Air storage pressure regulating type anaerobic closed water tank

Abstract

The utility model discloses an air storage pressure regulating type oxygen-free closed water tank, which belongs to the technical field of water tank containers, and comprises a closed water tank body and an internal floating cover, and the floating cover divides the water tank into a lower water chamber and an upper air chamber; the bottom of the water chamber is provided with a water inlet, a water outlet and a drain outlet, the air chamber is connected with an air storage device, and the air storage device is provided with an inflation inlet, an exhaust valve, a pressure gauge and an interlocking adjusting valve. When the water tank is full of water, the gas storage device is filled with gas (such as nitrogen), and initial pressure is set according to volume and water level. When the water level drops, the gas storage device supplements gas to the gas chamber to maintain positive pressure to avoid vacuum; when the water level rises, gas is pressed back to the gas storage device, and the regulating valve automatically exhausts gas when overpressure occurs. Through a closed structure and dynamic air pressure adjustment, oxygen contact is isolated, and normal water pumping of the water pump is ensured. And a liquid level meter, a safety valve and a stop valve are additionally arranged, so that safety and controllability are improved. The design has double advantages of oxygen-free storage and stable water supply, and is suitable for water treatment scenes such as a boiler system requiring strict oxygen control.

Description

Technical Field

[0001] This utility model belongs to the field of water tank container technology, and relates to a gas storage and pressure regulating oxygen-free closed water tank. Background Technology

[0002] To prevent dissolved oxygen in boiler system water from corroding boiler equipment and pipes, boiler feedwater is typically deoxygenated. Compared to traditional thermal and chemical deoxygenation methods, hollow fiber membrane deoxygenation has gained widespread use due to its advantages such as system simplicity, small footprint, and operation at ambient temperature. The deoxygenated water after hollow fiber membrane deoxygenation must be stored in a sealed tank to prevent contact with oxygen and subsequent increase in dissolved oxygen. However, using a sealed tank presents another problem: as the feedwater pump draws deoxygenated water from the tank, a vacuum forms at the top of the sealed tank as the water level decreases, preventing the pump from drawing the deoxygenated water out. Current solutions involve using an open tank (with an opening at the top connecting to the atmosphere) and installing a float cover or float ball on the water surface to isolate it from air. However, because the float cover or float ball is not permanently sealed to the tank wall, gaps exist, allowing oxygen from the air to still enter the water. Therefore, it is necessary to design a new water tank device and system that can completely isolate the contact between air and water, without creating a vacuum and without affecting the water pump's pumping function. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a gas-storage, pressure-regulating, oxygen-free, sealed water tank, which completely isolates the stored oxygen-free water from the air, preventing oxygen from the air from entering the water. Furthermore, a gas storage device is installed, and when the tank is full, it is filled with gas at a certain initial pressure. When external water is used, as the water level drops, the gas from the gas storage device enters the upper space of the tank, and the gas pressure in the storage device begins to decrease. However, as long as the initial pressure is appropriate, even if the water level drops to its lowest point, the inside of the tank will remain under positive pressure, thus preventing a vacuum from forming inside the tank and affecting the water pump's pumping operation.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An oxygen-free closed water tank with gas storage and pressure regulation includes a closed tank body and a floating cover slidably disposed within the tank body. The floating cover divides the tank body into a water chamber and an air chamber. The water chamber is located below the floating cover, and the air chamber is located above the floating cover. The bottom of the water chamber is provided with an inlet, an outlet, and a drain outlet to ensure maximum static pressure at the outlet and to drain all water when cleaning the tank. The inlet is used to connect to oxygen-free water, and the outlet is used to connect to a water supply pump. An air storage device is provided above the air chamber and communicates with it. The air storage device is provided with an air inlet and an air outlet.

[0006] When the water level in the water chamber rises, the float rises, and the gas in the gas chamber is forced into the gas storage device; when the water level in the water chamber falls, the float falls, and the gas in the gas storage device enters the gas chamber.

[0007] Furthermore, the water tank body is also equipped with a water tank level gauge.

[0008] Furthermore, the gas storage device is also equipped with a pressure gauge.

[0009] Furthermore, a regulating valve is installed on the connecting pipe of the air inlet, which is interlocked with the pressure gauge. Once the water tank is full, the air storage device can be inflated. The inflated gas is generally nitrogen, but other water-insoluble gases can also be used. The initial inflation pressure of the air storage device is flexibly adjusted according to the volume of the water tank and the water level. When the water level decreases, gas from the air storage device enters the upper space of the water tank, and the gas pressure in the air storage device begins to decrease. When the water level rises, gas in the upper space of the water tank is forced into the air storage device, and the gas pressure in the air storage device begins to increase. When the pressure in the air storage device exceeds the set pressure, the regulating valve automatically opens; when the pressure in the air storage device falls below the set pressure, the regulating valve automatically closes.

[0010] Furthermore, a safety valve is provided on the top of the gas storage device as an overpressure protection device.

[0011] Furthermore, the inlet, outlet, drain, air inlet, and exhaust valve are all equipped with shut-off valves.

