Steam condensate water draining and steam temperature reducing system and using method thereof

Abstract

The invention provides a steam condensate water draining and steam temperature reducing system and a using method thereof. The steam condensate water draining and steam temperature reducing system comprises a condensate water tank, and a liquid level meter is installed on the side portion of the condensate water tank; a vapor phase space used for gas-liquid separation is arranged in the condensate water tank, and a condensate water inlet in the top of the condensate water tank is connected with a generator water chamber or a steam heat exchanger outlet through a condensate water pipeline. A bottom condensate outlet connecting pipe of the condensate tank is connected with the condensate heat exchanger, a water outlet of the condensate heat exchanger is connected with a first water outlet pipeline and a second water outlet pipeline, and the first water outlet pipeline is connected with a two-way electric valve or a condensate pump in parallel. A temperature reduction water pump is connected to the second water outlet pipeline in series, and a temperature reduction device is connected to the tail end of the second water outlet pipeline and arranged at the steam inlet end of the steam pipeline. Smooth drainage can be achieved under the condition of steam inlet pressure fluctuation, and water attack hazards are avoided; long-distance and high-pressure conveying of condensate water can be achieved; the steam temperature reduction structure is simple, the cost is low, and the temperature reduction effect is good; the anti-pollution and anti-blocking capability is strong, and the reliability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial steam treatment, and in particular to a steam condensate drainage and steam temperature reduction system and a use method thereof. Background Art

[0002] Steam absorption heat pump units are widely used in power plant circulating water, exhaust steam, low-temperature waste heat recovery in industrial production, deep waste heat recovery from coal-fired power plants, and natural gas thermal utilization. Such units are usually driven by steam turbine heating extraction or boiler high-temperature superheated steam, and the low-temperature waste heat is recovered for central heating. The traditional steam condensate drainage method generally adopts a steam trap or orifice plate throttling method, but there are the following problems: 1. Poor regulation performance: When the unit changes working conditions, the steam inlet pressure and flow fluctuate greatly, and the regulation of the steam trap or orifice plate throttling is lagging or insufficient, resulting in poor drainage, which is easy to cause water accumulation and water hammer failure in front of the steam trap. 2. Condensate cannot be transported over long distances: The pressure after the steam trap is low, and the condensate can only be discharged to an open water tank at a lower position, which cannot achieve long-distance or high-pressure transportation. 3. High maintenance cost: For large-capacity units (such as condensate flow exceeding 20 tons / hour), the steam trap is expensive, the float structure is easily damaged, and the orifice plate is easily blocked by impurities such as rust slag, resulting in high operation and maintenance costs. 4. Steam desuperheating is complex: When superheated steam directly enters the lithium bromide heat pump unit, it will cause great corrosion to the heat transfer pipes and solution of the unit, and the heat transfer efficiency is low. The existing technology requires a separate desuperheating device, which has a complex structure and high cost, and also increases the requirements for cold water pipelines and antifreeze. Summary of the invention

[0003] The object of the present invention is to provide a steam condensate drainage and steam cooling system and a method of using the same, which can significantly improve the drainage efficiency, reduce the system complexity, ensure the safe and stable operation of the unit, and can effectively solve the problems of regulation lag, poor drainage, limited condensate transportation distance and complex steam cooling in traditional drainage methods, while reducing system costs, simplifying the structure, and improving operational stability.

[0004] According to one object of the present invention, the present invention provides a steam condensate drainage and steam temperature reduction system, comprising a condensate tank, a condensate heat exchanger and a temperature reduction device, wherein a liquid level gauge is installed on the side of the condensate tank; a vapor phase space for gas-liquid separation is arranged inside the condensate tank, a condensate inlet and a balanced ventilation interface are arranged on the top of the condensate tank, the condensate inlet is connected to a generator water chamber or a steam heat exchanger outlet through a condensate pipeline, the inlet of the generator water chamber or the steam heat exchanger is connected to a steam pipeline, and the balanced ventilation interface is connected to the generator water chamber or the steam heat exchanger through a ventilation pipe;

[0005] A condensate outlet pipe is provided at the bottom of the condensate tank, and the condensate outlet pipe is connected to the condensate heat exchanger. The water outlet of the condensate heat exchanger is respectively connected to the first water outlet pipeline and the second water outlet pipeline. A two-way electric valve or a condensate pump is connected in parallel to the first water outlet pipeline; a cooling water pump is connected in series to the second water outlet pipeline, and a cooling device is connected to the end of the second water outlet pipeline. The cooling device is arranged at the steam inlet end of the steam pipeline.

