CN204918003U - System for calcination aluminium hydroxide recycle -water steam - Google Patents
System for calcination aluminium hydroxide recycle -water steam Download PDFInfo
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- CN204918003U CN204918003U CN201520658818.2U CN201520658818U CN204918003U CN 204918003 U CN204918003 U CN 204918003U CN 201520658818 U CN201520658818 U CN 201520658818U CN 204918003 U CN204918003 U CN 204918003U
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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
- Y02P20/00—Technologies relating to chemical industry
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Abstract
The utility model belongs to the technical field of oxidation aluminium production, in particular to system for calcination aluminium hydroxide recycle -water steam, including water vapor -recovery unit, main stove, suspension separation heat exchanger and heat transfer device, water vapor -recovery unit's feed inlet and aluminium hydroxide feeder intercommunication, water vapor -recovery unit's discharge gate and the feed inlet of main stove intercommunication, the discharge gate of main stove and the feed inlet intercommunication of suspension separation heat exchanger, the powder export of suspension separation heat exchanger is the discharge gate, gas outlet and heat transfer device's air inlet intercommunication, heat transfer device's gas outlet and gas treating system intercommunication. The utility model discloses a system has retrieved the water of crystallization and the attached water of aluminium hydroxide calcination in -process, carries out cycle recycle, can reduce the electric energy and the thermal energy consumption of calcination process, promotes energy saving and emission reduction, has increased the economic benefits of enterprise.
Description
Technical field
The utility model belongs to technical field of alumina production, particularly a kind of system of roasting aluminium hydroxide recycle-water steam.
Background technology
According to statistics, within 2014, China's aluminum oxide output has reached 4,777 ten thousand tons, is sure to occupy the first in the world.With attached water 6% ~ 10%(mass ratio in aluminium hydroxide) calculate, often produce 1 ton of aluminum oxide, the water of 0.629 ~ 0.703t ton of will draining, only just emits the water up to 3,300 ten thousand tons for 2014.
Use traditional stoving oven, in roasting process, attached water in aluminium hydroxide and crystal water are converted into water vapor, together with the combustion product gases after heat exchange, directly enter air as waste gas, like this, not only increase the exhausted air quantity that roasting process produces, increase power consumption, but also cause the huge waste of water resources, directly results in the increase of alumina production cost.
Therefore, how cycling and reutilization is carried out to the crystal water reclaimed in roasting process aluminium hydroxide and attached water, reduce the electric energy of roasting process and the consumption of heat energy, energy-saving and emission-reduction, increasing the economic benefit of enterprise, is one of important topic of facing of each aluminum oxide scientific worker.
Summary of the invention
For overcoming the deficiency that prior art exists, the utility model provides a kind of system of roasting aluminium hydroxide recycle-water steam, object becomes water vapor recycle in addition by being prepared together with attached water by the most of crystal water in aluminium hydroxide, improve water utilization rate, reduce torrefaction waste gas discharge simultaneously, reduce power consumption, improve the economic benefit of enterprise.
Realize the roasting aluminium hydroxide recycle-water steam system of the utility model object, comprise water vapor recovery device, main stove, suspension separation heat exchanging device and heat-exchanger rig;
The opening for feed of described water vapor recovery device is communicated with aluminium hydroxide feeding device, the discharge port of water vapor recovery device is communicated with the opening for feed of main stove, the discharge port of main stove is communicated with the opening for feed of suspension separation heat exchanging device, the powder outlet of suspension separation heat exchanging device is discharge port, pneumatic outlet is communicated with the inlet mouth of heat-exchanger rig, the air outlet of heat-exchanger rig is communicated with gas treating system, and the vapour outlet of suspension separation heat exchanging device is communicated with the steam inlet of water vapor recovery device; Described suspension separation heat exchanging device and heat-exchanger rig are all also provided with water-in and inlet channel, and described water vapor recovery device is also provided with steam inlet and the first vapour outlet, and heat-exchanger rig top is provided with the second vapour outlet.
Wherein, described water vapor recovery device adopts current-carrying tube gas-solid heat exchange device, drum, condenser and condensate water pot to be linked together the device obtained, drum is provided with safety valve, described gas-solid heat exchange device is shell-and-plate(heat)exchanger or tube and shell heat exchanger, its shell side is aluminium hydroxide passage, and plate journey or tube side are vapour passage.
