Protective adjusting device for vacuum pipeline of chlorophenol rectifying tower

Abstract

A protection adjusting device for a vacuum pipeline of a chlorophenol rectifying tower comprises an enamel pipe, a carbon steel pipeline and a steam heating pipe, one end of the enamel pipe is connected to an outlet in the middle of the top of the rectifying tower, the carbon steel pipeline is in butt joint with the outer end of the enamel pipe through a flange, and a vacuum pump is arranged on the carbon steel pipeline. The steam heating pipe is arranged on the outer side wall of the enamel pipe and covers the whole enamel pipe in the length direction, and an electromagnetic control valve is arranged on an inlet pipe section of the steam heating pipe. According to the device, the corrosion-resistant enamel pipe is adopted as a tail gas discharge pipeline at the top of the rectifying tower, so that the phenomenon that the pipeline at the top of the tower is easy to corrode is well solved, the spiral steam heating pipe is adopted to heat the enamel pipe so as to heat tail gas discharged by the enamel pipe, and the phenomenon that the tail gas in the upper pipe is easy to block is solved; frequent maintenance and dredging are not needed, and continuous and efficient production operation of factories is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of chemical production equipment, in particular to a vacuum pipeline protection and regulating device for a chlorophenol rectification tower. Background Art

[0002] Chlorophenol distillation is a common separation and purification method.

[0003] The distillation of chlorophenol requires a distillation tower, which is usually a vertical cylindrical tower device. In the chlorophenol distillation tower, the mixture is heated, and the chlorophenol and other components boil and rise to the top of the tower, and then cool and condense into liquid in the condenser. By carefully designing the packing and operating conditions in the tower, effective separation and purification of chlorophenol can be achieved.

[0004] At present, 20# carbon steel pipes are generally used for vacuum pipes at the upper outlet of the chlorophenol distillation tower. During the distillation process, the tail gas in the pipe is often blocked by crystallization and corroded, which requires frequent maintenance and dredging. In addition, the location of pipe blockage and corrosion is usually close to the top of the distillation tower. Maintenance, dredging and pipe replacement operations are troublesome and have great safety risks, which affect the continuous and efficient production operations of the factory and need to be improved. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a vacuum pipeline protection and regulating device for a chlorophenol distillation tower.

[0006] The technical scheme of the utility model is: a chlorophenol distillation tower vacuum pipeline protection and adjustment device, comprising an enameled tube, a carbon steel pipeline and a steam heating tube, one end of the enameled tube is connected to the outlet in the middle of the top of the distillation tower, the carbon steel pipeline is butt-jointed with the outer end of the enameled tube through a flange, the length of the carbon steel pipeline is greater than the length of the enameled tube, a vacuum pump is arranged on the carbon steel pipeline, the steam heating tube is arranged on the outer side wall of the enameled tube and fits with the outer side wall of the enameled tube, the steam heating tube is a stainless steel tube, the steam heating tube covers the entire length of the enameled tube, and an electromagnetic control valve is arranged at the inlet pipe section of the steam heating tube.

[0007] Preferably, the heating pipe section of the steam heating pipe is a spiral pipe, which is tightly wound around the outer side of the enamel pipe, and one end of the steam heating pipe is connected to a steam heat source.

[0008] Preferably, the outer side of the steam heating pipe is wrapped with a thermal insulation layer.

[0009] Preferably, the thermal insulation layer is rock wool or glass wool board.

[0010] Preferably, the thermal insulation layer is wrapped with an aluminum foil layer or a stainless steel sheet layer.

[0011] Preferably, a temperature measuring instrument is provided in the middle of the enamel tube, and the temperature measuring instrument is interlocked and controlled with the electromagnetic control valve of the steam heating tube.

[0012] Preferably, the outlet pipe section of the steam heating pipe is provided with a manual valve and a flow meter.

[0013] The beneficial technical effects of the utility model are:

[0014] (1) The device uses corrosion-resistant enameled pipes as exhaust pipes at the top of the distillation tower, which effectively solves the problem of easy corrosion of the pipes at the top of the tower. It also uses spiral steam heating pipes to heat the enameled pipes, and then heats the exhaust gas discharged from the enameled pipes, solving the problem of crystallization blockage of the exhaust gas in the upper pipe. Frequent maintenance and dredging are unnecessary, ensuring continuous and efficient production operations of the factory.

[0015] (2) The temperature measuring instrument in the device is interlocked with the electromagnetic control valve of the steam heating pipe. The heating temperature of the steam heating pipe is adjusted according to the real-time monitoring of the pipe temperature by the temperature measuring instrument to ensure the stability of the heating temperature and improve the anti-clogging effect of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 yes Figure 1 AA section structural diagram;

[0018] Figure 3 This is a schematic diagram of the structure of the utility model after the insulation layer and the tin foil layer are removed;

[0019] Figure 4 It is a usage state diagram of the utility model.

