CN207012583U - Falling film evaporation system and its vacuum plant - Google Patents
Falling film evaporation system and its vacuum plant Download PDFInfo
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- CN207012583U CN207012583U CN201720573105.5U CN201720573105U CN207012583U CN 207012583 U CN207012583 U CN 207012583U CN 201720573105 U CN201720573105 U CN 201720573105U CN 207012583 U CN207012583 U CN 207012583U
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Abstract
The utility model provides a kind of vacuum plant of falling film evaporation system, including the first condenser, the first coolant cycling mechanism, vavuum pump and heat exchanger.Steam inlet on heat exchanger, which is used to export with the indirect steam of a last evaporator, to be connected, the steam (vapor) outlet of heat exchanger is connected with the steam inlet of the first condenser, coolant inlet on heat exchanger is to be passed through coolant into heat exchanger, to cool to entering the steam in heat exchanger；Cooling liquid outlet on heat exchanger is discharging the coolant after heat exchange.The non-condensable gas export of first condenser is connected with vavuum pump.The utility model 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】
It the utility model is related 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, and in aluminum oxide production process, mother liquor evaporation processes are more using six effects
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 reduces evaporation
The steam consumption of device is to reduce alumina producing total energy consumption, reduce 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, first, the heating steam pressure of first evaporator is improved, second, improving the vacuum of last evaporator.
But the heating steam pressure for improving first evaporator can bring rear a few effect temperature rises, the raising of production capacity and unobvious,
Fouling can be caused to aggravate on the contrary, the cycle of operation shortens, increases the problems such as equipment corrosion.Therefore, it is increase system to improve vacuum
The first choice of total temperature difference.
The factor for influenceing 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 form 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
Caused indirect steam is directly contacted in the condenser 210 with cooling water and is condensed rapidly, makes system formation vacuum, fixed gas by
Vavuum pump 250 is drained.Indirect steam caused by last evaporator 200 enters from the bottom of condenser 210, cold with being added from top
But water is directly contacted, and indirect steam is constantly condensed, and system is formed vacuum, and condensate liquid is used as under circulation together with water with cooling water
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 reduce, meanwhile, the ability of water circulating pump 260 also determines that the quantity delivered of cooling water inflow is certain.Cooled down to reduce
Water temperature, people's generally use increase coolant cycling mechanism method, the i.e. more set cooling towers 250 of increase carry out radiating and cooling.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 can all cause the increase of investment and the rising of cost.
【Utility model content】
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, technical scheme is used by the utility model：
A kind of vacuum plant of falling film evaporation system, the falling film evaporation system include 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 are connected with the non-condensable gas export of first condenser.The vacuum plant also includes heat exchanger, described
It is interval with steam inlet, steam (vapor) outlet, coolant inlet and cooling liquid outlet on heat exchanger, the steam on the heat exchanger enters
Mouth is used for and the indirect steam of the last evaporator is exported and connected, the steam (vapor) outlet of the heat exchanger and first condenser
Steam inlet connection, the coolant inlet on the heat exchanger into the heat exchanger to be passed through coolant, with to entering
Steam in the heat exchanger is cooled；Cooling liquid outlet on the heat exchanger is discharging the coolant after heat exchange.
Further, the first coolant cycling mechanism includes the first water sealed tank, cooling tower, circulating water pool and water pump,
First water sealed tank connects 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 connects.
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 connects.
Further, the vacuum plant also includes the second condenser, and being interval with steam on second condenser enters
Mouth, coolant inlet and non-condensable gas export, the steam (vapor) outlet of the heat exchanger are communicated with two branched pipes, described two branches
Pipe is connected with the steam inlet of first condenser and the steam inlet of second condenser respectively；Second condenser
Coolant inlet be used for be passed through coolant into second condenser, with to enter second condenser steam carry out
Condensation；The non-condensable gas export of second condenser is connected with the vavuum pump.
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 including pipe network comes sewage and 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, was used for transmission pipeline network another communicating pipe to 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 include 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
The other end for stating 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.
