Dual-fuel biomass gas boiler

Abstract

The utility model discloses a dual-fuel biomass gas boiler which comprises an upper barrel body, a hearth is arranged below the upper barrel body, a combustion lamp holder is arranged on the left side of the hearth, a lower barrel body is arranged below the hearth, a natural gas pipe is connected to the left side of the combustion lamp holder, a natural gas self-control valve is arranged on the natural gas pipe, and the lower barrel body is connected with the lower barrel body. A biomass gas pipe is connected to the lower portion of the combustion lamp holder, a biomass gas self-control valve is arranged on the biomass gas pipe, a compressed air pipe is connected to the middle of the left side of the lower barrel, a chemical adding pipe is arranged on the lower middle portion of the left side of the upper barrel, and a tar collecting groove is formed in the bottom of the hearth. The combustion lamp holder adopts an integrated dual-fuel design and is provided with two sets of valve groups, so that biomass gas and natural gas can be combusted, and dual-fuel mixed combustion can also be realized. And good economic benefits are created.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, specifically to a dual-fuel biomass gas boiler. Background Technology

[0002] A biomass gas boiler refers to a boiler that uses biomass gas as fuel, primarily using plant straw, weed wood, and grain husks as raw materials.

[0003] A natural gas boiler is a heat energy conversion device that uses natural gas as fuel, and the heat released from burning natural gas in the furnace heats the water in the boiler and vaporizes it into steam.

[0004] The two types of boilers that use a single fuel cannot meet the market demand for boilers in actual use, thus limiting the market promotion and application of boilers. In view of this, this utility model provides a dual-fuel biomass gas boiler. Utility Model Content

[0005] In response to the shortcomings of existing technologies, the inventors developed a dual-fuel biomass gas boiler based on their extensive experience in the boiler field.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a dual-fuel biomass gas boiler, comprising an upper cylinder, a furnace located below the upper cylinder, a burner head located on the left side of the furnace, a lower cylinder located below the furnace, a natural gas pipe connected to the left side of the burner head, a natural gas automatic control valve installed on the natural gas pipe, a biomass gas pipe connected below the burner head, a biomass gas automatic control valve installed on the biomass gas pipe, a compressed air pipe connected to the middle left side of the lower cylinder, a chemical dosing pipe located in the lower middle left side of the upper cylinder, and a tar collection tank located at the bottom of the furnace. The tar collection tank is made of stainless steel.

[0007] Furthermore, the chemical agent in the dosing pipe is ethylenediaminetetraacetic acid (EDTA). Appropriate addition of this chemical agent to the boiler can prevent scale formation.

[0008] Furthermore, a level gauge is installed on the left side of the upper cylinder. The level gauge includes a level column, a high-limit tube, and a low-limit tube. The high-limit tube and the low-limit tube are arranged horizontally, and the level column is perpendicular to the high-limit tube and the low-limit tube.

[0009] Furthermore, a first pressure gauge is provided on the top right side of the upper cylinder, a main steam valve is provided on the left side of the first pressure gauge, an auxiliary steam valve is provided on the left side of the main steam valve, a safety valve is provided on the left side of the auxiliary steam valve, and a second pressure gauge is provided on the left side of the safety valve.

[0010] Furthermore, a surface drain pipe is provided on the lower right side of the upper cylinder.

[0011] Furthermore, a drain pipe is provided at the bottom right side of the lower cylinder, and a drain valve is provided at the bottom left side of the lower cylinder.

[0012] Furthermore, compressed air blows up the tar at the bottom of the furnace through the compressed air pipe.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The combustion lamp head of this utility model adopts an integrated dual-fuel design and is equipped with two sets of valve groups, which can burn biomass gas, natural gas, or a mixture of the two fuels.

[0015] 2. A stainless steel tar collection tank is installed at the bottom of the furnace, which collects tar while preventing tar from corroding the boiler wall. A compressed air pipe is connected to the bottom of the tar collection tank, allowing unburned tar to be blown into the furnace for re-combustion, improving fuel utilization. This invention has a simple structure, is easy to operate, effectively addresses the shortcomings of existing technologies, meets the needs of the boiler market, and creates better economic benefits. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of a liquid level gauge.

[0018] Figure 3 This is a schematic diagram of a tar collection tank.

[0019] Reference numerals: 1. Upper cylinder, 2. First pressure gauge, 3. Main steam valve, 4. Second pressure gauge, 5. Safety valve, 6. Auxiliary steam valve, 7. Level gauge, 701. High-limit liquid level pipe, 702. Low-limit liquid level pipe, 703. Liquid level pipe, 8. Dosing pipe, 9. Surface drain pipe, 10. Drain pipe, 11. Natural gas pipe, 12. Natural gas automatic control valve, 13. Biomass gas pipe, 14. Biomass gas automatic control valve, 15. Combustion lamp head, 16. Drain valve, 17. Compressed air pipe, 18. Furnace, 19. Lower cylinder, 20. Tar collection tank. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example

[0021] like Figures 1-3 As shown, a dual-fuel biomass gas boiler includes an upper cylinder 1, a furnace 18 located below the upper cylinder 1, a burner 15 located on the left side of the furnace 18, a lower cylinder 19 located below the furnace, a natural gas pipe 11 connected to the left side of the burner 15, a natural gas automatic control valve 12 installed on the natural gas pipe 11, a biomass gas pipe 13 connected below the burner 15, a biomass gas automatic control valve 14 installed on the biomass gas pipe 13, a compressed air pipe 17 connected to the middle left side of the lower cylinder 19, a chemical dosing pipe 8 located in the lower middle left side of the upper cylinder 1, and a tar collection tank 20 located at the bottom of the furnace 18. Figure 3 As shown, the tar collection tank 20 is made of stainless steel.

