Deoxidizing device and method for cooling system

Abstract

The invention discloses a cooling system deoxygenization device and method, and relates to the technical field of pure water deoxygenization, the cooling system deoxygenization device comprises a purging gas system composed of a nitrogen cylinder and an electromagnetic valve which are sequentially connected through a pipeline, and a vacuum system composed of a water ring vacuum pump, a gas-liquid separator and a plate heat exchanger which are sequentially connected through a pipeline, the circulating water system is composed of a first electric two-way valve and a deoxygenization membrane assembly which are sequentially connected through a pipeline, and the control device controls the purge gas system, the vacuum system and the circulating water system to achieve automatic deoxygenization of the converter valve cooling system. The method has the beneficial effects that an on-line deoxidization method or an off-line deoxidization method can be provided for the converter valve cooling system, when the on-line deoxidization method is adopted, the deoxidization device automatically operates for deoxidization, manual operation is not needed, and the full-automatic and real-time deoxidization requirements of the cooling system are met; in the off-line method, the deoxidizing device can be used as a tool as required, and the two modes are combined to meet the use requirements of different occasions.

Description

Technical Field

[0001] The invention relates to the fields of pure water deoxidation and electric power technology, and in particular to a cooling system deoxidation device and method. Background Art

[0002] The dissolved oxygen in the cooling system of the UHV DC converter valve will corrode the valve cooling system pipes, radiators and other metal parts, reducing the system service life and lowering the system operation reliability.

[0003] At present, the deoxygenation method of the converter valve cooling system is: manually fill the deoxygenation resin in the ion tank during the debugging stage, and the dissolved oxygen in the cooling system reacts chemically with the deoxygenation resin. When the dissolved oxygen content in the system drops below the target value, the deoxygenation resin is manually replaced with a deionization resin; when the system is overhauled or inspected annually, the dissolved oxygen meter is monitored on site. When the dissolved oxygen content is higher than the target value, nitrogen aeration is manually performed to deoxygenate the system to reduce the dissolved oxygen content to below the target value. This method takes a long time to deoxygenate, consumes a lot of human resources, and cannot maintain the dissolved oxygen content of the system below the target value in real time. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a cooling system deoxygenation device and method, which can overcome the problems and defects of the prior art that the deoxygenation of the converter valve cooling system is time-consuming, labor-intensive, and unable to maintain the dissolved oxygen content in the system below the target value in real time.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a cooling system deoxygenation device, which includes a purge gas system, a vacuum system, a circulating water system and a control device; The purge gas system is connected to the air inlet of the deoxygenation membrane assembly, the vacuum system is connected to the air outlet of the deoxygenation membrane assembly, and the deoxygenation membrane assembly in the circulating water system is connected through the liquid side interface; The purge gas system includes: a nitrogen bottle and a solenoid valve connected in sequence through pipelines, which are used to provide the deoxygenation membrane assembly with the purge gas required for deoxygenation; The vacuum system includes: a water ring vacuum pump, a gas-liquid separator, and a plate heat exchanger connected in sequence through pipelines, which are used to provide the deoxygenation membrane assembly with the vacuum required for deoxygenation; The circulating water system includes a first electric two-way valve and a deoxygenation membrane assembly which are sequentially connected through pipelines and are used to provide deoxygenated medium for the deoxygenation device; The control device is used to control the purge gas system, vacuum system and circulating water system to achieve automatic deoxygenation of the converter valve cooling system.

[0008] As a preferred solution of the cooling system deoxygenation device of the present invention, wherein: the bypass water pipeline to which the second electric two-way valve and the plate heat exchanger are sequentially connected through a pipeline in the vacuum system is used to provide cooling water for the vacuum system; The vacuum system includes an axial flow fan on the gas-liquid separator, an external cold water pipeline through the third electric two-way valve and a first temperature sensor, which is used to monitor the working fluid temperature of the water ring vacuum pump and control the opening and closing of the second electric two-way valve, the third electric two-way valve and the axial flow fan by feeding the result back to the control device; The vacuum system also includes a liquid level switch for monitoring the liquid level in the gas-liquid separator and feeding the result back to the control device.

