A high-efficiency low-temperature oxygen removal system

Abstract

The application relates to the technical field of boiler make-up water deoxidation, in particular to a high-efficiency low-temperature deoxidation system. The system comprises a vacuum deoxidizer and a water ring vacuum pump unit, a low-pressure steam pocket is connected with the vacuum deoxidizer through a pipeline, the vacuum deoxidizer is used for removing oxygen in the to-be-processed make-up water, and the deoxidized make-up water enters the water ring vacuum pump unit through a communicating pipeline; a central control unit is connected with the vacuum deoxidizer through a wireless signal, the central control unit is used for setting working parameters of the vacuum deoxidizer; and a monitoring unit is arranged in the vacuum deoxidizer and used for acquiring running parameters of the vacuum deoxidizer. The vacuum deoxidization realizes deoxidization under the condition of a low-temperature water surface (at 70 DEG C or normal temperature), the self-consumption steam quantity of a boiler room is reduced, the vacuum deoxidization can utilize low-grade waste heat, the water can be heated and softened by a jet heater, the deoxidization can be realized in stages and at a low position, the deoxidization is reliable, and the operation is stable.

Description

A highly efficient low-temperature deoxygenation system Technical Field

[0001] This application relates to the field of boiler feedwater deoxygenation technology, and in particular to a high-efficiency low-temperature deoxygenation system. Background Technology

[0002] In the feedwater treatment process of domestic gas turbine combined cycle units, deoxygenation is a crucial step. Currently, most factories and enterprises use thermal deoxygenation to treat boiler feedwater. This method requires consuming a large amount of steam to heat and soften the water to 104°C, reducing its oxygen content to ensure the safe operation of the boiler.

[0003] Thermal deoxygenation is a deoxygenation method that does not increase the salinity of the deoxygenated water or the dissolved amount of other gases. It is relatively easy to operate and control, and its operation is stable and reliable. Thermal deoxygenation is the most widely used deoxygenation method. However, several problems exist in practical applications. First, steam consumption is high, generally requiring 18-20% of the boiler's steam production. Second, the temperature control range is narrow, only about 2°C, resulting in poor load adaptability. In actual operation, frequent fluctuations in boiler heat load and low management levels can lead to the inability to meet the necessary conditions for the effective operation of the boiler thermal deoxygenation equipment, resulting in less than ideal deoxygenation efficiency and effect. Furthermore, thermal deoxygenation can cause excessively high boiler feedwater temperatures, significantly reducing the economic and safety indicators of the boiler feedwater equipment and economizer. Summary of the Invention

[0004] The purpose of this application is to address the technical problem that thermal deoxygenation methods for treating boiler feedwater have poor deoxygenation effects and are prone to causing pump damage. This application provides a highly efficient low-temperature deoxygenation system, which aims to improve the deoxygenation effect and reduce the boiler's self-consumption of steam.

[0005] In some embodiments of this application, a vacuum deaerator is added. Water from the low-pressure steam drum enters the vacuum deaerator through pipelines, and after deoxygenation, it enters the water ring vacuum pump system through pipelines to obtain condensate as required by national standards. During the deaeration process, makeup water enters from the top of the vacuum deaerator through pipelines to ensure the normal operation of the deaeration process. Vacuum deaeration achieves deaeration at low water surface temperatures (70°C or room temperature), reducing the boiler room's self-consumption of steam. Furthermore, vacuum deaeration can utilize low-grade waste heat, allowing for the use of jet heaters to heat softened water. It also allows for staged and low-level installation, ensuring reliable deaeration and stable operation.

[0006] In some embodiments of this application, a two-stage deoxygenation process is set up. In the primary deoxygenation stage, a spray device is used to complete the process. The spray speed is dynamically adjusted to ensure that the makeup water is heated to the maximum extent and to ensure the deoxygenation effect. In the deep deoxygenation stage, steam is sprayed into the water in the deoxygenation zone so that the water and steam can fully contact each other and finally heat the makeup water to the saturation temperature under vacuum pressure, thereby achieving the deoxygenation effect.

