Underground sewage pumping is very "not reliable"

Underground sewage pumping is allegedly inconsistent.

Water injection into the ground has a high technical threshold: not only does it require high equipment and processes, but it must also pretreat the water that is to be injected into the ground to ensure that there is no suspended matter or microorganisms in the water and that oxygen is cut off. It is even more important that water injection is not allowed. Corrosive. In addition, when a large number of water injections are to be completed, it is necessary to drill multi-eye wells, and the ground surface also needs to be laid out in a certain geometric shape so as to ensure that the wells do not affect the injection amount. Generally can not be densely arranged in a close distance.

According to the experience of oilfield water injection, the pressure of water injection in the underground 1000 meters is between 100-400 atmospheres, and that for the underground water 100 meters requires more than 10 atmospheres. If underground sewage is pumped through the pump, since there is no oil replacement, it is more difficult to inject sewage into the ground, and the amount of water injected into a single well should be very limited. In addition, illegal companies need to do a detailed geological survey of the reinjected strata, and request higher-qualified drilling teams to carry out design and drilling construction. This is far from the normal underground drilling teams. If underground sewage pumping is used, illegal companies need to have three conditions: First, the technical level is relatively high; Second, economic strength is relatively strong; Third, the boss is more stupid. He believes that, under normal circumstances, underground sewage pumping is "not reliable."

According to the director of a provincial environmental protection department, there is a situation where it is possible: the underground is a cave, a pit, etc. The Environmental Protection Agency has always been highly vigilant. When the public supervises and reports on the illegal discharge of pollutants by enterprises, it can determine whether the wellhead is a pumping well or a water injection well by observing the state of the wellhead. The water flow direction is opposite to that of the water injection well and the pumping well. The pumping well has the lowest pressure at the wellhead, and the injection well is at the wellhead location. The pressure is highest, so the entire injection well is under pressure and the wellhead must be closed.