CN109568997A - Seed precipitation solution seven imitates evaporating and concentrating process and seven effect tube-type down-flow evaporator groups - Google Patents
Seed precipitation solution seven imitates evaporating and concentrating process and seven effect tube-type down-flow evaporator groups Download PDFInfo
- Publication number
- CN109568997A CN109568997A CN201910026179.0A CN201910026179A CN109568997A CN 109568997 A CN109568997 A CN 109568997A CN 201910026179 A CN201910026179 A CN 201910026179A CN 109568997 A CN109568997 A CN 109568997A
- Authority
- CN
- China
- Prior art keywords
- effect
- evaporator
- vii
- pot
- flash
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/26—Multiple-effect evaporating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/06—Flash distillation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
Abstract
The present invention relates to a kind of seed precipitation solution seven effect evaporating and concentrating process and seven effect tube-type down-flow evaporator groups, and wherein technique specifically includes that drawing 50%~60% vaporizing raw liquor and 40%~50% vaporizing raw liquor respectively is concentrated to get first segment discharging mother liquor and second segment discharging mother liquor；When the impurity content in solution is more than that technique requires, the first segment discharging mother liquor for drawing 20%~50% forces salt discharge；Mother liquor tank is delivered to after first segment discharging mother liquor is mixed with second segment discharging mother liquor through mother liquor discharging pump.Its seven effects tube-type down-flow evaporator group mainly includes I effect evaporator~VII effect evaporator and the first~the 4th flash-pot, I~II effect preheater, stoste flash vessel, each effect condensate water pot etc., the present invention by stoste segmentation concentration, the secondary steam that the secondary steam of flash distillation production, the secondary steam that forced circulation salt discharge evaporator generates, each flash-pot generate carried out to secondary steam, each effect condensed water that each effect evaporator generates adequately utilized, substantially increase the evaporation efficiency of entire evaporating and concentrating process.
Description
Technical field:
The present invention relates to a kind of seed precipitation solution seven effect evaporating and concentrating process and seven effect tube-type down-flow evaporator groups.
Background technique:
In contemporary national economy, the application of aluminium is almost ubiquitous, and aluminium, which has become, is only second to the most important of steel
Metal material.Metallic aluminium is to be produced using aluminium oxide as raw material by electrolyzing fused aluminium oxide.Whole world aluminium oxide produces
The above are metallurgical-grade aluminum oxides for the 90% of amount, are used for Electrowinning metallic aluminium.
Alumina producing Bayer process process flow master operation includes: raw ore slurry preparation, high pressure digestion, decomposition of crystal seed, mother
Liquid evaporation, Aluminium hydroxide roasting etc., most important is high pressure digestion and mother liquid evaporation, there is a universal saying in industry:
Evaporation is faucet, and dissolution is heart.
Seven effect tube-type down-flow evaporator groups have efficient, energy-saving distinguishing feature for mother liquid evaporation, meet " country
The high-technology field that emphasis is supported " policy requirements, there is apparent advantage, but current kind point in high efficiency of energy use aspects
Mother liquor seven imitates evaporating and concentrating process and steam consumption ratio, the secondary steam condensed water alkalinity of seven effect tube-type down-flow evaporator groups compare
Height uses existing seed precipitation solution seven to imitate evaporating and concentrating process and carries out so that 400T/h seven imitates tube-type down-flow evaporator group as an example
When evaporation and concentration, stoste feed rate about 1000m3/ h, evaporation volume in 350~370T/h, steam consumption for evaporation ratio >=0.2 ton vapour/
Ton water, secondary steam condensed water alkalinity >=30mg/L, the steam consumption will increase production cost, secondary steam condensed water contains than high
Alkali number height can then improve enterprise's cost of water treatment and the alkali of seed precipitation solution is lost.
Summary of the invention:
Present invention technical problems to be solved first are: providing that a kind of evaporation efficiency is higher, than lower kind denominator of the steam consumption
Seven effect evaporating and concentrating process of liquid.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: seven effect evaporating and concentrating process of seed precipitation solution,
It is characterised in that it includes following specific steps:
A, draw V effect evaporator, IV effect evaporator, III effect evaporator, II of 50%~60% vaporizing raw liquor through being sequentially connected in series
Imitate preheater, II effect evaporator, I effect preheater, I effect evaporator, the first flash-pot, the second flash-pot, third spontaneous evaporation
Device, the 4th flash-pot are concentrated by evaporation to obtain first segment discharging mother liquor；
B, draw stoste flash vessel, VII effect evaporator, VI effect evaporator of 40%~50% vaporizing raw liquor through being sequentially connected in series to steam
Hair is concentrated to get second segment discharging mother liquor；
C, when the impurity content in solution is more than that technique requires, the first segment for drawing 20%~50% discharges mother liquor into pressure
Circulation salt discharge evaporator is discharged into salt settling slot after being further concentrated by evaporation and carries out crystallization salt discharge；
D, mother liquor tank is delivered to after mixing first segment discharging mother liquor through mother liquor discharging pump with second segment discharging mother liquor.
E, while carrying out step a~d, draw oven heats solution of the initial steam into I effect evaporator, I effect evaporation
The secondary steam generated in the separation chamber of device enters the oven heats solution of II effect evaporator, and II imitates in the separation chamber of evaporator
The secondary steam of generation enters the oven heats solution of III effect evaporator, the secondary steaming generated in the separation chamber of III effect evaporator
Vapour enters the oven heats solution of IV effect evaporator, and the secondary steam generated in the separation chamber of IV effect evaporator enters V effect and steams
The oven heats solution of device is sent out, the secondary steam generated in the separation chamber of V effect evaporator enters the heating room of VI effect evaporator
Heated solution, the oven heats solution that VI secondary steam for imitating generation in the separation chamber of evaporator imitates evaporator into VII, VII
It imitates the secondary steam generated in the separation chamber of evaporator and enters water cooler progress condensed absorbent；
F, when carrying out step c, draw part initial steam enter the heating room of forced circulation salt discharge evaporator to solution in it into
Row heating, the oven heats for entering VI effect evaporator by the secondary steam that the separation chamber of forced circulation salt discharge evaporator generates are molten
Liquid；
G, when carrying out step a and b, by the first flash-pot, the second flash-pot, third flash-pot, the 4th spontaneous evaporation
The secondary steam that device generates respectively enters II effect preheater, the heating room of IV effect evaporator, the heating room of V effect evaporator, VI effect
The oven heats solution of evaporator；And the heating room that the secondary steam generated in stoste flash vessel then enters VII effect evaporator adds
Hot solution.
