Miniaturized comparison test detection equipment

Abstract

The utility model provides a miniaturized comparison test detection device, which not only can ensure the measurement accuracy, but also is beneficial to overall miniaturization and portability, and is low in maintenance cost. Comprising a flue gas sampler and a gas analyzer, a pre-filter, a heating probe rod, a heating chamber and a condenser which are sequentially connected are integrated in the flue gas sampler, a secondary filter is arranged at an outlet position in the heating chamber, a water outlet of the condenser is connected with a peristaltic pump, the condenser adopts a three-stage semiconductor chilling plate condenser, and the gas analyzer is connected with the secondary filter. An exhaust port of the condenser is connected with a sampling pump connected with the gas analyzer, and a heat preservation layer is arranged on the outer wall of the condenser.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, specifically a miniaturized comparison testing device. Background Technology

[0002] With the continuous development and upgrading of environmental online monitoring systems, the requirements for the equipment and personnel of third-party testing companies are also increasing. In addition to obtaining relevant industry qualifications, third-party testing companies must also establish good social credibility. Good social credibility is based on advanced testing technology, high-performance testing equipment, and highly qualified testing personnel. High-performance testing equipment plays a decisive role in the third-party testing comparison process. Therefore, the comparison testing equipment must be more accurate, reliable, and convenient.

[0003] Commonly used comparative testing equipment consists of a flue gas sampler, heated pipeline, condenser, sampling pump, filter, and gas analyzer. The testing process involves the operator first connecting all components sequentially, then powering on the gas analyzer for preheating, checking the pipeline's airtightness, measuring the sampler's heating temperature, and measuring the condenser's cooling temperature. After meeting the measurement conditions, the sampler is positioned at the optimal measurement location in the flue. Finally, the equipment is started for actual measurement, and relevant data is recorded. However, in this testing process, the temperatures of the heated pipeline and condenser are independently controlled. The long transmission pipelines can lead to leaks at joints, and the long heating pipelines increase the power consumption of the sampling pump and the entire testing equipment. Furthermore, the working platforms at most flue gas online monitoring sites are currently quite small. Therefore, without affecting measurement performance, it is necessary to miniaturize traditional comparative testing equipment. To this end, a small and convenient comparative testing system has been proposed, which consists of a flue gas sampler, a non-heated sampling pipeline, and a portable analyzer. The filter and sampling pump are integrated into the portable analyzer. Although this solution eliminates the need for a heat tracing pipeline, other components are still retained. Integrating the filter and sampling pump into the portable analyzer makes the comparative testing system more convenient and miniaturized. However, problems still exist: due to the lack of a heat tracing pipeline, condensate can easily damage the filter element after extracting flue gas with high humidity, leading to lower measured concentrations of some gases. In addition, integrating the filter and sampling pump into the portable analyzer makes the portable analyzer expensive and increases maintenance costs. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a miniaturized comparison testing and detection device that not only ensures measurement accuracy but also facilitates overall miniaturization and portability, resulting in low maintenance costs.

[0005] This utility model adopts the following technical solution: a miniaturized comparative testing and detection device, including a flue gas sampler and a gas analyzer. The flue gas sampler integrates a pre-filter, a heating probe, a heating chamber, and a condenser connected in sequence. A secondary filter is provided at the outlet of the heating chamber. A peristaltic pump is connected to the outlet of the condenser. The condenser adopts a three-stage semiconductor refrigeration condenser. The exhaust port of the condenser is connected to a sampling pump connected to the gas analyzer. The outer wall of the condenser is provided with a heat insulation layer.

[0006] Furthermore, the air inlet of the heating chamber is connected to a calibration solenoid valve, through which standard gas enters the heating chamber;

[0007] Furthermore, a backflush three-way solenoid valve is connected to the pipeline connecting the heating chamber and the condenser, and compressed air is connected to the backflush three-way solenoid valve.

[0008] Furthermore, temperature sensors are installed in the heating probe, heating chamber, and condenser.

[0009] Furthermore, the secondary filter is a ceramic filter;

[0010] Furthermore, the inner cavity of the condenser is made of 316 stainless steel and is coated with a Teflon coating.

[0011] The beneficial effects of this utility model are that it does not use heat tracing pipelines, and the flue gas sampler is matched with the corresponding gas analyzer. The condenser is integrated into the flue gas sampler, which makes the overall structure of the detection equipment smaller and more integrated, and the maintenance cost is low. This not only ensures the accuracy of measurement, but also makes it easy to carry and maintain. It can be used stably for a long time under various complex working conditions and has good economic value. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the flue gas sampler in this utility model. Detailed Implementation

[0013] like Figure 1 As shown, this utility model discloses a miniaturized comparative testing and detection device, which includes a flue gas sampler and a gas analyzer (not shown in the figure) connected together. The flue gas sampler integrates a pre-filter 1, a heating probe 2, a heating chamber 3, and a condenser 5 connected in sequence. A secondary filter 4 is provided at the outlet of the heating chamber 3. A peristaltic pump 6 is connected to the outlet of the condenser 5. The condenser 5 uses a three-stage semiconductor cooling chip condenser, which reduces the weight and volume by 3 / 4 compared to the traditional mechanical compressor condenser. The exhaust port 10 of the condenser 5 is connected to a sampling pump (not shown in the figure) connected to the gas analyzer. The outer wall of the condenser 5 is provided with a heat insulation layer 9.

