Processing method for preparing liquid fuel by performing sludge liquefaction

A process method and liquid fuel technology, applied in the direction of liquid carbon-containing fuels, chemical instruments and methods, fuels, etc., can solve the problems of unspecified water utilization, high heteroatom content in oil products, and adverse environmental effects, etc., to achieve As well as significant environmental and social benefits, excellent product oil quality, and the effect of promoting sludge liquefaction

Inactive Publication Date: 2014-03-05
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional sludge treatment methods mainly include: landfill, fertilization, and incineration, etc., but they all have obvious disadvantages: landfill and fertilizer utilization cause serious pollution to water bodies, and heavy metals in sludge are enriched by plants and passed through the food chain. The transmission with the biological chain has a toxic effect on humans; due to the low calorific value of the sludge itself, the incineration treatment will consume a large amount of auxiliary fuel, and at the same time, the high m

Method used

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  • Processing method for preparing liquid fuel by performing sludge liquefaction
  • Processing method for preparing liquid fuel by performing sludge liquefaction

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Experimental program
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Effect test

Embodiment 1

[0035] Accurately weigh 100g of sludge raw material and 1g of ferrous sulfide catalyst, mix uniformly to form a slurry, add it to the tank reactor, and fill it with sludge raw material (dry basis) mass volume ratio (kg / m 3 ) to 1:2 carbon monoxide gas, raise the reactor temperature to 300°C, and react under this condition for 30 minutes. After the reaction is completed, cool down rapidly, collect the gas and materials in the kettle, and obtain light oil, medium oil, heavy oil, non-condensable gas, water and residue after materials are separated by high temperature, low temperature, solid-liquid, oil-water and distillation.

Embodiment 2

[0037] Accurately take by weighing 100g sludge raw material, 20g embodiment 1 gained aqueous phase and 1g ferrous sulfide catalyst, mix uniformly to form slurry, join in the tank reactor, fill with sludge raw material (dry basis) mass volume ratio ( kg / m 3 ) to 1:2 carbon monoxide gas, raise the reactor temperature to 340°C, and react under this condition for 30min. After the reaction is completed, cool down rapidly, collect the gas and materials in the kettle, and obtain light oil, medium oil, heavy oil, non-condensable gas, water and residue after materials are separated by high temperature, low temperature, solid-liquid, oil-water and distillation.

Embodiment 3

[0039] Accurately weigh 100g of sludge raw material, 20g of wood vinegar and 1g of sodium carbonate catalyst, mix uniformly to form a slurry, add it to the tank reactor, and fill it with sludge raw material (dry basis) mass volume ratio (kg / m3) 1:2 syngas (H 2 :CO=1:1), raise the temperature of the reactor to 360°C, and react under this condition for 30min. After the reaction, cool down rapidly, collect the gas and materials in the kettle, and obtain light oil, medium oil, heavy oil, non-condensable gas, water and residue after high-temperature separation, low-temperature separation, solid-liquid separation, oil-water separation and distillation.

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Abstract

The invention discloses a processing method for preparing a liquid fuel by performing sludge liquefaction. The processing method comprises the following steps: 1, mixing a sludge raw material, a recycling solvent and a catalyst in proportion at a certain temperature so as to obtain a slurry; 2, after preheating the slurry, and mixing the slurry and reaction gas to generate a liquefaction reaction; 3, performing gas-liquid separation on a liquefied product, and separating a gas phase by using an oil-water separator to obtain light oil, gas and a water phase, performing desulfurization and decarbonization on the gas phase to obtain noncondensable gas, performing settling separation on a liquid phase to obtain an oil phase and residues, and distilling the oil phase to obtain medium oil and heavy oil; 4, pressurizing partial noncondensable gas to return the partial noncondensable gas into a reactor so as to participate in a liquefaction reaction; 5, returning partial water phase to the slurry preparation step. According to the processing method, the sludge raw material without drying treatment is directly subjected to a hydrothermal liquefaction reaction under the atmosphere of CO or synthesis gas, not only can a lot of water in the raw material be consumed, but also the quality of the liquefaction product is improved, so that high-quality oil and other products are obtained. By adopting the processing method, the organic substances in the sludge are efficiently transferred, and the processing method has good environment and social benefit.

Description

technical field [0001] The invention relates to a technique for making sludge into liquid fuel, and belongs to the field of sludge resource processing. Background technique [0002] Sludge is the product of sewage treatment. It is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles and colloidal sludge. It has high water content, high heavy metal content and high harmful microorganism content. specialty. At present, my country's sludge treatment technology has been lagging behind the corresponding sewage treatment technology. According to the "Twelfth Five-Year Plan" National Urban Sewage Treatment and Recycling Facilities Construction Plan, as of the end of the "Eleventh Five-Year Plan" in 2010, China's urban sewage treatment The harmless disposal rate of the sludge produced by the plant is less than 25%. 80% of the sludge produced by my country's sewage treatment plants has not been properly treated. widespread attention...

Claims

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Application Information

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IPC IPC(8): C10L1/00C02F11/00
Inventor 吴幼青吴诗勇聂立覃小刚李良黄胜高晋生文陆房慧
Owner EAST CHINA UNIV OF SCI & TECH
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