Steam boiler steam delivery control device

Abstract

The utility model relates to a boiler steam delivery technical field discloses a steam boiler steam delivery control device, including the delivery pipe and water tank, and the delivery pipe is located above the side of water tank, and the adjusting valve is installed on the delivery pipe, and the side of adjusting valve is connected with the communicating pipe that communicates with the delivery pipe, and the communicating pipe end penetrates to the below in water tank, and the first pressure relief valve that installs in the water tank direction is conducted to the communicating pipe, and the side of water tank above and the side below are connected with the water inlet pipe and the water outlet pipe respectively. The utility model technical scheme is through setting up the water tank for the temporary storage of clean water, when adjusting the steam volume and leading to the overhigh boiler steam pressure, will open the first pressure relief valve on the communicating pipe connected with the delivery pipe, and the redundant steam enters to the inside of water tank and directly acts with its inside clean water and heats it, can realize the purpose of the boiler pressure relief and the utilization of the waste heat of the steam that leaks to heat the clean water, and the clean water after heating is supplemented to the boiler still has the energy -conserving effect.

Description

Technical Field

[0001] This utility model relates to the field of boiler steam transmission technology, specifically a steam transmission control device for a steam boiler. Background Technology

[0002] A steam boiler is a thermal device that converts the heat energy from fuel combustion into steam energy. It heats water in the boiler by burning fuels such as coal, oil, natural gas, or biomass to produce high-temperature, high-pressure steam. It is widely used in industrial production, power generation, and heating. Its core components include the furnace, water-cooled walls, and superheaters. It features efficient heat transfer and automatic control. Modern steam boilers emphasize energy conservation and environmental protection, adopting low-NOx combustion technology and waste heat recovery devices to reduce pollutant emissions. According to fuel type, they can be divided into coal-fired, oil-fired, gas-fired, and electric heating boilers. According to structure, they can be divided into vertical and horizontal types to meet the needs of different scenarios.

[0003] Steam-using equipment has different steam requirements at different working periods. In order to meet these requirements, the steam supply needs to be controlled. When more steam is needed, the heating power can be increased and the valve opening can be increased; when less steam is needed, the heating power needs to be reduced and the valve opening can be decreased.

[0004] However, when reducing heating power and valve opening degree, the steam output cannot be reduced immediately due to residual heat. Directly reducing the valve opening degree will cause a rapid increase in gas pressure inside the boiler and pipelines. Increasing boiler power to quickly increase steam output can also easily lead to excess steam generation, which will also cause a rapid increase in gas pressure inside the boiler and pipelines, posing certain safety hazards. Therefore, we propose a steam boiler steam delivery control device. Utility Model Content

[0005] The purpose of this invention is to provide a steam conveying control device for a steam boiler. By setting up a water tank for temporary storage of clean water, when the boiler steam pressure is too high due to the adjustment of the steam volume, the first pressure relief valve on the connecting pipe connected to the conveying pipe will be opened. The excess steam enters the water tank and directly interacts with the clean water inside to heat it. This can achieve the purpose of depressurizing the boiler and using the residual heat of the released steam to heat the clean water. The heated clean water is then added to the boiler, which also has an energy-saving effect, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a steam conveying control device for a steam boiler, comprising a conveying pipe and a water tank. The conveying pipe is located above the side of the water tank, and a regulating valve is installed on the conveying pipe. A connecting pipe communicating with the conveying pipe is connected to the side of the regulating valve, and the end of the connecting pipe extends into the lower part of the water tank. A first pressure relief valve that leads to the water tank is installed on the connecting pipe. An inlet pipe and an outlet pipe are respectively connected above and below the side of the water tank. Valves are installed on both the inlet pipe and the outlet pipe. The height of the inlet pipe is less than the height of the conveying pipe.

[0007] By adopting the above technical solution, when the steam pressure inside the boiler increases due to the adjustment of the steam delivery volume, the steam pressure will open the first pressure relief valve to allow the excess steam to enter the water tank and directly contact the clean water in the water tank to heat it. This achieves the purpose of relieving pressure inside the boiler and ensuring safety, and the heated water can be replenished to the boiler to achieve the purpose of energy saving.

