Gas guide system for gas-burning double-hearth lime kiln

Abstract

The invention discloses a gas guide system for a gas-burning double-hearth lime kiln. The gas guide system comprises a first kiln hearth and a second kiln hearth, wherein first ring pipes are respectively arranged on the outer walls of the hearth bodies of the first kiln hearth and the second kiln hearth; a gas pipeline, a cooling air duct and a nitrogen pipeline are connected to the first ring pipes; a plurality of spray gun hoses are connected onto the first ring pipes; a plurality of spay guns corresponding to the spray gun hoses are connected onto inner walls of the heart bodies of the first kiln hearth and the second kiln hearth; the spray guns are communicated with the spray gun hoses; a gas pressuring machine is connected onto the gas pipeline; check valves are connected onto the gas pipeline and the cooling air duct; a protective cover is connected onto the spray guns; and the spray guns are positioned inside the protective cover. The gas guide system disclosed by the invention is simple in structure, and the using cost and maintenance cost of the hearths are saved. Meanwhile, the usage amount of purge gas is saved, the purging effect is excellent, process concatenation is simple, the concatenation points of the process are greatly reduced, the process is conveniently controlled, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of calcination equipment, in particular to a gas guiding system of a gas-fired double-chamber lime kiln. Background technique [0002] Gas-fired double-chamber lime kiln is a lime kiln that uses natural gas, blast furnace gas, liquefied petroleum gas and other gases with a certain calorific value to calcine lime. After ventilation, preheating, calcination and cooling, the lime is evenly discharged out of the kiln through the ash unloading device under the kiln. [0003] Each kiln body of the existing gas-fired double-chamber lime kiln is designed with two ring pipes, which are the spray gun cooling air ring pipe and the gas ring pipe. If the two kiln chambers of the double-chamber lime kiln are respectively A and kiln chamber B, when there is gas burning in kiln chamber A, there is coal gas in the gas ring pipe of kiln chamber A, and there is no cooling air in the spray gun cooling air ring pipe of kiln cha...

AI Technical Summary

Problems solved by technology

[0003] Each kiln body of the existing gas-fired double-chamber lime kiln is designed with two ring pipes, which are the spray gun cooling air ring pipe and the gas ring pipe. If the two kiln chambers of the double-chamber lime kiln are respectively A and kiln chamber B, when there is gas burning in kiln chamber A, there is coal gas in the gas ring pipe of kiln chamber A, and there is no cooling air in the spray gun cooling air ring pipe of kiln chamber A, at this time the other kiln chamber B The cooling air ring pipe of the spray gun has cold air to cool the spray gun pipe of kiln B. At this time, the gas ring pipe of kiln B has no gas flow; when the cycle is reversed, the gas ring pipe of kiln B starts to have gas flow. There is no cooling air in the cooling air ring pipe of the spray gun in the kiln chamber B; the chamber A is just opposite to the chamber B; that is to say, the gas ring pipe of the existing gas-fired double-chamber lime kiln and the cooling air pipe of the spray gun are in the same kiln chamber It cannot be used at the same time. In addition, the two-way ring pipe must be purged every time the cycle is reversed to prevent the gas from infiltrating into the ring pipe and causing backfire and explosion. The existing gas-fired double-chamber lime kiln gas guide system The design not only increases the cost of purge gas, but also increases the interlocking conditions of the process, and the number of ring pipes and spray gun pipes is large, the layout is complicated, it is not convenient for process control, the production efficiency is low, and the cost of use and daily maintenance is high.

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