Condensate water waste heat recovery device

Abstract

The condensate water waste heat recovery device comprises a flash tank, a desalted water mechanism, a low-pressure condensate water mechanism, a high-pressure condensate water mechanism and two sets of heat exchange mechanisms, a water outlet pipe is fixedly arranged on the flash tank, and the desalted water mechanism comprises a first pipeline and a plurality of first spray heads. The other end of the first pipeline extends out of the flash tank and is fixedly provided with an adjusting valve; the low-pressure condensate water mechanism comprises a second pipeline, one end of the second pipeline penetrates through the flash tank and is fixed with the flash tank, a regulating valve is fixedly arranged at one end penetrating out of the flash tank, and a first nozzle is fixedly arranged on the second pipeline; the high-pressure condensate water mechanism comprises a third pipeline, one end of the third pipeline penetrates through the flash tank and is fixed with the flash tank, a regulating valve is fixedly arranged at the end penetrating through the flash tank, a first spray head is fixedly arranged on the third pipeline, and the heat exchange mechanism is arranged between the desalted water mechanism and the low-pressure condensate water mechanism and between the low-pressure condensate water mechanism and the high-pressure condensate water mechanism. The utility model is used for solving the technical problem of heat loss.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heat energy recycling technical field especially relates to a condensate water waste heat recovery device. BACKGROUND

[0002] In the production process of chemical enterprises, steam is commonly used as process heat source, different processes need steam of different pressure grades, and different pressure grades (0.6-2.0mpa) of condensate water are produced. These high-pressure condensate water is collected to the flash tank through the pipeline, and a part of the condensate water will become flash steam due to the sudden pressure drop. The flash steam has a low pressure, only 0.2mpa, and the heat loss in the conveying process will make it become normal-pressure condensate water again. Generally, it is selected to be diffused, which not only produces "white smoke" and pollutes the environment, but also leads to a large amount of energy and water resources being wasted.

[0003] According to this phenomenon, some enterprises choose to transport desalted water to the flash tank, mix it with condensate water to recover its heat, and then enter the deaerator, thereby reducing the steam consumption of desalted water. However, the existing flash tank is a hollow cavity, which leads to low heat recovery efficiency, and part of the steam is still diffused to the outdoor. At the same time, when the high-pressure condensate water enters the flash tank, it will cause the pressure fluctuation in the flash tank, which affects the stable operation of the equipment and production. UTILITY MODEL CONTENT

[0004] In view of the above problems, the utility model provides a condensate water waste heat recovery device.

[0005] To achieve the above purpose, the utility model relates to a condensate water waste heat recovery device, which comprises a flash tank with a hollow inside, a desalted water mechanism arranged at the top inside the flash tank, a low-pressure condensate water mechanism arranged below the desalted water mechanism inside the flash tank, a high-pressure condensate water mechanism arranged at the bottom inside the flash tank, and two groups of heat exchange mechanisms. The bottom of the flash tank is fixedly provided with a water outlet pipe. The desalted water mechanism comprises a first pipeline arranged radially along the flash tank, and a plurality of first nozzles fixedly arranged at the bottom of the first pipeline. One end of the first pipeline is fixedly arranged on the inner side wall of the flash tank, and the other end of the first pipeline extends out of the side wall of the flash tank and is fixedly provided with an adjusting valve. The low-pressure condensate water mechanism comprises a second pipeline arranged in parallel with the first pipeline. One end of the second pipeline penetrates through the side wall of the flash tank and is fixedly connected with the side wall of the flash tank. An adjusting valve is also fixedly arranged at the end of the second pipeline penetrating through the side wall of the flash tank. A plurality of first nozzles are also fixedly arranged at the bottom of the second pipeline. The high-pressure condensate water mechanism comprises a third pipeline arranged in parallel with the first pipeline. One end of the third pipeline penetrates through the side wall of the flash tank and is fixedly connected with the side wall of the flash tank. An adjusting valve is also fixedly arranged at the end of the third pipeline penetrating through the side wall of the flash tank. A plurality of first nozzles are also fixedly arranged at the bottom of the third pipeline. The two groups of heat exchange mechanisms are arranged between the desalted water mechanism and the low-pressure condensate water mechanism, and between the low-pressure condensate water mechanism and the high-pressure condensate water mechanism.

