CN106277115A - A kind of saline sewage crystallizing evaporator, cleaning system and purification technique - Google Patents
A kind of saline sewage crystallizing evaporator, cleaning system and purification technique Download PDFInfo
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- CN106277115A CN106277115A CN201510355385.8A CN201510355385A CN106277115A CN 106277115 A CN106277115 A CN 106277115A CN 201510355385 A CN201510355385 A CN 201510355385A CN 106277115 A CN106277115 A CN 106277115A
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Abstract
The invention discloses a kind of saline sewage crystallizing evaporator, cleaning system and purify technique, belonging to petroleum chemical industry technical field of sewage.Crystallizing evaporator includes: evaporation and heat-exchange parts (D12), gas-liquid separate component (D11) and discharge of materials parts (D13)；Wherein, described evaporation and heat-exchange parts (D12) include shell (D10), central canal (D2), heat exchanger tube (D3), steam inlet (D7) and condense water out (D8)；Described central canal (D2) is used for carrying saline sewage；Described heat exchanger tube (D3), for the solvent of concentrating salt-containing sewage, makes salt-pepper noise separate out；The internal diameter of described central canal (D2) is more than the internal diameter of described heat exchanger tube (D3)；Above-mentioned crystallizing evaporator is also applied in saline sewage evaporative crystallization cleaning system by the present invention, and the technological parameter running this cleaning system is optimized.This cleaning system and purification technique ensure that the clean-up effect of saline sewage on the basis of reducing cleaning system floor space, reducing energy consumption.
Description
Technical field
The present invention relates to petroleum chemical industry technical field of sewage, particularly to a kind of saline sewage evaporation
Crystallizer, cleaning system and purification technique.
Background technology
Petroleum chemical industry can produce the sewage that salinity is higher in process of production.For this kind of salinity relatively
High sewage typically uses the method for evaporative crystallization to purify it.
The most conventional evaporative crystallization technique mainly includes calm the anger evaporative crystallization technique and continuous evaporative crystallization work
Skill.Wherein, evaporative crystallization technique of calming the anger is: in evaporation and crystal process, sewage initially enters heat exchanger,
Then entering vaporizer through circulating pump to be evaporated, the gas-liquid mixture after evaporation enters gas-liquid separator, point
After compressor, vaporizer is entered as thermal source for evaporating, the liquid of isolated from the indirect steam obtained
After circulating pump, send vaporizer back to proceed evaporation；Continuous evaporative crystallization system mainly includes multiple-effect evaporation group
And the equipment such as circulating pump, each effect evaporation group includes again the equipment such as vaporizer, heat exchanger, crystallization lower limb.
Wherein, vaporizer, for evaporating the solvent of sewage, improves the concentration of sewage；Heat exchanger is used for entering sewage
Row heating；Crystallization lower limb is used for collecting the crystal of precipitation.Sewage sequentially passes through each effect evaporation group and carries out solvent evaporation,
The concentration of sewage improves constantly, and after reaching supersaturation, salt is crystallization from solution.
During realizing the present invention, the inventors discovered that in prior art and at least there is problems in that now
Some saline sewage evaporative crystallizations purify in technique, and occupation area of equipment is big, energy consumption is higher.
Summary of the invention
In order to solve above-mentioned technical problem, the present invention provides the saliferous that a kind of floor space is little, energy consumption is relatively low
Sewage evaporation crystallizer, cleaning system and purification technique.
Specifically, including following technical scheme:
First aspect present invention provides a kind of saline sewage crystallizing evaporator: described crystallizing evaporator includes:
Evaporation and heat-exchange parts, for evaporating the solvent in described saline sewage, make salt-pepper noise separate out；Gas-liquid is divided
From parts, the gas in the steam evaporation of described evaporation and heat-exchange parts obtained separates with liquid；And
Discharge of materials parts, for exporting the saline sewage after evaporation and gained crystal from described crystallizing evaporator；
Described gas-liquid separate component connects with the top of described evaporation and heat-exchange parts；Described discharge of materials parts with
The bottom connection of described evaporation and heat-exchange parts；
Wherein,
Described evaporation and heat-exchange parts include: shell, central canal, heat exchanger tube, steam inlet and condensation water go out
Mouthful；Described central canal is used for carrying saline sewage；Described heat exchanger tube, for the solvent of concentrating salt-containing sewage, makes
Salt-pepper noise separates out；Described central canal and heat exchanger tube are positioned at described enclosure, and described central canal changes with described
Heat pipe is parallel, the two ends of described central canal and described heat exchanger tube respectively with described gas-liquid separate component with described
Discharge of materials members；Described steam inlet is positioned at described shell upper, and described condensation water out is positioned at institute
State outer casing underpart；The internal diameter of described central canal with the relation of the internal diameter of described heat exchanger tube is: n0.5d2≤d1≤2n0.5d2,
Wherein, d1For the internal diameter of described central canal, d2For the internal diameter of described heat exchanger tube, n is the quantity of described heat exchanger tube；
Described gas-liquid separate component includes that gas-liquid separator, material inlet and steam (vapor) outlet, described steam go out
Mouth is positioned at above described gas-liquid separator, and described material inlet is positioned at below described gas-liquid separator；
Described discharge of materials parts include hopper and material outlet.
Preferably, the quantity of described central canal is 1, and the quantity of described heat exchanger tube is 50～300.
Preferably, the height of described gas-liquid separator is 150～300mm.
Preferably, described hopper be shaped as taper.
Second aspect present invention provides a kind of crystallizing evaporator utilizing first aspect present invention to enter saline sewage
The cleaning system that row evaporative crystallization purifies, described cleaning system includes:
Saline sewage intake pipeline, described saline sewage intake pipeline for being delivered to described steaming by saline sewage
Send out purging by crystallization system；First effect crystallizing evaporator, described first effect crystallizing evaporator is first aspect present invention
Crystallizing evaporator, first effect crystallizing evaporator material inlet connects with described saline sewage intake pipeline；End effect is steamed
Sending out crystallizer, described end effect crystallizing evaporator is the crystallizing evaporator of first aspect present invention, end effect evaporation knot
Brilliant device material inlet connects with first effect crystallizing evaporator material outlet, and end effect crystallizing evaporator steam (vapor) outlet is with first
The connection of effect crystallizing evaporator steam inlet；Heat source intake pipeline, described heat source intake pipeline and end
The connection of effect crystallizing evaporator steam inlet；And vacuum pump, described vacuum pump and first effect crystallizing evaporator steam
Outlet, for described evaporative crystallization cleaning system evacuation.
Further, described evaporative crystallization cleaning system also includes: middle effect crystallizing evaporator, described centre
Effect crystallizing evaporator is between described first effect crystallizing evaporator and end effect crystallizing evaporator, and described middle effect is steamed
Sending out crystallizer is the crystallizing evaporator of first aspect present invention, and middle effect crystallizing evaporator material inlet is with described
First effect crystallizing evaporator material outlet connection, middle effect crystallizing evaporator steam (vapor) outlet and described first effect evaporation knot
The connection of brilliant device steam inlet；Middle effect crystallizing evaporator material outlet enters with described end effect crystallizing evaporator material
Mouth connection, middle effect crystallizing evaporator steam inlet connects with described end effect crystallizing evaporator steam (vapor) outlet.
Preferably, the quantity of described middle single-effect evaporator is 1～4.
