Gas condensation composite cooling system

Abstract

The utility model relates to the technical field of cooling equipment, in particular to a gas condensation composite cooling system. The gas condensation composite cooling system comprises a first main pipe, a second main pipe, a cooling device, a three-medium heat exchange device, a fan and a condensing device. According to the gas condensation composite cooling system, composite cooling of air cooling and circulating media is achieved according to a corresponding mode, the cooling requirement of high-temperature weather in summer can be met, and the area of an air cooling heat exchanger can be reduced; moreover, due to the arrangement of the liquid inlet header pipe and the liquid outlet header pipe, the communication of the second fluid channel and the fourth fluid channel can be realized, so that an air flow channel of the three-medium heat exchange device replaces a cooling device to be used for cooling a circulating medium, and the cooled gas is only cooled by the circulating cooling medium in the condensing device; water consumption of a cooling device in winter is saved, and meanwhile the risk that the gas is frozen after being condensed when the three-medium heat exchange device directly cools the gas is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling equipment, in particular to a gas condensation composite cooling system. Background Art

[0002] There is often a need for gas condensation cooling in industrial production processes. According to different cooling media, cooling technology can be divided into air cooling technology and water cooling technology. Water cooling technology is widely used due to its high cooling efficiency. However, due to its large water consumption, it is difficult to be widely used in arid and water-scarce areas. Air cooling technology, especially direct air cooling technology, is increasingly widely used due to its low water consumption. Direct air cooling technology uses equipment such as air cooling islands to achieve gas cooling. The cooling efficiency of direct air cooling is greatly affected by meteorological conditions: when the temperature is high in summer, the cooling efficiency of the air cooling island is low, and the design area of ​​the air cooling island is often large; when the temperature is low in winter, the air cooling island may be overcooled after gas condensation, and there is a risk of freezing, so some anti-freezing measures need to be taken. Especially in the process of thermal power generation, the excessively high exhaust steam temperature in summer will seriously affect the power generation efficiency and the safe operation of the system; there is a greater risk of freezing when the temperature is below freezing in winter. In order to maintain the normal operation of the system, a water condenser is often required as a peak cooling device in summer, and some anti-freezing measures need to be taken when the temperature is low in winter. At present, the antifreeze methods of air-cooling cooling systems are mainly divided into two categories: one is to use the method of adjusting air cooling, and common antifreeze equipment includes windshield shutters, etc. This method is low-cost and simple to implement, but the antifreeze performance is poor; the other is to use the heating method, using steam turbine extraction to heat the exhaust steam or air-cooling island, etc. This method is costly and causes energy waste. It can be seen that the direct air cooling technology in the prior art has the problem that the cooling efficiency is greatly affected by meteorological conditions, the cooling efficiency is low in summer, the equipment occupies a large area, and there is a freezing problem in winter. Utility Model Content

[0003] The utility model provides a gas condensation composite cooling system to solve the problems of direct air cooling technology in the prior art, namely, the cooling efficiency is greatly affected by meteorological conditions, the cooling efficiency is low in summer, the equipment occupies a large area, and there is freezing in winter.

[0004] The utility model provides a gas condensation composite cooling system, comprising:

[0005] First main pipe;

[0006] Second trunk;

[0007] Cooling device;

[0008] A three-medium heat exchange device, comprising: a first fluid channel, a second fluid channel and an air flow channel for mutual heat transfer, wherein the first fluid channel is connected between a first main pipe and a second main pipe, and the second fluid channel is connected to the cooling device through a first fluid circulation pipeline;

[0009] A fan, the fan being arranged in the air flow channel of the three-medium heat exchange device;

[0010] The condensing device comprises: a third fluid channel and a fourth fluid channel for mutual heat transfer, the third fluid channel is connected between a first main pipe and a second main pipe, the fourth fluid channel is connected to the cooling device through a second fluid circulation pipeline, and the first fluid circulation pipeline and the second fluid circulation pipeline are respectively connected in parallel to the liquid inlet end and the liquid outlet end of the cooling device through a liquid inlet main pipe and a liquid outlet main pipe, and the liquid outlet main pipe is connected to the cooling device.

