CN100378013C - Condensed water treatment system - Google Patents
Condensed water treatment system Download PDFInfo
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- CN100378013C CN100378013C CNB2006100660064A CN200610066006A CN100378013C CN 100378013 C CN100378013 C CN 100378013C CN B2006100660064 A CNB2006100660064 A CN B2006100660064A CN 200610066006 A CN200610066006 A CN 200610066006A CN 100378013 C CN100378013 C CN 100378013C
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Abstract
The present invention relates to a condensed water treatment system which comprises a raw water tank, at least one microfilter, at least one fiber adsorbing tank, a clear water tank, an online water quality discriminating system, a distributed control system, a pipeline and a valve. The present invention is characterized in that condensed water is treated without dropping to the normal temperature, oil, high-valence metallic ions and particulates in the condensed water are removed, the temperature of the treated condensed water entering the clear water tank is not lower than 85 DEG C, and the system is regenerated by steam of which the temperature is from 160 DEG C to 250 DEG C by a semi-regenerating method. The present invention also relates to a condensed water treatment method based on the system.
Description
Technical field
The present invention relates to a kind of condensate polishing system, particularly relate to not reduce to the system of removing oil, high volence metal ion and particulate matter in the condensed water under the condition of normal temperature, the invention still further relates to condensed water treatment process based on this system in condensed water.
Background technology
In order to make full use of the energy and water resources, condensed water is recycled and more and more is subject to people's attention, and is widely used in a lot of fields.But, containing oil, various high volence metal ion and particulate matter etc. in the condensed water usually, could use after needing to handle.
So-called oil refers to hydro carbons and derivative thereof in this article, and it generally has four kinds of existence forms in water: free state oil, mechanical dispersion attitude oil, oil in water emulsion, dissolving oil.The harm of oil shows as in the condensed water: oil will be decomposed the very low dirt settling of generation thermal conductivity attached on the tube wall when being heated, have a strong impact on the heat transfer of tube wall, causes the tube wall metal deformation, jeopardizes boiler tube safety; Oil in the feedwater can make stove water form foam and very easily generate the grain slag of water float, impels the deterioration of steam water quality; Oil foam water droplet can be by vapor zone in superheater, and decomposes produces the very low dirt settling of thermal conductivity, causes the mistake cause thermal damage of superheater tube.High volence metal ions such as the iron in the oiler feed, copper generally derive from condensed water, supplementary feed and water of productive use system, and they are as one of foundation of estimating therrmodynamic system metallic corrosion degree.When containing metal ion such as iron and copper in the oiler feed, can cause following harm to boiler and piping system: form iron dirt and copper dirt on metal heated, cause the local corrosion of metal, this corrosion generally is a pitting corrosion, causes metal piercing or explosion easily; The corrosion of metal product is taken to by steam in the follow-up gas utilization units such as steam turbine, causes steam turbine, superheater salification, has a strong impact on safety and economic operation.Particulate matter may deposit in pipeline or equipment and cause obstruction in the condensed water, thereby causes pipeline or equipment failure and cause safety problem.
The condensed water treatment technology has at present: gravity oil-removing, gravity settling can isolating oil droplet minimum diameter have a limit, therefore very little for diameter, as to be the stable distribution of emulsified state oil-water mixture, gravity settling is helpless, and this kind method is applicable to the bigger situation of oil-contg in the water; Gac, coke oil removing, gac has macropore, mesopore and micropore, and what work mainly is micropore, because its aperture is little and occupy nexine, thereby is difficult to regeneration; The high-density fiber oil removing, because operation under high pressure, fiber is rapidly aging, the life-span is short, and high-voltage operation is dangerous, has potential safety hazard; The fibrous nodules oil removing because its aperture is big, is therefore filtered coarsely relatively, and it is big to handle in the water of back oil-contg, and regeneration needs increase intractability with oil; Class extraction oil removing, this method long-time running does not have regeneration system rapidly, and the oil pollution resin influences adsorption effect; The precoat filter deironing, because of the shop film can not guarantee absolute evenly, thereby filter effect instability, and used resin can not regenerate and must discard, so running cost height; Ion-exchange-resin process, the ion exchange resin non-refractory, operation and regeneration are complicated, the cost height; Electromagnetic filter, the oil that contains in the condensed water can be difficult to remove attached on the magnetic fillers such as steel wool, influences treatment effect, and non-refractory etc.
