A condensation-reheat type gas whitening device

Abstract

This utility model discloses a condensation-reheat type gas whitening device, belonging to the field of humid gas whitening technology. It includes: a hydrophobic storage system for storing steam condensate from a hydrophobic pipe and outputting high-humidity gas from the steam condensate; a condensation system connected to the hydrophobic storage system for condensing and drying the high-humidity gas output from the hydrophobic storage system into saturated humid gas before output; and a reheating device connected to the hydrophobic storage system and the condensation system for cooling the steam condensate output from the hydrophobic pipe before inputting it into the hydrophobic storage system, and simultaneously heating the saturated humid gas output from the condensation system to form unsaturated high-temperature gas before discharge. This application utilizes heat exchange between the saturated humid gas and the steam condensate in the reheating device, which can effectively reduce the temperature of the steam condensate entering the hydrophobic storage system, thereby mitigating the degree of flash evaporation of the steam condensate.

Description

Technical Field

[0001] This utility model relates to the field of humid gas whitening technology, and more specifically, to a condensation-reheat type gas whitening device. Background Technology

[0002] Currently, SCR denitrification in thermal power plants generally adopts the urea hydrolysis process. In the urea hydrolysis process, the urea hydrolysis reactor and the product gas pipeline in the hydrolysis zone need to be heated or traced with 0.7-1.0MPa saturated steam. The steam condensate formed by the saturated steam is discharged through the steam trap and then collected through the steam trap before flowing into the steam trap for storage.

[0003] The temperature of the steam condensate before the steam trap is generally above 140℃, and it is saturated water with relatively high pressure. However, the pressure inside the steam trap is at atmospheric pressure. Therefore, after the steam condensate flows through the steam trap and the drain pipe to the steam trap, the pressure drops significantly, causing some of the steam condensate to flash. This generates a large amount of water vapor in the upper space of the steam trap, resulting in a high humidity content in the gas discharged from the steam trap to the outside. When the discharged high-humidity gas mixes with the ambient cold air and cools down, the water vapor contained in the high-humidity gas undergoes saturated condensation. The condensed water droplets refract and scatter light, resulting in a severe white fog phenomenon, which forms visual pollution and affects the plant environment. At the same time, the white fog carries away a large amount of water vapor, resulting in a waste of demineralized water. Utility Model Content

[0004] The purpose of this invention is to solve the technical problem of flash evaporation of steam condensate entering the condensate tank, which leads to the formation of white mist in the exhaust gas of the condensate tank, and to propose a condensation reheat gas whitening device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A condensation-reheat type gas whitening device, wherein the condensation-reheat type gas whitening device is connected to a drainage pipe, comprising:

[0007] A hydrophobic storage system for storing steam condensate from a hydrophobic pipe and outputting high-humidity gas from the steam condensate;

[0008] A condensation system, which is connected to the hydrophobic storage system, is used to condense the high-humidity gas output from the hydrophobic storage system into saturated humid gas before outputting it.

[0009] A reheating device is connected between the hydrophobic storage system and the hydrophobic pipe, and is also connected to the condensation system. The reheating device is used to cool the steam condensate output from the hydrophobic pipe and input it into the hydrophobic storage system, while simultaneously heating the saturated humid gas output from the condensation system to form unsaturated high-temperature gas before discharging it.

[0010] Furthermore, the hydrophobic storage system includes:

[0011] A condensate drain tank, the interior of which is a space for containing steam condensate;

[0012] A distribution network is horizontally installed inside the drain tank and close to the bottom of the drain tank.

[0013] A steam condensate inlet pipe is inserted into the condensate tank, and one end of the steam condensate inlet pipe is connected to the distribution network.

[0014] A water collection pit is provided outside the condensate tank to collect steam condensate overflowing from the condensate tank;

[0015] An overflow pipe is provided, with its two ends connected to the drainage tank and the water collection pit, respectively. The outlet of the overflow pipe is inserted into the water collection pit, and the liquid level of the wastewater stored in the water collection pit is at least 100 mm higher than the outlet level of the overflow pipe.

