CN211716582U - Flue gas incineration system and aluminum scrap pretreatment system - Google Patents

Abstract

The utility model provides a flue gas burns system and aluminium bits pretreatment system. The flue gas incineration system comprises: the incinerator is internally provided with a combustion chamber and a first heat exchange chamber which are communicated; the incinerator is provided with a flue gas inlet communicated with the first heat exchange chamber, and flue gas enters the combustion chamber after being preheated by the first heat exchange chamber; the inside of air recuperative furnace is equipped with the second heat transfer room that is linked together with the combustion chamber, has seted up combustion-supporting gas import on the air recuperative furnace, and combustion-supporting gas gets into the second heat transfer room through combustion-supporting gas import, and the flue gas after burning preheats combustion-supporting gas, makes in the combustion chamber combustion-supporting gas who preheats the flue gas. The utility model provides a flue gas burns system preheats through treating respectively burning flue gas and combustion-supporting gas, directly utilizes the flue gas waste heat to realize twice heat transfer, has reduced the heat loss of high temperature flue gas to reduce the fuel of the required consumption of combustion chamber, with play energy saving, cost-effective effect.

Description

Flue gas incineration system and aluminum scrap pretreatment system

Technical Field

The utility model relates to an automobile manufacturing technical field particularly, relates to a flue gas burns system and including above-mentioned flue gas system of burning aluminium bits pretreatment system.

Background

At present, aluminum product enterprises such as aluminum alloy hubs and the like can generate a large amount of aluminum scraps every day, the aluminum scraps are recycled and generally need to be collected, crushed, dewatered, dried, deironized, remelted by aluminum scraps and the like, a machining workshop generates a large amount of aluminum scraps every day, the aluminum scraps are timely framed and collected to be recycled, and the phenomenon that a large amount of aluminum scraps are accumulated to occupy sites and funds is avoided. The existing aluminum scrap pretreatment system can generate more smoke in the drying treatment process, the smoke contains organic volatile matters such as cutting fluid and lubricating oil, and is easy to cause environmental pollution.

And some existing aluminum scrap pretreatment systems are provided with waste heat recycling devices, so that burned flue gas is collected but cannot be fully utilized.

SUMMERY OF THE UTILITY MODEL

In order to improve at least one of the above technical problems, an object of the present invention is to provide a flue gas incineration system for an aluminum scrap pretreatment system.

Another object of the utility model is to provide an including above-mentioned flue gas system of burning's aluminium bits pretreatment system.

In order to achieve the above object, the utility model discloses technical scheme of the first aspect provides a flue gas incineration system of aluminium bits pretreatment system, include: the incinerator is internally provided with a combustion chamber and a first heat exchange chamber which are communicated; a flue gas inlet is formed in the side wall of the incinerator and used for enabling flue gas generated by an aluminum scrap pretreatment system during aluminum scrap drying to enter the incinerator, and the flue gas inlet is communicated with the first heat exchange chamber and used for enabling the flue gas to enter the combustion chamber after being preheated by the first heat exchange chamber; the air heat exchange furnace is internally provided with a second heat exchange chamber, and the second heat exchange chamber is communicated with the combustion chamber; the side wall of the air heat exchange furnace is provided with a combustion-supporting gas inlet, a combustion-supporting gas outlet and a clean gas discharge port, the combustion-supporting gas inlet is used for enabling combustion-supporting gas to enter the second heat exchange chamber and preheating the combustion-supporting gas through burned flue gas, the preheated combustion-supporting gas is discharged through the combustion-supporting gas outlet, the incinerator is provided with a combustion-supporting gas inlet, the combustion-supporting gas inlet is connected with the combustion chamber and is connected with the combustion-supporting gas outlet, the preheated combustion-supporting gas is introduced into the combustion chamber, and the burned flue gas is discharged through the clean gas discharge port after heat exchange.

This scheme provides a flue gas system of burning, including burning furnace and air recuperative furnace. Wherein, the flue gas import has been seted up on the lateral wall that burns burning furnace, the flue gas in the stoving section of thick bamboo passes through in the flue gas import gets into burning furnace, burn the inside of burning furnace and be equipped with combustion chamber and first heat transfer room, first heat transfer room and flue gas import intercommunication, because the flue gas can produce the heat at the in-process that burns, it utilizes these heats to carry out the heat transfer for the first time to establish at the first heat transfer room that burns burning furnace, preheat the flue gas that gets into from the flue gas import, improve the temperature before the flue gas gets into the combustion chamber, thereby make the flue gas can burn completely in the combustion chamber, in order to get rid of. The incinerated flue gas enters the air heat exchange furnace, a combustion-supporting gas inlet is formed in the side wall of the air heat exchange furnace, for example, combustion-supporting gas such as air and oxygen enters the air heat exchange furnace through the combustion-supporting gas inlet, the incinerated flue gas is used for secondary heat exchange through a second heat exchange chamber arranged in the air heat exchange furnace, the combustion-supporting gas is preheated, the temperature of the combustion-supporting gas before entering the combustion chamber is improved, and therefore the auxiliary flue gas is fully combusted in the combustion chamber.