Further, described evaporative crystallization cleaning system also includes: Rose Box, and described Rose Box steams with end effect
Send out the connection of crystallizer material outlet；Saline slot, described saline slot connects with described Rose Box；First water pump
One pump intake connects with described saline slot, the first pump outlet and described end effect crystallizing evaporator material
Entrance connects.
Further, described evaporative crystallization cleaning system also includes: steam condenser and vacuum tank, described
Steam condenser and vacuum tank are positioned on the pipeline that first effect crystallizing evaporator steam (vapor) outlet connects with vacuum pump,
Steam condenser inlet connects with described first effect crystallizing evaporator steam (vapor) outlet, steam condensator outlet and vacuum
Tank entrance connects, and vacuum tank the second outlet connects with described vacuum pump.
Further, described evaporative crystallization cleaning system also includes: water pot, described water pot include clear water zone and
Contraminated zone, described clear water zone and first effect crystallizing evaporator condense water out and middle effect crystallizing evaporator condenses
Water out connects；Described contraminated zone and vacuum tank the first outlet.
Further, described evaporative crystallization cleaning system also includes: first condenses water delivery pipe line, described the
One condenses water delivery pipe line connects with end effect crystallizing evaporator condensation water out.
Preferably, described first condensation water delivery pipe line intersects with described saline sewage intake pipeline, described
Intersection is provided with preheater.
Further, described saline sewage intake pipeline is additionally provided with surge tank and feed pump.
Further, described evaporative crystallization cleaning system also includes: second condenses water delivery pipe line, described the
Two condense water delivery pipe line connects with the contraminated zone of described water pot；And the 3rd condense water delivery pipe line, described
3rd condenses water delivery pipe line connects with the clear water zone of described water pot.
Third aspect present invention provides the saline sewage evaporative crystallization of a kind of system utilizing second aspect present invention
Purify technique.Described purification technique is:
Initial saline sewage is delivered to first effect crystallizing evaporator, to initially in described first effect crystallizing evaporator
Saline sewage is evaporated, and obtains the second saline sewage and the 3rd indirect steam；By the second saline sewage conveying
To end effect crystallizing evaporator, in described end effect crystallizing evaporator, described second saline sewage is evaporated,
Obtain the 3rd saline sewage, crystal and the second indirect steam；Described second indirect steam is delivered to first effect
Crystallizing evaporator, carries out heating to described initial saline sewage and makes it evaporate；Heat source is delivered to end effect
Crystallizing evaporator, carries out heating to described second saline sewage and makes it evaporate；Described first effect crystallizing evaporator and
End effect crystallizing evaporator is the crystallizing evaporator of first aspect present invention；
Utilize vacuum pump evacuation, make to be in very inside described first effect crystallizing evaporator and end effect crystallizing evaporator
Dummy status, described end effect crystallizing evaporator internal pressure is more than described first effect crystallizing evaporator internal pressure；Institute
State the temperature temperature more than described first effect crystallizing evaporator of end effect crystallizing evaporator.
Preferably, the temperature of described first effect crystallizing evaporator is 45～50 DEG C, the temperature of described end effect crystallizing evaporator
Degree is 70～75 DEG C, and the temperature of described heat source is 85～95 DEG C；Described first effect crystallizing evaporator internal pressure
Being 9.5～10KPa, described end effect crystallizing evaporator internal pressure is 36～36.5KPa.
Further, described purification technique also includes: described second saline sewage is delivered to middle effect evaporation
Crystallizer, utilizes described second indirect steam to carry out heating evaporation in described middle single-effect evaporator, and gained contains
Salt sewage transport is to described end effect crystallizing evaporator, and gained indirect steam is delivered to first effect crystallizing evaporator；Institute
Stating middle effect crystallizing evaporator is the crystallizing evaporator of first aspect present invention；Described first effect crystallizing evaporator,
Middle effect crystallizing evaporator and end effect crystallizing evaporator internal pressure raise successively, described first effect evaporative crystallization
The temperature of device, middle effect crystallizing evaporator and end effect crystallizing evaporator raises successively.
Preferably, the quantity of described middle effect crystallizing evaporator is 1～4.
Further, described purification technique also includes: the 3rd saline sewage obtained by end effect crystallizing evaporator
Being delivered to Rose Box with crystal, after being filtered by crystal, described 3rd saline sewage enters saline slot, then by first
Water pump is transmitted back to end effect crystallizing evaporator, enters together with the second saline sewage in described end effect crystallizing evaporator
Row evaporation.
Further, described purification technique also includes: head is imitated the first condensation water that crystallizing evaporator obtains with
And the water that condenses that centre effect crystallizing evaporator obtains is delivered to the clear water zone of water pot；By described first effect evaporative crystallization
The 3rd indirect steam that device obtains is delivered to steam condenser, condenses, in described steam condenser, the 3rd obtained
Condense water after vacuum tank, be delivered to the contraminated zone of water pot.
Further, described purification technique also includes: utilize the second condensation water that end effect crystallizing evaporator obtains
Initial salt solution is heated.
Further, described purification technique also includes: by the 3rd condensation in the contraminated zone entering water pot
Water is delivered to homogenizing regulating reservoir, by the first condensation water in the clear water zone entering water pot and middle effect evaporative crystallization
The condensation water that device obtains is delivered to clean water tank.
The saline sewage crystallizing evaporator of the present invention, cleaning system and purification technique are not only applicable to oil
The purified treatment of chemical industry saline sewage, additionally it is possible to the field relating to evaporative crystallization for other, such as, change
Work raw material production.
The beneficial effect of the technical scheme that the embodiment of the present invention provides:
1, the crystallizing evaporator that the embodiment of the present invention provides is a kind of to integrate heat exchange, evaporate and crystallize
Novel crystallizing evaporator.When saline sewage enters central canal and flows out from central canal bottom, can be due to hot rainbow
The principle inhaled and be inhaled in heat exchanger tube, evaporate in heat exchanger tube and separate out crystal after a part of solvent.Heat exchange
Pipe evaporates the gas-liquid mixture that obtains enter gas-liquid separate component and carry out gas-liquid separation, the liquid not evaporated,
Separate out crystal and from center pipe flow go out and be not inhaled into heat exchanger tube sewage enter discharge of materials parts.Should
Crystallizing evaporator need not power-equipment, such as compressor, circulating pump etc., can realize saline sewage
Heat exchange, evaporation and crystallization process, energy consumption is relatively low, saves the energy, reduces cost.And this evaporative crystallization
Plant area area is little, save space.
2, above-mentioned crystallizing evaporator is applied in continuous evaporative crystallization system by the embodiment of the present invention, by multiple steamings
Send out crystallizer to be cascaded, saline sewage is purified, cleaning system arranges vacuum pump, to only
Change system evacuation, makes each crystallizing evaporator run under vacuum conditions, it is possible to reduce the boiling of saline sewage
Point, makes saline sewage the most just can evaporate, and reduces energy consumption.
3, the cleaning system of the embodiment of the present invention is additionally provided with for reclaiming the water pot condensing water, can be effective
Solve the Utilizing question after petroleum chemical industry saline sewage purifies, reduce sewage discharge, at protection environment
Meanwhile, saving water resource.Additionally, the cleaning system of embodiment of the present invention offer and purification technique disclosure satisfy that
Continuous feed, the requirement of continuous pulp discharge, operate steadily.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, institute in embodiment being described below
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the crystallizing evaporator of the embodiment of the present invention；
Fig. 2 is the operation principle schematic diagram of the crystallizing evaporator of the embodiment of the present invention；
Fig. 3 is the structural representation of the saline sewage cleaning system of the embodiment of the present invention；
Fig. 4 be the embodiment of the present invention saline sewage cleaning system in the structural representation of first effect crystallizing evaporator；
Fig. 5 be the embodiment of the present invention saline sewage cleaning system in the structural representation of end effect crystallizing evaporator；
Fig. 6 is the process chart of the saline sewage purification technique of the embodiment of the present invention；
Fig. 7 is that to purify single-effect evaporator quantity in the middle of in technique be work when 4 for the saline sewage of the embodiment of the present invention
Process flow schematic diagram.
