A pure steam quality testing device

Abstract

The present invention provides a pure steam quality detection device, including a pure steam sampling unit, a steam superheat detection unit, a dryness detection unit, a steam condensation unit, a steam condensate volume detection unit and a non-condensable gas volume detection unit, a pressurization and discharge unit, a logic control, calculation, data storage and transmission and a human-machine interface unit, and a logic for collecting the steam sample state through multiple sensors and deriving the steam quality index data through staged logic control and calculation. The pure steam quality detection device described in the present invention has high representativeness of steam samples, short detection time, high system integration, low error, and high repeatability of detection data; the detection data can be managed, the data cannot be modified, and the data can be recorded and printed or uploaded to other recording systems to ensure the reliability of drug production and manufacturing data; the device can be used fixedly or mobile, and can be applied to clean environment areas in the pharmaceutical industry, and has low installation requirements.

Description

Technical Field

[0001] The invention belongs to the technical field of steam quality detection of pure steam (clean steam) used in the pharmaceutical industry, and in particular relates to a pure steam quality detection device. Background Art

[0002] Pure steam (clean steam) is steam produced by steam generator from raw water (raw water must be treated to at least meet drinking water requirements). Pure steam (clean steam) in the pharmaceutical industry is usually used for clean air conditioning humidification, thermal disinfection or sterilization processes. At the same time, pure steam should not contain volatile additives to prevent contamination of drugs. For steam used for sterilization, the steam quality of steam needs to be tested and monitored: superheat, dryness value and non-condensable gas content, and it must meet the requirements of British standard EN285.

[0003] The current steam quality index detection devices for superheat, dryness and non-condensable gas content in the pharmaceutical industry have the following shortcomings:

[0004] The measurement process is cumbersome, the measurement time is long, and the labor cost is high;

[0005] During the measurement process, multiple operations and records need to be performed simultaneously. It is difficult to perform these operations and records manually, which results in deviations in the recorded data and large errors in the calculated data results.

[0006] The accuracy of the test results is limited by the operating level of the analysts. Due to the different levels of analysts, the test results of different analysts have high dispersion and poor repeatability.

[0007] The test results are recorded through paper documents or other recording devices, which makes the result data easy to be modified by humans and cannot be controlled, and cannot meet the reliability requirements of drug production and manufacturing data.

[0008] Since the steam quality test is being carried out, the steam temperature is high and the pressure is high, which can easily cause burns to the analysts if they are not careful. The transmission pipelines are all made of rubber hoses. If there is an operation error, steam leakage and spraying will occur, which is a great safety hazard.

[0009] Patent document No. CN104011527A discloses a system and method for continuously and automatically measuring steam quality, including a steam quality / superheat meter and a non-condensable gas (NCG) meter.

[0010] The sampling mechanism takes samples from the wall of the steam main pipe, and the sample representativeness is a bit low.

[0011] The heating amount and the quality of the steam sample in the measurement of steam dryness value by the heating method are key parameters. The actual heating amount of the steam is closely related to the heat dissipation of the system. Although the dryness meter has an outer insulation design to reduce heat dissipation, the steam in the dryness meter becomes superheated steam after heating, which cannot eliminate the heat transfer between the steam inside the dryness meter and the steam outside the dryness meter. There are also some other factors affecting the heat dissipation of the conveying mechanism, which leads to large errors in the measured value of dryness and complicated correction work.

[0012] The quality of the steam sample is also a key parameter. The quality of the steam sample entering the detection system is quantitatively calculated by fixing the orifice opening and using the pressure correction before the orifice. Since the system pressure of the steam delivery system being tested usually fluctuates with the transmission rate of the steam in the steam delivery system being tested or the start and stop of the point valve, the quality of the steam sample entering the dryness meter changes. At the same time, the steam in the dryness meter is driven by the steam sample pressure to continuously flow through the heating tube in the dryness meter. The temperature of the heated steam is detected from the outlet of the dryness meter. This is a continuous detection rather than a stage detection. When the pressure in the steam delivery system being tested fluctuates, there is a certain time difference in the temperature change after reaching the dryness meter (the temperature change caused by the change in the quality of the steam sample). Due to the existence of the time difference, the dryness error calculated by the data of the two is relatively large.

[0013] For the detection of non-condensable gas volume and steam condensate volume, a gas differential pressure gauge is used to measure the liquid level differential pressure, and then the volume of gas or water is calculated through a logic controller. The gas differential pressure gauge is easily affected by the water or water vapor being detected. For example, if water enters the instrument, the gas differential pressure gauge will be damaged, and the detection will fail.

[0014] The steam condensate volume detection container and the non-condensable gas detection container have no overflow prevention measures. When the differential pressure gauge fails, the pressure fluctuation of the steam delivery unit being detected is large, and there is back pressure at the device drain port, the steam condensate will overflow from the corresponding detection container, causing damage to other parts or electrical components. At the same time, when there is back pressure at the device drain port, the device will not be able to complete the next steam quality detection process. Summary of the invention

[0015] In view of this, the present invention aims to overcome the defects existing in the above-mentioned prior art and proposes a pure steam quality detection device, which solves the problems of high safety risks of manual operation, cumbersome measurement process, long measurement time, low reliability of detection data, etc. in the manual detection method used in the existing industry, and solves the problems of low representativeness of sampling samples of integrated devices in the existing industry, high requirements for installation conditions, inability to move or transfer, and inability to be used in clean environment areas of the pharmaceutical industry.

[0016] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0017] A pure steam quality detection device comprises a pure steam sampling unit, a control unit, and a steam superheat detection unit, a steam condensation unit, a steam saturated water phase separation unit, a steam condensate volume detection unit and a non-condensable gas volume detection unit, and a pressurization discharge unit connected to the control unit;

[0018] The pure steam sampling unit comprises a pure steam sampling tube and a steam condensate water collecting tube;

[0019] The pure steam sampling tube is an L-shaped structure, with a non-condensable gas detection interface provided on the upper part of the horizontal tube, a superheat detection interface provided at the concentric position of the elbow, and a dryness detection interface provided on the side wall of the vertical tube; the bottom of the vertical tube of the pure steam sampling tube is connected to the steam condensate water collecting pipe, and a steam trap is provided at the bottom of the steam condensate water collecting pipe;

[0020] The superheat detection interface is connected to the steam superheat detection unit;

[0021] The dryness detection interface is connected to the steam saturated water phase separation unit, and the dry steam outlet of the steam saturated water phase separation unit is connected to the steam condensation unit; the steam condensation unit is also connected to the non-condensable gas detection interface; a pressure sensor P1 is provided on the transmission pipeline between the steam condensation unit and the non-condensable gas detection interface; the pressure sensor P1 is connected to the control unit;

[0022] The outlet of the steam condensation unit is connected to a steam condensation water volume detection unit and a non-condensable gas volume detection unit;

[0023] The control unit is also connected to a host computer.