Described main furnace main body to be aspect ratio be 2.5 ~ 4.0 right cylinder, main furnace bottom is Rotary-table, and the cone angle of Rotary-table 60 ° ~ 65 ° of being, are provided with thermal source import below main stove.
Water wall is equipped with in described suspension separation heat exchanging device inside.
Described heat-exchanger rig adopts current-carrying tube liquid-solid interchanger, drum, condenser and condensate water pot to be linked together, drum is provided with safety valve, described liquid-solid interchanger is shell-and-plate(heat)exchanger or shell-and-tube, and its shell side is aluminum oxide passage, and plate journey or tube side are soft water passage.
The method adopting above-mentioned roasting aluminium hydroxide recycle-water steam system to reclaim water vapor, carry out according to following steps:
(1) by the aluminum hydroxide filter cake feeding water vapor recovery device containing mass percent 6% attached water, in the steam inlet of water vapor recovery device, pass into 600 DEG C simultaneously, the superheated vapour of 0.5MPa, aluminum hydroxide filter cake and superheated vapour carry out heat exchange and reach equilibrium temperature in water vapor recovery device, superheat steam temperature reduces to 330 DEG C, aluminium hydroxide removes n crystal water, wherein 2≤n≤3, n the crystal water removed becomes the superheated vapour of 330 DEG C together with attached water, aluminium hydroxide is 30 ~ 90s in the residence time of water vapor recovery device, often produce one ton of aluminum oxide, output 330 DEG C, the first steam 0.45t of 0.5MPa, the material removing n crystal water enters main stove through water vapor recovery device discharge port,
(2) material entering main stove is through the high-temperature roasting of 1000 DEG C ~ 1050 DEG C, continue remove remaining crystal water and complete crystal conversion, 4 ~ 40s is stopped in main stove, roasting alumina material and dusty gas enter suspension separation heat exchanging device through main furnace discharge mouth, suspension separation heat exchanging device is introduced soft water and is carried out heat exchange, and the high-temperature dusty gas of alumina material with 600 DEG C is separated, wherein alumina material enters cooling system and is cooled to less than 80 DEG C, obtain alumina product, high-temperature dusty gas enters heat-exchanger rig;
(3) while in, high-temperature dusty gas enters heat-exchanger rig, soft water introduced by heat-exchanger rig, high-temperature dusty gas and soft water carry out heat exchange and reach equilibrium temperature, soft water is made to become 158 DEG C, second steam of 0.6MPa, the dusty gas of 158 DEG C is sent into purification system and is purified rear emptying, the dust that dusty gas settles down also collected by heat-exchanger rig, is hot alumina product, sent in cooling system and cool.
Wherein, described superheated vapour intake is by often producing 1 ton of aluminum oxide, 2.60 tons of superheated vapours.
The first described steam sends into bauxite stripping operation after desuperheat pressurization, and the second described steam sends to evaporation, wash water heating process.
Compared with prior art, feature of the present utility model and beneficial effect are:
In the utility model, the crystal water of aluminium hydroxide and attached water are recovered in water vapour retrieving arrangement, and the reaction that period occurs is:
Wherein, often production 1 ton of aluminum oxide can reclaim two crystal water in aluminium hydroxide, and meter 0.352t first steam, all can reclaim the attached water in aluminium hydroxide, and meter 0.098t first steam, amounts to first steam of 0.45 ton 330 DEG C.
Meanwhile, be the high-temperature dusty gas heat exchange of 600 DEG C by temperature in soft water and interchanger, often produce 1 ton of aluminum oxide, second steam of 0.33 ton 158 DEG C can be produced.
Owing to having reclaimed water vapor in advance, because this reducing exhausted air quantity in roasting process, saving power consumption and the fuel consumption of roasting, often producing the waste gas 0.56Nm that 1 ton of aluminum oxide can reduce roasting process generation
3, amount to and save the electric energy of 5.3kWh and the heat energy of 123.5MJ.
In sum, the utility model has reclaimed crystal water in Aluminium hydroxide roasting process and attached water, carries out cycling and reutilization, can reduce electric energy and the heat energy consumption of roasting process, promotes energy-saving and emission-reduction, adds the economic benefit of enterprise.