In figure, reference represents respectively:
D1, gas-liquid separator；D2, central canal；D3, heat exchanger tube；D4, hopper；D5, material outlet；
D6, steam (vapor) outlet；D7, steam inlet；D8, condensation water out；D9, material outlet；D10, shell；
D11, gas-liquid separate component；D12, evaporation and heat-exchange parts；D13, discharge of materials parts；
A1, saline sewage；A2, it is not inhaled into the saline sewage of heat exchanger tube；B1, gas-liquid mixture；B2, not
The liquid evaporated and the crystal of precipitation；Steam after b3, gas-liquid separation；Liquid after b4, gas-liquid separation；
C1, heat source stream；C2, heat source stream cool down the condensation water obtained；
1, surge tank；2, feed pump；3, preheater；
4, first effect crystallizing evaporator；405, first effect crystallizing evaporator material outlet；406, first effect evaporative crystallization
Device steam (vapor) outlet；407, first effect crystallizing evaporator steam inlet；408, first effect crystallizing evaporator condensation water goes out
Mouthful；409, first effect crystallizing evaporator material inlet；
5, end effect crystallizing evaporator；505, end effect crystallizing evaporator material outlet；506, end effect evaporative crystallization
Device steam (vapor) outlet；507, end effect crystallizing evaporator steam inlet；508, end effect crystallizing evaporator condensation water goes out
Mouthful；509, end effect crystallizing evaporator material inlet；
6, steam condenser；
7, vacuum tank；701, vacuum tank entrance；702, vacuum tank first exports；703, vacuum tank second
Outlet；
8, vacuum pump；
9, water pot；901, clear water zone；902, contraminated zone；
10, the second water pump；11, the 3rd water pump；12, Rose Box；13, the first water pump；14, saline slot；
15, the first middle effect crystallizing evaporator；16, the second middle effect crystallizing evaporator；
17, the 3rd middle effect crystallizing evaporator；18, the 4th middle effect crystallizing evaporator.
19, saline sewage intake pipeline；20, heat source intake pipeline；
21, first condenses water delivery pipe line；22, second condenses water delivery pipe line；
23, the 3rd condenses water delivery pipe line；
S1, initial saline sewage；S2, the second saline sewage；S3, the 3rd saline sewage；S4, the 4th contain
Salt sewage；S5, the 5th saline sewage；S6, the 6th saline sewage；S7, the 7th saline sewage；
Q1, heat source；Q2, the second indirect steam；Q3, the 3rd indirect steam；Q4, the four or two steaming
Vapour；Q5, the 5th indirect steam；Q6, the 6th indirect steam；Q7, the 7th indirect steam；
N1, the first condensation water；N2, the second condensation water；N3, the 3rd condensation water；N4, the 4th condensation water；
N5, the 5th condensation water；N6, the 6th condensation water；N7, the 7th condensation water.
The direction of arrow in figure represents the flow direction of gas or liquid.
Detailed description of the invention
For making technical scheme and advantage clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
First aspect present invention provides a kind of saline sewage crystallizing evaporator, and the structure of this crystallizing evaporator is such as
Shown in Fig. 1, this crystallizing evaporator includes:
Evaporation and heat-exchange parts D12, for evaporating the solvent in described saline sewage, makes salt-pepper noise separate out；
Gas-liquid separate component D11, the gas in the steam that described evaporation and heat-exchange parts D12 evaporation is obtained
Body separates with liquid；And
Discharge of materials parts D13, is used for the saline sewage after evaporating and gained crystal from described evaporative crystallization
Device exports；
Described gas-liquid separate component D11 connects with the top of described evaporation and heat-exchange parts D12；Described material is arranged
The bottom putting parts D13 and described evaporation and heat-exchange parts D12 connects；
Wherein,
Described evaporation and heat-exchange parts D12 includes: shell D10, central canal D2, heat exchanger tube D3, steam enter
Mouth D7 and condensation water out D8；
Described central canal D2 is used for carrying saline sewage；Described heat exchanger tube D3 is molten for concentrating salt-containing sewage
Agent, makes salt-pepper noise separate out；Described central canal D2 and heat exchanger tube D3 is positioned at inside described shell D10, institute
State central canal D2 parallel with described heat exchanger tube D3, described central canal D2 and the two ends of described heat exchanger tube D3
Connect with described discharge of materials parts D13 with described gas-liquid separate component D11 respectively；Described steam inlet D7
Being positioned at described shell D10 top, described condensation water out D8 is positioned at described shell D10 bottom；
The internal diameter of described central canal with the relation of the internal diameter of described heat exchanger tube is: n0.5d2≤d1≤2n0.5d2, wherein,
d1For the internal diameter of described central canal, d2For the internal diameter of described heat exchanger tube, n is the quantity of described heat exchanger tube；
Described gas-liquid separate component D11 includes gas-liquid separator D1, material inlet D9 and steam (vapor) outlet D6,
Described steam (vapor) outlet D6 is positioned at above described gas-liquid separator D1, and described material inlet D9 is positioned at described gas
Below liquid/gas separator D1；
Described discharge of materials parts D13 includes hopper D4 and material outlet D5.
Seeing Fig. 2, the operation principle of the crystallizing evaporator that the embodiment of the present invention provides is: transport at crystallizing evaporator
At the initial stage of row, saline sewage a1 enters gas-liquid separate component D11, and then the center of entrance from material inlet D9
In pipe D2 and heat exchanger tube D3, heat source stream c1 enters outside evaporation and heat-exchange parts D12 from steam inlet D7
Shell D10 is interior and transfers heat to the saline sewage a1 in central canal D2 and heat exchanger tube D3, central canal D2
After being heated with the saline solution a1 in heat exchanger D3 evaporation produce gas, but due to central canal D2 internal diameter relatively
Greatly, the amount of the steam produced after being heated is less；And heat exchanger tube D3 internal diameter is less, the quantity of steam produced after being heated
Bigger；Owing to gas density is less than fluid density, therefore, density is produced in central canal D2 and heat exchanger tube D3
Difference, according to the principle of " thermal siphon ", the saline sewage a1 in central canal D2 is flowing bottom central canal D2
When going out, can be inhaled in heat exchanger tube D3 due to density contrast.Enter the solvent of the saline sewage a1 of heat exchanger tube D3
Can evaporate after being heated, the steam that evaporation obtains enters gas-liquid separate component D11 after being exported by heat exchanger tube D3 top,
Some vapor condensation is had to form gas-liquid mixture b1, this gas-liquid mixture b1 in gas-liquid separate component D11
Gas-liquid separator D1 in gas-liquid separate component D11 carries out gas-liquid separation.When crystallizing evaporator runs one section
After time reaches steady statue, the steam produced due to solvent evaporation constantly exports from heat exchanger tube D3, saliferous
Sewage a1 is not further in heat exchanger tube D3.Now, saline sewage a1 in central canal D2 from top to bottom
Flowing, when flowing out bottom central canal D2, a part of saline sewage a1 is due to the principle of " thermal siphon "
And it is inhaled into heat exchanger tube D3, and exchange through the heat with heat source stream c1 in heat exchanger tube D3, a part of molten
Agent is evaporated, and the steam that evaporation obtains is entered gas-liquid separate component D11 by heat exchanger tube D3 top, divides in gas-liquid
Have some vapor condensation to form gas-liquid mixture b1, this gas-liquid mixture b1 in parts D11 to divide in gas-liquid
Gas-liquid separation is carried out in parts D11.Liquid b4 after gas-liquid separation is back in central canal D2, gas-liquid
Gas b3 after separation is exported by steam (vapor) outlet D6.So circular flow, when being inhaled into heat exchanger tube D3's
When saline solution reaches saturated, salt therein will crystallization.Flow out bottom central canal D2 and be not inhaled into
The liquid not evaporated in the saline sewage a2 and heat exchanger tube D3 of heat exchanger tube D3 and the crystal of precipitation enter thing
In the hopper D4 of material discharging unit for discharging D13, material outlet D5 export.Heat source stream c1 passes through and heat exchange
After saline sewage a1 heat exchange in pipe D3, being condensed into liquid, the condensation water c2 of formation is by evaporation and heat-exchange
The condensation water out D8 output of parts D12.
