CN205953579U - Technology simulation experiment device based on LNG cold energy seawater desalination - Google Patents
Technology simulation experiment device based on LNG cold energy seawater desalination Download PDFInfo
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- CN205953579U CN205953579U CN201620833032.4U CN201620833032U CN205953579U CN 205953579 U CN205953579 U CN 205953579U CN 201620833032 U CN201620833032 U CN 201620833032U CN 205953579 U CN205953579 U CN 205953579U
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
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Abstract
The utility model discloses a technology simulation experiment device based on LNG cold energy seawater desalination, its freezing system ice unit, constant temperature gravity desalination unit and centrifugal desalination unit of connecting including the order, freezing system ice unit is equipped with automatic control system. The utility model provides a desalination unit energy saving and emission reduction, easy operation is convenient for implement, and control system is nimble effective, controls the desalination process through multivariable, multi -stage, multiple technologies means to parameter to desalinations at different levels are operated is optimized, and technology is novel, helps realizing high salt rejection and the balance that reduces factors such as engineering cost, festival energy saving bad news, to cold method seawater desalination's research and large -scale industry metaplasia product have higher directive significance from now on.
Description
Technical field
The present invention relates to the crossing domain of Engineering Thermophysics and water technology is and in particular to a kind of be based on LNG cold energy
The processing simulation experimental provision of desalinization.
Background technology
As one of the method for desalinization, low-temperature receiver can adopt natural cold source and artificial cold source for freezing desalination, the former
Limited by geographic climate it is difficult to heavy industrialization adopts, the latter needs to consume the substantial amounts of energy that (process of refrigerastion often needs
Consume high-grade electric energy).In addition, more crucially simple freezing and embrane method (as reverse osmosis membrane) and hot method
(as low-temperature multiple-effect distillation etc.) is compared, and its salt rejection rate is relatively low, thus fails to become the method for desalting seawater of main flow.
The increasing substantially of proportion, the coastal area import in China's primary energy consumption structure with natural gas
LNG harbour quickly grows, and the huge cold energy that LNG gasification is discharged can provide not climate condition to limit for freeze desalting process
Inexpensive low-temperature receiver, this is to carry out, using freezing, the opportunity that industrialized desalinization provides development.
Patent document CN104891593A discloses a kind of dress of the equipment with high desalinization desalinization based on cold energy of liquefied natural gas
Put, described device includes seawater supply system, seawater freezing and gravity centrifugation desalination system and the fresh water system being linked in sequence
System；Also include the liquefied natural gas gasifying system for seawater freezing energy supply and the secondary refrigerant phase transformation circulatory system.This device is main
It is applied near the large-scale harbour of setting LNG receiving station；However, having inflammable, explosive after being mixed with air due to methane gas
Danger, and this device nor the simulation impact to gravity desalting effect for the varying environment temperature, for security and acquisition system
The consideration of system running optimizatin parameter, needs invention to be applied under lab scale or laboratory environment and studies de-salting operation parameters at different levels are entered
Row optimizes and the overall device controlling.
Utility model content
(1) technical problem solving
The utility model overcomes the security flaw that prior art exists, and provides a kind of safe and simple, easily operated sea
Water desalination experimental provision, has stronger practicality, and can pointedly simulate under large-scale production state be based on freezed
The desalinization of journey, and the regulation and control for relevant parameter and research.
(2) technical scheme
The utility model provides a kind of processing simulation experimental provision based on LNG cold energy desalinization, described device bag
Include the freezing ice making unit being linked in sequence, constant temperature gravity desalinization unit and centrifugation desalination unit；Described freezing ice making unit is joined
Standby automatic control system.
Wherein, described freezing ice making unit specifically includes：Liquid nitrogen Phase Transition Systems, middle refrigerant circulation and sea water service system.This
In the analogue experiment installation that utility model provides, LNG is simulated using liquid nitrogen, be because that the transition temperature range of liquid nitrogen can reach
The temperature range of LNG gasification, realizes the effect of simulation, and adopts LNG safer than directly.Specifically, described liquid nitrogen phase
Between change system and middle refrigerant circulation, cryogenic heat exchanger is set；Flake ice is set between described middle refrigerant circulation and sea water service system
Machine；Precool heat exchanger device is set between described liquid nitrogen Phase Transition Systems and sea water service system.Described sea water service system may include former sea water passage
With ice making residue concentrated seawater passage；According to actual needs, can set between former sea water passage and ice making residue concentrated seawater passage
Put one-level precool heat exchanger device, after described one-level precool heat exchanger device, set between described former sea water passage and liquid nitrogen Phase Transition Systems
Put two grades of precool heat exchanger devices.In order to ensure described device continuously run unimpeded, described freezing ice making unit inside former sea can be set
The power parts such as water pump, refrigerant pump.
