Steam quality on-line detection system

Abstract

The utility model 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, in particular to a steam quality online detection system. BACKGROUND

[0002] In the pharmaceutical industry, steam is usually used for cleaning, heat sterilization and sterilization process of the vessel, and the steam does not contain volatile additives to prevent contamination of the drug. In order to use the steam in the above process with confidence, the quality of the steam: superheat degree, dryness value and non-condensable gas content need to be detected, and the steam meeting the requirements of EN285 is used.

[0003] At present, the measurement of steam quality indicators is usually completed by artificial periodic sampling measurement, and the measurement procedure is relatively complicated and complex, the measurement time is long, the labor cost is high, and there is a certain danger and hysteresis. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a steam quality online detection system in view of the problem that the steam quality detection is not intelligent enough.

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

[0006] The air inlet pipe is used for outputting the steam to be measured;

[0007] The non-condensable gas content detection unit comprises a first condenser and a non-condensable gas detector connected with the first condenser, the first condenser is connected with the air inlet pipe, the first condenser is used for condensing the steam to be measured and conveying the formed condensate and non-condensable gas to the non-condensable gas detector, and the non-condensable gas detector is used for detecting the content of the non-condensable gas in the input;

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

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

[0010] In one of the embodiments, the second condenser is arranged at the top of the gas-liquid mixer, and an output end of the gas-liquid mixer is connected to an input end of the second condenser through a connecting pipeline, and a circulating pump is arranged on the connecting pipeline.

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

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

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

[0014] In one of the embodiments, the superheat detection unit further comprises a second branch pipe connected to the gas inlet pipe, a third temperature detector is arranged on the second branch pipe, one end of the second branch pipe away from the gas inlet pipe is connected to the liquid discharge port, a drain valve is arranged on the second branch pipe, and the drain valve is located between the third temperature detector and the liquid discharge port.

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

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

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

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

[0019] The gas conveying pipe is arranged at an upper end of the gas collection tank, and a gas control valve is further arranged on the gas conveying pipe.

[0020] In one of the embodiments, the steam quality online detection system further comprises an air discharge port, and one end of the gas conveying pipe away from the gas collection tank is connected to the air discharge port.

[0021] In one of the embodiments, the non-condensable gas detector further comprises a first liquid discharge pipe, one end of the first liquid discharge pipe being in communication with the liquid delivery pipe, the other end of the first liquid discharge pipe being in communication with the one end of the first delivery pipe away from the second input pipe, and a liquid discharge valve being arranged on the first liquid discharge pipe.

[0022] The above-mentioned online steam quality detection system, by arranging the non-condensable gas detector in communication with the first condenser, the first condenser condensing the to-be-detected steam to form condensate, and the non-condensable gas detector detecting the content of non-condensable gas which is insoluble in the condensate; by arranging the first branch in communication with the gas inlet pipe, the first temperature detector detecting the superheated steam temperature value of the to-be-detected steam, and the superheat value being obtained by the difference between the superheated steam temperature value and the evaporation temperature; by arranging the gas-liquid mixer being provided with the first pressure detector and the second temperature detector, the first pressure detector and the second temperature detector being used to detect the dryness of the to-be-detected steam according to the changes of the liquid level and the temperature value before and after the temperature rise in the gas-liquid mixer. Through the above arrangement, the detection of the content of non-condensable gas, the superheat value, and the dryness value of the whole to-be-detected steam is automatically completed by the equipment, and intelligent detection is realized. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The flow diagram of the to-be-detected steam and the condensate in the online steam quality detection system provided in the present application.

[0024] Wherein:

[0025] 10. An online steam quality detection system;

[0026] 100. A gas inlet pipe; 110. A gas inlet; 120. A gas inlet orifice plate; 130. A gas inlet pressure detector;

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

[0028] 300. A superheat value detection unit; 310. A first branch; 311. A first temperature detector; 312. A first orifice plate; 320. A second branch; 321. A third temperature detector; 322. A 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 pipe; 450, connection pipe; 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, gas discharge port. DETAILED DESCRIPTION

[0031] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without using some or all of these specific details, and that the present application is not limited to the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0034] In the present application, unless specifically defined otherwise, if there is an appearance of the terms "installation", "connection", "connection", "fixation" and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless specifically defined otherwise, if there is a description of the first feature "on" or "under" the second feature and the like, it means that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or only indicates that the horizontal height value of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicates that the horizontal height value of the first feature is less than that of the second feature.