[0011] The gas condensation composite cooling system provided by the utility model also includes:

[0012] a first valve body, the first valve body being disposed on a connecting pipe of the first fluid channel connecting the first main pipe and the second main pipe;

[0013] a second valve body, the second valve body being arranged on a connecting pipe of the third fluid channel connecting the first main pipe and the second main pipe;

[0014] a third valve body, the third valve body being arranged on the liquid inlet main pipe or the liquid outlet main pipe;

[0015] A fourth valve body is provided on a first fluid circulation pipeline connecting the cooling device and the second fluid channel.

[0016] The gas condensation composite cooling system provided by the utility model also includes:

[0017] a first pumping device, the first pumping device being arranged on the liquid inlet main pipe;

[0018] A second pumping device, wherein the second pumping device is arranged on the second fluid circulation pipeline.

[0019] The gas condensation composite cooling system provided by the utility model further includes: a fifth valve body, which is arranged on the second fluid circulation pipeline and is connected in parallel with the second pumping device.

[0020] The gas condensation composite cooling system provided by the utility model also includes:

[0021] a third pumping device, the third pumping device being arranged on the second trunk pipe;

[0022] A steam power device, wherein the gas outlet of the steam power device is connected to the first trunk pipe;

[0023] A heating device, wherein the liquid inlet of the heating device is connected to the second main pipe, and the exhaust port of the heating device is connected to the air inlet of the steam power device through a gas pipeline.

[0024] According to the gas condensation composite cooling system provided by the utility model, the cooling device is one of a direct cooling device and an indirect evaporative cooling device or a combination of the two.

[0025] The utility model provides a gas condensation composite cooling system. The composite cooling system comprises: a first trunk, a second trunk, a cooling device, a cooling demand subsystem, a three-medium heat exchange device, a fan and a condensing device; the three-medium heat exchange device comprises: a first fluid channel, a second fluid channel and an airflow channel for mutual heat transfer, the first fluid channel is connected between the first trunk and the second trunk, and the second fluid channel is connected to the cooling device through a first fluid circulation pipeline; the fan is arranged in the airflow channel of the three-medium heat exchange device; the condensing device comprises: a third fluid channel and a fourth fluid channel for mutual heat transfer, the third fluid channel is connected between the first trunk and the second trunk, and the fourth fluid channel is connected to the cooling device through a second fluid circulation pipeline, and the first fluid circulation pipeline and the second fluid circulation pipeline are respectively connected in parallel to the liquid inlet end and the liquid outlet end of the cooling device through a liquid inlet main pipe and a liquid outlet main pipe, and the liquid outlet main pipe is connected to the cooling device. The utility model provides a composite cooling system. According to the corresponding mode, the cooled gas can be adjusted from the first main pipe to enter the first fluid channel and / or the third fluid channel for cooling and return through the second main pipe. The circulating cooling medium can be adjusted to enter the second fluid channel and / or the fourth fluid channel to cool the gas to be cooled in the first fluid channel and the third fluid channel respectively and circulate to the cooling device. The gas to be cooled in the second fluid channel can also be cooled by air in the three-medium heat exchange device, thereby realizing the composite cooling of air cooling and circulating medium, which can not only ensure the cooling requirements of high temperature weather in summer, but also reduce the area of ​​the air-cooled heat exchanger; and, due to the arrangement of the cooling circulating medium inlet main pipe and the liquid outlet main pipe, the second fluid channel and the fourth fluid channel can also be connected, thereby realizing that the air flow channel of the three-medium heat exchange device replaces the cooling device for cooling the circulating medium, and the cooled gas is cooled by the circulating cooling medium only in the condensing device. While saving the water consumption of the cooling device in winter, it also avoids the risk of freezing of the gas after condensation when the three-medium heat exchange device directly cools the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of a gas condensation composite cooling system provided in one embodiment of the utility model.

[0028] Figure 2 It is a schematic structural diagram of a gas condensation compound cooling system provided in one embodiment of the present utility model in a first mode.

[0029] Figure 3 It is a schematic structural diagram of a gas condensation compound cooling system provided in one embodiment of the present utility model in the second mode.

