Method for forecasting ash fusion point variation trend after coal and sludge combined firing

A technology of changing trends and mixed combustion, which is applied in the direction of chemical analysis, instruments, and calculations by means of combustion. It can solve problems that affect the combustion effect of boiler life, difficult to predict ash melting characteristics, and boiler slagging, so as to achieve less quality and shorter prediction period. Short, less work-intensive effect
CN104569283AInactive Publication Date: 2015-04-29HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Publication Date
2015-04-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for forecasting the ash fusion point variation trend after coal and sludge combined firing. The method comprises the following steps: (1) drying a coal and sludge mixed sample, splitting, grinding, screening the processed mixed sample with a sieve, and drying the mixed sample powder passing through the sieve; (2) preparing an ash sample by adopting a rapid ashing method; (3) performing ash composition analysis on the ash sample, and detecting the species and the contents of mineral constituents; (4) selecting three mineral constituents with the maximum content and selecting corresponding ternary phase diagrams; (5) labeling points on which coal and sludge are located on the ternary phase diagrams and connecting the points on which the coal and the sludge are located into a line; and (6) obtaining the ash fusion point variation trend along with the content of the sludge in the mixed sample. The method can be used for quickly and effectively forecasting the ash fusion point variation trend of the coal and sludge mixed sample along with the content of the sludge to bring convenience for efficiently determining the species of the coal and the sludge in the coal and sludge mixed sample and the ash fusion property variations probably caused after the coal is mixed with the sludge in the initial stage.
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Description

technical field

[0001] The invention belongs to the technical field of sludge treatment, and more specifically relates to a method for predicting the change trend of ash melting point after coal and sludge are mixed and burned. Background technique

[0002] With the acceleration of China's urbanization process, the rate of urban sewage treatment has increased year by year, and the sludge output of urban sewage treatment plants has also increased sharply. After sludge without proper treatment enters the environment, it will cause secondary pollution to water bodies and the atmosphere. It not only reduces the effective treatment capacity of the sewage treatment system, but also poses a serious threat to the ecological environment and human activities.

[0003] Currently, sludge disposal methods mainly include sea discharge, landfill, agricultural use, and incineration. Due to the advantages of reduction, harmlessness and resource utilization, the incineration method will cont...

Claims

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