Water circulation device for biomass boiler

Abstract

The utility model relates to the field of circulating devices, and discloses a water circulating device for a biomass boiler, which comprises a boiler, a water inlet pipe is fixedly connected to one side of the boiler, a water inlet pump is fixedly connected to the outer wall of the boiler, the input end of the water inlet pump is connected with the water inlet pipe, and a heat exchange assembly is arranged at one end of the water inlet pipe. A shell is arranged at one end of the water inlet pipe, a water outlet assembly is arranged on one side of the shell, the heat exchange assembly comprises a heat exchange pipe and cooling fins, one end of the heat exchange pipe is fixedly connected to one end of the water inlet pipe, and the inner walls of the cooling fins are fixedly connected to the outer wall of the heat exchange pipe. According to the heat exchanger, the heat dissipation fins capable of enlarging the heat dissipation area of the heat exchange pipe are additionally arranged, so that the effects that the heat dissipation effect is better during heat exchange, and the heat exchange process in the heat exchanger is more thorough are achieved, and the problem that the temperature of water in a boiler is always high or low due to the fact that the heat exchange process is not complete is solved.

Description

Technical Field

[0001] The utility model relates to the field of circulation devices, in particular to a water circulation device for a biomass boiler. Background Art

[0002] A biomass boiler is a type of boiler that uses biomass energy as fuel. It primarily utilizes biomass fuels, such as crop straw, forestry residues, wood chips, rice husks, and other combustible materials, converting them into heat through combustion to provide hot water, steam, or heating for production and daily life. Biomass boilers are environmentally friendly and renewable, making them a relatively clean energy source. Therefore, a water circulation device is required to maintain a stable temperature within the boiler.

[0003] Existing water circulation systems for biomass boilers operate using natural circulation. In a closed loop on the boiler's evaporation surface, the water in the riser tubes, located within the furnace and exposed to high-temperature radiation, partially vaporizes, forming a steam-water mixture. This mixture has a lower density than the water in the unheated downcomers, located outside the furnace wall. This density difference creates a pressure differential (flow head), driving the water to flow regularly and continuously through the interconnected, interconnected circuit consisting of the boiler drum, downcomers, lower header, and riser tubes. Another type of water circulation system uses forced circulation, relying on the propulsion of a water pump to force the water to flow. During this circulation process, the water continuously absorbs heat generated by the fuel combustion in the furnace, becomes heated, and flows to locations where hot water or steam is needed, completing the heat transfer while also ensuring cooling of the boiler's heating surfaces.

[0004] However, in the actual use of the biomass boiler water circulation device, there is a more prominent problem, that is, the problem of the water temperature in the boiler being sometimes high and sometimes low due to the incomplete heat exchange process has not been effectively solved. The existence of this situation has greatly affected the high efficiency performance of the biomass boiler water circulation device. Sometimes, although heat exchange has been carried out, some heat has not been fully transferred, making the water temperature unstable, sometimes too high and sometimes too low. This will not only cause certain interference to the normal operation of the biomass boiler, but also fail to give full play to the maximum performance of the water circulation device, thereby limiting the efficiency and stability of the entire system. For this reason, a biomass boiler water circulation device is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above deficiencies, the utility model provides a biomass boiler water circulation device, which aims to improve the problem that the water temperature in the boiler is sometimes high and sometimes low due to incomplete heat exchange process.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a biomass boiler water circulation device, comprising a boiler, a water inlet pipe fixedly connected to one side of the boiler, a water inlet pump fixedly connected to the outer wall of the boiler, an input end of the water inlet pump connected to the water inlet pipe, a heat exchange component provided at one end of the water inlet pipe, a shell provided at one end of the water inlet pipe, and a water outlet component provided at one side of the shell;

[0007] The heat exchange assembly includes a heat exchange tube and a heat dissipation fin. One end of the heat exchange tube is fixedly connected to one end of the water inlet pipe, and the inner wall of the heat dissipation fin is fixedly connected to the outer wall of the heat exchange tube.

[0008] As a further description of the above technical solution:

[0009] The water outlet assembly includes a water outlet pipe and a water outlet pump. One end of the water outlet pipe is fixedly connected to one end of the heat exchange tube. The outer wall of the water outlet pump is fixedly connected to the outer wall of the shell. The input end of the water outlet pump is connected to the water outlet pipe.

[0010] As a further description of the above technical solution:

[0011] One side of the shell is fixedly connected to a water collecting tank, and one side of the water collecting tank is fixedly connected to a liquid level meter.

[0012] As a further description of the above technical solution:

[0013] A return pipe is fixedly connected to one side of the water collecting tank, and a valve 1 is fixedly connected to the outer wall of the return pipe.

[0014] As a further description of the above technical solution:

[0015] A reflux pump is fixedly connected to one side of the water collecting tank, and an input end of the reflux pump is connected to a reflux pipe.

[0016] As a further description of the above technical solution:

[0017] A second valve is fixedly connected to the outer wall of the return pipe, and a buffer tank is fixedly connected to one end of the return pipe.

