Deaerator dead steam heat energy and condensed water recovery device

Abstract

The utility model discloses a deaerator dead steam heat energy and condensed water recovery device, which relates to the technical field of deaerator dead steam heat energy and condensed water recovery, and comprises a deaerator, a discharge pipeline is arranged at one end of the deaerator, a second valve is arranged at one end of the discharge pipeline, and a first pipeline is arranged in the middle of the discharge pipeline. A third valve is arranged at one end of the first pipeline, and a heat exchanger is arranged at the other end of the first pipeline. According to the utility model, through heat exchange in the tubular heat exchanger, heat of dead steam at the outlet of the deaerator is recovered, the dead steam is changed into condensed water through condensation for recovery, and in the process of recovering the condensed water, enough separation space is provided in the shell pass of the heat exchanger, so that oxygen carried in the dead steam can be separated from the condensed water and discharged; desalted water dissolved oxygen after condensed water recovery is guaranteed to be within a control range, in the process of recovering heat condensed water, power consumption is not increased, heat exchange media are not increased, operation is stable, and control is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust steam heat energy and condensate water recovery of a deaerator, in particular to an exhaust steam heat energy and condensate water recovery device of a deaerator. Background Art

[0002] A deaerator is a device used to remove dissolved oxygen from water.

[0003] In coking, power plants and chemical enterprises, boiler feed water deoxygenation system is a key link. Most of the enterprises are equipped with thermal desalters. Thermal deaerators need to continuously discharge steam with high oxygen content and some non-condensable gases during operation. This exhaust steam contains high heat and high-quality desalted water, which on the one hand causes the loss of heat and water resources, and on the other hand also causes environmental problems such as air pollution and exhaust noise. The utility model is to condense the steam carried in the exhaust steam of the deaerator, and recover the heat energy of the exhaust steam while recovering the condensed water, thereby improving the economic benefits. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a deaerator exhaust steam heat energy and condensate water recovery device.

[0005] In order to solve the problems existing in the prior art, the utility model adopts the following technical solutions:

[0006] A deaerator exhaust steam heat energy and condensate recovery device comprises a deaerator, a discharge pipeline is arranged at one end of the deaerator, a second valve is arranged at one end of the discharge pipeline, a first pipeline is arranged in the middle of the discharge pipeline, a third valve is arranged at one end of the first pipeline, a heat exchanger is arranged at the other end of the first pipeline, an air discharge pipeline is arranged at the outlet of the heat exchanger, a T2 temperature monitor is arranged at one end of the air discharge pipeline, and the third valve and the first pipeline are connected to the shell side of the heat exchanger.

[0007] Preferably, a pipeline is provided at the other end of the first pipeline, one end of the pipeline is provided at the heat exchanger, a fifth valve is provided at one end of the pipeline, and a T1 thermometer is provided on the pipeline between the first pipeline and the fifth valve.

[0008] Preferably, a bypass pipeline is provided at the other end of the pipeline, a sixth valve is provided in the middle of the bypass pipeline, a third pipeline is provided at one end of the bypass pipeline, a first valve is provided in the middle of the third pipeline, and one end of the third pipeline is provided on the heat exchanger.

[0009] Preferably, a second pipeline is provided at the lower end of the heat exchanger, one end of the second pipeline intersects with one end of the third pipeline, and a fourth valve is provided at one end of the second pipeline.

[0010] Preferably, the outer surface of the heat exchanger is provided with fins, a water inlet main pipe is provided at one end of the third pipe, the water inlet main pipe is arranged next to the fins, the condensate outlet is at the bottom of the heat exchanger, and a water outlet main pipe is provided on the outer surface of the heat exchanger, and the water outlet main pipe is arranged at one end of the pipeline.

[0011] Preferably, the fourth valve is connected to the water inlet pipeline at the top of the desalted water tank, the pipeline is connected to the deaerator or other desalted water users, the desalted water pipeline is provided with a bypass pipeline and a sixth valve, and the third pipeline and the first valve are connected to the heat exchanger tube inlet.

[0012] Preferably, the deaerator exhaust steam recovery heat exchanger is a shell and tube heat exchanger, and the shell and tube are multi-pass.

