Tail gas utilization method and tail gas utilization system of rotary lime kiln

A lime rotary kiln and calcium carbide furnace exhaust gas technology, which is applied in the directions of dry gas arrangement, preheating cost, waste heat treatment, etc., can solve the problems of hidden safety hazards, high damage rate, and easy breakage of semi-coke, and achieve environmental protection. Emission reduction, semi-coke Reduced breakage and efficient use of energy

Inactive Publication Date: 2012-09-12
NANJING SUYE CALCIUM IND TECH
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Problems solved by technology

This drying method has the following disadvantages: semi-coke is easily broken, and the damage rate is high, which is not conducive to the production of calcium carbide (broken semi-coke with too small particle size cannot b

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  • Tail gas utilization method and tail gas utilization system of rotary lime kiln
  • Tail gas utilization method and tail gas utilization system of rotary lime kiln
  • Tail gas utilization method and tail gas utilization system of rotary lime kiln

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[0029] See Figure 1-3 As shown in the comprehensive utilization system of calcium carbide furnace tail gas and lime rotary kiln tail gas, the unpurified high temperature calcium carbide furnace tail gas directly enters the shell side of the heat exchanger 1, and is blown into the heat exchange tube side by the blower 2 in the heat exchanger After the heat exchange of the air, the cooled calcium carbide furnace tail gas is pressurized by the gas pressure conveying fan 3 and then sent to the burner 4 of the lime rotary kiln for combustion. The heated combustion air from the heat exchanger is also sent Into the burner 4 to support combustion.

[0030] The tail gas of the lime rotary kiln from the tail smoke chamber 5 of the lime rotary kiln enters the preheater 6 from the lower side of the limestone vertical preheater 6 through the lime rotary kiln tail gas discharge pipe 71, and the limestone entering the preheater 6 is processed After preheating, it exits from the top of the pre...

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Abstract

The invention provides a tail gas utilization system of a rotary lime kiln, which uses tail gas of the rotary lime kiln as a drying medium to dry semi-coke, achieves the effects of waste gas utilization and energy consumption reduction, and reduces the damage rate and the probability of spontaneous combustion of the semi-coke. The system comprises a dust remover and a vertical dryer, wherein the semi-coke is arranged in the vertical dryer; and a tail gas emission pipe of the rotary lime kiln, the vertical dryer and the dust remover are connected in sequence. The invention simultaneously provides a tail gas utilization method of the rotary lime kiln, which comprises the steps that the tail gas of the rotary lime kiln is led into the vertical dryer and directly contact with the semi-coke in the vertical drier, so as to dry the semi-coke; and gas emitted by the vertical dryer is evacuated after dust of the gas is removed by the dust remover.

Description

technical field [0001] The technology relates to a method and a system for utilizing the tail gas of a lime rotary kiln, in particular to a method and a system for comprehensively utilizing the tail gas of a calcium carbide furnace and the tail gas of a lime rotary kiln. Background technique [0002] Calcium carbide furnace tail gas is the tail gas produced in the process of calcium carbide furnace production. There are more than 400 calcium carbide furnaces in China's calcium carbide industry, and the annual output ranks first in the world. However, it has always been a major problem to use the heat energy of the calcium carbide furnace tail gas and to purify and meet the emission standards. The extremely serious pollution has always plagued the healthy development of my country's calcium carbide industry. Due to the special nature of the dust in the tail gas of calcium carbide furnace, the dust particles are fine, the specific surface area is large, the specific gravity is...

Claims

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Application Information

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IPC IPC(8): F27D17/00F26B21/14F27D13/00C01B31/32C01B32/942
Inventor 刘银江杭宁刘宇
Owner NANJING SUYE CALCIUM IND TECH
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