Like this, the flue gas system of burning that this scheme provided preheats through treating the flue gas of burning respectively to and preheat combustion-supporting gas, improve the temperature when treating to burn flue gas and combustion-supporting gas entering combustion chamber, can the corresponding fuel that reduces the required consumption of combustion chamber, and the cost is reduced, and the better temperature that keeps the combustion chamber, avoid causing the temperature fluctuation because of microthermal waiting to burn flue gas and flame retardant gas entering combustion chamber, ensure that harmful substance can fully burn and decompose, reduce harmful substance residue by a wide margin, reach the environmental protection emission requirement. Meanwhile, through secondary heat exchange, the heat of the flue gas can be more fully utilized, the use efficiency of the waste heat is improved, and the heat loss is reduced. Compared with the technical scheme that the flue gas after incineration is collected and then recycled, the flue gas incineration system provided by the scheme increases the heat exchange times of the flue gas, directly utilizes the waste heat of the flue gas, is high in comprehensive utilization rate, small in overall size and simple to operate, and has higher economic value and use value.

Additionally, the utility model provides an among the above-mentioned technical scheme flue gas system of burning can also have following additional technical characteristic:

in the technical scheme, the combustion chamber is columnar, the first heat exchange chamber is annular, the first heat exchange chamber is arranged around at least part of the periphery of the combustion chamber, the flue gas inlet is arranged at the bottom of the first heat exchange chamber, and the top of the first heat exchange chamber is communicated with the top of the combustion chamber; a preheating pipeline is arranged in the first heat exchange chamber, one end of the preheating pipeline is communicated with the flue gas inlet, and the other end of the preheating pipeline extends into the combustion chamber.

In the above technical solution, the preheating pipeline includes a preheating pipe; wherein the pre-heating tube comprises an S-shaped tube or the pre-heating tube comprises a helical tube.

In the above technical solution, a plurality of annular partition plates are arranged in the first heat exchange chamber at intervals along the axial direction of the first heat exchange chamber, and two adjacent annular partition plates are arranged in a staggered manner, so that a curved preheating channel is formed inside the first heat exchange chamber.

In any one of the above technical solutions, a plurality of sets of heat exchange fins are arranged in the air heat exchange furnace, and the plurality of sets of heat exchange fins are arranged in the second heat exchange chamber; and the heat exchange plate is provided with a heat exchange tube in a penetrating way, one end of the heat exchange tube is communicated with the combustion-supporting gas inlet, and the other end of the heat exchange tube is communicated with the combustion-supporting gas outlet.

In any of the above technical solutions, the air inlet is connected with an air inlet fan; and/or the combustion-supporting gas inlet is connected with a blower.

In any of the above technical solutions, the incinerator is provided with a temperature detection device and a pressure detection device.

In any of the above technical solutions, the flue gas incineration system further includes a communicating chamber, connected to the combustion chamber and the second heat exchange chamber, and located below the combustion chamber and the second heat exchange chamber; and an access hole is formed in the communicating cavity.

The utility model discloses technical scheme of second aspect provides an aluminium bits pretreatment system, include: the drying cylinder is provided with a smoke collecting hood; and the flue gas incineration system according to any one of the first technical solution, wherein a flue gas inlet of the flue gas incineration system is connected with the fume collecting hood.

The utility model discloses the aluminium bits pretreatment system that technical scheme of second aspect provided, because of including any one in the first aspect technical scheme flue gas burn the system, therefore have all beneficial effects that any above-mentioned technical scheme had, no longer describe here.

