CN209876947U - Combined smelting furnace for treating arsenic alkali slag and low-melting-point heavy metal waste slag - Google Patents
Combined smelting furnace for treating arsenic alkali slag and low-melting-point heavy metal waste slag Download PDFInfo
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- CN209876947U CN209876947U CN201920195762.XU CN201920195762U CN209876947U CN 209876947 U CN209876947 U CN 209876947U CN 201920195762 U CN201920195762 U CN 201920195762U CN 209876947 U CN209876947 U CN 209876947U
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Abstract
The utility model discloses a handle arsenic alkali waste and low melting point heavy metal waste residue combination formula smelting furnace, including lock wind feeding machine, rotary kiln, vertical burning furnace, high temperature flue gas chamber and broken discharge mechanism that burns, lock wind feeding machine links to each other with the rotary kiln, the rotary kiln links to each other with vertical burning furnace, vertical burning furnace that burns links to each other with broken discharge mechanism, high temperature flue gas chamber parcel is in the rotary kiln is outside, the rotary kiln barrel passes through the sealing washer with high temperature flue gas chamber both ends and vertical burning furnace casing and links to each other. After the materials pass through the two-stage combustion process of the rotary kiln and the vertical incinerator, high-temperature flue gas is discharged through the rotary kiln and a flue gas outlet of a high-temperature flue gas chamber, and after the residues after combustion are acted by a crushing and discharging mechanism, complete combustion is thoroughly realized. The utility model discloses the combined incinerator who sets up is as calcining equipment, and equipment structure is simple unique, and convenient operation, cost are low, and unique technology through two sections combination formula calcines is all suitable for arsenic alkali residue, arsenic a flat stone with ropes attached at the sides sediment, arsenic-containing mud etc. strong adaptability.
Description
Technical Field
The utility model belongs to the technical field of burn burning furnace and relevant, concretely relates to handle arsenic alkali sediment and low melting point heavy metal waste residue combination formula smelting furnace.
Background
With the development of economy, industrial waste residues and industrial garbage are more and more, and the direct stacking or deep burying treatment of the industrial waste residues containing low-melting-point heavy metals, such as arsenic alkali residues, smelting waste residues containing arsenic, mercury, lead, zinc, cadmium sludge and the like, can cause toxic substances contained in the waste residues to be dissolved out to pollute the environment, so that special storage is needed, even if the toxic substances are stored, leakage events frequently occur, and the pollution problem of the industrial waste residues becomes a bottleneck factor restricting the development of the industry.
The existing incineration method generally adopts an incinerator such as a grate furnace, a fluidized bed furnace, a rotary kiln, a vertical direct-fired furnace, a vertical pyrolysis furnace and the like for incineration, the incineration devices mainly treat industrial garbage, most of the incineration devices are of a single combustion chamber structure, and basically, a multi-form incineration smelting or system combining oxygen-free (or oxygen-poor) pyrolysis gasification and high-temperature calcination is not arranged, so that the purpose of insufficient combustion of industrial garbage with complex components is achieved, the treated substances can not be melted and sublimated at different temperatures to obtain different volatile substances, and the treatment of waste gas and waste residues can not really realize harmless and resource treatment.
In order to reduce the harm of harmful solid wastes to the environment, an incineration device which can realize gasification, sublimation and collection of substances with different melting points at different temperatures in a kiln, thoroughly desorb toxic and harmful substances in waste residues, eliminate the harm, collect useful components and realize no environmental pollution of sintered products is urgently needed.
The invention patent CN 106468436A discloses a novel combined smelting furnace for treating arsenic alkali slag and low-melting-point heavy metal waste slag, which comprises a rotary kiln and a main furnace, wherein the rotary kiln comprises a furnace body, a feeding hole and a furnace tail. The inclination angle of the rotary kiln and the ground is 15 degrees, the feed inlet is higher than the furnace tail, the furnace tail of the rotary kiln is even communicated with the main furnace in the furnace chamber of the main furnace, two surfaces of the furnace body are provided with heat-supporting walking rings, the middle part of the furnace body is provided with a transmission gear ring, the transmission gear ring is matched and connected with a driving structure, the furnace tail of the rotary kiln is provided with a cooling air ring group, the cooling air ring group comprises an air inlet pipe, a plurality of air inlet nozzles and a peripheral cooling air ring, the air inlet nozzles are tangentially communicated with the peripheral cooling air ring in the circumferential direction, the axial tangential angle of the peripheral cooling air ring is 30-40 degrees, and the tail part of the peripheral cooling air ring is provided with a.
