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Clean fuelization system and fuelization method for urban sludge

A technology of municipal sludge and municipal domestic sludge, which is applied in the clean fuel system of municipal sludge and the field of sludge fuelization

Active Publication Date: 2013-04-03
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies and problems in the existing sludge treatment technology, one of the purposes of the present invention is to provide a clean fuel system for municipal sludge. This system uses a closed circulation system for processing volatile substances. For sludge fuel The residual fly ash after combustion is used to achieve the green and environmentally friendly utilization of green sludge

Method used

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  • Clean fuelization system and fuelization method for urban sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Preparation of sludge briquette (embodiment 1 in the table below)

[0067] 1) Concentrate the sludge produced by the urban sewage treatment plant so that the moisture content is about 83%, and the calorific value of the performance test is 3558kCa / kg;

[0068] 2) The sludge with a moisture content of 83% is mechanically extruded until the sludge moisture content is 50%;

[0069] 3) Crush the sawdust to a particle size of 3mm;

[0070] 4) Mix 100g of sludge with a moisture content of 50%, 10g of filler wood chips, and 1.25g of additive calcium oxide. After uniform mixing, it is prepared into a cylindrical shape by a kneader, and the sludge is dried at 106°C under a pressure of -0.06MPa. The moisture content of the briquettes is 20%, and the drying process adopts a closed circulation system;

[0071] 5) The gas in the drying process is dehydrated, denitrified, desulfurized and deammonized through the gas treatment system, and the distilled water and ammonia water in the...

Embodiment 3

[0076] 1) After the urban sewage treatment plant sludge is concentrated and treated with a water content of about 83%, the calorific value of the performance test is 3558kCa / kg;

[0077] 2) Modified with 15g of municipal domestic sludge and 0.03g of hydrogen peroxide, and left for 15-20min to obtain modified sludge;

[0078] 3) Prepare mixed pulverized coal with long-flame coal in northern Shaanxi with a particle size of 20um and 50um and a mass mixing ratio of 7:3, and add 55g of mixed pulverized coal to the modified sludge;

[0079] 4) According to the mass ratio of 15:1:2:350, add sodium lignosulfonate as a dispersant, a mixture of sodium hydroxide and sodium sulfate as a pH regulator, carboxymethylcellulose as a stabilizer, and water to form an additive mixed solution; in step 3) Add the additive mixed solution of 29.97g in;

[0080] 5) In the reactor, stir at a speed of 1000r / min for 20min to obtain sludge coal-water slurry;

[0081] 6) The gas burned by the sludge coal...

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Abstract

The invention discloses a clean fuelization system and a fuelization method for urban sludge. The system comprises a thickening tank and a sludge testing mechanism, wherein the sludge testing mechanism is connected with a mechanical extruding and drying mechanism or a mixing reactor; the mechanical extruding and drying mechanism is connected with a burning boiler and gas treatment equipment respectively; the mixing reactor is connected with the burning boiler; the burning boiler is connected with the gas treatment equipment, an urban heating system and sludge coal ash treatment equipment respectively; the sludge coal ash treatment equipment is connected with a sludge coal ash testing system; the gas treatment equipment is connected with a condensing device; the condensing device is connected with a denitrification device, a desulfuration device and an ammonia removal device in sequence; and the ammonia removal device is connected with an ammonia water storage tank and the burning boiler respectively. The method comprises the steps of conducting sludge thickening treatment, performance testing, extruding or mixing to obtain a sludge coal briquette or sludge coal water slurry, using the sludge coal ash burnt in the burning boiler to prepare a low molecule flocculating agent or for building materials, and recycling treated gas. According to the system and the method, sludge fuelization is adopted to realize greenness and environmental protection.

Description

technical field [0001] The invention relates to a system and a treatment method for harmlessly systematically treating sludge from an urban sewage treatment plant, in particular to a system and a method for turning urban sludge into clean fuel. Background technique [0002] With the continuous and rapid development of my country's economy and the acceleration of urbanization, the urban water treatment industry has developed rapidly, the number of sewage treatment plants has increased rapidly, and the sewage treatment capacity and treatment rate have increased rapidly, followed by the rapid increase in urban sludge production. Increase. By the end of 2010, the national urban sewage treatment volume reached 34.3 billion cubic meters, and the dewatered sludge production was close to 22 million tons (water content 80%). According to the survey results, 80% of the sludge produced by my country's sewage treatment plants has not been properly treated. The pollution and re-pollution...

Claims

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Application Information

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IPC IPC(8): C10L5/46C10L1/32C10L9/10C10L1/12C10L1/24C10L1/198C10L1/238C10L1/14F23G7/00
CPCY02E50/30Y02E50/10Y02E20/12
Inventor 邵水源昝丽娜庞青涛韩瑾
Owner XIAN UNIV OF SCI & TECH
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