In the above technical solution, the aluminum scrap pretreatment system further includes: and the centrifugal separation device is connected with the drying cylinder and is used for performing solid-liquid separation on the aluminum scraps and liquid attached to the aluminum scraps before the aluminum scraps enter the drying cylinder.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a flue gas incineration system according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a flue gas incineration system according to an embodiment of the present invention;

FIG. 3 is a schematic view of the flue gas incineration system of FIG. 2 from one perspective;

FIG. 4 is a schematic top view of the flue gas incineration system shown in FIG. 2;

FIG. 5 is a schematic structural view of an incinerator according to an embodiment of the present invention;

FIG. 6 is a schematic view of the flow direction of flue gas in an incinerator according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of an air recuperator furnace according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an aluminum scrap pretreatment system according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of an aluminum scrap pretreatment system according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 9 is:

10, an incinerator; 11 a combustion chamber; 12 a first heat exchange chamber; 121 flue gas inlet; 13 an air inlet fan; 15 a pressure detection device; 16 a temperature detection device; 111 combustion supporting air inlet; 122 an annular partition;

20 air recuperative furnace; 21 a second heat exchange chamber; 211 a combustion supporting gas inlet; 212 combustion supporting gas outlet; 213 clean gas exhaust port; 22 a blower; 23 heat exchange fins; 24 heat exchange tubes;

30 a communication chamber; 31, a service hole;

100 of a storage hopper; 200 of a crusher; 300 a centrifugal separation device; 400 drying cylinder; 410 a fume collecting hood; 500 magnetic separator; 600 melting vortex chamber of aluminum scraps; 700 flue gas incineration system.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A flue gas incineration system and an aluminum scrap pretreatment system according to some embodiments of the present invention will be described below with reference to fig. 1 to 9.

Some embodiments of the present application provide a flue gas incineration system 700 of an aluminum scrap pretreatment system.

As shown in fig. 1 and 2, the flue gas incineration system 700 includes an incinerator 10 and an air heat-exchange furnace 20. Wherein, the inside of the incinerator 10 is provided with a combustion chamber 11 and a first heat exchange chamber 12 which are communicated; a flue gas inlet 121 is formed in the side wall of the incinerator 10, the flue gas inlet 121 is used for enabling flue gas generated by the aluminum scrap pretreatment system during aluminum scrap drying to enter the incinerator 10, and the flue gas inlet 121 is communicated with the first heat exchange chamber 12 and used for enabling the flue gas to enter the combustion chamber 11 after being preheated by the first heat exchange chamber 12; a second heat exchange chamber 21 is arranged inside the air heat exchange furnace 20, and the second heat exchange chamber 21 is communicated with the combustion chamber 11; a combustion-supporting gas inlet 211, a combustion-supporting gas outlet 212 and a clean gas discharge port 213 are formed in the side wall of the air heat exchange furnace 20, the combustion-supporting gas inlet 211 is used for enabling combustion-supporting gas to enter the second heat exchange chamber 21 so as to preheat the combustion-supporting gas through burned flue gas, the preheated combustion-supporting gas enters the combustion chamber 11 through the combustion-supporting gas outlet 212 and the combustion-supporting gas inlet 111 to support combustion of the flue gas, and the burned flue gas is discharged through the clean gas discharge port 213 after heat exchange.

Flue gas generated in the drying cylinder enters the first heat exchange chamber 12 through a flue gas inlet 121 formed in the incinerator 10, the flue gas is preheated in the first heat exchange chamber 12, and the preheated flue gas enters the combustion chamber 11 for incineration. The inside of air recuperative furnace 20 is equipped with the second heat transfer chamber 21 that is linked together with combustion chamber 11, and the flue gas after burning gets into in the second heat transfer chamber 21, has seted up combustion-supporting gas import 211 on the air recuperative furnace 11, and combustion-supporting gas gets into second heat transfer chamber 21 through combustion-supporting gas import 211, and the flue gas after burning preheats combustion-supporting gas, improves combustion-supporting gas's temperature to reduce the flue gas temperature after burning, and the flue gas that treats burning is combured in the combustion chamber 11 is got into to combustion-supporting gas through preheating.

The flue gas system 700 of burning that this embodiment provided, flue gas inlet 121 has been seted up on burning furnace 10's lateral wall, flue gas in the section of thick bamboo 400 of drying passes through flue gas inlet 121 and gets into burning furnace 10 in, the inside of burning furnace 10 is equipped with combustion chamber 11 and first heat transfer room 12, first heat transfer room 12 and flue gas inlet 121 intercommunication, because the flue gas can produce the heat at the in-process of burning, first heat transfer room 12 that establishes at burning furnace 10 utilizes these heats to carry out the heat transfer for the first time, preheat the flue gas that gets into from flue gas inlet 121, improve the temperature before the flue gas gets into combustion chamber 11, thereby make the flue gas can complete combustion in combustion chamber 11, in order to get rid of the harmful component in the flue gas. The incinerated flue gas enters the air heat exchange furnace 20, a combustion-supporting gas inlet 211 is formed in the side wall of the air heat exchange furnace 20, for example, combustion-supporting gas such as air, oxygen and the like enters the air heat exchange furnace 20 through the combustion-supporting gas inlet 211, the incinerated flue gas is used for secondary heat exchange through a second heat exchange chamber 21 arranged inside the air heat exchange furnace 20, the combustion-supporting gas is preheated, the temperature of the combustion-supporting gas before entering the combustion chamber 11 is increased, and therefore the auxiliary flue gas is fully combusted in the combustion chamber 11.