By on can see the secondary pollution that has the condensed water treatment technology and exist weak effect, non-refractory, cooling to cause, have problems such as potential safety hazard, cost height, operation and regeneration difficulty.
At the problems referred to above, the present inventor has invented a kind of condensate polishing system and has successfully solved the problems referred to above, makes condensed water after the processing reach the water inlet standard of boiler.
Summary of the invention
The object of the present invention is to provide a kind of condensate polishing system, this system comprises: raw water box, at least one microfilter, at least one fiber adsorption tanks, clear water tanks, online water quality discrimination system, DCS distributed control system, pipeline and valve, it is characterized in that: do not reduce in condensed water under the condition of normal temperature and handle, remove oil, high volence metal ion and particulate matter in the condensed water, temperature 〉=85 of the condensed water that enters described clear water tanks after the processing ℃.
According to the present invention, microfilter comprises the refractory ceramics filtering element, and filtering element is that inside has micropore, and through chemical substance treatment, is forming film in crossing micropore, is a kind of filter type that absorption, surface filtration, Depth Filtration combine.
According to the present invention, the chemical substance of handling microfilter is selected from the set that contains isothiazolinone 5-chloro-2-methyl-4-isothiazoline-3-ketone (CIT), 2-methyl-4-isothiazoline-3-ketone (MIT), ethylene glycol monostearate, ethylene glycol phenyl ether or sodium lauryl sulphate or its arbitrary combination etc.
Half renovation process of microfilter also is provided according to the present invention, microfilter is oppositely cleaned, so that microfilter is regenerated with 160-250 ℃ steam.
According to the present invention, two microfilters preferably are provided at least, when a microfilter carried out regenerated, all the other microfilters worked on, and the fiber adsorption tanks are supplied water.
According to the present invention, the fiber adsorption tanks comprise the carbon fiber absorption felt as main filtering element, and described carbon fiber absorption felt has the intensive and characteristics such as specific surface area is huge, high adsorption capacity of pore structure, and its specific surface area is at least 1400m
2/ g, phenenyl absorbing amount 〉=60wt%, iodine absorption value 〉=1500mg/g, and have functional group through chemical substance treatment, different chemical substances can be selected according to the different quality situation of condensed water by these functional groups.
According to the present invention, the chemical substance of Treatment of Carbon absorption felt is selected from the set that contains cetyl trimethylammonium bromide, Brij, amphoteric imidazoline, fatty alcohol-polyoxyethylene ether or alkylphenol polyoxyethylene or its arbitrary combination etc.
Half renovation process of fiber adsorption tanks also is provided according to the present invention, the fiber adsorption tanks is oppositely cleaned, so that the fiber adsorption tanks are regenerated with 160-250 ℃ steam.
According to the present invention, two fiber cans preferably are provided at least, when fiber adsorption tanks carried out regenerated, its cofibre adsorption tanks continued works better.
According to the present invention, online water quality discrimination system mainly is made up of probe, cable, signal wire and industrial computer, and the fuzzy control platform program is housed in the industrial computer, and each probe moves under this time variable control.Each unit all can be controlled automatically according to running condition separately, and is sensitive reliable.Probe is used for detected temperatures, pressure, flow, oil, high volence metal ion content, hardness, pH value and specific conductivity etc.
According to the present invention, high volence metal ion specifically comprises Fe
2+, Fe
3+, Cu
2+, Mg
2+, Ca
2+, Al
3+, Cr
3+, Mn
2+, Mn
4+, Zn
2+, Ni
2+Deng.
