CN1760136A - A kind of industrial water system clean preparation method that comprises recirculated cooling water and boiler water supply - Google Patents
A kind of industrial water system clean preparation method that comprises recirculated cooling water and boiler water supply Download PDFInfo
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Abstract
The industrial water system clean preparation method that the present invention proposes comprises: the industrial fresh water water intaking that will be used for boiler water supply and recirculated cooling water all feeds the water cooling pond of circulating cooling system; In system, be provided with and comprise that the pure water of membrane distillation device produces and the water technology unit; To feed pure water production and water technology unit through the part of the high-temperature cooling water after cooling is used, rest part still finally returns cooling tower; The pure water part that pure water production and water technology unit are produced is used for boiler for producing and uses or supply other purposes outward, and another part can the Returning water pond but do not needed usually; Pure water produce and the final blowdown discharge system of the unitary sewer of water technology as system outside; Controlled chilling water cycles of concentration makes water coolant need not take the scale inhibition measure as adding Scale inhibitors; The present invention has proposed the control and the optimization method of main technologic parameters simultaneously.The technical progress that can realize by the present invention comprises: water coolant need not be taked the scale inhibition measure, obtains cheap pure water, reduce the fuel consumption of water intaking and blowdown, minimizing boiler for producing.
Description
One, technical field
The invention belongs to industrial water system clearer production technology field, particularly a kind of cleaner production mode and technology thereof of utilizing hydrophobic microporous membrane production pure water, recovery used heat, realization recirculated cooling water not to have the Scale inhibitors operation.
Two, background technology
In the total water intaking in the whole world and total draining, account for a greater part ofly from the water intaking of industry and draining, and the water supply that is used for industry cooling and power station (boiler) in the industry water intaking has accounted for a greater part of.A lot of industrial circles such as electric power, chemical industry often have the demand of industry cooling and power station water supply simultaneously.
The power station water intaking mainly is to provide softening water or de-salted water for boiler for producing.In the industrial production, power station is fetched water nearly all directly from fresh indusqtrial water supply, and need soften or desalting treatment at present.Usually the softening or desalinating process that adopts has ion-exchange, electrodialysis, reverse osmosis, nanofiltration etc.The producing water ratio of above-mentioned technology is all lower.Ion exchange process need consume a large amount of chemical such as regeneration soda acid, produces secondary pollution, is a kind of more uncleanly technology.Investments such as electrodialysis, reverse osmosis, nanofiltration or water producing cost are higher, and these embrane method water preparation processes need consume lot of energy.
Industrial colling accounts for the over half of the total water intaking of industry.Process of cooling mainly is a physical properties of utilizing the hydro-thermal capacity high, and through behind the cooling heat transferring, the temperature of water will rise to 50～70 ℃ usually.At cooling system, be the conserve water resource, generally carry out cooling water circulation use both at home and abroad.The flow of recirculating cooling water system is very high, normally the water intaking more than 3～4 times.In cooling water circulation use, owing to reasons such as evaporation, wind cause water loss and deteriorating water quality in the system.Circulating cooling water quality descends can be divided into two kinds of situations.First suspended contaminant increases, and it two is increases of dissolubility pollutant matter concentration.Suspended contaminant in the recirculated cooling water mainly contains following source: the suspended contaminant of carrying in (1) make up water comprises the suspended contaminant that original dissolubility pollutant in the water forms because of the change transitions of the physical and chemical state of water; (2) from air and be cooled dirt on the device such as dust, chip, winged insect, greasy dirt etc.; (3) microbiological materials of multiplying in the recirculating cooling water system such as bacterium, algae etc.The increase of recirculated cooling water dissolubility pollutant concentration mainly is the increase of soluble solid material concentration.This mainly be because of water that evaporation loses almost be pure water, original soluble solid still rests