How to design exhaust system of workshop purification project?
Release time:2020-01-07 source:
How to design the exhaust system of the workshop purification project? Let's study it together today.
The position of the exhaust outlet in the workshop purification project is determined by the production process, and the exhaust has the following functions:
① Remove harmful gas and dust emitted during production.
Second, exhaust heat. For example, the exhaust in the purification project of operating room is to remove anesthetic gas, disinfection gas and bad smell; the exhaust in the tablet workshop is mainly to remove the drug dust generated in the production process; the exhaust in the small injection packaging process is to remove the combustion products and heat generated. In the design of exhaust system of workshop purification project, the calculation of exhaust air volume is similar to that of ventilation and air conditioning project, which will not be discussed here.
This paper mainly discusses how to design the exhaust system of workshop purification project scientifically, which can not only meet the process requirements, but also save energy consumption. Because the exhaust air volume increases, the fresh air volume also increases, and the energy consumption will inevitably increase.
This paper discusses the design method of the exhaust system of the workshop purification project, taking the crushing and screening clean room of the solid preparation workshop as an example. The process of raw and auxiliary materials entering the production workshop is crushing and screening, while the dust production points of the crushing process are mainly at the feeding port, the discharging port and the receiving device. If you are not familiar with this process, it is also a method to set the exhaust hood according to the position of the dust production point.
However, this method has a large exhaust air volume (large energy consumption), poor dust removal effect, and even drug dust will diffuse in the whole room, which is very harmful to the health of workers. Therefore, if we change the method of air exhaust and dust control, the effect will be very different. The dust at the feeding port of the crusher is not large, and a small exhaust hood (300mmx300mm) is set to remove the chemical dust emitted during feeding.
At the outlet and receiving bag, there is a lot of dust. The rotation of the blade of the crusher is as pressurized as the blade of the fan, which makes the positive pressure generated there very large. It is difficult to effectively control the drug dust with the largest exhaust hood. Therefore, according to this feature of the process, a closed material receiving box can be set at the discharge port, and a closed door and an air outlet can be set on the material receiving box. As long as the exhaust air volume is very small, negative air can be generated in the box and many measures to reduce the exhaust air volume will not be listed one by one.
The key to the design of the exhaust system of the workshop purification project is the design of the exhaust (dust exhaust) scheme. Through in-depth understanding of the production process and familiar with the characteristics of dust and heat production, an effective heat capture and exhaust scheme (using closed box, closed chamber, air curtain isolation plus exhaust hood, exhaust hood) is developed. But all measures shall not affect the production process operation, and shall not increase the hidden danger of dust collection and production for the workshop purification project. That is to say, dust removal, heat removal, dust collection and other facilities shall not collect and produce dust.
As a powerful purification engineering company in China, Shandong ed purification Engineering Co., Ltd. has a special project department responsible for the design, production, installation and commissioning of purification in food workshop, cosmetics workshop, printing and packaging workshop, and electronic dust-free workshop. The company integrates professional scheme design team, complete supporting product channels, professional system construction team and perfect after-sales service. With the relevant construction qualification issued by the national construction department; with an experienced engineering technology research and development team; with years of professional accumulation in the field of purification, combined with the construction management practice of many domestic projects, to provide comprehensive and high-quality overall purification system technical support for domestic customers. If you want to know more about the workshop purification construction, please contact the engineering personnel of the project department in detail. For more knowledge of clean room purification industry, please pay attention to WeChat public address: Aide-188 (Ed purified oxygen supply).