Steam quality on-line detection system

Abstract

The invention relates to a steam quality online detection system. The steam quality online detection system comprises a non-condensable gas content detection unit, a superheat degree detection unit, a dryness detection unit and a gas inlet pipe used for outputting steam to be detected, the non-condensable gas content detection unit comprises a first condenser and a non-condensable gas detector which are communicated with each other, and the first condenser is communicated with the gas inlet pipe and used for condensing the steam to be detected; the non-condensable gas detector is used for detecting the content of non-condensable gas in the input material conveyed by the first condenser; the superheat degree detection unit comprises a first branch channel communicated with the air inlet pipe, and the first branch channel is provided with a first temperature detector for detecting the superheated steam temperature value of the steam to be detected; the dryness detection unit comprises a gas-liquid mixer output end and a second condenser input end which are communicated with each other, a first input pipe which is communicated with the first branch channel and the gas-liquid mixer, and a circulating pipeline which is communicated with the output end of the second condenser and the input end of the gas-liquid mixer. Through the arrangement, the intelligent detection of the steam quality is realized.

Description

Technical Field

[0001] The present application relates to the technical field of steam production, and in particular to an online steam quality detection system. Background Art

[0002] In the pharmaceutical industry, steam is usually used for cleaning, thermal disinfection and sterilization of vessels. At the same time, the steam must not contain volatile additives to prevent contamination of drugs. In order to safely use steam in the above processes, it is necessary to test the quality of steam: superheat, dryness value and non-condensable gas content, and only use steam that meets the requirements of EN285.

[0003] At present, the measurement of steam quality indicators is often completed by manual periodic sampling and measurement. The measurement procedure is cumbersome and complicated, the measurement time is long, the labor cost is high, and it has certain risks and lags. Summary of the invention

[0004] Based on this, it is necessary to provide a steam quality online detection system to address the problem that the current steam quality detection is not intelligent enough.

[0005] A steam quality online detection system, comprising an air intake pipe, a non-condensable gas content detection unit, a superheat detection unit and a dryness detection unit, wherein:

[0006] The air inlet pipe is used to output the steam to be tested;

[0007] The non-condensable gas content detection unit includes a first condenser and a non-condensable gas detector connected to the first condenser, the first condenser is connected to the air inlet pipe, the first condenser is used to condense the steam to be tested and transport the formed condensate and non-condensable gas to the non-condensable gas detector, and the non-condensable gas detector is used to detect the content of the non-condensable gas in the input;

[0008] The superheat detection unit comprises a first branch channel connected to the air inlet pipe, the first branch channel is provided with a first temperature detector, and the first temperature detector is used to detect the superheated steam temperature value of the steam to be measured in the first branch channel;

[0009] The dryness detection unit includes a first input pipe, a gas-liquid mixer, a second condenser and a circulation pipeline. The first input pipe connects the first branch with the input end of the gas-liquid mixer. The gas-liquid mixer is provided with a first pressure detector and a second temperature detector, and the output end of the gas-liquid mixer is connected with the input end of the second condenser. The two ends of the circulation pipeline are respectively connected with the output end of the second condenser and the input end of the gas-liquid mixer.

[0010] In one embodiment, the second condenser is disposed on the top of the gas-liquid mixer, and the output end of the gas-liquid mixer is connected to the input end of the second condenser through a connecting pipe, and a circulating pump is provided on the connecting pipe.

[0011] In one of the embodiments, the dryness detection unit further includes a second input pipe, and two ends of the second input pipe are respectively connected to the output end of the first condenser and the input end of the second condenser.

[0012] In one embodiment, the non-condensable gas content detection unit further includes a first delivery pipe, one end of the first delivery pipe is connected to the output end of the non-condensable gas detector, and the other end of the first delivery pipe is connected to the second input pipe.

[0013] In one of the embodiments, the steam quality online detection system also includes a drain port, and the dryness detection unit also includes a dryness output pipe, the dryness output pipe is arranged at a set height value of the gas-liquid mixer, and the dryness output pipe connects the gas-liquid mixer and the drain port, and a dryness control valve is arranged on the dryness output pipe.