The invention patent CN 107178786A provides a combined burning device, which combines a rotary kiln burning furnace and a fluidized bed burning furnace for use, and comprises that one side of the fluidized bed burning furnace is communicated with the rotary kiln burning furnace, the unburnt waste of a legal person falls from the top to the bottom of the kiln receiving the rotary kiln burning furnace, the other side of the fluidized bed burning furnace is communicated with a horizontal settling secondary combustion furnace, and the flue gas is conveyed to the horizontal settling secondary combustion furnace, and the horizontal settling secondary combustion furnace is provided with an ammonia water atomizing nozzle and a dust settling and catching device.
Disclosure of Invention
In order to overcome the problem among the prior art, the utility model provides a handle arsenic alkali sediment and low melting point heavy metal waste residue combination formula smelting furnace through the improvement to rotary kiln and vertical burning furnace, has realized organic matter pyrolysis desorption, and the low melting point heavy metal sublimation process of smelting, its suitability is strong, and is all suitable for containing low melting point heavy metal industrial waste residue for example arsenic alkali sediment, contain arsenic, mercury, lead, waste slag such as zinc mud are smelted, also is applicable to and contains organic thing discarded object pyrolysis and burns.
In order to achieve the above object, the utility model discloses a following technical scheme realizes:
a combined smelting furnace for treating arsenic alkali slag and low-melting-point heavy metal waste slag is characterized by comprising an air locking feeder, a rotary kiln, a vertical incinerator, a high-temperature flue gas chamber and a crushing and discharging mechanism, wherein the air locking feeder is connected with the rotary kiln, the rotary kiln is connected with the vertical incinerator, the vertical incinerator is connected with the crushing and discharging mechanism, and the high-temperature flue gas chamber is wrapped outside the rotary kiln;
the rotary kiln comprises a feeding end, a barrel, a supporting mechanism, a transmission mechanism, a kiln tail flue gas chamber, a flue gas outlet, an L-shaped lifting blade and a discharging end; the supporting mechanisms are positioned at two ends of the barrel, the transmission mechanism and the kiln tail flue gas chamber are positioned at the feed end of the rotary kiln, and the L-shaped lifting blade is positioned on the barrel;
the vertical incinerator comprises a vertical incinerator shell, an incineration hearth, a fuel inlet, a smoke outlet and an observation window, wherein the fuel inlet is positioned on the side wall of the vertical incinerator, and the smoke outlet of the vertical incinerator is positioned at the top of the vertical incinerator;
the rotary kiln cylinder is connected with two ends of the high-temperature flue gas chamber, the vertical incinerator shell and the kiln tail flue gas chamber through sealing rings.
Further, the length-diameter ratio of the rotary kiln is 5-8, the height-diameter ratio of the vertical incinerator is 3-5, the rotary kiln is arranged in an inclined descending manner from the feeding end to the discharging end, and the slope is 1-4%.
Furthermore, the joint of the vertical incinerator and the discharge end of the rotary kiln is provided with an inclined plane necking, the lower part incinerator hearth is inclined inwards, and the inclination angle is more than or equal to 45 degrees.
Furthermore, the high-temperature flue gas chamber comprises a high-temperature flue gas chamber shell, a flue gas chamber partition wall, an ash collecting hopper, an ash outlet, a flue gas communicating pipe, a circulating air inlet and a flue gas outlet, wherein the ash collecting hopper is positioned at the lower part of the high-temperature flue gas chamber, the flue gas outlet is positioned at the upper part of the high-temperature flue gas chamber, the circulating air inlet is positioned on the flue gas communicating pipe, and the flue gas communicating pipe is connected with the vertical incinerator.
Furthermore, the flue gas communicating pipe is connected with the vertical incinerator, the bottom of the flue gas communicating pipe is designed to be an inclined plane, the inclination angle is larger than or equal to 45 degrees, and a high-temperature expansion joint is arranged at the joint.
