Coal burner for gasification furnace

Abstract

The utility model relates to a coal burner for a gasifier. The coal burner comprises a gasifying agent channel and a pulverized coal channel, the gasifying agent channel is located on the outer side, the pulverized coal channel is located on the inner side, the pulverized coal outlet is a rectangular outlet, and the gasifying agent outlet is a rectangular outlet; the gasifying agent outlet is adjacent to the pulverized coal outlet; the two gasifying agent channels are located on the two sides of the pulverized coal channel. The number of the gasifying agent outlets is two, and the two rectangular gasifying agent outlets are located on the two sides of the pulverized coal outlet. The gasifying agent outlet is inclined towards the pulverized coal outlet; a protective water channel is arranged between the gasifying agent channel and the pulverized coal channel; and the protective water channel is spirally wound on the outer side of the lower part of the pulverized coal channel. The device is simple in structure, easy to manufacture, high in use reliability and convenient to improve the treatment capacity; and under the condition of the same outlet speed of the pulverized coal and the gasifying agent, the mixing effect of the pulverized coal and the gasifying agent is better, and the carbon conversion rate is higher.

Description

Technical Field

[0001] The utility model relates to a coal burner applied to a gasifier, belonging to the technical field of burners. Background Technique

[0002] With the acceleration of the industrialization process and the increasing energy demand, as one of the main energy sources, the clean utilization of coal has become an urgent task. By adopting advanced coal clean utilization technologies, the pollutant emissions generated during coal combustion can be effectively reduced, the energy utilization efficiency can be improved, and the negative impact on the environment can be reduced. This not only helps to improve air quality and protect the ecological environment, but also promotes the optimization and upgrading of the energy structure and the sustainable development of the economic society.

[0003] In the process of coal gasification, as a key component, the performance of the coal burner directly affects the gasification efficiency and stability of the gasifier. Traditional coal burners for coal gasifiers have problems such as complex structures, difficulty in increasing the throughput, and long mixing time of the gasifying agent and pulverized coal.

[0004] To solve the above problems, many improved structures for burners have emerged, such as a wear-resistant gasifier burner for increasing flame intensity with the Chinese patent publication number CN211522128U, a burner applied to a gasifier with the Chinese patent publication number CN218561367U, a gasification burner and a gasifier with the Chinese patent publication number CN220149499U, and a high-efficiency gasification burner with pulverized coal premixing and its usage method with the Chinese patent publication number CN109575997B. However, the above burner product structures are either too complex or have poor durability.

[0005] Therefore, aiming at the usage requirements of the gasifier, the structure of the coal burner still needs to be improved. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a coal burner for a gasifier, which improves the specific structure of the burner, especially changes the outlet part of the burner into a square structure, thereby improving the contact and mixing effect between pulverized coal particles and the gasifying agent, increasing the carbon conversion rate, and the volume ratios of CO and H2 at the outlet.

[0007] To achieve the above utility model purpose, the utility model provides a coal burner for a gasifier, including a gasifying agent channel and a pulverized coal channel;

[0008] The gasifying agent channel is located on the outside, with a gasifying agent inlet above and a gasifying agent outlet at the bottom;

[0009] The pulverized coal channel is located on the inside, with a pulverized coal inlet above and a pulverized coal outlet at the bottom;

[0010] The pulverized coal outlet is a rectangular outlet, and the gasifying agent outlet is a rectangular outlet; the gasifying agent outlet is adjacent to the pulverized coal outlet.

[0011] As a further improvement of the present utility model, there are 2 gasifying agent channels, located on both sides of the pulverized coal channel;

[0012] There are 2 gasifying agent outlets, and the two rectangular gasifying agent outlets are located on both sides of the pulverized coal outlet.

[0013] Furthermore, the width of the gasifying agent outlet is greater than or equal to the width of the pulverized coal outlet.

[0014] Furthermore, the gasifying agent outlet is inclined towards the pulverized coal outlet.

[0015] As a further improvement of the present utility model, a protective water channel is provided between the gasifying agent channel and the pulverized coal channel;

[0016] The protective water channel has a protective water inlet and a protective water outlet.

[0017] Furthermore, the protective water channel is spirally wound around the outer side of the lower part of the pulverized coal channel.

[0018] A coal burner for a gasifier of the present utility model has a simple structure, is easy to manufacture, has high use reliability, and is also convenient for increasing the throughput. A coal burner for a gasifier of the present utility model has a better mixing effect of pulverized coal and gasifying agent and a higher carbon conversion rate under the condition of the same outlet speeds of pulverized coal and gasifying agent.

[0019] A coal burner for a gasifier of the present utility model, by setting both the gasifying agent outlet and the pulverized coal outlet as rectangles, such a structure is easy to manufacture and increases the effective area, which can improve the throughput; and gasifying agent outlets are arranged on both sides of the pulverized coal outlet, this structure enables the pulverized coal and the gasifying agent to be quickly and evenly mixed, increases the initial contact area between the pulverized coal and the gasifying agent, and improves the mixing efficiency; and through the inclined design of the gasifying agent outlet, the mixing effect of the gasifying agent and the pulverized coal is further enhanced; by increasing the mixing rate of the pulverized coal and the gasifying agent, finally the carbon conversion rate during combustion is higher, and the volume ratios of CO and H2 at the outlet are also higher, and the combustion calorific value is higher.

