Concurrent flow type double-hearth limekiln

Abstract

The invention relates to a concurrent flow type double-hearth limekiln, comprising a double-hearth limekiln body, a feeding device, a discharge device, an air supply system, a fuel feeding system and an exhaust emission system. A preheating zone, a burning zone and a cooling zone are arranged in a hearth at each side in the limekiln body, each burning zone of each hearth is provided with a burner nozzle. The fuel feeding system is provided with a steering device and a steering storage tank which is a floating roof tank, the inlet of the steering device is connected with the outlet of a Roots blower, one side of the outlet is connected with the burner nozzle through a three-way valve, and the other side of the outlet is connected with the steering storage tank. A bypass is arranged between a connecting pipeline of the steering device and the steering storage tank and the inlet of the three-way valve, and a valve is arranged on the bypass. In the concurrent flow type double-hearth limekiln, by arranging the steering storage tank and the bypass, fuel gas is discharged to the steering storage tank in the steering process, and gas discharged by the steering storage tank and the fuel gas enter the limekiln together when the fuel gas is fed, so that the fuel gas is prevented from being discharged to the atmosphere in the steering process, the fuel is saved, the production cost of lime is reduced, pollution to the atmosphere is reduced, and the environment is protected.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and chemical equipment, and relates to a lime kiln, in particular to a parallel-flow double-chamber lime kiln with a reversing storage tank. Background technique [0002] Active lime is an important flux and slagging agent in steel production. The rapid development of the iron and steel industry has drawn more and more attention to the production and equipment of active lime. The types of lime kiln mainly include beam kiln, sleeve kiln and co-current double-chamber kiln, and parallel-flow double-chamber kiln is also called Maerz kiln. The parallel-flow double-chamber kiln is equipped with two kiln bodies A and B. The two kiln bodies are respectively equipped with a preheating zone, a calcination zone and a cooling zone. The bottoms of the calcination zones of the two kiln bodies are connected to each other. The bore runs downwards respectively. When kiln A is calcined, the combustion air ...

AI Technical Summary

Problems solved by technology

Since the Roots fan is used to supply fuel gas to the kiln body, the fan cannot hold the pressure, so the gas is discharged to the outside during the reversing period

This part of the discharged fuel gas is wasted in vain, which not only wastes energy and increases the energy consumption of lime production, but also causes air pollution and endangers environmental safety due to gas emissions.

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