CN110420471A - A kind of energy saving vapo(u)rization system for liquid evaporation - Google Patents
A kind of energy saving vapo(u)rization system for liquid evaporation Download PDFInfo
- Publication number
- CN110420471A CN110420471A CN201910761366.3A CN201910761366A CN110420471A CN 110420471 A CN110420471 A CN 110420471A CN 201910761366 A CN201910761366 A CN 201910761366A CN 110420471 A CN110420471 A CN 110420471A
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- Prior art keywords
- liquid
- gas
- evaporated
- absorbent
- compressed air
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
- B01D1/0041—Use of fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The present invention provides a kind of novel energy saving vapo(u)rization system, it is used as using compressed air and venturi mixer is evaporated as evaporation equipment, venturi mixer nozzle is connected with compressed air, compressed air (passes through at a high speed injection stream, liquid in evaporated liquid storage tank is brought into the mixing chamber of venturi mixer, realize gas liquid mixing, gas liquid mixture enters gas-liquid separator and carries out two-phase laminated flow；Gas-liquid separator (10) top is connected with absorption tower air inlet, and lower part is connected with wet tank；The mixture of the air and liquid vapour that are evaporated enters the absorption tower, is absorbed using absorbent.
Description
Technical field
The present invention relates to a kind of novel vapo(u)rization systems for substituting MVR vapo(u)rization system.
Background technique
There is a large amount of evaporation operation in the industrial production, industrial evaporation is the rich and influential family of energy consumption, especially in chemical industry
Pharmacy, sea water desalination, sewage treatment, papermaking etc..In current large-scale industrial production, most basic vapo(u)rization system includes to pass
Thermal, gas-liquid separation device, connecting line.Energy saving evaporation technology is usually using MVR vapo(u)rization system and multiple-effect evaporation.
Multiple-effect evaporation is to use multiple evaporator series, and each evaporator is known as an effect, and exogenous steam is passed through first
Evaporator is imitated, so that solution boiling is generated secondary steam, this secondary steam is passed through second evaporator, similarly the second effect generates
Steam can be passed through third effect evaporator, and so on.Multi-effect evaporator has reused thermal energy, can significantly reduce external source
Steam consumption greatly reduces cost.Based on experience value, one ton of level of four-effect evaporator system evaporation takes around 300 kilograms of steamings
Vapour, according to the evaporation capacity of 1 ton of water per hour, it is assumed that annual evaporation time is 7200 hours, and steam cost is 200 yuan/ton, then
1 year evaporation cost is 430,000 yuan or so.But multi-effect evaporation system is with the increase of effect number, the investment and complexity of equipment
Degree increases, and the heat transfer temperature loss of each effect becomes larger, number of transfer units decline, generallys use triple effect in industry or quadruple effect steams
Hair system, more than the vapo(u)rization system of quadruple effect and uneconomical.
In order to further reduce the cost, and MVR vapo(u)rization system is had developed, MVR is exactly mechanical steam recompression technology
English abbreviation.MVR system compresses secondary steam using vapour compression machine compared with traditional vapo(u)rization system, makes low temperature
Steam temperature improve, pressure improve, heat content increase, then as heating steam be sent into evaporator in replace external heat
Recycling for steam is realized in source.Therefore, MVR vapo(u)rization system is not necessarily to exogenous steam other than starting, the requirement supplied water to gas supply
Low, public work is mating few, and corresponding occupied area is small, and total investment of engineering is few, low energy consumption, operating cost is low, and evaporation efficiency is high.
The process form of MVR system is varied, there is the MVR system of single effect evaporation, there is the MVR system of multiple-effect evaporation, there is rectifying MVR system
System.
The energy-efficient core of MVR vapo(u)rization system is to be done work by mechanical compression to secondary steam, and steam is heated up, thermal energy is reached
The purpose made full use of.When liquid is heated by external heat source, it is warming up to boiling and generates secondary steam, the temperature of secondary steam
It is consistent with the fluid temperature of boiling, it is even lower.Between the two without the temperature difference, without driving force of heat transfer, it can not exchange heat and utilize heat
Energy.The compressor of MVR system sucks secondary steam, and impeller high speed rotation, secondary steam pressure increases discharge, and vapor (steam) temperature obtains
To promotion, steam enters heat exchanger, exchanges heat with the liquid for the heat for reaching boiling point, liquid boiling simultaneously generates steam, heat outputting
Amount with quantity of heat given up reach balance, hardly need external source, using vapour compression machine can continuous evaporation, reached section
The purpose of energy.According to industry experience value, one ton of water is evaporated, the compressor of MVR system averagely needs 50KW-70KW power, with electricity
Take the estimation of 0.65 yuan/degree, Nian Yunhang 7200 hours, consumption 1 year for evaporating aspect was about 280,000 yuan or so.Compared to multiple-effect evaporation
System more saves money, and is current energy-saving effect vapo(u)rization system most outstanding.