H, while carrying out step a~g, the condensed water that each heating room for imitating evaporator generates is received by this effect condensate water pot
Collection, the condensed water that the heating room of I effect evaporator generates sequentially enter the progress of I effect of effect -1#~I-n# (n≤7) condensate water pot
Flash distillation, the secondary steam of I each self-generating of the effect of effect -1#~I-n# (n≤7) condensate water pot respectively enter I~N (N≤VII) and imitate evaporation
The oven heats solution of device, the condensed water in forced circulation salt discharge evaporator heating chamber enter the flash distillation of I effect-n# condensate water pot and produce
Raw secondary steam enters the oven heats solution that N (N≤VII) imitates evaporator, and a condensed water is conveyed through a condensate pump
To a condensate draining；The time condensation water that the heating room of II~VI effect evaporator generates respectively enters lower effect condensate water pot and carries out
Multistage flash distillation, the secondary steam that II~VII effect condensate water pot generates enters the oven heats solution of this effect evaporator, secondary cold
Condensate is delivered to time condensation sink through time condensation water pump.
As a preferred embodiment, in step e, vacuum pump interface is set at the top of water cooler and connects vacuum pump, is adopted
With the incoagulable gas in vacuum pump suction water cooler, water cooler is made to form vaccum working condition.
As a preferred embodiment, in step a, each effect respective separation chamber of evaporator and heating room pass through circulation line
It is connected to, is provided with circulating pump on circulation line, each solution imitated in evaporator separating chamber is transported to upper effect evaporation through punishment in advance pump
The circulating pump feed inlet of device, wherein II effect preheater, II effect punishment in advance pump and I are equipped between III effect punishment in advance pump and II effect circulating pump
It imitates and is equipped with I effect preheater between circulating pump；In stepb, respectively the effect respective separation chamber of evaporator and heating room pass through circulation pipe
Road is connected to, and circulating pump is provided on circulation line, and the solution in VII effect evaporator separating chamber is transported to the evaporation of VI effect through punishment in advance pump
The circulating pump inlet of device；In step c, 20%~50% first segment discharging mother liquor is pumped into pressure by forced circulation charging and follows
The separation chamber of ring salt discharge evaporator, forced circulation salt discharge evaporator is connected to heating room by circulation line, is set on circulation line
It is equipped with forced circulation pump, the solution being concentrated by evaporation is completed by forced circulation discharging and is pumped into salt settling slot.
The beneficial effects of the present invention are: by stoste segmentation concentration, the secondary steam to each effect evaporator generation, each effect
Condensed water carries out the secondary steam of flash distillation production, the secondary steam that forced circulation salt discharge evaporator generates, each flash-pot and generates
Secondary steam adequately utilized, substantially increase the evaporation efficiency of entire evaporating and concentrating process, make stoste feed rate with
Tradition seven imitates evaporation technology compared to improving about 15%~25%, and evaporation volume improves about 15%~25%, and steam consumption for evaporation ratio
20% or so is then reduced, the band alkali number of secondary steam condensed water also reduces about 50% or so, evaporation efficiency is substantially increased,
Evaporation energy consumption is reduced, and reduces secondary steam band alkali number.
The further technical problems to be solved of the present invention are: providing that a kind of evaporation efficiency is higher, the steam consumption is than lower seven effect
Tube-type down-flow evaporator group.
In order to solve the above technical problems, the technical scheme adopted by the invention is that: one kind seven imitates tube-type down-flow evaporator group,
For implementing above-mentioned seven effects evaporating and concentrating process, including I effect evaporator~VII effect evaporator, which is characterized in that further include stoste
Flash vessel, the first flash-pot~the 4th flash-pot, I effect preheater, II effect preheater and forced circulation salt discharge evaporator,
Wherein, V effect evaporator, IV effect evaporator, III effect evaporator, II effect preheater, II effect evaporator, I effect preheater, I effect evaporation
Device, the first flash-pot~the 4th flash-pot, which successively couple, forms first segment solution concentration circuit；Stoste flash vessel, VII effect are steamed
Hair device, VI effect evaporator, which successively couple, forms second segment solution concentration circuit；Portion after first segment solution concentration circuit concentration
Divide solution shunt to enter forced circulation salt discharge evaporator and forms third section solution concentration circuit；
The secondary steam outlet of each effect evaporator separating chamber is connected to the heating room steam inlet of lower 1st effective evaporator, I effect
The steam inlet of evaporator is connected to initial steam pipeline, and the secondary steam outlet of VII effect evaporator is connected to water cooler；
The steam inlet of forced circulation salt discharge evaporator heating chamber is connected to initial steam pipeline, forced circulation salt discharge evaporator
The secondary steam outlet of separation chamber is connected to the heating room steam inlet of VI effect evaporator；
The secondary steam outlet of first order flash-pot is connected to II effect preheater, and the two of second~fourth stage flash-pot
Secondary steam (vapor) outlet is connected to IV~VI effect evaporator heating chamber's steam inlet respectively；
The secondary steam outlet of stoste flash vessel is connected to VII effect evaporator heating chamber's steam inlet；
I effect of effect -1#~I-n# (n≤7) condensate water pot, I effect-n# condensate water pot are connected in turn on the I effect evaporator
A condensate draining is connected by a condensate pump；It is respectively arranged on I effect of effect -1#~I-n# (n≤7) condensate water pot secondary
Steam (vapor) outlet, the secondary steam outlet of I effect of effect -1#~I-n# (n≤7) condensate water pot are separately connected 1~N (N≤VII) and imitate evaporation
Device heats room steam inlet；
Second condensed water tank~VII effect condensate water pot has been connected respectively on the II effect evaporator~VII effect evaporator,
Second condensed water tank~VII effect condensate water pot is sequentially connected in series, and second condensed water tank~VII effect condensate water pot upper end offers steam
Outlet, second condensed water tank~VII effect condensate water pot steam (vapor) outlet are communicated to II effect evaporator~VII effect evaporation correspondingly
Device heats the steam inlet of room, and VII effect condensate water pot connects time condensation sink by time condensation water pump.
As a preferred embodiment, tops are provided with row's fixed gas system on I~VII effect evaporator, to be discharged in time
It is mixed into a small amount of air and other incoagulable gas of water vapour.
As a preferred embodiment, I~VII effect respective separation chamber of evaporator is connected to heating room by circulation line, is followed
Endless tube road is provided with circulating pump, and the discharge port of above-mentioned each effect evaporator separating chamber is connected to upper 1st effective evaporator by punishment in advance pump
Circulating pump feed inlet, wherein III effect punishment in advance pump II effect circulating pump between be equipped with II effect preheater, II effect punishment in advance pump and I effect follows
I effect preheater is equipped between ring pump；VI effect, the VII effect respective separation chamber of evaporator are connected to heating room by circulation line, are followed
Endless tube road is provided with circulating pump, and the discharge port of VII effect evaporator separating chamber is connected to the circulation of VI effect evaporator by punishment in advance pump
Pump feed inlet；The feed inlet of forced circulation salt discharge evaporator is connected by the discharge port of forced circulation feed pump and the 4th flash-pot
Logical, the separation chamber of forced circulation salt discharge evaporator is connected to heating room by circulation line, and pressure is provided on circulation line and is followed
The discharge port of ring pump, forced circulation salt discharge evaporator is connected to by forced circulation discharging pump with salt settling slot.