in the system in the water, and the new water of going into of mending all contains the concentration of dissolved solid usually, this means that the soluble solid concentration in the recirculating cooling water system has ever-increasing trend.In order to keep the stable of water quality and quantity in the system, must be controlled by certain means (as water treatment or blowdown).Control ratio for suspended contaminant is easier to, and has developed at present various sophisticated technologies, can effectively control as carrying out coagulation-precipitation (air supporting)-conventional processing such as filtration-sterilization and disinfection by extension recirculated water from system.Increase for solvability inorganic salts material concentration does not have suitable processing means.At present in actual water treatment, mainly be technologies such as reverse osmosis, nanofiltration, electrodialysis, ion-exchange for the removal method of solvability salts substances in the water, this is the main desalination means of present indusqtrial water supply and domestic water supply.But these means all need bigger investment and running cost usually, only adopt in special occasions such as industrial de-salted water production, sea water desaltination system tap water etc., almost do not have actual application value for large-scale recirculated cooling water is handled.Therefore, aspect recirculated cooling water,, promptly constantly from system, discharge a certain amount of water (being blowdown) to discharge unnecessary soluble solid material for the concentration of controlling soluble solid nearly all is to rely on blowdown.Blowdown is many more, needs additional water many more.In order to reduce blowdown, must improve the soluble solid concentration in the blowdown.At present, the mode of industrial circulating cooling water blowdown is directly to discharge certain water yield from system, and in fact the concentration that therefore improves blowdown mean the concentration that needs all recirculated waters in the raising system, is referred to as to improve the cooling circulating water cycles of concentration on specialty.This is the ultimate principle that present recirculating cooling water system concentrates operation, also is the operation scheme of the industrial cooling circulating water system that passes through.Along with the increase of cycles of concentration, the trend of the less salts substances crystalline deposit in be cooled object and pipeline of some solubleness increases in the water, fouling that Here it is.The harm of fouling is very big, therefore improves the recirculated cooling water cycles of concentration and prevents that fouling from being the present industrial circulating cooling water most critical issue to be solved in service, and the means that relied on are various method of scale inhibition, wherein especially to add Scale inhibitors.Scale inhibitors is a water treatment agent the most large in the Treatment of Industrial Water, has constituted the capital cost (except that the water intaking cost) of recirculated cooling water operation.Dependence to Scale inhibitors has increased running cost on the one hand, and present on the other hand most Scale inhibitorss all are environmental pollutants, certainly will increase the pollution of recirculated cooling water blowdown to environment.
From top brief discussion as can be seen: water coolant (1) industrial production and power station supply water and account for the overwhelming majority of fresh indusqtrial water supply, and be significant for cleaner production, water saving, the minimizing sewage discharge of whole industry at the cyclic utilization rate of this two link facilities cleaner production and raising water; (2) power station in the industrial production supplies water basically all directly from fresh indusqtrial water supply, and the target of water treatment mainly is to produce softening water or de-mineralized water, and present water preparation process or not enough cleaning or water producing cost and energy consumption are higher; (3) recirculated cooling water mainly utilizes the cooling performance of water, contains a large amount of used heat in the high temperature circulation water after the use; (4) discharge soluble solid, pollutent prevent that fouling from being the main task of recirculated cooling water blowdown; (5) at present the recirculating cooling water system blowdown mode that concentrates operation must cause to the dependence of Scale inhibitors with to the pollution of environment, is a kind of uncleanly comparatively speaking mode of production.For this reason, target of the present invention is to propose a kind of more recirculated cooling water-power station water supply operation scheme and processing method thereof of cleaning.The cleaner production mode that will utilize the membrane distillation method to realize reclaiming used heat among the present invention, to improve the water circulation use rate, produce pure water, cancellation adds Scale inhibitors in recirculated cooling water.