Like this, the flue gas incineration system 700 that this embodiment provided preheats through treating the flue gas of burning respectively, and preheat combustion-supporting gas, the temperature when improving to treat to burn flue gas and combustion-supporting gas entering combustion chamber 11, can correspondingly reduce the fuel that combustion chamber 11 consumed, and therefore the cost is reduced, and the better temperature that keeps combustion chamber 11, avoid causing the temperature fluctuation because of microthermal waiting to burn flue gas and combustion-supporting gas entering combustion chamber 11, ensure that harmful substance can fully burn and decompose, reduce harmful substance and remain by a wide margin, reach the environmental protection emission requirement. Meanwhile, through secondary heat exchange, the heat of the flue gas can be more fully utilized, the use efficiency of the waste heat is improved, and the heat loss is reduced. Compared with the embodiment that the waste heat recycling device is arranged and the burned flue gas is collected and then recycled, the flue gas burning system 700 provided by the embodiment increases the heat exchange times of the flue gas, directly utilizes the waste heat of the flue gas, is high in comprehensive utilization rate, does not need to add an additional waste heat recycling device, and has the advantages of few equipment parts, small whole size of the flue gas burning system 700, simplicity in operation, high economic value and use value.

In some embodiments, as shown in fig. 2 and 4, the incinerator 10 is provided with a combustion-supporting gas inlet 111, the combustion-supporting gas inlet 111 is connected to a combustion-supporting gas outlet 212, and the combustion-supporting gas enters the combustion chamber 11 through the combustion-supporting gas inlet 111 after coming out of the combustion-supporting gas outlet 212 to assist the flue gas to be sufficiently combusted in the combustion chamber 11. Of course, the combustion-supporting gas can also be simultaneously conveyed to other process zones (such as the aluminum scrap melting vortex chamber 600) of the aluminum scrap pretreatment system through pipelines (such as a tee joint).

In some embodiments, the clean gas vent 213 is connected to a chimney or the like exhaust. After heat exchange, the temperature of the incinerated flue gas is reduced to 100-150 ℃, and the incinerated flue gas can be directly discharged into the atmosphere.

In some embodiments, as shown in fig. 6, the combustion chamber 11 is cylindrical, the first heat exchange chamber 12 is annular, the first heat exchange chamber 12 is disposed around at least a portion of the periphery of the combustion chamber 11, the flue gas inlet 121 is disposed at the bottom of the first heat exchange chamber 12, and the top of the first heat exchange chamber 12 is communicated with the top of the combustion chamber 11; a preheating pipeline is arranged in the first heat exchange chamber 12, one end of the preheating pipeline is communicated with the flue gas inlet 121, and the other end of the preheating pipeline extends into the combustion chamber 11.

In the incinerator 10 provided by this embodiment, on one hand, by setting the shape of the first heat exchange chamber 12, the first heat exchange chamber 12 surrounds the periphery of the combustion chamber 11, and the contact area between the first heat exchange chamber 12 and the combustion chamber 11 can be increased to increase the heat exchange area, so that the flue gas to be incinerated has a better heat exchange effect; on the other hand, the flue gas is fed from the bottom of the first heat exchange chamber 12, and the top of the first heat exchange chamber is communicated with the combustion chamber 11, so that the retention time of the flue gas to be incinerated in the first heat exchange chamber 12 can be increased, the flue gas to be incinerated has sufficient time, and the temperature can be raised to a certain value, and the heat exchange effect is further improved.

In some embodiments, as shown in fig. 6, a communication pipe is provided between the incinerator 10 and the communication chamber 30, the first heat exchange chamber 12 is enclosed on the outer periphery of the communication pipe, and since the pipe diameter of the communication pipe is smaller than the diameter size of the combustion chamber 11, the first heat exchange chamber 12 is enclosed on the outer periphery of the communication pipe, the overall volume of the incinerator 10 can be reduced, and the cost can be reduced.

In some embodiments, the preheat line comprises a preheat tube; wherein the pre-heating tube comprises an S-shaped tube or the pre-heating tube comprises a helical tube.

