A VOCs emission reduction device for fully liquid-contact internal floating roof storage tank

Abstract

This utility model provides a VOCs emission reduction device for a fully liquid-contact internal floating roof storage tank, belonging to the field of emission reduction technology. It includes a tank body, with a sealing assembly fixedly installed inside the tank body. A floating assembly is slidably installed on the inner side of the sealing assembly, located below the sealing assembly. The sealing assembly includes a sealing pressure plate that fits snugly against the inner wall of the tank body. In this utility model, the sealing pressure plate is fixed to the edge of the floating assembly by bolts. A stainless steel spring plate is installed in an arc shape inside the pressure plate, continuously applying elastic force outwards to push the entire sealing pressure plate tightly against the tank wall. Under the action of the spring force, the sealing pressure plate always fits against the tank wall. When encountering welds or depressions in the tank wall, the stainless steel spring plate automatically increases the thrust, causing the rubber tongue to tightly fill the uneven areas. In straight sections, it maintains uniform contact pressure. The elasticity of the stainless steel spring plate ensures a full-circumference seal without dead angles.

Description

Technical Field

[0001] This utility model relates to the field of emission reduction technology, and more specifically, to a VOCs emission reduction device for a fully liquid-contact internal floating roof storage tank. Background Technology

[0002] A fully liquid-contact internal floating roof tank refers to an internal floating roof tank where the floating roof is in complete contact with the stored liquid (such as crude oil, refined oil, chemical raw materials, etc.). Its floating roof design can significantly reduce the gas phase space above the liquid, lowering the VOCs emission base. However, to meet environmental emission requirements (such as the VOCs emission limit of ≤2.0 mg / m³ in my country's "Emission Standard for Air Pollutants from Oil Depots"), further measures are required. 3 However, it is still necessary to provide supporting professional emission reduction equipment to form a complete emission reduction system of "sealing + collection + treatment".

[0003] The existing technology still has the following drawbacks:

[0004] (1) An annular gap will be formed between the floating roof and the tank wall. Oil and gas molecules can continuously escape through capillary action. Oil and gas will leak through tiny gaps such as welds and depressions. Air will seep into the tank through the sealed gaps, causing the oxygen content in the top space of the storage tank to exceed the standard, increasing the risk of medium oxidation, affecting the quality of oil products, and causing the complete loss of environmental compliance.

[0005] (2) The liquid surface is directly exposed to the top space of the tank, forming a large-area evaporation interface, which leads to serious exceedance of environmental protection indicators.

[0006] Therefore, a VOCs emission reduction device for fully liquid-contact internal floating roof storage tanks is proposed. Utility Model Content

[0007] The purpose of this invention is to address the existing problem of imperfect sealing.

[0008] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0009] The present invention is as follows: a VOCs emission reduction device for a fully liquid-contact internal floating roof storage tank, comprising a tank body, a sealing assembly fixedly installed inside the tank body, and a floating assembly slidably installed on the inner side of the sealing assembly, the floating assembly being located at the lower part of the sealing assembly;

[0010] The sealing assembly includes a sealing pressure plate that fits against the inner wall of the tank. A stainless steel spring sheet is fixedly installed on the sealing pressure plate. The stainless steel spring sheet is located on the inner side wall of the sealing pressure plate. A rubber tongue plate is fixedly connected between the sealing pressure plate and the tank. The stainless steel spring sheet and the sealing pressure plate are fixed together by bolts.

[0011] As a preferred technical solution of this utility model, the floating assembly includes a floating panel located inside the sealing pressure plate, a pontoon fixedly installed on the lower part of the floating panel, a support frame fixedly installed on the outer side of the pontoon, the support frame being located at the lower part of the floating panel, the support frame being fixed to the floating panel by bolts, and pillars fixedly installed around the lower perimeter of the floating panel.

[0012] As a preferred technical solution of this utility model, a guide column is installed through the floating panel, and a stainless steel guide wheel is provided on the guide column. The guide column and the floating panel slide through a guide rail, and the stainless steel guide wheel is located at the lower part of the floating panel.

[0013] As a preferred technical solution of this utility model, a sealing scraper is fixedly installed on the outer side of the floating panel, the sealing scraper is in contact with the inner side wall of the sealing pressure plate, and an inspection port is provided on the upper part of the floating panel.