To sum up, the crystallizing evaporator that the embodiment of the present invention provides integrates heat exchange, evaporates and crystallize,
On the premise of need not the power-equipment such as circulating pump, compressor, " thermal siphon " principle is utilized to realize salt
The heat exchange of solution, evaporation and crystallization process, effectively reduce energy consumption, saves the energy, reduces cost, simultaneously
Also overcome traditional evaporation crystallization equipment heat exchanger and problem that vaporizer is provided separately, reduce evaporation knot
The floor space of brilliant device, saves space.And, in a crystallizing evaporator.Saline sewage just can enter
Row solvent evaporation repeatedly, is conducive to separating out more crystal, thus reduces the salinity of saline sewage.
In above-mentioned crystallizing evaporator, the quantity of described central canal D2 includes but not limited to 1, preferably 1
Root；The quantity of described heat exchanger tube D3 preferably 50～300, such as, can be 100,150,200
Or 250 etc..
In above-mentioned crystallizing evaporator, the internal diameter of the internal diameter of described central canal D2 and described heat exchanger tube D3
Relation is preferred: n0.5d2≤d1≤2n0.5d2, wherein, d1For the internal diameter of described central canal D2, d2Change for described
The internal diameter of heat pipe D3, n is the quantity of described heat exchanger tube D3.If the internal diameter of heat exchanger tube D3 is relatively big, i.e. with
The difference in internal diameters of central canal D2 is away from less, then the solvent that can cause entering the saline solution in heat exchanger tube D3 can not be by
Substantial amounts of evaporation, makes " thermal siphon " phenomenon inconspicuous.If the internal diameter of heat exchanger tube D3 is too small, Ze Cong center
The saline sewage a1 heat exchanger tube more difficult to get access D3 flowed out bottom pipe D2, affects this crystallizing evaporator properly functioning.
In above-mentioned crystallizing evaporator, highly preferred the 150～300mm of described gas-liquid separator D1.Gas
The height of liquid/gas separator D1 is too low, then gas-liquid separation can be made insufficient；And the excessive height of gas-liquid separator 1,
Then can increase the volume that crystallizing evaporator is overall.
In above-mentioned crystallizing evaporator, the shape of described hopper D4 does not has strict requirements, but from material
From the standpoint of the effect of conveying, hopper D4 is preferably shaped to taper.
Second aspect present invention provides a kind of crystallizing evaporator utilizing first aspect present invention to enter saline sewage
The cleaning system that row evaporative crystallization purifies, the structural representation of this cleaning system is as it is shown on figure 3, and combine Fig. 4
And Fig. 5, this cleaning system includes:
Saline sewage intake pipeline 19, described saline sewage intake pipeline 19 for being delivered to institute by saline sewage
State evaporative crystallization cleaning system；
First effect crystallizing evaporator 4, described first effect crystallizing evaporator 4 is the crystallizing evaporator of first aspect present invention,
First effect crystallizing evaporator material inlet 409 connects with described saline sewage intake pipeline 19；
End effect crystallizing evaporator 5, described end effect crystallizing evaporator 5 is the crystallizing evaporator of first aspect present invention,
End effect crystallizing evaporator material inlet 509 connects with first effect crystallizing evaporator material outlet 405, and end effect is evaporated
Crystallizer steam (vapor) outlet 506 connects with first effect crystallizing evaporator steam inlet 407；
Heat source intake pipeline 20, described heat source intake pipeline 20 enters with end effect crystallizing evaporator steam
Mouth 507 connection；And,
Vacuum pump 8, described vacuum pump 8 connects, for described with first effect crystallizing evaporator steam (vapor) outlet 406
Evaporative crystallization cleaning system evacuation.
The crystallizing evaporator of multiple first aspect present invention is cascaded by above-mentioned cleaning system formation continuously
Evaporation and crystallization system, in conjunction with Fig. 4, the operation principle of this cleaning system is:
Initial saline sewage S1 is confessed one's crime by saline sewage intake pipeline 19 and imitates crystallizing evaporator material inlet 409
Enter head effect crystallizing evaporator 4, according to the operation principle of crystallizing evaporator the most to the first aspect of the present invention
Explaining, initial saline sewage S1 steams according to the principle of " thermal siphon " after entering head effect crystallizing evaporator 4
Sending out, (steam produced after solvent evaporation, is equivalent to first aspect present invention to the 3rd indirect steam Q3 obtained
Described in spontaneous evaporation crystallizer steam (vapor) outlet D6 output gas-liquid separation after steam b3, lower with) by head
Effect crystallizing evaporator steam (vapor) outlet 406 exports, and the second saline sewage S2 obtained (is equivalent to the present invention first
What the spontaneous evaporation crystallizer material outlet D5 described in aspect exported is introduced into heat exchanger tube D3 and heat exchanger tube D3
In unevaporated saline sewage) imitated after crystallizing evaporator material outlet 405 exports by end effect evaporative crystallization by head
Device material inlet 509 enters end effect crystallizing evaporator 5, also according to the crystallizing evaporator of first aspect present invention
Operation principle evaporate further, the second indirect steam Q2 obtained is gone out by end effect crystallizing evaporator steam
Imitated crystallizing evaporator steam inlet 407 by head after mouthfuls 506 outputs to enter first effect crystallizing evaporator 4 head is imitated steaming
The saline sewage sent out in crystallizer heat exchanger tube heats.Heat source Q1 passes through heat source intake pipeline
20 are entered end effect crystallizing evaporator 5 by end effect crystallizing evaporator steam inlet 507, to end effect crystallizing evaporator
Saline sewage in heat exchanger tube heats.Owing in end effect crystallizing evaporator 5, saliferous concentration of wastewater reaches
Supersaturation, salt-pepper noise therein separates out, so that the salinity in saline sewage reduces, reaches sewage purification
Purpose.In cleaning system running, vacuum pump 8, to cleaning system evacuation, makes each effect evaporation knot
Brilliant device runs under vacuum conditions.Owing to the boiling point of saline sewage under vacuum conditions can reduce, therefore this
The cleaning system of bright embodiment can be run at a lower temperature, is on the one hand conducive to the evaporation of saline sewage,
On the other hand the operation energy consumption of cleaning system can be reduced.And in the cleaning system that the embodiment of the present invention provides,
Saline sewage in previous effect crystallizing evaporator is carried out by the indirect steam that after utilization, an effect crystallizing evaporator produces
Heating, Appropriate application thermal source, reduces energy consumption further, economizes on resources.