[0016] Furthermore, the condensation system includes:

[0017] A spray tower is located above the condensate tank and is connected to the condensate tank.

[0018] A packing layer is disposed inside the spray tower and located at the bottom of the spray tower. The packing layer is made of structured metal packing.

[0019] A demineralized water spraying device is installed inside the spraying tower and located above the packing layer. The demineralized water spraying device is used to spray demineralized water to cool high-humidity gas.

[0020] A metal wire mesh demister is installed inside the spray tower and located above the demineralized water spray device. The metal wire mesh demister is used to remove mist droplets carried in saturated humid gas.

[0021] A fan is installed above and connected to the spray tower. The fan is used to pressurize the saturated humid gas and output it to the reheat device.

[0022] Furthermore, the reheating device employs a shell-and-tube heat exchanger, with the gas inlet of the reheating device connected to the fan and the gas outlet of the reheating device connected to the outside; the unsaturated high-temperature gas inside the reheating device is discharged to the outside along the shell side of the reheating device.

[0023] The liquid inlet of the reheating device is connected to the condensate drain pipe, and the liquid outlet of the reheating device is connected to the steam condensate inlet pipe; the steam condensate in the reheating device is transported along the tube side of the reheating device to the steam condensate inlet pipe.

[0024] Furthermore, the distributed pipeline network includes:

[0025] The main pipe has its end connected to the steam condensate inlet pipe. The bottom surface of the main pipe has a plurality of evenly spaced first small round holes along its axial direction. The first small round holes are used to discharge the steam condensate located in the main pipe. The top surface of the main pipe has a plurality of evenly spaced third small round holes along its axial direction. The third small round holes are used to discharge the water vapor located in the main pipe.

[0026] A plurality of sub-tubes are connected to the main tube. The bottom surface of each sub-tube is provided with a plurality of evenly spaced second small circular holes along its axial direction. The second small circular holes are used to discharge steam condensate located in the sub-tube. The top surface of each sub-tube is provided with a plurality of evenly spaced fourth small circular holes along its axial direction. The fourth small circular holes are used to discharge water vapor located in the sub-tube.

[0027] Furthermore, the demineralized water spraying device includes:

[0028] The demineralized water pipeline is provided with an inlet end and two outlet ends. The two outlet ends of the demineralized water pipeline are located inside the spray tower and are arranged vertically.

[0029] The first nozzle and the second nozzle are respectively connected to the two discharge ends of the demineralized water pipe and are used to spray demineralized water downwards.

[0030] A manual valve is installed on the demineralized water pipeline to control the on / off state of the demineralized water pipeline;

[0031] A Y-type filter is installed on the demineralized water pipeline;

[0032] An electric valve is installed on the demineralized water pipeline;

[0033] An electric regulating valve is installed on the demineralized water pipeline and is used to regulate the flow rate of demineralized water in the demineralized water pipeline.

[0034] Furthermore, the operating liquid level of the steam condensate in the condensate tank is at least 100 mm higher than the top elevation of the distribution pipe network.

[0035] The beneficial effects of this utility model are as follows: The condensation-reheat gas whitening device provided in this application uses a spray tower to directly contact and condense the high-humidity gas discharged from the condensate tank, resulting in good heat exchange effect and low cost. After the saturated humid gas is cooled and dehumidified by the spray tower, it is pressurized by a fan and enters the reheat device. In the reheat device, the high-temperature heat contained in the steam condensate is used to heat the saturated humid gas, turning it into an unsaturated high-temperature gas. The water vapor content of the unsaturated high-temperature gas has not reached a saturated state and does not have the conditions for rapid condensation to form water droplets. Therefore, the gas discharged outdoors will not produce obvious white fog. Furthermore, by using the saturated humid gas and the steam condensate to exchange heat in the reheat device, the temperature of the steam condensate entering the condensate tank can be effectively reduced, thereby reducing the degree of flash evaporation of the steam condensate in the condensate tank. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of a condensation-reheat type gas whitening device provided in an embodiment of this utility model;

[0037] Figure 2 This is a bottom view of the distributed pipe network in an embodiment of this utility model;

[0038] Figure 3 This is a top view of the distribution pipeline network in an embodiment of this utility model.