Through setting up preheating conduit to S shape or spiral, can increase the dwell time of waiting to burn the flue gas in first heat exchange chamber 12, thereby make and wait to burn the flue gas and have abundant time and carry out the heat transfer, and then make and wait to burn the flue gas and have higher temperature before getting into combustion chamber 11, both can correspondingly reduce the required fuel supply of combustion chamber 11, also can shorten the time that the flue gas heaies up in combustion chamber 11, thereby there is longer time to burn, so that the burning of flue gas is more abundant, get rid of more pollutants, improve the clean rate of exhaust gas after burning.

In some embodiments, as shown in fig. 6, a plurality of annular partition plates 122 are disposed in the first heat exchange chamber 12 at intervals along the axial direction of the first heat exchange chamber 12, and two adjacent annular partition plates 122 are disposed in a staggered manner, so that the inside of the first heat exchange chamber 12 forms a curved preheating passage.

The curved direction in fig. 6 is the flow direction of the flue gas to be incinerated, wherein the first heat exchange chamber 12 is an annular structure and comprises an inner wall surface and an outer wall surface. Wherein, a part of the annular partition plates 122 are connected with the inner wall surface and provided with a gap between the annular partition plates and the outer wall surface, and the other part of the annular partition plates 122 are connected with the outer wall surface and provided with a gap between the annular partition plates and the inner wall surface, so that two adjacent gaps are arranged in a staggered manner, the flowing direction of the flue gas to be incinerated is curved, and the staying time of the flue gas to be incinerated in the first heat exchange chamber 12 is increased. The annular partition plate 122 is simple in structure and convenient to set, can be used for a long time, and contributes to reducing cost.

In some embodiments, as shown in fig. 7, a plurality of sets of heat exchange fins 23 are disposed in the air heat exchange furnace 20, and the plurality of sets of heat exchange fins 23 are disposed in the second heat exchange chamber 21; the heat exchange fins 23 are provided with heat exchange tubes 24 in a penetrating manner, one end of each heat exchange tube 24 is communicated with a combustion-supporting gas inlet 211, and the other end of each heat exchange tube 24 is communicated with a combustion-supporting gas outlet 212.

Through setting up air recuperative furnace 20, can make the flue gas after burning preheat combustion-supporting gas, through setting up heat exchanger fin 23, can increase substantially the heat transfer area between the flue gas after burning and the combustion-supporting gas, improve combustion-supporting gas's temperature, reduce combustion-supporting gas and carry out the required fuel that heaies up after getting into combustion chamber 11 to reduce the cost of burning.

In some embodiments, as shown in fig. 3 and 4, an intake fan 13 is connected to the intake port.

Can make the flue gas more unobstructed from the circulation of drying cylinder 400 to burning in burning furnace 10 through setting up air intake fan 13, will wait to burn the continuous suction of flue gas and burn in burning furnace 10, make to be full of in the combustion chamber 11 as far as possible and wait to burn flue gas and combustion-supporting gas to improve the availability factor who burns burning furnace 10, also corresponding availability factor who improves fuel.

In some embodiments, as shown in fig. 2 and 4, the combustion supporting gas inlet 211 is connected to a blower 22.

The blower 22 is arranged to make the combustion-supporting gas enter the air heat-exchange furnace 20 for heat exchange. The flow of the combustion-supporting gas can be controlled by reasonably setting the power of the air blower 22, so that the flow of the flue gas to be incinerated and the flow of the combustion-supporting gas are in a reasonable proportioning range, that is, too much combustion-supporting gas entering the combustion chamber 11 can be avoided, the incineration amount of the flue gas is reduced, the consumption of fuel is increased, too little combustion-supporting gas entering the combustion chamber 11 can be avoided, and the flue gas entering the combustion chamber 11 can not be sufficiently combusted.

In some embodiments, as shown in fig. 3 and 5, the incinerator 10 is provided with a temperature detection device 16 and a pressure detection device 15.

The probe of the temperature detection device 16 and the probe of the pressure detection device 15 may be disposed in the first heat exchange chamber 12, so as to detect the pressure and the temperature in the first heat exchange chamber 12 in real time, and adjust the flow rate of the flue gas according to the pressure and the temperature in the first heat exchange chamber 12.

Further, the probe of the temperature detection device 16 and the probe of the pressure detection device 15 may be provided in the combustion chamber 11, so that the pressure and the temperature in the combustion chamber 11 can be detected in real time, and the fuel supply amount can be adjusted according to the pressure and the temperature in the combustion chamber 11.

The temperature detection device 16 and the pressure detection device 15 can detect the heat exchange and incineration conditions of the flue gas in the incinerator 10 on one hand, and adjust according to the actual conditions so as to ensure that the flue gas is fully combusted and reduce the supply amount of fuel as much as possible; on the other hand, the working state of the incinerator 10 can be detected, so that the possibility that the use safety is influenced due to overhigh pressure in the incinerator 10 is reduced, or the possibility that the smoke cannot be completely combusted due to overlow temperature in the incinerator 10 to generate toxic and harmful gas is reduced.