[0006] Optionally, the heat exchange mechanism comprises a horizontal plate arranged radially along the flash tank, a vertical plate, and a plurality of bubble caps, one end of the horizontal plate is fixedly connected with the side wall of the flash tank along the length direction of the horizontal plate, the vertical plate is vertically fixed on the top surface of the other end of the horizontal plate, a plurality of holes corresponding to the bubble caps are uniformly arranged on the horizontal plate, and the plurality of bubble caps are arranged on the corresponding holes.

[0007] Optionally, the bubble cap comprises an outer cover fixedly arranged on the horizontal plate above the hole, an inner cover arranged in the outer cover, and a connecting pipeline arranged in parallel with the top surface of the horizontal plate and arranged in the inner cover, one side of the outer cover is provided with an opening, a plurality of springs are fixedly arranged between the top of the inner cover and the outer cover, one end of the connecting pipeline is fixedly arranged on the inner cover and communicates with the outside of the inner cover, the other end of the connecting pipeline is closed, and a plurality of second nozzles are fixedly arranged on the bottom of the connecting pipeline, the connecting pipeline and the opening of the outer cover are not on the same horizontal line, the inner cover is vertically movable, and the opening of the outer cover is located on the movement path of the connecting pipeline.

[0008] Optionally, the two groups of heat exchange mechanisms are alternately arranged with the desalted water mechanism, the low-pressure condensate water mechanism and the high-pressure condensate water mechanism, and are spaced apart by 25 cm.

[0009] Optionally, a safety valve is fixedly arranged on the water outlet pipe.

[0010] Optionally, a thermometer is fixedly arranged on the flash tank.

[0011] Optionally, a pressure gauge is fixedly arranged on the flash tank.

[0012] Optionally, a support is fixedly arranged on the bottom of the flash tank.

[0013] The beneficial effects of the present application are as follows:

[0014] In use, desalted water is introduced into the desalted water mechanism, low-pressure condensate water is introduced into the low-pressure condensate water mechanism, and high-pressure condensate water is introduced into the high-pressure condensate water mechanism, after starting operation, high-temperature condensate water, high-temperature steam, low-pressure condensate water and low-temperature steam are continuously generated, the heat exchange mechanism can make the low-temperature condensate water and the high-temperature steam fully contact to recover the heat and water in the high-temperature steam, the desalted water and the low-temperature steam can also fully contact through the heat exchange mechanism to recover the heat and water in the low-temperature steam, and the pressure in the flash tank can be kept stable, the desalted water and the condensate water which have absorbed heat are fully mixed and then enter the deaerator to reduce steam consumption of the deaerator. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0016] Figure 1 is a schematic diagram of the overall structure of the present application.

[0017] Figure 2 Figure 2 is a partial cross-sectional view for showing the desalted water mechanism and the low-pressure condensate water mechanism.

[0018] Figure 3 Figure 3 is a partial cross-sectional view for showing the bubble cap.

