High-temperature hot blast stove for burning wood chips

Abstract

The utility model relates to the technical field of boilers, in particular to a high-temperature hot-blast stove for burning wood chips, which comprises a stove body, a hearth is arranged inside the stove body, a fire grate is mounted on the inner wall of the hearth, a slag discharging net is mounted at the bottom of the fire grate, a slag collecting groove is mounted below the slag discharging net, a flue is arranged on the upper portion of the stove body, and a smoke outlet is formed in the lower portion of the stove body. One end of the flue is provided with a smoke inlet, the other end of the flue is connected with a smoke exhaust pipe, the outer end of the smoke exhaust pipe is connected with a heat exchanger, a plurality of smoke folding walls are installed in the flue, and the bottom of the flue is provided with a collecting tank. According to the high-temperature hot-blast stove for burning the wood chips, through a series of ingenious structural design, efficient utilization of heat energy and sufficient burning of the wood chips are achieved, and meanwhile the problems that a traditional hot-blast stove is inconvenient to discharge slag and the like are solved. Specifically, due to the fire grate and the slag discharging net arranged in the hearth, the inclined design of the slag collecting groove and the arrangement of the slag discharging opening, ash generated by combustion can be smoothly discharged.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, and specifically, to a high-temperature hot blast stove for burning wood chips. Background Art

[0002] In the technical field of boilers, as an important heat energy device, the hot blast stove is widely used in various industrial production and civil heating occasions. Traditional hot blast stoves mostly use fossil fuels such as coal and fuel oil as heat sources. However, with the enhancement of environmental awareness and the implementation of the sustainable development strategy, it has become an urgent task to search for and utilize renewable energy. As a renewable resource, the heat generated by the combustion of wood chips can be used for heating or industrial production, and it has the advantages of environmental protection and low carbon. Therefore, the research and development of a high-temperature hot blast stove that can efficiently utilize the heat generated by the combustion of wood chips is of great significance for promoting the application of green energy and reducing environmental pollution.

[0003] Some existing hot blast stoves for burning wood chips have problems such as low heat energy utilization efficiency, incomplete combustion, and inconvenient slag discharge, which affect their actual application effects. Therefore, it is necessary to improve the existing technology and design a high-temperature hot blast stove for burning wood chips with a more reasonable structure, higher heat energy utilization efficiency, and more convenient operation to meet the market demand and environmental protection requirements. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a high-temperature hot blast stove for burning wood chips to solve the problems in the above background art that some existing hot blast stoves for burning wood chips have problems such as low heat energy utilization efficiency, incomplete combustion, and inconvenient slag discharge, which affect their actual application effects.

[0005] To achieve the above purpose, the utility model provides a high-temperature hot blast stove for burning wood chips, including a furnace body, characterized in that: a hearth is arranged inside the furnace body, a grate is installed on the inner wall of the hearth, a slag discharge net is installed at the bottom of the grate, a slag collection tank is installed below the slag discharge net, a flue is arranged at the upper part of the furnace body, a smoke inlet is arranged at one end of the flue, the other end of the flue is connected with a smoke exhaust pipe, the outer end of the smoke exhaust pipe is connected with a heat exchanger, several smoke deflecting walls are installed inside the flue, and a collection tank is arranged at the bottom of the flue.

[0006] Preferably, the inner bottom of the slag collection tank is inclined, a slag discharge port is arranged at one end of the slag collection tank, and a cover plate is installed at the slag discharge port.

[0007] Preferably, a blast inlet is arranged at one end of the hearth, and a cover plate is installed outside the blast inlet.

[0008] Preferably, a feeding tank is installed at one end of the furnace body.

[0009] Preferably, a plurality of sedimentation openings are provided at the top of the collection tank.

[0010] Preferably, a plurality of groups of heat exchange flue pipes are installed inside the heat exchanger, and each group of heat exchange flue pipes is connected end to end through a connection bin to form a smoke channel with an S-shaped structure.

[0011] Preferably, one end of the smoke channel with the S-shaped structure is connected to a smoke inlet pipe, and the other end is connected to a smoke outlet pipe. The outer end of the smoke inlet pipe is connected to an exhaust pipe. A cold air inlet is provided at one end of the heat exchanger, and a hot air outlet is provided at the other end of the heat exchanger.