[0024] Furthermore, the steam superheat detection unit includes a pure steam flow guide pipe, a flow limiting pipe, a shell, and a temperature sensor T1; the temperature sensor T1 is connected to the control unit;

[0025] The current limiting tube is located in the shell, a steam outlet is provided at the lower part of the shell, and the current limiting tube is in the pure steam superheat detection cavity; the current limiting tube is installed on the superheat detection interface through a quick connector;

[0026] One end of the pure steam flow guide pipe extends into the horizontal pipe of the pure steam sampling pipe and remains concentric therewith, and the other end is located in the current limiting pipe; the temperature sensor T1 is connected to the end of the housing away from the superheat detection interface through a quick connector, and the probe of the temperature sensor T1 extends into the pure steam superheat detection cavity;

[0027] One end of the pure steam flow guide pipe located in the horizontal pipe of the pure steam sampling pipe is provided with a fixedly connected nozzle.

[0028] Furthermore, the steam superheat detection unit includes a pure steam flow guide pipe, a flow limiting pipe, a shell, and a temperature sensor T1; the temperature sensor T1 is connected to the control unit;

[0029] The current limiting tube is located in the shell, a steam outlet is provided at the lower part of the shell, and the current limiting tube is in the pure steam superheat detection cavity; the current limiting tube is installed on the superheat detection interface through a quick connector;

[0030] One end of the pure steam flow guide pipe extends into the horizontal pipe of the pure steam sampling pipe and remains concentric therewith, and the other end is located in the current limiting pipe; the temperature sensor T1 is connected to the end of the housing away from the superheat detection interface through a quick connector, and the probe of the temperature sensor T1 extends into the pure steam superheat detection cavity;

[0031] A detachably connected nozzle is provided between the flow limiting tube and the superheat detection interface.

[0032] Furthermore, the steam-saturated water phase separation unit includes a steam-saturated water phase separation mechanism, a solenoid valve V1, a solenoid valve V2, and a fine-tuning valve V3;

[0033] One end of the solenoid valve V1 is connected to the dryness detection interface through a quick connector, and the other end is connected to the steam phase separation mechanism; a liquid level gauge L1 is provided at the bottom of the steam phase separation mechanism for detecting the liquid level in the saturated water meter below the steam phase separation mechanism;

[0034] The steam phase separation mechanism is provided with a dry steam outlet near the bottom;

[0035] A saturated water discharge port is provided below the dry steam outlet, and the saturated water discharge port is connected to the solenoid valve V2 and the fine-tuning valve V3

[0036] The solenoid valve V1, the solenoid valve V2 and the liquid level meter L1 are all connected to the control unit.

[0037] Further, the steam condensation unit includes a steam condenser and a fine-tuning valve V5;

[0038] The pure steam inlet of the steam condenser is connected to the dry steam outlet and the non-condensable gas detection interface, and the condensed water outlet of the steam condenser is connected to the fine-tuning valve V5; the steam condenser is also provided with a temperature sensor T2 and a temperature sensor T3;

[0039] The cooling water outlet of the steam condenser is also provided with a solenoid valve V4

[0040] The temperature sensor T2, the temperature sensor T3, and the solenoid valve V4 are all connected to the control unit.

[0041] Furthermore, the steam condenser adopts but is not limited to a coil heat exchanger, in which the steam exchanges heat with the cooling water in countercurrent.

[0042] Furthermore, the steam condensate volume detection unit and the non-condensable gas volume detection unit are also connected to an electric diaphragm pump and a one-way valve.

[0043] Compared with the prior art, the present invention has the following advantages:

[0044] The sampling structure mentioned in EN285 is adopted to ensure that the steam sample is representative.

[0045] The phase separation method is adopted, and the saturated water separation mechanism is used in combination with the steam condensation and condensed water volume detection unit to detect the steam dryness value through a logic controller. The heat dissipation during the detection process is a non-critical parameter, which reduces the error caused by heat dissipation. During the dryness detection process, the pressure in the phase separation mechanism is the same as the pressure of the steam delivery system being detected, which is a pressurized online detection. At the same time, a staged detection method is adopted to avoid errors caused by pressure fluctuations in the steam delivery system being detected at a certain point in time or stage.

[0046] An ultra-small range ultrapure water level electrode is used to detect the liquid level of non-condensable gas volume and steam condensate volume, and then the volume of gas or water is calculated through a logic controller. The detection instrument is not affected by the detected water or water vapor.

[0047] The non-condensable gas detection unit adopts a closed design, without overflow risk. The steam condensate volume detection container is equipped with an anti-overflow device, without overflow risk. At the same time, the breathing port of the device is equipped with a sterilization grade filter, which can be used in clean environment areas of the pharmaceutical industry.

[0048] The sampling unit and multiple analysis and detection units are integrated. After integration, the device can be moved and used. The detection components are not affected by the movement process and do not need to be corrected after movement. It can also be divided into two parts of integration: the sampling unit is combined with the superheat detection unit, and connected to the dryness and non-condensable gas measurement unit assembly through the insulation pipe, and then fixed for use. The above two integration methods have the same composition units and principles. After the two-part integration method is divided into two parts, the transmission insulation pipe between different units becomes longer.

[0049] A pressurized discharge device is used to discharge the condensed water under pressure after stage testing. The presence or absence of back pressure at the discharge port of the device does not affect the steam quality testing process.

