Production method for producing solid fuel from sludge

Abstract

The invention discloses a production method for producing solid fuel from sludge. The production method comprises the following steps: firstly, conveying sludge into a stirrer through a conveyor, andsequentially adding 10-15% of standard heat-value smokeless coal powder, 1-3% of a deodorant, 2%-5% of a desulfurizer, and conveying the mixture to a sludge bin after stirring and mixing; secondly, leading heated air into the treated sludge, and heating and forming the sludge through a milling slot, and performing parallel mechanical hot-milling cutting to form honeycomb-shaped small particles with diameters of 5mm-10mm; and finally, conveying the small particles into an air drying device to dry, and performing finished product package after drying. The production method reutilizes waste sludge as production solid-state fuel, changes waste into things of value, can treat environmental pollutants, is wide in range of application, is high in practicability, is small in floor space, is low intreatment cost, is strong in cycle economy, and further can protect the environment.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a production method for producing solid fuel from sludge. Background technique [0002] With economic development and social progress, energy conservation and environmental protection have become inevitable and social consensus. Sanitary landfill has requirements for both landfill and landfill sludge, and the amount of sludge to be treated is limited. Sludge production is very large, which is not conducive to sustainable development in the long run. Although the incineration method for sludge disposal has a high degree of reduction and harmlessness, the investment and operation costs are too high. In addition, agricultural use after composting requires a certain amount of technical and capital investment; agricultural use is strictly required, otherwise it will easily cause secondary pollution; bricks made directly from sludge have problems such as low quality of brick ...

AI Technical Summary

Problems solved by technology

Different from adding PAM alone in the traditional chemical conditioning process, in order to ensure the dehydration efficiency, the pre-conditioning of the equipment generally adds inorganic chemicals, such as lime, aluminum salts and iron salts, etc. This technology occupies a large area and has two Secondary pollution, unable to be used later

[0005] 3. Agricultural use of sludge composting. The difficulties of agricultural use after sludge composting are: composting requires certain technical conditions and high cost

When the method of aerobic composting is used, the degradation efficiency of sludge organic matter is higher, the odor gas is less, and the cycle is short. Therefore, most composting engineering systems use aerobic composting. However, this technology occupies a large area and still causes secondary pollution. Cost high

[0006] 4. Sludge incineration, the difficulty of sludge incineration lies in the high investment and cost

6. Sludge bricks; direct use of sludge to form water vapor and take away a lot of heat energy, making the sintering temperature of the kiln unstable, and directly affecting the combustion efficiency of the kiln, resulting in a decline in the yield

The high-temperature gas generated in the combustion chamber generates steam in the waste heat boiler for drying. If the energy is insufficient, fuel can be supplemented in the combustion chamber. The operating cost of this technology is too high, and the market is difficult to accept

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