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Technique for producing liquid fuel by graded conversion of sludge

A technology of liquid fuel and process method, which is applied in the direction of chemical instruments and methods, sludge treatment, immiscible solvent sludge treatment, etc., can solve the problems of reduced production rate and impact on economic benefits, and achieve zero discharge and pollution The effect of mud resource utilization

Inactive Publication Date: 2017-03-08
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the hydrothermal liquefaction reaction of this method is carried out under high temperature conditions, it is easy to cause the cracking of small molecular organic matter in the sludge to generate gas products, resulting in a decrease in the yield of the main product oil, thereby affecting economic benefits

Method used

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  • Technique for producing liquid fuel by graded conversion of sludge
  • Technique for producing liquid fuel by graded conversion of sludge
  • Technique for producing liquid fuel by graded conversion of sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: Accurately weigh 100g of raw material sludge and 300g of n-hexane, mix uniformly to form a slurry, add it to a tank reactor, and after nitrogen replacement, the temperature of the reactor is raised to 300°C (reaction pressure 11.3MPa), Extract under these conditions for 30 minutes; after the extraction is completed, gas 1 and the extracted liquid-solid mixture are obtained, and the liquid-solid mixture is filtered to obtain the oil-water liquid mixture and the extraction residue; the oil-water mixture is phase-separated to obtain the oil phase and the water phase, and the oil The distilled phase was distilled to obtain light oil 1 and n-hexane; the aqueous phase and the extraction residue were transferred to a tank reactor, and 1gNa 2 CO 3 and 100g tetrahydrofuran, filled with 4MPa of CO gas, then the reactor was raised to 300°C (reaction pressure 15.1MPa), and the liquefaction reaction was carried out for 30min; after the liquefaction reaction was complet...

Embodiment 2～6

[0042] Embodiments 2-6: Similar operations were performed as in Embodiment 1, except that the reaction conditions, solvent 1, solvent 2 and catalyst were also different, and other steps were the same.

[0043] The reaction conditions and results of Examples 1-6 are shown in Table 2.

[0044] The reaction conditions and the result of table 2 embodiment 1~6

[0045]

[0046] ※ The yields of the above products are all based on the quality of anhydrous and ash-free sludge

[0047] It can be seen from the examples that the present invention recycles most of the organic matter in the sludge, obtains high value-added liquid fuel, and realizes the sludge harmlessness, reduction, energy utilization and resource utilization.

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Abstract

The invention discloses a technique for producing liquid fuel by graded conversion of sludge, comprising the steps of proportionally mixing sludge and solvent 1, performing extractive reaction at certain temperature, and isolating to obtain gas 1, extraction liquid mixture and extraction residue, subjecting the extraction liquid mixture to phase isolation to obtain oil and water, distilling the oil to obtain the solvent 1 and light oil 1, performing liquefaction reaction on the water, extraction residue, a catalyst and solvent 2 under certain conditions, and isolating to obtain gas 2, the solvent 2, light oil 2, heavy oil and residue. Light organic components in sludge are directly extracted as liquid fuel under mild temperature and pressure; water and residue produced by extracting are mixed for liquefaction reaction under high temperature and pressure to further produce liquid fuel, to be specific, organic components in the sludge are isolated and then subjected to graded conversion through two-step process, and high-added-value liquid fuel is finally obtained.

Description

technical field [0001] The invention relates to a technique for transforming sludge into liquid fuels by stages, and belongs to the field of sludge resource utilization. Background technique [0002] Sludge is the product of sewage treatment. It is an extremely complex heterogeneous mixture composed of organic debris, bacterial cells, inorganic particles and colloids. It has high organic matter and water content, heavy metal content and harmful microorganism content. specialty. At present, my country's sludge treatment technology has been lagging behind the corresponding sewage treatment technology. Because a large amount of sewage has been treated to become sludge, the source of its pollution has not been properly treated. The traditional landfill or incineration is still the main method of sludge treatment, which is easy to cause secondary pollution to the environment, and it is impossible to utilize the high value-added organic matter in the sludge as a resource. From a...

Claims

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Application Information

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IPC IPC(8): C02F11/00C10G1/04
CPCC02F11/002C10G1/04
Inventor 吴诗勇吴幼青黄胜
Owner EAST CHINA UNIV OF SCI & TECH
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