CN109621480A - A kind of indirect type vacuum cooled decrease temperature crystalline system and method - Google Patents
A kind of indirect type vacuum cooled decrease temperature crystalline system and method Download PDFInfo
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- CN109621480A CN109621480A CN201910010747.8A CN201910010747A CN109621480A CN 109621480 A CN109621480 A CN 109621480A CN 201910010747 A CN201910010747 A CN 201910010747A CN 109621480 A CN109621480 A CN 109621480A
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- condenser
- tank
- compressor
- water
- secondary steam
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- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 39
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 23
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 23
- 239000004571 lime Substances 0.000 claims abstract description 23
- 230000006835 compression Effects 0.000 claims abstract description 21
- 238000007906 compression Methods 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 238000007701 flash-distillation Methods 0.000 claims abstract description 14
- 238000009833 condensation Methods 0.000 claims abstract description 6
- 230000005494 condensation Effects 0.000 claims abstract description 6
- 238000003860 storage Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 239000002904 solvent Substances 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract description 2
- 230000002045 lasting effect Effects 0.000 abstract description 2
- 239000007921 spray Substances 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- 239000013078 crystal Substances 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010025 steaming Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0018—Evaporation of components of the mixture to be separated
- B01D9/0022—Evaporation of components of the mixture to be separated by reducing pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D2009/0086—Processes or apparatus therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The present invention relates to a kind of indirect type vacuum cooled decrease temperature crystalline systems, including material liquid tank, secondary steam condenser, water tank, compressor, compression vapour condenser, throttle valve, vacuum pump, circulating pump, lime set tank.Low-temperature cold water is produced by way of compression extraction air flash distillation, the secondary steam indirect heat exchange in low-temperature cold water and material liquid tank to keep the lasting flash distillation of material liquid tank internal solvent, and realizes the decrease temperature crystalline of feed liquid.The produced secondary steam of feed liquid evaporation does not enter compressor when the system works, therefore can avoid corrosion of the corrosive materials to compressor drum.In addition, the cooling load of present system is only the heat for being evacuated condensation heat release and the transformation of compressor wasted work compared with conventional vapor sprays syringe pump method decrease temperature crystalline system, have the characteristics that cooling water amount is small, rate of temperature fall is fast, operation energy consumption is low.
Description
Technical field
The present invention relates to a kind of crystal system more particularly to a kind of indirect type vacuum cooled decrease temperature crystalline system and method,
Belong to crystallization technique field.
Background technique
For cooling and crystallizing process at home in every profession and trade using accounting for about 95%, conventional cooling crystallization is by low-temperature cold water
It is passed through into material kettle collet or coil pipe, temperature of charge is reduced by wall-type heat exchange mode, is formed and was crystallized after material cooling
Saturation degree simultaneously gradually precipitates crystal on dividing wall type cooling wall.Crystalline substance with the continuous progress of crystallization process, at cooling wall
Body layer progressive additive, attachment of the crystal layer on cooling wall increase the heat transfer resistance of process, drastically influence and cool
The production efficiency of crystallization, in addition, also needing periodically to carry out manual cleaning to the dirty layer of crystalline substance on material kettle collet or coil pipe.Therefore, often
It advises low-temperature cold water lowering temperature crystallization and there is the problems such as cooling period is long, production efficiency is low, field labor intensity is big.Patent
CN201610991905.9 discloses a kind of constant gradient decrease temperature crystalline system and its working method, mainly passes through compressor suction
Material pot and make material under subnormal ambient solvent flash of steam to realize to the decrease temperature crystalline of material, but object within the system
The secondary steam of material is directly contacted with compressor, and when containing corrosive substance in material, the drop of secondary steam entrainment can be right
Compressor causes corrosion failure, influences the stable operation of system.
Summary of the invention
The purpose of the present invention is aiming at the shortcomings of the prior art, provide a kind of indirect type vacuum cooled cooling
Crystal system and method.
