Shun Net - Ji'nan times author:
near the beginning of school, city, Huaiyin District will be a district of primary and secondary schools, kindergartens to install the good news of the air purification system has become a focus of attention. Parents are expecting the children's classroom to install the air purification system on the tall building earlier. The reporter learned from the Municipal Bureau of education that the air purification system in the classroom is currently being investigated and investigated, and 8 of the 8 schools in the region have entered the pilot stage, providing the corresponding demonstration data for the implementation of the scheme.
last December, the teacher and parents had a headache from the heavy pollution weather, but it was not a good solution to stop the haze by stopping the class only by stopping the class. The City Central District and Huaiyin District proposed the installation of air purification facilities for primary and secondary schools and kindergartens. Recently, the reporter learned from the Central District of the city, according to the preliminary exploration, the area is expected to invest 33 million yuan for the 1650 classrooms and the teacher's office to install air purification system.
the whole area school installation air purification system is not as simple as buying an air purifier at home. Because there is no air quality.Amp in the classroom, lsquo national standard.Amp, rsquo, and the experience that no other cities have been successfully installed at present, the air cleaners and the new wind system on the market are different. The purification facilities are most suitable for use in classrooms. We need to do a lot of data demonstration before installation. Dou Fenglei, a member of the CPC Central Committee of Education Bureau, for example, many experimental data of air purification system are carried out in a closed environment. In the actual classroom, the primary school students are 40 minutes, 45 minutes for junior high school students, students need to go to the bathroom, to the teacher's office, and so on. Students can not get into the classroom at all, and can not reach a long full closed condition. So the experimental data provided by the air purification system can not be used directly. It is necessary to re demonstrate the data before the installation. For example, observe the air quality of the classroom running for 20 minutes, and the air quality in the classroom in 30 minutes.
in order to do well to install the air purification system in the classroom, we need full and accurate data to demonstrate that there are 8 classrooms in 8 schools with different air purification systems with different schemes and different styles. After the beginning of school, we will combine the environmental protection department and the quality supervision department with the three party inspection agency. The demonstration plan of installing air purifier is put forward to provide data and theoretical basis for the next implementation plan of installing air purifier. Dou Fenglei said that the introduction of the installation plan will be widely consulted by parents, experts, and so on, after the proposal is not a problem, and then enter the government procurement, installation. In the early days of
, the staff of the education bureau made statistics on the mild, moderate and severe haze days of the year. In addition to the July and August summer vacation, the number of mild haze days in June and September was not more than 5 days, while in November and December the number of mildly haze days was about more than 50 days. From this point of view, the fog and haze became frequent in November. At present, a lot of parents are concerned about the time to use the air purification system. The staff of the Bureau of education in the Central District of the city said that the air purification system in every classroom of all district schools before the haze season this year is to ensure the students to get real benefits. In addition, after the installation of air purification system, the school will issue corresponding opinions.
reporter visits
air purification system into the classroom, which problems need to be cracked?
in school classrooms suitable for air purifier or new wind system?
(advantages) can filter PM2.5, PM10 and other harmful substances PM2.5, carbon dioxide concentration, formaldehyde and so on can handle
[missing] It is impossible to deal with the concentration of carbon dioxide, such as high energy consumption, large noise, summer heat in the classroom and cold
internal circulation (after filtering the indoor air through filter screen)
new air system
outer circulation (the outdoor air is treated to the outside. Indoor emission of fresh air)
problem one in addition to solving PM2.5, how can the concentration of carbon dioxide in the classroom be high?
in the classroom of primary and secondary school, there are 45 or 50 people in the classroom of 60 square meters. In order to keep warm and prevent haze in winter, the doors and windows are closed in class, so the indoor two carbon dioxide concentration is high. Maybe you have this feeling when you go to school. It's easy to be sleepy in class. In addition to the lack of brain oxygen supply, there is a reason for.Amp; lsquo carbon dioxide anesthesia.Amp; rsquo. An air purifier installer said that in addition to the need to solve the PM2.5 content in the classroom, we need to solve the carbon dioxide concentration. The installation of air purifier can not solve the problem of carbon dioxide concentration.
reporter found from the 3 pilot schools visited, in some classrooms, a clean air purifier and a new wind system. In some classrooms, new wind systems and air purifiers were installed in one. The new air system was installed only in the classroom. In addition, the reporter found that the air purification equipment installed in some classrooms is vertical, and some are hanging on the roof of the 4 side of the winder, and the equipment to take the wind to take the pipe. Exactly which combination scheme purify the PM2.5 effect well, and the concentration of carbon dioxide is not exceeding the standard. After school, the students will be tested after entering the classroom.
problem two air purification system has a strong purification effect and how much noise energy consumption can break?
come up with an optimized installation scheme for air purification system in the classroom. The existing building conditions, electric load, noise and classroom temperature of the school need to be taken into consideration. Reporters learned that, because the classroom in 40 minutes or 45 minutes next class, can not have a closed space. The air purification system needs to purify the air in the classroom in a relatively short time, that is to say, the efficiency of purification is high. If a 60 square meter classroom installed several new wind systems, the purification effect is good, but there will be large energy consumption and noise problems.
especially in students' self study, dictation and other quiet environments, the noise of equipment operation will be very clear. In addition, the school should consider the problem of electric load, if a school has 40 classrooms, if a classroom is equipped with 3 new wind systems, the purification effect is good, the 120 new wind systems can run simultaneously, and the electricity of other electric teaching equipment can not bear the load of the whole electricity. In view of this, the purification effect is a contradiction between energy consumption and noise. According to the relevant standards, the noise in the classroom should not exceed 45 decibels. Therefore, in the process of demonstration of the pilot schools, it is necessary not only to see which air purification system has a good purification effect, but also to see if the noise is exceeding the standard, and whether the power grid of the school can bear.
in addition, the reporter learned that it is good to not see the air cleaning effect in the new wind system, but if a number of new wind systems are installed in a classroom, there will be a hot summer weather in a classroom. This is related to the working principles of the external circulation of the new wind system;.Amp; mdash.amp; mdash to process outdoor air into the room. Therefore, the installation scheme of the air purification system also needs to consider the changes in the temperature in the classroom.
at present, we need to demonstrate and compare various installation plans, and use data to speak, so as to choose the best installation plan. In the middle of the city, a staff member said that the pilot demonstration of the 8 schools is very important. If there is no sufficient demonstration of the hasty installation of air purification system, the problems of noise and energy consumption are difficult.