Steam boiler for burning high-moisture wood chips

Abstract

The utility model relates to the technical field of steam boilers, in particular to a steam boiler for combusting high-moisture wood chips, two drying cavities for drying are symmetrically formed in the two ends of a combustion furnace, and ventilation nets for exhausting are evenly and fixedly installed at the side ends of the drying cavities; in the process of combustion heating in the combustion furnace, part of heat penetrates through the combustion furnace to be transmitted into the drying cavity, the transmitted heat can heat wood chips containing moisture in the drying cavity, the moisture in the wood chips can be evaporated to a certain degree, and evaporated water vapor can be discharged along the ventilation nets at the two ends; the water content of the wood chips is reduced, after the lower wood chips are pulled out, the upper wood chips fall into the lower portion under the action of gravity, the upper wood chips are continuously dried along with downward movement, the dried wood chips can be combusted more fully, and the effects of improving the energy utilization rate and reducing pollutant emission are achieved.

Description

Technical Field

[0001] This utility model relates to the field of steam boiler technology, and in particular to a steam boiler that burns high-moisture wood chips. Background Technology

[0002] In the fields of energy utilization and industrial production, steam boilers play a crucial role as important thermal energy equipment. With increasing emphasis on renewable energy and the efficient utilization of timber resources, the demand for generating steam by burning wood chips as fuel is growing. In practical applications, steam boilers that burn high-moisture wood chips typically require the following technologies:

[0003] 1. The combustion chamber adopts a special shape and structure to promote complete combustion of fuel and improve thermal efficiency;

[0004] 2. Smoke extraction mechanism to ensure that exhaust gases and smoke generated during combustion can be discharged smoothly, ensuring the stability of combustion;

[0005] 3. Heat recovery mechanisms, such as waste heat recovery heat exchangers, can maximize the use of heat energy generated by combustion and improve energy efficiency.

[0006] Existing combustion-type steam boilers heat water by burning combustibles such as firewood, raising the water temperature to generate steam, which then provides pressure.

[0007] However, during the implementation of the above technical solution, at least the following technical problems were found: when used, if the firewood has a high moisture content, it will be difficult to burn completely, resulting in energy waste. Incomplete combustion can also produce a large amount of pollutants, such as soot and sulfur dioxide, which puts a great deal of pressure on the environment. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a steam boiler for burning high-moisture wood chips. This solves the technical problem that when the wood has a high moisture content, it is difficult to burn it completely, leading to energy waste. Furthermore, incomplete combustion can easily produce a large amount of pollutants, such as soot and sulfur dioxide, which puts significant pressure on the environment.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A steam boiler for burning high-moisture wood chips includes a combustion furnace with a steam boiler body installed on it. Two drying chambers for drying are symmetrically opened at both ends of the combustion furnace. Ventilation meshes for exhaust are uniformly fixedly installed on the side ends of the drying chambers. Pressure-bearing support bars are uniformly and alternately installed inside the drying chambers.

[0011] Preferably, a base is fixedly installed at the bottom of the combustion furnace.

[0012] Preferably, a dust collection box for collecting ash is slidably installed inside the base.

[0013] Preferably, an ash discharge plate for ash discharge is slidably installed at the bottom of the combustion furnace.

[0014] Preferably, a flue pipe for exhausting gas is fixedly installed on the combustion furnace.

[0015] Preferably, a heat insulation sleeve for heat insulation is fixedly installed on the ash removal plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Place the wood chips containing moisture into the drying chambers on both sides of the combustion furnace. During the combustion heating process inside the furnace, some heat will pass through the furnace and be transferred to the drying chambers. The transferred heat will heat the wood chips containing moisture inside the drying chambers, causing some of the moisture to evaporate. The evaporated water vapor can be discharged through the vents at both ends, reducing the water content in the wood chips. The dried wood chips can then be pulled out from the bottom of the drying chamber and put into the combustion furnace for combustion. When the wood chips at the bottom are pulled out, the wood chips at the top will fall to the bottom under the action of gravity. As the wood chips at the top move downwards, they will be continuously dried. The dried wood chips can burn more completely, achieving the effects of improving energy utilization and reducing pollutant emissions.