[0012] Preferably, a plurality of annular grooves are provided on the outer wall surface of the heat exchange flue pipe.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] In this high-temperature hot blast stove for burning wood chips, through a series of ingenious structural designs, the efficient utilization of heat energy and the full combustion of wood chips are realized, and at the same time, problems such as inconvenient slag discharge existing in traditional hot blast stoves are solved. Specifically, the grate and slag discharge net provided inside the furnace chamber, as well as the inclined design of the slag collection tank and the setting of the slag discharge port, enable the ash generated by combustion to be discharged smoothly, avoiding the influence of ash accumulation on the combustion effect, and at the same time facilitating the cleaning and maintenance work of users.

[0015] In addition, the smoke deflecting wall and collection tank installed inside the flue further improve the heat energy utilization efficiency, enabling the heat in the flue gas to be more fully transferred to the heat exchanger, thereby increasing the outlet air temperature of the hot blast stove. The S-shaped smoke channel design of the heat exchanger and the annular grooves on the outer wall surface of the heat exchange flue pipe both enhance the heat exchange effect, enabling the hot blast stove to provide hot air at a higher temperature to meet the requirements of various industrial production and civil heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is a schematic diagram of the structure of the heat exchanger in the present utility model;

[0018] Figure 3 is a schematic diagram of the structure of the heat exchange flue pipe in the present utility model;

[0019] The meanings of the various reference numerals in the figure are as follows:

[0020] 1. Furnace body; 2. Furnace chamber; 21. Grate; 22. Air inlet; 23. Feeding trough; 24. Slag discharge screen; 3. Flue; 31. Smoke deflecting wall; 32. Smoke inlet; 33. Sedimentation port; 34. Collection trough; 4. Slag collection trough; 41. Slag discharge port; 5. Smoke exhaust pipe; 6. Heat exchanger; 61. Cold air inlet; 62. Hot air outlet; 63. Smoke inlet pipe; 64. Smoke outlet pipe; 65. Heat exchange smoke pipe; 651. Annular groove; 66. Connecting chamber. Specific embodiments

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] The present invention provides a high-temperature hot blast stove for burning wood chips, as Figures 1 - 3 shown, including a furnace body 1. A furnace chamber 2 is arranged inside the furnace body 1. A grate 21 is installed on the inner wall of the furnace chamber 2. A slag discharge screen 24 is installed at the bottom of the grate 21. A slag collection trough 4 is installed below the slag discharge screen 24. A flue 3 is arranged at the upper part of the furnace body 1. A smoke inlet 32 is arranged at one end of the flue 3. The other end of the flue 3 is connected to a smoke exhaust pipe 5. The outer end of the smoke exhaust pipe 5 is connected to a heat exchanger 6. A plurality of smoke deflecting walls 31 are installed inside the flue 3. A collection trough 34 is arranged at the bottom of the flue 3.

[0023] In this embodiment, the bottom inside of the slag collection trough 4 is inclined. A slag discharge port 41 is arranged at one end of the slag collection trough 4. A cover plate is installed at the slag discharge port 41, which is convenient for the collection and discharge of waste slag.

[0024] Specifically, an air inlet 22 is arranged at one end of the furnace chamber 2. A cover plate is installed outside the air inlet 22, which is convenient for air supply operation.

[0025] Furthermore, a feeding trough 23 is installed at one end of the furnace body 1 for feeding operation.

[0026] Furthermore, a plurality of sedimentation ports 33 are arranged at the top of the collection trough 34, which is convenient for the sedimentation of dust.

[0027] Furthermore, a plurality of groups of heat exchange smoke pipes 65 are installed inside the heat exchanger 6. Each group of heat exchange smoke pipes 65 is connected end to end through a connecting chamber 66 to form a smoke channel with an S-shaped structure, which is convenient for the heat exchange between the smoke and the air in the heat exchanger 6.

[0028] Further, one end of the S-shaped flue gas passage is connected to an inlet pipe 63, and the other end is connected to an outlet pipe 64. The outer end of the inlet pipe 63 is connected to the exhaust pipe 5. One end of the heat exchanger 6 is provided with a cold air inlet 61, and the other end of the heat exchanger 6 is provided with a hot air outlet 62, which is convenient for heating and sending out the air.

[0029] Further, a plurality of annular grooves 651 are arranged on the outer wall surface of the heat exchange flue pipe 65 to increase the contact area between the cold air and the flue gas.

