Anti-freezing biogas water-sealed tank for alpine regions

Abstract

The utility model relates to an anti-freezing methane water-sealed tank for alpine regions. A gas outlet connector is arranged at the top of a tank body, a gas inlet pipe is arranged on the tank body, a gas inlet connector at the top of the gas inlet pipe extends out of the top of the tank body, a gas port at the bottom is positioned at the lower part of the tank body, and a pressure balance connector at the top of the tank body is connected with a gas release pipe through a safety valve; the tank body is provided with a connector of a water vapor supplementing pipe extending out of the tank body and connected with a water supplementing pipe and a steam pipe through a three-way valve; the lower part of the water vapor supplementing pipe is provided with an orifice; a drain pipe is arranged on the tank body, a drain valve is arranged on a water outlet interface of the drain pipe, an upper liquid level meter interface is arranged at the upper part of the side wall of the tank body, a lower liquid level meter interface is arranged at the lower part of the side wall of the tank body, and liquid level meters are arranged on the upper liquid level meter interface and the lower liquid level meter interface; and a thermometer is mounted at a thermometer interface arranged at the lower part of the tank body. According to the utility model, the condition that the water seal of the methane water-sealed tank in the alpine region is frozen under the weather such as low-temperature freezing is effectively avoided, and the safe and stable operation of the water-sealed tank can be ensured.

Description

Technical Field

[0001] The utility model relates to an antifreeze type biogas water sealing tank for high-cold areas, belonging to the technical field of wastewater anaerobic treatment. Background Art

[0002] Anaerobic digestion is a common high-concentration wastewater treatment technology, widely used in industries such as municipal administration, power generation, chemical engineering, metallurgy, and petroleum. The biogas produced by anaerobic digestion of wastewater is a renewable energy source. After pretreatment and purification, it can be used as fuel for boilers and power generation equipment, and can also be used to purify biogas.

[0003] The function of a biogas water seal tank is to prevent flames from entering equipment, containers, or pipelines when a fire breaks out on one side, and to stop the flames from spreading to the other side. Typically installed between the gas pipeline and the equipment, the biogas water seal tank is a crucial and essential safety device in biogas purification and utilization systems.

[0004] Since the pressure of the biogas in the tank changes with the rate of biogas production, the air pressure at the biogas outlet will also change accordingly, causing the air pressure at the biogas outlet to be unstable. For this reason, when the biogas pressure exceeds the predetermined low and high values, the existing biogas water seal tank is drained to achieve overpressure drainage and pressure relief, and when the air pressure in the tank is lower than the predetermined low value, water is injected into the tank to maintain the air pressure in the tank within a certain range by controlling the water level in the tank. Although the existing biogas water seal tank automatically relieves pressure by controlling the water level in the tank, when the pressure in the tank exceeds the limit, the water seal cannot be quickly relieved, and in low temperature and freezing weather, the water seal will freeze, which will cause the biogas water seal tank to fail. Therefore, there is a problem of biogas leakage, which makes the water seal tank unable to achieve safe and stable operation. Summary of the Invention

[0005] The purpose of the utility model is to provide an antifreeze type biogas water seal tank for use in high-altitude cold areas, which can automatically replenish water or steam for the biogas water seal tank according to the real-time temperature and liquid level during operation, thereby effectively avoiding the situation where the water seal of the biogas water seal tank in high-altitude cold areas freezes in low-temperature freezing weather, and can ensure the safe and stable operation of the water seal tank.

[0006] The technical solution for achieving the above-mentioned purpose is: an anti-freeze type biogas water seal tank for high-altitude cold areas, characterized in that: it includes a sealed tank body, the top of the tank body is provided with an air outlet interface, the tank body is provided with an air inlet pipe, the air inlet interface on the top of the inlet pipe extends out of the top of the tank body, and the air outlet at the bottom is located at the lower part of the tank body, the pressure balance interface provided on the top of the tank body is connected to the deflation pipe through a safety valve; the tank body is provided with a water supply steam pipe, and the interface of the water supply steam pipe extending out of the tank body is connected to the water supply pipe and the steam pipe through a three-way valve, and the lower part of the water supply steam pipe is provided with an orifice; the tank body is provided with a drain pipe, and the water inlet of the drain pipe is located at the lower part of the tank body, and the water outlet interface extends out of the middle of the tank body, and a drain valve is installed on the water outlet interface of the drain pipe; the tank body is provided with an upper liquid level gauge interface on the upper part of the side wall and a lower liquid level gauge interface at the lower part, and the liquid level gauge is installed on the upper liquid level gauge interface and the lower liquid level gauge interface; the thermometer interface provided at the lower part of the tank body is provided with a thermometer.