[0019] BRIEF DESCRIPTION OF DRAWINGS

[0020] 1, flash tank; 11, bracket; 12, water outlet pipe; 13, pressure gauge; 2, desalted water mechanism; 21, first pipeline; 22, first spray head; 23, regulating valve; 3, low-pressure condensate water mechanism; 31, second pipeline; 4, high-pressure condensate water mechanism; 41, third pipeline; 5, heat exchange mechanism; 51, horizontal plate; 52, vertical plate; 53, bubble cap; 531, inner cover; 532, outer cover; 533, connecting pipeline; 5331, second spray head; 534, spring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application. In the following description, a large number of specific details are set forth in order to give a sufficient understanding of the present application, but the present application can also be implemented in other manners different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0022] Referring to Figure 1 A condensate water waste heat recovery device, comprising a flash tank 1, a desalted water mechanism 2, a low-pressure condensate water mechanism 3, a high-pressure condensate water mechanism 4, and a heat exchange mechanism 5. The flash tank 1 is internally hollow, and a bracket 11 is fixedly arranged at the bottom end of the flash tank 1. A water outlet pipe 12 is fixedly arranged at the bottom of the flash tank 1 and communicates with the inside of the flash tank 1, and a safety valve (not shown in the figure) is fixedly arranged on the water outlet pipe 12. A thermometer (not shown in the figure) and a pressure gauge 13 are fixedly arranged at the top end of the outer side wall of the flash tank 1, for controlling the temperature and pressure to be stable. The desalted water mechanism 2 is arranged at the top end inside the flash tank 1, for storing desalted water. The low-pressure condensate water mechanism 3 is arranged below the desalted water mechanism 2 inside the flash tank 1, for storing low-pressure condensate water. The high-pressure condensate water mechanism 4 is arranged below the low-pressure condensate water mechanism 3 inside the flash tank 1, for storing high-pressure condensate water. The heat exchange mechanism 5 is two groups, and the two groups of heat exchange mechanisms 5 are arranged between the desalted water mechanism 2 and the low-pressure condensate water mechanism 3, and between the low-pressure condensate water mechanism 3 and the high-pressure condensate water mechanism 4, and are arranged with an interval of 25 cm, for recovering heat and moisture.

[0023] When in use, desalted water is fed into the desalted water mechanism 2, low-pressure condensate water is fed into the low-pressure condensate water mechanism 3, and high-pressure condensate water is fed into the high-pressure condensate water mechanism 4. After the device is started, the high-pressure condensate water will enter the bottom of the flash tank 1, and high-temperature condensate water and high-temperature steam will be continuously generated. After the low-pressure condensate water enters the flash tank 1, low-temperature condensate water and low-temperature steam will be generated. The heat exchange mechanism 5 can make the low-temperature condensate water fully contact with the high-temperature steam to recover the heat and water in the high-temperature steam. The desalted water can also fully contact with the low-temperature steam through the heat exchange mechanism 5 to recover the heat and water in the low-temperature steam. Finally, the steam absorbed heat will become condensate water accumulated at the bottom of the flash tank 1. By controlling the amount of desalted water, the pressure in the flash tank 1 can be controlled at normal pressure. Finally, the desalted water absorbed heat and the condensate water are fully mixed and then enter the deaerator, so that the steam consumption of the deaerator can be reduced.

[0024] With reference to Figure 2 The desalted water mechanism 2 comprises a first pipeline 21 and a first spray head 22. The first pipeline 21 is arranged at the top end of the flash tank 1 in the radial direction. One end of the first pipeline 21 is fixed to the inner side wall of the flash tank 1, and the other end extends out of the side wall of the flash tank 1 and is fixed with an adjusting valve 23. The first spray head 22 is in a plurality, which are uniformly fixed to the bottom of the first pipeline 21 and connected with the inside of the first pipeline 21. The low-pressure condensate water mechanism 3 comprises a second pipeline 31, which is arranged below the first pipeline 21 in the flash tank 1 in parallel with the first pipeline 21. One end of the second pipeline 31 away from the first pipeline 21 penetrates through the side wall of the flash tank 1 and is fixedly connected with the flash tank 1. The other end of the second pipeline 31 also penetrates through the side wall of the flash tank 1 and is fixed with an adjusting valve 23. The bottom of the second pipeline 31 is also uniformly fixed with a plurality of first spray heads 22. The high-pressure condensate water mechanism 4 comprises a third pipeline 41, which is arranged below the second pipeline 31 in the flash tank 1 in parallel with the first pipeline 21. One end of the third pipeline 41 away from the second pipeline 31 penetrates through the side wall of the flash tank 1 and is fixedly connected with the flash tank 1. The other end of the third pipeline 41 also penetrates through the side wall of the flash tank 1 and is fixed with an adjusting valve 23. The bottom of the third pipeline 41 is also uniformly fixed with a plurality of first spray heads 22.