A kind of indirect type vacuum cooled decrease temperature crystalline system and method, it is characterised in that: system includes material liquid tank, secondary steaming
Vapour condenser, water tank, compressor, compression vapour condenser, throttle valve, vacuum pump, circulating pump, lime set tank.
Gas outlet is equipped at the top of the material liquid tank, side wall is equipped with feed pipe, and bottom is equipped with drainage conduit, outlet at the top of material liquid tank
Mouth is connected with the hot side air inlet of secondary steam condenser, the hot side condensate outlet and lime set tank inlet of secondary steam condenser
It is connected；The water storage pot bottom liquid outlet is connected with pump entry, the cold side of circulating-pump outlet and secondary steam condenser into
Liquid mouth is connected, and the cold side liquid outlet of secondary steam condenser is connected with water storage pot sidewall water return outlet；Steam at the top of water tank goes out
Mouth is connected with compressor air intake, and compressor venthole is connected with the hot side air intake of compression vapour condenser, compresses vapour condenser
Hot side condensate outlet be connected with the lime set return port of water tank, and the throttle valve is installed on this connecting line；It is described true
The air inlet of sky pump is connected with the condensate outlet of lime set tank top exhaust outlet and compression vapour condenser respectively, and on connecting line
Shut-off valve is installed respectively.
Plate-type condenser, shell-and-tube cooler, spiral sheet condenser or contact can be used in the secondary steam condenser
Formula condenser.
Plate-type condenser, shell-and-tube cooler, spiral sheet condenser or contact can be used in the compression vapour condenser
Condenser.
The compressor uses Roots Compressor, screw compressor, centrifugal compressor or piston compressor.
The vacuum pump uses water ring vacuum pump or dry screw vacuum pump.
The present invention also provides a kind of working method of indirect type vacuum cooled decrease temperature crystalline system is as follows:
High temperature feed liquid is added in material liquid tank, opens compressor, vacuum pump and circulating pump；Under vacuum conditions, in material liquid tank
Water starts flash of steam in material and water tank；Compressor constantly aspirates the water vapour that water tank flashes off, so that water storage
Water in tank is in flash distillation cooling state always, and water temperature is minimum to be cooled to 0.5 DEG C, and flash distillation gained water vapour increases through compressor compresses
Enter compression vapour condenser heat rejection condensation after temperature, lime set is back to water tank after throttle valve.Material flash distillation gained in material liquid tank
Secondary steam enters secondary steam condenser, and is condensed by the low-temperature cold water in the water tank that is conveyed by circulating pump, secondary steaming
Vapour lime set enters lime set tank；Air and operation phase in startup stage system are leaked into the fixed gas of system by vacuum pump
Discharge system, to guarantee the required vacuum environment condition of system flash distillation.
Compared with prior art, the beneficial effects of the present invention are:
A kind of indirect type vacuum cooled decrease temperature crystalline system of the present invention, is produced by way of compression extraction air flash distillation
Secondary steam indirect heat exchange in low-temperature cold water, low-temperature cold water and material liquid tank, to keep the lasting flash distillation of material liquid tank internal solvent
The decrease temperature crystalline to feed liquid is realized in vaporization.The produced secondary steam of feed liquid evaporation does not enter compressor when the system works, therefore can
It avoids corrosive materials to the etching problem of compressor drum, has also widened answering for system while improving system run all right
Use range.Compared with conventional vapor sprays syringe pump method decrease temperature crystalline system, the cooling load of system is only secondary steam in the present invention
The heat of condensation and the transformation of compressor wasted work, it is no longer necessary to cooling a large amount of injection steam, therefore decrease temperature crystalline can be significantly reduced
The operating cost of system.In addition, system equipment of the invention is without the brilliant dirty cleaning problem of brilliant scar, field labor intensity is low, production is imitated
Rate is high, crystallographic epigranular is controllable.