[0007] The present invention is an antifreeze-type biogas water seal tank for use in high-altitude cold regions. A safety valve is installed at the pressure balance interface on the top of the tank body. The pressure inside the tank body can be quickly and timely adjusted according to the working pressure inside the tank body to ensure that the pressure inside and outside the tank body is balanced, thereby ensuring the safe operation of the biogas water seal tank pipe. The present invention adopts upper and lower liquid level gauge interfaces and is equipped with a liquid level gauge. Under normal operating temperature, when the liquid level is lower than the warning value, water will be replenished through the water supply steam pipe, and when the water level in the tank body exceeds the high liquid level, water will be drained through the drain pipe to ensure that the water seal height in the tank body is within the normal operating range. The water supply steam pipe of the present invention is connected to the water supply pipe and the steam pipe through a three-way valve, so it can be switched according to the working environment to meet the different needs of water supply and steam introduction in the tank body. When the operating temperature of the biogas water seal tank is lower than the warning value, steam is introduced through the water supply steam pipe, effectively avoiding the problem of water seal freezing and biogas leakage in biogas water seal tanks in high-altitude cold regions under low temperature freezing weather, thereby ensuring the safe and stable operation of the water seal tank and ensuring the effectiveness of the water seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0009] Figure 1 The utility model is a structural schematic diagram of an antifreeze type biogas water seal tank used in high-cold areas.

[0010] Figure 2 yes Figure 1 AA cross-sectional structure diagram.

[0011] Figure 3 yes Figure 1 Schematic diagram of the BB cross-section structure.

[0012] Among them, 1—tank body, 1-1—upper liquid level gauge interface, 1-2—air outlet interface, 1-3—pressure balance interface, 1-4—thermometer interface, 1-5—emptying interface, 1-6—lower liquid level gauge interface, 2—three-way valve, 3—liquid level gauge, 4—water supply steam pipe, 4-1—horizontal pipe, 5—drain pipe, 6—drain valve, 7—safety valve, 8—thermometer, 9—inlet pipe, 10—emptying valve. DETAILED DESCRIPTION

[0013] See Figures 1 to 3 As shown, the utility model is an antifreeze type biogas water seal tank for use in high-altitude cold areas, including a sealed tank body 1. The tank body 1 can be made of high-quality stainless steel, which can effectively prevent equipment corrosion and extend its service life. The utility model tank body 1 is provided with an air outlet interface 1-2 on the top, and an air inlet pipe 9 on the tank body 1. The air inlet interface at the top of the air inlet pipe 9 extends out from the top of the tank body 1, and the air outlet at the bottom is located at the bottom of the tank body 1. Therefore, biogas enters the tank body 1 from the air inlet pipe 9 through the biogas transmission pipeline, and is connected to the biogas transmission pipeline from the top air outlet interface 1-2. Since the air outlet at the bottom of the air inlet pipe 9 is below the liquid level, the function of blocking flames is achieved through the biogas water seal tank.

[0014] See Figures 1 to 3 As shown, the air inlet interface and the air outlet interface 1-2 of the air inlet pipe 9 of the present invention are flange connection plates, which facilitate the quick connection and installation of the air inlet pipe 9 and the air outlet interface 1-2 on the biogas water seal tank with the biogas transmission pipeline.

[0015] See Figures 1 to 3 As shown, the pressure balance interface 1-3 provided on the top of the tank body 1 of the utility model is connected to the vent pipe through the safety valve 7. The safety valve 7 adopts a one-way pressure valve. When the pressure in the tank body 1 exceeds the set value, the safety valve 7 opens to discharge the biogas in the tank body 1 into the vent pipe, and the biogas is discharged to the boiler or power generation device through the vent pipe. The working pressure inside the tank body 1 is quickly and timely adjusted to ensure the pressure balance inside and outside the tank body 1, so that the biogas water seal tank can operate safely and reliably, and the air pressure at the biogas outlet is stable.

[0016] See Figures 1 to 3 As shown, the utility model is provided with a water supply steam pipe 4 on the tank body 1, and the interface of the water supply steam pipe 4 extending out of the tank body 1 is connected to the water supply pipe and the steam pipe respectively through the three-way valve 2, and the lower part of the water supply steam pipe 4 is provided with an orifice, so the three-way valve 2 can be switched as needed, and water is supplied to the tank through the water supply steam pipe 4 to ensure that the water seal height is within a normal range. When the temperature is lower than the warning value, the three-way valve 2 is switched to a steam flow state, and steam is introduced into the tank through the water supply steam pipe 4, and the steam is sent into the tank body 1 through the orifice, so as to realize mass and heat transfer between the water seal and the steam, prevent the water seal from freezing due to low temperature, and thus cause the biogas water seal tank to fail, and can meet different needs.

[0017] See Figures 1 to 3As shown, the water supply steam pipe 4 of the utility model is L-shaped and extends from the top of the tank body 1 into the tank body 1. A plurality of holes are evenly distributed on the wall of the horizontal tube 4-1 at the bottom of the water supply steam pipe 4. The water supply or steam is quickly and evenly delivered into the tank body 1 through the multiple holes, thereby realizing efficient mass transfer and heat transfer between the water seal and the steam. The end face of the horizontal tube 4-1 of the water supply steam pipe 4 exceeds the center plane of the tank body 1, thereby increasing the injection and heating area.

