CN212050612U - Double-waste water evaporation crystallization device - Google Patents
Double-waste water evaporation crystallization device Download PDFInfo
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- CN212050612U CN212050612U CN202020470384.4U CN202020470384U CN212050612U CN 212050612 U CN212050612 U CN 212050612U CN 202020470384 U CN202020470384 U CN 202020470384U CN 212050612 U CN212050612 U CN 212050612U
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Abstract
The utility model relates to a two waste water evaporative crystallization devices, including first raw materials storage tank, second raw materials storage tank, the pre-heater device, exhaust steam pre-heater, first raw materials collection device, second raw materials collection device, the demister, evaporative condensing unit and the one-effect evaporator who connects gradually, two-effect evaporator, three-effect evaporator, first raw materials storage tank, the pre-heater device, one-effect evaporator, first raw materials collection device connects gradually, second raw materials storage tank, exhaust steam pre-heater, two-effect evaporator, three-effect evaporator, second raw materials collection device connects gradually, three-effect evaporator's play steam ports in proper order with the steam inlet of exhaust steam, the demister, evaporative condensing unit connects, two-effect evaporator's liquid outlet is further connected through the inlet of evaporative condensing unit and pre-heater device. The utility model discloses can carry out the simultaneous processing of two waste waters, the moisture that evaporates can be recycle respectively again, reduces the public work consumption, and energy saving and emission reduction realizes serialization production.
Description
Technical Field
The utility model relates to an evaporation crystallization device technical field especially relates to a two waste water evaporation crystallization devices.
Background
The evaporative crystallization device is widely applied to the treatment of wastewater in the industries such as chemical industry, non-ferrous metal industry, pesticide industry, food industry, pharmaceutical industry, ammonia desulphurization, mine smelting, steel mill, oil field and the like, and the pure environmental protection treatment and the standard discharge deepening are changed into environmental protection treatment and comprehensive utilization through the recovery of crystals in the wastewater. And (3) crystallizing and recycling ammonium chloride, sodium chloride, ammonium sulfate and the like in the wastewater.
The existing evaporative crystallization device can only treat single wastewater at each time, and can not realize simultaneous treatment of multiple kinds of wastewater, so that the treatment timeliness is poor, the investment cost is high, and the consumption of public works (such as steam and circulating water) is high.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a simultaneous processing that can carry out two waste waters, the moisture that evaporates can be recycle respectively again, reduces the public work consumption, and energy saving and emission reduction realizes the two waste water evaporation crystallization devices that can serialization production.
The utility model provides a two waste water evaporative crystallization devices, including first raw materials storage tank, second raw materials storage tank, pre-heater device, exhaust steam pre-heater, first raw materials collection device, second raw materials collection device, demister, evaporative condensing unit and the one-effect evaporator, two-effect evaporator, the three-effect evaporator that connect gradually, first raw materials storage tank, pre-heater device, one-effect evaporator, first raw materials collection device connect gradually, second raw materials storage tank, exhaust steam pre-heater, two-effect evaporator, three-effect evaporator, second raw materials collection device connect gradually, three-effect evaporator's play steam ports in proper order with exhaust steam pre-heater's steam inlet, demister, evaporative condensing unit connect, two-effect evaporator's liquid outlet is further connected with the inlet of pre-heater device through evaporative condensing unit.
Preferably, the first raw material collecting device comprises a first thickener, a first centrifugal unit and a first mother liquor tank which are sequentially connected, a discharge port of the first-effect evaporator is connected with the first thickener through a first-effect discharge pump, and the first mother liquor tank is further connected with a feed port of the first-effect evaporator through a first mother liquor pump.
In any one of the above schemes, preferably, the second raw material collecting device includes a second thickener, a second centrifuge, and a second mother liquor tank, which are connected in sequence, the discharge port of the triple-effect evaporator is connected with the second thickener through a triple-effect discharge pump, and the second mother liquor tank is further connected with the feed port of the triple-effect evaporator through a second mother liquor pump.
