Fluidization heat accumulation type sludge low-temperature catalytic pyrolysis method and device thereof

A technology of catalytic pyrolysis and low-temperature catalysis, which is used in the pyrolysis treatment of sludge, waste heat treatment, vaporization of by-products, etc., can solve the problems of increasing the cost of sewage treatment plants, low degree of automation of equipment, and difficult to deal with odorous gases. Simple, reduce safety hazards and reduce energy consumption

Inactive Publication Date: 2012-08-22
CHONGQING UNIV
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Problems solved by technology

For example: in the process of digestion and conditioning of sludge, a large amount of NH should be discharged 4 、H 2 S, CH 4 , odor and other gaseous pollutants, which will have a negative impact on the environment; in the process of sludge concentration, a large amount of chemicals and part of power will be consumed, which will increase the cost of sewage treatment plants; in the process of sludge dehydration, not only A large amount of po

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  • Fluidization heat accumulation type sludge low-temperature catalytic pyrolysis method and device thereof
  • Fluidization heat accumulation type sludge low-temperature catalytic pyrolysis method and device thereof
  • Fluidization heat accumulation type sludge low-temperature catalytic pyrolysis method and device thereof

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[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Fluidized regenerative sludge low-temperature catalytic pyrolysis method, in this method can be used such as figure 1 The shown device, the method comprises the steps of:

[0033] A. Sludge pyrolysis gas production: Add sludge into the preheating drying chamber 1, and the sludge is evenly distributed on the sieve plate 17 under the rotation of the homogenizing blade 16 set in the preheating drying chamber 1 above, enter the sludge catalytic pyrolysis reaction chamber 19 through the sieve holes 24 on the sieve plate 17, and the Na on the inner wall surface of the sludge catalytic pyrolysis reaction chamber 19 2 CO 3 or K 2 CO 3 A low-temperature pyrolysis reaction occurs under the action of the pyrolysis catalyst, and the sludge after the pyrolysis reaction forms a pyrolysis product, and the pyrolysis product enters the disc...

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Abstract

The invention discloses a fluidization heat accumulation type sludge low-temperature catalytic pyrolysis method. The method comprises the following steps: A, sludge is pyrolyzed to produce gas; B, pyrolysis gas is recycled; and C, the residual heat produced by waste gas combustion is utilized. The invention also discloses a fluidization heat accumulation type sludge low-temperature catalytic pyrolysis device. On one hand, the pyrolysis gas produced by the pyrolyzed sludge is enabled to pass through an air preheater, so that the heat is recycled, and then the pyrolysis gas is condensed by a condenser to obtain tar, and the pollution to the environment due to gas emission is avoided; on the other hand, the pyrolysis waste is directly discharged and collected, the structure is simple, the operation is convenient and the potential safety hazard is also reduced. According to the invention, the fluidization, the pyrolysis of heat accumulation particles and the residual heat produced by pyrolysis gas and waste gas combustion are comprehensively utilized, and tar is also prepared, so that the efficient utilization of energy and resource of sludge and the environmental protection are realized.

Description

technical field [0001] The invention relates to a low-temperature catalytic pyrolysis method and device for solid waste, in particular to a low-temperature catalytic pyrolysis method and device for fluidized heat storage sludge. Background technique [0002] Sludge (Sewage Sludge, SS) generally refers to the mixture or colloid of solids and water deposited in the drainage pipes and channels produced during the water treatment process. An extremely complex heterogeneous body composed of other components. With the acceleration of urbanization and industrialization in my country, the discharge of urban sewage and industrial sewage is increasing. According to the 2010 China Environmental Status Bulletin, 22 million tons of sludge are generated every year, 80% of which have not been effectively treated. Because sludge enriches pollutants in sewage, it contains a large number of toxic and refractory substances such as virus microorganisms, parasite eggs, heavy metals, dioxins, an...

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Application Information

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IPC IPC(8): C02F11/10F27D17/00
CPCY02P10/25Y02W10/40
Inventor 闫云飞杨仲卿张力唐强蒲舸张杰张磊
Owner CHONGQING UNIV
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