CN208667120U - The hybrid technique equipment of evaporation and twin driving composition - Google Patents
The hybrid technique equipment of evaporation and twin driving composition Download PDFInfo
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- CN208667120U CN208667120U CN201721918109.9U CN201721918109U CN208667120U CN 208667120 U CN208667120 U CN 208667120U CN 201721918109 U CN201721918109 U CN 201721918109U CN 208667120 U CN208667120 U CN 208667120U
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Abstract
The utility model discloses the hybrid technique equipment of a kind of evaporation and twin driving composition, it be by aluminium oxide Bayer process production system evaporation and dissolution two big steam consumption systems be combined together, establish a new heat balance system, to obtain relatively succinct process, and it can reduce investment outlay, conducive to the production of full factory, the simplification of control system, cooperation mother liquor scale inhibition reagent is scabbed using nothing, more efficient compared with the prior art, reliable, section vapour.
Description
Technical field
The utility model relates to a kind of evaporation of producing aluminium oxide by bayer-dissolution mixture length and its equipment, belong to oxygen
Change aluminium production technical field.
Background technique
In the process flow of producing aluminium oxide by bayer, digestion workshop and liquor evaporating plant are two wherein critically important works
Section.Wherein digestion workshop is responsible for leaching Al in bauxite2O3, main Leach reaction occurs herein, different ore type institutes
The temperature for needing to heat is different, and the sequence of required temperature from low to high is followed successively by gibbsite, boehmite, a hydraulic aluminium
Stone, respectively 145 DEG C or so, 220 DEG C or so, 260 DEG C or so.Due to needing energy saving as far as possible in industrialized production,
Therefore in Bayer process production, in order to reduce the consumption of initial steam, prior art digestion workshop and liquor evaporating plant must be to secondary
Steam is efficiently used, and cooperation preheater forms more complicated process, is especially most three with the high temperature dissolution of diaspore
The dissolution process of diaspore is slightly simpler.
The gibbsite of the prior art dissolves out general flow chart such as Fig. 2, three stages of flashing, three-level preheating, the heating of level-one initial steam.
The dissolution process of diaspore then needs ten grades of flash distillations to control, approximate with the process of gibbsite in principle.
In the prior art due to needing to guarantee that each preheater of dissolution, initial steam heater have higher heat transfer efficiency, need
Ore pulp carries out atmospheric silicon removing before dissolving out, in case the low temperature silicon in ore scabs in each preheater tube wall precipitation of dissolution, thus right
Heat transfer efficiency has a negative impact, therefore usually needs to set up another atmospheric silicon removing workshop before dissolution, such as Fig. 3 institute
Show.
The liquor evaporating plant of the prior art, which is then mainly responsible for, evaporates the excessive moisture brought into entire Baeyer circulation, so that
Alkali in whole flow process can recycle.The workshop is critically important to establishing of recycling of entire Baeyer, needs decomposition nut liquid inspissation extremely
The alkali concentration needed.In the prior art, countercurrent evaporation is highly developed, and the whole system thermal efficiency, running rate are relatively high, and operation is steady
Fixed, environment is clean and tidy, by taking sextuple-effect evaporation as an example, basic procedure such as Fig. 4.
Current technology all comparative maturities, but process CIMS is complicated, and equipment is more, configuration land occupation.By simulating and calculating, look for
To it is a kind of it is more succinct, energy conservation, and also very reliable process be very it is necessary to.
Utility model content
The purpose of the utility model is to provide the hybrid technique equipment of a kind of evaporation and twin driving composition, existing to overcome
There is the deficiency of technology.
The technical solution of the utility model is as follows:
The utility model is the hybrid technique equipment of such a evaporation and twin driving composition, it is to visit aluminium oxide
Evaporation and two big steam consumption systems of dissolution in your method production system are combined together, and establish a new heat balance system；
Wherein, vapo(u)rization system is by 1st effective evaporator, 2nd effect evaporator, triple effect evaporator, last evaporator and water cooler and secondary vapour
First and second vapour condensate water self-evaporating device two of condensate water self-evaporating device, secondary vapour condensate water self-evaporating device three composition, initial steam heating
Device and digester, primary flash device and two-stage flash device form digestion series, and two systems are interrelated, collectively form a heat
Balance system.
Wherein, last evaporator connects water cooler, meanwhile, last evaporator connects triple effect evaporator, and triple effect evaporator connects
2nd effect evaporator is connect, 2nd effect evaporator connects 1st effective evaporator, and 1st effective evaporator connects heater, and heater connects digester,
Digester connects primary flash device, and primary flash device connects two-stage flash device；Heater connection live steam condensed water flash vessel, one
It imitates evaporator and connects secondary vapour condensate water self-evaporating device one, 2nd effect evaporator connects secondary vapour condensate water self-evaporating device two, triple effect
Evaporator connects secondary vapour condensate water self-evaporating device three.
Further, the either number of devices of vapo(u)rization system or digestion series equipment, can be according to actual dissolution
Temperature needs and increases and decreases.