According to the present invention, preferably at least described probe is being installed on the raw water box outlet conduit and on the fiber adsorption tanks outlet conduit.
According to the present invention, the DCS distributed control system comprises that having hydrogen leads fuzzy control platform and the reliable DCS Controlling System that the online electricity of synergy (ion exchange column protection) is led detection system, simulation artificial intelligence.
The present invention also provides a kind of condensed water treatment process based on this system, comprises the following steps: I, condensed water in high temperature is introduced described raw water box carries out preliminary treatment; Condensed water after II, the processing is through described online water quality discrimination system and the check and analysis of described DCS distributed control system, and is defective after pipeline is discharged system, perhaps qualified after pipeline enters described microfilter, carries out adsorption filtration and handles; Condensed water after III, the processing enters described fiber adsorption tanks by pipeline; Carrying out adsorption filtration handles; Condensed water after IV, the processing is through described online water quality discrimination system and the check and analysis of described DCS distributed control system, it is qualified after pipeline enters described clear water tanks, perhaps defective after pipeline enters described microfilter again, repetitive process II, III, IV are qualified until detecting.
The present invention uses the adsorption of hyperfiltration and carbon fiber reinforce plastic, can effectively remove the various oil that are in emulsification attitude, solubilised state in the condensed water.Simultaneously hyperfiltration film and carbon fiber reinforce plastic under the effect with functional group, remove the high volence metal ion in the water, make oil, iron, hardness equal size reach the boiler feed water requirement.Device adopts 160-250 ℃ steam pulse cleaning, and regeneration is easy and cost is low.Therefore select high temperature resistant filtering element for use, under condensed water is not reduced to the condition of normal temperature, just can not handle, avoided secondary pollution, reclaimed heat.Adopt DCS Controlling System and online discrimination system, device can clean trapped substance automatically by detecting index, need not manual operation, and simple and convenient management has guaranteed safety, has reduced labour intensity.
Description of drawings
Fig. 1 is a condensate polishing system synoptic diagram of the present invention;
Fig. 2 is a raw water box structural representation of the present invention; With
Fig. 3 is the regeneration schematic flow sheet of microfilter of the present invention and fiber adsorption tanks.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.Identical reference numbers is represented identical structural element in the accompanying drawing.
Fig. 1 is a condensate polishing system synoptic diagram according to an embodiment of the invention.In the drawings, the 101st, raw water box, the 201st, microfilter, the 301st, fiber adsorption tanks, the 401st, clear water tanks, the 501st, online water quality discrimination system, the 601st, DCS distributed control system, the 701st, raw water box output channel, the 702nd, fiber adsorption tanks output channel, the 703rd, clear water tanks input channel, the 704th, defective water Returning pipe and 801 is magnetic valves.
Fig. 2 is raw water box 101 structural representations.In the drawings, the 102nd, water-distributing device, the 103rd, overflow weir.
Condensed water in high temperature at first enters raw water box 101, and raw water box 101 also can be described as water-and-oil separator.Condensed water enters raw water box from water-distributing device 102, and water-distributing device 102 has two effects: the one, make that into water is uniform; The 2nd, the turbulent velocity of reduction water prolongs the effective residence time of condensed water in raw water box, makes free state and the easier and water sepn of mechanical dispersion attitude oil; Overflow weir 103 utilizes the physics settlement action then, and most of free state and mechanical dispersion attitude oil are removed, and makes that oil-contg drops to below the 50ppm in the water.
Be higher than and exceed when setting up standard when condensed water in pipeline 701 detects index, the probe of online examination Controlling System 501 will detect in the several seconds, and convert electrical signal rapidly to, command control system switches the former water of severe contamination and goes out system, improve the shock resistance of device, guaranteed the safety of device.Can determine the type of arrangement, number, position of probe and the value of setting up standard that line is screened Controlling System etc. according to practical situation.