[0050] The use of automated testing systems avoids safety hazards and human errors caused by manual operation, and achieves repeatability of test data. At the same time, the test data is managed by authority, the data cannot be modified, and the data can be recorded and printed or uploaded to other recording systems to ensure the reliability of drug production and manufacturing data. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0052] Figure 1 This is a schematic diagram of the components of the pure steam quality detection device (phase separation method) according to an embodiment of the present invention;

[0053] Figure 2 This is a schematic diagram of a composition embodiment of a pure steam sampling unit according to an embodiment of the present invention;

[0054] Figure 3 This is a schematic diagram of a first embodiment of the composition of a pure steam superheat detection unit according to an embodiment of the present invention;

[0055] Figure 4 This is a schematic diagram of a second embodiment of the composition of a pure steam superheat detection unit according to an embodiment of the present invention;

[0056] Figure 5 This is a schematic diagram of a composition embodiment of a steam saturated water phase separation unit according to an embodiment of the present invention;

[0057] Figure 6 This is a schematic diagram of a first embodiment of the steam saturated water phase separation mechanism S4 according to an embodiment of the present invention;

[0058] Figure 7 This is a schematic diagram of a second embodiment of the steam saturated water phase separation mechanism S4 according to an embodiment of the present invention;

[0059] Figure 8 This is a schematic diagram of a composition embodiment of a steam condensing unit according to an embodiment of the present invention;

[0060] Fig. 9 This is a schematic diagram of a first embodiment of the steam condensate volume detection and non-condensable gas volume detection unit according to an embodiment of the present invention;

[0061] Fig.10 This is a schematic diagram of a second embodiment of the steam condensate volume detection and non-condensable gas volume detection unit according to an embodiment of the present invention;

[0062] Fig.11 This is a schematic diagram of the steam quality index detection logic control flow according to an embodiment of the present invention;

[0063] Fig.12 It is a schematic diagram of the logic control flow of the staged detection and correction of the dryness value according to the embodiment of the present invention;

[0064] Fig.13 The present invention is a schematic diagram of the logic control flow of the phased detection and correction of the non-condensable gas content value according to an embodiment of the present invention.

[0065] Description of reference numerals:

[0066] 1. Pure steam inlet; 2. Non-condensable gas detection interface; 3. Superheat detection interface; 4. Dryness detection interface; 5. Steam condensate outlet; 6. Pure steam inlet; 7. Quick connector; 8. Calibrated nozzle; 9. Steam outlet; 10. Steam outlet; 11. Saturated water outlet. 12. Pure steam inlet; 13. Condensate outlet; 14. Cooling water inlet; 15. Cooling water outlet. 16. Condensate inlet; 17. Non-condensable gas outlet; 18. Breathing port; 19. Steam condensate outlet; U1. Pure steam sampling tube; U2. Steam condensate collecting pipe; U3. Steam trap; U4. Steam superheat detection unit; U5. Steam saturated water phase separation unit; U6. Steam condensation unit; U7. Steam condensate volume detection and non-condensable gas volume detection unit; U8. Boost discharge unit; U9. Control unit; S1. Pure steam guide tube; S2. Flow limiting tube; S3. Shell; S4. Steam saturated water phase separation mechanism; S5. Steam condenser; S6. Steam condensate volume detector; S7. Overflow weir; S8. Non-condensable gas volume detector; S411. Steam saturated water meter; S412. Steam insulation shell; S413. Saturated water collecting shell; S414. Saturated water guide plate; S415. External spiral; S416. Steam guide tube. S421, steam saturated water meter; S422, steam insulation shell; S423, saturated water collecting shell; S424, outer spiral; S425, spoiler. DETAILED DESCRIPTION

[0067] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0068] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0069] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0070] Pure steam (clean steam) is steam produced by steam generator from raw water (raw water must be treated to at least meet drinking water requirements). Pure steam (clean steam) in the pharmaceutical industry is usually used for clean air conditioning humidification, thermal disinfection or sterilization processes. At the same time, pure steam should not contain volatile additives to prevent contamination of drugs. For steam used for sterilization, the steam quality of steam needs to be tested and monitored: superheat, dryness value and non-condensable gas content, and it must meet the requirements of British standard EN285.

[0071] The following are the definitions of each value for reference.

[0072] Superheat: The temperature difference between superheated steam and saturated steam at the same atmospheric pressure is the superheat of superheated steam. Superheated steam is not suitable for steam sterilization and may cause sterilization failure, and is more likely to char the sterilized items or accelerate the aging of the sterilized items. European standards require that the difference between the temperature of steam used for steam sterilization released to atmospheric pressure and the boiling point of water at atmospheric pressure should not exceed 25°C.

[0073] Dryness: The ratio of dry saturated steam to saturated steam in saturated steam is the dryness value of saturated steam. The dryness value is a measure of the internal heat energy of saturated steam. European standards require that the dryness value of steam used for steam sterilization should not be less than 0.9, and for metal loads, the dryness value of steam should not be less than 0.95.

[0074] Non-condensable gas: In the process of steam sterilization, the gas that cannot be liquefied after compression within a certain temperature and pressure range, that is, the gas in the steam that cannot condense into water. In the process of sterilization, the non-condensable gas in the steam will affect the performance and process of sterilization, causing overheating in the sterilization chamber, unstable operation of the air detector, and failure of the Bowie-Dick test. European standards require that the volume content of non-condensable gas in steam used for steam sterilization shall not exceed 3.5%.

[0075] At the same time, the three indicators of pure steam quality should be managed to meet the acceptance or testing of steam generator equipment, daily quality verification and production batch records in the production process of pharmaceutical companies, so as to ensure the reliability of pharmaceutical production and manufacturing data.

[0076] Steam dryness can be determined by several methods, including artificial test methods, thermodynamic methods, non-thermodynamic methods, mathematical model methods, etc. Among the thermodynamic methods, there are throttling method, mixing method, heating method, phase separation method, and condensation method. Among the non-thermodynamic methods, there are optical measurement method, microwave measurement method, radiation method, conductivity method, and tracer method. Among the mathematical model methods, there are soft measurement method and volume change measurement method. At present, many methods or devices for measuring steam dryness have been disclosed in the petrochemical, energy and other industries.

[0077] There are currently two methods for measuring steam dryness in the pharmaceutical industry:

[0078] The first method is to use the condensation method in the thermodynamic method to measure the dryness. For details, please refer to the first and second forms of the pharmaceutical industry steam quality detection methods below.

[0079] The second method is to use the heating method in the thermodynamic method to measure the dryness. For details, please refer to the third form of the steam quality detection method in the pharmaceutical industry below.

