Mineral additive blend compositions and methods for operating combustors for avoiding problems such as agglomeration, deposition, corrosion and reducing emissions

A technology of mineral additives, operation methods, applied in the direction of combustion methods, fuel additives, combustion types, etc., can solve problems such as accumulation

Active Publication Date: 2014-10-22
KENTUCKY TENNESSEE CLAY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkali compounds can cause ash particles to stick together, leading to undesirable ash accumulation (eg, on boiler tubes) and fouling of reactor system surfaces

Method used

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  • Mineral additive blend compositions and methods for operating combustors for avoiding problems such as agglomeration, deposition, corrosion and reducing emissions
  • Mineral additive blend compositions and methods for operating combustors for avoiding problems such as agglomeration, deposition, corrosion and reducing emissions
  • Mineral additive blend compositions and methods for operating combustors for avoiding problems such as agglomeration, deposition, corrosion and reducing emissions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～8

[0353] Eight example tests were carried out for the compositions described in Table 1 . Comparative Example 1 (hereinafter, Example 1) was carried out with straw alone. For Examples 2-8, 2.25% by weight of the additive was combined with 97.75% by weight straw. 1.8% by weight corresponds to 80% of the additive portion, 0.9% by weight corresponds to 40% of the additive portion and 0.45% by weight accounts for 20% of the additive portion.

[0354] Each additive was analyzed before starting the experiments of the examples. Chemical analyzes were performed at a temperature of 1200°C with an S4 detector X-ray fluorescence device from Bruker (including a technique to form fused transparent buttons of pre-dried sample material). The results of these analyzes are shown in Table 2. The loss on ignition (LOI), also shown in Table 2, was measured by leaving the samples at 1050°C overnight.

[0355] Values ​​for C and S content (shown in Table 3) were obtained using a LECO C,S analyzer...

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Abstract

Mineral additive blend compositions and a method for operating a furnace are provided in order to avoid combustion problems such as agglomeration, deposition, corrosion and reducing emissions. A method for operating a furnace, such as a fluidized bed reactor, pulverized-fuel combustor, grate combustor includes introducing fuel and a mineral additive blend comprising a clay and a functional mineral into the furnace. The method further includes heating at least a portion of the inorganic compound-containing material and clay, such that at least a portion of the clay is at least partially calcined and the at least partially calcined clay and functional mineral adsorbs at least a portion of the inorganic volatile compounds present in the furnace and react with the ash produced during fuel combustion increasing its refractoriness. The method further includes removing at least a portion of the at least partially calcined clay and adsorbed inorganic compounds from the furnace.

Description

technical field [0001] The present invention relates to mineral additive blend compositions and methods of operating furnaces, and more particularly to making furnaces, such as fluidized bed reactors, pulverized fuel burners, or grate burners, by introducing mineral admixtures into the furnace. A method of operation with the aim of avoiding combustion problems such as slagging, agglomeration, deposition, corrosion (eg, fouling) and reducing emissions. Background technique [0002] Combustion processes can be used in power plant furnaces to generate heat to run boilers or steam generators that produce electricity. Fuels for such processes may include coal, petroleum coke, biofuels from biomass, and / or solid waste. Fuels may include inorganic volatiles such as alkalis, alkaline earths, chlorine, fluorine, sulfur, and metals. [0003] Thermal power plants that burn fossil fuels, such as coal-fired facilities used in the electricity industry, operate by burning fuel in furnace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10C10L10/02C10L10/06F23J7/00
CPCC10L10/04F23K2401/10C10L10/06C10L2200/0218C10L2290/28F23J7/00C10L2200/029C10L2200/0222F23G2201/701C10L2200/0213F23K2301/103C10L10/02F23K2201/505C10L9/10C10L2270/04C10L2230/02C10L2250/06F23K2300/103F23K2400/10Y02E50/10Y02E50/30C10L2200/0209C10L2200/0268
Inventor T·E·兰登J·D·奥斯比C·拉瓦尼亚尼M·佩罗内
Owner KENTUCKY TENNESSEE CLAY
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