Accompanying drawing explanation
Fig. 1 is the system architecture schematic diagram of roasting aluminium hydroxide recycle-water steam of the present utility model;
Wherein: 1: water vapor recovery device; 2: main stove; 3: suspension separation heat exchanging device; 4: heat-exchanger rig;
A: aluminum hydroxide filter cake; B: superheated vapour; C: the first steam: D: soft water; E: thermal source; F: the second steam; G: alumina product; H: dusty gas.
Embodiment
Below embodiment of the present utility model 1 is described in detail by reference to the accompanying drawings, but protection domain of the present utility model not limit by embodiment.
As shown in Figure 1, the system of the roasting aluminium hydroxide recycle-water steam of the present embodiment, comprises water vapor recovery device 1, main stove 2, suspension separation heat exchanging device 3 and heat-exchanger rig 4;
The opening for feed of described water vapor recovery device 1 is communicated with aluminium hydroxide feeding device, the discharge port of water vapor recovery device 1 is communicated with the opening for feed of main stove 2, the discharge port of main stove 2 is communicated with the opening for feed of suspension separation heat exchanging device 3, the powder outlet of suspension separation heat exchanging device 3 is discharge port, pneumatic outlet is communicated with the inlet mouth of heat-exchanger rig 4, the air outlet of heat-exchanger rig 4 is communicated with gas treating system, and the vapour outlet of suspension separation heat exchanging device 3 is communicated with the steam inlet of water vapor recovery device 1; Described suspension separation heat exchanging device 3 and heat-exchanger rig 4 are all also provided with water-in and inlet channel, and described water vapor recovery device 1 is also provided with steam inlet and the first vapour outlet, and heat-exchanger rig 4 top is provided with the second vapour outlet.
Wherein, described water vapor recovery device 1 adopts current-carrying tube gas-solid heat exchange device, drum, condenser and condensate water pot to be linked together the device obtained, drum is provided with safety valve, described gas-solid heat exchange device is shell-and-plate(heat)exchanger or tube and shell heat exchanger, its shell side is aluminium hydroxide passage, and plate journey or tube side are vapour passage.
Described main stove 2 main body to be aspect ratio be 2.5 ~ 4.0 cone, main furnace bottom is Rotary-table, and the cone angle of Rotary-table 60 ° ~ 65 ° of being, are provided with thermal source E import below main stove.
Water wall is equipped with in described suspension separation heat exchanging device 3 inside.
Described heat-exchanger rig 4 adopts current-carrying tube liquid-solid interchanger, drum, condenser and condensate water pot to be linked together, drum is provided with safety valve, described liquid-solid interchanger is shell-and-plate(heat)exchanger or shell-and-tube, and its shell side is aluminum oxide passage, and plate journey or tube side are soft water passage.
The method adopting above-mentioned roasting aluminium hydroxide recycle-water steam system to reclaim water vapor, carry out according to following steps:
(1) the aluminum hydroxide filter cake A containing mass percent 6% attached water is fed in water vapor recovery device 1, in the steam inlet of water vapor recovery device, pass into 600 DEG C simultaneously, the superheated vapour B of 0.5MPa, aluminum hydroxide filter cake A and superheated vapour B carries out heat exchange and reaches equilibrium temperature in water vapor recovery device 1, superheated vapour B temperature reduces to 330 DEG C, aluminium hydroxide removes n crystal water, wherein 2≤n≤3, n the crystal water removed becomes the superheated vapour of 330 DEG C together with attached water, aluminium hydroxide is 30 ~ 90s in the residence time of water vapor recovery device 1, often produce one ton of aluminum oxide, output 330 DEG C, the first steam C0.45t of 0.5MPa, the material removing n crystal water enters main stove 2 through water vapor recovery device 1 discharge port,
(2) material entering main stove 2 is through the high-temperature roasting of 1000 DEG C ~ 1050 DEG C, continue remove remaining crystal water and complete crystal conversion, 4 ~ 40s is stopped in main stove 2, roasting alumina material and dusty gas enter suspension separation heat exchanging device 3 through main stove 2 discharge port, suspension separation heat exchanging device 3 is introduced soft water D and is carried out heat exchange, and the high-temperature dusty gas of alumina material with 600 DEG C is separated, wherein alumina material enters cooling system and is cooled to less than 80 DEG C, obtain alumina product G, high-temperature dusty gas enters heat-exchanger rig 4;
(3) while in, high-temperature dusty gas enters heat-exchanger rig 4, soft water D introduced by heat-exchanger rig 4, high-temperature dusty gas and soft water D carry out heat exchange and reach equilibrium temperature, soft water is made to become 158 DEG C, the second steam F of 0.6MPa, the dusty gas H of 158 DEG C sends into purification system and purifies rear emptying, the dust that dusty gas settles down also collected by heat-exchanger rig 4, is hot alumina product, sent in cooling system and cool.
Wherein, described superheated vapour B intake is by often producing 1 ton of aluminum oxide, 2.60 tons of superheated vapours.
The first described steam C sends into bauxite stripping operation after desuperheat pressurization, and the second described steam F sends to evaporation, wash water heating process.
Claims (5)
1. a roasting aluminium hydroxide recycle-water steam system, is characterized in that comprising water vapor recovery device, main stove, suspension separation heat exchanging device and heat-exchanger rig;
The opening for feed of described water vapor recovery device is communicated with aluminium hydroxide feeding device, the discharge port of water vapor recovery device is communicated with the opening for feed of main stove, the discharge port of main stove is communicated with the opening for feed of suspension separation heat exchanging device, the powder outlet of suspension separation heat exchanging device is discharge port, pneumatic outlet is communicated with the inlet mouth of heat-exchanger rig, the air outlet of heat-exchanger rig is communicated with gas treating system, and the vapour outlet of suspension separation heat exchanging device is communicated with the steam inlet of water vapor recovery device; Described suspension separation heat exchanging device and heat-exchanger rig are all also provided with water-in and inlet channel, and described water vapor recovery device is also provided with steam inlet and the first vapour outlet, and heat-exchanger rig top is provided with the second vapour outlet.
2. a kind of roasting aluminium hydroxide recycle-water steam system according to claim 1, it is characterized in that described water vapor recovery device adopts current-carrying tube gas-solid heat exchange device, drum, condenser and condensate water pot to be linked together the device obtained, safety valve is provided with at drum, described gas-solid heat exchange device is shell-and-plate(heat)exchanger or tube and shell heat exchanger, its shell side is aluminium hydroxide passage, and plate journey or tube side are vapour passage.
3. a kind of roasting aluminium hydroxide recycle-water steam system according to claim 1, it is characterized in that described main furnace main body to be aspect ratio be the right cylinder of 2.5 ~ 4.0, main furnace bottom is Rotary-table, and the cone angle of Rotary-table 60 ° ~ 65 ° of being, are provided with thermal source import below main stove.
4. a kind of roasting aluminium hydroxide recycle-water steam system according to claim 1, is characterized in that water wall is equipped with in described suspension separation heat exchanging device inside.
5. a kind of roasting aluminium hydroxide recycle-water steam system according to claim 1, it is characterized in that described heat-exchanger rig adopts current-carrying tube liquid-solid interchanger, drum, condenser and condensate water pot to be linked together, drum is provided with safety valve, described liquid-solid interchanger is shell-and-plate(heat)exchanger or shell-and-tube, its shell side is aluminum oxide passage, and plate journey or tube side are soft water passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520658818.2U CN204918003U (en) | 2015-08-28 | 2015-08-28 | System for calcination aluminium hydroxide recycle -water steam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520658818.2U CN204918003U (en) | 2015-08-28 | 2015-08-28 | System for calcination aluminium hydroxide recycle -water steam |
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| Publication Number | Publication Date |
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| CN204918003U true CN204918003U (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520658818.2U Withdrawn - After Issue CN204918003U (en) | 2015-08-28 | 2015-08-28 | System for calcination aluminium hydroxide recycle -water steam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105000582A (en) * | 2015-08-28 | 2015-10-28 | 沈阳鑫博工业技术股份有限公司 | System and method for recycling water vapor during roasting aluminum hydroxide |
-
2015
- 2015-08-28 CN CN201520658818.2U patent/CN204918003U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105000582A (en) * | 2015-08-28 | 2015-10-28 | 沈阳鑫博工业技术股份有限公司 | System and method for recycling water vapor during roasting aluminum hydroxide |
| CN105000582B (en) * | 2015-08-28 | 2016-08-24 | 沈阳鑫博工业技术股份有限公司 | A kind of system and method for roasting aluminium hydroxide recycle-water steam |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151230 Effective date of abandoning: 20160824 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |