CN107137945A - Falling film evaporation system and its vacuum plant - Google Patents
Falling film evaporation system and its vacuum plant Download PDFInfo
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- CN107137945A CN107137945A CN201710363762.1A CN201710363762A CN107137945A CN 107137945 A CN107137945 A CN 107137945A CN 201710363762 A CN201710363762 A CN 201710363762A CN 107137945 A CN107137945 A CN 107137945A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0082—Regulation; Control
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- 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
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- 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
Abstract
The present invention provides a kind of vacuum plant of falling film evaporation system, including the first condenser, the first coolant cycling mechanism, vavuum pump and the second condenser.Steam inlet, coolant inlet and non-condensable gas export are interval with second condenser, the indirect steam outlet that the steam inlet of first condenser and the steam inlet of second condenser are used to a last evaporator is connected, the coolant inlet of second condenser is used to be passed through coolant into second condenser, to be condensed to the steam for entering second condenser；The non-condensable gas export of first, second condenser is connected with the vavuum pump.The present invention also provides a kind of falling film evaporation system using the vacuum plant.Above-mentioned falling film evaporation system and its vacuum plant can improve the vacuum of system.
Description
【Technical field】
The present invention relates to vaporizer technology field, and in particular to a kind of falling film evaporation system and its vacuum plant.
【Background technology】
Evaporator is the capital equipment of solution concentration, in aluminum oxide production process, using six effects more than mother liquor evaporation processes
Adverse current tube-type down-flow evaporator, the low-pressure steam of evaporator consumption accounts for 30% or so of aluminum oxide total energy consumption, therefore reduction evaporation
The steam consumption of device is reduction alumina producing total energy consumption, reduction by one important measures of production cost.
By rate of heat transfer equation (Q=KF Δ t, wherein, Q is rate of heat transfer, and K is overall coefficient of heat transfer, and F is heat transfer area,
Δ t is effective temperature difference) understand, evaporator operational efficiency depends primarily on the total temperature difference of system.System is improved in evaporation process
Total temperature difference has two approach, and one is the heating steam pressure for improving first evaporator, and two be the vacuum for improving last evaporator.
But the heating steam pressure for improving first evaporator can bring rear a few effect temperature rises, the raising of production capacity is not obvious,
The problems such as fouling exacerbation, the cycle of operation are shortened, increase equipment corrosion can be caused on the contrary.Therefore, it is increase system to improve vacuum
The first choice of total temperature difference.
The factor of influence vacuum has a lot, mainly there is two：The condensation of indirect steam and the exclusion of fixed gas.Such as Fig. 1
Shown, the vacuum system of typically now large-scale vaporising device adds vavuum pump 250 to constitute by condenser 210, coolant cycling mechanism.
Coolant cycling mechanism includes water sealed tank 230, cooling tower 250, circulating water pool 240 and water circulating pump 260.Last evaporator 200
The indirect steam of generation is directly contacted in the condenser 210 with cooling water and is condensed rapidly, system is formed vacuum, fixed gas by
Vavuum pump 250 is drained.Last evaporator 200 produce indirect steam from the bottom of condenser 210 enter, with from top add it is cold
But water is directly contacted, and indirect steam is constantly condensed, and makes system formation vacuum, and condensate liquid and cooling water are as together with the lower water of circulation
Into water sealed tank 230, after being cooled by cooling tower 250, finally enter circulating water pool 240 and used as recirculated water.Indirect steam
The key being condensed is cooling water, and cooling water inflow is bigger, and temperature is lower, and indirect steam condensation effect is better, system vacuum
It is higher.So to expect higher vacuum, it must just try every possible means to improve cooling water inflow or reduce coolant water temperature.But,
Circulating water temperature is cooled by cooling tower 250, in the certain situation of the ability of cooling tower 250, it is difficult to by circulating water temperature
Further reduction, meanwhile, the ability of water circulating pump 260 also determines that the quantity delivered of cooling water inflow is certain.For reduction cooling
Water temperature, people increase many set cooling towers 250 and carry out radiating and cooling generally using increase coolant cycling mechanism method.However,
The floor space and energy consumption of cooling tower 250 are all larger.Excessive increase cooling tower 250 inevitably results in system footprint area and energy consumption
Increase substantially so that production cost improve.To improve the quantity delivered of cooling water in addition, need to increase water circulating pump 260 or
The water supply capacity of water circulating pump 260 is transformed, this increase that can all cause investment and the rising of cost.
