Integrated portable flue gas measuring device

Abstract

The utility model relates to the technical field of flue gas measurement, and discloses an integrated portable flue gas measuring device which comprises a sampling pipe, the inside of the sampling pipe is communicated with a moisture content sensor through a first three-way connector, and one end of the moisture content sensor and one end of the first three-way connector are communicated with the same first electromagnetic valve; the portable sampling device is compact in structural design, the size of the device is greatly reduced, the weight is light, and an operator can conveniently carry the portable sampling device to various sampling platforms, especially sampling points which are difficult to approach, such as high altitude, so that the working efficiency is improved, and the safety risk of the operator is also reduced; the device integrates various measurement functions, and can realize detection of various components in flue gas and parameters such as flue gas temperature, flue gas humidity and flue gas flow velocity through single equipment, so that the number of equipment required to be carried for field detection is greatly reduced, the tedious process of multiple sampling and data integration is avoided, and the detection efficiency is improved. And the detection efficiency and the data accuracy are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas measurement, in particular to an integrated portable flue gas measuring device. Background Art

[0002] The flue gas generated by thermal power plants, steel mills and other factories is discharged through flues. In order to meet environmental protection requirements, the state stipulates that the discharged flue gas needs to be tested.

[0003] Before being discharged, the flue gas must undergo one or more treatment processes, such as desulfurization and dust removal, in accordance with relevant national regulations. The treated flue gas significantly reduces its environmental pollution.

[0004] Flue gas testing generally includes flue gas testing before treatment, testing before discharge after treatment, and testing after certain steps in the treatment process.

[0005] Factories typically have fixed online equipment for continuous flue gas composition monitoring and recording. However, portable flue gas measurement devices may still be required in some situations, including but not limited to the following. These include situations where national authorities or third-party testing companies conduct on-site flue gas testing, or where fixed online equipment is regularly used for data comparison and verification.

[0006] Existing portable flue gas measurement devices have the following problems: the measurement principles of some devices cannot adapt to the flue gas conditions after the current factory renovation; the devices are too large and bulky, making them inconvenient to use on high-altitude sampling platforms; the devices have a single function, and multiple devices need to be carried to the detection site and multiple samplings are required to obtain the required complete data; using multiple devices to sample each parameter separately takes a long time and a complicated process, with high requirements on the sampling site environment and a cumbersome subsequent data integration process. Utility Model Content

[0007] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an integrated portable flue gas measuring device, which effectively solves the problems raised in the above background.

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an integrated portable flue gas measuring device, comprising a sampling tube, wherein the interior of the sampling tube is connected to a moisture content sensor via a first three-way connector, the moisture content sensor and one end of the first three-way connector are both connected to the same first solenoid valve, one end of the first solenoid valve is connected to a condensation and dehydration unit, one end of the condensation and dehydration unit is connected to an air pump, one end of the air pump is connected to a flow meter, one end of the flow meter is connected to a second solenoid valve, and one end of the second solenoid valve is connected to a flue gas component detection unit.

[0009] Preferably, it also includes a flue gas flow rate measuring unit for measuring flow rate and a flue gas temperature measuring unit for measuring temperature.

[0010] Preferably, the flue gas flow rate measurement unit is provided with a differential pressure sensor zeroing module, which includes a full-pressure pitot tube and a differential pressure pitot tube. The full-pressure pitot tube is connected to a third solenoid valve and a differential pressure sensor through a second three-way connector. One end of the differential pressure pitot tube is connected to the third solenoid valve, and one end of the third solenoid valve is connected to the differential pressure sensor.

[0011] Preferably, the condensation and water removal unit consists of a semiconductor refrigeration module, a condensation water collection module and an automatic drainage module.

[0012] Preferably, the flue gas composition measuring unit is composed of two completely independent gas paths, one of which is connected to an electrochemical sensor.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The integrated portable flue gas measuring device of this utility model has a compact structure, which greatly reduces the size of the device and makes it lightweight. It is convenient for operators to carry it to various sampling platforms, especially difficult-to-access sampling points such as high altitudes. This not only improves work efficiency but also reduces the safety risks of operators.

[0015] 2. This new type integrates multiple measurement functions. Through a single device, it can detect various components in the flue gas and parameters such as flue gas temperature, flue gas humidity, and flue gas flow rate. This feature greatly reduces the number of devices required for on-site testing, avoids the tedious process of multiple sampling and data integration, and improves detection efficiency and data accuracy.