[0014] As a preferred technical solution of this utility model, a secondary sealing baffle is fixedly installed on the upper inner side of the sealing pressure plate, a pressure valve is fixedly installed on the side of the secondary sealing baffle, and a top cover is provided on the upper part of the pressure valve.

[0015] As a preferred technical solution of this utility model, a rain cover is fixedly installed on the top of the tank body. The rain cover is located above the secondary sealing baffle, and the rain cover is fixedly connected to the tank body by bolts.

[0016] As a preferred technical solution of this utility model, a waveguide is installed through the floating panel, and the waveguide is located inside the tank.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. Through the set sealing components, the sealing pressure plate is fixed to the edge of the floating component by bolts. The stainless steel spring plate is installed in an arc shape on the inner side of the pressure plate, continuously applying elastic force outward to push the entire sealing pressure plate tightly against the tank wall. Under the action of spring force, the sealing pressure plate always fits against the tank wall. When it encounters a weld seam or depression in the tank wall, the spring plate automatically increases the thrust, so that the rubber tongue plate tightly fills the uneven area. In the straight section, it maintains uniform contact pressure. The elasticity of the stainless steel spring plate ensures a full circumference seal without dead corners.

[0019] 2. With the floating components in place, the floating panel always floats on the oil surface during use due to the buoyancy provided by the floats. It automatically floats up and down with the rise and fall of the oil level, always covering the oil surface. The floats and the support frame form a three-dimensional buoyancy unit. The distributed layout ensures that the floating panel moves smoothly during the raising and lowering process. Even if some floats fail, the equipment can still maintain normal operation. At the same time, the support columns under the floating panel provide a certain space for the floating panel, effectively preventing structural damage when the floating panel touches the bottom or when there is abnormal pressure. Attached Figure Description

[0020] Figure 1 A schematic diagram of the VOCs emission reduction device for a fully liquid-contact internal floating roof storage tank provided by this utility model;

[0021] Figure 2 A side view of the VOCs emission reduction device for a fully liquid-contact internal floating roof storage tank provided by this utility model;

[0022] Figure 3 A partial cross-sectional structural schematic diagram of the VOCs emission reduction device for the fully liquid-contact internal floating roof storage tank provided by this utility model;

[0023] Figure 4 A partial cross-sectional structural schematic diagram of the VOCs emission reduction device for the fully liquid-contact internal floating roof storage tank provided by this utility model;

[0024] Figure 5 A partial cross-sectional structural diagram of the VOCs emission reduction device for the fully liquid-contact internal floating roof storage tank provided by this utility model.

[0025] The diagram shows: 1. Tank body; 2. Sealing assembly; 201. Sealing pressure plate; 202. Stainless steel spring plate; 203. Rubber tongue plate; 3. Floating assembly; 301. Floating plate panel; 302. Float; 303. Support frame; 304. Support column; 4. Guide column; 5. Stainless steel guide wheel; 6. Sealing scraper; 7. Inspection port; 8. Secondary sealing baffle; 9. Pressure valve; 10. Top cover; 11. Rain cover; 12. Waveguide. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0027] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0028] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] like Figures 1-5 As shown, this embodiment proposes a VOCs emission reduction device for a fully liquid-contact internal floating roof storage tank, including a tank body 1, a sealing assembly 2 fixedly installed inside the tank body 1, and a floating assembly 3 slidably installed inside the sealing assembly 2, with the floating assembly 3 located at the lower part of the sealing assembly 2.

[0031] The sealing assembly 2 includes a sealing pressure plate 201 that is fitted and connected to the inner wall of the tank body 1. A stainless steel spring plate 202 is fixedly installed on the sealing pressure plate 201, located on the inner side wall of the sealing pressure plate 201. A rubber tongue plate 203 is fixedly connected between the sealing pressure plate 201 and the tank body 1. The stainless steel spring plate 202 and the sealing pressure plate 201 are fixed together by bolts. The sealing pressure plate 201 is fixed to the edge of the floating assembly 3 by bolts. The stainless steel spring plate 202 is installed in an arc shape on the inner side of the pressure plate, continuously applying elastic force outward to push the entire sealing pressure plate 201 tightly against the tank wall. Under the action of spring force, the sealing pressure plate 201 always fits against the tank wall. When encountering a weld or depression in the tank wall, the stainless steel spring plate automatically increases the thrust, making the rubber tongue plate 203 tightly fill the uneven area. In straight sections, it maintains uniform contact pressure. The elasticity of the stainless steel spring plate 202 ensures a full circumference seal without dead corners.