[0008] Optionally, the end of the connecting pipe is connected to a bottom pipe located at the bottom of the water tank, and multiple air outlet pipes communicating with the interior of the bottom pipe are evenly arranged on the side of the bottom pipe.

[0009] By adopting the above technical solution, steam is directly guided to the bottom pipe and discharged from multiple steam outlet pipes, which can directly contact the water in the water tank and fully heat the water.

[0010] Optionally, a second pressure relief valve is connected to the top of the water tank, and the second pressure relief valve is connected to the water tank through a pipe.

[0011] By adopting the above technical solution, when the pressure inside the water tank increases due to the introduction of steam, the pressure can be released through the second pressure relief valve.

[0012] Optionally, a liquid level sensor is installed inside the water tank to monitor the water level inside the tank.

[0013] By adopting the above technical solution, the water level in the water tank can be monitored in real time, and the valve on the inlet pipe can be opened in time to replenish water when there is a water shortage.

[0014] Optionally, a temperature sensor is installed inside the water tank to monitor the water temperature inside the tank.

[0015] By adopting the above technical solution, the temperature of the clean water in the water tank is monitored, and when the temperature is high, the outlet valve is opened in advance to replenish water into the boiler.

[0016] Optionally, both ends of the conveying pipe are connected to flange joints, and the flange joints at both ends are of the same size.

[0017] By adopting the above technical solution, both ends of the conveying pipe are connected to the boiler or steam-using equipment through flange joints.

[0018] Optionally, the bottom of the water tank is supported vertically at all four corners by legs of the same height.

[0019] By adopting the above technical solution, the water tank is supported by the feet at its four bottom corners.

[0020] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows: 1. The technical solution of this application sets up a water tank for temporary storage of clean water. When the boiler steam pressure is too high due to the adjustment of the steam volume, the first pressure relief valve on the connecting pipe connected to the delivery pipe will be opened. The excess steam enters the water tank and directly acts on the clean water inside to heat it. This can achieve the purpose of depressurizing the boiler and using the residual heat of the released steam to heat the clean water, avoiding potential safety hazards. The heated clean water is then added to the boiler, which also has an energy-saving effect.

[0021] 2. The technical solution of this application connects the connecting pipe to the bottom pipe located at the bottom of the water tank. Steam enters the water tank from the evenly distributed steam outlet pipe and comes into contact with the clean water, so that the clean water can fully absorb the heat of the steam and be heated. Attached Figure Description

[0022] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of the steam conveying control device for the steam boiler of this utility model; Figure 2 This is a schematic diagram of the internal side structure of the water tank of the steam boiler steam delivery control device of this utility model.

[0023] In the diagram: 1. Delivery pipe; 11. Regulating valve; 12. Flange joint; 13. Connecting pipe; 131. First pressure relief valve; 2. Water tank; 21. Inlet pipe; 22. Outlet pipe; 23. Second pressure relief valve; 24. Support leg; 25. Liquid level sensor; 26. Temperature sensor; 3. Bottom pipe; 31. Air outlet pipe. Detailed Implementation

[0024] Please see Figure 1-2This utility model provides a technical solution: a steam conveying control device for a steam boiler, including a conveying pipe 1 and a water tank 2. The bottom of the water tank 2 is supported by four vertical legs 24 at the four corners. The four legs 24 are at the same height to support the water tank 2 off the ground. The upper and lower sides of the water tank 2 are respectively connected to an inlet pipe 21 and an outlet pipe 22. Valves are installed on both the inlet pipe 21 and the outlet pipe 22. When in use, the inlet pipe 21 is connected to a clean water source. The valve is an electrically controlled valve. By controlling the valve, water can be added to the water tank 2 when needed. Opening the valve on the outlet pipe 22 can discharge the water in the water tank 2 when needed.

