CN210069862U - Electrolytic aluminum solid waste coupling type incineration treatment system - Google Patents
Electrolytic aluminum solid waste coupling type incineration treatment system Download PDFInfo
- Publication number
- CN210069862U CN210069862U CN201920861086.5U CN201920861086U CN210069862U CN 210069862 U CN210069862 U CN 210069862U CN 201920861086 U CN201920861086 U CN 201920861086U CN 210069862 U CN210069862 U CN 210069862U
- Authority
- CN
- China
- Prior art keywords
- incinerator
- half part
- heat transfer
- coupled
- solid waste
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Electrolytic Production Of Metals (AREA)
Abstract
The embodiment of the utility model discloses electrolytic aluminum solid waste coupled incineration disposal system, include: the first waste crushing system, the first feeding system, the lower half part of the incinerator and the deslagging system are connected in sequence; the second waste crushing system, the second feeding system, the upper part of the incinerator and the cryolite recovery system are connected in sequence; still include manifold air heater, manifold air heater's exhanst gas outlet and gas entry are connected with smoke exhaust system and combustion-supporting air system respectively, manifold air heater's gas inlet connection burn first one with burn the export of burning furnace lower half, manifold air heater's gas outlet connection burn first one and burn the import of burning furnace lower half, the utility model discloses the high efficiency has realized solid waste's minimizing, innoxious and resourceization.
Description
Technical Field
The embodiment of the utility model provides a relate to waste treatment technical field, concretely relates to electrolytic aluminum solid waste coupled incineration disposal system.
Background
The solid waste generated by the electrolytic aluminum mainly comprises overhaul waste and anode carbon residue. Because the waste materials are corroded by electrolyte liquid under the condition of long-term high temperature, the overhaul waste materials after the groove is stopped contain a large amount of soluble cyanides and fluorides and belong to harmful substances. The carbon content in the overhaul waste exceeds 60 percent, the balance is cryolite, heat-insulating and fireproof materials, and a small amount of harmful cyanide and fluoride, belonging to dangerous waste; the anode carbon residue contains more than 60 percent of cryolite and no cyanide and fluoride, and belongs to common solid waste. At present, the solid wastes are treated by landfill and stockpiling methods in the electrolytic aluminum plant, and the contained soluble cyanide and fluoride can be transferred or volatilized into the atmosphere under the actions of wind blowing, sun drying and rain, or can infiltrate into the underground along with rainwater and mix into rivers to pollute soil and underground water, so that great damage is generated to animals, plants and human bodies, the ecological environment is destroyed, and if the harmless treatment is not carried out in time, the damage is long-term.
Therefore, the harmless conversion treatment or the recycling comprehensive utilization of the electrolytic cell overhaul residues must be developed by means of technological progress, so that the electrolytic aluminum industry can meet the requirements of relevant national environmental protection policies, the harmonious sustainable development of the electrolytic aluminum industry is realized, the environment is improved, and the society is benefited.
SUMMERY OF THE UTILITY MODEL
Therefore, the embodiment of the utility model provides an electrolytic aluminum solid waste coupled incineration disposal system to solve among the prior art because electrolytic aluminum solid waste burns the effective recycle of material energy in the processing procedure, cause environmental pollution scheduling problem.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
an electrolytic aluminum solid waste coupling type incineration disposal system, comprising:
the first waste crushing system, the first feeding system, the lower half part of the incinerator and the deslagging system are connected in sequence;
the second waste crushing system, the second feeding system, the upper part of the incinerator and the cryolite recovery system are connected in sequence;
the incinerator comprises an incinerator body and is characterized by further comprising a coupled air preheater, a smoke outlet and a fuel gas inlet of the coupled air preheater are respectively connected with a smoke exhaust system and a combustion-supporting air system, a smoke inlet of the coupled air preheater is connected with outlets of the upper half portion of the incinerator and the lower half portion of the incinerator, and a fuel gas outlet of the coupled air preheater is connected with inlets of the upper half portion of the incinerator and the lower half portion of the incinerator.
The embodiment of the utility model is also characterized in that a separation structure is arranged at the separation part of the lower half part of the incinerator and the upper half part of the incinerator; the lower incinerator half part and the upper incinerator half part are combined to form a coupled incinerator structure, and the lower incinerator half part and the upper incinerator half part are in thermal communication.