[0032] like Figures 2-5As shown, in a preferred embodiment, based on the above method, the floating assembly 3 further includes a floating panel 301 located inside the sealing pressure plate 201. A pontoon 302 is fixedly installed on the lower part of the floating panel 301, and a support frame 303 is fixedly installed on the outer side of the pontoon 302. The support frame 303 is located at the lower part of the floating panel 301, and the support frame 303 is fixed to the floating panel 301 by bolts. A support column 304 is fixedly installed around the lower part of the floating panel 301. During use, the floating panel 301 floats on the oil surface with the buoyancy provided by the float 302. It automatically floats up and down with the rise and fall of the liquid level, always covering the oil surface. The float 302 and the support frame 303 form a three-dimensional buoyancy unit. The distributed layout ensures that the floating panel 301 moves smoothly during the raising and lowering process. Even if some floats 302 fail, the equipment can still maintain normal operation. At the same time, the support column 304 at the bottom of the floating panel 301 provides a certain space for the floating panel 301, effectively preventing structural damage when the floating panel 301 touches the bottom or when there is abnormal pressure.

[0033] like Figure 2 , Figure 4 and Figure 5 As shown, in a preferred embodiment, based on the above method, a guide post 4 is further installed through the floating roof panel 301, and a stainless steel guide wheel 5 is provided on the guide post 4. The guide post 4 and the floating roof panel 301 slide together via a guide rail, and the stainless steel guide wheel 5 is located at the lower part of the floating roof panel 301. The stainless steel guide wheel 5 rolls along the guide rail on the tank wall on the guide post 4, which can prevent the floating roof panel 301 from rotating and deviating, and also reduce lifting friction.

[0034] like Figures 3-5 As shown, in a preferred embodiment, based on the above method, a sealing scraper 6 is further fixedly installed on the outer side of the floating plate 301. The sealing scraper 6 is in contact with the inner sidewall of the sealing pressure plate 201, and an inspection port 7 is provided at the upper part of the floating plate 301. When the sealing pressure plate 201 develops minor gaps due to long-term use, the sealing scraper 6 can continue to scrape off the oil film adhering to the tank wall to block the remaining oil and gas, while forming a double guarantee with the sealing pressure plate 201. The inspection port 7 allows workers to check the sealing status at any time.

[0035] like Figures 1-5 As shown, in a preferred embodiment, based on the above method, a secondary sealing baffle 8 is fixedly installed on the upper inner side of the sealing plate 201, and a pressure valve 9 is fixedly installed on the side of the secondary sealing baffle 8. A top cover 10 is provided on the upper part of the pressure valve 9. When the gas pressure inside the tank is abnormal, it automatically opens and closes. When there is overpressure, the top cover 10 pops open to release gas, and when there is negative pressure, it draws in air. Especially when there is a large temperature difference between day and night, it can effectively avoid losses.

[0036] like Figures 1-5As shown, in a preferred embodiment, based on the above method, a rain cover 11 is further fixedly installed on the top of the tank body 1. The rain cover 11 is located above the secondary sealing baffle 8, and the rain cover 11 is fixedly connected to the tank body 1 by bolts. The rain cover 11 on the top of the tank completely covers the secondary sealing area, preventing rain and blocking ultraviolet rays from accelerating the aging of the seals.

[0037] like Figures 2-5 As shown, in a preferred embodiment, based on the above method, a waveguide 12 is further installed through the floating roof panel 301, and the waveguide 12 is located inside the tank body 1. The waveguide 12 uses radar waves to accurately measure the liquid level, and workers can monitor the oil storage volume in real time through the central control room, avoiding the emission of VOCs caused by manual gauging and opening the lid for measurement.