[0013] Preferably, the shell side outlet vent pipe of the heat exchanger is not provided with a valve, the shell side is operated without pressure, and the bottom of the heat exchanger is arranged on the upper surface of the deaerator platform.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] In the utility model, heat is exchanged in a tube-and-tube heat exchanger, which not only recovers the heat of the exhaust steam at the outlet of the deaerator, but also converts the exhaust steam into condensed water for recycling by condensation. In the process of recycling condensed water, sufficient separation space is provided in the shell side of the heat exchanger, so that the oxygen carried in the exhaust steam can be separated from the condensed water and discharged, ensuring that the dissolved oxygen in the desalted water is within the control range after the condensed water is recycled. In the process of recycling the condensed water with heat, the power consumption is not increased, the heat exchange medium is not increased, the operation is stable, and it is easy to control; BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 It is a schematic diagram of the process structure of the utility model;

[0018] Serial numbers in the figure: 1. heat exchanger; 2. deaerator; 3. first valve; 4. discharge pipeline; 5. second valve; 6. third valve; 7. first pipeline; 8. air discharge pipeline; 9. second pipeline; 10. fourth valve; 11. fin; 12. fifth valve; 13. pipeline; 14. bypass pipeline; 15. sixth valve; 16. third pipeline; 17. water inlet main; 18. T1 thermometer; 19. T2 temperature monitor; 20. water outlet main. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Example 1: This example provides a deaerator exhaust steam heat energy and condensate recovery device, see Figure 1 Specifically, it includes a deaerator 2, a discharge pipeline 4 is provided at one end of the deaerator 2, a second valve 5 is provided at one end of the discharge pipeline 4, a first pipeline 7 is provided in the middle of the discharge pipeline 4, a third valve 6 is provided at one end of the first pipeline 7, a heat exchanger 1 is provided at the other end of the first pipeline 7, an air discharge pipeline 8 is provided at the outlet of the heat exchanger 1, a T2 temperature monitoring meter 19 is provided at one end of the air discharge pipeline 8, the third valve 6 and the first pipeline 7 are connected to the shell side of the heat exchanger 1, and the first pipeline 7 is provided at the other end of the heat exchanger 1. A pipeline 13 is provided at the other end, one end of the pipeline 13 is provided at the heat exchanger 1, a fifth valve 12 is provided at one end of the pipeline 13, a T1 thermometer 18 is provided on the pipeline 13 between the first pipeline 7 and the fifth valve 12, a bypass pipeline 14 is provided at the other end of the pipeline 13, a sixth valve 15 is provided in the middle of the bypass pipeline 14, a third pipeline 16 is provided at one end of the bypass pipeline 14, a first valve 3 is provided in the middle of the third pipeline 16, and one end of the third pipeline 16 is provided on the heat exchanger 1;

[0021] A second pipe 9 is provided at the lower end of the heat exchanger 1, one end of the second pipe 9 intersects with one end of the third pipe 16, a fourth valve 10 is provided at one end of the second pipe 9, a fin 11 is provided on the outer surface of the heat exchanger 1, a water inlet main pipe 17 is provided at one end of the third pipe 16, the water inlet main pipe 17 is arranged next to the fin 11, the condensate outlet is at the bottom of the heat exchanger 1, a water outlet main pipe 20 is provided on the outer surface of the heat exchanger 1, the water outlet main pipe 20 is arranged at one end of the pipeline 13, the fourth valve 10 is connected to the water inlet pipeline at the top of the desalted water tank, the pipeline 13 is connected to the deaerator 2 or other desalted water users, the desalted water pipeline is provided with a bypass pipeline 14 and a sixth valve 15, the third pipeline 16 and the first valve 3 are connected to the tube side inlet of the heat exchanger 1, the exhaust steam recovery heat exchanger 1 of the deaerator 2 is a shell and tube heat exchanger, the shell and tube are multi-pass, the shell side outlet vent pipe of the heat exchanger 1 is not provided with a valve, the shell side is pressure-free operation, and the bottom of the heat exchanger 1 is arranged on the upper surface of the deaerator platform;

[0022] The exhaust steam at the outlet of the deaerator 2 passes through the third valve 6, the exhaust steam recovery first pipeline 7, and enters the shell side of the heat exchanger 1. It exchanges heat with the desalted water in the tube through the fins 11. The exhaust steam releases latent heat and becomes condensed water. In order to separate the non-condensable gas and oxygen carried by the exhaust steam from the condensed water, the shell side of the heat exchanger 1 must have enough circulation space. The exhaust steam is completely condensed into condensed water through heat exchange, and passes through the bottom outlet of the heat exchanger 1, the fourth valve 10, the second pipeline 9, and enters the desalted water tank by using the potential difference, so as to achieve the purpose of recovering condensed water.

