Condensate water temperature control recovery device

Abstract

The utility model relates to a condensate water temperature control recovery device which comprises a condensate water heat exchanger and is technically characterized in that a tube pass inlet of the condensate water heat exchanger is connected with a high-temperature condensate water feeding pipeline, a tube pass outlet of the condensate water heat exchanger is connected with a low-temperature condensate water return pipeline, and the tail end of the low-temperature condensate water return pipeline is communicated with a steam condensate storage tank. The low-temperature condensed water return pipeline is provided with a condensed water return adjusting valve, the high-temperature condensed water feeding pipeline is provided with a clean-up pipeline, the clean-up pipeline is provided with a pneumatic valve, and a condensed water bypass pipeline is arranged between the high-temperature condensed water feeding pipeline and the low-temperature condensed water return pipeline. One end of the condensed water bypass pipeline is located on a pipe section between the inlet side of the pneumatic valve and the pipe pass inlet of the condensed water heat exchanger, the other end of the condensed water bypass pipeline is located on a pipe section on the outlet side of the condensed water return regulating valve, and a bypass regulating valve is arranged on the condensed water bypass pipeline. The device recycles high-temperature condensed water for production, solves the problem of resource waste, meanwhile, is flexible and reliable in temperature control, and ensures the recycling effect.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary equipment for distillation columns, and particularly relates to a condensate temperature control and recovery device. Background Art

[0002] At present, the condensate of the distillation column has a water temperature that is too high and exceeds the usage requirements. If it is discharged, it will cause waste. Therefore, a condensate heat exchanger is usually used to recover heat energy and water resources. However, there are still the following problems: the temperature control is not flexible, which is not conducive to recovery and use in production. Summary of the Invention

[0003] The purpose of the utility model is to provide a condensate temperature control and recovery device for a distillation column with reasonable structure and reliable use, which recovers high-temperature condensate for production, solves the problem of resource waste, and at the same time, has flexible and reliable temperature control to ensure the recovery and utilization effect.

[0004] The technical solution of the utility model is as follows:

[0005] A condensate temperature control and recovery device includes a condensate heat exchanger. The shell-side inlet of the condensate heat exchanger is connected to a circulating water supply pipeline, and the shell-side outlet of the condensate heat exchanger is connected to a circulating water return pipeline. The technical key points are: the tube-side inlet of the condensate heat exchanger is connected to a high-temperature condensate supply pipeline, the tube-side outlet of the condensate heat exchanger is connected to a low-temperature condensate return pipeline, the end of the low-temperature condensate return pipeline communicates with a steam condensate storage tank, the steam condensate storage tank communicates with the shell side of a propylene evaporator, a condensate return regulating valve is provided on the low-temperature condensate return pipeline, a drain pipeline is provided on the high-temperature condensate supply pipeline, a pneumatic valve is provided on the drain pipeline, a condensate bypass pipeline is provided between the high-temperature condensate supply pipeline and the low-temperature condensate return pipeline. One end of the condensate bypass pipeline is located on the pipeline section between the inlet side of the pneumatic valve and the tube-side inlet of the condensate heat exchanger, and the other end of the condensate bypass pipeline is located on the pipeline section on the outlet side of the condensate return regulating valve. A bypass regulating valve is provided on the condensate bypass pipeline.

[0006] For the above-mentioned condensate temperature control and recovery device, a first temperature sensor is provided at the tube-side inlet of the condensate heat exchanger, a second temperature sensor is provided at the tube-side outlet, and a third temperature sensor is provided at the end of the low-temperature condensate return pipeline.

[0007] For the above-mentioned condensate temperature control and recovery device, the high-temperature condensate supply pipeline is further provided with a serpentine tube branch. The inlet end and the outlet end of the serpentine tube branch are respectively connected to the high-temperature condensate supply pipeline. A direct-through control valve is provided on the high-temperature condensate supply pipeline between the inlet end and the outlet end of the serpentine tube branch. Cut-off valves are respectively provided at the inlet end and the outlet end of the serpentine tube branch. The serpentine section of the serpentine tube branch is covered by a heat collection cover, and the heat collection cover is communicated with a hot air pipeline to supply a demand end.

