Normal pressure boiler heat supply system

Abstract

The utility model relates to the technical field of normal pressure boiler equipment, and aims to solve the technical problems of high potential safety hazard and high noise. In order to solve the technical problem, the utility model provides the normal pressure boiler heat supply system. A fuel gas inlet of the boiler is arranged at the front end of the boiler; the heat exchanger is provided with a first side water inlet, a first side water outlet, a second side water inlet and a second side water outlet. The boiler water outlet is communicated with the first side water inlet through a first side water outlet pipeline, and the first side water outlet is communicated with the boiler water return port through the first side water outlet pipeline; a second side water pump is arranged on the second side water outlet pipeline; the far-end equipment is communicated with the second side water outlet through a second side water outlet pipeline, and the far-end equipment is communicated with the second side water inlet through a second side water inlet pipeline; the bypass valve set is used for adjusting the pressure difference between the second side hot water loop and the second side water inlet pipeline. According to the utility model, the cost is reduced and the safety is high; the noise is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of atmospheric pressure boiler equipment, and in particular to an atmospheric pressure boiler heating system. Background Technology

[0002] In factory design and construction, HVAC systems are an essential component, and these systems require a corresponding heating system. This heating system typically uses a heat pump or a boiler as the heat source. Compared to heat pumps, boilers offer faster heating and higher outlet water temperatures, meeting the heating needs of larger factories. Furthermore, in the humid climate of southern regions, air-source heat pumps are prone to operating in a "defrost trap," resulting in a poor heating experience for users. Therefore, for factories in humid areas, boilers are a better choice.

[0003] However, for safety reasons, the hot water pressure of the boiler cannot be too high. However, when the factory building has a high floor height, installing the boiler on the lower floor will cause excessive water pressure, which may pose safety hazards and cause excessive noise. Installing it on the upper floor will increase the design difficulty and cost. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the above-mentioned problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model provides an atmospheric pressure boiler heating system, comprising:

[0006] The boiler is equipped with a fuel inlet, an atmospheric outlet, an exhaust outlet, a boiler outlet, and a boiler return outlet; the fuel inlet is located at the front end of the boiler, and the boiler outlet and boiler return outlet are located at the rear end of the boiler; the heat exchanger is equipped with a first side inlet, a first side outlet, a second side inlet, and a second side outlet.

[0007] The first hot water pipe assembly includes a first inlet pipe and a first outlet pipe; the boiler outlet is connected to the first inlet through the first outlet pipe, and the first outlet is connected to the boiler return pipe through the first outlet pipe, forming a first hot water circuit.

[0008] The second-side hot water pipe assembly includes a second-side inlet pipe and a second-side outlet pipe, and a second-side water pump is installed on the second-side outlet pipe;

[0009] The remote device is connected to the second side outlet through the second side outlet pipe, and the remote device is connected to the second side inlet through the second side inlet pipe to form a second side hot water circuit;

[0010] A bypass valve assembly is connected to the second-side hot water circuit and in parallel to the front end of the remote equipment; the bypass valve assembly is used to regulate the pressure difference between the second-side hot water circuit and the second-side inlet pipe; the bypass valve assembly includes a first control valve and a first butterfly valve connected in series at both ends of the first control valve.

[0011] In one embodiment of this utility model, the application further includes a hot water tank; the hot water tank is disposed on the second side outlet pipe.

[0012] In one embodiment of this utility model, a water tank pump is provided on the equipment between the hot water tank and the remote device.

[0013] In one embodiment of this utility model, the application further includes a drainer disposed on the second side water inlet pipe.

[0014] In one embodiment of this utility model, the front end of the boiler is further provided with an air supply device, and the fuel inlet and the atmospheric outlet are located at the front end of the air supply device.

[0015] In one embodiment of this utility model, the second side water pump is a high-pressure water pump.

[0016] In one embodiment of this utility model, a first-side water pump is provided on the first-side water outlet pipe.

[0017] In one embodiment of this utility model, the exhaust port is connected to the outside through an exhaust pipe, and a second control valve is provided on the exhaust pipe.

[0018] In one embodiment of this utility model, a filter device is provided on the exhaust gas duct.

[0019] In one embodiment of the present invention, the bypass valve group includes a first branch and a second branch connected in parallel; a first control valve and a first butterfly valve are disposed on the first branch; and a second butterfly valve is disposed on the second branch.