[0006] Furthermore, the condensate heat exchanger is a shell and tube heat exchanger, a fully welded plate heat exchanger or a brazed heat exchanger, which is used to reduce the condensate temperature to below 100°C. The cooling medium is a dilute solution from the absorber or hot network water, and the inlet and outlet of the condensate heat exchanger are provided with a stop valve, a filter and a bypass pipe.

[0007] Furthermore, the two-way electric valve is used to transport condensate to an open water tank. When the drain outlet pressure is low, the liquid level gauge controls the liquid level height of the condensate tank by adjusting the opening of the two-way electric valve. In long-distance or high-pressure transportation scenarios, the condensate is transported to the open water tank through the condensate pump.

[0008] Furthermore, the condensate pump adopts variable frequency control and adjusts the output frequency according to the liquid level change of the liquid level meter, so as to transport the condensate to a long distance or a high-pressure closed water tank, and the condensate pump supports a multiple-in-one-standby or one-in-one-standby standby pump configuration.

[0009] Furthermore, the desuperheating water pump is used to take water from the outlet of the condensate heat exchanger and send the pressurized low-temperature condensate into the desuperheating device through a pipeline. A stop valve, a filter and a check valve are arranged before and after the desuperheating water pump to improve the stability and reliability of the system operation.

[0010] Furthermore, the cooling device includes at least one atomizing nozzle, which atomizes the low-temperature condensate and sprays it into the superheated steam, thereby reducing the temperature of the superheated steam to a saturation temperature close to its corresponding pressure through direct contact heat exchange between the condensate particles and the steam.

[0011] Furthermore, the desuperheating water pump supports variable frequency control, and adjusts the output frequency of the desuperheating water pump by detecting the steam temperature after desuperheating in real time, so as to achieve an accurate steam desuperheating effect.

[0012] Furthermore, the bottom of the condensate tank is provided with a drain pipe and a drain valve for removing rust or welding slag carried in the steam pipeline.

[0013] According to another object of the present invention, the present invention provides a method for using the above-mentioned steam condensate drain and steam temperature reduction system, comprising the following steps:

[0014] S1. Condensate treatment process:

[0015] Steam condensate enters the condensate tank through a pipe from the generator water chamber of the steam heat pump or the outlet of the steam heat exchanger. The level meter monitors the liquid level in the condensate tank in real time and controls the operation of the two-way electric valve or the condensate pump to ensure the stability of the liquid level in the condensate tank. The two-way electric valve is used to transport the condensate to the open water tank. When the drain outlet pressure is low, the level meter controls the liquid level of the condensate tank by adjusting the opening of the two-way electric valve. In long-distance or high-pressure transportation scenarios, the condensate is transported to the open water tank through the condensate pump.

[0016] S2, cooling process:

[0017] The low-temperature condensate in the second water outlet pipeline led out from the outlet of the condensate heat exchanger is pressurized by a desuperheating water pump and sent to the desuperheating device. An atomizing nozzle is arranged in the desuperheating device. The condensate is sprayed into the superheated steam and is heated and evaporated, while the steam temperature is reduced to close to its saturation temperature.

[0018] Furthermore, in S2, the low-temperature condensate in the first water outlet pipeline led out from the outlet of the condensate heat exchanger is discharged from the condensate outlet by controlling the operation of the two-way electric valve or the condensate pump to ensure the stability of the liquid level in the condensate tank.

[0019] The technical solution of the present invention can still achieve smooth drainage under the condition of steam inlet pressure fluctuation and avoid water hammer hazards; it can realize long-distance and high-pressure transportation of condensed water; the steam cooling structure is simple, the cost is low, and the cooling effect is good; the system has strong anti-fouling and clogging capabilities and high operational reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 Schematic diagram of the structure of the system of the embodiment of the present invention.