【The content of the invention】
For above-mentioned problem, it is necessary to provide a kind of falling film evaporation system that can improve system vacuum and its
Vacuum plant.
To reach above-mentioned purpose, the technical solution adopted in the present invention is：
A kind of vacuum plant of falling film evaporation system, the falling film evaporation system includes last evaporator, the vacuum holding
Put including the first condenser, the first coolant cycling mechanism and vavuum pump, the first coolant cycling mechanism connection described the
The coolant inlet of the outlet at bottom of one condenser and first condenser, to be passed through cooling into first condenser
Liquid, the vavuum pump is connected with the non-condensable gas export of first condenser, and the vacuum plant also includes the second condenser,
Steam inlet, coolant inlet and non-condensable gas export, the steaming of first condenser are interval with second condenser
The indirect steam outlet that the steam inlet of vapour entrance and second condenser is used to the last evaporator is connected, described
The coolant inlet of second condenser is used to be passed through coolant into second condenser, with to entering second condenser
Steam condensed；The non-condensable gas export of second condenser is connected with the vavuum pump.
Further, the first coolant cycling mechanism includes the first water sealed tank, cooling tower, circulating water pool and water pump,
First water sealed tank is connected with the outlet at bottom of first condenser, and the water inlet of the water pump passes sequentially through the circulation
It is connected behind pond and the cooling tower with first water sealed tank, the cooling of the delivery port of the water pump and first condenser
Liquid entrance is connected.
Further, the vacuum plant also includes heat exchanger, and being interval with steam inlet, steam on the heat exchanger goes out
The steam inlet of mouth, coolant inlet and cooling liquid outlet, the steam inlet of first condenser and second condenser
Steam (vapor) outlet with the heat exchanger is connected, and the steam inlet on the heat exchanger is used for secondary with the last evaporator
Steam (vapor) outlet is connected, with will first condenser, second condenser and the last evaporator by the heat exchanger
Coolant inlet on connection, the heat exchanger into the heat exchanger to be passed through coolant, with to entering the heat exchanger
Interior steam is cooled；Cooling liquid outlet on the heat exchanger is to discharge the coolant after heat exchange.
Further, the heat exchanger has a condensation-water drain, and the condensation-water drain passes through a pipeline and described the
One water sealed tank is connected.
Further, the coolant being passed through in the heat exchanger is that power plant carrys out demineralized water.
Further, the coolant inlet of second condenser includes the first coolant inlet, cold via described first
But the coolant that liquid entrance is passed through in second condenser is that pipe network comes water coolant, the first cooling of second condenser
Liquid entrance connects a delivery pipe, and end of the delivery pipe away from second condenser is used to connect with a pipe network.
Further, the pipe network carrys out water coolant and comes sewage and pipe network including pipe network to produce water, and the delivery pipe is remote
One end branch from second condenser formed for two communicating pipes, was used to two communicating pipes be connected with the pipe network, wherein
One communicating pipe carried out sewage for transmission pipeline network, another communicating pipe was used to transmission pipeline network produce water, two communicating pipes are equal
Provided with the pipeline valve for controlling corresponding communicating pipe break-make.
