Formaldehyde production device capable of recovering waste heat

The formaldehyde production device comprises a water storage tank, a purification tank, a production tank, a communicating pipe, a heat conduction pipe, a conveying pipe, a partition plate, a discharging pipe, a storage device, a reactor and two groups of filter elements, the storer and the reactor are mounted in the production box side by side; a smoke outlet pipe is arranged on the production box; the water storage tank is connected with the production box; the purification tank extends into the water storage tank; the partition plate is mounted in the purification box and divides the purification box into an upper purification space and a lower purification space from top to bottom; the two groups of filter elements are respectively mounted in the upper purification space and the lower purification space; one end of the communicating pipe is communicated with the smoke outlet pipe, and the other end of the communicating pipe penetrates through the sealing door and extends into the upper purification space;