CN107628660A - A kind of high salinity waste water mechanical vapor recompresses MVR systems technologies - Google Patents
A kind of high salinity waste water mechanical vapor recompresses MVR systems technologies Download PDFInfo
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- CN107628660A CN107628660A CN201711070122.8A CN201711070122A CN107628660A CN 107628660 A CN107628660 A CN 107628660A CN 201711070122 A CN201711070122 A CN 201711070122A CN 107628660 A CN107628660 A CN 107628660A
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Abstract
A kind of high salinity waste water mechanical vapor recompression MVR systems technologies of the present invention, it is characterized in that waste water stoste enters evaporator evaporation after entering preheater preheating, indirect steam caused by evaporation and unevaporated stoste enter separator progress gas-liquid separation together in evaporator, indirect steam enters vapour compression machine compression temperature after further separating in the separator, stoste is heated into evaporator shell-side as thermal source after pressure rise, it is changed into condensed water after steam release latent heat and enters condensate water pot, the stoste isolated in separator continues to evaporate through circulating pump into evaporator, condensed water in condensate water pot, which enters after preheater preheats to stoste, discharges.The invention has the advantages that：Treated sewage reusing and waste residue utilization are taken into full account in system design, provides the energy-saving and waste and old total solution utilized for enterprise, efficient energy-saving, long period are target without maintenance operation, promote the real realization of wastewater zero discharge.
Description
Technical field
The present invention relates to water-treatment technology field, in particular to a kind of high salinity waste water mechanical vapor recompression MVR systems
Technology.
Background technology
Mechanical vapor recompression technology (Mechanical Vapour Recompressor, MVR) is a kind of energy-efficient
New evaporation technique, be widely used in the every profession and trade using wastewater zero discharge solution, including thermal power generation, coal work
The industries such as industry, coal chemical industry, petrochemical industry, papermaking, metallurgy, percolated liquid in city refuse landfill processing, oil-sand exploitation.Mechanical vapour
During recompression, the steam (indirect steam) for being steamed evaporator by the compressor of Mechanical Driven is compressed to elevated pressures, circulation
Reuse is heating steam, can lack with or without raw steam (primary steam), without the loss of latent heat, only consume a small amount of electricity
Can, so as to reach energy-conservation purpose.MVR evaporators no longer need steam in evaporation process, it is only necessary to consume a small amount of electric energy, often evaporate
1000kg water, it is only necessary to consume 20~30 degree of electricity, and be not required to cooling water and vavuum pump.Research shows, the effect of single MVR evaporators
Rate, in theory equivalent to the multi-effect evaporation system of 20 effects.MVR technologies technology relative maturity abroad, also there is success at home
Using.There are a small number of manufacturers, but a mainly technology-imitation in the country at present, lacks system further investigation, product market at home
There are a small amount of application, but energy saving of system DeGrain, and easily occur the problems such as fouling, corrosion in use, it is operational and reliable
Property is poor, constrains the popularization of MVR technologies and the realization of wastewater zero discharge.The problem of existing for current MVR technologies application, this item
Mesh integrates school-run enterprise both sides' resource, integrally starts with from MVR systems, the viewpoint coupled using system, by theory analysis, numerical simulation and
Experimental study is combined, and system research is carried out in terms of technique, equipment, control three, with efficient energy-saving, long period without maintenance operation
For target, technique, equipment coupling optimization are carried out to system, to break external monopolization, produces the MVR core skills of independent intellectual property right
Art, promote the extensive use of MVR technologies.
The content of the invention
The technical problem to be solved in the present invention is to overcome above technological deficiency, there is provided a kind of high salinity waste water mechanical vapor is again
Compress MVR systems technologies.
In order to solve the above technical problems, technical scheme provided by the invention is：A kind of high salinity waste water mechanical vapor is pressed again
Contracting MVR systems technologies, including：Vapour compression machine, evaporator, preheater, chilled water tank, vacuum system, purging system and control
System, the evaporator include heater, separator and circulating pump, it is characterised in that it is laggard that waste water stoste enters preheater preheating
Enter evaporator evaporation, indirect steam caused by evaporation and unevaporated stoste enter separator and carries out gas-liquid point together in evaporator
From indirect steam enters after entering vapour compression machine compression temperature, pressure rise after further separating in the separator as thermal source
Enter evaporator shell-side to heat stoste, being changed into condensed water after steam release latent heat enters condensate water pot, separates in separator
The stoste gone out continues to evaporate through circulating pump into evaporator, and the condensed water in condensate water pot enters preheater and preheats heel row to stoste
Go out.