[0038] Specifically, in use, the VOCs emission reduction equipment for this fully liquid-contact internal floating roof tank works as follows: the sealing pressure plate 201 is fixed to the edge of the floating assembly 3 by bolts; the stainless steel spring plate 202 is installed in an arc shape on the inner side of the pressure plate, continuously applying elastic force outward to push the entire sealing pressure plate 201 tightly against the tank wall. Under the action of spring force, the sealing pressure plate 201 always adheres to the tank wall. When encountering weld seams or depressions in the tank wall, the stainless steel spring plate automatically increases the thrust, making the rubber tongue plate 203 tightly fill the uneven areas; in straight sections, it maintains uniform contact pressure. The elasticity of the stainless steel spring plate 202 ensures a full circumference seal without dead corners. The floating roof panel 301 always floats on the oil surface through the buoyancy provided by the float 302, automatically floating up and down with the rise and fall of the liquid level, always covering the oil surface. The float 302 and the support frame 303 form a three-dimensional buoyancy. The unit, through a distributed layout, ensures the smooth movement of the floating panel 301 during lifting and lowering. Even if a partial float 302 fails, the equipment can still maintain normal operation. At the same time, the support column 304 at the bottom of the floating panel 301 provides a certain space for the floating panel 301, effectively preventing structural damage when the floating panel 301 touches the bottom or when there is abnormal pressure. The stainless steel guide wheel 5 rolls on the guide column 4 along the guide rail on the tank wall to prevent the floating panel 301 from rotating and shifting. When the sealing pressure plate 201 develops a small gap due to long-term use, the sealing scraper 6 can continue to scrape off the oil film attached to the tank wall to block the remaining oil and gas, and at the same time, it forms a double insurance with the sealing pressure plate 201. The inspection port 7 allows workers to check the sealing status at any time. It automatically opens and closes when the air pressure inside the tank is abnormal. When there is overpressure, the top cover 10 pops open to exhaust air, and when there is negative pressure, it draws in air.

[0039] All technical features in this embodiment can be freely combined according to actual needs.

[0040] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A VOCs emission reduction device for full-liquid-in-float roof storage tank, comprising a tank body (1), characterized in that, A sealing assembly (2) is fixedly installed inside the tank (1), and a floating assembly (3) is slidably installed on the inner side of the sealing assembly (2). The floating assembly (3) is located at the lower part of the sealing assembly (2). The sealing assembly (2) includes a sealing pressure plate (201) that is fitted and connected to the inner wall of the tank (1). A stainless steel spring plate (202) is fixedly installed on the sealing pressure plate (201). The stainless steel spring plate (202) is located on the inner side wall of the sealing pressure plate (201). A rubber tongue plate (203) is fixedly connected between the sealing pressure plate (201) and the tank (1). The stainless steel spring plate (202) and the sealing pressure plate (201) are fixed together by bolts.

2. The VOCs emission reduction equipment for full-liquid-in-float-roof tank according to claim 1, characterized in that, The floating assembly (3) includes a floating panel (301) located inside the sealing pressure plate (201). A pontoon (302) is fixedly installed on the lower part of the floating panel (301). A support frame (303) is fixedly installed on the outer side of the pontoon (302). The support frame (303) is located at the lower part of the floating panel (301). The support frame (303) is fixed to the floating panel (301) by bolts. A support column (304) is fixedly installed around the lower part of the floating panel (301).

3. The VOCs emission reduction device for full-liquid-in-float-roof tank according to claim 2, characterized in that, A guide post (4) is installed through the floating panel (301), and a stainless steel guide wheel (5) is provided on the guide post (4). The guide post (4) and the floating panel (301) slide through a guide rail, and the stainless steel guide wheel (5) is located at the lower part of the floating panel (301).

4. The VOCs emission reduction device for full-liquid-in-float-roof tank according to claim 2, characterized in that, A sealing scraper (6) is fixedly installed on the outer side of the floating panel (301). The sealing scraper (6) is attached to the inner side wall of the sealing pressure plate (201). An inspection port (7) is opened on the upper part of the floating panel (301).

5. The VOCs emission reduction apparatus for full-liquid-in-float-roof tank according to claim 1, characterized in that, A secondary sealing baffle (8) is fixedly installed on the upper inner side of the sealing pressure plate (201), and a pressure valve (9) is fixedly installed on the side of the secondary sealing baffle (8). A top cover (10) is provided on the upper part of the pressure valve (9).

6. The VOCs emission reduction apparatus for full-liquid inside floating roof tank according to claim 1, characterized in that, A rain cover (11) is fixedly installed on the top of the tank (1). The rain cover (11) is located above the secondary sealing baffle (8). The rain cover (11) is fixedly connected to the tank (1) by bolts.

7. The VOCs emission reduction apparatus for full-liquid-in-float-roof tank according to claim 2, characterized in that, A waveguide (12) is installed through the floating panel (301), and the waveguide (12) is located inside the tank (1).

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