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A kind of sludge treatment method

A sludge treatment and mixed sludge technology, applied in water/sludge/sewage treatment, oxidation treatment of sludge, metallurgical wastewater treatment, etc., can solve problems such as urban environmental pollution

Active Publication Date: 2016-08-17
廊坊新奥龙河环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a sludge treatment method, which can reasonably and effectively process mixed sludge and solve the problem of urban environmental pollution

Method used

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  • A kind of sludge treatment method
  • A kind of sludge treatment method
  • A kind of sludge treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Use 1# municipal sludge raw material 95%, 3# steel mill sludge raw material 5%, oxidant is O 2 After grinding, add compounding agent (a mixture of lignosulfonate and humate, the addition ratio is 1:0.5, and the addition amount is 0.5wt‰) to the sludge to make its concentration reach 7%, and control the temperature of the reaction system The temperature is 580°C, the reaction pressure is 22MPa, the residence time of the mixed sludge of municipal sludge and steel mill sludge in the first high-pressure gas-liquid separator is 15min, and the outlet product at the upper end of the first high-pressure gas-liquid separator is decompressed CO, N are obtained after valve decompression 2 、CH 4 and other mixed gases, which contain a small amount of CO 2 Gas, the product at the outlet of the lower end of the first high-pressure gas-liquid separator enters the second high-pressure gas-liquid separator, and the product at the upper end is decompressed by a pressure reducing valve t...

Embodiment 2-8

[0076] For the specific process of Examples 2-8, see Example 1, and for the relevant parameters in each example, see Tables 4-5.

[0077] Table 4 Examples 1-4

[0078]

[0079] Note: COD* is chemical oxygen demand; municipal sludge and steel mill sludge are allocated according to percentage, totaling 100%.

Embodiment 5-8

[0082] Note: COD* is chemical oxygen demand; municipal sludge and steel mill sludge are allocated according to percentage, totaling 100%.

[0083] It can be seen from the above that the sludge treatment method provided by the embodiment of the present invention can make the mixed sludge react with the oxidant in supercritical water to be completely decomposed, and generate CO 2 Gas and slag water rich in metal oxides. This method can not only treat CO 2 The realization of resource utilization can also effectively transform the N, S, and P elements in the organic matter, and realize harmless treatment. At the same time, since steel mill sludge contains a large amount of transition metal elements, it plays a role in catalytic oxidation under the action of supercritical water oxidation, and also realizes the enrichment of transition metal elements, which is especially beneficial to the sludge containing heavy metal elements. Harmless treatment in the later stage to reduc...

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Abstract

The embodiment of the invention provides a sludge treatment method and belongs to the field of sludge treatment. By virtue of the sludge treatment method, the mixed sludge can be reasonably and effectively treated, and the problem of the urban environmental pollution can be solved. The sludge treatment method comprises the following steps: mixing municipal sludge and steel mill sludge to obtain mixed sludge; grinding and sieving the mixed sludge, exchanging heat of the mixed sludge and feeding the mixed sludge to a reactor; enabling the mixed sludge to carry out oxidation reaction with an oxidizing agent under the super-critical state to generate a reaction product; cooling the reaction product, and subsequently carrying out high-pressure gas-liquid separation to obtain power tail gas, CO2 gas and residue water rich in metallic oxide. The sludge treatment method can be applied to combined treatment of the municipal sludge and the steel mill sludge.

Description

technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge treatment method. Background technique [0002] In recent years, with the rapid development of the economy and the acceleration of the urbanization process, the amount of municipal sewage treatment has increased, resulting in an increase in the amount of sludge produced after flocculation and settlement in the process of sewage treatment. In addition, with the development of the steel industry, a large amount of sludge from steel mills is also produced. Municipal sludge and steel mill sludge constitute the main source of mixed sludge, among which steel mill sludge is rich in transition metal elements such as Fe, Mn, Ni, Cr, Mo, V, Ti, Zn, Cu , As, etc., are common components in steel mill sludge, and municipal sludge has a high calorific value. But both contain large amounts of water, making them difficult to recycle economically. [0003] At present, most of the mixed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/06
CPCC02F11/06C02F2101/20C02F2101/30C02F2101/38C02F2101/40C02F2103/16
Inventor 宋庆峰程乐明王青高志远
Owner 廊坊新奥龙河环保科技有限公司