The hottest PM25 monitor in China, made in Shijiaz

China's first PM2.5 monitor made in Shijiazhuang

nowadays, PM2.5 monitoring has become a hot topic. Seven districts and cities in Hebei Province, including Shijiazhuang, have released PM2.5 research data since June 1. But did you know that China's first self-produced air quality monitor that can monitor PM10, PM2.5 and other particles was born in Shijiazhuang, Hebei Province

it is understood that the manufacturer is Hebei Xianhe Environmental Protection Technology Co., Ltd. (hereinafter referred to as Xianhe environmental protection), located in Shijiazhuang Development Zone. The domestic monitor integrates many domestic patented technologies first developed in the industry. The company is the first enterprise to pass the national certification of PM2.5 key technology cutter after the promulgation of national standards for measuring PM10 and PM2.5. The instrument that has been monitoring PM10 particles before can monitor PM2.5 value after equipped with PM2.5 cutter. Therefore, it can be said that it is the first enterprise in China to develop PM2.5 monitoring instruments

previously, domestic PM2.5 monitoring equipment was monopolized by foreign enterprises. The localization of PM2.5 monitor will reduce the cost of PM2.5 monitoring, facilitate the encryption of monitoring points, and make the monitoring data more timely and accurate. Up to now, the particulate matter monitoring instruments made in Shijiazhuang have been distributed in 1000 domestic air quality monitoring sub stations in Beijing, Shanghai, Shanxi, Hebei, Shandong, etc

get the latest news before publishing. Pioneer environmental protection has been listed in the list of recommended suppliers of national PM2.5 by the Ministry of finance

particles pass through the chimney cover (air sampling pump) and are transmitted to the microwave oven through the sampling tube. Yesterday (June 10), Hebei Xianhe Environmental Protection Technology Co., Ltd. (hereinafter referred to as Xianhe environmental protection), the first domestic PM2.5 monitor, went into his mother's home to explore the domestic PM2.5 monitor. When explaining the monitoring process, the R & D Engineer revealed that the experimental results obtained by domestic PM2.5 monitors with samples of different sizes and shapes can not be compared with each other, which is no worse than foreign products, and the pollution source can be found through the obtained PM2.5 data

the secret of chimney cover and microwave oven

I saw its self-developed PM2.5 automatic monitor in Xianhe environmental protection. The open-air part of the instrument looks like a chimney cover (scientific name: air sampling pump), on which is hung an air humidity bottle and a thin tube (scientific name: sampling tube), which are fixed with a tripod; The thin pipe pierced the roof and connected to a microwave oven (scientific name: numerical control monitoring display) indoors. The blue display screen on the surface of the microwave oven shows the current working conditions, air flow, sampling temperature, atmospheric pressure value, working condition concentration and standard condition concentration. Open the microwave oven, which is composed of simple parts such as filter paper tape made of glass fiber

Xianhe environmental protection R & D Engineer introduced the workflow of this PM2.5 automatic monitor with multiple patented technologies. After the flowing air passes through the cutter embedded in the chimney cover, PM2.5 particles are sucked into the sampling tube, and then discharged through the filter membrane in the microwave oven. PM2.5 and other small particles precipitate on the filter membrane and are irradiated with rays. The rays passing through the small particles will inevitably decay. Through the determination of attenuation, the concentration of particles can be calculated

the shadow of the irradiated particles will be printed on the filter tape, producing a black or gray circle every hour. The engineer said that the lighter the color of the circle, the less the content of PM2.5, and vice versa

pollution sources can be checked through monitoring data

this automatic monitor can be combined into a more powerful system like transformers, which adopts free circulation market capitalization weighting. It can be connected with software analysis system or other instruments. With the help of pollution diffusion, prediction and other models, it can analyze the monitoring data and then find out the source of pollution

this automatic monitor can be combined into a more powerful system like transformers. It can be connected with software analysis system or other instruments. With the help of pollution diffusion, prediction and other models, it can analyze the monitoring data and then find out the source of pollution

liuguoyun, assistant president of Xianhe environmental protection, introduced that particulate pollution such as PM2.5 in ambient air particles can be controlled from the source, and the prevention and Control Countermeasures of air composite pollutants can be provided to the regulatory authorities according to the data model analysis

Liu Guoyun told that monitoring PM2.5 is only a means. The key is to call on the whole society to take action to curb air pollution through monitoring, and to control pollution at the source by promoting the treatment of polluting enterprises

domestic monitors are not inferior to foreign ones

at present, domestic enterprises that produce and develop PM2.5 monitoring instruments mostly adopt four monitoring methods, namely infrared light scattering method for on-site monitoring and infrared light scattering method for monitoring. Therefore, the correct operation of plastic machinery (including plastic granulator, single screw granulator, waste plastic granulator, etc.) has the application of extended life measurement, ray method, sampling and weighing method

at present, domestic enterprises that produce and develop PM2.5 monitoring instruments mostly adopt four monitoring methods, namely infrared light scattering method on-site monitoring, infrared light scattering method monitoring, ray method, sampling and weighing method

in terms of monitoring accuracy, it is not easy to comment on which method is more accurate. Xianhe environmental protection R & D engineer told that only from the perspective of application field, infrared light scattering method is applicable to small handheld monitoring equipment; Sampling weighing method is suitable for air sampling; The application scope of ray method should be wider

the engineer also introduced that although the monitoring of PM2.5 in foreign countries was earlier than that in China, the research and development of its monitoring equipment was also earlier than that in China. However, through long-term comparative test research, it is found that there is no difference between the actual monitoring results of domestic monitors and imported products, and Shijiazhuang made products are not inferior to foreign products

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the clustering of monitoring points in schools and parks will not lead to the inaccuracy of PM2.5 data

since the PM2.5 monitoring data have been published throughout the country, the topic of monitoring site setting has attracted widespread attention. Some people questioned that some monitoring points clustered in schools, parks and other too green and too ecological areas, which affected the actual data and was not objective enough. In this regard, relevant people of pioneer environmental protection put forward their views in an interview yesterday

the areas near primary and secondary schools and parks are densely populated areas, and children, teenagers and the elderly are pollutant sensitive groups. The distribution of spots in such areas meets the requirements of the specification. Tianhe environmental protection R & D engineer said that the concentration of inhalable particles near schools and parks is not lower than that in other areas. The air is circulating. There are many materials tested by hardness tester for pollutants released by various emission sources such as traffic trunk roads. With the diffusion of air, mixing and superposition occur in a certain area nearby, affecting the air quality of parks and schools. Such monitoring points that look too green and too ecological can represent the results of the comprehensive impact of various nearby emission sources, and there is no problem of inaccurate data