[0025] With reference to Figure 3The heat exchange mechanism 5 comprises a horizontal plate 51, a vertical plate 52 and a plurality of bubble caps 53. The horizontal plate 51 is arranged along the radial direction of the flash tank 1 and is fixedly connected to the side wall of the flash tank 1 at one end along the length direction of the horizontal plate 51. The vertical plate 52 is vertically fixed to the top surface of the other end of the horizontal plate 51. The bubble caps 53 are arranged on the horizontal plate 51 in a one-to-one correspondence with a plurality of holes, which are used for the inlet and outlet of steam. The bubble caps 53 are arranged on the corresponding holes and communicate with the holes. The holes are vertical through holes arranged on the horizontal plate 51. The bubble cap 53 comprises an outer cover 532, an inner cover 531 and a connecting pipe 533. The outer cover 532 is fixedly arranged on the horizontal plate 51 above the hole. An opening is arranged on one side of the outer cover 532, so that water can flow into the inner cover 531 from the opening. The inner cover 531 is arranged inside the outer cover 532 above the hole. A plurality of springs 534 are uniformly arranged between the outer top surface of the inner cover 531 and the inner top surface of the inner cover 531. The connecting pipe 533 is arranged parallel to the top surface of the horizontal plate 51 and inside the inner cover 531. One end of the connecting pipe 533 is fixedly arranged on the inner cover 531 and communicates with the outside of the inner cover 531. The other end of the connecting pipe 533 is closed. A plurality of second spray heads 5331 are uniformly arranged on the bottom of the connecting pipe 533. When not in use, the springs 534 are in a stretched state. The connecting pipe 533 and the opening of the outer cover 532 are not on the same horizontal line. The inner cover 531 can move vertically. The opening of the outer cover 532 is located on the moving path of the connecting pipe 533.

[0026] When in use, the adjusting valves 23 are opened. The high-pressure condensed water and the low-pressure condensed water are sprayed. The high-pressure condensed water is sprayed to the bottom of the flash tank 1, so that the high-pressure steam moves upward from the bottom of the flash tank 1. The low-pressure condensed water is sprayed to the horizontal plate 51 of the heat exchange mechanism 5 below, so that the heat and the moisture are recovered. Specifically, when the high-pressure steam enters the inner cover 531 through the hole, the pressure in the inner cover 531 increases. Due to the pressure difference between the inside and the outside, the length of the spring 534 is shortened. The opening of the inner cover 531 is on the same horizontal line as the opening of the outer cover 532. Therefore, the flow rate of the low-pressure condensed water on the horizontal plate 51 into the connecting pipe 533 is increased. The amount of water sprayed from the second spray head 5331 at the bottom of the connecting pipe 533 is increased. More low-pressure condensed water is mixed with the high-pressure steam to recover the heat. Similarly, when the spraying of the high-pressure condensed water is stopped, the pressure in the inner cover 531 decreases. The length of the spring 534 is pulled. The opening of the inner cover 531 is not on the same horizontal line as the opening of the outer cover 532. Therefore, the flow rate of the low-pressure condensed water on the horizontal plate 51 into the connecting pipe 533 is decreased. The amount of water sprayed from the second spray head 5331 at the bottom of the connecting pipe 533 is decreased. Through the arrangement of the bubble cap 53, the amount of water sprayed from the second spray head 5331 can be continuously adjusted according to the pressure of the steam. More steam is recovered for heat recovery. After the steam is absorbed for heat recovery, the steam becomes condensed water and is accumulated at the bottom of the flash tank 1. Therefore, the stability of the pressure in the flash tank 1 is maintained.

[0027] The use principle of the utility model is: when using, the desalted water is passed into the desalted water mechanism 2, the low pressure condensate water is passed into the low pressure condensate water mechanism 3, the high pressure condensate water is passed into the high pressure condensate water mechanism 4, after starting to run, high temperature condensate water, high temperature steam, low pressure condensate water, low temperature steam are continuously produced, the heat exchange mechanism 5 can make the low temperature condensate water and high temperature steam fully contact, and recover the heat and moisture in the high temperature steam; also can make the desalted water and low temperature steam fully contact through the heat exchange mechanism 5, recover the heat and moisture in the low temperature steam, and also can keep the pressure in the flash tank 1 stable.