Detailed description of the invention
Fig. 1 is a kind of indirect type vacuum cooled decrease temperature crystalline systematic schematic diagram of the invention
Fig. 2 is shell-and-tube secondary steam condenser structure schematic diagram in embodiment one
In figure, 1 is material liquid tank, and 2 be secondary steam condenser, and 3 be water tank, and 4 be compressor, 5 compression vapour condensers, 6
It is vacuum pump for throttle valve, 7,8 be circulating pump, and 9 be lime set tank；21 be hot side air inlet, and 22 be hot side condensate outlet, and 23 be cold
Side inlet, 24 be cold side liquid outlet.
Specific embodiment
The present invention is described in further details in the following with reference to the drawings and specific embodiments, example is served only for explaining this
Invention, is not intended to limit the scope of the present invention.
Embodiment one:
As shown in Figure 1, a kind of indirect type vacuum cooled decrease temperature crystalline system, including material liquid tank 1, secondary steam condenser 2,
Water tank 3, compressor 4, compression vapour condenser 5, throttle valve 6, vacuum pump 7, circulating pump 8, lime set tank 9.
Gas outlet is equipped at the top of the material liquid tank 1, side wall is equipped with feed pipe, and bottom is equipped with drainage conduit, total appearance of material liquid tank 1
Product is 50m3；As shown in Fig. 2, secondary steam condenser 2 uses shell-and-tube heat exchanger, heat exchange area 500m2, secondary steam is cold
Condenser 2 is equipped with hot side air inlet 21, hot side lime set mouth 22, cold side inlet 23 and cold side liquid outlet 24, and secondary steam walks tube side,
Cooling water walks shell side；1 top gas outlet of material liquid tank is connected with the hot side air inlet 21 of secondary steam condenser 2, and secondary steam is cold
The hot side condensate outlet 22 of condenser 2 is connected with 9 inlet of lime set tank；The circulating pump uses centrifugal pump, and metered flow is
400m3/ h, lift 32m, the 3 bottom liquid outlet of water tank are connected with 8 entrance of circulating pump, the outlet of circulating pump 8 and secondary steaming
The cold side inlet 23 of vapour condenser 2 is connected, the cold side liquid outlet 24 and 3 side wall water return outlet of water tank of secondary steam condenser 2
It is connected；The compressor 4 uses LC20000 type Roots Compressor, and nominal volume flow is 20m3/ s, driving motor power
For 280kW；The steam (vapor) outlet at 3 top of water tank is connected with 4 air intake of compressor, 4 venthole of compressor and compression vapour condenser 5
Hot side air intake be connected, the hot side condensate outlet of compression vapour condenser 5 is connected with the lime set return port of water tank 3, and herein
The throttle valve 6 is installed on connecting line；The compression vapour condenser 5 uses plate-type condenser, heat exchange area 600m2, pressure
The cold in-water temperature of contracting vapour condenser 5 is not higher than 30 DEG C, cooling water inflow 400m3/h；The vacuum pump 7 uses liquid-ring type
Vacuum pump, specified sucking rate are 1200m3/ h, the air inlet of vacuum pump 7 are cold with 9 top vent of lime set tank and compression vapour respectively
The condensate outlet of condenser 5 is connected, and installs shut-off valve respectively on connecting line.
A kind of working method of indirect type vacuum cooled decrease temperature crystalline system of the invention is as follows:
About 30m will be added in material liquid tank 13Feed liquid, 50~100 DEG C of feed liquid temperature；Open compressor 4, vacuum pump 7 and circulation
Pump 8；Compressor 4 aspirates the water flash distillation cooling that water tank 3 keeps it internal, and water temperature is minimum to be cooled to 0.5 DEG C, the pressure of compressor 4
Steam enters compression 5 exothermic condensation of vapour condenser after heating pressurization afterwards, and condensate liquid is back in water tank 3 after throttle valve 6；Pressure
The thermal discharge of contracting vapour condenser 5 is taken away by circulating cooling recirculated water；Low-temperature cold water in water tank 3 enters two by circulating pump 8
The shell-side of secondary steam condenser 2, and constantly cooling tube side by the secondary steam that is flashed off in material liquid tank 1；It is flashed in material liquid tank 1
The condensed lime set of secondary steam out enters lime set tank 9；Air and operation phase in startup stage system leak to system
Interior fixed gas is by 7 discharge system of vacuum pump, to guarantee the required vacuum environment condition of system flash distillation.