[0030] Figure 4 It is a schematic structural diagram of a gas condensation composite cooling system in a third mode provided in one embodiment of the present utility model.

[0031] Figure 5 It is a schematic structural diagram of a gas condensation composite cooling system in a fourth mode provided in one of the embodiments of the present utility model.

[0032] Figure 6 It is a schematic structural diagram of a gas condensation compound cooling system in a fifth mode provided in one embodiment of the present utility model.

[0033] Reference numerals:

[0034] 1: three-medium heat exchange device; 2: fan; 3: condensing device; 4: cooling device; 5: steam power device; 6: heating device; 7: first valve body; 8: second valve body; 9: third valve body; 10: fourth valve body; 11: third pumping device; 12: first pumping device; 13: second pumping device; 14: fifth valve body. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0038] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0040] Combine the following Figures 1 to 6The utility model describes a gas condensation composite cooling system. The gas condensation composite cooling system (hereinafter referred to as "composite cooling system") comprises: a first trunk pipe, a second trunk pipe, a cooling device 4, a three-medium heat exchange device 1, a fan 2 and a condensing device 3. Figures 1 to 6 The solid line indicates that the pipeline is connected; the dotted line indicates that the pipeline is disconnected.

[0041] like Figure 1 As shown, the three-medium heat exchange device 1 includes: a first fluid channel, a second fluid channel and an air flow channel for mutual heat transfer, the first fluid channel is connected between the first trunk and the second trunk, and the second fluid channel is connected to the cooling device 4 through the first fluid circulation pipeline; the fan 2 is arranged in the air flow channel; the condensing device 3 includes: a third fluid channel and a fourth fluid channel for mutual heat transfer, the third fluid channel is connected between the first trunk and the second trunk, and the fourth fluid channel is connected to the cooling device 4 through the second fluid circulation pipeline, and the first fluid circulation pipeline and the second fluid circulation pipeline are respectively connected in parallel to the liquid inlet end and the liquid outlet end of the cooling device 4 through the liquid inlet main pipe and the liquid outlet main pipe, and the liquid outlet main pipe and the liquid inlet main pipe are both connected to the cooling device 4.

[0042] Specifically, the exhaust device of the first main pipe is connected to receive the cooled medium. Specifically, the first main pipe can be connected to the exhaust port of the steam turbine; the second main pipe is used to connect to the liquid-using equipment to export the liquefied liquid (that is, water). The second main pipe can be connected to the liquid inlet of the boiler. The boiler heats the water to form steam, which enters the steam turbine to do work and then discharges the exhausted steam. Of course, the composite cooling system of the utility model can also be used for steam cooling.

[0043] The exhaust steam generated by the steam turbine is input through the first main pipe, and can enter the first fluid channel and / or the third fluid channel according to the use mode. After being cooled in the first fluid channel and / or the third fluid channel to form condensed water, it is output to the boiler through the second main pipe. The medium in the first fluid channel can exchange heat with the medium in the second fluid channel and / or the air flow channel according to the corresponding mode; the medium in the fourth fluid channel can exchange heat with the medium in the third fluid channel according to the corresponding mode, thereby realizing a variety of composite cooling modes. Moreover, due to the setting of the liquid inlet main pipe and the liquid outlet main pipe, the second fluid channel can also be connected with the fourth fluid channel. The cooling device 4 is not used for cooling. Only air flow cooling is used in combination with the heat exchange of the condensing device 3 to cool the exhaust steam or steam. When used in winter, the risk of equipment freezing is avoided.

[0044] In this embodiment, by providing a fan 2 in the air flow channel, the air flow velocity is increased, thereby improving the heat exchange efficiency between the air in the air flow channel and the first fluid channel and / or the second fluid channel. Specifically, the fan 2 may be an air inlet fan 2 provided at the air inlet, an exhaust fan 2 provided at the air outlet, or a combination of the air inlet fan 2 and the exhaust fan 2.