[0022] In the figure: 1. Condensate tank; 2. Liquid level gauge; 3. Condensate heat exchanger; 4. Two-way electric valve; 5. Condensate pump; 6. Cooling water pump; 7. Cooling device. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. 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, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Example 1

[0027] like Figure 1 As shown,

[0028] A steam condensate drainage and steam temperature reduction system comprises a condensate tank 1, a condensate heat exchanger 3, a temperature reduction device 7 and internally connected pipes, valves, filters and other components, wherein:

[0029] A condensate inlet is provided at the top of the condensate tank 1, and the condensate inlet is connected to the generator water chamber or the steam heat exchanger outlet through a condensate pipe, and the generator water chamber or the steam heat exchanger inlet is connected to the steam pipeline;

[0030] A vapor phase space is provided at the top of the condensate tank 1 for gas-liquid separation; a balanced ventilation interface is provided at the top of the condensate tank, and the balanced ventilation interface is connected to the generator water chamber or the steam heat exchanger through a ventilation pipe.

[0031] The condensate tank 1 is connected to a liquid level meter 2, which is used to monitor the liquid level inside the condensate tank and control the operation of the drain device.

[0032] A condensate outlet pipe is provided at the bottom of the condensate tank 1, and the condensate outlet pipe is connected to the condensate heat exchanger 3, and the water outlet of the condensate heat exchanger 3 is connected to the first water outlet pipeline and the second water outlet pipeline respectively.

[0033] A two-way electric valve 4 or a condensate pump 5 is connected in parallel to the first water outlet pipeline, and the liquid level in the condensate tank is ensured to be stable by controlling the operation of the two-way electric valve 4 or the condensate pump 5.

[0034] A cooling water pump 6 is connected in series on the second water outlet pipeline, and a cooling device 7 is connected to the end of the second water outlet pipeline. The cooling device 7 is arranged at the steam inlet end of the steam pipeline. An atomizing nozzle is arranged in the cooling device 7, and the condensed water is heated and evaporated after being sprayed into the superheated steam, while the steam temperature is reduced to close to its saturation temperature.

[0035] The system of the present invention connects the above components through pipelines and valves, and can achieve drainage of steam condensate, gas-liquid separation, temperature reduction and long-distance transportation after temperature reduction.

[0036] In this embodiment, the condensate heat exchanger 3 is a shell and tube heat exchanger, a fully welded plate heat exchanger or a brazed heat exchanger, which is used to reduce the condensate temperature to below 100°C. The cooling medium is a dilute solution from the absorber or hot network water, and the inlet and outlet of the condensate heat exchanger are provided with a stop valve, a filter and a bypass pipe.

[0037] In this embodiment, filters, stop valves and check valves are installed at the inlet and outlet of the condensate heat exchanger 3, the desuperheating water pump 6 and the front and rear of the condensate pump 5 to facilitate equipment maintenance and sewage discharge;

[0038] In this embodiment, the condensate pump 5 can be used in the form of multiple use and one standby or one use and one standby to improve the reliability of system operation;

[0039] In this embodiment, the two-way electric valve is equipped with a bypass pipe and a manual valve to ensure the drainage function during maintenance.

[0040] In this embodiment, the liquid level meter can be in the form of a magnetic flap, differential pressure, guided wave radar, etc., which is used to monitor the liquid level of the condensate tank and control the operation of the two-way electric valve or the condensate pump.

[0041] In this embodiment, the two-way electric valve 4 or the condensate pump 5 is selected to drain water according to the condensate delivery position and pressure requirements to ensure automatic liquid level control and condensate delivery stability. The desuperheating water pump 6 draws a path of low-temperature condensate from the outlet of the condensate heat exchanger 3, and after pressurization, it is sent to the desuperheating device 7 at the inlet of the steam generator through a pipeline; the desuperheating device 7 includes an atomizing nozzle, which atomizes the low-temperature condensate sent by the desuperheating water pump and sprays it into the superheated steam. After direct contact with the steam, it absorbs heat and evaporates, thereby reducing the steam temperature to the saturation temperature.

[0042] In this embodiment, the condensate tank 1 has a simple structure, low cost, and is resistant to dirt and blockage. Even if there are impurities such as welding slag and rust slag in the steam pipeline, they can be deposited at the bottom of the condensate tank and discharged through the drain valve, and the upper vapor phase space and the lower liquid level can easily separate steam and water, preventing the formation of plunger flow in the pipeline, resulting in poor drainage and water hammer failure; the two-way electric valve or condensate pump is set after the condensate heat exchanger, the condensate temperature is low, and the temperature resistance requirement is low, which reduces its cost and improves its use conditions. Using the condensate after cooling, adding a cooling water pump and a cooling device, using the cooling water pump to pressurize part of the condensate and then spraying it through the atomizing nozzle in the cooling device to form fine particles and superheated steam cooling, the principle and structure are simple, the control is convenient, the cost is low, the system is simplified, and the safe operation of the steam-type lithium bromide absorption heat pump unit is also guaranteed.