In actual mechanical process：In described liquid nitrogen Phase Transition Systems, liquid nitrogen and middle refrigerant are after cryogenic heat exchanger heat exchange
Mutually it is changed into nitrogen, nitrogen and former seawater are discharged outdoor after carrying out heat exchange in precool heat exchanger device.In described middle refrigerant circulation, cold
Matchmaker and liquid nitrogen carry out heat exchange in cryogenic heat exchanger, carry out indirect heat exchange ice making subsequently into slice ice machine and former seawater；Described centre
Refrigerant can be selected for but is not limited to alcohol.In described sea water service system, former seawater and nitrogen carry out precooling, preferably former seawater respectively with
Ice making residue concentrated seawater and nitrogen carry out one-level precooling and two grades of precoolings, after precooling through slice ice machine water distributing tray be sprayed to its wall with
Refrigerant carries out indirect heat exchange, and prepared ice simultaneously produces concentrated seawater.
Device described in the utility model includes automatic control system.Described automatic control system and described freezing ice making unit
It is connected, Automated condtrol is carried out to freezing ice-making process.Described automatic control system passes through computer end real-time monitoring each node temperature
Degree, pressure and flow value, can adjust the flow of liquid nitrogen, middle refrigerant and former seawater by arranging valve V opening value, change
Medium temperature, and then affect the icing rate of seawater, change salt rejection rate and ice capacity.Furthermore, described automatically controlling is
System can also be by changing its flow to the setting of refrigerant pump, former seawater pump frequency, the salt rejection rate to seawater former during different flow
Carry out experimental study with ice capacity.Described automatic control system can also change slice ice machine by adjusting the frequency of motor
The frequency of ice scraped by middle skates, thus affecting the size that seawater is frozen, form and consistency, and then the salt rejection rate to refrigerating process
Produce impact.Preferably, described automatic control system is integrally controlled to device, that is, with described freezing ice making list
Unit, constant temperature gravity desalinization unit and centrifugation desalination unit are respectively connected with.
Adopt constant temperature gravity desalinization unit in the analogue experiment installation that the utility model provides, be to simulate different rings
Border temperature, the effect feasibility studied its impact to gravity desalting effect and carry out gravity desalinization using natural thermal source.Tool
For body, described constant temperature gravity desalinization unit includes thermostatic chamber and is placed in the indoor gravity desalinization groove of described constant temperature.Described heavy
Power salting out tank is placed on ice-melt balance (or ice-melt claims).The temperature of described thermostatic chamber can be adjusted by air heating/cooling device
Section.In practical operation, the product ice after freezing ice making is placed in described gravity desalinization groove, carries out the experiment of gravity desalinization；Institute
The lower end stating gravity desalinization groove is connected with brine tank, enters after brine tank by bittern in time, before and after can measuring desalination by balance
The quality of ice, calculates its difference thus calculating ice-melt rate.The temperature of described thermostatic chamber can pass through thermoregulator sets itself, and
Stable in -5 DEG C～50 DEG C of the interior in a big way air themperature holding making constant temperature indoor, therefore can study in Various Seasonal not
With under ambient temperature conditions, the impact to gravity salt rejection rate for the thawing rate, thus updating desalination scheme, and then lift a whole set of work
The desalting efficiency of skill.In experimentation, thawing rate can be controlled in computer end real-time query ice-melt balance registration.
Centrifugation desalination unit described in the utility model can be to the product ice of freezing ice making unit and constant temperature gravity desalinization unit
Product ice be centrifuged desalination experimental study further, least one set centrifuge can be adopted.In practical operation, can be using centrifugation
Machine rotating speed is interval to be 500～5000rpm, and centrifugation time is interval to be 1～5min, and effectively realizes ice-bittern while centrifugation
Separate.Described centrifugation desalination unit preferably employs detachable filter screen.
(3) beneficial effect
The desalination unit energy-saving and emission-reduction that the utility model provides, simple to operate, convenient to carry out, control system flexibly has
Desalination processes are controlled by effect by multivariable, multistage, multiple technologies means, thus the parameter to de-salting operation at different levels
It is optimized, new technology, contribute to the balance realized equipment with high desalinization and reduce the factors such as engineering cost, saving energy consumption, to the present
The research of freezing desalinization and large-scale industrial production have higher directive significance afterwards.
Brief description
Fig. 1 is the schematic flow sheet of experimental provision described in embodiment；Wherein, F represents flowmeter, and T represents temperature sensor,
P representative pressure sensor；
Fig. 2 is the schematic diagram of automatic control system described in embodiment and described freezing ice making unit corresponding part；Wherein, T
Represent temperature sensor, P representative pressure sensor, F represents flowmeter, and V represents flow control valve；
Fig. 3 is the schematic diagram of constant temperature gravity desalinization unit described in embodiment；Wherein, 1 is thermostatic chamber, and 2 is gravity salting out tank,
3 is support, and 4 is ice-melt balance, and 5 is brine tank, and 6 is air heating/cooling device, and 7 is water circulating pump, and 8 is evaporimeter/condensation
Device, 9 is water tank, and 10 is expansion valve, and 11 is condenser/evaporator, and 12 is cross valve, and 13 is oil-liquid separator, and 14 is compression
Machine.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is used for the utility model is described, but is not limited to scope of the present utility model.