Preferably, the heater includes 1st effective evaporator, 2nd effect evaporator and triple effect evaporator.
Preferably, the separator includes an effect separator, two effect separators and triple effect separator.
Preferably, the circulating pump includes an effect circulating pump, two effect circulating pumps and triple effect cycle pump.
The invention has the advantages that：Treated sewage reusing and waste residue utilization are taken into full account in system design, section is provided for enterprise
It can lower consumption and the waste and old total solution utilized, efficient energy-saving, long period are target without maintenance operation, promote wastewater zero discharge
Real realization.Using the MVR core technologies of independent intellectual property right as target, to promote the extensive use of MVR technologies at home.
Based on the viewpoint of system coupling, project carries out system research from technique, equipment, control tripartite in face of MVR technologies, whole beneficial to system
The optimization of body；MVR techniques are placed under the big process environments of wastewater zero discharge or even whole enterprise water use, beneficial to enterprise Shui Chu
The optimization of reason field total solution；Using efficient energy-saving, long period without maintenance operation as target, taken into account the elder generation of project research
The property entered and practicality.Theory analysis, numerical simulation and experimental study are combined by project research, both improve Efficiency, again
Ensure the reliability of conclusion.
Brief description of the drawings
Fig. 1 is the MVR system schematics of the present invention.
Embodiment
As illustrated, a kind of high salinity waste water mechanical vapor recompression MVR systems technologies, including：Vapour compression machine, evaporation
Device, preheater, chilled water tank, vacuum system, purging system and control system, the evaporator include heater, separator with
Circulating pump, it is characterised in that waste water stoste, which enters after preheater preheats, enters evaporator evaporation, in evaporator two caused by evaporation
Secondary steam and unevaporated stoste enter separator and carry out gas-liquid separation together, after indirect steam further separates in the separator
Stoste is heated into evaporator shell-side as thermal source after into vapour compression machine compression temperature, pressure rise, steam is released
Put and be changed into condensed water after latent heat and enter condensate water pot, the stoste isolated in separator continues to steam through circulating pump into evaporator
Send out, the condensed water in condensate water pot, which enters after preheater preheats to stoste, discharges.
The heater includes 1st effective evaporator, 2nd effect evaporator and triple effect evaporator.
The separator includes an effect separator, two effect separators and triple effect separator.
The circulating pump includes an effect circulating pump, two effect circulating pumps and triple effect cycle pump.
MVR system principles：The vapour pressure of water and the vapour pressure variation with temperature of solution and change, at the same pressure,
The boiling point of solution is higher than the boiling point of pure water, and the difference of two kinds of boiling points is called the elevation of boiling point of solution.The concentration of solution is bigger, molten
The elevation of boiling point of liquid is bigger.In general, the elevation of boiling point numerical value of weak solution or organic colloid solution is smaller；And inorganic salt solution
Elevation of boiling point number it is larger.For same solution, ebullioscopic numerical value with the suffered pressure of the concentration of solution and boiling and
Become.Concentration is higher, and suffered pressure is lower, and elevation of boiling point numerical value is bigger.
It follows that when handling the elevated waste water of higher boiling using MVR systems, due to the elevation of boiling point of waste water it is larger thus
The temperature difference that compressor is lifted has major part to be used to the influence for overcoming boiling point to rise, and only small part is used to waste water heating,
So need to provide more power to improve compression temperature rise to reach actual requirement.
MVR systems form：
Compressor：Nucleus equipment, compress indirect steam, there is provided evaporation thermal source, improve the heat content of indirect steam；
Evaporator：Main equipment, include heater, separator, circulating pump；
Preheater：UTILIZATION OF VESIDUAL HEAT IN and raising feeding temperature；
Vacuum system：The vacuum of whole system is maintained, extraction section on-condensible gas and solution are brought into from device
Gas, to reach the stable evaporating state of system；
Purging system：Using CIP situ cleanings or remove cleaning；
Control system：The control and regulation of compressor rotary speed, valve, flowmeter, temperature, pressure, evaporated, clearly with reaching automatic
The operation such as wash, shut down；Automatic alarm, automatic protective system is injury-free, keeps system dynamic equilibrium.
