Cooling device for tower top lean water pipeline of acrylonitrile organic matter absorption tower

Abstract

The utility model relates to the technical field of acrylonitrile production, in particular to a tower top lean water pipeline cooling device of an acrylonitrile organic matter absorption tower. Comprising an organic matter absorption tower, a lean water pipeline arranged at the top of the tower and a rich water pipeline arranged at the bottom of the tower, and a heat exchanger and a chilled water jacketed pipe are sequentially arranged on the lean water pipeline, so that the cooling effect is remarkably improved, the energy consumption is reduced, and the use amount of circulating water is greatly reduced; the chilled water jacketed pipe reduces the load of the heat exchanger and reduces the equipment maintenance cost; the temperature is accurately controlled, the temperature of the tower top lean water pipeline of the organic matter absorption tower is controlled within an ideal range, the working efficiency of the organic matter absorption tower is improved, and the stability of the production process and the product quality are improved. The device is simple in structure, low in cost, low in operation and construction difficulty and obvious in effect.

Description

Technical Field

[0001] The utility model relates to the technical field of acrylonitrile production, in particular to a cooling device for the lean water pipeline at the top of an acrylonitrile organic matter absorption tower. Background Technique

[0002] In the production process of acrylonitrile, the temperature control of the lean water pipeline at the top of the organic matter absorption tower is of great significance for the stable operation of the entire production process and the product quality. However, the existing cooling methods often have problems such as poor cooling effect, high energy consumption, and high equipment maintenance cost. Especially in hot summer weather, the impact on the device is greater. Due to the increased consumption of circulating water in each device, the cooling effect of the heat exchanger becomes worse, thereby reducing the absorption effect of the organic matter absorption tower and affecting the yield. Content of the Utility Model

[0003] In order to solve the above technical problems, the utility model provides a cooling device for the lean water pipeline at the top of an acrylonitrile organic matter absorption tower, which has good cooling effect, can reduce the consumption of circulating water, accurately control the temperature, and thereby improve the working efficiency and product quality of the absorption tower.

[0004] The utility model is realized through the following technical solutions:

[0005] The cooling device for the lean water pipeline at the top of the acrylonitrile organic matter absorption tower described in the utility model includes an organic matter absorption tower, a lean water pipeline arranged at the top of the tower, and a rich water pipeline arranged at the bottom of the tower. A heat exchanger and a chilled water jacket are successively arranged on the lean water pipeline, and a temperature detection device is arranged on the lean water pipeline between the chilled water jacket and the organic matter absorption tower.

[0006] Preferably, the heat exchanger is provided with a circulating water inlet line and a circulating water outlet line, and a regulating valve is arranged on the circulating water outlet line. The specifications and dimensions of the heat exchanger are designed and selected according to parameters such as the pipe diameter, flow rate, and required cooling temperature of the lean water pipeline.

[0007] Preferably, the chilled water jacket is provided with a chilled water inlet line and a chilled water outlet line, and valves are arranged on both the chilled water inlet line and the chilled water outlet line. The supply and circulation of chilled water are realized through a dedicated pipeline system to ensure stable chilled water flow rate and temperature.

[0008] Preferably, the chilled water jacket includes an inner pipe and an outer pipe, the outer pipe wraps the inner pipe, and the cross-section is concentric. The inner pipe contains lean water, and the outer pipe contains chilled water.

[0009] Preferably, the temperature detection device and the regulating valve are respectively electrically connected to a controller. During actual operation, according to the monitored temperature of the material in the lean water pipeline, the flow rate and temperature of the chilled water are adjusted in real time to achieve the best cooling effect.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] The utility model provides a chilled water jacket pipe and a heat exchanger on the lean water pipeline at the top of the acrylonitrile organic matter absorption tower, which significantly improves the cooling effect, reduces the energy consumption, and greatly reduces the amount of circulating water used; the chilled water jacket pipe reduces the load of the heat exchanger and the equipment maintenance cost; precisely controls the temperature, ensures that the temperature of the lean water pipeline at the top of the organic matter absorption tower is controlled within an ideal range, improves the working efficiency of the organic matter absorption tower, and improves the stability of the production process and the product quality. The utility model has the advantages of simple structure, low cost, low operation and construction difficulty, and obvious effect. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the cooling device for the lean water pipeline at the top of the acrylonitrile organic matter absorption tower;

[0013] Figure 2 It is a cross-sectional view of the chilled water jacket pipe;

[0014] Wherein: 1. Organic matter absorption tower; 2. Lean water pipeline; 3. Rich water pipeline; 4. Heat exchanger; 5. Chilled water jacket pipe; 6. Temperature detection device; 7. Circulating water inlet line; 8. Circulating water outlet line; 9. Control valve; 10. Controller; 11. Chilled water inlet line; 12. Chilled water outlet line. Detailed Embodiment

[0015] The following will further elaborate on the preferred solution of the utility model in conjunction with the drawings.

