Sludge conveying device, sludge conveying system and sludge conveying method

The invention relates to a sludge conveying device, a sludge conveying system and a sludge conveying method.The sludge conveying device comprises a conveying assembly and a temperature adjusting assembly, the conveying assembly comprises an outer pipe body and an inner pipe body which are connected in a sleeved mode, and the inner pipe body is provided with a first channel used for conveying sludge in the first direction; the conveying assembly is provided with a sludge inlet communicated with the first channel and a sludge outlet communicated with the first channel, and a second channel for high-temperature gas to flow through so as to exchange heat with the sludge in the first channel is formed between the outer pipe body and the inner pipe body; the temperature adjusting assembly is used for adjusting the temperature of the high-temperature gas so that a gasification film can be formed on the inner wall of the inner pipe body, the conveying effect of the sludge conveying device can be improved, the sludge