Steam trap waste heat recovery device

Abstract

The utility model discloses a steam trap waste heat recovery device which is composed of a steam inlet pipe, a heating heat exchanger, a preheating heat exchanger, a steam trap, a steam-water separator, an electric control valve, a liquid level sensor, a condensate tank, a condensate pump, a control module and a blow-down pipe. Heated steam condensate enters the next procedure through the steam trap, in the working process of the steam trap, part of uncondensed steam and part of heat energy contained in high-temperature condensate are not utilized, the waste heat recovery device is additionally arranged behind the steam trap, and therefore the problem of waste heat recovery and utilization of part of uncondensed steam and high-temperature condensate is solved. Compared with the prior art that the heat energy after the steam trap is not recycled in the steam using process, the steam energy is saved, and the steam using quality is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of waste heat steam recovery and utilization, and directly relates to a device for recovering waste heat from a steam trap. Background Technology

[0002] Currently, when steam heats the air passing through a heat exchanger, the heated steam condensate enters the next process through a steam trap. Some of the uncondensed steam and high-temperature condensate contain some heat energy, which is not fully utilized, resulting in a waste of some of the heat energy of the uncondensed steam and high-temperature condensate. Therefore, it is essential to study a waste heat recovery device for steam traps. Summary of the Invention

[0003] The purpose of this invention is to address the problem that after steam heats the air passing through a heat exchanger, some uncondensed steam and high-temperature condensate containing some heat energy are not recovered and utilized. The invention researches a waste heat recovery device for the steam trap, and its technical solution is as follows:

[0004] This utility model discloses a waste heat recovery device for a steam trap, comprising a steam inlet pipe 1, a heating heat exchanger 2, a preheating heat exchanger 3, a steam trap 4, a steam-water separator 5, an electric regulating valve 6, a liquid level sensor 7, a condensate tank 8, a condensate pump 9, a control module 10, and a vent pipe 11. The steam inlet pipe 1 is connected to the top inlet of the heating heat exchanger 2. The bottom of the heating heat exchanger 2 is connected to the inlet of the steam trap 4 via a pipe and valve. The outlet of the steam trap 4 is connected to the inlet of the steam-water separator 5 via a pipe and valve. The gas outlet of the steam-water separator 5 is connected to the inlet of the preheating heat exchanger 3 via a pipe. The outlet of the preheating heat exchanger 3 is connected to the inlet of the condensate tank 8 via a pipe. The outlet of the condensate tank 8 is connected to the condensate pump 9 via a pipe. The condensate outlet of the steam-water separator 5 is connected to the inlet of the condensate tank 8 via a pipe and the electric regulating valve 6. The top of the condensate tank 8 is connected to the vent pipe 11. The liquid level sensor 7 is installed at the bottom of the steam-water separator 5.

[0005] Furthermore, the top horizontal position of the condensate tank 8 is lower than the lowest horizontal position of the preheating heat exchanger 3.

[0006] The purpose of this invention is achieved as follows: Steam enters the heating heat exchanger through the steam inlet pipe. The steam gradually condenses into condensate in the heating heat exchanger. The condensate enters the steam trap through the outlet of the heating heat exchanger via a pipe. Due to the change in pressure difference before and after the steam trap, the steam trap is activated. The condensate enters the steam-water separator after passing through the steam trap. Due to the decrease in condensate pressure after the steam trap and the steam brought by some of the condensate during the operation of the steam trap, the condensate is completely separated in the steam-water separator. The separated steam enters the preheating heat exchanger through a pipe, where it condenses into condensate and enters the condensate tank through a pipe. The condensate separated by the steam-water separator is discharged into the condensate tank through the electric regulating valve at the bottom of the steam-water separator. The condensate mixed in the condensate tank is pressurized by the condensate pump and sent to the next process.

[0007] Furthermore, the electric regulating valve and the liquid level sensor are electrically connected through the control module to control the liquid level of the steam-water separator, thereby controlling the optimal separation effect of the steam-water separator.

[0008] The beneficial effects of this utility model are: by separating the steam and water in the condensate after the steam trap and recovering the waste heat, the problem of recovering some of the waste heat from uncondensed steam and high-temperature condensate is solved, the full utilization of steam heat energy is achieved, and the steam utilization efficiency is improved. Attached Figure Description

[0009] Appendix Figure 1 A schematic diagram of the structure of a waste heat recovery device for a hydrophobic condensate tank according to this utility model is shown.