The embodiment of the utility model is further characterized in that, the separation structure comprises a heat transfer plate arranged between the lower half part of the incinerator and the upper half part of the incinerator, a heat transfer channel for realizing the air flow circulation between the lower half part of the incinerator and the upper half part of the incinerator is arranged between the heat transfer plate and the separation part of the incinerator, the heat transfer channel comprises a first heat transfer channel positioned between two feed inlets of the lower half part of the incinerator and the upper half part of the incinerator, and a second heat transfer channel positioned between two discharge outlets of the lower half part of the incinerator and the upper half part of the incinerator; the upper feeding hole and the lower feeding hole are respectively connected with a second feeding system and a first feeding system, and the upper discharging hole and the lower discharging hole are respectively connected with the cryolite recovery system and the slag discharge system.
The utility model discloses the characteristic still lies in first heat transfer passageway upper end is provided with the striker plate of installing at burning furnace first lateral wall, just the striker plate is located burn the below of burning furnace first feed inlet, be provided with a plurality of ventilative sieve meshes on the striker plate.
The utility model discloses the characteristic still lies in, combustion-supporting air system be used for providing low temperature wind extremely coupled air preheater, burn first one of burning furnace with burn burning furnace lower half exhaust high temperature flue gas process coupled air preheater forms low temperature flue gas after the cooling of low temperature wind is followed the system of discharging fume discharges, low temperature wind is discharged into after being heated by high temperature flue gas in coupled air preheater burn first one of burning furnace with burn in the burning furnace lower half.
The utility model discloses the characteristic still lies in, burn the top of burning furnace first half discharge gate and be provided with the gas outlet with the flue gas import intercommunication, burn the below of burning furnace lower half discharge gate and be provided with the air inlet with gas outlet intercommunication.
The embodiment of the utility model provides a have following advantage:
(1) the utility model discloses a solid waste's minimizing: high-content carbon in the overhaul waste is used as fuel, the high-content carbon is completely combusted to generate flue gas, and heat is released to heat anode carbon slag; high-content cryolite in the anode carbon slag is heated, melted and recycled, and a small part of carbon in the anode carbon slag is heated and combusted to generate hot flue gas to be discharged; the two parts of hot flue gas are collected to heat combustion-supporting air of the incinerator; only 10% -20% of the solid waste in the whole system is discharged, and the solid waste is reduced by 80% -90%;
(2) the utility model discloses a solid waste's innoxiousness: the total cyanide of the overhaul waste is converted into harmless substances at high temperature in the incineration process, fluoride escapes in a gas form in the incineration and heating processes, and is returned to the existing fluorine-containing flue gas treatment system of an electrolytic aluminum plant through a smoke exhaust system, and fluorine is adsorbed by an alumina powder adsorption method to be recycled as a raw material, so that the harmless treatment of waste is realized;
(3) the utility model discloses a solid waste's resourceization: high-content carbon in the overhaul waste is used as fuel, and high-content cryolite in the anode carbon residue is heated and recovered; returning the fluorine-containing flue gas to the existing flue gas treatment system, and adsorbing the fluorine-containing flue gas by using alumina powder to be used as a raw material for recycling; the cryolite, fluorine element and carbon element in the waste are effectively utilized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the overall structure of the incinerator of the present invention;
fig. 3 is an enlarged schematic structural diagram of a in fig. 2 according to the present invention;
fig. 4 is an enlarged schematic structural view of B in fig. 2 according to the present invention;
fig. 5 is a schematic structural diagram of C in fig. 1 according to the present invention.