[0007] In some embodiments of this application, a highly efficient cryogenic deoxygenation system is provided, comprising:

[0008] The vacuum deaerator and water ring vacuum pump unit are connected to the low-pressure steam drum via a pipeline. The vacuum deaerator is used to remove oxygen from the makeup water to be treated. The deaerated makeup water enters the water ring vacuum pump unit through a connecting pipeline.

[0009] The central control unit is connected to the vacuum deaerator via a wireless signal, and the central control unit is used to set the operating parameters of the vacuum deaerator.

[0010] A monitoring unit is installed inside the vacuum deaerator, and the monitoring unit is used to acquire the operating parameters of the vacuum deaerator.

[0011] In some embodiments of this application, the central control unit includes:

[0012] The first processing module is used to acquire the parameters of the makeup water to be treated and generate a makeup water evaluation value a. The first processing module is also used to set the makeup water injection rate v in the initial deoxygenation stage according to the makeup water evaluation value a.

[0013] The second processing module is used to set the heating temperature c of the deep deoxygenation stage. The second processing module is also used to preset the monitoring time node and obtain the real-time vacuum degree d in the vacuum deaerator according to the preset monitoring time node. The second processing module is also used to determine whether to generate a heating correction command according to the real-time vacuum degree d.

[0014] In some embodiments of this application, when the first processing module generates the makeup water evaluation value a, it includes:

[0015] The total amount of makeup water to be treated and the oxygen content of makeup water to be treated are obtained based on the parameters of the makeup water to be treated.

[0016] A first initial evaluation value B1 is generated based on the total amount of makeup water to be treated.

[0017] A second initial evaluation value B2 is generated based on the oxygen content of the makeup water to be treated.

[0018] A makeup water evaluation value a is generated based on the first initial evaluation value B1 and the second initial evaluation value B2;

[0019] a = e1*B1 + e2*B2, where e1 is the preset first weight coefficient, e2 is the preset second weight coefficient, and e1 + e2 = 1.

[0020] In some embodiments of this application, when the first processing module sets the makeup water injection rate v during the initial deoxygenation stage, it includes:

[0021] The first makeup water evaluation value range (A1, A2), the second makeup water evaluation value range (A2, A3) and the third makeup water evaluation value range (A3, A4) are preset.

[0022] If the makeup water evaluation value 'a' is within the preset first makeup water evaluation value range, the makeup water injection velocity 'v' is set to the preset first makeup water injection velocity 'v1', i.e., v = v1; if the makeup water evaluation value 'a' is within the preset second makeup water evaluation value range, the makeup water injection velocity 'v' is set to the preset second makeup water injection velocity 'v2', i.e., v = v2; if the makeup water evaluation value 'a' is within the preset third makeup water evaluation value range, the makeup water injection velocity 'v' is set to the preset third makeup water injection velocity 'v3', i.e., v = v3; and v1 <v2<v3。

[0023] In some embodiments of this application, the monitoring unit includes:

[0024] The first monitoring unit includes multiple sub-vacuum monitoring modules, which are installed inside the vacuum deaerator. The first monitoring unit is used to collect real-time vacuum data inside the vacuum deaerator.

[0025] The second monitoring unit includes multiple sub-temperature monitoring modules, which are located inside the vacuum deaerator. The second monitoring unit is used to collect real-time temperature data inside the vacuum deaerator.

[0026] In some embodiments of this application, when the second processing module presets a monitoring time node, it includes:

[0027] The time interval t between adjacent monitoring time nodes is set based on the historical operating time h of the vacuum deaerator.

[0028] The first historical runtime interval (H1, H2), the second historical runtime interval (H2, H3), and the third historical runtime interval (H3, H4) are preset.

[0029] If the historical runtime h is within the preset first historical runtime interval, the time interval t is set to the preset first time interval t1, i.e., t=t1; if the historical runtime h is within the preset second historical runtime interval, the time interval t is set to the preset second time interval t2, i.e., t=t2; if the historical runtime h is within the preset third historical runtime interval, the time interval t is set to the preset third time interval t3, i.e., t=t3, and t1>t2>t3.

