A coal gasification furnace preheating burner device

Abstract

The utility model relates to the technical field of coal gasifiers, and in particular to a coal gasifier preheating burner device, comprising a gasifier for burning natural gas, and also comprising: a combustion head, located in the gasifier; a natural gas pipeline, connected to the combustion head to transport natural gas; an air duct, connected to the gasifier, used to flow air into the gasifier, the connection port of the air duct and the gasifier being located above the combustion head; and an adjusting damper, arranged in connection with the air duct, used to adjust the amount of air entering. The utility model solves the problems that the existing burner is easy to ablate and deform and needs to be manually adjusted for the amount of air entering, and achieves that the burner is not easy to ablate, and by automatically adjusting the amount of air entering, the labor intensity of manual labor is reduced, and the combustion efficiency of the baking furnace is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal gasifiers, in particular to a preheating burner device for a coal gasifier. Background Art

[0002] The preheating burner of the gasifier is a key equipment in the coal gasification device. It is used to heat up the gasifier before starting up. It is required to heat up the gasifier to the specified temperature. Before each start-up of the gasifier, the preheating burner must be used to heat the gasifier to above 1200℃. The operating environment of the preheating burner is relatively poor, and it is in a harsh environment of high temperature and high corrosion.

[0003] The existing gasifier preheating burner structure is basically composed of an adjustable damper, an induced draft duct, a fuel gas gun, a burner head and other parts. In the prior art, the preheating burner burner head is made of ordinary carbon steel, the melting point of which is 1300-1350 ℃ and the thickness is 2mm. During the gasifier baking process, the gasifier is under negative pressure, air enters the gasifier through the induced draft duct, and natural gas enters the burner head through the fuel gas gun. It burns at the burner head, and the flame temperature can reach more than 1400 degrees. The burner head is eroded and ablated by the flame, deformed and damaged, which causes the preheating burner to fail, resulting in the inability of the gasifier to heat up, affecting the stability of production operation. The preheating burner controls the amount of air entering the gasifier by manually adjusting the opening of the adjustable damper. At the same time, the damper is manually adjusted, and during the heating process, personnel need to frequently adjust the opening on site, which has a high labor intensity. Failure to adjust in time can also easily cause incomplete combustion of natural gas, black smoke in the gasifier, and environmental pollution.

[0004] For example, Chinese patent CN210458071U discloses a coal gasification furnace burner, including a burner body, and the burner and the cooling water trough are integrated milling parts, the sealing plate of the cooling water trough is welded inside the burner, and there is no weld on the fire-facing surface of the burner. Under high temperature conditions of 1300°C, the service life of the outer burner can be effectively extended, the number of maintenance times can be reduced, and production efficiency can be improved; however, in order to prevent the burner from being ablated and deformed and damaged due to the scouring of the flame, it is necessary to cool down the burner through the cooling water trough, which makes the burner structure more complicated and its combustion cost higher.

[0005] Therefore, the utility model provides a preheating burner device for a coal gasification furnace. Utility Model Content

[0006] The purpose of the utility model is to propose a preheating burner device for a gasification furnace, which solves the problems that the existing burner is prone to ablation and deformation and requires manual adjustment of the amount of air entering, thereby making the burner less likely to ablate, and by automatically adjusting the amount of air entering, reducing the labor intensity of manual labor and greatly improving the combustion efficiency of the baking furnace.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a coal gasification furnace preheating burner device, including a gasification furnace for burning natural gas, and also including:

[0008] a combustion head, located in the gasifier;

[0009] a natural gas pipeline connected to the burner head for transporting natural gas;

[0010] an air duct connected to the gasifier and used to flow air into the gasifier, wherein a connection port between the air duct and the gasifier is located above the burner head;

[0011] The regulating damper is connected to the air duct and is used to adjust the amount of air entering.

[0012] Preferably, the burner head is tetragonal zirconia polycrystalline ceramic.

