Water injection system of electric heater

Abstract

The utility model provides a water injection system of an electric heater. The water injection system comprises an oxychlorination electric heater, an SV static mixer, a gas inlet pipeline, an electric heater pipeline and a water injection pipe, circulating gas is introduced into an inlet of the gas inlet pipeline, an outlet of the gas inlet pipeline is connected with a first inlet of the SV static mixer, an outlet of the SV static mixer is connected with an inlet of the electric heater pipeline, and an outlet of the electric heater pipeline is connected with an inlet of the oxychlorination electric heater; reclaimed water is introduced into an inlet of the water injection pipe, and an outlet of the water injection pipe communicates with a second inlet of the SV static mixer. The distance between the inlet of the chlorination electric heater and the outlet of the water injection pipe is greater than or equal to 1.5 m; one side, close to the No.1 inlet of the SV static mixer, of the outlet of the water injection pipe is longer than the other side of the outlet of the water injection pipe; the purpose of retarding cracks of the electric heater can be achieved.

Description

Technical Field

[0001] This invention belongs to the technical field of mitigating cracks in electric heaters, and specifically relates to a water injection system for electric heaters. Background Technology

[0002] In the reforming and regeneration system, the injection of liquid water into the regenerated oxychlorination system causes the electric heater to repeatedly expand when heated and contract when cooled. This results in frequent cracking of the electric heater shell (every 2-3 years), which can easily lead to leakage of regenerated gas and pose a safety hazard. Utility Model Content

[0003] In view of the above problems, the purpose of this application is to provide a structure for mitigating cracks in an electric heater in a reforming regeneration system, so as to achieve the purpose of mitigating cracks in the electric heater.

[0004] To achieve some or all of the above objectives or other objectives, this application provides the following technical solution: an electric heater water injection system, comprising an oxychlorination electric heater, an SV static mixer, an air inlet pipeline, an electric heater pipeline, and a water injection pipe; the inlet of the air inlet pipeline is supplied with circulating gas, the outlet of the air inlet pipeline is connected to the first inlet of the SV static mixer, the outlet of the SV static mixer is connected to the inlet of the electric heater pipeline, and the outlet of the electric heater pipeline is connected to the inlet of the oxychlorination electric heater; the inlet of the water injection pipe is supplied with reclaimed water, and the outlet of the water injection pipe is connected to the second inlet of the SV static mixer.

[0005] Furthermore, the distance between the inlet of the chlorination electric heater and the outlet of the water injection pipe is greater than or equal to 1.5m; the straight pipe at the outlet of the water injection pipe is obliquely cut at a certain angle, and the side of the water injection pipe outlet closest to the No. 1 inlet of the SV static mixer is longer than the other side.

[0006] Furthermore, the water injection pipe is bent at a right angle.

[0007] Furthermore, a drain pipe is connected to the electric heater pipeline.

[0008] Furthermore, a recirculating air control valve assembly is connected to the intake pipeline.

[0009] Furthermore, the distance between the inlet of the chlorination electric heater and the circulating gas control valve group is greater than or equal to 2m.

[0010] Furthermore, a water injection valve is connected to the water injection pipe.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: In the reforming and regeneration system, the water injection line at the regeneration oxychlorination inlet is moved forward, extending the water injection point and allowing sufficient pipeline length to allow for water vaporization; the addition of an SV static mixer increases the water-vapor contact area, thus mitigating pipeline corrosion in two ways; the straight pipe below the water injection port is cut at a 45° angle, and the injected water enters the static mixer along with the direction of the circulating gas, ensuring full contact between water and gas; thus achieving the purpose of mitigating cracking of the electric heater. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the present invention applied to a reforming and regeneration system;

[0014] In the diagram: 1. Oxychlorination electric heater, 2. SV static mixer, 3. Inlet pipeline, 4. Electric heater pipeline, 5. Water injection pipe, 6. Drain, 7. Circulating gas control valve group, 8. Water injection valve. Detailed Implementation

[0015] To make the structure and function of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0016] See appendix Figure 1-2 An electric heater water injection system includes an oxychlorination electric heater 1, an SV static mixer 2, an air inlet line 3, an electric heater line 4, and a water injection pipe 5. The inlet of the air inlet line 3 is supplied with circulating air, and the outlet of the air inlet line 3 is connected to the first inlet of the SV static mixer 2. The outlet of the SV static mixer 2 is connected to the inlet of the electric heater line 4, and the outlet of the electric heater line 4 is connected to the inlet of the oxychlorination electric heater 1. The inlet of the water injection pipe 5 is supplied with reclaimed water, and the outlet of the water injection pipe 5 is connected to the second inlet of the SV static mixer 2.

[0017] The distance between the inlet of the chlorination electric heater 1 and the outlet of the water injection pipe 5 is greater than or equal to 1.5m; the straight pipe at the outlet of the water injection pipe 5 is obliquely cut at 45°, and the side of the outlet of the water injection pipe 5 closest to the first inlet of the SV static mixer 2 is longer than the other side.

[0018] Based on the above technical solution, after the water injection line is moved to the displacement control valve, the distance between the water injection point and the inlet of the oxychlorination electric heater is greater than or equal to 1.5m, so as to achieve the purpose of safe shutdown.

[0019] The water injection pipe 5 is bent at a right angle.

[0020] The electric heater pipeline 4 is connected to the drain 6.

[0021] The intake pipeline 3 is connected to the circulating air control valve group 7.

[0022] The distance between the inlet of the chlorination electric heater 1 and the circulating gas control valve group 7 is greater than or equal to 2m.

[0023] The water injection pipe 5 is connected to the water injection valve 8.

[0024] Based on the above technical solution, this application moves the inlet water injection line of the regenerated oxychlorination by 1.5m and adds an SV static mixer. The straight pipe below the water injection port is cut at a 45° angle. This allows for sufficient pipeline length to allow the injected water to vaporize, thereby mitigating the cracking of the electric heater.

[0025] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. An electric heater water injection system, characterized in that: It includes an oxychlorination electric heater (1), an SV static mixer (2), an air inlet line (3), an electric heater line (4), and a water injection pipe (5); the inlet of the air inlet line (3) is supplied with circulating gas, the outlet of the air inlet line (3) is connected to the first inlet of the SV static mixer (2), the outlet of the SV static mixer (2) is connected to the inlet of the electric heater line (4), and the outlet of the electric heater line (4) is connected to the inlet of the oxychlorination electric heater (1); the inlet of the water injection pipe (5) is supplied with regenerated water, and the outlet of the water injection pipe (5) is connected to the second inlet of the SV static mixer (2).

2. The electric heater water injection system according to claim 1, characterized in that: The distance between the inlet of the oxychlorination electric heater (1) and the outlet of the water injection pipe (5) is greater than or equal to 1.5m; the straight pipe at the outlet of the water injection pipe (5) is obliquely cut at 45°, and the side of the outlet of the water injection pipe (5) closer to the No. 1 inlet of the SV static mixer (2) is longer than the other side.

3. The electric heater water injection system according to claim 1, characterized in that: The water injection pipe (5) is bent at a right angle.

4. The electric heater water injection system according to claim 1, characterized in that: The electric heater pipeline (4) is connected to the drain (6).

5. The electric heater water injection system according to claim 1, characterized in that: The intake pipeline (3) is connected to the circulating air control valve group (7).

6. The electric heater water injection system according to claim 5, characterized in that: The distance between the inlet of the oxychlorination electric heater (1) and the circulating gas control valve group (7) is greater than or equal to 2m.

7. The electric heater water injection system according to claim 1, characterized in that: A water injection valve (8) is connected to the water injection pipe (5).

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