[0020] By setting a spiral protective water channel, the coal burner is further protected and the use reliability is improved. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of a coal burner for a gasifier of the present utility model;

[0022] Figure 2 It is a schematic diagram of the structure of the outlet part of a coal burner for a gasifier of the present utility model. Detailed Embodiments

[0023] The following further describes in detail the specific embodiments of the present utility model in conjunction with the accompanying drawings.

[0024] As Figure 1 , Figure 2 , a specific structural schematic diagram of a coal burner for a gasifier of the present utility model is given.

[0025] A coal burner for a gasifier of the present utility model includes an oxidant channel 1 and a pulverized coal channel 2.

[0026] The oxidant channel 1 is located on the outside, with an oxidant inlet 11 provided above and an oxidant outlet 12 provided at the bottom.

[0027] The pulverized coal channel 2 is located on the inside, with a pulverized coal inlet 21 provided above and a pulverized coal outlet 22 provided at the bottom.

[0028] The improvement of the present utility model is that the pulverized coal outlet 22 is a rectangular outlet; correspondingly, the oxidant outlet 12 is also a rectangular outlet.

[0029] Furthermore, in order to improve the mixing of the oxidant and the pulverized coal, there are 2 oxidant channels 1, located on both sides of the pulverized coal channel 2; correspondingly, there are 2 oxidant outlets 12, and the 2 rectangular oxidant outlets 12 are also located on both sides of the pulverized coal outlet 22; in this way, the oxidant can be sprayed towards the pulverized coal outlet 22 from both sides simultaneously for more efficient mixing.

[0030] Still further, the oxidant outlet 12 is inclined towards the middle, that is, towards the pulverized coal outlet 22, so that when the oxidant is sprayed out through the oxidant outlet 12, it converges towards the pulverized coal outlet 22, further improving the mixing efficiency. Correspondingly, the pulverized coal channel 2 and the pulverized coal outlet 22 adopt a straight design to better align with the heat source area of the gasifier.

[0031] Furthermore, a protective water channel 3 is provided between the oxidant channel 1 and the pulverized coal channel 2. The protective water channel 3 is spirally wound around the outer side of the lower part of the pulverized coal channel 2. The protective water channel 3 has a protective water inlet 31 and a protective water outlet 32; water at a suitable temperature is introduced into the protective water channel 3, and the water temperature can be adjusted according to the production situation, thereby preventing high-temperature damage or dew point corrosion caused by low temperature and maintaining the burner at a suitable operating temperature.

[0032] A coal burner for a gasifier of the present utility model has a simple structure, is easy to manufacture, has high use reliability, and is also convenient for increasing the throughput.

[0033] A coal burner for a gasifier of the present utility model has been verified that, under the same conditions of the outlet speeds of the pulverized coal and the oxidant, the mixing effect of the pulverized coal and the oxidant is better and the carbon conversion rate is higher. The specific situation is shown in the following table.

[0034] Index (same inlet operating conditions) Circular burner Square burner Average particle residence time 6.45s 5.20s Carbon conversion rate 98.23％ 99.99％ CO mol% 77.99 78.69 H2 mol% 19.07 20.17

[0035] Due to the change in the internal flow of the gasifier, the average residence time of the particles is shortened from 6.45 s to 5.20 s; and due to the change in the nozzle cross-section, the contact between the pulverized coal particles and the gasifying agent is more rapid and sufficient, resulting in an increase in the carbon conversion rate and the volume ratios of CO and H2 at the outlet.

[0036] A coal burner for a gasifier according to the present utility model has the gasifying agent outlet 12 and the pulverized coal outlet 22 both arranged as rectangles, and the gasifying agent outlets 12 are arranged on both sides of the pulverized coal outlet 22. Such a structure is easy to manufacture, increases the effective area, and can improve the throughput; at the same time, this structure enables the pulverized coal and the gasifying agent to be quickly and evenly mixed, increases the initial contact area between the pulverized coal and the gasifying agent, and improves the mixing efficiency; through the inclined design of the gasifying agent outlet 12, the mixing effect of the gasifying agent and the pulverized coal is further enhanced; finally, by providing a spiral protection water channel 3, the coal burner is further protected and the reliability in use is improved.

[0037] The preferred embodiments of the present utility model have been specifically described above, but the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A coal burner for a gasifier, comprising a gasifying agent channel and a coal powder channel; It is characterized in that The gasifying agent channel is located on the outside, with a gasifying agent inlet at the top and a gasifying agent outlet at the bottom; The coal powder channel is located on the inner side, with a coal powder inlet at the top and a coal powder outlet at the bottom; The pulverized coal outlet is a rectangular outlet, and the gasifying agent outlet is a rectangular outlet; the gasifying agent outlet is adjacent to the pulverized coal outlet.

2. A coal burner for a gasifier as claimed in claim 1, characterized in that: There are two gasifying agent channels, located on both sides of the pulverized coal channel; There are two gasifying agent outlets, and the two rectangular gasifying agent outlets are located on both sides of the coal powder outlet.

3. A coal burner for a gasifier as claimed in claim 1 or 2, characterized in that: The width of the gasifying agent outlet is greater than or equal to the width of the coal powder outlet.

4. A coal burner for a gasifier as claimed in claim 1 or 2, characterized in that: The gasifying agent outlet is arranged to be inclined toward the coal powder outlet.

5. A coal burner for a gasifier as claimed in claim 1, characterized in that: A protective water channel is provided between the gasifying agent channel and the pulverized coal channel; The protection water channel has a protection water inlet and a protection water outlet.

6. A coal burner for a gasifier as claimed in claim 5, characterized in that: The protective water channel is spirally wound around the lower outer side of the coal powder channel.

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