A kind of indirect type vacuum cooled decrease temperature crystalline system of the present embodiment, feed liquid evaporates produced secondary steam when work
Do not enter compressor, to can avoid corrosion of the corrosive materials to compressor drum.In addition, with conventional vapor injection syringe pump method drop
Warm crystal system is compared, and a kind of indirect type vacuum cooled decrease temperature crystalline system of the present embodiment also has cooling load small, cooling
The features such as water consumption is few, rate of temperature fall is fast, operation energy consumption is low.
Although above in association with attached drawing, invention has been described, and the invention is not limited to above-mentioned specific implementations
Mode, above-mentioned specific embodiment are only illustrative, rather than restrictive, and those skilled in the art are in this hair
Under bright enlightenment, without deviating from the spirit of the invention, many variations can also be made, these belong to guarantor of the invention
Protect range.
Claims (6)
1. a kind of indirect type vacuum cooled decrease temperature crystalline system, it is characterised in that:
Including material liquid tank (1), secondary steam condenser (2), water tank (3), compressor (4), compression vapour condenser (5), throttling
Valve (6), vacuum pump (7), circulating pump (8), lime set tank (9)；Gas outlet is equipped at the top of the material liquid tank, side wall is equipped with feed pipe,
Bottom is equipped with drainage conduit, and gas outlet is connected with the hot side air inlet of secondary steam condenser at the top of material liquid tank, secondary steam condensation
The hot side condensate outlet of device is connected with lime set tank inlet；The water storage pot bottom liquid outlet is connected with pump entry, circulation
Pump discharge is connected with the cold side inlet of secondary steam condenser, the cold side liquid outlet and water storage pot sidewall of secondary steam condenser
Water return outlet is connected；Steam (vapor) outlet at the top of water tank is connected with compressor air intake, compressor venthole and compression vapour condenser
Hot side air intake be connected, the hot side condensate outlet of compression vapour condenser is connected with the lime set return port of water tank, and connects herein
Adapter tube road is installed by the throttle valve；The air inlet of the vacuum pump respectively with lime set tank top exhaust outlet and compression vapour condenser
Condensate outlet be connected, and install shut-off valve respectively on connecting line.
2. a kind of indirect type vacuum cooled decrease temperature crystalline system as described in claim 1, it is characterised in that: the secondary steam
Plate-type condenser, shell-and-tube cooler, spiral sheet condenser or direct contact condenser can be used in condenser.
3. a kind of indirect type vacuum cooled decrease temperature crystalline system as claimed in claim 1 or 2, it is characterised in that: the compression
Plate-type condenser, shell-and-tube cooler, spiral sheet condenser or direct contact condenser can be used in vapour condenser.
4. a kind of indirect type vacuum cooled decrease temperature crystalline system a method according to any one of claims 1-3, it is characterised in that: the pressure
Contracting machine uses Roots Compressor, screw compressor, centrifugal compressor or piston compressor.
5. a kind of indirect type vacuum cooled decrease temperature crystalline system as described in claim 1-4 is any, it is characterised in that: described true
Sky pump uses water ring vacuum pump or dry screw vacuum pump.
