CN209308753U - A kind of alumina technology roasting low-temperature flue gas co-generation unit - Google Patents
A kind of alumina technology roasting low-temperature flue gas co-generation unit Download PDFInfo
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- CN209308753U CN209308753U CN201822119824.7U CN201822119824U CN209308753U CN 209308753 U CN209308753 U CN 209308753U CN 201822119824 U CN201822119824 U CN 201822119824U CN 209308753 U CN209308753 U CN 209308753U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model proposes a kind of alumina technologies to roast low-temperature flue gas co-generation unit, including power generation sub-system and reheat subsystem, the power generation sub-system includes the first-class heat exchanger being connected to baking furnace fume general pipeline, the smoke inlet of the first-class heat exchanger is connected to the smoke outlet of baking furnace fume general pipeline, and the working medium in the power generation sub-system is low-boiling-point organic compound；The reheating subsystem includes the secondary heat exchanger connecting with the outlet flue of first-class heat exchanger, the hot side water inlet of the Intranet water water outlet connection Intermediate Heat Exchanger of the secondary heat exchanger, the Intranet water water inlet of the cold side water outlet connection secondary heat exchanger of the Intermediate Heat Exchanger, the water outlet of the cold side water inlet connection red mud wash water circulatory system of the Intermediate Heat Exchanger, the water inlet of the hot side water outlet connection red mud wash water circulatory system of the Intermediate Heat Exchanger.The utility model is designed reasonably, the waste heat that can make full use of the low-temperature flue gas in alumina roasting furnace increase the economic benefit of enterprise.
Description
Technical field
The utility model relates to industrial smoke utilization technology fields, and in particular to a kind of alumina technology roasting low temperature
Flue gas co-generation unit.
Background technique
Aluminium have many advantages, such as it is light-weight, be not easy burn into it is electrically conductive, to extend, be widely used in aerospace, traffic fortune
The fields such as defeated, construction equipment are the second largest metal materials for being only second to steel.Aluminium oxide calcining technique is extensive in metallurgical industry
Using in aluminium oxide calcining technique, the baking furnace fume of generation is about 150 DEG C, wherein water content about 49%, and dew-point temperature is about
80 DEG C, containing a large amount of steam gasification latent heat, although there is a large amount of energy consumptions and extensive waste heat to be distributed, due to
Temperature is relatively low, currently without being recycled well.How effectively fume afterheat to be recycled, can not only be
Enterprise carrys out band economic benefit, moreover it is possible to promote development of China's Aluminum metal working industry in terms of environmental protection and comprehensive utilization of resources.
Utility model content
The utility model aims to solve at least the technical problems existing in the prior art, especially innovatively proposes a kind of oxygen
Change aluminium technique and roast low-temperature flue gas co-generation unit, to be recycled to the low-temperature flue gas waste heat in aluminum oxide industry.
In order to realize the above-mentioned purpose of the utility model, the utility model provides a kind of alumina technology roasting low temperature cigarette
Gas co-generation unit, including power generation sub-system and reheating subsystem, the power generation sub-system includes total with baking furnace fume
The first-class heat exchanger of pipe connection, the smoke inlet of the first-class heat exchanger are connected to the smoke outlet of baking furnace fume general pipeline, and described one
Grade heat exchanger for the Intranet water of the baking furnace fume general pipeline flue gas being discharged and first-class heat exchanger to exchange heat, change by the level-one
The heat source water inlet of the high temperature feed water inlet connection evaporator of hot device, the heat source of the heat source water outlet connection preheater of the evaporator
Water inlet, the low-temperature return water mouth of the heat source water outlet connection first-class heat exchanger of the preheater, the working medium import of the preheater
It is connected to the sender property outlet of working medium pump, the sender property outlet of the preheater is connected with the working medium import of evaporator, the evaporator
Sender property outlet is communicated to the working medium import of generating set, the sender property outlet of the generating set be connected to the working medium of condenser into
Mouthful, the sender property outlet of the condenser is connected to the working medium import of working medium pump；
The reheating subsystem includes the secondary heat exchanger connecting with the outlet flue of first-class heat exchanger, the secondary heat exchange
Device is for exchanging heat the Intranet water of flue gas and secondary heat exchanger that first-class heat exchanger is discharged, the Intranet of the secondary heat exchanger
Water water outlet connects the hot side water inlet of Intermediate Heat Exchanger, the cold side water outlet connection secondary heat exchanger of the Intermediate Heat Exchanger
Intranet water water inlet, the water outlet of the cold side water inlet connection red mud wash water circulatory system of the Intermediate Heat Exchanger, the centre
The water inlet of the hot side water outlet connection red mud wash water circulatory system of heat exchanger, the Intermediate Heat Exchanger are used for secondary heat exchanger
Intranet water and red mud wash water exchange heat.
