CN117130404A - Gas sample temperature control system - Google Patents
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- CN117130404A CN117130404A CN202311083856.5A CN202311083856A CN117130404A CN 117130404 A CN117130404 A CN 117130404A CN 202311083856 A CN202311083856 A CN 202311083856A CN 117130404 A CN117130404 A CN 117130404A
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- 239000007789 gas Substances 0.000 claims abstract description 144
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000000498 cooling water Substances 0.000 claims abstract description 49
- 238000001816 cooling Methods 0.000 claims abstract description 39
- 239000002737 fuel gas Substances 0.000 claims abstract description 20
- 238000004458 analytical method Methods 0.000 claims abstract description 19
- 230000005856 abnormality Effects 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
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Abstract
The application relates to the technical field of sample gas component measurement and analysis, in particular to a gas sample temperature control system, which comprises: the sensor measures the temperature of the fuel gas; the water pump is communicated with a water-cooling annular cavity arranged in the sampling rake; the frequency converter is connected with the water pump; the bypass valve is arranged between the water pump and the water-cooling annular cavity; when the temperature measurement of the sensor is lower than the set value, firstly, the frequency converter reduces the frequency, the rotation speed of the water pump is reduced, then the opening of the bypass valve is increased, and the flow rate of cooling water is reduced; when the temperature measurement of the sensor is higher than the set value, firstly, the frequency converter increases the frequency, the rotation speed of the water pump is increased, then the opening of the bypass valve is reduced, and the flow rate of cooling water is increased; according to the application, the control of the cooling water flow and the gas temperature is realized by adjusting the rotation speed of the water pump and the linkage adjustment of the opening of the bypass valve through the frequency converter, the gas temperature can be adjusted more quickly, more stably and more accurately, and the control precision and the stability of the gas temperature can be improved.
Description
Technical Field
The application relates to the technical field of sample gas component measurement and analysis, in particular to a gas sample temperature control system.
Background
Aero-engines are known as "bright beads on industrial imperial crowns", which represents the state of technological development and comprehensive national force. With the continuous improvement of environmental awareness, civil aviation engines are developed towards low emission.
For emission of civil aircraft engine pollutants, the aviation environmental protection committee (Committee on Aviation Environmental Protection, CAEP) subordinate to the international civil aviation organization has set a series of emission standards since 1980. Wherein the specified pollutants mainly comprise soot, carbon monoxide (CO), unburned Hydrocarbons (UHC) and Nitrogen Oxides (NO) x ). From the CAEP/2 standard to the CAEP/8 standard, there is essentially NO change in the emission standards for soot, carbon monoxide and unburned hydrocarbons, but NO x Is more and more strict; NO specified in the CAEP/6 standard x The emission standard is reduced by 12% compared with the specified value of the CAEP/4 standard, and the NO specified by the CAEP/8 standard x Reduction of the emission standard from the specified value of CAEP/6 standard15% lower. The CAEP/10 standard, which was newly developed in 2016, was used for particulate matter (also known as ultrafine soot particles) and CO 2 The discharge amount of (2) is also newly regulated. The civil aviation engine must meet the pollution emission requirements of the international civil aviation organization (International Civil Aviation Organization, ICAO) if it is to be qualified for airworthiness.
Therefore, a reasonable-design gas analysis system is required, the accuracy of component concentration measurement is ensured from various links such as sampling, preprocessing, concentration measurement, data analysis and the like, and technical support is provided for the design research and development of a low-emission combustion chamber and the airworthiness evidence collection of a civil aircraft engine.
Under the high-temperature and high-pressure environment, the water-cooling sampling rake is generally adopted to take out the sample gas from the combustion chamber for component concentration measurement, the water-cooling structure ensures that the sampling rake is not ablated by the fuel gas on one hand, and the temperature of the sample gas is required to be kept at a relatively constant temperature on the other hand so as to ensure that the sample gas is taken out at a proper temperature and is analyzed and measured, and the accuracy of measuring the concentration of the fuel gas components is improved. If the temperature of the extracted sample gas is too high, chemical reaction in the sample gas cannot be frozen; if the temperature of the extracted sample is too low, UHC and nitrogen oxides can be condensed, and the concentration measurement result of the gas components can be greatly influenced. However, the temperature of the gas sample is difficult to meet the sampling requirements.