[0028] Obviously, the described embodiments are only part of the embodiments of the utility model, not all. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

Claims

1. A condensate waste heat recovery device, characterized in that: The system includes a hollow flash tank (1), a demineralized water mechanism (2) located at the top of the flash tank (1), a low-pressure condensate mechanism (3) located below the demineralized water mechanism (2) inside the flash tank (1), a high-pressure condensate mechanism (4) located at the bottom of the flash tank (1), and two sets of heat exchange mechanisms (5). A water outlet pipe (12) is fixedly installed at the bottom of the flash tank (1). The demineralized water mechanism (2) includes a first pipe (21) arranged radially along the flash tank (1) and multiple first nozzles (22) fixedly installed at the bottom of the first pipe (21). One end of the first pipe (21) is fixedly installed on the inner wall of the flash tank (1), and the other end extends out of the side wall of the flash tank (1) and is fixedly equipped with a regulating valve (23). The low-pressure condensate mechanism (3) includes a second pipe (3) arranged parallel to the first pipe (21). 1) One end of the second pipe (31) passes through the side wall of the flash tank (1) and is fixedly connected to it, and a regulating valve (23) is also fixedly provided at the end that passes through the side wall of the flash tank (1). Multiple first nozzles (22) are also fixedly provided at the bottom of the second pipe (31). The high-pressure condensate mechanism (4) includes a third pipe (41) arranged parallel to the first pipe (21). One end of the third pipe (41) passes through the side wall of the flash tank (1) and is fixedly connected to it, and a regulating valve (23) is also fixedly provided at the end that passes through the side wall of the flash tank (1). Multiple first nozzles (22) are also fixedly provided at the bottom of the third pipe (41). The two sets of heat exchange mechanisms (5) are respectively arranged between the demineralized water mechanism (2) and the low-pressure condensate mechanism (3), and between the low-pressure condensate mechanism (3) and the high-pressure condensate mechanism (4).

2. The condensate waste heat recovery device according to claim 1, characterized in that: The heat exchange mechanism (5) includes a horizontal plate (51), a vertical plate (52), and a plurality of bubble caps (53) arranged radially along the flash tank (1). One end of the horizontal plate (51) along its length is fixedly connected to the side wall of the flash tank (1). The vertical plate (52) is vertically fixed on the top surface of the other end of the horizontal plate (51). A plurality of channels corresponding to the bubble caps (53) are evenly opened on the horizontal plate (51), and the plurality of bubble caps (53) are respectively arranged on the corresponding channels.

3. The condensate waste heat recovery device according to claim 2, characterized in that: The blister pack (53) includes an outer cover (532) fixed on the horizontal plate (51) above the channel, an inner cover (531) disposed inside the outer cover (532), and a connecting pipe (533) disposed parallel to the top surface of the horizontal plate (51) and disposed inside the inner cover (531). An opening is provided on one side of the outer cover (532). Multiple springs (534) are fixed between the top of the inner cover (531) and the outer cover (532). One end of the connecting pipe (533) is fixed on the inner cover (531) and communicates with the outside of the inner cover (531), while the other end is closed. Multiple second nozzles (5331) are fixed at the bottom. The opening of the connecting pipe (533) and the outer cover (532) are not on the same horizontal line. The inner cover (531) can move vertically. The opening of the outer cover (532) is located on the moving path of the connecting pipe (533).

4. The condensate waste heat recovery device according to claim 1, characterized in that: The two sets of heat exchange mechanisms (5) are alternately arranged with the demineralized water mechanism (2), the low-pressure condensate mechanism (3), and the high-pressure condensate mechanism (4), with a vertical spacing of 25cm.

5. The condensate waste heat recovery device according to claim 1, characterized in that: A safety valve is fixedly installed on the water outlet pipe (12).

6. The condensate waste heat recovery device according to claim 1, characterized in that: A thermometer is fixedly installed on the flash tank (1).

7. The condensate waste heat recovery device according to claim 1, characterized in that: A pressure gauge (13) is fixedly installed on the flash tank (1).

8. The condensate waste heat recovery device according to claim 1, characterized in that: The flash tank (1) is fixedly provided with a support (11) at the bottom.

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