In some embodiments, as shown in fig. 3 and 4, the flue gas incineration system 700 further comprises a communication chamber 30 connected to the combustion chamber 11 and the second heat exchange chamber 21 and located below the combustion chamber 11 and the second heat exchange chamber 21; an access opening 31 is arranged on the communicating chamber 30.

The smoke generates ash substances and the like after being burnt. By providing the communicating chamber 30, it can be used to collect ash material and clean it through the access opening 31 to avoid secondary pollution. In addition, the cylindrical incinerator 10 and the cylindrical air heat exchange furnace 20 can be vertically arranged by arranging the communicating chamber 30, and the distance between the two furnaces is reduced, so that the occupied area of the flue gas incineration system 700 is reduced, and the flue gas incineration system 700 is more convenient to arrange.

Some embodiments of the present application provide an aluminum scrap pretreatment system, including: a drying drum 400 and a flue gas incineration system 700 as in any of the embodiments described above.

As shown in fig. 8 and 9, a smoke collecting hood 410 is provided on the drying drum 400; the flue gas inlet 121 of the flue gas incineration system 700 is connected with the fume collecting hood 410.

In some embodiments, the aluminum scrap pre-treatment system includes a storage hopper 100, a crusher 200, a drying drum 400, a magnetic separator 500, an aluminum scrap melting vortex chamber 600, and a flue gas incineration system 700. The storage hopper 100 is used for placing aluminum shavings and aluminum scraps generated in the machining process of the automobile hub; the crusher 200 is connected with the storage hopper 100 and is used for crushing the aluminum shavings and the aluminum scraps so as to facilitate conveying and melting; the drying cylinder 400 is connected with the crusher 200, and crushed aluminum shavings and aluminum scraps are conveyed into the drying cylinder 400 through a conveyer such as a packing auger and the like to be dried to remove moisture; the magnetic separator 500 is connected with the drying cylinder 400 and is used for removing harmful impurities such as iron and the like contained in the aluminum shavings and the aluminum scraps so as to improve the purity of the chemical components of the molten aluminum; the aluminum scrap melting vortex chamber 600 is connected with the magnetic separator 500, and the aluminum shavings and the aluminum scraps after magnetic separation are sent into the aluminum scrap melting vortex chamber 600 for melting by a conveyer such as a packing auger. The flue gas burning system 700 is connected with the fume collecting hood 410 in a sealing way and is used for burning the flue gas generated in the drying cylinder 400.

By arranging the flue gas incineration system 700, the flue gas is incinerated, so that more than 90% of harmful gas can be removed, and the concentration of VOCs (volatile organic compounds) in the exhaust gas can reach 30mg/Nm³Thereby reducing environmental pollution.

The aluminum scrap pretreatment system provided in this embodiment includes the flue gas incineration system 700 in any of the above embodiments, so that all the advantages of any of the above embodiments are achieved, and no further description is provided herein.

It is worth mentioning that the fume collecting hood 410 is used to collect the fume generated in the drying drum 400. The temperature in the drying cylinder 400 is usually between 280 ℃ and 400 ℃, the smoke collecting cover 410 wraps and seals the feed end of the drying cylinder 400 to collect high-temperature smoke, so that the high-temperature smoke can be preheated during drying aluminum scraps or used for carrying out secondary incineration and purification on waste smoke, the energy consumption required by drying the aluminum scraps is reduced, and/or the environmental pollution is reduced, and the effects of saving the cost and/or improving the environmental protection are achieved.

In some embodiments, as shown in fig. 8, the aluminum scrap pretreatment system further includes a centrifugal separation device 300, and the centrifugal separation device 300 is connected to the drying drum 400 and is used for performing solid-liquid separation on the aluminum scrap and the liquid attached to the aluminum scrap before the aluminum scrap enters the drying drum 400.

By providing the centrifugal separation device 300, the moisture, the cutting fluid, the lubricating oil and the like attached to the aluminum chips are separated by the centrifugal force, and solid-liquid separation is realized. The separated cutting fluid can be repeatedly used after being collected and treated, so that the loss of the cutting fluid in production is reduced, and the production cost is reduced. Meanwhile, the possibility or content of cutting fluid and other liquids entering the drying cylinder 400 is reduced, so that the content of organic volatile matters such as cutting fluid and lubricating oil contained in the flue gas is reduced, the content of VOCs in the discharged flue gas is reduced, the environmental pollution is reduced, and the environmental protection treatment cost is reduced.