[0030] In some embodiments of this application, when obtaining the real-time vacuum degree d inside the vacuum deaerator according to a preset monitoring time node, the process includes:

[0031] Acquire real-time vacuum level data from each sub-vacuum monitoring module and establish an initial vacuum level sequence D, where D = (d1, d2…d…). n ), where n is the number of sub-vacuum monitoring modules, d i The vacuum level collected by the i-th sub-vacuum monitoring module;

[0032] The initial vacuum degree sequence D is preprocessed, and after removing data, a vacuum degree sequence D1 is generated, where D1 = (d'1, d'2, ..., d'). n－n1 ), where n1 is the number of abnormal data; the real-time vacuum degree d at the current monitoring time node is generated based on the vacuum degree sequence D1;

[0033] d= d'.

[0034] In some embodiments of this application, when the second processing module determines whether to generate a heating correction command based on the real-time vacuum degree d, it includes:

[0035] Obtain the preset vacuum standard value f;

[0036] If the real-time vacuum degree d is less than the preset vacuum degree standard value f, a vacuum degree difference value g is generated;

[0037] A heating temperature correction coefficient m is generated based on the vacuum degree difference g.

[0038] The first vacuum degree difference range (G1, G2) and the second vacuum degree difference range (G2, G3) are preset.

[0039] If the vacuum difference g is within a preset first vacuum difference range, the heating temperature correction coefficient m is set to the preset first heating temperature correction coefficient m1, i.e., m = m1; if the vacuum difference g is within a preset second vacuum difference range, the heating temperature correction coefficient m is set to the preset second heating temperature correction coefficient m2, i.e., m = m2; and 1 <m1<m2;

[0040] A heating correction command is generated based on the heating temperature correction coefficient m.

[0041] In some embodiments of this application, the central control unit further includes:

[0042] The operation and maintenance module is used to obtain the vacuum difference value g at the current monitoring time node. The operation and maintenance module is also used to preset the vacuum difference threshold G4, where G4>G3.

[0043] If the vacuum difference g is greater than the preset vacuum difference threshold G4, a maintenance command is generated.

[0044] Some embodiments of this application also include:

[0045] Both the vacuum deaerator and the water ring vacuum pump unit are equipped with drainage ports.

[0046] A waterproof port is provided at the bottom of the vacuum deaerator;

[0047] An electric shut-off valve is installed on the connecting pipe between the vacuum deaerator and the water ring vacuum pump unit.

[0048] Compared with the prior art, the efficient low-temperature deoxygenation system of this application has the following advantages:

[0049] By adding a vacuum deaerator, water from the low-pressure steam drum enters the vacuum deaerator through pipelines. After deoxygenation, it enters the water ring vacuum pump system through pipelines to obtain condensate as required by national standards. During the deaeration process, makeup water enters from the top of the vacuum deaerator through pipelines to ensure the normal operation of the deaeration process. Vacuum deaeration achieves deaeration at low water surface conditions (70℃ or room temperature), reducing the boiler room's self-consumption of steam. Furthermore, vacuum deaeration can utilize low-grade waste heat, allowing for the use of jet heaters to heat softened water. It also allows for staged and low-level installation, ensuring reliable deaeration and stable operation.

[0050] By setting up a two-stage deoxygenation process, a spray device is used in the primary deoxygenation stage. The spray speed is dynamically adjusted to ensure that the makeup water is heated to the maximum extent and to guarantee the deoxygenation effect. In the deep deoxygenation stage, steam is injected into the water in the deoxygenation zone to ensure that the water and steam come into full contact. Finally, the makeup water is heated to the saturation temperature under vacuum pressure, thereby achieving the deoxygenation effect. Attached Figure Description

[0051] Figure 1 is a schematic diagram of a high-efficiency low-temperature deoxygenation system in a preferred embodiment of this application. Detailed Implementation

[0052] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application.

[0053] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0054] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0055] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0056] As shown in Figure 1, a preferred embodiment of this application provides a high-efficiency low-temperature deoxygenation system, comprising:

[0057] The vacuum deaerator and water ring vacuum pump unit are connected to the low-pressure steam drum via a pipeline. The vacuum deaerator is used to remove oxygen from the makeup water to be treated. The deaerated makeup water enters the water ring vacuum pump unit through a connecting pipeline.

[0058] The central control unit is connected to the vacuum deaerator via wireless signal and is used to set the operating parameters of the vacuum deaerator.