[0014] In one of the embodiments, the superheat detection unit also includes a second branch channel connected to the air intake pipe, a third temperature detector is arranged on the second branch channel, an end of the second branch channel away from the air intake pipe is connected to the drain port, a steam trap is arranged on the second branch channel, and the steam trap is located between the third temperature detector and the drain port.

[0015] In one of the embodiments, a first throttling orifice is disposed on the first branch channel, and the first temperature detector is disposed on the first throttling orifice.

[0016] In one embodiment, the non-condensable gas detector comprises a gas collection tank, a liquid delivery pipe, a gas delivery pipe and a condensate collection tank, wherein:

[0017] The input end of the gas collection tank is connected to the first condenser;

[0018] The liquid delivery pipe is connected to the bottom of the gas collection tank and the bottom of the condensate collection tank, and a second pressure detector and a delivery control valve are arranged on the liquid delivery pipe;

[0019] The gas delivery pipe is arranged at the upper end of the gas collecting tank, and a gas control valve is also arranged on the gas delivery pipe.

[0020] In one of the embodiments, the steam quality online detection system further includes an exhaust port, and one end of the gas delivery pipe facing away from the gas collection tank is connected to the exhaust port.

[0021] In one embodiment, the non-condensable gas detector also includes a first drain pipe, one end of which is connected to the liquid delivery pipe, the other end of which is connected to an end of the first delivery pipe away from the second input pipe, and a drain valve is provided on the first drain pipe.

[0022] The above-mentioned steam quality online detection system is connected to the first condenser by setting a non-condensable gas detector. The first condenser condenses the steam to be tested to form a condensate, and the non-condensable gas detector detects the non-condensable gas content that is insoluble in the condensate; the first branch is connected to the air inlet pipe by setting a first temperature detector to detect the superheated steam temperature value of the steam to be tested, and the superheat value is obtained by the difference between the superheated steam temperature value and the evaporation temperature; the gas-liquid mixer is provided with a first pressure detector and a second temperature detector, and the first pressure detector and the second temperature detector are used to detect the change of the liquid level and temperature value before and after the temperature rise in the gas-liquid mixer, so as to obtain the dryness of the steam to be tested. Through the above-mentioned settings, the detection of the non-condensable gas content, superheat, and dryness value of the entire steam to be tested is automatically completed by the equipment, realizing intelligent detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the flow of steam and condensate to be tested in the online steam quality detection system provided in this application.

[0024] in:

[0025] 10. Steam quality online detection system;

[0026] 100, air intake pipe; 110, air intake port; 120, air intake throttle orifice plate; 130, air intake pressure detector;

[0027] 200, non-condensable gas content detection unit; 210, first condenser; 220, non-condensable gas detector; 221, gas collection tank; 222, liquid delivery pipe; 2221, second pressure detector; 2222, delivery control valve; 223, gas delivery pipe; 2231, gas control valve; 224, condensate collection tank; 225, second pipeline; 2251, second control valve; 230, first pipeline; 231, condensation control valve; 240, first delivery pipe; 250, fourth temperature sensor; 260, first drain pipe; 261, drain valve; 270, third pipeline; 280, regulating valve;

[0028] 300, superheat detection unit; 310, first branch; 311, first temperature detector; 312, first throttling orifice; 320, second branch; 321, third temperature detector; 322, steam trap;

[0029] 400, dryness detection unit; 410, first input pipe; 411, first control valve; 420, gas-liquid mixer; 421, first pressure detector; 422, second temperature detector; 430, second condenser; 440, circulation pipeline; 450, connecting pipeline; 451, circulation pump; 460, second input pipe; 461, third control valve; 470, dryness output pipe; 471, dryness control valve;

[0030] 500, liquid discharge port; 600, exhaust port. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height value than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height value than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0037] See also Figure 1 , Figure 1 A schematic diagram of a steam quality online detection system 10 in an embodiment of the present application is shown. The steam quality online detection system 10 provided in an embodiment of the present application includes an air intake pipe 100, a non-condensable gas content detection unit 200, a superheat detection unit 300 and a dryness detection unit 400, wherein the air intake pipe 100 is used to output the steam to be tested. In a specific setting, the air intake pipe 100 is connected to the air intake port 110, and the air intake port 110 is used to pass the steam to be tested into the air intake pipe 100. The air intake throttling orifice plate 120 and the air intake pressure detector 130 are provided on the air intake pipe 100 to control the flow rate of the steam to be tested.