The flue gas incineration system 700 and the aluminum scrap pretreatment system provided by the present application are described below with an embodiment.

At present, aluminum product enterprises such as aluminum alloy hubs and the like can generate a large amount of aluminum scraps every day, the aluminum scraps are generally required to be collected, crushed, dewatered, dried, deironing, aluminum scrap remelting and the like, a machining workshop generates a large amount of aluminum scraps every day, the aluminum scraps are required to be framed in time to be collected and recycled, the situation that a large amount of aluminum scraps are accumulated to occupy a site and fund is avoided, the aluminum scraps do not have too much time for storage, draining and other operations, so that the aluminum scraps contain more liquids such as cutting fluid during pretreatment, water needs to be removed as much as possible before drying, the natural gas consumption is reduced, along with the continuous improvement of environmental protection requirements, the biggest problem of an aluminum scrap pretreatment system is the problem of smoke emission, the original treatment system can generate more smoke during drying, the smoke contains volatile matters such as cutting fluid and lubricating oil, and the like, secondary incineration treatment is required at present to reduce the content of VOCs in, therefore, the consumption of natural gas is high, and the environmental protection treatment cost is high.

Therefore, the embodiment provides an aluminum scrap pretreatment system, which is used for recovering aluminum shavings and aluminum scraps after the aluminum shavings and the aluminum scraps generated in the machining process of the automobile hub are subjected to treatment such as conveying, crushing, spin-drying, magnetic separation and melting. Meanwhile, waste oil smoke generated by drying is incinerated, and clean gas is generated to be discharged after waste heat is recovered, so that the beneficial effects of energy conservation and emission reduction can be achieved. In addition, the main stations of the whole aluminum scrap pretreatment device are arranged on the platform, so that the maintenance is convenient.

The drying treatment capacity of the aluminum scrap pretreatment system for the automobile hub aluminum shavings is about 1500 kg/h. Wherein, the length of the 90 percent automobile hub aluminum shavings is between 10mm and 40mm, and the specific gravity is between 0.8T/m3 and 0.9T/m 3. The aluminum skimmings pretreatment system adopts natural gas combustion heating, and the temperature in the drying cylinder 400 can reach 280-400 ℃.

Aluminium bits pretreatment system is provided with the flue gas collecting box, and the flue gas collecting box wraps up the collecting fume hood 410 of a stoving section of thick bamboo 400 and the charge door of waiting to dry the aluminium bits all sealedly and passes through pipe seal with burning furnace 10 and be connected, effectively collects the flue gas of production, installs sealing device on the charge door of a stoving section of thick bamboo 400, does not let the flue gas spill over (the charge door is a little higher than the discharge gate of natural gas combustion heating end and stoving aluminium bits) from the charge door of a stoving section of thick bamboo 400 and spills over to the workshop. The aluminum scraps to be dried fall into V-shaped blade grooves of a sealing device through a conveying mechanism such as a packing auger, the sealing device comprises 4V-shaped blade grooves, and an impeller is cross-shaped when observed along the direction of a rotation axis. The impeller is slowly rotated by the motor, 9 circles are rotated in about 1 minute, aluminum scraps fall into the drying cylinder 400 after rotating from the V-shaped blade grooves, and the periphery of the impeller is in clearance fit with the inner cavity wall of the sealing device, so that smoke is not easy to overflow. The sealing device is provided with a resistance sensing device, and when the blade rotates and is blocked, the motor rotates reversely, so that aluminum scraps are prevented from blocking the blade of the air lock.

The aluminum scrap pretreatment system is provided with an incinerator 10, the dried waste gas is pumped into the incinerator 10 to be preheated and then incinerated, hot air generated by incineration is discharged into an air preheater to preheat combustion-supporting gas, so that hot gas generated by incineration preheats combustion-supporting gas and waste gas to be incinerated, the natural gas consumption is saved, the combustion effect is improved, and the waste gas treatment cost is reduced.

The aluminum scrap pretreatment system is provided with a centrifugal separation device 300, such as a spin dryer. The drier adopts a high-power motor to drive a drying pot to separate aluminum scraps from liquid, the liquid is discharged from a pipeline, the aluminum scraps are thrown into the pipeline from a discharge port at the upper part and fly into a cyclone cylinder at the upper part for speed reduction and settlement, and then the aluminum scraps fall into an auger and are conveyed to a drying cylinder 400.

