CN204824179U - Potassium dihydrogen phosphate solution evaporation crystallization equipment - Google Patents
Potassium dihydrogen phosphate solution evaporation crystallization equipment Download PDFInfo
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- CN204824179U CN204824179U CN201520535042.5U CN201520535042U CN204824179U CN 204824179 U CN204824179 U CN 204824179U CN 201520535042 U CN201520535042 U CN 201520535042U CN 204824179 U CN204824179 U CN 204824179U
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- dihydrogen phosphate
- potassium dihydrogen
- separator
- heat exchanger
- main heat
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The utility model discloses a potassium dihydrogen phosphate solution evaporation crystallization equipment, it includes preheating device, evaporation plant and crystal separation device. Potassium dihydrogen phosphate solution evaporation crystallization equipment replaced traditional steam heating's evaporation crystallization mode, the flash steam that adoption compressor compressed cooling crystallizer discharged out, flash steam after the use compression is as heating steam, and the circulation of equipment self has been realized through setting up the return circuit, steam heating has been accomplished need not to give birth to, need not condensation device, only need a small amount of electric energy just can reach the effect of good evaporation, thereby be potassium dihydrogen phosphate solution treatment in -process reduce cost, a new way has been opened up to the energy saving.
Description
Technical field
The utility model relates to the condensing crystal technical field of solution, is specifically related to a kind of potassium dihydrogen phosphate evaporation crystallization equipment.
Background technology
Potassium dihydrogen phosphate crystallization adopts evaporating and concentrating process usually, and traditional technology steam consumption is high, and potassium dihydrogen phosphate produces corrosion to material.Based on this, when adopting evaporation technology to evaporate, equipment material selects corrosion resistant stainless steel.In recent years, because steam price rapidly goes up, the process energy consumption cost of traditional evaporation technology makes vast enterprise increased pressure, can't bear the heavy load.
Utility model content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of potassium dihydrogen phosphate evaporation crystallization equipment, by the self-circulation between main heat exchanger and separator, adopt the secondary steam that compressor compresses crystal separator gives off, use the secondary steam after compression to use as heating steam, realize the object of evaporation concentration, thus save energy, reduce costs, enhance productivity.
For solving the problem, the technical scheme that the utility model adopts is as follows:
A kind of potassium dihydrogen phosphate evaporation crystallization equipment, it comprises primary heater unit, evaporation unit and Crystallization Separation device;
Described primary heater unit comprises material buffer tank and preheater, and potassium dihydrogen phosphate enters material buffer tank and pumps in preheater through carrier pipe and carry out preheating;
Described evaporation unit comprises main heat exchanger, separator, vapour compressor and chilled water tank, wherein, the discharge end of preheater is connected on the feed end of main heat exchanger after condensing heat exchanger, main heat exchanger is connected with separator and forms loop line, potassium dihydrogen phosphate after preheating in loop line cocycle through main heat exchanger and separator, constantly isolate the concentrated solution of steam and high saturation, especially, between the vapour outlet of described separator and main heat exchanger, also vapour compressor is set, the steam that separator is separated enters vapour compressor adiabatic compression, reenter main heat exchanger cycle heat exchange, vapor condensation Cheng Shuihou enters chilled water tank, chilled water tank is connected on the condensation-water drain of main heat exchanger by hydraulic pipe,
Described Crystallization Separation device comprises cooling crystallizer and sedimentator device, cooling crystallizer and sedimentator device are connected to the discharge end of separator in turn by a discharging pump, the concentrated solution reaching hypersaturated state pumps into cooling crystallizer crystallization, and isolates crystal through sedimentator device.
The utility model can also pass through following scheme implementation:
Preferred scheme is had as one of the present utility model, described main heat exchanger and separator connect and compose a loop line by pipeline, pipeline is provided with a recycle pump, potassium dihydrogen phosphate after preheating enters main heat exchanger and heating steam heat exchange, the potassium dihydrogen phosphate obtaining heat enters separator flash separation and goes out secondary steam and concentrated solution, concentrated solution reenters loop line by recycle pump effect, constantly through main heat exchanger and separator flash separation effect, finally reach hypersaturated state and pump into cooling crystallizer from separator and carry out crystallization.
Preferred scheme is had as one of the present utility model, described chilled water tank is provided with cooling water outlet, cooling water outlet is connected on preheater after a distilled water pump, and the water coolant that chilled water tank is discharged provides heat exchange thermal source through preheater, and the water coolant after heat exchange is from the pollution-free discharge of preheater.
