Semi-gasification biomass boiler

Abstract

The utility model discloses a semi-gasification biomass boiler which comprises a hearth, a combustor is installed on the left side of the hearth, a steam chamber is connected to the top of the hearth, a water inlet pipe is connected to the right side of the steam chamber, the other end of the water inlet pipe is connected with a clean water pump, and a clean water tank is arranged on the right side of the clean water pump. An ash removal bin is arranged at the bottom of the hearth, a heat exchange pipe is arranged on the right side in the hearth, a chimney is connected to the upper right portion of the outer wall of the hearth, a secondary air pipe is connected to the middle of the outer wall of the hearth, and a secondary air tank is connected to the tail end of the secondary air pipe. According to the utility model, the existing boiler structure is simplified, the operation is convenient, and the market popularization and application are facilitated. And meanwhile, accessories such as the pressure release valve are arranged, so that safe operation of the boiler can be effectively guaranteed, and better economic value can be created.

Description

Technical Field

[0001] This utility model belongs to the field of boiler technology, and in particular relates to a semi-gasification biomass boiler. Background Technology

[0002] Biomass is a widely used fuel, which includes various organic matter from the metabolism of plants, animals, and all living organisms. Biomass has the characteristics of low energy density and low emissions of harmful substances. Currently, biomass combustion boilers on the market have relatively complex structures, are not easy to operate, and have low combustion efficiency, which limits their further promotion and use in the market. Utility Model Content

[0003] In response to the shortcomings of existing technologies, the inventors developed a semi-gasification biomass boiler based on their extensive experience in the field of hot water unit technology.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a semi-gasification biomass boiler, comprising a furnace, a burner installed on the left side of the furnace, a steam chamber connected to the top of the furnace, a water inlet pipe connected to the right side of the steam chamber, the other end of the water inlet pipe connected to a clean water pump, a clean water tank located to the right of the clean water pump, an ash removal chamber located at the bottom of the furnace, a heat exchange tube located on the right side of the interior of the furnace, a chimney connected to the upper right part of the outer wall of the furnace, a secondary air duct connected to the middle of the outer wall of the furnace, and a secondary air tank connected to the end of the secondary air duct. The pressure of the secondary air tank is not less than 0.4 MPa.

[0005] Furthermore, the burner is connected to a gasification pipe at its left end, and a gasification chamber is connected to the left side of the gasification pipe. A fuel inlet is provided at the top of the gasification chamber for adding fuel.

[0006] Furthermore, a secondary air automatic control valve is installed on the secondary air duct. Based on the biomass combustion situation inside the furnace, the opening degree of the secondary air automatic control valve is controlled to supply fresh air into the furnace, thereby improving combustion efficiency.

[0007] Furthermore, the heat exchanger extends upwards through the furnace wall into the steam chamber, where the steam chamber is filled with clean water that saturates the tubes of the heat exchanger. The heat exchanger consists of multiple tubes arranged vertically. The tubes are made of carbon steel.

[0008] Furthermore, a clear water tank outlet pipe is provided between the clear water pump and the clear water tank, a second hand valve is provided on the clear water tank outlet pipe, and a first hand valve is installed on the water inlet pipe.

[0009] Furthermore, a steam valve and a pressure relief valve are respectively installed on the top right side of the steam chamber.

[0010] Furthermore, a cleaning port is provided on the right side of the cleaning chamber.

[0011] Furthermore, a level gauge for observing the liquid level is provided at the left end of the steam chamber.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention simplifies the existing boiler structure, making it easier to operate. A secondary air duct is connected to the right side of the furnace, allowing for timely replenishment of air to the boiler based on the combustion status, effectively improving combustion efficiency. Most of the heat generated by the combustion of biomass gas in the furnace is absorbed by the heat exchanger, with a small portion discharged through the chimney to the next process, thus reducing the flue gas temperature and facilitating market promotion and application. Simultaneously, accessories such as pressure relief valves are included to effectively ensure the safe operation of the boiler, creating significant economic value. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Attached reference numerals: 1. Furnace, 2. Burner, 3. Feed port, 4. Ash removal bin, 5. Ash removal port, 6. Heat exchanger, 7. Steam chamber, 8. Steam valve, 9. Pressure relief valve, 10. Chimney, 11. Secondary air tank, 12. Secondary air duct, 13. Secondary air automatic control valve, 14. Clear water tank, 15. Clear water pump, 16. Clear water tank outlet pipe, 17. Secondary manual valve, 18. Water inlet pipe, 19. Primary manual valve, 20. Level gauge, 21. Gasification chamber, 22. Gasification pipe. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale; for example, the thickness or width of some layers may be exaggerated relative to other layers.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, if an item is defined or described in one figure, it will not need to be further discussed and described in the description of the following figures. Example

[0020] like Figure 1 As shown, a semi-gasification biomass boiler includes a furnace 1, a burner 2 installed on the left side of the furnace 1, a steam chamber 7 connected to the top of the furnace 1, a water inlet pipe 18 connected to the right side of the steam chamber 7, the other end of the water inlet pipe 18 connected to a clean water pump 15, a clean water tank 14 located to the right of the clean water pump 15, an ash removal chamber 4 located at the bottom of the furnace 1, a heat exchange tube 6 located on the right side of the interior of the furnace 1, a chimney 10 connected to the upper right part of the outer wall of the furnace 1, a secondary air duct 12 connected to the middle part of the outer wall of the furnace 1, and a secondary air tank 11 connected to the end of the secondary air duct 12. The pressure of the secondary air tank 11 is not less than 0.4 MPa.

[0021] In this embodiment, a gasification pipe 22 is connected to the left end of the burner 2, and a gasification chamber 21 is connected to the left side of the gasification pipe 22. A feed port 3 for adding fuel is provided at the top of the gasification chamber 21. The fuel here refers to biomass pellets, which are pyrolyzed and gasified in the gasification chamber 21.

[0022] In this embodiment, a secondary air automatic control valve 13 is provided on the secondary air duct 12. Based on the biomass combustion situation in the furnace 1, the opening degree of the secondary air automatic control valve 13 is controlled to supply fresh air into the furnace 1, thereby improving combustion efficiency.

[0023] In this embodiment, the heat exchanger 6 extends upward through the furnace wall of the furnace chamber 1 into the steam chamber 7, where clean water fills the tubes of the heat exchanger 6. The heat exchanger 6 consists of multiple tubes arranged vertically. The tubes are made of carbon steel.

[0024] In this embodiment, a clear water tank outlet pipe 16 is provided between the clear water pump 15 and the clear water tank 14, a second hand valve 17 is provided on the clear water tank outlet pipe 16, and a first hand valve 19 is installed on the water inlet pipe 18.

[0025] In this embodiment, a steam valve 8 and a pressure relief valve 9 are respectively provided on the top right side of the steam chamber 7.

[0026] In this embodiment, a cleaning port 5 is provided on the right side of the cleaning chamber 4.

[0027] In this embodiment, a level gauge 20 for observing the liquid level is provided at the left end of the steam chamber 7.

[0028] In practical use, the present invention first starts the clean water pump 15, and the clean water in the clean water tank 14 enters the steam chamber 7 through the water inlet pipe 18. Then, the burner 2 is ignited. According to the combustion volume, biomass pellets are gradually added to the gasification chamber 21 through the feeding port 3. The biomass pellets are heated and gasified in the gasification chamber 21, and then enter the burner 2 for combustion through the gasification pipe 22. The heat generated by combustion in the furnace 1 heats the clean water in the steam chamber 7 through the heat exchanger 6. The steam generated in the steam chamber 7 enters the next process through the steam valve 8. A metal grid is provided between the ash removal chamber 4 and the furnace 1. The ash after combustion falls into the ash removal chamber 4 through the metal grid, and this ash can be cleaned up in time through the ash removal port 5. Due to space limitations in the accompanying drawings, the metal grid is not shown in the drawings, but this does not affect the understanding and application of the application documents by those skilled in the art. It should be noted that the installation of the metal grid will not cause a significant drop in the temperature of the furnace 1 and will not affect the normal operation of the boiler.

[0029] During normal operation, the opening of the secondary air automatic control valve 13 can be adjusted according to combustion needs to supply fresh air into the furnace 1. Simultaneously, the main control operator must regularly monitor the liquid level gauge 20, ensuring it does not exceed 80% or fall below 20% to guarantee safe boiler operation.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A semi-gasification biomass boiler, characterized by: The furnace includes a furnace chamber, a burner installed on the left side of the furnace chamber, a steam chamber connected to the top of the furnace chamber, a water inlet pipe connected to the right side of the steam chamber, the other end of the water inlet pipe connected to a clean water pump, a clean water tank located to the right of the clean water pump, an ash removal chamber located at the bottom of the furnace chamber, a heat exchange tube located on the right side of the interior of the furnace chamber, a chimney connected to the upper right part of the outer wall of the furnace chamber, a secondary air duct connected to the middle part of the outer wall of the furnace chamber, and a secondary air tank connected to the end of the secondary air duct.

2. A semi-gasification biomass boiler according to claim 1, characterized in that: The burner is connected to a gasification pipe at its left end, and a gasification chamber is connected to the left side of the gasification pipe. A fuel inlet is provided at the top of the gasification chamber for adding fuel.

3. A semi-gasification biomass boiler according to claim 1, characterized in that: The secondary air duct is equipped with a secondary air automatic control valve.

4. A semi-gasification biomass boiler according to claim 1, characterized in that: A water tank outlet pipe is provided between the water pump and the water tank, a second hand valve is provided on the water tank outlet pipe, and a first hand valve is installed on the water inlet pipe.

5. A semi-gasification biomass boiler according to claim 1, characterized in that: A steam valve and a pressure relief valve are respectively installed on the top right side of the steam chamber.

6. A semi-gasification biomass boiler according to claim 1, characterized in that: A cleaning port is provided on the right side of the cleaning chamber.

7. A semi-gasification biomass boiler according to claim 1, characterized in that: A level gauge for observing the liquid level is installed at the left end of the steam chamber.

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