Embodiment
Present embodiments provide a kind of processing simulation experimental provision based on LNG cold energy desalinization, including being linked in sequence
Freezing ice making unit, constant temperature gravity desalinization unit and centrifugation desalination unit；Described freezing ice making unit, constant temperature gravity desalinization
Unit and centrifugation desalination unit are all connected with automatic control system；
Described experimental provision schematic flow sheet is as shown in Figure 1；Specifically, described freezing ice making unit includes liquid nitrogen phase transformation
System, middle refrigerant circulation, former sea water passage and ice making residual seawater passage；
Wherein, between described liquid nitrogen Phase Transition Systems and middle refrigerant circulation, cryogenic heat exchanger is set, by indirect heat exchange
Liquid nitrogen phase is made to be changed into nitrogen middle refrigerant cooling simultaneously；
Wherein, slice ice machine is set between described middle refrigerant circulation and sea water service system, is made by indirect heat exchange middle cold
Matchmaker intensification seawater freezing Cheng Bing simultaneously, prepared ice enters in the ice bank being located at below slice ice machine；
Wherein, it is respectively provided with seawater between described former sea water passage and ice making residue concentrated seawater passage, liquid nitrogen Phase Transition Systems
One-level precool heat exchanger device and two-stage seawater precool heat exchanger device；Described seawater one-level precool heat exchanger device makes ice making by indirect heat exchange
Remaining concentrated seawater intensification former seawater cooling simultaneously；Described two-stage seawater precool heat exchanger device makes nitrogen temperature same by indirect heat exchange
When former seawater through one-level precooling continue cooling precooling；
The schematic diagram of described automatic control system and described freezing ice making unit corresponding part is as shown in Fig. 2 its laying side
Formula is corresponding with described freezing ice making unit；Including the temperature sensor of each node, pressure sensor, flowmeter, liquid
Nitrogen flow control valve, middle cold medium flux regulating valve, seawater flow regulating valve and slice ice machine frequency regulator；In practical operation
In, liquid nitrogen flow being adjusted by adjusting Vx opening value, thus changing liquid nitrogen and refrigerant heat exchange amount, and then changing salt rejection rate and product
Ice amount；Cold medium flux being adjusted by adjusting V1 opening value, thus changing refrigerant temperature, changing salt rejection rate and ice capacity；Can lead to
Overregulate V6 opening value and adjust former seawater flow, and then affect form, change salt rejection rate and the ice capacity of icing rate and ice；Adjust
Save V8 opening value and act synergistically with V6, thus it is possible to vary concentrated seawater and the heat exchange efficiency of former seawater, play and make full use of cold
Effect；
The schematic diagram of described constant temperature gravity desalinization unit is as shown in Figure 3；Including thermostatic chamber and positioned at described constant temperature
Gravity desalinization groove 2 in room 1；Described gravity desalinization groove 2 is positioned on ice-melt balance 4 by support 3, described gravity desalinization groove 2
Lower end be connected with brine tank 5；Air heating/cooling device 6 is adjusted to the temperature within described thermostatic chamber 1, described temperature
Occurrence can preset and be controlled by by thermoregulator；In order that air heating/cooling device 6 work steady in a long-term
Make, heating/cooling cycle system can be equipped with and be attached thereto, this system specifically includes water circulating pump 7, evaporator/condenser 8, stores
Water pot 9, expansion valve 10, condenser/evaporator 11, cross valve 12, oil-liquid separator 13, compressor 14；
In described centrifugation desalination unit, detachable filter screen is set；Described centrifugation desalination unit includes one group of centrifuge.
The equipment that the present embodiment provides can be optimized to the parameter of de-salting operation at different levels in actual applications, can be directed to
The regulation and control of LNG cold energy desalinization relevant parameter and research under property simulation large-scale production state, result of study can be used for referring to
Lead actual production.
Embodiment of above is merely to illustrate the utility model, and is not limitation of the utility model, relevant technology neck
The those of ordinary skill in domain, in the case of without departing from spirit and scope of the present utility model, can also make a variety of changes and
Modification, therefore all equivalent technical schemes fall within category of the present utility model, and scope of patent protection of the present utility model should
It is defined by the claims.
