CN212925191U - Aluminum cell waste heat recovery pipeline configuration structure - Google Patents
Aluminum cell waste heat recovery pipeline configuration structure Download PDFInfo
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- CN212925191U CN212925191U CN202021694562.8U CN202021694562U CN212925191U CN 212925191 U CN212925191 U CN 212925191U CN 202021694562 U CN202021694562 U CN 202021694562U CN 212925191 U CN212925191 U CN 212925191U
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Abstract
The utility model belongs to the technical field of aluminum cell waste heat recovery. A configuration structure of a waste heat recovery pipeline of an aluminum electrolysis cell is arranged in the circumferential direction of the aluminum electrolysis cell, is connected with a corresponding cell wall heat exchanger and comprises a first conveying main pipe, a first conveying branch pipe, a second conveying main pipe and a second conveying branch pipe, wherein the first conveying main pipe is wrapped in the circumferential direction of the aluminum electrolysis cell; the first conveying branch pipes are arranged between the first conveying main pipe and the liquid inlets of the groove wall heat exchangers; the second conveying main pipe is arranged around the circumference of the aluminum electrolytic cell in a wrapping manner; second conveying branch pipes are arranged between the second conveying main pipe and the liquid outlets of the groove wall heat exchangers; and the heat exchange medium is guided into the groove wall heat exchanger by the first conveying main pipe, and is guided out by the second conveying main pipe after heat exchange. The aluminum electrolytic cell has the advantages of reasonable structural design and configuration, and can make full use of the heat exchange area of the outer wall of the aluminum electrolytic cell and improve the heat exchange efficiency.
Description
Technical Field
The utility model belongs to the technical field of aluminium cell waste heat recovery, concretely relates to aluminium cell waste heat recovery pipeline configuration structure.
Background
In the aluminum electrolysis industry, by 2019, the total production capacity of raw aluminum is 4100 ten thousand tons, the power consumption of aluminum is 13000-14000 kwh, the power consumption cost accounts for about 40% of the total cost, the energy utilization rate of an electrolytic cell is less than 50%, and the rest is dissipated into the atmosphere in the form of heat energy. Along with the stricter national requirements on energy conservation and emission reduction of electrolytic aluminum enterprises, the electrolytic aluminum enterprises gradually recycle the energy of the electrolytic cell. The temperature of the side wall of the electrolytic cell reaches 280-350 ℃, the temperature of a heat source is high, the temperature of the recycled hot water can reach more than 200 ℃, and the recycling value is huge. But due to the particularity of the production environment around the aluminium electrolysis cell: firstly, the side wall space is narrow, taking a 400kA aluminum electrolytic cell as an example, the electrolytic cell shell with the length of about 19m is placed in the middle of 29 groups of U-shaped cradle frames which are arranged at intervals. 56 cavities are formed by the 29 groups of U-shaped cradle frames, the side walls of the cell shells on two sides, the cell edge plates on the top of the cradle frames and the cathode steel bars exposed from the lower part of the electrolytic cell. The length of both ends is about 5 meters, and because bear the weight of electrolysis trough superstructure, the steel construction design cavity is very little, and waste heat recovery does not possess the economic nature. Secondly, the high magnetic field, high dust and high acid gas atmosphere influence the design and installation of equipment, and the limitation is large, so that the energy utilization of the side wall of the electrolytic cell is difficult.
At present, more than 80 electrolytic aluminum enterprises exist in China, 100 electrolytic series production lines exist, 200-360 electrolytic baths in one electrolytic series are large in number. However, the current domestic electrolytic aluminum industry has no effective utilization scheme for such a large heat source.
Traditional waste heat recovery scheme, on unable direct application in aluminium cell, on the one hand can't match with the outer wall of aluminium cell, can't improve heat transfer area, be unfavorable for the waste heat recovery to aluminium cell, on the other hand pipeline design is unreasonable, leads to pipeline pressure drop loss inequality, and the medium flows inhomogeneously for heat exchange efficiency is not high.
Disclosure of Invention
The utility model aims at the problem that the aforesaid exists and not enough, provide an aluminium cell waste heat recovery pipeline configuration structure, its structural design is reasonable, and the configuration is reasonable, can make full use of aluminium cell outer wall's heat transfer area, improves heat exchange efficiency.