MVR system process combines and parameter optimization：Required for different feed liquid characteristics and evaporation, pass through different technique
Combination and parameter optimization, classification establish finer personalized PROCESS FOR TREATMENT scheme, establish energy saving of system model.Consider enterprise
Industry energy resource structure, waste water quality characteristic and other evaporation conditionses, Proper Match evaporation capacity, saltwater brine magnitude of recruitment, concentrate discharge rate,
The when technological parameter such as heat exchange area, heat transfer temperature difference is compressed, further to improve evaporation efficiency, unit energy consumption is reduced, develops
Energy-efficient MVR techniques.
Evaporator rises to have and weighed very much as the key equipment in MVR systems, its heat transfer property to the energy-conservation of whole system
The effect wanted, the technological process of MVR systems, it is necessary to according to the difference of medium, load and concentration, select different evaporator classes
Type, as single-action falling film evaporation, single-action climbing-film evaporation, single-action falling liquid film circulating and evaporating, single-action rise film circulating and evaporating, multiple-effect falling film and liter
Film circulating and evaporating is combined mode, and endless form can select Natural Circulation and forced circulation.Energy consumption of the elevation of boiling point to evaporation
Influence greatly, by determining and simulating the actual boiling point of different feed liquid concentration, it is determined that because the elevation of boiling point causes heat transfer temperature difference
Change, it is determined that optimal compressor horsepower, to reduce energy consumption, realizes system process efficiency optimization and stable operation.
Pipe wall of heat exchange pipe fouling suppression and Protective Research：The fouling of evaporation process pipe wall of heat exchange pipe can cause heat transfer deterioration, make
System vacuum reduces, circulating pressure rises, and influences the operational efficiency of unit, reduces the reliability of heat transmission equipment, and may make
Into larger economic loss.For different feed liquid characteristics and evaporation conditionses, more means fusions are comprehensive to solve evaporation process heat exchange
Tube wall scale problems.First, different types of heat exchanger and different materials are selected from structure, effectively to prevent dirty body
Generate and adhere in heat-transfer surface.Second, by studying the variables such as feed velocity, liquid viscosity, content of organics, salt ionic concentration
Influence to film forming thickness, scaling type is determined, in this way calcium sulfate type or Calcium carbonate etc., establish system heat exchange surface fouling
Model, by process optimization, suppress or delay the fouling of exchanger tube wall, and establish the normal on-line cleaning cycle, to safeguard
The long period normal operation of MVR vapo(u)rization systems；Third, for the feed liquid easily crystallized, cycles of concentration is controlled from technique, is used for reference " brilliant
Kind method " kind salt technology, adds " seeds " such as calcium sulfate in waste liquid, realizes " selective crystallization "；One is set up after gas-liquid separator
Special crystal separator, to remove crystallographic in time, crystal is not entered circulation concentrate, avoid crystal from being enriched with, press down
Fouling processed.
Device structure optimizes, the coupling optimization of evaporation structure parameter and technological parameter：It is conceived to device structure to technique
The influence of process, emphasis optimize to evaporator internals, including the structure of heat-exchanging tube bundle, bittern distributor, demister etc., by force
Change heat transfer and defogging effect, and the coupling for focusing on evaporation structure parameter and technological parameter optimizes.
The system integration optimizes with control：Reasonable selection is carried out to vapour compression machine according to technological requirement, and according to determination
Several big numerical simulation modules, exploitation computer control system carry out intelligent control, carry out the Optimized Matching of machine system.
It is described above, only it is preferred embodiments of the present invention, not limits the present invention, it is any to be familiar with
Professional and technical personnel is changed or is modified as equivalent variations equivalent embodiment possibly also with the technology contents of the disclosure above.
But it is every without departing from technical solution of the present invention content, the technical spirit according to the present invention is to any letter made for any of the above embodiments
Single modification, equivalent variations and remodeling, still fall within technical solution of the present invention protection domain.