[0009] As a preferred solution of the cooling system deoxygenation device of the present invention, wherein: the circulating water system comprises a first flow meter, a first pressure gauge and a second pressure gauge arranged on the circulating water system; The first flow meter is used to monitor the water flow entering the deaeration membrane assembly, and the first pressure gauge and the second pressure gauge are used to monitor the inlet water pressure and the inlet and outlet water pressure difference of the deaeration membrane assembly; The purge gas system includes a pressure reducing valve, a needle valve, and a second flow meter; the pressure reducing valve is used to reduce the high-pressure purge gas in the nitrogen bottle to the pressure required by the deoxygenation membrane assembly, and the needle valve and the second flow meter are used to adjust and monitor the purge gas flow; The vacuum system includes a check valve arranged on the suction pipeline of the water ring vacuum pump, and the check valve is used to prevent the liquid in the vacuum pump from flowing back into the deoxidation membrane assembly.

[0010] As a preferred solution of the deoxygenation device of the cooling system of the present invention, wherein: a dissolved oxygen detector, a second temperature sensor, and a pressure sensor are respectively connected to the control device; The dissolved oxygen detector and the second temperature sensor are installed on the circulating water system on the water inlet side of the deaeration membrane assembly to monitor the dissolved oxygen content of the converter valve cooling system and the water temperature entering the deaeration membrane assembly. The pressure sensor is installed on the suction pipeline of the water ring vacuum pump to monitor the vacuum degree provided by the vacuum system.

[0011] In order to solve the above technical problems, the present invention provides the following technical solutions: a cooling system deoxygenation method, comprising a cooling system deoxygenation device; and, The control device controls the first electric two-way valve to allow circulating water of the converter valve cooling system to flow through the deaeration membrane assembly; The water ring vacuum pump generates vacuum inside the deaeration membrane module under the control of the control device. The dissolved oxygen in the circulating water of the converter valve cooling system is precipitated into the deaeration membrane module under the action of negative pressure. Under the control of the control device, the solenoid valve allows the decompressed purge gas to flow into the deoxygenation membrane assembly to purge out the oxygen therein; Including online deoxygenation method and offline deoxygenation method; The online deoxygenation method includes four operation modes: the first deoxygenation mode, the second deoxygenation mode, the third deoxygenation mode, and the bypass mode.

[0012] As a preferred solution of the cooling system deoxygenation method of the present invention, the online deoxygenation method includes a dissolved oxygen detector and a second temperature sensor arranged on the front-end circulating water system of the deoxygenation membrane module, which are used to monitor the dissolved oxygen content of the converter valve cooling system and the water temperature entering the deoxygenation membrane module, and feed back the results to the control device; The liquid level switch installed on the gas-liquid separator monitors the liquid level in the gas-liquid separator and feeds the result back to the control device; The pressure sensor installed on the suction pipeline of the water ring vacuum pump is used to monitor the vacuum degree provided by the water ring vacuum pump and feed the result back to the control device; A first temperature sensor disposed on the liquid replenishing pipeline of the water ring vacuum pump is used to monitor the temperature of the working fluid of the water ring vacuum pump and feed the result back to the control device; The online deoxygenation method also includes a control device that controls the opening and closing of the second electric two-way valve, the third electric two-way valve, and the axial flow fan by comparing the feedback values ​​and set values ​​of the dissolved oxygen detector, the second temperature sensor, and the first temperature sensor to meet the normal working conditions of the deoxygenation device.

[0013] As a preferred solution of the cooling system deoxygenation method of the present invention, wherein: in the first deoxygenation mode, the feedback value of the dissolved oxygen detector is higher than the set value, and the feedback value of the second temperature sensor is lower than the feedback value of the first temperature sensor; In the first deoxygenation mode, the first electric two-way valve and the second electric two-way valve are opened, the third electric two-way valve and the axial flow fan are closed, the water ring vacuum pump and the solenoid valve are opened, and the working fluid of the water ring vacuum pump is cooled by the cooling water of the converter valve.

[0014] As a preferred solution of the cooling system deoxygenation method of the present invention, wherein: in the second deoxygenation mode, the feedback value of the dissolved oxygen detector is higher than the set value, and the feedback value of the second temperature sensor is close to the feedback value of the first temperature sensor; In the second deoxygenation mode, the first electric two-way valve and the second electric two-way valve are opened, the third electric two-way valve is closed, the axial flow fan is turned on, the water ring vacuum pump and the solenoid valve are turned on, and the working fluid of the water ring vacuum pump is cooled by the converter valve cooling water and the axial flow fan.

[0015] As a preferred solution of the cooling system deoxygenation method of the present invention, wherein: in the third deoxygenation mode, the feedback value of the dissolved oxygen detector is higher than the set value, the feedback value of the second temperature sensor is higher than the feedback value of the first temperature sensor, and lower than the set value of the water temperature at the inlet of the deoxygenation membrane assembly; In the third deoxygenation mode, the first electric two-way valve is opened, the second electric two-way valve is closed, the third electric two-way valve is opened, the axial flow fan is closed, the water ring vacuum pump and the solenoid valve are opened, and the working fluid of the water ring vacuum pump is mixed with water and cooled by external cold water.

[0016] As a preferred solution of the cooling system deoxygenation method of the present invention, wherein: in the bypass mode, the feedback value of the dissolved oxygen detector is lower than the set value, or the feedback value of the second temperature sensor is higher than the set value of the water temperature at the inlet of the deoxygenation membrane assembly; In bypass mode, the first electric two-way valve is closed, the second electric two-way valve is opened, the third electric two-way valve is closed, the axial flow fan is turned off, the water ring vacuum pump and the solenoid valve are closed, and the converter valve cooling system continues to operate, but stops deoxygenating it; Under the offline deoxygenation method, the first electric two-way valve is opened, the second electric two-way valve is closed, the solenoid valve, water ring vacuum pump, third electric two-way valve, and axial flow fan are turned on, and all the water in the cooling system flows through the deoxygenation membrane assembly. The deoxygenation device reduces the dissolved oxygen content in the cooling system to below the target value in a short time. The deoxygenation device can then be shut down or dismantled, the converter valve cooling system is closed and the dissolved oxygen content is maintained below the target value.

[0017] The beneficial effects of the present invention are as follows: by setting up a deoxygenation device and method, automatic deoxygenation can be achieved during the operation of the converter valve cooling system, and the dissolved oxygen content in the cooling system is maintained below the target value in real time, so as to achieve the effect of safe and stable operation of the converter valve cooling system; it can be used online or offline, and compared with the traditional deoxygenation method, the online mode saves the manpower work of replacing resin in the debugging stage and aeration deoxygenation in the operation stage, and significantly improves the automation and intelligence level of the converter valve cooling system; compared with the traditional deoxygenation method, the offline mode greatly shortens the deoxygenation time, and the manual operation is simple and easy; it solves the problem that the deoxygenation membrane component cannot work normally due to the high water temperature during the operation of the converter valve cooling system, and improves the water temperature applicability of the deoxygenation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1This is a schematic diagram of the system composition of the cooling system deaerator.

[0019] In the figure: 101, solenoid valve; 102, water ring vacuum pump; 103, first electric two-way valve; 104, second electric two-way valve; 105, third electric two-way valve; 106, axial flow fan; 201, pressure reducing valve; 202, needle valve; 203, second flow meter; 204, pressure sensor; 205, check valve; 206, first temperature sensor; 207, liquid level switch; 301, dissolved oxygen detector; 302, second temperature sensor; 303, first flow meter; 304, first pressure gauge; 305, second pressure gauge; 401, deoxygenation membrane assembly; 402, nitrogen bottle; 403, gas-liquid separator; 404, plate heat exchanger; 500, control device. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0023] Example 1 Reference Figure 1 , which is the first embodiment of the present invention, provides a cooling system deoxygenation device, which includes a purge gas system, a vacuum system, a circulating water system and a control device 500.

[0024] Specifically, the purge gas system, vacuum system, circulating water system and control device 500; The purge gas system is connected to the air inlet of the deoxygenation membrane assembly 401, the vacuum system is connected to the air outlet of the deoxygenation membrane assembly 401, and the deoxygenation membrane assembly 401 in the circulating water system is connected via a liquid side interface; The purge gas system includes: a nitrogen bottle 402 and a solenoid valve 101 connected in sequence through a pipeline, which are used to provide the deoxygenation membrane assembly 401 with the purge gas required for deoxygenation; The vacuum system includes: a water ring vacuum pump 102, a gas-liquid separator 403, and a plate heat exchanger 404 connected in sequence through pipelines, and is used to provide the deoxygenation membrane assembly 401 with the vacuum required for deoxygenation; The circulating water system includes: a first electric two-way valve 103 and a deoxygenation membrane assembly 401 which are sequentially connected through pipelines and are used to provide deoxygenated medium for the deoxygenation device; The control device 500 is used to control the purge gas system, the vacuum system, and the circulating water system to achieve automatic deoxygenation of the converter valve cooling system.

[0025] Preferably, the vacuum system is equipped with a bypass water pipeline and multiple cooling mechanisms, including a plate heat exchanger 404, an axial flow fan 106 and an external cold water pipeline. This design not only ensures the stable operation of the water ring vacuum pump 102, but also realizes efficient use of energy through the intelligent temperature control system including the first temperature sensor 206 and the control device 500.

[0026] The first flow meter 303, the first pressure gauge 304 and the second pressure gauge 305 in the circulating water system form an accurate monitoring network to grasp the system operation status in real time. The pressure reducing valve 201, the needle valve 202 and the second flow meter 203 in the purge gas system ensure the accurate control of the purge gas and optimize the use efficiency of nitrogen.

[0027] Furthermore, the vacuum system connects the second electric two-way valve 104 and the plate heat exchanger 404 in sequence through a bypass water pipeline, which is used to provide cooling water for the vacuum system; The vacuum system includes an axial flow fan 106 on the gas-liquid separator 403, an external cold water pipeline through the third electric two-way valve 105, and a first temperature sensor 206, which is used to monitor the working fluid temperature of the water ring vacuum pump 102, and control the opening and closing of the second electric two-way valve 104, the third electric two-way valve 105, and the axial flow fan 106 by feeding back the result to the control device 500; The liquid level switch 207 is used to monitor the liquid level in the gas-liquid separator 403 and feed the result back to the control device 500.

[0028] Preferably, the core component deoxygenation membrane assembly 401 is the key to the present invention, which utilizes the principle of selective permeation to effectively remove dissolved oxygen in cooling water. The purge gas system provides high-purity nitrogen for the deoxygenation process, and the vacuum system creates the necessary pressure gradient to promote the rapid separation of oxygen. This dual action mechanism greatly improves the deoxygenation efficiency.

[0029] Further, the circulating water system includes a first flow meter 303, a first pressure gauge 304 and a second pressure gauge 305 arranged on the circulating water system; The first flow meter 303 is used to monitor the water flow entering the deaeration membrane assembly 401; the first pressure gauge 304 and the second pressure gauge 305 are used to monitor the inlet water pressure and the inlet and outlet water pressure difference of the deaeration membrane assembly 401; The purge gas system includes a pressure reducing valve 201, a needle valve 202, and a second flow meter 203; the pressure reducing valve 201 is used to reduce the pressure of the high-pressure purge gas in the nitrogen bottle 402 to the pressure required by the deoxygenation membrane assembly 401; the needle valve 202 and the second flow meter 203 are used to adjust and monitor the purge gas flow; The vacuum system includes a check valve 205 disposed on the suction pipeline of the water ring vacuum pump 102 . The check valve 205 is used to prevent the liquid in the vacuum pump from flowing back into the deoxygenation membrane assembly 401 .

[0030] Further, it includes a dissolved oxygen detector 301, a second temperature sensor 302, and a pressure sensor 204 respectively connected to the control device 500; The dissolved oxygen detector 301 and the second temperature sensor 302 are arranged on the circulating water system on the water inlet side of the deoxygenation membrane assembly 401, and are used to monitor the dissolved oxygen content of the converter valve cooling system and the water temperature entering the deoxygenation membrane assembly 401; the pressure sensor 204 is arranged on the suction pipeline of the water ring vacuum pump 102, and is used to monitor the vacuum degree provided by the vacuum system.

[0031] It should be noted that when the liquid level in the gas-liquid separator 403 is lower than the position of the liquid level switch 207, the control device 500 replenishes the gas-liquid separator 403 by opening the third electric two-way valve 105; When in use, the control device 500 plays a core role. It coordinates and adjusts the operating parameters of the purge gas system, vacuum system and circulating water system based on the feedback of each sensor. For example, when the dissolved oxygen content exceeds the standard, the control turns on the deoxygenation mode; when the water temperature is abnormal, the working state of the cooling system can be adjusted. This intelligent operation mode not only improves the deoxygenation efficiency, but also realizes the optimal use of energy.

