Vertical expansion steam storage tank

Abstract

The utility model discloses a vertical expansion steam storage tank which comprises a steam storage tank, an outer heat preservation tank and a steam supplementing tank, the outer heat preservation tank is sleeved outside the steam storage tank, a steam inlet pipe is connected to the side wall of the upper half portion of the steam storage tank, a steam exhaust pipe is arranged at the top of the steam storage tank, and a condensate water return pipe is arranged at the position, close to the bottom, of the steam storage tank. Three pressure release valves are arranged on the side wall, close to the top, of the steam storage tank, a water drainage pipe is arranged at the bottom of the steam supplementing tank, electromagnetic valves are arranged in the positions, close to the steam storage tank, of the steam inlet pipe, the steam exhaust pipe, the condensate water return pipe and the steam supplementing pipe, and a heater is arranged in the position, close to the bottom, of the steam supplementing tank. Pressure is released through the three pressure release valves, so that the stability of the steam storage tank is guaranteed, after a certain amount of condensate water is accumulated in the steam storage tank, the water flows into the steam supplementing tank, the condensate water is discharged, the water in the steam supplementing tank is heated, and formed steam enters the steam storage tank from the steam supplementing pipeline to supplement pressure.

Description

Technical Field

[0001] This utility model relates to the field of steam storage tank technology, and in particular to a vertical expansion steam storage tank. Background Technology

[0002] A vertical expansion steam storage tank is a pressure vessel used for storing and regulating steam. The steam storage tank includes a container body with an air inlet. The air inlet is equipped with a connecting pipe and flange, which connects to a boiler via a connecting pipeline. Steam generated by the boiler after heating enters the steam storage tank through the connecting pipe at the air inlet for storage or buffering. After entering the steam storage tank, steam condenses. The accumulation of condensate inside the tank affects the amount of steam stored, and drainage is relatively difficult, potentially leading to steam leakage. Sometimes, when steam is not replenished into the tank, the steam pressure decreases, resulting in insufficient steam. If steam cannot be replenished in time, the steam in the tank cannot meet the requirements for external steam discharge, affecting steam supply conditions. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in related technologies. Therefore, one objective of this utility model is to provide a vertical expansion steam storage tank that solves problems such as the inconvenience of handling condensate in the steam tank and insufficient steam pressure inside the steam tank, thus failing to meet steam supply requirements.

[0004] A vertical expansion steam storage tank according to this utility model includes a steam storage tank, an outer insulation tank, and a steam replenishment tank. The steam storage tank is fitted with an outer insulation tank, and a 5-10cm gap is left between the outer wall of the steam storage tank and the inner wall of the outer insulation tank. Air is evacuated from this gap to create a vacuum. A steam inlet pipe is connected to the upper side wall of the steam storage tank, and a steam outlet pipe is provided at the top of the steam storage tank. A condensate return pipe is provided near the bottom of the steam storage tank. The steam inlet pipe, steam outlet pipe, and condensate return pipe all penetrate the outer insulation tank to the outside. The condensate return pipe is connected to the middle of the lower half of the steam replenishment tank. The steam storage tank is located near the top... The steam storage tank has three pressure relief valves on its side wall. Electronic barometers and electronic thermometers are installed on the side wall near the top and middle of the steam storage tank, respectively. A first water level gauge is installed near the bottom of the steam storage tank. A steam replenishment pipe is installed at the top of the steam replenishment tank and connects to the upper part of the steam storage tank. A drain pipe with a solenoid valve is installed at the bottom of the steam replenishment tank. Solenoid valves are installed near the steam storage tank on the steam inlet pipe, steam outlet pipe, condensate return pipe, and steam replenishment pipe. A heater is installed near the bottom of the steam replenishment tank. A second water level gauge is installed on the side wall of the steam replenishment tank at the height where it connects to the condensate return pipe.

[0005] In some embodiments of this utility model, the gap between the outer wall of the steam storage tank and the inner wall of the outer insulation tank is filled with insulating glass rock wool board.

[0006] In some other embodiments of this utility model, the exhaust pipe gradually tapers outward from the steam storage tank location, while keeping the inner diameter of the exhaust pipe constant. The inner diameter of the exhaust pipe at the steam storage tank location is 1.5-2.0 times that of the exhaust pipe at the location where it remains unchanged.

[0007] In some other embodiments of this utility model, the three pressure relief valves are three pressure relief valves with gradually increasing pressure relief.

[0008] In some other embodiments of this utility model, the middle position of the steam replenishment tank is not higher than the bottom position of the steam storage tank.