[0013] Preferably, the burner head comprises:

[0014] a cylinder connected to the natural gas pipeline;

[0015] A burner nozzle is connected to the bottom of the cylinder, the burner nozzle is a bowl-shaped structure, the maximum diameter of the burner nozzle is 220 mm, and the burner nozzle is evenly arranged with 8 ventilation holes.

[0016] Preferably, the natural gas pipeline is provided with a gas flame arrester and a natural gas flow meter.

[0017] Preferably, an air inlet flame arrester is provided on the air duct.

[0018] Preferably, the inner wall of the cylinder is provided with a plurality of clamping blocks, the natural gas pipeline is provided with a plurality of clamping grooves, and the clamping blocks extend into the clamping grooves for locking.

[0019] Beneficial effects of the utility model:

[0020] 1. The utility model provides a combustion head and an adjusting air door on the gasification furnace, and the combustion head can make the burner less prone to ablation, so that the burner structure is simple and light, maintenance and use are convenient, cost investment is low, the anti-ablation effect is better, the service life of the burner is extended, and the air intake amount is automatically adjusted by adjusting the air door, which reduces the labor intensity of manual labor and greatly improves the combustion efficiency of the oven.

[0021] 2. The utility model provides ventilation holes on the burner nozzle on the burner head, and the air at the ventilation holes is preliminarily mixed with the natural gas at the preheating burner head, so that the natural gas can be fully burned and the combustion efficiency is improved.

[0022] 3. The utility model provides an adjustable damper on the air duct, sets the damper size, calculates the amount of natural gas and the negative pressure of the gasifier, automatically adjusts to the corresponding damper opening, maintains the oxygen-rich combustion state of the natural gas, improves the efficiency of the oven, reduces the labor intensity of the personnel, and greatly improves the combustion efficiency of the oven. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the whole of the utility model.

[0024] Figure 2 It is a schematic diagram of the combustion head of the utility model.

[0025] In the figure: 1. gasifier; 2. combustion head; 21. cylinder; 211. block; 22. burner nozzle; 23. vent; 3. natural gas pipeline; 31. gas flame arrester; 32. natural gas flow meter; 33. slot; 4. air duct; 41. air inlet flame arrester; 5. damper adjustment. DETAILED DESCRIPTION

[0026] The following is a further description of the method of use of the present invention in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figure 1 and Figure 2 As shown, a coal gasifier preheating burner device includes a gasifier 1 for burning natural gas, and also includes:

[0028] A combustion head 2, located in the gasification furnace 1;

[0029] A natural gas pipeline 3 connected to the burner head 2 for transporting natural gas;

[0030] an air duct 4 connected to the gasifier 1 and used for flowing air into the gasifier 1, wherein a connection port between the air duct 4 and the gasifier 1 is located above the burner head 2;

[0031] The regulating damper 5 is connected to the air duct 4 and is used to adjust the amount of air entering.

[0032] The burner head 2 is tetragonal zirconia polycrystalline ceramic with a wall thickness of 10 mm. The material has a melting point greater than 2370°C, and has the advantages of high toughness, high bending strength and high wear resistance, excellent thermal insulation performance, and a thermal expansion coefficient close to that of steel. It is integrally formed during module processing and has a small dimensional error.

[0033] The combustion head 2 comprises:

[0034] Cylinder 21, connected to the natural gas pipeline 3;

[0035] The burner 22 is connected to the bottom of the cylinder 21 and is used for the outflow of natural gas to fully contact and burn with air.

[0036] The burner 22 is a bowl-shaped structure, the maximum diameter of the burner 22 is 220 mm, and eight vents 23 are evenly arranged around the burner 22. The vents 23 can stabilize the flame and enhance the mixing effect of air and natural gas, so as to keep the flame shape stable.