Disclosure of Invention
Therefore, the application aims to overcome the defect that the temperature of the gas sample is difficult to meet the sampling requirement.
In order to overcome the above-mentioned drawbacks, the present application provides a gas sample temperature control system, comprising:
the sensor is suitable for measuring the temperature of the gas sample gas obtained by the sampling rake;
the water pump is communicated with a water-cooling annular cavity arranged in the sampling rake through a pipeline and is suitable for providing cooling water for the water-cooling annular cavity;
the frequency converter is connected with the water pump;
the bypass valve is arranged between the water pump and the water-cooling annular cavity and is suitable for adjusting the flow of cooling water flowing into the water-cooling annular cavity;
the controller is in signal connection with the sensor, the frequency converter and the bypass valve; the controller is provided with a first state that when the temperature measured by the sensor is lower than a set temperature range, the controller firstly controls the frequency converter to reduce the frequency, then reduces the rotating speed of the water pump, and then controls the opening of the bypass valve to increase so as to reduce the flow rate of cooling water entering the water cooling ring cavity; and a second state that when the temperature measured by the sensor is higher than the set temperature range, the controller firstly controls the frequency converter to increase the frequency, so as to further increase the rotating speed of the water pump, and then controls the opening of the bypass valve to decrease so as to increase the flow of cooling water entering the water cooling annular cavity.
Optionally, the set temperature range is 150-180 ℃.
Optionally, a pressure transmitter is arranged on the connecting pipeline of the bypass valve and the water-cooling annular cavity; the pressure transmitter is in signal connection with the controller;
the pressure transmitter is adapted to signal the controller to display a pressure value and to perform an abnormality warning when the pressure of the cooling water in the pipeline exceeds a first threshold or is below a second threshold.
Optionally, a flowmeter is arranged on the connecting pipeline of the bypass valve and the water-cooling annular cavity; the flowmeter is in signal connection with the controller;
the flow meter is adapted to signal the controller to display the flow value and to perform an abnormality warning when the flow rate of the cooling water in the pipeline exceeds a third threshold or is lower than a fourth threshold.
Optionally, when the sampling rake is an independent sampling rake, a plurality of sampling pipes are arranged on the sampling rake, and the plurality of sampling pipes are suitable for introducing the fuel gas into the component concentration analysis system; and each sampling tube is internally provided with the sensor.
Optionally, when the sampling rake is a hybrid sampling rake, the sensor comprises: a first sensor and a second sensor;
a plurality of sampling pipes are arranged on the sampling rake, and sampling ports of the sampling pipes are suitable for introducing fuel gas;
the sampling pipes are communicated with a mixing cavity arranged in the sampling rake; the mixing cavity is communicated with a mixed sample gas eduction tube; the mixed sample gas eduction tube is connected with the component concentration analysis system through a sample gas conveying tube; the joint of the mixed sample gas eduction tube and the sample gas conveying tube is a sample gas outlet;
in a mixed sampling rake, the first sensor is disposed within the mixing chamber; the second sensor is arranged at a position close to the sample gas outlet in the mixed sample gas outlet pipe.
Optionally, the sampling port of the sampling tube is arranged opposite to the flowing direction of the fuel gas.
Optionally, a thermal insulation material is wrapped outside the mixed sample gas outlet pipe.
Optionally, an electric tracing structure is arranged on the sample gas conveying pipe; the electric tracing structure is connected with the controller and is suitable for keeping a set temperature range under the control of the controller.
Optionally, a pretreatment water tank is connected to the upstream of the water pump; the pre-treatment tank is adapted to provide filtered and softened cooling water.