In the figure:
1-a smoke exhaust system; 2-combustion-supporting air system; 3-a coupled air preheater; 4-the upper part of the incinerator; 5-a cryolite recovery system; 6-a first waste material crushing system; 7-a first feeding system; 8-lower incinerator half; 9-a slag discharge system; 10-a second waste crushing system; 11-a second feeding system; 12-incinerator partitions; 13-a separation structure; 14-heat transfer plates; 15-a feed inlet; 16 — a first heat transfer channel; 17-a discharge hole; 18-a second heat transfer channel; 19-a striker plate; 20-ventilating sieve pores; 21-a filtrate layer; 22-a liquid guiding layer; 23-liquid through hole; 24-edge bevel; 25-pipeline connecting port; 26-a gas pressure sensor; 27-an electromagnetic valve; 28-air outlet; 29-an air inlet;
301-flue gas outlet; 302-gas inlet; 303-flue gas inlet; 304-gas outlet.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the electrolytic aluminum production process, two kinds of solid wastes (overhaul waste and anode carbon residue) are mainly generated and are generally subjected to secondary treatment due to harmful substances, but the two kinds of substances are mixed or separately incinerated in a conventional manner, so that a large amount of incinerating materials are required.
As shown in figure 1, the main idea of the utility model is to provide an energy-saving electrolytic aluminum solid waste coupled incineration system, the main idea is to divide the incinerator into an upper part and a lower part according to the characteristics of substances contained in two wastes, the upper part is used for recovering anode carbon slag containing more cryolite, the lower part is used for incinerating and treating overhaul waste containing more carbon, so as to save a large amount of incineration materials. Aims to realize the reduction, the harmlessness and the reclamation of the solid waste.
Although the overhaul waste also contains part of the cryolite, the energy consumption required for the recovery of the cryolite (melting point is 1009 ℃) is far lower than the recovery cost, so the recovery is not necessary.
Specifically, as shown in fig. 1 to 5, the incineration disposal system includes a first waste crushing system 6 for disposing overhaul waste, a first feeding system 7, an incinerator lower half 8 and a slag discharge system 9, which are connected in series. The overhaul waste is crushed by a pipeline and then is sent into the lower half part 8 of the incinerator, and the waste slag generated by combustion is discharged from a slag discharging system 9.
The device also comprises a second waste material crushing system 10, a second feeding system 11, an upper part 4 of the incinerator and a cryolite recovery system 5 which are connected in sequence and used for treating the anode carbon slag. The anode carbon residue is crushed by a pipeline and then is sent to the upper half part 4 of the incinerator. The cryolite solution burned in the upper half part 4 of the incinerator is recycled by a cryolite recycling system 5.
If the high-temperature flue gas generated by burning the upper half part 4 and the lower half part 8 of the incinerator is directly discharged into the atmosphere, the high-temperature flue gas not only causes heat waste, but also easily causes pollution to the air, the fluorine-containing flue gas is directly discharged to pollute the environment, and carbon elements contained in overhaul waste and anode carbon slag are not effectively utilized, so that energy loss is caused.
Because the combustion effect of the overhaul waste is certainly not as good as that of the common fuel, in order to achieve a better combustion effect, as shown in fig. 1, the embodiment adds a coupled air preheater 3 and a combustion-supporting air system 2 to the incineration system, and the specific connection relationship in the system is as follows:
The flue gas inlet 303 of the coupling air preheater 3 is connected with the outlets of the upper incinerator half 4 and the lower incinerator half 8, and the gas outlet 304 of the coupling air preheater 3 is connected with the inlets of the upper incinerator half 4 and the lower incinerator half 8. The combustion-supporting air system 2 sends low-temperature air into the upper part 4 of the incinerator and the lower part 8 of the incinerator respectively after warming up through the coupled air preheater 3, high-temperature flue gas generated by the upper part 4 of the incinerator and the lower part 8 of the incinerator is discharged after being cooled through the coupled air preheater 3, and the coupled air preheater 3 recovers heat generated by combustion of the upper part 4 of the incinerator and the lower part 8 of the incinerator and is used for heating the low-temperature air. The operation can realize reasonable recycling of carbon elements in the overhaul waste and the anode carbon slag, and the utilization rate of energy is improved.
The main function of the combustion-supporting air system 2 is to provide air volume into the incinerator to achieve combustion-supporting effect, but in order to make the provided air volume not generate too large negative effect on the temperature of the incinerator, the air volume or air flow with higher temperature needs to be provided, if high-temperature air is provided directly from the outside, the cost is higher, therefore, the coupled air preheater 3 of the embodiment mainly has the following points:
firstly, the temperature of high-temperature flue gas discharged by the incinerator (the upper incinerator half part 4 and the lower incinerator half part 8) is reduced;
secondly, make combustion-supporting air system 2 can provide low temperature wind, low temperature wind obtains the high temperature wind that gets into the burning furnace through the heat transfer effect in the high temperature flue gas at coupling type air heater 3, and simultaneously, the temperature of high temperature flue gas also obtains reducing.
