Horizontal variable-volume gas storage tank

Abstract

The invention discloses a horizontal variable-volume gas storage tank which comprises a tank body and a gas storage telescopic inner film. The gas storage telescopic inner film is arranged in the tank body, and the interior of the tank body is divided into two gas cavities by the gas storage telescopic inner film; the bottom of the lower shell is respectively connected with a tail gas feeding system and a tail gas treatment system through a pipeline and a valve; a first pipe opening and a second pipe opening are formed in the top of the upper shell, the first pipe opening is provided with a one-way air inlet valve, and the second pipe opening is provided with a one-way air outlet valve. And the tank body is provided with a gas storage capacity detection device for detecting the gas storage capacity. The horizontal variable-volume gas storage tank can buffer high-flow-rate intermittent tail gas, and has the characteristics of high efficiency, energy conservation and safety.

Description

Technical Field

[0001] The invention belongs to the technical field of gas storage tanks, and in particular relates to a horizontal variable-volume gas storage tank. Background Art

[0002] In the chemical production sector, the operation of equipment such as reactors, storage tanks, and vacuum pumps generates intermittent, low-volume, and high-concentration exhaust gases. These exhaust gas emission characteristics pose significant challenges to exhaust gas treatment.

[0003] Traditional exhaust gas treatment systems, lacking effective buffering and collection devices, require a high capacity design to cope with intermittent high-flow rates, significantly increasing initial investment. Conversely, if the exhaust gas treatment system's capacity is designed based on the average exhaust gas flow rate, when the instantaneous exhaust gas flow rate is excessive, the system's processing capacity is insufficient, resulting in some exhaust gas being discharged without effective treatment, which not only pollutes the environment but may also violate environmental regulations. Furthermore, the intermittent nature of exhaust emissions requires frequent system startups and shutdowns, which not only consumes significant energy and increases operating costs, but also shortens the equipment's lifespan and increases maintenance costs. Summary of the Invention

[0004] In order to solve the above problems in the prior art, the present invention proposes a horizontal variable volume gas storage tank, which can buffer high-flow intermittent exhaust gas and has the characteristics of high efficiency, energy saving and safety.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a horizontal variable-volume gas storage tank, including a tank body and a gas storage telescopic inner membrane; the tank body includes an upper shell, a lower shell and support legs, the upper shell and the lower shell are connected by a flange, and the gas storage telescopic inner membrane divides the tank body into two upper and lower cavities; a first pipe opening and a second pipe opening are provided on the top of the upper shell, the first pipe opening is provided with a one-way air inlet valve, and the second pipe opening is provided with a one-way air outlet valve; the tank body is provided with a gas storage volume detection device for detecting the gas storage volume; a third pipe opening is provided at the bottom of the lower shell, the third pipe opening is connected to an electrically controlled discharge valve, and the electrically controlled discharge valve is electrically connected to a PLC.

[0006] Furthermore, the shape of the gas-storage telescopic inner membrane is identical to that of the upper shell. When the cavity below the gas-storage telescopic inner membrane is inflated, the gas-storage telescopic inner membrane can swell upward until it contacts the inner wall of the upper shell. The gas-storage telescopic inner membrane has the same shape as that of the upper shell, and can only fully contact the upper shell when the cavity below the gas-storage telescopic inner membrane is full of air. The position of the gas-storage telescopic inner membrane changes with changes in the amount of air inflated.

[0007] Furthermore, the gas storage capacity detection device includes a gas level transmitter and a pressure transmitter, and both the gas level transmitter and the pressure transmitter are electrically connected to the PLC.