[0022] In this embodiment, the chemical agent in the dosing pipe 8 is ethylenediaminetetraacetic acid (EDTA). Adding an appropriate amount of this chemical agent to the boiler can prevent scale formation.

[0023] In this embodiment, as Figure 2 As shown, a level gauge 7 is installed on the left side of the upper cylinder 1. The level gauge 7 includes a level column 703, a high-limit tube 701, and a low-limit tube 702. The high-limit tube 701 and the low-limit tube 702 are arranged horizontally, and the level column 703 is perpendicular to the high-limit tube 701 and the low-limit tube 702. During normal operation of the boiler, the liquid level must not be higher than the high-limit tube 701 or lower than the low-limit tube 702.

[0024] In this embodiment, a first pressure gauge 2 is installed on the top right side of the upper cylinder 1. A main steam valve 3 is installed to the left of the first pressure gauge 2, an auxiliary steam valve 6 is installed to the left of the main steam valve 3, a safety valve 5 is installed to the left of the auxiliary steam valve 6, and a second pressure gauge 4 is installed to the left of the safety valve 5. The two pressure gauges can better monitor the pressure of the upper cylinder 1, ensuring safe operation. During normal boiler operation, steam is mainly delivered to the next process through the main steam valve 3. However, when the main steam valve 3 malfunctions, steam can be delivered through the auxiliary steam valve 6, and the main steam valve 3 can be closed for maintenance.

[0025] In this embodiment, a surface drain pipe 9 is provided on the lower right side of the upper cylinder 1. During boiler operation, the surface drain pipe 9 can be opened every 24 hours to check for foreign objects in the boiler water.

[0026] In this embodiment, a drain pipe 10 is provided at the bottom right side of the lower cylinder 19, and a drain valve 16 is provided at the bottom left side of the lower cylinder.

[0027] In this embodiment, compressed air blows up the tar at the bottom of the furnace through compressed air pipe 17. The pressure of the compressed air is not less than 0.4 MPa. Example

[0028] In practical use, the natural gas automatic control valve 12 on the natural gas pipe 11 is first opened. At this time, the biomass gas automatic control valve 14 on the biomass gas pipe 13 is in the closed state. The natural gas is burned in the furnace 18 through the burner head 15. The heat generated can boil the water in the upper cylinder 1 and the lower cylinder 19. The generated steam is transported to the next process through the main steam valve 3. Example

[0029] First, open the biomass gas control valve 14 on the biomass gas pipe 13. At this time, the natural gas control valve 12 on the natural gas pipe 11 is in the closed state. The biomass gas is burned in the furnace 18 through the burner head 15. The heat generated can boil the water in the upper cylinder 1 and the lower cylinder 19. The generated steam is transported to the next process through the main steam valve 3. Example

[0030] First, open the natural gas automatic control valve 12 on the natural gas pipe 11, controlling its opening to 30%. The natural gas passes through the burner head 15 and burns in the furnace 18. Simultaneously, slowly open the biomass gas automatic control valve 14 on the biomass gas pipe 13, controlling its opening according to the amount of steam required for boiler production, generally between 20% and 50%. At this time, the natural gas and biomass gas mix and burn in the furnace 18. The heat generated can boil the water in the upper cylinder 1 and lower cylinder 19, and the generated steam is transported to the next process through the main steam valve 3.

[0031] When the boiler needs maintenance, the drain pipe 10 and drain valve 16 should be opened in advance to drain the hot water in the lower cylinder 19. After ensuring safety, maintenance work can be carried out.

[0032] It should be noted that in this document, terms such as "left" and "right" only indicate different relative positions, and are not necessarily "left" or "right" on the actual device. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] 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 combinations 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 dual fuel biomass gas boiler, characterized by: Including upper cylinder, the lower portion of upper cylinder is provided with hearth, the left side of hearth is provided with combustion lamp holder, the lower portion of hearth is provided with lower cylinder, the left side of combustion lamp holder is connected with natural gas pipe, natural gas pipe is provided with natural gas automatic control valve, the lower portion of combustion lamp holder is connected with biomass gas pipe, biomass gas pipe is provided with biomass gas automatic control valve, the left side middle portion of lower cylinder is connected with compressed air pipe, the left side middle lower portion of upper cylinder is provided with dosing pipe, the bottom of hearth is provided with tar collecting groove.

2. A dual fuel biomass gas boiler as claimed in claim 1, wherein: The medicament in the dosing pipe is ethylenediamine tetraacetic acid.

3. A dual fuel biomass gas boiler as claimed in claim 1, wherein: The left side of upper cylinder is mounted with liquid level meter, the liquid level meter includes liquid level column, liquid level high limit pipe and liquid level low limit pipe, liquid level high limit pipe and liquid level low limit pipe are horizontally arranged, liquid level column is perpendicular to liquid level high limit pipe and liquid level low limit pipe.

4. A dual fuel biomass gas boiler as claimed in claim 1, wherein: The top right side of upper cylinder is provided with first pressure gauge, the left side of first pressure gauge is provided with main steam valve, the left side of main steam valve is provided with auxiliary steam valve, the left side of auxiliary steam valve is provided with safety valve, the left side of safety valve is provided with second pressure gauge.

5. A dual fuel biomass gas boiler as claimed in claim 1, wherein: The right side middle lower portion of upper cylinder is provided with surface blowdown pipe.

6. A dual fuel biomass gas boiler as claimed in claim 1, wherein: The right side bottom of lower cylinder is provided with blowdown pipe, the left side bottom of lower cylinder is provided with blowdown valve.

7. A dual fuel biomass gas boiler as claimed in claim 1, wherein: Compressed air blows tar at the bottom of hearth through compressed air pipe.

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