CN104147932A - Normal-pressure pollution and plugging resistant energy-saving membrane distiller - Google Patents
Normal-pressure pollution and plugging resistant energy-saving membrane distiller Download PDFInfo
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- CN104147932A CN104147932A CN201410405138.XA CN201410405138A CN104147932A CN 104147932 A CN104147932 A CN 104147932A CN 201410405138 A CN201410405138 A CN 201410405138A CN 104147932 A CN104147932 A CN 104147932A
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- storehouse
- cold liquid
- hydrothermal solution
- bin
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
The invention relates to a normal-pressure pollution and plugging resistant energy-saving membrane distiller. Cold liquid bins comprise a cold liquid bin a and a cold liquid bin b connected with the cold liquid bin a through condenser tubes, a purified water bin is positioned rightly below a hot liquid bin, the cold liquid a is positioned over the hot liquid bin, the cold liquid bin b is positioned rightly below the purified water bin, and the condenser tubes transverse through the hot liquid bin and the purified water bin; PTFE micro-porous tube membranes are arranged around the condenser tubes in the hot liquid bin, and circular channels are formed between the PEFE micro-porous tubes and the condenser tubes respectively; the purified water bin is connected with the circular channels; a heated processed steam-water mixed liquid enters the hot liquid bin; and a normal temperature cooling liquid is sent to the cold liquid bin a, goes through the condenser tubes, enters the cold liquid bin b and flows out, water steam in the hot liquid bin permeates the PTFE micro-porous tube membranes under mass transfer driving force formed due to a temperature difference, contacts with the condenser tubes, and is condensed to form liquid purified water, and the purified water flows into the purified water bin through the circular channels. The normal-pressure pollution and plugging resistant energy-saving membrane distiller has the advantages of high heat recovery rate, high desalting efficiency and wide application range.
Description
Technical field:
The present invention relates to water treatment facilities field, relate in particular the stifled energy-saving film distiller of a kind of normal pressure anti-soil.
Background technology:
Film distillation is a kind of of low temperature distillation technology, is the innovation based on conventional film isolation technics.Reverse osmosis membrane technology replaces traditional ion-exchange, electrodialysis desalination technology gradually at present, become the one preferred technique of pure water manufacture, city, industrial wastewater pollution degree of depth Treatment for Reuse, but the theoretical producing water ratio of reverse osmosis membrane technology only has 75%, reality is 60% left and right only, desalination is only limited to below 8%, and energy consumption is higher.Counter-infiltration is discharged dense water treatment and is mainly contained following three kinds of schemes: (1) dense water discharges after rinsing more medium filter; (2) discharge water centralized recovery is processed, utilized the removal calcium magnesium hardnesses such as lime softening method, recycling or qualified discharge after processing; (3) directly in conjunction with production technology situation, fully utilize.But these methods are not all thoroughly dealt with problems, very low to the utilization rate of dense water, even cause the secondary pollution to environment.Because cryogenic film distillation technique is in separation process, only there is steam can see through hydrophobic fenestra, therefore the water quality producing is very pure, higher than reverse osmosis water outlet water quality, salinity and concentration polarization are compared insignificant on film distillation impact with counter-infiltration, can process the aqueous solution of high concentration inorganic salts, even solution can be concentrated to hypersaturated state.Film distillation desalination producing water ratio can reach 100% in theory, and far above 75% of counter-infiltration, this is that existing all desalination treatment technology institute is inaccessiable.
