Calcium-based catalytic desulfurization agent for cement kiln

A catalytic desulfurization and cement kiln technology, applied in fuel additives, petroleum industry, solid fuels, etc., can solve problems such as excessive emission concentration, reduce pollution, ensure high-temperature sulfur fixation, and solve the effect of energy crisis

Active Publication Date: 2016-07-20
广东万引科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the limitation of limestone area and the reduction of grade, some cement plants have to use high-sulfur limestone with a sulfur content ran

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: Calcium-based (Ca(OH) 2 ) 50%, Calcium Oxide 44%, Iron Oxide 0.5%, Magnesium Oxide 1.0%, Barium Carbonate 1.5%, Rare Element Compounds 3%, among the rare element compounds: Manganese Dioxide 78%, Titanium Dioxide 16%, Cerium Dioxide 2%, Lithium Hydroxide 2%, Vanadium Pentoxide 2%, the above-mentioned components are mass percentages. The sum of the mass percentages of each component after mixing is 100%.

[0027] The mixture is further processed and ground into a powder material, and fully mixed under the mixer to obtain a dry desulfurizer powder. The mass percentage of the amount of desulfurization agent added and the blending amount of cement raw meal is 0.5%.

[0028] This embodiment is used on the B line of the 5000t / d new dry process cement production line of Everbright Cement Longhua Plant. During the stoppage of the vertical mill, SO 2 The actual monitoring result of the concentration is 3600mg / Nm 3 , after adding the desulfurizer for 10 minutes,...

Embodiment 2

[0029] Embodiment 2: Calcium-based (Ca(OH) 2 ) 52%, calcium oxide 40%, iron oxide 1%, magnesium oxide 1%, barium carbonate 2.5%, rare element compound 3.5%, among the rare element compound: manganese dioxide 75%, titanium dioxide 20%, cerium oxide 2%, Lithium Hydroxide 1%, Vanadium Pentoxide 2%, the above-mentioned components are mass percentages. The sum of the mass percentages of each component after mixing is 100%.

[0030] The mixture is further processed and ground into a powder material, and fully mixed under the mixer to obtain a dry desulfurizer powder. The mass percentage of the amount of desulfurization agent added and the blending amount of cement raw meal is 0.2%.

[0031] This embodiment is used on line A of the 5000t / d new dry-process cement production line of Everbright Cement Longhua Plant. During the opening of the vertical mill, SO 2 The actual monitoring result of concentration is 1800mg / Nm 3 , after adding the desulfurizer for 10 minutes, the SO in the ...

Embodiment 3

[0032] Embodiment 3: Calcium-based (Ca(OH) 2 ) 53%, calcium oxide 39%, iron oxide 0.5%, magnesium oxide 1.5%, barium carbonate 2%, rare element compound 4%, among which rare element compound: manganese dioxide 76%, titanium dioxide 18%, cerium oxide 2%, Lithium Hydroxide 1%, Vanadium Pentoxide 3%, the above-mentioned components are all percentages by mass. The sum of the mass percentages of each component after mixing is 100%.

[0033] The mixture is further processed and ground into a powder material, and fully mixed under the mixer to obtain a dry desulfurizer powder. The mass percentage of the amount of desulfurization agent added and the blending amount of cement raw meal is 0.3%.

[0034] This embodiment is used on the C line of the 5000t / d new dry process cement production line of Everbright Cement Longhua Plant, and the desulfurization effect is obvious. 2 The actual monitoring result of concentration is 2105mg / Nm 3 , after adding the desulfurizer for 10 minutes, the ...

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PUM

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Abstract

The invention discloses a calcium-based catalytic desulfurization agent for a cement kiln.The calcium-based catalytic desulfurization agent comprises calcium hydroxide, calcium oxide, iron oxide, magnesium oxide, barium carbonate and a rare element compound, and the desulfurization agent is added into the kiln together with cement raw materials so as to lower the concentration of SO2 generated by flue gas emission of the cement kiln.According to the calcium-based catalytic desulfurization agent, a tiny amount of the calcium-based catalytic desulfurization agent is blended into the raw materials, potential of pulverized coal combustion of the new dry process cement kiln can given fully play, high temperature sulfur fixation of the cement kiln is guaranteed, meanwhile, SO2 emitted into air due to the high sulfur content of the raw materials can be effectively lowered, air pollution is reduced, and in addition, no adverse impact is generated to performance of cement clinker; meanwhile, the calcium-based catalytic desulfurization agent is easy to produce and operate, and great practical significance is achieved for solving the problems of cement industry energy crisis and environmental pollution.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, in particular to a production and use method of a calcium-based catalytic desulfurizer for cement kilns. Background technique [0002] At present, limestone is the main raw material of cement plants, and the sulfur content in limestone used by most cement plants is very low, which will not cause SO 2 exceeding the standard. With the limitation of limestone area and the reduction of grade, some cement plants have to use high-sulfur limestone with a sulfur content ranging from 0.2% to 2.0%, resulting in SO in cement kiln flue gas 2 The emission concentration seriously exceeds the standard (200-4000mg / Nm 3 ). According to relevant national standards "Announcement on the Implementation of Special Emission Limits of Air Pollutants", (Ministry of Environmental Protection Announcement No. 14 in 2012), "Emission Standards for Air Pollutants in the Cement Industry" (GB4915-2013), "Cement...

Claims

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Application Information

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IPC IPC(8): C10L9/10C10L10/00
CPCC10L9/10C10L10/00C10L2230/08Y02A50/20
Inventor 张同生陶从喜刘瑞芝阎旻梅金平贺文良荣新
Owner 广东万引科技股份有限公司
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