[0039] The markings in the diagram are as follows:

[0040] 1. Hydrophobic storage system;

[0041] 11. Drainage tank; 111. Vent; 12. Steam condensate inlet pipe; 13. Distribution network; 131. Main pipe; 132. Daughter pipe; 14. Overflow pipe; 15. Sump;

[0042] 2. Condensation system;

[0043] 21. Spray tower; 22. Packing layer; 23. Demineralized water spraying device; 231. Demineralized water pipeline; 232. First nozzle; 233. Second nozzle; 234. Manual valve; 235. Y-type filter; 236. Electric valve; 237. Electric regulating valve; 238. Pressure gauge; 239. Flow meter; 24. Metal wire mesh demister; 25. Fan;

[0044] 3. Reheating device. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0046] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean 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.

[0048] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0049] Currently, the main methods for eliminating white spots in humid gases are heating, condensation, and condensation-reheat. Heating directly heats the gas, ensuring that the gas humidity remains below atmospheric saturation during cooling to ambient temperature, preventing water vapor condensation. Condensation cools the gas using cooling water, causing water vapor to condense and separate. Condensation-reheat is an organic combination of heating and condensation, integrating the advantages of both methods. Condensation includes direct contact condensation and indirect contact condensation. Direct contact condensation uses atomized cooling water to directly exchange heat with the gas, offering high heat exchange efficiency and lower cost. Please refer to [link to relevant documentation]. Figures 1 to 3 The illustrated embodiment of this application provides a condensation-reheat gas whitening device. In practical applications, the condensation-reheat gas whitening device is used to reduce the amount of water vapor formed by the flash evaporation of steam condensate and to prevent the formation of white fog after the gas in the condensate tank is discharged outdoors. At the same time, it can condense the water vapor in the discharged high-humidity gas into demineralized water for recycling. The condensation-reheat gas whitening device adopts a direct contact condensation method and has the advantages of good whitening effect, energy saving and water saving, and wide application range.

[0050] The condensing-reheating gas whitening equipment includes: a condensate storage system 1, a condensation system 2, and a reheating device 3; wherein, the condensate storage system 1 is used to store steam condensate from the condensate pipe and output high-humidity gas from the steam condensate; more specifically, the condensate storage system 1 includes: a condensate tank 11, a steam condensate inlet pipe 12, a distribution pipe network 13, an overflow pipe 14, and a collection pit 15; the steam condensate inlet pipe 12 is inserted into the condensate tank 11, and the lower end of the steam condensate inlet pipe 12 is connected to the distribution pipe network 13, so that the steam condensate is introduced into the distribution pipe network 13 through the steam condensate inlet pipe 12, and then discharged into the condensate tank 11 for storage through the distribution pipe network 13; the condensate tank 11 is provided with a vent 111 on its body, which connects the condensate tank 11 to the atmosphere. When the condensing-reheating gas whitening equipment is running, the condensate tank 11 draws in air through the vent 111 to cool the steam condensate and gas inside.