Further, the coolant inlet of second condenser includes spaced with first coolant inlet
Second coolant inlet, the vacuum plant also includes the second coolant cycling mechanism, the second coolant cycling mechanism bag
The second water sealed tank, circulating pump, connecting tube and circulation pipe are included, the outlet at bottom of second water sealed tank and second condenser connects
Logical, second water sealed tank is connected by the connecting tube with the circulating pump, and the circulating pump is connected by the circulation pipe
Second coolant inlet, to be entered using the coolant in second water sealed tank to the steam for entering second condenser
Row condensation.
Further, the vacuum plant also includes return pipe, and one end of the return pipe is connected with the circulation pipe, institute
Stating the other end of return pipe is used to be connected with the pipe network, and the coolant in second water sealed tank is returned into the pipe network,
The return pipe is provided with the on-off valve for controlling the return pipe break-make.
The present invention also provides a kind of falling film evaporation system, including last evaporator and vacuum plant, the vacuum plant bag
The first condenser, the first coolant cycling mechanism and vavuum pump are included, the first coolant cycling mechanism connection described first is cold
The coolant inlet of the outlet at bottom of condenser and first condenser, to be passed through coolant into first condenser, institute
The non-condensable gas export that vavuum pump is stated with first condenser is connected, and the vacuum plant also includes the second condenser, described
Steam inlet, coolant inlet and non-condensable gas export are interval with second condenser, the steam of first condenser enters
The steam inlet of mouth and second condenser is connected with the indirect steam outlet of the last evaporator, second condensation
The coolant inlet of device is used to be passed through coolant into second condenser, to enter to the steam for entering second condenser
Row condensation；The non-condensable gas export of second condenser is connected with the vavuum pump.
Due to using above-mentioned technical proposal, the invention has the advantages that：
1st, falling film evaporation system and its vacuum plant of the invention, the indirect steam of last evaporator are divided into two-way and existed respectively
Condensed in first condenser and the second condenser so that enter the steaming of former condenser, the i.e. indirect steam of the first condenser
Vapour amount is reduced, and in the case where the former cooling liquid measure of the first coolant cycling mechanism of holding is constant, is gone out from the first condenser bottom
Coolant-temperature gage cools than not increasing decreasing before the second condenser by the first coolant cycling mechanism under the circulation of mouth discharge
Afterwards so that be again introduced into the coolant temperature of the first condenser than not increasing the reduction before the second condenser, so as to improve and be
The vacuum of system so that the operational efficiency of falling film evaporation system is improved.Meanwhile, can also be by the coolant inlet of the second condenser
Coolant is passed through into the second condenser, the purpose of increase cooling liquid measure is reached, further increases the vacuum of system so that
The operational efficiency of falling film evaporation system is improved.
2nd, falling film evaporation system and its vacuum plant of the invention, the indirect steam using heat exchanger and last evaporator enter
Row heat exchange, reduces the temperature of indirect steam, and the steam after cooling is separated into two-way and condensed respectively in the first condenser and second
Condensed in device so that enter former condenser, the i.e. indirect steam of the first condenser and not only measure reduction, and temperature is reduced,
In the case where keeping former cooling liquid measure constant, coolant-temperature gage is changed than not increasing under the circulation discharged from the first condenser outlet at bottom
Reduction before hot device, after the cooling of the first coolant cycling mechanism so that be again introduced into the coolant temperature of the first condenser
Than not increasing the reduction before heat exchanger, the vacuum of system is further increased.
3rd, of the invention falling film evaporation system and its vacuum plant, the second condenser by the use of pipe network water as coolant,
The coolant of heat exchanger is using power plant come demineralized water, and power plant's demineralized water, pipe network water are all that the cold water source of heating is needed in production,
In the prior art, these cooling water sources are required to the consumption energy and heated, and the present invention is by these water sources for falling film evaporation system
The heat exchange of system indirect steam, has reached energy-saving purpose.
【Brief description of the drawings】
Fig. 1 is the structural representation of prior art falling film evaporation system.
Fig. 2 is the structural representation of the falling film evaporation system of a better embodiment of the invention.