[0043] The steam condensate draining and steam temperature reduction system of the present invention comprises the following steps when in use:

[0044] 1. Condensate treatment process:

[0045] Steam condensate enters the condensate tank 1 through a pipe from the generator water chamber of the steam type heat pump or the outlet of the steam heat exchanger. A vapor phase space is provided at the top of the condensate tank 1 for gas-liquid separation. The liquid level meter 2 monitors the liquid level in the condensate tank in real time and ensures the stability of the liquid level in the condensate tank by controlling the operation of the two-way electric valve 4 or the condensate pump 5. The two-way electric valve is used to transport the condensate to the open water tank. When the drain outlet pressure is low, the liquid level meter controls the liquid level of the condensate tank by adjusting the opening of the two-way electric valve; in the long-distance or high-pressure transportation scenario, the condensate is transported to the open water tank by the condensate pump.

[0046] 2. Cooling process:

[0047] The low-temperature condensate in the second outlet pipe from the outlet of the condensate heat exchanger 3 is pressurized by the desuperheating water pump 6 and sent to the desuperheating device 7. The desuperheating device 7 is provided with an atomizing nozzle. The condensate is heated and evaporated after being sprayed into the superheated steam, and the steam temperature is reduced to close to its saturation temperature. This process does not require additional cooling water, and the heat is fully utilized.

[0048] At the same time, the low-temperature condensate in the first water outlet pipeline led out from the outlet of the condensate heat exchanger 3 is discharged from the condensate outlet by controlling the operation of the two-way electric valve 4 or the condensate pump 5 to ensure the stability of the liquid level in the condensate tank.

[0049] Specifically, when the present invention is used:

[0050] After the steam condensate is discharged from the water chamber of the generator, it is connected to the condensate tank 1 below through a thicker pipe. The steam condensate flows in the condensate outlet pipe in a partially full pipe. This pipe is designed for partially full pipe flow and has a low flow rate. A liquid level gauge 2 is installed on the condensate tank 1. The space above the condensate tank 1 is a vapor phase space. This space is used to achieve gas-liquid separation to prevent steam from flowing out, and also to achieve partially full pipe flow between the generator heat transfer pipe and the water chamber and the condensate tank, avoiding water hammer hazards.

[0051] The condensate outlet pipe of the condensate tank 1 is close to the bottom and below the lowest controlled liquid level, ensuring that the condensate flowing out of the condensate tank is liquid condensate; after the condensate leaves the condensate tank 1, it enters the condensate heat exchanger 3, where it can exchange heat with the lithium bromide solution or medium-temperature hot network water from the absorber, reducing the condensate temperature to below 100°C and turning it into supercooled water under the corresponding pressure, thereby avoiding vaporization due to decompression during the delivery process or generating a large amount of water vapor when entering an open water tank connected to the atmosphere.

[0052] After the condensate leaves the condensate heat exchanger 3,

[0053] A two-way electric valve 4 or a condensate pump 5 can be connected, and the liquid level gauge 2 installed on the condensate tank 1 can be used to adjust the opening of the two-way solenoid valve 4 or the frequency of the condensate pump 5 according to the set liquid level height to achieve automatic control of the liquid level; the two-way electric valve 4 method is suitable for occasions where the steam condensate outlet pressure is low, such as discharging condensate into the ground or an open water tank placed underground, while the condensate pump 5 method is suitable for transporting steam condensate to a closed container that is farther away, higher in position or at a higher pressure. Specifically: when the system condensate recovery device is near the unit and is on the ground or underground, and it is an open water tank, the two-way electric valve 4 + liquid level gauge 2 can be used to control the condensate drainage. The two-way electric valve 4 adjusts the opening according to the liquid level set by the liquid level gauge 2, which can not only stably control the liquid level in the condensate tank, but also smoothly transport the condensate to the system condensate recovery device; when the system condensate recovery device is far away from the unit or at a high height or is a closed water tank with pressure requirements, the condensate pump 5 + liquid level gauge 2 can be used to control the condensate drainage. The condensate pump 5 adjusts the output frequency according to the liquid level set by the liquid level gauge 2, which can not only stably control the liquid level in the condensate tank, but also smoothly transport the condensate to the system condensate recovery device.