[0032] In summary, the present invention realizes efficient automatic deoxygenation of the UHV DC converter valve cooling system by innovatively integrating multiple systems to work together.

[0033] Example 2 The second embodiment of the present invention provides a cooling system deoxygenation method, which includes:

[0034] Specifically, the control device 500 controls the first electric two-way valve 103 to allow the circulating water of the converter valve cooling system to flow through the deoxygenation membrane assembly 401; The water ring vacuum pump 102 generates a vacuum inside the deoxygenation membrane assembly 401 under the control of the control device 500, and the dissolved oxygen in the circulating water of the converter valve cooling system is precipitated into the deoxygenation membrane assembly 401 under the action of negative pressure; Under the control of the control device 500, the solenoid valve 101 allows the decompressed purge gas to flow into the deoxygenation membrane assembly 401 to purge out the oxygen therein; Including online deoxygenation method and offline deoxygenation method; The online deoxygenation method includes four operation modes: the first deoxygenation mode, the second deoxygenation mode, the third deoxygenation mode, and the bypass mode.

[0035] Preferably, the deoxygenation method is divided into an online deoxygenation method and an offline deoxygenation method, and the online deoxygenation method includes four operation modes: a first deoxygenation mode, a second deoxygenation mode, a third deoxygenation mode, and a bypass mode.

[0036] Under the monitoring and control of the control device 500, when the feedback value of the dissolved oxygen detector 301 is higher than the set value and the feedback value of the second temperature sensor 302 is close to the feedback value of the first temperature sensor 206, the device switches to the second deoxygenation mode. In the second deoxygenation mode, the first electric two-way valve 103 and the second electric two-way valve 104 are opened, the third electric two-way valve 105 is closed, the axial flow fan 106 is turned on, the water ring vacuum pump 102 and the solenoid valve 101 are turned on, and the working fluid of the water ring vacuum pump 102 is cooled down by the cooling water of the converter valve and the axial flow fan 106.

[0037] Under the monitoring and control of the control device 500, when the feedback value of the dissolved oxygen detector 301 is higher than the set value, the feedback value of the second temperature sensor 302 is higher than the feedback value of the first temperature sensor 206, and lower than the set value of the inlet water temperature of the deoxygenation membrane assembly 401, the device switches to the third deoxygenation mode. In the third deoxygenation mode, the first electric two-way valve 103 is opened, the second electric two-way valve 104 is closed, the third electric two-way valve 105 is opened, the axial flow fan 106 is closed, the water ring vacuum pump 102 and the solenoid valve 101 are opened, and the working fluid of the water ring vacuum pump 102 is mixed and cooled by external cold water.

[0038] Furthermore, the online deoxygenation method includes: a dissolved oxygen detector 301 and a second temperature sensor 302 are arranged on the circulating water system at the front end of the deoxygenation membrane module 401, for monitoring the dissolved oxygen content of the converter valve cooling system and the water temperature entering the deoxygenation membrane module 401, and feeding back the results to the control device 500; The liquid level switch 207 disposed on the gas-liquid separator monitors the liquid level in the gas-liquid separator 403 and feeds the result back to the control device 500; A pressure sensor disposed on the suction pipeline of the water ring vacuum pump 102 is used to monitor the vacuum degree provided by the water ring vacuum pump 102 and feed back the result to the control device 500; A first temperature sensor 206 disposed on the liquid replenishing pipeline of the water ring vacuum pump 102 is used to monitor the temperature of the working fluid of the water ring vacuum pump 102 and feed the result back to the control device 500; The online deoxygenation method also includes: the control device 500 controls the opening and closing of the second electric two-way valve 104, the third electric two-way valve 105, and the axial flow fan 106 by comparing the feedback values ​​and set values ​​of the dissolved oxygen detector 301, the second temperature sensor 302, and the first temperature sensor 206 to meet the normal working conditions of the deoxygenation device.

[0039] Preferably, under the monitoring and control of the control device 500, when the feedback value of the dissolved oxygen detector 301 is lower than the set value, or the feedback value of the second temperature sensor 302 is higher than the set value of the inlet water temperature of the deoxygenation membrane assembly 401, the device switches to the bypass mode. In the bypass mode, the first electric two-way valve 103 is closed, the second electric two-way valve 104 is opened, the third electric two-way valve 105 is closed, the axial flow fan 106 is closed, the water ring vacuum pump 102 and the solenoid valve 101 are closed, and the converter valve cooling system continues to operate, but stops deoxygenating it.

