A condensate recovery system

Abstract

The utility model relates to the technical field of condensate water recovery, specifically relates to a condensate water recovery system, the condensate water recovery system includes condensate water recovery unit, conveying unit and temperature regulation unit, condensate water recovery unit is used to be connected with the steam seal cooler of steam drive compressor, to collect the condensate water that steam seal cooler discharged, conveying unit intercommunication condensate water recovery unit and the target utilization equipment of open system, temperature regulation unit is used to the condensate water temperature control between condensate water recovery unit with target utilization equipment, the condensate water recovery system provided by the utility model can reduce or avoid the steam seal condensate water of steam drive compressor direct discharge, thereby reduce the waste of resources and the influence to the environment.

Description

Technical Field

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

[0002] During operation, steam-driven compressors generate high-temperature condensate in the steam seal cooler. Traditionally, this condensate is directly discharged into the initial rainwater system or sewage system. As the unit operates for a long time, the amount of water discharged into the sewage system is large, which increases the cost of sewage treatment.

[0003] Steam-driven compressor condensate, also known as turbine condensate, is expensive but produced in small quantities, making its recovery difficult. Existing technologies attempt to recover condensate through closed-loop water systems, but this requires high-pressure pumps, sealed containers, and other equipment, resulting in high investment costs and poor system compatibility. Furthermore, direct discharge of high-temperature condensate (which typically carries steam) can damage the plant environment and compromise operational safety. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a condensate recovery system that can reduce or avoid the direct discharge of steam-driven compressor condensate, thereby reducing resource waste and environmental impact.

[0005] To achieve the above and other related objectives, this utility model provides a condensate recovery system, comprising:

[0006] A condensate recovery unit is used to connect to the steam seal cooler of a steam-driven compressor to collect the condensate discharged from the steam seal cooler;

[0007] The conveying unit connects the condensate recovery unit and the target utilization device for the open system;

[0008] A temperature control unit is used to adjust the temperature of the condensate between the condensate recovery unit and the target utilization device.

[0009] In one embodiment of this utility model, the condensate recovery unit includes an atmospheric pressure vessel and a recovery pipe, and the atmospheric pressure vessel is connected to the steam seal cooler through the recovery pipe.

[0010] In one embodiment of the present invention, the conveying unit includes a conveying pump and a conveying pipe connected to the conveying pump.

[0011] In one embodiment of this utility model, the target utilization device is an open system used in or in conjunction with a steam-driven compressor, and the open system includes at least one of a water tank container, a cooling tower, and an evaporative condenser that are connected to the atmosphere.

[0012] In one embodiment of this utility model, the temperature of the condensate delivered to the water tank container is as low as 45°C.

[0013] In one embodiment of this utility model, the target utilization device is an external device of a steam-driven compressor, and the external device is a thermal energy utilization device or a water resource utilization device.

[0014] In one embodiment of the present invention, the condensate recovery system further includes a control unit, which includes a temperature detection device and a controller;

[0015] The temperature detection device is installed at the outlet of the temperature regulating unit or on the conveying unit. The temperature detection device is electrically connected to the controller and is used to adjust the flow rate of the temperature regulating medium to dynamically control the condensate temperature.

[0016] In one embodiment of this utility model, the control unit further includes a flow regulating valve and a pressure sensor. The controller adjusts the opening degree of the flow regulating valve or the speed of the conveying pump of the conveying unit according to the condensate temperature and pressure signals.

[0017] In one embodiment of this utility model, the temperature regulating unit is a heat exchanger, and the heat exchanger includes a heat exchange tube through which a cooling medium flows.

[0018] The heat exchange tube is immersed in the condensate recovery unit, or is installed on the delivery pipe, or is covered on the outer surface of the delivery pipe.

[0019] In one embodiment of this utility model, the top of the water tank container is provided with a steam recovery device for collecting the steam volatilized from the condensate and condensing it for reuse.