Condensed water flows into microfilter 201 again behind piping 701, be that three microfilters 201 are connected in parallel among Fig. 1, also can come to determine number, mode of connection of microfilter 201 etc. as required.Microfilter 201 comprises the refractory ceramics filtering element, there is micropore filtering element inside, and through chemical treatment, in crossing micropore, form film, be a kind of filter type that absorption, surface filtration, Depth Filtration combine, filtration mechanism mainly is complexing, inertial collision, spread and hold back etc.Through behind the microfilter 201, can disposablely hold back whole particulates of particle diameter Φ 〉=0.1 μ m, hold back at least 95% colloidal particle (0.001≤Φ≤0.1 μ m), hold back at least 90% high volence metal ion, for example Fe
2+, Fe
3+, Cu
2+, Mg
2+, Ca
2+, Al
3+, Cr
3+, Mn
2+, Mn
4+, Zn
2+, Ni
2+Plasma, and remove mechanical dispersed oil and part oil in water emulsion makes that oil-contg is brought down below 6ppm in the water.
After microfilter 201 was handled, condensed water flowed into fiber adsorption tanks 301, is that three fiber adsorption tanks 301 are connected in parallel among Fig. 1, can come to determine the number, mode of connection of fiber adsorption tanks 301 etc. as required.The fiber adsorption tanks belong to the secondary filter device, and main filtering element is the fiber absorption felt that has a large amount of functional groups.Behind fiber adsorption tanks 301, can remove remaining oil and high volence metal ion, oil-contg is reduced to below the 1ppm, total iron content is brought down below 50 μ g/l.
The condensed water pipeline 702 of behind fiber adsorption tanks 301, discharging and flow through, pipeline 702 is provided with the probe of online discrimination system 501, detect the water quality of handling the back condensed water, meet the expection standard as water quality, then thereby condensed water enters clear water tanks 401 through magnetic valve 801 flow ipes 703, do not meet the expection standard as water quality, thereby then condensed water enters microfilter 201 again through magnetic valve 801 flow ipes 704 and handles, so circulation is qualified up to water quality.Can determine the type of arrangement, number, position of probe and the value of setting up standard that line is screened Controlling System etc. according to practical situation.
Following table 1 is the boiler feed water part index number, table 2 be in the one embodiment of the invention after treatment system of the present invention is handled some indexs of condensed water.
Table 1
| The oiler feed index | Dissolved oxygen | Iron | Copper | Oil |
| Unit | μg/l | μg/l | μg/l | mg/l |
| Medium pressure furnace is given water quality standard | ≤15 | ≤50 | ≤10 | ＜1.0 |
| Pressure furnace is given water quality standard | ≤7 | ≤30 | ≤5 | ＜0.3 |
Table 2
| Index | Total iron content | Hardness | Oil-contg | Chemical oxygen demand (COD) (COD) | Temperature |
| Unit | mg/l | μmol/l | mg/l | mg/l | ℃ |
| Before the system handles of the present invention | 2 | 50 | 80 | 50 | 120 |
| After the system handles of the present invention | 0.02 | 0 | 0.2 | ≤2 | 90 |
From table 1 and 2, can find out, condensate polishing system treatment effect highly significant of the present invention, the water inlet standard of pressure and high-duty boiler during indexs such as total iron and oil-contg satisfy in the condensed water, and the temperature road of handling the back condensed water is up to 90 ℃, the processing that this has saved energy and has helped condensed water.
Fig. 3 is the regeneration schematic flow sheet of microfilter of the present invention and fiber adsorption tanks.In the drawings, the 101st, raw water box, the 201st, microfilter, the 301st, fiber adsorption tanks, the 401st, clear water tanks, 802,803,804,805,806,807,808,809,810,811,812,813,814 and 815 is stopping valve.
During to microfilter 201 regeneration, stopping valve 802,804,810 and 814 is opened, and stopping valve 803,805,808,809 and 815 is closed, and 160-250 ℃ steam enters microfilter 201 as shown in the figure, carry out reverse cleaning and regeneration, purge flow is discharged as described in Figure.Regeneration in general 24 hours once also can come to decide as the case may be.When cleaning, other element can normally be worked.