[0080] This scheme is a comprehensive device for detecting three steam quality indicators, namely steam superheat, non-condensable gas and dryness. The dryness detection process can adopt the throttling method, mixing method, heating method, phase separation method and condensation method in thermodynamic methods; it can also adopt the optical measurement method, microwave measurement method, radiation method, conductivity method and tracer method in non-thermodynamic methods. The following is an example of dryness measurement using the phase separation method in thermodynamic methods. The patent claims not only include the comprehensive device for dryness measurement using the phase separation method described in the patent, but also include the comprehensive device for dryness measurement using the throttling method, mixing method, heating method, phase separation method, condensation method, optical measurement method, microwave measurement method, radiation method, conductivity method and tracer method.

[0081] In the pharmaceutical industry, the current measurement methods for steam superheat and non-condensable gases are based on the measurement principles mentioned in the British standard EN285 "Sterilization-Steam Sterilizers-Large Sterilizers". There are differences in implementation form, automation system and data control. For details, see the description of steam quality detection methods in the pharmaceutical industry below.

[0082] At present, there are several types of detection devices for the three indicators of steam quality in the pharmaceutical industry: superheat, dryness and non-condensable gas content:

[0083] First form:

[0084] Manual measurement and data recording are performed through main tools such as needle valves, droppers, measuring cups, funnels, measuring cylinders, pitot tubes, expansion tubes, temperature sensors, vacuum bottles, electronic balances, and some auxiliary tools such as hoses and ear bulbs.

[0085] Each steam indicator uses a corresponding measuring tool to manually perform steam sampling, analysis and calculation, and data recording.

[0086] Non-condensable gas measurement method:

[0087] Connect the corresponding tools; before testing, close the steam valve, use the ear bulb to absorb cooling water to the top of a certain scale or any scale close to the top, remove the ear bulb and stop drawing water; slowly open the steam valve, when water begins to flow out of the measuring cylinder, you can start timing, and at the same time record the liquid level Va in the measuring cylinder and record the top air scale as Vb (i.e. blank scale).

[0088] When the overflowing water reaches a certain volume, close the steam valve and record the overflowing water as Vc; during this period, the non-condensable gas will accumulate to the top of the burette, and the gas volume Vd is recorded.

[0089] Percentage of non-condensable gas = (Vd-Vb) / (Vc-Va) x 100%

[0090] How to measure superheat:

[0091] Connect the corresponding tools; when the steam supply is turned on for the first time, the steam enters the expansion tube through the Pitot tube, and the temperature is measured by the temperature sensor above the expansion tube, and the temperature (T) at the same time.

[0092] Superheat = T-T0 (the boiling point of water at local atmospheric pressure).

[0093] Dryness measurement method:

[0094] Connect the corresponding tools; weigh the vacuum bottle and the components, and record the weight (M1); add a certain amount of low-temperature water to the vacuum bottle, put in the first temperature sensor and weigh it, and record the weight (M2); shake the vacuum bottle at the same time and record the temperature of the water in the bottle (T0).

[0095] Slowly open the steam valve and steam enters the vacuum bottle through the hose; when the temperature in the bottle is about 80-90℃, close the steam inlet valve and record the weight of the vacuum bottle and parts (M3); at the same time, shake the water in the vacuum bottle to ensure complete mixing and record the temperature of the water (T1).

[0096] The average temperature (T) is calculated by a second temperature sensor.

[0097] Dryness value = (T1-T0)(4.18*(M2-M1)+0.23) / L*(M3-M2)-4.18(T-T1) / L

[0098] In the formula, L is the potential heat of drying saturated steam at the average temperature T, which is obtained by looking up the table.

[0099] Advantages and disadvantages of the above forms:

[0100] advantage:

[0101] The measuring device is simple and the equipment cost is low.

[0102] The sampling mechanism refers to the sampling structure mentioned in EN285 to ensure that the samples are representative.

[0103] The equipment can be easily transferred.

[0104] shortcoming:

[0105] The measurement process is cumbersome, the measurement time is long, and the labor cost is high;

[0106] During the measurement process, multiple operations and records need to be performed simultaneously. It is difficult to perform these operations and records manually, which results in deviations in the recorded data and large errors in the calculated data results.

[0107] The accuracy of the test results is limited by the operating level of the analysts. Due to the different levels of analysts, the test results of different analysts have high dispersion and poor repeatability.

[0108] The test results are recorded through paper documents or other recording devices, which makes the result data easy to be modified by humans and cannot be controlled, and cannot meet the reliability requirements of drug production and manufacturing data.

[0109] Since the steam quality test is being carried out, the steam temperature is high and the pressure is high, which can easily cause burns to the analysts if they are not careful. The transmission pipelines are all made of rubber hoses. If there is an operation error, steam leakage and spraying will occur, which is a great safety hazard.

[0110] Second form:

[0111] The principle and operation method are the same as the first one, and manual measurement and data recording are also performed through the main tools such as needle valve, dropper, measuring cylinder, pitot tube, expansion tube, temperature sensor, vacuum bottle, electronic balance, and some auxiliary tools such as hose and ear bulb. The difference is that there is an additional condenser in the non-condensable gas measurement process, and the measuring cup and funnel are no longer used. The condenser, measuring cup and funnel are inherited to a stainless steel device, as shown in the device under the red ear bulb in the figure below (the ear bulb, dropper, etc. are the same as the first form). In the first form, the steam comes out directly from the needle valve through the rubber tube and enters the bottom of the inverted funnel in the measuring cup, and the steam is condensed by the water in the measuring cup. In the second form, the steam comes out from the needle valve and then enters a condenser, condenses through the condensed gas, and then enters the bottom of the inverted funnel in the stainless steel measuring cup.

[0112] Advantages and disadvantages of the above forms:

[0113] The disadvantages are the same as the first form.

[0114] The advantages include simple measuring device, low equipment cost, representative sampling and convenient equipment transfer. After adding the condenser, the steam has turned into water before entering the measuring cup. At the same time, an operating valve is added to the stainless steel device, so it is relatively safer than the first form in the process of non-condensable gas measurement. The other two measurement processes are the same.

[0115] The third form:

[0116] The third form is the patent technology solution with application number 201280062485.6 and authorization announcement number CN104011527A, which will not be described here.

