Horizontal industrial coal dust boiler

The utility model relates to a horizontal industrial coal dust boiler which comprises one cylindrical boiler shell in transverse arrangement, one fire cylinder obliquely arranged in the boiler shell, one front smoke box arranged in the front of the boiler shell, one smoke collecting chamber arranged on the upper part of the back end of the boiler shell, one back smoke box arranged on the lower part of the back end of the boiler shell, one partition plate arranged between the smoke collecting chamber and the back smoke box, one ash falling pipe which is arranged at the bottom of the back smoke box and is communicated with the back smoke box, one chimney which is arranged on the top of the smoke collecting chamber and is communicated with the smoke collecting chamber, a set of two back stroke smoke pipes respestively arranged on the left and the right of the lower part of the fire cylinder, a set of three back stroke smoke pipes respectively arranged on the left and the right of the upper part of the fire cylinder, wherein an inlet of the fire cylinder is positioned on the upper part of a front end plate of the boiler shell, and an outlet of the fire cylinder is positioned on the lower part of a back end plate of the boiler shell; both ports of each pipe of the two back stroke smoke pipe are respectively connected with the lower parts of the front and the back end plates of the boiler shell; both ports of each pipe of the three back stroke smoke pipes are respectively connected with the upper parts of the front and the back end plates of the boiler shell. The utility model can be widely suitable for various occasions needing medium and small-sized industrial boilers.