Novel double-hearth kiln for combustion of low-calorific-value fuel

Abstract

The invention discloses a novel double-hearth kiln for combustion of low-calorific-value fuel, which comprises a feeding device, a first kiln body and a second kiln body, wherein the feeding device isrespectively connected with the first kiln body and the second kiln body; the first kiln body comprises a first preheating device, a first calcining device, a first cooling device and a first discharging device from top to bottom; the second kiln body comprises a second preheating device, a second calcining device, a second cooling device and a second discharging device from top to bottom; the first kiln body and the second kiln body are connected through a fixed connecting device. According to the novel double-hearth kiln for combustion of low-calorific-value fuel, the combustion temperatureof the low-calorific-value fuel can be increased through the branch pipes, the main pipe, the combustion chamber and the heat storage box, and the calcination effect is optimized; meanwhile, the cooling device can realize effective conversion and recovery of material heat, so that the energy consumption is further reduced; the double-hearth kiln can achieve mutual switching between the two kiln bodies, and continuous production of materials is completed; finally, the feeding device can enable the double-hearth kiln to discharge materials conveniently, so that the labor intensity of workers isreduced.

Description

technical field [0001] The invention relates to the technical field of industrial kilns, in particular to a novel double-chamber kiln burning fuel with low calorific value. Background technique [0002] The process of calcining and decomposing limestone raw materials into lime products needs to go through the storage zone, preheating zone, calcination zone and cooling zone in the kiln. However, traditional industrial kilns are mostly single-chamber kilns, which often have the following problems during use: [0003] On the one hand, the double-chamber kilns currently on the market are all standard double-chamber kilns. This standard double-chamber kiln must use high-calorific-value fuels to meet the design specifications and produce qualified products. High-calorific-value fuels refer to fuels with a calorific value above 1600kcal. fuels, such as pulverized coal, natural gas, coke oven gas, mixed gas (>1600kcal), etc., but some companies do not have these types of fuels, ...

AI Technical Summary

Problems solved by technology

The use of low-calorific-value fuels restricts the application of double-chamber kilns

[0004] On the other hand, the existing single-chamber kiln cannot effectively convert and recover the heat in the material during the cooling process, making the energy utilization rate low and increasing the production cost; the existing single-chamber kiln often calcines The high-calorie flue gas generated in the process is directly discharged, and the single-chamber kiln cannot realize the continuous production of materials, which reduces the production efficiency; the existing single-chamber kiln or double-chamber kiln is often inconvenient in the process of calcination and blanking, resulting in The labor intensity of the staff increases, increasing their labor burden

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