Condensate water system with plate heat exchanger

Abstract

The utility model discloses a condensate water system with a plate heat exchanger, which is used for a thermal power plant and comprises a water receiving pipe, a heat exchange module, a water return module and a deaerator. The water receiving pipe comprises a first water receiving pipe for receiving chemical condensate water and a second water receiving pipe for receiving paper machine condensate water; the heat exchange module comprises a first heat exchange assembly, a second heat exchange assembly and a third heat exchange assembly, and the first water receiving pipe is selectively connected with the first heat exchange assembly or the third heat exchange assembly; the second water receiving pipe is selectively connected with the second heat exchange assembly and the third heat exchange assembly, and the third heat exchange assembly receives one of chemical engineering condensate water and paper machine condensate water at the same time; the water return module comprises a first water return pipeline connected with the first heat exchange assembly and the third heat exchange assembly and a second water return pipeline connected with the second heat exchange assembly and the third heat exchange assembly. The deaerator is connected with the first heat exchange assembly. Compared with the prior art, the heat exchange assemblies are arranged, heat exchange between condensate water and a cold source is enhanced, and the energy utilization rate is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of condensate water systems with plate heat exchanger, belong to thermal energy and power engineering field. BACKGROUND

[0002] Steam turbine does work to the outside supply gas, user end uses the condensate formed after steam and carries a large amount of heat energy. The existing condensate water treatment is usually through direct contact and mixing with the medium needing heating to realize the transfer of heat, which leads to the following problems: 1. Condensate water and medium direct contact will pollute each other, affect water quality and medium; 2. Direct contact heat exchange, there will be a certain amount of heat loss; 3. For some corrosive or dangerous medium, leakage or explosion may occur during the process of direct contact heat exchange.

[0003] Therefore, it is necessary to improve the existing condensate water system to solve the above problems. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, the utility model provides a kind of condensate water systems with plate heat exchanger, which can recover heat and transfer it to other medium needing heating through heat exchange between condensate water and cold source, reduce energy waste and improve energy utilization efficiency.

[0005] The technical scheme of the utility model is:

[0006] A kind of condensate water systems with plate heat exchanger, for thermal power plant, comprising:

[0007] Water pipe, at least two, and independent of each other, first water pipe is used to receive chemical condensate water, second water pipe is used to receive paper machine condensate water;

[0008] Heat exchange module, including independent first heat exchange component, second heat exchange component and third heat exchange component, the first water pipe is selectively connected to the first heat exchange component or the third heat exchange component;Second water pipe is selectively connected to the second heat exchange component and the third heat exchange component is connected, in the same time, the third heat exchange component can only receive one of the chemical condensate water and the paper machine condensate water;

[0009] Water return module, including first water return pipeline and second water return pipeline, the first water return pipeline is connected to the first heat exchange component and the third heat exchange component respectively, and receives chemical condensate water flowing out of the first heat exchange component or the third heat exchange component;Second water return pipeline is connected to the third heat exchange component, and receives paper machine condensate water flowing out of the third heat exchange component;

[0010] An oxygen remover is connected to the first heat exchange component.

[0011] As a further improvement of the present application, the water receiving pipe further comprises a third water receiving pipe independent of the first water receiving pipe and the second water receiving pipe, the third water receiving pipe is used for receiving desalted water, the third water receiving pipe is connected to the first heat exchange component and is selectively connected to the second heat exchange component.

[0012] As a further improvement of the present application, the condensate water system further comprises a heater connected between the third water receiving pipe and the first heat exchange component, the desalted water enters the oxygen remover after passing through the second heat exchange component, the heater and the first heat exchange component, or the desalted water enters the oxygen remover after passing through the heater and the first heat exchange component.

[0013] As a further improvement of the present application, the second heat exchange component can simultaneously receive one or more of the desalted water and the paper machine condensate water at the same time.

[0014] As a further improvement of the present application, the third heat exchange component comprises a first heat exchange device and a second heat exchange device independent of each other, and an activatable communication door is arranged between the first heat exchange device and the second heat exchange device, so that the first heat exchange device and the second heat exchange device independently or jointly receive the chemical condensate water from the first water receiving pipe or the paper machine condensate water from the second water receiving pipe.