The coupled air preheater 3 can well recycle the high-temperature heat of the incinerator, thereby greatly saving energy.
The total cyanide of the overhaul waste is converted into harmless substances at high temperature in the incineration process, fluoride escapes in a gas form in the incineration and heating processes, and is returned to the existing fluorine-containing flue gas treatment system of an electrolytic aluminum plant through a smoke exhaust system, and fluorine is adsorbed by an alumina powder adsorption method to be recycled as a raw material, so that the harmless treatment of waste is realized; high-content carbon in the overhaul waste is used as fuel, and high-content cryolite in the anode carbon residue is heated and recovered; returning the fluorine-containing flue gas to the existing flue gas treatment system, and adsorbing the fluorine-containing flue gas by using alumina powder to be used as a raw material for recycling; the cryolite, fluorine element and carbon element in the waste are effectively utilized. In general, the system of the utility model can utilize the high-content carbon in the overhaul waste as fuel, the high-content carbon is completely combusted to generate flue gas, and heat is released to heat the anode carbon residue; high-content cryolite in the anode carbon slag is heated, melted and recycled, and a small part of carbon in the anode carbon slag is heated and combusted to generate hot flue gas to be discharged; the two parts of hot flue gas are collected to heat combustion-supporting air of the incinerator; only 10% -20% of the solid waste in the whole system is discharged, and the solid waste is reduced by 80% -90%.
In order to further improve the recycling efficiency of the coupled incineration disposal system to energy. In another embodiment, the lower incinerator half 8 and the upper incinerator half 4 are combined to form a coupled incinerator structure, and the lower incinerator half 8 and the upper incinerator half 4 are in thermal communication. At the inside formation thermal circulating air current of burning furnace lower half 8 and burning furnace upper half 4, can improve the utilization ratio of energy as far as possible on the one hand, on the other hand, the circulating air current that forms helps throwing into the dehumidification and the raise of burning furnace lower half 8 and burning furnace upper half 4 middle and large repair waste material and positive pole charcoal sediment, improves the combustion rate of material. Specifically, the method comprises the following steps:
the incinerator lower half 8 and the incinerator upper half 4 are provided with a partition structure 13 at an incinerator partition 12. The partition structure 13 includes a heat transfer plate 14 disposed between the lower incinerator half 8 and the upper incinerator half 4, a heat transfer channel for realizing air flow communication between the lower incinerator half 8 and the upper incinerator half 4 is disposed between the heat transfer plate 14 and the incinerator partition 12, and the heat transfer channel includes a first heat transfer channel 16 located between two feed ports 15 of the lower incinerator half 8 and the upper incinerator half 4, and a second heat transfer channel 18 located between two feed ports 17 of the lower incinerator half 8 and the upper incinerator half 4. The upper feeding hole 15 and the lower feeding hole 15 are respectively connected with the second feeding system 11 and the first feeding system 7, and the upper discharging hole 17 and the lower discharging hole 17 are respectively connected with the cryolite recovery system 5 and the slag discharge system 9. An air outlet 28 communicated with a flue gas inlet 303 is arranged above the discharge port 17 of the upper incinerator half part 4, and an air inlet 29 communicated with a fuel gas outlet 304 is arranged below the discharge port 17 of the lower incinerator half part 8. Two feed ports 15 and two discharge ports 17 are located opposite the lower incinerator half 8 and the upper incinerator half 4, respectively.
This embodiment improves the inner structure of burning furnace to adapt to this whole incineration disposal process, in order to extremely increase incineration disposal effect as far as possible, in order to overcome the defect that utilizes overhaul waste material to compare normal fuel and exist as fuel, this also is for generally not adopting among the prior art the utility model discloses this kind of incineration disposal mode need attack the technological problem who restricts.
The heat transfer plate 14 is divided into the lower incinerator half 8 and the upper incinerator half 4, the heat transfer plate 14 is in direct contact with the raw material anode carbon slag needing to recover cryolite, and the heat transfer effect is good.
