Fluxing agent for reducing melting point of coal ash

A technology of flux and coal ash, which is applied in the direction of fuel additives, petroleum industry, solid fuel, etc., can solve the problems of difficult gasification coal, high melting point of coal ash, and high processing cost, so as to promote the formation of eutectic system and improve High-temperature fluidity, the effect of accelerating the mass transfer effect

Inactive Publication Date: 2020-08-14
绍兴凤登环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, using limestone as a coal ash flux has the disadvantages of adding a large amount and not being suitable for extremely high coal ash melting points
[0007] CN1970698A has reported the use of CaCO 3 , Fe 2 o 3 , MgCO 3 Three-component fluxes have achieved certain results, but compared with pure limestone fluxes, Fe 2 o 3 powder and MgCO 3 The cost is relatively high, and the sulfur content in the raw materials is required to be low, an

Method used

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  • Fluxing agent for reducing melting point of coal ash

Examples

Experimental program
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Example Embodiment

[0027] Example 1

[0028] The CaO powder, MgO powder, Fe 2 O 3 Powder, Na 2 O powder, K 2 The O powder is thoroughly mixed and grinded to the fineness of 60 mesh sieve, and then mixed with organic hazardous waste (the organic hazardous waste is the residue produced by the regeneration of the washing oil during the gas purification process, and the residue is the reorganization with a boiling point greater than 280℃ under normal pressure. Points, the kinematic viscosity is greater than 8mm at 40℃ 2 / s, the calorific value is 34000kJ / kg), and the powder flux is obtained by grinding to pass a 20-mesh sieve.

[0029] The flux contains active ingredients according to mass percentage:

Example Embodiment

[0030] Example 1-1

[0031] In the process of gas purification, the amount of residue generated by the regeneration of washing oil is 40%, CaO is 20%, MgO is 10%, Fe 2 O 3 26%, Na 2 O is 2%, K 2 O is 2%.

Example Embodiment

[0032] Example 1-2

[0033] In the process of gas purification, the amount of residue generated by the regeneration of washing oil is 60%, CaO is 10%, MgO is 5%, Fe 2 O 3 21%, Na 2 O is 2%, K 2 O is 2%.

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Abstract

The invention discloses a fluxing agent for reducing the melting point of coal ash. The fluxing agent is composed of the following components in percentage by weight: 20-90% of organic matter, 0-70% of CaO, 1-40% of MgO, 0-50% of Fe2O3, 0-30% of Na2O and 0-30% of K2O. The fluxing agent effectively increases the amount of a liquid phase generated by ash fusing, and improves the high-temperature fluidity of ash slag; the softening point is low, and the formation of an eutectic system can be promoted; the ash melting point can be reduced, and meanwhile, organic hazardous wastes are used for producing H2/CO and the like to save feed coal; organic matters are used as a binder and a water repellent agent, so that the addition amount of the ash melting point reducing additive can be greatly higher than that of other ash melting point reducing additives, and the yield of effective gas is not influenced; the phenomenon that the addition amount of limestone is increased and the melting point ofcoal ash is increased is avoided. The fluxing agent solves the problems of high coal ash melting point, high treatment cost and the like of difficult-to-gasify coal (such as Huainan coal) with high ash melting point.

Description

technical field [0001] The invention relates to the technical field of liquid slag removal, in particular to a flux for lowering the melting point of coal ash. Background technique [0002] In order to reduce the negative impact of coal on the environment, the development of clean coal technology is an important way to improve coal utilization efficiency and reduce environmental pollution. It includes gasification technology, synthetic fuel technology, including alcohol fuel and hydrocarbon fuel, etc. In these technologies, whether the ash and slag can be discharged smoothly is the key to the smooth operation of the device. Coal gasification devices represented by Shell pulverized coal gasification and Texaco coal-water slurry pressurized gasification all adopt liquid slag removal technology, which has certain requirements on the melting point of coal ash. Liquid slag discharge requires that the coal ash melting temperature is lower than the operating temperature, and the ...

Claims

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Application Information

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IPC IPC(8): C10L9/10C10L10/00
CPCC10L9/10C10L10/00
Inventor 王明霞章磊季根忠张浙锦潘时俊王浩祥
Owner 绍兴凤登环保有限公司
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