[0015] As a further improvement of the present application, the communication door comprises a first communication door bidirectionally connecting the first heat exchange device and the second heat exchange device, a second communication door unidirectionally connecting the second heat exchange device and the first backwater pipe, a third communication door unidirectionally connecting the second water receiving pipe and the first heat exchange device, and a fourth communication door unidirectionally connecting the second water receiving pipe and the second heat exchange device, the first communication door, the second communication door, the third communication door and the fourth communication door are independent of each other and are selectively activated or closed.

[0016] As a further improvement of the present application, the second backwater pipe comprises a first backwater pipe and a second backwater pipe, the first backwater pipe and the second backwater pipe are respectively connected to the first heat exchange device and the second water receiving pipe, and the second backwater pipe is connected to the second heat exchange device, the first backwater pipe and the second backwater pipe are respectively connected to independent water storage tanks to introduce the paper machine condensate water treated by the first heat exchange device, the second heat exchange device or the second heat exchange component into the corresponding water storage tank.

[0017] As a further improvement of the present application, a water storage tank independent of the water storage tank is further arranged between the second water receiving pipe and the third heat exchange component, and the water stored in the water storage tank and the water storage tank is different in temperature.

[0018] As a further improvement of the utility model, the first water pipe and the first heat exchange component, the first water pipe and the third heat exchange component are further provided with a booster component, and the booster component is used for boosting the chemical condensate water.

[0019] As a further improvement of the utility model, the condensate water system further comprises a water storage pool connected with the first water return pipeline, and the water storage pool is used for storing the chemical condensate water flowing out after the first heat exchange component or the third heat exchange component.

[0020] The beneficial technical effects of the utility model are as follows: the first water pipe can be selectively connected with the first heat exchange component or the third heat exchange component, the second water pipe can be selectively connected with the second heat exchange component and the third heat exchange component, and then when the first water pipe is connected with the first heat exchange component, the first heat exchange component can absorb heat energy and transmit the heat energy to the deaerator for use, and when the second water pipe is connected with the second heat exchange component or the third heat exchange component, different use scenarios can be adapted. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structure block diagram of the condensate water system with the plate heat exchanger according to the preferred embodiment of the utility model.

[0022] Figure 2 is a structure block diagram of the condensate water system with the plate heat exchanger according to the preferred embodiment of the utility model.

[0023] Figure 3 is Figure 2 the structure block diagram of the first water pipe and the first heat exchange component in the first water pipe and the first heat exchange component.

[0024] Figure 4 is Figure 2 the structure block diagram of the second water pipe, the third water pipe and the second heat exchange component in the second water pipe, the third water pipe and the second heat exchange component.

[0025] Figure 5 is Figure 2 the structure block diagram of the third heat exchange component in the third heat exchange component.

[0026] REFERENCE SIGNS:

[0027] 100 - condensate water system;

[0028] 1 - water pipe, 11 - first water pipe, 12 - second water pipe, 13 - third water pipe, 14 - partition door;

[0029] 2 - heat exchange module, 21 - first heat exchange assembly, 22 - second heat exchange assembly, 23 - third heat exchange assembly, 231 - first heat exchange device, 232 - second heat exchange device, 233 - connecting door, 2331 - first connecting door, 2332 - second connecting door, 2333 - third connecting door, 2334 - fourth connecting door;

[0030] 3 - return water module, 31 - first return water pipeline, 321 - second return water pipe, 322 - second return water pipe;

[0031] 4 - water storage tank;

[0032] 5 - water storage tank;

[0033] 6 - water storage tank;

[0034] 7 - deaerator;

[0035] 8 - heater;

[0036] 9 - booster assembly. DETAILED DESCRIPTION

[0037] In order to make the technical means of the utility model more clearly understood, and can be implemented according to the content of the specification, the specific embodiments of the utility model are further described in detail below, the following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0038] Please refer to Figures 1 to 5 As shown in the figure, the utility model discloses a condensate water system 100 of plate heat exchanger, for thermal power plant.The condensate water system 100 includes water pipe 1, heat exchange module 2, return water module 3, the condensate water system 100 is through the water pipe 1 and is taken external condensate water, after the heat of condensate water is absorbed by heat exchange module 2, through return water module 3, condensate water is stored.

[0039] In the embodiment, the water pipe 1 is provided with at least two, and is independent of each other.The first water pipe 11 is used to support chemical condensate water, and the second water pipe 12 is used to support paper machine condensate water.The return water module 3 is provided with a first return water pipeline 31 and a second return water pipeline, the first return water pipeline 31 is used to support chemical condensate water after heat exchange module 2, and the second return water pipeline is used to support paper machine condensate water after heat exchange module 2.