On a large amount of film distillation research and experiment basis, developed four kinds of different film distillation procedure modes at present for many years, comprised direct contact membrane distillation, gap membrane distillation, the distillation of gas flow purging formula film and the distillation of vacuum type film.Wherein contact method is the steam that sees through perforated membrane directly to be entered to pure water at cold side carry out condensation, so condensation process is integrated in membrane module, operate relatively simply, is therefore that studied maximum a kind of film distills mode.Yet compare with other mode of operation, directly contact membranes distillation can cause more thermal loss and comparatively serious temperature difference polarization; Vacuum type film distillation rule is to apply a negative pressure through side, and the water vapour that sees through perforated membrane is retracted in membrane module condenser in addition and carries out condensation liquefaction.The advantage of this process is that thermal loss is all less than other three kinds of film distillation procedure methods, and distillating ventilating amount is higher, but the pressure that the negative pressure applying enters fenestra lower than liquid can cause that fenestra humidifying, membrane material are subject to great impact in the environmental longevity of negative pressure for a long time.At present all there is moisture film hydrophiling leakage problems in existing above four kinds of films distillation modes, the blocking microporous film of solute substance fouling, some problems such as energy consumption is high simultaneously, efficiency is low, reliability is low.Therefore studying the long film distillation technology of new can anti-soil stifled, low energy consumption, life-span by for important, is to reduce investment and operating cost, reduces the inevitable choice that concentrated water discharge moves towards the industrialization and uses.
Summary of the invention:
The object of the invention is for the deficiencies in the prior art part, provide a kind of normal pressure anti-soil to block up energy-saving film distiller, anti-soil is stifled, can effectively carry out heat recovery, PTFE microporous tube membrane long service life.
Technology solution of the present invention is as follows:
A kind of normal pressure anti-soil blocks up energy-saving film distiller, comprise cold liquid storehouse, hydrothermal solution storehouse and clean water sump, described cold liquid storehouse, hydrothermal solution storehouse and clean water sump are respectively circular cylindrical shell body structure, described clean water sump be positioned at hydrothermal solution storehouse under, described cold liquid storehouse has two, for cold liquid storehouse a and cold liquid storehouse b, cold liquid storehouse a is positioned at directly over hydrothermal solution storehouse, cold liquid storehouse b is positioned under clean water sump, between cold liquid storehouse a and cold liquid storehouse b, by more than 15 groups condenser pipes, be connected together, and condenser pipe passes from hydrothermal solution storehouse and clean water sump; Inherent each group condenser pipe periphery, described hydrothermal solution storehouse is provided with one group of PTFE microporous tube membrane, and between PTFE microporous tube membrane and condenser pipe, has formed annular passage; Described clean water sump is connected with annular passage.
On the sidewall of described cold liquid storehouse a, be communicated with a cold liquid inlet tube, on the sidewall of cold liquid storehouse b, be communicated with a cold liquid outlet; On the lower sides in described hydrothermal solution storehouse, be communicated with a hydrothermal solution inlet tube, in the upper portion side wall in hydrothermal solution storehouse, be communicated with a hydrothermal solution outlet; On the sidewall of described clean water sump, be communicated with a pure water inlet pipe.
In described hydrothermal solution storehouse, be by pumping mode, to enter the processed steam-water mixing liquid of heating, and the steam-water mixing liquid of heat enters from hydrothermal solution inlet tube, from hydrothermal solution outlet, flow out and form closed cycle heating system, and the hydrothermal solution temperature in hydrothermal solution storehouse is not less than 70 ℃, the inside and outside temperature difference of condenser pipe is 25 ℃～35 ℃; In cold liquid storehouse a, logical supercooled liquid inlet tube enters normal temperature cooling fluid, cooling fluid enters in cold liquid storehouse b after by condenser pipe, and flow out from cold liquid outlet, under the mass transfer driving force that steam in hydrothermal solution storehouse forms in the temperature difference, through PTFE microporous tube membrane, contact with condenser pipe and be condensed into the liquid water purification that forms, then water purification flows freely into clean water sump from annular passage, finally from pure water inlet pipe, flows out and is collected.
As preferably, described condenser pipe is that thickness is the hollow corrosion resisting alloy plated film condenser pipe of 3～5mm.
As preferably, the diameter of described pure water inlet pipe is 3～5mm.
As preferably, described hydrothermal solution inlet tube and hydrothermal solution outlet opposing parallel are arranged on the lower wall in hydrothermal solution storehouse and the upper side wall in hydrothermal solution storehouse.