[0020] In summary, this invention leverages the open nature of air-cooled water tanks and cooling towers, which are connected to the atmosphere. It uses a condensate recovery unit, such as an atmospheric pressure vessel, to temporarily store condensate, reducing sealing requirements. Simultaneously, through heat exchange in the temperature control unit or natural heat dissipation, the condensate temperature is reduced to a level acceptable for the open system, preventing steam evaporation and equipment damage caused by high temperatures. This eliminates the need for high-pressure pumps and sealed containers required in traditional closed systems, significantly reducing investment costs. It not only solves the safety hazards of steam diffusion caused by direct discharge of high-temperature condensate and improves the operating environment, but also allows condensate to be used as makeup water for the air-cooled system, replacing demineralized water and achieving resource conservation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the condensate recovery system in one embodiment of the present invention;

[0023] Component designation: Steam seal cooler 100, condensate recovery unit 10, atmospheric pressure vessel 11, recovery pipe 12, conveying unit 20, conveying pump 21, conveying pipe 22, valve 23, temperature control unit 30, heat exchanger 31, cooling medium inlet 311, cooling medium outlet 312, target utilization equipment 200. Detailed Implementation

[0024] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0025] Please see Figure 1 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this utility model.

[0026] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in this invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, devices, and materials similar to or equivalent to those described, used, or made of materials in the embodiments of this invention.

[0027] A steam-driven compressor is a mechanical device that uses steam as a power source to compress gas through thermal drive. It mainly consists of a steam turbine and a compressor body coupled together. Its working principle is as follows: High-pressure steam first enters the steam turbine, where it is depressurized and accelerated through nozzles, converting the steam's thermal energy into the kinetic energy of a high-speed airflow. This high-speed airflow drives the turbine impeller to rotate, which in turn drives the compressor impeller, which is coaxially connected to the turbine. The compressor impeller performs work on the gas through its blades, giving the gas kinetic energy. The gas then enters the compressor's diffuser and volute, where the kinetic energy is gradually converted into pressure energy, ultimately achieving pressurized gas delivery. After performing work in the turbine, the steam is typically discharged into a gas-sealed condenser to condense into condensate. The entire process drives the compressor through the energy conversion of steam.

[0028] A steam seal cooler 100 is a device that controls the operating temperature of a compressor shaft seal by circulating a cooling medium (usually water or cooling gas). It is generally installed at the shaft end seal position of a steam-driven compressor to reduce the risk of seal overheating due to high-temperature steam leakage, while preventing steam from leaking directly into the external environment or lubrication system, thus maintaining the sealing performance and safety of the compressor operation.

[0029] The temperature of the condensate in the steam seal of a steam-driven compressor is generally between 80°C and 130°C.

[0030] An open system is a system that exchanges matter and energy with the external environment. Such systems do not have strict boundary restrictions and allow matter (such as gas, liquid or solid) to flow in or out, while exchanging energy with the outside world in the form of heat, work and other forms.

[0031] A closed system generally refers to a system that allows only energy exchange but prohibits the exchange of matter. Its boundary is a barrier to matter, but heat or work can be transferred through the boundary. The boundary of the system does not allow the input or output of matter, but its interior can exchange energy forms such as heat and work with the outside world. For example, a sealed pressure vessel containing gas, if it exchanges heat with the outside world through heating or cooling, but the mass of the gas remains unchanged, is a closed system.

[0032] Please see Figure 1This utility model provides a condensate recovery system, including a condensate recovery unit 10, a conveying unit 20 and a temperature regulation unit 30;

[0033] The condensate recovery unit 10 is connected to the steam seal cooler 100 of the steam-driven compressor to collect the condensate discharged from the steam seal cooler 100; the conveying unit 20 connects the condensate recovery unit 10 and the target utilization device 200, which is an open system; the temperature regulating unit 30 is used to regulate the temperature of the condensate between the condensate recovery unit 10 and the target utilization device 200.

