Waste heat circulating device of biomass particle steam boiler

Abstract

The utility model provides a biomass particle steam boiler waste heat circulation device which comprises a heat exchange tank, an air inlet tank and an air outlet tank, a first partition plate and a second partition plate are fixedly installed in the heat exchange tank, and a main exchange cavity, a water supply cavity and a water drainage cavity are formed between the first partition plate and the heat exchange tank and between the second partition plate and the heat exchange tank. The main exchange cavity is positioned between the water supply cavity and the drainage cavity; the main exchange cavity is not communicated with the water supply cavity and the water drainage cavity; due to the overall arrangement, residual heat in high-temperature flue gas generated after fuel in the biomass particle steam boiler is burnt can fully enter water in the biomass particle steam boiler for heat exchange; in this way, the heating efficiency of water in the biomass particle steam boiler can be improved, and waste of residual heat in high-temperature flue gas generated after fuel of the biomass particle steam boiler is burnt can be avoided.

Description

Technical Field

[0001] The utility model relates to the field of waste heat utilization of steam boilers, and in particular to a waste heat circulation device for a biomass particle steam boiler. Background Art

[0002] Biomass boiler is a type of boiler, that is, a boiler that uses biomass energy as fuel is called a biomass boiler, which is divided into biomass steam boiler, biomass hot water boiler, biomass hot air furnace, biomass thermal oil furnace, vertical biomass boiler, horizontal biomass boiler, etc. The residual heat energy in the high-temperature flue gas generated after the fuel of the biomass pellet steam boiler is burned. This heat energy will be discharged into the atmosphere with the flue gas, resulting in unnecessary waste.

[0003] Therefore, it is very necessary to invent a waste heat circulation device for a biomass pellet steam boiler. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a technical solution adopted by a waste heat circulation device of a biomass pellet steam boiler: a waste heat circulation device of a biomass pellet steam boiler, comprising a heat exchange tank, an air inlet tank and an air outlet tank, wherein: a partition plate 1 and a partition plate 2 are fixedly installed inside the heat exchange tank, and a main exchange chamber, a water supply chamber and a drainage chamber are formed between the partition plate 1 and the partition plate 2 and the heat exchange tank, and the main exchange chamber is located between the water supply chamber and the drainage chamber; the main exchange chamber is not connected to the water supply chamber and the drainage chamber;

[0005] Preferably, a plurality of water distribution pipes are evenly and fixedly installed inside the heat exchange tank, and one end of the water distribution pipe passes through the first partition plate to communicate with the water supply cavity, and the other end of the water distribution pipe passes through the second partition plate to communicate with the drainage cavity;

[0006] Preferably, each of the water distribution pipes is fixedly installed with an air distribution pipe, and one end of the air distribution pipe passes through the water supply cavity and is fixedly connected to the air inlet tank, and the other end of the air distribution pipe passes through the water discharge cavity and is fixedly connected to the air outlet tank; the air distribution pipe is connected to the air inlet tank and the air outlet tank;

[0007] Preferably, the gas outlet tank is fixedly connected to a side of the heat exchange tank close to the drainage chamber through a circulation pipe, and the circulation pipe is in communication with the gas outlet tank and the main exchange chamber.

[0008] Preferably, a water inlet pipe, a water outlet pipe and an exhaust pipe are fixedly installed on the outside of the heat exchange tank, and the water inlet pipe is connected to the water supply chamber, the water outlet pipe is connected to the drainage chamber, and the exhaust pipe is connected to the main exchange chamber, and the exhaust pipe is on the side close to the water supply chamber.

[0009] Preferably, an air intake pipe is fixedly mounted on the outer end of the air intake tank, and the air intake pipe is connected to the interior of the air intake tank.

[0010] Preferably, the outer surfaces of the heat exchange tank, the air inlet tank, the air outlet tank and the circulation pipe are respectively wrapped with corresponding insulation layers.

[0011] Compared with the prior art, the advantages of the utility model are:

[0012] The overall arrangement of the utility model can fully utilize the residual heat in the high-temperature flue gas generated after the fuel of the biomass pellet steam boiler to enter the water in the biomass pellet steam boiler for heat exchange; in this way, not only the heating efficiency of the water in the biomass pellet steam boiler can be improved, but also the waste of the residual heat in the high-temperature flue gas generated after the fuel of the biomass pellet steam boiler can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 It is a schematic diagram of the overall half-section structure of the utility model.

