NOVELTY - The apparatus has a sludge feeding hopper (1) and calcium oxide additive automatic feeding system (3) that are arranged on top portion of a sludge storage chamber (2). A sludge lifting belt machine (4) is arranged below hoppers evenly distributed on bottom of storage chamber. A sludge subtraction measuring system (5) is arranged at inlet of blending hopper (6) on top end of sludge lifting belt machine. The lower part of outlet of blending hopper is provided with feeding belt machine (14) connected with primary and secondary agitation tanks (7,15).    USE - Apparatus for synthesizing fuel by sludge.    ADVANTAGE - The cost of producing the apparatus is reduced, sludge processing scale and automation are improved, and secondary pollution is avoided.    DETAILED DESCRIPTION - The apparatus has coke foam measuring feeding system (9) and coal foam measuring feeding system (11) that are connected with the sludge subtraction measuring system by the pipelines. The outlet of pipeline is connected with primary agitation tank. The iron oxide additive storage tank (13) and additive heating device (12) are connected with secondary agitation tank. The finished product material belt machine (16) is arranged on bottom end of secondary agitation tank, for transmitting sludge fuel finished product to finished product storage zone (17).    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the apparatus for synthesizing fuel by sludge.    Sludge feeding hopper (1)    Sludge storage chamber (2)    Calcium oxide additive automatic feeding system (3)    Sludge lifting belt machine (4)    Sludge subtraction measuring system (5)    Blending hopper (6)    Primary agitation tank (7)    Coke foam measuring feeding system (9)    Coal foam measuring feeding system (11)    Additive heating device (12)    Iron oxide additive storage tank (13)    Feeding belt machine (14)    Secondary agitation tank (15)    Finished product material belt machine (16)    Finished product storage zone (17)