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A two-stage sludge gasification treatment method and treatment device

A technology of treatment method and treatment device, applied in sludge treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem that the cost of toxic and harmful gas treatment cannot be completely eliminated

Inactive Publication Date: 2016-05-18
ZHEJIANG DEQIAN ENERGY SAVING TECH
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  • Description
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Problems solved by technology

[0004] The invention mainly solves the technical problem that the toxic and harmful gases produced by incineration cannot be completely eliminated during the existing sludge combustion treatment and the treatment cost is relatively high; it provides a two-stage sludge gasification treatment method with energy saving, environmental protection and low treatment cost and processing device

Method used

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  • A two-stage sludge gasification treatment method and treatment device
  • A two-stage sludge gasification treatment method and treatment device

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Embodiment

[0027] Embodiment: A kind of two-stage sludge gasification treatment method of this embodiment, such as figure 1 As shown, the process steps are as follows:

[0028] First, mechanically dehydrate the sludge with high water content, and mix the dehydrated sludge with a water content of less than 50% and coal powder at a ratio of 1:2 and press briquette coal;

[0029] Secondly, the briquettes are put into the furnace from the feeding port on the top of the two-stage gasification furnace. Since the high-temperature reduction gas generated at the bottom of the gasification furnace rises as a heat carrier and passes through the stacked briquettes, the briquettes are dried and dehydrated in the drying layer. Moreover, due to the airtightness of the furnace, the briquettes in the retort layer can be retorted in an oxygen-free state at 400°C to 550°C to form semi-coked briquettes and retort gas, which contains more toxic and harmful substances. Water vapor is mixed with a temperature...

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Abstract

The invention discloses a two-section sludge gas-generating treatment method and a two-section sludge gas-generating treatment device. The treatment device includes a sludge dewatering unit, a coal briquette manufacturing module and a sludge combustion treatment unit. In the invention, dewatered sludge is mixed with pulverized coal to manufacture coal briquettes and the coal briquettes are subjected to high-temperature pyrolysis in a two-section gas-generating furnace so that reduced coal gas can be produced through combustion of the sludge fully. Meanwhile, the coal briquettes are subjected to further dehydration and drying and anaerobic destructive distillation through high-temperature reduced coal gas. Destructive-distilled coal gas generated in the destructive distillation process is fed into the gas-generating furnace again for being used in combustion so that toxic and harmful substances in the destructive-distilled coal gas are completely eliminated. Meanwhile, harmful metal elements, such as copper, zinc, lead, chromium, arsenic and the like, which are not easy to deform, in the sludge enter into fused ash residue and are solidified after temperature decreasing, thereby satisfying a requirement of safe treatment.

Description

technical field [0001] The invention relates to a sludge treatment method, in particular to an energy-saving and environment-friendly two-stage sludge gasification treatment method and a treatment device. Background technique [0002] Sludge, especially printing and dyeing sludge or papermaking sludge, contains a large amount of natural and man-made fibers, dyes, oil, dust, etc. In a dry state, each kilogram of sludge contains 3000 kcal of heat energy, which can be used as fuel. For example, the application publication number is CN103666504, and the Chinese invention patent titled sludge drying, pyrolysis, gasification and incineration integrated treatment system discloses an integrated treatment system for sludge drying, pyrolysis, gasification and incineration, including a combustion system and a drying system. , pyrolysis gasification system and flue gas purification system. The flue gas generated by sludge combustion pyrolysis gasification is processed through the purifi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C10J3/60C10J3/82C10B53/00C10B57/10
Inventor 郭心锦江景景程侃
Owner ZHEJIANG DEQIAN ENERGY SAVING TECH
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