A kind of energy-conserving and environment-protective lime shaft kiln
Technical field
The invention belongs to energy-conserving and environment-protective lime burner furnace technical field, be specifically related to a kind of energy-conserving and environment-protective lime shaft kiln.
Background technology
The energy-conserving and environment-protective limestone kiln of prior art comprises at the bottom of kiln body, automatic charging machine, kiln top material distributing machine, the kiln automatic ash-discharging machine and ejects the desulfurizing dust-collector that smoke pipe is communicated with kiln.The lime burner furnace of this structure all adopts the coal charge multifuel combustion, and utilization rate of heat value is low, and flue gas and dust pollution are serious, and labour intensity is large, poor product quality, and mechanization degree is low, and product cost is high, can't reach the energy-saving and emission-reduction requirement of the market requirement and national industrial policies.The simultaneously reasonable use of fuel has become the main examination emphasis of production unit, and the thermo-efficiency of furnace equipment directly affects the comprehensive utilization of heat energy.
Summary of the invention
The objective of the invention is to solve that prior art exists that coal charge multifuel combustion, utilization rate of heat value are low, flue gas and dust pollution is serious, labour intensity large, poor product quality, mechanization degree is low, product cost is high technical problem, provide a kind of energy-conserving and environment-protective automatization lime shaft kiln, to remedy the deficiencies in the prior art.
For achieving the above object, energy-conserving and environment-protective automatization lime shaft kiln of the present invention comprises at the bottom of kiln body, automatic charging machine, kiln top material distributing machine, the kiln automatic ash-discharging machine and ejects the desulfurizing dust-collector that smoke pipe is communicated with kiln; Its main points are from top to bottom to be provided with successively preheating chamber, radiant, high-temperature burner hearth in the kiln body, be provided with the open-close type distributor between preheating chamber and the radiant, the outside of radiant is provided with the two ends mouth of pipe and reclaims heat pipe with the annular heavy caliber that the top of the bottom of preheating chamber and high-temperature burner hearth is communicated with respectively, the outside of radiant and high-temperature burner hearth is provided with the coal powder injection machine, the nozzle of coal powder injection machine is communicated with radiant, and the induced exhaust of coal powder injection machine is communicated with high-temperature burner hearth.
For the reasonable utilization that the even preheating of material that makes in the preheating chamber improves heat energy, the bottom of said preheating chamber is provided with the donut cross wind-distributing pipe.
Described material distributing machine, open-close type distributor, automatic ash-discharging machine adopt respectively air cylinder driven, and action fast accurately puts in place.
Described coal powder injection machine can utilize the torch firing of the mixed thing of blast furnace waste gas, Sweet natural gas, coal dust and coal gas in the kiln.
Reasonable in design of the present invention, be convenient to automated operation, changed coal charge in traditional shaft furnace multifuel combustion mode, solved that prior art exists that coal charge multifuel combustion, utilization rate of heat value are low, flue gas and dust pollution is serious, labour intensity large, poor product quality, mechanization degree is low, product cost is high technical problem.
Appended drawings is structural representation of the present invention.
Among the figure 1, automatic charging machine 2, kiln top material distributing machine 3, preheating chamber 4, donut cross wind-distributing pipe 5, open-close type distributor 6, desulfurizing dust-collector 7, annular heavy caliber reclaim automatic ash-discharging machine 11 at the bottom of heat pipe 8, radiant 9, high-temperature burner hearth 10, the kiln, coal powder injection machine
Embodiment
With reference to the accompanying drawings, the present invention includes at the bottom of kiln body, automatic charging machine 1, kiln top material distributing machine 2, the kiln automatic ash-discharging machine 10 and eject the desulfurizing dust-collector 6 that smoke pipe is communicated with kiln; From top to bottom be provided with successively preheating chamber 3, radiant 8, high-temperature burner hearth 9 in the kiln body, be provided with open-close type distributor 5 between preheating chamber 3 and the radiant 8, the outside of radiant 8 is provided with the two ends mouth of pipe and reclaims heat pipe 7 with the annular heavy caliber that the top of the bottom of preheating chamber and high-temperature burner hearth is communicated with respectively, the outside of radiant and high-temperature burner hearth is provided with coal powder injection machine 11, the suction pipe of coal powder injection machine 11 is communicated with radiant 8, and the blast pipe of coal powder injection machine 11 is communicated with high-temperature burner hearth 9; The bottom of preheating chamber 3 is provided with donut cross wind-distributing pipe 4.
Principle of work of the present invention: building stones are through automatic charging machine 1, kiln top material distributing machine 2, preheating chamber 3, open-close type distributor 5, radiant 8 enters high-temperature burner hearth 9, after high-temperature burner hearth 9 has advanced material, close open-close type distributor 5, and then carry building stones to be stored in the preheating chamber 3, after preheating chamber 3 has advanced material, close again kiln top material distributing machine 2, open the coal powder injection machine to high-temperature burner hearth 9 interior igniting coal powder injections, burned flame enters 9 pairs of building stones of high-temperature burner hearth and carries out roasting, do not have the flue gas of perfect combustion and burnt grain to enter radiant 8 and carry out again secondary combustion, make fuel fully burning in radiant.Clean-burning hot gas enters 3 pairs of building stones of preheating chamber from annular heavy caliber recovery heat pipe 7 and carries out preheating, and the smoke pipe through the kiln top enters desulfurizing dust-collector 6 again, further desulfurization and dedusting.Roasting is complete, and by radially cloth wind cooling of the gas blower at the bottom of the kiln, cooling is unloaded ash by automatic ash-discharging machine 10.Then carrying out next round operation, so circulation.
The present invention changes over the direction of motion of high-temperature furnace gas identical with the material movement direction, forms concurrent heating, makes high-temperature material be in the heated condition of continous-stable, is heated the temperature of charge longer duration, is conducive to the decomposition of Wingdale and burns till quality.Segmentation preheating, heating have improved thermal zone heating-surface area, strengthened should the zone temperature homogeneity, material that all should the zone is in the isothermal environment simultaneously heats.This kiln is provided with the high temperature furnace, when heat to the processing requirement temperature and be in thermal steady state after, be in the condition of high temperature in the furnace always, furnace body temperature around the stove passes to thermal zone material with a large amount of radiant heat, strengthened heating efficiency, adopt pulverized coal combustor, coal dust is rapidly burning in the high temperature furnace, the volatilization powder that forms and burnt grain carry out secondary combustion again, make fuel abundant in the combustion chamber internal combustion, can not form the pollutents such as tobacco (fugitive constituent) and black smoke (fixed carbon and carbon black), reach desirable national fume emission requirement.The annular heavy caliber reclaims heat pipe, impels the discharging of furnace gas unobstructed, has guaranteed simultaneously the furnace gas discharging homogeneity along the stove cross section, and the branch that has improved gas stream in the stove has reduced the resistance of gas stream in the stove, makes the exhaust-heat absorption utilization of gas.
Complete each point operation of kiln all adopts air cylinder driven, and action fast accurately puts in place.The material loading of kiln, blanking enter stove and give thermal zone feed, and bottom discharge all adopts the pneumatics operation, by time relay control, have reduced personnel's operation link, have improved production efficiency.
The furnace roof flue gas is processed through desulfurizing dust-collector through after recycling preheating again, reaches discharging standards.
The present invention names and is energy saving and environment friendly FJC shaft furnace.
Although above-mentionedly by reference to the accompanying drawings the specific embodiment of the present invention is described; but be not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.