[0025] The conveying pipe 1 is parallel to one side of the water tank 2 and located above the side of the water tank 2. In order to achieve the purpose of adjusting the overall conveying volume, a regulating valve 11 is installed on the conveying pipe 1. Both ends of the conveying pipe 1 are connected to flange joints 12. The flange joints 12 at both ends are the same size. In use, the two ends of the conveying pipe 1 are connected to the boiler and the steam-consuming equipment respectively through the flange joints 12. The steam conveying volume is increased by simultaneously increasing the boiler power and the opening degree of the regulating valve 11, and the steam conveying volume is reduced by simultaneously decreasing the boiler power and the opening degree of the regulating valve 11.

[0026] The above methods for adjusting steam delivery present two problems: 1. Increasing boiler power to rapidly increase steam output can easily lead to excess steam generation, causing a rapid increase in pressure inside the boiler and pipelines; 2. Reducing heating power and valve opening degree cannot immediately reduce steam production due to residual heat, and directly reducing valve opening degree will cause a rapid increase in pressure inside the boiler and pipelines. This increased pressure inside the boiler and pipelines poses certain safety hazards.

[0027] Therefore, a connecting pipe 13, which communicates with the conveying pipe 1, is connected to the side of the regulating valve 11. The end of the connecting pipe 13 extends into the lower part of the water tank 2, and a first pressure relief valve 131, which leads to the water tank 2, is installed on the connecting pipe 13. In use, the pressure relief threshold of the first pressure relief valve 131 is set. When the steam pressure in the boiler increases and exceeds the threshold set by the first pressure relief valve 131, the excess steam will push open the first pressure relief valve 131 and pass through the connecting pipe 13. It will then be discharged from the bottom of the connecting pipe 13 and directly contact the clean water in the water tank 2, thereby heating the clean water and releasing a large amount of residual heat from the steam. The pressure is absorbed and its volume is reduced. In addition, the top of the water tank 2 is connected to a second pressure relief valve 23. The second pressure relief valve 23 is connected to the water tank 2 through a pipe. When the pressure inside the water tank 2 exceeds the set threshold, the pressure will be released through the second pressure relief valve 23 to ensure safety. When the pressure inside the boiler is lower than the set threshold of the first pressure relief valve 131, steam will no longer enter the bottom pipe 3. In order to ensure that there is a sufficient pressure difference between the water tank 2 and the delivery pipe 1, and to ensure that the depressurized steam can smoothly enter the water tank 2, the pressure relief threshold set by the second pressure relief valve 23 is much smaller than the pressure relief threshold of the first pressure relief valve 131.

[0028] The height of the inlet pipe 21 is also made smaller than that of the delivery pipe 1, so that the liquid level replenished by the inlet pipe 21 will not exceed the height of the delivery pipe 1, thus preventing the water in the water tank 2 from overflowing to the height of the delivery pipe 1 and coming into contact with the first pressure relief valve 131. The end of the connecting pipe is connected to the bottom pipe 3 located at the bottom of the water tank 2. Multiple air outlet pipes 31 are evenly arranged on the side of the bottom pipe 3 and communicate with its interior. When in use, the steam is directly guided to the position of the bottom pipe 3 and discharged from the multiple air outlet pipes 31, which can directly contact the water in the water tank 2 and fully heat the water. When there is clean water in the connecting pipe 13 or the bottom pipe 3, the steam pressure will first push the water inside to the water tank 2, and then the steam will enter the water tank 2 from the air outlet pipe 31 of the bottom pipe 3 to heat the clean water.

[0029] Connect the outlet pipe 22 to the boiler. When the boiler is short of water, the valve on the outlet pipe 22 can be opened to allow heated water to be added to the boiler. This also has an energy-saving effect. A water pump can also be installed on the pipe connecting the outlet pipe 22 and the boiler to pump water into the boiler more smoothly.

[0030] In addition, a level sensor 25 is installed inside water tank 2 to monitor the water level. When the level sensor detects that the water level is too low, the valve on the inlet pipe 21 is opened to replenish water into water tank 2. A temperature sensor 26 is also installed inside water tank 2 to monitor the water temperature. When the temperature sensor 26 detects that the water temperature in water tank 2 is too high, the valve on the outlet pipe 22 can be opened in advance to replenish water to the boiler. All the above sensors and electrical control valves are connected to an industrial control computer, which enables automated or manual control.