As a preferred embodiment, I~VII effect evaporator is split type, is respectively included setting up and down and interconnected
I~VII effect tube type falling-film heating room and I~VII effect liquid collecting room, I~VII effect separation for being disposed side by side on I~VII effect liquid collecting room side
Room, I~VII effect liquid collecting room passes through correspondingly with I~VII effect separation chamber to be connected each communicating pipe.
As a preferred embodiment, I~VII effect liquid collecting room, the bottom of I~VII effect separation chamber are tapered, and the first~the 4th
The bottom of flash-pot is also tapered.
As a preferred embodiment, the heating room steam inlet of II effect evaporator passes through the first shut-off valve and initial steam pipeline
The heating room steam inlet of connection, II effect evaporator is exported by separation chamber's secondary steam of the second shut-off valve and I effect evaporator
Separation chamber's discharge port of connection, II effect evaporator is connected to by third shut-off valve with the first flash-pot, point of II effect evaporator
It is connected to by the 4th shut-off valve with I effect preheater from room discharge port, separation chamber's discharge port of the I effect evaporator passes through the 5th section
Only valve is connected to the first flash-pot.
The beneficial effects of the present invention are: due to it is of the present invention seven effect tube-type down-flow evaporator group by I~VII imitate evaporator
Two sections of solution concentration circuits are distributed into, shortens the path in solution concentration circuit, improves thickening efficiency, wherein one section is dodged by stoste
Steaming device tentatively flash improve solution concentration, then enter back into negative pressure operating condition VII effect evaporator, VI effect evaporator be further concentrated,
The thickening efficiency for improving this section of solution concentration circuit obtains the evaporation efficiency of entire seven effects tube-type down-flow evaporator group greatly
Width is promoted, and carries out salt discharge to solution using forced circulation salt discharge evaporator, controls impurity concentration in solution.
Meanwhile by the steam-return line of optimization design, makes full use of the separation chamber of I~VII effect evaporator, respectively imitates condensed water
The secondary steam of separation chamber's generation of tank, the first~the 4th flash-pot and stoste flash vessel, forced circulation salt discharge evaporator
Thermal energy heats solution, effectively reduces steam energy consumption.
Further by being preheated to the solution for entering II effect evaporator and I effect evaporator, improves and enter II effect evaporation
The solution temperature of device and I effect evaporator reaches or approaches this effect solution boiling point, improves solution in I effect evaporator heating chamber and II effect
Membrane type heat transfer efficiency in evaporator heating chamber, the final evaporation efficiency for improving I effect evaporator and II effect evaporator.
Detailed description of the invention:
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing, in which:
Fig. 1 is the solution concentration flow path figure of technique of the present invention；
Fig. 2 is the steam utilization flow chart of technique of the present invention；
Fig. 3 is the condensed water heat energy utilization flow chart of technique of the present invention；
Fig. 4 is the structural schematic diagram of seven effects tube-type down-flow evaporator group of the present invention；
Fig. 5 is the structural schematic diagram of I effect evaporator of the present invention；
Fig. 6 is the specific attachment structure schematic diagram of I effect evaporator of the present invention and II effect evaporator.
In Fig. 4~Fig. 6: 1, I effect evaporator, 1-1, I effect tube type falling-film heater, 1-2, I effect liquid collecting room, 1-3, I effect point
From room, 1-4, communicating pipe, 2, II effect evaporator, 3, III effect evaporator, 4, IV effect evaporator, 5, V imitates evaporator, and 6, VI effect is steamed
Send out device, 7, VII effect evaporator, 8, stoste flash vessel, the 9, first flash-pot, the 10, second flash-pot, 11, third spontaneous evaporation
Device, the 12, the 4th flash-pot, 13, I effect preheater, 14, II effect preheater, 15, forced circulation salt discharge evaporator, 16, mother liquor goes out
Material pump, 17, stoste feed pump, 18, row's fixed gas system, 19, water cooler, 20-1, I effect -1# condensate water pot, 20-2, I effect -2#
Condensate water pot, 20-3, I effect -3# condensate water pot, 20-4, I effect -4# condensate water pot, 20-5, I effect -5# condensate water pot, 21, primary
Condensate pump, 22, second condensed water tank, 23, III effect condensate water pot, 24, IV effect condensate water pot, 25, V effect condensate water pot, 26,
VI effect condensate water pot, 27, VII effect condensate water pot, 28, time condensation water pump, 29, circulating pump, 30, punishment in advance pump, 31, forced circulation
Feed pump, 32, forced circulation pump, 33, forced circulation discharging pump, the 34, first shut-off valve, 35, initial steam pipeline, 36, second sections
Only valve, 37, third shut-off valve, the 38, the 4th shut-off valve, the 39, the 5th shut-off valve, 40, pressure effect condensate water pot.
Specific embodiment:
With reference to the accompanying drawing, detailed description of the present invention specific embodiment.
As shown in FIG. 1 to 3, seven effect evaporating and concentrating process of seed precipitation solution, comprise the following specific steps that:
A, draw V effect evaporator, IV effect evaporator, III effect steaming of 50% or 55% or 60% vaporizing raw liquor through being sequentially connected in series
Send out device, II effect preheater, II effect evaporator, I effect preheater, I effect evaporator, the first flash-pot, the second flash-pot, third
Flash-pot, the 4th flash-pot are concentrated by evaporation to obtain first segment discharging mother liquor, wherein~V respective point of evaporator of effect of I effect
It is connected to heating room by circulation line from room, circulating pump is provided on circulation line, each solution imitated in evaporator separating chamber
The circulating pump feed inlet of upper 1st effective evaporator is transported to through punishment in advance pump, wherein being equipped with II between III effect punishment in advance pump and II effect circulating pump
Preheater is imitated, I effect preheater, such as separation chamber and the heating of III effect evaporator are equipped between II effect punishment in advance pump and I effect circulating pump
Room is connected to by external circulation line, and circulating pump, the part solution in III effect evaporator separating chamber are provided on circulation line
It can be conveyed by circulating pump into the heating room of III effect evaporator, form circulation loop, be concentrated repeatedly, in III effect evaporator separating chamber
Part can also be pumped by punishment in advance and be transported to II effect preheater, from the circulating pump charging for flowing into II effect evaporator after solution is preheated
Mouthful, the heating room that the circulating pump through II effect evaporator is transported to II effect evaporator is heated, and is can ensure that in this way from III effect evaporation
The solution that device separation chamber enters II effect evaporator fully enters the heating room of II effect evaporator, without being directly entered the evaporation of II effect
The separation chamber of device avoids the inefficient cycle of solution.