Furthermore, the length of the high-temperature flue gas chamber is 80-90% of the distance between the two support mechanisms of the rotary kiln, the width-to-height ratio of the section is 0.5-2, 1-3 channels are arranged on the indoor partition wall according to the length of the high-temperature flue gas chamber, ventilation positions are alternately arranged on the partition wall from top to bottom, and a through hole through which a rotary kiln cylinder can pass and can rotate is formed in the middle of the partition wall.
Furthermore, the crushing and discharging mechanism comprises a tower-type furnace grate, iron bricks, a transmission vertical shaft, a collecting hopper, a discharging pipe, a driving mechanism and a natural wind inlet, wherein the tower-type furnace grate can rotate and is connected with the driving mechanism through the transmission vertical shaft, the iron bricks are fixed on a shell of the vertical furnace, the collecting hopper is positioned at the lower part of the crushing and discharging mechanism, the discharging pipe is positioned at the lower part of the collecting hopper, and the natural wind inlet is positioned on the side wall of the collecting hopper.
Furthermore, the transmission mechanism comprises a transmission gear wheel, a bearing connecting shaft, a speed reducer and a motor.
Furthermore, the vertical incinerator casing and the high temperature flue gas chamber casing are externally of steel structures, heat insulation materials and refractory materials are lined in sequence, the refractory materials in the vertical incinerator incineration hearth are high temperature alkali-resistant materials, and clay refractory materials are adopted at other positions.
Further, it all is equipped with pressure monitor, temperature monitor, flow monitor in import and export, high temperature flue gas room, kiln tail flue gas room, the incineration furnace chamber to handle each flue gas of arsenic alkali sediment and low melting point heavy metal waste residue combination formula smelting furnace, set up the lime-ash temperature monitor in the unloading pipe, pressure monitor, temperature monitor, flow monitor and lime-ash temperature monitor link to each other with the computer control system of peripheral hardware respectively.
The utility model has the advantages as follows:
(1) the utility model provides a handle arsenic alkali sediment and low melting point heavy metal waste residue combination formula smelting furnace is through jointly using rotary kiln and vertical incinerator for entire system's adaptability reinforcing can realize anaerobic (or oxygen deficiency) pyrolysis gasification and the multiform that high temperature calcination combined together and burn or smelt, be suitable for to containing low melting point heavy metal industrial waste residue for example arsenic alkali sediment, contain arsenic, mercury, lead, zinc, waste residues such as cadmium sludge smelt the process of sublimation smelting, also be applicable to and contain organic matter discarded object pyrolysis and burn, can realize organic matter pyrolysis desorption method. The treated waste residue is thermally precipitated and sublimated in a rotary kiln, and the residual residue is completely combusted in a vertical incinerator.
(2) The utility model discloses a set up exhanst gas outlet at rotary kiln and high temperature flue gas plenum, the high temperature flue gas that will handle waste residue burning back production is used for the indirect heating heat source of rotary kiln, has reduced external emission, has prevented wasting of resources and environmental pollution, through setting up the cold wind import in communication pipeline department, can adjust the temperature in high temperature flue gas plenum and the rotary kiln, ensures that the waste residue deals with required suitable temperature.
(3) The utility model discloses the processing arsenic alkali sediment and low melting point heavy metal waste residue combination formula smelting furnace that set up is as calcining equipment, and not only equipment structure is simple unique, and convenient operation, cost are low, and through the unique technology that two sections combinations formula were calcined, can ensure arsenic alkali sediment, contain arsenic, mercury, lead, zinc, cadmium sludge etc. and smelt waste residue high temperature detoxification moreover.
(4) The utility model provides a handle arsenic alkali sediment and low melting point heavy metal waste residue combination formula smelting furnace can eliminate its toxicity harm through carrying out high temperature incineration treatment with abandonment slag charge. The invention has the advantages of short treatment process, resource saving, energy consumption reduction and production cost saving, meets the requirements of development of circular economy and sustainable development, and can completely organize large-scale industrial production.
Drawings
FIG. 1 is a schematic view of a combined type smelting furnace for treating arsenic-alkali slag and low-melting-point heavy metal waste slag;
FIG. 2 is a schematic view of the structure of the transmission mechanism of the rotary kiln;
1. locking the air feeder; 11. a feed inlet; 12. a discharge port;
2. a rotary kiln; 21. a feeding end; 22. a barrel; 23. a support mechanism; 24. a transmission mechanism; 25. a kiln tail gas chamber; 26. a flue gas outlet; 27. a discharge end; 28. a seal ring; 241. a driving gearwheel; 242. a bearing connecting shaft; 243. a speed reducer; 244. an electric motor;
3. a vertical incinerator; 31. a vertical furnace shell; 32. incinerating the hearth; 33. a fuel inlet; 34. a flue gas outlet of the vertical furnace; 35. an observation window;
4. a high temperature flue gas chamber; 41. a high temperature flue gas chamber housing; 42. a smoke chamber partition wall; 43. a dust collecting hopper; 44. an ash outlet; 45. a flue gas communicating pipe; 46. a circulating air inlet; 47. a flue gas outlet;
5. a crushing and discharging mechanism; 51. a tower type furnace grate; 52. iron bricks; 53. a transmission vertical shaft; 54. a collection hopper; 55. a discharge pipe; 56. a drive mechanism; 57. a natural wind inlet;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-2, the utility model provides a handle arsenic alkali waste and low melting point heavy metal waste residue combination formula smelting furnace, including lock wind feeder 1, rotary kiln 2, vertical burning furnace 3, high temperature flue gas chamber 4 and broken discharge mechanism 5, lock wind feeder 1 links to each other with rotary kiln 2, rotary kiln 2 links to each other with vertical burning furnace 3, vertical burning furnace 3 links to each other with broken discharge mechanism 5, high temperature flue gas chamber 4 parcel is in rotary kiln 2 is outside, rotary kiln barrel 22 links to each other through sealing washer 28 with high temperature flue gas chamber 4 both ends and vertical burning furnace casing 31.
The air locking feeder 1 is a spiral air locking feeder and comprises a material feeding port 11, a spiral, a transmission mechanism and a material discharging port 12, wherein the material discharging port 12 is directly connected with a kiln tail smoke gas chamber 25 and used for feeding materials into the rotary kiln 2.
The rotary kiln comprises a feeding end 21, a barrel 22, a supporting mechanism 23, a transmission mechanism 24, a kiln tail flue gas chamber 25, a flue gas outlet 26, an L-shaped lifting blade and a discharging end 27, wherein the supporting mechanism 23 is positioned at two ends of the barrel 22, the transmission mechanism 24 and the kiln tail flue gas chamber 25 are positioned at the feeding end 21 of the rotary kiln 2, the L-shaped lifting blade is positioned on the barrel 22, the transmission mechanism 24 comprises a transmission big gear 241, a bearing connecting shaft 242, a reducer 243 and a motor 244, forward transmission of materials is realized through the matching of the transmission big gear 241 and the bearing connecting shaft 242 under the action of the motor 244, the length-diameter ratio of the rotary kiln 2 is 5-8, the diameter of the rotary kiln 2 is calculated and determined according to the requirement of material processing, the rotary kiln 2 is obliquely arranged from the feeding end 21 to the discharging end 27, the slope is 1-4%, and the rotary kiln barrel 22 is designed to be, the rotary kiln cylinder 22 passes through the left and right shells 41 of the high-temperature flue gas chamber and the partition wall 42 of the flue gas chamber and passes through the shell 31 of the vertical furnace to enter the vertical furnace.
The vertical incinerator 3 comprises a vertical incinerator shell 31, an incineration hearth 32, a fuel inlet 33, a vertical incinerator smoke outlet 34 and an observation window 35, wherein the fuel inlet 33 is located on the side wall of the vertical incinerator, the vertical incinerator smoke outlet 34 is located at the top of the vertical incinerator, the height-diameter ratio of the vertical incinerator 3 is 3-5, the incineration area is calculated and determined according to the requirement of material treatment, an inclined plane necking is arranged at the joint of the vertical incinerator 3 and the rotary kiln discharge end 27, the lower incineration hearth is inclined inwards, the inclination angle is larger than or equal to 45 degrees so as to ensure that the upper hearth is large and the lower hearth is small, the material can be thrown to the center of the lower hearth, the outer portion of the vertical incinerator shell 31 is of a steel structure, the refractory material in the hearth is a high-temperature alkali-resistant material, and.
