How many casualties were caused by a safety accident in an enterprise in Baiyin City, Gansu Province?

According to relevant media reports, at about 2: 3 on the 6th of this month, an enterprise named Gansu Hongda Aluminum Profile Co., Ltd. in Baiyin District, Baiyin City, Gansu Province, had a condensate flash accident in its melting and casting workshop. Up to now, one person has been killed, two people have been missing, seven people have been slightly injured and the doors and windows of the factory building have been damaged. According to the local people, the noise was very loud when the accident happened, and some people were awakened from their sleep and ran out of their homes to check. After the accident, the main leaders of Baiyin Municipal Party Committee and Municipal Government and local emergency, public security, health and other departments rushed to the scene for disposal. So far, the injured are being treated in the hospital and the cause of the accident is under further investigation.

In fact, as can be seen from the pictures from the scene, after the accident, glass fragments were scattered all over the scene, and the surrounding residents were affected. The windows at home were shattered, the rolling gate was severely deformed, and the smoke generated by the explosion was scattered in the air, visible 1 meters away. Ambulances and fire engines came to the scene one after another. Safety is no small matter, and safety production is more important than everything else. While producing products, we also pay attention to safety production, constantly improve the safety production supervision system, fundamentally cut off the source of risks, replace fire-fighting equipment regularly, and cooperate with fire departments at all levels to do a good job in fire safety, so that we can prevent accidents from "burning", always put safety first, and always maintain a high sense of safety.

speaking of which, it is necessary for us to talk about what is "flash evaporation" of condensed water. Then, what is "condensed water"? According to the explanation of Baidu Encyclopedia, condensed water refers to the liquid water formed by the condensation process of water vapor, which is condensed water. In general, the condensed water flows from the water collecting tray under the evaporator of the indoor unit, and its flow rate is generally related to the moisture content of air, dew point temperature, room temperature, etc., which can be calculated by the psychrometric chart of wet air. Condensed water generally has two characteristics, one is the high quality of water, and the other is the low temperature of condensed water, which is about 1℃ ~ 15℃.

so, what is "flash"? In fact, flash evaporation is a phenomenon that high-pressure saturated liquid enters a relatively low-pressure container, and these saturated liquids become a part of saturated vapor and saturated liquid under the pressure of the container due to the sudden drop of pressure. In practical application scenarios, flash evaporation occurs in the pipeline system, which is easy to cause cavitation damage to the valve. Anti-cavitation high-pressure valve can be selected, which is characterized by multiple throttling to share the pressure difference, and cavitation erosion resistant materials can also be selected. It is worth mentioning that flash evaporation can also be used as energy, which is often used in the recovery of boiler drainage in thermal power plants and geothermal power generation.

However, flash evaporation is also harmful to some extent. Ground flash evaporation is the flash evaporation that occurs in the gathering and separation devices of ground oil pipelines. When the pressure is less than the saturated vapor pressure at the temperature of the produced liquid, saturated vapor will be separated from the produced liquid to form ground flash evaporation. This will cause damage to the ground manifold and devices, and pose a threat to the personal safety of the staff.