Compared with the prior art, the technical scheme of the application has the following advantages:
1. the application provides a gas sample temperature control system, which comprises: the sensor is suitable for measuring the temperature of the gas sample gas obtained by the sampling rake; the water pump is communicated with a water-cooling annular cavity arranged in the sampling rake through a pipeline and is suitable for providing cooling water for the water-cooling annular cavity; the frequency converter is connected with the water pump; the bypass valve is arranged between the water pump and the water-cooling annular cavity and is suitable for adjusting the flow of cooling water flowing into the water-cooling annular cavity; the controller is in signal connection with the sensor, the frequency converter and the bypass valve; the controller is provided with a first state that when the temperature measured by the sensor is lower than a set temperature range, the controller firstly controls the frequency converter to reduce the frequency, then reduces the rotating speed of the water pump, and then controls the opening of the bypass valve to increase so as to reduce the flow rate of cooling water entering the water cooling ring cavity; when the temperature measured by the sensor is higher than the set temperature range, the controller firstly controls the frequency converter to increase the frequency so as to further increase the rotating speed of the water pump, and then controls the opening of the bypass valve to decrease so as to increase the second state of the flow of cooling water entering the water cooling annular cavity; according to the technical scheme, the control of the cooling water flow and the gas temperature is realized by adopting the frequency converter to adjust the linkage adjustment of the rotation speed of the water pump and the opening of the bypass valve, when the temperature difference between the actual gas temperature and the target temperature is large, the water flow is coarsely adjusted by increasing the rotation speed of the water pump, and when the temperature difference between the actual gas temperature and the target temperature is reduced, the water flow is finely adjusted by the opening of the bypass valve, so that the gas temperature can be adjusted more quickly, stably and accurately, the control precision and the stability of the gas temperature are improved, the gas temperature in the sampling process is ensured to meet the sampling requirement, and the data effectiveness of gas analysis can be effectively improved; the method has the advantages that the adjustment quantity of the rotation speed of the water pump and the opening of the bypass valve is automatically determined according to the difference value between the input value and the set value of the temperature signal, so that the cooling water flow and the gas sample gas temperature are controlled, the problems of large concentration structure difference of gas components or low data effectiveness and the like caused by manual operation can be reduced through the gas sample gas automatic temperature control system, and the reliability of test data is effectively improved; after the gas working condition is stable, the gas sample temperature is guaranteed to be quickly adjusted to a target value, so that the test duration is shortened, and the test cost is obviously reduced. And by arranging the water-cooling annular cavity, not only can the sampling rake be prevented from being ablated, but also chemical reaction in the gas sample can be frozen.
2. The temperature range set by the application is 150-180 ℃; by adopting the technical scheme, if the temperature of the extracted gas sample is too high, chemical reaction in the gas sample can not be frozen; if the temperature of the extracted gas sample is too low, UHC and nitrogen oxides can be condensed, and the concentration measurement result of the gas components can be greatly influenced. Therefore, in order to ensure that the gas sample is taken at a suitable temperature and is measured analytically and to improve the accuracy of the measurement of the concentration of the gas components, the temperature of the gas sample is kept between 150 and 180 ℃.
3. The application is provided with a pressure transmitter on the connecting pipeline of the bypass valve and the water-cooling annular cavity; the pressure transmitter is in signal connection with the controller; the pressure transmitter is suitable for signaling the controller to display the pressure value and perform abnormality alarming when the pressure of cooling water in the pipeline exceeds a first threshold or is lower than a second threshold; according to the technical scheme, the pressure transmitter is adopted to measure and monitor the pressure of the cooling water, the pressure signal of the cooling water is used as the signal input of the controller, and when the pressure of the cooling water suddenly increases or drops to an abnormal value, an alarm is triggered to perform intervention rapidly, so that ablation or damage of a sampling rake is avoided, and the service lives of the sampling rake and a downstream analysis instrument are prolonged.
4. The bypass valve and the water-cooling annular cavity connecting pipeline are provided with a flowmeter; the flowmeter is in signal connection with the controller; the flowmeter is suitable for signaling the controller to display the flow value and perform abnormality alarming when the flow of the cooling water in the pipeline exceeds a third threshold or is lower than a fourth threshold; according to the technical scheme, the flow of the cooling water is measured and monitored by adopting the flowmeter, the flow signal of the cooling water is used as the signal input of the controller, and when the flow of the cooling water suddenly increases or drops to an abnormal value, an alarm is triggered to perform intervention rapidly, so that ablation or damage of a sampling rake is avoided, and the service lives of the sampling rake and a downstream analysis instrument are prolonged.