In order to realize the purpose, the adopted technical scheme is as follows:
the utility model provides an aluminium cell waste heat recovery pipeline configuration structure, its cloth is located the circumference of aluminium cell to be connected with corresponding cell wall heat exchanger, include:
a first conveying main pipe which is wound around the circumference of the aluminum electrolysis cell;
the first conveying branch pipes are arranged between the first conveying main pipe and the liquid inlets of the groove wall heat exchangers;
the second conveying main pipe is arranged in the circumferential direction of the aluminum electrolytic cell in a wrapping mode; and
the second conveying branch pipes are arranged between the second conveying main pipe and the liquid outlets of the groove wall heat exchangers;
and the heat exchange medium is guided into the groove wall heat exchanger by the first conveying main pipe, and is guided out by the second conveying main pipe after heat exchange.
According to the utility model discloses aluminum cell waste heat recovery pipeline configuration structure, preferably, first conveying main pipe and second conveying main pipe are single line structure, the first end of first conveying main pipe is the medium inlet, the second end of first conveying main pipe is sealed; the first end of the second conveying main pipe is a medium outlet, and the second end of the second conveying main pipe is sealed.
According to the utility model discloses aluminum cell waste heat recovery pipeline configuration structure, preferably, along the flow direction of first transport main pipe, each the both ends of first transport branch pipe are A in proper order1And a1、A2And a2、……AnAnd anTwo ends of each second conveying branch pipe are sequentially B1And b1、B2And b2、……BnAnd bn；
The lengths of the first conveying main pipe, the first conveying branch pipe, the second conveying main pipe and the second conveying branch pipe accord with the following relations: a. the1a1+ B1b1+ B1Bn = A1An+ Anan+ Bnbn。
According to the utility model of the aluminum cell waste heat recovery pipeline configuration structure, preferably, the first conveying main pipe and the second conveying main pipe are of a parallel structure, the middle part of the first conveying main pipe is provided with a medium inlet pipe, and both ends of the first conveying main pipe are sealed; and a medium outlet pipe is arranged in the middle of the second conveying main pipe, and two ends of the second conveying main pipe are sealed.
According to the utility model discloses aluminum cell waste heat recovery pipeline configuration structure, preferably, first conveying main pipe and second conveying main pipe are the doubling structure, the middle part of first conveying main pipe is provided with the medium inlet pipe, the both ends of first conveying main pipe form closed loop intercommunication; and a medium outlet pipe is arranged in the middle of the second conveying main pipe, and two ends of the second conveying main pipe form closed-loop communication.
According to the utility model discloses aluminium cell waste heat recovery pipeline configuration structure, preferably, the cross sectional area of first conveying main pipe is half of medium inlet pipe, the cross sectional area of second conveying main pipe is half of medium outlet pipe, each the cross sectional area of first conveying branch pipe is the same, each the cross sectional area of second conveying branch pipe is the same.
According to the utility model discloses aluminum cell waste heat recovery pipeline configuration structure, preferably aluminum cell with one side, along the flow direction of first transport main pipe, each the both ends of first transport branch pipe are A in proper order1And a1、A2And a2、……AnAnd anTwo ends of each second conveying branch pipe are sequentially B1And b1、B2And b2、……BnAnd bn；
The first conveying main pipe,The lengths of the first conveying branch pipe, the second conveying main pipe and the second conveying branch pipe accord with the following relations: a. the1a1+ B1b1+ B1Bn = A1An+ Anan+ Bnbn。
According to the utility model discloses aluminium cell waste heat recovery pipeline configuration structure, preferably, a plurality of negative pole steel bar groups have been laid to the outside lower part of aluminium cell, cradle frame has been laid to negative pole steel bar group both sides, cell wall heat exchanger is laid in the cavity between aluminium cell wall, negative pole steel bar group and cradle frame.
By adopting the technical scheme, the beneficial effects are as follows:
this application overall structure reasonable in design, it can realize arranging a plurality of cell wall heat exchangers on the electrolysis trough lateral wall counterpoint to realize the intercommunication through main and branch pipe, make and equal with the total pipeline pressure drop loss of arbitrary electrolysis trough cell wall heat exchanger of one side, can ensure that heat transfer medium all has the same flow in arbitrary branch road.