During to 301 regeneration of fiber adsorption tanks, stopping valve 802,803,814 and 815 is opened, and stopping valve 806,810 and 813 is closed, and 160-250 ℃ steam enters fiber adsorption tanks 301 as shown in the figure, carries out reverse cleaning and regeneration, and purge flow is discharged as described in Figure.Regeneration in general 24 hours once also can come to decide as the case may be.When cleaning, other element can normally be worked.
Equally, can regenerate simultaneously microfilter 201 and fiber adsorption tanks 301, this moment, stopping valve 802,803,804,810,814 and 815 was opened, and stopping valve 805,808,809,813 and 815 is closed.Can regenerate to other microfilter 201 and/or fiber adsorption tanks 301 according to same principle.
In sum, that condensate polishing system of the present invention has is high temperature resistant, save heat energy, avoid secondary pollution, the device combination flexibly, characteristics such as treatment effect is good, safe, easy to operate, make the utilization of condensed water safer, the economically feasible that becomes.
Though described the disclosure of invention by explanation and embodiment, but should be appreciated that, above-mentioned explanation and embodiment only are illustrative and nonrestrictive, to those skilled in the art, can make many other modification, variation and arrangement and without departing from the spirit and scope of the present invention.
Claims (8)
1. condensate polishing system, comprise raw water box, at least one microfilter, at least one fiber adsorption tanks, clear water tanks, online water quality discrimination system, distributed control system, pipeline and valve, it is characterized in that: do not reduce in condensed water under the condition of normal temperature and handle, remove the oil in the condensed water, high volence metal ion and particulate matter, enter condensing water temperature 〉=85 ℃ of described clear water tanks after the processing, wherein said microfilter comprises high temperature resistant and process is selected from isothiazolinone, 5-chloro-2-methyl-4-isothiazoline-3-ketone, 2-methyl-4-isothiazoline-3-ketone, ethylene glycol monostearate, ethylene glycol phenyl ether or sodium lauryl sulphate, or the ceramic filter element of the chemical substance treatment of its arbitrary combination, described fiber adsorption tanks comprise through being selected from cetyl trimethylammonium bromide, Brij, amphoteric imidazoline, fatty alcohol-polyoxyethylene ether or alkylphenol polyoxyethylene, or the carbon fiber of the chemical substance treatment of its arbitrary combination absorption felt.
2. condensate polishing system according to claim 1 is characterized in that, described carbon fiber absorption felt specific surface area 〉=1400m
2/ g, phenenyl absorbing amount 〉=60wt%, iodine absorption value 〉=1500mg/g.
3. according to any described condensate polishing system in the aforementioned claim, it is characterized in that, described microfilter and/or fiber adsorption tanks adopt the regeneration of half regenerated method, with 160-250 ℃ steam described microfilter and/or fiber adsorption tanks are carried out reverse cleaning and regeneration.
4. condensate polishing system according to claim 1, it is characterized in that, described online water quality discrimination system is made up of probe, cable, signal wire and industrial computer, and described probe detects index and comprises temperature, pressure, flow, oil, high volence metal ion content, hardness, pH value and specific conductivity.
5. condensate polishing system according to claim 1 is characterized in that described high volence metal ion comprises Fe
2+, Fe
3+, Cu
2+, Mg
2+, Ca
2+, Al
3+, Cr
3+, Mn
2+, Mn
4+, Zn
2+, Ni
2+
6. condensate polishing system according to claim 1 is characterized in that, described probe is installed on described raw water box outlet conduit and described fiber adsorption tanks outlet conduit at least.
7. condensate polishing system according to claim 1 is characterized in that, described distributed control system comprises that having hydrogen leads fuzzy control platform and the reliable Controlling System that the online electricity of synergic is led detection system, simulation artificial intelligence.
