Steel wire diffusion fluidized bed furnace

Abstract

The invention discloses a steel wire diffusion fluidized bed furnace, comprising a furnace body, a feeding gate and a discharging gate respectively arranged on the two ends of the furnace body, a heating cavity arranged in the furnace body and provided with zircon sand or aluminum sand on the bottom, a sand return device mounted in the furnace body, a fluidization mechanism and a combustion mechanism, wherein the fluidization mechanism comprises a plurality of radiation pipes which are parallelly arranged at intervals, each radiation pipe is transversely arranged in the zircon sand or aluminum sand, a plurality of fluidization holes with downward openings are uniformly distributed in the radiation pipe, and radiation pipes are communicated with a fluidization air ladle; and the combustion mechanism comprises a combustion nozzle mounted on the furnace body and higher than the height of the boiled zircon sand or aluminum sand after boiling, and the combustion nozzle is mixedly communicated with a combustion-supporting air pipeline and a fuel gas pipeline. The fluidized bed furnace is reasonable in structure, and is safe and reliable. The fluidized bed furnace can accurately control the proportion between the fuel and the combustion-supporting air, improve the combustion efficiency of the fuel, and furthermore improve the heating efficiency of the fluidized bed, not easily flame out, make the steel wire indirectly contact with the flame, has less oxidized surface and better quality of the steel wire.

Description

technical field [0001] The invention relates to a particle furnace, in particular to a steel wire diffusion boiling particle furnace. Background technique [0002] At present, the steel cord electroplated brass steel wire is produced in China by using an intermediate frequency electric heating furnace. Foreign and foreign-funded enterprises use diffusion fluidized bed (foreign name) heating to produce. The production of electroplated brass steel wire is to diffuse and conduction heat the inner copper-coated and outer galvanized steel wire in high-temperature boiling zircon sand, so that the copper-coated layer and galvanized layer are quickly melted and melted to obtain brass-coated steel wire. Since the thickness of copper plating and zinc plating is measured in 1 to 2 microns, the production process and equipment control requirements are particularly precise, in order to achieve rapid melting and melting of copper plating and zinc plating, and to accurately control the co...

AI Technical Summary

Problems solved by technology

At present, the furnace bottom of the steel wire diffusion boiling particle furnace is directly a steel plate, and there are many zircon sands stored in the furnace body. A radiant tube is installed in the furnace body. The radiant tube is provided with a gas outlet, and the radiant tube is directly inserted to connect the combustion pipeline and the fluidization tube. After the gas is fed into the combustion pipeline and mixed with the cold air from the fluidization pipeline, it enters the radiant tube, and then the mixed flue gas is blown out from the gas outlet to blow the zirconium sand into a boiling shape, and the steel wire passes through the furnace body. Zircon sand heating, but there are several disadvantages in this structure: 1. Since the bottom of the furnace body of the current steel wire diffusion fluidized fluidized furnace is a steel plate, it does not have heat storage effect, so the heat in the furnace body is easily lost; 2. Fluidization The air provided by the pipeline is cold air, which needs to absorb part of the heat, thus reducing the heating efficiency of the heating furnace; 3. Since the flue gas after combustion enters the radiant tube together with the fluidizing air, it is limited by the size of the air outlet of the radiant tube At the same time, the temperature in the particle furnace must meet the requirements, which requires precise control of the flow and pressure of the flue gas and fluidizing air, as well as the ratio between the flue gas and fluidizing air, if the flow or pressure entering the radiant tube is too high Large or too small, it is easy to cause the gas pipeline to stall, which seriously affects the normal use of the particle furnace

Although it is proposed in the public document that the fuel gas and air are respectively passed into the furnace tank for combustion, which solves the problem that the gas pipeline is likely to be flamed out, there are still the following problems in this structure: 1. Due to the fuel and air in the fuel gas chamber The air in the room enters the furnace tank through the air distribution plate, so the ratio between fuel and air is not easy to control and adjust; 2. The furnace tank and the fuel chamber are separated by the air distribution plate, and the temperature in the furnace tank is very high, so the fuel The temperature in the air chamber will also be very high (ignition point), which is very easy to cause safety accidents; 3. Zircon sand or aluminum sand is placed above the air distribution plate, and when the zircon sand or aluminum sand boils, it will also blow from the small area of ​​the air distribution plate. The hole enters the fuel air chamber, but once the machine is shut down, zircon sand or aluminum sand will fall into the fuel air chamber, affecting production; 4. The air entering the air chamber is air at normal temperature, which needs to absorb part of the heat, thereby reducing the temperature of the furnace. The heating efficiency of the tank; 5. When the fuel and air enter the furnace tank for combustion, they also fluidize the zircon sand or aluminum sand, and the combustion flame is in the sand, which affects the combustion efficiency; 6. The gas and air in the furnace The furnace burns while mixing, and the gas after mixing is insufficient and uneven; 7. The workpiece is heated by an open flame while burning while mixing in the furnace, which is easy to oxidize the workpiece; 8. It is only suitable for intermittent production, not continuous production , not suitable for steel wire tempering heating; 9. Due to burning in zircon sand or aluminum sand, it is limited by temperature, pressure, flow rate, oxides produced in the production process, and zircon sand or aluminum sand powder. Easy to turn off

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