As preferably, described condenser pipe upper end is spirally connected or to be weldingly fixed on cold liquid storehouse a upper, and condenser pipe lower end is spirally connected or is weldingly fixed on cold liquid storehouse b.
Beneficial effect of the present invention is:
The present invention is sent by pumping to the processed steam-water mixing liquid after heating in hydrothermal solution storehouse, PTFE microporous tube membrane is immersed in hydrothermal solution storehouse, condenser pipe is enclosed in PTFE microporous tube membrane, and the cold liquid of normal temperature enters by flowing out formation closed cycle from cold liquid outlet condenser pipe from cold liquid inlet tube, under the mass transfer driving force that processed steam-water mixing liquid after heating forms in the temperature difference, through hydrophobic PTFE microporous tube membrane, contact with condenser pipe and be condensed into the liquid water purification that forms, condensation releasing heat is absorbed and the formation recuperation of heat that heats up by cold liquid, can be for removing the volatile solutes in the aqueous solution, the separation that the present invention is very suitable for VOC in the aqueous solution as a kind of novel membrane separation technique is concentrated, the temperature difference that is a kind of atmospheric low-temperature drives separation process, without under high pressure carrying out as pressure-driven membrane separation technique, therefore save the energy, and the cold liquid of normal temperature exchanges heat absorption by progressively intensification formation recuperation of heat is recycling by cycling hot in condenser pipe, its heat recovery rate is high.
PTFE microporous tube membrane of the present invention has very strong chemical stability, lightweight, and corrosion-resistant strong, resistance to environmental change is good, is applicable to sewage purification, and its filtering accuracy is high.Hydrothermal solution is that vapour mixing wastewater with air liquid forms wriggling in hydrothermal solution storehouse, PTFE microporous tube membrane is to be immersed in the hydrothermal solution of wriggling, dirt in hydrothermal solution is difficult for being attached on PTFE microporous pipe face like this, can not produce hydrophobic membrane hydrophiling seepage, solute substance fouling blockage problem, again because mechanism of mass transfer is the mass transfer driving force of utilizing the temperature difference to form, high without high drive so mass-transfer efficiency, energy consumption is low simultaneously, efficiency is high, reliability is strong, and the long service life of PTFE microporous tube membrane.Can utilize solar energy, underground heat, hot spring, waste heat of plant and the warm cheap energy such as industrial wastewater, realize the film distillation application of energy-conserving and environment-protective.
Multiple high concentration, high salinity, the toxicity organic wastewater degraded large, bio-refractory that the present invention is applicable to the industries such as organic chemical industry, fine chemistry industry, petrochemical industry, dyestuff, pharmacy, agricultural chemicals, printing and dyeing, papermaking is processed, it is can anti-soil stifled, low energy consumption, distiller life-span are long, can reduce and invest and operating cost.
Accompanying drawing explanation:
Below in conjunction with accompanying drawing, the present invention is described further:
Fig. 1 is structural representation of the present invention;
Fig. 2 is use state perspective view of the present invention.
The specific embodiment:
Embodiment, see attached Fig. 1 and 2, a kind of normal pressure anti-soil blocks up energy-saving film distiller, comprise cold liquid storehouse 1, hydrothermal solution storehouse 2 and clean water sump 3, described cold liquid storehouse, hydrothermal solution storehouse and clean water sump are respectively circular cylindrical shell body structure, and external diameter is 400mm, described clean water sump be positioned at hydrothermal solution storehouse under, described cold liquid storehouse has two, for cold liquid storehouse a101 and cold liquid storehouse b102, cold liquid storehouse a is positioned at directly over hydrothermal solution storehouse, cold liquid storehouse b is positioned under clean water sump, between cold liquid storehouse a and cold liquid storehouse b, by 16 groups of condenser pipes 4, be connected together, and condenser pipe passes from hydrothermal solution storehouse and clean water sump, condenser pipe is external diameter 15～25mm, thickness is the hollow corrosion resisting alloy plated film condenser pipe of 3～5mm, condenser pipe upper end is spirally connected or is weldingly fixed on cold liquid storehouse a, condenser pipe lower end is spirally connected or is weldingly fixed on cold liquid storehouse b.
