Regarding the reasons for the explosion of the exhaust pipe of imported vacuum pumps, by organizing relevant information and consulting relevant experts, the following treatment methods have been summarized, hoping to be helpful to everyone.
1. Filtering
During the process of absorbing air in an imported vacuum pump, a small amount of materials and residual liquid will be sucked into the valve plate of the pump, and some lubricating oil will also be stuck on the valve plate of the pump. These substances undergo carbonization and form carbon deposits when exposed to high temperatures for a long time. Under certain conditions, they are prone to detonation when mixed with combustible gases, and are released outward through exhaust pipes to form an explosion. To eliminate this phenomenon, a filtering device can be installed on the gas pipeline before the pump to filter dust or residual liquid, and the filtering facilities can be cleaned regularly to ensure good performance of the device. At the same time, the entire pump body should be maintained and the valve plates should be cleaned in a timely manner. Practice has proven that this work is best done every three months.
2. Cooling
Due to the continuous reciprocating motion of the vacuum pump piston in the cylinder, the pump body temperature is too high, providing conditions for material carbonization and ultimately leading to accidents. To avoid this situation, it is required that operators first open the cooling system of the pump before starting it, and ensure that the inlet and outlet water pipes of the system are unobstructed. The main reasons for accidents caused by the high temperature of the pump body due to the lack of cooling water are the weak sense of responsibility of the operators, violation of operating procedures, and negligence.
3. Shuixi and Buffer
Adding water washing and buffering storage tanks in front of imported vacuum pumps can effectively eliminate the residual liquid sucked in, while also having a certain cooling effect on the mixed air. However, in practical work, there are often two phenomena: first, when the residual liquid in the tank is small, a small amount of material liquid will be sucked into the pump body, and the material will carbonize at high temperatures; Secondly, when there is a large amount of residual liquid, if not discharged in a timely manner, the vacuum pump is highly likely to suck in the material liquid, causing pump flushing and causing significant equipment accidents. Therefore, in the production process, workers need to have a strong sense of responsibility, timely discharge residual liquid, and avoid accidents.
4. Prevention of exhaust pipe blockage or blockage
Blocking or obstructing the exhaust pipe may cause the mixed gas containing methanol vapor to be unable to be discharged in a timely manner. If it accumulates to a certain extent, it will forcefully leak out, causing explosion or even explosion. There are many reasons for this phenomenon, which may be due to design defects, resulting in the exhaust pipe position being relatively low, and there is water or oil accumulation inside the pipe; It may also be due to some human or natural factors, such as the outlet valve not opening or not opening enough, the collapse of the rain cover causing poor exhaust, etc. Therefore, when designing the position of the vacuum pump, the position of the main exhaust pipe and the design of related accessories are also important.
5. Tail gas control
Preventing the explosion of imported vacuum pumps and strengthening exhaust gas control is a very important safety technical measure. The exhaust gas discharged by the vacuum pump is mainly a mixed gas containing a large amount of methanol vapor. Based on the physical and chemical characteristics and work practice of Jia Zui, first install one or several sets of condensing devices (usually using ice salt water at around -10 ℃) in front of the buffer tank to condense the mixed gas; Secondly, a condensing device is also installed on the exhaust pipe to condense the final discharged gas, thereby reducing the concentration of methanol vapor in the discharged gas to below the lower explosive limit and protecting the environment. However, during the condensation process, it is necessary to properly control the flow rate of the condensate. If the flow rate is too small, it can easily lead to poor condensation effect. If the flow rate is too large, it can easily cause blockage of the pipeline due to strong condensation, affecting the vacuum effect.
In summary, adopting these safety measures can effectively prevent the occurrence of explosion in imported vacuum pumps. Of course, to ensure the true safe operation of imported vacuum pumps, in addition to adopting these safety technical measures, it is also necessary to start from multiple aspects such as human, material, and management, and strive to improve the operator's operational skills and safety quality.