In accompanying drawing, 100- falling film evaporation systems, 2,200- last evaporators, the outlet of 23- indirect steams, 4- vacuum plants,
The condensers of 42- first, the first coolants of 43- cycling mechanism, the water sealed tanks of 432- first, 434,250- cooling towers, 435,240- are followed
Ring pond, 436- water pumps, 44- heat exchangers, 442- steam inlets, 443- steam (vapor) outlets, 446- cooling liquid outlets, 45- second are cold
Condenser, 452,425-- steam inlets, 423,445- coolant inlets, the coolant inlets of 4532- first, the coolants of 4534- second
Entrance, 454,424-- non-condensable gas exports, 422- outlet at bottoms, 46,250- vavuum pumps, 5- branched pipes, 6- pipelines, 7- conveyings
Pipe, 72- communicating pipes, 74- pipeline valves, the second coolants of 8- cycling mechanism, the water sealed tanks of 82- second, 84- circulating pumps, 86- connections
Pipe, 862- water valves, 88- circulation pipes, 9- return pipes, 92- on-off valves, 210- condensers, 230- water sealed tanks, 260- recirculated waters
Pump.
【Embodiment】
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
It should be noted that when component is referred to as " being fixed on " another component, it can be directly on another component
Or can also have component placed in the middle.When a component is considered as " connection " another component, it can be directly connected to
To another component or it may be simultaneously present component placed in the middle.When a component is considered as " being arranged at " another component, it
Can be set directly on another component or may be simultaneously present component placed in the middle.Term as used herein is " vertical
", " level ", "left", "right" and similar statement for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more phases
The arbitrary and all combination of the Listed Items of pass.
Fig. 2 is referred to, a better embodiment of the invention provides a kind of falling film evaporation system 100, including last evaporator 2
And vacuum plant 4.Vacuum plant 4 includes the first condenser 42, the first coolant cycling mechanism 43, heat exchanger 44, second and condensed
Device 45 and vavuum pump 46.First coolant cycling mechanism 43 connects the condenser of outlet at bottom 422 and first of the first condenser 42
42 coolant inlet 423, to be passed through coolant into the first condenser 42；Be interval with heat exchanger 44 steam inlet 442,
Steam (vapor) outlet 443, coolant inlet 445 and cooling liquid outlet 446.Steam inlet 452 is interval with second condenser 45, it is cold
But liquid entrance (not indicating) and non-condensable gas export 454.Steam inlet 442 on heat exchanger 44 is secondary with last evaporator 2
Steam (vapor) outlet 23 is connected, and the steam (vapor) outlet 443 of heat exchanger 44 is communicated with two branched pipes 5, and two branched pipes 5 are cold with second respectively
The steam inlet 425 of the condenser 42 of steam inlet 452 and first of condenser 45 is connected.Coolant inlet 445 on heat exchanger 44
To be passed through coolant into heat exchanger 44, to cool to entering the indirect steam in heat exchanger 44；On heat exchanger 44
Cooling liquid outlet 446 is to discharge the coolant after heat exchange；In the present embodiment, it is electricity to be passed through the coolant in heat exchanger 44
Factory carrys out demineralized water.The coolant inlet of second condenser 45 is used to be passed through coolant into the second condenser 45, with to entering the
The steam of two condensers 45 is condensed；The fixed gas of the condenser 45 of non-condensable gas export 424 and second of first condenser 42
Body outlet 454 is connected with vavuum pump 46, to discharge on-condensible gas.
In the present embodiment, the non-condensable gas export 424 of the first condenser 42 is located at the top of the first condenser 42.The
The steam inlet 425 of one condenser 42 and coolant inlet 423 are respectively positioned on the side wall of the first condenser 42, and the first condenser
The 42 place horizontal plane of steam inlet 425 is less than the place horizontal plane of coolant inlet 423 of the first condenser 42.Second condenser
45 non-condensable gas export 454 is located at the top of the second condenser 45.The steam inlet 452 of second condenser 45 and coolant enter
Mouth is respectively positioned on the side wall of the second condenser 45, and the place horizontal plane of steam inlet 452 of the second condenser 45 is cold less than second
Horizontal plane where the coolant inlet of condenser 45.