[0034] It should be noted that the condensate recovery system proposed in this utility model solves the resource waste and environmental problems caused by the direct discharge of high-temperature condensate in traditional processes. The condensate recovery unit 10 can safely contain and pre-treat high-temperature condensate. Its specific implementation is not limited to the atmospheric pressure container 11, but can also use storage tanks or graded sedimentation tanks with buffer structures. For example, stainless steel containers are suitable for corrosive environments, fiberglass containers are suitable for lightweight applications, and composite containers with built-in filters can simultaneously intercept impurities. The conveying unit 20 serves as a channel connecting the recovery unit and the target utilization device 200. Its implementation includes, but is not limited to, a combination of corrosion-resistant centrifugal pumps and pipelines, or a gravity flow system or pneumatic conveying device. For example, using stainless steel pipelines with polytetrafluoroethylene lining can extend service life, while frequency-controlled screw pumps can adapt to operating conditions with large flow fluctuations. The purpose of setting up the temperature regulation unit 30 is to balance the compatibility between condensate and the open system. It can include an active heat exchanger 31 (such as a plate heat exchanger 31 that uses circulating cooling water for forced cooling), or a passive heat dissipation device (such as extending the pipeline route and combining heat dissipation fins to achieve natural cooling). It can also transfer the heat energy of high-temperature condensate to other process links through the waste heat recovery module, thereby realizing the cascade utilization of energy.

[0035] This solution leverages the low investment advantages of an open system and the synergistic effect of dynamic temperature control. Traditional closed systems rely on complex equipment to maintain pressure balance, while this solution significantly reduces sealing requirements by utilizing the open system's (such as a water tank or cooling tower) connectivity with the atmosphere. Only an atmospheric pressure container 11 is needed for condensate storage. Simultaneously, the temperature control unit 30 lowers the condensate temperature to a level acceptable for the open system through heat exchange or natural heat dissipation, preventing steam evaporation or thermal stress damage to equipment caused by high temperatures. For example, before the condensate enters the water tank, it exchanges heat with the circulating cooling water in a reverse manner via a plate heat exchanger 31, ensuring that the makeup water temperature matches the water tank's operating conditions while avoiding additional energy consumption.

[0036] In terms of technical benefits, this system eliminates the need for high-pressure pumps and sealed containers required for traditional closed-loop recycling by introducing an open system, significantly reducing investment costs. Secondly, the temperature control unit 30 effectively solves the problem of steam diffusion caused by direct discharge of high-temperature condensate, improving the on-site operating environment and reducing safety hazards. Finally, condensate is used as makeup water for the air-cooled system, replacing demineralized water, saving tens of thousands of tons of high-purity water resources annually while reducing oily wastewater discharge, achieving a dual improvement in environmental and economic benefits. Furthermore, the system's modular design allows for flexible adaptation to different compressor models and various open system types, possessing broad industrial application potential.

[0037] As an optional embodiment of this case, the condensate recovery system further includes a control unit, which includes a temperature detection device and a controller;

[0038] The temperature detection device is installed at the outlet of the temperature regulation unit 30 or on the conveying unit 20 and is connected to the controller signal to adjust the flow rate of the temperature regulating medium to dynamically control the condensate temperature.

[0039] It should be noted that the control unit controls the condensate temperature by dynamically adjusting the flow rate of the temperature-regulating medium, and includes a temperature detection device and a controller. The temperature detection device can be a thermocouple (such as an OMEGA T-type thermocouple), an infrared temperature sensor (such as the FLIR A300 series), or a resistance temperature detector (such as PT100), installed at the outlet of the temperature regulation unit 30 or at key nodes of the delivery pipe 22, to monitor changes in condensate temperature in real time. The controller uses an industrial-grade PLC (such as a Siemens S7-1200) or a dedicated temperature control module (such as an Omron E5CC), which, through linkage with a regulating valve (such as a Festo VUVG series) or a variable frequency pump (such as a Grundfos CR series), dynamically adjusts the cooling water or air flow rate to ensure that the condensate temperature remains stable within the target range.

