CN207774825U - A kind of alumina pulp pre-heating system and alumina producing system - Google Patents
A kind of alumina pulp pre-heating system and alumina producing system Download PDFInfo
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- CN207774825U CN207774825U CN201721655780.9U CN201721655780U CN207774825U CN 207774825 U CN207774825 U CN 207774825U CN 201721655780 U CN201721655780 U CN 201721655780U CN 207774825 U CN207774825 U CN 207774825U
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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
- Y02P20/10—Process efficiency
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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
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
A kind of alumina pulp pre-heating system is related to industrial equipment field, including pulp tank, roaster and cooler.Cooler includes cooling water inlet and cooling water outlet, and pulp tank includes constant temperature water inlet and constant temperature water out, cooling water inlet and thermostatted water outlet, cooling water outlet and thermostatted water inlet communication, to form first circulation circuit.It heats recirculated water using the waste heat generated during aluminium oxide calcining, and the recirculated water after it will heat is for the preheating to raw material of ore, reduction mine required energy consumption during follow-up high pressure digestion by raw material.Its efficiency of utilization is high, has environmental protection and energy saving, reduces the function of production cost.A kind of alumina producing system comprising above-mentioned alumina pulp pre-heating system.It can be recycled the waste heat after aluminium oxide calcining, and comprehensive heat utilization efficiency is high, has environmental protection and energy saving, reduces the effect of production cost.
Description
Technical field
The utility model is related to industrial equipment fields, in particular to a kind of alumina pulp pre-heating system and oxygen
Change aluminium production system.
Background technology
Bayer process is a kind of industrial widely used chemical process from bauxite into alumina.1887 by ground difficult to understand
Sharp engineer's karr Joseph Bayer utility model, basic principle are to be converted aluminium hydroxide with strong caustic
For sodium aluminate, aluminium hydroxide is set to be precipitated again by diluting and adding aluminium hydroxide crystal seed, remaining sodium hydroxide solution is again
For handling next group bauxite, continuous production is realized.Today, in the world 95% Chinalco all using Bayer process
Produce aluminium oxide.
During using alumina producing Bayer process, for the wet hydrogen aluminium oxide of Precipitation, need in roasting aluminium
Middle carry out high-temperature roasting, aluminium oxide is obtained after dehydration.The aluminium oxide of output has very high temperature, needs to handle by cooling.
In the prior art, two sections of cooling moulds of air cooling and circulating water are generally included for the cooling of high temperature alumina processing
Formula, but after carrying out heat exchange, either the hot-air of formation or hot water are failed further to be used,
The loss waste for causing heat, is unfavorable for environmental protection and energy saving and simplifies cost.
Utility model content
It, can be to the oxygen that is obtained after roasting the purpose of this utility model is to provide a kind of alumina pulp pre-heating system
The waste heat for changing aluminium is recycled, and to reach environmental protection and energy saving, reduces the purpose of production cost.
The another object of the utility model is to provide a kind of alumina producing system, integrates heat utilization efficiency height, have
Environmental protection and energy saving reduce the effect of production cost.
What the embodiments of the present invention were realized in：
A kind of alumina pulp pre-heating system, including：
Pulp tank, for before carrying out ore pulp dissolution, being stored and being preheated to ore pulp；
Roaster, for being roasted to the aluminium hydroxide that sedimentation separation obtains；
Cooler, the aluminium oxide for being obtained to roasting cool down；
Cooler includes cooling water inlet and cooling water outlet, and pulp tank includes constant temperature water inlet and constant temperature water out, cold
But water inlet and thermostatted water outlet, cooling water outlet and thermostatted water inlet communication, to form first circulation circuit.
Further, in the other preferred embodiments of the utility model, pass through between cooling water inlet and constant temperature water out
First conveyance conduit is connected to, and the first conveyance conduit is provided with circulating pump.
Further, in the other preferred embodiments of the utility model, pass through between cooling water outlet and constant temperature water inlet
Second conveyance conduit is connected to, and the second conveyance conduit is provided with hygrosensor.
Further, in the other preferred embodiments of the utility model, the second conveyance conduit is provided with reflux branch pipe, reflux
Branch pipe is connected to cooling water inlet.