[0051] The distribution network 13 is horizontally installed inside the drain tank 11, and is located near the bottom of the drain tank 11; please refer to Figure 2 and Figure 3The distribution network 13 includes: a main pipe 131 connected to the steam condensate inlet pipe 12, and several sub-pipes 132 connected to the main pipe 131; both ends of the main pipe 131 and the sub-pipes 132 are sealed with blind flanges; the bottom surface of the main pipe 131 has a plurality of evenly spaced first small round holes along the axial direction of the main pipe 131, and the bottom surface of the sub-pipes 132 has a plurality of evenly spaced second small round holes along the axial direction of the sub-pipes 132; the top surface of the main pipe 131 has a plurality of evenly spaced third small round holes along the axial direction of the main pipe 131, and the plurality of third small round holes on the main pipe 131 are staggered, with an angle of 30° to 60° with the vertical direction; the top surface of the sub-pipes 132 has a plurality of evenly spaced fourth small round holes along the axial direction of the sub-pipes 132, and the plurality of fourth small round holes on the sub-pipes 132 are staggered, with an angle of 30° to 60° with the vertical direction. In this embodiment, the height of the distribution network 13 from the bottom of the condensate tank 11 can be set to 400 to 600 mm. The operating liquid level in the condensate tank 11 must be at least 100 mm higher than the top level of the distribution network 13 to ensure that the distribution network 13 is completely submerged in the steam condensate. During normal operation of the condensing reheat gas whitening equipment, the steam condensate is transported to the distribution network 13 along the steam condensate inlet pipe 12. During this process, some of the steam condensate undergoes flash evaporation, and the water vapor formed by the flash evaporation enters the main pipe 131 together with the steam condensate for further processing. The steam condensate in the distribution network 13 is discharged into the condensate tank 11 through the first and second small round holes. Water vapor and air are discharged into the condensate tank 11 through the third and fourth small round holes. The water vapor scattered from the third and fourth small round holes directly contacts the steam condensate in the condensate tank 11 for heat exchange in the form of bubbles. This causes most of the water vapor discharged from the distribution network 13 to be condensed into water, and the remaining small amount of high-humidity gas is collected at the top of the condensate tank 11 and discharged, thereby reducing the amount of water vapor generated in the condensate tank 11.

[0052] The two ends of the overflow pipe 14 are connected to the condensate tank 11 and the collection pit 15, respectively, and are used to discharge the steam condensate flowing out of the overflow port of the condensate tank 11. In this embodiment, the outlet of the overflow pipe 14 is inserted into the collection pit 15, and the liquid level of the wastewater stored in the collection pit 15 is at least 100 mm higher than the outlet level of the overflow pipe 14. The height of the outlet of the overflow pipe 14 from the bottom surface of the collection pit 15 can be set to 100 to 300 mm. The purpose of the above design is to use the water in the collection pit 15 to water seal the overflow pipe 14 and prevent the gas in the condensate tank 11 from being discharged from the collection pit 15 through the overflow pipe 14.

[0053] The condensation system 2 is connected to the hydrophobic storage system 1 and is used to condense the high-humidity gas output from the hydrophobic storage system 1 into saturated humid gas with low moisture content before outputting it. More specifically, the condensation system 2 includes: a spray tower 21, a packing layer 22, a demineralized water spray device 23, a metal wire mesh demister 24, and a fan 25. The spray tower 21 is located above the hydrophobic tank 11, and the spray tower 21 is connected to the gas outlet on the hydrophobic tank 11 through a flange. The high-humidity gas collected at the top of the hydrophobic tank 11 enters the bottom of the spray tower 21 through the gas outlet.

[0054] The packing layer 22 is disposed inside the spray tower 21 and located at the bottom of the spray tower 21. The packing layer 22 is made of structured metal packing. The demineralized water spraying device 23 is disposed inside the spray tower 21 and located above the packing layer 22. The demineralized water sprayed by the demineralized water spraying device 23 adheres to the surface of the packing layer 22. After the high-humidity gas enters the spray tower 21, it first contacts the packing layer 22 and directly contacts the demineralized water on the surface of the packing layer 22 for heat exchange. After the heat exchange and cooling, some of the water vapor in the high-humidity gas condenses into water droplets and is separated and removed from the high-humidity gas, thereby reducing the water vapor content in the high-humidity gas.

[0055] In the above technical solution, the demineralized water spraying device 23 includes: a demineralized water pipeline 231, a first nozzle 232, a second nozzle 233, a manual valve 234, a Y-type filter 235, an electric valve 236, and an electric regulating valve 237; wherein, the demineralized water pipeline 231 is made of stainless steel and is used to transport demineralized water to the spraying tower. The demineralized water pipeline 231 is provided with an inlet end, which is connected to the demineralized water supply equipment. The demineralized water pipeline 231 is provided with two outlet ends, which are located inside the spraying tower 21 and arranged vertically. The first nozzle 232 and the second nozzle 233 are respectively connected to the first nozzle 232 and the second nozzle 233; the spray tower 21 is equipped with two layers of spray, the first nozzle 232 and the second nozzle 233 spray downwards, the spray angle can be set between 60° and 90°, and the atomization pressure of the first nozzle 232 and the second nozzle 233 is 0.1 to 0.3 MPa; with the above design, the high humidity gas after being initially cooled and dehumidified by the packing layer 22 enters the middle spray zone of the spray tower 21, and directly contacts and exchanges heat with the atomized demineralized water droplets sprayed by the first nozzle 232 and the second nozzle 233, further reducing the temperature and humidity of the high humidity gas.

[0056] In the above technical solution, the manual valve 234, the Y-type filter 235, the electric valve 236, and the electric regulating valve 237 are all installed on the demineralized water pipeline 231; the manual valve 234 is used by the operator to manually control the on / off state of the demineralized water pipeline 231; the electric valve 236 is used by the operator to remotely control the on / off state of the demineralized water pipeline 231; the Y-type filter 235 is used to filter out impurities in the demineralized water to prevent the first nozzle 232 and the second nozzle 233 from becoming clogged; the electric regulating valve 237 is used to control and regulate the flow rate of the demineralized water in the demineralized water pipeline 231 according to the flow rate of the high-humidity gas in the spray tower 21.

[0057] As a preferred embodiment of this application, the demineralized water pipeline 231 is also equipped with a pressure gauge 238 and a flow meter 239.

[0058] The wire mesh demister 24 is installed inside the spray tower 21 and is located above the second nozzle 233. The saturated humid gas leaving the spray zone in the middle of the spray tower 21 passes through the wire mesh demister 24 to remove the carried mist droplets and is discharged from the top outlet of the spray tower 21. It can be understood that the demineralized water sprayed from the first nozzle 232 and the second nozzle 233 and the condensate formed by the condensation of the high-humidity gas fall directly back into the condensate tank 11. The steam condensate is demineralized water, and the cooling water sprayed by the demineralized water spray device 23 is also demineralized water. This ensures that the sprayed cooling water will not pollute the steam condensate in the condensate tank 11, so that the steam condensate can be directly recycled and reused in the future.

[0059] In this embodiment, the fan 25 is positioned above the spray tower 21 and is connected to the spray tower 21. As one implementation of this application, the fan 25 is a variable frequency centrifugal fan, and the fan 25 is directly connected to the motor without a coupling. The saturated humid gas discharged from the top outlet of the spray tower 21 directly enters the fan 25, and is discharged from the condensation system 2 after being pressurized by the fan 25.

[0060] The gas velocity inside spray tower 21 is designed to be 0.5 to 3 m / s, and the liquid-to-gas ratio is 2 to 6 L / Nm³. 3When the demineralized water spray device 23 is operating normally, first open the manual valve 234 on the demineralized water pipeline 24, then open the electric valve 236 and the electric regulating valve 237, and adjust the electric regulating valve 244 to the preset opening degree so that the demineralized water enters the first nozzle 232 and the second nozzle 233; at the same time, the blower 25 is set to the preset frequency and started; after the blower 25 is successfully put into operation, first adjust the frequency of the blower 25 according to the internal pressure value of the condensate tank 11 so that the top of the condensate tank 11 is kept in a slightly negative pressure state, that is, the pressure is 0 to -500Pa. After the entire condensing reheat gas whitening equipment is running smoothly, switch to closed-loop automatic control, that is, the frequency of the blower 25 is automatically adjusted according to the internal pressure value of the condensate tank 11; at the same time, the blower 25 controls and adjusts the humidity limit of the saturated humid gas at its outlet according to the ambient temperature, and the opening degree of the electric regulating valve 237 on the demineralized water pipeline 231 is automatically adjusted according to the humidity limit requirement of the saturated humid gas at the outlet of the blower 25.

[0061] The reheat device 3 is connected between the condensate storage system 1 and the condensate pipe, and is also connected to the condensation system 2. The reheat device 4 is used to cool the steam condensate output from the condensate pipe and input it into the condensate storage system 1. At the same time, it heats the saturated humid gas output from the condensation system 2 to form unsaturated high-temperature gas before discharging it. In this embodiment, the reheat device 3 adopts a vertically arranged shell-and-tube heat exchanger. The gas inlet of the reheat device 3 is connected to the exhaust port of the fan 25 through a duct. The liquid inlet of the reheat device 3 is connected to the condensate pipe, and the liquid outlet of the reheat device 3 is connected to the steam condensate input pipe 12 through a flange. When the reheat device 3 is actually running, the saturated humid gas output from the fan 25 enters the reheat device 3 through the duct and undergoes heat exchange in the shell side. The steam condensate output from the condensate pipe enters the reheat device 3 and undergoes heat exchange in the tube side. After the steam condensate has completed heat exchange, it leaves the reheat device 3 and enters the condensate storage system 1. More specifically, the saturated humid gas in the shell side of the reheat device 3 and the steam condensate in the tube side of the reheat device 3 exchange heat indirectly. The saturated humid gas is heated to form unsaturated high-temperature gas, which is then discharged to the outside through the gas outlet of the reheat device 3. The steam condensate output from the condensate drain pipe is cooled by heat exchange in the reheat device 3 before entering the steam condensate inlet pipe 12, which can effectively reduce the amount of water vapor generated by the flash evaporation of the steam condensate. As one embodiment of this application, the fan 25 can also be installed at the gas outlet of the reheat device 3.

[0062] This application provides a condensation-reheat type gas whitening device, which uses a spray tower 21 to directly condense the high-humidity gas discharged from the condensate tank 11, resulting in good heat exchange effect and low cost. After the saturated humid gas discharged from the spray tower 21 is cooled and dehumidified, it is pressurized by the fan 25 and enters the reheat device 3. In the reheat device 3, the high-temperature heat contained in the steam condensate is used to heat the saturated humid gas, turning it into an unsaturated high-temperature gas. The water vapor content of the unsaturated high-temperature gas has not reached a saturated state and does not have the conditions for rapid condensation to form water droplets. Therefore, the gas discharged outdoors will not produce obvious white fog. Furthermore, by using the saturated humid gas and the steam condensate to exchange heat in the reheat device 3, the temperature of the steam condensate entering the condensate tank 11 can be effectively reduced, thereby reducing the degree of flash evaporation of the steam condensate in the condensate tank 11.

[0063] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A condensation-reheat type gas whitening device, wherein the condensation-reheat type gas whitening device is connected to a drainage pipe, characterized in that, include: A hydrophobic storage system for storing steam condensate from a hydrophobic pipe and outputting high-humidity gas from the steam condensate; A condensation system, which is connected to the hydrophobic storage system, is used to condense the high-humidity gas output from the hydrophobic storage system into saturated humid gas before outputting it. A reheating device is connected between the hydrophobic storage system and the hydrophobic pipe, and is also connected to the condensation system. The reheating device is used to cool the steam condensate output from the hydrophobic pipe and input it into the hydrophobic storage system, while simultaneously heating the saturated humid gas output from the condensation system to form unsaturated high-temperature gas before discharging it.

2. The condensation-reheat type gas whitening device according to claim 1, characterized in that, The hydrophobic storage system includes: A condensate drain tank, the interior of which is a space for containing steam condensate; A distribution network is horizontally installed inside the drain tank and close to the bottom of the drain tank. A steam condensate inlet pipe is inserted into the condensate tank, and one end of the steam condensate inlet pipe is connected to the distribution network. A water collection pit is provided outside the condensate tank to collect steam condensate overflowing from the condensate tank; An overflow pipe is provided, with its two ends connected to the drainage tank and the water collection pit, respectively. The outlet of the overflow pipe is inserted into the water collection pit, and the liquid level of the wastewater stored in the water collection pit is at least 100 mm higher than the outlet level of the overflow pipe.

3. The condensation-reheat type gas whitening device according to claim 2, characterized in that, The condensation system includes: A spray tower is located above the condensate tank and is connected to the condensate tank. A packing layer is disposed inside the spray tower and located at the bottom of the spray tower. The packing layer is made of structured metal packing. A demineralized water spraying device is installed inside the spraying tower and located above the packing layer. The demineralized water spraying device is used to spray demineralized water to cool high-humidity gas. A metal wire mesh demister is installed inside the spray tower and located above the demineralized water spray device. The metal wire mesh demister is used to remove mist droplets carried in saturated humid gas. A fan is installed above and connected to the spray tower. The fan is used to pressurize the saturated humid gas and output it to the reheat device.

4. The condensation-reheat type gas whitening device according to claim 3, characterized in that, The reheating device employs a shell-and-tube heat exchanger. The gas inlet of the reheating device is connected to the fan, and the gas outlet of the reheating device is connected to the outside. The unsaturated high-temperature gas inside the reheating device is discharged to the outside along the shell side of the reheating device. The liquid inlet of the reheating device is connected to the condensate drain pipe, and the liquid outlet of the reheating device is connected to the steam condensate inlet pipe; the steam condensate in the reheating device is transported along the tube side of the reheating device to the steam condensate inlet pipe.

5. A condensation-reheat type gas whitening device according to claim 2, characterized in that, The distributed pipeline network includes: The main pipe has its end connected to the steam condensate inlet pipe. The bottom surface of the main pipe has a plurality of evenly spaced first small round holes along its axial direction. The first small round holes are used to discharge the steam condensate located in the main pipe. The top surface of the main pipe has a plurality of evenly spaced third small round holes along its axial direction. The third small round holes are used to discharge the water vapor located in the main pipe. A plurality of sub-tubes are connected to the main tube. The bottom surface of each sub-tube is provided with a plurality of evenly spaced second small circular holes along its axial direction. The second small circular holes are used to discharge steam condensate located in the sub-tube. The top surface of each sub-tube is provided with a plurality of evenly spaced fourth small circular holes along its axial direction. The fourth small circular holes are used to discharge water vapor located in the sub-tube.

6. A condensation-reheat type gas whitening device according to claim 3, characterized in that, The demineralized water spraying device includes: The demineralized water pipeline is provided with an inlet end and two outlet ends. The two outlet ends of the demineralized water pipeline are located inside the spray tower and are arranged vertically. The first nozzle and the second nozzle are respectively connected to the two discharge ends of the demineralized water pipe and are used to spray demineralized water downwards. A manual valve is installed on the demineralized water pipeline to control the on / off state of the demineralized water pipeline; A Y-type filter is installed on the demineralized water pipeline; An electric valve is installed on the demineralized water pipeline; An electric regulating valve is installed on the demineralized water pipeline and is used to regulate the flow rate of demineralized water in the demineralized water pipeline.

7. A condensation-reheat type gas whitening device according to claim 5, characterized in that, The operating level of the steam condensate in the condensate tank is at least 100 mm higher than the top level of the distribution network.

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