A single-stage rubber diaphragm sealed dry gas holder condensate collection and discharge device

Abstract

This invention relates to a single-stage rubber diaphragm-sealed dry gas holder condensate collection and discharge device, comprising a condensate collection tank, drain pipes, and a support. The condensate collection tank consists of an inner ring collection tank and an outer ring collection tank. The inner ring collection tank is located directly below the outer edge of the piston base plate in the gas holder, and the outer ring collection tank is located directly below the rubber sealing diaphragm in the gas holder. Multiple drain pipes are arranged circumferentially along the condensate collection tank, and the bottoms of the inner and outer ring collection tanks are connected to the drain pipes. The drain pipes are arranged radially inclined along the gas holder, and their lower ends are connected to the bottom drainage device of the gas holder. The condensate collection tank is connected to the piston bottom support via the support. The device of this invention can automatically collect condensate dripping along the edge of the piston base plate and the sealing steel section, and guide it orderly into the bottom drainage system of the gas holder, thereby completely eliminating the problem of localized corrosion of the gas holder bottom plate caused by fixed-point dripping condensate. The device has a reasonable structure, is easy to install, and has good corrosion resistance.

Description

Technical Field

[0001] This invention relates to the field of gas storage and transportation technology, and in particular to a single-stage rubber membrane sealed dry gas holder condensate collection and discharge device. Background Technology

[0002] A single-stage rubber diaphragm sealed dry gas holder (referred to as "gas holder") is a type of dry gas holder that uses a flexible rubber diaphragm for sealing and has a single cylindrical structure. It is one of the mainstream equipment for modern large-scale industrial gas storage.

[0003] The working principle of a single-stage rubber diaphragm sealed dry gas holder is as follows: The rubber diaphragm hangs like a curtain between the piston and the holder wall. Under the action of gravity, the sealing oil in the piston oil groove forms a continuous oil curtain within the narrow space formed by the rubber diaphragm and the holder wall. This oil curtain effectively prevents the gas from leaking upwards. When gas is introduced into the gas holder, the increased gas pressure pushes the piston upwards, and the rubber diaphragm is "pulled" downwards from the upper fixed point. At the same time, the piston oil groove rises with the piston, and the oil curtain continues to seal. When gas is extracted from the gas holder, the gas pressure decreases, and the piston descends under its own weight and the upper counterweight. The rubber diaphragm is "pushed back" to the upper fixed point, and the oil curtain remains sealed. Throughout the sealing process, the rubber diaphragm, through its great flexibility, adapts to the continuous changes in the distance between the piston and the fixed side wall, while the oil curtain provides a dynamic and wear-free seal.

[0004] Currently, single-stage rubber diaphragm sealed dry gas holders play a crucial role in large-scale gas balancing and storage in industries such as steel, energy, and chemicals due to their advantages of simple structure, reliable sealing, stable pressure, convenient maintenance, and excellent large-scale capabilities.

[0005] However, in actual operation, due to the difference in temperature and humidity between the gas inside the gas holder and the external environment, especially in the sealing area where the piston plate contacts the side wall, water vapor easily condenses to form condensate. This condensate drips continuously along the edge of the piston bottom plate and the steel components (hereinafter referred to as sealing steel) in the sealing structure. Existing gas holders usually have a central drainage system at the bottom to remove accumulated water, such as the "a special bottom plate drainer for rubber membrane sealed gas holders" published in Chinese patent application CN120626940A and the "a single-section rubber membrane sealed dry gas holder without a top" published in Chinese patent application CN205278755U (with a drainage device in the water trough); however, these only address the drainage of water accumulated at the bottom of the holder and cannot effectively handle the condensate dripping from above. If this condensate is not treated in time, it will cause the following hazards: 1) Localized corrosion: Condensate drips onto a limited area of ​​the cabinet bottom plate over a long period of time, forming a "puddle effect". This causes the steel plate in this area to be in an electrolyte environment for a long time, making it extremely susceptible to corrosion.

[0006] 2) Acid corrosion: Impurities such as hydrogen sulfide (H2S) and chloride contained in coal gas dissolve in condensate to form acidic electrolytes, causing rapid chemical and electrochemical corrosion of the cabinet bottom plate (usually made of carbon steel).

[0007] 3) Safety hazards: Long-term localized corrosion eventually leads to perforation of the bottom plate of the gas holder, causing gas leakage. This not only wastes energy and pollutes the environment, but also poses major safety risks such as explosion and poisoning, forcing the gas holder to shut down and causing huge economic losses.