[0038] The non-condensable gas content detection unit 200 includes a first condenser 210 and a non-condensable gas detector 220 connected to the first condenser 210. The first condenser 210 is connected to the air inlet pipe 100 through a first pipe 230. In a specific setting, the first pipe 230 is located on the side of the air inlet pressure detector 130 away from the air inlet 110. A condensation control valve 231 is also provided on the first pipe 230. The opening and closing of the condensation control valve 231 corresponds to the passage or blockage of the steam to be tested. The first condenser 210 is used to condense the steam to be tested and transport the formed condensate and non-condensable gas to the non-condensable gas detector 220. In a specific setting, the first condenser 210 is preferably an air-cooled condenser. Compared with the water condensation method, it avoids the condensation inconvenience caused by the lack of cooling water at the detection site, and also avoids the external connection of public engineering media, which is more convenient to operate. The non-condensable gas detector 220 is used to detect the content of non-condensable gas in the input.

[0039] The superheat detection unit 300 includes a first branch channel 310 connected to the intake pipe 100. In a specific setting, the first branch channel 310 is connected to the end of the intake pipe 100. A first temperature detector 311 is provided on the first branch channel 310. The first temperature detector 311 is used to detect the superheated steam temperature value of the steam to be tested in the first branch channel 310. It should be noted that the difference between the superheated steam temperature value and the evaporation temperature under the local atmospheric pressure (that is, 100 degrees Celsius) is the superheat value.

[0040] The dryness detection unit 400 includes a first input pipe 410, a gas-liquid mixer 420, a second condenser 430 and a circulation pipeline 440. The first input pipe 410 connects the first branch channel 310 with the input end of the gas-liquid mixer 420. In the specific setting, the first input pipe 410 is connected to the end of the first branch channel 310, which is convenient for directly performing dryness detection on the steam after superheat detection, which is conducive to simplifying the component layout of the entire detection system. The first input pipe 410 is provided with a first control valve 411 for controlling the steam to enter the gas-liquid mixer 420 or blocking the steam from entering the gas-liquid mixer 420. Through the above setting, the steam to be tested flows from the first branch channel 310 through the first input pipe 410 into the gas-liquid mixer 420.

[0041] The gas-liquid mixer 420 is provided with a first pressure detector 421 and a second temperature detector 422, and the output end of the gas-liquid mixer 420 is connected to the input end of the second condenser 430, and the two ends of the circulation pipe 440 are respectively connected to the output end of the second condenser 430 and the input end of the gas-liquid mixer 420. Through the above-mentioned setting, the second condenser 430 condenses the steam to be tested input into the gas-liquid mixer 420 and then inputs it into the gas-liquid mixer 420 through the circulation pipe 440. When the pressure of the gas-liquid mixer 420 reaches the set value, an eccentric motor is used to shake the steam and condensate to reduce the heat loss caused by external interference. In the specific setting, the second condenser 430 includes a fan, and the air volume of the fan is adjusted to achieve rapid cooling. The second condenser 430 is a mature technical means and will not be introduced in detail here.