[0010] Explanation of reference numerals in the attached diagram: 1. Steam inlet pipe; 2. Heating heat exchanger; 3. Preheating heat exchanger; 4. Steam trap; 5. Steam-water separator; 6. Electric regulating valve; 7. Liquid level sensor; 8. Condensate tank; 9. Condensate pump; 10. Control module; 11. Vent pipe. Detailed Implementation

[0011] Now combined with the appendix Figure 1 The present invention provides a further description of a waste heat recovery device for a condensate drain.

[0012] This utility model discloses a waste heat recovery device for a steam trap, comprising a steam inlet pipe 1, a heating heat exchanger 2, a preheating heat exchanger 3, a steam trap 4, a steam-water separator 5, an electric regulating valve 6, a liquid level sensor 7, a condensate tank 8, a condensate pump 9, a control module 10, and a vent pipe 11. The steam inlet pipe 1 is connected to the top inlet of the heating heat exchanger 2. The bottom of the heating heat exchanger 2 is connected to the inlet of the steam trap 4 via a pipe and valve. The outlet of the steam trap 4 is connected to the inlet of the steam-water separator 5 via a pipe and valve. The gas outlet of the steam-water separator 5 is connected to the inlet of the preheating heat exchanger 3 via a pipe. The outlet of the preheating heat exchanger 3 is connected to the inlet of the condensate tank 8 via a pipe. The outlet of the condensate tank 8 is connected to the condensate pump 9 via a pipe. The condensate outlet of the steam-water separator 5 is connected to the inlet of the condensate tank 8 via a pipe and the electric regulating valve 6. The top of the condensate tank 8 is connected to the vent pipe 11. The liquid level sensor 7 is installed at the bottom of the steam-water separator 5.

[0013] The working principle of this utility model is as follows: Steam enters the heating heat exchanger 2 through the steam inlet pipe 1. The steam gradually condenses into condensate in the heating heat exchanger 2. The condensate enters the steam trap 4 through the outlet of the heating heat exchanger 2 via a pipe. Due to the change in pressure difference before and after the steam trap 4, the steam trap is activated. The condensate enters the steam-water separator 5 after passing through the steam trap 4. Due to the decrease in condensate pressure after the steam trap 4, and the steam brought by some of the condensate during the operation of the steam trap 4, it is completely separated in the steam-water separator 5. The separated steam enters the preheating heat exchanger 3 through a pipe. In the preheating heat exchanger 3, it condenses into condensate and enters the condensate tank 8 through a pipe. The condensate separated by the steam-water separator 5 is discharged into the condensate tank 8 through the electric regulating valve 6 at the bottom of the steam-water separator 5. The condensate mixed in the condensate tank 8 is pressurized by the condensate pump 9 and sent to the next process.

[0014] This invention incorporates a waste heat recovery device during the steam heating process of air. This waste heat recovery method solves the problem of recovering waste heat from some uncondensed steam and high-temperature condensate, achieving full utilization of steam thermal energy and improving steam utilization quality.

Claims

1. A device for recovering waste heat from a steam trap, comprising a steam inlet pipe (1), a heating heat exchanger (2), a preheating heat exchanger (3), a steam trap (4), a steam-water separator (5), an electric regulating valve (6), a liquid level sensor (7), a condensate tank (8), a condensate pump (9), a control module (10), and a vent pipe (11), wherein the steam inlet pipe (1) is connected to the top inlet of the heating heat exchanger (2), the bottom of the heating heat exchanger (2) is connected to the inlet of the steam trap (4) through a pipe and a valve, the outlet of the steam trap (4) is connected to the inlet of the steam-water separator (5) through a pipe and a valve, the steam outlet of the steam-water separator (5) is connected to the inlet of the preheating heat exchanger (3) through a pipe, the outlet of the preheating heat exchanger (3) is connected to the inlet of the condensate tank (8) through a pipe, and the outlet of the condensate tank (8) is connected to the condensate pump (9) through a pipe; the condensate outlet of the steam-water separator (5) is connected to the inlet of the condensate tank (8) through a pipe and the electric regulating valve (6), the top of the condensate tank (8) is connected to the vent pipe (11), and the liquid level sensor (7) is installed at the bottom of the steam-water separator (5).

2. The device according to claim 1, characterized in that: The steam trap (4) is installed behind the steam-water separator (5).

3. The device according to claim 1, characterized in that: The steam-water separator (5) is installed with the electric regulating valve (6) and the liquid level sensor (7).

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