Further, the coolant being passed through in the heat exchanger is that power plant carrys out demineralized water.
The utility model also provides a kind of falling film evaporation system, including last evaporator and vacuum plant, 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 are connected with the non-condensable gas export of first condenser.The vacuum plant also includes heat exchanger, described
Steam inlet, steam (vapor) outlet, coolant inlet and cooling liquid outlet, the steam inlet and the end are interval with heat exchanger
The indirect steam outlet connection of evaporator is imitated, the steam inlet of the steam (vapor) outlet of the heat exchanger and first condenser connects
Connect, the coolant inlet on the heat exchanger into the heat exchanger to be passed through coolant, with to entering in the heat exchanger
Steam cooled；Cooling liquid outlet on the heat exchanger is discharging the coolant after heat exchange.
Due to being had the advantages that using above-mentioned technical proposal, the utility model：
1st, falling film evaporation system and its vacuum plant of the present utility model, the secondary steaming of heat exchanger and last evaporator is utilized
Vapour is exchanged heat, and reduces the temperature of indirect steam so that enters former condenser, i.e. the indirect steam temperature of the first condenser drops
It is low, in the case where keeping the former cooling liquid measure of the first coolant cycling mechanism constant, from the discharge of the first condenser outlet at bottom
The lower coolant-temperature gage of circulation is than decreasing before not increasing heat exchanger, after the cooling of the first coolant cycling mechanism so that again
Into the first condenser coolant temperature than the reduction before not increasing heat exchanger, improve the vacuum of system so that falling liquid film
The operational efficiency of vapo(u)rization system improves.
2nd, falling film evaporation system and its vacuum plant of the present utility model, the steam after heat exchanger cools are divided into two-way
Condensed respectively in the first condenser and the second condenser so that enter former condenser, the i.e. secondary steaming of the first condenser
Not only temperature reduces the steam of vapour, and measures and reduce, and is keeping the constant feelings of the former cooling liquid measure of the first coolant cycling mechanism
Under condition, from coolant-temperature gage under the circulation of the first condenser outlet at bottom discharge than decreasing before not increasing by the second condenser, warp
After crossing the cooling of the first coolant cycling mechanism so that being again introduced into the coolant temperature ratio of the first condenser does not increase by the second condensation
Decreasing before device, so as to improve the vacuum of system so that the operational efficiency of falling film evaporation system improves.Meanwhile also
Coolant can be passed through into the second condenser by the coolant inlet of the second condenser, reach the purpose of increase cooling liquid measure,
Further increase the vacuum of system and the operational efficiency of falling film evaporation system.
3rd, falling film evaporation system and its vacuum plant of the present utility model, the second condenser are used as cooling by the use of pipe network water
Liquid, for the coolant of heat exchanger using power plant come demineralized water, power plant's demineralized water, pipe network water are all the cold water for needing to heat in production
Source, in the prior art, these cooling water sources are required to the consumption energy and heated, and these water sources are used for falling liquid film by the utility model
The heat exchange of vapo(u)rization system indirect steam, energy-saving purpose is reached.
【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 the better embodiment of the utility model one.
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 utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
It should be noted that when component is referred to as " being fixed on " another component, it can be directly on another component
Or there may also be 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
", " horizontal ", "left", "right" and similar statement for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to technology of the present utility model
The implication that the technical staff in domain is generally understood that is identical.It is simply in term used in the description of the present utility model herein
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein " and/or " include
The arbitrary and all combination of one or more related Listed Items.