[0036] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and do not represent the only embodiment.

[0037] Please refer to 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 by an embodiment of the present application includes an inlet pipe 100, a non-condensable gas content detection unit 200, a superheat degree detection unit 300 and a dryness detection unit 400, wherein the inlet pipe 100 is used to output the steam to be detected. In a specific arrangement, the inlet pipe 100 is in communication with an inlet port 110, the inlet port 110 is used to introduce the steam to be detected into the inlet pipe 100, and the inlet pipe 100 is provided with an inlet throttle orifice plate 120 and an inlet pressure detector 130 for controlling the flow of the steam to be detected.

[0038] The non-condensable gas content detection unit 200 comprises a first condenser 210 and a non-condensable gas detector 220 connected with the first condenser 210. The first condenser 210 is connected with the air inlet pipe 100 through a first pipe 230. In a specific arrangement, 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 further arranged on the first pipe 230. The opening and closing of the condensation control valve 231 corresponds to the passing or blocking of the steam to be detected. The first condenser 210 is used to condense the steam to be detected and deliver the formed condensate and non-condensable gas to the non-condensable gas detector 220. In a specific arrangement, the first condenser 210 is preferably a wind-cooled condenser. Compared with the water-cooled condensation mode, the wind-cooled condenser avoids the inconvenience of condensation caused by the absence of cooling water at the detection site and avoids external utility medium, thus being 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 degree detection unit 300 comprises a first branch 310 connected with the air inlet pipe 100. In a specific arrangement, the first branch 310 is connected with the end of the air inlet pipe 100. A first temperature detector 311 is arranged on the first branch 310. The first temperature detector 311 is used to detect the superheated steam temperature value of the steam to be detected in the first branch 310. It should be noted that 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 degree value.

[0040] The dryness detection unit 400 comprises a first input pipe 410, a gas-liquid mixer 420, a second condenser 430 and a circulation pipe 440. The first input pipe 410 connects the first branch 310 with the input end of the gas-liquid mixer 420. In a specific arrangement, the first input pipe 410 is connected with the end of the first branch 310, so that the steam after the superheat degree detection can be directly subjected to dryness detection, which is conducive to simplifying the component layout of the entire detection system. A first control valve 411 is arranged on the first input pipe 410, which is used to control the passing or blocking of the steam into the gas-liquid mixer 420. Through the above arrangement, the steam to be detected flows into the gas-liquid mixer 420 from the first branch 310 through the first input pipe 410.

[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 in communication with the input end of the second condenser 430, and the two ends of the circulation pipeline 440 are connected in communication with the output end of the second condenser 430 and the input end of the gas-liquid mixer 420 respectively. Through the above arrangement, the second condenser 430 condenses the steam to be measured input by the gas-liquid mixer 420 and then inputs the steam to the gas-liquid mixer 420 through the circulation pipeline 440, and the gas-liquid mixer 420 uses an eccentric motor to shake the steam and the condensate when the pressure reaches the set value, thereby reducing the heat loss caused by external interference. In a specific arrangement, the second condenser 430 includes a fan, and the fan flow is adjusted to achieve rapid cooling. The second condenser 430 is a mature technology and will not be described in detail here.

