Boiler deaerator temperature control system
By installing electric regulating valves and ejectors in the boiler deaerator, the steam flow and mixing are automatically adjusted, solving the problems of temperature stratification of deoxygenated water and energy waste, and achieving efficient deoxygenation and energy saving.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-03-03
AI Technical Summary
Existing boiler deaerators suffer from temperature stratification of deoxygenated water during operation, leading to air reabsorption and significant energy consumption during direct steam injection heating.
An electric regulating valve and a temperature sensor are installed on the steam pipeline. The electric regulating valve is connected to a controller to automatically adjust the steam flow rate according to the temperature of the deoxygenated water. An ejector is installed in the deaerator to ensure that the steam and liquid are fully mixed and to avoid temperature gradients.
While achieving deoxygenation, it reduces energy consumption, ensures uniform temperature and boiling state of deoxygenated water, and improves deoxygenation efficiency.
Smart Images
Figure CN223965382U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of deaerator bottom temperature control technology, and in particular to a boiler deaerator temperature control system. Background Technology
[0002] During operation, boiler deaerators often experience temperature stratification of the deaerated water, leading to the reabsorption of air into the deaerated water. Direct steam injection heating, which eliminates the need for heat exchange surfaces, steam traps, and condensate recovery, is typically used in the bottom deaeration system of deaerators to ensure the bottom water temperature meets deaeration requirements. However, in direct steam injection heating, the steam condensation rate is directly proportional to the temperature difference between the steam and the deaerated water. Therefore, controlling the deaerated water temperature to the minimum required temperature for the deaeration process ensures effective deaeration while reducing energy consumption. Utility Model Content
[0003] In view of the above-mentioned defects or deficiencies in the prior art, the present invention provides a boiler deaerator temperature control system to ensure deaeration effect while reducing energy consumption.
[0004] One aspect of this utility model provides a boiler deaerator temperature control system, comprising: a deaerator body; a steam pipe connected to the deaerator body, wherein an electric regulating valve is installed on the steam pipe; a temperature sensor installed on the deaerator body for monitoring the temperature of deoxygenated water inside the deaerator body; and a controller electrically connected to the temperature sensor and the electric regulating valve, wherein the controller is configured to control the opening degree of the electric regulating valve based on the temperature of the deoxygenated water monitored by the temperature sensor.
[0005] In some embodiments, the temperature sensor is connected to the deaerator body via a connecting pipe; one end of the connecting pipe is in communication with the deaerator body, and the other end of the connecting pipe away from the deaerator body is located outside the deaerator body and in communication with the temperature sensor.
[0006] In some embodiments, the steam pipeline is further provided with a first shut-off valve and a second shut-off valve, and the electric regulating valve is located between the first shut-off valve and the second shut-off valve.
[0007] In some embodiments, a filter valve is also provided on the steam pipeline, the filter valve being located between the first shut-off valve and the electric regulating valve, wherein the filter valve is located upstream of the electric regulating valve.
[0008] In some embodiments, the first shut-off valve is located upstream of the second shut-off valve; the boiler deaerator temperature control system further includes a bypass pipeline and a third shut-off valve disposed on the bypass pipeline, one end of the bypass pipeline is located upstream of the first shut-off valve, and the other end of the bypass pipeline is located downstream of the second shut-off valve, wherein the first shut-off valve is located upstream of the second shut-off valve.
[0009] In some embodiments, the boiler deaerator temperature control system further includes an injector disposed within the deaerator body and connected to the outlet end of the steam pipe.
[0010] In some embodiments, the injector is located at the bottom of the deaerator body.
[0011] In some embodiments, a vacuum breaker is also provided on the steam pipe, the vacuum breaker being located between the electric regulating valve and the ejector.
[0012] In some embodiments, a pressure gauge is also provided on the steam pipe, and the pressure gauge is located between the electric regulating valve and the vacuum breaker.
[0013] In some embodiments, the boiler deaerator temperature control system further includes a water supply pipe connected to the deaerator body for supplying water to the deaerator body. The water supply pipe is equipped with a solenoid valve. A water level detector is installed in the deaerator body. The water level detector and the solenoid valve are electrically connected to the controller. The controller is further configured to control the solenoid valve to open or close based on the water level detected by the water level detector in the deaerator body.