B, stoste flash vessel of 50% or 45% or 40% vaporizing raw liquor through being sequentially connected in series after step a shunting, VII effect
Evaporator, VI effect evaporator are concentrated by evaporation to obtain second segment discharging mother liquor；VII effect evaporator, the VI effect respective separation chamber of evaporator
It is connected to heating room by external circulation line, circulating pump is provided on circulation line, it is molten in VII effect evaporator separating chamber
Liquid is transported to the circulating pump inlet of VI effect evaporator through punishment in advance pump.
C, when impurity (sodium carbonate, sodium sulphate etc.) content in solution is more than that technique requires, with forced circulation feed pump
Draw 20%~50% first segment discharging mother liquor be further concentrated by evaporation into forced circulation salt discharge evaporator after be discharged into salt settling slot
Carry out crystallization salt discharge；The separation chamber of forced circulation salt discharge evaporator is connected to heating room by circulation line, is set on circulation line
It is equipped with forced circulation pump, the solution being concentrated by evaporation is completed by forced circulation discharging and is pumped into salt settling slot.
D, mother liquor tank is delivered to after mixing first segment discharging mother liquor through mother liquor discharging pump with second segment discharging mother liquor.
E, while carrying out step a~d, draw oven heats solution of the initial steam into I effect evaporator, I effect evaporation
The secondary steam generated in the separation chamber of device enters the oven heats solution of II effect evaporator, and II imitates in the separation chamber of evaporator
The secondary steam of generation enters the oven heats solution of III effect evaporator, the secondary steaming generated in the separation chamber of III effect evaporator
Vapour enters the oven heats solution of IV effect evaporator, and the secondary steam generated in the separation chamber of IV effect evaporator enters V effect and steams
The oven heats solution of device is sent out, the secondary steam generated in the separation chamber of V effect evaporator enters the heating room of VI effect evaporator
Heated solution, the oven heats solution that VI secondary steam for imitating generation in the separation chamber of evaporator imitates evaporator into VII, VII
It imitates the secondary steam generated in the separation chamber of evaporator and enters direct contact type water cooler progress condensed absorbent；
F, when carrying out step c, draw part initial steam enter the heating room of forced circulation salt discharge evaporator to solution in it into
Row heating, the oven heats for entering VI effect evaporator by the secondary steam that the separation chamber of forced circulation salt discharge evaporator generates are molten
Liquid；
G, when carrying out step a and b, the secondary steam generated by the first flash-pot heats molten in it into II effect preheater
Liquid respectively enters IV effect evaporator by the secondary steam that the second flash-pot, third flash-pot, the 4th flash-pot generate
Heat the oven heats solution for heating room, VI effect evaporator of room, V effect evaporator.
H, while carrying out step a~g, the condensed water that the heating room of~VII effect evaporator of I effect generates is condensed by this effect
Water pot is collected, wherein to sequentially enter I effect of effect -1#~I-n# (n≤7) cold for a condensed water of the heating room generation of I effect evaporator
Condensate tank is flashed, the secondary steam of I each self-generating of the effect of effect -1#~I-n# (n≤7) condensate water pot respectively enter I~N (N≤
VII) the oven heats solution of evaporator is imitated, the condensed water that the heating room of forced circulation salt discharge evaporator generates enters I
The secondary steam that the flash distillation of effect-n# (n≤7) condensate water pot generates enters the oven heats solution of corresponding N effect evaporator；I effect-
A condensed water in n# (n≤7) condensate water pot is delivered to a condensate draining through a condensate pump；II~VI effect evaporator
Heating room generate time condensation water respectively enter III~VII effect condensate water pot carry out multistage flash distillation, II~VII effect condensate water pot
The secondary steam of generation enters the oven heats solution of this effect evaporator；Time condensation water is delivered to two through time condensation water pump
Secondary condensate draining, wherein n=5, N=V.
In step e, vacuum pump interface is set at the top of direct contact type water cooler and connects vacuum pump (such as Fig. 4 institute
Show), the incoagulable gas in water cooler is directly contacted using vacuum pump suction, makes directly to contact water cooler formation vaccum working condition,
Accelerate secondary steam to enter water cooler to be condensed, it is ensured that VII effect evaporator separating chamber stable gas pressure improves evaporation efficiency.
Fig. 4~Fig. 6 is that one kind seven imitates tube-type down-flow evaporator group, for implementing above-mentioned seven effects evaporating and concentrating process, such as Fig. 4
Shown, seven effect tube-type down-flow evaporator groups include that I effect evaporator 1~VII imitates evaporator 7, further include stoste flash vessel 8, first from
Evaporator 9~the 4th flash-pot 12, I effect preheater 13, II imitates preheater 14 and forced circulation salt discharge evaporator 15,
In, V effect evaporator 5, IV imitates the effect effect effect evaporator 2, I of preheater 14, II of evaporator 3, II of evaporator 4, III and imitates preheater 13, I
Effect evaporator 1, the 9~the 4th flash-pot 12 of the first flash-pot, which successively couple, forms first segment solution concentration circuit；Stoste is dodged
The effect effect evaporator 6 of evaporator 7, VI of steaming device 8, VII, which successively couples, forms second segment solution concentration circuit；It is concentrated through first segment solution
Part solution after the concentration of circuit is further separated into forced circulation salt discharge evaporator 15 and forms third section solution concentration circuit；
First segment solution is concentrated circuit and is met with second segment solution concentration circuit for being concentrated by evaporation solution with obtaining concentration
It is required that mother liquor, be divided into two sections of concentrations and improve thickening efficiencies, reduce energy consumptions, third section solution concentration circuit is for controlling in mother liquor
Impurity concentration, it is ensured that mother liquor quality.
The 9~the 4th flash-pot 12 of the first flash-pot in first segment solution concentration circuit can not need external offer
In the case where heat, the high temperature that has using solution itself, high pressure condition carry out expander, portion are flashed off in solution
Steam in two times, while the temperature of solution, pressure reduction, concentration increase.It can in the 9~the 4th flash-pot 12 of first flash-pot
It is respectively arranged with demister, vapor-liquid separation is carried out to secondary steam, removal band lye drips, and keeps the secondary steam of discharge cleaner.
Solution is circulated during " flash distillation " simultaneously in the 9~the 4th flash-pot 12 of the first flash-pot, is made
Flash distillation carries out more complete.
Second segment solution is concentrated in circuit, and stoste flash vessel 8 can effectively reduce solution temperature, improves solution concentration, makes molten
Liquid temperature is reduced with solution temperature difference in VII effect evaporator 7, reduces flash distillation severe degree when solution enters VII effect evaporator 7,
The workload for reducing demister (not shown) in VII effect 7 separation chamber of evaporator is substantially reduced and is separated from VII effect evaporator 7
The band alkali number of the secondary steam of room discharge.
As shown in figure 4, separation chamber's discharge port of the discharge port of the 4th flash-pot 12, VI effect evaporator 6 passes through mother liquor
Discharging pump 16 connects mother liquor tank.
In the present embodiment, stoste imitates evaporator 5 to stoste flash vessel 8, V respectively by stoste feed pump 17 and conveys stoste.
