Circulating washing and purifying treatment device for waste gas of environment-friendly boiler

Abstract

The invention discloses an environment-friendly boiler waste gas circulating washing and purifying treatment device which comprises a spray tower assembly, the spray tower assembly comprises an ash bin, the ash bin is fixedly connected with a spray tower body and a dust removal part through a rack arranged at the top of the ash bin, and the dust removal part comprises a first machine shell, a dust removal piece and a second machine shell; the invention relates to the technical field of kiln waste gas treatment. The circulating washing and purifying treatment device for the environment-friendly boiler waste gas can effectively solve the problems that in the prior art, when dust on the surfaces of filter bags of a bag type dust collector is continuously increased, a program control instrument starts to work, pulse valves are opened one by one, compressed air is sprayed out through a nozzle to clean the filter bags, the filter bags are suddenly expanded, and the dust on the surfaces of the filter bags cannot be removed under the action of reverse airflow. The problems that dust on the surface of a cloth bag is rapidly separated from a filter bag, falls into an ash bin and is discharged by an ash discharge valve, reverse blowing is needed for removal of the dust on the surface of the filter bag, the bag type dust collector is in a shutdown state at the moment, and continuous filtration of the flue gas of the kiln is delayed are solved.

Description

Technical Field

[0001] The invention relates to the technical field of kiln waste gas treatment, and in particular to a circulating washing and purification treatment device for environmentally friendly boiler waste gas. Background Art

[0002] The dust, sulfur and nitrogen oxides contained in the kiln flue gas are all substances that pollute the atmosphere. If not purified, their emission indicators may reach several to dozens of times the indicators stipulated by environmental protection regulations. Measures to control the emission of these substances include pre-combustion treatment, improved combustion technology, dust removal, desulfurization and denitrification.

[0003] Kiln flue gas is generally dedusted by bag filters. The dusty gas is first filtered through the filter bag, and the dust remains on the surface of the bag. Then the sulfide is removed by the desulfurization tower, and the chemically stable pollutant gas is removed by plasma. In the above-mentioned bag filter, when the dust on the surface of the filter bag continues to increase, the program-controlled instrument starts to work, opens the pulse valves one by one, and the compressed air is sprayed through the nozzle to clean the filter bag, causing the filter bag to expand suddenly. Under the action of the reverse airflow, the dust on the surface of the bag is quickly separated from the filter bag, falls into the ash bin, and is discharged by the ash discharge valve. Since the removal of dust on the surface of the filter bag requires reverse blowing, the bag filter is in a shutdown state at this time, which delays the continuous filtration of the kiln flue gas and cannot achieve cyclic uninterrupted filtration. Summary of the invention

[0004] Technical issues solved In view of the above-mentioned shortcomings of the prior art, the present invention provides an environmentally friendly boiler exhaust gas circulating washing and purification treatment device, which can effectively solve the problem in the prior art that when the dust on the surface of the filter bag of the bag collector continues to increase, the programmable instrument starts to work and opens the pulse valves one by one to allow compressed air to spray out through the nozzle to clean the filter bag, causing the filter bag to suddenly expand. Under the action of the reverse airflow, the dust on the surface of the bag is quickly separated from the filter bag, falls into the ash bin, and is discharged by the ash discharge valve. Since the removal of dust on the surface of the filter bag requires reverse blowing, the bag collector is in a shutdown state at this time, delaying the continuous filtration of the kiln flue gas.

[0005] Technical Solution

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a circulating washing and purification treatment device for environmentally friendly boiler exhaust gas, comprising: A spray tower assembly, the spray tower assembly comprising an ash bin, the ash bin being fixedly connected to the spray tower body via a frame arranged on the top thereof; The dust removal part includes a first housing, a dust removal member and a second housing, the bottom of the first housing is fixedly connected to the top of the ash bin, the bottom of the second housing is fixedly connected to the top of the ash bin, the first housing and the second housing are symmetrically distributed with the dust removal member as the center, the end faces of the dust removal member are rotatably connected to the outer surfaces of the first housing and the second housing respectively, and the second housing is provided with an outlet valve connected to the air inlet of the spray tower body on the side away from the first housing; Wherein, the outer surface of the second housing is provided with a driving unit connected to the top of the ash bin, and the driving unit is internally connected with a gear rod which can be used to drive the dust removal component to rotate.