[0014] The air inlet of the heating chamber 3 is connected to a calibration solenoid valve 7, through which standard air enters the heating chamber 3; a backflush three-way solenoid valve 8 is connected to the pipeline connecting the heating chamber 3 and the condenser 5, and compressed air is connected to the backflush three-way solenoid valve 8.

[0015] Temperature sensors (not shown in the figure) are installed in the heating probe 2, heating chamber 3, and condenser 5; the secondary filter 4 is a ceramic filter; the inner cavity of the condenser 5 is made of 316 stainless steel and is coated with Teflon.

[0016] In this invention, the flue gas sampler has been upgraded for integration and portability, making the overall comparative testing and detection equipment smaller and more integrated, and easier to disassemble and maintain. This reduces manufacturing costs and shortens the production cycle. The pre-positioned heating probe 2 and the two-stage precision filtration, along with continuous heating, reduce the possibility of pipe blockage. The three-stage semiconductor refrigeration system can adapt to high flue gas temperatures and continue operating even under abnormal conditions where one stage of refrigeration fails, ensuring the continuity of comparative measurements and increasing the reliability of the entire comparative testing and detection equipment. Furthermore, this invention adds backflushing and calibration functions to prevent high-concentration dust from clogging the gas path, making the equipment measurements more accurate and reliable.

[0017] The specific working principle is as follows: the heating probe 2 and heating chamber 3 are heated to a temperature of over 120°C, the condenser 5 cools simultaneously, and the peristaltic pump 6 drains the condensate. There are temperature sensors inside the heating probe 2, heating chamber 3, and condenser 5. When the temperature detected by the temperature sensor reaches the required measurement value, the sampling pump starts to draw flue gas. The flue gas drawn from the sampling pump is sent to the flue gas analyzer for analysis. Once the temperature at the measuring point exceeds the required measurement value, a corresponding alarm signal can be issued by setting the appropriate alarm.

[0018] In addition to the measurement states mentioned above, the flue gas sampler also has a calibration state and a backflushing state;

[0019] When the flue gas sampler is in calibration mode, the operator opens the calibration solenoid valve 7 and introduces standard gas of the corresponding concentration until the flue gas analyzer value stabilizes before calibration, thus ensuring the accuracy of the equipment measurement.

[0020] When the flue gas sampler is in backflushing mode, the operator opens the backflushing air three-way solenoid valve 8 to introduce compressed air at about 0.4MPa. At this time, the air path connected to the condenser 5 is closed, and the secondary filter 4, heating probe 2 and pre-filter 1 are backflushed, thereby avoiding air path blockage that could affect the accuracy of the measurement and the extraction flow rate.

[0021] In summary, this utility model combines a flue gas sampler with pretreatment capabilities with a corresponding gas analyzer, resulting in accurate measurements, ease of portability and maintenance, and long-term stable operation under various complex working conditions.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A miniaturized comparative testing and detection device, comprising a flue gas sampler and a gas analyzer, characterized in that: The flue gas sampler integrates a pre-filter, a heating probe, a heating chamber, and a condenser connected in sequence. A secondary filter is installed at the outlet of the heating chamber. A peristaltic pump is connected to the outlet of the condenser. The condenser is a three-stage semiconductor refrigeration condenser. The exhaust port of the condenser is connected to a sampling pump connected to the gas analyzer. The outer wall of the condenser is provided with a heat insulation layer.

2. The miniaturized comparison testing and detection device according to claim 1, characterized in that: The air inlet of the heating chamber is connected to a calibration solenoid valve, through which standard gas enters the heating chamber.

3. The miniaturized comparison testing and detection device according to claim 1, characterized in that: A backflush three-way solenoid valve is connected to the pipeline connecting the heating chamber and the condenser, and compressed air is connected to the backflush three-way solenoid valve.

4. The miniaturized comparison testing and detection device according to claim 1, characterized in that: Temperature sensors are installed in the heating probe, heating chamber, and condenser.

5. The miniaturized comparison testing and detection device according to claim 1, characterized in that: The secondary filter is a ceramic filter.

6. The miniaturized comparison testing and detection device according to claim 1, characterized in that: The inner cavity of the condenser is made of 316 stainless steel and is coated with Teflon.

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