In the present embodiment, tops are provided with row's fixed gas system 18 on I~VII effect evaporator, are mixed into timely discharge
The a small amount of air and other incoagulable gas of water vapour.
The secondary steam outlet of each effect evaporator separating chamber is connected to the heating room steam inlet of lower 1st effective evaporator, VII effect
The secondary steam outlet of evaporator 7 is connected to direct contact type water cooler 19, quickly absorbs two using directly contact water cooler 19
Secondary steam makes the secondary steam of VII effect evaporator 7 accelerate evolution, improves evaporation efficiency；
Initial steam pipeline is connected to the heating room steam inlet of forced circulation salt discharge evaporator 15, forced circulation salt discharge evaporation
Separation chamber's secondary steam outlet of device 15 is connected to the heating room steam inlet of VI effect evaporator 6, makes full use of pressure effect circulation
The secondary steam generated in the separation chamber of salt discharge evaporator 15.
The outlet of 9 secondary steam of first order flash-pot is connected to II effect preheater 14, second level flash-pot 10~4th
The heating room steam inlet that evaporator 6 is imitated with IV effect evaporator 4~VI respectively in the secondary steam outlet of grade flash-pot 12 is connected to.
The secondary steam outlet of stoste flash vessel 8 is connected to the heating room steam inlet of VI effect evaporator 6, makes full use of original
The secondary steam of liquid flash vessel 8；It is also equipped with demister in stoste flash vessel 7, to reduce the band alkali number of secondary steam.
I effect the -1# condensate water pot effect of 20-1~I-n# (n≤7) condensate water pot 20- is connected in turn on the I effect evaporator 1
N, I effect-n# condensate water pot 20-n condensate draining of connection；I effect the -1# condensate water pot effect of 20-1~I-n# (n≤7) condensate water pot
It is respectively arranged with secondary steam on 20-n to export, the two of I effect the -1# condensate water pot effect of 20-1~I-n# (n≤7) condensate water pot 20-n
Secondary steam (vapor) outlet is separately connected 1~N (N≤VII) and imitates evaporator heating chamber's steam inlet；The water outlet of I effect-n# condensate water pot 20-n
Mouth is connected to a condensate pump 21, and a condensed water in I effect-n# condensate water pot 20-n is discharged into one through a condensate pump 21
Secondary condensate draining.
In the present embodiment, n=5, N=V a, condensed water is recycled by 5 flash distillations recycling secondary steam, is filled
Divide the thermal energy of condensed water of recycling, reduces steam consumption for evaporation.
The heating room lower part of forced circulation salt discharge evaporator 15 in the present embodiment is connected to effect condensate water pot 40 is forced, should
It forces the secondary steam outlet of effect condensate water pot 40 to be connected to the heating room top of forced circulation salt discharge evaporator 15, forces effect cold
The water outlet of condensate tank 40 is connected to the water inlet of I effect -5# condensate water pot 20-5, the heating room of forced circulation salt discharge evaporator 15
Condensed water of interior generation, after forcing the flash distillation for the first time of effect condensate water pot 40, again into I effect -5# condensate water pot 20-5
Flash distillation, the secondary steam of generation enter the oven heats solution of V effect evaporator 5.
The II effect evaporator 2~VII, which is imitated, has been connected respectively the effect condensation of second condensed water tank 22~VII on evaporator 7
Water pot 27, second condensed water tank 22~VII are imitated condensate water pot 27 and are sequentially connected in series, and second condensed water tank 22~VII imitates condensate water pot 27
Upper end offers steam (vapor) outlet, and the steam (vapor) outlet that second condensed water tank 22~VII imitates condensate water pot 27 is communicated to correspondingly
II effect evaporator 2~VII imitates the heating room steam inlet of evaporator 7, and VII effect condensate water pot 27 is connected by time condensation water pump 28
Secondary steam condensate draining.
The setting that condensate water pot 27 is imitated by above-mentioned second condensed water tank 22~VII, to the II effect effect evaporation of evaporator 2~VII
The thermal energy for the time condensation water that device 7 generates adequately is recycled, and steam consumption for evaporation is further decreased.
I effect evaporator 1~V imitates the respective separation chamber of evaporator 5 and heating room and passes through outer loop pipeline connection, circulation
Circulating pump 29 is provided on pipeline, solution circulation flow is dynamic some or all of in driving this effect evaporator of circulating pump 29 evaporates repeatedly
The discharge port of concentration, above-mentioned each effect evaporator separating chamber is fed by the circulating pump 29 that punishment in advance pump 30 is connected to upper 1st effective evaporator
Mouthful, to solution is directly sent at 29 feed inlet of circulating pump of upper 1st effective evaporator, the circulating pump 29 through upper 1st effective evaporator
The heating heating indoor of 1st effective evaporator, avoids solution from being sent directly into the separation chamber of 1st effective evaporator and cause nothing in feeding
Effect circulation.Such as III effect evaporator 3 separation chamber and heating room by outer loop pipeline connection, be provided with and follow on circulation line
Ring pump 29, III effect evaporator 3 separate indoor part solution and can be conveyed by circulating pump 29 into the heating room of III effect evaporator 3,
Circulation loop is formed, is concentrated repeatedly, III effect evaporator 3, which separates indoor part, to be transported to the preheating of II effect by punishment in advance pump 30
Device 14 flows automatically after preheated and enters 29 feed inlet of circulating pump of II effect evaporation 2, and the circulating pump 29 through II effect evaporator 2 is transported to
The heating room of II effect evaporator 2 is heated, and is can ensure that in this way from III effect 3 separation chamber of evaporator and is entered the molten of II effect evaporator 2
Liquid fully enters the heating room of II effect evaporator 2, and the separation chamber without being directly entered II effect evaporator 2 avoids the nothing of solution
Effect circulation.
VI effect evaporator 6, VII is imitated the respective separation chamber of evaporator 7 circulation line for passing through outside same as room is heated and is connected
It is logical, circulating pump 29 is again provided on circulation line, the discharge port of VII effect 7 separation chamber of evaporator is connected to VI by punishment in advance pump 30
Imitate 29 feed inlet of circulating pump of evaporator 6；The feed inlet of forced circulation salt discharge evaporator 15 by forced circulation feed pump 31 with
The discharge port of 4th flash-pot 12 is connected to, and the separation chamber and heating room of forced circulation salt discharge evaporator 15 are connected by circulation line
It is logical, forced circulation pump 32 is provided on circulation line, the discharge port of forced circulation salt discharge evaporator 15 is discharged by forced circulation
Pump 33 is connected to salt settling slot.
It is split type structure that I effect evaporator 1~VII, which imitates evaporator 7, in the present embodiment, respectively includes setting up and down and phase
Connect I~VII effect tube type falling-film heating room and I~VII effect liquid collecting room, be disposed side by side on I~VII effect liquid collecting room side I~
VII effect separation chamber, I~VII effect liquid collecting room passes through correspondingly with I~VII effect separation chamber to be connected each communicating pipe.
