CN210261447U - Ultrasonic evaporative crystallization salt separation system for sodium chloride and sodium sulfate - Google Patents
Ultrasonic evaporative crystallization salt separation system for sodium chloride and sodium sulfate Download PDFInfo
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- CN210261447U CN210261447U CN201920545057.8U CN201920545057U CN210261447U CN 210261447 U CN210261447 U CN 210261447U CN 201920545057 U CN201920545057 U CN 201920545057U CN 210261447 U CN210261447 U CN 210261447U
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Abstract
The utility model relates to a salt system is divided in supersound formula evaporation crystallization of sodium chloride and sodium sulfate, its characterized in that: comprises a mixed salt waste water storage tank, an adjusting tank, a pretreatment device, an ultrasonic evaporative crystallization device, a condensation treatment device and a salt separation device. The utility model has the advantages of scientific and reasonable design, novel process both can realize the recycle of high salt waste water through this system and method, can realize salt resource recovery simultaneously.
Description
Technical Field
The utility model belongs to the technical field of waste water treatment and evaporative crystallization, a salt system is divided to high salt waste water evaporative crystallization is related to, in particular to salt system is divided to sodium chloride and sodium sulfate supersound formula evaporative crystallization.
Background
With the development of national economy, the discharge of high-salt organic wastewater not only seriously harms the environment, but also poses great threat to human health. The high-salt wastewater is different from other types of wastewater, the component difference is not too large, and the salt substances contained in the high-salt wastewater are mainly CI-、SO4 2-、Na+、Ca2+And (4) salt substances are obtained. In the process of wastewater discharge, salt separation and extraction can be carried out on salt substances in the high-salinity wastewater.
Because of the high content of salt and organic matters, the traditional wastewater treatment technology is difficult to obtain satisfactory effect. Therefore, such waste water is becoming a major and difficult point in waste water treatment today where water resources are increasingly scarce.
In the current high-salt organic wastewater treatment process, the treatment method comprises an incineration method, an electrochemical method, a membrane separation method, an evaporative crystallization method, an ion exchange method and the like. The most effective way for treating the high-salinity organic wastewater is to realize high-efficiency resource utilization on the basis of zero emission. To realize the final zero emission of the wastewater, the evaporative crystallization method is an irreplaceable process, and the method can realize the resource recovery of the salts at the same time. The evaporative crystallization method for treating the high-salinity organic wastewater can break through the conventional wastewater treatment technology, so that the recovered substances have higher utilization value, and the resource utilization and zero discharge of the wastewater are realized.
The ultrasonic technology is added into the wastewater treatment process as a pretreatment means, is favorable for realizing zero discharge of wastewater and realizing resource recovery of salts, and has important research significance for energy conservation, consumption reduction and environmental protection in China.
Through a search for a patent publication, no patent publication that is the same as the present patent application is found.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide a salt system is divided in sodium chloride and sodium sulfate supersound formula evaporation crystallization, both can realize the recycle of high salt waste water through this system and method, can realize salt resource recovery simultaneously.
The utility model provides a its technical problem realize through following technical scheme:
the ultrasonic evaporative crystallization salt separation system for sodium chloride and sodium sulfate is characterized in that: the salt mixing wastewater treatment device comprises a salt mixing wastewater storage tank, an adjusting tank, a pretreatment device, an ultrasonic evaporative crystallization device, a condensation treatment device and a salt separation device, wherein the pretreatment device comprises a dunfen reaction tank; the ultrasonic evaporative crystallization device comprises a preheater, a feed pump, an ultrasonic evaporative crystallization unit and a condenser which are sequentially connected through a pipeline, and the condensation treatment device comprises an intermediate adjusting tank, an electrocatalytic oxidation tank, an anaerobic treatment device and a biological sedimentation tank which are sequentially connected through a pipeline; the salt separating device comprises a precooling device, a freezing crystallizer, a first salt separating unit and a second salt separating unit, the first salt separating unit comprises a centrifuge, a dryer and a first collecting tank, the second salt separating unit comprises a comprehensive mother liquor tank, an ultrasonic evaporative crystallization unit and a thickening device, and the first salt separating unit and the second salt separating unit are connected in parallel and are connected to the precooling device and the freezing crystallizer together.