[0020] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0021] The atmospheric pressure boiler heating system described in this application is a system composed of a heat exchanger, a first-side hot water circuit, and a second-side hot water circuit. The heat exchanger transfers heat from the hot water in the first-side hot water circuit to the hot water in the second-side hot water circuit. Then, a second-side pump in the second-side hot water circuit supplies the hot water to remote equipment within the building. Since the circulation loops of the first-side and second-side hot water circuits are independent, the water pressure generated by higher buildings is not directly borne by the boiler but by the second-side pump. By selecting a suitable pump model, the high-pressure requirements can be met. Therefore, the boiler can indirectly supply heat to the terminal, allowing the high-pressure load to be borne by the secondary-side pump, achieving the goal of heating high-rise buildings with an atmospheric pressure boiler, reducing costs, and improving safety. Because the first-side hot water circuit is at atmospheric pressure and the second-side hot water circuit is at high pressure, to address the issue of excessive noise, this embodiment includes a bypass valve assembly in the second-side hot water circuit. This bypass valve assembly can adjust the pressure difference between the second-side outlet pipe and the second-side inlet pipe, thereby reducing noise and preventing damage to the equipment caused by excessive pressure difference. Attached Figure Description

[0022] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0023] Figure 1 This is a schematic diagram of a normal pressure boiler heating system according to a preferred embodiment of the present invention;

[0024] Explanation of reference numerals in the accompanying drawings: 100, Boiler; 110, Fuel inlet; 120, Vent to vent; 130, Exhaust outlet; 140, Boiler outlet; 150, Boiler return outlet; 160, Air supply device;

[0025] 200, Heat exchanger; 210, First side inlet; 220, First side outlet; 230, Second side inlet; 240, Second side outlet;

[0026] 300. First-side hot water pipe assembly; 310. First-side inlet pipe; 320. First-side outlet pipe; 321. First-side water pump; 330. First-side hot water circuit;

[0027] 400. Second-side hot water pipe assembly; 410. Second-side inlet pipe; 420. Second-side outlet pipe; 421. Second-side water pump; 430. Second-side hot water circuit; 440. Hot water tank; 450. Water tank pump; 460. Sewage drainer;

[0028] 500. Remote equipment;

[0029] 600, Bypass valve assembly; 610, First control valve; 620, First butterfly valve; 630, Second butterfly valve. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0031] In some comparative embodiments, the natural gas atmospheric pressure boiler hot water system mainly consists of natural gas air intake, exhaust, hot water supply, hot water return, and the boiler body. In taller factory buildings, higher floor heights lead to an increase in the total amount of hot water needed for the entire building. Due to the weight of the hot water in the pipes, this increases the pressure in the boiler's hot water pipes. However, due to the characteristics of the equipment, the boiler cannot withstand excessive pressure.

[0032] Reference Figure 1 As shown, this utility model embodiment provides an atmospheric pressure boiler heating system, including:

[0033] Boiler 100 is provided with a fuel inlet 110, a vent 120, an exhaust outlet 130, a water outlet 140, and a water return outlet 150. The fuel inlet 110 is located at the front end of boiler 100, and the water outlet 140 and water return outlet 150 are located at the rear end of boiler 100. In some embodiments, the exhaust outlet 130 is located on one side of boiler 100. In some embodiments, the vent 120 is located on one side of boiler 100. In other embodiments, the vent 120 is located at the front end of boiler 100.

[0034] The heat exchanger 200 is provided with a first side inlet 210, a first side outlet 220, a second side inlet 230 and a second side outlet 240;

[0035] The first hot water pipe assembly 300 includes a first water inlet pipe 310 and a first water outlet pipe 320; the boiler outlet 140 is connected to the first water inlet 210 through the first water outlet pipe 320, and the first water outlet 220 is connected to the boiler return water inlet 150 through the first water outlet pipe 320, forming a first hot water circuit 330.

[0036] The second hot water pipe assembly 400 includes a second water inlet pipe 410 and a second water outlet pipe 420, and a second water pump 421 is provided on the second water outlet pipe 420.

[0037] The remote device 500 is connected to the second side outlet 240 through the second side outlet pipe 420, and the remote device 500 is connected to the second side inlet 230 through the second side inlet pipe 410, forming the second side hot water circuit 430.

[0038] A bypass valve assembly 600 is connected to the second-side hot water circuit 430 and is connected in parallel to the front end of the remote device 500. The bypass valve assembly 600 is used to regulate the pressure difference between the second-side hot water circuit 430 and the second-side inlet pipe 410. The bypass valve assembly 600 includes a first control valve 610 and a first butterfly valve 620 connected in series at both ends of the first control valve 610.