In the present embodiment, heat exchanger 44 is tubular heat exchanger.First coolant cycling mechanism 43 specifically includes
The bottom of one water sealed tank 432, cooling tower 434, circulating water pool 435 and water pump 436, the first water sealed tank 432 and the first condenser 42
Outlet 422 is connected, and the water inlet of water pump 436 is passed sequentially through after circulating water pool 435 and cooling tower 434 to be connected with the first water sealed tank 432
Connect, the delivery port of water pump 436 is connected with the coolant inlet 423 of the first condenser 42.In the present embodiment, heat exchanger 44 has
There is a condensation-water drain (not indicating), condensation-water drain is connected by a pipeline 6 with the first water sealed tank 432, so that by heat exchanger
The condensed water produced in 44 operations is exported to the first water sealed tank 432 and reused, and increase cooling liquid measure simultaneously saves water money
Source.
In the present embodiment, the coolant inlet of the second condenser 45 includes spaced first coolant inlet
4532 and second coolant inlet 4534.Wherein, it is passed through the cooling in the second condenser 45 via the first coolant inlet 4532
Liquid is that pipe network carrys out water coolant, and the first coolant inlet 4532 of the second condenser 45 connects a delivery pipe 7, and delivery pipe 7 is remote
The end of second condenser 45 is used to connect with a pipe network.Vacuum plant 4 also includes the second coolant cycling mechanism 8.Second is cold
But liquid cycling mechanism 8 includes the second water sealed tank 82, circulating pump 84, connecting tube 86 and circulation pipe 88.Second water sealed tank 82 and second
Outlet at bottom (the not indicating) connection of condenser 45, the second water sealed tank 82 is connected by connecting tube 86 with circulating pump 84, circulating pump
84 connect the second coolant inlet 4534 by circulation pipe 88, with cold to entering second using the coolant in the second water sealed tank 82
The steam of condenser 45 is condensed.In the present embodiment, the water valve of the control break-make of connecting tube 86 is additionally provided with connecting tube 86
862。
In the present embodiment, pipe network carrys out water coolant and comes sewage and pipe network to produce water including pipe network.Delivery pipe 7 is remote
One end branch of second condenser 45 forms two communicating pipe 72, is connected with pipe network two communicating pipe 72, one of connection
Pipe 72 carrys out sewage for transmission pipeline network, another communicating pipe 72 is used to transmission pipeline network produce water, two communicating pipe 72 is equipped with control
Make the pipeline valve 74 of the corresponding break-make of communicating pipe 72.
In the present embodiment, vacuum plant 4 also includes return pipe 9, and one end of return pipe 9 is connected with circulation pipe 88, returns
The other end of water pipe 9 is used to be connected with pipe network, and the coolant in the second water sealed tank 82 is returned into pipe network, and return pipe 9 is provided with
Control the on-off valve 92 of the break-make of return pipe 9.
The present invention also provides a kind of method for improving the vacuum of falling film evaporation system 100, comprises the following steps：
(1) above-mentioned vacuum plant 4 is provided；
(2) coolant is passed through into heat exchanger 44 by the coolant inlet 445 of heat exchanger 44, using in heat exchanger 44
Coolant cools to the indirect steam discharged from last evaporator 2；Vapor portion after cooling is passed through the first condenser 42,
Remainder is passed through the second condenser 45；Coolant after heat exchange is discharged from the cooling liquid outlet 446 on heat exchanger 44；In this reality
Apply in mode, after being cooled using the coolant in heat exchanger 44 to the indirect steam discharged from last evaporator 2, also perform
Following steps：The condensed water formed in heat exchanger 44 is passed through into the interior circulation of the first water sealed tank 432 by pipeline 6 to utilize.
