Subcritical hydrothermal equipment for sludge treatment

Abstract

The invention discloses subcritical hydrothermal equipment for sludge treatment, which comprises a high pressure pump, a heat exchanger and a reaction kettle, wherein the temperature in the reaction kettle is controlled to be within 320-360 DEG C, and the pressure is controlled to be within 12-15MPa; the reaction kettle is provided with a control valve for controlling a feed inlet and a feed outlet; the feed inlet and the feed outlet are connected to the heat exchanger through the control value; sludge enters the heat exchanger through the high pressure pump and then enters the reaction kettle through the feed inlet so as to be subjected to treatment; the control valve is controlled by a control system; and the heat exchanger is connected with a condenser, and the condenser is connected with a pressure filter for bringing the sludge entering the heat exchanger from the feed outlet and treated by the heat exchanger into being waste water and residue. The subcritical hydrothermal equipment for the sludge treatment, disclosed by the invention, has the advantages of being quick in treatment speed, high in energy utilization rate, convenient for operation and running, and easy to expand the production scale, and the like.

Description

technical field [0001] The invention relates to a hydrothermal equipment, in particular to a subcritical hydrothermal equipment used for sludge treatment, and belongs to the technical field of environmental protection solid waste treatment. Background technique [0002] With the acceleration of urbanization and the increase of sewage treatment rate year by year, the amount of sludge produced by urban sewage treatment plants in my country has increased sharply. By the end of June 2005, 708 sewage treatment plants had been built and put into operation in my country. At present, the annual sludge discharge (dry weight) is about 3 million tons, and it will increase at an annual rate of about 10% in the future. With the sewage plant With the gradual improvement of operating efficiency and the gradual completion of new sewage plants, the annual discharge (dry weight) of urban sludge in my country is estimated to increase to about 8.4 million tons in the end. It is imminent to disp...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problems in the above-mentioned prior art, the present invention provides a subcritical hydrothermal equipment for sludge treatment, which uses continuous subcritical hydrothermal equipment to treat sludge and uses a multi-valve discharge system to discharge The treated sludge can effectively improve the sludge treatment speed and solve the common clogging problem in hydrothermal treatment equipment, and has the advantages of fast treatment speed, high energy utilization rate, convenient operation and easy expansion of production scale, etc.

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