding sleeve 22 drives the push ring 28, the L-shaped rod 29 and the tension spring 30 to move upward. When the lower side of the annular groove 2201 is equal to the height of the lower surface of the desulfurization tower 2, the L-shaped rod 29 contacts the adjacent limit rod 31 and is limited by it and cannot move upward. The push ring 28 no longer moves upward. As the sliding sleeve 22 continues to move upward, the two tension springs 30 are stretched, the annular groove 2201 is connected with the desulfurization tower 2, and the solids on the lower side of the desulfurization tower 2 accumulate in the annular groove 2201. The state is as follows: Figure 7 As shown, the sliding sleeve 22 no longer moves upward. During the downward movement of the sliding sleeve 22, the two tension springs 30 are reset, and the two L-shaped rods 29 drive the push ring 28 to move upward relative to the sliding sleeve 22. When the upper side of the annular groove 2201 is lower than the bottom of the desulfurization tower 2, the annular groove 2201 is in a sealed environment. As the push ring 28 continues to move upward relative to the sliding sleeve 22, the pressure above the push ring 28 increases, and the one-way valve in the guide hole 2202 opens. The push ring 28 pushes the solution in the annular groove 2201 into the desulfurization tower 2 through the guide hole 2202. The solid in the annular groove 2201 is intercepted by the filter screen in the guide hole 2202 and cannot enter the desulfurization tower 2. When the ring When all the solution in the annular groove 2201 enters the desulfurization tower 2, the solid in the annular groove 2201 accumulates above the push ring 28 in the annular groove 2201. If there are too many solids in the annular groove 2201, the tension spring 30 will not be completely reset. As the sliding sleeve 22 continues to move downward, when the lower side of the annular groove 2201 is lower than the lower surface of the desulfurization tower 2, the solid in the annular groove 2201 is discharged from the annular groove 2201 into the collecting plate 26. At the same time, the tension spring 30 is reset to drive the push ring 28 to move upward through the two L-shaped rods 29 to squeeze out the solid in the annular groove 2201. The height of the inner ring surface of the push ring 28 is higher than the height of the outer ring surface, which is beneficial to the discharge of the solid in the annular groove 2201.

[0039] Although the present invention is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through this disclosure that various changes or modifications may be made to the present invention without departing from the principle and spirit of the present invention defined in the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, not to limit the present invention, but the scope of protection is limited by the content of the claims.

Claims

1. A dust removal and desulfurization device for coal-fired boiler flue gas, comprising a support frame (1), the support frame (1) being fixedly connected to a desulfurization tower (2), the top of the desulfurization tower (2) being provided with an air outlet (201), the bottom of the desulfurization tower (2) being provided with a discharge port (202), an annular shell (3) being fixedly connected to the outer side of the desulfurization tower (2), the desulfurization tower (2) being provided with a rectangular through hole communicating with the annular shell (3), the annular shell (3) being connected with an air inlet (4), a water distributor for spraying alkali solution being provided inside the desulfurization tower (2), wherein: It also comprises a rotating sleeve (5), the rotating sleeve (5) being rotatably connected to the annular shell (3), the rotating sleeve (5) being rotatably connected to the outer side of the desulfurization tower (2), the rotating sleeve (5) being fixedly connected to an annular net (6) located inside the annular shell (3), the desulfurization tower (2) being fixedly connected to a double-shaft motor (7), the output shaft of the double-shaft motor (7) being close to the air inlet (4) and the rotating sleeve (5) being transmitted via a first power assembly, a recoil mechanism being arranged on the side of the desulfurization tower (2) away from the air inlet (4), the recoil mechanism being used to recoil impurities accumulated on the annular net (6), and a diversion mechanism being arranged inside the desulfurization tower (2), the diversion mechanism being used to evenly disperse the flue gas entering the desulfurization tower (2); The diversion mechanism comprises a diversion shell (13), the diversion shell (13) is fixedly connected to the desulfurization tower (2), the diversion shell (13) is provided with a rectangular groove (1301) connected to the rectangular through hole of the desulfurization tower (2), the top of the diversion shell (13) is provided with exhaust ports (1302) evenly and evenly distributed, a sliding frame (14) is slidably connected to the diversion shell (13) through a support plate, the sliding frame (14) is fixedly connected to a pressure plate (15) slidably connected to the rectangular groove (1301), the pressure plate (15) is provided with a through hole, a second spring (16) is fixedly connected between the pressure plate (15) and the support plate in the diversion shell (13), the sliding frame (14) is fixedly connected to a blocking plate (17) distributed at an even distance, the blocking plate (17) is used to block the adjacent exhaust ports (1302), and the diversion shell (13) is provided with arc grooves (1303) distributed in an annular manner; A truncated cone-shaped protrusion is provided on the top of the flow splitting shell (13) at the exhaust port (1302); The desulfurization tower (2) is fixedly provided with shielding plates (18) distributed at equal intervals, the shielding plates (18) distributed at equal intervals are all located above the diversion shell (13), the cross-section of the shielding plates (18) is triangular, and the shielding plates (18) are used to shield the adjacent exhaust ports (1302).