[0007] Furthermore, a limiting block is fixedly connected to the inner wall of the first housing, a clamping hole is provided inside the limiting block, and an air intake valve connected to the inside of the clamping hole is provided on the side of the first housing away from the second housing.

[0008] Furthermore, an ash discharge hole communicating with the interior of the ash bin is provided inside the first casing, a first slide groove is provided on a side of the first casing close to the second casing, and a second slide groove is provided on an inner wall of the second casing.

[0009] Furthermore, the dust removal component includes a cylinder, the end faces of which are rotatably connected to the first slide groove and the inner wall of the second housing respectively, and the circumferential outer surface of the cylinder is fixedly connected to a gear ring meshing with the gear rod.

[0010] Furthermore, a partition plate is fixedly connected to the inner wall of the cylinder, a hollow cylinder is fixedly connected inside the partition plate, the hollow cylinder is slidably connected to a movable ring plate via a built-in groove provided inside the hollow cylinder, a movable ball is fixedly connected inside the movable ring plate, and a bent plate connected to the inside of the hollow cylinder is provided on the outer surface of the movable ball.

[0011] Furthermore, a dust removal channel is provided inside the movable ball, and a filter plate is fixedly connected to one end of the dust removal channel close to the second housing. An air hole is provided inside the hollow cylinder, and the air hole is located in the space surrounded by the partition plate and the second housing. The movable ring plate is fixedly connected to a light rod that slides with the inside of the hollow cylinder on the side away from the bent plate.

[0012] Furthermore, the end of the hollow tube away from the first housing is sealed and rotatably fitted with the inner wall of the second housing, the end of the hollow tube away from the second housing does not contact the outer surface of the limit block, and the side of the moving ball away from the second housing is fitted with the outer surface of the limit block.

[0013] Beneficial Effects

[0014] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention is provided with a dust removal component, a driving unit and a gear rod. The servo motor inside the driving unit is started to drive the gear rod to rotate rapidly, and the meshing transmission dust removal component as a whole rotates around the inner wall of the first slide groove and the second slide groove. The cylinder synchronously drives the moving ring plate, the moving ball and the curved plate to rotate. When the moving ball starts to rotate, it is subjected to the thrust of the snap-in hole, and the moving ball slides a short distance. At this time, the moving ball is separated from the snap-in hole and transferred to the outer surface of the limit block. Another group of moving balls is quickly snapped into the snap-in hole to realize the rapid switching of the filter plate and the dust removal channel, so that the smoke can be filtered uninterruptedly. As can be seen from the above, due to the extremely short switching time, only a small amount of smoke will leak from the snap-in hole into the space surrounded by the first housing and the dust removal component. The sudden release of this smoke can be used to quickly discharge the dust in the ash discharge hole into the ash bin. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the three-dimensional combination of the first housing, the dust removal component and the second housing according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the structure of the first housing, the dust removal component and the second housing being three-dimensionally separated in an embodiment of the present invention; Figure 4 It is a structural schematic diagram of a three-dimensional partial cross-section of a first housing according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the structure of the first housing in a multi-angle stereoscopic manner according to an embodiment of the present invention; Figure 6 is a schematic structural diagram of a three-dimensional partial cross-section of a second housing according to an embodiment of the present invention; Figure 7 It is a schematic diagram of the multi-angle three-dimensional structure of the second housing of an embodiment of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of a dust removal component according to an embodiment of the present invention; Fig. 9 For the embodiment of the present invention Figure 8 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0017] The numbers in the figure represent respectively: 1. spray tower assembly; 11. ash bin; 12. frame; 13. spray tower body; 2. dust removal part; 21. first housing; 211. limit block; 212. snap-on hole; 213. air inlet valve; 214. ash discharge hole; 215. first slide; 22. dust removal part; 221. cylinder; 222. gear ring; 223. partition plate; 224. hollow cylinder; 2241. built-in groove; 2242. moving ring plate; 2243. moving ball; 2244. bent plate; 2245. dust removal channel; 2246. filter plate; 2247. air vent; 2248. light rod; 23. second housing; 231. air outlet valve; 232. second slide; 24. drive unit; 25. gear rod. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0019] The present invention will be further described below in conjunction with the embodiments.

