Solid material heat-exchanging device
The utility model relates to the dolime waste-heat recovery device of metal magnesiothermy field of smelting, particularly relate to the solid material heat-exchanging device of forging back dolomite waste heat recovery, forge recycling, the energy-saving and emission-reduction of the entrained heat of back dolomite, the purpose of reduction enterprise energy consumption to reach a high temperature.
Dolomite calcination is that the metal magnesiothermy is smelted the important step in the production process, its effect is that the raw material-dolomite of method for smelting magnesium by hot is calcined under 1150～1200 ℃ high temperature, to get rid of moisture content, the magnesian chemism of increase dolomite main component in the dolomite,, it provides electrochemical conditions for entering down road reduction operation.
Dolomite calcination in the present hot method magnesium production process mainly adopts rotary kiln to finish.In the calcining production process, through broken block dolomite tcrude ore, in rotary kiln, be heated to the temperature of process stipulation through external heat source, rotate with the rotary kiln body, expel from kiln, enter ad hoc cooler along the kiln hood chute, the method that employing is kicked up-fallen is cooled to environment temperature, in this process, a large amount of waste heats that dolomite is entrained are fully by in the atmosphere around diffusing.This cooling means has the shortcoming of following several respects: 1, the forge back dolomite entrained a large amount of heat energy of temperature about 700～800 ℃ are wasted; 2, the heat that is diffused out causes the zonule ecological deterioration; 3, hot environment impels cooler to reach miscellaneous equipment corrosion and damage on every side; 4, the safety and Health that is unfavorable for operating personnel; 5, in order to keep the high-temperature calcination process, the burner that is located at rotary kiln end still will constantly provide fuel in kiln, and the thermal efficiency of rotary kiln is extremely low, runs counter to the recycling economy principle of energy-saving and emission-reduction.
The utility model content
The utility model provides a kind of solid material heat-exchanging device, purpose exactly in order to solve the problems of the technologies described above be that the high temperature that solves in the dolomite calcination process is forged problems such as waste heat recovery, severe operational environment are expected in the back, equipment corrosion is serious, the rotary kiln thermal efficiency is low.
In order to solve the problems of the technologies described above, the utility model is achieved in that solid material heat-exchanging device, wherein the middle part of body is a cavity, be provided with feeding mouth in upper part of body, feeding mouth communicates with cavity, and the bottom of body is communicated with the discharge chute, is provided with air supplying chamber in the bottom of body, be provided with air grid between the cavity of air supplying chamber and body, the cavity Heat Room at the body middle part is communicated with hot-blast outlet.
Described feeding mouth is provided with the dust seal cover.
Described feeding mouth cross sectional shape is circle or rectangle.
Described feeding mouth place is provided with the umbrella shape seal, and the umbrella shape seal is connected with elevating mechanism.
The umbrella top angular range of described umbrella shape seal is 20 °～150 °.
Described umbrella shape seal and elevating mechanism adopt the pulsed lifting action, and its pulse interval scope is 3～240 seconds.
The lifting travel scope of described umbrella shape seal is 5～300mm.
The below of described air supplying chamber is provided with the air feed machine.
Described air supplying chamber is shaped as triangle.
Described air feed machine extend in the air supplying chamber.
Described air supplying chamber is provided with clean-out door.
Described clean-out door is 1～8.
Described air grid is two, and the scope of the angle of two air grids is 30 °-180 °.
Described air grid is provided with wind-tunnel, wind-tunnel be shaped as circle, rectangle or prismatic; The diameter of wind-tunnel is 1～150mm, and quantitative range is 10～1000.
The thickness range of described air grid is 2～200mm.
Described discharge chute is 1～20.
Described hot-blast outlet is 1～10.
Described body is a refractory thermal insulating material.
The thickness of described body is 50～500mm.
The utlity model has following advantage:
1, owing to air in Heat Room be and the direct heat convection of high-temperature material, thus the heat exchange efficiency height, the hot air temperature height of output.
2, owing to taked the sealing and dustproof measure, in Heat Room, taked high temperature resistant and adiabatic measure in the solid material heat-exchanging device porch, so the dolomite thermal loss was little after high temperature was forged, waste heat recovery rate height.