[0015] In the figure:

[0016] Heat exchange tank 1, main exchange chamber 2, water supply chamber 3, drainage chamber 4, water inlet pipe 5, water outlet pipe 6, water distribution pipe 7, air distribution pipe 8, air inlet tank 9, air outlet tank 10, air inlet pipe 11, circulation pipe 12, exhaust pipe 13, partition 1 14, partition 2 15. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be described clearly and completely below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0018] In the description of the embodiments, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0019] The utility model is further described below in conjunction with the accompanying drawings:

[0020] Example

[0021] Reference Figure 1-2 , a waste heat circulation device of a biomass pellet steam boiler, comprising a heat exchange tank 1, an air inlet tank 9 and an air outlet tank 10, wherein: a partition 14 and a partition 2 15 are fixedly installed inside the heat exchange tank 1 to support and fix the water distribution pipe 7, and a main exchange chamber 2, a water supply chamber 3 and a drainage chamber 4 are formed between the partition 14 and the partition 2 15 and the heat exchange tank 1, so that water and the waste heat discharged from the biomass pellet steam boiler can be heat exchanged, and the main exchange chamber 2 is located between the water supply chamber 3 and the drainage chamber 4; the main exchange chamber 2 is not connected with the water supply chamber 3 and the drainage chamber 4;

[0022] Several water distribution pipes 7 are evenly distributed and fixedly installed inside the heat exchange tank 1 so that water can be evenly dispersed through the main exchange chamber 2, and one end of the water distribution pipe 7 passes through the partition 1 14 to communicate with the water supply chamber 3, and the other end of the water distribution pipe 7 passes through the partition 2 15 to communicate with the drainage chamber 4;

[0023] Each water distribution pipe 7 is fixedly installed with an air distribution pipe 8 so that the residual heat in the air distribution pipe 8 can be heat-exchanged with the water in the water distribution pipe 7 to avoid the loss of residual heat in the air distribution pipe 8. One end of the air distribution pipe 8 passes through the water supply cavity 3 and is fixedly connected to the air inlet tank 9. The other end of the air distribution pipe 8 passes through the drainage cavity 4 and is fixedly connected to the air outlet tank 10. The air distribution pipe 8 is connected to the air inlet tank 9 and the air outlet tank 10. The air distribution pipe 8 is coaxial with the water distribution pipe 7, and the diameter of the air distribution pipe 8 is smaller than the inner diameter of the water distribution pipe 7.

[0024] The gas outlet tank 10 is fixedly connected to the side of the heat exchange tank 1 close to the drainage chamber 4 through a circulation pipe 12, and the circulation pipe 12 is connected to the gas outlet tank 10 and the main exchange chamber 2, so that the gas after heat exchange in the gas distribution pipe 8 converges in the gas outlet tank 10, and then enters the main exchange chamber 2 through the circulation pipe 12, and exchanges heat with the water in the water distribution pipe 7 again, thereby improving the overall heat exchange efficiency and quality and reducing heat loss.

[0025] A water inlet pipe 5, a water outlet pipe 6 and an exhaust pipe 13 are fixedly installed on the outside of the heat exchange tank 1, and the water inlet pipe 5 is connected to the water supply chamber 3, and can be connected to an external water supply device through the water inlet pipe 5 to supply water to the water supply chamber 3. The water outlet pipe 6 is connected to the drainage chamber 4, and can be connected to the water inlet pipe of the biomass pellet steam boiler through the water outlet pipe 6 to discharge the water after heat exchange into the biomass pellet steam boiler. The exhaust pipe 13 is connected to the main exchange chamber 2, and the exhaust pipe 13 is on the side close to the water supply chamber 3 to discharge the gas after heat exchange in the main exchange chamber 2 and the condensed water generated during the heat exchange process.

[0026] An air intake pipe 11 is fixedly installed at the outer end of the air intake tank 9 , and the air intake pipe 11 is connected to the inside of the air intake tank 9 so as to transport the waste heat of the biomass pellet steam boiler to the air intake tank 9 .