Membrane distillation is called cryogenic film distillation again, be a kind ofly adopt dewatering microporous film, be the membrane sepn process of motivating force with the vapor pressure difference of film both sides.When the aqueous solution of differing temps was separated by hydrophobic membrane, because the hydrophobicity of film, the aqueous solution of both sides all can not enter opposite side by film.But because the water vapor pressure of the high temperature side aqueous solution and membrane interface is higher than low temperature side, water vapor can see through that fenestra enters low temperature side and condensation becomes water seepage from high temperature side, and this water seepage by the acquisition of distillatory principle is the good pure water of a kind of quality; Dense water is then stayed high temperature side to be become and oozes Yu Shui.The membrane distillation process need not be heated to boiling point with solution, as long as the suitable temperature difference is kept in the film both sides, this process just can be carried out, the cryogenic film that therefore is otherwise known as distillation.
Membrane distillation is for extensive sea water desalinization proposes at first, has just begun than systematic research as far back as the sixties in last century.Compare the advantage highly significant of membrane distillation with the reverse osmosis process that is all embrane method: the process of (1) membrane distillation is almost carried out under normal pressure, and equipment is simple, and is easy to operate; (2) in the membrane distillation process of the non-volatile aqueous solution, owing to only have water vapour can see through fenestra, so distillate is very pure; (3) can handle the brackish water of high concentration, even solution concentration can be formed to hypersaturated state and be so-called membrane distillation crystallization technique, so the producing water ratio of membrane distillation can be far above reverse osmosis.But the shortcoming of membrane distillation is remarkable too: because membrane distillation is the process of a phase transformation, the latent heat of vaporization has reduced utilization efficiency of heat energy, makes membrane distillation become a kind of process of highly energy-consuming.So recent decades, the research and development that the membrane distillation field is carried out mainly concentrate on: (1) reduces the performance of membrane distillation process energy consumption, raising distillation device, the cost of reduction distillation device, as Chinese patent application 03120257.8,02160555.6,98809445.2,88209756.3,98809445.2, the record of Netherlands patent applications NL1012167, United States Patent (USP) 4545862, UK Patent Application GB1225254A, German patent application 3123409, european patent application 0164326, International Patent Application WO 8607585A etc.; (2) exploitation is fit to the field that membrane distillation technique is used, as Chinese patent application 02138636.6,01106877.9,01801127.6,93104942.3.But to be objective,, therefore do not obtain extensive commercialization truly so far because membrane distillation is compared the advantage that there is no with other desalting method such as reverse osmosis on running cost.Though in the research and development that membrane distillation technique is carried out, all claim usually and will utilize the used heat resource to produce pure water, but in scope known to the contriver, at home and abroad all do not have at present membrane distillation technique is applied to recirculated cooling water-comprehensive cleaner production of power station waterworks, reclaims used heat, produces pure water, cuts down the innovation and creation of fetching water and polluting blowdown.About the application and the progress of film distillation technology, can be with reference to pertinent literature (the 1. reviews and prospects of film distillation technology, " Urban Construction Institutes Of Tianjin's journal " the 9th volume the 2nd phase pp100～110; 2. film distillation technology and applied research thereof make progress, " membrane science and technology " the 23rd volume the 4th phase pp67～92).
" a kind of treatment process of recirculated cooling water " (publication number: CN1448342) propose the bypass decontamination line is set in recirculating cooling water system, wherein adopt reverse osmosis as main blowdown means.Other has " a kind of by-pass flow treatment process of industrial circulating cooling water " (publication number CN1522974A) openly to invent similarly to last, only proposes with ion-exchange as main recirculated cooling water blowdown means.No matter be ion-exchange or reverse osmosis, the cost of its blowdown is all than higher, and technology and device complexity, may use in extensive recirculating cooling water system hardly.
Three, summary of the invention
Main purpose of the present invention provides a kind of more industrial circulating cooling water-power station water supply mode of production and correlation technique thereof of cleaning.
Industrial circulating cooling water provided by the invention-power station water supply cleaner production mode comprises following content:
(1) the membrane distillation device that comprises hydrophobic microporous membrane is set in system.One side of hydrophobic microporous membrane is a high temperature side, in order to pass through pyritous water.The opposite side of hydrophobic microporous membrane is a low temperature side, and the steam that oozes out from high temperature side in order to condensation is also collected water of condensation.Take certain measure at low temperature side, as water-cooled and air cooling, to promote to ooze out the aggegation of steam.The water of high temperature side has the trend of cooling in the membrane distillation process, therefore preferably take measures at high temperature side, as introduce high temperature circulation water Q in addition from system
2By interchanger G
2Water Q to high temperature side
1Heating makes the poor Δ T of itself and ambient air temperature
1Remain on more than 5 ℃ Q
2With Q
1Not directly contact.Preferred Δ T
1＞20 ℃.
(2) will be used for the fresh service water E that power station supplies water
1With recirculated cooling water moisturizing E
2All feed the water cooling pond of recirculating cooling water system earlier, and as recirculated cooling water.
(3) cryogenic recirculated cooling water is by interchanger G
0Become high temperature circulation water after cooling off the object that is cooled.The speed of circulation Q of Control Circulation water coolant
0Poor Δ T with control high temperature circulation water and ambient air temperature
0, preferred Δ T
0=30 ℃～50 ℃.
(4) from Q
0(high temperature circulation water) distributes flow is Q
1High temperature circulation water introduce the high temperature side of membrane distillation device, the vapor pressure difference of utilizing high temperature circulation water to be produced in the hydrophobic microporous membrane both sides is ordered about water vapour and is seen through film from high temperature side and enter low temperature side.Low temperature side at hydrophobic microporous membrane is taked adequate measures, makes the steam coagulation that oozes out become pure water more than 30～40 ℃, and wherein quantity is P
1The production of pure water boiler of feeding use or for other purposes use, all the other quantity are P
2The pure water of (or steam water interface) is used for the pure water of replenishment cycles cooling water system because of vaporization losses.
(5) pure water P
1Directly boiler of feeding production is used, and also operation resupplies the boiler use after removing the suspended impurity that wherein may contain after filtration.
(6) the hydrophobic microporous membrane high temperature side is residual finally oozes Yu Shui B and is discharged as total salt discharge water of system.Soluble solid content among total salt discharge water B is equivalent to the summation of the soluble solid content in present de-salted water production blowdown and the recirculated cooling water blowdown.
(7), determine the cycles of concentration K of total salt discharge water B according to the water quality of fresh indusqtrial water supply and the economic technology requirement of hydrophobic microporous membrane operation
2
(8) P
1Determine according to power station water of productive use amount or other demand.
(9) P
2Vaporization losses water yield E by circulating cooling system
2, the recirculated cooling water cycles of concentration K that sets
1, total salt discharge water cycles of concentration K of setting
2Determine:
(10) because hydrophobic microporous membrane is isolated recirculated cooling water and blowdown, make the cycles of concentration of recirculated cooling water cycles of concentration and its blowdown can independent control.The cycles of concentration K of Control Circulation water coolant
1, make recirculated cooling water need not add Scale inhibitors.
(11) control mends the pure water amount P of recirculating cooling water system
2Can Control Circulation water coolant cycles of concentration, its method is:
(12) preferred high temperature circulation water Q
1Before entering the membrane distillation device, carry out pre-treatment.The purpose of pre-treatment mainly is the suspended contaminant of removing in the water.The method of pre-treatment can adopt coagulation-clarification (precipitation or air supporting)-filtration-sterilization, also can take other to have the water treatment method of similar functions.
Technology to the above-mentioned cleaner production mode of realization provided by the invention describes in conjunction with the accompanying drawings:
In the accompanying drawing, heavy line frame table showing device or associated plant, thick dotted line is represented hydrophobic microporous membrane, and fine line and arrow thereof are represented current and direction, and two-wire and arrow thereof are represented pure water, and literal that square frame is interior, square frame is other and line is other and numeral are for marking.