[0040] The heat exchange module 2 comprises a first heat exchange assembly 21, a second heat exchange assembly 22 and a third heat exchange assembly 23 which are independent of each other, the first water pipe 11 is selectively connected to the first heat exchange assembly 21 or the third heat exchange assembly 23, and the second water pipe 12 is selectively connected to the second heat exchange assembly 22 and the third heat exchange assembly 23. Preferably, the first water pipe 11 and the second water pipe 12 are both provided with a partition door 14, and by activating the partition door 14, the first water pipe 11 and the second water pipe 12 can be connected to the corresponding heat exchange assembly. Therefore, flexible switching can be realized according to actual needs.

[0041] The first water return pipe 31 is connected to the first heat exchange assembly 21 and the third heat exchange assembly 23 respectively, and receives the chemical condensate water flowing out of the first heat exchange assembly 21 or the third heat exchange assembly 23, and the second water return pipe is connected to the third heat exchange assembly 23 and the second water pipe 12, and receives the paper machine condensate water flowing out of the third heat exchange assembly 23 or the second water pipe 12. At this time, the water flowing out of the second water pipe 12 is treated by the second heat dissipation assembly 22.

[0042] The third heat exchange assembly 23 comprises a first heat exchange device 231 and a second heat exchange device 232 which are independent of each other, and an activatable communication door 233 is arranged between the first heat exchange device 231 and the second heat exchange device 232, so that the first heat exchange device 231 and the second heat exchange device 232 independently or jointly receive the chemical condensate water from the first water pipe 11 or the paper machine condensate water from the second water pipe 12. That is, the first heat exchange device 231 and the second heat exchange device 232 can be selectively communicated with each other, so as to distribute which heat exchange device or two heat exchange devices to complete the heat absorption of the chemical condensate water or the paper machine condensate water according to the amount of condensate water and actual needs.

[0043] The communication door 233 comprises a first communication door 2331 which bidirectionally communicates the first heat exchange device 231 and the second heat exchange device 232, a second communication door 2332 which unidirectionally communicates the second heat exchange device 232 and the first water return pipe 31, a third communication door 2333 which unidirectionally communicates the second water pipe 12 and the first heat exchange device 231, and a fourth communication door 2334 which unidirectionally communicates the second water pipe 12 and the second heat exchange device 232, and the first communication door 2331, the second communication door 2332, the third communication door 2333 and the fourth communication door 2334 are independent of each other and can be selectively activated or closed. That is, by arranging four communication doors 233, any communication door can be selectively activated to specify the heat exchange device to process the specified condensate water.

[0044] In the embodiment, the first water receiving pipe 11 directly communicates with the first heat exchange device 231 and the second heat exchange device 232, thus, only the first communication door 2331 and the second communication door 2332 can meet the requirements of the first water receiving pipe 11. The second water receiving pipe 12 communicates with the first heat exchange device 231 through the third communication door 2333 and communicates with the second heat exchange device 232 through the fourth communication door 2334, thus, the first communication door 2331, the third communication door 2333 and the fourth communication door 2334 are used in cooperation to meet the processing requirements of the second water receiving pipe 12.

[0045] In order to avoid the third heat exchange assembly 23 from conflicting when processing chemical condensate water and paper machine condensate water, such as mixing the chemical condensate water and the paper machine condensate water to cause water pollution, thus, the chemical condensate water and the paper machine condensate water need to be processed independently. This is also based on the different uses of the processed chemical condensate water and the paper machine condensate water. For example, the chemical condensate water is processed in the first heat exchange device 231 and the paper machine condensate water is processed in the second heat exchange device 232.

[0046] In the embodiment, the third heat exchange assembly 23 can only receive one of the chemical condensate water and the paper machine condensate water at the same time. Such arrangement ensures the independent processing of the chemical condensate water and the paper machine condensate water. Of course, in other embodiments, other processing methods can also be used as long as the two are not mixed.

[0047] Preferably, the first heat exchange assembly 21 and the second heat exchange assembly 22 are composed of a plurality of parallel heat exchangers, and the third heat exchange assembly 23 is preferably a plate heat exchanger. The heat exchanger can be selected to strengthen the heat exchange between the condensate water and the cold source to recover the heat source. Of course, in other embodiments, other heat dissipation or heat exchange products can also be selected, which are not limited.