The preferred of any above-mentioned scheme is, the pre-heater device includes secondary steam comdenstion water pre-heater, raw steam comdenstion water pre-heater's discharge gate is connected with the feed inlet of a single-effect evaporator, raw steam comdenstion water pre-heater's inlet is connected with the liquid outlet of a single-effect evaporator, secondary steam comdenstion water pre-heater's feed inlet and first raw materials storage tank are connected, secondary steam comdenstion water pre-heater's discharge gate and raw steam comdenstion water pre-heater.
It is preferred in any of the above-mentioned schemes, the evaporation condensing equipment includes evaporative condenser, condensation water pitcher, vacuum pump buffer tank, vacuum pump, be equipped with mutually independent first cavity, second cavity in the condensation water pitcher, evaporative condenser's steam inlet and demister are connected, evaporative condenser's liquid outlet and the inlet of first cavity are connected, the liquid outlet of first cavity is connected with secondary vapour condensate water pre-heater's inlet through first condensate water pump, the liquid outlet of triple effect evaporimeter is connected with the inlet of second cavity, the liquid outlet of second cavity is connected with second condensate water pump, the extraction opening and vacuum pump buffer tank, the vacuum pump of condensation water pitcher are connected gradually.
In any of the above schemes, preferably, the first-effect evaporator includes a first-effect heating chamber, a first-effect separation chamber, and a first-effect axial-flow pump, which are connected in sequence to form a cycle, and the second-effect evaporator includes a second-effect heating chamber, a second-effect separation chamber, and a second-effect axial-flow pump, which are connected in sequence to form a cycle; the triple-effect evaporator comprises a triple-effect heating chamber, a triple-effect separation chamber and a triple-effect axial-flow pump which are sequentially connected to form a circulation.
In any of the above schemes, preferably, the bottom of the triple-effect separation chamber is connected with a salt leg, the bottom of the salt leg is provided with a back-washing port, and the back-washing port is connected with a back-washing pipeline.
Compared with the prior art, the utility model has the advantages and beneficial effects do:
1. the double-wastewater treatment can be realized simultaneously, the equipment investment cost is reduced, the public engineering consumption is reduced, only single wastewater can be treated according to the requirement, the operation flexibility is high, and the adaptability is strong.
2. Through adopting pre-heater unit, exhaust steam pre-heater, realize that the material preheats, reduce the steam volume that the material consumed because of rising temperature, reduce the condensate water temperature who goes out the system simultaneously.
3. Through increasing the demister for get rid of the liquid foam that smugglies secretly in the secondary steam, to prevent that secondary steam from leading to the fact follow-up comdenstion water belting because of the liquid foam of smuggleing secretly, thereby influence the working property and the treatment effect of follow-up equipment.
4. The condensate water tank can realize the respective recycling of condensate water by adopting a double-chamber structure, one part of condensate water provides a heat source for the secondary steam condensate water preheater, and one part of condensate water is discharged to the next process, so that the investment is saved, and the occupied area is reduced.
5. When the equipment is in operation or is stopped, the back washing pump pumps diluted stock solution or gas into the salt leg through the back washing port, fine crystals in the salt leg float again to enter a crystal growth area, and qualified large particles cannot be washed away and fall to the bottom of the salt leg, so that the crystallization quality and the particle size of a product are ensured to be uniform, and fine crystals are not mixed. And simultaneously, the product is washed once to wash the crystals adhered to the inner wall of the salt leg so as to reduce the internal blockage phenomenon.