Have preferred scheme as one of the present utility model, connected by carrier pipe between described material buffer tank and preheater, carrier pipe is provided with fresh feed pump, and material exports from material buffer tank, pumps into preheater carry out preheating through fresh feed pump.
Have preferred scheme as one of the present utility model, described sedimentator device and be provided with second servo loop between separator, second servo loop is provided with mother liquor pump, and the mother liquor obtained after sedimentator is pumped in separator through mother liquor and circulates.
Compared to existing technology, the beneficial effects of the utility model are: potassium dihydrogen phosphate evaporation crystallization equipment described in the utility model instead of traditional steam-heated evaporation and crystallization mode, adopt the secondary steam that compressor compresses cooling crystallizer gives off, use the secondary steam after compression as heating steam, and the circulation of equipment self is achieved by arranging loop, accomplish without the need to raw steam heating, without the need to condensing equipment, only need a small amount of electric energy just can reach the effect of good evaporation, thus reduce costs in potassium dihydrogen phosphate treating processes, save energy opens a new way.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model preferred implementation.
Embodiment
As shown in Figure 1, potassium dihydrogen phosphate evaporation crystallization equipment described in the utility model, it comprises primary heater unit, evaporation unit and Crystallization Separation device;
Described primary heater unit comprises material buffer tank 1, preheater 3, and material buffer tank 1 is connected by one section of carrier pipe with preheater 3, described carrier pipe is provided with fresh feed pump 2;
Described evaporation unit comprises main heat exchanger 4, separator 5, vapour compressor 6 and chilled water tank 8; The feed end of described main heat exchanger 4 connects the discharge end of preheater 3; Separator 5 is connected with main heat exchanger 4 and forms loop line, described loop line is provided with recycle pump 7, concentrated solution after separator 5 is separated is entered into separator 5 again after being entered by recycle pump 7 in main heat exchanger 4 and evaporating and isolates concentrated solution, and concentrated solution is circulated between main heat exchanger 4 and separator 5 by loop line; The vapour outlet of described separator 5 connects the inlet mouth of vapour compressor 6 by one section of pneumatic tube, the air outlet of vapour compressor 6 is communicated with main heat exchanger 4, and the condensation-water drain of main heat exchanger 4 connects chilled water tank 8 by hydraulic pipe;
Described Crystallization Separation device comprises crystallizer 12, centrifuge apparatus 13, and crystallizer 12 and centrifuge apparatus 13 are connected to the discharge end of separator in turn by a discharging pump 11.
Adopt the technique of device condensing crystal potassium dihydrogen phosphate described in the utility model as follows: the temperature in material buffer tank 1 is room temperature, potassium dihydrogen phosphate stoste pumps into preheater 3 through fresh feed pump 2 and produces heat exchange with water coolant in preheater 3, and after preheater 3, temperature rises; Potassium dihydrogen phosphate after preheating enters into main heat exchanger 4, and circulated in main heat exchanger 4 and separator 5 by recycle pump 7, with heating steam heat exchange in main heat exchanger 4, the potassium dihydrogen phosphate absorbing heat enters flash distillation in separator 5, and isolate secondary steam and concentrated solution, secondary steam enters vapour compressor 6 from separator 5 vapour outlet, and after the adiabatic compression of vapour compressor 6, temperature and pressure gets a promotion; Secondary steam after increasing temperature and pressure enters main heat exchanger 4 and potassium dihydrogen phosphate heat exchange as heating steam, is condensed into water, and enters chilled water tank 8 after heat release; The potassium dihydrogen phosphate absorbing heat enters flash distillation in separator 5 and isolates secondary steam and concentrated solution, pump into stirred crystallization in crystallizer 12 through discharging pump 11 when the concentration of potassium dihydrogen phosphate reaches more than 35%, then isolate potassium dihydrogen phosphate crystal through crystallizer 12 and centrifuge apparatus 13; Can reuse or qualified discharge from the last water coolant out of preheater.
The utility model can also pass through following scheme implementation:
As the preferred scheme of one of the present utility model, described chilled water tank 8 is provided with cooling water outlet, and the feed-water end of a distilled water pump 9 is connected to the cooling water outlet of chilled water tank 8 by hydraulic pipe, and the water side of distilled water pump 9 is connected on preheater 3.Because water out also has certain temperature from chilled water tank 8, if directly discharge can cause the waste of thermal source, the water in chilled water tank 8 is incorporated in preheater 3, as the thermal source of preheater 3, thus the object making full use of heat can be reached.