Claims (4)
1. a kind of high salinity waste water mechanical vapor recompresses MVR systems technologies, including：Vapour compression machine, evaporator, preheater,
Chilled water tank, vacuum system, purging system and control system, the evaporator include heater, separator and circulating pump, and it is special
Sign is that waste water stoste enters evaporator evaporation after entering preheater preheating, evaporated in evaporator caused by indirect steam and do not steam
The stoste of hair enters separator and carries out gas-liquid separation together, and indirect steam enters both vapor compression after further separating in the separator
Stoste is heated into evaporator shell-side as thermal source after machine compression temperature, pressure rise, is changed into after steam release latent heat
Condensed water enters condensate water pot, and the stoste isolated in separator continues to evaporate through circulating pump into evaporator, in condensate water pot
Condensed water enter preheater to stoste preheat after discharge.
A kind of 2. high salinity waste water mechanical vapor recompression MVR systems technologies according to claim 1, it is characterised in that：
The heater includes 1st effective evaporator, 2nd effect evaporator and triple effect evaporator.
A kind of 3. high salinity waste water mechanical vapor recompression MVR systems technologies according to claim 1, it is characterised in that：
The separator includes an effect separator, two effect separators and triple effect separator.
A kind of 4. high salinity waste water mechanical vapor recompression MVR systems technologies according to claim 1, it is characterised in that：
The circulating pump includes an effect circulating pump, two effect circulating pumps and triple effect cycle pump.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108569739A (en) * | 2018-03-22 | 2018-09-25 | 福建三农新材料有限责任公司 | System and method for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid |
| CN109251128A (en) * | 2018-08-31 | 2019-01-22 | 华东理工大学 | A kind of method of high efficiency, low cost concentration 1,3- propanediol fermentation liquor |
| CN110436548A (en) * | 2019-09-05 | 2019-11-12 | 广州市心德实业有限公司 | A kind of complete processing equipment of high-salt wastewater vaporation-type zero-emission |
| CN114832410A (en) * | 2022-05-31 | 2022-08-02 | 广州市心德实业有限公司 | MVR series partial pressure evaporation method |
| CN114870413A (en) * | 2022-04-14 | 2022-08-09 | 杭州特种纸业有限公司 | Recycling method of zinc chloride solution for vulcanized fiber paper |
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| CN101497466A (en) * | 2008-02-02 | 2009-08-05 | 上海达源环境科技工程有限公司 | Vapor compression sewage treatment system |
| US20120279847A1 (en) * | 2007-07-24 | 2012-11-08 | Brad Michael Malatesta | Method of cleaning and recycling glycol-tainted water from de-icing operations at airports |
| CN104986910A (en) * | 2015-07-23 | 2015-10-21 | 江苏德邦工程有限公司 | Mechanical steam recompression falling film evaporation process method and system |
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2017
- 2017-11-03 CN CN201711070122.8A patent/CN107628660A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120279847A1 (en) * | 2007-07-24 | 2012-11-08 | Brad Michael Malatesta | Method of cleaning and recycling glycol-tainted water from de-icing operations at airports |
| CN101497466A (en) * | 2008-02-02 | 2009-08-05 | 上海达源环境科技工程有限公司 | Vapor compression sewage treatment system |
| CN104986910A (en) * | 2015-07-23 | 2015-10-21 | 江苏德邦工程有限公司 | Mechanical steam recompression falling film evaporation process method and system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108569739A (en) * | 2018-03-22 | 2018-09-25 | 福建三农新材料有限责任公司 | System and method for recycling OP-10 in polytetrafluoroethylene (PTFE) concentration dispersion liquid waste liquid |
| CN109251128A (en) * | 2018-08-31 | 2019-01-22 | 华东理工大学 | A kind of method of high efficiency, low cost concentration 1,3- propanediol fermentation liquor |
| CN110436548A (en) * | 2019-09-05 | 2019-11-12 | 广州市心德实业有限公司 | A kind of complete processing equipment of high-salt wastewater vaporation-type zero-emission |
| CN114870413A (en) * | 2022-04-14 | 2022-08-09 | 杭州特种纸业有限公司 | Recycling method of zinc chloride solution for vulcanized fiber paper |
| CN114832410A (en) * | 2022-05-31 | 2022-08-02 | 广州市心德实业有限公司 | MVR series partial pressure evaporation method |
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Application publication date: 20180126 |