The high-temperature flue gas 4 is a rectangular shell wrapped outside the rotary kiln 2 and comprises a high-temperature flue gas chamber shell 41, a flue gas chamber partition wall 42, an ash collecting hopper 43, an ash outlet 44, a flue gas communicating pipe 45, a circulating air inlet 46 and a flue gas outlet 47, wherein the ash collecting hopper 43 is positioned at the lower part of the high-temperature flue gas chamber 4, the flue gas outlet 47 is positioned at the upper part of the high-temperature flue gas chamber 24, the circulating air inlet 246 is positioned on the flue gas communicating pipe 245, the flue gas communicating pipe 45 is connected with the vertical incinerator 3, the bottom of the flue gas communicating pipe is designed to be an inclined plane to prevent ash accumulation, the inclination angle is not less than 45 degrees, a high-temperature expansion joint is further arranged at the joint to keep enough high-temperature expansion amount necessary to ensure the safety of equipment, and the exterior.
The length of the high-temperature flue gas chamber 4 is 80-90% of the distance between two supporting structures of the rotary kiln, the width-height ratio of the section is 0.5-2, the section area of the flue gas chamber is designed according to the flue gas volume and the passing speed, the passing wind speed of the general flue gas in the flue gas chamber is designed according to the speed not higher than 0.5m/s, the partition walls 42 of the high-temperature flue gas chamber and the flue gas chamber are arranged in the range of 1-3 according to the length of the flue gas chamber, and the ventilation positions are alternately arranged on the partition walls 42 of the flue gas chamber up and.
The crushing and discharging mechanism 5 comprises a tower type furnace grate 51, iron bricks 52, a transmission vertical shaft 53, a material collecting hopper 54, a material discharging pipe 55, a driving mechanism 56 and a natural wind inlet 57, wherein the tower type furnace grate 51 and the driving mechanism 56 are connected through the transmission vertical shaft 53, the material collecting hopper 54 is positioned at the lower part of the crushing and discharging mechanism 5, the material discharging pipe 55 is positioned at the lower part of the material collecting hopper 54, the natural wind inlet 57 is positioned on the side wall of the material collecting hopper 54, the iron bricks 52 are fixed on the vertical type incinerator shell 31 and form an extrusion crushing cavity with the tower type furnace grate 51, and materials are crushed through shearing and extrusion.
All be equipped with pressure monitor, temperature monitor, flow monitor in flue gas import and export, high temperature flue gas chamber, kiln tail flue gas chamber in each system, the burning furnace, provide the timely on-line monitoring data in service, carry each data transfer to computer control system through the changer and implement analog control, automatic allotment amount of wind, feeding volume and speed of unloading realize automated operation. The discharging pipe is internally provided with an ash temperature monitor, and the pressure monitor, the temperature monitor, the flow monitor and the ash temperature monitor are respectively connected with a peripheral computer control system.
The use process of the utility model specifically introduces the incineration of the arsenic alkali residue as an example, and comprises the following steps:
firstly, adding a siliceous raw material of coal into arsenic alkali slag, then crushing, directly feeding the prepared powder into a rotary kiln through an air locking feeding machine, continuously rolling the powder under the rotation of a rotary kiln cylinder and the driving of a material raising plate, contacting the powder with high-temperature gas to obtain heat, improving the temperature of the material, decomposing arsenate when the temperature of the rotary kiln reaches about 600 ℃, sublimating and separating oxides of arsenic to enter a gas phase, and then discharging the gas from a smoke outlet of the rotary kiln. Meanwhile, alkali in the materials is heated and melted and then is wrapped by a large amount of insoluble substances and becomes particles under the action of the rotary kiln, so that the phenomenon that the operation is influenced by the ring formation caused by a large amount of liquid phase is prevented, meanwhile, the particle materials enter the vertical incinerator and are favorable for ventilation in the incinerator, the materials slowly flow into the vertical incinerator along with the inclined direction of the kiln body in the kiln, pulverized coal is added into the vertical incinerator through a fuel inlet, the temperature in a hearth of the vertical incinerator can reach over 900 ℃ due to the fact that the pulverized coal burns to generate a large amount of heat, the temperature of the materials continues to rise, components which can be gasified and sublimated at high temperature in the materials are thoroughly separated, the materials enter a high-temperature smoke chamber through a communicating pipeline and then are discharged from. Meanwhile, the alkali in the arsenic alkali slag is combined with the silicon in the siliceous raw material to form the sodium silicate glass body, which is not only beneficial to the separation of arsenic and antimony in sodium arsenate and sodium antimonate, but also beneficial to the formation of other minerals such as silicate and aluminate, and leads the reduction reaction to occur in the furnace under the condition that the oxygen content is less increased by the coal quantity.