Fig. 2 is referred to, the better embodiment of the utility model one provides a kind of falling film evaporation system 100, including end effect is steamed
Send out device 2 and vacuum plant 4.Vacuum plant 4 includes the first condenser 42, the first coolant cycling mechanism 43, heat exchanger 44, second
Condenser 45 and vavuum pump 46.The outlet at bottom 422 and first that first coolant cycling mechanism 43 connects the first condenser 42 is cold
The coolant inlet 423 of condenser 42, to be passed through coolant into the first condenser 42；Steam inlet is interval with heat exchanger 44
442nd, steam (vapor) outlet 443, coolant inlet 445 and cooling liquid outlet 446.Steam inlet is interval with second condenser 45
452nd, coolant inlet (not indicating) and non-condensable gas export 454.Steam inlet 442 and last evaporator 2 on heat exchanger 44
The connection of indirect steam outlet 23, the steam (vapor) outlet 443 of heat exchanger 44 is communicated with two branched pipes 5, two branched pipes 5 respectively with
The steam inlet 425 of the condenser 42 of steam inlet 452 and first of second condenser 45 connects.Coolant on heat exchanger 44 enters
Mouth 445 into heat exchanger 44 to be passed through coolant, to cool to entering the indirect steam in heat exchanger 44；Heat exchanger 44
On cooling liquid outlet 446 to discharge heat exchange after coolant；In the present embodiment, the coolant being passed through in heat exchanger 44
Carry out demineralized water for power plant.The coolant inlet of second condenser 45 is used to be passed through coolant into the second condenser 45, with to entering
The steam for entering the second condenser 45 is condensed；The condenser 45 of non-condensable gas export 424 and second of first condenser 42 is not
Solidifying gas vent 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 in 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 in 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
The connection of outlet 422, the water inlet of water pump 436 connect after passing sequentially through circulating water pool 435 and cooling tower 434 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 as to by heat exchanger
Caused condensed water exports to recycling in the first water sealed tank 432, increase cooling liquid measure and simultaneously saves water money in 44 operations
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 are 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 including pipe network to produce water.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 for transmission pipeline network to 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, the coolant in the second water sealed tank 82 is returned into pipe network, return pipe 9 is provided with
Control the on-off valve 92 of the break-make of return pipe 9.
The utility model 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 in the first water sealed tank 432 by pipeline 6 and recycled.
(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：The liquid in first water sealed tank 432 is cooled down with shape using cooling tower 434
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 forms 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, water under the circulation in second water sealed tank 82 is passed through the second condenser from the second coolant inlet 4534 using circulating pump 84
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.
Falling film evaporation system 100 and its vacuum plant 4 of the present utility model, enter the first condenser in end effect secondary steam
Before 42, increase a heat exchanger 44, demineralized water and indirect steam the progress indirect heat exchange come using power plant, reduce indirect steam
Temperature, condensed water caused by heat exchanger 44 are introduced in the first water sealed tank 432.Indirect steam temperature is caused by end effect steamer 2
51-54 DEG C, the desalination coolant-temperature gage that power plant comes is 20 DEG C, flow 80m3/ h, after heat exchange, indirect steam temperature declines for the two
50 DEG C are increased to 49 DEG C, power plant's desalination coolant-temperature gage.
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, and keeping, the cooling water inflow of the first coolant cycling mechanism 43 is constant
In the case of, lower coolant-temperature gage is circulated than reducing 3.62 DEG C (being reduced to 43.95 DEG C by 47.54 DEG C) before transformation, by cooling tower
After 434 coolings, cooling water temperature (being reduced to 34.79 DEG C by 37.38 DEG C), it is cold to reach reduction than reducing 2.56 DEG C before transformation
But the purpose of coolant-temperature gage.Another way indirect steam is condensed into the second condenser 45, using pipe network come sewage and production water
As cooling water source, reach the purpose for increasing cooling water inflow.After transformation, the vacuum of falling film evaporation system 100 obtains very
Big raising, the low-pressure steam amount of system consumption reduce 5-6t/h, cost-effective 49,000,000 yuan of year.
In addition, sewage, production water that power plant's demineralized water, pipe network come all are the cold water sources for needing to heat in production, before transformation,
These cooling water sources are required to the consumption energy and heated, and these water sources are used for falling film evaporation system 100 2 by the utility model
The heat exchange of secondary steam, energy-saving purpose is reached.