[0054] This method can overcome the problem of poor drainage when the steam inlet pressure changes due to operating conditions, which leads to water hammer and even inability of steam to condense in the generator heat transfer tube. It can adapt to all operating conditions. Secondly, this method can realize the long-distance, large height difference or high pressure difference transportation of condensed water. Thirdly, compared with the steam trap, this combination has a simple structure and low cost.

[0055] In order to solve the problem of cooling the superheated steam, a low-temperature condensate is led out from the pipeline between the condensate outlet condensate heat exchanger 3 and the two-way electric valve 4 or the condensate pump 5, and is pressurized by the cooling water pump 6 and sent to the cooling device 7 at the generator inlet position (generally placed after the steam regulating valve) through the connecting pipeline to cool the superheated steam. An atomizing nozzle is installed in the cooling device 7. After being sprayed out from the nozzle, the condensate becomes fine particles and directly contacts the superheated steam. Some particles are heated by the superheated steam and evaporated into water vapor, and the superheated steam is cooled to a saturation temperature close to its corresponding pressure. The evaporated water vapor enters the generator tube bundle together with the steam to condense and exchange heat.

[0056] In this cooling method, since the cooling water pump 6 takes water from the condensate tank 1 and the condensate heat exchanger 3, firstly, the water temperature is reduced. Compared with the pressure of the condensate here, the condensate is in a supercooled state. The condensate entering the cooling water pump 6 will not vaporize and cause cavitation, and the condensate with a lower temperature is more beneficial to the temperature resistance of the sealing material of the cooling water pump and the heat dissipation of the motor. Secondly, low-temperature water has a good cooling effect on superheated steam. Thirdly, after the cooling water pump 6 is installed in the condensate tank 1 and the condensate heat exchanger 3, the volume of water at the water intake point is large, and the cooling water pump 6 is not easy to suck empty, and the operation is more stable. In addition, the principle and structural composition of this cooling method are simple, the control is convenient, the cost is very low, and it is particularly suitable for large steam absorption heat pumps or refrigerators.

[0057] The present invention provides an efficient, stable and low-cost solution by integrating condensate drainage and steam temperature reduction technology, which is particularly suitable for large steam absorption heat pumps and refrigeration units and has broad industrial application prospects.

[0058] The present invention can still achieve smooth drainage under the condition of fluctuating steam inlet pressure, avoid water hammer hazards, and realize long-distance, high-pressure transportation of condensate; the steam cooling structure is simple, the cost is low, and the cooling effect is good; the system has strong anti-fouling and blocking ability and high operating reliability. The present invention adopts the vapor phase space and liquid level monitoring design of the condensate tank to achieve gas-liquid separation and effectively avoid water hammer and poor drainage problems. Select a two-way electric valve or condensate pump as needed to adapt to condensate recovery scenarios with different pressure and distance conditions. Use low-temperature condensate to achieve superheated steam cooling, avoid the additional introduction of cooling water, and simplify the design of the cooling device, reducing system complexity and cost. The condensate tank and heat exchanger have filtering, sedimentation and sewage discharge functions to avoid the influence of impurities in the steam pipeline on the operation of the system. Automatic control: Through the control of the liquid level meter and the variable frequency pump, the system operation is automatically adjusted to improve the reliability and stability of the equipment operation.

[0059] 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A steam condensate drainage and steam temperature reduction system, characterized in that: It includes a condensate tank, a condensate heat exchanger and a temperature reduction device. A liquid level gauge is installed on the side of the condensate tank. A vapor phase space for gas-liquid separation is arranged inside the condensate tank. A condensate inlet and a balanced ventilation interface are arranged on the top of the condensate tank. The condensate inlet is connected to the generator water chamber or the steam heat exchanger outlet through a condensate pipeline. The inlet of the generator water chamber or the steam heat exchanger is connected to the steam pipeline. The balanced ventilation interface is connected to the generator water chamber or the steam heat exchanger through a ventilation pipe. A condensate outlet pipe is provided at the bottom of the condensate tank, and the condensate outlet pipe is connected to the condensate heat exchanger. The water outlet of the condensate heat exchanger is respectively connected to the first water outlet pipeline and the second water outlet pipeline. A two-way electric valve or a condensate pump is connected in parallel to the first water outlet pipeline; a cooling water pump is connected in series to the second water outlet pipeline, and a cooling device is connected to the end of the second water outlet pipeline. The cooling device is arranged at the steam inlet end of the steam pipeline.