[0020] Example

[0021] See also Figure 1-Figure 9 The present invention provides a technical solution: a circulating washing and purification treatment device for environmentally friendly boiler exhaust gas, characterized in that it includes: The spray tower assembly 1 includes an ash bin 11, and the ash bin 11 is fixedly connected to a spray tower body 13 via a frame 12 arranged on the top thereof; The dust removal part 2 includes a first housing 21, a dust removal member 22 and a second housing 23. The bottom of the first housing 21 is fixedly connected to the top of the ash bin 11, and the bottom of the second housing 23 is fixedly connected to the top of the ash bin 11. The first housing 21 and the second housing 23 are symmetrically distributed with the dust removal member 22 as the center. The end faces of the dust removal member 22 are rotatably connected to the outer surfaces of the first housing 21 and the second housing 23 respectively. The second housing 23 is provided with an outlet valve 231 connected to the air inlet of the spray tower body 13 on the side away from the first housing 21; The outer surface of the second housing 23 is provided with a driving unit 24 connected to the top of the ash bin 11 , and the driving unit 24 is internally connected with a gear rod 25 that can be used to drive the dust removal component 22 to rotate.

[0022] The inner wall of the first housing 21 is fixedly connected to a limit block 211 , a clamping hole 212 is provided inside the limit block 211 , and an intake valve 213 connected to the inside of the clamping hole 212 is provided on the side of the first housing 21 away from the second housing 23 .

[0023] An ash discharge hole 214 communicating with the ash bin 11 is formed inside the first housing 21 . A first slide groove 215 is formed on one side of the first housing 21 close to the second housing 23 . A second slide groove 232 is formed on the inner wall of the second housing 23 .

[0024] The dust removal member 22 includes a cylinder 221 , the end faces of which are rotatably connected to the first slide groove 215 and the inner wall of the second housing 23 , respectively, and a gear ring 222 meshingly connected to the gear rod 25 is fixedly connected to the circumferential outer surface of the cylinder 221 .

[0025] A partition plate 223 is fixedly connected to the inner wall of the cylinder 221, and a hollow cylinder 224 is fixedly connected inside the partition plate 223. The hollow cylinder 224 is slidably connected to a movable ring plate 2242 via a built-in groove 2241 provided therein. A movable ball 2243 is fixedly connected inside the movable ring plate 2242, and a bent plate 2244 connected to the inside of the hollow cylinder 224 is provided on the outer surface of the movable ball 2243.

[0026] A dust removal channel 2245 is provided inside the moving ball 2243, and a filter plate 2246 is fixedly connected to the dust removal channel 2245 at one end close to the second housing 23. An air hole 2247 is provided inside the hollow cylinder 224, and the air hole 2247 is located in the space enclosed by the partition plate 223 and the second housing 23. The moving ring plate 2242 is fixedly connected to a light rod 2248 that slides with the inside of the hollow cylinder 224 on the side away from the bent plate 2244. This can not only ensure the smooth short-distance movement of the moving ball 2243, but also prevent the moving ball 2243 from rotating.

[0027] The end of the hollow cylinder 224 away from the first housing 21 is sealed and rotatably fitted with the inner wall of the second housing 23, and the end of the hollow cylinder 224 away from the second housing 23 does not contact the outer surface of the limit block 211. The side of the moving ball 2243 away from the second housing 23 is fitted with the outer surface of the limit block 211. The limit block 211 mainly plays a limiting role for the moving ball 2243, helping the moving ball 2243 to quickly slide into or out of the clamping hole 212. Secondly, only 1 / 3 of the moving ball 2243 is fitted with the limit block 211, which is convenient for quickly removing dust in the dust removal channel 2245.

[0028] refer to Figure 1-9Kiln flue gas is generally dedusted by bag filters. The dust-laden gas is first filtered through filter bags, and the dust remains on the surface of the bags. The sulfides are then removed by a desulfurization tower, and then the chemically stable pollutant gases are removed by plasma. For the above-mentioned bag filter, when the dust on the surface of the filter bags continues to increase, the program-controlled instrument starts to work, opens the pulse valves one by one, and allows compressed air to be sprayed out through the nozzles to clean the filter bags, causing the filter bags to suddenly expand. Under the action of the reverse airflow, the dust on the surface of the bags is quickly separated from the filter bags, falls into the ash bin, and is discharged by the ash discharge valve. Since the removal of dust on the surface of the filter bags requires reverse blowing, the bag filter is in a shutdown state at this time, which delays the continuous filtration of the kiln flue gas and cannot achieve cyclic uninterrupted filtration; In order to overcome the above-mentioned defects, the present invention designs an environmentally friendly boiler exhaust gas circulating washing and purification treatment device. First, the spray tower body 13 can remove the sulfide in the kiln flue gas. Before this, the kiln flue gas needs to pass through the dust removal part 2 for dust removal.