[0042] It should be emphasized that the steam quality online detection system 10 further includes a controller, which is in communication connection with the gas-liquid mixer 420, various condensers, various temperature detectors, various pressure detectors, and various valves in the present application. In a specific dryness detection, step S1, when the pressure in the gas-liquid mixer 420 reaches the pressure set value observed by the first pressure detector 421, the first control valve 411 is closed. It should be noted that the pressure set value is determined according to the type of the gas-liquid mixer 420, which can ensure that the gas-liquid mixer 420 starts quickly; step S2, the second condenser 430 and the gas-liquid mixer 420 are operated in circulation 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 detect to obtain the first liquid level height value and the first temperature value; step S4, then the first control valve 411 is opened, and the liquid level and temperature of the gas-liquid mixer 420 will gradually rise, and when the temperature reaches the preset temperature, the first control valve 411 is closed; step S5, then the gas-liquid mixer 420 is opened for shaking, and the shaking is stopped 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 detect 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 for operation 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 by the cross-sectional area of the cylindrical gas-liquid mixer 420, and the first mass can be obtained by multiplying the volume of the initial injection liquid by its density. Similarly, the second mass of the final injection liquid 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 can be obtained.PW 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 injected liquid, which can be obtained by consulting the list according to the type of liquid formed by the specific cooling; M1 is the mass of the initial injected liquid, i.e. the first mass of the present application; A is the effective specific heat capacity of the device, which is 0.24 KJ / (kg.℃); M2 is the difference between the mass of the final injected liquid and the mass of the initial injected liquid, i.e. the difference between the second mass and the first mass of the present application; T3 is the temperature of the saturated steam, which can be obtained by the measurement value of the first temperature detector 311; L is the heat of vaporization of the saturated steam at the temperature T3, which can be obtained by consulting the list of heat of vaporization.

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

[0045] In order to make the condensed liquid of the second condenser 430 flow into the gas-liquid mixer 420 quickly, in a preferred embodiment, the second condenser 430 is arranged at the top of the gas-liquid mixer 420, and the output end at the bottom of the second condenser 430 is connected to the input end at the top of the gas-liquid mixer 420 through a circulation pipeline 440. In order to facilitate the transmission of 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 pipeline 450, and a circulating pump 451 connected with the controller is arranged on the connecting pipeline 450. Through the above arrangement, in step S1, the steam to be measured enters the gas-liquid mixer 420 through the first control valve 411, then enters the second condenser 430 through the connecting pipeline 450 and the circulating pump 451, and after being condensed by the second condenser 430, enters the gas-liquid mixer 420 through the circulation pipeline 440, so as to realize the cooling and liquefaction process, and when the pressure in the gas-liquid mixer 420 reaches the pressure setting value, the first control valve 411 is closed.

[0046] In order to make the pressure in the gas-liquid mixer 420 reach the pressure setting value quickly, in a preferred embodiment, the dryness detection unit 400 further comprises 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 further comprises a first conveying pipe 240, one end of the first conveying pipe 240 is connected to the output end of the non-condensable gas detector 220, and the other end of the first conveying pipe 240 is connected to the second input pipe 460. Through the above arrangement, the second condenser 430 is also used to receive the condensed liquid diverted from the first condenser 210 and the condensed liquid after being detected by the non-condensable gas detector 220, so as to avoid manual liquid injection to reach the required pressure value, and also reduce the energy consumption of the equipment.

[0047] In order to facilitate continuous measurement of the dryness, specifically, the steam quality online detection system 10 further comprises a liquid outlet 500, and the dryness detection unit 400 further comprises a dryness output pipe 470, which is arranged at a set height value of the gas-liquid mixer 420 and is in communication with the gas-liquid mixer 420 and the liquid outlet 500, and a dryness control valve 471 is arranged on the dryness output pipe 470. Through the above arrangement, after the running step S1, the pressure in the gas-liquid mixer 420 reaches the pressure set value, and the first control valve 411 is closed; then the temperature is lowered to the set temperature through the circulation operation of the second condenser 430 and the gas-liquid mixer 420 in step S2, at this time, the dryness output pipe 470 is arranged to be flush with the liquid level of the gas-liquid mixer 420, and the dryness control valve 471 is in the closed state; after obtaining the first liquid level height value and the first temperature value through step S3; then the first control valve 411 is opened through step S4 to obtain the second temperature value and the second liquid level height value of the gas-liquid mixer 420 after the temperature rise, which facilitates subsequent calculation of the dryness. After completing this calculation, the dryness control valve 471 is opened, the liquid above the dryness output pipe 470 is discharged, and then the dryness control valve 471 is closed, and then the temperature is lowered through step S2, and the cycle is repeated. Therefore, the steam quality online detection system 10 of the present application only needs to open the dryness control valve 471 to discharge the liquid after detecting the dryness for the first time, without the need to supplement the liquid again, and then the dryness can be continuously detected by circulating the temperature lowering.