[0039] Specifically, this application describes a system consisting of a heat exchanger 200, a first-side hot water circuit 330, and a second-side hot water circuit 430. The heat exchanger 200 transfers heat from the hot water in the first-side hot water circuit 330 to the hot water in the second-side hot water circuit 430. The hot water is then supplied to remote equipment 500 within the building via a second-side water pump 421 in the second-side hot water circuit 430. Since the circulation loops of the first-side hot water circuit 330 and the second-side hot water circuit 430 are independent, the water pressure generated by the higher building is not directly borne by the boiler 100, but rather by the second-side water pump 421. By selecting a suitable pump model, the high-pressure requirements can be met. Therefore, the boiler 100 can indirectly supply heat to the terminal, thereby allowing the high-pressure load to be borne by the secondary-side water pump, achieving the goal of using an atmospheric pressure boiler 100 to heat high-rise buildings. Since the first hot water circuit 330 is at normal pressure and the second hot water circuit 430 is at high pressure, in order to solve the problem of high noise, this embodiment sets a bypass valve group 600 in the second hot water circuit 430. The pressure difference between the second water outlet pipe 420 and the second water inlet pipe 410 can be adjusted by the bypass valve group 600, thereby reducing noise and preventing damage to the equipment caused by excessive pressure difference.

[0040] Furthermore, since the first hot water circuit 330 and the second hot water circuit 430 are independent of each other, the two systems can be upgraded separately during maintenance and subsequent modifications, reducing the time costs associated with maintenance. For example, if a new boiler 100 needs to be installed, the new boiler 100 can be installed next to the old boiler 100 first, and then the water in the first hot water circuit 330 can be drained before connecting the new boiler 100.

[0041] Furthermore, this application also includes a hot water tank 440; the hot water tank 440 is installed on the second-side outlet pipe 420. Specifically, this embodiment provides a hot water tank 440, which can temporarily buffer the water in the second-side hot water circuit 430, and also serves as a buffer.

[0042] Furthermore, a water tank pump 450 is installed on the equipment between the hot water tank 440 and the remote device 500. Specifically, in this embodiment, the water tank pump 450 enables the pressurized supply of hot water from the hot water tank 440 to the terminal device.

[0043] Furthermore, this application also includes a drainer 460 installed on the second-side water inlet pipe 410. Specifically, this embodiment includes a drainer 460, which enables the drainage of hot water in the second-side hot water circuit 430, preventing excessive impurities from clogging the heat exchanger 200 or terminal equipment, and reducing maintenance costs.

[0044] Furthermore, the boiler 100 is also equipped with an air supply device 160 at its front end, with a fuel inlet 110 and an atmospheric vent 120 located at the front end of the air supply device 160. Specifically, this embodiment includes an air supply device 160, allowing natural gas and air to enter the air supply device 160 through the fuel inlet 110 and the atmospheric vent 120. The air supply device 160 mixes the two and then supplies them into the boiler 100, where the boiler 100 burns natural gas to provide heat for hot water. This pre-mixing ensures sufficient oxygen for the fuel in the boiler combustion chamber, which helps improve the boiler's thermal efficiency and operating efficiency, while reducing pollutant emissions and ensuring the normal operation and safety of the boiler.

[0045] Furthermore, the second side water pump 421 is a high-pressure water pump. Specifically, in this embodiment, the second side water pump 421 is a high-pressure water pump, thereby improving the capacity of the second side water pump 421 and further improving the lifespan of the first side water pump 321.

[0046] Furthermore, a first-side water pump 321 is provided on the first-side water outlet pipe 320. Specifically, in this embodiment, the circulation of the first-side hot water circuit 330 is realized through the first-side water pump 321.

[0047] Furthermore, the exhaust port 130 is connected to the outside via an exhaust pipe, and a second control valve is installed on the exhaust pipe. Specifically, in this embodiment, the second control valve can control the on / off of the exhaust gas from the boiler 100, thereby achieving automated control.

[0048] Furthermore, a filter device is installed on the exhaust pipe. Specifically, the filter device in this embodiment can treat the exhaust gas generated after combustion to meet the standards before it is discharged into the atmosphere.

[0049] Furthermore, the heat exchanger 200 includes a first tube bundle and a second tube bundle, which exchange heat with each other. The two ends of the first tube bundle are respectively connected to a first side inlet 210 and a first side outlet 220; the two ends of the second tube bundle are respectively connected to a second side inlet 230 and a second side outlet 240. Specifically, in this embodiment, the first tube bundle and the second tube bundle are independently arranged, and they can exchange heat, thereby achieving heat exchange.