Recirculated cooling water moisturizing and power station water intaking from indusqtrial water supply all directly feed water cooling pond 1.From the low-temperature circulating water of water cooling pond 1, by be cooled object and become high temperature circulation water of heat exchanger 2 cooling.Part high temperature circulation water feeds pretreatment unit 3, and another part high temperature circulation water feeds heat exchanger 5.Pretreatment unit 3 is mainly used to remove the suspended solids pollutent in the recirculated water, and pretreatment unit 3 preferred coagulation-clarifications (precipitation or air supporting)-filtration-sterilization process combination also can be selected other combination of water technology with similar functions.The product water 31 of pretreatment unit 3 feeds the membrane distillation device.Membrane distillation device among the present invention comprises hydrophobic microporous membrane, removes also can comprise some other facility in addition.Hydrophobic microporous membrane among the present invention can be the product film of being made by PTFE, PVDF, PE, PP or analogous material on material, also can use the so-called asymmetry microporous membrane of making as polyethersulfone, polysulfones, polypropylene nitrile, polymeric amide etc.; Hydrophobic microporous membrane among the present invention in preferred hollow-fibre membrane or tubular membrane in shape, but also can adopt flat sheet membrane, rolled film or other shape film.Select the PTFE hollow-fibre membrane in the present embodiment for use, high-temperature water feeds in the film pipe, and Low Temperature Steam sees through tube wall and oozes out into out-tubular condensing and collection, and seepage remaining liquid is discharged in the film pipe and finally.Membrane distillation device in the technology of the present invention can only have one-level, but is preferably placed in-line multistage membrane distillation device, and every grade of membrane distillation device can comprise the hydrophobic micropore film unit of a plurality of parallel connections.Between adjacent two-stage membrane distillation device heat exchanger is set, is used for the seepage remaining liquid of prime membrane distillation device is heated, the thermal source of heat exchanger is from the high temperature circulation water in the system.Only express two-stage membrane distillation device among the embodiment as shown in drawings in the present invention, i.e. membrane distillation device 41 and membrane distillation device 42, and a heat exchanger 5 is set.Come the high temperature circulation water 22 of automatic heat-exchanger 2 heat exchanger 5 of flowing through, flow into cooling tower 6 after finishing heat exchange.High temperature circulation water 22 does not directly contact with seepage remaining liquid 411.The product water 31 of pretreatment unit 3 at first feeds membrane distillation device 41.The seepage remaining liquid of membrane distillation device 41 feeds membrane distillation device 42 then by heat exchanger 5 heating.The seepage remaining liquid 421 of membrane distillation device 42 is as blowdown.The pure water that multistage membrane distillation device is produced can be collected separately, also can mixed collection.In the present embodiment, membrane distillation device 41 and the 42 pure water mixed collections that produce, and offer power station and outer as required respectively for pure water, but the pure water 43 that wherein feeds water cooling pond is by metering P
2Control, P
2Can calculate by formula (1).The sewer of pretreatment unit 3 can mix with the sewer of membrane distillation device as final blowdown, also can discharge respectively.The sewer of pretreatment unit 3 mixes with the sewer of membrane distillation device as final sewer discharging in the present embodiment.
Expect desirable following major technique progress by the present invention:
A improves the recycling rate of waterused of water, reduces the water consumption, reduces water amount of blowdown
At present separately water intaking among the present invention, the power station water intaking E that processes and use1At first feed recirculating cooling water system, performance E1The refrigerating function that itself possesses, this function is existing Have in recirculated cooling water-power station water system and be wasted.