And the ultrasonic evaporative crystallization unit comprises a first-effect ultrasonic evaporative crystallization assembly, a second-effect ultrasonic evaporative crystallization assembly and a third-effect ultrasonic evaporative crystallization assembly, the first-effect ultrasonic evaporative crystallization assembly, the second-effect ultrasonic evaporative crystallization assembly and the third-effect ultrasonic evaporative crystallization assembly respectively comprise a heating chamber, a feed inlet, a secondary steam outlet, a concentrated solution outlet, a separator, a circulating pipe and an axial flow pump, and an ultrasonic transducer is arranged in the heating chamber.
The ultrasonic transducer includes a first ultrasonic transducer and a second ultrasonic transducer, which are respectively located at the top end and the bottom end of the heating chamber.
Furthermore, a third ultrasonic transducer is arranged in the separator.
Moreover, the power of the first ultrasonic transducer and the second ultrasonic transducer is 1.5 KW.
And the power of the third ultrasonic transducer is 0.5 KW.
And the pretreatment device also comprises an ultrasonic degradation tank which is connected to the dunfen reaction tank.
Also, the preheater includes a first preheater and a second preheater.
Moreover, the precooling device is a tube cooler.
The utility model discloses an advantage and beneficial effect do:
1. the utility model discloses a sodium chloride and sodium sulfate supersound formula evaporation crystallization divide salt system can break through waste water treatment in the past technique, adopts the evaporation crystallization method and combines together with ultrasonic wave technique on the basis of zero release, replaces traditional technology, realizes the resource recovery and the zero release of salt, has important research meaning to china's energy saving and consumption reduction and environmental protection.
2. The ultrasonic evaporative crystallization salt separation system for sodium chloride and sodium sulfate adopts the ultrasonic technology, the ultrasonic waves can fully break the impurity ions combined with the salt in the mixed brine, and the impurity ions are completely deposited at the bottom of the reaction tank through the synergistic effect of the ultrasonic degradation tank, so that the purity of the salt in the later period is favorably kept; meanwhile, the ultrasonic degradation tank can assist the Fenton reaction tank to decompose micromolecular organic matters, further remove organic matters which cannot be flocculated and precipitated by the medicament, and fully reduce the COD value of the mixed saline solution;
3. the utility model discloses a sodium chloride and sodium sulfate ultrasonic type evaporative crystallization divides salt system adopts ultrasonic type forced circulation evaporation plant for mixed salt waste water can fully evaporate, wherein first ultrasonic transducer and second ultrasonic transducer adopt 1.5KW, and mixed salt waste water produces violent disturbance under the ultrasonic cavitation effect, even produces atomization phenomenon, is favorable to improving heat transfer coefficient, can play the beneficial effect of preventing the heater scale deposit simultaneously; the third ultrasonic transducer adopts 0.5KW, which not only can prevent the gas-liquid from carrying and polluting the secondary steam condensate water, but also can be beneficial to maintaining the stable pressure drop on the upper part of the evaporation liquid level, and has the beneficial effect of obviously improving the evaporation strength.
4. The utility model discloses a salt system is divided to sodium chloride and sodium sulfate supersound formula evaporative crystallization, the mixed brine after handling through coprocessing device and supersound formula evaporative crystallization device reaches industry salt one-level standard at sodium sulfate crystal purity and the whiteness degree that produces after freezing crystallization, and the sodium chloride crystal purity that obtains reaches industry one-level salt standard, can effectively improve the performance of enterprises.
5. The utility model discloses technology and device have structural design rationally, and the process is novel, and the treatment regimen is unique, and industrial waste water treatment is efficient, can be favorable to realizing the resource recovery of waste water zero release and salt.
Drawings
FIG. 1 is a process flow diagram of the ultrasonic evaporative crystallization of the present invention;
FIG. 2 is a process flow diagram of the salt separation treatment of the present invention;
fig. 3 is a schematic structural diagram of the ultrasonic evaporative crystallization unit of the present invention.