[0059] The monitoring unit is located inside the vacuum deaerator and is used to acquire the operating parameters of the vacuum deaerator.

[0060] It also includes: both the vacuum deaerator and the water ring vacuum pump unit are equipped with condensate drain ports;

[0061] A waterproof port is located at the bottom of the vacuum deaerator;

[0062] An electric shut-off valve is installed on the connecting pipe between the vacuum deaerator and the water ring vacuum pump unit.

[0063] Specifically, makeup water enters from the top inlet of the vacuum deaerator, and the exhaust port at the top of the vacuum deaerator is connected to the water ring vacuum pump unit. The vacuum deaerator is connected to the low-pressure steam drum via pipeline. Drainage outlets are provided in both the vacuum deaerator and the water ring vacuum pump system, and an emergency drainage outlet is also provided at the bottom of the vacuum deaerator. An electrically operated shut-off valve is installed on the connecting pipeline between the vacuum deaerator and the water ring vacuum pump unit. Check valves are installed on the connecting pipeline between the vacuum deaerator and the condensate pump.

[0064] Specifically, the central control unit includes:

[0065] The first processing module is used to acquire the parameters of the makeup water to be treated and generate a makeup water evaluation value a. The first processing module is also used to set the makeup water injection rate v in the initial deoxygenation stage according to the makeup water evaluation value a.

[0066] The second processing module is used to set the heating temperature c of the deep deoxygenation stage. The second processing module is also used to preset the monitoring time node and obtain the real-time vacuum degree d in the vacuum deaerator according to the preset monitoring time node. The second processing module is also used to determine whether to generate a heating correction command based on the real-time vacuum degree d.

[0067] Specifically, vacuum deaerator deoxygenation can be divided into two stages: initial deaeration and deep deaeration. Initial deaeration: During the initial heating process, dissolved gases in the water mainly enter the gas phase through mechanical separation. Due to the large amount of dissolved gas and the significant pressure imbalance between the two phases, the gas can overcome surface tension and separate from the water in the form of small bubbles. This process removes 70%–90% of the gas in the water. This process is accomplished by a spray device, using high-flow nozzles to ensure maximum heating of the condensate. The separated gas accumulates at the top of the deaerator head and is extracted by the vacuum pump exhaust pipe along with a small amount of steam. Deep deaeration: During deep deaeration, dissolved gases in the water can only diffuse out of the water in molecular form. Because only a small amount of gas remains in the water after initial deaeration, the pressure imbalance between the vapor and liquid phases is very small, so the dissolved gases no longer have the ability to overcome surface tension and separate from the water. This process is achieved by injecting steam into the water in the deaeration zone, ensuring full contact between the water and steam, ultimately heating the makeup water to the saturation temperature under vacuum pressure.

[0068] In a preferred embodiment of this application, when the first processing module generates the makeup water evaluation value 'a', it includes:

[0069] The total amount of makeup water to be treated and the oxygen content of makeup water to be treated are obtained based on the parameters of the makeup water to be treated.

[0070] A first initial evaluation value B1 is generated based on the total amount of makeup water to be treated.

[0071] A second initial evaluation value B2 is generated based on the oxygen content of the makeup water to be treated.

[0072] The replenishment water evaluation value a is generated based on the first initial evaluation value B1 and the second initial evaluation value B2;

[0073] a = e1*B1 + e2*B2, where e1 is the preset first weight coefficient, e2 is the preset second weight coefficient, and e1 + e2 = 1.

[0074] Specifically, the larger the total amount of makeup water to be treated, the higher the corresponding first initial evaluation value; the lower the oxygen content of the makeup water to be treated, the higher the corresponding second initial evaluation value; and the first and second initial evaluation values ​​have the same range.

[0075] Specifically, when the first processing module sets the makeup water injection rate v for the initial deoxygenation stage, it includes:

[0076] The first makeup water evaluation value range (A1, A2), the second makeup water evaluation value range (A2, A3) and the third makeup water evaluation value range (A3, A4) are preset.

[0077] If the makeup water evaluation value 'a' is within the preset first makeup water evaluation value range, the makeup water injection velocity 'v' is set to the preset first makeup water injection velocity 'v1', i.e., v = v1; if the makeup water evaluation value 'a' is within the preset second makeup water evaluation value range, the makeup water injection velocity 'v' is set to the preset second makeup water injection velocity 'v2', i.e., v = v2; if the makeup water evaluation value 'a' is within the preset third makeup water evaluation value range, the makeup water injection velocity 'v' is set to the preset third makeup water injection velocity 'v3', i.e., v = v3; and v1 <v2<v3。

[0078] Specifically, in the above embodiments, the spraying speed of the spray device is dynamically adjusted by generating a makeup water evaluation value, thereby ensuring that the makeup water can be fully heated, causing the gas inside the makeup water to be released, thereby improving the deoxygenation effect.

[0079] In a preferred embodiment of this application, the monitoring unit includes:

[0080] The first monitoring unit includes multiple sub-vacuum monitoring modules, which are located inside the vacuum deaerator. The first monitoring unit is used to collect real-time vacuum data inside the vacuum deaerator.

[0081] The second monitoring unit includes multiple sub-temperature monitoring modules, which are located inside the vacuum deaerator. The second monitoring unit is used to collect real-time temperature data inside the vacuum deaerator.

[0082] Specifically, the sub-vacuum monitoring module is preferably a vacuum sensor, and the sub-temperature monitoring module is preferably a temperature sensor. Both the first and second monitoring units are located inside the vacuum deaerator to monitor parameter changes during the deaeration process and ensure deaeration efficiency.

[0083] Specifically, when the second processing module presets the monitoring time nodes, it includes:

[0084] The time interval t between adjacent monitoring time nodes is set based on the historical operating time h of the vacuum deaerator.

[0085] The first historical runtime interval (H1, H2), the second historical runtime interval (H2, H3), and the third historical runtime interval (H3, H4) are preset.

[0086] If the historical runtime h is within the preset first historical runtime interval, the time interval t is set to the preset first time interval t1, i.e., t=t1; if the historical runtime h is within the preset second historical runtime interval, the time interval t is set to the preset second time interval t2, i.e., t=t2; if the historical runtime h is within the preset third historical runtime interval, the time interval t is set to the preset third time interval t3, i.e., t=t3, and t1>t2>t3.

[0087] Specifically, the monitoring cycle is dynamically set by the historical operating time of the vacuum deaerator to monitor the vacuum level inside the vacuum deaerator in real time, so as to avoid a decrease in the deoxygenation effect caused by a drop in the vacuum level inside the vacuum deaerator.

[0088] In a preferred embodiment of this application, when obtaining the real-time vacuum degree d inside the vacuum deaerator according to a preset monitoring time node, the process includes:

[0089] Acquire real-time vacuum level data from each sub-vacuum monitoring module and establish an initial vacuum level sequence D, where D = (d1, d2…d…). n ), where n is the number of sub-vacuum monitoring modules, d i The vacuum level collected by the i-th sub-vacuum monitoring module;

[0090] The initial vacuum degree sequence D is preprocessed, and after removing data, a vacuum degree sequence D1 is generated, where D1 = (d'1, d'2, ..., d'). n－n1 ), where n1 is the number of abnormal data; the real-time vacuum degree d at the current monitoring time node is generated based on the vacuum degree sequence D1;

[0091] d= d' i .

[0092] Specifically, by setting up multiple sub-vacuum monitoring modules and comprehensively processing the data collected by each sub-vacuum monitoring module, the vacuum level inside the vacuum deaerator can be monitored more accurately, thus ensuring deaeration efficiency.

[0093] Specifically, the second processing module is also used to determine whether to generate a heating correction command based on the real-time vacuum degree d, including:

[0094] Obtain the preset vacuum standard value f;

[0095] If the real-time vacuum degree d is less than the preset vacuum degree standard value f, a vacuum degree difference value g is generated;

[0096] The heating temperature correction coefficient m is generated based on the vacuum degree difference g.

[0097] The first vacuum degree difference range (G1, G2) and the second vacuum degree difference range (G2, G3) are preset.

[0098] If the vacuum difference g is within a preset first vacuum difference range, the heating temperature correction coefficient m is set to the preset first heating temperature correction coefficient m1, i.e., m = m1; if the vacuum difference g is within a preset second vacuum difference range, the heating temperature correction coefficient m is set to the preset second heating temperature correction coefficient m2, i.e., m = m2; and 1 <m1<m2;

[0099] A heating correction command is generated based on the heating temperature correction factor m.

[0100] Specifically, when the vacuum level inside the vacuum deaerator decreases, the real-time heating temperature is adjusted in a timely manner. By setting a correction coefficient, the heating temperature is increased in a timely manner to ensure the deoxygenation effect of the deep deoxygenation process and avoid a decrease in the deoxygenation effect of the makeup water due to the decrease in vacuum level.

[0101] Specifically, the central control unit also includes:

[0102] The operation and maintenance module is used to obtain the vacuum difference value g at the current monitoring time point. The operation and maintenance module is also used to preset the vacuum difference threshold G4, where G4>G3;

[0103] If the vacuum difference g is greater than the preset vacuum difference threshold G4, a maintenance command is generated.

[0104] Specifically, the vacuum deaerator should be inspected and maintained in a timely manner according to the maintenance instructions to ensure the vacuum level inside it.

[0105] According to the first concept of this application, by adding a vacuum deaerator, water in the low-pressure steam drum enters the vacuum deaerator through pipelines, and after deoxygenation, it enters the water ring vacuum pump system through pipelines to obtain condensate as required by national standards. During the deaeration process, makeup water enters from the top of the vacuum deaerator through pipelines to ensure the normal operation of the deaeration process. Vacuum deaeration achieves deaeration at low water surface temperatures (70℃ or room temperature), reducing the boiler room's self-consumption of steam. Furthermore, vacuum deaeration can utilize low-grade waste heat, allowing for the use of jet heaters to heat softened water. It also allows for staged and low-level installation, ensuring reliable deaeration and stable operation.

[0106] According to the second concept of this application, a two-stage deoxygenation process is set up. In the primary deoxygenation stage, a spray device is used to complete the process. By dynamically adjusting the spray speed, the makeup water is heated to the maximum extent to ensure the deoxygenation effect. In the deep deoxygenation stage, steam is sprayed into the water in the deoxygenation zone to allow the water and steam to come into full contact. Finally, the makeup water is heated to the saturation temperature under vacuum pressure, thereby achieving the deoxygenation effect.