In above-mentioned evaporative crystallization cleaning system, in order to enable more crystal in saline sewage to separate out,
Reduce further the salinity in sewage, can head imitate crystallizing evaporator 4 and end effect crystallizing evaporator 5 it
Between middle effect crystallizing evaporator is set.The evaporation that middle effect crystallizing evaporator still provides for first aspect present invention
Crystallizer.Middle effect crystallizing evaporator material inlet connects with first effect crystallizing evaporator material outlet 405, in
Between imitate crystallizing evaporator steam (vapor) outlet and connect with first crystallizing evaporator steam inlet 407 of imitating；Middle effect evaporation knot
Brilliant device material outlet connects with end effect crystallizing evaporator material inlet 509, and middle effect crystallizing evaporator steam enters
Mouth connects with end effect crystallizing evaporator steam (vapor) outlet 506.Effect of confessing one's crime crystallizing evaporator material outlet 405 exports
The second saline sewage S2 by centre effect crystallizing evaporator material inlet enter in the middle of effect crystallizing evaporator steam
After Faing, then by centre effect crystallizing evaporator material outlet output, and enter end effect crystallizing evaporator 5 continue into
Row evaporation.The quantity of middle effect crystallizing evaporator is preferably 1～4, can be 1,2,3 or
4.Company when the quantity of centre effect crystallizing evaporator is more than 2, between each middle effect crystallizing evaporator
Connect the connected mode between mode with first effect crystallizing evaporator and end effect crystallizing evaporator identical, i.e. work as front evaporator
The steam (vapor) outlet of crystallizer with and its adjacent upper effect crystallizing evaporator steam inlet connection, when front evaporator is tied
The material outlet of brilliant device with and its adjacent next imitate crystallizing evaporator material inlet and connect.
In order to improve the clean-up effect of saline sewage, separate out more crystal, above-mentioned evaporative crystallization purifies system
System also includes: Rose Box 12, described Rose Box 12 connects with end effect crystallizing evaporator material outlet 505；Salt
Tank 14, described saline slot 14 connects with described Rose Box 12；First water pump 13, the first pump intake
(not marking in figure) connects with described saline slot 14, and the first pump outlet (not marking in figure) is with described
End effect crystallizing evaporator material inlet 509 connects.Exported by end effect crystallizing evaporator material outlet 505
The crystal of three saline sewage S3 and precipitation enters Rose Box 12 and filters, and the crystal of described precipitation was stayed
In filter box, the 3rd saline sewage S3 enters saline slot 14, is transmitted back to end effect evaporation knot by the first water pump 13
Brilliant device 5 proceeds evaporation.
Above-mentioned evaporative crystallization cleaning system also includes: steam condenser 6 and vacuum tank 7, described steam is cold
Condenser 6 and vacuum tank 7 are positioned at the pipeline that first effect crystallizing evaporator steam (vapor) outlet 406 connects with vacuum pump 8
On, steam condenser inlet (not marking in figure) connects with described first effect crystallizing evaporator steam (vapor) outlet 406,
Steam condensator outlet (not marking in figure) connects with vacuum tank entrance 701, and vacuum tank second exports 703
Connect with described vacuum pump.The 3rd steam Q3 process steaming that crystallizing evaporator steam (vapor) outlet 406 exports is imitated by head
Vacuum tank 7 is entered after vapour condenser 6 condensation.The steam not being condensed is exported 703 outputs by vacuum tank second.
In order to realize the recycling of water resource, above-mentioned evaporative crystallization cleaning system also includes water pot 9.Institute
State water pot 9 and include that clear water zone 901 and contraminated zone 902, described clear water zone 901 condense with first effect crystallizing evaporator
Water out 408 and middle effect crystallizing evaporator condense water out connection；Described contraminated zone 901 and vacuum tank
First outlet 702 connection.In steam condenser 6, condense the condensation water that obtains enter after vacuum tank 7 by very
Slack tank first exports 702 outputs and enters the contraminated zone 901 of water pot 9.Imitated crystallizing evaporator by head and condense water out
408 and middle effect crystallizing evaporator condense the water that condenses of water out output and enter the clear water zone 901 of water pot 9.Also
It is defeated that the second condensation water connected with the contraminated zone of described water pot can be set in above-mentioned evaporative crystallization cleaning system
Go out pipeline 22, and the 3rd condensation water delivery pipe line 23 connected with the clear water zone of described water pot.And
Two condense on water delivery pipe lines 22 and arrange the second water pump 10, condense the 3rd and arrange the on water delivery pipe line 23
Three water pumps 11.Water impurity in clear water zone 901 is less, therefore directly can be condensed water delivery pipe line by the 3rd
23 are delivered to the water bunkerages such as clear water reserviors carries out storing use.And the water in contraminated zone 902 is by initially containing
Condensing after the solvent evaporation of salt sewage and obtain, impurity content is of a relatively high, therefore can be condensed water by second defeated
Go out pipeline 22 to be delivered to homogenizing regulating reservoir and carry out homogenizing, be to use after impurity content therein reduces.
Also include in above-mentioned evaporative crystallization cleaning system: first condenses water delivery pipe line 21, and described first coagulates
Bear water export pipeline 21 to connect with end effect crystallizing evaporator condensation water out.Heat source Q1 evaporates with end effect
The condensation water obtained after saline sewage heat exchange in crystallizer 5 is condensed water delivery pipe line 21 by first and exports.By
In the water that condenses exported by end effect crystallizing evaporator 5, still there is higher temperature, it therefore can be utilized right
Initial saline sewage S1 preheats, it is achieved effective utilization of the energy.Therefore, it can condense water by first defeated
Go out pipeline 21 to intersect with saline sewage intake pipeline 19, preheater 3 is set in intersection.
Also include that be arranged on described saline sewage intake pipeline 19 delays in above-mentioned evaporative crystallization cleaning system
Rush tank 1 and feed pump 2.Regulate initial saline sewage S1 by surge tank 1 and feed pump 2 and enter head effect
The flow velocity of crystallizing evaporator 4, makes evaporative crystallization cleaning system even running.
Third aspect present invention provides the saline sewage evaporation of a kind of cleaning system utilizing second aspect present invention
Purging by crystallization technique.Seeing Fig. 4, this purification technique is:
Initial saline sewage S1 is delivered to first effect crystallizing evaporator 4, in described first effect crystallizing evaporator 4
Initial saline sewage S1 is evaporated, obtains the second saline sewage S2 and the 3rd indirect steam Q3；By
Two saline sewages conveying S2 are to end effect crystallizing evaporator 5, to described the in described end effect crystallizing evaporator 5
Two saline sewage S2 are evaporated, and obtain the 3rd saline sewage S3, crystal and the second indirect steam Q2；
Described second indirect steam Q2 is delivered to first effect crystallizing evaporator 4, described initial saline sewage S1 is entered
Row heating makes it evaporate；Defeated for heat source Q1 is delivered to end effect crystallizing evaporator 5, dirty to described second saliferous
Water S2 carries out heating makes it evaporate；Described first effect crystallizing evaporator 4 and end effect crystallizing evaporator 5 are the present invention
The crystallizing evaporator of first aspect；Utilize vacuum pump 8 evacuation, make described first effect crystallizing evaporator 4 and end
Effect crystallizing evaporator 5 is internal is in vacuum state, and described end effect crystallizing evaporator 5 internal pressure is more than described
First effect crystallizing evaporator 4 internal pressure；The temperature 5 of described end effect crystallizing evaporator is more than described first effect evaporation
The temperature of crystallizer 4.
