Method for quick pyrolysis treatment and in situ conversion product utilization of sludge

A conversion and sludge technology, which is applied in the direction of sludge treatment, pyrolysis treatment of sludge, water/sludge/sewage treatment, etc., can solve the problem of sludge incineration technology failing to achieve industrial application, poor public acceptability, and operational problems. High cost and other issues, to achieve high energy recovery and utilization efficiency, reduce energy consumption and operating costs, and low operating costs

Active Publication Date: 2013-06-26
HANGZHOU HUHUI ENVIRONMENTAL PROTECTION TECH
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Problems solved by technology

However, since sludge incineration produces a large amount of toxic and harmful gases (including carcinogens such as dioxins), and the effective removal and purification of these gases requires a large amount of facility investment and capital investment, this sludge disposal

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Embodiment Construction

[0025] The present invention is illustrated below in conjunction with embodiment:

[0026] The rapid pyrolysis treatment of the sludge and the in-situ utilization method of the conversion product are carried out according to the following steps:

[0027] (1) Sludge dehydration and drying: The sludge is mechanically dehydrated, and after 20-30% of water is removed, it is further dehydrated by a sludge dryer. In order to ensure that the pyrolysis oil produced by sludge pyrolysis processing has high quality and calorific value, the sludge is fully dried so that the solid content reaches 90-95%;

[0028] (2) Medium-temperature rapid pyrolysis treatment of sludge: transfer the dried sludge to the pyrolysis reactor for heat treatment, so that the sludge can be converted into pyrolysis oil, pyrolysis carbon and pyrolysis gas. In order to increase the output of pyrolysis oil and reduce the volatilization of heavy metals contained in the sludge during the pyrolysis process, the medium...

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Abstract

The invention relates to a method for quick pyrolysis treatment and in situ conversion product utilization of sludge. The method comprises six steps of sludge dehydrating and drying, quick intermediate temperature sludge pyrolyzing, pyrolytic product separating, pyrolytic oil power generating and waste-heat utilizing, pyrolytic gas recycling and pyrolytic carbon activating and activated carbon absorbent refining of waste gases. The method is adopted to treat the sludge produced by urban sewage treatment plants and the industrial sludge produced by industries such as papermaking, leather, dyeing and finishing, the sludge can be obviously reduced, the pyrolytic conversion product of the sludge is utilized for the sludge reduction treatment and waste gas purification in situ, and links such as storage and transportation are dispensed; and the method is an intensive treatment mode and has the advantages of high energy recovery rate, small secondary sludge, high harmless degree, low operation cost, obvious environmental benefit and the like.

Description

technical field [0001] The invention relates to a treatment and utilization method of sludge produced in urban domestic sewage treatment plants and industrial sludge produced in industries such as papermaking, leather, printing and dyeing. Background technique [0002] With the development of urbanization and the emphasis and strengthening of water environment management, the scale and degree of urban sewage treatment are increasing day by day. By the end of 2010, the scale of urban sewage treatment in my country had reached 124.76 million cubic meters per day. Sludge from urban sewage treatment plants (abbreviated as sludge) is an unavoidable by-product in the sewage treatment process, mainly from primary sedimentation tanks, secondary sedimentation tanks and other process units. per ten thousand m 3 After the sewage is treated, 5-10 tons of sludge will be produced (according to the water content of 80%). It is estimated that the current annual sludge production in my cou...

Claims

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Application Information

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IPC IPC(8): C02F11/10C02F11/12C02F11/00C10B53/00C10B57/00C01B31/08C01B31/10B01D53/02B09B3/00F02G5/00C01B32/324C01B32/336
CPCY02E20/14Y02P20/129Y02T10/12Y02W10/40Y02W30/20
Inventor 曹玉成
Owner HANGZHOU HUHUI ENVIRONMENTAL PROTECTION TECH
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