Heating furnace device with combustor

Abstract

The invention relates to a heating furnace device with a combustor, the combustor comprises a premixing chamber of coal gas and combustion-supporting air, and constant-temperature high-temperature hotflue gas provided after the coal gas and the combustion-supporting air are combusted is input into a lime kiln to be calcined. According to the device, blast furnace gas with a low heat value and lowprice is used as fuel, so that the generated constant-temperature high-temperature smoke meets the requirements of lime kiln calcination and other industrial kilns; accordingly, the fuel cost is reduced and the product quality is improved; in addition, the device can achieve full combustion of air gas, and therefore the heat efficiency of a heating furnace is improved.

Description

technical field [0001] The invention relates to a heating furnace for producing lime in a lime kiln. Background technique [0002] Lime is calcium oxide (CaO), which is widely used in iron and steel industry, calcium carbide industry, alumina industry, refractory materials and other industries. It is also one of the necessary raw materials for these large-scale industrial fields. For example, in the metallurgical industry, every ton produced Steel would require about 150-170 kg of lime. The main raw material for lime production is limestone, the main component of limestone is calcium carbonate (CaCO 3 ), the basic principle of burning lime is to use high temperature to decompose calcium carbonate in limestone into calcium oxide and carbon dioxide. [0003] Lime production process is mainly divided into preheating, calcination, cooling and ash unloading. The process based on the existing lime production technology is: put limestone and solid fuel into the lime kiln, or sen...

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Problems solved by technology

[0007] In order to solve the above problems, the inventor tried to use the existing heating furnace device to provide calcining hot flue gas for the lime kiln, but the existing heating furnace technology generally uses metal burners, which have low power and low efficiency, and it is difficult to provide sufficient lime There are technical defects such as high-temperature flue gas from kiln calcination. At the same time, there is also the problem that the gas cannot be completely burned, which leads to serious waste of fuel, and it is difficult to meet environmental protection requirements for emissions.

[0008] As a relatively common form of industrial furnaces, heating furnaces are widely used in various industrial fields. In the field of metallurgical industry, heating furnaces are mainly used for coal-injection coal powder drying, steel rolling steel heating, etc., and metal burners are generally used. Due to Conventional heating furnaces mostly use metal burners, and it is not suitable to use higher preheating temperature for the input air gas. Difficult to adapt to lime kiln calcination needs

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