Method and device for solid waste continuous hydrothermal-treatment

A technology of solid waste and wet decomposition, which is applied in the fields of solid waste removal, organic fertilizer, climate change adaptation, etc., and can solve the problem that the harmless treatment rate is less than 20%.

Active Publication Date: 2008-01-02
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, according to the investigation and analysis of 388 domestic waste disposal sites (factories) in 255 cities by the Urban Construction Department of the Ministry of Construction, the ...

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  • Method and device for solid waste continuous hydrothermal-treatment

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[0028] specific implementation plan

[0029] Please refer to Fig. 1 and Fig. 2, the device provided by the present invention, its solid waste enters the feed system 3 (the structure of this feed system 3 as shown in Figure 2) that is driven by feed motor and speed reducer 2 by hopper 1 After being conveyed and extruded by the conical screw 3a, the material enters the conical empty pipe section 3b, and in the conical empty pipe section 3b, due to the thrust behind and the resistance of the cone angle, the material is further extruded to form a dense The sealing plug enters the reactor 4 through the straight pipe transition section 3c.

[0030] The body of the reactor 4 is made of high-strength stainless steel, which is required to withstand a high temperature of 250°C and a high pressure of 35atm at the same time. A steam inlet 4a is installed on one side, and the straight pipe section 3c of the feed system 3 is connected to the steam inlet 4a. Considering that material enters...

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Abstract

The invention relates to a continuous hydrothermal treatment method for solid waste. Solid waste is added into reactor continuously while water steam is added into the reactor as heating source and reacting medium. Material is contacted with water steam in the reactor to react. The device for realizing the method mentioned above comprises a feeding system connected with a material box. The feeding system is a hollow tube. One end of the hollow tube is cone hollow tube segment in transition. A straight transition segment is set at the top of the cone hollow tube segment. A screw with cone head is set in the hollow tube. The cone part of screw is set in the cone hollow segment of hollow tube correspondingly. The tail of screw shaft is connected with feeding motor. The device also comprises a reactor made of high-strength stainless steel. Steam inlet is set at one side of the reactor. The straight tube segment of feeding system is connected with the steam inlet. Screw with wing is set in the reactor. The screw shaft with wing is connected with reactor motor. Material outlet is set at the lower part of the other side of reactor where the reactor is faced with the steam inlet.

Description

technical field [0001] The invention belongs to the field of solid waste treatment, and in particular relates to a method for continuous wet decomposition treatment of solid waste. [0002] The invention also relates to a device for carrying out the method described above. technical background [0003] According to the statistics of the State Environmental Protection Administration, in 2004, 661 cities in my country cleared and transported more than 150 million tons of household garbage, with an annual growth rate of 4%. According to statistics reported by various regions, the current harmless treatment rate of municipal solid waste is about 51%. However, according to the investigation and analysis of 388 domestic waste disposal sites (factories) in 255 cities by the Urban Construction Department of the Ministry of Construction, the standard rate of urban domestic waste treatment facilities in my country is about 25%. Considering factors such as operation management, the ac...

Claims

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Application Information

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IPC IPC(8): B09B3/00C05F9/04C05F9/02
CPCY02A40/20
Inventor 肖云汉田文栋杨远智贾建国
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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