[0117] Advantages and disadvantages of the above forms:

[0118] advantage:

[0119] One device can detect three quality indicators of steam quality with short detection time and high system integration.

[0120] The system runs fully automatically, and controls, calculates, and stores and uploads data through a logic controller. This eliminates the potential safety hazards during manual operation. It also eliminates the human errors caused by manual operation, and the test data has high repeatability.

[0121] The test data can be managed, the data cannot be modified, and the data can be recorded, printed or uploaded to other recording systems to ensure the reliability of drug production and manufacturing data.

[0122] shortcoming:

[0123] The sampling mechanism takes samples from the wall of the steam main pipe, and the sample representativeness is a bit low.

[0124] The heating amount and the quality of the steam sample in the measurement of steam dryness value by the heating method are key parameters. The actual heating amount of the steam is closely related to the heat dissipation of the system. Although the dryness meter has an outer insulation design to reduce heat dissipation, the steam in the dryness meter becomes superheated steam after heating, which cannot eliminate the heat transfer between the steam inside the dryness meter and the steam outside the dryness meter. There are also some other factors affecting the heat dissipation of the conveying mechanism, which leads to large errors in the measured value of dryness and complicated correction work.

[0125] The quality of the steam sample is also a key parameter. The quality of the steam sample entering the detection system is calculated by fixing the orifice opening and using the theorem correction of the pressure before the orifice. Since the system pressure of the steam delivery system being tested usually fluctuates with the transmission rate of the steam in the steam delivery system being tested or the start and stop of the point valve in the actual operation, the quality of the steam sample entering the dryness meter changes. At the same time, the steam in the dryness meter is driven by the steam sample pressure to continuously flow through the heating tube in the dryness meter. The temperature of the heated steam is detected from the outlet of the dryness meter. This is a continuous detection rather than a stage detection. When the pressure in the steam delivery system being tested fluctuates, there is a certain time difference in the temperature change after reaching the dryness meter (the temperature change caused by the change in the quality of the steam sample). Due to the existence of the time difference, the dryness error calculated by the data of the two is relatively large.

[0126] For the detection of non-condensable gas volume and steam condensate volume, a gas differential pressure gauge is used to measure the liquid level differential pressure, and then the volume of gas or water is calculated through a logic controller. The gas differential pressure gauge is easily affected by the water or water vapor being detected. For example, if water enters the instrument, the gas differential pressure gauge will be damaged, and the detection will fail.

[0127] The steam condensate volume detection container and the non-condensable gas detection container have no overflow prevention measures. When the differential pressure gauge fails, the pressure fluctuation of the steam delivery unit being detected is large, and there is back pressure at the device drain port, the steam condensate will overflow from the corresponding detection container, causing damage to other parts or electrical components. At the same time, when there is back pressure at the device drain port, the device will not be able to complete the next steam quality detection process.

[0128] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0129] The pure steam quality index detection device is improved as follows to address the shortcomings of the prior art:

[0130] The sampling structure mentioned in EN285 is adopted to ensure that the steam sample is representative.

[0131] The phase separation method is adopted, and the saturated water separation mechanism is used in combination with the steam condensation and condensed water volume detection unit to detect the steam dryness value through a logic controller. The heat dissipation during the detection process is a non-critical parameter, which reduces the error caused by heat dissipation. During the dryness detection process, the pressure in the phase separation mechanism is the same as the pressure of the steam delivery system being detected, which is a pressurized online detection. At the same time, a staged detection method is adopted to avoid errors caused by pressure fluctuations in the steam delivery system being detected at a certain point in time or stage.

[0132] An ultra-small range ultrapure water level electrode is used to detect the liquid level of non-condensable gas volume and steam condensate volume, and then the volume of gas or water is calculated through a logic controller. The detection instrument is not affected by the detected water or water vapor.

[0133] The non-condensable gas detection unit adopts a closed design, without overflow risk. The steam condensate volume detection container is equipped with an anti-overflow device, without overflow risk. At the same time, the breathing port of the device is equipped with a sterilization grade filter, which can be used in clean environment areas of the pharmaceutical industry.

[0134] The sampling unit and multiple analysis and detection units are integrated. After integration, the device can be moved and used. The detection components are not affected by the movement process and do not need to be corrected after movement. It can also be divided into two parts of integration: the sampling unit is combined with the superheat detection unit, and connected to the dryness and non-condensable gas measurement unit assembly through the insulation pipe, and then fixed for use. The above two integration methods have the same composition units and principles. After the two-part integration method is divided into two parts, the transmission insulation pipe between different units becomes longer.

[0135] A pressurized discharge device is used to discharge the condensed water under pressure after stage testing. The presence or absence of back pressure at the discharge port of the device does not affect the steam quality testing process.

[0136] The use of automated testing systems avoids safety hazards and human errors caused by manual operation, and achieves repeatability of test data. At the same time, the test data is managed by authority, the data cannot be modified, and the data can be recorded and printed or uploaded to other recording systems to ensure the reliability of drug production and manufacturing data.

[0137] Pure steam quality index detection device (phase separation method) components such as Figure 1 shown.

[0138] Among them, U1, U2, and U3 together constitute a pure steam sampling unit. And it includes collecting the state of steam samples through sensors in each unit, and deriving the logic of steam quality index data through staged logic control and calculation. This embodiment lists the steam quality detection device composed of dryness measurement using the phase separation method. Other steam dryness measurement methods: throttling method, mixing method, heating method, condensation method, optical measurement method, microwave measurement method, radiation method, conductivity method, and tracer method are compared with this embodiment. Except for the different composition of the steam saturated water phase separation unit U5, the other component units are the same and will not be repeated here. The methods are all within the scope of the patent requirements.

[0139] The implementation examples and principles of each unit of the present invention are as follows:

[0140] 1. Pure steam sampling unit

[0141] exist Figure 2In the sampling unit composition embodiment, the pure steam inlet 1 is connected to the steam outlet / sampling port of the steam delivery network to be detected through an insulation pipe, and the steam enters the pure steam sampling tube U1 from port 1. The steam condensate water collecting pipe U2 is quickly connected below the sampling tube outlet. The steam condensate water collecting pipe outlet is quickly connected to the steam trap / throttle valve U3. After the steam enters the sampling tube, part of it becomes condensed water due to condensation or heat dissipation. The steam condensate is collected in the collecting pipe and automatically discharged through the steam trap outlet 5, while the steam cannot pass through the steam trap, thereby reducing the consumption and waste of steam.