The conventional idea is that the heat transfer plate necessarily separates the lower incinerator half 8 from the upper incinerator half 4 completely, but in the embodiment, a channel for heat transfer is opened between the heat transfer plate 14 and the incinerator wall, which is the above-mentioned first heat transfer channel 16 and second heat transfer channel 18, and the combustion-supporting air is introduced into the lower incinerator half 8 from the air inlet 29 below the second heat transfer channel 18, and at this time, the combustion-supporting air will flow towards one side of the first heat transfer channel 16, and the following air flow circulation is formed:
an air inlet 29, an incinerator lower half 8, a first heat transfer channel 16, an incinerator upper half 4, a second heat transfer channel 18, and an incinerator lower half 8.
The gas flow circulation of the present embodiment is only partially circulating because there is also a portion that accompanies the high temperature flue gas discharge.
The formed circulating airflow makes the fuel fully contact, and reduces energy loss.
Besides, through the air current of first heat transfer passageway 16 department, can also play certain dispersion to the fuel that gets into burning furnace lower half 8 and the reclaimed materials that gets into burning furnace first 4, the air current can make the material that is located two feed inlets 15 fly upward, improve material combustion efficiency, especially burn the positive pole charcoal sediment material after burning furnace first 4 is smashed, in order to avoid fuel too much piling up 15 departments, cause the inhomogeneous problem of combustion heat distribution, can avoid the too much piling up 15 departments at the feed inlet of positive pole charcoal sediment material equally, cause the insufficient problem of recovery processing.
Because the whole incinerator is in a relatively closed state, heat can be circulated in the whole incinerator to a certain extent, and therefore the main function of the circulating air flow is still acted on the anode carbon residue material.
In order to prevent the material above the first heat transfer channel 16 from falling into the lower part of the incinerator 8 under the action of gravity, the upper end of the first heat transfer channel 16 is provided with a baffle plate 19 arranged on the side wall of the upper part 4 of the incinerator, the baffle plate 19 is positioned below the feed inlet of the upper part 4 of the incinerator, the baffle plate 19 is provided with a plurality of ventilating sieve holes 20, the radius of the ventilating sieve holes 20 is not enough to fall a large amount of anode carbon residue materials, and even if a small part of the anode carbon residue materials fall into the lower part, no influence is caused.
The ventilation sieve mesh 20 limit main function is when making hot-blast the passing through ventilation sieve mesh 20 who follows supreme down in the first heat transfer passageway 16 carry out the drying to the positive pole carbon sediment that gets into by burning furnace first 4 feed inlet 15, because the effect of air current, raises the inside of burning furnace first 4 with positive pole carbon sediment, increases its area of contact with the air, improves combustion efficiency.
In the present embodiment, the first heat transfer channel 16 and the second heat transfer channel 18 do not need to be the width of the entire incinerator side wall (assuming the incinerator is of a square configuration), and the width need only be such as to facilitate the air flow circulation, for example: the width is 3-10cm, and the specific width is determined according to the size of the incinerator.
Meanwhile, in order to make the high-temperature air have a better reciprocating circulation effect for many times at the upper incinerator half part 4 and the lower incinerator half part 8 and improve the heat utilization rate, the coupled incineration treatment system can also be provided with an electromagnetic valve 27 at the air outlet 28, the controller is electrically connected with an air pressure sensor 26 and the electromagnetic valve 27 for controlling the on-off of the air outlet 28, and the air pressure sensor 26 is arranged in the upper incinerator half part 4. The pressure sensor 26 is used to monitor the pressure inside the upper section 4 of the incinerator and send a signal to the controller, when the pressure exceeds the preset threshold value of the controller, the controller will instruct the air outlet 28 to open and discharge the high temperature flue gas into the flue gas inlet 303 of the coupled air preheater 3.
Considering the high temperature, this results in the need of the electromagnetic valve 27, the air pressure sensor 26, etc. with high temperature resistance to be able to achieve the above purpose, and therefore, the intermittent control of the opening and closing of the air outlet 28 by the electromagnetic valve 27 is an alternative scheme.
Considering the high temperature, the electromagnetic valve 27 and the air pressure sensor 26 may be disposed at the outlet of the coupled air preheater 3 or the inlet of the smoke exhaust system 1, and the corresponding controller may be disposed on the coupled air preheater 3 or the smoke exhaust system 1, where the specific location is not specifically required. The controller can be a conventional singlechip, microprocessor, etc.