[0008] Furthermore, the gas level transmitter includes a proximity switch, a cylinder, a transmission mechanism and a gas level instrument, one end of the cylinder is connected to the top of the upper shell, the other end of the cylinder is bent horizontally toward one side of the tank body and then bent vertically downward, the bottom of the downward bent section of the cylinder is provided with the gas level instrument, the bottom of the inner bottom of the downward bent section of the cylinder is fixed with the proximity switch, and the proximity switch is electrically connected to the gas level instrument; the transmission mechanism includes a spring, a detection piece and a pull rope, the shell of the proximity switch is rod-shaped, the spring is sleeved on the proximity switch, one end of the spring is connected to the bottom of the cylinder, the top of the spring is fixedly connected to the detection piece, one end of the pull rope is connected to the detection piece, the pull rope passes through the cylinder, and the other end of the pull rope extends from the top of the upper shell into the tank body and is connected to the gas storage telescopic inner membrane; the proximity switch is used to detect the distance of the detection piece. When the amount of gas between the gas storage telescopic inner membrane and the lower shell decreases, the gas pressure is insufficient to support the weight of the gas storage telescopic inner membrane. The gas storage telescopic inner membrane collapses downward, resulting in a decrease in height and pulling the pull rope, causing the detection piece to move upward. The proximity switch measures an increase in the distance between the detection pieces. When the measured distance is greater than a preset threshold, the gas under the gas outlet telescopic inner membrane has been exhausted and the exhaust gas has been transported to the exhaust gas treatment system. At this time, the PLC controls the electronically controlled discharge valve to stop exhaust, connecting the reactor and the tank body, and the exhaust gas transported by the reactor is input into the tank body.

[0009] Furthermore, the pressure transmitter is a barometric pressure sensor, located within the lower housing and electrically connected to a PLC. When the pressure measured by the pressure transmitter exceeds a threshold, the PLC controls the electronically controlled exhaust valve to switch its position, thereby connecting the tank to a pipeline connected to the exhaust gas treatment system.

[0010] Furthermore, a combustible gas sensor is disposed between the gas storage inner membrane and the upper shell, and is electrically connected to the PLC. When the combustible gas content is too high, the electronically controlled exhaust valve is closed to stop air intake and simultaneously control the reactor to stop operation. The combustible gas sensor can detect combustible gas contained in exhaust gas from chemical production. In this application, the exhaust gas is stored between the gas storage inner membrane and the lower shell. If the exhaust gas leaks above the gas storage inner membrane (i.e., between the gas storage inner membrane and the upper shell), the leaked exhaust gas is detected and an alarm is issued.

[0011] Furthermore, an audible and visual alarm is provided, which is arranged outside the tank body and the combustible gas sensor is electrically connected to the audible and visual alarm. When the combustible gas content is too high, an alarm is sounded.

[0012] Furthermore, the gas storage telescopic inner membrane is made of modified polytetrafluoroethylene, which has the characteristics of acid resistance, alkali resistance and solvent resistance.

[0013] Furthermore, the gas storage and expansion inner membrane is blended with conductive materials to avoid the generation and accumulation of static electricity.

[0014] The beneficial effects of a horizontal variable-volume gas storage tank of the present invention are as follows: it is provided with a gas storage telescopic inner membrane, which is a layer of diaphragm arranged between the upper shell and the lower shell, dividing the interior of the tank into two upper and lower cavities. The high-flow rate and intermittent exhaust gas generated in chemical production is buffered and stored through the gas storage telescopic inner membrane, thereby improving the effectiveness of exhaust gas treatment and reducing the pollution of exhaust gas to the environment; the gas storage tank is equipped with equipment such as a gas level transmitter and a pressure transmitter, which can realize real-time monitoring of the gas storage volume and pressure, reduce the start-stop frequency of the exhaust gas treatment system, reduce energy consumption, and thus reduce equipment maintenance and operating costs; combined with a combustible gas sensor, it can ensure the safety of the use process; the gas storage telescopic inner membrane is made of modified polytetrafluoroethylene and blended conductive materials, and has corrosion resistance and anti-static properties, ensuring the stable operation of the gas storage tank in a complex chemical environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a horizontal variable volume gas storage tank of the present invention. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of a horizontal variable volume gas storage tank of the present invention. Figure 2 ;

[0017] Figure 3 The figure is a schematic diagram of the control structure of a horizontal variable volume gas storage tank of the present invention.