(3) coolant is passed through in the first condenser 42 using the first coolant cycling mechanism 43, with cold to being passed through first
The steam of condenser 42 is condensed, and is specially：Cooled down using the liquid in 434 pair of first water sealed tank 432 of cooling tower with shape
Into coolant；The coolant in cooling tower 434 is stored using circulating water pool 435；By water pump 436 by circulating water pool
Coolant in 435 is passed through in the first condenser 42.
Coolant is passed through into the second condenser 45 by the coolant inlet of the second condenser 45, with cold to being passed through second
The steam of condenser 45 is condensed, so that system formation vacuum.In the present embodiment, via the first coolant inlet 4532 to
Pipe network water coolant is passed through in second condenser 45, is specially：Using one of them communicating pipe 72 into the second condenser 45
Transmission pipeline network carrys out sewage, when pipe network, which carrys out sewage, can not meet the coolant of the second condenser 45, utilizes another communicating pipe
72 into the second condenser 45 transmission pipeline network produce water.
In the present embodiment, the circulation from the outlet at bottom discharge of the second condenser 45 is collected using the second water sealed tank 82
Lower water, the second condenser is passed through using circulating pump 84 by water under the circulation in the second water sealed tank 82 from the second coolant inlet 4534
In 45, to be condensed to the steam for entering the second condenser 45.It is also sharp after water reaches preset value in the second water sealed tank 82
The coolant in second water sealed tank 82 is returned into pipe network with return pipe 9.
(4) on-condensible gas in first condenser 42 and the second condenser 45 is discharged by vavuum pump 46.
The falling film evaporation system 100 and its vacuum plant 4 of the present invention, enters the first condenser 42 in end effect secondary steam
Before, increase a heat exchanger 44, demineralized water and the indirect steam come using power plant carries out indirect heat exchange, the temperature of reduction indirect steam
Degree, the condensed water that heat exchanger 44 is produced is introduced in the first water sealed tank 432.The indirect steam temperature that end effect steamer 2 is produced is 51-
54 DEG C, the desalination coolant-temperature gage that power plant comes is 20 DEG C, flow is 80m3/ h, the two is after heat exchange, and indirect steam temperature drop is extremely
49 DEG C, power plant's desalination coolant-temperature gage be increased to 50 DEG C.
Indirect steam is separated into two-way and condensed after demineralized water heat exchange cooling.Into the two of the first condenser 42
Not only temperature is reduced secondary steam, while quantity of steam is also reduced, keeping, the cooling water inflow of the first coolant cycling mechanism 43 is constant
In the case of, the lower coolant-temperature gage of circulation before transformation than reducing 3.62 DEG C (being reduced to 43.95 DEG C by 47.54 DEG C), by cooling tower
After 434 coolings, cooling water temperature before transformation than reducing 2.56 DEG C, (being reduced to 34.79 DEG C by 37.38 DEG C), reaches that reduction is cold
But the purpose of coolant-temperature gage.Another road indirect steam is condensed into the second condenser 45, using pipe network come sewage and production water
As cooling water source, the purpose of increase cooling water inflow is reached.After transformation, the vacuum of falling film evaporation system 100 is obtained very
Big raising, the low-pressure steam amount reduction 5-6t/h of system consumption, cost-effective 49,000,000 yuan of year.
In addition, sewage, production water that power plant's demineralized water, pipe network come all are that the cold water source of heating is needed in production, before transformation,
These cooling water sources are required to the consumption energy and heated, and these water sources are used for 100 2 steamings of falling film evaporation system by the present invention
The heat exchange of vapour, has reached energy-saving purpose.