Description of the reference numerals
1-mixed salt wastewater storage tank, 2-adjusting tank, 3-Fenton reaction tank, 4-ultrasonic degradation tank, 5-ultrasonic evaporative crystallization device, 6-intermediate adjusting tank, 7-electrocatalytic oxidation tank, 8-anaerobic device, 9-biological sedimentation tank, 10-precooling device, 11-freezing crystallizer, 12-centrifuge, 13-dryer, 14-comprehensive mother liquor tank, 15-thickening device, 16-one-effect ultrasonic forced circulation heating chamber, 17-third ultrasonic transducer, 18-one-effect ultrasonic separator, 19-secondary steam outlet, 20-two-effect ultrasonic forced circulation heating chamber, 21-two-effect ultrasonic separator, 22-three-effect ultrasonic forced circulation heating chamber, 23-three-effect ultrasonic crystallizer, 24-condenser, 25-condensate water outlet pipe, 26-concentrated solution outlet, 27-third axial pump, 28-circulating pipe, 29-second axial pump, 30-first ultrasonic transducer, 31-first axial pump, 32-feeding pump, 33-second preheater, 34-first preheater and 35-second ultrasonic transducer.
Detailed Description
The present invention will be described in further detail with reference to specific examples, which are provided for illustrative purposes only, and are not intended to be limiting, and the scope of the present invention should not be limited thereby.
A sodium chloride and sodium sulfate ultrasonic type evaporation crystallization salt separation system is innovative in that: the salt-mixing wastewater treatment device comprises a salt-mixing wastewater storage tank 1, an adjusting tank 2, a pretreatment device, an ultrasonic evaporative crystallization device 5, a condensation treatment device and a salt separation device, wherein the pretreatment device comprises a dunfen reaction tank 3, and the salt-mixing wastewater storage tank, the adjusting tank and the dunfen reaction tank are sequentially connected through a pipeline; the ultrasonic evaporative crystallization device comprises a preheater, a feed pump 32, an ultrasonic evaporative crystallization unit and a condenser 24 which are connected in sequence through pipelines, and a condensed water outlet pipe 25 of the condenser is connected to the condensation treatment device; the condensation treatment device comprises a middle adjusting tank 6, an electrocatalytic oxidation tank 7, an anaerobic treatment device 8 and a biological sedimentation tank 9 which are connected in sequence through pipelines; the salt separating device comprises a precooling device 10, a freezing crystallizer 11, a first salt separating unit and a second salt separating unit, the first salt separating unit comprises a centrifuge 12, a dryer 13 and a first collecting tank, the second salt separating unit comprises a comprehensive mother liquor tank 14, an ultrasonic evaporative crystallization unit and a thickening device 15, and the first salt separating unit and the second salt separating unit are connected in parallel and are connected to the precooling device and the freezing crystallizer together.
The ultrasonic evaporative crystallization unit comprises a first-effect ultrasonic evaporative crystallization component, a second-effect ultrasonic evaporative crystallization component and a third-effect ultrasonic evaporative crystallization component which are sequentially connected, wherein the first-effect ultrasonic evaporative crystallization component comprises a first-effect ultrasonic forced circulation heating chamber 16, a feed inlet, a secondary steam outlet 19, a first-effect ultrasonic separator 18, a circulating pipe 28 and a first axial flow pump 32, and the bottom end of the first-effect ultrasonic separator is connected to the first-effect ultrasonic forced circulation heating chamber through the circulating pipe and the first axial flow pump; the two-effect ultrasonic evaporative crystallization component comprises a two-effect ultrasonic forced circulation heating chamber 20, a feeding hole, a secondary steam outlet, a two-effect ultrasonic separator 21, a circulating pipe and a second axial flow pump 29, wherein the bottom end of the two-effect ultrasonic separator is connected to the two-effect ultrasonic forced circulation heating chamber through the circulating pipe and the second axial flow pump; the triple-effect ultrasonic evaporative crystallization component comprises a triple-effect ultrasonic forced circulation heating chamber 22, a feeding hole, a secondary steam outlet, a triple-effect ultrasonic crystallizer 23, a circulating pipe and a third axial flow pump 27, wherein the bottom end of the triple-effect ultrasonic crystallizer is connected to the triple-effect ultrasonic forced circulation heating chamber through the circulating pipe and the third axial flow pump; the secondary steam outlet of the first-effect ultrasonic separator is connected to the second-effect ultrasonic forced circulation heating chamber, the secondary steam outlet of the second-effect ultrasonic forced circulation heating chamber is connected to the third-effect ultrasonic forced circulation heating chamber, the concentrated solution outlet 26 of the first-effect ultrasonic forced circulation heating chamber, the second-effect ultrasonic forced circulation heating chamber and the third-effect ultrasonic forced circulation heating chamber is connected to the precooling device, and the ultrasonic transducers are arranged in the first-effect ultrasonic forced circulation heating chamber, the second-effect ultrasonic forced circulation heating chamber and the third-effect ultrasonic forced circulation heating chamber.