[0018] Among them, 1-tank body, 11-upper shell, 111-first pipe mouth, 112-second pipe mouth, 12-lower shell, 121-third pipe mouth, 122-electrically controlled discharge valve, 13-support leg, 2-gas storage telescopic inner membrane, 3-gas storage volume detection device, 31-gas level transmitter, 311-proximity switch, 312-cylinder, 313-conduction mechanism, 3131-spring, 3132-detection piece, 3133-pull rope, 314-gas level instrument, 32-pressure transmitter, 4-combustible gas sensor, 5-sound and light alarm. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] like Figure 1-3 As shown, the present invention is a horizontal variable-volume gas storage tank comprising a tank body 1 and a gas storage telescopic inner membrane 2. The tank body 1 comprises an upper shell 11, a lower shell 12, and legs 13. The upper and lower shells 11 and 12 are connected by flanges. The gas storage telescopic inner membrane 2 divides the tank body 1 into upper and lower chambers. The top of the upper shell 11 is provided with a first pipe opening 111 and a second pipe opening 112. The first pipe opening 111 is provided with a one-way air inlet valve, and the second pipe opening 112 is provided with a one-way air outlet valve. The tank body 1 is provided with a gas storage capacity detection device 3 for detecting the gas storage capacity. The bottom of the lower shell 12 is provided with a third pipe opening 121. The third pipe opening 121 is connected to an electronically controlled discharge valve 122, which is electrically connected to a PLC. The reactor and exhaust gas treatment system are both electrically connected to the PLC, which controls the operation of the reactor and exhaust gas treatment system.

[0021] The edge of the gas storage telescopic inner membrane 2 is sandwiched between the flanges of the upper and lower shells 11, 12. The flanges of the upper and lower shells 11, 12 are bolted together, and the edge of the gas storage telescopic inner membrane 2 is provided with through-holes for the bolts to pass through. The electrically controlled discharge valve 122 is a two-position, three-way valve. The third pipe port 121 is connected to the reactor and the exhaust gas treatment system respectively through the electrically controlled discharge valve 122. The valve position of the electrically controlled discharge valve 122 is controlled by a PLC. When the valve position is switched to connect the reactor and the tank body 1, the exhaust gas from the reactor enters the tank body 1 through the third pipe port 121. When the valve position is switched to connect the exhaust gas treatment system and the tank body 1, the exhaust gas in the tank body 1 is transported to the exhaust gas treatment system through the third pipe port 121.

[0022] Furthermore, the shape of the gas-storage telescopic inner membrane 2 is identical to that of the upper shell 11. When the cavity below the gas-storage telescopic inner membrane 2 is inflated, the gas-storage telescopic inner membrane 2 can swell upward until it contacts the inner wall of the upper shell 11. When the cavity below the gas-storage telescopic inner membrane 2 is deflated, the gas-storage telescopic inner membrane 2 falls into the lower shell 12 under the action of gravity.

[0023] Furthermore, the gas storage capacity detection device 3 includes a gas level transmitter 31 and a pressure transmitter 32 , and both the gas level transmitter 31 and the pressure transmitter 32 are electrically connected to the PLC.