It is appreciated that in other embodiments, heat exchanger 44 can be omitted.Now, the steam of the first condenser 42 enters
The steam inlet 452 of the condenser 45 of mouth 425 and second is connected with the indirect steam outlet 23 of last evaporator 2.End effect is evaporated
The indirect steam of device 2 is divided into two-way and condensed respectively in the first condenser 42 and the second condenser 45 so that enter former cold
The quantity of steam of condenser, the i.e. indirect steam of the first condenser 42 is reduced, and is keeping the former cooling of the first coolant cycling mechanism 43
In the case that liquid measure is constant, coolant-temperature gage ratio does not increase by the second condenser 45 under the circulation discharged from the outlet at bottom of the first condenser 42
Preceding decreases, after the cooling of the first coolant cycling mechanism 43 so that be again introduced into the coolant of the first condenser 42
Temperature is not than increasing decreasing before the second condenser 45, so as to improve the vacuum of system so that falling film evaporation system
100 operational efficiency is improved.Meanwhile, it can be also passed through by the coolant inlet of the second condenser 45 into the second condenser 45 cold
But liquid, reaches the purpose of increase cooling liquid measure, further increases the vacuum of system so that the fortune of falling film evaporation system 100
Line efficiency is improved.
Described above is the detailed description for the present invention preferably possible embodiments, but embodiment is not limited to this hair
The equal change or modification change completed under bright patent claim, the technical spirit suggested by all present invention, all should belong to
Cover the scope of the claims in the present invention.
Claims (10)
1. a kind of vacuum plant of falling film evaporation system, the falling film evaporation system includes last evaporator, the vacuum plant
Including the first condenser, the first coolant cycling mechanism and vavuum pump, the first coolant cycling mechanism connection described first
The coolant inlet of the outlet at bottom of condenser and first condenser, to be passed through coolant into first condenser,
The vavuum pump is connected with the non-condensable gas export of first condenser, it is characterised in that：The vacuum plant also includes the
Steam inlet, coolant inlet and non-condensable gas export are interval with two condensers, second condenser, described first is cold
The steam inlet of condenser and the steam inlet of second condenser are used to the indirect steam outlet with the last evaporator
Connection, the coolant inlet of second condenser is used to be passed through coolant into second condenser, with described to entering
The steam of second condenser is condensed；The non-condensable gas export of second condenser is connected with the vavuum pump.
2. vacuum plant as claimed in claim 1, it is characterised in that：The first coolant cycling mechanism includes the first water seal
Groove, cooling tower, circulating water pool and water pump, first water sealed tank are connected with the outlet at bottom of first condenser, the water
The water inlet of pump passes sequentially through after the circulating water pool and the cooling tower and to be connected with first water sealed tank, and the water pump goes out
The mouth of a river is connected with the coolant inlet of first condenser.
3. vacuum plant as claimed in claim 2, it is characterised in that：The vacuum plant also includes heat exchanger, the heat exchange
Steam inlet, steam (vapor) outlet, coolant inlet and cooling liquid outlet, the steam inlet of first condenser are interval with device
And steam (vapor) outlet of the steam inlet of second condenser with the heat exchanger is connected, the steam inlet on the heat exchanger
For being connected with the outlet of the indirect steam of the last evaporator, with by the heat exchanger by first condenser, described
Second condenser is connected with the last evaporator, and the coolant inlet on the heat exchanger into the heat exchanger to be passed through
Coolant, to cool to entering the steam in the heat exchanger；Cooling liquid outlet on the heat exchanger is changed to discharge
Coolant after heat.
4. vacuum plant as claimed in claim 3, it is characterised in that：The heat exchanger has a condensation-water drain, described cold
Solidifying water out is connected by a pipeline with first water sealed tank.
5. vacuum plant as claimed in claim 3, it is characterised in that：The coolant being passed through in the heat exchanger is power plant to remove
Salt solution.
6. vacuum plant as claimed in claim 1, it is characterised in that：The coolant inlet of second condenser includes first
Coolant inlet, the coolant being passed through via first coolant inlet in second condenser is that pipe network carrys out water cooling
Liquid, the first coolant inlet of second condenser connects a delivery pipe, and the delivery pipe is away from second condenser
End is used to connect with a pipe network.