[0045] The utility model provides a gas condensation composite cooling system, which comprises: a first main pipe, a second main pipe, a cooling device, a cooling demand subsystem, a three-medium heat exchange device, a fan and a condensing device; the three-medium heat exchange device comprises: a first fluid channel, a second fluid channel and an airflow channel for mutual heat transfer, the first fluid channel is connected between the first main pipe and the second main pipe, and the second fluid channel is connected to the cooling device through a first fluid circulation pipeline; the fan is arranged in the airflow channel; the condensing device comprises: a third fluid channel and a fourth fluid channel for mutual heat transfer, the third fluid channel is connected between the first main pipe and the second main pipe, and the fourth fluid channel is connected to the cooling device through a second fluid circulation pipeline, and the first fluid circulation pipeline and the second fluid circulation pipeline are respectively connected in parallel to the liquid inlet end and the liquid outlet end of the cooling device through a liquid inlet main pipe and a liquid outlet main pipe, and the liquid outlet main pipe is connected to the cooling device. The utility model provides a composite cooling system. According to the corresponding mode, the cooled medium can be controlled to enter the first fluid channel and / or the third fluid channel for cooling, and the circulating medium can be controlled to enter the second fluid channel and / or the fourth fluid channel for circulation, thereby realizing a variety of composite cooling modes with high cooling efficiency to meet the cooling needs in summer. Moreover, due to the arrangement of the liquid inlet main pipe and the liquid outlet main pipe, the second fluid channel and the fourth fluid channel can be connected. The cooling device 4 is not used for cooling. Only airflow cooling is used in combination with the heat exchange of the condensing device 3 to cool the exhaust steam or steam. When used in winter, the risk of equipment freezing is avoided.

[0046] In one embodiment of the utility model, the composite cooling system further includes: a first valve body 7, the first valve body 7 is arranged on a connecting pipe of a first fluid channel connecting the first main pipe and the second main pipe. In this embodiment, the first valve body 7 is arranged on a connecting pipe of a first fluid channel connecting the first main pipe and the second main pipe, so as to control the connection and disconnection relationship of the first fluid channel. When the first valve body 7 is opened, the first main pipe passes exhaust steam or steam into the first fluid channel. When the first valve body 7 is disconnected, the first main pipe does not pass exhaust steam or steam into the first fluid channel.

[0047] In one embodiment of the utility model, the composite cooling system further includes: a second valve body 8, which is arranged on the connecting pipe of the third fluid channel connecting the first trunk and the second trunk. In this embodiment, the second valve body 8 is arranged on the connecting pipe of the third fluid channel connecting the first trunk and the second trunk, so as to control the connection and disconnection relationship of the third fluid channel. When the second valve body 8 is opened, the first trunk introduces exhaust steam or steam into the third fluid channel. When the second valve body 8 is disconnected, the first trunk does not introduce exhaust steam or steam into the third fluid channel. It should be understood that since the first fluid channel and the third fluid channel are connected in parallel to the first trunk, and the exhaust steam or steam is controlled by the first valve body 7 and the second valve body 8 respectively, the exhaust steam or steam of the first fluid channel and the exhaust steam of the third fluid channel do not affect each other.

[0048] In one embodiment of the utility model, the composite cooling system further includes: a third valve body 9, which is arranged on the liquid inlet main pipe or the liquid outlet main pipe. In this embodiment, by arranging the third valve body 9 on the liquid inlet main pipe or the liquid outlet main pipe, the inlet and outlet of the circulating medium in the cooling device 4 is controlled. Specifically, when the third valve body 9 is opened, the circulating medium cooled by the cooling device 4 circulates and enters the second fluid channel and the fourth fluid channel respectively. When the third valve body 9 is disconnected, the circulating medium cannot enter the second fluid channel and the fourth fluid channel. At this time, the cooling device 4 may not work.