[0018] Second, after the wood chips have burned, some ash will be produced. Then, by holding the heat insulation sleeve, the ash discharge plate can be slid. The sliding of the ash discharge plate will open the ash outlet at the bottom of the combustion furnace, allowing the ash to fall into the interior of the base. At the same time as the ash falls, the horizontally arranged ash outlets will prevent unburned wood chips from being discharged, thus facilitating the discharge of combustion ash and ensuring the combustion space inside the combustion furnace. Attached Figure Description

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0020] Figure 1 This is a structural diagram of the combustion furnace of this utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of the combustion furnace of this utility model;

[0022] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A;

[0023] Figure 4This is a cross-sectional structural diagram of the exhaust pipe of this utility model;

[0024] Figure 5 This is a structural diagram of the ash removal plate of this utility model.

[0025] Legend: 1. Combustion furnace; 2. Steam boiler body; 3. Drying chamber; 4. Ventilation mesh; 5. Support bar; 6. Base; 7. Dust collection box; 8. Ash removal plate; 9. Smoke exhaust pipe; 11. Insulation jacket. Detailed Implementation

[0026] This application provides a steam boiler for burning high-moisture wood chips, effectively solving the technical problem that when burning wood with high moisture content, it is difficult to achieve complete combustion, leading to energy waste and the generation of large amounts of pollutants such as soot and sulfur dioxide, which puts significant pressure on the environment. The moisture-containing wood chips are placed in drying chambers on both sides of the combustion furnace. During the combustion heating process inside the furnace, some heat is transferred through the furnace to the drying chambers, heating the moisture-containing wood chips inside. This causes some of the moisture to evaporate, and the evaporated steam can be discharged through the vents at both ends, reducing the moisture content of the wood chips. The dried wood chips are pulled out from the bottom of the drying chamber and put into the combustion furnace for combustion. After the lower wood chips are pulled out, the upper wood chips will fall to the bottom under the action of gravity. As the upper wood chips move downward, they will be continuously dried. The dried wood chips can burn more completely, which can improve energy utilization and reduce pollutant emissions. After the wood chips have burned, some ash will be produced. Then, by holding the heat insulation sleeve, the ash discharge plate can be slid. The sliding of the ash discharge plate will open the ash outlet at the bottom of the combustion furnace, allowing the ash to fall into the interior of the base. At the same time as the ash falls, the horizontally arranged ash outlet will not discharge unburned wood chips, which can facilitate the discharge of combustion ash and ensure the combustion space inside the combustion furnace.

[0027] Example

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the technical solution in this application embodiment effectively solves the technical problem that when using firewood with high moisture content, it is difficult to achieve complete combustion, leading to energy waste. Furthermore, incomplete combustion easily generates a large amount of pollutants, such as smoke and sulfur dioxide, which puts significant pressure on the environment. The overall approach is as follows:

[0029] In view of the problems existing in the prior art, the present invention provides a steam boiler for burning high-moisture wood chips, including a combustion furnace 1, a steam boiler body 2 installed on the combustion furnace 1, two drying chambers 3 for drying are symmetrically opened at both ends of the combustion furnace 1, and ventilation mesh 4 for exhaust is uniformly fixedly installed on the side end of the drying chamber 3.

[0030] The drying chamber 3 is evenly and interlaced with support bars 5 for bearing pressure. The bottom of the combustion furnace 1 is fixedly installed with a base 6, and a dust collection box 7 for collecting ash is slidably installed inside the base 6.

[0031] An ash discharge plate 8 for ash discharge is slidably installed at the bottom of the combustion furnace 1. An exhaust pipe 9 for exhaust is fixedly installed on the combustion furnace 1. An insulation sleeve 11 for heat insulation is fixedly installed on the ash discharge plate 8.

[0032] Combustion furnace 1: As the main combustion scene, it provides space for the burning of wood chips;

[0033] Steam boiler body 2: Water is added inside, and the heat generated by burning wood chips heats it to produce steam;

[0034] Drying chamber 3: Used to place wood chips containing moisture, and use part of the heat emitted from the combustion furnace 1 to dry them, thereby reducing the moisture content in the wood chips;

[0035] Breathable mesh 4: Prevents wood chips from falling outside the drying chamber 3 while allowing evaporated water vapor to escape;

[0036] Support bar 5: It supports the wood chips and prevents the weight of the upper wood chip from pressing completely on the lower wood chip, ensuring that the lower wood chip can be pulled out.