The utility model also proposed the hybrid technique process using the evaporation of the equipment and twin driving composition, the stream
Journey is in the Bayer process production of diaspore, boehmite and gibbsite, which to be based on above equipment
By in aluminium oxide Bayer process production system evaporation and dissolution two big steam consumption systems be combined together, establish a new heat
Balance system to obtain relatively succinct process, and can reduce investment outlay, and conducive to the production of full factory, the simplification of control system, cooperation is female
Liquid scale inhibition reagent is scabbed using nothing, more efficient compared with the prior art, reliable, section vapour.The process can be used for diaspore, one
In the Bayer process production technology of boehmite and gibbsite.It is described so that the low temperature of gibbsite dissolves out process as an example.Specific work
Skill process is as follows: vaporizing raw liquor is divided into two parts, and most of stoste enters evaporation system from four-effect evaporator (or last evaporator)
System, least a portion of stoste and bauxite mix convey so that mixing is solid containing 800g/L or so is reached convenient for ore slurry pump.Into
The mother liquor for entering evaporator 4 no longer flashes after triple effect evaporator, 2nd effect evaporator and 1st effective evaporator countercurrent evaporation, is directly entered
Dissolve out initial steam heater, mixed after being heated to sufficiently high temperature with the high concentration bauxite slurry of low temperature, into digester into
The main chemical reaction of row, the mother liquor temperature that initial steam heater comes out depend on slurry temperature after the dissolution that digester comes out,
For this sentences gibbsite, slurry temperature is 145 DEG C or so after dissolution, and mother liquor temperature requires heat to 193 DEG C or so.It is molten
Ore pulp enters primary flash device after out, mixes after lightening the secondary steam purification come with live steam condensed water secondary steam, as
The gas source of 1st effective evaporator, the ore pulp that primary flash device comes out go successively to two-stage flash device, then go to next workshop section.Second level is dodged
The secondary vapour come out after the secondary vapour purification of steaming device with 1st effective evaporator separation chamber mixes, the heating gas as 2nd effect evaporator
Source.Water cooler provides negative pressure source for whole system.Whole flow process mother liquor obtains relatively independent heating, can be with fiting chemical reagent
Use prevent the generation to scab.
The utility model has the advantage that
(1) by the original main flow problem for needing three workshops to solve, simple is a workshop processing, simplifies process,
It reduces investment outlay cost, industrialized production is more reasonable.
(2) cooperation prevents the chemical reagent of spent liquor scaling from using, and all heat transfer units remove the puzzlement that scabs from, and heat transfer efficiency is more
Height, running rate is higher, is extremely conducive to production.
(3) working condition is flexible and changeable, for example evaporation volume needs change and change so as to cause steam demand amount
When, the flow of vapo(u)rization system can be entered to adjust steam consumption quantity indirectly by adjusting evaporation mother liquor, thus stablize production, or
Initial steam is added in vapo(u)rization system reserve steam mouth to meet the uncontrollable requirement of production.
(4) process compared with the prior art three workshops form process, steam consumption is slightly lower, more economically, operation at
This is lower.
(5) come compared with the prior art, occupied area is reduced significantly.
Detailed description of the invention
Fig. 1 is the process flow chart of the utility model；
Fig. 2 is the gibbsite dissolution general flow chart of the prior art；
Fig. 3 is the atmospheric silicon removing workshop schematic diagram of the prior art；
Fig. 4 is the sextuple-effect evaporation basic procedure schematic diagram of the prior art.
Description of symbols: 1- 1st effective evaporator, 2- 2nd effect evaporator, 3- triple effect evaporator, 4- last evaporator, 5- water
Cooler, bis- vapour condensate water self-evaporating devices one of 6-, bis- vapour condensate water self-evaporating devices two of 7-, bis- vapour condensate water self-evaporating devices of 8-
Three, 9- heater, 10- digester, 11- primary flash device, 12- two-stage flash device, 13- live steam condensed water flash vessel.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples, but appoints not as to the utility model
What is limited.
Embodiment 1:
As shown in Figure 1, the utility model will evaporate process and twin driving technique combines, with the low temperature of gibbsite
For dissolution, such as Fig. 1.For vaporizing raw liquor in addition to participating in ore grinding part, remaining fully enters the last evaporator 4 of evaporation section, into
Row countercurrent evaporation is no longer flashed, is directly entered molten after coming out to 1st effective evaporator 1 through triple effect evaporator 3,2nd effect evaporator 2
The initial steam heater 9 of part out, it is mixed with low temperature large arch dam bauxite slurry after temperature needed for being heated to subsequent digester 10
It closes, reaches dissolution required temperature, stopped into digester 10, the alumina leaching in bauxite is entered in solution.After dissolution
Ore pulp enters primary flash device 11, controls the saturation reheat steam temperature degree of the primary flash device 11 to meet the temperature of vapo(u)rization system gas
Degree and gas consumption requirement, aforementioned evaporation system does not add initial steam, secondary with the secondary vapour and initial steam of primary flash device 11
Vapour is used as gas source, the initial steam process (chain-dotted line part) of vapo(u)rization system as shown in the figure as starting or case of emergency.
It goes successively to the cooling of two-stage flash device 12 from the ore pulp of primary flash device 11 out and lightens secondary vapour make for 2nd effect evaporator 2
With to obtain both economical energy consumption index.Finished product dissolved mineral slurry is just obtained after coming out from two-stage flash device 12.
The process only heats mother liquor, make mother liquor temperature be increased to after required temperature again enter digester 10 before with it is low
Warm ore pulp mixing.Due to whole system heating target be liquid, rather than be rich in bauxite ore particles ore pulp, therefore it is all plus
The heat transfer efficiency of hot device 9 is very high, and due to not having bauxite ore particles to wash away heat transfer tube wall, the longevity of institute's having heaters 9
Life greatly improves, therefore the running rate of whole system is higher than the prior art.It, can due to no longer worrying the problem of preheater scabs
To save pre-desiliconizing workshop (such as Fig. 3).
In the process, the temperature of dissolution is depended on using the effect number of evaporation process.When leaching condition changes, dissolution is warm
When degree requires higher, more effect numbers are can be used in evaporation process.
When a water is soft or diaspore uses the process, since leaching temperature greatly improves, it is thus possible to use six
The effect even process of seven effects or even more multiple-effect, the steam consumption can be lower, can show relative to the better business efficiency of former technology, and
And the effect number of evaporation section is mainly dependent on the evaporation volume of full factory at that time.Process under these operating conditions, with this flow chart principle
Equally, it is not limited, is covered by within the utility model by this flow chart.
The specific application example of above only the utility model, there are also other embodiments, all uses for the utility model
The technical solution that equivalent substitution or equivalent transformation is formed, all falls within protection scope required by the utility model.
Claims (2)
1. the hybrid technique equipment of a kind of evaporation and twin driving composition, it is characterised in that: aluminium oxide Bayer process is produced system
Evaporation and two big steam consumption systems of dissolution in system are combined together, and establish a new heat balance system；Wherein, evaporation system
System is by 1st effective evaporator (1), 2nd effect evaporator (2), triple effect evaporator (3), last evaporator (4) and water cooler (5) and two
Secondary vapour condensate water self-evaporating device one (6), secondary vapour condensate water self-evaporating device two (7), secondary three (8) group of vapour condensate water self-evaporating device
At, initial steam heater (9) and digester (10), primary flash device (11) and two-stage flash device (12) composition digestion series, two
A system collectively forms a heat balance system；The last evaporator (4) connects water cooler (5), meanwhile, last evaporator
(4) triple effect evaporator (3) are connected, triple effect evaporator (3) connects 2nd effect evaporator (2), one effect evaporation of 2nd effect evaporator (2) connection
Device (1), 1st effective evaporator (1) connect heater (9), and heater (9) connects digester (10), and digester (10) connects level-one and dodges
Steaming device (11), primary flash device (11) connect two-stage flash device (12)；Heater (9) connects live steam condensed water flash vessel
(13), 1st effective evaporator (1) connects secondary vapour condensate water self-evaporating device one (6), and 2nd effect evaporator (2) connects secondary vapour condensed water
Flash-pot two (7), triple effect evaporator (3) connect secondary vapour condensate water self-evaporating device three (8).
2. the hybrid technique equipment of evaporation according to claim 1 and twin driving composition, it is characterised in that: either
The number of devices of vapo(u)rization system or digestion series equipment needs all in accordance with actual leaching temperature and is increased and decreased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201721918109.9U CN208667120U (en) | 2017-12-30 | 2017-12-30 | The hybrid technique equipment of evaporation and twin driving composition |
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| CN201721918109.9U CN208667120U (en) | 2017-12-30 | 2017-12-30 | The hybrid technique equipment of evaporation and twin driving composition |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107915243A (en) * | 2017-12-30 | 2018-04-17 | 贵阳铝镁设计研究院有限公司 | The hybrid technique equipment and its technological process of evaporation and twin driving composition |
| CN112684772A (en) * | 2020-12-31 | 2021-04-20 | 贵阳振兴铝镁科技产业发展有限公司 | Thermal balance control system and method for dissolving out aluminum oxide |
-
2017
- 2017-12-30 CN CN201721918109.9U patent/CN208667120U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107915243A (en) * | 2017-12-30 | 2018-04-17 | 贵阳铝镁设计研究院有限公司 | The hybrid technique equipment and its technological process of evaporation and twin driving composition |
| CN112684772A (en) * | 2020-12-31 | 2021-04-20 | 贵阳振兴铝镁科技产业发展有限公司 | Thermal balance control system and method for dissolving out aluminum oxide |
| CN112684772B (en) * | 2020-12-31 | 2024-05-03 | 贵阳振兴铝镁科技产业发展有限公司 | Heat balance control system and method for aluminum oxide dissolution |
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