Because E1In cooling operations, be equivalent to disposable cooling water, when leaving recirculating cooling water system, carry certain heat H outside1 If the former circular flow Q of recirculating cooling water system00Remain unchanged, owing to increased E1As cooling water, by heat exchanger G0Cooling water inflow Q0For:
Q
0＝Q
00+E
1 (3)
Be located at and do not introduce E1Before, by heat exchanger G0Rear recirculated cooling water water temperature increases Δ t00, and the thermal capacitance h that establishes water is constant, then total heat-shift H0：
H
0＝Q
00Δt
00C (4)
Introducing E1After, water temperature increases Δ t0：
Obviously, Δ t0＜Δt
00, that is introducing E1The increasing extent of temperature of high temperature circulation water subtracts afterwards Little. If suppose E1＝0.3Q
00、Δt
00=40 ℃, according to Calculate and introduce E1Rear high temperature circulation water intensification Δ t0=30.7 ℃, than low 10 ℃ approximately of former intensifications, then the high temperature circulation cooling water is at cooling tower In the evaporation loss rate descend approximately 20%～30%, be equivalent to economized cycle water moisturizing 20%～30%. The heat exchanger G if the maintenance recirculated cooling water is flowed through0Speed constant, i.e. Q0＝Q
00, the water yield that then needs to cool off by cooling tower is with decline E1, the evaporation loss rate also will descend about 20 %～30%.
B obtains cheap pure water resource
At present the technology that adopts of industrial enterprise's Pure-water Making or desalted water mainly be ion-exchange, Counter-infiltration, electrodialysis or nanofiltration, these technologies all will consume a large amount of resources (chemicals, energy Amount), water producing cost is all higher. And utilize the used heat resource to adopt membrane distillation technique among the present invention Pure-water Making is compared almost not consumption, in addition film distillation worker with at present used process for preparing water The needed equipment of planting is very simple, so water producing cost will be very cheap, according to a preliminary estimate system The running cost of water is about about 0.1 yuan/ton.
Because the used heat resource is very abundant, make the pure water root by membrane distillation technique in the present invention Originally need not resemble and pursue utilization efficiency of heat energy the present membrane distillation technique, therefore to the film Distallation systm Equipment requirement very low. Suppose that the heat of producing pure water consumption per ton is equivalent to water is heated 10 ℃ (this thermal loss level is that normal film producing distilled water technology is at all unallowed), and The difference of supposing present recirculated cooling water system high-temperature recirculated water and ambient air temperature is 30 ℃, then The used heat resource that has is enough to produce 3 times to the warm pure water (30 ℃～40 of the circulating cooling water yield ℃), considerably beyond the demand of half industrial enterprise to power station water supply. Therefore, utilize this Bright, the enterprise with a large amount of used heat resources can produce a large amount of outer pure water that supplies.
C reclaims the used heat resource, cuts down the boiler for producing fuel cost
The pure water temperature of obtaining by method of the present invention will about 40 ℃, be equivalent to supply with The water of boiler preheats 20 ℃～30 ℃, will significantly cut down the fuel cost of boiler for producing, economy Meaning and social effect are very remarkable.
D need not add antisludging agent in recirculated cooling water
By the present invention the cycles of concentration of recirculated cooling water and blowdown can be controlled respectively. Utilize Used heat can be realized the spontaneous concentrated blowdown of recirculated cooling water by membrane distillation technique, therefore can with Recirculated cooling water is controlled in the cycles of concentration that need not add antisludging agent, thereby saves medicament expense And reduction is to the pollution of environment.
Claims (10)
1. recirculated cooling water and power station waterworks cleaner production mode in the process water mainly comprise:
---improve the repeating utilization factor of water, reduce the water consumption, reduce blowdown,
---obtain cheap pure water,
---reclaim the used heat in the high temperature circulation water coolant, cut down the boiler for producing fuel cost,
---need not add Scale inhibitors in the recirculated cooling water,
It is characterized in that: the water intaking E that power station is used to produce de-mineralized water, softening water or pure water
1Feed recirculating cooling water system earlier, preferably power station be used to produce the first water cooling pond that all feeds circulating cooling system of water intaking E1 of de-mineralized water, softening water or pure water,
Cryogenic recirculated cooling water is by interchanger G
0Become high temperature circulation water, the speed of circulation Q of Control Circulation water coolant after cooling off the object that is cooled
0Poor Δ T with control high temperature circulation water and ambient air temperature
0,
Setting comprises that the pure water of membrane distillation device produces and water treatment technological process, from Q
0In tell a part of high temperature circulation water Q
1Produce pure water and waste discharge by said system water and water treatment technological process, wherein quantity is P
1The production of pure water boiler of feeding use or for other purposes use, all the other quantity are P
2The pure water of (or steam water interface) is used for the pure water of replenishment cycles cooling water system because of vaporization losses,
From high temperature circulation water, introduce high temperature circulation water Q
2By interchanger G
2Water Q to membrane distillation device high temperature side
1Heating makes the poor Δ T of itself and ambient air temperature
1Remain on more than 5 ℃ Q
2With Q
1Not directly contact,
Pure water P
1Directly boiler of feeding production is used, and also operation resupplies the boiler use after removing the suspended impurity that wherein may contain after filtration,
Membrane distillation device high temperature side is residual finally oozes Yu Shui B and is discharged as total salt discharge water of system, and according to the water quality of fresh indusqtrial water supply and the economic technology requirement of hydrophobic microporous membrane operation, determines the cycles of concentration K of total salt discharge water B
2,
P
2Vaporization losses water yield E by circulating cooling system
2, the recirculated cooling water cycles of concentration K that sets
1, total salt discharge water cycles of concentration K of setting
2Determine:
The cycles of concentration K of Control Circulation water coolant
1, make recirculated cooling water need not add Scale inhibitors, control mends the pure water amount P of recirculating cooling water system
2Can Control Circulation water coolant cycles of concentration, its method is:
2. as the poor Δ T of said high temperature circulation water of claim 1 and ambient air temperature
0, it is characterized in that: preferred Δ T
0=30 ℃～50 ℃.
3. as the said temperature head Δ of claim 1 T
1, it is characterized in that: preferred Δ T
1＞20 ℃.
4. as the said high temperature circulation water of claim 1 Q
1, it is characterized in that: before entering the membrane distillation device, carry out pre-treatment to remove suspended contaminant and the disinfection in dewatering.
5. as the right 1 said pure water of producing, it is characterized in that: made pure water temperature be controlled at 30 ℃～more than 40 ℃.
6. technology that realizes recirculated cooling water and power station waterworks cleaner production mode in the process water, content comprises:
---reclaim used heat,
---produce pure water,
---water is handled,
---obtain blowdown,
It is characterized in that: comprise water cooling pond 1 in the technical process, be used to cool off be cooled heat exchanger 2, pretreatment unit 3, membrane distillation device 4, heat exchanger 5, the cooling tower 6 of object, recirculated cooling water moisturizing and power station water intaking from indusqtrial water supply all directly feed water cooling pond 1, from the low-temperature circulating water of water cooling pond 1 by be cooled object and become high temperature circulation water of heat exchanger 2 coolings
Part high temperature circulation water feeds the processing that pretreatment unit 3 is mainly removed suspended contaminant and sterilization and disinfection,
Another part high temperature circulation water feeds heat exchanger 5, and the Yu Shui that oozes in the membrane distillation device 4 is being heated back inflow cooling tower 6,
The product water of pretreatment unit 3 feeds membrane distillation device 4, membrane distillation device 4 pure water that produces part Returning water pond 1, and all the other use for the power station boiler or the outer pure water that supplies of conduct,
The sewer of pretreatment unit 3 and membrane distillation device 4 ooze the total sewer of Yu Shui as system.
7. as the said pretreatment unit 3 of claim 6, it is characterized in that: preferred coagulation-clarification (precipitation or air supporting)-filtration-sterilization process combination, also can select other combination of water technology with similar functions.