[0031] In use, the left side of the conveying pipe 1 is connected to the steam boiler, and the right side of the conveying pipe 1 is connected to the steam-consuming equipment. The inlet pipe 21 is connected to the clean water supply pipe, and the outlet pipe 22 is connected to the boiler's water supply port. The temperature sensor 26, the liquid level sensor 25, the regulating valve 11, and the valves on the inlet pipe 21 and the outlet pipe 22 are connected to the industrial control computer. First, the valve on the inlet pipe 21 is opened to replenish clean water in the water tank 2, ensuring that the liquid level is less than the height of the conveying pipe 1. The pressure relief thresholds are set for the first pressure relief valve 131 and the second pressure relief valve 23, respectively. The pressure relief threshold of the second pressure relief valve 23 is much smaller than the pressure relief threshold of the first pressure relief valve 131. The boiler operates at a specified power, and the regulating valve 11 is opened to the required degree, so that the steam flows to the steam-consuming equipment at the required speed. When it is necessary to increase or decrease the steam delivery, the boiler power and the opening degree of the regulating valve 11 can be increased or decreased simultaneously to achieve the purpose of controlling the steam delivery. When the above operation results in an increase in steam pressure inside the boiler as described in the background technology, if the steam pressure exceeds the threshold set by the first pressure relief valve 131, the excess steam will push open the first pressure relief valve 131 and enter the bottom pipe 3 through the connecting pipe 13. It will then directly contact the clean water in the water tank 2 through the steam outlet pipe 31 to heat the clean water, so that a large amount of residual heat in the steam is absorbed and its volume is reduced. When the pressure inside the water tank 2 exceeds the set threshold, the pressure will be released through the second pressure relief valve 23 to ensure safety. Steam will no longer enter the bottom pipe 3 when the pressure inside the boiler is lower than the set threshold of the first pressure relief valve 131. When the boiler is short of water, the valve on the water outlet pipe 22 can be opened to add heated clean water to the boiler, directly replenishing hot water and achieving energy saving. When the temperature sensor 26 detects that the water temperature in the water tank 2 is too high, the valve on the water outlet pipe 22 can also be opened in advance to replenish water to the boiler. When the water level sensor detects that the water level is too low, the valve on the water inlet pipe 21 is opened to replenish water to the water tank 2.

Claims

1. A steam conveying control device for a steam boiler, comprising a conveying pipe (1) and a water tank (2), characterized in that: The delivery pipe (1) is located above the side of the water tank (2). A regulating valve (11) is installed on the delivery pipe (1). A connecting pipe (13) connected to the side of the regulating valve (11) is connected to the delivery pipe (1). The end of the connecting pipe (13) extends into the lower part of the water tank (2). A first pressure relief valve (131) is installed on the connecting pipe (13) to guide the flow towards the water tank (2). The water tank (2) is connected to an inlet pipe (21) above the side and an outlet pipe (22) below the side, respectively. Valves are installed on both the inlet pipe (21) and the outlet pipe (22). The height of the inlet pipe (21) is less than the height of the delivery pipe (1).

2. The steam boiler steam delivery control device according to claim 1, characterized in that: The end of the connecting pipe is connected to the bottom pipe (3) located at the bottom of the water tank (2), and multiple air outlet pipes (31) are evenly arranged on the side of the bottom pipe (3) and communicate with its interior.

3. The steam boiler steam delivery control device according to claim 1, characterized in that: The top of the water tank (2) is connected to a second pressure relief valve (23), which is connected to the water tank (2) through a pipe.

4. The steam boiler steam delivery control device according to claim 1, characterized in that: The water tank (2) is equipped with a liquid level sensor (25) to monitor the water level inside the water tank (2).

5. The steam boiler steam delivery control device according to claim 1, characterized in that: A temperature sensor (26) is installed inside the water tank (2) to monitor the water temperature inside the water tank (2).

6. The steam boiler steam delivery control device according to claim 1, characterized in that: Both ends of the conveying pipe (1) are connected to flange joints (12), and the flange joints (12) at both ends are the same size.

7. The steam boiler steam delivery control device according to claim 1, characterized in that: The bottom of the water tank (2) is supported by four vertical legs (24) at the four corners, and the legs (24) are all the same height.

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