The lump materials sintered at high temperature in the vertical incinerator move to the lower part of the incinerator body under the action of gravity, and are rapidly cooled by cold air blown into the lower part of the incinerator body to cause the large materials to shrink and crack, and then enter a crushing cavity formed by a tower type grate and iron bricks, and the crushing forces of extrusion, shearing and the like are generated by the rotation of the grate, so that the lump materials are crushed, fall to a bottom collecting hopper and slide out from a discharging pipe to be used as clinker for later use.
Cold air enters the furnace from the bottom of the furnace body through the gap of the tower-type furnace grate and exchanges heat with high-temperature materials, so that the materials can be cooled, the gas temperature can be increased, and when the cold air reaches a high-temperature section, the mixed combustion with pulverized coal is effectively realized. The high-temperature flue gas generated by the vertical incinerator during calcination is divided into two parts, wherein one part of the high-temperature flue gas enters the rotary kiln, and the other part of the high-temperature flue gas enters the high-temperature flue gas chamber, so that the rotary kiln can realize internal and external heating, the working efficiency of the rotary kiln is increased, when the temperature of the rotary kiln is too high, cold air can be introduced from a cold air inlet at the joint of the high-temperature flue gas chamber and the vertical incinerator, the temperature of the rotary kiln is reduced to reach the temperature suitable for materials, meanwhile, one part of the high-temperature flue gas does not enter the rotary kiln, the high-temperature desorption of the.
Flue gas from a flue gas outlet of the rotary kiln and a flue gas outlet of the high-temperature flue gas chamber is recycled and used as an indirect heating heat source of the rotary kiln, and can also be used for other purposes; the crushed material from the crushing mechanism is treated for other purposes.
The utility model provides a handle arsenic alkali sediment and low melting point heavy metal waste residue combination formula smelting furnace, as calcining equipment, not only equipment structure is simple unique, and convenient operation, cost are low, and through the unique technology that two sections combinations formula were calcined, can ensure the thorough processing of arsenic alkali sediment, arsenic a flat stone with ropes attached at the sides sediment etc. moreover, realize high temperature detoxification.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and is not intended to limit the practice of the invention to these embodiments. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A combined smelting furnace for treating arsenic alkali slag and low-melting-point heavy metal waste slag is characterized by comprising an air locking feeder, a rotary kiln, a vertical incinerator, a high-temperature flue gas chamber and a crushing and discharging mechanism, wherein the air locking feeder is connected with the rotary kiln, the rotary kiln is connected with the vertical incinerator, the vertical incinerator is connected with the crushing and discharging mechanism, and the high-temperature flue gas chamber is wrapped outside the rotary kiln;
the rotary kiln comprises a feeding end, a barrel, a supporting mechanism, a transmission mechanism, a kiln tail flue gas chamber, a flue gas outlet, an L-shaped lifting blade and a discharging end; the supporting mechanisms are positioned at two ends of the barrel, the transmission mechanism and the kiln tail flue gas chamber are positioned at the feed end of the rotary kiln, and the L-shaped lifting blade is positioned on the barrel;
the vertical incinerator comprises a vertical incinerator shell, an incineration hearth, a fuel inlet, a smoke outlet and an observation window, wherein the fuel inlet is positioned on the side wall of the vertical incinerator, and the smoke outlet is positioned at the top of the vertical incinerator;
the rotary kiln cylinder is connected with two ends of the high-temperature flue gas chamber, the vertical incinerator shell and the kiln tail flue gas chamber through sealing rings.
2. The combined smelting furnace for treating arsenic-alkali residue and low-melting-point heavy metal residue according to claim 1, wherein the length-diameter ratio of the rotary kiln is 5-8, the length-diameter ratio of the vertical incinerator is 3-5, the rotary kiln is arranged in an inclined descending manner from a feeding end to a discharging end, and the slope is 1-4%.
3. The combined smelting furnace for treating arsenic alkali slag and low melting point heavy metal waste slag according to claim 1, wherein the joint of the vertical incinerator and the rotary kiln discharge end is provided with an inclined plane necking, and the lower incinerator hearth is inclined inwards with an inclination angle not less than 45 °.