Since I effect effect 7 structure of evaporator of evaporator 1~VII is similar, to avoid repeating, by taking I effect evaporator 1 as an example, in detail
Illustrate that the split type structure of I effect evaporator 1, the split type structure of II~VII effect evaporator imitate evaporator 1 referring to I.
As shown in figure 5, I effect evaporator 1 is I effect tube type falling-film heating split type including setting up and down and interconnected
The effect of room 1-1 and I liquid collecting room 1-2, I effect the separation chamber 1-3, I effect liquid collecting room 1-2 and I for being disposed side by side on I side effect liquid collecting room 1-2
Effect separation chamber 1-3 is connected by communicating pipe 1-4.
I effect evaporator 1~VII imitates the respective liquid collecting room of evaporator 7 and the bottom of separation chamber is tapered, and the first~the 4th
The bottom of flash-pot is also tapered, and solution flow velocity in it is very fast, and solution is easy to wash away, and is not easy to generate deposition, avoids tying
The generation of scar, it is ensured that the heat transfer efficiency of equipment.
I split type effect evaporator 1 provides bigger flash distillation space, improves evaporation efficiency, and I effect liquid collecting room 1-2 is collected
After temperature reaches the solution of boiling point, the solution of the fluidized state on liquid level is sent into I effect separation chamber 1- by communicating pipe 1-4
Flash distillation in 3, it is ensured that imitate the solution of separation chamber 1-3 in fluidized state into I, it is ensured that flash evaporation effect.
As shown in fig. 6, the heating room steam inlet of II effect evaporator 2 is connected by the first shut-off valve 34 with initial steam pipeline 35
Logical, the heating room steam inlet of II effect evaporator 2 is gone out by separation chamber's secondary steam of the second shut-off valve 36 and I effect evaporator 1
Separation chamber's discharge port of mouth connection, II effect evaporator 2 is connected to by third shut-off valve 37 with the first flash-pot 9, and II effect is evaporated
Separation chamber's discharge port of device 2 is connected to by the 4th shut-off valve 38 with I effect preheater 13, separation chamber's discharging of the I effect evaporator 1
Mouth is connected to by the 5th shut-off valve 39 with the first flash-pot 9.
By the control to the first~the 5th shut-off valve, I effect evaporator 1 can individually be isolated, and by initial steam into
Enter in II effect evaporator 2, to realize when I effect 1 maintenance shut-downs of evaporator, seven effects tube type falling-film evaporation of the present invention
Device group can continue the evaporation and concentration of solution as six effect tube-type down-flow evaporator groups, to reduce production cost, improve production effect
Rate.
The present embodiment passes through in the secondary steam that generates to stoste segmentation concentration, to each effect evaporator, each effect condensate water pot
The secondary steam generated, the secondary steam that forced circulation salt discharge evaporator 15 generates, the first~the 4th flash-pot is flashed to generate
Secondary steam and stoste flash vessel 8 generate secondary steam adequately utilized, substantially increase entire evaporation and concentration
The evaporation efficiency of technique makes stoste feed rate improve about 15%~25% compared with tradition seven imitates evaporation technology, evaporation volume
About 15%~25% is improved, and steam consumption for evaporation ratio then reduces 20% or so, the band alkali number of secondary steam condensed water also reduces
About 50% or so, evaporation efficiency is substantially increased, evaporation energy consumption is reduced, and reduces secondary steam band alkali number.
Below be using seed precipitation solution seven of the present invention effect evaporating and concentrating process and seven effect tube-type down-flow evaporator groups into
The evaporation effect of row seed precipitation solution concentration is planted with using the effect evaporating and concentrating process of seed precipitation solution seven of domestic certain producer design
The evaporation effect deck watch (by taking 400T/h seven imitates tube-type down-flow evaporator group as an example) of decomposition mother solution concentration:
In upper table, for cooling down the cooling water of secondary steam used by recirculated cooling water, that is, water cooler 19.
By the comparison of upper table as it can be seen that imitating evaporating and concentrating process and seven effect tubular type drops using seed precipitation solution seven of the present invention
Film evaporator group carries out the concentration of seed precipitation solution, and inlet amount, evaporation volume, steam-water ratio, secondary steam condensed water alkalinity, circulation are cold
But water alkalinity, being lauched value containing alkaline error etc. in circulating cooling, all indicators are better than the indices of traditional handicraft.
The principles and effects of the invention, and the embodiment that part uses only is illustrated in above-described embodiment,
And is not intended to limit the present invention；It should be pointed out that for those of ordinary skill in the art, not departing from the invention structure
Under the premise of think of, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Claims (9)
1. seven effect evaporating and concentrating process of seed precipitation solution, which is characterized in that comprise the following specific steps that:
A, it is pre- to draw V effect evaporator of 50%~60% vaporizing raw liquor through being sequentially connected in series, IV effect evaporator, III effect evaporator, II effect
Hot device, II effect evaporator, I effect preheater, I effect evaporator, the first flash-pot, the second flash-pot, third flash-pot, the
Four flash-pots are concentrated by evaporation to obtain first segment discharging mother liquor；
B, it is dense to draw stoste flash vessel of 40%~50% vaporizing raw liquor through being sequentially connected in series, VII effect evaporator, VI effect evaporator evaporation
Contracting obtains second segment discharging mother liquor；
C, when the impurity content in solution is more than that technique requires, the first segment for drawing 20%~50% discharges mother liquor into forced circulation
Salt discharge evaporator is discharged into salt settling slot and carries out crystallization salt discharge after being further concentrated by evaporation；
D, mother liquor tank is delivered to after mixing first segment discharging mother liquor through mother liquor discharging pump with second segment discharging mother liquor；
E, while carrying out step a~d, draw initial steam into the oven heats solution of I effect evaporator, I imitates evaporator
The secondary steam generated in separation chamber enters the oven heats solution of II effect evaporator, generates in the separation chamber of II effect evaporator
Secondary steam enter III effect evaporator oven heats solution, III effect evaporator separation chamber in generation secondary steam into
Enter the oven heats solution of IV effect evaporator, the secondary steam generated in the separation chamber of IV effect evaporator enters V effect evaporator
Oven heats solution, V effect evaporator separation chamber in generate secondary steam enter VI imitate evaporator oven heats
Solution, VI imitates the oven heats solution that the secondary steam generated in the separation chamber of evaporator enters VII effect evaporator, VII effect steaming
It sends out the secondary steam generated in the separation chamber of device and enters water cooler progress condensed absorbent；
F, when carrying out step c, draw part initial steam and enter the heating room of forced circulation salt discharge evaporator solution in it is added
Heat is entered the oven heats solution of VI effect evaporator by the secondary steam that the separation chamber of forced circulation salt discharge evaporator generates；
G, it when carrying out step a and b, is produced by the first flash-pot, the second flash-pot, third flash-pot, the 4th flash-pot
Raw secondary steam respectively enters II effect preheater, the heating room of IV effect evaporator, the heating room of V effect evaporator, VI effect evaporation
The oven heats solution of device；And the oven heats that the secondary steam generated in stoste flash vessel then enters VII effect evaporator are molten
Liquid.