[0027] The outer surfaces of the heat exchange tank 1, the air inlet tank 9, the air outlet tank 10 and the circulation pipe 12 are respectively wrapped with corresponding insulation layers to reduce heat loss.

[0028] In this embodiment, when in use, the air inlet pipe 11 is fixedly connected to the exhaust pipe of the biomass pellet steam boiler, the water inlet pipe 5 is connected to the external water supply equipment, and the water outlet pipe 6 is connected to the water inlet pipe of the biomass pellet steam boiler; then the gas with waste heat is transported to the air inlet tank 9 through the blower on the smoke pipe, and the gas will enter the corresponding air distribution pipes 8 through the air inlet tank 9; the water in the water supply chamber 3 will enter the corresponding water distribution pipes 7 respectively, so that the water in the water distribution pipes 7 will be mixed with the gas with waste heat in the air distribution pipes 8. Heat exchange is carried out; the gas after the first heat exchange will be concentrated from each gas distribution pipe 8 to the gas outlet tank 10, and then enter the main exchange chamber 2 through the circulation pipe 12, so as to perform another heat exchange on the water in the water distribution pipe 7 until it is discharged from the exhaust pipe 13; the water after heat exchange will be concentrated from each water distribution pipe 7 to the drainage chamber 4, and finally transported to the biomass pellet steam boiler through the water outlet pipe 6; in this way, the waste heat generated by the biomass pellet steam boiler can be fully recycled.

[0029] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the protection scope of the utility model.

Claims

1. A waste heat circulation device for a biomass pellet steam boiler, characterized in that: The invention comprises a heat exchange tank (1), an air inlet tank (9) and an air outlet tank (10), wherein: a partition plate 1 (14) and a partition plate 2 (15) are fixedly installed inside the heat exchange tank (1), and a main exchange chamber (2), a water supply chamber (3) and a drainage chamber (4) are formed between the partition plate 1 (14) and the partition plate 2 (15) and the heat exchange tank (1), and the main exchange chamber (2) is located between the water supply chamber (3) and the drainage chamber (4); and the main exchange chamber (2) is not connected to the water supply chamber (3) and the drainage chamber (4); A plurality of water distribution pipes (7) are evenly and fixedly installed inside the heat exchange tank (1), and one end of the water distribution pipe (7) passes through the first partition plate (14) to communicate with the water supply chamber (3), and the other end of the water distribution pipe (7) passes through the second partition plate (15) to communicate with the drainage chamber (4); An air distribution pipe (8) is fixedly installed in each of the water distribution pipes (7), and one end of the air distribution pipe (8) passes through the water supply chamber (3) and is fixedly connected to the air inlet tank (9), and the other end of the air distribution pipe (8) passes through the water discharge chamber (4) and is fixedly connected to the air outlet tank (10); the air distribution pipe (8) is in communication with the air inlet tank (9) and the air outlet tank (10); The gas outlet tank (10) is fixedly connected to the side of the heat exchange tank (1) close to the drainage chamber (4) via a circulation pipe (12), and the circulation pipe (12) is in communication with the gas outlet tank (10) and the main exchange chamber (2).

2. A waste heat circulation device for a biomass pellet steam boiler as claimed in claim 1, characterized in that: The heat exchange tank (1) is fixedly provided with a water inlet pipe (5), a water outlet pipe (6) and an exhaust pipe (13) on the outside, and the water inlet pipe (5) is connected to the water supply chamber (3), the water outlet pipe (6) is connected to the drainage chamber (4), and the exhaust pipe (13) is connected to the main exchange chamber (2), and the exhaust pipe (13) is on a side close to the water supply chamber (3).

3. A waste heat circulation device for a biomass pellet steam boiler as claimed in claim 1, characterized in that: An air intake pipe (11) is fixedly mounted on the outer end of the air intake tank (9), and the air intake pipe (11) is communicated with the interior of the air intake tank (9).

4. A waste heat circulation device for a biomass pellet steam boiler as claimed in claim 1, characterized in that: The outer surfaces of the heat exchange tank (1), the air inlet tank (9), the air outlet tank (10) and the circulation pipe (12) are respectively wrapped with corresponding insulation layers.

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