3, the high-temperature hot-air of output is directly used in the rotary kiln combustion system after heat exchange, with effectively reducing the quantity delivered of fuel, has remarkable energy saving effect.
4, the solid material heat-exchanging device volume is less, installs with rotary kiln to be connected compact, can saving equipment be installed by floor space.
5, the well insulated measure of solid material heat-exchanging device employing has reduced high-temperature material environment dissipated heat towards periphery, has effectively improved operating environment and equipment working environment.
6, economical and practical, simple and easy to do, meet the recycling economy principle of energy-saving and emission-reduction.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the utility model monomer floor map.
Among the figure, 1, the rotary kiln body; 2, rotary kiln end; 3, chute; 4, high-temperature material; 5, dust seal cover; 6, feeding mouth; 7, umbrella shape seal; 8, elevating mechanism; 9, Heat Room; 10, air feed machine; 11, air supplying chamber; 12, air grid; 13, cooling material; 14, discharge chute; 15, conveying equipment; 16, hot-blast outlet; 17, body.
The specific embodiment
Below embodiment of the present utility model is described in detail in conjunction with the accompanying drawings, but protection domain of the present utility model is not limit by embodiment.
As shown in the figure, the structure of the utility model solid material heat-exchanging device is as follows: the rotary kiln end 2 on the rotary kiln body 1 is connected with chute 3, chute 3 is provided with feeding mouth 6 with the top of body 17 and is communicated with, feeding mouth 6 is provided with dust seal cover 5, feeding mouth 6 cross sectional shapes are circle or rectangle, body 17 is for there being the body of cavity, feeding mouth 6 communicates with cavity, feeding mouth 6 places are provided with umbrella shape seal 7, umbrella shape seal 7 is connected with elevating mechanism 8, the umbrella top angular range of umbrella shape seal 7 is 20 °～150 °, umbrella shape seal 7 adopts the pulsed lifting action with elevating mechanism 8, its pulse interval scope is 3～240 seconds, and the lifting travel scope of umbrella shape seal 7 is 5～300mm; The bottom of body 17 is communicated with discharge chute 14, and discharge chute 14 is 1～20; Be provided with air supplying chamber 11 in the bottom of body 17, be provided with air grid 12 between the cavity of air supplying chamber 11 and body 17, air grid 12 is two, the scope of the angle of two air grids is 30 °-180 °, air grid 12 is provided with wind-tunnel, wind-tunnel be shaped as circle, rectangle or prismatic, the diameter of wind-tunnel is 1～150mm, quantitative range is 10～1000, and the thickness range of air grid 12 is 2～200mm; The below of air supplying chamber 11 is provided with air feed machine 10, and air supplying chamber 11 is shaped as triangle, and air feed machine 10 extend in the air supplying chamber 11, and air supplying chamber 11 is provided with clean-out door 18, and clean-out door is 1～8; Cavity Heat Room 9 at body 17 middle parts is communicated with hot-blast outlet 16, and hot-blast outlet 16 is 1～10.
Described body is a refractory thermal insulating material, and the thickness of body is 50～500mm.
Described umbrella shape seal should have the anti-performance of high temperature more than 800 ℃.
Described dust seal cover should firmly be connected densely with feeding mouth, and has the anti-performance of high temperature more than 800 ℃.
Operation principle of the present utility model: high-temperature material is in chute 3 enters into feeding mouth 6 under the dust seal cover 5; Umbrella shape seal 7 moves up and down with pulse mode under the drive of its elevating mechanism 8, and high-temperature material 4 drops in the Heat Room 9 continuously; Air feed machine 10 blasts air supplying chamber 11 with cold air, and cold wind by air grid 12, passes through in the lump material gap more equably, finishes its heat exchange in the mode of convection heat transfer' heat-transfer by convection.Cooling material 13 through heat exchange is discharged along the discharge chute 14 that is located at both sides, body 17 bottom, transports subsequent processing to by conveying equipment 15.Finish the hot-air of heat exchange,, after delivering to cleaner and handling, adopt utilidor to be transported to the combustion system of rotary kiln via the hot-blast outlet 16 on Heat Room 9 tops.