[0042] It should be emphasized that the steam quality online detection system 10 also includes a controller, and the controller is in communication with the gas-liquid mixer 420, various condensers, various temperature detectors, various pressure detectors and various valves in the present application. During the specific dryness detection, step S1, when the pressure in the gas-liquid mixer 420 is observed to reach the pressure setting value through the first pressure detector 421, the first control valve 411 is closed. It should be noted that the pressure setting value is determined according to the type of the gas-liquid mixer 420, and it can ensure that the gas-liquid mixer 420 starts quickly; step S2, the second condenser 430 and the gas-liquid mixer 420 circulate until the temperature drops to the set temperature and then stops; step S3, at this time, the first pressure detector 421 and the second temperature detector 422 perform detection to obtain the first liquid level height value and the first temperature value; step S4 , then open the first control valve 411, the liquid level and temperature of the gas-liquid mixer 420 will gradually rise, and when the temperature reaches the preset temperature, close the first control valve 411; step S5, then open the gas-liquid mixer 420 for shaking, and stop shaking after the temperature in the opened gas-liquid mixer 420 stabilizes; step S6, at this time, the first pressure detector 421 and the second temperature detector 422 perform detection to obtain the second liquid level height value and the second temperature value; the first temperature value, the second temperature value, the first liquid level height value and the second liquid level height value are transmitted to the data processor through signals for calculation to obtain the dryness D of the steam to be measured.

[0043] It should be noted that the first liquid level height value is the height value of the initial injection liquid in the gas-liquid mixer 420, and the second liquid level height value is the height value of the final injection liquid in the gas-liquid mixer 420. The volume of the initial injection liquid can be obtained by multiplying the first liquid level height value and the cross-sectional area of ​​the columnar gas-liquid mixer 420. The first mass can be obtained by multiplying the volume of the initial injection liquid and its own density. Similarly, the second mass of the final injection liquid can be obtained. The dryness D of the steam to be measured can be obtained according to the first mass, the second mass, the first temperature value and the second temperature value. The dryness D of the steam to be measured = (T2-T1)(CPW *M1+C PW *A) / (L*M2)-(T3-T2)*C PW / L, wherein: T2 is the final temperature in the gas-liquid mixer 420, i.e., the second temperature value; T1 is the initial temperature in the gas-liquid mixer 420, i.e., the first temperature value; C PW is the specific heat capacity of the injection liquid, which can be obtained by querying according to the specific type of liquid formed by cooling; M1 is the mass of the initial injection liquid, that is, the first mass of this application; A is the effective specific heat capacity of the device, which is 0.24KJ / (kg.℃); M2 is the difference between the mass of the final injection liquid and the mass of the initial injection liquid, that is, the difference between the second mass and the first mass of this application; T3 is the temperature of the saturated steam, which can be specifically obtained through the measurement value of the first temperature detector 311; L is the heat of vaporization of saturated steam at temperature T3, which can be specifically queried through the heat of vaporization list.

[0044] The above-mentioned steam quality online detection system 10 is connected to the first condenser 210 by setting a non-condensable gas detector 220. The first condenser 210 condenses the steam to be tested to form a condensate, and the non-condensable gas detector 220 detects the non-condensable gas content that is insoluble in the condensate; the first branch 310 is connected to the air inlet pipe 100, and the first temperature detector 311 detects the superheated steam temperature value of the steam to be tested, and the superheat value is obtained by the difference between the superheated steam temperature value and the evaporation temperature; the gas-liquid mixer 420 is provided with a first pressure detector 421 and a second temperature detector 422, and the first pressure detector 421 and the second temperature detector 422 are used to detect the dryness of the steam to be tested according to the changes in the liquid level and temperature value before and after the temperature rise in the gas-liquid mixer 420. Through the above-mentioned settings, the detection of the non-condensable gas content, superheat, and dryness value of the entire steam to be tested is automatically completed by the equipment, realizing intelligent detection.

[0045] In order to enable the condensate of the second condenser 430 to quickly flow into the gas-liquid mixer 420, a preferred embodiment is that the second condenser 430 is arranged at the top of the gas-liquid mixer 420, and the output end of the bottom of the second condenser 430 is connected to the input end of the top of the gas-liquid mixer 420 through a circulation pipe 440. In order to facilitate the transmission from the gas-liquid mixer 420 to the second condenser 430, the output end of the gas-liquid mixer 420 is connected to the input end of the second condenser 430 through a connecting pipe 450, and a circulation pump 451 connected to the controller is also arranged on the connecting pipe 450. Through the above arrangement, in step S1, specifically, the steam to be tested enters the gas-liquid mixer 420 through the first control valve 411, then enters the second condenser 430 through the connecting pipe 450 and the circulating pump 451, and after condensation in the second condenser 430, enters the gas-liquid mixer 420 through the circulating pipe 440 to realize the cooling and liquefaction process, until the pressure in the gas-liquid mixer 420 reaches the pressure setting value and the first control valve 411 is closed.