[0049] In one embodiment of the utility model, the composite cooling system further includes: a fourth valve body 10, which is arranged on the first fluid circulation pipeline connecting the cooling device 4 and the second fluid channel. In this embodiment, by arranging the fourth valve body 10 on the first fluid circulation pipeline, the discharge of the cooling circulation medium in the cooling device 4 into the second fluid channel is controlled. Specifically, when the third valve body 9 and the fourth valve body 10 are both opened, the circulating medium cooled by the cooling device 4 is discharged and enters the second fluid channel and the fourth fluid channel respectively. When the third valve body 9 is opened and the fourth valve body 10 is disconnected, the circulating medium only enters the fourth fluid channel. When the third valve body 9 is disconnected and the fourth valve body 10 is opened, the circulating medium circulates in the second fluid channel and the fourth fluid channel. At this time, the circulating medium does not pass through the cooling device 4, and the cooling device 4 does not work.

[0050] In one embodiment of the utility model, the composite cooling system further comprises: a third pumping device 11, and the third pumping device 11 is arranged on the second main pipe. In this embodiment, by arranging the third pumping device 11 on the second main pipe, a driving force for directional movement is provided for the output condensed water, so that the condensed water is pumped into the boiler.

[0051] In one embodiment of the utility model, the composite cooling system further includes: a first pumping device 12 and a second pumping device 13. The first pumping device 12 is arranged on the liquid inlet main pipe; the second pumping device 13 is arranged on the second fluid circulation pipeline. In this embodiment, by arranging the first pumping device 12 on the liquid inlet main pipe, a driving force for directional movement is provided for the circulating medium, so that it is pumped into the cooling device 4; by arranging the second pumping device 13 on the second fluid circulation pipeline, when the second fluid channel and the fourth fluid channel are connected, the second pumping device 13 provides a driving force for directional movement for the circulating medium.

[0052] In one embodiment of the present utility model, the fifth valve body 14 is arranged on the second fluid circulation pipeline and is connected in parallel with the second pumping device 13. The circulating cooling medium can control the flow state of the cooling circulating medium passing through the pipeline by opening and closing the fifth valve body 14.

[0053] Preferably, the third pumping device 11, the first pumping device 12 and the second pumping device 13 may adopt water pumps of different forms.

[0054] In one embodiment of the present invention, the cooling device 4 is one or a combination of a direct cooling device and an indirect evaporative cooling device 4. In this embodiment, the cooling device 4 can be an open cooling tower or a closed cooling tower, and can also be other direct cooling devices, indirect evaporative cooling devices, or a combination of the two.

[0055] In one of the embodiments of the present utility model, the composite cooling system includes: a steam power device 5 and a heating device 6. Among them, the air outlet of the steam power device 5 is connected to the first main pipe; the liquid inlet of the heating device 6 is connected to the second main pipe, and the exhaust port of the heating device 6 is connected to the air inlet of the steam power device 5 through a gas pipeline. It should be understood that, according to the usage scenario, the steam power device 5 can adopt a steam turbine, etc., and use steam to do work; the heating device 6 can adopt a boiler to heat water to form steam, which is passed into the steam turbine for use. The composite cooling system in this embodiment can be applied to different industrial cooling scenarios. In one of the more important scenarios, such as the power plant system scenario using steam turbines and boilers, the gas condensation composite cooling system in this embodiment can be applied.

[0056] Figures 2 to 6 As shown, the utility model also provides a working method of a gas condensation composite cooling system. The working method includes five different modes, and the switching of different modes is realized according to different connection and disconnection states. The working methods of each mode are as follows.

[0057] In the first mode, if Figure 2As shown, the first fluid channel and the third fluid channel are both in a connected state between the first main pipe and the second main pipe, the fourth fluid channel and the cooling device 4 are in a circulating connected state, and the second fluid channel and the cooling device 4 are in a disconnected state. The cooled medium leaves the steam power device 5 and enters the first fluid channel and the third fluid channel respectively through the first main pipe, the cooling device 4 is started, and the fan 2 in the air flow channel of the three-medium heat exchange device runs and blows air into the air flow channel of the three-medium heat exchange device. The medium in the air flow channel of the three-medium heat exchange device cools the cooled medium in the first fluid channel. The cooling device 4 cools the cooled medium in the third fluid channel through the medium in the fourth fluid channel. After cooling, the cooled medium forms condensed water and returns to the heating device 6 through the second main pipe. The medium in the fourth fluid channel is circulated and cooled through the cooling device 4. This mode is a composite cooling mode. In this mode, the first valve body 7, the second valve body 8 and the third valve body 9 are all opened, the fourth valve body 10 is disconnected, and driven by the third pumping device 11, the first pumping device 12 and the second pumping device 13, each part of the medium moves in a directional manner. The exhaust steam discharged from the steam turbine is cooled through the first fluid channel and the third fluid channel respectively to form condensed water which flows back to the boiler for use; in the three-medium heat exchange device 1, the fan 2 is started to cool the exhaust steam; in the condensing device 3, the cooling device 4 is started to cool the exhaust steam through the circulating medium cooled by the cooling device 4.

