Unpowered steam temperature reduction device and steam compressor

Abstract

The invention provides an unpowered steam temperature reduction device and a steam compressor, and relates to the technical field of compressors, the device comprises a gas-liquid separator, a cooling unit, an ejector and a spray cooler, the gas-liquid separator is used for separating moisture in input steam of the steam compressor; the cooling unit is used for cooling water separated by the gas-liquid separator and providing cooling water for the ejector; the ejector is used for ejecting cooling water in the cooling unit, and the ejected cooling water is mixed with steam output by the compression cavity to form mixed steam; and the spray cooler is used for cooling the mixed steam and outputting the cooled mixed steam. The ejector is introduced to replace a traditional power device to convey cooling water, the operation reliability of the whole unit is improved, the overall stability and durability of the device are further enhanced, and effective utilization of energy, energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to an unpowered steam temperature reducing device and a steam compressor. Background Art

[0002] Centrifugal steam compressors, as key equipment for compressing steam, play a vital role in industries such as chemical industry that need to produce and transport steam. During the working process of centrifugal steam compressors, the temperature of steam directly after compression is usually very high, generally reaching around 300°C. Such high temperatures not only pose challenges to downstream pipelines, but also put forward strict requirements on the reflux system of the compressor itself, so the steam cooling link is particularly important.

[0003] At present, the main solution to achieve steam desuperheating is to use a spray cooler to cool high-temperature and high-pressure steam. This solution requires a complex power device to provide cooling water with sufficient flow and pressure. The main pump, auxiliary pump and its ancillary equipment are used to extract cooling water from the cooling tower and pressurize it to the spray cooler. The introduction of these power devices not only increases the structural complexity of the entire system, but also brings additional control requirements. The complexity of the control system not only increases the difficulty of operation and maintenance, but also increases the risk of system failure. Therefore, how to simplify the structure of the steam desuperheating system to reduce the probability of failure has become an urgent problem to be solved in the development of centrifugal steam compressors. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a non-powered steam cooling device and a steam compressor, which effectively solve the problem of high structural complexity of the existing steam cooling system leading to system failure.

[0005] In a first aspect, the present invention provides an unpowered steam temperature reduction device, which is applied to a steam compressor, and comprises a gas-liquid separator, a cooling unit, an ejector and a spray cooler, wherein:

[0006] The first end of the gas-liquid separator is connected to the steam input channel of the steam compressor, the second end of the gas-liquid separator is connected to the compression chamber input end of the steam compressor, and the third end of the gas-liquid separator is connected to the first end of the cooling unit. The gas-liquid separator is used to separate the moisture in the input steam of the steam compressor;

[0007] The second end of the cooling unit is connected to the first end of the ejector, and the third end of the cooling unit is connected to an external water source. The cooling unit is used to cool the water separated by the gas-liquid separator and provide cooling water to the ejector;

[0008] The second end of the ejector is connected to the compression chamber output end of the steam compressor, and the third end of the ejector is connected to the first end of the spray cooler. The ejector is used to eject cooling water in the cooling unit, and the ejected cooling water is mixed with the steam output from the compression chamber to form mixed steam;

[0009] The spray cooler is used for cooling the mixed steam and then outputting it.

[0010] Furthermore, the device also includes an anti-surge reflux valve, a first end of the anti-surge reflux valve is connected to the second end of the spray cooler, the second end of the spray cooler is connected to the downstream pipeline of the steam compressor, the second end of the anti-surge reflux valve is connected to the fourth end of the gas-liquid separator, and the anti-surge reflux valve is used to return the steam output by the spray cooler to the gas-liquid separator.

[0011] Furthermore, the device also includes an anti-surge reflux valve, a first end of the anti-surge reflux valve is connected to the compression chamber output end of the steam compressor, the compression chamber output end of the steam compressor is connected to the downstream pipeline network of the steam compressor, and the second end of the anti-surge reflux valve is connected to the second end of the ejector, and the anti-surge reflux valve is used to return the steam output from the compression chamber output end of the steam compressor to the ejector.

[0012] Furthermore, an air intake regulating valve is provided between the gas-liquid separator and the steam input channel of the steam compressor, and the air intake regulating valve is used to adjust the air intake flow rate of the steam.

[0013] Furthermore, a drain valve is arranged between the gas-liquid separator and the cooling unit, and the drain valve is used to discharge condensed water formed by the gas-liquid separator into the cooling unit.

[0014] Furthermore, a water inlet valve is provided between the cooling unit and the external water source, and the water inlet valve is used to adjust the water inlet flow rate of the external water source.

[0015] Furthermore, a cooling water regulating valve is provided between the cooling unit and the ejector, and the cooling water regulating valve is used to adjust the flow rate of cooling water ejected by the ejector.

[0016] Furthermore, a check valve is provided between the spray cooler and a downstream pipe network of the steam compressor, and the check valve is used to prevent the steam output to the downstream pipe network from flowing back.

[0017] Furthermore, a check valve is arranged between the compression chamber output end of the steam compressor and the downstream pipeline network, and the check valve is used to prevent the steam output to the downstream pipeline network from flowing back.

[0018] In a second aspect, the present invention provides a steam compressor, comprising the unpowered steam cooling device described in the first aspect of the present invention.

[0019] The unpowered steam cooling device and steam compressor provided by the present invention, by introducing an ejector to replace the traditional power device to transport cooling water, reduces the risk of interruption of the cooling process due to power system failure and improves the reliability of the operation of the entire unit. At the same time, it reduces the complexity of the device, reduces the maintenance cost and difficulty, is easy to inspect and repair, and further enhances the overall stability and durability of the device. The long-term operation and maintenance costs will also be reduced due to the simplification of the device, bringing more considerable economic benefits to users. The unpowered design uses the ejection principle to naturally drive the flow of cooling water without the need for additional consumption of electricity or other energy, thereby achieving effective energy utilization and energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is a first schematic diagram of the structure of the unpowered steam desuperheating device provided in an embodiment of the present invention;

[0022] Figure 2 is a second schematic diagram of the structure of the unpowered steam desuperheating device provided in an embodiment of the present invention;

[0023] Figure 3 is a third schematic diagram of the structure of the unpowered steam desuperheating device provided in an embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of a steam compressor provided in an embodiment of the present invention.

[0025] Explanation of the main component symbols: 100, non-powered steam cooling device; 110-gas-liquid separator; 120-cooling unit; 130-ejector; 140-spray cooler; 150-anti-surge backflow valve; 160-intake regulating valve; 170-drain valve; 180-water inlet valve; 190-cooling water regulating valve; 200-check valve; 310-first compression unit; 320-second compression unit; 300-compression chamber; 400-steam compressor. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It should be noted that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0029] At present, the main solution to achieve steam desuperheating is to use a spray cooler to cool high-temperature and high-pressure steam. This solution requires a complex power device to provide cooling water with sufficient flow and pressure. The main pump, auxiliary pump and its ancillary equipment are used to extract cooling water from the cooling tower and pressurize it to the spray cooler. The introduction of these power devices not only increases the structural complexity of the entire system, but also brings additional control requirements. The complexity of the control system not only increases the difficulty of operation and maintenance, but also increases the risk of system failure. Therefore, how to simplify the structure of the steam desuperheating system to reduce the probability of failure has become an urgent problem to be solved in the development of centrifugal steam compressors.

[0030] Example 1

[0031] The embodiment of the present invention provides a non-powered steam cooling device, which effectively solves the problem of high structural complexity of the existing steam cooling system leading to system failure. The non-powered steam cooling device is applied to steam compressors. Figure 1 is a first schematic diagram of the structure of the unpowered steam cooling device provided by an embodiment of the present invention, such as Figure 1 As shown, the unpowered steam desuperheating device 100 includes a gas-liquid separator 110 , a cooling unit 120 , an ejector 130 and a spray cooler 140 .

[0032] The application scenario of the unpowered steam desuperheating device 100 provided in the embodiment of the present invention is that the high-temperature and high-pressure steam needs to be cooled to reduce its temperature and pressure before being transported to the downstream pipeline network for use. This is usually to protect downstream equipment from damage by the high-temperature and high-pressure steam, or to meet the requirements of a specific process for steam temperature and pressure. Figure 2 is a second schematic diagram of the structure of the unpowered steam cooling device provided in an embodiment of the present invention, such as Figure 2 As shown, the first end of the gas-liquid separator 110 is connected to the steam input channel of the steam compressor, the second end of the gas-liquid separator 110 is connected to the input end of the compression chamber 300 of the steam compressor, and the third end of the gas-liquid separator 110 is connected to the first end of the cooling unit 120. The gas-liquid separator 110 is used to separate the moisture in the upstream steam to ensure that the steam entering the compression stage is all in gaseous state, avoiding the impact of liquid steam on the compression impeller, causing damage to the impeller and other abnormalities.

[0033] Optionally, an air intake regulating valve 160 is provided between the gas-liquid separator 110 and the steam input channel of the steam compressor, and the air intake regulating valve 160 is used to adjust the air intake flow rate of the steam.

[0034] In an embodiment of the present invention, the compression chamber 300 includes a primary compression unit 310 and a secondary compression unit 320. The gaseous steam after gas-liquid separation enters the impellers of the primary compression unit 310 and the secondary compression unit 320 in the compression chamber 300 for compression.

[0035] The second end of the cooling unit 120 is connected to the first end of the ejector 130, and the third end of the cooling unit 120 is connected to an external water source. The cooling unit 120 is used to cool the water separated by the gas-liquid separator 110 and provide cooling water to the ejector 130. In the embodiment of the present invention, the cooling unit 120 may be a cooling tower.

[0036] Optionally, a steam trap 170 is provided between the gas-liquid separator 110 and the cooling unit 120, and the steam trap 170 is used to discharge the condensed water formed by the gas-liquid separator 110 into the cooling unit 120. The liquid steam separated from the gas-liquid separator 110 flows into the cooling unit 120 through the steam trap 170, thereby discharging the condensed water, air and carbon dioxide gas in the steam system as quickly as possible, while automatically preventing the leakage of steam to the maximum extent.

[0037] Optionally, a water inlet valve 180 is provided between the cooling unit 120 and the external water source, and the water inlet valve 180 is used to adjust the water inlet flow rate of the external water source. In the embodiment of the present invention, the external water source can use desalted water, which is not easy to form scale during the cooling process, and has a weaker corrosive effect on the cooling unit 120 and related equipment, thereby reducing corrosion and wear of the device and extending the service life of the device.

[0038] The second end of the ejector 130 is connected to the output end of the compression chamber 300 of the steam compressor, and the third end of the ejector 130 is connected to the first end of the spray cooler 140. The ejector 130 is used to eject cooling water in the cooling unit 120, and the ejected cooling water is mixed with the steam output from the compression chamber 300 to form mixed steam. In the embodiment of the present invention, the ejector 130 is a device that uses a high-speed, high-energy flow (called a power source) to eject another low-speed, low-energy flow (called an ejected flow), and mixes the two together. In this process, the power source transfers its energy to the ejected flow, so that the two are ejected from the outlet together. This energy transfer process increases the energy of the ejected flow, thereby achieving mixing and acceleration of the fluid.

[0039] In an embodiment of the present invention, the power source of the ejector 130 is the high-temperature and high-pressure steam compressed by the primary compression unit 310 and the secondary compression unit 320. The ejected flow is the cooling water in the cooling unit 120. The temperature of the cooling water is reduced after heat dissipation in the cooling unit 120, but its energy is relatively low. Through the action of the ejector 130, the energy of the high-temperature and high-pressure steam can be transferred to the cooling water to increase its energy. When the high-temperature and high-pressure steam enters the ejector 130, the negative pressure area generated by its high-speed flow will attract the cooling water in the cooling tower to enter the ejector 130. Inside the ejector 130, the high-temperature and high-pressure steam mixes and transfers energy with the cooling water. The mixed fluid has higher energy and temperature, and then is ejected together from the outlet of the ejector 130 and enters the spray cooler 140.

[0040] In the embodiment of the present invention, a cooling water regulating valve 190 is provided between the cooling unit 120 and the ejector 130 , and the cooling water regulating valve 190 is used to adjust the spray flow rate of the cooling water ejected by the ejector 130 .

[0041] The mixed fluid (mixture of high-temperature and high-pressure steam and cooling water) entering the spray cooler 140 is further cooled and dissipated in the spray cooler 140. The spray cooler 140 disperses the mixed fluid into fine droplets by spraying, increasing the contact area between the fluid and the air, thereby improving the heat dissipation efficiency. After the cooling effect of the spray cooler 140, the temperature of the mixed fluid is reduced, achieving the purpose of cooling the high-temperature and high-pressure steam.

[0042] In the embodiment of the present invention, the unpowered steam cooling device 100 further includes an anti-surge reflux valve 150, the first end of which is connected to the second end of the spray cooler 140, the second end of which is connected to the downstream pipe network of the steam compressor, and the high-temperature and high-pressure steam is brought into the spray cooler 140 for sufficient mixing and cooling before being input into the downstream pipe network. The second end of the anti-surge reflux valve 150 is connected to the fourth end of the gas-liquid separator 110, and the anti-surge reflux valve 150 is used to return the steam output from the spray cooler 140 to the gas-liquid separator 110.

[0043] In the embodiment of the present invention, a check valve 200 is provided between the spray cooler 140 and the downstream pipe network of the steam compressor, and the check valve 200 is used to prevent the steam output to the downstream pipe network from flowing back. Most of the steam after cooling will go to the downstream pipe network through the check valve 200, and when anti-surge control is required, a part of the steam will flow back to the gas-liquid separator 110 through the anti-surge reflux valve 150.

[0044] In the embodiment of the present invention, when anti-surge control is required, the anti-surge reflux valve 150 will open quickly to allow a portion of the compressed steam to flow back into the gas-liquid separator 110. By providing the anti-surge reflux valve 150, the workload of the compressor can be reduced, the inlet flow rate can be increased, and the compressor can be protected from damage by surge.

[0045] The unpowered steam cooling device provided in the embodiment of the present invention eliminates the power system for conveying cooling water. An ejector is provided in front of the spray cooler to replace the existing power device, and the effect of ejection is utilized to convey cooling water, thereby realizing the cooling effect on high-temperature and high-pressure steam, thereby greatly improving the reliability of the operation of the entire unit.

[0046] Example 2

[0047] The application scenario of the unpowered steam cooling device 100 provided in the embodiment of the present invention is: high-temperature and high-pressure steam can be directly transported to the downstream pipeline network for use without cooling, the downstream equipment or process can withstand the conditions of high-temperature and high-pressure steam, or the high-temperature and high-pressure characteristics of the steam itself are required by the process. Figure 3 is a third schematic diagram of the structure of the unpowered steam cooling device provided in an embodiment of the present invention, such as Figure 3 As shown, the first end of the gas-liquid separator 110 is connected to the steam input channel of the steam compressor, the second end of the gas-liquid separator 110 is connected to the input end of the compression chamber 300 of the steam compressor, and the third end of the gas-liquid separator 110 is connected to the first end of the cooling unit 120. The gas-liquid separator 110 is used to separate the moisture in the upstream steam to ensure that the steam entering the compression stage is all in gaseous state, avoiding the impact of liquid steam on the compression impeller, causing damage to the impeller and other abnormalities.

[0048] Optionally, an air intake regulating valve 160 is provided between the gas-liquid separator 110 and the steam input channel of the steam compressor, and the air intake regulating valve 160 is used to adjust the air intake flow rate of the steam.

[0049] In an embodiment of the present invention, the compression chamber 300 includes a primary compression unit 310 and a secondary compression unit 320. The gaseous steam after gas-liquid separation enters the impellers of the primary compression unit 310 and the secondary compression unit 320 in the compression chamber 300 for compression.

[0050] The second end of the cooling unit 120 is connected to the first end of the ejector 130, and the third end of the cooling unit 120 is connected to an external water source. The cooling unit 120 is used to cool the water separated by the gas-liquid separator 110 and provide cooling water to the ejector 130. In the embodiment of the present invention, the cooling unit 120 may be a cooling tower.

[0051] Optionally, a steam trap 170 is provided between the gas-liquid separator 110 and the cooling unit 120, and the steam trap 170 is used to discharge the condensed water formed by the gas-liquid separator 110 into the cooling unit 120. The liquid steam separated from the gas-liquid separator 110 flows into the cooling unit 120 through the steam trap 170, thereby discharging the condensed water, air and carbon dioxide gas in the steam system as quickly as possible, while automatically preventing the leakage of steam to the maximum extent.

[0052] Optionally, a water inlet valve 180 is provided between the cooling unit 120 and the external water source, and the water inlet valve 180 is used to adjust the water inlet flow rate of the external water source. In the embodiment of the present invention, the external water source can use desalted water, which is not easy to form scale during the cooling process, and has a weaker corrosive effect on the cooling unit 120 and related equipment, thereby reducing corrosion and wear of the device and extending the service life of the device.

[0053] The second end of the ejector 130 is connected to the output end of the compression chamber 300 of the steam compressor, and the third end of the ejector 130 is connected to the first end of the spray cooler 140. The ejector 130 is used to eject cooling water in the cooling unit 120, and the ejected cooling water is mixed with the steam output from the compression chamber 300 to form mixed steam. In the embodiment of the present invention, the ejector 130 is a device that uses a high-speed, high-energy flow (called a power source) to eject another low-speed, low-energy flow (called an ejected flow), and mixes the two together. In this process, the power source transfers its energy to the ejected flow, so that the two are ejected from the outlet together. This energy transfer process increases the energy of the ejected flow, thereby achieving mixing and acceleration of the fluid.

[0054] In an embodiment of the present invention, the power source of the ejector 130 is the high-temperature and high-pressure steam compressed by the primary compression unit 310 and the secondary compression unit 320. The ejected flow is the cooling water in the cooling unit 120. The temperature of the cooling water is reduced after heat dissipation in the cooling unit 120, but its energy is relatively low. Through the action of the ejector 130, the energy of the high-temperature and high-pressure steam can be transferred to the cooling water to increase its energy. When the high-temperature and high-pressure steam enters the ejector 130, the negative pressure area generated by its high-speed flow will attract the cooling water in the cooling tower to enter the ejector 130. Inside the ejector 130, the high-temperature and high-pressure steam mixes and transfers energy with the cooling water. The mixed fluid has higher energy and temperature, and then is ejected together from the outlet of the ejector 130 and enters the spray cooler 140.

[0055] In the embodiment of the present invention, a cooling water regulating valve 190 is provided between the cooling unit 120 and the ejector 130 , and the cooling water regulating valve 190 is used to adjust the spray flow rate of the cooling water ejected by the ejector 130 .

[0056] The mixed fluid (mixture of high-temperature and high-pressure steam and cooling water) entering the spray cooler 140 is further cooled and dissipated in the spray cooler 140. The spray cooler 140 disperses the mixed fluid into fine droplets by spraying, increasing the contact area between the fluid and the air, thereby improving the heat dissipation efficiency. After the cooling effect of the spray cooler 140, the temperature of the mixed fluid is reduced, achieving the purpose of cooling the high-temperature and high-pressure steam.

[0057] In an embodiment of the present invention, the unpowered steam cooling device 100 also includes an anti-surge reflux valve 150, the first end of the anti-surge reflux valve 150 is connected to the output end of the compression chamber 300 of the steam compressor, the output end of the compression chamber 300 of the steam compressor is connected to the downstream pipeline network of the steam compressor, and the second end of the anti-surge reflux valve 150 is connected to the second end of the ejector 130. The anti-surge reflux valve 150 is used to reflux the steam output from the output end of the compression chamber 300 of the steam compressor to the ejector 130.

[0058] In the embodiment of the present invention, a check valve 200 is provided between the output end of the compression chamber 300 of the steam compressor and the downstream pipe network, and the check valve 200 is used to prevent the steam output to the downstream pipe network from flowing back. Since some process flows do not require cooling of the high-temperature and high-pressure steam entering the downstream pipe network, in the embodiment of the present invention, the high-temperature and high-pressure steam can go directly to the downstream pipe network through the check valve 200.

[0059] In an embodiment of the present invention, when anti-surge control is required, the anti-surge reflux valve 150 will open quickly, and a portion of the high-temperature and high-pressure steam will reflux through the anti-surge reflux valve 150. The refluxed high-temperature and high-pressure steam passes through the ejector 130 and ejects the cooling water in the cooling unit 120, and then enters the spray cooler 140 together for sufficient mixing and cooling, and then flows into the gas-liquid separator 110.

[0060] The unpowered steam desuperheating device provided by the embodiment of the present invention reduces the risk of interruption of the desuperheating process due to power system failure by introducing an ejector to replace the traditional power device to transport cooling water, thereby improving the reliability of the operation of the entire unit. At the same time, the complexity of the device is reduced, the maintenance cost and difficulty are reduced, and the inspection and maintenance are easy, which further enhances the overall stability and durability of the device. The long-term operation and maintenance costs will also be reduced due to the simplification of the device, bringing more considerable economic benefits to users.

[0061] Example 3

[0062] Based on the same technical concept, an embodiment of the present invention provides a steam compressor. Figure 4 Schematic diagram of the structure of the steam compressor provided by the embodiment of the present invention. Figure 4 As shown, the steam compressor 400 includes the unpowered steam temperature reduction device 100 in the above-mentioned embodiment 1 or embodiment 2.

[0063] The steam compressor provided by the embodiment of the present invention reduces the risk of interruption of the cooling process due to power system failure by introducing an ejector to replace the traditional power device to transport cooling water, thereby improving the reliability of the operation of the entire unit. The unpowered design uses the ejector principle to naturally drive the flow of cooling water without consuming additional electricity or other energy, thereby achieving effective energy utilization and energy saving and emission reduction.

[0064] In summary, the unpowered steam cooling device and steam compressor provided by the present invention, by introducing an ejector to replace the traditional power device to transport cooling water, reduces the risk of interruption of the cooling process due to power system failure and improves the reliability of the operation of the entire unit. At the same time, it reduces the complexity of the device, reduces the maintenance cost and difficulty, is easy to inspect and repair, and further enhances the overall stability and durability of the device. The long-term operation and maintenance costs will also be reduced due to the simplification of the device, bringing more considerable economic benefits to users. The unpowered design uses the ejection principle to naturally drive the flow of cooling water without the need for additional consumption of electricity or other energy, thereby achieving effective energy utilization and energy conservation and emission reduction.

[0065] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0066] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 embodiments of the present invention.

Claims

1. A non-powered steam cooling device, characterized in that: The device is applied to a steam compressor, and comprises a gas-liquid separator, a cooling unit, an ejector and a spray cooler, wherein: The first end of the gas-liquid separator is connected to the steam input channel of the steam compressor, the second end of the gas-liquid separator is connected to the compression chamber input end of the steam compressor, and the third end of the gas-liquid separator is connected to the first end of the cooling unit. The gas-liquid separator is used to separate the moisture in the input steam of the steam compressor; The second end of the cooling unit is connected to the first end of the ejector, and the third end of the cooling unit is connected to an external water source. The cooling unit is used to cool the water separated by the gas-liquid separator and provide cooling water to the ejector; The second end of the ejector is connected to the compression chamber output end of the steam compressor, and the third end of the ejector is connected to the first end of the spray cooler. The ejector is used to eject cooling water in the cooling unit, and the ejected cooling water is mixed with the steam output from the compression chamber to form mixed steam; The spray cooler is used for cooling the mixed steam and then outputting it.

2. The unpowered steam cooling device according to claim 1, characterized in that: The device also includes an anti-surge reflux valve, a first end of the anti-surge reflux valve is connected to the second end of the spray cooler, the second end of the spray cooler is connected to the downstream pipeline of the steam compressor, and the second end of the anti-surge reflux valve is connected to the fourth end of the gas-liquid separator. The anti-surge reflux valve is used to return the steam output by the spray cooler to the gas-liquid separator.

3. The unpowered steam cooling device according to claim 1, characterized in that: The device also includes an anti-surge reflux valve, a first end of the anti-surge reflux valve is connected to the compression chamber output end of the steam compressor, the compression chamber output end of the steam compressor is connected to the downstream pipeline network of the steam compressor, and the second end of the anti-surge reflux valve is connected to the second end of the ejector. The anti-surge reflux valve is used to return the steam output from the compression chamber output end of the steam compressor to the ejector.

4. The unpowered steam cooling device according to any one of claims 1 to 3, characterized in that: An air intake regulating valve is arranged between the gas-liquid separator and the steam input channel of the steam compressor, and the air intake regulating valve is used to adjust the air intake flow rate of the steam.

5. The unpowered steam cooling device according to any one of claims 1 to 3, characterized in that: A drain valve is arranged between the gas-liquid separator and the cooling unit, and the drain valve is used to discharge condensed water formed by the gas-liquid separator into the cooling unit.

6. The unpowered steam cooling device according to any one of claims 1 to 3, characterized in that: A water inlet valve is arranged between the cooling unit and the external water source, and the water inlet valve is used to adjust the water inlet flow rate of the external water source.

7. The unpowered steam cooling device according to any one of claims 1 to 3, characterized in that: A cooling water regulating valve is arranged between the cooling unit and the ejector, and the cooling water regulating valve is used to adjust the flow rate of cooling water ejected by the ejector.

8. The unpowered steam cooling device according to claim 2, characterized in that: A check valve is arranged between the spray cooler and the downstream pipe network of the steam compressor, and the check valve is used to prevent the steam output to the downstream pipe network from flowing back.

9. The unpowered steam desuperheating device according to claim 3, characterized in that: A check valve is arranged between the compression chamber output end of the steam compressor and the downstream pipe network, and the check valve is used to prevent the steam output to the downstream pipe network from flowing back.

10. A steam compressor, characterized in that: The steam compressor comprises the unpowered steam cooling device according to any one of claims 1 to 9.

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