[0009] In some other embodiments of this utility model, the outer wall of the gas replenishment tank is wrapped with a heat insulation layer.

[0010] In this invention, during the process of supplying steam to the steam storage tank, if the pressure is too high, the pressure is released through three pressure relief valves to ensure the stability of the steam storage tank. When a certain amount of condensate accumulates in the steam storage tank, the water will flow into the steam replenishment tank. If the water accumulated in the steam replenishment tank exceeds a certain amount, it will be discharged (not completely discharged). When the steam pressure in the steam storage tank becomes low and cannot meet the steam supply requirements, the water in the steam replenishment tank is heated to form steam that enters the steam storage tank through the steam replenishment pipe to replenish the pressure, so that the pressure in the steam storage tank meets the requirements. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This is a structural schematic diagram of a vertical expansion steam storage tank proposed in this utility model.

[0013] Figure 2 This is a cross-sectional structural diagram of a vertical expansion steam storage tank proposed in this utility model.

[0014] In the diagram, 1 is the steam inlet pipe; 2 is the steam outlet pipe; 3 is the pressure relief valve; 4 is the external insulation tank; 40 is the condensate return pipe; 41 is the first water level gauge; 42 is the electronic barometer; 43 is the electronic thermometer; 5 is the make-up steam tank; 51 is the second water level gauge; 52 is the drain pipe; 53 is the make-up steam pipe; and 6 is the steam storage tank. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0017] Reference Figure 1-2 A vertical expansion steam storage tank includes a steam storage tank 6, an outer insulation tank 4, and a make-up steam tank 5. The steam storage tank 6 is fitted with an outer insulation tank 4. A 5-10cm gap is left between the outer wall of the steam storage tank 6 and the inner wall of the outer insulation tank 4. The air in the gap is evacuated to create a vacuum. A steam inlet pipe 1 is connected to the upper half of the side wall of the steam storage tank 6. A steam exhaust pipe 2 is provided at the top of the steam storage tank 6. A condensate return pipe 40 is provided near the bottom of the steam storage tank 6. The steam inlet pipe 1, the steam exhaust pipe 2, and the condensate return pipe 40 all pass through the outer insulation tank 4 to the outside. The condensate return pipe 40 is connected to the middle of the lower half of the make-up steam tank 5. Three pressure relief valves are provided on the side wall near the top of the steam storage tank 6. Valve 3; the steam storage tank 6 is equipped with an electronic barometer 42 and an electronic thermometer 43 on the side wall near the top and middle positions respectively; the steam storage tank 6 is equipped with a first water level gauge 41 near the bottom; the steam replenishment tank 5 is equipped with a steam replenishment pipe 53 at the top and the steam replenishment pipe 53 is connected to the upper half of the steam storage tank 6; the steam replenishment tank 5 is equipped with a drain pipe 52 at the bottom and a solenoid valve is installed in the drain pipe 52; the steam inlet pipe 1, the steam outlet pipe 2, the condensate return pipe 40 and the steam replenishment pipe 53 are all equipped with solenoid valves near the steam storage tank 6; a heater is installed near the bottom of the steam replenishment tank 5; and a second water level gauge 51 is installed on the side wall of the steam replenishment tank 5 at the height of the connection with the condensate return pipe 40.

[0018] Steam generated by boilers, etc., is discharged after being filtered to remove impurities. Direct discharge to the outside would result in energy loss. Steam is discharged through a pipe into the steam inlet pipe 1 and then into the steam storage tank 6 for storage. After a certain amount is stored, if the pressure exceeds the requirement, the pressure relief valve 3 will be activated to release the pressure. The pressure relief valve 3 is like a pressure cooker releasing pressure. When the pressure exceeds a certain value, steam will be discharged.

[0019] When no steam is supplied to steam storage tank 6, the pressure inside steam storage tank 6 will slowly decrease, condensate will increase, and the gas pressure will gradually fall below the steam supply requirements. When the condensate accumulates to a certain amount, the first water level gauge detects this and simultaneously opens the solenoid valves in the condensate return pipe 40 and the steam supply pipe 53, allowing the condensate to flow back into the steam supply tank 5 (generally, the return flow is open for 1-2 minutes). Then, the solenoid valves in the condensate return pipe 40 and the steam supply pipe 53 are closed. If the gas pressure in steam storage tank 6 becomes too low to meet the steam supply requirements, the condensate in the steam supply tank 5 is heated to generate steam. The solenoid valve in the steam supply pipe 53 is then opened, and the steam is discharged into steam storage tank 6. When the pressure meets the requirements, heating is stopped, and the solenoid valve in the steam supply pipe 53 is closed. This achieves the purpose of pressurization.