[0048] In order to ensure the accuracy of the superheat and dryness detection results, more specifically, the superheat detection unit 300 further comprises a second branch 320 in communication with the gas inlet pipe 100, a third temperature detector 321 is arranged on the second branch 320, one end of the second branch 320 away from the gas inlet pipe 100 is in communication with the liquid outlet 500, a drain valve 322 is arranged on the second branch 320, and the drain valve 322 is located between the third temperature detector 321 and the liquid outlet 500. Through the above arrangement, part of the to-be-detected steam in the gas inlet pipe 100 enters the first branch 310 for superheat detection, and the other part enters the second branch 320 to obtain a third temperature value through the third temperature detector 321, which is used for comparison with the second temperature value, and when the difference between the two is small, 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, the drain valve 322 is arranged on the second branch 320, which is used to discharge the condensed liquid in the to-be-detected steam conveying process, thereby increasing the accuracy of the superheat and dryness detection.

[0049] In order to accurately measure the superheated steam temperature value of the to-be-measured steam, in a preferred embodiment, the first branch passage 310 is provided with a first orifice plate 312, and the first temperature detector 311 is arranged on the first orifice plate 312. The first orifice plate 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 detection of the content of the non-condensable gas by the non-condensable gas detector 220, 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 in communication with the first condenser 210. In a specific arrangement, the gas collection tank 221 is arranged above the first condenser 210, and the output end of the first condenser 210 is in communication with the gas collection tank 221 through a second pipe 225. The liquid delivery pipe 222 is in communication with the bottom of the gas collection tank 221 and the bottom of the condensate collection tank 224, and the liquid delivery pipe 222 is provided with a second pressure detector 2221 and a delivery control valve 2222. The gas delivery pipe 223 is arranged at the upper end of the gas collection tank 221, and the gas delivery pipe 223 is further provided with a gas control valve 2231.

[0051] In specific operation, the delivery control valve 2222 and the gas control valve 2231 are opened, the condensate formed by the first condenser 210 and the non-condensable gas input into the gas collection tank 221 flow into the condensate collection tank 224, at this time, the liquid levels of the gas collection tank 221 and the condensate collection tank 224 are the same, similar to the principle of a communicating vessel. The second pressure detector 2221 is used for detecting the liquid level value and feeding 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 collection tank 221 and completely pressurizes the condensate into the condensate collection tank 224. The to-be-measured steam is stopped from being input into the gas collection tank 221, and the liquid level of the condensate collection tank 224 is detected as a first liquid level value. The delivery control valve 2222 is closed, and the gas control valve 2231 is opened, and the second liquid level value in the condensate collection tank 224 is detected. The difference between the second liquid level value and the first liquid level value is the yield of the non-condensable gas.

[0052] In order to ensure that the steam to be measured input into the gas collection tank 221 through the first condenser 210 is at a predetermined temperature, the second pipe 225 and the second input pipe 460 are respectively provided with a second control valve 2251 and a third control valve 461, and the intersection of the second pipe 225 and the second input pipe 460 is provided with a fourth temperature sensor 250. When the temperature value detected by the fourth temperature sensor 250 is higher than the preset temperature, the fan flow rate 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 on-line detection system 10 further comprises an exhaust port 600, and the end of the gas delivery pipe 223 away from the gas collection tank 221 is in communication with the exhaust port 600. In a specific arrangement, the exhaust port 600 is located at the top of the steam quality on-line detection system 10, facilitating the upward discharge of gas.

[0054] In order to facilitate the injection of condensate in the non-condensable gas content detection unit 200 into the second condenser 430, more specifically, the non-condensable gas detector 220 further comprises a first liquid discharge pipe 260, one end of the first liquid discharge pipe 260 is in communication with the liquid delivery pipe 222, the other end of the first liquid discharge pipe 260 is in communication with the end of the first delivery pipe 240 away from the second input pipe 460, and a liquid discharge valve 261 is arranged on the first liquid discharge pipe 260. In a specific arrangement, the other end of the first liquid discharge pipe 260 is also in communication with a third pipe 270, the end of the third pipe 270 away from the first liquid discharge pipe 260 is in communication with the dryness output pipe 470 and the exhaust port 600, and the third pipe 270 and the first delivery pipe 240 are both in communication with the first liquid discharge pipe 260 through an adjusting valve 280. In order to facilitate liquid discharge, the liquid discharge port 500 is located at the bottom end of the steam quality on-line detection system 10. Through the above arrangement, the steam quality on-line detection system 10 can be completely drained through the liquid discharge port 500 when it is shut down.

