Non-condensable gas on-line detection device

Abstract

The utility model relates to a non-condensable gas on-line detection device which comprises a heat exchanger, a non-condensable gas collection tank, a condensed water collection tank, a detection piece and a controller, and an inlet of the heat exchanger is used for being connected with a steam source; the non-condensable gas collecting tank is provided with a first liquid inlet, an exhaust port and a first liquid outlet, and an outlet of the heat exchanger is connected to the first liquid inlet; the condensed water collecting tank is provided with a second liquid inlet communicated with the first liquid outlet; the detection piece is used for detecting a first liquid level value in the condensed water collection tank when the exhaust port is opened, the first liquid discharge port is opened and the first liquid inlet is opened, and detecting a second liquid level value in the condensed water collection tank when the exhaust port is closed and the first liquid inlet is closed; detecting a third liquid level value in the non-condensable gas collecting tank when the first liquid inlet is closed, the first liquid outlet is closed and the exhaust port is opened; the controller is in communication connection with the detection part, and the detection part transmits the first liquid level value, the second liquid level value and the third liquid level value to the controller so that the controller can calculate the content of non-condensable gas in the steam.

Description

Technical Field

[0001] This application relates to the field of online detection technology, and in particular to an online detection device for non-condensable gases. Background Technology

[0002] Non-condensable gases are gases that cannot be liquefied in a condenser under certain temperature and pressure conditions. In related technologies, gas analyzers are typically used to measure the gaseous components in pure steam in real time and calculate the content of non-condensable gases. However, gas analyzers cannot perform online detection, offline detection data is limited, and there may be sampling errors and secondary contamination, thus affecting the accuracy of the data. Utility Model Content

[0003] Therefore, it is necessary to provide an online non-condensable gas detection device to address the issue of online non-condensable gas detection.

[0004] An online noncondensable gas detection device, the online noncondensable gas detection device comprising:

[0005] A heat exchanger, wherein the inlet of the heat exchanger is for connection to a steam source;

[0006] A non-condensable gas collection tank has a first liquid inlet, a vent, and a first liquid outlet, and the outlet of the heat exchanger is connected to the first liquid inlet;

[0007] The condensate collection tank has a second inlet that is connected to the first drain outlet;

[0008] The detection device is used to detect the first liquid level value in the condensate collection tank when the exhaust port is open, the first drain port is open, and the first inlet port is open; to detect the second liquid level value in the condensate collection tank when the exhaust port is closed and the first inlet port is closed; and to detect the third liquid level value in the non-condensable gas collection tank when the first inlet port is closed, the first drain port is closed, and the exhaust port is open.

[0009] The controller is communicatively connected to the detection element, which transmits the first liquid level value, the second liquid level value, and the third liquid level value to the controller so that the controller can calculate the non-condensable gas content in the steam.

[0010] In one embodiment, the first drain port and the second inlet port are connected by a first pipeline, and the detection element is a pressure sensor, which is installed on the first pipeline.

[0011] In one embodiment, a first drain valve is provided on the first pipeline, which is used to control the connection or closure of the first pipeline.

[0012] In one embodiment, the noncondensable gas collection tank is provided with an exhaust valve, which is used to control the opening or closing of the exhaust port.

[0013] In one embodiment, a recycling tank is also included, and the condensate collection tank has a second drain outlet connected to the recycling tank via a second pipeline.

[0014] In one embodiment, a second drain valve is provided on the second pipeline, which is used to control the connection or closure of the second pipeline.

[0015] In one embodiment, the outlet of the heat exchanger and the first liquid inlet are connected by a third pipeline, on which a temperature sensor is installed.

[0016] In one embodiment, the device further includes an orifice plate and an inlet pipe, the orifice plate being connected to the inlet of the heat exchanger via the inlet pipe, and one end of the orifice plate facing away from the inlet pipe being connected to the steam source.

[0017] In one embodiment, a control valve is provided on the intake pipe, the control valve being used to control the opening or closing of the intake pipe.