H, while carrying out step a~g, the condensed water that each heating room for imitating evaporator generates is collected by this effect condensate water pot, and I
The condensed water that the heating room of effect evaporator generates sequentially enters I effect of effect -1#~I-n# (n≤7) condensate water pot and is flashed,
The secondary steam of I each self-generating of the effect of effect -1#~I-n# (n≤7) condensate water pot respectively enters I~N (N≤VII) and imitates adding for evaporator
Hot cell heated solution, the condensed water in forced circulation salt discharge evaporator heating chamber enter two that the flash distillation of I effect-n# condensate water pot generates
Secondary steam enters the oven heats solution that N (N≤VII) imitates evaporator, and a condensed water is delivered to once through a condensate pump
Condensate draining；The time condensation water that the heating room of II~VI effect evaporator generates respectively enters lower effect condensate water pot and carries out Multi-stage flash
It steams, the secondary steam that II~VII effect condensate water pot generates enters the oven heats solution of this effect evaporator, time condensation water warp
Time condensation water pump is delivered to time condensation sink.
2. seven effect evaporating and concentrating process of seed precipitation solution according to claim 1, which is characterized in that in step e, in water cooling
The top setting vacuum pump interface of device simultaneously connects vacuum pump, using the incoagulable gas in vacuum pump suction water cooler, makes water cooling
Device forms vaccum working condition.
3. seven effect evaporating and concentrating process of seed precipitation solution according to claim 1, which is characterized in that each to imitate in step a
The respective separation chamber of evaporator is connected to heating room by circulation line, and circulating pump is provided on circulation line, respectively imitates evaporator
The circulating pump feed inlet that indoor solution is transported to upper 1st effective evaporator through punishment in advance pump is separated, wherein III effect punishment in advance pump and II effect are followed
It is equipped with II effect preheater between ring pump, I effect preheater is equipped between II effect punishment in advance pump and I effect circulating pump；In stepb, each effect
The respective separation chamber of evaporator is connected to heating room by circulation line, and circulating pump, VII effect evaporator are provided on circulation line
Separate the circulating pump inlet that indoor solution is transported to VI effect evaporator through punishment in advance pump；In step c, 20%~50% the first
Section discharging mother liquor is pumped into forced circulation salt discharge evaporator by forced circulation charging, the separation chamber of forced circulation salt discharge evaporator and
It heats room to be connected to by circulation line, is provided with forced circulation pump on circulation line, the solution for completing to be concentrated by evaporation is followed by forcing
Ring discharging is pumped into salt settling slot.
4. one kind seven imitates tube-type down-flow evaporator group, for implementing above-mentioned seven effects evaporating and concentrating process, including I effect evaporator~VII
Imitate evaporator, which is characterized in that further include stoste flash vessel, the first flash-pot~the 4th flash-pot, I effect preheater, II
Imitate preheater and forced circulation salt discharge evaporator, wherein V effect evaporator, IV effect evaporator, III effect evaporator, II effect preheating
Device, II effect evaporator, I effect preheater, I effect evaporator, the first flash-pot~the 4th flash-pot successively couple formation first
Circuit is concentrated in section solution；Stoste flash vessel, VII effect evaporator, VI effect evaporator, which successively couple, to be formed second segment solution and is concentrated back
Road；Part solution after first segment solution concentration circuit concentration is further separated into forced circulation salt discharge evaporator and forms third Duan Rong
Circuit is concentrated in liquid；
The secondary steam outlet of each effect evaporator separating chamber is connected to the heating room steam inlet of lower 1st effective evaporator, I effect evaporation
The steam inlet of device is connected to initial steam pipeline, and the secondary steam outlet of VII effect evaporator is connected to water cooler；
The steam inlet of forced circulation salt discharge evaporator heating chamber is connected to initial steam pipeline, the separation of forced circulation salt discharge evaporator
The secondary steam outlet of room is connected to the heating room steam inlet of VI effect evaporator；
The secondary steam outlet of first order flash-pot is connected to II effect preheater, the secondary steaming of second~fourth stage flash-pot
Vapor outlet is connected to IV~VI effect evaporator heating chamber's steam inlet respectively；
The secondary steam outlet of stoste flash vessel is connected to VII effect evaporator heating chamber's steam inlet；
I effect of effect -1#~I-n# (n≤7) condensate water pot is connected in turn on the I effect evaporator, and I effect-n# condensate water pot passes through
No. one time condensate pump connects a condensate draining；Secondary steam is respectively arranged on I effect of effect -1#~I-n# (n≤7) condensate water pot
Outlet, the secondary steam outlet of I effect of effect -1#~I-n# (n≤7) condensate water pot are separately connected 1~N (N≤VII) effect evaporator and add
Hot cell steam inlet；
Second condensed water tank~VII effect condensate water pot, II effect have been connected respectively on the II effect evaporator~VII effect evaporator
Condensate water pot~VII effect condensate water pot is sequentially connected in series, and second condensed water tank~VII effect condensate water pot upper end offers steam and goes out
Mouthful, second condensed water tank~VII effect condensate water pot steam (vapor) outlet is communicated to II effect evaporator~VII effect evaporator correspondingly
The steam inlet of room is heated, VII effect condensate water pot connects time condensation sink by time condensation water pump.
5. a kind of seven effects tube-type down-flow evaporator group according to claim 4, which is characterized in that on I~VII effect evaporator
Tops are provided with row's fixed gas system, and a small amount of air and other incoagulable gas of water vapour are mixed into timely discharge.
6. a kind of seven effects tube-type down-flow evaporator group according to claim 4, which is characterized in that I~VII effect evaporator is each
From separation chamber be connected to heating room by circulation line, circulating pump is provided on circulation line, above-mentioned each effect evaporator separates
The discharge port of room is connected to the circulating pump feed inlet of upper 1st effective evaporator by punishment in advance pump, wherein III effect punishment in advance pump and II effect are followed
It is equipped with II effect preheater between ring pump, I effect preheater is equipped between II effect punishment in advance pump and I effect circulating pump；VI effect, VII effect evaporator
Respective separation chamber is connected to heating room by circulation line, and circulating pump, VII effect evaporator separating chamber are provided on circulation line
Discharge port the circulating pump feed inlet of VI effect evaporator is connected to by punishment in advance pump；The feed inlet of forced circulation salt discharge evaporator is logical
It crosses and recycle feed pump is forced to be connected to the discharge port of the 4th flash-pot, the separation chamber and heating room of forced circulation salt discharge evaporator
It is connected to by circulation line, forced circulation pump is provided on circulation line, the discharge port of forced circulation salt discharge evaporator passes through strong
System circulation discharging pump is connected to salt settling slot.