The heat exchange power of any one of the heat exchangers on the same side of the aluminum electrolytic cell is the same under the same condition.
The sectional area of the pipeline around the aluminum electrolytic cell can be reduced by half relatively, the weight of the pipeline is greatly reduced, the investment cost is saved, the product competitiveness is improved, and the aluminum electrolytic cell waste heat recovery and utilization are more convenient.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly described below. The drawings are intended to depict only some embodiments of the invention, and not all embodiments of the invention are limited thereto.
Fig. 1 is one of the schematic structural diagrams of the arrangement structure of the waste heat recovery pipeline of the aluminum electrolysis cell according to the embodiment of the present invention.
Fig. 2 is a schematic sectional structure view of fig. 1.
Fig. 3 is a second schematic structural diagram of an arrangement structure of a waste heat recovery pipeline of an aluminum electrolysis cell according to an embodiment of the present invention.
Fig. 4 is a third schematic structural diagram of an arrangement structure of a waste heat recovery pipeline of an aluminum electrolysis cell according to an embodiment of the present invention.
Number in the figure:
100 is a first conveying main pipe;
200 is a first conveying branch pipe;
300 is a second conveying main pipe;
400 is a second conveying branch pipe;
500 is an aluminum electrolytic cell, 501 is a cell wall heat exchanger, 502 is a cathode steel bar group, 503 is a cradle frame;
a media inlet pipe 610 and a media outlet pipe 620.
Detailed Description
The embodiments of the present invention will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art.
In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for describing various elements of the present invention, and do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.
It should be noted that when an element is referred to as being "connected," "coupled," or "connected" to another element, it can be directly connected, coupled, or connected, but it is understood that intervening elements may be present therebetween; i.e., positional relationships encompassing both direct and indirect connections.
It should be noted that the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.
It should be noted that terms indicating orientation or positional relationship such as "upper", "lower", "left", "right", and the like, are used only for indicating relative positional relationship, which is for convenience of describing the present invention, and not that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation; when the absolute position of the object to be described is changed, the relative positional relationship may also be changed accordingly.
Referring to fig. 1-4, the application discloses a configuration structure of a waste heat recovery pipeline of an aluminum electrolysis cell, which is arranged in the circumferential direction of the aluminum electrolysis cell and connected with a corresponding cell wall heat exchanger, and specifically comprises a first conveying main pipe 100, a first conveying branch pipe 200, a second conveying main pipe 300 and a second conveying branch pipe 400, wherein the first conveying main pipe 100 is wrapped in the circumferential direction of the aluminum electrolysis cell 500; a first conveying branch pipe 200 is arranged between the first conveying main pipe 100 and the liquid inlet of each groove wall heat exchanger 501; the second conveying main pipe 300 is arranged around the circumference of the aluminum electrolytic cell 500; a second conveying branch pipe 400 is arranged between the second conveying main pipe 300 and the liquid outlet of each groove wall heat exchanger 501; the heat exchange medium is led into the tank wall heat exchanger 501 through the first conveying main pipe 100 and the first conveying branch pipe, and after heat exchange, the heat exchange medium is led out through the second conveying main pipe 300 and the second conveying branch pipe 400.
For the structure of the first conveying main pipe and the second conveying main pipe, the present embodiment gives a plurality of different structures:
the first embodiment is as follows: referring to fig. 1 and 2, in the present embodiment, the first conveying main pipe 100 and the second conveying main pipe 300 are both of a single-line structure, a first end of the first conveying main pipe 100 is a medium inlet, and a second end of the first conveying main pipe 100 is sealed; the first end of the second conveying main pipe 300 is a medium outlet, and the second end of the second conveying main pipe 300 is sealed, so that the unidirectional flow of the heat exchange medium in the first conveying main pipe and the second conveying main pipe can be realized; as shown in fig. 1, the first conveying main pipe 100 and the second conveying main pipe 300 are wrapped in a U shape.
In the single-line structure of the first conveying main pipe 100 and the second conveying main pipe 300 of the present embodiment, the two ends of each first conveying branch pipe 200 are sequentially a along the flowing direction of the first conveying main pipe 1001And a1、A2And a2、……AnAnd anTwo ends of each second conveying branch pipe are sequentially B1And b1、B2And b2、……BnAnd bn(ii) a The lengths of the first conveying main pipe, the first conveying branch pipe, the second conveying main pipe and the second conveying branch pipe conform to the following relations: a. the1a1+ B1b1+ B1Bn = A1An+ Anan+ Bnbn. Wherein A is1Is the connection point of the first branch conveying pipe and the first main conveying pipe, a1Is a connection point between the first conveying branch pipe and the corresponding groove wall heat exchanger; by analogy, AnIs the connection point of the nth first conveying branch pipe and the first conveying main pipe, anThe connection point of the nth first conveying branch pipe and the first conveying main pipe is provided; b is1Is the connection point of the first and second conveying branch pipes and the corresponding tank wall heat exchanger, b1Is a connecting point between the first second conveying branch pipe and the corresponding groove wall heat exchanger; by analogy, BnIs the connection point of the nth second conveying branch pipe and the second conveying main pipe, bnIs the connecting point of the nth second conveying branch pipe and the corresponding groove wall heat exchanger.
As shown in the figure, in this embodiment, the medium inlet of the first conveying main pipe and the medium outlet of the second conveying main pipe are respectively located at two sides of the aluminum electrolysis cell, the cross sections of the positions of the first conveying main pipe and the second conveying main pipe are the same, the cross sections of the first conveying branch pipes are the same, and the cross sections of the second conveying branch pipes are also the same. Therefore, the pressure drop loss of the pipelines can be equal, and the heat exchange medium can be ensured to have the same flow in any branch.
Example two: referring to fig. 3, in the embodiment, the first conveying main pipe 100 and the second conveying main pipe 300 are in a parallel structure, a medium inlet pipe 610 is arranged in the middle of the first conveying main pipe 100, and both ends of the first conveying main pipe 100 are sealed; the middle part of the second conveying trunk 300 is provided with a medium outlet pipe 620, and both ends of the second conveying trunk 300 are sealed.
Example three: referring to fig. 4, the first conveying main pipe 100 and the second conveying main pipe 300 in this embodiment are of a parallel structure, a medium inlet pipe 610 is arranged in the middle of the first conveying main pipe 100, and two ends of the first conveying main pipe 100 form closed-loop communication; the middle part of the second conveying trunk 300 is provided with a medium outlet pipe 620, and both ends of the second conveying trunk 300 form closed loop communication.
In the second and third embodiments, the cross-sectional area of the first conveying trunk may be half of that of the medium inlet pipe, the cross-sectional area of the second conveying trunk may be half of that of the medium outlet pipe, the cross-sectional areas of the first conveying branch pipes are the same, and the cross-sectional areas of the second conveying branch pipes are the same. Therefore, the weight of the pipeline can be reduced, and the investment cost is saved.
Further, in the second and third embodiments, the two ends of each first conveying branch pipe are sequentially a along the flowing direction of the first conveying main pipe 100 on the same side of the aluminum reduction cell 5001And a1、A2And a2、……AnAnd anTwo ends of each second conveying branch pipe are sequentially B1And b1、B2And b2、……BnAnd bn(ii) a The lengths of the first conveying main pipe, the first conveying branch pipe, the second conveying main pipe and the second conveying branch pipe conform to the following relations: a. the1a1+ B1b1+ B1Bn = A1An+ Anan+ Bnbn。
Further, in this embodiment, a plurality of cathode steel bar sets 502 are disposed at the lower portion of the outer side of the aluminum electrolysis cell 500, cradle frames 503 are disposed at two sides of the cathode steel bar sets, and the cell wall heat exchanger 501 is disposed in a cavity among the cell wall of the aluminum electrolysis cell 500, the cathode steel bar sets 502 and the cradle frames 503.
The term "and/or" herein means that three relationships may exist. For example, a and/or B may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.
While the above description has described in detail the preferred embodiments for carrying out the invention, it should be understood that these embodiments are presented by way of example only, and are not intended to limit the scope, applicability, or configuration of the invention in any way. The scope of the invention is defined by the appended claims and equivalents thereof. Many modifications may be made to the foregoing embodiments by those skilled in the art in light of the teachings of the present disclosure, and such modifications are intended to be within the scope of the present disclosure.
Claims (8)
1. The utility model provides an aluminium cell waste heat recovery pipeline configuration structure, its cloth is located the circumference of aluminium cell to be connected with corresponding cell wall heat exchanger, its characterized in that includes:
a first conveying main pipe which is wound around the circumference of the aluminum electrolysis cell;
the first conveying branch pipes are arranged between the first conveying main pipe and the liquid inlets of the groove wall heat exchangers;
the second conveying main pipe is arranged in the circumferential direction of the aluminum electrolytic cell in a wrapping mode; and
the second conveying branch pipes are arranged between the second conveying main pipe and the liquid outlets of the groove wall heat exchangers;
and the heat exchange medium is guided into the groove wall heat exchanger by the first conveying main pipe, and is guided out by the second conveying main pipe after heat exchange.
2. The aluminum reduction cell waste heat recovery pipeline configuration structure according to claim 1, wherein the first conveying main pipe and the second conveying main pipe are both of a single-line structure, a first end of the first conveying main pipe is a medium inlet, and a second end of the first conveying main pipe is sealed; the first end of the second conveying main pipe is a medium outlet, and the second end of the second conveying main pipe is sealed.
3. The aluminum reduction cell waste heat recovery pipeline arrangement structure as claimed in claim 2, wherein each of the first conveying main pipes is arranged along the flowing direction of the first conveying main pipeTwo ends of the conveying branch pipe are sequentially A1And a1、A2And a2、……AnAnd anTwo ends of each second conveying branch pipe are sequentially B1And b1、B2And b2、……BnAnd bn；
The lengths of the first conveying main pipe, the first conveying branch pipe, the second conveying main pipe and the second conveying branch pipe accord with the following relations: a. the1a1+ B1b1+ B1Bn = A1An+ Anan+ Bnbn。
4. The aluminum electrolysis cell waste heat recovery pipeline configuration structure according to claim 1, wherein the first conveying main pipe and the second conveying main pipe are of a parallel structure, a medium inlet pipe is arranged in the middle of the first conveying main pipe, and two ends of the first conveying main pipe are sealed; and a medium outlet pipe is arranged in the middle of the second conveying main pipe, and two ends of the second conveying main pipe are sealed.
5. The aluminum electrolysis cell waste heat recovery pipeline configuration structure according to claim 1, wherein the first conveying main pipe and the second conveying main pipe are of a parallel structure, a medium inlet pipe is arranged in the middle of the first conveying main pipe, and two ends of the first conveying main pipe form closed loop communication; and a medium outlet pipe is arranged in the middle of the second conveying main pipe, and two ends of the second conveying main pipe form closed-loop communication.
6. The aluminum reduction cell waste heat recovery pipeline configuration structure according to claim 4 or 5, wherein the cross-sectional area of the first conveying main pipe is half of that of the medium inlet pipe, the cross-sectional area of the second conveying main pipe is half of that of the medium outlet pipe, the cross-sectional areas of the first conveying branch pipes are the same, and the cross-sectional areas of the second conveying branch pipes are the same.
7. According toThe aluminum reduction cell waste heat recovery pipeline configuration structure of claim 4 or 5, wherein the two ends of each first conveying branch pipe are sequentially A along the flowing direction of the first conveying main pipe at the same side of the aluminum reduction cell1And a1、A2And a2、……AnAnd anTwo ends of each second conveying branch pipe are sequentially B1And b1、B2And b2、……BnAnd bn；
The lengths of the first conveying main pipe, the first conveying branch pipe, the second conveying main pipe and the second conveying branch pipe accord with the following relations: a. the1a1+ B1b1+ B1Bn = A1An+ Anan+ Bnbn。
8. The aluminum electrolysis cell waste heat recovery pipeline configuration structure as claimed in claim 1, wherein a plurality of cathode steel bar sets are arranged at the lower part of the outer side of the aluminum electrolysis cell, cradle racks are arranged at two sides of each cathode steel bar set, and the cell wall heat exchanger is arranged in a cavity among the cell wall of the aluminum electrolysis cell, the cathode steel bar sets and the cradle racks.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021694562.8U CN212925191U (en) | 2020-08-14 | 2020-08-14 | Aluminum cell waste heat recovery pipeline configuration structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021694562.8U CN212925191U (en) | 2020-08-14 | 2020-08-14 | Aluminum cell waste heat recovery pipeline configuration structure |
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| CN212925191U true CN212925191U (en) | 2021-04-09 |
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