Environment-friendly boiler for waste liquid treatment

The embodiment of the utility model relates to the field of boiler structures, and discloses an environment-friendly boiler for waste liquid treatment. A combustion chamber, a reversal chamber, a front smoke box and a rear smoke box are installed in the shell, one end of the combustion chamber is connected to the inner wall of the shell, the other end of the combustion chamber is communicated with the reversal chamber, the front smoke box is connected to the inner wall of the shell, the combustion chamber penetrates through the front smoke box, the front smoke box is communicated with a smoke pipe assembly, and the smoke pipe assembly is communicated with the rear smoke box and the reversal chamber. A flexible filter layer is further installed in the shell and installed on the inner wall of the shell, an included angle is formed between the flexible filter layer and the combustion chamber, and the combustion chamber penetrates through the flexible filter layer. The periphery of the shell is connected with a d