[0029] Initially, the moving ball 2243 on the dust removal member 22 is subjected to the elastic force of the bent plate 2244, driving the moving ring plate 2242 to fit tightly against the inner wall of the built-in groove 2241 (the above only applies to the moving ball 2243 corresponding to the snap-in hole 212, and the other moving balls 2243 are forced to fit tightly against the outer surface of the limit block 211), and at the same time, the moving ball 2243 is tightly fitted against the outer end of the snap-in hole 212 away from the bent plate 2244. At this time, the dust removal channel 2245 is connected to the inside of the snap-in hole 212, and the port of the dust removal channel 2245 is sealed by a sealing ring. When the dust-containing flue gas passes through the air inlet valve 213, it enters the dust removal channel 2245 through the snap-in hole 212, and then enters the space enclosed by the hollow cylinder 224 and the second housing 23, and the filter plate 2246 can filter the dust-containing flue gas and block the dust in the dust removal channel 2245. Since there are six groups of hollow cylinders 224, which are equidistantly distributed and not interconnected, and at the same time, the end of the hollow cylinder 224 away from the first casing 21 is sealed and rotatably fitted with the inner wall of the second casing 23, the hollow cylinder 224 containing smoke can discharge the filtered gas into the spray tower assembly 1 through the outlet valve 231.

[0030] Due to the continuous filtering of the filter plate 2246, the amount of dust accumulated on the outer surface of the filter plate 2246 and the inside of the dust removal channel 2245 increases. The present invention can freely switch to other filter plates 2246 and dust removal channels 2245 without stopping the machine, and they do not interfere with each other. At the same time, the dust on the filter plate 2246 and the inside of the dust removal channel 2245 can be automatically removed synchronously, eliminating the trouble of independent removal and realizing cyclic uninterrupted filtration (different from the traditional bag dust collector which needs to be shut down and then blown in the reverse direction to remove dust on the surface of the filter bag).

[0031] Specifically, the servo motor inside the driving unit 24 is started to drive the gear rod 25 to rotate rapidly, and the meshing transmission dust removal member 22 as a whole rotates 60 degrees around the inner walls of the first slide groove 215 and the second slide groove 232 (the switching speed is fast and accurate through PLC control), and the cylinder 221 synchronously drives the moving ring plate 2242, the moving ball 2243, and the bent plate 2244 to rotate. When the moving ball 2243 starts to rotate (containing dust), under the thrust of the clamping hole 212, the moving ball 2243 slides a short distance (the moving ring plate 2242 slides a short distance along the inner wall of the built-in groove 2241, and the bent plate 2244 undergoes elastic deformation). At this time, the moving ball 2243 disengages from the clamping hole 212 and transfers to the outer surface of the limit block 211, and another group of moving balls 2243 quickly snaps into the clamping hole 212, thereby realizing the rapid switching of the filter plate 2246 and the dust removal channel 2245, thereby continuously filtering the smoke. From the above, it can be seen that since the switching time is extremely short, only a small amount of smoke will leak from the snap-in hole 212 into the space surrounded by the first housing 21 and the dust removal component 22. The sudden release of this smoke can allow the dust in the ash discharge hole 214 to be quickly discharged into the ash bin 11.