But MVR vapo(u)rization system influences " surge " phenomenon often occur in its use, such as compressor operation there are disadvantage, when
When vapour compression machine does work, if the amount that secondary steam evaporation generates is insufficient, under compressor work, suction port of compressor pipeline it
Preceding system forms negative pressure state, and compressor pressure entrance is lower than outlet pressure, and the steam of outlet is by suck-back inlet port, compressor
Impeller and the gas that backflows impact mutually and generate abnormal sound.Surge influences impeller service life.Therefore MVR system requirements evaporates
The generation of steam has to last for and stablizes in the process.But many factors will affect the stability of secondary steam generation, such as water
The accumulation of middle organic matter, organic matter are covered on water phase surface, quantity of steam are caused to decline.And compressor involves great expense, and maintenance is protected
It supports costly.Compressor impeller high speed rotation, locating operating condition have high requirements to the material and machining accuracy of impeller, industrially
Titanium alloy material is generallyd use, duration of service is also shorter.
Vapour compression machine can only be limited raising steam temperature, usually 20 DEG C -25 DEG C or so.The limitation of this characteristic
MVR vapo(u)rization system application field.In many liquor evaporation processes, the liquidus temperature of the boiling of liquid is greater than the temperature for generating steam
Degree will lead to the decline of MVR evaporation efficiency in this way.Such as under the operating condition having, temperature is 120 DEG C when being evaporated waste water boiling, and
The temperature for generating water vapour is 100 DEG C, and secondary steam is also 120 DEG C of left sides by the vapor (steam) temperature after compressor workmanship promotion temperature
The right side, steam and salt water number of transfer units are very low, and under such operating condition, common steam compressor cannot be used, and need using more smart
Close and expensive compressor, overall cost are very high.The boiling temperature of some salt water has been more than 20 DEG C relative to the temperature of vapor
Even higher, MVR system is completely not applicable.In short, the temperature rise that compressor provides is limited.And MVR is generally not used to steam
The low organic matter of flash-point is sent out, the low organic steam of flash-point risk when heating up by compressor pressurization is higher.
No matter all there are shortcomings and limitations in multiple-effect evaporation and MVR system.
Summary of the invention
Technical solution
The problem to be solved by the invention is to provide a kind of novel energy saving vapo(u)rization systems.
The technical solution provided by the present invention is: evaporating liquid using venturi mixer and compressed air, evaporation is generated
Air and the gaseous mixture of steam liquid and heat are absorbed by absorption tower, the raised liquid of temperature and liquid to be evaporated after absorption
Body allows thermal energy to be utilized by wall-type heat exchange.
Vapo(u)rization system of the invention can be dropped by using venturi mixing evaporated liquid and compressed air mixing jetting
The energy consumption of low evaporation.
Scheme parsing
Vapo(u)rization system component part of the invention including but not limited to: venturi mixer, compressed air, changes wet tank
Hot device, gas-liquid separator, absorption tower, condensed fluid storage tank.Liquid to be evaporated is risen into certain temperature using heater, is compressed
Air enters venturi mixer by injection stream, and liquid to be evaporated is drawn into mixer by compressed air, high-speed jet
Air and liquid to be evaporated be sufficiently mixed in venturi mixer, under the action of mixing air, the saturated vapor of liquid point
Press subatmospheric, and liquid is carried secretly by aerodynamic energy, realizes evaporation.Jet stream and go out gas-liquid mixture enter a constant volume
In long-pending gas-liquid separator, gas and drop are separated, and the admixture of gas containing air and supersaturated vapor leaves gas-liquid
Separator, liquid after evaporative condenser is used into the tower bottom on absorption tower, at the top of absorbing tower is as absorbent.Absorbent absorbs empty
Vapor portion in gas absorbs heat simultaneously, itself obtains temperature rise.
The wet tank is provided with certain liquid to be evaporated, and wet tank is connected with heat exchanger, and described changes
Hot device is connected with venturi mixer, the venturi mixer respectively at the compressed gas gas supply, gas-liquid separator,
Heat exchanger is connected.The gas-liquid separator lower part is connected with the wet tank, the gas-liquid separator top obtained and institute
The absorption tower stated is connected, and the absorbing tower bottom is connected with the heat exchanger.