Considering that the cryolite needs to be filtered out from the high-temperature cryolite melt slurry in the recycling process, the process can utilize the high temperature generated in the process of overhauling the waste combustion at the lower half part 8 of the incinerator, so the heat transfer plate 14 is improved as follows:
the heat transfer plate 14 is inclined downwards along the feeding port 15 of the upper incinerator half 4 towards the discharging port 17 of the upper incinerator half 4, which is beneficial to the flow guide of the cryolite molten slurry. And be provided with the drainage chamber subassembly that is arranged in leading out the liquid cryolite after melting to cryolite recovery system 5 pipeline connector 25 in above heat transfer plate 14, pipeline connector 25 connects the discharge gate 17 of burning furnace upper half 4, and drainage chamber subassembly is including the honeycomb opening cavity of being covered with whole heat transfer plate 14 top, and honeycomb opening cavity includes the filtrate layer 21 (being equivalent to the top casing of drainage chamber subassembly) that distributes from top to bottom respectively and leads liquid layer 22 with the upper surface matching connection of heat transfer plate 14.
The upper surface of the filtrate layer 21 is inclined in the same direction as the heat transfer plate 14 at an angle slightly smaller than that of the heat transfer plate 14 so that the cryolite solution flows slowly. The upper surface of the filtrate layer 21 may be horizontally disposed. The cryolite slurry is first filtered by the filtrate layer 21, enters the liquid guide layer 22 and flows out from the surface of the heat transfer plate 14. A plurality of liquid through holes 23 are uniformly distributed on the filter layer 21, the edge of each liquid through hole 23 is provided with an edge inclined plane 24 inclined towards the center direction of the liquid through hole 23, and the inner surface of each liquid through hole 23 is similar to an inverted frustum pyramid shape. This design facilitates the filtrate on the one hand and reduces the loss of energy from the surface of the heat transfer plates 14 on the other hand. The liquid guide layer 22 is connected to the discharge port 17 of the upper incinerator half 4 through a pipe connection port 25 at the end close to the discharge port 17 of the upper incinerator half 4. The cryolite slurry smoothly flows into the discharge port 17 from the pipe connection port 25.
In this embodiment, it is not necessary to consider that the liquid through holes 23 are blocked by the slag after the anode carbon slag treatment, and the liquid cryolite can gradually permeate from the liquid through holes 23 to the liquid guide layer 22 in the drainage cavity assembly.
In the present embodiment, the heat transfer plate 14 itself may be used as the liquid guide layer 22.
Preferably, the end of the heat transfer plate 14 close to the discharge port 17 of the upper incinerator half 4 is provided with a lowest point (not shown) opposite to the surface of the heat transfer plate 14, and the port of the pipe connecting port 25 is communicated with the lowest point, so that the cryolite solution is smoothly converged to the lowest point and flows out from the pipe connecting port 25.
As a preferred embodiment, the device of the present invention can realize waste treatment by the following steps:
s100, feeding: crushing overhaul waste and anode carbon residue materials, and respectively feeding the materials to the upper half part and the lower half part of the incinerator;
s200, combustion: the combustion-supporting air system heats low-temperature air through a coupled air preheater and then sends the low-temperature air into the upper half part and the lower half part of the incinerator;
s300, heat recycling: the high-temperature flue gas generated by the incinerator is discharged after being cooled by the coupling type air preheater, and the coupling type air preheater recovers heat generated by combustion of the incinerator and is used for heating the low-temperature air;
s400, product recovery: the anode carbon residue material is combusted to generate molten liquid cryolite which is recovered by a cryolite recovery system.