First-class heat exchanger is used to recycle the sensible heat of flue gas in baking furnace fume general pipeline, generates hot water, drives and sends out as heat source
Electric unit generation.Working medium pump is used to provide the pressure of flowing for working medium, and working medium is under the pressure-driven of working medium pump, successively by pre-
Hot device and evaporator form gaseous working medium by hot water heating, into generating set and the acting power generation of pushing generator group, through generating electricity
Condenser is gone successively to after unit discharge, liquid refrigerant is condensed into through condenser, returns to working medium pump and continue cycling through, is completed pair with this
The power generation of obvious heat of smoke acts on.
Secondary heat exchanger is used to recycle the latent heat for the flue gas being discharged from first-class heat exchanger, generates hot water.Intermediate Heat Exchanger
For giving the heat transfer of Intranet water in secondary heat exchanger to red mud wash water, the red mud wash water after heating is used for subsequent technique,
It completes to continue to heat red mud wash water using Latent heat with this.
In above scheme: the Intranet water of the first-class heat exchanger and secondary heat exchanger is alkaline water.Alkaline water is compared to pure
Water purification will not be generated due to the phenomenon that causing acid etching to equipment after the acid ingredient in receipts absorption flue gas, extended equipment and used week
Phase.
In above scheme: the Intermediate Heat Exchanger is plate heat exchanger.The heat transfer coefficient of plate heat exchanger is high, passes to red
Damage can be less during mud wash water, as far as possible reduction energy loss, improves recovery utilization rate.
In above scheme: the generating set is turbine power generation unit.Compared with screw expander, maximum swelling is compared
Greatly, heat source and working medium power generation be can make full use of, generated energy is improved.
In above scheme: the working medium in the power generation sub-system is low-boiling-point organic compound.Its boiling point satisfaction can be by level-one
The energy heats of net water become gaseous working medium.That is, its boiling point is lower than the temperature of level-one Intranet water.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are: can make full use of oxygen
The waste heat for changing the low-temperature flue gas in aluminium roaster is recycled twice, increases the economic benefit of enterprise, protects environment；Design
Rationally, to the recovery section of flue gas by the way of directly exchanging heat, the steam gasification that can utmostly absorb in flue gas is latent
Heat can be avoided in red mud wash water partially to the heating part of red mud wash water by the way of indirect heat exchange by Intermediate Heat Exchanger
Aluminic acid is contacted with acidic materials, avoids fouling while sufficiently recycling heat.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and should not be understood as to the utility model
Limitation.