The evaporative crystallization that the embodiment of the present invention provides purifies the stream that technique is a kind of countercurrent evaporation technique, i.e. steam
Contrary to the flow direction with saline sewage.The indirect steam that a rear effect crystallizing evaporator generates is to previous effect evaporation knot
Saline sewage in brilliant device heats, it is possible to effectively utilize the energy.And in above-mentioned purification technique, first
Effect crystallizing evaporator 4 and end effect crystallizing evaporator 5 inside are in vacuum state, and saliferous is dirty under vacuum conditions
The boiling point of water reduces, and is on the one hand conducive to the evaporation of saline sewage, on the other hand can reduce cleaning system
Operation energy consumption.
In above-mentioned evaporative crystallization purifies technique, the temperature of first effect crystallizing evaporator 4 is preferably 45～50 DEG C,
The temperature of end effect crystallizing evaporator 5 is preferably 70～75 DEG C, and the temperature of heat source is preferably 85～95 DEG C；First
Effect crystallizing evaporator internal pressure is preferably 9.5～10KPa, and end effect crystallizing evaporator internal pressure is preferably
36～36.5KPa.Wherein, heat source can utilize the low-temperature heat quantity of refinery, thus fully recycles refining
The low-temperature heat quantity of factory, brings direct economic benefit to enterprise.
In above-mentioned evaporative crystallization purifies technique, when the cleaning system of second aspect present invention includes centre
During effect crystallizing evaporator, then described second saline sewage S2 is delivered to middle effect crystallizing evaporator, described
The the second indirect steam Q2 utilizing end effect crystallizing evaporator 5 to export in middle single-effect evaporator carries out heating evaporation,
Gained saline sewage is delivered to described end effect crystallizing evaporator 5, and gained indirect steam is delivered to first effect evaporative crystallization
Device 4；Now, described first effect crystallizing evaporator 4, middle effect crystallizing evaporator and end effect crystallizing evaporator 5
Internal pressure raises successively, and temperature raises the most successively.
In order to improve the clean-up effect of saline sewage, separate out more crystal, above-mentioned evaporative crystallization purifies work
Skill also includes: the 3rd saline sewage S3 and the crystal that are obtained by end effect crystallizing evaporator 5 are delivered to Rose Box 12,
After being filtered by crystal, described 3rd saline sewage S3 enters saline slot 14, then is transmitted back to end by the first water pump 13
Effect crystallizing evaporator 5, is evaporated together with the second saline sewage S2 in end effect crystallizing evaporator 5.
In order to realize the recycling of water resource, above-mentioned evaporative crystallization purifies technique and also includes: imitated by head
The first condensation water N1 that crystallizing evaporator 4 obtains and the condensation water that middle effect crystallizing evaporator obtains are delivered to
The clear water zone 901 of water pot 9；It is delivered to steam by the 3rd indirect steam Q3 that described first effect crystallizing evaporator obtains
Vapour condenser 6, is delivered to the contraminated zone of water pot 9 after vacuum tank 7 after the 3rd condensation water N3 that condensation obtains
902。
In above-mentioned evaporative crystallization purifies technique, it is also possible to utilize that end effect crystallizing evaporator 5 obtains second
Condense water N2 initial salt solution S1 to be heated, to realize making full use of of the energy.
In above-mentioned evaporative crystallization purifies technique, it is also possible to by the in the contraminated zone 902 entering water pot 9
Three condense water N3 is delivered to homogenizing regulating reservoir, by the first condensation water in the clear water zone 901 entering water pot 9
The condensation water that N1 and middle effect crystallizing evaporator obtain is delivered to clear water reserviors, it is achieved the recycling to water resource.
In following example, as a example by middle single-effect evaporator quantity is 4, the most whole evaporative crystallization cleaning system
As a example by having 6 effect crystallizing evaporators, the saline sewage evaporative crystallization purification technique of the present invention is more entered one
The description of step
Embodiment 1
The saline sewage evaporative crystallization of the present embodiment purifies in technique, central canal D2 in crystallizing evaporator used
Quantity is 1, and the quantity of heat exchanger tube D3 is 200, the internal diameter of the internal diameter d2 and central canal D2 of heat exchanger tube D3
The relation of d1 is d2=14d1, and the height of gas-liquid separator D1 is 200mm.
In the present embodiment, heat source Q1 used is the low-temperature water heating from 90 DEG C of refinery, initial saliferous
The temperature of sewage S1 is 25 DEG C.
In conjunction with Fig. 7, the saline sewage evaporative crystallization of the present embodiment purifies technique and is；
Initial saline sewage S1 initially enters surge tank 1, then is 90000kg/h by feed pump 2 by Flow-rate adjustment
After be delivered to preheater 3, in preheater 3 with from that the temperature of end effect crystallizing evaporator 5 is 76 DEG C
Two condense temperature after water N2 carries out heat exchange reaches 48 DEG C, effect of then confessing one's crime crystallizing evaporator material inlet 409
Enter head effect crystallizing evaporator 4, imitate the temperature is 56 DEG C the 7th of crystallizing evaporator 15 with in the middle of first
After indirect steam Q7 carries out heat exchange evaporation, (heat is negative through steam condenser 6 for the 3rd indirect steam Q3 obtained
Lotus is 7.467MKcal/h) cooling after obtain the 3rd condensed water N3, the 3rd condensed water N3 is through vacuum tank 7
Enter the contraminated zone 902 of water pot 9, be then delivered to homogenizing by the second water pump 10 with the flow of 12896kg/h
Regulating reservoir carries out homogenizing.The second saline sewage S2 entrance that crystallizing evaporator material outlet 405 exports is imitated by head
In the middle of first after effect crystallizing evaporator 15 be 60 DEG C from the temperature of effect crystallizing evaporator 16 in the middle of second
6th indirect steam Q6 carries out heat exchange evaporation, and gained the 4th saline sewage S4 enters effect evaporation knot in the middle of second
Brilliant device 16 enters with the 5th indirect steam Q5 that temperature is 60 DEG C from the 3rd middle effect crystallizing evaporator 17
Row heat exchange is evaporated, and the 5th saline sewage S5 obtained enters effect crystallizing evaporator 17 in the middle of the 3rd, and from the
In the middle of four, the 4th indirect steam Q4 that temperature is 70 DEG C of effect crystallizing evaporator 18 carries out heat exchange evaporation, gained
6th saline sewage S6 enters the 4th crystallizing evaporator 18, with the temperature from end effect crystallizing evaporator 5 is
The second indirect steam Q2 of 85 DEG C carries out heat exchange evaporation, and the 7th saline sewage S7 obtained enters end effect evaporation
Crystallizer 5 carries out heat exchange evaporation with the low-temperature water heating that temperature is 90 DEG C (i.e. heat source Q1) from refinery
After, its concentration reaches supersaturation, and salt-pepper noise therein separates out, the crystal of precipitation and the 3rd saline sewage S3 mono-
Rising and enter Rose Box 12, crystal is stayed in Rose Box 12, and the 3rd saline sewage S3 enters saline slot 14, the
The 3rd saline sewage S3 in saline slot 14 is transmitted back to end effect evaporation with the flow of 6750kg/h by one water pump 13
Crystallizer 5 proceeds heat exchange evaporation.Heat source Q1 is dirty with the 7th saliferous in end effect crystallizing evaporator 5
After water S7 heat exchange, obtaining the second condensation water N2 that temperature is 76 DEG C, second condenses water N2 is condensed by first
Water feed-line 21 is delivered to preheater 3 and preheats initial saline sewage S1.7th indirect steam Q7
Obtain after heat exchange first condensation water N1, the 6th indirect steam Q6 heat exchange after obtain the 4th condensation water N4,
Obtain after the 5th condensation water N5, the 4th indirect steam Q4 heat exchange obtained after 5th indirect steam Q5 heat exchange
The 7th condensation water N7 obtained after 6th condensation water N6 and the second indirect steam Q2 heat exchange enters water pot 9
Clear water zone 901, be then delivered to clear water reserviors by the 3rd water pump 11 with the flow of 70354kg/h and reclaim
Utilize.
In above-mentioned evaporation and crystal process, vacuum pump 8 is to evaporative crystallization cleaning system evacuation, and first effect is steamed
Send out and imitate in the middle of crystallizing evaporator the 16, the 3rd in the middle of effect crystallizing evaporator 15, second in the middle of crystallizer 4, first
In the middle of effect crystallizing evaporator the 17, the 4th, the pressure of effect crystallizing evaporator 18 and end effect crystallizing evaporator 5 is successively
For 9.8kPa, 16.1kPa, 20.2kPa, 24.3kPa, 28.6kPa, 36.1kPa, temperature is followed successively by 46 DEG C,
56 DEG C, 60 DEG C, 65 DEG C, 68 DEG C, 74 DEG C, thermic load is followed successively by: 7.151MKcal/h, 7.878MKcal/h,
8.088MKcal/h、8.244MKcal/h、8.331MKcal/h、8.425MKcal/h。
After using above evaporative crystallization to purify technique, to the effect evaporation of confessing one's crime in the clear water zone 901 of water pot 9
The middle effect of effect crystallizing evaporator the 16, the 3rd in the middle of effect crystallizing evaporator 15, second in the middle of crystallizer 4, first
In the middle of crystallizing evaporator 17 and the 4th, the character condensing water of effect crystallizing evaporator 18 is according to GB1576-2008
Detecting, and contrast with every character of initial saline sewage, acquired results is as shown in table 1.
Table 1 steam condensate property list
| Project | Initial saline sewage | Steam condensate |
| pH | 6-9 | 6.5-8.5 |
| SS(mg/L) | ≤50 | ≤10 |
| CODcr(mg/L) | ≤200 | ≤30 |
| BOD5(mg/L) | ≤12 | ≤5 |
| Petroleum-type (mg/L) | ≤10 | ≤5 |
| Volatile Phenols (mg/L) | ≤0.1 | ≤0.01 |
| NH3-N(mg/L) | ≤12 | ≤3 |
| TDS(mg/L) | ≤5000 | ≤800 |
| Cl-(mg/L) | ≤6500 | ≤200 |
To sum up, the embodiment of the present invention provide firstly a kind of integrate heat exchange, evaporate and crystallize novel
Crystallizing evaporator, crystallizing evaporator energy consumption is low, floor space is little for this.The embodiment of the present invention is by this evaporative crystallization
Device is applied in continuous evaporative crystallization system, is cascaded by multiple crystallizing evaporators, enters saline sewage
Row purifies, and arranges vacuum pump, to cleaning system evacuation, make cleaning system relatively low in cleaning system
At a temperature of can be realized as the purification to saline sewage, the embodiment of the present invention also to above-mentioned saline sewage purify system
The technological parameter that system runs is optimized, and ensure that the clean-up effect of saline sewage on the basis of reducing energy consumption.
The cleaning system of embodiment of the present invention offer and purification technique disclosure satisfy that the requirement of continuous feed, continuous pulp discharge,
Operate steadily, can effectively solve the Utilizing question after petroleum chemical industry saline sewage purifies, reduce sewage
Discharge.
The above is for only for ease of those skilled in the art and understands technical scheme, and need not
To limit the present invention.All within the spirit and principles in the present invention, any amendment of being made, equivalent,
Improve, should be included within the scope of the present invention.
Claims (16)
1. a saline sewage crystallizing evaporator, it is characterised in that described crystallizing evaporator includes:
Evaporation and heat-exchange parts (D12), for evaporating the solvent in described saline sewage, make salt-pepper noise separate out；
Gas-liquid separate component (D11), in the steam evaporation of described evaporation and heat-exchange parts (D12) obtained
Gas separate with liquid；And
Discharge of materials parts (D13), for tying the saline sewage after evaporation and gained crystal from described evaporation
Brilliant device exports；
Described gas-liquid separate component (D11) connects with the top of described evaporation and heat-exchange parts (D12)；Described
Discharge of materials parts (D13) connect with the bottom of described evaporation and heat-exchange parts (D12)；
Wherein,
Described evaporation and heat-exchange parts (D12) including: shell (D10), central canal (D2), heat exchanger tube (D3),
Steam inlet (D7) and condensation water out (D8)；
Described central canal (D2) is used for carrying saline sewage；Described heat exchanger tube (D3) is dirty for concentrating salt-containing
The solvent of water, makes salt-pepper noise separate out；Described central canal (D2) and heat exchanger tube (D3) are positioned at described shell
(D10) internal, described central canal (D2) is parallel with described heat exchanger tube (D3), described central canal (D2)
And the two ends of described heat exchanger tube (D3) respectively with described gas-liquid separate component (D11) and described discharge of materials
Parts (D13) connect；Described steam inlet (D7) is positioned at described shell (D10) top, described condensation
Water out (D8) is positioned at described shell (D10) bottom；
The internal diameter of described central canal (D2) with the relation of the internal diameter of described heat exchanger tube (D3) is:
n0.5d2≤d1≤2n0.5d2, wherein, d1For the internal diameter of described central canal (D2), d2For described heat exchanger tube (D3)
Internal diameter, n is the quantity of described heat exchanger tube (D3)；
Described gas-liquid separate component (D11) includes gas-liquid separator (D1), material inlet (D9) and steams
Vapor outlet (D6), described steam (vapor) outlet (D6) is positioned at described gas-liquid separator (D1) top, described thing
Material entrance (D9) is positioned at described gas-liquid separator (D1) lower section；
Described discharge of materials parts (D13) include hopper (D4) and material outlet (D5).
Crystallizing evaporator the most according to claim 1, it is characterised in that described central canal (D2)
Quantity is 1, and the quantity of described heat exchanger tube (D3) is 50～300.
Crystallizing evaporator the most according to claim 1, it is characterised in that described gas-liquid separator (D1)
Height be 150～300mm.
4. a saline sewage evaporative crystallization cleaning system, it is characterised in that described cleaning system includes:
Saline sewage intake pipeline (19), described saline sewage intake pipeline (19) is for defeated by saline sewage
Deliver to described evaporative crystallization cleaning system；
First effect crystallizing evaporator (4), described first effect crystallizing evaporator (4) is the evaporation described in claim 1
Crystallizer, first effect crystallizing evaporator material inlet (409) connects with described saline sewage intake pipeline (19)；
End effect crystallizing evaporator (5), described end effect crystallizing evaporator (5) is the evaporation described in claim 1
Crystallizer, end effect crystallizing evaporator material inlet (509) and first effect crystallizing evaporator material outlet (405)
Connection, end effect crystallizing evaporator steam (vapor) outlet (506) is with first effect crystallizing evaporator steam inlet (407) even
Logical；
Heat source intake pipeline (20), described heat source intake pipeline (20) and end effect crystallizing evaporator
Steam inlet (507) connects；And,
Vacuum pump (8), described vacuum pump (8) connects with first effect crystallizing evaporator steam (vapor) outlet (406),
For to described evaporative crystallization cleaning system evacuation.