6. a kind of working method of indirect type vacuum cooled decrease temperature crystalline system, it is characterised in that: feed liquid is added in high temperature feed liquid
In tank (1), compressor (4), vacuum pump (7) and circulating pump (8) are opened；Under vacuum conditions, the interior material of material liquid tank (1) and water storage
Tank (3) interior water starts flash of steam；Compressor (4) constantly aspirates the water vapour that water tank (3) flashes off, so that water tank
(3) water in is in flash distillation cooling state always, and water temperature is minimum to be cooled to 0.5 DEG C, and flash distillation gained water vapour is pressed through compressor (4)
Contracting enters compression vapour condenser (5) exothermic condensation after heating, lime set is back to water tank (3) after throttle valve (6)；Material liquid tank
(1) water tank (3) that interior material flash distillation gained secondary steam enters secondary steam condenser (2), and conveyed by circulating pump (8)
Interior low-temperature cold water is condensed, and secondary steam lime set enters lime set tank (9)；Air and operation phase in startup stage system are let out
Dew enters the fixed gas of system by vacuum pump (7) discharge system, to guarantee the required vacuum environment condition of system flash distillation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910010747.8A CN109621480A (en) | 2019-01-07 | 2019-01-07 | A kind of indirect type vacuum cooled decrease temperature crystalline system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910010747.8A CN109621480A (en) | 2019-01-07 | 2019-01-07 | A kind of indirect type vacuum cooled decrease temperature crystalline system and method |
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| Publication Number | Publication Date |
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| CN109621480A true CN109621480A (en) | 2019-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910010747.8A Pending CN109621480A (en) | 2019-01-07 | 2019-01-07 | A kind of indirect type vacuum cooled decrease temperature crystalline system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811156A (en) * | 2020-07-29 | 2020-10-23 | 天津乐科节能科技有限公司 | System and method for preparing low-temperature water through micropore flash evaporation |
| CN116179800A (en) * | 2023-03-31 | 2023-05-30 | 陕西向阳真空工程有限公司 | Low-temperature, low-pressure and low-cost steam jet vacuum pump unit system |
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| GB505580A (en) * | 1937-11-12 | 1939-05-12 | John Wildey Phipps | Improvements in or relating to vacuum distillation |
| NO20031111D0 (en) * | 2003-03-11 | 2003-03-11 | Abb Gas Technology As | System and method for controlling gas emissions from an oil storage tank |
| CN1454110A (en) * | 2000-08-10 | 2003-11-05 | 结晶技术有限公司 | Method and installation for continuous crystallization of liquids by freezing |
| US20040237527A1 (en) * | 2003-02-18 | 2004-12-02 | Yasuyoshi Kato | Exhaust heat recovery system |
| CN202921003U (en) * | 2012-11-13 | 2013-05-08 | 苏州凯新分离科技有限公司 | Heat-pump type vacuum evaporation and concentration system |
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| CN108553926A (en) * | 2018-01-25 | 2018-09-21 | 蓝旺节能科技（浙江）有限公司 | Feed liquid piece-rate system and feed liquid separation method |
| CN108837542A (en) * | 2018-06-28 | 2018-11-20 | 上海新奥新能源技术有限公司 | A kind of evaporation concentration system |
| CN210021231U (en) * | 2019-01-07 | 2020-02-07 | 天津乐科节能科技有限公司 | Indirect vacuum cooling crystallization system |
-
2019
- 2019-01-07 CN CN201910010747.8A patent/CN109621480A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB505580A (en) * | 1937-11-12 | 1939-05-12 | John Wildey Phipps | Improvements in or relating to vacuum distillation |
| CN1454110A (en) * | 2000-08-10 | 2003-11-05 | 结晶技术有限公司 | Method and installation for continuous crystallization of liquids by freezing |
| US20040237527A1 (en) * | 2003-02-18 | 2004-12-02 | Yasuyoshi Kato | Exhaust heat recovery system |
| NO20031111D0 (en) * | 2003-03-11 | 2003-03-11 | Abb Gas Technology As | System and method for controlling gas emissions from an oil storage tank |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811156A (en) * | 2020-07-29 | 2020-10-23 | 天津乐科节能科技有限公司 | System and method for preparing low-temperature water through micropore flash evaporation |
| CN111811156B (en) * | 2020-07-29 | 2021-08-06 | 天津乐科节能科技有限公司 | System and method for preparing low-temperature water through micropore flash evaporation |
| CN116179800A (en) * | 2023-03-31 | 2023-05-30 | 陕西向阳真空工程有限公司 | Low-temperature, low-pressure and low-cost steam jet vacuum pump unit system |
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Application publication date: 20190416 |