[0037] The vent 23 is in the shape of an oblong. When the gasifier 1 is baking, there is negative pressure inside the gasifier 1, and air enters the burner 22 from the air inlet of the natural gas pipeline 3. When reaching the burner 22, the bowl-shaped structure of the burner 22 makes the air flow stable and reduces turbulence. Part of the air enters the burner 22 from the vent 23 on the burner 22. When the burner head 2 delivers natural gas for combustion, the air from the vent 23 is preliminarily mixed with the natural gas in the burner 22, so that the natural gas can be fully burned and the combustion efficiency is improved. The air entering the burner 22 forms 8 airflows, which can stabilize the flame of the natural gas combustion and prevent biased burning.

[0038] The natural gas pipeline 3 is provided with a gas flame arrester 31 and a natural gas flow meter 32 . The gas flame arrester 31 is located at the top of the natural gas pipeline 3 . The gas flame arrester 31 prevents the natural gas inside the natural gas pipeline 3 from burning.

[0039] The natural gas flow meter 32 is used to control the flow of natural gas so that the natural gas can be fully burned on the burner 22 .

[0040] The air duct 4 is provided with an air inlet flame arrester 41 to prevent the negative pressure of the gasifier 1 from disappearing suddenly and to prevent the flame from returning from the air inlet duct 4.

[0041] The inner wall of the cylinder 21 is provided with a plurality of clamping blocks 211 , and the natural gas pipeline 3 is provided with a plurality of clamping grooves 33 . The clamping blocks 211 extend into the clamping grooves 33 for locking, so as to fix the burner head 2 and the natural gas pipeline 3 .

[0042] Working process: During combustion, natural gas flows into the natural gas pipeline 3 through the natural gas flow meter 32, flows into the burner head 2 through the natural gas pipeline 3, and enters the burner nozzle 22 from the burner head 2. At the same time, air flows in from the air duct and passes through the damper 5. The size of the damper 5 is controlled by the central control DCS system. The air enters the burner nozzle 22 and forms 8 air flows. The air enters the burner nozzle 22 and automatically adjusts to the corresponding damper opening by calculating the amount of natural gas and the negative pressure of the gasifier 1, maintaining the oxygen-rich combustion state of the natural gas, and contacts and burns with the natural gas flowing out of the burner head 2, so that the natural gas is fully burned.

[0043] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coal gasifier preheating burner device, comprising a gasifier (1) for burning natural gas, characterized in that: Also includes: A combustion head (2) located in the gasifier (1); A natural gas pipeline (3) connected to the burner head (2) for transporting natural gas; an air duct (4) connected to the gasifier (1) and used for flowing air into the gasifier (1), wherein a connection port between the air duct (4) and the gasifier (1) is located above the burner head (2); The regulating damper (5) is connected to the air duct (4) and is used to regulate the amount of air entering.

2. A coal gasification furnace preheating burner device according to claim 1, characterized in that: The burner head (2) is tetragonal zirconia polycrystalline ceramic.

3. A coal gasification furnace preheating burner device according to claim 1, characterized in that: The combustion head (2) comprises: A cylinder (21) connected to the natural gas pipeline (3); A burner nozzle (22) is connected to the bottom of the cylinder (21); the burner nozzle (22) is a bowl-shaped structure; the maximum diameter of the burner nozzle (22) is 220 mm; and the burner nozzle (22) is evenly arranged with eight ventilation holes (23).

4. A coal gasification furnace preheating burner device according to claim 1, characterized in that: The natural gas pipeline (3) is provided with a gas flame arrester (31) and a natural gas flow meter (32).

5. A coal gasification furnace preheating burner device according to claim 1, characterized in that: The air duct (4) is provided with an air inlet flame arrester (41).

6. A coal gasification furnace preheating burner device according to claim 3, characterized in that: The inner wall of the cylinder (21) is provided with a plurality of clamping blocks (211), the natural gas pipeline (3) is provided with a plurality of clamping grooves (33), and the clamping blocks (211) extend into the clamping grooves (33) for locking.

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