whitening system

Abstract

The utility model relates to a kind of white elimination systems, including heat exchange component, expansion vessel and first temperature measuring equipment, the heat exchange component has heat release side pipeline and heat absorption side pipeline, the import of the heat release side pipeline is supplied with pressure hydrophobic to enter, the import of the heat absorption side pipeline is supplied with cooling water to enter, the import of the expansion vessel is communicated with the outlet of the heat release side pipeline, the first temperature measuring equipment is located between the outlet of the heat release side pipeline and the import of the expansion vessel to measure the temperature of the pressure hydrophobic entering the expansion vessel.The utility model discloses white elimination system, by heat exchange component to the pressure hydrophobic entering expansion vessel is carried out heat exchange, recovers the heat of a part of pressure hydrophobic, reduces the temperature of pressure hydrophobic, makes the temperature of pressure hydrophobic to local atmospheric pressure corresponding saturated temperature, so that expansion vessel operates without steam generation.

Description

Technical Field

[0001] This utility model relates to the field of whitening technology, and specifically to a whitening system. Background Technology

[0002] Steam boilers periodically discharge blowdown water into a blowdown expansion tank, and condensate from steam users enters a drainage expansion tank. The expansion tank is then emptied directly. Both the blowdown water and condensate are pressurized, high-temperature water. Within the expansion tank, the pressure is released, and the water is converted into steam and saturated water. The saturated water is piped away, while the steam released into the atmosphere produces white mist. This white mist not only adversely affects the surrounding environment and ecosystem but also wastes heat and water. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of this utility model propose a whitening elimination system that performs heat exchange on the pressurized condensate entering the expansion container, recovers a portion of the heat from the pressurized condensate, and lowers the temperature of the pressurized condensate to the saturation temperature corresponding to the local atmospheric pressure, thereby preventing steam generation during expansion container operation.

[0005] The whitening system according to an embodiment of the present invention includes a heat exchange component, an expansion container, and a first temperature measuring device. The heat exchange component has a heat-releasing side pipe and a heat-absorbing side pipe. The inlet of the heat-releasing side pipe is supplied with pressurized condensate, and the inlet of the heat-absorbing side pipe is supplied with cooling water. The inlet of the expansion container is connected to the outlet of the heat-releasing side pipe. The first temperature measuring device is disposed between the outlet of the heat-releasing side pipe and the inlet of the expansion container to measure the temperature of the pressurized condensate entering the expansion container.

[0006] The whitening system of this utility model uses a heat exchange component to exchange heat with the pressurized condensate entering the expansion container, recovering a portion of the heat from the pressurized condensate and reducing its temperature to the saturation temperature corresponding to the local atmospheric pressure, thereby preventing steam generation during expansion container operation.

[0007] In some embodiments, the heat exchange assembly includes a first heat exchanger and a regulating valve. The first heat exchanger has a first heat-releasing side and a first heat-absorbing side. The inlet of the first heat-releasing side is supplied with pressurized condensate, and the outlet of the first heat-releasing side forms the outlet of the heat-releasing side pipeline. The inlet of the regulating valve is used to supply cooling water, and the outlet of the regulating valve is connected to the inlet of the first heat-absorbing side.

[0008] In some embodiments, the heat exchange assembly further includes a second heat exchanger having a second heat-releasing side and a second heat-absorbing side, the inlet of the second heat-releasing side forming the inlet of the heat-releasing side pipeline, the outlet of the second heat-releasing side communicating with the inlet of the first heat-releasing side, and the inlet of the second heat-absorbing side supplying cooling water.

[0009] In some embodiments, the whitening system further includes a second temperature measuring device disposed between the second heat-releasing side outlet and the first heat-releasing side inlet.

[0010] In some embodiments, the whitening system further includes a controller connected to the first temperature measuring device, the second temperature measuring device, and the regulating valve.

[0011] In some embodiments, the inlet of the second heat-absorbing side is provided with a water inlet pipe for supplying cooling water. The whitening system further includes a bypass pipe and a bypass valve, wherein the bypass pipe is provided on the water inlet pipe and the bypass valve is provided on the bypass pipe.

[0012] In some embodiments, the cooling water entering the second heat-absorbing side is the water to be heated in the water-using system.

[0013] In some embodiments, both the first heat exchanger and the second heat exchanger are water-to-water heat exchangers.

[0014] In some embodiments, the cooling water entering the first heat-absorbing side is cooling water from a circulating cooling system. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the whitening system according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of a whitening system according to another embodiment of the present invention.