The double-waste water evaporation crystallization device of the present invention will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a structural diagram of a double-waste water evaporative crystallization device of the present invention;
wherein: 1. a first feeding pump; 2. a second feeding pump; 3. a secondary steam condensate water preheater; 4. a raw steam condensate water preheater; 5. a single-effect heating chamber; 6. a primary separation chamber; 7. an efficient axial flow pump; 8. a first effect discharge pump; 9. a two-effect heating chamber; 10. a two-effect separation chamber; 11. a two-way axial flow pump; 12. a triple-effect heating chamber; 13. a triple effect separation chamber; 14. a three-effect axial flow pump; 15. a triple-effect discharge pump; 16. a dead steam preheater; 17. a demister; 18. an evaporative condenser; 19. a vacuum pump buffer tank; 20. a vacuum pump; 21. a second condensate pump; 22. a condensate tank; 23. a first condensate pump; 24. a second thickener; 25. a second centrifuge; 26. a second mother liquor tank; 27. a second mother liquor pump; 28. a first thickener; 29. a first centrifuge group; 30. a first mother liquor tank; 31. a first mother liquor pump; 32. and (5) salt legs.
Detailed Description
As shown in fig. 1, the utility model provides a two waste water evaporative crystallization devices, including first raw material storage tank, second raw material storage tank, the pre-heater device, exhaust steam pre-heater 16, first raw materials collection device, second raw materials collection device, demister 17, evaporative condensing unit and the one-effect evaporator who connects gradually, two-effect evaporator, three-effect evaporator, first raw material storage tank, the pre-heater device, one-effect evaporator, first raw materials collection device connects gradually, second raw materials storage tank, exhaust steam pre-heater 16, two-effect evaporator, three-effect evaporator, second raw materials collection device connects gradually, three-effect evaporator's play steam port in proper order with the steam inlet of exhaust steam pre-heater 16, demister 17, evaporative condensing unit connects, the liquid outlet of two-effect evaporator further is connected through evaporative condensing unit and pre-heater device's inlet.
In the embodiment, the treatment of double waste water can be realized simultaneously, the equipment investment cost is reduced, the public engineering consumption is reduced, only single waste water can be treated according to the requirement, the operation flexibility is high, and the adaptability is strong. By adopting the preheater device and the exhaust steam preheater 16, the preheating of the materials is realized, the steam quantity consumed by the materials due to temperature rise is reduced, and the temperature of the condensed water out of the system is reduced. Through increasing demister 17 for get rid of the liquid foam that smugglies secretly in the secondary steam, to prevent that secondary steam from leading to the fact follow-up comdenstion water belting because of the liquid foam that smugglies secretly, thereby influence the working property and the treatment effect of follow-up equipment.
Further, first raw materials collection device is including the first stiff ware 28, first centrifuge group 29, the first mother liquor jar 30 that connect gradually, and the discharge gate of one effect evaporimeter is connected with first stiff ware 28 through one effect discharge pump 8, and first mother liquor jar 30 is further connected with the feed inlet of one effect evaporimeter through first mother liquor pump 31.
Further, the second raw material collecting device comprises a second thickener 24, a second centrifuge 25 and a second mother liquor tank 26 which are sequentially connected, a discharge port of the triple-effect evaporator is connected with the second thickener 24 through a triple-effect discharge pump 15, and the second mother liquor tank 26 is further connected with a feed port of the triple-effect evaporator through a second mother liquor pump 27.
Further, the preheater device includes secondary steam comdenstion water preheater 3, raw steam comdenstion water preheater 4, and raw steam comdenstion water preheater 4's discharge gate is connected with the feed inlet of a single effect evaporator, and raw steam comdenstion water preheater 4's inlet is connected with a single effect evaporator's liquid outlet, and secondary steam comdenstion water preheater 3's feed inlet and first raw materials storage tank are connected, and secondary steam comdenstion water preheater 3's discharge gate and raw steam comdenstion water preheater 4's feed inlet are connected.
Further, the evaporation condensing equipment includes evaporative condenser 18, condensate water tank 22, vacuum pump buffer tank 19, vacuum pump 20, be equipped with mutually independent first cavity in the condensate water tank 22, the second cavity, evaporative condenser 18's steam inlet is connected with demister 17, evaporative condenser 18's liquid outlet is connected with the inlet of first cavity, the liquid outlet of first cavity is connected with secondary steam condensate water pre-heater 3's inlet through first condensate water pump 23, the liquid outlet of triple effect evaporimeter is connected with the inlet of second cavity, the liquid outlet of second cavity is connected with second condensate water pump 21, condensate water tank 22's extraction opening and vacuum pump buffer tank 19, vacuum pump 20 connects gradually.