[0008] Therefore, developing a device that can collect and drain the condensate dripping from above is crucial for ensuring the long-term safe operation of gas holders and extending the service life of the equipment. Summary of the Invention

[0009] This invention provides a single-stage rubber membrane sealed dry gas holder condensate collection and discharge device, which can automatically collect condensate dripping along the edge of the piston bottom plate and the sealing steel part, and orderly guide it into the bottom drainage system of the gas holder, thereby completely eliminating the problem of local corrosion of the gas holder bottom plate caused by fixed-point dripping of condensate; the device has a reasonable structure, is easy to install, and has good corrosion resistance.

[0010] To achieve the above objectives, the present invention employs the following technical solution: A single-stage rubber diaphragm sealed dry gas holder condensate collection and discharge device includes a condensate collection tank, drain pipes, and a support frame. The condensate collection tank consists of an inner ring tank and an outer ring tank, both of which are annular structures. The inner ring tank is located directly below the outer edge of the piston base plate in the gas holder, and the outer ring tank is located directly below the rubber sealing diaphragm in the gas holder. Multiple drain pipes are arranged circumferentially along the condensate collection tank. Drain holes are provided at the bottom of the inner and outer ring tanks, connecting to the drain pipes. The drain pipes are arranged radially inclined along the gas holder, with the outer end being the lower end. The lower end of the drain pipe is connected to the bottom drainage device of the gas holder. The condensate collection tank is supported and connected to the piston bottom via a support frame.

[0011] Multiple drainage devices are installed at the bottom of the gas holder along the circumference of the gas holder, and the drainage pipes are installed one-to-one with the drainage devices at the bottom of the gas holder.

[0012] The high end of the drain pipe is sealed by a cover plate, and the cover plate is connected to the drain pipe by a flange and bolts.

[0013] The condensate collection tank and drain pipe are both made of acid-resistant materials, including polypropylene, fiberglass and stainless steel.

[0014] The bracket is made of ordinary carbon steel and coated with an anti-corrosion coating.

[0015] Both the inner and outer ring collecting channels are composed of multiple arc-shaped channels, which are connected by flanges. There are multiple supports, with at least one support corresponding to each arc-shaped channel.

[0016] Pipe supports are respectively provided at the connection points between the inner and outer ring collection channels and the bracket.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1) Eliminate corrosion risks at the source: All dripping condensate is collected by a ring-shaped collection tank and discharged in time through a drain pipe, avoiding direct contact between condensate and the bottom plate of the gas holder, thus fundamentally eliminating the root cause of local corrosion of the bottom plate.

[0018] 2) Safe and reliable, with good integration with the original system: The condensate collection and discharge device is fixed to the bottom support of the piston by a bracket, which does not affect the normal operation of the gas holder and does not require additional power; the collected condensate is discharged through the original bottom drainage device of the gas holder, making the structure simpler.

[0019] 3) Corrosion resistant and long service life: Key components are made of corrosion resistant materials, which can withstand the erosion of acidic condensate, ensuring the overall service life of the condensate collection and discharge device is long and the operation is reliable.

[0020] 4) Easy to install and maintain: The condensate collection tank adopts a multi-section assembly connection structure, which is very suitable for assembly inside the gas holder where space is limited; the inner end of the drain pipe is equipped with an inspection port and a cover plate with flange connection, making daily inspection and unblocking extremely convenient.

[0021] 5) Significant economic benefits: The installation of a condensate collection and discharge device can greatly extend the service life of the gas holder bottom plate, reduce unplanned shutdowns and major repairs caused by corrosion and perforation of the bottom plate, save a lot of maintenance costs, avoid production losses, and effectively prevent energy leakage and environmental pollution. Attached Figure Description

[0022] Figure 1 This is a partial plan view of the condensate collection and discharge device described in this invention.

[0023] Figure 2 yes Figure 1 The 1-1 view in the image.

[0024] Figure 3 yes Figure 1 View 2-2 in the image.