[0107] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A highly efficient low-temperature deoxygenation system, characterized in that, include: The vacuum deaerator and water ring vacuum pump unit are connected to the low-pressure steam drum via a pipeline. The vacuum deaerator is used to remove oxygen from the makeup water to be treated. The deaerated makeup water enters the water ring vacuum pump unit through a connecting pipeline. A central control unit, connected wirelessly to the vacuum deaerator, is used to set the operating parameters of the vacuum deaerator. The central control unit includes: a first processing module for acquiring parameters of the makeup water to be treated and generating a makeup water evaluation value 'a'; the first processing module is also used to set the makeup water injection rate 'v' during the initial deaeration stage based on the makeup water evaluation value 'a'; a second processing module for setting the heating temperature 'c' during the deep deaeration stage; the second processing module is also used to preset monitoring time nodes and acquire the real-time vacuum degree 'd' within the vacuum deaerator based on the preset monitoring time nodes; the second processing module is also used to determine whether to generate a heating correction command based on the real-time vacuum degree 'd'; the preset monitoring time node further includes: setting the time interval 't' between adjacent monitoring time nodes based on the historical operating time 'h' of the vacuum deaerator; and preset the first historical... The historical running time intervals are (H1, H2), the second historical running time interval (H2, H3), and the third historical running time interval (H3, H4). If the historical running time h is within the preset first historical running time interval, the time interval t is set to the preset first time interval t1, i.e., t = t1. If the historical running time h is within the preset second historical running time interval, the time interval t is set to the preset second time interval t2, i.e., t = t2. If the historical running time h is within the preset third historical running time interval, the time interval t is set to the preset third time interval t3, i.e., t = t3, and t1 > t2 > t3. When obtaining the real-time vacuum degree d in the vacuum deaerator according to the preset monitoring time node, it includes: obtaining the real-time vacuum degree data of each sub-vacuum monitoring module, and establishing an initial vacuum degree sequence D, D = (d1, d2…d4). n ), where n is the number of sub-vacuum monitoring modules, d i The initial vacuum degree sequence D is collected by the i-th sub-vacuum monitoring module; the initial vacuum degree sequence D is preprocessed, and after removing data, a vacuum degree sequence D1 is generated, where D1 = (d'1, d'2, ..., d'). n－n1 ), where n1 is the number of abnormal data; the real-time vacuum degree d at the current monitoring time point is generated based on the vacuum degree sequence D1; d = d' i A monitoring unit, located inside the vacuum deaerator, is used to acquire the operating parameters of the vacuum deaerator. The monitoring unit includes: a first monitoring section comprising multiple sub-vacuum monitoring modules, each located inside the vacuum deaerator, the first monitoring section being used to collect real-time vacuum level data inside the vacuum deaerator; and a second monitoring section comprising multiple sub-temperature monitoring modules, each located inside the vacuum deaerator, the second monitoring section being used to collect temperature data inside the vacuum deaerator. Real-time temperature data; when the first processing module sets the makeup water injection rate v during the initial deoxygenation stage, it includes: presetting a first makeup water evaluation value range (A1, A2), a second makeup water evaluation value range (A2, A3), and a third makeup water evaluation value range (A3, A4); if the makeup water evaluation value a is within the preset first makeup water evaluation value range, the makeup water injection rate v is set to the preset first makeup water injection rate v1, i.e., v = v1; if the makeup water evaluation value a is within the preset second makeup water evaluation range, the makeup water injection rate v is set to v1. The second makeup water injection speed is preset to v2, i.e., v = v2; if the makeup water evaluation value a is within the preset third makeup water evaluation value range, the makeup water injection speed v is set to the preset third makeup water injection speed v3, i.e., v = v3; and v1 < v2 < v3; the second processing module is also used to determine whether to generate a heating correction command based on the real-time vacuum degree d, including: obtaining a preset vacuum degree standard value f; if the real-time vacuum degree d is less than the preset vacuum degree standard value f, generating a vacuum degree difference g; generating a heating temperature correction command based on the vacuum degree difference g. A positive coefficient m is used; a first vacuum degree difference interval (G1, G2) and a second vacuum degree difference interval (G2, G3) are preset; if the vacuum degree difference g is within the preset first vacuum degree difference interval, the heating temperature correction coefficient m is set to the preset first heating temperature correction coefficient m1, i.e., m = m1; if the vacuum degree difference g is within the preset second vacuum degree difference interval, the heating temperature correction coefficient m is set to the preset second heating temperature correction coefficient m2, i.e., m = m2; and 1 < m1 < m2; a heating correction command is generated according to the heating temperature correction coefficient m.

2. The high-efficiency low-temperature deoxygenation system as described in claim 1, characterized in that, When the first processing module generates the makeup water evaluation value 'a', it includes: obtaining the total amount of makeup water to be treated and the oxygen content of makeup water to be treated based on the makeup water parameters; generating a first initial evaluation value B1 based on the total amount of makeup water to be treated; generating a second initial evaluation value B2 based on the oxygen content of makeup water to be treated; and generating the makeup water evaluation value 'a' based on the first initial evaluation value B1 and the second initial evaluation value B2; a = e1 * B1 + e2 * B2, where e1 is a preset first weighting coefficient, e2 is a preset second weighting coefficient, and e1 + e2 = 1.

3. The high-efficiency low-temperature deoxygenation system as described in claim 1, characterized in that, The central control unit further includes an operation and maintenance module, which is used to obtain the vacuum difference value g at the current monitoring time node. The operation and maintenance module is also used to preset a vacuum difference threshold G4, where G4 > G3. If the vacuum difference value g is greater than the preset vacuum difference threshold G4, a maintenance command is generated.

4. The high-efficiency low-temperature deoxygenation system as described in claim 1, characterized in that, Also includes: Both the vacuum deaerator and the water ring vacuum pump unit are equipped with drainage ports; a waterproof port is located at the bottom of the vacuum deaerator; and an electric shut-off valve is located on the connecting pipe between the vacuum deaerator and the water ring vacuum pump unit.

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