[0055] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not conflict, they should be considered within the scope of the present disclosure.

[0056] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be noted that for ordinary skilled persons in the art, several modifications 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 patent protection scope of the present application should be subject to the appended claims.

Claims

1. An on-line steam quality detection system, characterized by, The steam quality on-line detection system comprises an air inlet pipe, a non-condensable gas content detection unit, a superheat degree detection unit and a dryness degree detection unit, wherein: The air inlet pipe is used for outputting the steam to be detected; The non-condensable gas content detection unit comprises a first condenser and a non-condensable gas detector connected with the first condenser, the first condenser is connected with the air inlet pipe, the first condenser is used for condensing the steam to be detected and conveying the formed condensate and non-condensable gas to the non-condensable gas detector, and the non-condensable gas detector is used for detecting the content of the non-condensable gas in the input. The superheat degree detection unit comprises a first branch connected with the air inlet pipe, a first temperature detector is arranged on the first branch, and the first temperature detector is used for detecting the superheated steam temperature value of the steam to be detected in the first branch; The dryness degree detection unit comprises 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, a first pressure detector and a second temperature detector are arranged on the gas-liquid mixer, the output end of the gas-liquid mixer is connected with the input end of the second condenser, and the two ends of the circulation pipeline are connected with the output end of the second condenser and the input end of the gas-liquid mixer respectively.

2. The on-line steam quality detection system of claim 1, wherein The second condenser is arranged at the top of the gas-liquid mixer, the output end of the gas-liquid mixer is connected with the input end of the second condenser through a connecting pipeline, and a circulating pump is arranged on the connecting pipeline.

3. The on-line steam quality detection system of claim 1, wherein, The dryness degree detection unit further comprises a second input pipe, the two ends of the second input pipe are connected with the output end of the first condenser and the input end of the second condenser respectively.

4. The on-line steam quality detection system of claim 3, wherein, The non-condensable gas content detection unit further comprises a first conveying pipe, one end of the first conveying pipe is connected with the output end of the non-condensable gas detector, and the other end of the first conveying pipe is connected with the second input pipe.

5. The on-line steam quality detection system of claim 2, wherein, The steam quality on-line detection system further comprises a liquid outlet, the dryness degree detection unit further comprises a dryness degree output pipe, the dryness degree output pipe is arranged at a set height value of the gas-liquid mixer, the dryness degree output pipe connects the gas-liquid mixer with the liquid outlet, and a dryness degree control valve is arranged on the dryness degree output pipe.

6. The on-line steam quality detection system of claim 5, wherein, The superheat degree detection unit further comprises a second branch connected with the air inlet pipe, a third temperature detector is arranged on the second branch, one end of the second branch away from the air inlet pipe is connected with the liquid outlet, a drain valve is arranged on the second branch, and the drain valve is located between the third temperature detector and the liquid outlet.

7. The on-line steam quality detection system of claim 1, wherein A first throttling orifice is arranged on the first branch, and the first temperature detector is arranged on the first throttling orifice.

8. The on-line steam quality detection system of claim 4, wherein, The non-condensable gas detector comprises a gas collecting tank, a liquid conveying pipe, a gas conveying pipe and a condensate collecting tank, wherein: The input end of the gas collecting tank is connected with the first condenser; The liquid conveying pipe connects the bottom of the gas collecting tank with the bottom of the condensate collecting tank, a second pressure detector and a conveying control valve are arranged on the liquid conveying pipe; The gas delivery pipe is arranged at the upper end of the gas collection tank, and a gas control valve is further arranged on the gas delivery pipe.

9. The on-line steam quality detection system of claim 8, wherein, The steam quality on-line detection system further comprises an exhaust port, and one end of the gas delivery pipe away from the gas collection tank is in communication with the exhaust port.

10. The on-line steam quality detection system of claim 8, wherein, The non-condensable gas detector further comprises a first liquid discharge pipe, one end of the first liquid discharge pipe is in communication with the liquid delivery pipe, the other end of the first liquid discharge pipe is in communication with one end of the first delivery pipe away from the second input pipe, and a liquid discharge valve is arranged on the first liquid discharge pipe.

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