[0018] As a further description of the above technical solution:

[0019] The water inlet pipe and the water outlet pipe are arranged in a straight line array and fixedly connected to one side of the shell, and the water outlet pipe and the return pipe are arranged in a straight line array and fixedly connected to one side of the shell.

[0020] As a further description of the above technical solution:

[0021] One end of the return pipe is fixedly connected to the outer wall of the water outlet pipe, and one end of the buffer tank is fixedly connected to the outer wall of the water outlet pipe.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, heat dissipation fins are added to expand the heat dissipation area of ​​the heat exchange tube, thereby achieving a better heat dissipation effect during heat exchange, making the heat exchange process inside the heat exchanger more thorough, solving the problem of the water temperature in the boiler being high and low due to incomplete heat exchange process, and improving the efficiency of the water circulation device of the biomass boiler.

[0024] 2. In the utility model, a water collecting tank for collecting condensed water from the tank body, and a pipe and a driving device for returning the collected condensed water to the boiler are added, so that the condensed water generated in the heat exchange process is collected and returned to the boiler for reuse, which solves the problem that condensed water is often generated on the inner wall of the heat exchanger shell during the heat exchange process, affecting the progress of the heat exchange process, and improves the practicality of the water circulation device of the biomass boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a three-dimensional diagram of a water circulation device for a biomass boiler proposed in the utility model;

[0026] Figure 2 This is a schematic diagram of the heat exchange tube structure of a biomass boiler water circulation device proposed in the utility model;

[0027] Figure 3 for Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0028] Figure 4 This is a schematic diagram of the water collecting tank structure of a biomass boiler water circulation device proposed in the utility model.

[0029] Legend:

[0030] 1. Boiler; 2. Water inlet pipe; 3. Water inlet pump; 4. Casing; 5. Heat exchange tube; 6. Radiator fins; 7. Water outlet pipe; 8. Water outlet pump; 9. Water collecting tank; 10. Valve 1; 11. Return pipe; 12. Return pump; 13. Valve 2; 14. Buffer tank; 15. Liquid level gauge. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Reference Figure 1-Figure 3The utility model provides an embodiment: a water circulation device for a biomass boiler, comprising a boiler 1, a water inlet pipe 2 fixedly connected to one side of the boiler 1 for introducing water inside the boiler 1 into a heat exchanger, a water inlet pump 3 fixedly connected to the outer wall of the boiler 1 for providing power for the water introduced into the heat exchanger, an input end of the water inlet pump 3 connected to the water inlet pipe 2, a heat exchange component provided at one end of the water inlet pipe 2, a shell 4 provided at one end of the water inlet pipe 2 for protecting the internal heat exchange component, and a water outlet component provided on one side of the shell 4;

[0033] The heat exchange component includes a heat exchange tube 5 and a heat dissipation fin 6. One end of the heat exchange tube 5 is fixedly connected to one end of the water inlet pipe 2, where the heat exchange process is carried out. The inner wall of the heat dissipation fin 6 is fixedly connected to the outer wall of the heat exchange tube 5 to help with heat exchange. The water outlet component includes a water outlet pipe 7 and a water outlet pump 8. One end of the water outlet pipe 7 is fixedly connected to one end of the heat exchange tube 5 to discharge the water inside the heat exchanger and re-enter the boiler 1. The outer wall of the water outlet pump 8 is fixedly connected to the outer wall of the outer shell 4 to provide power for the discharged water. The input end of the water outlet pump 8 is connected to the water outlet pipe 7.

[0034] Specifically, during the entire water circulation process, first, the water inside the boiler 1 flows smoothly into the interior of the heat exchange tube 5 through the water inlet pipe 2. In the heat exchange tube 5, the water exchanges heat with the outside through the heat exchange tube 5 itself and the heat dissipation fins 6 thereon, absorbing or releasing heat to regulate the water temperature. The heat dissipation fins 6 increase the heat dissipation area of ​​the heat exchange tube 5, making the overall heat exchange process more thorough. Subsequently, the water after heat exchange smoothly enters the interior of the water outlet pipe 7 from the heat exchange tube 5. Finally, the water flows back to the interior of the boiler 1 through the water outlet pipe 7, completing a complete water cycle. The entire process is orderly and cyclical, ensuring the continuous flow of water and the stability of temperature, providing reliable protection for the normal operation of the boiler 1.

[0035] Reference Figure 4One side of the housing 4 is fixedly connected to a water collecting tank 9, and one side of the water collecting tank 9 is fixedly connected to a liquid level meter 15. The water level in the water collecting tank 9 can be monitored in real time. A return pipe 11 is fixedly connected to one side of the water collecting tank 9. The return pipe 11 is the channel for water backflow. A valve 10 is fixedly connected to the outer wall of the return pipe 11, which can control the on-off of the return pipe 11 and the water collecting tank 9. A return pump 12 is fixedly connected to one side of the water collecting tank 9 to provide power for the backflow. The input end of the return pump 12 is connected to the return pipe 11, and a valve 2 13 is fixedly connected to the outer wall of the return pipe 11, which can control the on-off of the return pipe 11 and the outlet pipe 7. One end of the return pipe 11 is fixedly connected to a buffer tank 14 to buffer the incoming and outgoing water flow and prevent the pipeline from being broken by water pressure. The water inlet pipe 2 and the outlet pipe 7 are arranged in a linear array and fixedly connected to one side of the outer shell 4. The outlet pipe 7 and the return pipe 11 are arranged in a linear array and fixedly connected to one side of the outer shell 4. One end of the return pipe 11 is fixedly connected to the outer wall of the outlet pipe 7, and one end of the buffer tank 14 is fixedly connected to the outer wall of the outlet pipe 7.