[0024] Furthermore, the gas level transmitter 31 includes a proximity switch 311, a cylinder 312, a transmission mechanism 313 and a gas level meter 314. One end of the cylinder 312 is connected to the top of the upper shell 11, and the other end of the cylinder 312 is horizontally bent toward the side of the tank 1 and then vertically bent downward. The bottom of the downward bent section of the cylinder 312 is provided with the gas level meter 314. The bottom of the inner bottom of the downward bent section of the cylinder 312 is fixed with the proximity switch 311, and the proximity switch 311 is electrically connected to the gas level meter 314; the transmission mechanism 313 includes a spring 3131, a detection piece 313, and a detection piece 313. 132 and a pull rope 3133, the shell of the proximity switch 311 is rod-shaped, the spring 3131 is sleeved on the proximity switch 311, one end of the spring 3131 is connected to the bottom of the cylinder 312, the top of the spring 3131 is fixedly connected to the detection piece 3132, one end of the pull rope 3133 is connected to the detection piece 3132, the pull rope 3133 passes through the cylinder 312, and the other end of the pull rope 3133 extends from the top of the upper shell 11 into the tank body 1 and is connected to the gas storage telescopic inner membrane 2; the proximity switch 311 is used to detect the distance of the detection piece. A pulley is provided at the internal corner of the cylinder 312, and the pull rope 3133 is turned around the pulley; when the amount of gas between the gas storage telescopic inner membrane 2 and the lower shell 12 decreases, the gas pressure is insufficient to support the weight of the gas storage telescopic inner membrane 2, and the gas storage telescopic inner membrane 2 collapses downward, resulting in a decrease in height and pulling the pull rope 3133, causing the detection piece 3132 to move upward. The proximity switch 311 measures an increase in the distance between the detection piece 3132. When the measured distance is greater than a preset threshold, the gas under the gas outlet telescopic inner membrane 2 has been exhausted and the exhaust gas has been transported to the exhaust gas treatment system. At this time, the PLC controls the electronically controlled discharge valve 122 to stop exhausting, connecting the reactor and the tank body 1, and the exhaust gas transported by the reactor is input into the tank body 1.

[0025] Furthermore, the pressure transmitter 32 utilizes a barometric pressure sensor and is located within the lower housing 12, below the gas storage inner membrane 2. The pressure transmitter 32 is electrically connected to the PLC. The greater the amount of exhaust gas stored in the tank 1, the greater the pressure measured by the pressure transmitter 32. When the pressure measured by the pressure transmitter 32 exceeds a threshold, the PLC controls the electronically controlled discharge valve 122 to switch its position, connecting the tank 1 to the pipeline of the exhaust gas treatment system. The exhaust gas stored in the tank 1 is then transported to the exhaust gas treatment system, which is equipped with an air pump to power the exhaust gas transport.

[0026] Furthermore, a combustible gas sensor 4 is installed between the gas storage inner membrane 2 and the upper shell 11 and is electrically connected to the PLC. Exhaust gas entering the tank 1 is stored between the gas storage inner membrane 2 and the lower shell 12. If a leak occurs, the exhaust gas will leak above the gas storage inner membrane 2. If the exhaust gas contains combustible gas, a leak could pose a safety risk. The combustible gas sensor 4 installed in the upper shell 11 can detect the combustible gas leak and provide feedback to the PLC. The PLC then controls the electronically controlled exhaust valve 122 to close the air intake and simultaneously shut down the reactor.

[0027] Furthermore, an audible and visual alarm 5 is provided, which is arranged outside the tank body 1, and the combustible gas sensor 4 is electrically connected to the audible and visual alarm 5. When the combustible gas content is too high, an alarm is sounded.

[0028] Furthermore, the gas storage telescopic inner membrane 2 is made of modified polytetrafluoroethylene, which has the characteristics of acid resistance, alkali resistance and solvent resistance.

[0029] Furthermore, the gas storage and expansion inner membrane 2 is blended with conductive materials to avoid the generation and accumulation of static electricity.

[0030] The beneficial effects of a horizontal variable-volume gas storage tank of the present invention are as follows: through the gas storage telescopic inner membrane, high-flow rate and intermittent exhaust gas generated in chemical production is buffered and stored, thereby improving the effectiveness of exhaust gas treatment and reducing the pollution of exhaust gas to the environment; the gas storage tank is equipped with equipment such as a gas level transmitter and a pressure transmitter, which can realize real-time monitoring of the gas storage volume and pressure, reduce the start-stop frequency of the exhaust gas treatment system, reduce energy consumption, and thus reduce equipment maintenance and operating costs; combined with a combustible gas sensor, it can ensure the safety of the use process; the gas storage telescopic inner membrane is made of modified polytetrafluoroethylene and blended with conductive materials, and has corrosion resistance and anti-static properties, ensuring the stable operation of the gas storage tank in a complex chemical environment.