As the preferred scheme of one of the present utility model, described centrifuge apparatus 13 and be provided with loop between separator 5, loop is provided with mother liquor pump 14, the mother liquor obtained after whizzer through mother liquor pump 14 be sent in separator 5 circulate.Mother liquor after separation is saturated potassium dihydrogen phosphate, direct discharge may cause potassium dihydrogen phosphate to reclaim not exclusively, discharge after stain environment, therefore after designing second servo loop, mother liquor enters into separator by second servo loop, and then between separator and main heat exchanger, circulation is concentrated, to reach after predetermined concentration Crystallization Separation again, circulation like this, finally realizes the process completely of potassium dihydrogen phosphate.
As the preferred scheme of one of the present utility model, the condensation-water drain of described preheater 3 is connected with rising pipe.The water of condensation eventually passed after preheater hot exchange is discharged through rising pipe.
Above-mentioned embodiment is only preferred implementation of the present utility model; can not limit the scope of the utility model protection with this, change and the replacement of any unsubstantiality that those skilled in the art does on basis of the present utility model all belong to the utility model scope required for protection.
Claims (5)
1. a potassium dihydrogen phosphate evaporation crystallization equipment, comprises primary heater unit, evaporation unit and Crystallization Separation device, it is characterized in that:
Described primary heater unit comprises material buffer tank and preheater, and potassium dihydrogen phosphate enters material buffer tank and pumps in preheater through carrier pipe and carry out preheating;
Described evaporation unit comprises main heat exchanger, separator, vapour compressor and chilled water tank, wherein, the discharge end of preheater is connected on the feed end of main heat exchanger after condensing heat exchanger, main heat exchanger is connected with separator and forms loop line, potassium dihydrogen phosphate after preheating in loop line cocycle through main heat exchanger and separator, constantly isolate the concentrated solution of steam and high saturation, especially, between the vapour outlet of described separator and main heat exchanger, also vapour compressor is set, the steam that separator is separated enters vapour compressor adiabatic compression, reenter main heat exchanger cycle heat exchange, vapor condensation Cheng Shuihou enters chilled water tank, chilled water tank is connected on the condensation-water drain of main heat exchanger by hydraulic pipe,
Described Crystallization Separation device comprises cooling crystallizer and sedimentator device, cooling crystallizer and sedimentator device are connected to the discharge end of separator in turn by a discharging pump, the concentrated solution reaching hypersaturated state pumps into cooling crystallizer crystallization, and isolates crystal through sedimentator device.
2. a kind of potassium dihydrogen phosphate evaporation crystallization equipment according to claim 1, it is characterized in that: described main heat exchanger and separator connect and compose a loop line by pipeline, pipeline is provided with a recycle pump, potassium dihydrogen phosphate after preheating enters main heat exchanger and heating steam heat exchange, the potassium dihydrogen phosphate obtaining heat enters separator flash separation and goes out secondary steam and concentrated solution, concentrated solution reenters loop line by recycle pump effect, constantly through main heat exchanger and separator flash separation effect, finally reach hypersaturated state to pump into cooling crystallizer from separator and carry out crystallization.
3. a kind of potassium dihydrogen phosphate evaporation crystallization equipment according to claim 1, it is characterized in that: described chilled water tank is provided with cooling water outlet, cooling water outlet is connected on preheater after a distilled water pump, the water coolant that chilled water tank is discharged provides heat exchange thermal source through preheater, and the water coolant after heat exchange is from the pollution-free discharge of preheater.
4. a kind of potassium dihydrogen phosphate evaporation crystallization equipment according to claim 1, it is characterized in that: connected by carrier pipe between described material buffer tank and preheater, carrier pipe is provided with fresh feed pump, potassium dihydrogen phosphate exports from material buffer tank, pumps into preheater carry out preheating through fresh feed pump.
5. a kind of potassium dihydrogen phosphate evaporation crystallization equipment according to claim 1, it is characterized in that: between described sedimentator device and separator, be provided with loop, loop is provided with mother liquor pump, and the mother liquor obtained after sedimentator is pumped in separator through mother liquor and circulates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520535042.5U CN204824179U (en) | 2015-07-22 | 2015-07-22 | Potassium dihydrogen phosphate solution evaporation crystallization equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520535042.5U CN204824179U (en) | 2015-07-22 | 2015-07-22 | Potassium dihydrogen phosphate solution evaporation crystallization equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204824179U true CN204824179U (en) | 2015-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520535042.5U Active CN204824179U (en) | 2015-07-22 | 2015-07-22 | Potassium dihydrogen phosphate solution evaporation crystallization equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204824179U (en) |
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2015
- 2015-07-22 CN CN201520535042.5U patent/CN204824179U/en active Active
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