[0048] The second water return pipe includes a first water return pipe 321 connected with the first heat exchange device 231 and the second water receiving pipe 12 respectively, and a second water return pipe 322 connected with the second heat exchange device 232, and the first water return pipe 321 and the second water return pipe 322 are respectively connected with independent water storage tanks 4 to introduce the paper machine condensate water processed by the first heat exchange device 231, the second heat exchange device 232 or the second heat exchange assembly 22 into the corresponding water storage tank 4.

[0049] Preferably, according to the different temperatures of the paper machine condensate water processing, the second water receiving pipe 12 and the third heat exchange assembly 23 are further provided with a water storage tank 5 independent of the water storage tank 4, and the water storage tank 5 and the water storage tank 4 can store water at different temperatures.

[0050] In the embodiment, the water storage tank 4 and the water storage tank 5 can be connected to the second water receiving pipe 12 separately, so that the treated paper machine condensate water can be stored directly without passing through the third heat exchange assembly 23 after the second water receiving pipe 12 communicates with the second heat exchange assembly 22.

[0051] On the contrary, the condensate water system 100 further comprises a water storage pool 6 connected to the first water return pipe 31, and the water storage pool 6 is used to store the chemical condensate water flowing out after passing through the first heat exchange assembly 21 or the third heat exchange assembly 23.

[0052] In the embodiment, the condensate water system 100 further comprises a deaerator 7 connected to the first heat exchange assembly 21. Therefore, the heat absorbed by the first heat exchange assembly 21 can be transmitted to the deaerator 7 for use. This undoubtedly greatly increases the energy utilization rate. Preferably, the deaerator 7 is also provided with multiple deaerators corresponding to multiple heat exchangers.

[0053] The water receiving pipe 1 further comprises a third water receiving pipe 13 independent of the first water receiving pipe 11 and the second water receiving pipe 12, and the third water receiving pipe 13 is used to receive desalted water, and the third water receiving pipe 13 is connected to the first heat exchange assembly 21 and can be selectively connected to the second heat exchange assembly 22.

[0054] Preferably, the condensate water system 100 further comprises a heater 8 connected between the third water receiving pipe 13 and the first heat exchange assembly 21, and the desalted water enters the deaerator 7 after passing through the second heat exchange assembly 22, the heater 8 and the first heat exchange assembly 21, or the desalted water enters the deaerator 7 after passing through the heater 8 and the first heat exchange assembly 21. That is, the first heat exchange assembly 21 can not only absorb the heat of the chemical condensate water, but also absorb the heat of the desalted water, and the desalted water will finally only flow to the deaerator 7 and be stored.

[0055] Therefore, the desalted water and the paper machine condensate water can use the second heat exchange assembly 22 together, and the heat of the second heat exchange assembly 22 will finally also flow to the deaerator 7 to supply energy to the deaerator 7.

[0056] The first water receiving pipe 11 and the first heat exchange assembly 21, and the first water receiving pipe 11 and the third heat exchange assembly 23 are further provided with a booster assembly 9, and the booster assembly 9 is used to boost the pressure of the chemical condensate water to ensure the flow of the chemical condensate water in the pipeline. Preferably, the booster assembly 9 is a booster pump.

[0057] In summary, the condensate water system 100 of the baffle plate heat exchanger of the utility model through setting first heat exchange assembly 21, second heat exchange assembly 22 and third heat exchange assembly 23 independently, make first water pipe 11 can be selected with first heat exchange assembly 21 or third heat exchange assembly 23 is connected, second water pipe 12 can be selected with second heat exchange assembly 22 and third heat exchange assembly 23 is connected, then when first water pipe 11 is connected with first heat exchange assembly 21, through first heat exchange assembly 21, heat energy is absorbed and is transmitted to deaerator 7 and is used, when second water pipe 12 is connected with second heat exchange assembly 22 or third heat exchange assembly 23, different use scenarios are adapted.

[0058] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model, and it should be pointed out that for ordinary skilled person in the art, on the premise of not departing from the technical principle of the utility model, a number of improvements and variations can be made, and these improvements and variations should be regarded as the protection scope of the utility model.

