subpressure meaning in English

低异常压力

After the coke being puted into the coke - quenching device , the lid of the device should be shut at once . while the suction pump , refrigeration compressor , high pressured water circuling pump are started , the subpressure will be produced by the burning coke . then , in the vacuum , the coke will be extinguished in a flash . the burning of the coke instantly , still , produces a large quantity of heat which can be taken away by circulating water in refriger and the interlayer , after that , the temperature will fall to 60oc , even lower . in this condition , the coke will be pushed out to be stored , thus , the coke won ' t rekindle
当焦炭推上拦焦车进入熄焦器后，立即关闭罐盖，同时启动真空泵、冷冻机、高压循环水泵，这时，燃烧着的焦炭就会因真空泵把熄焦器内抽成负压，由于缺氧，使焦炭熄灭，虽然煤炭在瞬间被熄灭，但由于焦炭生成过程中所产生的大量的热量还存在，这时，冷冻机和夹层中的循环水的工作就会把焦炭中的热量带走，使之在短时间内将温度降到60以下，在这种状态下把焦炭从熄焦器内推出入库，焦炭就不会复燃。