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Sludge or organic garbage high-low temperature coupling themolysis method

An organic waste, high and low temperature technology, which is applied in the directions of organic fertilizer, pyrolysis treatment sludge, sewage/sludge fertilizer, etc. problems, to achieve the effect of saving equipment investment, saving energy, and reducing requirements

Inactive Publication Date: 2010-05-19
SHANGHAI DISHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the composition and pore structure of soil amendments required by different soils, a single high-temperature gasification or low-temperature cracking cannot produce bio-organic carbon that meets different needs; in addition, a single high-temperature gasification and low-temperature cracking cannot simultaneously process different properties and Sludge with heavy metal content and organic domestic waste

Method used

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  • Sludge or organic garbage high-low temperature coupling themolysis method
  • Sludge or organic garbage high-low temperature coupling themolysis method
  • Sludge or organic garbage high-low temperature coupling themolysis method

Examples

Experimental program
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Effect test

example 1

[0035] The daily output of a municipal sludge plant in a southern city is 300t / d, the calorific value on a dry basis is 18200KJ / kg, the initial water content is 80%, the ash content on a dry basis is 45%, and the carbon content on a dry basis is 36%. Harmful substances and heavy metals The content meets the requirements of urban sewage treatment plant sludge disposal-agricultural mud (CJ / T309-2009), and mineral oil and benzo(α)pyrene were not detected. There are abundant straws waiting to be processed locally, and the most commonly used fertilizers in the area are potassium and nitrogen fertilizers.

[0036] In the first step, the wet sludge with a moisture content of 80% is first sent to the low-temperature drying and cracking furnace 3 for cracking to obtain partially carbonized biological fertilizer. stay for 6 minutes; the gas produced by cracking is sent to the first condenser 6 for condensation, the condensed tar is sent to the regulating liquid storage tank 7, and the u...

example 2

[0041] The daily output of municipal sludge in a northwestern city is 250t / d, and the analysis data is as follows:

[0042]

[0043]

[0044] The data in the above table shows that the content of heavy metal Cu does not meet the requirements of grade A sludge of urban sewage treatment plant sludge disposal - agricultural mud (CJ / T309-2009), but meets the requirements of grade B sludge. In addition, mineral oil and benzo (α)pyrene was not detected.

[0045]In the first step, the sludge with a moisture content of 79% is sent to the low-temperature drying and cracking furnace 3 for drying and cracking to obtain partially carbonized biological fertilizers. The drying and cracking temperature is 150°C and the time is about 90 minutes; The first condenser 6 condenses, and the condensed tar is sent to the regulating liquid storage tank 7, and the uncondensed gas is sent to the deodorization device 10 and sent to the chimney 14 for discharge through the induced draft fan 12; the...

example 3

[0048] The daily output of municipal sludge in a northwestern city is 200t / d, and the properties of the sludge are the same as in Example 2. At the same time, local residents collect cattle, sheep and horse manure to pile up randomly, and fertilize or use it as fuel after drying.

[0049] When using the method of the present invention to process, in the first step, the sludge with a moisture content of 79% and the newly collected cattle, sheep and horse manure with a moisture content below 80% are sent to the low-temperature drying and cracking furnace 3 for drying and cracking to obtain partially charred manure. For biological fertilizers, the drying and cracking temperature is 150°C, and the time is about 90 minutes; the gas generated by cracking is sent to the first condenser 6 for condensation, the condensed tar is sent to the regulating liquid storage tank 7, and the uncondensed gas is sent to the deodorization device 10 Sent to the chimney 14 for discharge through the ind...

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Abstract

The invention provides a sludge or organic garbage high-low temperature coupling themolysis method which is characterized in that: the method comprises the following steps: step I: the sludge or organic garbage is fed in a low temperature drying depolymerizing furnace; material with partial carbonization is used as raw material of soil organic fertilizer; step II: the material with partial carbonization, generated in pyrolysis, is fed into a middle temperature carbonizing furnace for carrying out carbonization; the obtained bio-organic carbon is used as raw material of soil organic fertilizer or soil conditioner; step III: the material with partial carbonization, bio-organic carbon and one or more than two mixtures of the sludge, straws or organic garbage are fed in a high-temperature pyrolysis furnace for gasification; step IV: fixed carbon remained in a high-temperature depolymerizing furnace after aerogenesis is fed in a high-temperature sub-fusion activated device, and then oxygen-enriched air enters in, and then liquid in a regulating solution storage tank is prayed in for regulation, and then, compound charcoal is obtained after being cooled. The method has high efficiency, simple steps and diversified products.

Description

technical field [0001] The invention relates to a high-low temperature coupled pyrolysis method for sludge or organic waste, and belongs to the technical field of municipal waste treatment and resource recycling. Background technique [0002] A large amount of sludge produced in the process of wastewater treatment by urban sewage treatment plants, river bottom sludge produced by river cleaning, etc., all contain a large amount of water (80-90%) and organic matter, as well as heavy metals and pathogenic bacteria; in addition, urban garbage The organic components have high moisture content (≥70%) and low calorific value, and landfills will produce a large amount of leachate, and incineration will consume auxiliary fuel or reduce the amount of electricity generated per ton of waste. With the improvement of my country's sewage treatment network, the output of sludge is increasing day by day, and it has become the most urgent and most urgent urban waste in parallel with urban was...

Claims

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Application Information

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IPC IPC(8): C02F11/10C05F9/00C05F7/00C10L5/46C10C1/00C09K17/00
CPCC09K17/00Y02E50/30Y02E50/10Y02W10/37
Inventor 杭鹏志陈德珍
Owner SHANGHAI DISHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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