8. as the said membrane distillation device of claim 6, it is characterized in that: comprise hydrophobic microporous membrane, hydrophobic microporous membrane can be the product film of being made by PTFE, PVDF, PE, PP or analogous material on material, also can use the so-called asymmetry microporous membrane of making as polyethersulfone, polysulfones, polypropylene nitrile, polymeric amide etc., in preferred hollow-fibre membrane or tubular membrane in shape, but also can adopt flat sheet membrane, rolled film or other shape film.
9. as claim 6 and the said membrane distillation device of claim 8, it is characterized in that: be preferably placed in-line multistage membrane distillation device, every grade of membrane distillation device can comprise the hydrophobic micropore film unit of a plurality of parallel connections, upper level membrane distillation device ooze the water inlet of Yu Shui as next stage membrane distillation device, between adjacent two-stage membrane distillation device, heat exchanger is set, be used for the Yu Shui that oozes of upper level level membrane distillation device is heated, the thermal source of heat exchanger is from the high temperature circulation water in the system.
10. as claim 6 and the said membrane distillation device of claim 9, it is characterized in that: if adopt placed in-line multistage membrane distillation device, the pure water that every grade of membrane distillation device is produced can be collected separately also and can collect according to different combined hybrid, and the seepage remaining liquid of last step membrane distillation device is as sewer.
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101822922A (en) * | 2009-03-06 | 2010-09-08 | 北京科净源科技股份有限公司 | Cooling circulating water double pollution discharge treatment method |
| CN102173469A (en) * | 2010-12-31 | 2011-09-07 | 上海多佳水处理科技有限公司 | Circulating cooling water system and operation method thereof |
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| CN101493291B (en) * | 2008-01-24 | 2011-12-07 | 仁新节能环保设备(上海)有限公司 | Waste water heat energy recovery system |
| CN101493292B (en) * | 2008-01-24 | 2012-02-01 | 仁新节能环保设备(上海)有限公司 | Sewerage heat energy recovery system |
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| CN101822922A (en) * | 2009-03-06 | 2010-09-08 | 北京科净源科技股份有限公司 | Cooling circulating water double pollution discharge treatment method |
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| CN102381786A (en) * | 2011-11-19 | 2012-03-21 | 董兆祥 | Zero-discharge treatment system for industrial circulating water |
| CN104150571A (en) * | 2013-05-14 | 2014-11-19 | 中国石油化工股份有限公司 | Circulation method of cooling water |
| CN104150571B (en) * | 2013-05-14 | 2016-04-27 | 中国石油化工股份有限公司 | A kind of circulation means of water coolant |
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| CN104538223A (en) * | 2015-01-04 | 2015-04-22 | 沈阳华德海泰电子有限公司 | Self-cleaning vacuum switch tube high-pressure aging system |
| CN106242083A (en) * | 2016-08-23 | 2016-12-21 | 赵爱 | Recirculated cooling water scaler system |
| CN106698774A (en) * | 2017-01-24 | 2017-05-24 | 汪传发 | Ultrahigh-concentration-multiple circulating cooling water treatment system and circulating cooling water treatment method |
| CN111649615A (en) * | 2020-05-29 | 2020-09-11 | 鞍钢股份有限公司 | Method for determining leakage rate of circulating system through concentration ratio when impurities are removed |
| CN111664634A (en) * | 2020-05-29 | 2020-09-15 | 鞍钢股份有限公司 | Method for determining circulation system pollution discharge rate through concentration ratio when impurities are removed |
| CN111664633A (en) * | 2020-05-29 | 2020-09-15 | 鞍钢股份有限公司 | Method for determining leakage rate of circulating water cooling system through concentration ratio |
| CN111649615B (en) * | 2020-05-29 | 2021-07-20 | 鞍钢股份有限公司 | Method for determining leakage rate of circulating system through concentration ratio when impurities are removed |
| CN111664634B (en) * | 2020-05-29 | 2021-07-20 | 鞍钢股份有限公司 | Method for determining circulation system pollution discharge rate through concentration ratio when impurities are removed |
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