[0040] Further, in the first deoxygenation mode, the feedback value of the dissolved oxygen detector 301 is higher than the set value, and the feedback value of the second temperature sensor 302 is lower than the feedback value of the first temperature sensor 206; In the first deoxygenation mode, the first electric two-way valve 103 and the second electric two-way valve 104 are opened, the third electric two-way valve 105 and the axial flow fan 106 are closed, the water ring vacuum pump 102 and the solenoid valve 101 are opened, and the working fluid of the water ring vacuum pump 102 is cooled by the cooling water of the converter valve.

[0041] Further, in the second deoxygenation mode, the feedback value of the dissolved oxygen detector 301 is higher than the set value, and the feedback value of the second temperature sensor 302 is close to the feedback value of the first temperature sensor 206; In the second deoxygenation mode, the first electric two-way valve 103 and the second electric two-way valve 104 are opened, the third electric two-way valve 105 is closed, the axial flow fan 106 is turned on, the water ring vacuum pump 102 and the solenoid valve 101 are turned on, and the working fluid of the water ring vacuum pump 102 is cooled by the converter valve cooling water and the axial flow fan 106.

[0042] Furthermore, in the third deoxygenation mode, the feedback value of the dissolved oxygen detector 301 is higher than the set value, the feedback value of the second temperature sensor 302 is higher than the feedback value of the first temperature sensor 206, and lower than the set value of the inlet water temperature of the deoxygenation membrane assembly 401; In the third deoxygenation mode, the first electric two-way valve 103 is opened, the second electric two-way valve 104 is closed, the third electric two-way valve 105 is opened, the axial flow fan 106 is closed, the water ring vacuum pump 102 and the solenoid valve 101 are opened, and the working fluid of the water ring vacuum pump 102 is mixed with water and cooled by external cold water.

[0043] Further, in the bypass mode, the feedback value of the dissolved oxygen detector 301 is lower than the set value, or the feedback value of the second temperature sensor 302 is higher than the set value of the inlet water temperature of the deoxygenation membrane assembly 401; In bypass mode, the first electric two-way valve 103 is closed, the second electric two-way valve 104 is opened, the third electric two-way valve 105 is closed, the axial flow fan 106 is turned off, the water ring vacuum pump 102 and the solenoid valve 101 are closed, and the converter valve cooling system continues to operate, but stops deoxygenating it; Under the offline deoxygenation method, the first electric two-way valve 103 is opened, the second electric two-way valve 104 is closed, the solenoid valve 101, the water ring vacuum pump 102, the third electric two-way valve 105, and the axial flow fan 106 are turned on, and all the water in the cooling system flows through the deoxygenation membrane assembly 401. The deoxygenation device reduces the dissolved oxygen content in the cooling system to below the target value in a short time, and then the deoxygenation device can be shut down or dismantled, the converter valve cooling system is closed and circulated, and the dissolved oxygen content is maintained below the target value.

[0044] In summary, the present invention can realize automatic deoxygenation during the operation of the converter valve cooling system by setting a deoxygenation method, and maintain the dissolved oxygen content in the cooling system below the target value in real time, so as to achieve the effect of safe and stable operation of the converter valve cooling system; it can be used online or offline, and compared with the traditional deoxygenation method, the online mode saves the manpower of replacing resin in the debugging stage and aeration deoxygenation in the operation stage, and significantly improves the automation and intelligence level of the converter valve cooling system; compared with the traditional deoxygenation method, the offline mode greatly shortens the deoxygenation time, and the manual operation is simple and easy; it solves the problem that the deoxygenation membrane component cannot work normally due to the high water temperature during the operation of the converter valve cooling system, and improves the water temperature applicability of the deoxygenation device.