Further, in the other preferred embodiments of the utility model, the second conveyance conduit is provided with triple valve, triple valve
Opening and closing for controlling reflux branch pipe.
Further, in the other preferred embodiments of the utility model, further include：
Subsider is used for the sedimentation separation of aluminum hydroxide slurry；
Evaporator, the sedimentation mother liquor for being obtained to sedimentation separation are evaporated separation；
The cold side input port of heat exchanger, heat exchanger is connected to the mother liquor outlet of subsider, and the cold side outlet port of heat exchanger is connected to
The mother liquor entrance of evaporator；The hot side entrance of heat exchanger is connected to cooling water outlet, and the hot side outlet of heat exchanger is connected to cooling
Water inlet, to form second circulation circuit.
Further, in the other preferred embodiments of the utility model, the hot side entrance of heat exchanger passes through third delivery pipe
Road is connected to cooling water outlet, and one-way throttle valve is provided on third conveyance conduit.
Further, in the other preferred embodiments of the utility model, alumina pulp pre-heating system further includes the first control
Device processed, the first controller are electrically connected with hygrosensor and triple valve respectively, and the first controller is for receiving hygrosensor biography
The temperature signal come, and control triple valve and reflux branch pipe is turned on and off.
Further, in the other preferred embodiments of the utility model, alumina pulp pre-heating system further includes the second control
Device processed, second controller are electrically connected with hygrosensor and one-way throttle valve respectively, and second controller is for receiving temperature sensing
The temperature signal that device transmits, and control the opening and closing of one-way throttle valve.
A kind of alumina producing system comprising above-mentioned alumina pulp pre-heating system.
The advantageous effect of the utility model embodiment is：
The utility model embodiment provides a kind of alumina pulp pre-heating system, including pulp tank, roaster and cooling
Device.Cooler includes cooling water inlet and cooling water outlet, and pulp tank includes constant temperature water inlet and constant temperature water out, cooling water into
Mouth and thermostatted water outlet, cooling water outlet and thermostatted water inlet communication, to form first circulation circuit.It uses aluminium oxide
The waste heat generated in roasting process heats recirculated water, and recirculated water after it will heat is used for the pre- of raw material of ore
Heat, reduction mine required energy consumption during follow-up high pressure digestion by raw material.Its efficiency of utilization is high, has environmental protection and energy saving,
Reduce the function of production cost.
The utility model embodiment additionally provides a kind of alumina producing system comprising above-mentioned alumina pulp preheating system
System.It can be recycled the waste heat after aluminium oxide calcining, and comprehensive heat utilization efficiency is high, has environmental protection and energy saving, reduces life
Produce the effect of cost.
Description of the drawings
It, below will be to required use in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
A kind of schematic diagram for alumina pulp pre-heating system that Fig. 1 is provided by the utility model first embodiment；
A kind of cooling water control stream for alumina pulp pre-heating system that Fig. 2 is provided by the utility model first embodiment
Cheng Tu；
A kind of schematic diagram for alumina pulp pre-heating system that Fig. 3 is provided by the utility model second embodiment；
A kind of cooling water control stream for alumina pulp pre-heating system that Fig. 4 is provided by the utility model second embodiment
Cheng Tu.
Icon：100- alumina pulp pre-heating systems；110- pulp tanks；120- roasters；130- coolers；141-
One conveyance conduit；142- circulating pumps；The second conveyance conduits of 143-；144- hygrosensors；145- reflux branch pipes；146- threeways
Valve；150- subsiders；160- evaporators；170- heat exchangers；181- third conveyance conduits；182- one-way throttle valves；200- is aoxidized
Aluminium ore starches pre-heating system.
Specific implementation mode
To keep the purpose, technical scheme and advantage of the utility model embodiment clearer, below in conjunction with this practicality
The technical solution in the utility model embodiment is clearly and completely described in attached drawing in novel embodiment, shows
So, described embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on this practicality
Embodiment in novel, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.Therefore, the implementation to the utility model provided in the accompanying drawings below
The detailed description of mode is not intended to limit claimed the scope of the utility model, but is merely representative of the utility model
Selected embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative labor
The every other embodiment obtained under the premise of dynamic, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be understood that term "center", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside",
The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise " be based on the orientation or positional relationship shown in the drawings, be only for
Described convenient for description the utility model and simplifying, do not indicate or imply the indicated equipment or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature.The meaning of " plurality " is two or two in the description of the present invention,
More than, unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be
Mechanical connection can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary two
The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it
"lower" may include that the first and second features are in direct contact, and can also not be to be in direct contact but lead to including the first and second features
Cross the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " above " include the
One feature is right over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.First is special
Sign second feature " under ", " lower section " and " below " include fisrt feature immediately below second feature and obliquely downward, or only
Indicate that fisrt feature level height is less than second feature.
