A nozzle device for coal water slurry gasifier

Abstract

A kind of coal-water slurry gasifier nozzle device, including coal-water slurry inlet, nozzle channel, cooling device and magnetic stirring paddle;Coal-water slurry inlet and nozzle channel are communicated, and magnetic stirring paddle is arranged in nozzle channel;Cooling device is set outside nozzle channel.This application first applies magnetic stirring paddle to coal-water slurry nozzle, can effectively prevent coking blockage in nozzle channel, and can be adjusted by adjusting the impeller of stirring paddle end head to realize the accurate regulation of coal-water slurry dispersion;Without high pressure water participation, coal-water slurry is not diluted, the energy efficiency level of supercritical water gasification process is not restricted, and heat loss does not occur.

Description

Technical Field

[0001] This invention relates to the field of clean coal utilization, and more particularly to a nozzle device for a coal-water slurry gasifier. Background Technology

[0002] Coal-water slurry gasification technology is of great significance for the clean and efficient utilization of coal. Dispersing and atomizing the high-concentration coal-water slurry before it enters the gasifier can promote complete gasification. In the nozzles of Texaco's coal-water slurry gasifier, oxygen is used as a medium to promote dispersion; previous designs used high-pressure water as an atomizing medium (patent number: ZL2016105703159). However, oxygen and high-pressure water are difficult to apply as atomizing media in supercritical water gasification technology. This is because: Supercritical water gasification does not require oxygen; using high-pressure water as an atomizing medium inevitably reduces the actual concentration of the coal-water slurry, which will limit the energy efficiency of the supercritical water gasification process; furthermore, cold high-pressure water entering the reactor as an atomizing medium will inevitably cause changes in the reactor's temperature field, and the heat absorption of cold water will also result in additional heat loss. Summary of the Invention

[0003] The purpose of this invention is to provide a nozzle device for a coal-water slurry gasifier to solve the problems that the reduction of coal-water slurry concentration will restrict the energy efficiency of the supercritical water gasification process, and that the absorption of heat by cold water will also cause additional heat loss.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A nozzle device for a coal-water slurry gasifier includes a coal-water slurry inlet, a nozzle channel, a cooling device, and a magnetic stirring paddle; the coal-water slurry inlet and the nozzle channel are connected, and the magnetic stirring paddle is disposed inside the nozzle channel; the cooling device is sleeved on the outside of the nozzle channel.

[0006] Furthermore, the cooling device includes an isolation tube and a cooling jacket; the cooling jacket is sealed on the outside of the nozzle channel, the isolation tube is coaxially arranged inside the cooling jacket, and one end of the isolation tube is sealed to the cooling jacket, while the other end has a gap between it and the cooling jacket.

[0007] Furthermore, cooling water is poured into the cooling jacket.

[0008] Furthermore, a cooling water outlet is provided on the cooling jacket; a cooling water inlet is provided on the inner side of the isolation pipe.

[0009] Furthermore, the axis of the agitator coincides with the axis of the nozzle channel.

[0010] Furthermore, the portion of the magnetic stirrer located inside the nozzle channel is threaded.

[0011] Furthermore, an impeller is fitted at the top of the magnetic stirring paddle.

[0012] Furthermore, the impeller blades are triangular, arc-shaped, or straight.

[0013] Furthermore, the tail end of the magnetic stirrer is connected to the drive component via a bearing.

[0014] Compared with the prior art, the present invention has the following technical effects:

[0015] This invention is the first to apply a magnetic stirring paddle to a coal-water slurry nozzle, which can effectively prevent coking and blockage in the nozzle channel, and can achieve precise control of the dispersion of the coal-water slurry by adjusting the impeller at the end of the stirring paddle; without the participation of high-pressure water, the coal-water slurry will not be diluted, the energy efficiency level of the supercritical water gasification process will not be restricted, and there will be no heat loss.

[0016] The magnetic stirring impeller of this invention features adjustable rotation speed, adjustable impeller type at the end, and adjustable number of thread turns and diameter on the stirring screw. These adjustable parameters improve the applicability of the coal-water slurry nozzle.

[0017] In this invention, the entire magnetic stirring paddle is placed inside the nozzle channel, eliminating the need to consider the sealing of rotating components. Attached Figure Description

[0018] Figure 1 This is an example of the nozzle device for the coal-water slurry gasifier of the present invention.

[0019] Figure 2 This is an example of the shape of the impeller at the top of the magnetic stirrer of the present invention.

[0020] Figure 3 This is another example of the shape of the impeller at the tip of the magnetic stirrer of the present invention.

[0021] Figure 4 This is another example of the shape of the impeller at the tip of the magnetic stirrer of the present invention.

[0022] Reference numerals: 1-Coal-water slurry inlet; 2-Nozzle channel; 3-Magnetic agitator; 4-Cooling water inlet; 5-Cooling water outlet; 6-Top of magnetic agitator; 7-Cooling jacket; 8-Isolation pipe. Detailed Implementation

[0023] The technical solutions of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them.

[0024] In this document, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0025] Furthermore, in this article, directional terms such as "upper" and "lower" are defined relative to the orientation of the structure as shown in the attached drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation of the structure.

[0026] This invention is the first to apply a magnetic stirring paddle to a coal-water slurry nozzle, which can effectively prevent coking and blockage in the nozzle channel, and can achieve precise control of the dispersion of the coal-water slurry by adjusting the impeller at the end of the stirring paddle; without the participation of high-pressure water, the coal-water slurry will not be diluted, the energy efficiency level of the supercritical water gasification process will not be restricted, and there will be no heat loss.

[0027] Example

[0028] An example of the nozzle device for a water-coal slurry gasifier provided by the present invention is as follows: Figure 1 As shown. The nozzle device includes a coal-water slurry inlet 1 and a nozzle channel 2, in which a magnetic stirring paddle 3 is disposed. The nozzle device also includes a cooling jacket 7. The cooling jacket is used to cool the nozzle device. The cooling jacket is located outside the nozzle channel. An isolation pipe 8 is provided inside the cooling jacket 7. Cooling is performed using the cooling jacket 7, and the isolation pipe 8 inside the jacket is used to prevent short circuit of the cooling water.

[0029] The nozzle assembly also includes a cooling water inlet 4 and a cooling water outlet 5. The cooling water inlet 4 is located on the side wall of the isolation pipe 8. The cooling water outlet 5 is located on the side wall of the cooling jacket 7.

[0030] The magnetic stirring paddle 3 is placed inside the nozzle channel 2, so there is no need to consider the sealing problem between the rotating part and the fixed part of the magnetic stirring paddle 3, and the axis of the stirring paddle 3 coincides with the axis of the nozzle channel 2.

[0031] An impeller is fitted at the top 6 of the magnetic stirring paddle 3. In this embodiment, the impeller is shaped as follows: Figure 2 As shown.

[0032] In some embodiments of the present invention, the impeller has different shapes, which can be determined according to the specific operating conditions of the gasifier.

[0033] In some embodiments of the present invention, the impeller is shaped as follows: Figure 3 As shown.

[0034] In some embodiments of the present invention, the impeller is shaped as follows: Figure 4 As shown.

[0035] Different dispersion conditions of coal-water slurry can be achieved by adjusting the impeller type and the rotation speed of the magnetic stirring paddle 3.

[0036] The magnetic stirring paddle 3 has threads on the part inside the nozzle channel 2. The threads rotate with the magnetic stirring paddle 3, which can prevent blockage in the nozzle channel 2.

[0037] The dispersion and atomization of coal-water slurry do not require additional media, which reduces the energy loss and flow field fluctuations caused by the introduction of additional media during gasifier operation.

[0038] The above provides a detailed description of the nozzle device for the coal-water slurry gasifier provided in this application. Specific examples have been used to illustrate the principle and embodiments of this application. The description of the embodiments above is only for the purpose of helping to understand the method and core idea of ​​this application. At the same time, for those skilled in the art, there will be changes in specific embodiments and application scope based on the idea of ​​this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A nozzle device for a coal-water slurry gasification furnace, characterized in that, It includes a coal-water slurry inlet (1), a nozzle channel (2), a cooling device, and a magnetic stirring paddle (3); the coal-water slurry inlet (1) and the nozzle channel (2) are connected, and the magnetic stirring paddle (3) is set inside the nozzle channel (2); the cooling device is fitted outside the nozzle channel (2).

2. The nozzle device for a coal-water slurry gasifier according to claim 1, characterized in that, The cooling device includes an isolation tube (8) and a cooling jacket (7); the cooling jacket (7) is sealed on the outside of the nozzle channel (2), the isolation tube (8) is coaxially arranged inside the cooling jacket (7), and one end of the isolation tube (8) is sealed to the cooling jacket (7), while the other end is left with a gap between it and the cooling jacket (7).

3. The nozzle device for a coal-water slurry gasifier according to claim 2, characterized in that, Cooling water is poured into the cooling jacket (7).

4. The nozzle device for a coal-water slurry gasifier according to claim 3, characterized in that, A cooling water outlet (5) is provided on the cooling jacket (7); a cooling water inlet (4) is provided on the inner side of the isolation pipe (8).

5. The nozzle device for a coal-water slurry gasifier according to claim 1, characterized in that, The axis of the magnetic stirring paddle (3) coincides with the axis of the nozzle channel (2).

6. The nozzle device for a coal-water slurry gasifier according to claim 1, characterized in that, The magnetic stirring paddle (3) has threads on the part located inside the nozzle channel (2).

7. The nozzle device for a coal-water slurry gasifier according to claim 1, characterized in that, An impeller is fitted at the top (6) of the magnetic stirring paddle (3).

8. The nozzle device for a coal-water slurry gasifier according to claim 1, characterized in that, The blades of the impeller are triangular, arc-shaped, or straight.

9. The nozzle device for a coal-water slurry gasifier according to claim 7, characterized in that, The tail end of the magnetic stirring paddle (3) is connected to the drive component via a bearing.

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