[0018] See Figures 1 to 3 As shown, the tank body 1 of the present invention is provided with a drain pipe 5, and the water inlet of the drain pipe 5 is located at the lower part of the tank body 1, and the water outlet interface extends out of the middle part of the tank body 1. A drain valve 6 is installed on the water outlet interface of the drain pipe 5. After water is replenished or steam is introduced, the liquid level in the tank body 1 rises and exceeds the maximum liquid level. The drain valve 6 is opened to discharge the water in the tank body 1 through the drain pipe 5 to ensure that the water seal height in the tank body 1 is within the normal working range.

[0019] See Figures 1 to 3 As shown, the tank body 1 of the present invention is provided with an upper liquid level gauge interface 1-1 on the upper part of the side wall and a lower liquid level gauge interface 1-6 on the lower part. The liquid level gauge 3 is installed on the upper liquid level gauge interface 1-1 and the lower liquid level gauge interface 1-6. The liquid level gauge 3 can display the liquid level position in the tank body 1. At the normal operating temperature, when the liquid level is lower than the warning value, the three-way valve 2 can be started and switched to the water replenishment state. Water is replenished into the tank through the water replenishment steam pipe 4, and the water seal height is within the normal operating range.

[0020] See Figures 1 to 3 As shown, the thermometer interface 1-4 provided at the lower part of the tank body 1 of the utility model is installed with a thermometer 8, which displays the temperature inside the tank on site through the thermometer 8. When the operating temperature of the biogas water seal tank is lower than the warning value, the three-way valve 2 is started and switched to the steam state, and steam is introduced into the tank body 1 to solve the problem of biogas leakage caused by freezing of the water seal of the biogas water seal tank and ensure the effectiveness of the water seal.

[0021] See Figures 1 to 3 As shown, the side wall of the tank body 1 of the utility model is located below the lower liquid level gauge interface 1-6 and is further provided with an emptying interface 1-5, and an emptying valve 10 is installed on the emptying interface 1-5. When the biogas water seal tank is regularly maintained and repaired, the emptying valve 10 can be opened to quickly empty the tank body 1, saving maintenance and repair time.

[0022] See Figures 1 to 3 As shown, the water inlet plane of the drainage pipe 5 of the utility model is higher than the highest plane of the thermometer interface 1-4, and the center horizontal plane of the thermometer interface 1-4 is higher than the center horizontal plane of the lower liquid level gauge interface 1-6. The water temperature of the tank body 1 is accurately measured through the position of the thermometer interface 1-4, further improving its working reliability.

Claims

1. A freeze-proof biogas water seal tank for use in cold regions, characterized by: The invention comprises a sealed tank body (1), wherein the top of the tank body (1) is provided with an air outlet interface (1-2), the tank body (1) is provided with an air inlet pipe (9), the air inlet interface at the top of the air inlet pipe (9) extends out of the top of the tank body (1), and the air outlet at the bottom is located at the lower part of the tank body (1), the pressure balance interface (1-3) provided at the top of the tank body (1) is connected to the air release pipe through a safety valve (7); the tank body (1) is provided with a water supply steam pipe (4), and the interface of the water supply steam pipe (4) extending out of the tank body (1) is connected to the water supply pipe and the steam pipe through a three-way valve (2), and the lower part of the water supply steam pipe (4) is provided with a water supply steam pipe (4). An orifice is provided; a drain pipe (5) is provided on the tank body (1), and the water inlet of the drain pipe (5) is located at the lower part of the tank body (1), and the water outlet interface extends out of the middle part of the tank body (1); a drain valve (6) is installed on the water outlet interface of the drain pipe (5); an upper liquid level gauge interface (1-1) is provided on the upper part of the side wall of the tank body (1), and a lower liquid level gauge interface (1-6) is provided on the lower part, and the liquid level gauge (3) is installed on the upper liquid level gauge interface (1-1) and the lower liquid level gauge interface (1-6); a thermometer interface (1-4) provided at the lower part of the tank body (1) is installed with a thermometer (8).

2. The antifreeze type biogas water seal tank for use in cold regions according to claim 1, characterized in that: The side wall of the tank body (1) is further provided with an emptying interface (1-5) below the lower liquid level gauge interface (1-6), and an emptying valve (10) is installed on the emptying interface (1-5).

3. The antifreeze type biogas water seal tank for use in cold regions according to claim 1, characterized in that: The water supply steam pipe (4) is L-shaped and extends from the top of the tank body (1) into the tank body (1). A plurality of openings are evenly distributed on the horizontal pipe wall at the bottom of the water supply steam pipe (4).

4. The antifreeze type biogas water seal tank for use in cold regions according to claim 1 or 3, characterized in that: The end surface of the horizontal pipe of the water supply steam pipe (4) exceeds the central plane of the tank body (1).

5. The antifreeze type biogas water seal tank for use in cold regions according to claim 1, characterized in that: The air inlet interface and the air outlet interface (1-2) of the air inlet pipe (9) are flange connection plates.

6. The antifreeze type biogas water seal tank for use in cold regions according to claim 1, characterized in that: The water inlet plane of the drain pipe (5) is higher than the highest plane of the thermometer interface (1-4), and the center horizontal plane of the thermometer interface (1-4) is higher than the center horizontal plane of the lower liquid level gauge interface (1-6).

Images