2. The dust removal and desulfurization device for coal-fired boiler flue gas according to claim 1 is characterized in that: The recoil mechanism comprises a fixed shell (8), the fixed shell (8) being fixedly connected to a side of the desulfurization tower (2) away from the air inlet (4), a push plate (9) being slidably connected inside the fixed shell (8), a first spring (10) being fixedly connected between the push plate (9) and the fixed shell (8), the push plate (9) being provided with a through hole, a side of the fixed shell (8) away from the push plate (9) being provided with a through hole, the through hole of the push plate (9) and the fixed shell (8) being slidably connected to the fixed shell (8), ) are provided with a one-way valve, the desulfurization tower (2) is provided with an air storage chamber (203), the desulfurization tower (2) is provided with an air guide hole (204) connected to the air storage chamber (203), the air guide hole (204) is connected to the fixed shell (8), the side of the annular shell (3) away from the air inlet (4) is connected to the material guide shell (11), and the push plate (9) is provided with a driving component, and the driving component is used to drive the push plate (9) to move longitudinally.

3. The dust removal and desulfurization device for coal-fired boiler flue gas according to claim 2 is characterized in that: The driving component comprises a guide rod (12), the guide rod (12) being fixedly connected to the push plate (9), the guide rod (12) being slidably connected to the fixed shell (8), the outer annular surface of the rotating sleeve (5) being provided with a folding groove (501) slidably matched with the guide rod (12), the folding groove (501) being composed of a continuous vertical portion and an inclined portion.

4. The dust removal and desulfurization device for coal-fired boiler flue gas according to claim 1 is characterized in that: The invention also comprises a stirring mechanism, which is arranged on the support frame (1) and is used to stir the alkali solution in the desulfurization tower (2). The stirring mechanism comprises a rotating sleeve (19), which is rotatably connected to the support frame (1) via a supporting plate. The output shaft of the dual-axis motor (7) which is away from the air inlet (4) is transmitted to the rotating sleeve (19) via a second power assembly. The top of the rotating sleeve (19) is fixedly connected with telescopic rods (20) which are evenly spaced in the circumferential direction. The telescopic rods (20) are fixedly connected with a stirring member (21), which is composed of a vertical rod and horizontal plates which are evenly spaced. The desulfurization tower (2) is provided with a gathering mechanism for collecting solid matter therein.

5. The dust removal and desulfurization device for coal-fired boiler flue gas according to claim 4 is characterized in that: The material collecting mechanism comprises a sliding sleeve (22), the sliding sleeve (22) is slidably connected to the bottom of the desulfurization tower (2), the sliding sleeve (22) is slidably connected to the rotating sleeve (19), the sliding sleeve (22) is fixedly connected to a conical net (23) located at the bottom of the desulfurization tower (2), the desulfurization tower (2) is fixedly connected to an electric push rod (24), the telescopic end of the electric push rod (24) is fixedly connected to a fixed plate (25), and the side of the fixed plate (25) away from the telescopic end of the electric push rod (24) is fixedly connected to A collecting plate (26), the collecting plate (26) being fixedly connected to a side of the sliding sleeve (22) away from the desulfurization tower (2), the sliding sleeve (22) being rotatably connected to a fixed sleeve (27) fixedly connected to the stirring member (21) at circumferentially equal intervals, the rotating sleeve (19) being provided with feed troughs (1901) distributed at circumferentially equal intervals, the support frame (1) being fixedly connected to a collecting barrel located directly below the rotating sleeve (19), and the sliding sleeve (22) being provided with a collecting component for collecting solid matter in the desulfurization tower (2).

6. The dust removal and desulfurization device for coal-fired boiler flue gas according to claim 5 is characterized in that: The collecting assembly comprises a push ring (28), the sliding sleeve (22) is provided with an annular groove (2201), the push ring (28) is slidably connected in the annular groove (2201), the push ring (28) is fixedly connected with symmetrically distributed L-shaped rods (29) which are slidably connected to the sliding sleeve (22), a tension spring (30) is fixedly connected between the L-shaped rods (29) and the sliding sleeve (22), the desulfurization tower (2) is fixedly connected with symmetrically distributed limiting rods (31) which are limitedly matched with adjacent L-shaped rods (29), the sliding sleeve (22) is provided with a guide hole (2202) which is connected to the annular groove (2201), and a one-way valve and a filter are arranged in the guide hole (2202).

7. The dust removal and desulfurization device for coal-fired boiler flue gas according to claim 6 is characterized in that: The height of the inner ring surface of the push ring (28) is higher than the height of the outer ring surface.

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