Evaporative crystallization cleaning system the most according to claim 4, it is characterised in that described evaporative crystallization
Cleaning system also includes:
Middle effect crystallizing evaporator, described middle effect crystallizing evaporator is positioned at described first effect crystallizing evaporator (4)
With between end effect crystallizing evaporator (5), described middle effect crystallizing evaporator is the evaporation described in claim 1
Crystallizer, middle effect crystallizing evaporator material inlet is with described first effect crystallizing evaporator material outlet (405) even
Logical, middle effect crystallizing evaporator steam (vapor) outlet connects with described first effect crystallizing evaporator steam inlet (407)；
Middle effect crystallizing evaporator material outlet connects with described end effect crystallizing evaporator material inlet (509), middle
Effect crystallizing evaporator steam inlet connects with described end effect crystallizing evaporator steam (vapor) outlet (506).
Evaporative crystallization cleaning system the most according to claim 5, it is characterised in that in the middle of described, effect is steamed
The quantity sending out device is 1～4.
Evaporative crystallization cleaning system the most according to claim 4, it is characterised in that described evaporative crystallization
Cleaning system also includes:
Rose Box (12), described Rose Box (12) connects with end effect crystallizing evaporator material outlet (505)；
Saline slot (14), described saline slot (14) connects with described Rose Box (12)；
First water pump (13), the first pump intake connects with described saline slot (14), the first water pump water outlet
Mouth connects with described end effect crystallizing evaporator material inlet (509).
Evaporative crystallization cleaning system the most according to claim 7, it is characterised in that described evaporative crystallization
Cleaning system also includes:
Steam condenser (6) and vacuum tank (7), described steam condenser (6) and vacuum tank (7)
Being positioned on the pipeline that first effect crystallizing evaporator steam (vapor) outlet (406) connects with vacuum pump (8), steam condenses
Device entrance connects with described first effect crystallizing evaporator steam (vapor) outlet (406), steam condensator outlet and vacuum tank
Entrance (701) connects, and vacuum tank second exports (703) and connects with described vacuum pump.
Evaporative crystallization cleaning system the most according to claim 8, it is characterised in that described evaporative crystallization
Cleaning system also includes:
Water pot (9), described water pot (9) includes clear water zone (901) and contraminated zone (902), described clear water
District (901) and first effect crystallizing evaporator condense water out (408) and middle effect crystallizing evaporator condenses water
Outlet；Described contraminated zone (901) exports (702) with vacuum tank first and connects.
10. a saline sewage evaporative crystallization purifies technique, it is characterised in that described purification technique is:
Initial saline sewage (S1) is delivered to first effect crystallizing evaporator (4), at described first effect evaporative crystallization
Initial saline sewage (S1) is evaporated by device (4), obtains the second saline sewage (S2) and the three or two
Secondary steam (Q3)；
Second saline sewage (S2) is delivered to end effect crystallizing evaporator (5), at described end effect evaporative crystallization
Described second saline sewage (S2) is evaporated by device (5), obtains the 3rd saline sewage (S3), crystalline substance
Body and the second indirect steam (Q2)；Described second indirect steam (Q2) is delivered to first effect evaporative crystallization
Device (4), carries out heating to described initial saline sewage (S1) and makes it evaporate；
Heat source (Q1) is delivered to end effect crystallizing evaporator (5), to described second saline sewage (S2)
Carrying out heating makes it evaporate；
Described first effect crystallizing evaporator (4) and end effect crystallizing evaporator (5) are the steaming described in claim 1
Send out crystallizer；
Utilize vacuum pump (8) evacuation, make described first effect crystallizing evaporator (4) and end effect crystallizing evaporator
(5) inside is in vacuum state, and described end effect crystallizing evaporator (5) internal pressure is steamed more than described first effect
Send out crystallizer (4) internal pressure；The temperature of described end effect crystallizing evaporator (5) is more than described first effect evaporation
The temperature of crystallizer (4).
11. purification techniques according to claim 10, it is characterised in that described first effect crystallizing evaporator
(4) temperature is 45～50 DEG C, and the temperature of described end effect crystallizing evaporator (5) is 70～75 DEG C, described in add
The temperature of thermal source (Q1) is 85～95 DEG C；Described first effect crystallizing evaporator (4) internal pressure is 9.5～10KPa,
Described end effect crystallizing evaporator (5) internal pressure is 36～36.5KPa.
12. purification techniques according to claim 10, it is characterised in that described purification technique also includes:
Described second saline sewage (S2) is delivered to middle effect crystallizing evaporator, effect evaporation in the middle of described
Utilizing described second indirect steam (Q2) to carry out heating evaporation in device, gained saline sewage is delivered to described end
Effect crystallizing evaporator (5), gained indirect steam is delivered to first effect crystallizing evaporator (4)；
In the middle of described, effect crystallizing evaporator is the crystallizing evaporator described in claim 1；
In described first effect crystallizing evaporator (4), middle effect crystallizing evaporator and end effect crystallizing evaporator (5)
Portion's pressure raises successively, described first effect crystallizing evaporator (4), middle effect crystallizing evaporator and end effect evaporation
The temperature of crystallizer (5) raises successively.
13. purification techniques according to claim 12, it is characterised in that effect evaporative crystallization in the middle of described
The quantity of device is 1～4.
14. purification techniques according to claim 10, it is characterised in that described purification technique also includes:
The 3rd saline sewage (S3) and the crystal that are obtained by end effect crystallizing evaporator (5) are delivered to Rose Box (12),
After being filtered by crystal, described 3rd saline sewage (S3) enters saline slot (14), then by the first water pump (13)
It is transmitted back to end effect crystallizing evaporator (5), at described end effect evaporative crystallization together with the second saline sewage (S2)
Device is evaporated in (5).
15. purification techniques according to claim 12, it is characterised in that described purification technique also includes:
Head is imitated the first condensation water (N1) that crystallizing evaporator (4) obtains and middle effect crystallizing evaporator obtains
Condense water and be delivered to the clear water zone (901) of water pot (9)；Described first effect crystallizing evaporator (4) is obtained
3rd indirect steam (Q3) is delivered to steam condenser (6), and in described steam condenser (6), condensation obtains
The 3rd condensation water (N3) after vacuum tank (7), be delivered to the contraminated zone (902) of water pot (9).
16. purification techniques according to claim 10, it is characterised in that described purification technique also includes:
Initial salt solution (S1) is entered by the second condensation water (N2) utilizing end effect crystallizing evaporator (5) to obtain
Row heating.
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| CN111559769A (en) * | 2020-04-26 | 2020-08-21 | 北京中矿未来科技集团有限公司 | Evaporative crystallization system and method for industrial wastewater difficult to degrade |
| CN113526600A (en) * | 2021-06-17 | 2021-10-22 | 中国恩菲工程技术有限公司 | Desalting and deoxidizing equipment and desalting and deoxidizing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111559769A (en) * | 2020-04-26 | 2020-08-21 | 北京中矿未来科技集团有限公司 | Evaporative crystallization system and method for industrial wastewater difficult to degrade |
| CN113526600A (en) * | 2021-06-17 | 2021-10-22 | 中国恩菲工程技术有限公司 | Desalting and deoxidizing equipment and desalting and deoxidizing method |
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