2. The steam condensate draining and steam temperature reduction system according to claim 1, characterized in that: The condensate heat exchanger is a shell and tube heat exchanger, a fully welded plate heat exchanger or a brazed heat exchanger, which is used to reduce the condensate temperature to below 100°C. The cooling medium is a dilute solution from the absorber or hot network water, and the inlet and outlet of the condensate heat exchanger are provided with a stop valve, a filter and a bypass pipe.

3. The steam condensate draining and steam temperature reduction system according to claim 1, characterized in that: The two-way electric valve is used to transport condensate to an open water tank. When the drain outlet pressure is low, the liquid level gauge controls the liquid level of the condensate tank by adjusting the opening of the two-way electric valve. In long-distance or high-pressure transportation scenarios, the condensate is transported to the open water tank through the condensate pump.

4. The steam condensate draining and steam temperature reduction system according to claim 1, characterized in that: The condensate pump adopts frequency conversion control and adjusts the output frequency according to the liquid level change of the liquid level meter, so as to transport the condensate to a long distance or a high-pressure closed water tank, and the condensate pump supports a multiple-in-one-standby or one-in-one-standby standby pump configuration.

5. The steam condensate draining and steam temperature reduction system according to claim 1, characterized in that: The desuperheating water pump is used to take water from the outlet of the condensate heat exchanger and send the pressurized low-temperature condensate into the desuperheating device through a pipeline. A stop valve, a filter and a check valve are arranged before and after the desuperheating water pump to improve the stability and reliability of the system operation.

6. The steam condensate draining and steam temperature reduction system according to claim 1, characterized in that: The cooling device includes at least one atomizing nozzle, which atomizes low-temperature condensate and sprays it into superheated steam, thereby reducing the temperature of the superheated steam to a saturation temperature close to its corresponding pressure through direct contact heat exchange between condensate particles and steam.

7. The steam condensate draining and steam temperature reduction system according to claim 1, characterized in that: The desuperheating water pump supports variable frequency control, and adjusts the output frequency of the desuperheating water pump by real-time detection of the steam temperature after desuperheating, so as to achieve an accurate steam desuperheating effect.

8. The steam condensate draining and steam temperature reduction system according to claim 1, characterized in that: The bottom of the condensate tank is equipped with a drain pipe and a drain valve for removing rust or welding slag carried in the steam pipeline.

9. The method for using the steam condensate drain and steam temperature reduction system according to claim 1, characterized in that: The steps include: S1. Condensate treatment process: Steam condensate enters the condensate tank through a pipe from the generator water chamber of the steam heat pump or the outlet of the steam heat exchanger. The level meter monitors the liquid level in the condensate tank in real time and controls the operation of the two-way electric valve or the condensate pump to ensure the stability of the liquid level in the condensate tank. The two-way electric valve is used to transport the condensate to the open water tank. When the drain outlet pressure is low, the level meter controls the liquid level of the condensate tank by adjusting the opening of the two-way electric valve. In long-distance or high-pressure transportation scenarios, the condensate is transported to the open water tank through the condensate pump. S2, cooling process: The low-temperature condensate in the second water outlet pipeline led out from the outlet of the condensate heat exchanger is pressurized by a desuperheating water pump and sent to the desuperheating device. An atomizing nozzle is arranged in the desuperheating device. The condensate is sprayed into the superheated steam and is heated and evaporated, while the steam temperature is reduced to close to its saturation temperature.

10. The method for using the steam condensate drain and steam desuperheating system according to claim 9, characterized in that: In S2, the low-temperature condensate in the first outlet pipe drawn from the outlet of the condensate heat exchanger is discharged from the condensate outlet by controlling the two-way electric valve or the operation of the condensate pump to ensure the stability of the liquid level in the condensate tank.

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