[0031] The present invention and its embodiments are described above. This description is not restrictive. What is shown in the accompanying drawings is only one of the embodiments of the present invention. The actual structure is not limited to this. In short, if ordinary technicians in this field are inspired by it and do not depart from the purpose of the invention, they can creatively design structural methods and embodiments similar to the technical solution, which should all fall within the scope of protection of the present invention.

Claims

1. A horizontal variable volume gas storage tank, characterized by: The invention comprises a tank body (1) and a gas storage telescopic inner membrane (2); the tank body (1) comprises an upper shell (11), a lower shell (12) and a support leg (13); the upper shell (11) and the lower shell (12) are connected by a flange; the gas storage telescopic inner membrane (2) is arranged inside the tank body (1); the gas storage telescopic inner membrane (2) divides the tank body (1) into two upper and lower cavities; the top of the upper shell (11) is provided with a first pipe opening (111) and a second pipe opening (112); the first pipe opening (111) is provided with a one-way air inlet valve; the second pipe opening (112) is provided with a one-way air outlet valve; the tank body (1) is provided with a gas storage amount detection device (3) for detecting the gas storage amount; the bottom of the lower shell (12) is provided with a third pipe opening (121); the third pipe opening (121) is connected to an electrically controlled discharge valve (122); and the electrically controlled discharge valve (122) is electrically connected to a PLC.

2. A horizontal variable volume gas storage tank according to claim 1, characterized in that: The shape of the gas storage telescopic inner membrane (2) is the same as that of the upper shell (11).

3. A horizontal variable volume gas storage tank according to claim 2, characterized in that: The gas storage capacity detection device (3) comprises a gas level transmitter (31) and a pressure transmitter (32), and both the gas level transmitter (31) and the pressure transmitter (32) are electrically connected to a PLC.

4. A horizontal variable volume gas storage tank according to claim 3, characterized in that: The gas level transmitter (31) comprises a proximity switch (311), a cylinder (312), a conducting mechanism (313) and a gas level meter (314); one end of the cylinder (312) is connected to the top of the upper shell (11); the other end of the cylinder (312) is horizontally bent toward one side of the tank (1) and then vertically bent downward; the bottom of the downwardly bent section of the cylinder (312) is provided with the gas level meter (314); the bottom of the interior of the downwardly bent section of the cylinder (312) is fixed with the proximity switch (311); the proximity switch (311) is electrically connected to the gas level meter (314); the conducting mechanism (313) comprises a spring (3131), a detection piece (3131) and a contact member (3132). 2) and a pull rope (3133), the housing of the proximity switch (311) is rod-shaped, the spring (3131) is sleeved on the proximity switch (311), one end of the spring (3131) is connected to the bottom of the cylinder (312), the top of the spring (3131) is fixedly connected to the detection piece (3132), one end of the pull rope (3133) is connected to the detection piece (3132), the pull rope (3133) passes through the cylinder (312), and the other end of the pull rope (3133) extends from the top of the upper shell (11) into the tank body (1) and is connected to the gas storage telescopic inner membrane (2); the proximity switch (311) is used to detect the distance of the detection piece.

5. The horizontal variable volume gas storage tank according to claim 3, characterized in that: The pressure transmitter (32) adopts an air pressure sensor. The pressure transmitter (32) is arranged in the lower shell (12). The pressure transmitter (32) is electrically connected to the PLC.

6. The horizontal variable volume gas storage tank according to claim 1, characterized in that: A combustible gas sensor (4) is provided between the gas storage telescopic inner membrane (2) and the upper shell (11), and the combustible gas sensor (4) is electrically connected to the PLC.

7. The horizontal variable volume gas storage tank according to claim 6, characterized in that: An audible and visual alarm (5) is also provided. The audible and visual alarm (5) is provided outside the tank body (1), and the combustible gas sensor (4) is electrically connected to the audible and visual alarm (5).

8. The horizontal variable volume gas storage tank according to claim 1, characterized in that: The gas storage telescopic inner membrane (2) is made of modified polytetrafluoroethylene.

9. The horizontal variable volume gas storage tank according to claim 8, characterized in that: The gas storage telescopic inner membrane (2) is blended with a conductive material.

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