First embodiment
A kind of alumina pulp pre-heating system 100 is present embodiments provided, it is shown referring to Fig.1 comprising pulp tank 110,
Roaster 120, cooler 130.
Alumina producing Bayer process has raw ore slurry preparation, high pressure digestion, autoclaving slurry dilution and red-mud separation and washing, crystalline substance
Kind is decomposed, aluminium hydroxide is classified and the main production processes such as washing, Aluminium hydroxide roasting, mother liquid evaporation and soda causticization.Wherein,
Pulp tank 110 is used in the preparation process of raw ore slurry, to be stored and be preheated to raw ore slurry.Roaster 120 is to right
It settles obtained aluminium hydroxide to be roasted, to obtain aluminium oxide.Cooler 130 be then for the obtained aluminium oxide of roasting into
Row cooling.In the prior art, generally use air and cooling water cool down the aluminium oxide after roasting so that this part of waste heat
With air and cooling water outflow, the waste of the energy is caused.
And in the present embodiment, as shown in Figure 1, cooler 130 includes cooling water inlet (not shown) and cooling water outlet
(not shown), meanwhile, pulp tank 110 includes constant temperature water inlet (not shown) and constant temperature water out (not shown), cooling water inlet
With thermostatted water outlet, cooling water outlet and thermostatted water inlet communication, to form first circulation circuit.Pass through the biography of recirculated water
The waste heat of roasting can be transferred in pulp tank 110 by the effect of passing while being cooled down to high temperature alumina, for pair
Raw ore slurry is preheated, and the energy consumption that raw ore slurry needs during follow-up high pressure digestion is reduced.
Further, it is connected to by the first conveyance conduit 141 between cooling water inlet and constant temperature water out, the first conveying
Pipeline 141 is provided with circulating pump 142.Circulating pump 142 provides power for conveying of the recirculated water in first circulation circuit, makes cycle
Water can preferably complete the task of heat transmission.
Meanwhile it being connected to by the second conveyance conduit 143 between cooling water outlet and constant temperature water inlet, the second conveyance conduit
143 are provided with hygrosensor 144.Hygrosensor 144 can detect the circulating water temperature at cooling water outlet, allow
User can accurately grasp the temperature of recirculated water in the second conveyance conduit 143.
As shown in Figure 1, in the present embodiment, the second conveyance conduit 143 is provided with reflux branch pipe 145, flow back branch pipe 145
It is connected to cooling water inlet.Second conveyance conduit 143 is provided with triple valve 146, and triple valve 146 is for controlling reflux branch pipe 145
Opening and closing.When hygrosensor 144 detect cooling water outlet temperature it is too low when, can pass through triple valve 146 control reflux branch
Pipe 145 is opened, and to make recirculated water come back to cooling water inlet by reflux branch pipe 145, carries out heat exchange again, until reaching
To after preset temperature, then it is delivered in pulp tank 110.Such mode can ensure the recirculated water for heating pulp tank 110
Temperature it is enough, to allow raw ore slurry adequately to be preheated, reduce raw ore slurry it is required in follow-up process in leaching
Energy consumption reaches energy-efficient purpose.
Preferably, as depicted in figs. 1 and 2, in the present embodiment, alumina pulp pre-heating system 100 further includes the first control
Device (not shown) processed, the first controller are electrically connected with hygrosensor 144 and triple valve 146 respectively.In actual production process
In, a preset value, such as 70~90 DEG C can be set to the temperature at cooling water outlet.First controller receives temperature sensing
The temperature signal that device 144 transmits, and be compared with preset temperature, when temperature signal is less than preset temperature, the first controller
Triple valve 146 is controlled to open the branch pipe 145 that flows back, recirculated water is transmitted back to coolant inlet and carries out heat exchange again, works as temperature
When signal is more than preset temperature, the first controller controls triple valve 146 with closing volume branch pipe 145, allows circulation fluid with second
Conveyance conduit 143 is delivered in pulp tank 110 and is preheated to raw ore slurry, to realize the automation control of triple valve 146.
It is arranged with the insulating layer (not shown) made of heat-barrier material outside second conveyance conduit 143.Insulating layer can be effective
Avoid heat loss of the recirculated water in transmission process, further increase the thermal efficiency of the alumina pulp pre-heating system 100.
The present embodiment additionally provides a kind of alumina producing system comprising above-mentioned alumina pulp pre-heating system 100.Its
Comprehensive heat utilization efficiency is high, has environmental protection and energy saving, reduces the effect of production cost.
Second embodiment
A kind of alumina pulp pre-heating system 200 is present embodiments provided, with reference to shown in Fig. 3, in first embodiment institute
Further improvement is carried out on the basis of a kind of alumina pulp pre-heating system 100 provided, difference is to aoxidize as follows
It further includes subsider 150, evaporator 160 and heat exchanger 170 that aluminium ore, which starches pre-heating system 200,.
As shown in figure 3, subsider 150 is mainly used for the sedimentation separation of aluminum hydroxide slurry, the mother liquor quilt after sedimentation separation
It is delivered in evaporator 160 and is evaporated separation, aluminium hydroxide then conveys to be roasted in roaster 120.Heat exchanger 170 it is cold
Side entrance is connected to the mother liquor outlet of subsider 150, and the mother liquor that the cold side outlet port of heat exchanger 170 is connected to evaporator 160 enters
Mouthful；The hot side entrance of heat exchanger 170 is connected to cooling water outlet, and the hot side outlet of heat exchanger 170 is connected to cooling water inlet, with
Form second circulation circuit.The waste heat of roasting can be passed to mother liquor by recirculated water by being recycled in second circulation circuit, from
And mother liquor is preheated, to reduce mother liquor energy consumption needed for subsequent evaporation separation process.
Further, the hot side entrance of heat exchanger 170 is connected to by third conveyance conduit 181 with cooling water outlet, third
One-way throttle valve 182 is provided on conveyance conduit 181.Second circulation circuit can work as temperature as the supplement in first circulation circuit
Degree detector 144 detect cooling water outlet temperature it is excessively high when, second circulation circuit can be opened by one-way throttle valve 182,
High temperature circulation water is shunted so that it can which heat is distributed in mother liquor, one can prevent 110 temperature mistake of pulp tank
Height, two can further avoid the loss of energy, improve whole heat utilization efficiency.
Preferably, as shown in Figure 3 and Figure 4, in the present embodiment, alumina pulp pre-heating system 100 further includes the second control
Device (not shown) processed, second controller are electrically connected with hygrosensor 144 and one-way throttle valve 182 respectively.In actual production
Cheng Zhong can set the temperature at cooling water outlet one preset value, such as 70~90 DEG C.Second controller receives temperature and visits
The temperature signal that device 144 transmits is surveyed, and is compared with preset temperature, when temperature signal is higher than preset temperature, the second control
Device controls one-way throttle valve 182 and opens, and recirculated water is allow to be recycled in first circulation circuit and second circulation circuit simultaneously, increases
Heat utilization rate.When temperature signal is when less than preset temperature or in preset temperature range, second controller control is unidirectional to be saved
It flows valve 182 to close, recirculated water is allowed only to be recycled in first circulation circuit, ensure the heat supply of pulp tank 110, to realize list
To the automation control of throttle valve 182.
Meanwhile being equally arranged with the insulating layer (not shown) made of heat-barrier material outside third conveyance conduit 181.Heat preservation
Layer can effectively avoid heat loss of the recirculated water in third conveyance conduit 181 during conveying, further increase this
The thermal efficiency of alumina pulp pre-heating system 100.
In conclusion the utility model embodiment provides a kind of alumina pulp pre-heating system, including pulp tank, roasting
Stove and cooler.Cooler includes cooling water inlet and cooling water outlet, and pulp tank includes that constant temperature water inlet and thermostatted water go out
Mouthful, cooling water inlet and thermostatted water outlet, cooling water outlet and thermostatted water inlet communication, to form first circulation circuit.
It heats recirculated water using the waste heat generated during aluminium oxide calcining, and the recirculated water after it will heat is used for mine
Starch the preheating of raw material, reduction mine required energy consumption during follow-up high pressure digestion by raw material.Its efficiency of utilization is high, has
Environmental protection and energy saving reduce the function of production cost.
The utility model embodiment additionally provides a kind of alumina producing system comprising above-mentioned alumina pulp preheating system
System.It can be recycled the waste heat after aluminium oxide calcining, and comprehensive heat utilization efficiency is high, has environmental protection and energy saving, reduces life
Produce the effect of cost.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of alumina pulp pre-heating system, including：
Pulp tank, for before carrying out ore pulp dissolution, being stored and being preheated to ore pulp；
Roaster, for being roasted to the aluminium hydroxide that sedimentation separation obtains；
Cooler, the aluminium oxide for being obtained to roasting cool down；
It is characterized in that, the cooler includes cooling water inlet and cooling water outlet, the pulp tank includes constant temperature water inlet
With constant temperature water out, the cooling water inlet and the thermostatted water outlet, the cooling water outlet and the thermostatted water into
Mouth connection, to form first circulation circuit.
2. alumina pulp pre-heating system according to claim 1, which is characterized in that the cooling water inlet and the perseverance
It is connected to by the first conveyance conduit between warm water export, first conveyance conduit is provided with circulating pump.
3. alumina pulp pre-heating system according to claim 2, which is characterized in that the cooling water outlet and the perseverance
It is connected to by the second conveyance conduit between warm water import, second conveyance conduit is provided with hygrosensor.
4. alumina pulp pre-heating system according to claim 3, which is characterized in that second conveyance conduit is provided with
Flow back branch pipe, and the reflux branch pipe is connected to the cooling water inlet.
5. alumina pulp pre-heating system according to claim 4, which is characterized in that second conveyance conduit is provided with
Triple valve, the triple valve are used to control the opening and closing of the reflux branch pipe.
6. alumina pulp pre-heating system according to claim 3, which is characterized in that further include：
Subsider is used for the sedimentation separation of aluminum hydroxide slurry；
Evaporator, the sedimentation mother liquor for being obtained to sedimentation separation are evaporated separation；
Heat exchanger, the cold side input port of the heat exchanger are connected to the mother liquor outlet of the subsider, and the cold side of the heat exchanger goes out
Mouth is connected to the mother liquor entrance of the evaporator；The hot side entrance of the heat exchanger is connected to the cooling water outlet, described to change
The hot side outlet of hot device is connected to the cooling water inlet, to form second circulation circuit.
7. alumina pulp pre-heating system according to claim 6, which is characterized in that the hot side entrance of the heat exchanger is logical
It crosses third conveyance conduit to be connected to the cooling water outlet, one-way throttle valve is provided on the third conveyance conduit.
8. alumina pulp pre-heating system according to claim 5, which is characterized in that the alumina pulp pre-heating system
Further include the first controller, first controller is electrically connected with the hygrosensor and the triple valve respectively, and described
One controller for receiving the temperature signal that the hygrosensor transmits, and control the triple valve to the reflux branch pipe into
Row is turned on and off.
9. alumina pulp pre-heating system according to claim 7, which is characterized in that the alumina pulp pre-heating system
Further include second controller, the second controller is electrically connected with the hygrosensor and the one-way throttle valve respectively, institute
Second controller is stated for receiving the temperature signal that the hygrosensor transmits, and controls the opening and closing of the one-way throttle valve.
10. a kind of alumina producing system, which is characterized in that including such as claim 1~9 any one of them alumina pulp
Pre-heating system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721655780.9U CN207774825U (en) | 2017-12-01 | 2017-12-01 | A kind of alumina pulp pre-heating system and alumina producing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721655780.9U CN207774825U (en) | 2017-12-01 | 2017-12-01 | A kind of alumina pulp pre-heating system and alumina producing system |
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| Publication Number | Publication Date |
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| CN207774825U true CN207774825U (en) | 2018-08-28 |
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| CN201721655780.9U Active CN207774825U (en) | 2017-12-01 | 2017-12-01 | A kind of alumina pulp pre-heating system and alumina producing system |
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