VOCs emission environmental protection treatment equipment for internal floating roof storage tank

Abstract

The application relates to an environmental protection treatment equipment for VOCs emission of an inner floating roof storage tank, which comprises a storage tank, an inner floating disc, a fixed plate, sealing cloth and an adsorption box. The fixed plate is arranged at the top of the inner wall of the storage tank. The inner floating disc is connected with the fixed plate through the sealing cloth. The adsorption box is arranged at the top of the inner floating disc. One end of a suction pipe is communicated with the adsorption box, and the other end of the suction pipe extends into the storage tank through the inner floating disc. An exhaust pipe is arranged at the top of the storage tank. One end of a hose is communicated with the top of the adsorption box, and the other end of the hose is communicated with the lower end of the exhaust pipe. The suction pump can suck the VOCs in the storage tank. After most of the organic matters and impurities are adsorbed by the adsorption box, the VOCs are discharged into the surrounding air, so that the harm to the surrounding environment is reduced.

Description

Technical Field

[0001] This invention belongs to the field of VOCs treatment technology, specifically relating to an environmental protection treatment device for VOCs emissions from an internal floating roof storage tank. Background Technology

[0002] Internal floating roof tanks are common equipment for storing liquid chemicals and are widely used in industries such as petroleum and chemicals. However, traditional internal floating roof tanks present certain emission problems during VOCs treatment. VOCs are an abbreviation for volatile organic compounds, which have high volatility and toxicity, posing serious threats to the environment and human health. Therefore, how to effectively treat and control VOCs emissions has become an important issue in the current environmental protection field.

[0003] Patent CN115447916A discloses an environmental protection device for VOCs emission control in an internal floating roof storage tank. The device includes a storage tank and an internal floating roof, a sealing device, and a pressure balancing device located inside the tank. The sealing device includes a sealing cloth, a sealing cloth collar, and a limiting rod. The upper end of the limiting rod is connected to a suspension platform located on the upper part of the inner walls on both sides of the storage tank; the lower end of the limiting rod is connected to the bottom wall of the storage tank. A pressure balancing device is located at the center of the upper end of the internal floating roof to regulate the air pressure in the sealed space within the tank wall caused by the internal floating roof's ascent or descent. The sealing cloth is connected to the suspension platform and the internal floating roof to form a sealed space. The sealing cloth collar is connected to the limiting collar, allowing the sealing cloth to move synchronously up and down with the internal floating roof, reducing sealing loss around the tank and tank wall loss, eliminating VOCs loss from the storage tank, and achieving zero VOCs emissions from the storage tank.

[0004] However, the above-mentioned patent has the following shortcomings in actual use: the pressure of VOCs in the storage tank is too high, which leads to the failure of the seal and makes it easy to leak into the surrounding environment. VOCs have high volatility and toxicity, which cause serious harm to the environment and human health. Summary of the Invention

[0005] Therefore, the present invention aims to solve the problem in the prior art where excessive VOCs pressure in the storage tank leads to seal failure and easy leakage into the surrounding environment.

[0006] Therefore, the technical solution adopted is an environmental protection treatment device for VOCs emissions from an internal floating roof storage tank according to the present invention, comprising: a storage tank, an internal floating roof, a fixing plate, a sealing cloth, and an adsorption box. A fixing plate is provided at the top of the inner wall of the storage tank, and the internal floating roof is connected to the fixing plate through the sealing cloth. An adsorption box is provided at the top of the internal floating roof. One end of the suction pipe is connected to the adsorption box, and the other end of the suction pipe extends through the internal floating roof into the storage tank. An exhaust pipe is provided at the top of the storage tank, and one end of the hose is connected to the top of the adsorption box, and the other end of the hose is connected to the lower end of the exhaust pipe.

[0007] Preferably, a suction pump is installed on the suction pipe.

[0008] Preferably, a gas concentration sensor is installed at the bottom of the inner floating plate, and a controller is installed inside the adsorption box. The gas concentration sensor is connected to the controller, and the controller is connected to the suction pump.

[0009] Preferably, the adsorption box has a horizontal channel with a first opening at the top and a second opening at the bottom. An air inlet chamber is located at the bottom of the channel, and an exhaust chamber is located at the top. The first opening communicates with the exhaust chamber, and the second opening communicates with the air inlet chamber. The bottom of the air inlet chamber communicates with a suction pipe, and the top of the exhaust chamber communicates with a flexible hose. A groove is located at the top of the channel, communicating with the channel and situated to the right of the exhaust chamber. A through hole is located at the top of the groove, and multiple adsorption plates containing activated carbon are arranged within it. A push plate is positioned above the groove, connected to the channel by a spring. One end of a sliding rod is connected to the push plate, and the other end extends through the through hole into the groove and connects to a pressure plate. A horizontal first cylinder is positioned on the inner wall of the adsorption box, with its piston rod extending to the right end of the channel and connecting to a push rod.

[0010] Preferably, elastic limiting blocks are respectively provided on the inner wall of the channel on both sides of the second opening.

[0011] Preferably, a storage box is provided on the left side of the air intake chamber.

[0012] Preferably, an inspection port is provided on the outer wall of the adsorption box, and a cover plate is provided on the inspection port. The cover plate is connected to the adsorption box by screws.

[0013] Preferably, the device further includes a cleaning device comprising: a rotating shaft, a first gear, a rack, a second cylinder, and an internal gear. The rotating shaft passes through and is rotatably connected to the inner floating disk. The upper end of the rotating shaft extends into the adsorption box and is coaxially connected to the first gear. The first gear meshes with the rack in a horizontal direction. A second cylinder in a horizontal direction is provided on the inner wall of the adsorption box. The piston rod of the second cylinder is connected to the rack. An internal gear is provided below the inner floating disk. The internal gear is connected to the bottom end of the inner floating disk via a connecting rod. The lower end of the rotating shaft is connected to one end of a first crank. The other end of the first crank is rotatably connected to a second gear, which meshes with the internal gear. One end of the second crank is connected to the center of the bottom end of the second gear. The other end of the second crank is connected to a detonator. A slide rail extending along the length direction is provided on the first crank. A slide bar is slidably connected to the slide rail. One end of the slide bar is vertically connected to a slide groove. The detonator can slide within the slide groove. One end of a connecting column is connected to the slide bar. The other end of the connecting column is coaxially connected to a cylinder. Brush bristles are provided on the outer wall of the cylinder.

[0014] The technical solution of this invention has the following advantages:

[0015] 1. This invention provides an environmental protection device for VOCs emission treatment in an internal floating roof storage tank, comprising: a storage tank, an internal floating roof, a fixing plate, a sealing cloth, and an adsorption box. A fixing plate is installed at the top of the inner wall of the storage tank. The internal floating roof is connected to the fixing plate via the sealing cloth. An adsorption box is installed at the top of the internal floating roof. One end of a suction pipe is connected to the adsorption box, and the other end of the suction pipe extends through the internal floating roof into the storage tank. An exhaust pipe is installed at the top of the storage tank. One end of a flexible hose is connected to the top of the adsorption box, and the other end of the flexible hose is connected to the lower end of the exhaust pipe. The suction pump can draw VOCs from the storage tank. After most of the organic matter and impurities are adsorbed by the adsorption box, the VOCs are released into the surrounding air, reducing harm to the surrounding environment.

[0016] 2. The adsorption plate in this invention can adsorb most organic matter and impurities. When the adsorption capacity of the adsorption plate deteriorates, the first cylinder is activated, which drives the push rod to reciprocate once. The push rod pushes the adsorption plate at the bottom of the groove to the left, replacing the adsorption plate between the first opening and the second opening. After the push rod moves to the right, the pressure plate moves downward under the elastic force of the spring, replenishing the adsorption plate in the groove, thus realizing the automatic replacement of the adsorption plate.

[0017] 3. The cleaning device in this invention drives the cylinder and the brush to rotate around the axis of the rotating shaft, while also moving radially back and forth along the internal gear and moving up and down with the internal floating plate, cleaning the inner wall and bottom wall of the storage tank, preventing corrosion and damage to the inner wall of the storage tank, and affecting the service life of the storage tank.

[0018] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0019] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the adsorption box in this invention;

[0023] Figure 3 This is a schematic diagram of the structure of the channel and groove in this invention;

[0024] Figure 4This is a schematic diagram of the structure of the adsorption disk in this invention;

[0025] Figure 5 This is a schematic diagram of the cleaning device in this invention;

[0026] Figure 6 This is a bottom view of the cleaning device in this invention;

[0027] Among them, 1-storage tank, 2-inner floating plate, 3-fixed plate, 4-sealing cloth, 5-adsorption box, 6-suction pipe, 7-exhaust pipe, 8-hose, 9-suction pump, 10-gas concentration sensor, 11-controller, 12-channel, 13-first opening, 14-second opening, 15-inlet chamber, 16-exhaust chamber, 17-groove body, 18-adsorption plate, 19-push plate, 20-spring, 21-slide rod, 22-pressure plate, 23-through hole 24-First cylinder, 25-Push rod, 26-Elastic limit block, 27-Storage box, 28-Inspection port, 29-Cover plate, 30-Shaft, 31-First gear, 32-Rack, 33-Second cylinder, 34-Internal gear, 35-Connecting rod, 36-First crank, 37-Second gear, 38-Second crank, 39-Pulley, 40-Slide rail, 41-Slide bar, 42-Slide groove body, 43-Connecting column, 44-Cylinder, 45-Bristles. Detailed Implementation

[0028] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0029] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to that other component.

[0030] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] This invention provides an environmental protection device for VOCs emission treatment of internal floating roof tanks, such as... Figure 1 As shown, the system includes: a storage tank 1, an inner floating plate 2, a fixing plate 3, a sealing cloth 4, and an adsorption box 5. The fixing plate 3 is located at the top of the inner wall of the storage tank 1. The inner floating plate 2 is connected to the fixing plate 3 via the sealing cloth 4. The adsorption box 5 is located at the top of the inner floating plate 2. One end of a suction pipe 6 is connected to the adsorption box 5, and the other end of the suction pipe 6 extends through the inner floating plate 2 into the storage tank 1. An exhaust pipe 7 is located at the top of the storage tank 1. One end of a flexible hose 8 is connected to the top of the adsorption box 5, and the other end of the flexible hose 8 is connected to the lower end of the exhaust pipe 7. A suction pump 9 is installed on the suction pipe 6. A gas concentration sensor 10 is located at the bottom of the inner floating plate 2. A controller 11 is located inside the adsorption box 5. The gas concentration sensor 10 is connected to the controller 11, and the controller 11 is connected to the suction pump 9.

[0033] The working principle and beneficial technical effects of the above technical solution: The gas concentration sensor 10 can detect the concentration of VOCs in the storage tank 1. When the concentration exceeds the warning value, the controller 11 will start the suction pump 9 to suck up the VOCs in the storage tank 1. After most of the organic matter and impurities are adsorbed by the adsorption box 5, they are discharged into the surrounding air, reducing the harm to the surrounding environment.

[0034] In one embodiment, such as Figure 2-4 As shown, the adsorption box 5 has a horizontal channel 12. The upper end of the channel 12 has a first opening 13, and the bottom end has a second opening 14. An air inlet chamber 15 is located at the bottom of the channel 12, and an exhaust chamber 16 is located at the top. The first opening 13 communicates with the exhaust chamber 16, and the second opening 14 communicates with the air inlet chamber 15. The bottom of the air inlet chamber 15 is connected to the suction pipe 6, and the top of the exhaust chamber 16 is connected to the flexible hose 8. A groove 17 is located at the top of the channel 12, communicating with the channel 12. The groove 17 is located at the exhaust... On the right side of the air chamber 16, a through hole 23 is provided at the top of the groove body 17. Multiple adsorption plates 18 are provided inside the groove body 17, and activated carbon is provided inside the adsorption plates 18. A push plate 19 is provided above the groove body 17. The push plate 19 is connected to the channel 12 by a spring 20. One end of the slide rod 21 is connected to the push plate 19, and the other end of the slide rod 21 extends through the through hole 23 into the groove body 17 and is connected to the pressure plate 22. A first cylinder 24 in a horizontal direction is provided on the inner wall of the adsorption box 5. The piston rod of the first cylinder 24 extends into the right end of the channel 12 and is connected to the push rod 25.