[0032] When the moving ball 2243 is switched, the dust-containing flue gas flows into the new dust removal channel 2245 and into the space surrounded by the new hollow cylinder 224 and the second housing 23. The filtered gas is discharged into the spray tower assembly 1 through the outlet valve 231. A very small amount of filtered gas flows into the space surrounded by the partition plate 223, the hollow cylinder 224 and the second housing 23 through the air hole 2247. When the internal pressure continues to increase, it flows into the corresponding dust removal channel 2245 through the remaining air holes 2247, and the dust inside the filter plate 2246 and the dust removal channel 2245 is automatically removed (the dust removal time is quite long, equivalent to 6 times the filtering time of each group of filter plates 2246 alone). The dust accompanies the flue gas and flows into the space surrounded by the first housing 21, the limit block 211, the cylinder 221 and the partition plate 223, and flows into the ash discharge hole 214 and falls into the ash bin 11, thereby realizing the cyclic and continuous filtration of the kiln flue gas.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circulating washing and purification treatment device for environmentally friendly boiler exhaust gas, characterized in that: include: A spray tower assembly (1), the spray tower assembly (1) comprising an ash bin (11), the ash bin (11) being fixedly connected to a spray tower body (13) via a frame (12) arranged on the top thereof; A dust removal section (2), the dust removal section (2) comprising a first housing (21), a dust removal member (22) and a second housing (23), the bottom of the first housing (21) being fixedly connected to the top of the ash bin (11), the bottom of the second housing (23) being fixedly connected to the top of the ash bin (11), the first housing (21) and the second housing (23) being symmetrically distributed with the dust removal member (22) as the center, the end surface of the dust removal member (22) being rotatably connected to the outer surfaces of the first housing (21) and the second housing (23), respectively, and the second housing (23) being provided with an outlet valve (231) connected to an air inlet of a spray tower body (13) on a side of the second housing (23) away from the first housing (21); The outer surface of the second housing (23) is provided with a driving unit (24) connected to the top of the ash bin (11), and the driving unit (24) is internally transmission-connected with a gear rod (25) that can be used to drive the dust removal component (22) to rotate.

2. The circulating washing and purification treatment device for environmentally friendly boiler exhaust gas according to claim 1 is characterized by: The inner wall of the first housing (21) is fixedly connected to a limit block (211), a clamping hole (212) is provided inside the limit block (211), and an air intake valve (213) connected to the inside of the clamping hole (212) is provided on a side of the first housing (21) away from the second housing (23).

3. The circulating washing and purification treatment device for environmentally friendly boiler exhaust gas according to claim 1 is characterized by: An ash discharge hole (214) communicating with the interior of the ash bin (11) is provided inside the first housing (21), a first slide groove (215) is provided on a side of the first housing (21) close to the second housing (23), and a second slide groove (232) is provided on an inner wall of the second housing (23).

4. The circulating washing and purification treatment device for environmentally friendly boiler exhaust gas according to claim 2 is characterized by: The dust removal member (22) comprises a cylinder (221), the end faces of which are rotatably connected to the first slide groove (215) and the inner wall of the second housing (23), respectively, and a toothed ring (222) meshingly connected to the toothed rod (25) is fixedly connected to the circumferential outer surface of the cylinder (221).

5. The circulating washing and purification treatment device for environmentally friendly boiler exhaust gas according to claim 4 is characterized by: A partition plate (223) is fixedly connected to the inner wall of the cylinder (221); a hollow cylinder (224) is fixedly connected to the interior of the partition plate (223); the hollow cylinder (224) is slidably connected to a movable ring plate (2242) via a built-in groove (2241) provided therein; a movable ball (2243) is fixedly connected to the interior of the movable ring plate (2242); and a bent plate (2244) connected to the interior of the hollow cylinder (224) is provided on the outer surface of the movable ball (2243).

6. The circulating washing and purification treatment device for environmentally friendly boiler exhaust gas according to claim 5 is characterized by: A dust removal passage (2245) is provided inside the movable ball (2243), and a filter plate (2246) is fixedly connected to one end of the dust removal passage (2245) close to the second housing (23). An air hole (2247) is provided inside the hollow cylinder (224), and the air hole (2247) is located in a space enclosed by the partition plate (223) and the second housing (23). A light rod (2248) that slides inside the hollow cylinder (224) is fixedly connected to the side of the movable ring plate (2242) away from the bent plate (2244).

7. The circulating washing and purification treatment device for environmentally friendly boiler exhaust gas according to claim 5 is characterized by: The end of the hollow cylinder (224) away from the first housing (21) is in sealing rotational contact with the inner wall of the second housing (23), the end of the hollow cylinder (224) away from the second housing (23) is not in contact with the outer surface of the limit block (211), and the side of the movable ball (2243) away from the second housing (23) is in contact with the outer surface of the limit block (211).

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