[0045] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0046] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0047] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0048] 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 preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A cooling system deoxygenation device, characterized in that: include, Purge gas system, vacuum system, circulating water system and control device (500); The purge gas system is connected to the air inlet of the deoxygenation membrane assembly (401), the vacuum system is connected to the air outlet of the deoxygenation membrane assembly (401), and the deoxygenation membrane assembly (401) in the circulating water system is connected via a liquid side interface; The purge gas system comprises a nitrogen gas bottle (402) and a solenoid valve (101) which are connected in sequence through a pipeline and are used to provide the deoxygenation membrane assembly (401) with the purge gas required for deoxygenation; The vacuum system comprises a water ring vacuum pump (102), a gas-liquid separator (403), and a plate heat exchanger (404) which are connected in sequence through pipelines, and is used to provide the deoxygenation membrane assembly (401) with a vacuum degree required for deoxygenation; The circulating water system comprises a first electric two-way valve (103) and a deoxygenation membrane assembly (401) which are connected in sequence through a pipeline and are used to provide a deoxygenated medium for the deoxygenation device; The control device (500) is used to control the purge gas system, the vacuum system, and the circulating water system, so as to realize automatic deoxygenation of the converter valve cooling system.

2. The cooling system deoxygenation device according to claim 1, characterized in that: The vacuum system connects the second electric two-way valve (104) and the plate heat exchanger (404) in sequence through a pipeline, and the bypass water pipeline is used to provide cooling water for the vacuum system; The vacuum system comprises an axial flow fan (106) on the gas-liquid separator (403), an external cold water pipeline through a third electric two-way valve (105), and a first temperature sensor (206), which is used to monitor the working fluid temperature of the water ring vacuum pump (102) and to control the opening and closing of the second electric two-way valve (104), the third electric two-way valve (105), and the axial flow fan (106) by feeding back the result to the control device (500); The vacuum system also includes a liquid level switch (207) for monitoring the liquid level in the gas-liquid separator (403) and feeding back the result to the control device (500).

3. The cooling system deoxygenation device according to claim 2, characterized in that: The circulating water system comprises a first flow meter (303), a first pressure gauge (304) and a second pressure gauge (305) which are arranged on the circulating water system; The first flow meter (303) is used to monitor the water flow entering the deoxygenation membrane assembly (401), and the first pressure gauge (304) and the second pressure gauge (305) are used to monitor the inlet water pressure and the inlet and outlet water pressure difference of the deoxygenation membrane assembly (401); The purge gas system comprises a pressure reducing valve (201), a needle valve (202), and a second flow meter (203); the pressure reducing valve (201) is used to reduce the pressure of the high-pressure purge gas in the nitrogen bottle (402) to the pressure required by the deoxygenation membrane assembly (401), and the needle valve (202) and the second flow meter (203) are used to adjust and monitor the flow rate of the purge gas; The vacuum system comprises a check valve (205) arranged on a suction pipeline of a water ring vacuum pump (102), wherein the check valve (205) is used to prevent liquid in the vacuum pump from flowing back into the deoxygenation membrane assembly (401).

4. The cooling system deoxygenation device according to claim 3, characterized in that: a dissolved oxygen detector (301), a second temperature sensor (302), and a pressure sensor (204) respectively connected to the control device (500); The dissolved oxygen detector (301) and the second temperature sensor (302) are arranged on the circulating water system on the water inlet side of the deoxygenation membrane assembly (401) and are used to monitor the dissolved oxygen content of the converter valve cooling system and the temperature of water entering the deoxygenation membrane assembly (401). The pressure sensor (204) is arranged on the suction pipeline of the water ring vacuum pump (102) and is used to monitor the vacuum degree provided by the vacuum system.

5. A cooling system deoxygenation method, characterized in that: The cooling system deoxidation device according to claim 4; and The control device (500) controls the first electric two-way valve (103) to allow circulating water of the converter valve cooling system to flow through the deoxygenation membrane assembly (401); The water ring vacuum pump (102) generates a vacuum inside the deoxygenation membrane assembly (401) under the control of the control device (500), so that the dissolved oxygen in the circulating water of the converter valve cooling system is precipitated into the deoxygenation membrane assembly (401) under the action of negative pressure; The solenoid valve (101), under the control of the control device (500), allows the decompressed purge gas to flow into the deoxygenation membrane assembly (401) to purge out the oxygen therein; Including online deoxygenation method and offline deoxygenation method; The online deoxygenation method includes four operation modes: a first deoxygenation mode, a second deoxygenation mode, a third deoxygenation mode, and a bypass mode.