[0016] Embodiment 1

[0017] As Figure 1 shown, the cooling device of the utility model includes an organic matter absorption tower 1, a lean water pipeline 2 provided at the top of the tower and a rich water pipeline 3 provided at the bottom of the tower. A heat exchanger 4 and a chilled water jacket pipe 5 are successively arranged on the lean water pipeline 2. A temperature detection device 6 is arranged on the lean water pipeline 2 between the chilled water jacket pipe 5 and the organic matter absorption tower 1.

[0018] The heat exchanger 4 is provided with a circulating water inlet line 7 and a circulating water outlet line 8, and a control valve 9 is arranged on the circulating water outlet line 8.

[0019] The chilled water jacket pipe 5 is provided with a chilled water inlet line 11 and a chilled water outlet line 12, and valves are arranged on both the chilled water inlet line 11 and the chilled water outlet line 12.

[0020] The temperature detection device 6 and the control valve 9 are respectively electrically connected to the controller 10.

[0021] As Figure 2 shown, the chilled water jacket pipe 5 includes an inner pipe and an outer pipe. The outer pipe wraps the inner pipe, and the cross-section is concentric. The inner pipe contains lean water, and the outer pipe contains chilled water.

[0022] The working process of the present utility model:

[0023] Lean water enters the organic matter absorption tower 1 through the lean water pipeline 2 successively via the heat exchanger 4 and the chilled water jacket 5. When the lean water enters the heat exchanger 4, the circulating water enters the heat exchanger 4 from the circulating water inlet pipeline 7 and is discharged from the heat exchanger 4 through the circulating water outlet pipeline 8 to complete the heat exchange of the lean water. The temperature detection device 6 is used to detect the temperature and transmit the detection signal to the controller 10. The controller 10 compares the temperature detection signal with the preset temperature value, calculates the temperature deviation, generates a control signal through a control algorithm, and outputs it to the regulating valve 9 to adjust the circulating water volume, thereby realizing the automatic control of the temperature. When the temperature exceeds the preset safety range, the valves of the chilled water inlet pipeline 11 and the chilled water outlet pipeline 12 of the chilled water jacket 5 are opened to reduce the load of the heat exchanger 4 and at the same time reduce the usage amount of the circulating water, ensuring that the temperature of the lean water pipeline 2 at the top of the organic matter absorption tower 1 is controlled within the ideal range. In practical applications, the parameters of the system can be adjusted and optimized according to specific production processes and requirements to achieve the best control effect. In the chilled water jacket 5, the inner pipe contains lean water and the outer pipe is chilled water, and the lean water and the chilled water flow in opposite directions to increase the heat exchange effect.

Claims

1. A cooling device for the lean water pipeline at the top of an acrylonitrile organic matter absorption tower, characterized in that: It includes an organic matter absorption tower (1), a lean water pipeline (2) provided at the top of the tower, and a rich water pipeline (3) provided at the bottom of the tower. A heat exchanger (4) and a chilled water jacket (5) are successively provided on the lean water pipeline (2), and a temperature detection device (6) is provided on the lean water pipeline (2) between the chilled water jacket (5) and the organic matter absorption tower (1).

2. The cooling device for the lean water pipeline at the top of the acrylonitrile organic matter absorption tower according to claim 1, characterized in that: The heat exchanger (4) is provided with a circulating water inlet line (7) and a circulating water outlet line (8).

3. The cooling device for the lean water pipeline at the top of the acrylonitrile organic matter absorption tower according to claim 2, wherein: A regulating valve (9) is provided on the circulating water outlet line (8).

4. The cooling device for the lean water pipeline at the top of the acrylonitrile organic matter absorption tower according to claim 3, wherein: The temperature detection device (6) and the regulating valve (9) are respectively electrically connected to a controller (10).

5. The cooling device for the lean water pipeline at the top of the acrylonitrile organic matter absorption tower according to claim 1, wherein: The chilled water jacket (5) is provided with a chilled water inlet line (11) and a chilled water outlet line (12).

6. The cooling device for the lean water pipeline at the top of the acrylonitrile organic matter absorption tower according to claim 5, wherein: Valves are provided on both the chilled water inlet line (11) and the chilled water outlet line (12).

7. The cooling device for the lean water pipeline at the top of the acrylonitrile organic matter absorption tower according to claim 1, characterized in that: The chilled water jacket (5) includes an inner tube and an outer tube, and the outer tube wraps the inner tube, and the cross-section is concentric circles.

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