[0017] Figure label:

[0018] Whitening system 100, heat exchange component 1, first heat exchanger 11, regulating valve 12, second heat exchanger 13, expansion tank 2, first temperature measuring device 3, second temperature measuring device 4, controller 5, inlet pipe 6, bypass pipe 7, bypass valve 8. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] The following is a reference to the appendix. Figure 1 and Figure 2 The whitening system 100 of this utility model embodiment is described in detail below.

[0021] The whitening system 100 of this utility model embodiment includes a heat exchange component 1, an expansion container 2, and a first temperature measuring device 3. The heat exchange component 1 has a heat-releasing side pipe and a heat-absorbing side pipe. The inlet of the heat-releasing side pipe is supplied with pressurized condensate, and the inlet of the heat-absorbing side pipe is supplied with cooling water. The inlet of the expansion container 2 is connected to the outlet of the heat-releasing side pipe. The first temperature measuring device 3 is located between the outlet of the heat-releasing side pipe and the inlet of the expansion container 2 to measure the temperature of the pressurized condensate entering the expansion container 2.

[0022] The pressurized condensate is high-pressure, high-temperature water discharged periodically from the steam boiler, or pressurized high-temperature condensate that condenses into water due to heat dissipation and is discharged through the steam trap when high-temperature, high-pressure steam flows in the pipeline. The pressurized condensate enters the heat-exhausting side of heat exchanger 1 through the inlet of the heat-exhausting side pipeline, while cooling water enters the heat-absorbing side of heat exchanger 1 through the inlet of the heat-absorbing side pipeline. Within heat exchanger 1, the cooling water and pressurized condensate exchange heat, increasing the temperature of the cooling water and decreasing the temperature of the pressurized condensate. The cooling water then exits from the outlet of the heat-absorbing side pipeline, and the pressurized condensate exits from the outlet of the heat-exhausting side pipeline. The temperature of the cooled pressurized condensate is detected by the first temperature measuring device 3, and then the pressurized condensate enters the expansion tank 2. When the temperature measured by the first temperature measuring device 3 is lower than the saturation temperature corresponding to the local atmospheric pressure, no steam will be generated during the pressure condensate drainage in the expansion tank 2.

[0023] In this context, "local" refers to the location where the whitening system 100 of this embodiment is used, and "saturation temperature" refers to the temperature at which the liquid and vapor are in dynamic equilibrium. For example, if the atmospheric pressure at the location of use is 101.325 kPa (standard atmospheric pressure), then the corresponding saturation temperature is 100°C.

[0024] The whitening system 100 of this utility model uses heat exchange component 1 to exchange heat with the pressurized condensate entering the expansion container 2, recovers a portion of the heat from the pressurized condensate, and lowers the temperature of the pressurized condensate to the saturation temperature corresponding to the local atmospheric pressure, thereby preventing steam generation during the operation of the expansion container 2.

[0025] Furthermore, the heat exchange assembly 1 includes a first heat exchanger 11 and a regulating valve 12. The first heat exchanger 11 has a first heat-releasing side and a first heat-absorbing side. The inlet of the first heat-releasing side is supplied with pressurized condensate, and the outlet of the first heat-releasing side forms the outlet of the heat-releasing side pipeline. The first heat-releasing side of the first heat exchanger 11 forms part of the heat-releasing pipeline. The inlet of the regulating valve 12 is used to supply cooling water, and the outlet of the regulating valve 12 is connected to the inlet of the first heat-absorbing side. The first heat-absorbing side of the first heat exchanger 11 forms part of the heat-absorbing pipeline.

[0026] The regulating valve 12 regulates the flow rate of cooling water entering the first heat absorption side, thereby regulating the heat exchange with the pressurized condensate, thus ensuring that the temperature of the pressurized condensate is lower than the saturation temperature after heat exchange through the first heat exchanger 11, and thus ensuring that the pressurized condensate does not generate steam in the expansion vessel 2.

[0027] Specifically, the cooling water entering the first heat-absorbing side is the cooling water in the circulating cooling system, and the cooling water discharged from the first heat-absorbing side flows back into the circulating cooling system.

[0028] In some embodiments, the heat exchange assembly 1 further includes a second heat exchanger 13, which has a second heat-releasing side and a second heat-absorbing side. The inlet of the second heat-releasing side forms the inlet of a heat-releasing side pipeline, and the outlet of the second heat-releasing side communicates with the inlet of the first heat-releasing side. The second heat-releasing side of the second heat exchanger 13 forms part of the heat-releasing side pipeline. Cooling water enters through the inlet of the second heat-absorbing side, and the second heat-absorbing side of the second heat exchanger 13 forms part of the heat-absorbing pipeline. When cooling water enters the second heat-absorbing side, pressurized condensate enters the second heat-releasing side. The pressurized condensate and cooling water exchange heat within the second heat exchanger 13, thereby reducing the temperature of the pressurized condensate.