[0025] In the diagram: 11. Inner ring collection trough; 12. Outer ring collection trough; 13. Drain pipe; 14. Bracket; 15. Cover plate; 2. Drainage device at the bottom of the gas holder; 31. Gas holder side plate; 32. Gas holder bottom plate; 33. Piston bottom plate; 34. Rubber sealing membrane; 35. Piston bracket; 36. Piston bottom support. Detailed Implementation

[0026] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings: like Figures 1-3 As shown, the single-section rubber membrane sealed dry gas holder condensate collection and discharge device of the present invention includes a condensate collection tank, a drain pipe 13, and a support 14. The condensate collection tank consists of an inner ring collection tank 11 and an outer ring collection tank 12, both of which are annular structures. The inner ring collection tank 11 is located directly below the outer edge of the piston bottom plate 33 in the gas holder, and the outer ring collection tank 12 is located directly below the rubber sealing membrane 34 in the gas holder. Multiple drain pipes 13 are arranged circumferentially along the condensate collection tank. The bottom of the inner ring collection tank 11 and the outer ring collection tank 12 are provided with drain holes that communicate with the drain pipes 13. The drain pipes 13 are arranged radially inclined along the gas holder, with the outer end being the lower end. The lower end of the drain pipes 13 is connected to the bottom drainage device 2 of the gas holder. The condensate collection tank is connected to the piston bottom support 36 through the support 14.

[0027] Multiple drainage devices 2 are installed at the bottom of the gas holder along the circumference of the gas holder, and drainage pipes 13 are installed one-to-one with drainage devices 2.

[0028] The high end of the drain pipe 13 is sealed by a cover plate 15, and the cover plate 15 is connected to the drain pipe 13 by a flange and bolts.

[0029] The condensate collection tank and drain pipe 13 are both made of acid-resistant materials; the acid-resistant materials include polypropylene, fiberglass and stainless steel.

[0030] The bracket 14 is made of ordinary carbon steel and has an anti-corrosion coating on its surface.

[0031] Both the inner ring collecting groove 11 and the outer ring collecting groove 12 are composed of multiple arc groove sections, which are connected by flanges. There are multiple supports 14, and at least one support 14 is provided for each arc groove section.

[0032] Pipe supports are respectively provided at the connection points between the inner ring collection trough 11 and the outer ring collection trough 12 and the bracket 14.

[0033] The single-stage rubber diaphragm sealed dry gas holder is mainly used for storing converter gas, blast furnace gas, or natural gas. The gas holder contains a piston and a rubber sealing diaphragm 34. The piston is supported by a piston support structure, which includes a piston bottom support 36 and a piston bracket 35. The piston bottom support 36 is mounted on the gas holder bottom plate 33, and the piston bracket 35 is mounted on the piston bottom support 36. The piston is mounted on the piston bracket 35. The rubber sealing diaphragm 34 is installed in the annular space between the piston bracket 35 and the gas holder side plate 31. A bottom drainage device 2 is installed at the bottom of the gas holder.

[0034] The condensate collection and discharge device described in this invention is an improvement on the existing single-section rubber membrane sealed dry gas holder structure. Its purpose is to collect and discharge the condensate dripping from the top in a timely manner to prevent the condensate from corroding the gas holder bottom plate 32, especially the localized corrosion caused by the condensate.

[0035] The condensate collection and discharge device of the present invention adopts an annular condensate collection tank to collect condensate dripping from the edge of the piston base plate 33 and the bottom of the rubber sealing membrane 34. The condensate collection tank includes an inner ring collection tank 11 (for collecting condensate dripping from the edge of the piston base plate 33) and an outer ring collection tank 12 (for collecting condensate dripping from the bottom of the rubber sealing membrane 34), which are coaxially arranged.

[0036] The inner ring collection tank 11 and the outer ring collection tank 12 are supported by the same bracket 14 at the same support point. The bracket 14 is fixed to the piston bottom support 36. Multiple brackets 14 are arranged along the circumference of the gas holder. Pipe supports are configured on the brackets 14 to fix the condensate collection tank. The brackets 14 adopt steel structure supports to ensure that the rigidity and strength can withstand the weight of the condensate collection tank, condensate, and drain pipe.

[0037] Both the inner ring collecting trough 11 and the outer ring collecting trough 12 are annular trough structures, preferably multi-segmented and connected by flanges, which facilitates assembly or replacement within the gas holder.

[0038] The top of the drain pipe 13 is connected to the condensate collection tank to discharge the collected condensate. In order to discharge the condensate smoothly and quickly, the drain pipe 13 is laid radially along the gas holder and with a certain slope. Its outer end (lower end) is the drain end, which can be directly inserted into the drain outlet of the drain device 2 at the bottom of the gas holder. The inner end (higher end) is the maintenance end, which is normally closed by the cover plate 15. The cover plate 15 is connected to the drain pipe by flange and bolts, which can be quickly disassembled to facilitate unblocking the drain pipe 13.

