Preparation method of sludge straw biomass fuel

A biomass fuel, straw technology, applied in the direction of biofuel, waste fuel, fuel, etc., to achieve high calorific value and flammability, improve efficiency, reduce the effect of compressibility

Inactive Publication Date: 2010-12-29
卢秉威
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a method for preparing sludge and straw biomass fuel to realize its resource utilization in view of the problems existing in the treatment and disposal of solid waste urban sludge and crop straw

Method used

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  • Preparation method of sludge straw biomass fuel

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Embodiment 1

[0020] The preparation method steps are as follows:

[0021] a, carry out filtration and dehydration, first mix the residual sludge of urban sewage treatment plants with a water content above 96% and granular coal (filter aid) with a particle size of 0.15 to 0.18mm, and the mass ratio of sludge to granular coal is 1: 1-2, and then dewatered by existing vacuum filtration and press filtration technology to obtain dewatered sludge (ie sludge filter cake) with a moisture content of 40-60%. The above-mentioned granular coal can be coal for gasification furnace produced by Inner Mongolia Baotou Shenfu Dongsheng Coal Industry Co., Ltd., and the granular coal obtained after crushing and screening.

[0022] b. Stir and mix the dewatered sludge obtained in step a with the straw powder, the mass ratio of the dewatered sludge to the straw powder is 1:99, and after being granulated by a granulator, the sludge straw biomass fuel is obtained.

[0023] The fuel can be directly burned as a su...

Embodiment 2

[0024] Embodiment two: basically the same as embodiment one, the difference is:

[0025] The mass ratio of dewatered sludge to straw powder in step b is 5:95.

Embodiment 3

[0026] Embodiment three: basically the same as embodiment one, the difference is:

[0027] The mass ratio of dewatered sludge to straw powder in step b is 10:90.

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Abstract

The invention provides a preparation method of a sludge straw biomass fuel, which comprises the following steps: firstly mixing the excess sludge with the moisture content more than 96% from a municipal wastewater treatment plant with particle coal with the particle size of 0.15-0.18mm based on the mass ratio of 1:1-2; then filtering and dehydrating to obtain dewatered sludge with the moisture content of 40-60%; smashing the crop straws into crop powers to mix with the dewatered sludge based on the mass ratio of 1-10:90-99; and prilling and molding by a comminutor to prepare the sludge straw biomass fuel. The fuel can be used as an alternative fuel of the coal to directly be burnt for heat supply, is free of black smoke in the burning process, and can be applied in boilers or daily life cookware. The invention sufficiently utilizes the higher calorific value of the municipal sludge and the crop straws, realizes resource utilization of the fuel, and solves the treatment problem of the excess sludge from the municipal wastewater treatment plant and the crop straws.

Description

technical field [0001] The invention belongs to a method for preparing fuel, in particular to a method for preparing sludge straw biomass fuel, in particular to comprehensive utilization of sewage treatment plant sludge and crop straw resources. Background technique [0002] With the acceleration of urbanization and the rapid development of industry, the discharge of domestic sewage and industrial sewage is increasing, so that the amount of sludge generated in sewage treatment is also increasing. It is predicted that the amount of sludge in my country is increasing at a rate of 10-15% per year. If it is calculated once, the annual output of sludge in the country will reach 25-29 million tons by 2010. The way out of sludge is worrying, and the sludge composition Very complex, highly variable, containing a large amount of organic substances, pathogenic organisms, heavy metals, organic matter, nitrogen, phosphorus and other eutrophic elements and other harmful substances, if not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/44
CPCY02E50/30Y02E50/10
Inventor 卢秉威胡筱敏
Owner 卢秉威
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