[0029] The whitening system 100 of this utility model embodiment uses two heat exchangers (first heat exchanger 11 and second heat exchanger 13) to participate in the heat exchange of the pressurized condensate. On the one hand, when the two heat exchangers work simultaneously, they can perform two-stage heat exchange on the pressurized condensate, improve the cooling effect of the pressurized condensate, and further ensure that the temperature of the pressurized condensate entering the expansion vessel 2 is lower than the saturation temperature, thereby further ensuring that the expansion vessel 2 does not generate steam. On the other hand, the two heat exchangers can work in turn, so that when the cooling water on the heat absorption side of one of them is affected by other factors and cannot guarantee the intake of cooling water, or when the heat absorption side needs maintenance, the other can work normally to exchange heat between the pressurized condensate and the cooling water, ensuring that the temperature of the pressurized condensate is effectively reduced, thereby ensuring that the expansion vessel 2 does not generate steam.

[0030] The whitening system 100 of this embodiment further includes a second temperature measuring device 4, which is located between the second heat-releasing side outlet and the first heat-releasing side inlet. The second temperature measuring device 4 measures the temperature of the pressurized condensate on the second heat-releasing side after passing through the second heat exchanger 13 (the temperature of the first heat-releasing side entering the first heat exchanger 11). Combined with the data obtained by the first temperature measuring device 3, it is convenient to observe and compare the temperature of the pressurized condensate discharged from the heat-releasing side of the two heat exchangers, thereby facilitating the adjustment of the flow rate of the cooling water on the first heat-absorbing side of the first heat exchanger 11. This ensures the heat exchange effect of the pressurized condensate and the cooling water, the cooling effect of the pressurized condensate, and the temperature of the pressurized condensate entering the expansion vessel 2, thereby further ensuring that the expansion vessel 2 does not generate steam.

[0031] Specifically, after the pressurized condensate passes through the second heat exchanger 13, if the second temperature measuring device 4 detects that the temperature is lower than the saturation temperature corresponding to the local atmospheric pressure, the regulating valve 12 can be closed to stop the water supply to the first heat-absorbing side of the first heat exchanger 11. Then, the pressurized condensate will no longer exchange heat or cool down as it flows through the first heat exchanger 11. When the second temperature measuring device 4 detects that the temperature is higher than the saturation temperature corresponding to the local atmospheric pressure, the regulating valve 12 is opened and its opening degree is adjusted to increase the water flow rate to the first heat-absorbing side of the first heat exchanger 11, ensuring that the temperature of the pressurized condensate after passing through the first heat exchanger 11 is reduced below the saturation temperature.

[0032] Specifically, both the first temperature measuring device 3 and the second temperature measuring device 4 are temperature sensors.

[0033] Specifically, the cooling water entering the second heat-absorbing side is the water to be heated in the water system, i.e., process water, such as deaerator makeup water or turbine condensate. The heated process water discharged from the second heat-absorbing side enters the corresponding water system. The second heat exchanger 13 uses pressurized condensate to exchange heat with the process water to be heated, thereby recovering a portion of the heat from the pressurized condensate and reducing the energy consumed in the water system to heat the process water.

[0034] In some embodiments, such as Figure 2 As shown, the inlet of the second heat-absorbing side is provided with a water inlet pipe 6, which is used to supply cooling water. That is, the water inlet pipe 6 is used to connect with the water system to supply the water to be heated (process water) to the second heat-absorbing side. The whitening system 100 further includes a bypass pipe 7 and a bypass valve 8. The bypass pipe 7 is provided on the water inlet pipe 6, and the bypass valve 8 is provided on the bypass pipe. The flow rate of the process water is controlled and regulated by its water system. In the absence of process water, that is, when no cooling water enters the water inlet pipe, the pressure of the water inlet pipe and the second heat-absorbing side is regulated by the bypass valve.

[0035] In some embodiments, the whitening system 100 further includes a controller 5, which is connected to a first temperature measuring device 3, a second temperature measuring device 4, and a regulating valve 12. The controller 5 acquires temperature data from the first temperature measuring device 3 and the second temperature measuring device 4, and controls the opening degree of the regulating valve 12, controlling the opening, closing, and flow regulation of the regulating valve 12, thereby improving the automation level of the whitening system 100 of this embodiment.

[0036] Specifically, both the first heat exchanger 11 and the second heat exchanger 13 are water-to-water heat exchangers. Water-to-water heat exchangers are small in size and occupy less space. Compared with the method in related technologies that uses a steam-water heat exchanger to exchange heat with the steam generated in the expansion vessel 2, the whitening elimination system 100 of this embodiment occupies less space and can ensure that no steam is generated (i.e., the expansion vessel 2 does not discharge steam). Compared with the method in related technologies that uses water spray to cool the steam generated in the expansion vessel, the whitening elimination system 100 of this embodiment has the advantages of water and energy saving.