It is appreciated that in other embodiments, the second condenser 45 can omit.Evaporated using heat exchanger 44 and end effect
The indirect steam of 2 devices is exchanged heat, and reduces the temperature of indirect steam so that enter former condenser, i.e. the first condenser 42
Indirect steam temperature reduces, in the case where keeping former cooling liquid measure constant, from following for the outlet at bottom of the first condenser 42 discharge
Coolant-temperature gage is than decreasing before not increasing heat exchanger 44 under ring, after the cooling of the first coolant cycling mechanism 43 so that again
The secondary coolant temperature for entering the first condenser 42 improves the vacuum of system, made than the reduction before not increasing heat exchanger 44
The operational efficiency for obtaining falling film evaporation system 100 improves.
Described above is the detailed description for the preferable possible embodiments of the utility model, but embodiment is not limited to
Patent claim of the present utility model, the equal change or modification completed under the technical spirit suggested by all the utility model
Change, all should belong to the utility model and cover the scope of the claims.
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 changing
Hot device, steam inlet, steam (vapor) outlet, coolant inlet and cooling liquid outlet, the heat exchanger are interval with the heat exchanger
On steam inlet be used to export with the indirect steam of the last evaporator and connect, the steam (vapor) outlet of the heat exchanger with it is described
The steam inlet connection of first condenser, coolant inlet on the heat exchanger is being passed through cooling into the heat exchanger
Liquid, to cool to entering the steam in the heat exchanger；After cooling liquid outlet on the heat exchanger is to discharge heat exchange
Coolant.
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 connect with the outlet at bottom of first condenser, the water
The water inlet of pump is connected after passing sequentially through the circulating water pool and the cooling tower 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 heat exchanger has a condensation-water drain, described cold
Condensate outlet is connected by a pipeline with first water sealed tank.
4. vacuum plant as claimed in claim 1, it is characterised in that：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 (vapor) outlet of the heat exchanger connects
Be connected with two branched pipes, described two branched pipes respectively with the steam inlet of first condenser and second condenser
Steam inlet connects；The coolant inlet of second condenser is used to be passed through coolant into second condenser, with right
Steam into second condenser is condensed；The non-condensable gas export of second condenser connects with the vavuum pump
Connect.
5. vacuum plant as claimed in claim 4, 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 are that pipe network carrys out water cooling
Liquid, the first coolant inlet of second condenser connect a delivery pipe, and the delivery pipe is away from second condenser
End is used to connect with a pipe network.
6. vacuum plant as claimed in claim 5, 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.
7. vacuum plant as claimed in claim 5, 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 include the second water sealed tank, circulating pump, connecting tube and circulation pipe, second water sealed tank
Being 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.
8. vacuum plant as claimed in claim 7, 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.
9. vacuum plant as claimed in claim 1, it is characterised in that：The coolant being passed through in the heat exchanger is power plant to remove
Salt solution.
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
And 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 heat exchanger, on the heat exchanger
It is interval with steam inlet, steam (vapor) outlet, coolant inlet and cooling liquid outlet, the steam inlet and the last evaporator
Indirect steam outlet connection, the steam (vapor) outlet of the heat exchanger is connected with the steam inlet of first condenser, described to change
Coolant inlet on hot device into the heat exchanger to be passed through coolant, to be carried out to the steam entered in the heat exchanger
Cooling；Cooling liquid outlet on the heat exchanger is discharging the coolant after heat exchange.
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| CN201720573105.5U CN207012583U (en) | 2017-05-22 | 2017-05-22 | Falling film evaporation system and its vacuum plant |
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| CN201720573105.5U CN207012583U (en) | 2017-05-22 | 2017-05-22 | Falling film evaporation system and its vacuum plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112843754A (en) * | 2020-12-25 | 2021-05-28 | 鞍钢化学科技有限公司 | System and method for continuously vacuumizing evaporation kettle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112843754A (en) * | 2020-12-25 | 2021-05-28 | 鞍钢化学科技有限公司 | System and method for continuously vacuumizing evaporation kettle |
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