[0037] Base 6: Provides support for the combustion furnace 1, while preventing the high temperature generated by the combustion in the combustion furnace 1 from being directly conducted to the ground;

[0038] Dust collection box 7: Slides inside base 6 to collect ash;

[0039] Ash discharge plate 8: By sliding open the ash outlet at the bottom of the combustion furnace 1, the ash falls into the base 6;

[0040] Exhaust pipe 9: Exhausts the exhaust gas generated in the combustion furnace 1, creating negative pressure to encourage more air to enter the combustion furnace 1 and promote combustion;

[0041] Insulation sleeve 11: Insulates the high temperature on the ash removal plate 8, allowing the user to pull the ash removal plate 8 to slide and achieve the ash removal function.

[0042] Working principle:

[0043] The first step is to place the wood chips containing moisture into the drying chambers 3 on both sides of the combustion furnace 1. During the combustion heating process inside the combustion furnace 1, some heat will pass through the combustion furnace 1 and be transferred to the drying chambers 3. The transferred heat will heat the wood chips containing moisture inside the drying chambers 3. As the temperature rises, the moisture in the heated wood chips will evaporate to some extent. The evaporated water vapor can be discharged along the vents 4 at both ends, reducing the water content in the wood chips. During the combustion process, the dried wood chips can be pulled out from the bottom of the drying chamber 3 and put back into the combustion furnace 1 for combustion. When the lower wood chips are pulled out, the upper wood chips will fall down under the action of gravity. During this process, the upper wood chips will be continuously dried as they move downwards. The staggered support bars 5 on both sides of the drying chamber 3 can provide some support for the wood chips, preventing the weight of the upper wood chips from completely pressing on the lower wood chips and preventing the lower wood chips from being unable to be pulled out.

[0044] The second step is that during the combustion process, the exhaust pipe 9 installed at the rear of the combustion furnace 1 will discharge the exhaust gas generated in the combustion furnace 1. After the exhaust gas is discharged, a certain negative pressure will be formed inside the combustion furnace 1, which will allow more air to enter the combustion furnace 1 under the action of negative pressure. After the wood chips are burned, some ash will be produced. Then, by holding the heat insulation sleeve 11, the ash discharge plate 8 can be slid. The sliding of the ash discharge plate 8 will open the ash outlet at the bottom of the combustion furnace 1, allowing the ash to fall into the base 6. At the same time as the ash falls, the horizontally arranged ash outlet will prevent unburned wood chips from being discharged.

[0045] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications 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. A steam boiler for burning high-moisture wood chips, comprising a combustion furnace (1) on which a steam boiler body (2) is mounted, characterized in that, Two drying cavities (3) for drying are symmetrically arranged at both ends of the combustion furnace (1), uniformly fixed support strips (5) for bearing pressure are staggered arranged in the inside of the drying cavities (3), and air permeable nets (4) for exhausting are uniformly fixed at the side ends of the drying cavities (3).

2. A steam boiler for combusting wood chips with high moisture content as claimed in claim 1, characterized in that A base (6) is fixedly arranged at the bottom end of the combustion furnace (1).

3. A steam boiler for combusting wood chips with high moisture content as claimed in claim 2, characterized in that A dust collecting box (7) for collecting ash is slidingly arranged in the inside of the base (6).

4. A steam boiler for combusting high-moisture wood chips as claimed in claim 1, characterized in that, An ash discharging plate (8) for discharging ash is slidingly arranged at the bottom end of the combustion furnace (1).

5. A steam boiler for combusting high-moisture wood chips as claimed in claim 1, characterized in that, An exhaust pipe (9) for exhausting is fixedly arranged on the combustion furnace (1).

6. A steam boiler for combusting wood chips with high moisture content as claimed in claim 4, characterized in that, An insulating sleeve (11) for heat insulation is fixedly arranged on the ash discharging plate (8).

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