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A regulator for adjusting the rheological properties and slagging microstructure of coal ash melt and its application method

A conditioner and microstructure technology, applied in the direction of solid fuel, petroleum industry, fuel, etc., can solve the problems of rough adjustment methods, inability to adjust coal ash slagging ash microstructure, and failure to improve ash slag microstructure, etc., to achieve slagging Better properties, easier control of conditions, and improved ash melting point

Active Publication Date: 2019-08-16
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method only adjusts the ash melting point of the coal ash by improving the elemental composition of the coal ash, but cannot improve the rheological properties of the coal ash molten slurry, nor can it adjust the microstructure of the coal ash slagging ash
Chinese patent application 2006101049877, with CaCO 3 82-93; Fe 2 o 3 2-16, the balance is MgCO 3 Uniformly mixed into coal can change the melting characteristics of ash and slag during the gasification process, reduce the ash melting point, so that the ash and slag can be discharged smoothly in liquid form, but it cannot achieve the improvement of ash melting point and slagging characteristics, and cannot fundamentally Solve the problem
Although this method is low in cost, it cannot precisely adjust the melting point of coal ash, and does not improve the microstructure of ash slag. It can only be a relatively rough adjustment method.

Method used

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  • A regulator for adjusting the rheological properties and slagging microstructure of coal ash melt and its application method
  • A regulator for adjusting the rheological properties and slagging microstructure of coal ash melt and its application method
  • A regulator for adjusting the rheological properties and slagging microstructure of coal ash melt and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) With 20 parts of graded fine sand and 80 parts of graded iron-calcium garnet as raw materials, the auxiliary agent is mixed and prepared;

[0023] (2) Add 1.1 kilograms of additives into 100 kilograms of Pingyi coal (dry base ash content of 11) coal-water slurry with a concentration of 66, fully burn in the burner, collect coal ash and test the rheological properties of the coal ash melt, And carry out with the coal water slurry ash without adding additives;

[0024] Table 1 Temperature and viscosity of Pingyi coal ash melt before and after adding additives

[0025]

Embodiment 2

[0027] (1) With 80 parts of graded fine sand and 20 parts of graded iron-calcium garnet as raw materials, the auxiliary agent is mixed and prepared;

[0028] (2) Add 0.8 kg of additives to 100 kg of Shenhua coal (dry basis ash content: 6) coal-water slurry with a concentration of 63, fully burn in the burner, collect coal ash and test the rheological properties of the coal ash melt;

[0029] Table 2 Temperature and viscosity of Shenhua coal ash melt before and after adding additives

[0030]

Embodiment 3

[0032] (1) Using 60 parts of graded fine sand and 40 parts of graded iron-calcium garnet as raw materials, mixing and preparing auxiliary agents;

[0033] (2) Add 1.2 kg of additives to 100 kg of Shandong coal powder (ash content of 9 on a dry basis), burn fully in the burner at 1400 ° C, collect the coke on the wall of the collector after the end, test its compressive strength and observe its structure.

[0034] Table 3 Temperature and viscosity of Shandong coal ash melt before and after adding additives

[0035]

[0036]

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PUM

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Abstract

The invention relates to a modifier for adjusting coal ash fusant rheological characteristics and a slagging microstructure. Fine grading sand and grading andradite serve as a coal ash fusant rheological modifier and a coal slag microstructure modifier. The modifier for adjusting the coal ash fusant rheological characteristics and the slagging microstructure is characterized by comprising, by weight parts, 100 parts of fine grading sand and 20-400 parts of grading andradite, wherein the fine grading sand comprises 15+ / -3 parts of 1000-mesh fine grading sand, 15+ / -3 parts of 800-mesh fine grading sand, 40+ / -10 parts of 600-mesh fine grading sand and 30+ / -8 parts of 200-mesh fine grading sand. The fine grading sand and grading andradite are used and mixed according to 20:80 to 80:20. During preparation of coal water slurry and coal dust, the modifier is added according to 10-20 of the coal dust proportion.

Description

[0001] 1. Technical field [0002] The invention relates to the field of novel chemical functional materials, in particular to a regulator for improving the rheology of coal ash melt and the microstructure of ash slag. [0003] 2. Background technology [0004] The melt rheological characteristics and slagging characteristics of coal ash are determined by the mineral composition and chemical composition of coal ash, which are related to the stable operation and smooth slagging of gasifiers and boilers using coal. The chemical composition of coal ash can be changed by adding additives to achieve the purpose of regulating the melting characteristics of coal ash, the rheological properties of coal ash and the microstructure of ash. [0005] Chinese patent application 2007100593469 proposes a method for improving the ash melting point by using low melting point coal as raw material and mixing with additives (such as kaolin, quartz sand, etc.). This method only adjusts the ash melt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L9/10
CPCC10L9/10
Inventor 何其慧胡柏星田万成
Owner NANJING UNIV