[0008] For the condensate temperature control and recovery device described above, a drain valve is provided on the circulating water supply pipeline, and an exhaust valve is provided on the circulating water return pipeline.

[0009] The beneficial effects of the present utility model are as follows:

[0010] 1. The circulating water of the condensate heat exchanger exchanges heat with the distillation column condensate, thereby cooling the condensate. When the outlet water temperature of the low-temperature condensate return pipeline is too low, water can be sent through the condensate bypass pipeline to the low-temperature condensate return pipeline and mixed with the heat-exchanged water flow. The outlet water temperature of the low-temperature condensate return pipeline can be flexibly adjusted through the bypass regulating valve and the condensate return regulating valve, which is beneficial for the use of the propylene evaporator in the production equipment. On the one hand, waste is reduced, and on the other hand, the recovery effect is good.

[0011] 2. When the outlet water temperature of the low-temperature condensate return pipeline is still relatively high, first use the serpentine pipe branch to exchange heat with the flowing air in the heat collection cover, and the heated air can be transmitted to the remote demand end for heating, further achieving the purpose of saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the present utility model;

[0013] Figure 2 is Figure 1 the internal structural diagram of the heat collection cover in

[0014] In the figure: 1. Low-temperature condensate return pipeline, 2. Condensate bypass pipeline, 3. Condensate return regulating valve, 4. Condensate heat exchanger, 5. Exhaust valve, 6. Circulating water return pipeline, 7. Circulating water supply pipeline, 8. Drain valve, 9. Cut-off valve, 10. Straight-through control valve, 11. Bypass regulating valve, 12. Heat collection cover, 13. Cut-off valve, 14. Drain pipeline, 15. Pneumatic valve, 16. High-temperature condensate supply pipeline, 17. Serpentine pipe branch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The present utility model will be described in detail according to the accompanying drawings of the specification.

[0016] As Figure 1 , Figure 2 shown, the condensate temperature control and recovery device includes a condensate heat exchanger 4. The shell-side inlet of the condensate heat exchanger 4 is connected to the circulating water supply pipeline 7, and the shell-side outlet of the condensate heat exchanger 4 is connected to the circulating water return pipeline 6. A drain valve 8 is provided on the circulating water supply pipeline 7, and an exhaust valve 5 is provided on the circulating water return pipeline 6.

[0017] Among them, the tube side inlet of the condensate heat exchanger 4 is connected to the high-temperature condensate upper water pipeline 16, the tube side outlet of the condensate heat exchanger 4 is connected to the low-temperature condensate return water pipeline 1, the end of the low-temperature condensate return water pipeline 1 communicates with the steam condensate storage tank, and the steam condensate storage tank communicates with the shell side of the propylene evaporator.

[0018] A condensate return water regulating valve 3 is provided on the low-temperature condensate return water pipeline 1. A drain pipeline 14 is provided on the high-temperature condensate upper water pipeline 16, and a pneumatic valve 15 is provided on the drain pipeline 14. A condensate bypass pipeline 2 is provided between the high-temperature condensate upper water pipeline 16 and the low-temperature condensate return water pipeline 1. One end of the condensate bypass pipeline 2 is located on the pipeline section between the inlet side of the pneumatic valve 15 and the tube side inlet of the condensate heat exchanger 4, and the other end of the condensate bypass pipeline 2 is located on the pipeline section at the outlet side of the condensate return water regulating valve 3. A bypass regulating valve 11 is provided on the condensate bypass pipeline 2.

[0019] In this embodiment, a first temperature sensor is provided at the tube side inlet of the condensate heat exchanger 4, a second temperature sensor is provided at the tube side outlet, and a third temperature sensor is provided at the end of the low-temperature condensate return water pipeline 1.

[0020] In order to further achieve the purpose of flexible temperature regulation and energy conservation, the high-temperature condensate upper water pipeline 16 is further provided with a serpentine pipe branch 17. The inlet end and the outlet end of the serpentine pipe branch 17 are respectively connected to the high-temperature condensate upper water pipeline 16. A direct-through control valve 10 is provided on the high-temperature condensate upper water pipeline 16 between the inlet end and the outlet end of the serpentine pipe branch 17. Cut-off valves 13 and 9 are respectively provided at the inlet end and the outlet end of the serpentine pipe branch 17. The serpentine section of the serpentine pipe branch 17 is covered by a heat collecting cover 12, and the heat collecting cover 12 is communicated with the hot air pipeline to supply the demand side.