5. When the sampling rake is an independent sampling rake, the sampling rake is provided with a plurality of sampling pipes which are suitable for introducing fuel gas into the component concentration analysis system; the sensor is arranged in each sampling tube; by adopting the technical scheme, the temperature is monitored in a multi-point way for independent sampling, and the flow of cooling water is controlled in real time, so that the temperature stability of the gas sample gas is ensured.
6. In the application, when the sampling rake is a mixed sampling rake, the sensor comprises: a first sensor and a second sensor; a plurality of sampling pipes are arranged on the sampling rake, and sampling ports of the sampling pipes are suitable for introducing fuel gas; the sampling pipes are communicated with a mixing cavity arranged in the sampling rake; the mixing cavity is communicated with a mixed sample gas eduction tube; the mixed sample gas eduction tube is connected with the component concentration analysis system through a sample gas conveying tube; the joint of the mixed sample gas eduction tube and the sample gas conveying tube is a sample gas outlet; the first sensor is arranged in the mixing cavity; the second sensor is arranged at a position close to the sample gas outlet in the mixed sample gas outlet pipe; by adopting the technical scheme, for the mixed sampling mode, the temperature is monitored at two positions, and the flow of cooling water is controlled in real time, so that the temperature stability of the gas sample gas is ensured.
7. The sampling port of the sampling tube is arranged opposite to the flowing direction of the fuel gas; by adopting the technical scheme, the application leads the gas sample gas to the sampling rake to the maximum extent.
8. The external part of the mixed sample gas eduction tube is wrapped with a heat insulation material; by adopting the technical scheme, the temperature stability of the gas sample gas is ensured, and the influence degree of the external environment on the gas sample gas temperature is reduced.
9. The application is provided with an electric tracing structure on the sample gas conveying pipe; the electric tracing structure is connected with the controller and is suitable for keeping a set temperature range under the control of the controller; by adopting the technical scheme, the temperature of the gas sample is stabilized within a set temperature range through the electric tracing structure.
10. The upstream of the water pump is connected with a pretreatment water tank; the pre-treatment tank is adapted to provide filtered and softened cooling water; by adopting the technical scheme, the application ensures that reliable cooling water is provided, and prevents pipelines from being blocked and influences the temperature control effect of the gas sample gas.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of the internal and external connection structures of a gas sample temperature control system according to an embodiment of the present application.
Reference numerals illustrate:
1. an exhaust section; 2. a fuel gas; 3. a sampling port; 4. a sampling rake; 5. a sampling tube; 6. a water-cooling annular cavity; 7. a mixing chamber; 8. a sample gas outlet; 9. a water inlet pipe; 10. a water outlet pipe; 11. a first sensor; 12. a second sensor; 13. a mixed sample gas eduction tube; 14. a sample gas transport tube; 15. a component concentration analysis system; 16. a controller; 17. a pressure transmitter; 18. a flow meter; 19. a bypass valve; 20. a frequency converter; 21. a water pump; 22. pretreating a water tank; 23. a gas exhaust system; 24. a sampling analysis system.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present application described below may be combined with each other as long as they do not collide with each other.
One embodiment of a gas-sample temperature control system as shown in FIG. 1, comprises: the sensor, the controller 16, the frequency converter 20, the water pump 21 and the bypass valve 19 are connected in sequence.