[0046] In order to quickly make the pressure in the gas-liquid mixer 420 reach the pressure setting value, in a preferred embodiment, the dryness detection unit 400 also includes a second input pipe 460, and the two ends of the second input pipe 460 are respectively connected to the output end of the first condenser 210 and the input end of the second condenser 430. Specifically, the non-condensable gas content detection unit 200 also includes a first delivery pipe 240, one end of the first delivery pipe 240 is connected to the output end of the non-condensable gas detector 220, and the other end of the first delivery pipe 240 is connected to the second input pipe 460. Through the above arrangement, the second condenser 430 is also used to receive the condensate diverted from the first condenser 210 and the condensate after the non-condensable gas detector 220 has detected it, avoiding manual injection to reach the required pressure value and reducing the energy consumption of the equipment.

[0047] In order to facilitate the continuous measurement of dryness, specifically, the steam quality online detection system 10 also includes a drain port 500, and the dryness detection unit 400 also includes a dryness output pipe 470, which is arranged at a set height value of the gas-liquid mixer 420, and the dryness output pipe 470 connects the gas-liquid mixer 420 with the drain port 500, and a dryness control valve 471 is arranged on the dryness output pipe 470. Through the above settings, after running step S1, the pressure in the gas-liquid mixer 420 reaches the pressure setting value, and the first control valve 411 is closed; then through step S2, the second condenser 430 and the gas-liquid mixer 420 are circulated to reduce the temperature to the set temperature. At this time, the dryness output pipe 470 is configured to be flush with the liquid level of the gas-liquid mixer 420, and the dryness control valve 471 is in a closed state; after the first liquid level height value and the first temperature value are obtained through step S3; then through step S4, the first control valve 411 is opened to obtain the second temperature value and the second liquid level height value of the gas-liquid mixer 420 after heating, so as to facilitate the subsequent calculation of dryness. After completing this calculation, the dryness control valve 471 is opened to allow the liquid above the dryness output pipe 470 to flow out and then the dryness control valve 471 is closed, and then the temperature is reduced through step S2, and the cycle is performed. Therefore, after the steam quality online detection system 10 of the present application detects the dryness for the first time, the dryness control valve 471 only needs to be opened to discharge the liquid for the next detection, and there is no need to add liquid again. The dryness can then be detected again by circulating the temperature.

[0048] In order to ensure the accuracy of the superheat and dryness detection results, more specifically, the superheat detection unit 300 further includes a second branch channel 320 connected to the intake pipe 100, a third temperature detector 321 is arranged on the second branch channel 320, one end of the second branch channel 320 away from the intake pipe 100 is connected to the drain port 500, a steam trap 322 is arranged on the second branch channel 320, and the steam trap 322 is located between the third temperature detector 321 and the drain port 500. Through the above arrangement, a part of the steam to be tested in the intake pipe 100 enters the first branch channel 310 for superheat detection, and the other part enters the second branch channel 320 to obtain a third temperature value through detection by the third temperature detector 321. The third temperature value is used for comparison with the second temperature value. When the difference between the two is not large, the accuracy of the temperature detection is verified, and the third temperature value can be used as the value of T3. At the same time, a steam trap 322 is provided on the second branch channel 320, and the steam trap 322 is used to discharge the liquid condensed during the steam transportation process to be tested, thereby increasing the accuracy of superheat and dryness detection.