[0016] 3. This new type uses advanced measurement principles and technologies, which can adapt to the flue gas conditions of different factories after transformation, ensuring the accuracy and reliability of measurement. At the same time, this device also has the advantages of simple operation and easy maintenance, making on-site detection more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0018] In the attached figure:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the connection structure of the moisture content sensor of the utility model;

[0021] Figure 3 This is a schematic diagram of the connection structure of the condensation and water removal unit of the utility model;

[0022] Figure 4 This is a schematic diagram of the connection structure of the smoke component detection unit of the utility model;

[0023] Figure 5 This is a structural diagram of the zero calibration module of the differential pressure sensor of the utility model;

[0024] In the figure: 1. Sampling tube; 2. First three-way connector; 3. Moisture content sensor; 4. First solenoid valve; 5. Condensation removal unit; 6. Air pump; 7. Flow meter; 8. Second solenoid valve; 9. Flue gas composition detection unit; 10. Differential pressure sensor zeroing module; 101. Full-pressure pitot tube; 102. Differential pressure pitot tube; 103. Second three-way connector; 104. Third solenoid valve; 105. Differential pressure sensor. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Embodiment 1, by Figure 1-Figure 5 The utility model includes a sampling tube 1, the interior of the sampling tube 1 is connected to a moisture content sensor 3 through a first three-way connector 2, the moisture content sensor 3 and one end of the first three-way connector 2 are both connected to the same first solenoid valve 4, one end of the first solenoid valve 4 is connected to a condensation removal unit 5, one end of the condensation removal unit 5 is connected to an air pump 6, one end of the air pump 6 is connected to a flow meter 7, one end of the flow meter 7 is connected to a second solenoid valve 8, and one end of the second solenoid valve 8 is connected to a smoke component detection unit 9;

[0027] During the sampling process, the flue gas enters the device from the sampling tube 1. The sampling tube 1 is heated throughout the entire process to prevent the flue gas from condensing in the sampling tube 1 due to temperature drop. On the one hand, the accuracy of the flue gas humidity measurement is improved, and on the other hand, the condensed water is prevented from affecting the life of the resistance-capacitance moisture content sensor 3. At the same time, the device can realize software control to connect the sensor to the gas path or separate it from the gas path through the first solenoid valve 4 and a specific gas path connection method (such as Figure 2 When humidity measurement is not required, the sensor is separated from the gas path to maximize the service life of the sensor;

[0028] It also includes a flue gas flow rate measuring unit for measuring flow rate and a flue gas temperature measuring unit for measuring temperature;

[0029] The flue gas flow rate measurement unit is provided with a differential pressure sensor zeroing module 10, which includes a full-pressure pitot tube 101 and a differential pressure pitot tube 102. The full-pressure pitot tube 101 is connected to a third solenoid valve 104 and a differential pressure sensor 105 via a second three-way connector 103. One end of the differential pressure pitot tube 102 is connected to the third solenoid valve 104, and one end of the third solenoid valve 104 is connected to the differential pressure sensor 105.

[0030] The flue gas flow rate measurement unit integrates a differential pressure sensor zeroing module 10 (such as Figure 5 As shown), through the action of the third solenoid valve 104, the gas paths at both ends of the differential pressure sensor 105 are physically connected when the differential pressure is zeroed, so that the sensor can be automatically zeroed at any time point under various working conditions without the need for the equipment operator to perform any additional operations, further improving the accuracy and repeatability of the data;

[0031] The condensation and water removal unit 5 is composed of a semiconductor refrigeration module, a condensation water collection module and an automatic drainage module;

[0032] A high-power condensation and water removal unit 5 (such as Figure 3 As shown), this ensures the dryness of the gas in the subsequent gas path and prevents condensed water from affecting the life of the back-end equipment and the measurement accuracy. The condensation and water removal unit 5 consists of a semiconductor refrigeration module, a condensed water collection module and an automatic drainage module. The semiconductor refrigeration module reduces the saturated water vapor pressure of the gas by lowering the gas temperature in the gas path to achieve the purpose of converting the gaseous water in the air into liquid water. At the same time, the condensed water collection module collects and stores the condensed water generated in the previous step. The automatic drainage module detects the current water level in the collection module and automatically drains the water through the drainage interface when the water level reaches the threshold, ensuring the continuous and stable operation of the system;