[0018] In one embodiment, the condensate collection tank has an opening that communicates with the outside.

[0019] The aforementioned online non-condensable gas detection device connects the inlet of the heat exchanger to a steam source and the outlet of the heat exchanger to the first inlet of the non-condensable gas collection tank. The condensate generated by the heat exchanger enters the non-condensable gas collection tank. When the exhaust port, the first drain port, and the first inlet of the non-condensable gas collection tank are all open, the non-condensable gas in the tank is discharged through the exhaust port, while some of the condensate flows into the condensate collection tank. The non-condensable gas collection tank and the condensate collection tank form a communicating vessel due to the connection between the first drain port and the second inlet, causing the liquid levels in both tanks to be the same. The first liquid level value detected by the detection device at this time is the initial liquid level value of the non-condensable gas collection tank and the condensate collection tank. After a certain period, the exhaust port and the first inlet are closed. At this time, the non-condensable gas in the non-condensable gas collection tank cannot be discharged, and the liquid level in the non-condensable gas collection tank will change accordingly. As non-condensable gases accumulate and the level gradually decreases, the liquid level in the condensate collection tank gradually rises. At this point, the detection device detects the second liquid level value in the condensate collection tank. After a certain period of time, the first inlet and the first outlet are closed, and the exhaust port is opened. At this time, the non-condensable gases in the non-condensable gas collection tank are discharged through the exhaust port, and the liquid level in the non-condensable gas collection tank drops. The detection device then detects the third liquid level in the non-condensable gas collection tank. The detection device transmits the detected first, second, and third liquid level values ​​to the controller. The controller calculates the content of non-condensable gases in the steam based on the obtained first, second, and third liquid level values ​​and the calculation formula. The non-condensable gas online detection device of this application only uses the detection device to detect the liquid level information three times to calculate the content of non-condensable gases in the steam. Moreover, online detection eliminates the need for manual sampling and avoids sample contamination, thus improving the accuracy of the detection data. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the online noncondensable gas detection device provided in the embodiments of this application.

[0021] In the picture:

[0022] 100. Heat exchanger; 110. Third piping; 120. Temperature sensor;

[0023] 200. Non-condensable gas collection tank; 210. Exhaust pipeline; 220. Exhaust valve;

[0024] 300. Condensate collection tank;

[0025] 400. Inspection items;

[0026] 500, First pipeline; 510, First drain valve;

[0027] 600, Second pipeline; 610, Second drain valve;

[0028] 700, perforated plate;

[0029] 800, intake pipe; 810, control valve. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0036] This application provides an online non-condensable gas detection device, such as... Figure 1 As shown, the online non-condensable gas detection device includes a heat exchanger 100, a non-condensable gas collection tank 200, a condensate collection tank 300, a detection element 400, and a controller. The inlet of the heat exchanger 100 is used to connect to a steam source; the non-condensable gas collection tank 200 has a first inlet, an outlet, and a first drain outlet, and the outlet of the heat exchanger 100 is connected to the first inlet; the condensate collection tank 300 has a second inlet communicating with the first drain outlet; the detection element 400 is used to detect when the outlet is open, when the first drain outlet is open, and when the non-condensable gas collection tank is closed. The controller detects the first liquid level value in the condensate collection tank 300 when the first inlet is open, the second liquid level value in the condensate collection tank 300 when the exhaust port is closed and the first inlet is closed, and the third liquid level value in the non-condensable gas collection tank 200 when the first inlet is closed, the first outlet is closed and the exhaust port is open; the controller is communicatively connected to the detection element 400, and the detection element 400 transmits the first liquid level value, the second liquid level value and the third liquid level value to the controller so that the controller can calculate the non-condensable gas content in the steam.