[0049] In order to accurately measure the superheated steam temperature value of the steam to be measured, in a preferred embodiment, a first throttling orifice 312 is provided on the first branch channel 310, and a first temperature detector 311 is provided on the first throttling orifice 312. The first throttling orifice 312 is used for pressure relief, and the first temperature detector 311 is used for detecting the first temperature value after pressure relief, i.e., the superheated steam temperature value. The difference between the superheated steam temperature value and the evaporation temperature (i.e., 100 degrees Celsius) under the local atmospheric pressure is the superheat value.

[0050] In order to more conveniently realize the non-condensable gas detector 220 to detect the content of non-condensable gas, specifically, the non-condensable gas detector 220 includes a gas collection tank 221, a liquid delivery pipe 222, a gas delivery pipe 223 and a condensate collection tank 224. The input end of the gas collection tank 221 is connected with the first condenser 210. In the specific setting, the gas collection tank 221 is arranged above the first condenser 210, and the output end of the first condenser 210 is connected with the gas collection tank 221 through the second pipeline 225; the liquid delivery pipe 222 connects the bottom of the gas collection tank 221 with the bottom of the condensate collection tank 224, and the second pressure detector 2221 and the delivery control valve 2222 are arranged on the liquid delivery pipe 222; the gas delivery pipe 223 is arranged at the upper end of the gas collection tank 221, and the gas delivery pipe 223 is also provided with a gas control valve 2231.

[0051] During the specific operation, the delivery control valve 2222 and the gas control valve 2231 are opened, and the condensate and non-condensable gas formed by the first condenser 210 are input into the gas collecting tank 221 and then flow into the condensate collecting tank 224. At this time, the liquid levels of the gas collecting tank 221 and the condensate collecting tank 224 are the same, which is similar to the principle of a communicating vessel; the second pressure detector 2221 is used to detect the liquid level value and feed it back to the controller. When the detected liquid level value reaches the preset liquid level value, the gas control valve 2231 is closed; thereafter, the non-condensable gas input by the first condenser 210 remains in the gas collecting tank 221 and all the condensate is pressed into the condensate collecting tank 224; the steam to be tested is stopped from entering the gas collecting tank 221, and the liquid level of the condensate collecting tank 224 is detected to be the first liquid level value; the delivery control valve 2222 is closed, the gas control valve 2231 is opened, and the second liquid level value in the condensate collecting tank 224 is detected; the difference between the second liquid level value and the first liquid level value is the output of the non-condensable gas.

[0052] In order to ensure that the steam to be tested input into the gas collection tank 221 through the first condenser 210 is at a predetermined temperature, the second pipeline 225 and the second input pipe 460 are respectively provided with a second control valve 2251 and a third control valve 461, and a fourth temperature sensor 250 is provided at the junction of the second pipeline 225 and the second input pipe 460. When the temperature value detected by the fourth temperature sensor 250 is higher than the preset temperature, the fan air volume of the first condenser 210 is adjusted to achieve cooling. When the detected temperature of the fourth temperature sensor 250 is the predetermined temperature, the second control valve 2251 and the third control valve 461 are opened.

[0053] In order to facilitate the discharge of non-condensable gas in the gas collection tank 221, more specifically, the steam quality online detection system 10 further includes an exhaust port 600, and one end of the gas delivery pipe 223 away from the gas collection tank 221 is connected to the exhaust port 600. In a specific configuration, the exhaust port 600 is located at the top of the steam quality online detection system 10 to facilitate the upward discharge of gas.

[0054] In order to facilitate the injection of the condensate in the non-condensable gas content detection unit 200 into the second condenser 430, more specifically, the non-condensable gas detector 220 also includes a first drain pipe 260, one end of the first drain pipe 260 is connected to the liquid delivery pipe 222, the other end of the first drain pipe 260 is connected to the end of the first delivery pipe 240 away from the second input pipe 460, and a drain valve 261 is provided on the first drain pipe 260. In the specific setting, the other end of the first drain pipe 260 is also connected to the third pipeline 270, the end of the third pipeline 270 away from the first drain pipe 260 is connected to the dryness output pipe 470 and the exhaust port 600, and the third pipeline 270 and the first delivery pipe 240 are both connected to the first drain pipe 260 through the regulating valve 280. For the convenience of draining, the drain port 500 is located at the bottom of the steam quality online detection system 10. Through the above setting, the steam quality online detection system 10 can drain the liquid through the drain port 500 when it is shut down.