[0050] Furthermore, the bypass valve assembly 600 includes a first branch and a second branch connected in parallel; a first control valve 610 and a first butterfly valve 620 are disposed on the first branch; and a second butterfly valve 630 is disposed on the second branch. Specifically, when the first control valve 610 is under maintenance, the second butterfly valve 630 can be opened to allow the application to operate normally, thereby avoiding downtime due to maintenance.

[0051] The first-side inlet pipe 310, the first-side outlet pipe 320, and the heat exchanger 200 are connected together. Under the action of the first-side water pump 321, hot water circulates between the boiler 100 and the heat exchanger 200. The hot water in the first-side hot water circuit 330 will decrease in temperature after passing through the heat exchanger 200 and will increase in temperature after passing through the boiler 100. In the second-side hot water circuit 430, the pipes connect the heat exchanger 200 and the remote equipment 500 (here referring to the air conditioner). Under the action of the second-side water pump 421, hot water circulates between the heat exchanger 200 and the remote equipment 500. After passing through the remote equipment 500, the hot water temperature decreases and then passes through the heat exchanger 200 again. In the heat exchanger 200, the hot water in the first inlet pipe 310 and the hot water in the second hot water circuit 430 will exchange heat (they are not directly connected, and the two system pipe circuits are independent of each other), which causes the hot water temperature in the first inlet pipe 310 to drop and the hot water temperature in the second hot water circuit 430 to rise, thereby achieving the purpose of heating.

[0052] This application enables the boiler 100 to be used in taller buildings and facilitates the maintenance and upgrading of the boiler 100 and the hot water system.

[0053] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An atmospheric pressure boiler heating system, characterized in that: include: The boiler is equipped with a fuel inlet, a vent to the atmosphere, an exhaust outlet, a boiler water outlet, and a boiler water return outlet; the fuel inlet is located at the front end of the boiler, and the boiler water outlet and the boiler water return outlet are located at the rear end of the boiler. The heat exchanger is provided with a first side inlet, a first side outlet, a second side inlet, and a second side outlet; The first side hot water pipe assembly includes a first side inlet pipe and a first side outlet pipe; the boiler outlet is connected to the first side inlet through the first side outlet pipe, and the first side outlet is connected to the boiler return water outlet through the first side outlet pipe, forming a first side hot water circuit. The second-side hot water pipe assembly includes a second-side inlet pipe and a second-side outlet pipe, and a second-side water pump is provided on the second-side outlet pipe; The remote device is connected to the second side outlet through the second side outlet pipe, and the remote device is connected to the second side inlet through the second side inlet pipe to form a second side hot water circuit; A bypass valve assembly is connected to the second-side hot water circuit and in parallel to the front end of the remote device; the bypass valve assembly is used to adjust the pressure difference between the second-side hot water circuit and the second-side inlet pipe; the bypass valve assembly includes a first control valve and a first butterfly valve connected in series at both ends of the first control valve.

2. The atmospheric pressure boiler heating system according to claim 1, characterized in that: It also includes a hot water tank; the hot water tank is installed on the second side outlet pipe.

3. The atmospheric pressure boiler heating system according to claim 2, characterized in that: A water tank pump is installed on the equipment between the hot water tank and the remote device.

4. The atmospheric pressure boiler heating system according to claim 1, characterized in that: It also includes a drainer installed on the second side water inlet pipe.

5. The atmospheric pressure boiler heating system according to claim 1, characterized in that: The boiler is also equipped with an air supply device at its front end, and the fuel inlet and the vent are located at the front end of the air supply device.

6. The atmospheric pressure boiler heating system according to claim 1, characterized in that: The second side water pump is a high-pressure water pump.

7. The atmospheric pressure boiler heating system according to claim 1, characterized in that: A first-side water pump is installed on the first-side water outlet pipe.

8. The atmospheric pressure boiler heating system according to claim 1, characterized in that: The exhaust port is connected to the outside through an exhaust pipe, and a second control valve is provided on the exhaust pipe.

9. The atmospheric pressure boiler heating system according to claim 8, characterized in that: The exhaust pipe is equipped with a filter device.

10. The atmospheric pressure boiler heating system according to claim 1, characterized in that: The bypass valve group includes a first branch and a second branch connected in parallel; the first control valve and the first butterfly valve are installed on the first branch; and the second branch is provided with a second butterfly valve.

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