Inherent each group condenser pipe periphery, described hydrothermal solution storehouse is provided with one group of PTFE microporous tube membrane 5, and between PTFE microporous tube membrane and condenser pipe, has formed annular passage 6; Described clean water sump is connected with annular passage.
On the sidewall of described cold liquid storehouse a, be communicated with a cold liquid inlet tube 7, on the sidewall of cold liquid storehouse b, be communicated with a cold liquid outlet 8, the cold liquid of normal temperature is flowed out and forms closed cycle from cold liquid outlet by condenser pipe from cold liquid inlet tube, and cold liquid exchanges heat absorption by the formation recuperation of heat that progressively heats up by cycling hot in condenser pipe, prevent thermal loss, reach energy-saving effect, on the lower sides in described hydrothermal solution storehouse, be communicated with a hydrothermal solution inlet tube 9, in the upper portion side wall in hydrothermal solution storehouse, be communicated with a hydrothermal solution outlet 10, hydrothermal solution inlet tube and hydrothermal solution outlet opposing parallel are arranged on the lower wall in hydrothermal solution storehouse and the upper side wall in hydrothermal solution storehouse, processed steam-water mixing liquid after heating is sent by pumping to hydrothermal solution storehouse, hydrothermal solution enters hydrothermal solution storehouse from hydrothermal solution inlet tube and flows out from hydrothermal solution outlet, in forming in hydrothermal solution storehouse, hydrothermal solution is wriggled, form like this closed cycle heating, guarantee that hot solution is not less than 70 ℃, PTFE microporous tube membrane is immersed in hydrothermal solution storehouse, condenser pipe is through in PTFE microporous tube membrane.
On the sidewall of described clean water sump, be communicated with a pure water inlet pipe 11, the diameter of pure water inlet pipe is 3～5mm.
The preparation technology of described PTFE microporous tube membrane is the tubular type hydrophobic membrane that adopts preparation method that the patent No. is 2013103991139 to prepare.
Operation principle of the present invention: the present invention can adopt in use three groups of film distillers are in series and carry out water purification extraction, as accompanying drawing 2, in its hydrothermal solution storehouse, be by pumping mode, to enter the processed steam-water mixing liquid of heating, and the steam-water mixing liquid of heat enters from hydrothermal solution inlet tube, from hydrothermal solution outlet, flow out and form closed cycle heating system, hydrothermal solution temperature in first hydrothermal solution storehouse is not less than 70 ℃, and guarantees that the inside and outside temperature difference of each group condenser pipe is 25 ℃～35 ℃; In cold liquid storehouse a, logical supercooled liquid inlet tube enters normal temperature cooling fluid, cooling fluid enters in cold liquid storehouse b after by condenser pipe, and flow out from cold liquid outlet, under the mass transfer driving force that steam in hydrothermal solution storehouse forms in the temperature difference, through PTFE microporous tube membrane, contact with condenser pipe and be condensed into the liquid water purification that forms, then water purification flows freely into clean water sump from annular passage, finally from pure water inlet pipe, flows out and is collected.
In above description, a lot of details have been set forth so that fully understand the present invention.But above description is only preferred embodiment of the present invention, the present invention can implement to be much different from alternate manner described here, so the present invention is not subject to the restriction of disclosed concrete enforcement above.Any skilled personnel are not departing from technical solution of the present invention scope situation simultaneously, all can utilize method and the technology contents of above-mentioned announcement to make many possible changes and modification to technical solution of the present invention, or be revised as the equivalent embodiment of equivalent variations.Every content that does not depart from technical solution of the present invention, to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs to the technology of the present invention according to technical spirit of the present invention.