7. vacuum plant as claimed in claim 6, it is characterised in that：The pipe network come water coolant including pipe network come sewage and
Pipe network produces water, and one end branch of the delivery pipe away from second condenser form two communicating pipes, two communicating pipes
It is used to be connected with the pipe network, one of them communicating pipe carrys out sewage for transmission pipeline network, another communicating pipe is used for transmission pipeline network
To produce water, the pipeline valve for controlling corresponding communicating pipe break-make is equipped with two communicating pipes.
8. vacuum plant as claimed in claim 6, it is characterised in that：The coolant inlet of second condenser includes and institute
Spaced second coolant inlet of the first coolant inlet is stated, the vacuum plant also includes the second coolant circulator
Structure, the second coolant cycling mechanism includes the second water sealed tank, circulating pump, connecting tube and circulation pipe, second water sealed tank
Connected with the outlet at bottom of second condenser, second water sealed tank is connected by the connecting tube with the circulating pump,
The circulating pump connects second coolant inlet by the circulation pipe, to utilize the coolant in second water sealed tank
The steam for entering second condenser is condensed.
9. vacuum plant as claimed in claim 8, it is characterised in that：The vacuum plant also includes return pipe, the backwater
One end of pipe is connected with the circulation pipe, and the other end of the return pipe is used to be connected with the pipe network, by second water
Coolant in sealing groove returns to the pipe network, and the return pipe is provided with the on-off valve for controlling the return pipe break-make.
10. a kind of falling film evaporation system, including last evaporator and vacuum plant, the vacuum plant include the first condenser,
First coolant cycling mechanism and vavuum pump, the first coolant cycling mechanism connect the outlet at bottom of first condenser
With the coolant inlet of first condenser, to be passed through coolant into first condenser, the vavuum pump with it is described
The non-condensable gas export connection of first condenser, it is characterised in that：The vacuum plant also includes the second condenser, described second
Be interval with steam inlet, coolant inlet and non-condensable gas export on condenser, the steam inlet of first condenser and
The steam inlet of second condenser is connected with the indirect steam outlet of the last evaporator, second condenser
Coolant inlet is used to be passed through coolant into second condenser, cold to be carried out to the steam for entering second condenser
It is solidifying；The non-condensable gas export of second condenser is connected with the vavuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710363762.1A CN107137945A (en) | 2017-05-22 | 2017-05-22 | Falling film evaporation system and its vacuum plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710363762.1A CN107137945A (en) | 2017-05-22 | 2017-05-22 | Falling film evaporation system and its vacuum plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107137945A true CN107137945A (en) | 2017-09-08 |
Family
ID=59777645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710363762.1A Withdrawn CN107137945A (en) | 2017-05-22 | 2017-05-22 | Falling film evaporation system and its vacuum plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107137945A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107715492A (en) * | 2017-11-13 | 2018-02-23 | 广西华银铝业有限公司 | Evaporator group incoagulable gas collects injection energy-saving device |
| CN113476872A (en) * | 2021-06-17 | 2021-10-08 | 中国恩菲工程技术有限公司 | Evaporation device and multi-effect evaporation system |
| CN114470821A (en) * | 2021-12-27 | 2022-05-13 | 茌平信发华宇氧化铝有限公司 | Method for recycling evaporated condensate water |
-
2017
- 2017-05-22 CN CN201710363762.1A patent/CN107137945A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107715492A (en) * | 2017-11-13 | 2018-02-23 | 广西华银铝业有限公司 | Evaporator group incoagulable gas collects injection energy-saving device |
| CN113476872A (en) * | 2021-06-17 | 2021-10-08 | 中国恩菲工程技术有限公司 | Evaporation device and multi-effect evaporation system |
| CN114470821A (en) * | 2021-12-27 | 2022-05-13 | 茌平信发华宇氧化铝有限公司 | Method for recycling evaporated condensate water |
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Application publication date: 20170908 |