7. a kind of seven effects tube-type down-flow evaporator group according to claim 4, which is characterized in that I~VII effect evaporator is equal
Be it is split type, respectively include I~VII effect tube type falling-film heating room setting up and down and interconnected and I~VII effect liquid collecting room, simultaneously
I~VII effect separation chamber of I~VII effect liquid collecting room side is arranged in row, and I~VII effect liquid collecting room and I~VII effect separation chamber correspond
Ground is connected by each communicating pipe.
8. a kind of seven effects tube-type down-flow evaporator group according to claim 7, which is characterized in that I~VII effect liquid collecting room, I
The bottom of~VII effect separation chamber is tapered, and the bottom of the first~the 4th flash-pot is also tapered.
9. a kind of seven effects tube-type down-flow evaporator group according to claim 4, which is characterized in that the heating of II effect evaporator
Room steam inlet is connected to by the first shut-off valve with initial steam pipeline, and the heating room steam inlet of II effect evaporator passes through second section
Separation chamber's discharge port of only separation chamber's secondary steam outlet of valve and I effect evaporator, II effect evaporator is ended by third
Valve is connected to the first flash-pot, and separation chamber's discharge port of II effect evaporator is connected to by the 4th shut-off valve with I effect preheater, institute
The separation chamber's discharge port for stating I effect evaporator is connected to by the 5th shut-off valve with the first flash-pot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910026179.0A CN109568997A (en) | 2019-01-11 | 2019-01-11 | Seed precipitation solution seven imitates evaporating and concentrating process and seven effect tube-type down-flow evaporator groups |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910026179.0A CN109568997A (en) | 2019-01-11 | 2019-01-11 | Seed precipitation solution seven imitates evaporating and concentrating process and seven effect tube-type down-flow evaporator groups |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109568997A true CN109568997A (en) | 2019-04-05 |
Family
ID=65916229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910026179.0A Pending CN109568997A (en) | 2019-01-11 | 2019-01-11 | Seed precipitation solution seven imitates evaporating and concentrating process and seven effect tube-type down-flow evaporator groups |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109568997A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112619196A (en) * | 2020-12-21 | 2021-04-09 | 大连广泰源环保科技有限公司 | Non-condensable gas recovery process and system for evaporation system |
| CN115607987A (en) * | 2022-10-17 | 2023-01-17 | 中盐长江盐化有限公司 | Seven-effect vacuum salt making process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101624199A (en) * | 2009-08-10 | 2010-01-13 | 杭州锦江集团有限公司 | Separation method of sodium salt in seed separation mother liquor of aluminum oxide |
| CN203852856U (en) * | 2014-05-06 | 2014-10-01 | 郑州海利化工装备有限公司 | Seven-effect and three-section evaporation indirect-condensation evaporator set for concentrated sodium aluminate solution |
| CN209809543U (en) * | 2019-01-11 | 2019-12-20 | 江苏普格机械有限公司 | Seven-effect tube type falling film evaporator set |
-
2019
- 2019-01-11 CN CN201910026179.0A patent/CN109568997A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101624199A (en) * | 2009-08-10 | 2010-01-13 | 杭州锦江集团有限公司 | Separation method of sodium salt in seed separation mother liquor of aluminum oxide |
| CN203852856U (en) * | 2014-05-06 | 2014-10-01 | 郑州海利化工装备有限公司 | Seven-effect and three-section evaporation indirect-condensation evaporator set for concentrated sodium aluminate solution |
| CN209809543U (en) * | 2019-01-11 | 2019-12-20 | 江苏普格机械有限公司 | Seven-effect tube type falling film evaporator set |
Non-Patent Citations (1)
| Title |
|---|
| 张志斌;周风江;荆全海;路晓涛;许罡正;: "蒸发技术在氧化铝行业中的应用", 湿法冶金, vol. 35, no. 04, pages 275 - 279 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112619196A (en) * | 2020-12-21 | 2021-04-09 | 大连广泰源环保科技有限公司 | Non-condensable gas recovery process and system for evaporation system |
| CN115607987A (en) * | 2022-10-17 | 2023-01-17 | 中盐长江盐化有限公司 | Seven-effect vacuum salt making process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104803535B (en) | A kind of recovery system and recovery process for reclaiming salt from desulfurization wastewater | |
| CN107008027B (en) | Multi-effect evaporation concentration process, evaporation crystallization process and device for salt solution containing sulfuric acid and sulfuric acid | |
| CN104003422B (en) | Disposing mother liquor method new technology | |
| CN106746136A (en) | The technique of zero discharge and system of a kind of desulfurization wastewater | |
| CN203852856U (en) | Seven-effect and three-section evaporation indirect-condensation evaporator set for concentrated sodium aluminate solution | |
| CN204485354U (en) | A kind of evaporated crystallization device to ammonium chloride when producing potassium nitrate | |
| CN206508573U (en) | A kind of function of mechanical steam recompression evaporation and crystallization system of high-salt wastewater | |
| CN206853151U (en) | A kind of Multi-effect evaporation compression apparatus, the evaporated crystallization device of sulfur acid and its salting liquid | |
| CN108298569A (en) | A kind of device and its production method producing hydronium(ion) lithia based on MVR | |
| CN109568997A (en) | Seed precipitation solution seven imitates evaporating and concentrating process and seven effect tube-type down-flow evaporator groups | |
| CN203852855U (en) | Six-efficiency three-segment evaporation indirect condensation evaporator group for concentrated sodium aluminate solution | |
| CN209809545U (en) | Six-effect tube type falling film evaporator set | |
| CN212119064U (en) | Evaporation crystallization treatment production line | |
| CN108341429A (en) | A kind of post-processing approach of black titanium liquid and its device used | |
| CN106629938A (en) | Four-effect vacuum energy-saving evaporative crystallization system for high-concentration saline wastewater | |
| CN209809543U (en) | Seven-effect tube type falling film evaporator set | |
| CN208182650U (en) | Ammonium sulphate waste liquor desalting processing equipment | |
| CN103613106A (en) | Technique for preparing ammonium chloride by employing sodium bicarbonate production wastewater as raw material | |
| CN207845410U (en) | A kind of zinc borate production wastewater treatment equipment | |
| CN215781585U (en) | Multiple-effect evaporation crystallizer suitable for viscose fiber acid bath concentration crystallization | |
| CN206970384U (en) | A kind of Zero discharging system of desulfurization wastewater | |
| CN217526401U (en) | Evaporation crystallization device for producing lithium chloride from salt lake brine | |
| CN102464346A (en) | Seven-effect falling film evaporation technology for sodium aluminate solution | |
| CN202080906U (en) | Four-effect evaporator applied to sodium bichromate evaporation technology | |
| CN208292675U (en) | A kind of black titanium liquid continuously post-processes process units |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |