Pulverized coal and natural gas dual-fuel boiler

Abstract

The pulverized coal and natural gas dual-fuel boiler comprises an upper barrel body, a combustion lamp holder, a hearth and a lower barrel body, the hearth is arranged below the upper barrel body, the left side of the hearth is connected with the combustion lamp holder, the lower barrel body is arranged below the hearth, a distribution table is arranged on the right side in the hearth, and the distribution table is connected with the combustion lamp holder. The distribution table is connected with a compressed air pipe, and the compressed air pipe penetrates through the hearth and extends rightwards to be connected with a compressed air tank. The boiler is simple in structure and convenient to operate, can better overcome the defects in the prior art, meets the requirements of the boiler market, and creates better economic benefits.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, specifically to a dual-fuel boiler for pulverized coal and natural gas. Background Technology

[0002] A pulverized coal boiler is a commonly used energy conversion device. Its working principle is to input pulverized coal into the boiler and then burn the pulverized coal to output heat energy.

[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 boiler that uses pulverized coal and natural gas. Utility Model Content

[0005] In response to the shortcomings of existing technologies, the inventors, based on their extensive experience in the boiler field, developed a dual-fuel boiler that can operate on pulverized coal and natural gas.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a pulverized coal and natural gas dual-fuel boiler, comprising an upper cylinder, a burner head, a furnace, and a lower cylinder. The furnace is located below the upper cylinder, and the burner head is connected to the left side of the furnace. The lower cylinder is located below the furnace. A distribution platform is provided on the right side inside the furnace, and the distribution platform is connected to a compressed air pipe. The compressed air pipe extends through the furnace to the right and connects to a compressed air tank.

[0007] Furthermore, a first pressure gauge is installed on the top left side of the upper cylinder. A first safety valve is installed to the right of the first pressure gauge. A main steam valve is installed to the right of the first safety valve. An auxiliary steam valve is installed to the right of the main steam valve. A second safety valve is installed to the right of the auxiliary steam valve. A second pressure gauge is installed to the right of the second safety valve. When the main steam valve malfunctions, steam can be temporarily supplied through the auxiliary steam valve. Simultaneously, the main steam valve should be repaired as soon as possible.

[0008] Furthermore, a level gauge for observing the liquid level in the upper cylinder is provided on the left side of the upper cylinder.

[0009] Furthermore, a natural gas pipe is connected to the left side of the burner head, and a natural gas self-control valve is installed on the natural gas pipe. A pulverized coal pipe is connected to the top of the burner head, and a pulverized coal pipe self-control valve is installed on the pulverized coal pipe.

[0010] Furthermore, a dosing pipe is located on the left side of the upper cylinder, below the level gauge, and a first drain pipe is located at the bottom right side of the upper cylinder. The chemical in the dosing pipe is ethylenediaminetetraacetic acid (EDTA). Adding appropriate amounts of this chemical to the boiler can prevent scale formation.

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

[0012] Furthermore, the distribution table is provided with a plurality of nozzles, which are connected to the distribution table by threads.

[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 pulverized coal, natural gas, or a mixture of the two fuels.

[0015] 2. A distribution platform is installed on the right side inside the furnace. The distribution platform is connected to a compressed air pipe, which extends through the furnace to the right and connects to a compressed air tank. Compressed air is blown into the furnace through the distribution platform, allowing the pulverized coal to burn completely and effectively improving combustion efficiency.

[0016] 3. This utility model has a simple structure and is easy to operate. It can effectively solve the shortcomings of the existing technology, meet the needs of the boiler market, and create better economic benefits. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is the right view of the present invention.

[0019] Figure 3 This is a schematic diagram of the distribution station.

[0020] Reference numerals: 1. Upper cylinder, 2. First pressure gauge, 3. First safety valve, 4. Main steam valve, 5. Auxiliary steam valve, 6. Second safety valve, 7. Second pressure gauge, 8. Level gauge, 9. Dosing pipe, 10. First drain pipe, 11. Second drain pipe, 12. Third drain pipe, 13. Lower cylinder, 14. Burner head, 15. Pulverized coal pipe, 16. Pulverized coal pipe automatic control valve, 17. Natural gas pipe, 18. Natural gas automatic control valve, 19. Compressed air tank, 20. Compressed air pipe, 21. Compressed air automatic control valve, 22. Nozzle, 23. Distribution platform, 24. Furnace. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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

[0025] like Figures 1-3 As shown, a dual-fuel boiler for pulverized coal and natural gas includes an upper cylinder, a burner head 14, a furnace 24, and a lower cylinder 13. The furnace 24 is located below the upper cylinder 13. The burner head 14 is connected to the left side of the furnace 24. The lower cylinder 13 is located below the furnace 24. A distribution platform 23 is located on the right side inside the furnace 24. The distribution platform 23 is connected to a compressed air pipe 20. The compressed air pipe 20 extends through the furnace 24 to the right and connects to a compressed air tank 19.

[0026] In this embodiment, a first pressure gauge 2 is provided on the top left side of the upper cylinder 1, a first safety valve 3 is provided on the right side of the first pressure gauge 2, a main steam valve 4 is provided on the right side of the first safety valve 3, an auxiliary steam valve 5 is provided on the right side of the main steam valve 4, a second safety valve 6 is provided on the right side of the auxiliary steam valve 5, and a second pressure gauge 7 is provided on the right side of the second safety valve 6.

