Gasification furnace burner

Abstract

The utility model discloses a gasification furnace burner which comprises a burner body, a plurality of material channels are arranged in the burner body from inside to outside, the material channel located on the outermost layer is a cooling water jacket flow channel and a double-protection flow channel adjacent to the cooling water jacket flow channel, and the double-protection flow channel is a double-protection flow channel adjacent to the cooling water jacket flow channel. The double-protection flow channel comprises a first flow channel and a second flow channel which are used for spraying steam from outside to inside, a material channel in the middle of the burner body is used for spraying combustible materials, and the burner has the technical advantages that the operation cycle of the gasifier burner can be prolonged, and ablation leakage of a cooling water jacket of the burner can be reduced or avoided.

Description

Technical Field

[0001] The utility model relates to a burner, more specifically to a gasification furnace burner, belonging to the field of petrochemical industry. Background Art

[0002] The burner is one of the core components of a gasifier. It has multiple flow channels and can carry combustible media such as oil, oil slurry, pulverized coal, coal slurry, slurry, and natural gas. A flame is formed by spraying oxygen and combustible media from the burner head through different flow channels and proportions. The burner head is designed with a cooling water jacket that cools the burner with cooling water to protect it from overheating and damage. Currently, high-temperature erosion and leakage of the cooling water jacket, which causes the gasifier to shut down, is the biggest hidden danger affecting the safe and stable operation of the gasifier. How to ensure the cooling water jacket operates smoothly at high temperatures without leakage has become a key issue in design and manufacturing. Utility Model Content

[0003] In order to solve the above-mentioned problems in the prior art, the utility model provides a gasifier burner with technical features such as being able to extend the operating cycle of the gasifier burner and reduce or avoid ablation and leakage of the burner cooling water jacket.

[0004] In order to achieve the above purpose, the present invention is implemented through the following technical solutions:

[0005] A gasification furnace burner includes a burner body. From the inside out, multiple material channels are provided in the burner body, wherein the material channel located on the outermost layer is a cooling water jacket flow channel, and a double protection flow channel adjacent to the cooling water jacket flow channel, from the outside in, the double protection flow channel includes a first flow channel and a second flow channel for injecting steam, and the material channel in the middle of the burner body is used for injecting combustible materials.

[0006] Preferably, the distance between the outlet where the first flow channel and the second flow channel merge and the outlet of the burner body is 5-30 mm so as to achieve a flow rate greater than 30 m / s.

[0007] Preferably, the distance between the top of the cooling water jacket flow channel and the outlet of the burner body is 2-10 mm.

[0008] Preferably, the material channel is divided into several tapered parts.

[0009] Preferably, the head of the tapered portion is provided with a rounded chamfer.

[0010] Beneficial effects: The structure is simple and practical, and the operation cycle of the gasifier burner can be extended, and the erosion and leakage of the burner cooling water jacket can be reduced or avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1It is a partial sectional view of the utility model. DETAILED DESCRIPTION

[0012] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

[0013] like Figure 1 The figure shows a specific embodiment of a gasifier burner. This embodiment includes a burner body 1, which is provided with multiple material channels from the inside out. The outermost material channel is a cooling water jacket channel 2. Adjacent to the cooling water jacket channel 2 are dual protective channels, which, from the outside in, include a first channel 3 and a second channel 4 for injecting steam. The material channel in the middle of the burner body 1 is for injecting combustible materials. The outlet where the first and second channels 3 and 4 meet is 5-30 mm away from the burner body 1 outlet, enabling a flow rate exceeding 30 m / s. The top of the cooling water jacket channel 2 is 2-10 mm away from the burner body 1 outlet.

[0014] The technical solution of this application can avoid high-temperature ablation damage to the burner cooling water jacket, increase the gas flow rate in the flow channel adjacent to the cooling water jacket, enhance the convective heat transfer coefficient, strengthen heat transfer, and reduce direct contact between the high-temperature flame and the cooling water jacket.

[0015] Specifically: the first and second flow channels of the double protection flow channel are designed. At the head of the burner body 1, the double protection flow channels are merged to increase the flow rate and velocity of the protection gas and reduce the probability of the burner cooling water jacket being eroded and leaking. The first and second flow channels are merged at a distance of 5-30 mm from the end of the burner (the distance is as follows: Figure 1 Marked with B in the middle), ensure that the flow rate is greater than 30 m / s, and the use of shielding steam or protective steam can be used for cooling. At the same time, ensure that there is a 2-10 mm drop from the top of the cooling water jacket flow channel 2 to the burner head (the distance is as follows Figure 1 (marked with A in the middle).

[0016] The technical solution of the present invention is applicable to: 1) various types of gasifiers with four-channel, five-channel, six-channel, seven-channel and other multi-channel burners; 2) oil gasification, including gasification of various oil-containing substances such as light oil, heavy oil, residual oil, asphalt oil, slurry bed oil residue, coal tar, coking oil slurry, ethylene tar, biomass oil, recycled oil, etc.; 3) coal gasification, including pulverized coal gasification, water-coal slurry gasification, multi-material slurry gasification, etc., which mainly use coal as raw material.

[0017] In a preferred embodiment, the material channel is divided into several tapered sections. The heads of the tapered sections are rounded chamfered. The combination of the tapered shape and the smooth transition accelerates airflow diffusion, enhancing the surface convective heat transfer coefficient of the cooling water jacket, thereby preventing overheating and damage to the cooling water jacket.

[0018] Finally, it should be noted that the present invention is not limited to the above embodiments and may be subject to many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art should be considered to be within the scope of protection of the present invention.

Claims

1. A gasifier burner, characterized in that: The burner body (1) comprises a burner body (1), wherein a plurality of material channels are provided in the burner body (1) from the inside out, wherein the material channel located in the outermost layer is a cooling water jacket flow channel (2), and a double protection flow channel adjacent to the cooling water jacket flow channel (2) comprises, from the outside inward, a first flow channel (3) and a second flow channel (4) for injecting steam, and the material channel in the middle of the burner body (1) is for injecting combustible materials.

2. The gasifier burner according to claim 1, characterized in that: The distance between the outlet where the first flow channel (3) and the second flow channel (4) merge and the outlet of the burner body (1) is 5-30 mm so as to achieve a flow rate greater than 30 m / s.

3. The gasifier burner according to claim 2, characterized in that: The distance between the top of the cooling water jacket flow channel (2) and the outlet of the burner body (1) is 2-10 mm.

4. A gasification furnace burner according to any one of claims 1 to 3, characterized in that: The material channel is divided into a plurality of tapered parts.

5. The gasification furnace burner according to claim 4, characterized in that: The head of the tapered portion is provided with a rounded chamfer.

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