The compressed air is the air with certain pressure, and the pressure can come from compressor or blower.Institute
The compressed air stated, it is not limited to which air refers to the on-condensible gas with certain pressure, such as air, nitrogen, oxygen, described
Pressure refer to the supply gas pressure of compressed gas not less than 1.1Bar.
The venturi mixer is industrial general equipment, its working principle is that utilizing a kind of high rapid fire of medium
It flows other medium and is pumped into simultaneously fierce collisional mixing.
The absorption tower refers to the tray absorption columns or packed absorber industrially used, it is characterized in that gas is the bottom of from
Portion enters, and absorbent is flowed into from top, the two counter current contacting.The technical characteristic on the absorption tower is that the temperature of absorbent is lower than
Absorbed gas, using temperature difference, the saturated gas of evaporated liquid divides difference, absorbs the liquid being evaporated.
The heat exchanger is characterized in that transmitting heat by the way of septate heat transfer.The wall-type heat exchange refers to
Cold fluid is not in contact with each other with hot fluid, in such a way that heat-conducting medium carries out heat transfer.The heat exchanger is using related
Plate heat exchanger known to the technical staff of field, tubular heat exchanger.Its technical characteristic of the heat exchanger is, after absorption
Absorbent as heat source and liquid heat exchange to be evaporated.
Gas liquid mixture in venturi apparatus after mixing, into the gas-liquid separator, gas-liquid mixture
In this flash separation, the oversaturated steam of air entrainment is upward, and liquid flows away return to wet tank downwards.
The gas-liquid separator uses the separation of container realization secondary steam and liquid with a constant volume, built-in silk
Net filler or corrugated plate packing are gas-liquid separator general in chemical industry.
The steam refers to the steam that evaporated liquid generates.
Beneficial effect
According to the present invention, evaporated liquid does not need to be heated to boiling point can to evaporate, due to air or nitrogen with by wait steam
The mixing of lotion body, reduces the partial pressure of evaporated liquid, reduces evaporating temperature, can have by the heat-exchanger rig of dividing wall type
Effect utilizes heat source, and the kinetic energy that compressed air provides is efficiently converted into the energy of flashed liquid.Mechanical steam pressure is avoided simultaneously
The shortcomings that contracting machine, overall cost is very low.Whole equipment is easy miniaturization.
Detailed description of the invention Fig. 1 is the schematic diagram of an one of exemplary embodiments of the invention sewage evaporation system.
In figure, (10): gas-liquid separator；(20): tubular heat exchanger；(40): sewage storage tank；(60): compressed air；(30):
Tubular heat exchanger；(30): commercial vapor and tubular heat exchanger are as heat source；(80): absorption tower；(90): condensed water storage
Tank；(100): venturi mixer.
Specific embodiment
Embodiment
Attached drawing 1 is the schematic diagram of the single-effect evaporation system of the sewage designed according to the present invention, and main equipment includes gas-liquid separator
(10), tubular heat exchanger (20), sewage storage tank (40), compressed air (60), tubular heat exchanger (30), commercial vapor with
And tubular heat exchanger (30) is used as heat source, circulating pump, absorption tower (80) condense water storage tank (90), venturi mixer
(100).
Sewage storage tank (40) stores a certain amount of sewage to be evaporated, and there are three interfaces for storage tank, is separately connected plate heat exchanger
(20), gas-liquid separator water return outlet, sewage water supply pipe.Sewage storage tank (40) keeps certain liquid level, and liquid level passes through dirt when reducing
Water water supply pipe is automatically replenished.Plate heat exchanger (20) and sewage storage tank (40) outlet are connected, the other end and venturi mixing gas side
Face entrance is connected, and pneumatic plant provides the compressed air of certain pressure, is connected with the jet port of venturi gaseous mixture.Literary mound
In mixer (100) outlet be connected with gas-liquid separator import, gas vent and the absorption tower lower gas of gas-liquid separator enter
Mouth is connected, and liquid outlet is connected with circulating pump.The continual liquid circulation by after flash distillation of circulating pump goes back to storage tank (40).Heat exchange
Device (30) is connected with sewage storage tank (40), and absorbing tower bottom outlet is connected with heat exchanger (30), and this design plays import sewage
To pre- heat effect.