[0023] The desalted water from the desalted water pump enters the tube side of the heat exchanger 1 through the third pipeline 16, the first valve 3, and the water inlet main pipe 17. It enters and flows out of the tube side multiple times and fully exchanges heat with the exhaust steam. After the desalted water recovers the exhaust heat, it passes through the water outlet main pipe 20, the fifth valve 12, the T1 thermometer 18, and the pipeline 13, and then can directly enter the deaerator 2, or it can be sent to other desalted water users according to actual conditions.

[0024] Specifically, the working principle and operation method of the utility model are as follows:

[0025] Step 1: Through heat exchange in the tube heat exchanger 1, the heat of the exhaust steam at the outlet of the deaerator 2 is recovered, and the exhaust steam is converted into condensed water for recovery by condensation. In the process of recovering the condensed water, sufficient separation space is provided in the shell side of the heat exchanger 1, so that the oxygen carried in the exhaust steam can be separated from the condensed water and discharged, ensuring that the dissolved oxygen in the desalted water is within the control range after the condensed water is recovered. In the process of recovering the heat condensed water, the power consumption is not increased, the heat exchange medium is not increased, the operation is stable, and it is easy to control;

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A deaerator exhaust steam heat energy and condensate recovery device, comprising a deaerator (2), characterized in that: A discharge pipeline (4) is provided at one end of the deaerator (2), a second valve (5) is provided at one end of the discharge pipeline (4), a first pipeline (7) is provided in the middle of the discharge pipeline (4), a third valve (6) is provided at one end of the first pipeline (7), a heat exchanger (1) is provided at the other end of the first pipeline (7), an air discharge pipeline (8) is provided at the outlet of the heat exchanger (1), a T2 temperature monitor (19) is provided at one end of the air discharge pipeline (8), and the third valve (6) and the first pipeline (7) are connected to the shell side of the heat exchanger (1).

2. A deaerator exhaust steam heat energy and condensate recovery device according to claim 1, characterized in that: A pipeline (13) is provided at the other end of the first pipeline (7), one end of the pipeline (13) is provided at the heat exchanger (1), a fifth valve (12) is provided at one end of the pipeline (13), and a T1 thermometer (18) is provided on the pipeline (13) between the first pipeline (7) and the fifth valve (12).

3. The deaerator exhaust steam heat energy and condensate water recovery device according to claim 1, characterized in that: A bypass pipeline (14) is provided at the other end of the pipeline (13), a sixth valve (15) is provided in the middle of the bypass pipeline (14), a third pipeline (16) is provided at one end of the bypass pipeline (14), a first valve (3) is provided in the middle of the third pipeline (16), and one end of the third pipeline (16) is provided on the heat exchanger (1).

4. A deaerator exhaust steam heat energy and condensate recovery device according to claim 3, characterized in that: A second pipe (9) is provided at the lower end of the heat exchanger (1), one end of the second pipe (9) intersects with one end of the third pipe (16), and a fourth valve (10) is provided at one end of the second pipe (9).

5. A deaerator exhaust steam heat energy and condensate recovery device according to claim 3, characterized in that: The outer surface of the heat exchanger (1) is provided with fins (11); one end of the third pipe (16) is provided with a water inlet main pipe (17); the water inlet main pipe (17) is arranged next to the fins (11); the condensate outlet is at the bottom of the heat exchanger (1); the outer surface of the heat exchanger (1) is provided with a water outlet main pipe (20); the water outlet main pipe (20) is arranged at one end of the pipeline (13).

6. A deaerator exhaust steam heat energy and condensate recovery device according to claim 4, characterized in that: The fourth valve (10) is connected to the water inlet pipeline at the top of the desalted water tank, the pipeline (13) is connected to the deaerator (2) or other desalted water users, the desalted water pipeline is provided with a bypass pipeline (14) and a sixth valve (15), and the third pipeline (16) and the first valve (3) are connected to the pipe inlet of the heat exchanger (1).

7. The deaerator exhaust steam heat energy and condensate water recovery device according to claim 1, characterized in that: The exhaust steam recovery heat exchanger (1) of the deaerator (2) is a shell-and-tube heat exchanger, and the shell-and-tube is multi-pass.

8. The deaerator exhaust steam heat energy and condensate water recovery device according to claim 1, characterized in that: The shell side outlet vent pipe of the heat exchanger (1) is not provided with a valve, the shell side is operated without pressure, and the bottom of the heat exchanger (1) is arranged on the upper surface of the deaerator platform.

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