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Drying incineration process of urban domestic sludge

A technology for drying municipal domestic sludge, which is applied in the direction of incinerators, combustion methods, combustion types, etc., can solve the problems of high energy consumption, high operating costs, and low calorific value of urban sludge on a dry basis, so as to reduce energy consumption and The effect of operating cost, high calorific value, high application value and economic benefit

Pending Publication Date: 2021-02-23
广州市净水有限公司
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  • Description
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Problems solved by technology

The calorific value of sludge has a crucial influence on the selection of incineration process. Compared with developed countries such as Europe and the United States, the dry basis calorific value of urban sludge in my country is relatively low; High moisture content, high moisture content and low sludge calorific value make most domestic sludge drying and incineration processes have disadvantages such as high energy consumption and high operating costs

Method used

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  • Drying incineration process of urban domestic sludge

Examples

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Effect test

Embodiment 1

[0031] Embodiment 1 A kind of dry incineration process of municipal domestic sludge

[0032] The dry incineration process specifically includes the following steps:

[0033] (1) In the summer, 600t of wet sludge was collected from the sewage plant in the central city of Guangzhou, with a moisture content of 80% and a low calorific value of 1700kcal / kg on a dry basis. The collected sludge was dried in a sludge dryer to Moisture content is 65%;

[0034] (2) 6 t of Taibai flower residues were collected from a pharmaceutical factory in Guangzhou; the collected Taibai flower residues were dried to a moisture content of 40%;

[0035] (3) Mix the dried sludge in step S1 with the dried Taibai flower dregs in step S2 to form a mixed material, and the dry basis calorific value of the mixed material measured by an automatic calorimeter (IKA-CA000) is 3700kcal / kg, crushed to 40 mesh by the crusher, then sent to the bubbling fluidized bed incinerator for incineration, the incineration t...

Embodiment 2

[0037] Embodiment 2 A kind of dry incineration process of municipal domestic sludge

[0038] The dry incineration process specifically includes the following steps:

[0039] (1) In winter, 600t of wet sludge was collected from the sewage plant in the central urban area of ​​Guangzhou, with a moisture content of 80% and a low calorific value of 2700kcal / kg on a dry basis. The collected sludge was dried in a sludge dryer to Moisture content is 55%;

[0040] (2) Collect 4t of notoginseng dregs from a pharmaceutical factory in Guangzhou; dry the collected notoginseng dregs to a moisture content of 30%;

[0041] (3) The sludge dried in step S1 is mixed with the dried Taibai flower dregs in step S2 to form a mixed material, and the dry basis calorific value of the mixed material measured by an automatic calorimeter (IKA-CA000) is 3850kcal / kg, after being crushed to 80 mesh by a crusher, it is transported to a bubbling fluidized bed incinerator for incineration. The mixed material c...

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Abstract

The invention relates to the technical field of sludge treatment, in particular to a drying incineration process of urban domestic sludge. In order to overcome the defects of high energy consumption and high operation cost of an existing drying incineration process of urban domestic sludge, Chinese medicine residue with a high heat value is used for doping urban domestic sludge with a low heat value according to a certain proportion, the overall heat value of the sludge is increased, the sludge can be incinerated in a self-sustaining mode without adding auxiliary fuel, the operation cost can be reduced, energy-saving operation is achieved, waste can be treated with waste, meanwhile, reduction, stabilization and harmless treatment of the Chinese medicine residue and the urban domestic sludge is achieved, and high application value and economic benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a drying and incineration process of municipal domestic sludge. Background technique [0002] With the development of economy and the increase of urban population, the discharge of urban domestic sewage is increasing day by day, and the output of sludge is also increasing rapidly. The composition of sludge is very complex. It is an aggregate composed of bacterial micelles formed by various microorganisms and the organic and inorganic substances absorbed by them. In addition to a large amount of water, it also contains organic substances that are difficult to degrade, heavy metals and salts, and a small amount. pathogenic microorganisms and parasite eggs. A large amount of untreated domestic sludge not only occupies land, but also causes serious pollution to water bodies, the atmosphere, and the soil environment. Therefore, it is necessary to adopt a scientific and harm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G7/00F23J15/02
CPCF23G7/001F23J15/025
Inventor 常颖匡科帅立辉严兴卢伟汤舒王子源
Owner 广州市净水有限公司
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