[0142] A non-condensable gas detection interface 2 is set at a designated position on the horizontal pipe of the steam sampling pipe U1, a superheat detection interface 3 is set at a concentric position of the elbow of the sampling pipe U1, and a dryness detection interface 4 is set at a designated position on the side wall of the vertical pipe of the sampling pipe U1. The above interfaces are respectively connected to each subsequent detection unit through a steam transmission pipe. In order to meet the requirements of the steam trap for the condensate level height and the requirements of the EN285 standard, the above component sizes, interface positions, etc. have specific size and position requirements.

[0143] 2. Pure steam superheat detection unit

[0144] The pure steam superheat detection unit is divided into two embodiments, the first embodiment is a fixed nozzle type, and the second embodiment is a replaceable nozzle type.

[0145] like Figure 3 The pure steam superheat detection unit shown in the embodiment 1

[0146] exist Figure 3 In the first embodiment of the composition of the steam superheat detection unit, the steam flow guide pipe S1, the flow limiting pipe S2, and the shell S3 are fixed in position to form a pure steam superheat detection chamber. After the steam flow guide pipe S1 enters the detection chamber, it is provided with a non-working, calibrated nozzle 8 at the outlet end. The flow limiting pipe S2 is provided with a steam outlet at the end away from the nozzle 8. The temperature sensor T1 is installed with the shell S3 through a quick connector, and the probe of the temperature sensor T1 extends into the pure steam superheat detection chamber.

[0147] exist Figure 4 In the second embodiment of the composition of the steam superheat detection unit, the steam flow guide pipe S1 and the quick connector are combined into component A through a fixed position, and the flow limiting pipe S2, the shell S3 and the quick connector are fixed to form a pure steam superheat detection chamber B. The calibrated nozzle 8 is installed between component A and the detection chamber B and is sealed by a seal. The nozzle 8 can be replaced by disassembling the quick connector. The flow limiting pipe S2 has a steam outlet at the end away from the nozzle 8. The temperature sensor T1 is installed with the shell S3 through the quick connector, and the probe of the temperature sensor T1 extends into the pure steam superheat detection chamber.

[0148] The first and second embodiments of the pure steam superheat detection unit are both connected and installed with the superheat detection interface 3 of the pure steam sampling unit through the quick connector 7. The pure steam guide pipe S1 will extend into the specified position in the horizontal pipe of the pure steam sampling unit and remain concentric with it. The steam sample at the center of the horizontal pipe of the pure steam sampling unit enters the guide pipe through the inlet 6, and enters the pure steam superheat detection chamber through the nozzle 8 without doing work. The steam is in a high-pressure steam state before passing through the nozzle 8. After passing through the nozzle 8, the pressure becomes normal pressure (one atmosphere). The excess heat in the entropy change process will make the steam superheated. The temperature of the superheated steam is detected by the temperature sensor T1. The detected steam enters between the flow limiting pipe and the shell S3 through the steam outlet of the flow limiting pipe S2, and is finally discharged through the steam outlet 9. An absolute pressure gauge is provided on the discharge pipeline to detect the pressure value in the discharge pipeline.

[0149] Using the temperature value and absolute pressure value of the temperature sensor T1, refer to multiple steam tables to detect the superheat value of pure steam. Using the superheat value of pure steam and the detection value of the pressure sensor P1 in the non-condensable gas detection unit (to be explained later), use the logic control calculation unit U9 to refer to multiple steam tables to confirm whether the current steam sample is overheated and whether the dryness value can be calculated. If the sample is in an overheated state, the sample will not be tested for dryness and non-condensable gas content. If the dryness value can be calculated, the sample will not be tested for dryness, and the non-condensable gas content will be tested directly. If the dryness value cannot be calculated, the sample will be tested for dryness, and then the non-condensable gas content will be tested.

[0150] 3. Steam saturated water phase separation unit

[0151] exist Figure 5 In the embodiment of the steam saturated water phase separation unit, the steam sample is sampled through the steam dryness detection interface 4 of the embodiment of the quick connector and the pure steam sampling unit. After that, the steam sample enters the steam phase separation mechanism from the valve V1, and after being separated by the phase separation mechanism, it is divided into saturated water and dry steam. The saturated water is collected in the saturated water meter below the phase separation mechanism, and is detected in real time by the liquid level meter L1. The saturated water is controlled by the V2 valve and discharged after being adjusted by V3. The dry steam exits the phase separation mechanism at the steam outlet 10 and enters the rear steam condensation unit.

[0152] There are many implementation methods for the steam saturated water phase separation mechanism S4: vertical or horizontal gravity sedimentation separation, impact sedimentation separation, grid or blade separation, wire mesh or fiber layer separation, spiral separation and other single methods and combination methods of the methods. Herein, two phase separation mechanism embodiments consisting of a combination of gravity sedimentation and spiral separation methods are listed, and the remaining methods are as far as possible within the scope of the patent requirements.

[0153] exist Figure 6In the first embodiment of the composition of the steam saturated water phase separation mechanism S4, steam enters the separation mechanism from the top and moves downward. When it reaches the bottom of the saturated water guide plate S414, it turns back upward. The saturated water droplets in the steam are subjected to gravity sedimentation during the 180° turning back process, and are gathered at the bottom of the saturated water guide plate S414, flow out through the horizontal water outlet groove of the side wall, and enter the steam saturated water meter S411 below. After the steam turns back upward, it enters the spiral channel composed of the saturated water guide plate S414 and the outer spiral body S415, performs high-speed centrifugal motion, and performs spiral separation. The saturated water droplets in the steam are gathered on the inner wall of the saturated water guide plate S414 under centrifugal force, flow out through the vertical water outlet groove of the side wall, and enter the steam saturated water meter S411 below. After separation, the steam moves downward through the interlayer composed of the saturated water collection shell S413 and the saturated water guide plate S414, enters the outer insulation layer through the steam guide pipe S416, and finally enters the next unit through the steam outlet. The temperature of the steam in the insulation layer is basically the same as the saturated water temperature in the steam and water meter, so that the saturated water meter forms an adiabatic state, avoiding the influence of heat dissipation on the detection results.

