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Method for preparing high calorific value fuel from municipal sludge and biomass synergistically

A technology of biomass fuel and municipal sludge, which is applied in the field of municipal sludge synergizing biomass to prepare high calorific value fuel, can solve the problems of high cost, poor effect and long processing time, achieve high water content and reduce secondary pollution , the effect of increasing the calorific value

Inactive Publication Date: 2018-11-06
南京师范大学镇江创新发展研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing high calorific value fuels from municipal sludge and biomass, so as to solve the problems of high cost, long processing time and poor effect in the prior art

Method used

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  • Method for preparing high calorific value fuel from municipal sludge and biomass synergistically

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Experimental program
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Effect test

Embodiment 1

[0021] A method for preparing high calorific value fuel from municipal sludge with biomass, comprising the following steps:

[0022] The moisture content of the garden waste is 38%, and it is crushed in situ. After crushing, the sawdust particles are 3mm. The urban landscaping waste is crushed, packaged, and directly transported to the sewage treatment plant by car, and dried in the sludge conditioning tank according to the sawdust and sludge. The basis weight is 1:1 mass percentage, and at the same time add 3 / 10,000 of the dry basis sludge and cationic PAM to stir evenly, then perform ordinary plate and frame mechanical dehydration, and the moisture content of the sludge is 58%; the compressed multi-stage heat energy is used to recover the air source heat pump sewage The mud drying complete set, the dehumidification capacity of a single air source heat pump is 240kg / h, 1kwh electric energy can dry and evaporate 3.0kg, the wet mud is deeply dried to a moisture content of 15%, t...

Embodiment 2

[0024] The moisture content of the garden waste is 40%, and it is crushed in situ. After crushing, the sawdust particles are 4mm. The urban landscaping waste is crushed, packaged, and directly transported to the sewage treatment plant by car, and dried according to the sawdust and sludge in the sludge conditioning tank. The basis weight is 1:1 mass percentage, at the same time add 5 / 10,000 dry base sludge and cationic PAM and stir evenly, then carry out ordinary plate and frame mechanical dehydration, the sludge moisture content is 54%; adopt compressed multi-stage heat energy to recover air source heat pump sewage Complete set of mud drying equipment, single air source heat pump dehumidification capacity 260kg / h, 1kwh electric energy can dry and evaporate 3.2kg, wet mud can be deeply dried to moisture content 15%, comprehensive power consumption 170kw.h, moisture content 15% sludge addition Additives, wherein the sulfur-fixing agent is added in an amount of 1.5% of the sludge ...

Embodiment 3

[0026] Utilize described in embodiment 1, comprise the following steps:

[0027] The water content of the garden waste is 35%, and it is crushed in situ. After crushing, the sawdust particles are 5mm. The urban landscaping waste is crushed, packaged, and directly transported by car to the sewage treatment plant. The basis weight is 1:1 mass percentage, and at the same time add 7 / 10,000 dry base sludge and cationic PAM to stir evenly, then perform ordinary plate and frame mechanical dehydration, and the moisture content of the sludge is 54%; the compressed multi-stage heat energy is used to recover the air source heat pump sewage The mud drying complete set, the dehumidification capacity of a single air source heat pump is 280kg / h, 1kwh of electric energy can dry and evaporate 3.5kg, and the wet mud is deeply dried to a moisture content of 13%, the comprehensive power consumption is 160kw.h, and the moisture content is 15%. Sludge addition Additives, wherein the sulfur-fixing a...

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Abstract

The invention discloses a method for preparing high calorific value fuel from municipal sludge and biomass synergistically. The method comprises the following steps: pumping municipal biochemical sludge into a conditioning tank, adding gardening wastes and cationic PAM (polyacrylamide) for conditioning, carrying out mechanical dewatering till a water content of 60%, further deeply drying the sludge by a multi-stage heat recycling air source heat pump till a water content of 15%, and putting additives into the sludge, pelletizing, thereby obtaining the high calorific value biomass fuel. Compared with the prior art, the method has the advantages that gardening greening crushed twigs and macromolecule environmentally-friendly type materials are adopted as swelling agents and conditioning agents, the cost of common chemical conditioning is reduced, secondary pollution is reduced, novel ways are provided for gardening wastes, sludge is deeply dried at a low temperature by the multi-stage heat recycling air source heat pump, the targets of energy recycling and 'treating waste with waste' are achieved, the energy is saved, the efficiency is improved, the sludge treatment cost is reduced,secondary pollution is reduced, and waste recycling and combination of social, economic and environment benefits in an environment treatment process are achieved.

Description

technical field [0001] The invention belongs to the field of solid waste treatment, and in particular relates to a method for preparing high calorific value fuel from municipal sludge and biomass. Background technique [0002] At present, the main methods of sludge treatment and disposal are landfill, incineration and composting, but these methods have obvious defects. Sludge landfill is a waste of land resources, and landfill leachate is likely to pollute groundwater sources. Although sludge incineration can reduce capacity and volume to the greatest extent, there are problems such as high treatment costs and difficult disposal of residues after incineration. Sludge composting has the advantages of low energy consumption and recyclable nutrients in sludge, but it has the potential danger of pathogenic bacteria spreading and heavy metal pollution. In view of this, seeking a new sludge treatment method that is economical and reasonable and compatible with the development of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/44C10L5/46C10L9/10C10L10/00C02F11/12C02F11/14
CPCC02F11/12C02F11/122C02F11/14C10L5/442C10L5/46C10L9/10C10L10/00C10L2200/029Y02B30/52Y02E50/10Y02E50/30
Inventor 边博
Owner 南京师范大学镇江创新发展研究院
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