The sensor is adapted to measure the temperature of the gas sample obtained by the sampling rake 4. The water pump 21 is communicated with the water-cooling annular cavity 6 arranged in the sampling rake 4 through a pipeline, and the water pump 21 is suitable for providing cooling water for the water-cooling annular cavity 6; the bypass valve 19 (also called bypass valve) is arranged between the water pump 21 and the water-cooled annular chamber 6, the bypass valve 19 being adapted to regulate the flow of cooling water into the water-cooled annular chamber 6. The controller 16 is in signal connection with the sensor, the frequency converter 20 and the bypass valve 19; the controller 16 is provided with a first state that when the temperature measured by the sensor is lower than a set temperature range, the controller 16 firstly controls the frequency converter 20 to reduce the frequency and further reduce the rotating speed of the water pump 21, and then the controller 16 controls the opening of the bypass valve 19 to increase so as to reduce the flow of cooling water entering the water cooling annular cavity 6; and a second state in which when the temperature measured by the sensor is higher than the set temperature range, the controller 16 first controls the frequency converter 20 to raise the frequency, thereby raising the rotation speed of the water pump 21, and then the controller 16 controls the opening of the bypass valve 19 to decrease to increase the flow rate of the cooling water into the water-cooling ring cavity 6. Specifically, the set temperature range is 150-180 ℃.
Further, a pressure transmitter 17 is arranged on the connecting pipeline between the bypass valve 19 and the water-cooling annular cavity 6; the pressure transmitter 17 is in signal connection with the controller 16; the pressure transmitter 17 is adapted to signal the controller 16 that the controller 16 is displaying a pressure value and that an abnormality is to be alerted when the pressure of the cooling water in the line exceeds a first threshold or is below a second threshold. A flow meter 18 is arranged on the connecting pipeline between the bypass valve 19 and the water-cooling annular cavity 6; the flowmeter 18 is in signal connection with the controller 16; the flow meter 18 is adapted to signal the controller 16 that the flow meter 18 is signaling the controller 16 to display the flow value and to alarm for an anomaly when the flow of cooling water in the pipeline exceeds a third threshold or is below a fourth threshold. The first threshold, the second threshold, the third threshold and the fourth threshold are all empirical values. A pretreatment water tank 22 is connected to the upstream of the water pump 21; the pre-treatment tank 22 is adapted to provide filtered and softened cooling water.
When an independent sampling mode is adopted, the sampling rake 4 is an independent sampling rake, a plurality of sampling pipes 5 are arranged on the sampling rake 4, and the plurality of sampling pipes 5 are suitable for introducing the fuel gas 2 into the component concentration analysis system 15; the sensor is arranged in each sampling tube 5.
When the mixed sampling mode is adopted, the sampling rake 4 is a mixed sampling rake. The sensor includes: a first sensor 11 and a second sensor 12; a plurality of sampling pipes 5 (five in fig. 1) are arranged on the sampling rake 4, and sampling ports 3 of the sampling pipes 5 are suitable for introducing fuel gas 2; the sampling tubes 5 are communicated with a mixing cavity 7 arranged in the sampling rake 4; the mixing cavity 7 is communicated with a mixed sample gas eduction tube 13; the mixed sample gas eduction tube 13 is connected with a component concentration analysis system 15 through a sample gas conveying tube 14; the joint of the mixed sample gas eduction tube 13 and the sample gas conveying tube 14 is a sample gas outlet 8; the first sensor 11 is arranged in the mixing cavity 7; the second sensor 12 is disposed in the mixed sample gas outlet pipe 13 at a position close to the sample gas outlet 8. The temperature of the temperature measuring point of the second sensor 12 can be controlled between 150 ℃ and 180 ℃, and the temperature of the temperature measuring point of the first sensor 11 is slightly higher than the temperature of the temperature measuring point of the second sensor 12. The mixed sample gas outlet pipe 13 is wrapped with a heat insulating material. An electric tracing structure is arranged on the sample gas conveying pipe 14; the electrical tracing structure is connected to the controller 16, the electrical tracing structure being adapted to maintain a set temperature range under control of the controller 16. Specifically, the set temperature range is 150-180 ℃.
In the above two sampling modes, the sampling port 3 of the sampling tube 5 is arranged opposite to the flow direction of the fuel gas 2. The fuel gas 2 is provided by a fuel gas exhaust system 23, and the fuel gas 2 is high-temperature fuel gas; the gas exhaust system 23 consists of an exhaust section 1 and related accessories, and is connected with a gas turbine or a turbine component at the upstream side if the measurement and research of pollutant emission characteristics of the aero-engine or the ground gas turbine are carried out; if combustion chamber design development and pollutant emission characteristic test studies are conducted, the upstream can be directly connected with the combustion chamber components. The sampling rake 4 and the component concentration analysis system 15 belong to a sampling analysis system 24; the sample analysis system 24 is used for gas sample gas withdrawal and component concentration measurement. The sampling rake 4 is mounted on the exhaust section 1. The water cooling annular cavity 6 is connected with a water inlet pipe 9 and a water outlet pipe 10, and the water inlet pipe 9 is connected with a pressure transmitter 17.
