Fire tube and heat tube element used in dust-containing corrosion environment

The utility model relates to the field of flue gas waste heat recovery equipment, in particular to the field of heat pipe elements of heat pipe heat exchangers, in particular to a fire pipe heat pipe element used in a dust-containing corrosion environment, which comprises an inner pipe, a pipe sleeve is fixedly connected to the outer wall of the inner pipe, a sealed compartment is formed between the pipe sleeve and the inner pipe, a working medium is arranged in the sealed compartment, and the working medium is arranged in the inner pipe. A plurality of outer fins are fixedly connected to the outer wall of the pipe sleeve, the inner pipe extends in the vertical direction, hot smoke circulates in the inner pipe, the sealing compartment extends in the vertical direction, the outer fins are fixedly connected to the outer wall of the upper section of the pipe sleeve, the pipe sleeve is arranged around the inner pipe, and the interior of the sealing compartment is vacuum. According to the utility model, the influe