The ultrasonic transducer comprises a first ultrasonic transducer 30 and a second ultrasonic transducer 35 which are respectively positioned at the top end and the bottom end of the heating chamber, and the power of the first ultrasonic transducer and the power of the second ultrasonic transducer are 1.5KW, so that the heat exchange coefficient can be improved, and the scaling of the heater can be effectively prevented.
All be provided with third ultrasonic transducer 17 in first effect ultrasonic type separator, two effect ultrasonic type separator separators and the three effect ultrasonic type crystallizer, the power of third ultrasonic transducer is 0.5KW, not only can prevent that the gas-liquid from smuggleing the pollution secondary steam comdenstion water secretly, does benefit to moreover and maintains the steady pressure drop on evaporation liquid level upper portion, improves evaporation strength.
The pretreatment device also comprises an ultrasonic degradation tank 4, the ultrasonic degradation tank is connected to the Fenton reaction tank, a Fenton reagent added into the Fenton reaction tank becomes a free state in the mixed salt wastewater, and is not beneficial to the separation of salt in the later period; meanwhile, the ultrasonic degradation tank can assist the Fenton reaction tank to decompose micromolecular organic matters, organic matters which cannot be flocculated and precipitated by the medicament are further removed, and the COD value of the mixed saline solution is fully reduced.
The preheater includes first preheater 34 and second preheater 33, can carry out fully heating to the concentrate, improves the evaporation crystallization efficiency.
The precooling device is a tubular cooler, the concentrated solution enters a refrigerating device at the temperature of 30-35 ℃ after exchanging heat with cooling water, and the refrigerating fluid introduced into the refrigerating device can reduce the temperature of the concentrated solution to about 5 ℃, so that the aggregation of sodium sulfate grains and the generation of large-area crystallization are facilitated.
The utility model discloses a working process does:
1) pretreatment of high-salinity wastewater:
a. the mixed salt wastewater enters an adjusting tank through a pipeline, and acid and alkali agents are added into the adjusting tank, so that the PH of the mixed salt wastewater is kept neutral or weakly alkaline;
b. after the PH is adjusted, the mixed salt wastewater enters a Fenton reaction tank, a Fenton reagent in the Fenton reaction tank oxidizes and decomposes organic matters in the mixed salt wastewater, meanwhile, the degradation treatment is further carried out by means of an ultrasonic degradation tank, and the COD value of the mixed salt wastewater after the synergistic treatment is maintained at 500-800 ppm;
2) ultrasonic evaporative crystallization:
the pretreated mixed salt wastewater enters an ultrasonic evaporative crystallization device, the device is a triple-effect ultrasonic forced circulation evaporation device, the mixed salt wastewater is close to the boiling point after passing through a primary preheater and a secondary preheater and enters a primary-effect ultrasonic forced circulation heater for heat exchange, the mixed salt wastewater reaching the boiling point is evaporated and separated in a primary-effect ultrasonic separator, the generated secondary steam is used as the heating steam of a secondary-effect ultrasonic forced circulation heater, the mixed salt wastewater sequentially passes through the secondary-effect and triple-effect ultrasonic forced circulation heaters and enters a triple-effect ultrasonic crystallizer after reaching the supersaturated state, the concentrated salt water in the triple-effect ultrasonic crystallizer is deposited and crystallized to form concentrated solution containing crystal slurry, and meanwhile, condensed water is generated;
3) and (3) evaporating condensed water:
condensed water generated by the ultrasonic evaporative crystallization device is treated by the electrocatalytic oxidation tank, the anaerobic device, the aerobic device and the biological sedimentation tank to reach the standard of industrial water discharge, and the condensed water can be discharged or recycled;
4) salt separation treatment:
cooling the concentrated solution containing the crystal mush by a precooling device, then, enabling the cooled concentrated solution to enter a freezing crystallizer, crystallizing a large amount of sodium sulfate decahydrate in the freezing crystallizer due to different temperature sensitivities of the solubility of sodium chloride and the sodium sulfate, dehydrating the freezing solution by a centrifugal machine to generate salt mainly comprising the sodium sulfate decahydrate, and removing water and crystal water in crystal salt by a dryer to obtain anhydrous sodium sulfate; and (3) further evaporating and concentrating the mother liquor collected by the comprehensive mother liquor tank by using an ultrasonic evaporation crystallization device, pumping the mother liquor into a thickening device for growing crystals, and crystallizing the solution in a large area to obtain sodium chloride crystals.
