High-temperature oxidation, pyrolysis and thermal desorption integrated oily sludge treatment apparatus and process technology

Abstract

The invention discloses high-temperature oxidation pyrolysis and thermal desorption integrated aged oil sludge treatment apparatus and process technology. The high-temperature oxidation pyrolysis and thermal desorption integrated aged oil sludge treatment apparatus comprises an indirect heating drying kiln, and a raw material conveying device A is mounted at the feeding end of the indirect heating drying kiln; a raw material conveying device B is connected between the discharging end of the indirect heating drying kiln and a feeding opening of an oxygen-controlled thermal desorption unit in a communicated mode; a raw material conveying device C is installed at a discharging opening of the oxygen-controlled thermal desorption unit; an oxygen-controlled hot air generator is arranged at a combustion opening of the oxygen-controlled thermal desorption unit; oily sludge is directly heated through oxygen-controlled high-temperature flue gas; the oily sludge is subjected to high-temperature oxidation at the tail end of the oxygen-controlled thermal desorption unit, so that oil is thoroughly removed, heat energy is released, and the heat efficiency is improved on the basis of direct heat exchange; a flue gas electric heating system is arranged for flue gas discharged from the oxygen-controlled thermal desorption unit, so that the flue gas is prevented from condensing and blocking equipment; and oil products are recycled after the oil-containing and dust-containing flue gas subjected to thermal desorption is purified, and the recycled oil is high in quality and can be recycled.

Description

technical field [0001] The invention relates to the technical field of oily sludge treatment, in particular to a high-temperature oxidation, pyrolysis, pyrolysis, and desorption integrated treatment equipment and technology for aging oily sludge. Background technique [0002] The random disposal of oily sludge not only wastes resources, but also pollutes the soil and the atmosphere. What is more serious is that the migration and penetration of petroleum hydrocarbons in the soil will pollute the groundwater and cause permanent damage to the ecosystem. Harmful substances in oily sludge enter the water system or farmland, are absorbed by plants, and enter the human body through the food chain, causing various diseases and threatening human health. [0003] The current common treatment processes for oily sludge are as follows: [0004] 1) Incineration method [0005] Advantages: reduction, complete harmlessness [0006] Disadvantages: No recycling of resources, large investme...

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Problems solved by technology

[0006] Disadvantages: No recycling of resources, large investment, large land occupation, easy to coke, easy to cause secondary pollution

[0010] Disadvantages: large investment, large area, large loss of extraction agent, easy to produce secondary pollution

[0014] Disadvantages: no resource recovery, the application is limited by factors such as temperature and humidity

[0018] Disadvantages: It is difficult to meet the standard of oil content lower than 0.3%, low thermal efficiency, small disposal volume, high energy consumption

[0022] Disadvantages: large amount of flue gas, difficult control of fly ash, poor equipment stability, large investment, and current technology cannot effectively recover oil products

[0024] The above-mentioned existing oily sludge disposal methods (except direct thermal desorption) all have many disadvantages: the range of oily sludge that can be disposed of is narrow, the disposal volume is small, the efficiency is low, the oil content after disposal is high, and secondary pollution etc., while the disadvantages of the existing direct thermal desorption technology:

[0025] 1) The scope of application is narrow, and only oily sludge with low oil content can be disposed of

[0026] 2) The disposal is not thorough enough, most of the residue oil content after disposal cannot meet the requirement of less than 0.3%, even if it can reach 0.3% oil content, the disposal volume is small and the efficiency is low

[0027] 3) Oil and gas cannot be effectively recycled

Some processes can recover oil, but the oil quality is poor

[0028] 4) The amount of flue gas and fly ash is large, which can easily cause pipeline blockage and affect the continuous operation of the equipment

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