[0037] The above-mentioned online non-condensable gas detection device connects the inlet of the heat exchanger 100 to the steam source and the outlet of the heat exchanger 100 to the first liquid inlet of the non-condensable gas collection tank 200. The steam condensate generated by heat exchange in the heat exchanger 100 enters the non-condensable gas collection tank 200. When the vent, first drain port, and first inlet of the non-condensable gas collection tank 200 are all open, the non-condensable gas in the non-condensable gas collection tank 200 is discharged through the vent, while some of the condensate in the non-condensable gas collection tank 200 flows into the condensate collection tank 300. The non-condensable gas collection tank 200 and the condensate collection tank 300 form a communicating vessel because the first drain port and the second inlet are connected. The liquid levels in the non-condensable gas collection tank 200 and the condensate collection tank 300 will be the same. At this time, the first liquid level value detected by the detection element 400 is the initial liquid level value of the non-condensable gas collection tank 200 and the condensate collection tank 300. After a certain period of time, the vent and the first inlet are closed. At this time, the non-condensable gas in the non-condensable gas collection tank 200 cannot be discharged, and the non-condensable gas collection tank... The liquid level in the non-condensable gas collection tank 200 will gradually decrease due to the presence of non-condensable gases, while the liquid level in the condensate collection tank 300 will gradually increase. At this time, the detection element 400 detects the second liquid level value of the condensate collection tank 300. After a certain period of time, the first inlet and the first outlet are closed, and the exhaust port is opened. At this time, the non-condensable gases in the non-condensable gas collection tank 200 are discharged through the exhaust port, and the liquid level in the non-condensable gas collection tank 200 decreases. The detection element 400 then detects the third liquid level of the non-condensable gas collection tank 200. The detection element 400 transmits the detected first, second, and third liquid level values ​​to the controller. The controller calculates the content of non-condensable gases in the steam based on the obtained first, second, and third liquid level values ​​and the calculation formula. The non-condensable gas online detection device of this application only uses the detection element 400 to detect the liquid level information three times to calculate the content of non-condensable gases in the steam. Moreover, online detection eliminates the need for manual sampling and avoids sample contamination, thus improving the accuracy of the detection data.

[0038] It should be noted that non-condensable gases refer to gases that cannot be liquefied in the condensation unit. Therefore, the non-condensable gas content in the steam is calculated as follows: the newly added non-condensable gas content divided by the newly added condensate content. By calculating the first, second, and third liquid level values, and subtracting the first liquid level value from the second liquid level value, the newly added condensate level difference is obtained. Then, based on the pressure difference and density, the newly added condensate level value is converted into volume, thus yielding the newly added condensate content. Subtracting the third liquid level value from the first liquid level value gives the liquid level difference corresponding to the non-condensable gas flowing out of the non-condensable gas collection tank 200. This liquid level difference is then converted into volume to obtain the newly added non-condensable gas content.

[0039] Specifically, the condensate collection tank 300 has an opening that connects to the outside. By setting an opening on the condensate collection tank 300, the tank body of the condensate collection tank 300 is connected to the outside, so that the non-condensable gas in the condensate collection tank 300 can be directly discharged to the outside. The liquid level in the condensate collection tank 300 will only change due to the addition of condensate, thereby improving the detection accuracy.

[0040] Specifically, such as Figure 1 As shown, the non-condensable gas collection tank 200 is equipped with an exhaust valve 220, which is used to control the opening or closing of the exhaust port. By installing the exhaust valve 220 on the non-condensable gas collection tank 200 and controlling the opening or closing of the exhaust port through the exhaust valve 220, the first liquid level value, the second liquid level value, and the third liquid level value can be detected.

[0041] More specifically, such as Figure 1 As shown, the exhaust port is connected to the outside through the exhaust pipe 210, and an exhaust valve 220 is installed on the exhaust pipe 210.

[0042] More specifically, the exhaust valve 220 is communicatively connected to the controller.

[0043] Specifically, such as Figure 1 As shown, the first drain port and the second inlet port are connected through the first pipeline 500. The detection element 400 is a pressure sensor, which is installed on the first pipeline 500. By connecting the first drain port and the second inlet port through the first pipeline 500, condensate in the non-condensable gas collection tank 200 can flow into the condensate collection tank 300 through the first pipeline 500. The pressure sensor installed on the first pipeline 500 allows for the detection of the first, second, and third liquid level values ​​using only one sensor, simplifying the detection process.

[0044] It should be noted that the principle of pressure sensor detection of liquid level is mainly based on the correspondence between liquid pressure and liquid level. The pressure sensor is installed in the first pipeline 500. When the liquid level in the non-condensable gas collection tank 200 or the condensate collection tank 300 changes, the liquid pressure on the pressure sensor will also change accordingly. The pressure sensor converts the sensed pressure change into an electrical signal, such as voltage or current. By measuring the magnitude of the electrical signal and applying the pre-calibrated correspondence between pressure and liquid level, the liquid level can be determined, thus detecting the liquid level value.

[0045] Specifically, such as Figure 1 As shown, a first drain valve 510 is provided on the first pipeline 500. The first drain valve 510 is used to control the connection or closure of the first pipeline 500. By providing the first drain valve 510, the connection or closure of the first drain port and the second inlet port can be controlled by opening or closing the first drain valve 510.

[0046] More specifically, the first drain valve 510 is communicatively connected to the controller.

[0047] More specifically, such as Figure 1 As shown, the detection element 400 is positioned between the first drain valve 510 and the second inlet.

[0048] Specifically, such as Figure 1 As shown, the online non-condensable gas detection device also includes a recovery tank. The condensate collection tank 300 has a second drain port, which is connected to the recovery tank via a second pipeline 600. By setting up the recovery tank, the condensate in the condensate collection tank 300 can be discharged into the recovery tank through the second pipeline 600. After complete discharge, the detection operation can be performed again.

[0049] More specifically, such as Figure 1 As shown, a second drain valve 610 is installed on the second pipeline 600. The second drain valve 610 is used to control the connection or closure of the second pipeline 600. By installing the second drain valve 610 on the second pipeline 600, when it is necessary to discharge the condensate in the condensate collection tank 300, the second drain valve 610 is opened, which is equivalent to opening the second drain port. The condensate in the condensate collection tank 300 is then discharged into the recovery tank through the second pipeline 600.

[0050] More specifically, such as Figure 1 As shown, the second drain valve 610 is communicatively connected to the controller.

[0051] Furthermore, such as Figure 1 As shown, the outlet of the heat exchanger 100 and the first inlet are connected through a third pipe 110, on which a temperature sensor 120 is installed. By installing the temperature sensor 120 on the third pipe 110, the temperature of the condensate in the third pipe 110 is detected.

[0052] Specifically, such as Figure 1 As shown, the temperature sensor 120 is connected to the controller. The temperature sensor 120 transmits the detected real-time temperature value to the controller. The controller compares the real-time temperature value with the preset temperature value and determines whether the steam condensate after heat exchange in the heat exchanger 100 meets the detection requirements based on the comparison result.

[0053] More specifically, when making a judgment, if the real-time temperature value is less than the preset temperature value, it is determined that the steam condensate after heat exchange in heat exchanger 100 does not meet the detection requirements. At this time, the accuracy of the detection is low. The exhaust port, the first drain port and the second drain port can be opened first to discharge the current steam condensate into the recovery tank until the real-time temperature value is equal to the preset temperature value. Then the second drain port is closed for detection.

[0054] Furthermore, such as Figure 1 As shown, the online non-condensable gas detection device also includes an orifice plate 700 and an inlet pipe 800. The orifice plate 700 is connected to the inlet of the heat exchanger 100 via the inlet pipe 800, and the end of the orifice plate 700 facing away from the inlet pipe 800 is used to connect to a steam source. By setting the orifice plate 700, the orifice plate 700 is connected to the inlet of the heat exchanger 100 via the inlet pipe 800. The steam from the steam source is depressurized after passing through the orifice plate 700 and then flows into the heat exchanger 100 through the inlet pipe 800.

