Novel mixed-fuel calcination limekiln

A technology of mixed fuel and lime kiln, which is applied in the direction of lime production, etc., can solve problems such as unreasonable energy utilization, and achieve the effects of easy energy-saving product impurities, fast firing speed, and improved uniform and balanced combustion

Inactive Publication Date: 2013-10-23
刘丽颖 +1
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AI Technical Summary

Problems solved by technology

Gas-fired energy-saving mechanical vertical kiln, the cooling zone is sealed, and the heat is dissipated by the kiln wall. The air in the mixed gas is cold air, and the energy utilization is unreasonable. Not many rotary kilns are equipped with cooling zone heat recovery systems, and there are also unreasonable energy utilization. question

Method used

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  • Novel mixed-fuel calcination limekiln

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, step 1 starts the induced draft fan (19), so that the new mixed fuel calcined lime kiln (1) gradually forms a negative pressure.

[0022] Step 2 After setting the open flame at the ignition port of the gas burner (35.36), turn on the air distribution fan (41), the air passes through the air interface flange (39.40) of the gas burner (35.36), and then turn on the gas generator (42) The water seal switch, the gas enters the gas burner (35.36) to burn through the gas interface flange (37.38), forming a calcination zone (33).

[0023] Step 3. As time goes by, the temperature of the new mixed fuel calcined lime kiln (1) gradually increases, and the surface of the ore begins to decompose. The combustion exhaust gas and the carbon dioxide produced by the decomposition of the ore squeeze the air in the kiln and pass through the exhaust gas collection box (13.14) , tail gas pipeline (15), bag filter (16), connecting pipe (17) and wet desulfurization tower (18) are ...

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Abstract

At present, in China, the existing methods for producing quicklime by sedimentary rock calcination mainly adopt a coal-fired energy-saving machinery shaft kiln, a gas-fired energy-saving machinery shaft kiln, a coal-fired (powder-injection) rotary kiln and a gas-fired rotary kiln. The existing methods have limitation. The invention provides a novel mixed-fuel calcination limekiln. The novel mixed-fuel calcination limekiln can produce quicklime simultaneously by gas and coal calcination of sedimentary rock. The novel mixed-fuel calcination limekiln has the advantages of manufacture easiness, air distribution reasonability, combustion easiness, advantage and disadvantage complementation, and energy-saving easiness. The novel mixed-fuel calcination limekiln provides a novel and feasible scheme for energy saving, environmental protection, production cost reduction and product quality improvement of sedimentary rock calcination-based production of quicklime at home and abroad.

Description

technical field [0001] The invention relates to an industrial kiln for calcining sedimentary rocks to produce quicklime, in particular to a novel mixed-fuel calcining lime kiln for producing quicklime by simultaneously using gas and coal to calcinate sedimentary rocks. Background technique [0002] At present, the methods of calcining sedimentary rocks to produce quicklime mainly include coal-fired energy-saving mechanical shaft kilns, gas-fired energy-saving mechanical shaft kilns, coal-fired (powder spraying) rotary kilns and gas-fired rotary kilns. Among them, the coal-fired energy-saving mechanical shaft kiln is the most widely used. The difference between the gas-fired energy-saving mechanical shaft kiln and the coal-fired energy-saving mechanical shaft kiln is that the calcination zone of the gas-fired energy-saving mechanical shaft kiln is to use the gas burner to inject the mixed gas (air-gas) into the position of the calcination zone and ignite it continuously. Aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B2/10
CPCY02P40/40
Inventor 刘丽颖
Owner 刘丽颖
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