A kind of alumina technology as shown in Figure 1 roasts low-temperature flue gas co-generation unit, including power generation sub-system and again
Heating subsystem, power generation sub-system include the first-class heat exchanger 2 being connected to baking furnace fume general pipeline 1, first-class heat exchanger 2 into cigarette
Mouthful be connected to the smoke outlet of baking furnace fume general pipeline 1, flue gas of the first-class heat exchanger 2 for baking furnace fume general pipeline 1 to be discharged and
The Intranet water of first-class heat exchanger 2 exchanges heat, and the heat source water inlet of the high temperature feed water inlet connection evaporator 4 of first-class heat exchanger 2 steams
The heat source water inlet of the heat source water outlet connection preheater 8 of device 4 is sent out, the heat source water outlet connection first-class heat exchanger 2 of preheater 8
Low-temperature return water mouth, the sender property outlet of the working medium inlet communication working medium pump 7 of preheater 8, the sender property outlet and evaporator 4 of preheater 8
Working medium import be connected, the sender property outlet of evaporator 4 is communicated to the working medium import of generating set 5, the sender property outlet of generating set 5
It is connected to the working medium import of condenser 6, the sender property outlet of condenser 6 is connected to the working medium import of working medium pump 7, in power generation sub-system
Working medium be low-boiling-point organic compound；
Reheating subsystem includes the secondary heat exchanger 3 connecting with the outlet flue of first-class heat exchanger 2, in secondary heat exchanger 3
Equipped with Intranet water, the Intranet water water outlet of secondary heat exchanger 3 connects the hot side water inlet of Intermediate Heat Exchanger 9, and Intermediate Heat Exchanger 9 is
Water-water heat exchanger, the Intranet water water inlet of the cold side water outlet connection secondary heat exchanger 3 of Intermediate Heat Exchanger 9, Intermediate Heat Exchanger 9
Cold side water inlet connection the red mud wash water circulatory system water outlet, Intermediate Heat Exchanger 9 hot side water outlet connection red mud whom is washed
The water inlet of the circulatory system, Intermediate Heat Exchanger 9 is for exchanging heat flue gas and red mud wash water that secondary heat exchanger 3 is discharged.
For extension life of equipment, the Intranet water of first-class heat exchanger 2 and secondary heat exchanger 3 is alkaline water, alkaline water
It will not generate compared to pure water due to the phenomenon that causing acid etching to equipment after the acid ingredient in absorption flue gas.
To improve recovery utilization rate, Intermediate Heat Exchanger 9 uses plate heat exchanger, and the heat transfer coefficient of plate heat exchanger is high, passes
Damage can be less during passing red mud wash water, as far as possible reduction energy loss.
To improve generated energy, generating set 5 is turbine power generation unit, can make full use of heat source and working medium power generation, and imitate
Rate can reach 80% or more, steady in a long-term efficient.
About 150 DEG C of flue gases for being fired the discharge of kiln gas general pipeline 1 enter first-class heat exchanger 2 and recycle sensible heat, and heating level-one is changed
For the Intranet water of hot device 2 to 80 DEG C~120 DEG C, working medium pump 7 drives working medium to sequentially enter preheater 8 and evaporator 4, and working medium enters pre-
It is preheated in preheater 8 by the Intranet water of first-class heat exchanger 2 after hot device 8, then by first-class heat exchanger 1 in evaporator 4
Intranet water heats and is formed steam, into generating set 5 and the acting power generation of pushing generator group 5.It is discharged through generating set 5 laggard
Enter the condensation of condenser 6 and form liquid refrigerant, return to working medium pump 7 and continue cycling through, power generation is completed using obvious heat of smoke with this and is acted on.
Flue gas through first-class heat exchanger 2 heat absorption after temperature be reduced to 100 DEG C or so, enter back into secondary heat exchanger 3 carry out it is secondary
It utilizes.Secondary heat exchanger 3 absorbs the latent heat in flue gas, to heat the Intranet water in secondary heat exchanger 3, and flue-gas temperature is reduced
It is then exhausted to 75 DEG C or so.It will be changed between the Intranet water in secondary heat exchanger 3 and red mud wash water by Intermediate Heat Exchanger 9
Heat, the red mud wash water after heating are used for subsequent technique, with this heating using Latent heat completion to red mud wash water.
The economic benefit of generation is for producing 2000000 tons of alumina technology production lines per year, generating set installed capacity
1800kW, 13,000,000 kWh of annual electricity generating capacity, heat 1500t/h red mud wash water or the total decomposition mother solution of 3000t/h to 70 DEG C, year heat supply
It measures 1,800,000 GJ, realizes 6.5 ten thousand tons of year feast-brand mark coal, 16.2 ten thousand tons of carbon dioxide discharge-reduction.
While there has been shown and described that the embodiments of the present invention, it will be understood by those skilled in the art that:
These embodiments can be carried out with a variety of variations, modification, replacement in the case where not departing from the principles of the present invention and objective
And modification, the scope of the utility model are defined by the claims and their equivalents.