[0154] exist Figure 7 In the second embodiment of the composition of the steam saturated water phase separation mechanism S4, steam enters the separation mechanism from the top and moves downward. Enter the spiral channel composed of the saturated water collection shell S423 and the outer spiral body S424, perform high-speed centrifugal motion, and perform spiral separation. The saturated water droplets in the steam are collected on the inner wall of the saturated water collection shell S423 under centrifugal force, move downward through the push of steam, and enter the steam saturated water meter S421 below. After the steam exits the spiral channel, it is turned back 180° upward, enters the outer insulation layer through the air outlet at the top, and finally enters the next unit through the steam outlet. The saturated water droplets entrained in the steam are subjected to gravity sedimentation during the return process and are collected in the saturated water meter S421. The temperature of the steam in the insulation layer is substantially the same as the saturated water temperature in the steam saturated water meter, so that the saturated water meter forms an adiabatic state, avoiding the influence of heat dissipation on the test results.

[0155] The saturated water content in the steam during the stage time is measured by the above-mentioned steam saturated water meter, and then the dry steam content is measured by the steam condensate volume detection and non-condensable gas volume detection unit U7, and the steam dryness value is calculated by the logic control and calculation unit U9.

[0156] 4. Steam condensing unit

[0157] exist Figure 8In the steam condensation unit composition embodiment, there are two types of steam samples: one is dry steam after phase separation, which comes from the steam outlet 10 in the steam saturated water phase separation unit composition embodiment; the other is a steam sample for detecting the non-condensable gas content of steam, which is taken from the non-condensable gas detection interface 2 in the pure steam sampling unit composition embodiment. The non-condensable gas steam sample transmission pipeline is equipped with a pressure sensor P1. Different steam samples are entered at different steam quality inspection index measurement stages.

[0158] The steam sample enters the condenser S5 from the pure steam inlet 12. The condenser S5 is a coil heat exchanger in which the steam exchanges heat with the cooling water in countercurrent. After condensation, the steam flows out after the flow rate is adjusted by the fine-tuning valve V5. The operation of the steam condensation unit is monitored in real time through the temperature sensors T2 and T3. At the same time, the temperature sensor T3 is also used as an important parameter for non-condensable gas volume correction. Condensed water that does not meet the temperature standard will be discharged. After the temperature is qualified, it will enter the subsequent steam condensed water volume detection and non-condensable gas volume detection unit.

[0159] 5. Steam condensate volume detection and non-condensable gas volume detection unit

[0160] The steam condensate volume detection and non-condensable gas volume detection unit are divided into two embodiments, the first embodiment is an integrated type, and the second embodiment is a split type.

[0161] exist Fig. 9 In the first embodiment of the composition of the steam condensate volume detection and non-condensable gas volume detection unit, the steam condensate with qualified temperature first enters the non-condensable gas volume detector S8, and the non-condensable gas in the condensate is collected above the non-condensable gas volume detector S8, and the non-condensable gas volume is detected by the liquid level meter L3. When the amount of non-condensable gas reaches a certain height, it is controlled by the solenoid valve V6 and discharged at the non-condensable gas outlet 17. The condensate without non-condensable gas flows downward and enters a container of a certain height composed of the overflow weir S7 through the outlet below the non-condensable gas volume detector S8. When the liquid level exceeds the height of the overflow weir S7, it enters the steam condensate volume detector S6, and the steam condensate volume is detected by the liquid level meter L2. Among them, the height of the overflow weir S7 will be used for correction in the process of non-condensable gas volume detection. When the amount of condensate reaches a certain height, it is controlled by the solenoid valve V7 and discharged at the steam condensate outlet 19. The rear end of the discharge port 19 is connected to the booster discharge unit U8, which is used to assist in the discharge of condensed water when there is back pressure in the device discharge pipeline. The air pressure balance of the condensed water in and out is maintained by breathing with the atmosphere through the breathing port 18. The breathing pipeline is equipped with a sterilization grade filter to prevent external environmental pollution. The high liquid level of the steam condensed water is controlled by the liquid level gauge L4. When the L4 liquid level is reached, the condensed water is stopped from entering, and the discharge is opened to prevent overflow.

[0162] exist Fig.10In the second embodiment of the composition of the steam condensate volume detection and non-condensable gas volume detection unit, the steam condensate with qualified temperature first enters the non-condensable gas volume detector S8, and the non-condensable gas in the condensate is collected above the non-condensable gas volume detector S8, and the non-condensable gas volume is detected by the liquid level meter L2. When the amount of non-condensable gas reaches a certain height, the non-condensable gas is discharged into the steam condensate volume detector S6 through the control of the solenoid valve V6. The condensate without non-condensable gas flows downward, exits below the non-condensable gas volume detector S8, and enters the steam condensate volume detector S6 through the control of the solenoid valve V7, and the steam condensate volume is detected by the liquid level meter L3. The height between the solenoid valves V6 and V7 constitutes the overflow weir S7, and the height of the overflow weir S7 will be used for correction in the process of non-condensable gas volume detection. When the amount of condensate reaches a certain height, it is controlled by the solenoid valve V8 and discharged at the steam condensate outlet 19. The rear end of the discharge port 19 is connected to the booster discharge unit U8, which is used to assist in the discharge of condensed water when there is back pressure in the device discharge pipeline. The air pressure balance of the condensed water in and out is maintained by breathing with the atmosphere through the breathing port 18. The breathing pipeline is equipped with a sterilization grade filter to prevent external environmental pollution. The high liquid level of the steam condensed water is controlled by the liquid level gauge L4. When the L4 liquid level is reached, the condensed water is stopped from entering, and the discharge is opened to prevent overflow.

[0163] The amount of dry steam condensate contained in the steam during the stage time is measured by the steam condensate volume detector S6, combined with the saturated water content in the steam measured in the phase separation unit, and the steam dryness value is calculated using the logic control and calculation unit U9.

[0164] The steam condensate volume detector S6 and the non-condensable gas volume detector S8 are used to measure the steam condensate volume and the non-condensable gas content in the steam during the stage time, and the steam dryness value is calculated using the logic control and calculation unit U9.

[0165] 6. Pressurized discharge unit

[0166] The booster discharge unit consists of an electric diaphragm pump and a non-return valve. After the test is completed, the booster pump is turned on to assist in the discharge of condensate in the event of back pressure in the device discharge pipeline.