[0036] Specifically, when the water body is undergoing heat exchange inside the heat exchange tube 5, some water vapor will gradually be generated. The water vapor will flow slowly downward along the inner wall of the heat exchanger and eventually flow into the water collecting tank 9 below. When the liquid level meter 15 detects that the water level in the water collecting tank 9 reaches a certain height, it will start valve 10 to allow the water inside the water collecting tank 9 to be smoothly introduced into the return pipe 11. At the same time, the reflux pump 12 and valve 2 13 will also be opened accordingly. Under the action of the reflux pump 12, the water will be forcefully introduced into the outlet pipe 7, thereby successfully introducing the condensed water into the water circulation process. This cleverly utilizes the condensed water of water vapor, allowing it to re-participate in the water circulation, improves the utilization efficiency of water resources, and ensures the stable operation of the entire water circulation system.

[0037] Working principle: When using the biomass boiler water circulation device, when the boiler 1 starts working, the water inside will be pumped into the water inlet pipe 2 by the suction of the water inlet pump 3, and then introduced into the heat exchange pipe 5 from the inside of the water inlet pipe 2. Heat exchange is carried out through the heat exchange pipe 5 itself and the heat dissipation fins 6 fixed thereon. The heat dissipation fins 6 increase the overall heat dissipation area to make the heat dissipation efficiency higher. Then, the water that has completed the heat exchange will be introduced into the outlet pipe 7, and powered by the outlet pump 8 to return to the inside of the boiler 1 to continue circulating. 5, a portion of water vapor is generated during heat exchange. This water vapor will slowly flow down from the inner wall of the heat exchanger and gather in the water collecting tank 9. When the liquid level gauge 15 on the water collecting tank 9 senses that the water level has reached a certain height, it will open the valve 10, the reflux pump 12 and the valve 2 13, so that the collected condensed water is introduced into the return pipe 11, and driven by the reflux pump 12 from the return pipe 11 into the water outlet pipe 7, so that the condensed water enters the water circulation process for circulation, thus completing the recovery and reuse of the condensed water in the heat dissipation process.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A biomass boiler water circulation device, comprising a boiler (1), characterized in that: A water inlet pipe (2) is fixedly connected to one side of the boiler (1), a water inlet pump (3) is fixedly connected to the outer wall of the boiler (1), an input end of the water inlet pump (3) is connected to the water inlet pipe (2), a heat exchange component is provided at one end of the water inlet pipe (2), a shell (4) is provided at one end of the water inlet pipe (2), and a water outlet component is provided at one side of the shell (4); The heat exchange assembly comprises a heat exchange tube (5) and a heat dissipation fin (6), one end of the heat exchange tube (5) is fixedly connected to one end of the water inlet pipe (2), and the inner wall of the heat dissipation fin (6) is fixedly connected to the outer wall of the heat exchange tube (5).

2. The biomass boiler water circulation device according to claim 1, characterized in that: The water outlet assembly comprises a water outlet pipe (7) and a water outlet pump (8), one end of the water outlet pipe (7) is fixedly connected to one end of the heat exchange pipe (5), the outer wall of the water outlet pump (8) is fixedly connected to the outer wall of the housing (4), and the input end of the water outlet pump (8) is connected to the water outlet pipe (7).

3. The biomass boiler water circulation device according to claim 1, characterized in that: A water collecting tank (9) is fixedly connected to one side of the housing (4), and a liquid level meter (15) is fixedly connected to one side of the water collecting tank (9).

4. The biomass boiler water circulation device according to claim 3, characterized in that: A return pipe (11) is fixedly connected to one side of the water collecting tank (9), and a valve 1 (10) is fixedly connected to the outer wall of the return pipe (11).

5. The biomass boiler water circulation device according to claim 4, characterized in that: A reflux pump (12) is fixedly connected to one side of the water collecting tank (9), and an input end of the reflux pump (12) is connected to a reflux pipe (11).

6. The biomass boiler water circulation device according to claim 5, characterized in that: A second valve (13) is fixedly connected to the outer wall of the return pipe (11), and a buffer tank (14) is fixedly connected to one end of the return pipe (11).

7. The biomass boiler water circulation device according to claim 1, characterized in that: The water inlet pipe (2) and the water outlet pipe (7) are arranged in a straight line array and fixedly connected to one side of the housing (4); the water outlet pipe (7) and the return pipe (11) are arranged in a straight line array and fixedly connected to one side of the housing (4).

8. The biomass boiler water circulation device according to claim 6, characterized in that: One end of the return pipe (11) is fixedly connected to the outer wall of the water outlet pipe (7), and one end of the buffer tank (14) is fixedly connected to the outer wall of the water outlet pipe (7).

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