[0020] The air inside the gap forms a vacuum, resulting in good heat preservation.

[0021] The gap between the outer wall of the steam storage tank 6 and the inner wall of the outer insulation tank 4 is filled with insulating glass rock wool board.

[0022] The added insulation of the glass wool panels allows for a certain level of insulation even with air leakage, without affecting the steam supply.

[0023] The exhaust pipe 2 gradually tapers outwards from the steam storage tank 6, while maintaining a constant inner diameter. The inner diameter of the exhaust pipe 2 at the steam storage tank 6 is 1.5-2.0 times that at the constant position. As the steam exits the exhaust pipe 2, its temperature decreases, leading to condensation. The gradual tapering increases pressure, reducing the degree of condensation at the pipe opening.

[0024] The three pressure relief valves 3 are three pressure relief valves with gradually increasing pressure relief. They perform step-by-step pressure relief. When the pressure relief of the minimum pressure relief valve is P1, the pressure relief of the other pressure relief valves 3 is at least 1.5 times and 2 times higher. In this way, when the overpressure is large, all three pressure relief valves relieve pressure simultaneously, and when the overpressure is small, only 1-2 pressure relief valves relieve pressure.

[0025] The middle position of the steam replenishment tank 5 should not be higher than the bottom position of the steam storage tank 6. This ensures the condensate return effect.

[0026] The outer wall of the steam injection tank 5 is covered with an insulation layer. It has a certain insulation effect, and the energy required for heating water to turn into steam will be reduced.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A vertical expansion steam storage tank, characterized in that: The steam storage tank (6), the outer insulation tank (4), and the make-up steam tank (5) are included. The steam storage tank (6) is surrounded by an outer insulation tank (4). A 5-10cm gap is left between the outer wall of the steam storage tank (6) and the inner wall of the outer insulation tank (4). The air in the gap is evacuated to form a vacuum. The steam storage tank (6) has a steam inlet pipe (1) connected to the upper half of the side wall. The steam storage tank (6) has a steam exhaust pipe (2) at the top. The steam storage tank (6) has a condensate return pipe (40) near the bottom. The steam inlet pipe (1), the steam exhaust pipe (2), and the condensate return pipe (40) all pass through the outer insulation tank (4) to the outside. The condensate return pipe (40) is connected to the middle of the lower half of the make-up steam tank (5). The steam storage tank (6) has three pressure relief valves (3) on the side wall near the top. The steam storage tank (6) is equipped with an electronic barometer (42) and an electronic thermometer (43) on the side wall near the top and the middle position, respectively. The steam storage tank (6) is equipped with a first water level gauge (41) near the bottom. The top of the steam replenishment tank (5) is equipped with a steam replenishment pipe (53) and the steam replenishment pipe (53) is connected to the upper part of the steam storage tank (6). The bottom of the steam replenishment tank (5) is equipped with a drain pipe (52) and a solenoid valve is installed in the drain pipe (52). The steam inlet pipe (1), the steam outlet pipe (2), the condensate return pipe (40) and the steam replenishment pipe (53) are all equipped with solenoid valves near the position of the steam storage tank (6). The steam replenishment tank (5) is equipped with a heater near the bottom. The side wall of the steam replenishment tank (5) is equipped with a second water level gauge (51) at the height of the connection with the condensate return pipe (40).

2. A vertical expansion steam storage tank according to claim 1, characterized in that: The gap between the outer wall of the steam storage tank (6) and the inner wall of the outer insulation tank (4) is filled with insulating glass rock wool board.

3. A vertical expansion steam storage tank according to claim 1, characterized in that: The exhaust pipe (2) gradually tapers outward from the steam storage tank (6) for a certain distance, while keeping the inner diameter of the exhaust pipe (2) unchanged. The inner diameter of the exhaust pipe (2) at the steam storage tank (6) is 1.5-2.0 times that of the exhaust pipe (2) at the unchanged position.

4. A vertical expansion steam storage tank according to claim 1, characterized in that: The three pressure relief valves (3) are three pressure relief valves (3) with gradually increasing pressure.

5. A vertical expansion steam storage tank according to claim 1, characterized in that: The middle position of the steam replenishment tank (5) is not higher than the bottom position of the steam storage tank (6).

6. A vertical expansion steam storage tank according to claim 1, characterized in that: The outer wall of the steam tank (5) is covered with an insulation layer.

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