Claims (5)
1. a normal pressure anti-soil blocks up energy-saving film distiller, it is characterized in that: comprise cold liquid storehouse, hydrothermal solution storehouse and clean water sump, described cold liquid storehouse, hydrothermal solution storehouse and clean water sump are respectively circular cylindrical shell body structure, described clean water sump be positioned at hydrothermal solution storehouse under, described cold liquid storehouse has two, for cold liquid storehouse a and cold liquid storehouse b, cold liquid storehouse a is positioned at directly over hydrothermal solution storehouse, cold liquid storehouse b is positioned under clean water sump, between cold liquid storehouse a and cold liquid storehouse b, by more than 15 groups condenser pipes, be connected together, and condenser pipe passes from hydrothermal solution storehouse and clean water sump; Inherent each group condenser pipe periphery, described hydrothermal solution storehouse is provided with one group of PTFE microporous tube membrane, and between PTFE microporous tube membrane and condenser pipe, forms annular passage; Described clean water sump is connected with annular passage;
On the sidewall of described cold liquid storehouse a, be communicated with a cold liquid inlet tube, on the sidewall of cold liquid storehouse b, be communicated with a cold liquid outlet; On the lower sides in described hydrothermal solution storehouse, be communicated with a hydrothermal solution inlet tube, in the upper portion side wall in hydrothermal solution storehouse, be communicated with a hydrothermal solution outlet; On the sidewall of described clean water sump, be communicated with a pure water inlet pipe;
In described hydrothermal solution storehouse, be by pumping mode, to enter the processed steam-water mixing liquid of heating, and the steam-water mixing liquid of heat enters from hydrothermal solution inlet tube, from hydrothermal solution outlet, flow out and form closed cycle heating system, and the hydrothermal solution temperature in hydrothermal solution storehouse is not less than 70 ℃, the inside and outside temperature difference of condenser pipe is 25 ℃～35 ℃; In cold liquid storehouse a, logical supercooled liquid inlet tube enters normal temperature cooling fluid, cooling fluid enters in cold liquid storehouse b after by condenser pipe, and flow out from cold liquid outlet, under the mass transfer driving force that steam in hydrothermal solution storehouse forms in the temperature difference, through PTFE microporous tube membrane, contact with condenser pipe and be condensed into the liquid water purification that forms, then water purification flows freely into clean water sump from annular passage, finally from pure water inlet pipe, flows out and is collected.
2. the stifled energy-saving film distiller of a kind of normal pressure anti-soil according to claim 1, is characterized in that: described condenser pipe is external diameter 15～25mm the hollow corrosion resisting alloy plated film condenser pipe that thickness is 3～5mm.
3. the stifled energy-saving film distiller of a kind of normal pressure anti-soil according to claim 1, is characterized in that: the diameter of described pure water inlet pipe is 3～5mm.
4. the stifled energy-saving film distiller of a kind of normal pressure anti-soil according to claim 1, is characterized in that: described hydrothermal solution inlet tube and hydrothermal solution outlet opposing parallel are arranged on the lower wall in hydrothermal solution storehouse and the upper side wall in hydrothermal solution storehouse.
5. the stifled energy-saving film distiller of a kind of normal pressure anti-soil according to claim 1, is characterized in that: described condenser pipe upper end is spirally connected or is weldingly fixed on cold liquid storehouse a above, and condenser pipe lower end is spirally connected or is weldingly fixed on cold liquid storehouse b.
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| CN201410405138.XA CN104147932A (en) | 2014-08-18 | 2014-08-18 | Normal-pressure pollution and plugging resistant energy-saving membrane distiller |
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| CN201410405138.XA CN104147932A (en) | 2014-08-18 | 2014-08-18 | Normal-pressure pollution and plugging resistant energy-saving membrane distiller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110713219A (en) * | 2019-10-12 | 2020-01-21 | 申杰涛 | Multistage flash evaporation technology and device for flash evaporation of flow flash evaporation surface |
| CN115259287A (en) * | 2022-09-03 | 2022-11-01 | 南华大学 | High-yield tubular membrane distillation membrane device and wastewater concentration method |
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