Buffer tank for preparing LNG from coke oven gas

The invention provides a coke oven gas LNG buffer tank which comprises a buffer tank body, a pipe body support is welded to the lower portion of the buffer tank body, a gas inlet pipeline is welded to the upper portion of the buffer tank body, a gas outlet pipeline is welded to the upper portion of the right side of the buffer tank body, and a limiting ring is welded to the inner side of the buffer tank body. The sliding mechanical buffer is installed on the lower portion of the inner side of the buffer tank body, the tobacco tar guiding device is installed on the lower portion of the sliding mechanical buffer, and the mechanical driver is installed on the left side of the lower portion of the buffer tank body. The device has the beneficial effects that through the arrangement of the conical guide cover, the conical oil scraping ring, the connecting pipeline, the mounting seat and the compression spring, the conical oil scraping ring can be lifted up and down in cooperation with the air pressure change of the