Claims (5)
1. a kind of alumina technology roasts low-temperature flue gas co-generation unit, it is characterised in that: add including power generation sub-system and again
Thermal sub-system, the power generation sub-system include the first-class heat exchanger (2) being connected to baking furnace fume general pipeline (1), and the level-one is changed
The smoke inlet of hot device (2) is connected to the smoke outlet of baking furnace fume general pipeline (1), and the first-class heat exchanger (2) is used for roaster
The flue gas of flue gas general pipeline (1) discharge and the Intranet water of first-class heat exchanger (2) exchange heat, the high temperature of the first-class heat exchanger (2)
Feed water inlet is connected to the heat source water inlet of evaporator (4), the heat source of heat source water outlet connection preheater (8) of the evaporator (4)
Water inlet, the low-temperature return water mouth of heat source water outlet connection first-class heat exchanger (2) of the preheater (8), the preheater (8)
The sender property outlet of working medium inlet communication working medium pump (7), the sender property outlet of the preheater (8) and the working medium import of evaporator (4)
It is connected, the sender property outlet of the evaporator (4) is communicated to the working medium import of generating set (5), the working medium of the generating set (5)
Outlet is connected to the working medium import of condenser (6), the sender property outlet of the condenser (6) be connected to the working medium of working medium pump (7) into
Mouthful；
The reheating subsystem includes the secondary heat exchanger (3) connecting with the outlet flue of first-class heat exchanger (2), and the second level is changed
Hot device (3) is for exchanging heat the Intranet water of flue gas and secondary heat exchanger (3) that first-class heat exchanger (2) are discharged, the second level
The hot side water inlet of Intranet water water outlet connection Intermediate Heat Exchanger (9) of heat exchanger (3), the cold side of the Intermediate Heat Exchanger (9)
Water outlet connects the Intranet water water inlet of secondary heat exchanger (3), and the cold side water inlet connection red mud of the Intermediate Heat Exchanger (9) is washed
The water outlet of water circulation system, the water inlet of the hot side water outlet connection red mud wash water circulatory system of the Intermediate Heat Exchanger (9),
The Intermediate Heat Exchanger (9) is for exchanging heat the Intranet water of secondary heat exchanger (3) and red mud wash water.
2. a kind of alumina technology according to claim 1 roasts low-temperature flue gas co-generation unit, it is characterised in that: institute
The Intranet water for stating first-class heat exchanger (2) and secondary heat exchanger (3) is alkaline water.
3. a kind of alumina technology according to claim 2 roasts low-temperature flue gas co-generation unit, it is characterised in that: institute
Stating Intermediate Heat Exchanger (9) is plate heat exchanger.
4. a kind of alumina technology according to claim 1 roasts low-temperature flue gas co-generation unit, it is characterised in that: institute
Stating generating set (5) is turbine power generation unit.
5. a kind of alumina technology according to claim 1 roasts low-temperature flue gas co-generation unit, it is characterised in that: institute
Stating the working medium in power generation sub-system is low-boiling-point organic compound.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822119824.7U CN209308753U (en) | 2018-12-18 | 2018-12-18 | A kind of alumina technology roasting low-temperature flue gas co-generation unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822119824.7U CN209308753U (en) | 2018-12-18 | 2018-12-18 | A kind of alumina technology roasting low-temperature flue gas co-generation unit |
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| CN209308753U true CN209308753U (en) | 2019-08-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114459252A (en) * | 2021-12-29 | 2022-05-10 | 茌平信发华宇氧化铝有限公司 | Comprehensive utilization process for flue gas waste heat of roasting furnace and flue gas treatment device |
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2018
- 2018-12-18 CN CN201822119824.7U patent/CN209308753U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114459252A (en) * | 2021-12-29 | 2022-05-10 | 茌平信发华宇氧化铝有限公司 | Comprehensive utilization process for flue gas waste heat of roasting furnace and flue gas treatment device |
| CN114459252B (en) * | 2021-12-29 | 2023-10-27 | 茌平信发华宇氧化铝有限公司 | Comprehensive utilization process of flue gas waste heat of roasting furnace and flue gas treatment device |
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