8. condensed water treatment process based on the described condensate polishing system of claim 1 comprises step: I, condensed water in high temperature is introduced described raw water box carry out preliminary oil removal treatment; Condensed water after II, the processing is through described online water quality discrimination system and described distributed control system check and analysis, and is defective after pipeline is discharged system, perhaps qualified after pipeline enters described microfilter, carries out adsorption filtration and handles; Condensed water after III, the processing enters described fiber adsorption tanks by pipeline; Carrying out adsorption filtration handles; Condensed water after IV, the processing is through described online water quality discrimination system and described distributed control system check and analysis, it is qualified after pipeline enters described clear water tanks, it is perhaps defective after pipeline enters described microfilter again, repetitive process II, III, IV are qualified until check and analysis, enter described clear water tanks then.
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| CNB2006100660064A CN100378013C (en) | 2006-03-21 | 2006-03-21 | Condensed water treatment system |
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| CNB2006100660064A CN100378013C (en) | 2006-03-21 | 2006-03-21 | Condensed water treatment system |
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| CN100378013C true CN100378013C (en) | 2008-04-02 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787907B (en) * | 2010-01-29 | 2014-01-15 | 王世英 | Steam condensate water recycling and working system and method thereof |
| CN102466272A (en) * | 2010-11-15 | 2012-05-23 | 北京上元恒通环保科技有限公司 | Novel water-saving system of energy-saving heat exchanger |
| CN102351338B (en) * | 2011-06-09 | 2013-06-26 | 威海正大水务设备科技有限公司 | Advanced treating system for drinking tap water and water quality treating method |
| CN102826703B (en) * | 2012-09-17 | 2013-09-18 | 曹式芳 | Steam condensed water recovery and deoiling deionizing purification treatment system |
| CN103964518A (en) * | 2014-05-17 | 2014-08-06 | 济南华闻节能工程技术有限公司 | High-temperature condensed water precision-processing device |
| CN108569756B (en) * | 2017-03-09 | 2021-10-19 | 大连安能杰科技有限公司 | New intelligent sewage treatment process control method (EBIS) |
| CN110980822A (en) * | 2019-11-20 | 2020-04-10 | 中国能源建设集团西北电力试验研究院有限公司 | Automatic cleaning system for powder resin covered filter and program control method |
| CN112299517B (en) * | 2020-10-23 | 2023-05-05 | 安徽省农业科学院棉花研究所 | Multi-stage recovery equipment for cotton fibers |
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| DE2545192A1 (en) * | 1974-10-11 | 1976-04-22 | Exxon Research Engineering Co | FLIPPED BED AND METHOD FOR STABILIZING A FLIPPED BED |
| US5468395A (en) * | 1992-02-24 | 1995-11-21 | C.O.G.I.A. Societe Anonyme | Process and apparatus for demineralizing water |
| US5928582A (en) * | 1996-03-19 | 1999-07-27 | Xenon Research, Inc. | Microporous membranes, method of manufacture |
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2006
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2545192A1 (en) * | 1974-10-11 | 1976-04-22 | Exxon Research Engineering Co | FLIPPED BED AND METHOD FOR STABILIZING A FLIPPED BED |
| US5468395A (en) * | 1992-02-24 | 1995-11-21 | C.O.G.I.A. Societe Anonyme | Process and apparatus for demineralizing water |
| US5928582A (en) * | 1996-03-19 | 1999-07-27 | Xenon Research, Inc. | Microporous membranes, method of manufacture |
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Date of cancellation: 20160824 Granted publication date: 20080402 Pledgee: Bank of Beijing Zhongguancun branch, Limited by Share Ltd, Haidian Pledgor: Yang Yucheng Registration number: 2015990000448 |
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Denomination of invention: Condensate water processing system using permanent magnetic deironing filters, and designing method thereof Effective date of registration: 20160831 Granted publication date: 20080402 Pledgee: Bank of Beijing Zhongguancun branch, Limited by Share Ltd, Haidian Pledgor: Yang Yucheng Registration number: 2016990000756 |
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