[0035] The working principle and beneficial technical effects of the above technical solution are as follows: The adsorption plate 18 can adsorb most organic matter and impurities. When the adsorption capacity of the adsorption plate deteriorates, the first cylinder 24 is activated, which drives the push rod 25 to reciprocate once. The push rod 25 pushes the adsorption plate 18 at the bottom of the groove 17 to the left, replacing the adsorption plate 18 between the first opening 13 and the second opening 14. After the push rod 25 moves to the right, under the elastic force of the spring 20, the pressure plate 22 moves downward, replenishing the adsorption plate 18 in the groove 17, thereby realizing the automatic replacement of the adsorption plate 18.

[0036] In one embodiment, such as Figure 2 As shown, elastic limiting blocks 26 are respectively provided on both sides of the second opening 14 on the inner wall of the channel 12 for securing the adsorption tray 18. A storage box 27 is provided on the left side of the air inlet chamber 15 for storing used adsorption trays 18 for centralized processing. An inspection port 28 is provided on the outer wall of the adsorption box 5, and a cover plate 29 is provided on the inspection port 28. The cover plate 29 is connected to the adsorption box 5 by screws, which facilitates opening the cover plate 29 to repair the components inside the adsorption box 5.

[0037] In one embodiment, such as Figure 5-6 As shown, it also includes a cleaning device, which includes: a rotating shaft 30, a first gear 31, a rack 32, a second cylinder 33, and an internal gear 34. The rotating shaft 30 passes through the inner floating plate 2 and is rotatably connected to the inner floating plate 2. The upper end of the rotating shaft 30 extends into the adsorption box 5 and is coaxially connected to the first gear 31. The first gear 31 meshes with the horizontally oriented rack 32. A horizontally oriented second cylinder 33 is provided on the inner wall of the adsorption box 5. The piston rod of the second cylinder 33 is connected to the rack 32. An internal gear 34 is provided below the inner floating plate 2. The internal gear 34 is connected to the bottom end of the inner floating plate 2 through a connecting rod 35. The lower end of the rotating shaft 30 is connected to the first gear 31. One end of the crank 36 is connected to a second gear 37, which is rotatably connected to the other end of the first crank 36. The second gear 37 meshes with the internal gear 34. One end of the second crank 38 is connected to the center of the bottom of the second gear 37, and the other end of the second crank 38 is connected to the shift post 39. A slide rail 40 extending along the length direction is provided on the first crank 36. A slide bar 41 is slidably connected to the slide rail 40. One end of the slide bar 41 is vertically connected to a slide groove 42. The shift post 39 can slide in the slide groove 42. One end of the connecting post 43 is connected to the slide bar 41, and the other end of the connecting post 43 is coaxially connected to the cylinder 44. Brush bristles 45 are provided on the outer wall of the cylinder 44.

[0038] The working principle and beneficial technical effects of the above technical solution are as follows: When the inner wall and bottom wall of the storage tank need to be cleaned, the second cylinder 33 is activated, driving the rack 32 to move back and forth. The rack 32 meshes with the first gear 31, driving the first gear 31 to rotate alternately in both directions. The first gear 31 drives the rotating shaft 30 and the first crank 36 to rotate alternately in both directions. While the first crank 36 drives the second gear 37 to rotate around the axis of the rotating shaft 30, the second gear 37 meshes with the internal gear 34. The second gear 37 rotates around the axis of the first gear 30. The axis of the two gears rotates, and the second gear 37 drives the second crank 38 and the shifter 39 to rotate. The shifter 39 slides in the slide body 42, which drives the slide body 42 and the slide bar 41 to slide back and forth along the slide rail 40. The slide bar 41 drives the cylinder 44 and the brush 45 to rotate around the axis of the rotating shaft 30, and also moves back and forth along the radial direction of the internal gear 34. It also moves up and down with the internal floating plate 2 to clean the inner wall and bottom wall of the storage tank, preventing corrosion and damage to the inner wall of the storage tank and affecting the service life of the storage tank.

[0039] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A VOCs emission environmental protection treatment device for internal floating roof storage tanks, characterized in that, include: Storage tank (1), inner floating plate (2), fixing plate (3), sealing cloth (4) and adsorption box (5). The top of the inner wall of storage tank (1) is provided with fixing plate (3). The inner floating plate (2) is connected to the fixing plate (3) through sealing cloth (4). The top of the inner floating plate (2) is provided with adsorption box (5). One end of suction pipe (6) is connected to adsorption box (5). The other end of suction pipe (6) extends through inner floating plate (2) into storage tank (1). The top of storage tank (1) is provided with exhaust pipe (7). One end of hose (8) is connected to the top of adsorption box (5). The other end of hose (8) is connected to the bottom of exhaust pipe (7). A horizontal channel (12) is provided inside the adsorption box (5). A first opening (13) is provided at the upper end of the channel (12), and a second opening (14) is provided at the bottom end of the channel (12). An air inlet chamber (15) is provided at the bottom end of the channel (12), and an exhaust chamber (16) is provided at the top end of the channel (12). The first opening (13) is connected to the exhaust chamber (16), and the second opening (14) is connected to the air inlet chamber (15). The bottom end of the air inlet chamber (15) is connected to the suction pipe (6), and the top end of the exhaust chamber (16) is connected to the hose (8). A groove (17) is provided at the top end of the channel (12), and the groove (17) is connected to the channel (12). The groove (17) is located at the exhaust end. On the right side of chamber (16), a through hole (23) is provided at the top of the groove body (17). Multiple adsorption plates (18) are provided inside the groove body (17). Activated carbon is provided inside the adsorption plates (18). A push plate (19) is provided above the groove body (17). The push plate (19) is connected to the channel (12) by a spring (20). One end of the slide rod (21) is connected to the push plate (19). The other end of the slide rod (21) extends through the through hole (23) into the groove body (17) and is connected to the pressure plate (22). A first cylinder (24) in the horizontal direction is provided on the inner wall of the adsorption box (5). The piston rod of the first cylinder (24) extends into the right end of the channel (12) and is connected to the push rod (25).

2. The VOCs emission environmental protection treatment equipment for an internal floating roof storage tank according to claim 1, characterized in that, A suction pump (9) is installed on the suction pipe (6).

3. The VOCs emission environmental protection treatment equipment for an internal floating roof storage tank according to claim 2, characterized in that, A gas concentration sensor (10) is installed at the bottom of the inner floating plate (2), and a controller (11) is installed inside the adsorption box (5). The gas concentration sensor (10) is connected to the controller (11), and the controller (11) is connected to the suction pump (9).

4. The VOCs emission environmental protection treatment equipment for an internal floating roof storage tank according to claim 1, characterized in that, Elastic limiting blocks (26) are respectively provided on both sides of the second opening (14) on the inner wall of the channel (12).

5. The VOCs emission environmental protection treatment equipment for an internal floating roof storage tank according to claim 1, characterized in that, A storage box (27) is provided on the left side of the air intake chamber (15).

6. The VOCs emission environmental protection treatment equipment for an internal floating roof storage tank according to claim 1, characterized in that, An inspection port (28) is provided on the outer wall of the adsorption box (5), and a cover plate (29) is provided on the inspection port (28). The cover plate (29) is connected to the adsorption box (5) by screws.

7. The VOCs emission environmental protection treatment equipment for an internal floating roof storage tank according to claim 1, characterized in that, It also includes a cleaning device, which includes: a rotating shaft (30), a first gear (31), a rack (32), a second cylinder (33), and an internal gear (34). The rotating shaft (30) passes through the inner floating plate (2) and is rotatably connected to the inner floating plate (2). The upper end of the rotating shaft (30) extends into the adsorption box (5) and is coaxially connected to the first gear (31). The first gear (31) meshes with the horizontal rack (32). The second cylinder (33) is provided on the inner wall of the adsorption box (5). The piston rod of the second cylinder (33) is connected to the rack (32). An internal gear (34) is provided below the inner floating plate (2). The internal gear (34) is connected to the bottom end of the inner floating plate (2) through a connecting rod (35). The lower end of the rotating shaft (30) is connected to the first crank. (36) One end is connected to the first crank (36) and the other end is rotatably connected to the second gear (37). The second gear (37) meshes with the internal gear (34). One end of the second crank (38) is connected to the center of the bottom of the second gear (37). The other end of the second crank (38) is connected to the shift post (39). A slide rail (40) extending along the length direction is provided on the first crank (36). The slide bar (41) is slidably connected to the slide rail (40). One end of the slide bar (41) is vertically connected to the slide groove body (42). The shift post (39) can slide in the slide groove body (42). One end of the connecting post (43) is connected to the slide bar (41). The other end of the connecting post (43) is coaxially connected to the cylinder (44). Brush bristles (45) are provided on the outer wall of the cylinder (44).

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