[0040] When the temperature detection device detects that the condensate temperature exceeds the set threshold, the controller compares the deviation between the actual temperature and the target value, generates an adjustment signal, and drives the actuator (such as a regulating valve or variable frequency pump) to change the flow rate or velocity of the temperature-regulating medium (cooling water, air, etc.), thereby controlling the heat exchange efficiency of the heat exchanger 31 or the heat dissipation device. For example, in the plate heat exchanger 31, increasing the cooling water flow rate can improve the effective utilization rate of the heat exchange area and accelerate the cooling of the condensate; while in natural heat dissipation scenarios, adjusting the fan speed or the angle of the heat dissipation fins can optimize the convective heat dissipation effect. Through real-time closed-loop control, the system can adapt to fluctuations in operating conditions (such as changes in condensate flow rate and ambient temperature fluctuations) and maintain temperature stability.

[0041] By implementing a control unit, the problem of condensate temperature fluctuations caused by the lack of dynamic temperature control in traditional open systems is effectively solved. Directly feeding high-temperature condensate into the water tank can lead to steam evaporation, thermal expansion of the tank, or microbial growth, while static temperature control solutions (such as fixed-flow cooling) are ill-suited to complex operating conditions. By dynamically adjusting the flow rate of the temperature-regulating medium, the system can match the heat dissipation requirements under different environments, avoiding the negative impacts of excessively high or low temperatures on the open system. The control unit significantly improves the reliability and energy efficiency of the recovery system: Firstly, improved temperature stability enhances the compatibility of water replenishment in the water tank, reducing scaling or corrosion caused by temperature differences; secondly, dynamic adjustment reduces excessive consumption of cooling media (such as circulating water), achieving energy savings; and thirdly, automated control reduces human intervention and the risk of operational errors, making it particularly suitable for fields with stringent safety requirements, such as petrochemicals and power generation.

[0042] As an optional embodiment of this case, the control unit further includes a flow regulating valve and a pressure sensor, both of which are electrically connected to the controller; the controller adjusts the opening degree of the flow regulating valve or the rotation speed of the delivery pump 21 of the delivery unit 20 according to the condensate temperature and pressure signals.

[0043] It should be noted that the control unit integrates a flow regulating valve and a pressure sensor, enabling more precise control of the condensate delivery process and effectively solving the problems of equipment loss and low energy efficiency caused by pressure fluctuations and temperature instability in traditional open systems. The main function of the flow regulating valve is to dynamically adjust the flow rate of the temperature regulating medium (such as cooling water or air). Specific implementations include, but are not limited to, pneumatic regulating valves (such as Festo VUVG-L series), electric proportional valves (such as Siemens SKD62), or self-operated pressure balancing valves (such as the ZJHP valve). Electric valves are suitable for remote control requirements, while self-operated valves can achieve flow stability without external energy. The pressure sensor is used to monitor pressure changes in the delivery pipe 22 or heat exchanger 31 in real time. Its implementation schemes include piezoelectric sensors (such as Kaiser MMA series), capacitive sensors (such as Omron E8F2), or strain gauge sensors (such as Honeywell MLH series). The controller receives temperature and pressure signals to coordinate the opening of the flow valve and the rotational speed of the delivery pump 21. In practice, an industrial PLC or embedded controller can be used, with signal connection achieved via wired or wireless means. Traditional single-temperature control easily overlooks the impact of pressure fluctuations on system stability. For example, a sudden increase in pipeline pressure may lead to cavitation or decreased pump efficiency. The introduction of pressure sensors and flow valves constructs a pressure-temperature dual closed-loop control system. When the condensate temperature rises, the controller prioritizes adjusting the flow valve opening to increase the cooling medium flow. If an abnormal pipeline pressure is detected simultaneously (e.g., exceeding 0.5 MPa), the rotational speed of the delivery pump 21 is reduced to avoid overpressure risks. This coordinated control not only maintains heat exchange efficiency but also ensures that the delivery unit 20 is always within its optimal operating range through a pressure compensation mechanism, achieving precise matching of flow and pressure.

[0044] As an optional embodiment of this case, the condensate recovery unit 10 includes an atmospheric pressure vessel 11 and a recovery pipe 12. The atmospheric pressure vessel 11 is connected to the steam seal cooler 100 through the recovery pipe 12, and the other end of the atmospheric pressure vessel 11 is connected to the conveying unit 20.

[0045] As an optional embodiment of this case, the conveying unit 20 includes a conveying pump 21 and a conveying pipe 22 connected to the conveying pump 21. The inlet of the conveying pump 21 is connected to the atmospheric pressure container 11 through the conveying pipe 22, and the outlet of the conveying pump 21 is connected to the target utilization device 200 through another conveying pipe 22.

[0046] It should be noted that the condensate recovery unit 10 achieves the safe collection and temporary storage of high-temperature condensate through the combination of an atmospheric pressure vessel 11 and a recovery pipe 12. The specific implementation of the atmospheric pressure vessel 11 is not limited to stainless steel tanks; fiberglass containers or composite containers with buffer structures can also be used. The recovery pipe 12 can be, for example, a seamless stainless steel pipe, a PVC-lined composite pipe, or a flexible metal hose. For example, stainless steel pipes are suitable for high-temperature and high-pressure conditions, composite pipes perform well in acidic and alkaline environments, and flexible metal hoses facilitate installation and adjustment in complex spaces.

[0047] The conveying unit 20, through the cooperation of the conveying pump 21 and the conveying pipe 22, ensures the efficient delivery of condensate to the open system. The specific selection of the conveying pump 21 can be, for example, a corrosion-resistant centrifugal pump (such as the Grundfos CR series), a screw pump (such as the Netzsch NEMO series), or a pneumatic diaphragm pump. For example, centrifugal pumps are suitable for high-flow-rate applications, screw pumps can handle condensate containing trace impurities, while diaphragm pumps are driven by compressed air in environments without power supply. The conveying pipe 22 can be, for example, a PTFE-lined steel pipe, a high-density polyethylene pipe, or a titanium alloy pipe.

[0048] Traditional closed systems rely on high-pressure vessels and complex sealing structures, while atmospheric pressure vessels 11 simplify equipment complexity through atmospheric connectivity. Only a basic support structure is needed for condensate temporary storage. For example, CIMC Enric's CIMC atmospheric pressure storage tank balances internal and external pressure through a top vent valve. The introduction of atmospheric pressure vessels 11 significantly reduces equipment investment costs and extends the maintenance cycle to more than twice that of traditional closed systems.

[0049] As an optional embodiment of this case, the temperature regulating unit 30 is a heat exchanger 31, which includes a heat exchange tube through which the cooling medium flows.

[0050] The heat exchange tube is immersed in the condensate recovery unit 10, or is disposed in the conveying pipe 22, or is covered on the outer surface of the conveying pipe 22;

[0051] The heat exchange tube includes a cooling medium inlet 311 and a cooling medium outlet 312. The cooling medium inlet 311 is connected to the cooling medium supply system, and the cooling medium outlet 312 is connected to the cooling medium recovery system.

[0052] It should be noted that the temperature regulation unit 30 solves the problems of energy waste and equipment thermal damage caused by the direct discharge of high-temperature condensate in traditional processes. The heat exchanger 31 achieves temperature regulation through heat exchange between the cooling medium and the condensate, and the specific implementation is not limited to shell-and-tube heat exchanger 31, plate heat exchanger 31, or spiral plate heat exchanger 31. When the high-temperature condensate enters the recovery unit or flows through the delivery pipe 22, the cooling medium (such as circulating water, ethylene glycol solution, or air) in the heat exchange tube exchanges heat with the condensate through the tube wall, reducing its temperature to the open system compatible range. For example, when using submerged heat exchange tubes, the cooling water absorbs the heat of the condensate as it flows inside the tube, while the externally mounted finned tubes dissipate heat through natural air convection. The inlet and outlet of the cooling medium are respectively connected to the supply system (such as an industrial circulating water network, cooling tower, or compressed air system) and the recovery system (such as a cooling water return pool or waste heat recovery device), forming a closed-loop or open-loop heat exchange path to ensure efficient energy utilization.

[0053] As an optional embodiment of this case, the target utilization device 200 is an open system used in or in conjunction with a steam-driven compressor, the open system including at least one of a water tank container, a cooling tower, and an evaporative condenser connected to the atmosphere.

[0054] It should be noted that the characteristic of an open system is that it exchanges matter and energy with the external environment; the water tank container achieves heat exchange through the convection of air and water, and can also be equipped with different heat dissipation fin structures to enhance the heat dissipation effect, or equipped with a circulating water pump to promote water flow; the cooling tower can adopt different structural forms such as counter-flow and cross-flow to increase the contact area between water and air and the cooling efficiency; the evaporative condenser also has different coil arrangement methods and spray system designs, such as serpentine coils, spiral coils, etc., and different types of nozzles are available, so as to achieve the exchange of matter and energy with the external environment.

[0055] As an optional embodiment of this case, the temperature of the condensate delivered to the water tank is as low as 45°C, for example, 30°C or 40°C, or a temperature that the water tank can withstand, thereby achieving a match between the condensate temperature and the operating conditions of the water tank.

[0056] As an optional embodiment of this case, the target utilization device 200 is an external device of a steam-driven compressor, and the external device is a thermal energy utilization device or a water resource utilization device.

[0057] As an optional embodiment of this case, the external equipment is one or more of the following: a low-pressure heater, a deaerator, a boiler feedwater treatment system, a heating network heater, a condensate cooler, a steam seal heater, a fuel oil heating device, and a domestic hot water system. The low-pressure heater allows the recovered condensate to be used for heating other condensate, improving the efficiency of the thermal system. The deaerator allows the recovered condensate to be used as makeup water for the deaerator, utilizing its heat and water quality advantages. The boiler feedwater treatment system allows the recovered condensate to be used as a pre-treatment or post-treatment water source, reducing the use of raw water. The heating network heater includes a heating system that allows the recovered condensate to be used for heating the heating network circulating water. The condensate cooler allows the recovered condensate to recover condensate heat, improving overall thermal efficiency. The steam seal heater uses the condensate heat to heat the air in the steam seal system, preventing steam leakage. The fuel oil heating device allows the recovered condensate to be used for heating fuel oil, improving fuel oil flowability and combustion performance. The domestic hot water system allows the recovered condensate to be used for supplying domestic hot water after appropriate treatment.

[0058] As an optional embodiment of this case, the top of the water tank container is equipped with a steam recovery device for collecting the steam volatilized from the condensate and condensing it for reuse.

[0059] It should be noted that the steam recovery device is used to capture and recycle the steam volatilized at the top of the water tank container. The steam recovery device is, for example, a condenser (such as the FLIR CX series steam recovery unit), a spray cooling tower, or an adsorption drying module. For example, the condenser coil directly liquefies the steam through circulating cooling water, the spray tower uses an atomized water curtain to enhance the gas-liquid contact efficiency, and the adsorption drying module is suitable for steam enrichment in low humidity environments.

[0060] When high-temperature condensate enters the water tank, some of the water evaporates into steam due to residual heat. The steam recovery device converts it into liquid water through condensation or adsorption and returns it to the water tank. For example, the FLIR CX steam recovery unit uses copper-nickel alloy coils and cooling water circulation to achieve efficient condensation.

[0061] As an optional embodiment of this case, the water tank is an open-type water tank with a liquid level alarm on top. When the liquid level falls below a set value, a water replenishment signal is automatically triggered. The liquid level alarm can be, for example, a float sensor (such as the Vickers VEGAFLEX86), a capacitive probe (such as the Omron 61F-GP), or an ultrasonic level gauge (such as the E+H FMR50 series). The liquid level alarm in the open-type water tank monitors water level changes in real time and automatically triggers a water replenishment signal (e.g., by sending a command to the water replenishment valve via a PLC) when the liquid level falls below a set threshold, ensuring that the water tank always maintains a safe water level.

[0062] As an optional embodiment of this case, the cooling medium of the heat exchanger 31 is one of circulating cooling water, air or waste heat recovery medium.

[0063] As an optional embodiment of this case, the atmospheric pressure container 11 is made of stainless steel or fiberglass, with a drain port at the bottom and an open structure or an exhaust valve at the top.

[0064] As an optional embodiment of this case, the fluid pump is a corrosion-resistant pump, and the inlet of the corrosion-resistant pump is equipped with a filter to intercept solid impurities in the condensate.

[0065] As an optional embodiment of this case, valves 23 are provided on the delivery pipes 22 on one or both sides of the delivery pump 21. The valves 23 are mechanical valves or solenoid valves electrically connected to the controller.

[0066] As an optional embodiment of this case, the condensate recovery unit 10 includes at least two atmospheric pressure vessels 11. More condensate can be received through multiple atmospheric pressure vessels 11. At the same time, one of the condensate recovery units 10 can be connected to multiple steam-driven compressor steam seal coolers 100 through pipelines, thereby improving the recycling value of the system.

[0067] In summary, this utility model effectively overcomes some practical problems in the prior art, thus having high utilization value and significance.

[0068] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A condensate recovery system, characterized in that, include: A condensate recovery unit is used to connect to the steam seal cooler of a steam-driven compressor to collect the condensate discharged from the steam seal cooler; The conveying unit connects the condensate recovery unit and the target utilization device for the open system; A temperature control unit is used to adjust the temperature of the condensate between the condensate recovery unit and the target utilization device.

2. The condensate recovery system according to claim 1, characterized in that, The condensate recovery unit includes an atmospheric pressure vessel and a recovery pipe, and the atmospheric pressure vessel is connected to the steam seal cooler through the recovery pipe.

3. The condensate recovery system according to claim 1, characterized in that, The conveying unit includes a conveying pump and a conveying pipe connected to the conveying pump.

4. The condensate recovery system according to claim 1, characterized in that, The target utilization device is an open system used in or in conjunction with a steam-driven compressor, and the open system includes at least one of a water tank container, a cooling tower, and an evaporative condenser that are in communication with the atmosphere.

5. The condensate recovery system according to claim 4, characterized in that, The condensate delivered to the water tank container has a temperature as low as 45°C.

6. The condensate recovery system according to claim 1, characterized in that, The target utilization device is an external device of a steam-driven compressor, which is a thermal energy utilization device or a water resource utilization device.

7. The condensate recovery system according to claim 3, characterized in that, It also includes a control unit, which comprises a temperature detection device and a controller; The temperature detection device is installed at the outlet of the temperature regulating unit or on the conveying unit. The temperature detection device is electrically connected to the controller and is used to adjust the flow rate of the temperature regulating medium to dynamically control the condensate temperature.

8. The condensate recovery system according to claim 7, characterized in that, The control unit also includes a flow regulating valve and a pressure sensor. The controller adjusts the opening of the flow regulating valve or the speed of the delivery pump of the delivery unit according to the condensate temperature and pressure signals.

9. The condensate recovery system according to claim 7, characterized in that, The temperature regulating unit is a heat exchanger, which includes heat exchange tubes through which the cooling medium flows. The heat exchange tube is immersed in the condensate recovery unit, or is installed on the delivery pipe, or is covered on the outer surface of the delivery pipe.

10. The condensate recovery system according to claim 4, characterized in that, The top of the water tank is equipped with a steam recovery device for collecting the steam volatilized from the condensate and condensing it for reuse.

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