[0039] In the condensate collection and discharge device, all components that come into direct contact with condensate, including the condensate collection tank, drain pipe 13, cover plate 15, and flanges, are made of acid-corrosion-resistant materials such as PP (polypropylene), FRP (fiberglass reinforced plastic), or stainless steel (preferably 304 stainless steel). The bracket 14 can be made of ordinary carbon steel, but it needs to be coated with an anti-corrosion coating.

[0040] The installation process of the single-stage rubber membrane sealed dry gas holder condensate collection and discharge device described in this invention is as follows: 1) Install bracket 14 on piston bottom support 36, and install tube support on bracket 14 according to the design position; 2) Install the condensate collection tank onto the bracket 14. The inner ring collection tank 11 is installed directly below the edge of the piston base plate 33, and the outer ring collection tank 12 is installed directly below the rubber sealing membrane 34. 3) A drain pipe 13 is installed at the bottom of the condensate collection tank. The drain pipe 13 is installed in a one-to-one correspondence with the drain device 2 at the bottom of the cabinet. The drain pipe 13 is horizontally connected to the inner ring collection tank 11 and the outer ring collection tank 12. Drain holes are opened at the connection between the inner ring collection tank 11 and the outer ring collection tank 12 and the drain pipe 13. 4) Set the slope of the drain pipe 13 according to the distribution of the drain pipe 13 to ensure that the condensate is discharged smoothly; the drain end of the drain pipe 13 is directly inserted into the drain outlet of the corresponding cabinet bottom drain device 2. 5) The inspection end of the drain pipe 13 is sealed with a cover plate 15, which is detachably connected to the drain pipe 13 by a flange and bolts.

[0041] During operation of the gas holder, condensate on the piston flows downwards along the outer wall of the piston, drips down at the edge of the piston base plate 33, and is collected by the inner ring collection groove 11 below before entering the drain pipe. Condensate on the rubber sealing membrane 34 flows downwards along the rubber sealing membrane 34, drips down at the bottom, and is collected by the outer ring collection groove 12 below before entering the drain pipe. The condensate in the drain pipe 13 is discharged to the drain outlet of the bottom drainage device 2 of the gas holder, and is discharged along with the water accumulated at the bottom of the gas holder.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A single-stage rubber diaphragm sealed dry gas holder condensate collection and discharge device, characterized in that, The device includes a condensate collection and discharge system consisting of a condensate collection tank, drain pipes, and a support frame. The condensate collection tank is composed of an inner ring collection tank and an outer ring collection tank, both of which are annular structures. The inner ring collection tank is located directly below the outer edge of the piston base plate in the gas holder, and the outer ring collection tank is located directly below the rubber sealing membrane in the gas holder. Multiple drain pipes are arranged circumferentially along the condensate collection tank. Drain holes are provided at the bottom of the inner and outer ring collection tanks and connected to the drain pipes. The drain pipes are arranged radially inclined along the gas holder, with the outer end being the lower end. The lower end of the drain pipes is connected to the bottom drainage device of the gas holder. The condensate collection tank is connected to the piston base support via a support frame.

2. The single-stage rubber membrane sealed dry gas holder condensate collection and discharge device according to claim 1, characterized in that, Multiple drainage devices are installed at the bottom of the gas holder along the circumference of the gas holder, and the drainage pipes are installed one-to-one with the drainage devices at the bottom of the gas holder.

3. The single-stage rubber membrane sealed dry gas holder condensate collection and discharge device according to claim 1, characterized in that, The high end of the drain pipe is sealed by a cover plate, and the cover plate is connected to the drain pipe by a flange and bolts.

4. The single-stage rubber membrane sealed dry gas holder condensate collection and discharge device according to claim 1, characterized in that, The condensate collection tank and drain pipe are both made of acid-resistant materials, including polypropylene, fiberglass and stainless steel.

5. The single-stage rubber membrane sealed dry gas holder condensate collection and discharge device according to claim 1, characterized in that, The bracket is made of ordinary carbon steel and coated with an anti-corrosion coating.

6. The single-stage rubber membrane sealed dry gas holder condensate collection and discharge device according to claim 1, characterized in that, Both the inner and outer ring collecting channels are composed of multiple arc-shaped channels, which are connected by flanges. There are multiple supports, with at least one support corresponding to each arc-shaped channel.

7. The single-stage rubber membrane sealed dry gas holder condensate collection and discharge device according to claim 1, characterized in that, Pipe supports are respectively provided at the connection points between the inner and outer ring collection channels and the bracket.

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