[0030] When the high-temperature hot blast stove for burning wood chips of the present utility model is in use, first, wood chips are added into the furnace chamber 2 through the feeding trough 23 at one end of the furnace body 1. The wood chips burn in the furnace chamber 2 to generate high-temperature flue gas and ash. The grate 21 supports the wood chips to ensure stability during the combustion process.

[0031] The ash generated by combustion falls into the slag collection tank 4 through the slag discharge net 24. The bottom of the slag collection tank 4 is inclined to facilitate the flow of the ash towards the slag discharge port 41. By opening the cover plate at the slag discharge port 41, the ash can be discharged regularly.

[0032] The high-temperature flue gas generated by combustion enters the flue 3 through the flue gas inlet 32. The flue gas flows in the flue 3 and, after being blocked and guided by the smoke deflecting wall 31, extends the flow path and increases the heat exchange time. The dust and unburned carbon particles in the flue gas settle in the collection tank 34 and are discharged through the settling port 33.

[0033] The purified flue gas enters the heat exchanger 6 through the exhaust pipe 5. The flue gas flows in the S-shaped flue gas passage of the heat exchanger 6 and exchanges heat with the cold air entering through the cold air inlet 61. The annular grooves 651 on the outer wall of the heat exchange flue pipe 65 increase the contact area between the cold air and the flue gas, improving the heat exchange efficiency. The heated air after heat exchange is sent out through the hot air outlet 62 and is used for heating or industrial production. Air is sent into the furnace chamber 2 through the air blast opening 22 to assist in burning the wood chips and improve the combustion efficiency.

[0034] Finally, it should be noted that for components such as the heat exchanger 6 in this embodiment, the electronic components in the above components are all general standard components or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or obtained through conventional experimental methods. At the idle places of this device, all the above electrical components are respectively connected through wires. The specific connection means should refer to the sequence of the above working principles for the electrical connection between the electrical components, and they are all well-known technologies in the art.

[0035] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A high-temperature hot blast stove for burning wood chips, comprising a furnace body (1), characterized in that: Inside the furnace body (1), there is a furnace chamber (2). On the inner wall of the furnace chamber (2), there is a grate (21). At the bottom of the grate (21), there is a slag discharge net (24). Below the slag discharge net (24), there is a slag collection tank (4). At the upper part of the furnace body (1), there is a flue (3). One end of the flue (3) is provided with a smoke inlet (32). The other end of the flue (3) is connected to a smoke exhaust pipe (5). The outer end of the smoke exhaust pipe (5) is connected to a heat exchanger (6). Inside the flue (3), there are several smoke deflecting walls (31). At the bottom of the flue (3), there is a collection tank (34).

2. The high-temperature hot-blast stove for burning wood chips according to claim 1, wherein: The bottom inside of the slag collection tank (4) is inclined. One end of the slag collection tank (4) is provided with a slag discharge port (41). A cover plate is installed at the slag discharge port (41).

3. The high-temperature hot blast stove for burning wood chips according to claim 1, characterized in that: One end of the furnace chamber (2) is provided with an air inlet (22). A cover plate is installed outside the air inlet (22).

4. The high-temperature hot blast stove for burning wood chips according to claim 1, characterized in that: One end of the furnace body (1) is installed with a feeding tank (23).

5. The high-temperature hot blast stove for burning wood chips according to claim 1, characterized in that: At the top of the collection tank (34), there are several sedimentation openings (33).

6. The high-temperature hot blast stove for burning wood chips according to claim 1, characterized in that: Inside the heat exchanger (6), there are several groups of heat exchange smoke pipes (65). Each group of heat exchange smoke pipes (65) is connected end to end through a connection chamber (66) to form a smoke channel with an S-shaped structure.

7. The high-temperature hot blast stove for burning wood chips according to claim 6, characterized in that: One end of the smoke channel with an S-shaped structure is connected to a smoke inlet pipe (63), and the other end is connected to a smoke outlet pipe (64). The outer end of the smoke inlet pipe (63) is connected to the smoke exhaust pipe (5). One end of the heat exchanger (6) is provided with a cold air inlet (61), and the other end of the heat exchanger (6) is provided with a hot air outlet (62).

8. The high-temperature hot blast stove for burning wood chips according to claim 7, characterized in that: On the outer wall surface of the heat exchange smoke pipe (65), there are several annular grooves (651).

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