[0167] 7. Logic control, calculation, data storage and transmission and human-machine interface unit;

[0168] The logic control, calculation, data storage transmission and human-machine interface unit includes power supply module, PLC / single-chip microcomputer, protector, relay, input / output module, human-machine interface and recorder. PLC / single-chip microcomputer can collect the corresponding data signals for detecting steam samples, and perform corresponding stage control and logic calculation on superheat, dryness and non-condensable gas content according to the sample conditions corresponding to the data signals. The human-machine interface is used to display information such as system operation status, detection stage, calculation results, result curve, data authority management, etc. The recorder is used to record the detection results and system status corresponding to different time periods.

[0169] PLC adopts Siemens S71200 series, the specific model is: 6ES7212-1AE40-0XB0;

[0170] 8-channel AI input module, specific model: 6ES7 231-4HF32-0XB0;

[0171] 8-channel DO output module, specific model: 6ES7 222-1BF32-0XB0;

[0172] The human-machine interface uses Siemens 4" streamlined series panel KTP400 Basic, the specific model is: 6AV2 123-2DB03-0AX0;

[0173] The power module is Phoenix, the specific model is: UNO-PS / 1AC / 24DC / 240W.

[0174] 8. Phased logic control and calculation logic such as Figure 11-13 shown.

[0175] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pure steam quality detection device, characterized in that: It includes a pure steam sampling unit, a control unit, and a steam superheat detection unit, a steam condensation unit, a steam saturated water phase separation unit, a steam condensed water volume detection unit and a non-condensable gas volume detection unit connected to the control unit; The pure steam sampling unit comprises a pure steam sampling tube and a steam condensate water collecting tube; The pure steam sampling tube is an L-shaped structure, with a non-condensable gas detection interface provided on the upper part of the horizontal tube, a superheat detection interface provided at the concentric position of the elbow, and a dryness detection interface provided on the side wall of the vertical tube; the bottom of the vertical tube of the pure steam sampling tube is connected to the steam condensate water collecting pipe, and a steam trap is provided at the bottom of the steam condensate water collecting pipe; The superheat detection interface is connected to the steam superheat detection unit; The dryness detection interface is connected to the steam saturated water phase separation unit, and the dry steam outlet of the steam saturated water phase separation unit is connected to the steam condensation unit; the steam condensation unit is also connected to the non-condensable gas detection interface; a pressure sensor P1 is provided on the transmission pipeline between the steam condensation unit and the non-condensable gas detection interface; the pressure sensor P1 is connected to the control unit; The outlet of the steam condensation unit is connected to a steam condensation water volume detection unit and a non-condensable gas volume detection unit; The control unit is also connected to a host computer.

2. A pure steam quality detection device according to claim 1, characterized in that: The steam superheat detection unit includes a pure steam flow guide pipe, a flow limiting pipe, a shell, and a temperature sensor T1; the temperature sensor T1 is connected to the control unit; The current limiting tube is located in the shell, a steam outlet is provided at the lower part of the shell, and the current limiting tube is in the pure steam superheat detection cavity; the current limiting tube is installed on the superheat detection interface through a quick connector; One end of the pure steam flow guide pipe extends into the horizontal pipe of the pure steam sampling pipe and remains concentric therewith, and the other end is located in the current limiting pipe; the temperature sensor T1 is connected to the end of the housing away from the superheat detection interface through a quick connector, and the probe of the temperature sensor T1 extends into the pure steam superheat detection cavity; One end of the pure steam flow guide pipe located in the horizontal pipe of the pure steam sampling pipe is provided with a fixedly connected nozzle.

3. A pure steam quality detection device according to claim 1, characterized in that: The steam superheat detection unit includes a pure steam flow guide pipe, a flow limiting pipe, a shell, and a temperature sensor T1; the temperature sensor T1 is connected to the control unit; The current limiting tube is located in the shell, a steam outlet is provided at the lower part of the shell, and the current limiting tube is in the pure steam superheat detection cavity; the current limiting tube is installed on the superheat detection interface through a quick connector; One end of the pure steam flow guide pipe extends into the horizontal pipe of the pure steam sampling pipe and remains concentric therewith, and the other end is located in the current limiting pipe; the temperature sensor T1 is connected to the end of the housing away from the superheat detection interface through a quick connector, and the probe of the temperature sensor T1 extends into the pure steam superheat detection cavity; A detachably connected nozzle is provided between the flow limiting tube and the superheat detection interface.

4. A pure steam quality detection device according to claim 1, characterized in that: The steam saturated water phase separation unit includes a steam saturated water phase separation mechanism, a solenoid valve V1, a solenoid valve V2, and a fine-tuning valve V3; One end of the solenoid valve V1 is connected to the dryness detection interface through a quick connector, and the other end is connected to the steam phase separation mechanism; a liquid level gauge L1 is provided at the bottom of the steam phase separation mechanism for detecting the liquid level in the saturated water meter below the steam phase separation mechanism; The steam phase separation mechanism is provided with a dry steam outlet near the bottom; A saturated water discharge port is provided below the dry steam outlet, and the saturated water discharge port is connected to the solenoid valve V2 and the fine-tuning valve V3; The solenoid valve V1, the solenoid valve V2 and the liquid level meter L1 are all connected to the control unit.

5. A pure steam quality detection device according to claim 1, characterized in that: The steam condensation unit includes a steam condenser and a fine-tuning valve V5; The pure steam inlet of the steam condenser is connected to the dry steam outlet and the non-condensable gas detection interface, and the condensed water outlet of the steam condenser is connected to the fine-tuning valve V5; the steam condenser is also provided with a temperature sensor T2 and a temperature sensor T3; The cooling water outlet of the steam condenser is also provided with a solenoid valve V4 The temperature sensor T2, the temperature sensor T3, and the solenoid valve V4 are all connected to the control unit.

6. A pure steam quality detection device according to claim 5, characterized in that: The steam condenser adopts but is not limited to a coil heat exchanger, in which the steam exchanges heat with the cooling water in countercurrent.

7. A pure steam quality detection device according to claim 1, characterized in that: The steam condensate volume detection unit and the non-condensable gas volume detection unit are also connected to an electric diaphragm pump and a one-way valve.

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