System start-up phase, high-temperature vapor are passed through heat exchanger (30) and preheat to sewage, until sewage temperature reaches
70 DEG C -99 DEG C, start pneumatic plant, nozzle sprays compressed air and brings hot water into gas-liquid separator, flashed, air
Absorption tower (80) are entered by the steam pipework of gas-liquid separator (10) with mixture of steam, isolated liquid portion flows back into dirt
Water storage tank.
The gaseous mixture enters from the lower part of the tower (80), flows up, and tower top uses absorbent and gaseous mixture
Counter current contacting, absorbent use industry water.Most saturated vapor is only absorbed by the water in air, while heat is also absorbed.It inhales
Absorbent after receipts enters heat exchanger (20) from tower bottom outflow, carries out pre-heating heat-exchanging with external sewage.
The design can allow sewage to realize evaporation when less than 100 degree of boiling points, and energy-saving effect is excellent.
Claims (3)
1. a kind of energy saving vapo(u)rization system for liquid evaporation；
Including venturi mixer (100), compressed air (60), wet tank (40), absorption tower needed for secondary steam heating
(80), heat exchanger (20), gas-liquid separator (10)；
The wet tank is connected with venturi mixer inlet；
The venturi mixer (100), it is characterised in that nozzle is connected with compressed air；The compressed air (60) its
It is characterized in that the liquid in evaporated liquid storage tank by injection stream, is brought into the mixing of venturi mixer (100) by high speed
It is intracavitary, realize gas liquid mixing；The mixing chamber is connected with gas-liquid separator (10)；The gas liquid mixture into
Enter gas-liquid separator (10) and carries out two-phase laminated flow；Gas-liquid separator (10) top is connected with absorption tower (80) air inlet,
Lower part is connected with wet tank (40)；
Gas liquid mixture separation in the gas-liquid separator (10), liquid are formed by evaporation to air and liquid vapour
Mixture；The mixture of the air and liquid vapour enters the absorption tower (80), is absorbed using absorbent；Institute
The absorbent stated absorbs liquid vapour；Absorbent after absorption enters heat exchanger (20), in wet tank (40) wait steam
Send out liquid heat exchange.
2. absorption tower (80) according to claim 1, it is characterised in that the absorbent and the liquid to be evaporated
For same substance.
3. heat exchanger (20) according to claim 1, it is characterised in that absorbent after the absorption as heat source, with
The liquid heat exchange to be evaporated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910761366.3A CN110420471A (en) | 2019-08-18 | 2019-08-18 | A kind of energy saving vapo(u)rization system for liquid evaporation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910761366.3A CN110420471A (en) | 2019-08-18 | 2019-08-18 | A kind of energy saving vapo(u)rization system for liquid evaporation |
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| CN110420471A true CN110420471A (en) | 2019-11-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109336203A (en) * | 2018-11-26 | 2019-02-15 | 广东威特宝土壤修复科研中心有限公司 | Waste water evaporation process system and the processing system that water is evaporated by change water quality |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101491738A (en) * | 2008-01-22 | 2009-07-29 | 苏庆泉 | Vaporization system and vaporization concentration method |
| CN201880163U (en) * | 2010-11-15 | 2011-06-29 | 中国人民解放军第三医院 | Spray anesthetic evaporator |
| CN105668832A (en) * | 2016-01-29 | 2016-06-15 | 湖南九沣电力科技有限公司 | Desulfurization wastewater treatment system and method |
| CN106673101A (en) * | 2016-12-28 | 2017-05-17 | 常州大学 | Deep treatment method and system for high-salinity desulfurization wastewater |
-
2019
- 2019-08-18 CN CN201910761366.3A patent/CN110420471A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101491738A (en) * | 2008-01-22 | 2009-07-29 | 苏庆泉 | Vaporization system and vaporization concentration method |
| CN201880163U (en) * | 2010-11-15 | 2011-06-29 | 中国人民解放军第三医院 | Spray anesthetic evaporator |
| CN105668832A (en) * | 2016-01-29 | 2016-06-15 | 湖南九沣电力科技有限公司 | Desulfurization wastewater treatment system and method |
| CN106673101A (en) * | 2016-12-28 | 2017-05-17 | 常州大学 | Deep treatment method and system for high-salinity desulfurization wastewater |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109336203A (en) * | 2018-11-26 | 2019-02-15 | 广东威特宝土壤修复科研中心有限公司 | Waste water evaporation process system and the processing system that water is evaporated by change water quality |
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Application publication date: 20191108 |
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