Claims

1. A condensate system with plate heat exchanger for thermal power plants, characterized in that, The application relates to a condensate water system (100), which comprises: a water receiving pipe (1) provided with at least two independent water receiving pipes, a first water receiving pipe (11) for receiving chemical condensate water and a second water receiving pipe (12) for receiving paper machine condensate water; a heat exchange module (2) comprising a first heat exchange assembly (21), a second heat exchange assembly (22) and a third heat exchange assembly (23), the first water receiving pipe (11) being selectively connected to the first heat exchange assembly (21) or the third heat exchange assembly (23), the second water receiving pipe (12) being selectively connected to the second heat exchange assembly (22) and the third heat exchange assembly (23), and the third heat exchange assembly (23) being capable of receiving only one of the chemical condensate water and the paper machine condensate water at the same time; a water return module (3) comprising a first water return pipeline (31) and a second water return pipeline, the first water return pipeline (31) being connected to the first heat exchange assembly (21) and the third heat exchange assembly (23) respectively and receiving the chemical condensate water flowing out of the first heat exchange assembly (21) or the third heat exchange assembly (23), and the second water return pipeline being connected to the second heat exchange assembly (22) or the third heat exchange assembly (23) and receiving the paper machine condensate water flowing out of the second heat exchange assembly (22) or the third heat exchange assembly (23); a deaerator (7) connected to the first heat exchange assembly (21).

2. The condensate system of claim 1, wherein, The water receiving pipe (1) further comprises a third water receiving pipe (13) independent of the first water receiving pipe (11) and the second water receiving pipe (12), the third water receiving pipe (13) being used for receiving desalted water, the third water receiving pipe (13) being connected to the first heat exchange assembly (21) and being selectively connected to the second heat exchange assembly (22).

3. The condensate system of claim 2, wherein, The condensate water system (100) further comprises a heater (8) connected to the third water receiving pipe (13) and the first heat exchange assembly (21), the desalted water entering the deaerator (7) after passing through the second heat exchange assembly (22), the heater (8) and the first heat exchange assembly (21), or the desalted water entering the deaerator (7) after passing through the heater (8) and the first heat exchange assembly (21).

4. The condensate system of claim 2, wherein, The second heat exchange assembly (22) can simultaneously receive one or more of the desalted water and the paper machine condensate water at the same time.

5. The condensate system of claim 1, wherein, The third heat exchange assembly (23) comprises a first heat exchange device (231) and a second heat exchange device (232), and a contact door (233) is arranged between the first heat exchange device (231) and the second heat exchange device (232) and can be activated, so that the first heat exchange device (231) and the second heat exchange device (232) independently or jointly receive the chemical condensate water from the first water receiving pipe (11) or the paper machine condensate water from the second water receiving pipe (12).

6. The condensate system of claim 5, wherein, The communication door (233) comprises a first communication door (2331) bidirectionally communicating the first heat exchange device (231) and the second heat exchange device (232), a second communication door (2332) unidirectionally communicating the second heat exchange device (232) and the first return water pipeline (31), a third communication door (2333) unidirectionally communicating the second water receiving pipeline (12) and the first heat exchange device (231), and a fourth communication door (2334) unidirectionally communicating the second water receiving pipeline (12) and the second heat exchange device (232), and the first communication door (2331), the second communication door (2332), the third communication door (2333) and the fourth communication door (2334) are independent of each other and can be selectively activated or closed.

7. The condensate system of claim 5, wherein, The second return water pipeline comprises two first return water pipelines (321) respectively connected with the first heat exchange device (231) and the second water receiving pipeline (12), and a second return water pipeline (322) connected with the second heat exchange device (232), and the first return water pipeline (321) and the second return water pipeline (322) are respectively connected with independent water storage tanks (4) to introduce the paper machine condensate water treated by the first heat exchange device (231), the second heat exchange device (232) or the second heat exchange assembly (22) into the corresponding water storage tank (4).

8. The condensate water system of claim 7, wherein, The second water receiving pipeline (12) and the third heat exchange assembly (23) are further provided with a water storage tank (5) independent of the water storage tank (4), and the water stored in the water storage tank (5) and the water storage tank (4) are different in temperature.

9. The condensate system of claim 1, wherein, The first water receiving pipeline (11) and the first heat exchange assembly (21) are further provided with a booster assembly (9), and the booster assembly (9) is used for boosting the chemical condensate water.

10. The condensate system of claim 1, wherein, The condensate water system (100) further comprises a water storage tank (6) connected with the first return water pipeline (31), and the water storage tank (6) is used for storing the chemical condensate water flowing out after the first heat exchange assembly (21) or the third heat exchange assembly (23).

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