[0027] In this embodiment, a level gauge 8 for observing the liquid level in the upper cylinder 1 is provided on the left side of the upper cylinder 1.

[0028] In this embodiment, a natural gas pipe 17 is connected to the left side of the burner head 14, and a natural gas self-control valve 18 is provided on the natural gas pipe 17. A pulverized coal pipe 15 is connected to the top of the burner head 14, and a pulverized coal pipe self-control valve 16 is provided on the pulverized coal pipe 15.

[0029] In this embodiment, a dosing pipe 9 is provided on the left side of the upper cylinder 1, and the dosing pipe 9 is located below the level gauge 8. A first drain pipe 10 is provided at the bottom right side of the upper cylinder 1. The chemical in the dosing pipe 9 is ethylenediaminetetraacetic acid (EDTA). Adding appropriate amounts of this chemical to the boiler can prevent scale formation.

[0030] In this embodiment, a second drain pipe 11 is provided at the bottom left side of the lower cylinder 13, and a third drain pipe 12 is provided at the bottom right side of the lower cylinder 13.

[0031] In this embodiment, the distribution table 23 is provided with a plurality of nozzles 22, and the nozzles 22 are connected to the distribution table 23 by threads. Example

[0032] In practical use, the natural gas automatic control valve 18 on the natural gas pipe 17 is first opened, while the pulverized coal pipe automatic control valve 16 on the pulverized coal pipe 15 is closed. The natural gas is burned in the furnace 24 through the burner head 14, and the heat generated can boil the water in the upper cylinder 1 and the lower cylinder 13. The generated steam is transported to the next process through the main steam valve 4. Example

[0033] First, open the pulverized coal pipe automatic control valve 16 on the pulverized coal pipe 15. At this time, the natural gas automatic control valve 18 on the natural gas pipe 17 is in the closed state. The pulverized coal is burned in the furnace 24 through the burner head 14. The heat generated can boil the water in the upper cylinder 1 and the lower cylinder 13. The generated steam is transported to the next process through the main steam valve 4. When the pulverized coal is burning in the furnace 24, the compressed air automatic control valve 21 can be opened. Compressed air enters the furnace 24 through the distribution platform 23, thereby enabling the pulverized coal to burn completely. Example

[0034] First, open the natural gas automatic control valve 18 on the natural gas pipe 17, controlling its opening degree to 30%. The natural gas passes through the burner head 14 and burns in the furnace 24. Simultaneously, slowly open the pulverized coal pipe automatic control valve 16 on the pulverized coal pipe 15, controlling its opening degree according to the boiler's steam production volume, generally between 20% and 40%. At this time, the natural gas and pulverized coal mix and burn in the furnace 24. The heat generated can boil the water in the upper cylinder 1 and lower cylinder 13, and the generated steam is transported to the next process through the main steam valve 4.

[0035] When the boiler needs maintenance, the first drain pipe 10, the second drain pipe 11 and the third drain pipe 12 should be opened in advance to drain the hot water in the upper cylinder 1 and the lower cylinder 13. After ensuring safety, maintenance work can be carried out.

[0036] 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 dual-fuel boiler for pulverized coal and natural gas, characterized in that: It includes an upper cylinder, a burner head, a furnace chamber, and a lower cylinder. The furnace chamber is located below the upper cylinder. The burner head is connected to the left side of the furnace chamber. The lower cylinder is located below the furnace chamber. A distribution platform is located on the right side inside the furnace chamber. The distribution platform is connected to a compressed air pipe. The compressed air pipe extends through the furnace chamber to the right and connects to a compressed air tank.

2. The pulverized coal and natural gas dual-fuel boiler according to claim 1, characterized in that: A first pressure gauge is provided on the top left side of the upper cylinder. A first safety valve is provided on the right side of the first pressure gauge. A main steam valve is provided on the right side of the first safety valve. An auxiliary steam valve is provided on the right side of the main steam valve. A second safety valve is provided on the right side of the auxiliary steam valve. A second pressure gauge is provided on the right side of the second safety valve.

3. The pulverized coal and natural gas dual-fuel boiler according to claim 1, characterized in that: A level gauge for observing the liquid level in the upper cylinder is installed on the left side of the upper cylinder.

4. A dual-fuel boiler for pulverized coal and natural gas according to claim 1, characterized in that: The left side of the burner head is connected to a natural gas pipe, which is equipped with a natural gas self-control valve. The top of the burner head is connected to a pulverized coal pipe, which is equipped with a pulverized coal pipe self-control valve.

5. A dual-fuel boiler for pulverized coal and natural gas according to claim 1, characterized in that: A dosing pipe is provided on the left side of the upper cylinder, which is located below the level gauge, and a first drain pipe is provided at the bottom right side of the upper cylinder.

6. A dual-fuel boiler for pulverized coal and natural gas according to claim 1, characterized in that: A second drain pipe is provided at the bottom left side of the lower cylinder, and a third drain pipe is provided at the bottom right side of the lower cylinder.

7. A dual-fuel boiler for pulverized coal and natural gas according to claim 1, characterized in that: The distribution table is equipped with several nozzles, which are connected to the distribution table via threads.

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