The utility model has the advantages of it is following:
(1) reduction of solid waste: high-content carbon in the overhaul waste is used as fuel, the high-content carbon is completely combusted to generate flue gas, and heat is released to heat anode carbon slag; high-content cryolite in the anode carbon slag is heated, melted and recycled, and a small part of carbon in the anode carbon slag is heated and combusted to generate hot flue gas to be discharged; the two parts of hot flue gas are collected to heat combustion-supporting air of the incinerator; only 10% -20% of the solid waste in the whole system is discharged, and the solid waste is reduced by 80% -90%;
(2) harmlessness of solid waste: the total cyanide of the overhaul waste is converted into harmless substances at high temperature in the incineration process, fluoride escapes in a gas form in the incineration and heating processes, and is returned to the existing fluorine-containing flue gas treatment system of an electrolytic aluminum plant through a smoke exhaust system, and fluorine is adsorbed by an alumina powder adsorption method to be recycled as a raw material, so that the harmless treatment of waste is realized;
(3) resource utilization of solid waste: high-content carbon in the overhaul waste is used as fuel, and high-content cryolite in the anode carbon residue is heated and recovered; returning the fluorine-containing flue gas to the existing flue gas treatment system, and adsorbing the fluorine-containing flue gas by using alumina powder to be used as a raw material for recycling; the cryolite, fluorine element and carbon element in the waste are effectively utilized.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (6)
1. An electrolytic aluminum solid waste coupling type incineration disposal system, comprising:
a first waste crushing system (6), a first feeding system (7), an incinerator lower half part (8) and a slag discharging system (9) which are connected in sequence;
and a second waste material crushing system (10), a second feeding system (11), an incinerator upper half part (4) and a cryolite recovery system (5) which are connected in sequence;
the method is characterized in that: the incinerator is characterized by further comprising a coupling type air preheater (3), a smoke exhaust system (1) and a combustion-supporting air system (2) are connected to a smoke outlet (301) and a fuel gas inlet (302) of the coupling type air preheater (3) respectively, a smoke inlet (303) of the coupling type air preheater (3) is connected with outlets of the upper incinerator half part (4) and the lower incinerator half part (8), and a fuel gas outlet (304) of the coupling type air preheater (3) is connected with inlets of the upper incinerator half part (4) and the lower incinerator half part (8).
2. The coupled incineration treatment system for the electrolytic aluminum solid waste according to claim 1, wherein: a partition structure (13) is arranged at the incinerator partition (12) between the lower incinerator half part (8) and the upper incinerator half part (4); the lower incinerator half part (8) and the upper incinerator half part (4) are combined to form a coupled incinerator structure, and the lower incinerator half part (8) is in thermal communication with the upper incinerator half part (4).
3. The coupled incineration treatment system for the electrolytic aluminum solid waste according to claim 2, wherein: the separation structure (13) comprises a heat transfer plate (14) arranged between the lower incinerator half part (8) and the upper incinerator half part (4), a heat transfer channel for realizing airflow circulation between the lower incinerator half part (8) and the upper incinerator half part (4) is arranged between the heat transfer plate (14) and the incinerator separation part (12), and the heat transfer channel comprises a first heat transfer channel (16) positioned between the two feed inlets (15) of the lower incinerator half part (8) and the upper incinerator half part (4) and a second heat transfer channel (18) positioned between the two feed outlets (17) of the lower incinerator half part (8) and the upper incinerator half part (4); the upper feeding hole (15) and the lower feeding hole (15) are respectively connected with the second feeding system (11) and the first feeding system (7), and the upper discharging hole (17) and the lower discharging hole (17) are respectively connected with the cryolite recovery system (5) and the slag discharge system (9).
4. The coupled incineration treatment system for the electrolytic aluminum solid waste according to claim 3, wherein: the upper end of the first heat transfer channel (16) is provided with a baffle plate (19) arranged on the side wall of the upper part (4) of the incinerator, the baffle plate (19) is positioned below a feed inlet of the upper part (4) of the incinerator, and a plurality of ventilation sieve holes (20) are arranged on the baffle plate (19).
5. The coupled incineration treatment system for the electrolytic aluminum solid waste according to claim 1, wherein: the combustion-supporting air system (2) is used for providing low-temperature air to the coupled air preheater (3), high-temperature flue gas discharged from the upper part (4) of the incinerator and the lower part (8) of the incinerator passes through the coupled air preheater (3) and is cooled by low-temperature air to form low-temperature flue gas, the low-temperature flue gas is discharged from the smoke discharge system (1), and the low-temperature air is heated by the high-temperature flue gas in the coupled air preheater (3) and then is discharged into the upper part (4) of the incinerator and the lower part (8) of the incinerator.