[0014] The boiler deaerator temperature control system provided by this utility model has the following beneficial effects:
[0015] (1) By installing an electric regulating valve on the steam pipeline and a temperature sensor on the deaerator body, the controller is electrically connected to the temperature sensor and the electric regulating valve. The controller controls the opening degree of the electric regulating valve based on the deoxygenated water temperature monitored by the temperature sensor. This can control the deoxygenated water temperature in the deaerator body to the minimum required temperature for the deoxygenation process, ensuring the deoxygenation effect of the boiler while maintaining the deoxygenated water in a boiling state, thus reducing energy consumption.
[0016] (2) An ejector is installed at the outlet end of the steam pipe. The high-pressure steam ejected from the ejector can fully mix the steam and liquid, realize the stirring and circulation of the deoxygenated water, ensure that no temperature gradient is generated in the boiler deaerator, keep the water temperature uniform, and thus ensure the deoxygenation effect. Attached Figure Description
[0017] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0018] Figure 1 This is a schematic diagram of the structure of a boiler deaerator temperature control system provided in one embodiment of this application;
[0019] Figure 2 This is a partial structural schematic diagram of a boiler deaerator temperature control system provided in one embodiment of this application;
[0020] Figure 3 This is a schematic diagram of the structure of a temperature sensor in a boiler deaerator temperature control system provided in one embodiment of this application;
[0021] Figure 4 This is a schematic diagram of the ejector structure of a boiler deaerator temperature control system provided in one embodiment of this application.
[0022] icon:
[0023] Boiler deaerator temperature control system 100; Steam pipe 1; First shut-off valve 2; Filter valve 3; Electric regulating valve 4; Pressure gauge 5; Controller 6; Vacuum breaker 7; Temperature sensor 8; Feed water pipe 9; Deaerator body 10; Ejector 11; Connecting pipe 12; Second shut-off valve 13; Bypass pipe 14; Third shut-off valve 15. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0025] The terminology used in the embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The singular forms "a," "the," and "the" as used in the embodiments of this utility model are also intended to include the plural forms unless the context clearly indicates otherwise.
[0026] It should be understood that although the terms first, second, third, etc., may be used to describe the acquisition modules in the embodiments of this utility model, these acquisition modules should not be limited to these terms. These terms are only used to distinguish the acquisition modules from each other.
[0027] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to monitoring." Similarly, depending on the context, the phrases "if determination" or "if monitoring (the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when monitoring (the stated condition or event)," or "in response to monitoring (the stated condition or event)."
[0028] It should be noted that the directional terms such as "upper," "lower," "left," and "right" used in the description of the embodiments of this utility model are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this utility model. In addition, in the context, it should also be understood that when it is mentioned that an element is formed "upper" or "lower" of another element, it can not only be formed directly "upper" or "lower" of the other element, but also indirectly "upper" or "lower" of the other element through an intermediate element.
[0029] Reference Figures 1 to 4 This utility model provides a boiler deaerator temperature control system 100 for boilers, including a deaerator body 10, a steam pipe 1, a temperature sensor 8, a controller 6, and an electric regulating valve 4.
[0030] Steam pipe 1 is connected to deaerator body 10 and is used to introduce steam into deaerator body 10.
[0031] An electric regulating valve 4 is installed on the steam pipeline 1. By adjusting the opening of the electric regulating valve 4, the flow rate of steam introduced into the deaerator body 10 can be controlled.
[0032] Temperature sensor 8 is installed in the deaerator body 10 to monitor the temperature of the deoxygenated water inside the deaerator body 10. Temperature sensor 8 can be installed inside or outside the deaerator body 10.
[0033] The controller 6 is electrically connected to the temperature sensor 8 and the electric regulating valve 4. The controller 6 is configured to control the opening degree of the electric regulating valve 4 based on the deoxygenated water temperature monitored by the temperature sensor 8.
[0034] For example, when the temperature of the deoxygenated water inside the deaerator body 10 is lower than the operating temperature (e.g., 98°C), the temperature sensor 8 transmits the monitored temperature signal to the controller 6. Simultaneously, the controller 6 sends a control signal to the electric regulating valve 4. Based on the control signal, the electric regulating valve 4 increases its opening to increase the flow rate of steam supplied to the deaerator body 10. Conversely, when the temperature of the deoxygenated water inside the deaerator body 10 is higher than the operating temperature (e.g., 98°C), the temperature sensor 8 transmits the monitored temperature signal to the controller 6. Simultaneously, the controller 6 sends a control signal to the electric regulating valve 4. Based on the control signal, the electric regulating valve 4 decreases its opening to reduce the flow rate of steam supplied to the deaerator body 10. This allows the temperature of the deoxygenated water inside the deaerator body 10 to be controlled to the minimum required temperature for the deaeration process, ensuring the boiler's deaeration effect while maintaining the deoxygenated water in a boiling state, thus reducing energy consumption.
[0035] In some embodiments, the temperature sensor 8 is connected to the deaerator body 10 via a connecting pipe 12. One end of the connecting pipe 12 is connected to the deaerator body 10, and the other end of the connecting pipe 12 away from the deaerator body 10 is located outside the deaerator body 10 and is connected to the temperature sensor 8.
[0036] Temperature sensor 8 is connected to deaerator body 10 via connecting pipe 12, allowing for more accurate monitoring of deoxygenated water temperature. This enables efficient control of the deoxygenated water temperature within deaerator body 10 to the minimum required temperature for the deaeration process, ensuring boiler deaeration while maintaining the deoxygenated water at a boiling state, thus reducing energy consumption. Furthermore, the end of connecting pipe 12 furthest from deaerator body 10 is located outside of deaerator body 10 and connected to temperature sensor 8. This external location of temperature sensor 8 facilitates maintenance and replacement, and extends its service life.
[0037] In some embodiments, a first shut-off valve 2 and a second shut-off valve 13 are also provided on the steam pipeline 1, and an electric regulating valve 4 is located between the first shut-off valve 2 and the second shut-off valve 13.
[0038] When the electric regulating valve 4 needs maintenance, the first shut-off valve 2 and the second shut-off valve 13 can be closed to disconnect the steam flow path in the steam pipeline 1.
[0039] A first shut-off valve 2 and a second shut-off valve 13 are installed on the steam pipeline 1, and an electric regulating valve 4 is located between the first shut-off valve 2 and the second shut-off valve 13, which facilitates the installation and maintenance of the electric regulating valve 4 and improves convenience and safety.
[0040] In some embodiments, a filter valve 3 is also provided on the steam pipe 1. The filter valve 3 is located between the first shut-off valve 2 and the electric regulating valve 4, wherein the filter valve 3 is located upstream of the electric regulating valve 4.
[0041] The filter valve 3 can filter impurities in the steam pipeline 1, reducing the risk of impurities entering the electric regulating valve 4, thereby extending the service life of the electric regulating valve 4 and ensuring reliable operation.
[0042] In some embodiments, the first shut-off valve 2 is located upstream of the second shut-off valve 13; the boiler deaerator temperature control system 100 also includes a bypass pipe 14 and a third shut-off valve 15 disposed on the bypass pipe 14, one end of the bypass pipe 14 is located upstream of the first shut-off valve 2, and the other end of the bypass pipe 14 is located downstream of the second shut-off valve 13.
[0043] When the electric regulating valve 4 fails or is replaced or repaired, the third shut-off valve 15 on the bypass line 14 can be opened, so that the steam in the steam pipeline 1 can continue to supply steam to the deaerator body 10 through the bypass line 14, ensuring that the boiler deaerator temperature control system 100 can work continuously.
[0044] In some embodiments, the boiler deaerator temperature control system 100 further includes an injector 11, which is disposed within the deaerator body 10 and connected to the outlet end of the steam pipe 1.
[0045] The high-pressure steam ejected from the ejector 11 can fully mix the steam and liquid, achieving agitation and circulation of the deoxygenated water, ensuring that no temperature gradient is generated in the boiler deaerator, keeping the water temperature uniform, and thus ensuring the deaeration effect.
[0046] In some embodiments, the injector 11 is located at the bottom of the deaerator body 10.
[0047] The ejector 11 is located at the bottom of the deaerator body 10, which enables more thorough mixing and circulation of the deoxygenated water, further ensuring that no temperature gradient is generated in the boiler deaerator, thereby ensuring the deoxygenation effect.
[0048] In some embodiments, a vacuum breaker 7 is also provided on the steam pipe 1, and the vacuum breaker 7 is located between the electric regulating valve 4 and the ejector 11.
[0049] The vacuum breaker 7 is used to break the vacuum effect generated when the steam pipeline 1 or the deaerator body 10 is running or stopped, thereby protecting the boiler deaerator temperature control system 100.
[0050] In some embodiments, a pressure gauge 5 is also provided on the steam pipe 1, and the pressure gauge 5 is located between the electric regulating valve 4 and the vacuum breaker 7.
[0051] Pressure gauge 5 allows for real-time monitoring of the pressure in steam pipeline 1 or deaerator body 10, enabling timely detection and handling of any abnormalities.
[0052] In some embodiments, the boiler deaerator temperature control system 100 further includes a water supply pipe 9, which is connected to the deaerator body 10 and is used to replenish water to the deaerator body 10. A solenoid valve (not shown) is installed on the water supply pipe 9. The boiler deaerator temperature control system 100 also includes a water level detector (not shown), which is installed inside the deaerator body 10. The water level detector and the solenoid valve are electrically connected to a controller 6. The controller 6 is further configured to control the solenoid valve to open or close based on the water level detected by the water level detector inside the deaerator body 10.
[0053] For example, when the water level in the deaerator body 10 is lower than the preset height, the water level detector sends a signal to the controller 6, and at the same time, the controller 6 sends a signal to the solenoid valve, which opens and replenishes water into the deaerator body 10; when the water level in the deaerator body 10 is higher than or equal to the preset height, the water level detector sends a signal to the controller 6, and at the same time, the controller 6 sends a signal to the solenoid valve, which closes and stops replenishing water into the deaerator body 10.
[0054] Steam pipe 1, water supply pipe 9, and ejector 11 are all made of 304 stainless steel to ensure that the pipes will not rust or generate iron ions.
[0055] The above description is merely a preferred embodiment of this utility model. Those skilled in the art should understand that the scope of disclosure involved in this utility model is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalent features without departing from the above-described concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this utility model.
Claims
1. A boiler deaerator temperature control system, characterized in that, include: Deaerator body; A steam pipe is connected to the deaerator body, and an electric regulating valve is installed on the steam pipe; A temperature sensor is installed on the deaerator body to monitor the temperature of the deoxygenated water inside the deaerator body. A controller, electrically connected to the temperature sensor and the electric regulating valve, is configured to control the opening degree of the electric regulating valve based on the temperature of the deoxygenated water monitored by the temperature sensor.
2. The boiler deaerator temperature control system according to claim 1, characterized in that, The temperature sensor is connected to the deaerator body via a connecting pipe; One end of the connecting pipe is connected to the deaerator body, and the other end of the connecting pipe away from the deaerator body is located outside the deaerator body and connected to the temperature sensor.
3. The boiler deaerator temperature control system according to claim 1, characterized in that, The steam pipeline is also equipped with a first shut-off valve and a second shut-off valve, and the electric regulating valve is located between the first shut-off valve and the second shut-off valve.
4. The boiler deaerator temperature control system according to claim 3, characterized in that, A filter valve is also installed on the steam pipeline. The filter valve is located between the first shut-off valve and the electric regulating valve, wherein the filter valve is located upstream of the electric regulating valve.
5. The boiler deaerator temperature control system according to claim 3, characterized in that, The first shut-off valve is located upstream of the second shut-off valve; The deaerator also includes a bypass pipeline and a third shut-off valve disposed on the bypass pipeline. One end of the bypass pipeline is located upstream of the first shut-off valve, and the other end of the bypass pipeline is located downstream of the second shut-off valve.
6. The boiler deaerator temperature control system according to any one of claims 1-5, characterized in that, The boiler deaerator temperature control system also includes: The ejector is located inside the deaerator body and is connected to the outlet end of the steam pipe.
7. The boiler deaerator temperature control system according to claim 6, characterized in that, The injector is located at the bottom of the deaerator body.
8. The boiler deaerator temperature control system according to claim 6, characterized in that, A vacuum breaker is also installed on the steam pipeline, and the vacuum breaker is located between the electric regulating valve and the ejector.
9. The boiler deaerator temperature control system according to claim 8, characterized in that, A pressure gauge is also installed on the steam pipeline, and the pressure gauge is located between the electric regulating valve and the vacuum breaker.
10. The boiler deaerator temperature control system according to claim 1, characterized in that, The boiler deaerator temperature control system also includes: A water supply pipe is connected to the deaerator body and is used to replenish water to the deaerator body. A solenoid valve is installed on the water supply pipe. A water level detector is installed inside the deaerator body. The water level detector and the solenoid valve are electrically connected to the controller. The controller is also configured to control the solenoid valve to open or close based on the water level inside the deaerator body detected by the water level detector.