[0058] In the second mode, if Figure 3 As shown, the first fluid channel is in a connected state between the first main pipe and the second main pipe, the second fluid channel and the cooling device 4 are in a circulating connected state, the third fluid channel is in a disconnected state between the first main pipe and the second main pipe, and the fourth fluid channel and the cooling device 4 are in a disconnected state. The cooling device 4 is started, and the fan 2 in the air flow channel of the three-medium heat exchange device runs and blows air into the air flow channel of the three-medium heat exchange device. The medium in the air flow channel of the three-medium heat exchange device and the cooling device 4 cool the cooled medium in the first fluid channel through the medium in the second fluid channel, and the medium in the second fluid channel is circulated and cooled by the cooling device 4. This mode is another composite cooling mode. In this mode, the first valve body 7, the third valve body 9 and the fourth valve body 10 are all opened, the second valve body 8 is disconnected, and driven by the third pumping device 11 and the first pumping device 12, each part of the medium moves in a directional manner. All the exhaust steam discharged from the turbine is cooled through the first fluid channel to form condensed water which flows back to the boiler for use; in the three-medium heat exchange device 1, the fan 2 is started and the cooling device 4 is started, and the fan 2 and the cooling device 4 cool the exhaust steam through the air flow channel and the second fluid channel respectively.

[0059] In the third mode, if Figure 4As shown, the first fluid channel is in a connected state between the first main pipe and the second main pipe, the second fluid channel is in a disconnected state with the cooling device 4, the third fluid channel is in a disconnected state between the first main pipe and the second main pipe, and the fourth fluid channel is in a disconnected state with the cooling device 4. The fan 2 in the airflow channel of the three-medium heat exchange device runs and blows air to the airflow channel of the three-medium heat exchange device, and the medium in the airflow channel cools the cooled medium in the first fluid channel; this mode is an air cooling mode, in which the first valve body 7 is opened, the second valve body 8, the third valve body 9 and the fourth valve body 10 are all disconnected, and driven by the third pumping device 11, each part of the medium moves in a directional manner. All the exhaust steam discharged from the turbine is cooled through the first fluid channel to form condensed water that flows back to the boiler for use; in the three-medium heat exchange device 1, the fan 2 is started, and the fan 2 cools the exhaust steam through the airflow channel.

[0060] In the fourth mode, if Figure 5 As shown, the third fluid channel is connected between the first main pipe and the second main pipe, the second fluid channel and the fourth fluid channel are connected through the connection of the first fluid circulation pipeline and the second fluid circulation pipeline, the fan 2 in the air flow channel of the three-medium heat exchange device runs and blows air to the air flow channel of the three-medium heat exchange device, the medium in the air flow channel of the three-medium heat exchange device cools the medium in the second fluid channel, and when the medium in the second fluid channel flows through the condensing device 3, the cooled medium in the third fluid channel is cooled; this mode is an antifreeze mode, in which the second valve body 8 and the fourth valve body 10 are both opened, the first valve body 7 and the third valve body 9 are both disconnected, and driven by the third pumping device 11 and the second pumping device 13, each part of the medium moves in a directional manner. All the exhaust steam discharged from the steam turbine passes through the third fluid channel, the fan 2 is started, and due to the existence of the liquid inlet main pipe and the liquid outlet main pipe and the disconnection of the third valve body 9, the second fluid channel and the fourth fluid channel are connected, the fan 2 cools the circulating medium in the second fluid channel through the air flow channel, the circulating medium moves in a directional manner in the second fluid channel and the fourth fluid channel, and the circulating medium cools the exhaust steam in the condensing device 3. In this mode, the cooling device 4 does not work.

[0061] In the fifth mode, if Figure 6As shown, the first fluid channel is in a connected state between the first main pipe and the second main pipe, and the third fluid channel is in a connected state between the first main pipe and the second main pipe. The cooled medium enters the first fluid channel and the third fluid channel respectively, and the second fluid channel and the fourth fluid channel are connected through the connection of the first fluid circulation pipeline and the second fluid circulation pipeline. The fan 2 in the air flow channel of the three-medium heat exchange device is running, and the medium in the air flow channel of the three-medium heat exchange device cools the cooled medium in the first fluid channel and the medium in the second fluid channel at the same time. When the medium in the second fluid channel flows through the condensing device 3, the cooled medium in the third fluid channel is cooled; in this mode, the cooling device 4 does not work.

[0062] Therefore, the above-mentioned first mode and second mode are suitable for cooling conditions in summer, realizing multiple composite cooling modes with high cooling efficiency to meet the use needs of summer cooling; the above-mentioned fourth mode and fifth mode are suitable for cooling conditions in winter, avoiding the risk of equipment freezing when used in winter; the above-mentioned third mode is suitable for transitional season conditions other than winter and summer.

[0063] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A gas condensation composite cooling system, characterized in that: include: First main pipe; Second trunk; Cooling device (4); A three-medium heat exchange device (1) comprises: a first fluid channel, a second fluid channel and an air flow channel for mutually transferring heat, the first fluid channel being connected between a first main pipe and a second main pipe, and the second fluid channel being connected to the cooling device (4) via a first fluid circulation pipeline; A fan (2), the fan (2) being arranged in the air flow passage of the three-medium heat exchange device; The condensing device (3) comprises: a third fluid channel and a fourth fluid channel for mutual heat transfer, the third fluid channel being connected between a first main pipe and a second main pipe, the fourth fluid channel being connected to the cooling device (4) via a second fluid circulation pipeline, and the first fluid circulation pipeline and the second fluid circulation pipeline being respectively connected in parallel to the liquid inlet end and the liquid outlet end of the cooling device (4) via a liquid inlet main pipe and a liquid outlet main pipe, and the liquid outlet main pipe and the liquid inlet main pipe are both connected to the cooling device (4).

2. The gas condensation composite cooling system according to claim 1, characterized in that: Also includes: a first valve body (7), the first valve body (7) being arranged on a connecting pipe of the first fluid channel connecting the first main pipe and the second main pipe; a second valve body (8), the second valve body (8) being arranged on a connecting pipe of the third fluid channel connecting the first main pipe and the second main pipe; a third valve body (9), the third valve body (9) being arranged on the liquid inlet main pipe or the liquid outlet main pipe; A fourth valve body (10), the fourth valve body (10) being arranged on a first fluid circulation pipeline connecting the cooling device (4) and the second fluid channel.

3. The gas condensation composite cooling system according to claim 1, characterized in that: Also includes: A first pumping device (12), wherein the first pumping device (12) is arranged on the liquid inlet main pipe; A second pumping device (13), wherein the second pumping device (13) is arranged on the second fluid circulation pipeline.

4. The gas condensation composite cooling system according to claim 3, characterized in that: Also includes: A fifth valve body (14), wherein the fifth valve body (14) is arranged on the second fluid circulation pipeline and is connected in parallel with the second pumping device (13).

5. The gas condensation composite cooling system according to claim 1, characterized in that: Also includes: a third pumping device (11), the third pumping device (11) being arranged on the second main pipe; A steam power device (5), wherein the gas outlet of the steam power device (5) is connected to the first trunk pipe; A heating device (6), wherein the liquid inlet of the heating device (6) is connected to the second main pipe, and the exhaust port of the heating device (6) is connected to the air inlet of the steam power device (5) through a gas pipeline.

6. The gas condensation composite cooling system according to any one of claims 1 to 5, characterized in that: The cooling device (4) is one of a direct cooling device and an indirect evaporative cooling device or a combination of the two.

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