Although the present invention discloses the embodiments and the accompanying drawings, those skilled in the art can understand that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims, and therefore, the scope of the present invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (9)
1. The ultrasonic evaporative crystallization salt separation system for sodium chloride and sodium sulfate is characterized in that: the salt mixing wastewater treatment device comprises a salt mixing wastewater storage tank, an adjusting tank, a pretreatment device, an ultrasonic evaporative crystallization device, a condensation treatment device and a salt separation device, wherein the pretreatment device comprises a dunfen reaction tank; the ultrasonic evaporative crystallization device comprises a preheater, a feed pump, an ultrasonic evaporative crystallization unit and a condenser which are sequentially connected through a pipeline, and the condensation treatment device comprises an intermediate adjusting tank, an electrocatalytic oxidation tank, an anaerobic treatment device and a biological sedimentation tank which are sequentially connected through a pipeline; the salt separating device comprises a precooling device, a freezing crystallizer, a first salt separating unit and a second salt separating unit, the first salt separating unit comprises a centrifuge, a dryer and a first collecting tank, the second salt separating unit comprises a comprehensive mother liquor tank, an ultrasonic evaporative crystallization unit and a thickening device, and the first salt separating unit and the second salt separating unit are connected in parallel and are connected to the precooling device and the freezing crystallizer together.
2. The ultrasonic evaporative crystallization salt separation system for sodium chloride and sodium sulfate according to claim 1, wherein: the ultrasonic evaporative crystallization unit comprises a first-effect ultrasonic evaporative crystallization assembly, a second-effect ultrasonic evaporative crystallization assembly and a third-effect ultrasonic evaporative crystallization assembly, the first-effect ultrasonic evaporative crystallization assembly, the second-effect ultrasonic evaporative crystallization assembly and the third-effect ultrasonic evaporative crystallization assembly respectively comprise a heating chamber, a feeding port, a secondary steam outlet, a concentrated solution outlet, a separator, a circulating pipe and an axial flow pump, and an ultrasonic transducer is arranged in the heating chamber.
3. The ultrasonic evaporative crystallization salt separation system for sodium chloride and sodium sulfate according to claim 2, wherein: the ultrasonic transducer comprises a first ultrasonic transducer and a second ultrasonic transducer which are respectively positioned at the top end and the bottom end of the heating chamber.
4. The ultrasonic evaporative crystallization salt separation system for sodium chloride and sodium sulfate according to claim 2, wherein: and a third ultrasonic transducer is arranged in the separator.
5. The ultrasonic evaporative crystallization salt separation system for sodium chloride and sodium sulfate according to claim 3, wherein: the power of the first ultrasonic transducer and the second ultrasonic transducer is 1.5 KW.
6. The ultrasonic evaporative crystallization salt separation system for sodium chloride and sodium sulfate according to claim 4, wherein: the power of the third ultrasonic transducer is 0.5 KW.
7. The ultrasonic evaporative crystallization salt separation system for sodium chloride and sodium sulfate according to claim 1, wherein: the pretreatment device also comprises an ultrasonic degradation tank, and the ultrasonic degradation tank is connected to the ton reaction tank.
8. The ultrasonic evaporative crystallization salt separation system for sodium chloride and sodium sulfate according to claim 1, wherein: the preheater comprises a first preheater and a second preheater.
9. The ultrasonic evaporative crystallization salt separation system for sodium chloride and sodium sulfate according to claim 1, wherein: the pre-cooling device is a tube type cooler.
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| CN110040908A (en) * | 2019-04-22 | 2019-07-23 | 天津科技大学 | A kind of sodium chloride and sodium sulphate ultrasonic type evaporative crystallization divide salt system and method |
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| CN110040908A (en) * | 2019-04-22 | 2019-07-23 | 天津科技大学 | A kind of sodium chloride and sodium sulphate ultrasonic type evaporative crystallization divide salt system and method |
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