Claims (10)
1. a kind of processing simulation experimental provision based on LNG cold energy desalinization is it is characterised in that include the freezing being linked in sequence
Ice making unit, constant temperature gravity desalinization unit and centrifugation desalination unit；Described freezing ice making unit is equipped with automatic control system.
2. device according to claim 1 it is characterised in that described freezing ice making unit include liquid nitrogen Phase Transition Systems, in
Between refrigerant circulation and sea water service system；
Between described liquid nitrogen Phase Transition Systems and middle refrigerant circulation, cryogenic heat exchanger is set, liquid nitrogen phase transformation is made by indirect heat exchange
For nitrogen middle refrigerant cooling simultaneously；
Slice ice machine is set between described middle refrigerant circulation and sea water service system, so that middle refrigerant is heated up simultaneously by indirect heat exchange
Seawater freezing Cheng Bing；
Between described liquid nitrogen Phase Transition Systems and sea water service system, precool heat exchanger device is set, nitrogen temperature is made simultaneously by indirect heat exchange
Seawater cooling precooling.
3. device according to claim 1 it is characterised in that described freezing ice making unit include liquid nitrogen Phase Transition Systems, in
Between refrigerant circulation, former sea water passage and ice making residual seawater passage；
Between described liquid nitrogen Phase Transition Systems and middle refrigerant circulation, cryogenic heat exchanger is set, liquid nitrogen phase transformation is made by indirect heat exchange
For nitrogen middle refrigerant cooling simultaneously；
Slice ice machine is set between described middle refrigerant circulation and former sea water passage, so that middle refrigerant is heated up by indirect heat exchange same
When seawater freezing Cheng Bing；
It is respectively provided with one-level precool heat exchanger device between described former sea water passage and ice making residue concentrated seawater passage, liquid nitrogen Phase Transition Systems
With two grades of precool heat exchanger devices；Described one-level precool heat exchanger device makes ice making residue concentrated seawater intensification former sea simultaneously by indirect heat exchange
Water is lowered the temperature；Described two grades of precool heat exchanger devices make nitrogen temperature by indirect heat exchange, and former seawater continues cooling precooling simultaneously.
4. the device according to Claims 2 or 3 is it is characterised in that described automatic control system includes temperature sensor, pressure
Force snesor and flowmeter；
Also include flow control valve, refrigerant pump frequency regulator, former sea water pump frequency regulator and slice ice machine frequency regulator.
5. device according to claim 1 it is characterised in that described automatic control system also respectively with constant temperature gravity desalinization
Unit and centrifugation desalination unit are connected.
6. the device according to claim 1,2,3 or 5 is it is characterised in that described constant temperature gravity desalinization unit includes constant temperature
Room and the gravity desalinization groove being arranged at described constant temperature interior；Described gravity desalinization groove is placed on ice-melt balance.
7. device according to claim 6 is it is characterised in that the lower end of described gravity desalinization groove is connected with brine tank.
8. device according to claim 6 is it is characterised in that the temperature of described thermostatic chamber passes through air heating/cooling device
It is adjusted.
9. the device according to claim 1,2,3 or 5 is it is characterised in that described centrifugation desalination unit includes least one set
Centrifuge.
10. device according to claim 9 is it is characterised in that arrange detachable filter screen in described centrifugation desalination unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620833032.4U CN205953579U (en) | 2016-07-29 | 2016-07-29 | Technology simulation experiment device based on LNG cold energy seawater desalination |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620833032.4U CN205953579U (en) | 2016-07-29 | 2016-07-29 | Technology simulation experiment device based on LNG cold energy seawater desalination |
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| CN205953579U true CN205953579U (en) | 2017-02-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107140772A (en) * | 2017-06-20 | 2017-09-08 | 北京建筑大学 | A kind of compound method for desalting seawater and system based on cold energy of liquefied natural gas |
| CN108862448A (en) * | 2018-07-18 | 2018-11-23 | 浙江干氏制冷设备有限公司 | A kind of seawater desalination system |
-
2016
- 2016-07-29 CN CN201620833032.4U patent/CN205953579U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107140772A (en) * | 2017-06-20 | 2017-09-08 | 北京建筑大学 | A kind of compound method for desalting seawater and system based on cold energy of liquefied natural gas |
| CN108862448A (en) * | 2018-07-18 | 2018-11-23 | 浙江干氏制冷设备有限公司 | A kind of seawater desalination system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200817 Address after: 100027 Beijing, Chaoyangmen, North Street, No. 22, No. Co-patentee after: Beijing University of Civil Engineering and Architecture Patentee after: China Petroleum & Chemical Corp. Address before: 300457, Tianjin Binhai New Area First Avenue TEDA MSD-C1 block 7 Co-patentee before: Beijing University of Civil Engineering and Architecture Patentee before: SINOPEC TIANJIN LIQUEFACTION NATURAL GAS Co.,Ltd. |
|
| TR01 | Transfer of patent right |