Continuous sludge dewatering method based on hydro-thermal treatment
A technology of hydrothermal treatment and sludge dewatering, applied in dewatering/drying/concentrating sludge treatment, sludge treatment through temperature control, etc., it can solve the problems of difficulty in reducing the moisture content of sludge, high energy consumption, etc., to avoid thermal energy consumption Effect
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[0020] The specific embodiments of the present invention will be described in detail below with reference to the drawings and technical solutions.
[0021] As shown in the figure, the continuous sludge dewatering method based on hydrothermal treatment proposed by the present invention includes the following steps:
[0022] 1) The sludge is continuously introduced into the feeding unit through screw or pump.
[0023] 2) The high-temperature filtrate from the continuous extrusion dehydration unit is introduced into the external heat exchanger of the feeding unit, so that the sludge is preheated during the feeding process, and the preheating time is controlled by adjusting the feeding speed.
[0024] 3) The preheated sludge enters the hydrothermal treatment unit under the power of the feeder, which is a sealed environment. The sludge is heated to 150-250℃ through the heating device located outside the hydrothermal treatment unit, and the water Thermal reaction is used to improve the stru...
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