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0056] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A steam quality online detection system, characterized in that: The steam quality online detection system includes an air intake pipe, a non-condensable gas content detection unit, a superheat detection unit and a dryness detection unit, wherein: The air inlet pipe is used to output the steam to be tested; The non-condensable gas content detection unit includes a first condenser and a non-condensable gas detector connected to the first condenser, the first condenser is connected to the air inlet pipe, the first condenser is used to condense the steam to be tested and transport the formed condensate and non-condensable gas to the non-condensable gas detector, and the non-condensable gas detector is used to detect the content of the non-condensable gas in the input; The superheat detection unit comprises a first branch channel connected to the air inlet pipe, the first branch channel is provided with a first temperature detector, and the first temperature detector is used to detect the superheated steam temperature value of the steam to be measured in the first branch channel; The dryness detection unit includes a first input pipe, a gas-liquid mixer, a second condenser and a circulation pipeline. The first input pipe connects the first branch with the input end of the gas-liquid mixer. The gas-liquid mixer is provided with a first pressure detector and a second temperature detector, and the output end of the gas-liquid mixer is connected with the input end of the second condenser. The two ends of the circulation pipeline are respectively connected with the output end of the second condenser and the input end of the gas-liquid mixer.

2. The steam quality online detection system according to claim 1, characterized in that: The second condenser is arranged on the top of the gas-liquid mixer, and the output end of the gas-liquid mixer is connected with the input end of the second condenser through a connecting pipe, and a circulating pump is arranged on the connecting pipe.

3. The steam quality online detection system according to claim 1, characterized in that: The dryness detection unit further includes a second input pipe, and two ends of the second input pipe are respectively connected to the output end of the first condenser and the input end of the second condenser.

4. The steam quality online detection system according to claim 3 is characterized in that: The non-condensable gas content detection unit further includes a first delivery pipe, one end of which is connected to the output end of the non-condensable gas detector, and the other end of which is connected to the second input pipe.

5. The steam quality online detection system according to claim 2, characterized in that: The steam quality online detection system also includes a drain port, and the dryness detection unit also includes a dryness output pipe, which is arranged at a set height value of the gas-liquid mixer, and the dryness output pipe connects the gas-liquid mixer and the drain port, and a dryness control valve is arranged on the dryness output pipe.

6. The steam quality online detection system according to claim 5, characterized in that: The superheat detection unit also includes a second branch channel connected to the air intake pipe, a third temperature detector is arranged on the second branch channel, an end of the second branch channel away from the air intake pipe is connected to the drain port, a steam trap is arranged on the second branch channel, and the steam trap is located between the third temperature detector and the drain port.

7. The steam quality online detection system according to claim 1, characterized in that: The first branch channel is provided with a first throttling orifice plate, and the first temperature detector is provided on the first throttling orifice plate.

8. The steam quality online detection system according to claim 4, characterized in that: The non-condensable gas detector comprises a gas collection tank, a liquid delivery pipe, a gas delivery pipe and a condensate collection tank, wherein: The input end of the gas collection tank is connected to the first condenser; The liquid delivery pipe is connected to the bottom of the gas collection tank and the bottom of the condensate collection tank, and a second pressure detector and a delivery control valve are arranged on the liquid delivery pipe; The gas delivery pipe is arranged at the upper end of the gas collecting tank, and a gas control valve is also arranged on the gas delivery pipe.

9. The steam quality online detection system according to claim 8, characterized in that: The steam quality online detection system also includes an exhaust port, and one end of the gas delivery pipe facing away from the gas collection tank is connected to the exhaust port.

10. The steam quality online detection system according to claim 8, characterized in that: The non-condensable gas detector also includes a first drain pipe, one end of which is connected to the liquid delivery pipe, the other end of which is connected to an end of the first delivery pipe away from the second input pipe, and a drain valve is provided on the first drain pipe.

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