[0033] The smoke composition measurement unit 9 consists of two completely independent gas paths, one of which is connected to an electrochemical sensor;

[0034] In this device, the gas to be tested is treated with water removal and then flows through the air pump 6 and the flow meter 7 and enters the smoke component detection unit 9 (such as Figure 4 As shown), the flue gas composition measurement unit 9 in this unit is composed of two completely independent gas circuits, which are switched by the second solenoid valve 8 and controlled by software. It also supports functions such as automatic gas circuit cleaning after the flue gas measurement is completed. The independent gas circuit structure ensures that when the flue gas composition data is not needed, the electrochemical sensor part is completely separated from the overall gas circuit, thereby minimizing the life loss of the sensor. At the same time, during use, it allows the functional module to be accessed through the software, thereby increasing the flexibility during on-site use and reducing the operating steps of on-site staff.

[0035] Working principle: During the sampling process, after the preheating is completed, the on-site operator inserts the sampling tube 1 into the flue, and the flue gas temperature measuring unit and the flue gas flow rate measuring unit in the device obtain the flue gas temperature and flue gas flow rate data. At the same time, the flue gas enters from the sampling tube 1 after preliminary filtration, passes through the moisture content sensor 3, and obtains the volume percentage of the flue gas moisture content. After further processing through the condensation and dehydration unit 5, air pump 6, flow meter 7, and second solenoid valve 8, it enters the flue gas composition measurement unit 9. The flue gas composition measurement unit 9 uses an electrochemical sensor to analyze the flue gas composition to obtain the content information of each component in the flue gas and then discharges the flue gas into the atmosphere. The equipment automatically integrates the data and stores them in the device's own storage after processing. The sampling process ends here.

[0036] This device integrates various working condition measurement units and flue gas measurement units, greatly reducing the number of devices required at the sampling site, reducing the complexity of on-site operations, and shortening the required sampling time. At the same time, each functional unit within the device remains independent, and the corresponding sensor module can be separated from the gas path under software control. This allows operators to flexibly configure the currently connected functional units while meeting the requirements of simultaneous multi-parameter measurement, reducing the loss of sensor life. This not only solves the problem of a large number of single-function devices on site and cumbersome operation, but also solves the problem of synchronous loss of sensor life in single-item measurements under highly integrated conditions.

Claims

1. An integrated portable smoke measuring device, comprising a sampling tube (1), characterized in that: The interior of the sampling tube (1) is connected to a moisture content sensor (3) via a first three-way connector (2); one end of the moisture content sensor (3) and the first three-way connector (2) are both connected to a first electromagnetic valve (4); one end of the first electromagnetic valve (4) is connected to a condensation dewatering unit (5); one end of the condensation dewatering unit (5) is connected to an air pump (6); one end of the air pump (6) is connected to a flow meter (7); one end of the flow meter (7) is connected to a second electromagnetic valve (8); and one end of the second electromagnetic valve (8) is connected to a smoke component detection unit (9).

2. The integrated portable smoke measuring device according to claim 1, characterized in that: It also includes a flue gas flow rate measuring unit for measuring flow rate and a flue gas temperature measuring unit for measuring temperature.

3. The integrated portable smoke measuring device according to claim 2, characterized in that: The flue gas flow rate measurement unit is provided with a differential pressure sensor zeroing module (10), the differential pressure sensor zeroing module (10) comprising a full-pressure pitot tube (101) and a differential pressure pitot tube (102), the full-pressure pitot tube (101) being connected to a third solenoid valve (104) and a differential pressure sensor (105) via a second three-way connector (103), one end of the differential pressure pitot tube (102) being connected to the third solenoid valve (104), and one end of the third solenoid valve (104) being connected to the differential pressure sensor (105).

4. The integrated portable smoke measuring device according to claim 1, characterized in that: The condensation and water removal unit (5) consists of a semiconductor refrigeration module, a condensation water collection module and an automatic drainage module.

5. The integrated portable smoke measuring device according to claim 1, characterized in that: The flue gas component measuring unit (9) is composed of two completely independent gas paths, one of which is connected to an electrochemical sensor.

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