6. The coupled incineration treatment system for the electrolytic aluminum solid waste according to claim 3, wherein: an air outlet (28) communicated with a flue gas inlet (303) is arranged above a discharge port (17) of the upper half part (4) of the incinerator, and an air inlet (29) communicated with a fuel gas outlet (304) is arranged below the discharge port (17) of the lower half part (8) of the incinerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920861086.5U CN210069862U (en) | 2019-06-10 | 2019-06-10 | Electrolytic aluminum solid waste coupling type incineration treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920861086.5U CN210069862U (en) | 2019-06-10 | 2019-06-10 | Electrolytic aluminum solid waste coupling type incineration treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210069862U true CN210069862U (en) | 2020-02-14 |
Family
ID=69456801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920861086.5U Active CN210069862U (en) | 2019-06-10 | 2019-06-10 | Electrolytic aluminum solid waste coupling type incineration treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210069862U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173696A (en) * | 2019-06-10 | 2019-08-27 | 龙科天成(厦门)科技有限公司 | A kind of electrolytic aluminium solid waste manifold type burning processing system and method |
-
2019
- 2019-06-10 CN CN201920861086.5U patent/CN210069862U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173696A (en) * | 2019-06-10 | 2019-08-27 | 龙科天成(厦门)科技有限公司 | A kind of electrolytic aluminium solid waste manifold type burning processing system and method |
| CN110173696B (en) * | 2019-06-10 | 2024-07-26 | 龙科天成(厦门)科技有限公司 | Electrolytic aluminum solid waste coupling type incineration treatment system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100565009C (en) | Can realize the garbage burning processing method and the device of dioxin and dust zero discharge | |
| CN108980847B (en) | A kind of rubbish charing burning treatment process | |
| CN206037062U (en) | Rubbish pulverizes incineration treatment device | |
| CN209042392U (en) | A kind of pyrolysis system utilized with tail gas recycle | |
| CN106322439B (en) | A kind of normal pressure smokeless environment-friendly combustion stove | |
| CN103302079B (en) | Comprehensive treatment and utilization method of aluminum smelting fluorine-carbon hazardous solid wastes | |
| CN204085215U (en) | A kind of electrical arc furnace flue gas waste heat utilization device | |
| CN205424936U (en) | Vertical pyrolysis gasifier | |
| CN210069862U (en) | Electrolytic aluminum solid waste coupling type incineration treatment system | |
| CN109609149A (en) | Waste lithium cell recovery and processing system and processing method | |
| CN211255815U (en) | Small cabinet type garbage low-temperature pyrolysis system | |
| CN216244281U (en) | Low-calorific-value garbage smoldering treatment system based on coal-fired unit | |
| CN107606623B (en) | Small garbage gas-carbon complementary carbonization combustion furnace | |
| CN207230506U (en) | A kind of novel environment friendly steam boiler | |
| CN108862974B (en) | Oil sludge treatment system and method | |
| CN1891841B (en) | Regenerative lead processing method and apparatus | |
| CN209242990U (en) | A kind of pyrolysis system with flue-gas temperature regulatory function | |
| CN202543289U (en) | Device for extracting vanadium by three-step method | |
| CN111089299A (en) | Waste lithium battery cracking waste gas purification system | |
| CN110173696B (en) | Electrolytic aluminum solid waste coupling type incineration treatment system and method | |
| CN206540426U (en) | High-temperature smoke hot-cast socket and dedusting taste removal system | |
| CN206094168U (en) | Burning furnace utensil is fired in smokeless environmental protection of ordinary pressure | |
| CN210861115U (en) | Sludge combustion system of waste incineration power plant | |
| CN211226871U (en) | Sludge blending combustion system of thermal power plant | |
| CN204079732U (en) | Mud is converted into the treatment facility system of building materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: No. 68, Shangcuo Pancuoli, Wuxian Town, Tong'an District, Xiamen City, Fujian Province, 361000 Patentee after: Longke Tiancheng (Xiamen) Technology Co.,Ltd. Address before: 361000 room 110, building a, talent entrepreneurship Park, No. 2002, Tongji Road, Tong'an District, Xiamen City, Fujian Province Patentee before: Longke Tiancheng (Xiamen) Technology Co.,Ltd. |