6. The cooling system deoxygenation method according to claim 5, characterized in that: The online deoxygenation method comprises the dissolved oxygen detector (301) and a second temperature sensor (302) arranged on a front-end circulating water system of the deoxygenation membrane assembly (401), which are used to monitor the dissolved oxygen content of the converter valve cooling system and the water temperature entering the deoxygenation membrane assembly (401), and feed back the results to a control device (500); A liquid level switch (207) disposed on the gas-liquid separator to monitor the liquid level in the gas-liquid separator (403) and feed the result back to the control device (500); A pressure sensor disposed on the air suction pipeline of the water ring vacuum pump (102), used for monitoring the vacuum degree provided by the water ring vacuum pump (102) and feeding back the result to the control device (500); A first temperature sensor (206) disposed on a liquid replenishing pipeline of the water ring vacuum pump (102), used for monitoring the temperature of the working fluid of the water ring vacuum pump (102) and feeding back the result to the control device (500); The online deoxygenation method further comprises a control device (500) which controls the opening and closing of the second electric two-way valve (104), the third electric two-way valve (105), and the axial flow fan (106) by comparing the feedback values ​​of the dissolved oxygen detector (301), the second temperature sensor (302), and the first temperature sensor (206) with the set values, so as to meet the normal working conditions of the deoxygenation device.

7. The cooling system deoxygenation method according to claim 6, characterized in that: In the first deoxygenation mode, the feedback value of the dissolved oxygen detector (301) is higher than the set value, and the feedback value of the second temperature sensor (302) is lower than the feedback value of the first temperature sensor (206); In the first deoxygenation mode, the first electric two-way valve (103) and the second electric two-way valve (104) are opened, the third electric two-way valve (105) and the axial flow fan (106) are closed, the water ring vacuum pump (102) and the solenoid valve (101) are opened, and the working fluid of the water ring vacuum pump (102) is cooled down using cooling water from the converter valve.

8. The cooling system deoxygenation method according to claim 7, characterized in that: In the second deoxygenation mode, the feedback value of the dissolved oxygen detector (301) is higher than the set value, and the feedback value of the second temperature sensor (302) is close to the feedback value of the first temperature sensor (206); In the second deoxygenation mode, the first electric two-way valve (103) and the second electric two-way valve (104) are opened, the third electric two-way valve (105) is closed, the axial flow fan (106) is turned on, the water ring vacuum pump (102) and the solenoid valve (101) are turned on, and the working fluid of the water ring vacuum pump (102) is cooled down by using the cooling water of the conversion valve and the axial flow fan (106) together.

9. The cooling system deoxygenation method according to claim 8, characterized in that: In the third deoxygenation mode, the feedback value of the dissolved oxygen detector (301) is higher than the set value, the feedback value of the second temperature sensor (302) is higher than the feedback value of the first temperature sensor (206), and lower than the set value of the inlet water temperature of the deoxygenation membrane assembly (401); In the third deoxygenation mode, the first electric two-way valve (103) is opened, the second electric two-way valve (104) is closed, the third electric two-way valve (105) is opened, the axial flow fan (106) is closed, the water ring vacuum pump (102) and the solenoid valve (101) are opened, and the working fluid of the water ring vacuum pump (102) is mixed with water and cooled using external cold water.

10. The cooling system deoxygenation method according to claim 9, characterized in that: In the bypass mode, the feedback value of the dissolved oxygen detector (301) is lower than the set value, or the feedback value of the second temperature sensor (302) is higher than the set value of the inlet water temperature of the deoxygenation membrane assembly (401); In the bypass mode, the first electric two-way valve (103) is closed, the second electric two-way valve (104) is opened, the third electric two-way valve (105) is closed, the axial flow fan (106) is turned off, the water ring vacuum pump (102) and the solenoid valve (101) are turned off, and the converter valve cooling system continues to operate, but deoxygenation thereof is stopped; In the offline deoxygenation method, the first electric two-way valve (103) is opened, the second electric two-way valve (104) is closed, the solenoid valve (101), the water ring vacuum pump (102), the third electric two-way valve (105), and the axial flow fan (106) are opened, and all the water in the cooling system flows through the deoxygenation membrane assembly (401). The deoxygenation device reduces the dissolved oxygen content in the cooling system to below the target value in a short period of time, and then the deoxygenation device can be shut down or dismantled, and the converter valve cooling system is closed and circulated, and the dissolved oxygen content is maintained below the target value.

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