[0012] The beneficial effects of this utility model are as follows:

[0013] This invention employs a closed water tank design, completely isolating the stored oxygen-free water from air and preventing oxygen from entering the water. Furthermore, a gas storage device is incorporated, which is filled with gas at a certain initial pressure when the tank is full. When external water is used, as the water level drops, the gas from the storage device enters the upper space of the tank, causing the gas pressure in the storage device to decrease. However, as long as the initial pressure is appropriate, even when the water level drops to its lowest point, a positive pressure is maintained inside the tank, thus preventing a vacuum from forming inside the tank and affecting the water pump's pumping operation.

[0014] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0016] Figure 1 This is a schematic diagram of the gas-storage pressure-regulating oxygen-free closed water tank of this utility model.

[0017] Attached reference numerals: 1-Water tank body; 2-Float cover; 3-Water tank level gauge; 4-Inlet; 5-Outlet; 6-Drain outlet; 7-Air storage device; 8-Air inlet; 9-Air outlet; 10-Regulating valve; 11-Safety valve; 12-Shut-off valve; 13-Pressure gauge. Detailed Implementation

[0018] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0019] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0020] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0021] Please see Figure 1This is a gas-storage, pressure-regulating, oxygen-free, closed water tank, comprising a closed tank body 1 and a floating cover 2 slidably disposed within the tank body 1. The floating cover 2 divides the tank body 1 into a water chamber and an air chamber, with the water chamber located below the floating cover 2 and the air chamber located above the floating cover 2. The bottom of the water chamber is provided with an inlet 4, an outlet 5, and a drain outlet 6 to ensure maximum static pressure at the outlet and to drain all water during tank cleaning. The inlet 4 is used to connect to oxygen-free water, and the outlet 5 is used to connect to a water supply pump. An air storage device 7 is provided above the air chamber and is connected to it. The air storage device 7 is provided with an air inlet 8 and an air outlet 9, and an air vent valve is installed on the air outlet 9. When the water level in the water chamber rises, the floating cover 2 rises, and the gas in the air chamber is forced into the air storage device 7. When the water level in the water chamber drops, the floating cover 2 falls, and the gas in the air storage device 7 enters the air chamber.

[0022] The water tank body 1 is equipped with a water level gauge 3, and the gas storage device 7 is equipped with a pressure gauge 13. A regulating valve 10 is installed on the connecting pipe of the air filling port 8, and this regulating valve 10 is interlocked with the pressure gauge 13. Once the water tank is full, the gas storage device 7 can be filled with gas. Nitrogen is generally used, but other gases insoluble in water can also be used. The initial filling pressure of the gas storage device 7 is flexibly adjusted according to the volume of the water tank and the water level. When the water level decreases, gas from the gas storage device 7 enters the upper space of the water tank, and the gas pressure in the gas storage device 7 begins to decrease. When the water level rises, gas in the upper space of the water tank is forced into the gas storage device 7, and the gas pressure in the gas storage device 7 begins to increase. When the pressure in the gas storage device 7 exceeds the set pressure, the regulating valve 10 automatically opens; when the pressure in the gas storage device 7 falls below the set pressure, the regulating valve 10 automatically closes.

[0023] A safety valve 11 is installed on the top of the gas storage device 7 as an overpressure protection device. Shut-off valves 12 are installed on the water inlet 4, water outlet 5, sewage outlet 6, air inlet 8, and air vent valve.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A gas-storage, pressure-regulating, oxygen-free, closed water tank, comprising a closed tank body and a floating cover slidably disposed within the tank body, characterized in that: The floating cover divides the water tank body into a water chamber and an air chamber. The water chamber is located on the lower side of the floating cover, and the air chamber is located on the upper side of the floating cover. The bottom of the water chamber is provided with an inlet, an outlet, and a drain outlet. The inlet is used to connect to oxygen-free water, and the outlet is used to connect to a water supply pump. An air storage device is provided above the air chamber and is connected to it. The air storage device is provided with an air filling port and an air venting valve. When the water level in the water chamber rises, the float rises, and the gas in the gas chamber is forced into the gas storage device; when the water level in the water chamber falls, the float falls, and the gas in the gas storage device enters the gas chamber.

2. The gas-storage, pressure-regulating, oxygen-free, closed water tank according to claim 1, characterized in that: The water tank body is also equipped with a water tank level gauge.

3. The gas-storage, pressure-regulating, oxygen-free, closed water tank according to claim 1, characterized in that: The gas storage device is also equipped with a pressure gauge.

4. The gas-storage, pressure-regulating, oxygen-free, closed water tank according to claim 3, characterized in that: A regulating valve is installed on the connecting pipe of the air inlet, and the regulating valve is interlocked with the pressure gauge.

5. The gas-storage, pressure-regulating, oxygen-free, closed water tank according to claim 1, characterized in that: The gas storage device is equipped with a safety valve at the top as an overpressure protection device.

6. The gas-storage, pressure-regulating, oxygen-free, closed water tank according to claim 1, characterized in that: The inlet, outlet, drain, air inlet, and exhaust valve are all equipped with shut-off valves.

7. The gas-storage, pressure-regulating, oxygen-free, closed water tank according to claim 1, characterized in that: The gas supplied to the gas storage device is nitrogen or other gases that are insoluble in water.

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