[0020] In the figure, 11. distillation tower, 12. enamel tube, 13. carbon steel pipeline, 14. steam heating tube, 15. flange, 16. vacuum pump, 17. electromagnetic control valve, 18. valve, 19. flow meter, 20. insulation layer, 21. aluminum foil layer, 22. thermometer. DETAILED DESCRIPTION

[0021] Example 1, see the attached specification Figure 3A vacuum pipeline protection and regulating device for a chlorophenol distillation tower 11 comprises an enamel tube 12, a carbon steel pipeline 13 and a steam heating tube 14, one end of the enamel tube 12 is connected to the outlet in the middle of the top of the distillation tower 11, the enamel tube 12 has excellent corrosion resistance, the carbon steel pipeline 13 is butt-jointed with the outer end of the enamel tube 12 through a flange 15, a vacuum pump 16 is arranged on the carbon steel pipeline 13, only a section of the enamel tube 12 is arranged on the upper part of the distillation tower 11 where blockage is serious, and the remaining pipe sections that are not easy to block are made of carbon steel pipes, which is conducive to cost saving while solving the crystallization blockage problem, and ensures the safety and stability of pipeline transportation of tail gas; the steam heating tube 14 is arranged on the outer side wall of the enamel tube 12, the steam heating tube 14 covers the entire length of the enamel tube 12, and an electromagnetic control valve 17 is arranged at the inlet pipe section of the steam heating tube 14, through which the steam heating tube 14 can be opened and closed, and the flow of the steam heating tube 14 can be adjusted to achieve temperature regulation.

[0022] The heating pipe section of the steam heating pipe 14 is a spiral pipe, which is tightly wound around the outer side of the enamel pipe 12. The spiral heating pipe covers a larger area of ​​the enamel pipe 12, and has a good heating effect. A valve 18 and a flow meter 19 are provided at the outlet of the steam heating pipe 14.

[0023] A temperature measuring instrument 22 is provided in the middle of the enamel tube 12 , and the temperature measuring instrument 22 and the electromagnetic control valve 17 of the steam heating tube 14 are interlocked and controlled with each other.

[0024] The working process of this embodiment is as follows: the tail gas is discharged from the outlet at the top of the distillation tower 11 into the enameled tube 12, and enters the carbon steel pipe 13 from the enameled tube 12 for discharge. During this process, hot steam is introduced into the steam heating tube 14, and the heat generated by the steam heating tube 14 is transferred to the enameled tube 12. The blockage of the enameled tube 12 is avoided by high-temperature heating. The temperature of the steam heating tube 14 fluctuates during the heating process. At this time, the thermometer 22 transmits the temperature value of the real-time monitoring pipeline to the electromagnetic control valve 17, and the heating temperature of the steam heating tube 14 is adjusted by the electromagnetic control valve 17 to realize the interlocking control of the heating temperature and pipeline stability, ensure that the pipeline temperature is in a stable state, and improve the anti-blocking effect of the pipeline.

[0025] Example 2, see the attached specification Figure 1-2 In this embodiment, based on the first embodiment, an insulation layer 20 is wrapped on the outer side of the steam heating pipe 14. The insulation layer 20 is rock wool, and an aluminum foil layer 21 is wrapped outside the insulation layer 20. The insulation layer 20 is protected by the tin foil layer. The insulation layer 20 and the tin foil layer can effectively avoid the loss of heating heat, reduce the consumption of hot steam, and improve the heat utilization efficiency.

Claims

1. A chlorophenol rectification tower vacuum pipeline protection and regulating device, characterized in that: It includes an enameled tube, a carbon steel pipeline and a steam heating tube. One end of the enameled tube is connected to the outlet in the middle of the top of the distillation tower. The carbon steel pipeline is butt-jointed with the outer end of the enameled tube through a flange. A vacuum pump is provided on the carbon steel pipeline. The steam heating tube is arranged on the outer side wall of the enameled tube. The steam heating tube covers the entire length of the enameled tube. An electromagnetic control valve is provided at the inlet pipe section of the steam heating tube.

2. A chlorophenol rectification tower vacuum pipeline protection and regulating device according to claim 1, characterized in that: The heating pipe section of the steam heating pipe is a spiral pipe, which is tightly wound around the outer side of the enamel pipe.

3. A chlorophenol rectification tower vacuum pipeline protection and regulating device according to claim 2, characterized in that: The outer side of the steam heating pipe is wrapped with a heat-insulating layer.

4. A chlorophenol rectification tower vacuum pipeline protection and regulating device according to claim 3, characterized in that: The thermal insulation layer is rock wool.

5. A chlorophenol rectification tower vacuum pipeline protection and regulating device according to claim 3, characterized in that: The heat-insulating layer is wrapped with an aluminum foil layer.

6. A chlorophenol rectification tower vacuum pipeline protection and regulating device according to claim 1, characterized in that: A temperature measuring instrument is arranged in the middle of the enamel tube, and the temperature measuring instrument is interlocked with the electromagnetic control valve of the steam heating tube for control.

7. A chlorophenol rectification tower vacuum pipeline protection and regulating device according to claim 1, characterized in that: A valve is provided at the outlet pipe section of the steam heating pipe.

8. The vacuum pipeline protection and regulating device for a chlorophenol rectification tower according to claim 1, characterized in that: A flow meter is provided at the outlet pipe section of the steam heating pipe.

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