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Compound type sludge fuel and preparation method thereof

A composite, sludge technology, applied in the chemical industry, can solve the problems of unstable water content of sludge, asynchronous combustion time, mixed combustion of sludge, etc., and achieve the effects of stable calorific value, easy storage and easy combustion.

Inactive Publication Date: 2010-11-10
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although sludge incineration has made great progress, due to the unstable moisture content of sludge, low density and low calorific value (the calorific value of dry sludge is about 8000-12000KJ / Kg, which is lower than lignite calorific value), Single incineration has problems such as not easy to catch fire, unstable combustion, and easy to coke. Even if it is directly mixed with other high-calorific value fuels, there are also problems such as asynchronous combustion time, large combustion fluctuations, and easy coking that affects normal operation.
Regardless of whether sludge is incinerated alone or mixed with other fuels, there are certain problems.

Method used

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  • Compound type sludge fuel and preparation method thereof
  • Compound type sludge fuel and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Single sludge fuel (without adding other components) is prepared. First, dehydrate the sludge with water content to 15%, then extrude it on the molding equipment, and then dry it naturally to obtain the single sludge fuel.

[0024] Weigh 100g of 1# single sludge fuel and put it into a fixed bed incinerator for incineration. After complete incineration, the mass of the residue is weighed, and the content of main heavy metal ions in the residue is determined by inductively coupled plasma atomic emission spectrometry. In addition, an appropriate amount of single sludge sample was taken to determine the calorific value by oxygen bomb combustion method. The specific results are shown in Table 1, Table 2 and Table 3, respectively. Table 1 is the calorific value table of different sludge fuels; Table 2 is the residue content table after combustion of different sludge fuels; Table 3 is the main heavy metal ion content table in the residue after combustion of different sludge f...

Embodiment 2

[0026] The present embodiment adopts the raw material of following weight percent: 30% dried sludge; 40% pulverized coal; 10% residual oil; 10% wood powder (biomass); 7% clay; 3% CaO prepares composite sludge fuel ( 1# composite sludge fuel). First take 30% hydrous sludge based on dry sludge weight, dehydrate the hydrous sludge to 55%, then add 40% coal powder; 10% residual oil; 10% wood flour (biomass); 7% clay and 3% CaO; mixed and stirred evenly, extruded on the molding equipment, and then dried naturally to obtain the composite sludge fuel product.

[0027] Weigh 100g of 1# composite sludge fuel and put it into a fixed bed incinerator for incineration. After complete incineration, the mass of the residue is weighed, and the content of main heavy metal ions in the residue is determined by inductively coupled plasma atomic emission spectrometry. In addition, an appropriate amount of sludge samples were taken to determine the calorific value by the oxygen bomb combustion met...

Embodiment 3

[0029] The present embodiment adopts the raw material of following weight percent: 20% dried sludge; 50% pulverized coal; 20% residual oil; 4% wood flour (biomass); 5% clay; 1% CaO prepares composite sludge fuel ( 2# composite sludge fuel). First take 20% water-containing sludge based on dry sludge weight, dehydrate the water-containing sludge to 45%, then add 50% coal powder, 20% residual oil, 4% wood powder (biomass), and 5% clay and 1% CaO, mixed and stirred evenly, extruded on the molding equipment, and then dried in the sun to obtain a composite sludge fuel product.

[0030] Weigh 100g of 2# composite sludge fuel and put it into a fixed bed incinerator for incineration, weigh the residue after complete incineration, and measure the main heavy metal ion content in the residue by inductively coupled plasma atomic emission spectrometry. In addition, an appropriate amount of sludge samples were taken to determine the calorific value by the oxygen bomb combustion method. The...

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Abstract

The invention discloses a compound type sludge fuel, which comprises the following raw materials in percentage by weight: 20-50% of dry sludge, 20-50% of coal dust, 10-20% of residual oil, 5-10% of clay and 4-10% of biomass. The invention also discloses a preparation method of the compound type sludge fuel. Compared with a single dry sludge formed solid, the compound type sludge fuel increases the heat value by 1 time, and is easier to burn; and the curing rate is increased by 5-10%.

Description

technical field [0001] The invention relates to a composite sludge fuel and a preparation method thereof, which is mainly used in resource utilization of sludge and belongs to the technical field of chemical industry. Background technique [0002] With the rapid development of my country's national economy and the continuous expansion of urban population, the discharge of urban sewage has increased rapidly, and at the same time, it has also been accompanied by a large increase in the sludge output of sewage treatment plants. Sludge not only contains a large amount of organic matter that is easy to rot and smell, but also contains a large number of pathogens harmful to the environment such as Escherichia coli and roundworm eggs, and heavy metal ions that are easy to accumulate and cause great harm to varying degrees. If the sludge is not treated rationally, but randomly piled up, it will definitely cause new environmental pollution problems. [0003] At present, sludge treat...

Claims

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Application Information

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IPC IPC(8): C10L5/46C10L5/04C10L5/10
CPCY02E50/30Y02E50/10
Inventor 令狐文生
Owner SHAOXING UNIVERSITY
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