The technical scheme of the application is not only suitable for measuring the concentration of the gas component of the aero-engine or the gas turbine, but also suitable for measuring the concentration of the sample gas component in the high-temperature environment of the places such as chemical industry and the like.
The main working process of the gas sample temperature control system is briefly described as follows: the high-temperature fuel gas in the exhaust section 1 enters the corresponding independent sampling tube 5 through the plurality of sampling ports 3 on the sampling rake 4, is uniformly mixed into mixed sample gas in the mixing cavity 7, and enters the component concentration analysis system 15 through the mixed sample gas outlet tube 13 and the sample gas conveying tube 14 so as to carry out component concentration and analysis and measurement of the fuel gas sample gas. The water pump 21 pressurizes the cooling water in the pretreatment water tank 22 and divides the water into two paths: a main path and a bypass path. The cooling water of main way gets into water-cooling ring chamber 6 through flowmeter 18 and pressure transmitter 17 from the inlet tube 9 of cooling water, and the heat transfer between the casing of sampling harrow 4 is protected sampling harrow 4 through with the sampling harrow 4 on the one hand to guarantee that sampling harrow 4 can not be ablated in high temperature gas, and on the other hand is used for freezing the chemical reaction in the gas sample gas through the heat transfer with independent sampling tube 5 cooling sample gas, thereby effectively improve the data validity of gas analysis. The bypassed cooling water passes through a bypass valve 19. The frequency of the frequency converter 20 and the opening of the bypass valve 19 are regulated by the controller 16 to control the flow of cooling water, so that the temperature of the gas sample is controlled to be within a required temperature range, and the temperature of the gas sample is measured and fed back by the first sensor 11 and the second sensor 12. When the temperature of the mixing cavity 7 is lower than the set temperature range, the temperature signal received by the controller 16 is lower than the set temperature range, at the moment, the controller 16 sends out a control signal to properly reduce the frequency of the frequency converter 20, and simultaneously increases the opening of the bypass valve 19 to reduce the flow rate of cooling water entering the water-cooling annular cavity 6, so that the temperature of the gas sample gas is reduced; when the temperature of the mixing chamber 7 is higher than the set temperature range, the temperature signal received by the controller 16 is higher than the set temperature range, at this time, the controller 16 sends out a control signal to properly increase the frequency of the frequency converter 20, and simultaneously reduces the opening of the bypass valve 19 to increase the flow rate of cooling water entering the water-cooling annular chamber 6, thereby increasing the temperature of the gas sample. In the process of gas sample gas regulation, the change amount of a coarse adjustment signal and the change amount of a fine adjustment signal are determined according to the difference value between the input value of a temperature signal and a set temperature range, so that the control precision and the stability of the gas sample gas temperature are improved, and the gas sample gas temperature can be quickly regulated to a target value after the gas working condition is stable.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present application.
Claims (10)
1. A gas sample temperature control system, comprising:
the sensor is suitable for measuring the temperature of the gas sample gas acquired by the sampling rake (4);
the water pump (21) is communicated with a water-cooling annular cavity (6) arranged in the sampling rake (4) through a pipeline, and the water pump (21) is suitable for providing cooling water for the water-cooling annular cavity (6);
the frequency converter (20) is connected with the water pump (21);
a bypass valve (19) arranged between the water pump (21) and the water-cooled annular cavity (6), the bypass valve (19) being adapted to regulate the flow of cooling water into the water-cooled annular cavity (6);
the controller (16) is in signal connection with the sensor, the frequency converter (20) and the bypass valve (19); the controller (16) is provided with a first state that when the temperature measured by the sensor is lower than a set temperature range, the controller (16) firstly controls the frequency converter (20) to reduce the frequency and further reduce the rotating speed of the water pump (21), and then the controller (16) controls the opening of the bypass valve (19) to be increased so as to reduce the flow rate of cooling water entering the water cooling annular cavity (6); and a second state in which the controller (16) first controls the frequency converter (20) to raise the frequency and thus the rotational speed of the water pump (21) when the temperature measured by the sensor is higher than the set temperature range, and the controller (16) then controls the opening of the bypass valve (19) to decrease to increase the flow rate of cooling water into the water-cooling annular cavity (6).