In some embodiments, the flue gas is led out from the smoke collecting hood 410 of the drying cylinder 400 through the high temperature fan (intake fan 13), enters from the inlet (i.e. the flue gas inlet 121) of the incinerator 10, is primarily preheated through the preheating pipe part (equivalent to the first heat exchange chamber 12), so that the flue gas reaches 500-.

In summary, the flue gas incineration system and the aluminum scrap pretreatment system provided by the embodiment have at least the following beneficial effects: by burning the flue gas, the environmental pollution caused by direct emission of the flue gas is reduced; meanwhile, the flue gas to be incinerated and the combustion-supporting gas are preheated respectively, and the waste heat of the flue gas is directly utilized, so that twice heat exchange is realized, the heat loss of the high-temperature flue gas is reduced, the fuel required by a combustion chamber is reduced, and the effects of saving energy and saving cost are achieved.

In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a flue gas system of burning of aluminium bits pretreatment system which characterized in that includes:

the incinerator is internally provided with a combustion chamber and a first heat exchange chamber which are communicated;

a flue gas inlet is formed in the side wall of the incinerator and used for enabling flue gas generated by an aluminum scrap pretreatment system during aluminum scrap drying to enter the incinerator, and the flue gas inlet is communicated with the first heat exchange chamber and used for enabling the flue gas to enter the combustion chamber after being preheated by the first heat exchange chamber;

the air heat exchange furnace is internally provided with a second heat exchange chamber, and the second heat exchange chamber is communicated with the combustion chamber;

the side wall of the air heat exchange furnace is provided with a combustion-supporting gas inlet, a combustion-supporting gas outlet and a clean gas discharge port, the combustion-supporting gas inlet is used for enabling combustion-supporting gas to enter the second heat exchange chamber and preheating the combustion-supporting gas through burned flue gas, the preheated combustion-supporting gas is discharged through the combustion-supporting gas outlet, the incinerator is provided with a combustion-supporting gas inlet, the combustion-supporting gas inlet is connected with the combustion chamber and is connected with the combustion-supporting gas outlet, the preheated combustion-supporting gas is introduced into the combustion chamber, and the burned flue gas is discharged through the clean gas discharge port after heat exchange.

2. The flue gas incineration system of claim 1,

the combustion chamber is columnar, the first heat exchange chamber is annular, the first heat exchange chamber is arranged around at least part of the periphery of the combustion chamber, the flue gas inlet is arranged at the bottom of the first heat exchange chamber, and the top of the first heat exchange chamber is communicated with the top of the combustion chamber;

a preheating pipeline is arranged in the first heat exchange chamber, one end of the preheating pipeline is communicated with the flue gas inlet, and the other end of the preheating pipeline extends into the combustion chamber.

3. The flue gas incineration system of claim 2,

the preheating pipeline comprises a preheating pipe;

wherein the pre-heating tube comprises an S-shaped tube or the pre-heating tube comprises a helical tube.

4. The flue gas incineration system of claim 2,

the first heat exchange chamber is internally provided with a plurality of annular partition plates which are arranged at intervals along the axial direction of the first heat exchange chamber, and two adjacent annular partition plates are arranged in a staggered manner, so that a bent preheating channel is formed inside the first heat exchange chamber.

5. A flue gas incineration system according to any one of the claims 1 to 4,

a plurality of groups of heat exchange sheets are arranged in the air heat exchange furnace and are arranged in the second heat exchange chamber;

and the heat exchange plate is provided with a heat exchange tube in a penetrating way, one end of the heat exchange tube is communicated with the combustion-supporting gas inlet, and the other end of the heat exchange tube is communicated with the combustion-supporting gas outlet.

6. A flue gas incineration system according to any one of the claims 1 to 4,

the air inlet is connected with an air inlet fan; and/or

The combustion-supporting gas inlet is connected with an air blower.

7. A flue gas incineration system according to any one of the claims 1 to 4,

and the incinerator is provided with a temperature detection device and a pressure detection device.

8. A flue gas incineration system according to any one of the claims 1 to 4, further comprising:

the communication chamber is connected with the combustion chamber and the second heat exchange chamber and is positioned below the combustion chamber and the second heat exchange chamber; and an access hole is formed in the communicating cavity.

9. An aluminum scrap pretreatment system, comprising:

the drying cylinder is provided with a smoke collecting hood;

and a flue gas incineration system as claimed in any one of claims 1 to 8, a flue gas inlet of said flue gas incineration system being connected to said fume collecting hood.

10. The aluminum scrap pretreatment system according to claim 9, further comprising:

and the centrifugal separation device is connected with the drying cylinder and is used for performing solid-liquid separation on the aluminum scraps and liquid attached to the aluminum scraps before the aluminum scraps enter the drying cylinder.

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