[0055] Specifically, the perforated plate 700 is a plate-shaped component with a small aperture.

[0056] It should be noted that the principle of the orifice plate 700 is based on Bernoulli's principle, which states that velocity is inversely proportional to pressure. When liquid or gas passes through the orifice plate 700, the flow velocity increases while the pressure decreases, creating a pressure difference and achieving a pressure relief effect.

[0057] Specifically, such as Figure 1 As shown, a control valve 810 is installed on the intake pipe 800. The control valve 810 is used to control the opening or closing of the intake pipe 800. By installing the control valve 810 on the intake pipe 800, the overall intake can be controlled to open or close.

[0058] More specifically, control valve 810 is communicatively connected to the controller.

[0059] Understandably, when detecting the first liquid level, control valve 810 is open, and steam from the steam source flows into heat exchanger 100 through inlet pipe 800. When detecting the second and third liquid level, control valve 810 is closed, preventing steam from flowing into non-condensable gas collection tank 200 and condensate collection tank 300, thus reducing the impact of excess non-condensable gas or condensate on detection accuracy.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An online noncondensable gas detection device, characterized in that, The online noncondensable gas detection device includes: A heat exchanger (100), the inlet of which is used to connect to a steam source; The non-condensable gas collection tank (200) has a first liquid inlet, a vent, and a first liquid outlet, and the outlet of the heat exchanger (100) is connected to the first liquid inlet; A condensate collection tank (300) has a second inlet connected to the first drain outlet; The detection element (400) is used to detect the first liquid level value in the condensate collection tank (300) when the exhaust port is open, the first drain port is open, and the first inlet port is open; to detect the second liquid level value in the condensate collection tank (300) when the exhaust port is closed and the first inlet port is closed; and to detect the third liquid level value in the non-condensable gas collection tank (200) when the first inlet port is closed, the first drain port is closed, and the exhaust port is open. The controller is communicatively connected to the detection element (400), which transmits the first liquid level value, the second liquid level value, and the third liquid level value to the controller so that the controller can calculate the non-condensable gas content in the steam.

2. The online non-condensable gas detection device according to claim 1, characterized in that, The first drain port and the second inlet port are connected through a first pipeline (500), and the detection element (400) is a pressure sensor, which is installed on the first pipeline (500).

3. The online non-condensable gas detection device according to claim 2, characterized in that, The first pipeline (500) is provided with a first drain valve (510), which is used to control the connection or closure of the first pipeline (500).

4. The online non-condensable gas detection device according to claim 1, characterized in that, The non-condensable gas collection tank (200) is equipped with an exhaust valve (220), which is used to control the opening or closing of the exhaust port.

5. The online non-condensable gas detection device according to claim 1, characterized in that, It also includes a recycling tank, and the condensate collection tank (300) has a second drain outlet, which is connected to the recycling tank via a second pipeline (600).

6. The online non-condensable gas detection device according to claim 5, characterized in that, A second drain valve (610) is provided on the second pipeline (600), and the second drain valve (610) is used to control the connection or closure of the second pipeline (600).

7. The online non-condensable gas detection device according to claim 1, characterized in that, The outlet of the heat exchanger (100) and the first liquid inlet are connected through a third pipeline (110), and a temperature sensor (120) is provided on the third pipeline (110).

8. The online non-condensable gas detection device according to claim 1, characterized in that, It also includes an orifice plate (700) and an inlet pipe (800), the orifice plate (700) being connected to the inlet of the heat exchanger (100) via the inlet pipe (800), and the end of the orifice plate (700) facing away from the inlet pipe (800) being connected to the steam source.

9. The online non-condensable gas detection device according to claim 8, characterized in that, A control valve (810) is provided on the intake pipe (800), and the control valve (810) is used to control the opening or closing of the intake pipe (800).

10. The online non-condensable gas detection device according to claim 1, characterized in that, The condensate collection tank (300) has an opening that connects to the outside.

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