Vacuum pumping nitrogen filling apparatus for cold-hot plate passage

The utility model relates to a special-purpose box body for processing modularized sewage water, whose main body is in a rectangle shape, two rear ends are respectively provided with an upper, a middle and a lower joint pipes which are the same and are provided with the same flanges, and the lateral surface and the bottom are provided with reinforced ribs. At least four corners of the bottom of the main body are provided with support legs which are used to support the box body, the central portion of the bottom of the main body is provided with joint pipes which are the same to the joint pipes on the front end and the back end of the main body and are provided with the same flanges, a frame on the top edge of the main body is provided with a plurality of lifting rings which are used to overhang. The main body is made of anti-corrosion steel or is made of carbon steel plates, and an anticorrosive coating is lined on the inner side of the main body. Standardized processing devices of different techniques are ar