[0021] Working principle:

[0022] During use, the high-temperature condensate of the distillation column is introduced into the tube side of the condensate heat exchanger 4 through the high-temperature condensate upper water pipeline 16, and the high-temperature condensate is cooled by circulating water. When the third temperature sensor detects that the temperature is lower than the operating temperature of the propylene evaporator, the bypass regulating valve 11 is opened to adjust a part of the high-temperature condensate to converge with the outlet water of the condensate heat exchanger 4 through the condensate bypass pipeline 2 and is conveyed to the end of the low-temperature condensate return water pipeline 1 to achieve the purpose of adjusting the water temperature. When the third temperature sensor still detects that the temperature is higher than the operating temperature of the propylene evaporator, the direct-through control valve 10 is closed, and the cut-off valves 13 and 9 at the inlet end and the outlet end of the serpentine pipe branch 17 are opened. The high-temperature condensate of the distillation column is cooled by air through the serpentine pipe branch 17 and then cooled by water through the condensate heat exchanger 4 and discharged to the low-temperature condensate return water pipeline 1 to achieve the purpose of adjusting the water temperature, reducing manual operation and having a high degree of automation. The utility model can reduce the temperature of the high-temperature condensate by 10 °C and save 6 tons of deionized water per hour.

[0023] The embodiments of the present utility model have been described in detail above. However, the above content is only the preferred embodiments of the present utility model and should not be considered as limiting the scope of implementation of the present utility model. Any equivalent changes and improvements made within the scope of the creation of the present utility model should still fall within the scope covered by this patent.

Claims

1. A condensate temperature control and recovery device, comprising a condensate heat exchanger, wherein the shell side inlet of the condensate heat exchanger is connected to a circulating water supply pipeline, and the shell side outlet of the condensate heat exchanger is connected to a circulating water return pipeline, characterized in that: The tube inlet of the condensate heat exchanger is connected to the high-temperature condensate supply pipeline, the tube outlet of the condensate heat exchanger is connected to the low-temperature condensate return pipeline, the end of the low-temperature condensate return pipeline is communicated with the steam condensate storage tank, the steam condensate storage tank is communicated with the shell side of the propylene evaporator, the low-temperature condensate return pipeline is provided with a condensate return regulating valve, the high-temperature condensate supply pipeline is provided with a drain pipeline, the drain pipeline is provided with a pneumatic valve, a condensate bypass pipeline is provided between the high-temperature condensate supply pipeline and the low-temperature condensate return pipeline, one end of the condensate bypass pipeline is located on the pipe section between the inlet side of the pneumatic valve and the tube inlet of the condensate heat exchanger, the other end of the condensate bypass pipeline is located on the outlet side pipe section of the condensate return regulating valve, and the condensate bypass pipeline is provided with a bypass regulating valve.

2. The condensate temperature control and recovery device according to claim 1 is characterized in that: A first temperature sensor is provided at the tube inlet of the condensate heat exchanger, a second temperature sensor is provided at the tube outlet, and a third temperature sensor is provided at the end of the low-temperature condensate return pipeline.

3. The condensate temperature control and recovery device according to claim 1, characterized in that: The high-temperature condensate water supply pipeline is further provided with a serpentine pipe branch, the inlet end and the outlet end of the serpentine pipe branch are respectively connected to the high-temperature condensate water supply pipeline, the high-temperature condensate water supply pipeline is provided with a straight-through control valve between the inlet end and the outlet end of the serpentine pipe branch, the inlet end and the outlet end of the serpentine pipe branch are respectively provided with a cut-off valve, the serpentine section of the serpentine pipe branch is covered in a heat collecting cover, and the heat collecting cover is connected to the hot air pipeline to supply the demand end.

4. The condensate temperature control and recovery device according to claim 1 is characterized in that: The circulating water supply pipeline is provided with a drain valve, and the circulating water return pipeline is provided with an exhaust valve.

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