[0037] See appendix Figure 1 Taking saturated condensate with a pressure of 5 MPa, a temperature of 265℃, and a flow rate of 6 t / h as an example, the saturated condensate passes sequentially through the second heat exchanger 13 (second heat release side), the second temperature measuring device 4, the first heat exchanger 11 (first heat release side), the first temperature measuring device 3, and finally enters the condensate expansion tank 2.

[0038] Under normal operating conditions, the cooling water entering the second heat-absorbing side of the second heat exchanger 13 is 40℃ condensate from the turbine condenser, with a normal flow rate of 60 t / h. After heat exchange in the second heat exchanger 13, the temperature is 57.5℃. The temperature of this saturated condensate (pressurized drain) at the outlet of the second heat-releasing side of the second heat exchanger 13 is 90℃. Since 90℃ is below the saturation temperature, regulating valve 12 is closed, disconnecting the circulating cooling water from entering the first heat exchanger 11, resulting in zero circulating cooling water flow. In the absence of turbine condenser condensate, the inflow to the second heat-absorbing side of the second heat exchanger 13 is 0. Regulating valve 12 is opened, allowing circulating cooling water to enter the first heat-absorbing side of the first heat exchanger 11, resulting in a circulating cooling water flow rate of 100 t / h. The temperature of the cooling water entering and exiting the first heat exchanger 11 is 32℃ / 42℃, and the temperature of this saturated condensate (pressurized drain) at the outlet of the second heat-releasing side of the second heat exchanger 13 is 90℃.

[0039] Pressurized condensate below the saturation temperature enters the expansion container 2, expands to produce low-pressure condensate, and does not generate steam. It should be noted that, to ensure the safety of the expansion container 2, the pipeline connecting the expansion container 2 to the air is still retained.

[0040] Therefore, the whitening system 100 of this utility model embodiment recovers the heat of the pressurized hydrophobic layer, avoids energy waste, and the expansion container 2 does not generate steam, thus occupying little space and saving water and energy.

[0041] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A whitening system (100), characterized in that, include: A heat exchange assembly (1) has a heat-releasing side pipe and a heat-absorbing side pipe. The inlet of the heat-releasing side pipe is supplied with pressurized condensate, and the inlet of the heat-absorbing side pipe is supplied with cooling water. Expansion container (2), the inlet of which is connected to the outlet of the heat-dissipating side pipeline; and A first temperature measuring device (3) is provided between the outlet of the heat-releasing side pipeline and the inlet of the expansion container (2) to measure the temperature of the pressurized condensate entering the expansion container (2).

2. The whitening system (100) according to claim 1, characterized in that, The heat exchange assembly (1) includes a first heat exchanger (11) and a regulating valve (12). The first heat exchanger (11) has a first heat-releasing side and a first heat-absorbing side. The inlet of the first heat-releasing side is supplied with pressurized condensate, and the outlet of the first heat-releasing side forms the outlet of the heat-releasing side pipeline. The inlet of the regulating valve (12) is used to supply cooling water, and the outlet of the regulating valve (12) is connected to the inlet of the first heat-absorbing side.

3. The whitening system (100) according to claim 2, characterized in that, The heat exchange assembly (1) further includes a second heat exchanger (13), which has a second heat-releasing side and a second heat-absorbing side. The inlet of the second heat-releasing side forms the inlet of the heat-releasing side pipeline, and the outlet of the second heat-releasing side is connected to the inlet of the first heat-releasing side. The inlet of the second heat-absorbing side is supplied with cooling water.

4. The whitening system (100) according to claim 3, characterized in that, It further includes a second temperature measuring device (4), which is located between the second heat-releasing side outlet and the first heat-releasing side inlet.

5. The whitening system (100) according to claim 4, characterized in that, It further includes a controller (5) that is connected to the first temperature measuring device (3), the second temperature measuring device (4), and the regulating valve (12).

6. The whitening system (100) according to claim 5, characterized in that, The inlet of the second heat absorption side is provided with a water inlet pipe for supplying cooling water. The whitening system (100) further includes a bypass pipe and a bypass valve. The bypass pipe is provided on the water inlet pipe and the bypass valve is provided on the bypass pipe.

7. The whitening system (100) according to claim 3, characterized in that, The cooling water entering the second heat absorption side is the water to be heated in the water system.

8. The whitening system (100) according to claim 3, characterized in that, Both the first heat exchanger (11) and the second heat exchanger (13) are water-to-water heat exchangers.

9. The whitening system (100) according to claim 2, characterized in that, The cooling water entering the first heat absorption side is the cooling water from the circulating cooling system.

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