4. The combined smelting furnace according to claim 1, wherein the high temperature flue gas chamber comprises a high temperature flue gas chamber casing, a flue gas chamber partition wall, an ash collecting hopper, an ash outlet, a flue gas communicating pipe, a circulating air inlet and a flue gas outlet, the ash collecting hopper is located at the lower part of the high temperature flue gas chamber, the flue gas outlet is located at the upper part of the high temperature flue gas chamber, the circulating air inlet is located on the flue gas communicating pipe, and the flue gas communicating pipe is connected with a vertical incinerator.
5. The combined smelting furnace for treating arsenic-alkali slag and low-melting-point heavy metal waste slag according to claim 4, wherein the flue gas communicating pipe is connected with the vertical incinerator, the bottom of the flue gas communicating pipe is designed to be an inclined plane, the inclination angle is not less than 45 degrees, and a high-temperature expansion joint is further arranged at the joint.
6. The combined smelting furnace for treating arsenic-alkali residue and low-melting-point heavy metal residue according to claim 4, wherein the length of the high-temperature flue gas chamber is 80-90% of the distance between two supporting mechanisms of the rotary kiln, the width-to-height ratio of the section is 0.5-2, 1-3 flue gas chambers are arranged on partition walls of the flue gas chamber according to the length of the high-temperature flue gas chamber, and ventilation positions and through holes through which the rotary kiln can pass are alternately arranged on the partition walls of the flue gas chamber.
7. The combined smelting furnace according to claim 1, wherein the crushing and discharging mechanism comprises a tower-type furnace grate, iron bricks, a transmission vertical shaft, a collecting hopper, a discharging pipe, a driving mechanism and a natural wind inlet, the tower-type furnace grate can rotate and is connected with the driving mechanism through the transmission vertical shaft, the iron bricks are fixed on a vertical furnace shell, the collecting hopper is positioned at the lower part of the crushing and discharging mechanism, the discharging pipe is positioned at the lower part of the collecting hopper, and the natural wind inlet is positioned on the side wall of the collecting hopper.
8. The combined smelting furnace according to claim 1, wherein the transmission mechanism comprises a large transmission gear, a bearing connecting shaft, a reducer and a motor.
9. The combined smelting furnace according to claim 1, wherein the vertical incinerator body and the high temperature flue gas chamber are made of steel, and lined with heat insulating material and refractory material, the vertical incinerator body is made of refractory material with high temperature and alkali resistance, and the refractory material in the lining and the part except the position in the incinerator chamber are made of clay refractory material.
10. The combined smelting furnace for treating arsenic alkali slag and low-melting-point heavy metal waste slag according to any one of claims 1 to 9, wherein pressure monitors, temperature monitors and flow monitors are arranged in each flue gas inlet and outlet, high-temperature flue gas chambers, kiln tail flue gas chambers and incineration hearths of the combined smelting furnace, ash temperature monitors are arranged in blanking pipes, and the pressure monitors, the temperature monitors, the flow monitors and the ash temperature monitors are respectively connected with an external computer control system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920195762.XU CN209876947U (en) | 2019-02-14 | 2019-02-14 | Combined smelting furnace for treating arsenic alkali slag and low-melting-point heavy metal waste slag |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920195762.XU CN209876947U (en) | 2019-02-14 | 2019-02-14 | Combined smelting furnace for treating arsenic alkali slag and low-melting-point heavy metal waste slag |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708125A (en) * | 2019-02-14 | 2019-05-03 | 长沙中硅水泥技术开发有限公司 | A kind of processing arsenic alkaline slag and low-melting heavy metal waste residue combined type smelting furnace |
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2019
- 2019-02-14 CN CN201920195762.XU patent/CN209876947U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708125A (en) * | 2019-02-14 | 2019-05-03 | 长沙中硅水泥技术开发有限公司 | A kind of processing arsenic alkaline slag and low-melting heavy metal waste residue combined type smelting furnace |
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Address after: 410075 D-244, No. 199 Lugu Road, Lugu Lu, high tech Zone, Changsha, Hunan Patentee after: Changsha Zhongsi Environmental Protection Technology Co., Ltd Address before: 410075 D-244, No. 199 Lugu Road, Lugu Lu, high tech Zone, Changsha, Hunan Patentee before: Changsha silicon cement technology development Co Ltd |