2. The gas sample temperature control system of claim 1, wherein the set temperature range is 150-180 ℃.
3. The gas sample temperature control system according to claim 1, wherein a pressure transmitter (17) is arranged on the connecting pipeline of the bypass valve (19) and the water-cooling annular cavity (6); the pressure transmitter (17) is in signal connection with the controller (16);
the pressure transmitter (17) is adapted to signal the controller (16) that the controller (16) is displaying a pressure value and that an abnormality is alerted when the pressure of the cooling water in the pipeline exceeds a first threshold or is below a second threshold.
4. The gas sample temperature control system according to claim 1, wherein a flow meter (18) is arranged on a connecting pipeline of the bypass valve (19) and the water-cooling annular cavity (6); the flowmeter (18) is in signal connection with the controller (16);
the flow meter (18) is adapted to signal the controller (16) that the flow meter (18) is displaying a flow value and an abnormality warning is performed by the controller (16) when the flow of cooling water in the pipeline exceeds a third threshold or is below a fourth threshold.
5. The gas sample temperature control system according to any one of claims 1-4, wherein when the sampling rake (4) is an independent sampling rake, a plurality of sampling pipes (5) are provided on the sampling rake (4), the plurality of sampling pipes (5) being adapted to introduce the gas (2) into the component concentration analysis system (15); the sensor is arranged in each sampling tube (5).
6. A gas sample temperature control system according to any one of claims 1-4, wherein when the sampling rake (4) is a hybrid sampling rake, the sensor comprises: a first sensor (11) and a second sensor (12);
a plurality of sampling pipes (5) are arranged on the sampling rake (4), and sampling ports (3) of the sampling pipes (5) are suitable for introducing fuel gas (2);
the sampling tubes (5) are communicated with a mixing cavity (7) arranged in the sampling rake (4); the mixing cavity (7) is communicated with a mixed sample gas eduction tube (13); the mixed sample gas eduction tube (13) is connected with the component concentration analysis system (15) through a sample gas conveying tube (14); the joint of the mixed sample gas eduction tube (13) and the sample gas conveying tube (14) is a sample gas outlet (8);
the first sensor (11) is arranged in the mixing cavity (7); the second sensor (12) is arranged at a position close to the sample gas outlet (8) in the mixed sample gas outlet pipe (13).
7. The gas sample temperature control system according to claim 6, wherein the sampling port (3) of the sampling tube (5) is arranged opposite to the flow direction of the gas (2).
8. The gas sample temperature control system according to claim 6, wherein a thermal insulation material is wrapped outside the mixed sample gas outlet pipe (13).
9. The gas sample temperature control system according to claim 6, wherein an electric tracing structure is provided on the sample gas transport pipe (14); the electric tracing structure is connected with the controller (16), and is suitable for keeping a set temperature range under the control of the controller (16).
10. The gas-sample temperature control system according to any one of claims 1-4, characterized in that a pre-treatment tank (22) is connected upstream of the water pump (21); the pre-treatment tank (22) is adapted to provide filtered and softened cooling water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311083856.5A CN117130404A (en) | 2023-08-25 | 2023-08-25 | Gas sample temperature control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311083856.5A CN117130404A (en) | 2023-08-25 | 2023-08-25 | Gas sample temperature control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117130404A true CN117130404A (en) | 2023-11-28 |
Family
ID=88859375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311083856.5A Pending CN117130404A (en) | 2023-08-25 | 2023-08-25 | Gas sample temperature control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117130404A (en) |
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2023
- 2023-08-25 CN CN202311083856.5A patent/CN117130404A/en active Pending
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