In the structure, the vacuum pump buffer tank 19 is arranged, so that the pressure can be buffered, the backflow is prevented, and the vacuum pump buffer tank can be used for vapor-liquid separation to achieve the purpose of stabilizing the vacuum degree. The condensate water tank 22 can realize the respective recovery and utilization of condensate water by adopting a double-chamber structure, one part of the condensate water provides a heat source for the secondary steam condensate water preheater 3, and one part of the condensate water is discharged to the next process, so that the investment is saved, and the occupied area is reduced.
Further, the single-effect evaporator comprises a single-effect heating chamber 5, a single-effect separation chamber 6 and a single-effect axial-flow pump 7 which are sequentially connected to form a circulation. The double-effect evaporator comprises a double-effect heating chamber 9, a double-effect separation chamber 10 and a double-effect axial-flow pump 11 which are sequentially connected to form a circulation. The triple-effect evaporator comprises a triple-effect heating chamber 12, a triple-effect separation chamber 13 and a triple-effect axial-flow pump 14 which are sequentially connected to form a circulation.
Further, the bottom of the three-effect separation chamber 13 is connected with a salt leg 32, the bottom of the salt leg 32 is provided with a back washing port, and the back washing port is connected with a back washing pipeline. In the structure, when the equipment is in operation or shut down, a back washing pump pumps diluted stock solution or gas into the salt leg 32 through a back washing port, fine crystals in the salt leg 32 float again and enter a crystal growth region, and qualified large particles cannot be washed and fall on the bottom of the salt leg 32, so that the crystallization quality and the particle size of a product are ensured to be uniform, and fine crystals are not mixed. The product is also washed once to wash the crystals adhered to the inner wall of the salt leg 32 to reduce internal clogging.
In this embodiment, the first raw material storage tank is sodium chloride wastewater, the first thickener 28 is a sodium thickener, and the first mother liquor tank 30 is a sodium mother liquor tank. The second raw material storage tank is filled with ammonium chloride and ammonium sulfate wastewater, and the second thickener 24 is an ammonium thickener. The second mother liquor pipe is an ammonium mother liquor tank.
The utility model discloses two waste water evaporation crystallization device's concrete theory of operation as follows:
first, material flow direction
Sodium chloride wastewater: sodium chloride wastewater from pretreatment is sequentially pumped into a secondary steam condensate water preheater 3 and a raw steam condensate water preheater 4 through a first feeding pump 1, is preheated to a certain temperature and then enters a first-effect evaporator for evaporation concentration, is evaporated to a certain concentration and then is pumped into a first thickener 28 through a first-effect discharging pump 8, then enters a first centrifuge set 29 for centrifugal separation, a crystal product (namely sodium chloride) obtained by separation is collected, mother liquor obtained by separation enters a first mother liquor tank 30, wherein a part of the mother liquor is further pumped into a first-effect separation chamber 6 through a first mother liquor pump 31 for evaporation concentration again, and the other part of the mother liquor is directly concentrated in a single kettle for reprocessing.
Ammonium chloride and ammonium sulfate wastewater: ammonium chloride and ammonium sulfate waste water from pretreatment is sequentially pumped into a dead steam preheater 16 through a second feeding pump 2, is sequentially preheated to a certain temperature and then sequentially enters a second-effect evaporator and a third-effect evaporator for evaporation concentration, is evaporated to a certain concentration and then is pumped into a second thickener 24 through a third-effect discharging pump 15 for thickening, then enters a second centrifuge 25 for centrifugal separation, a crystallized product (namely ammonium chloride ammonium sulfate) obtained by separation is collected, mother liquor obtained by separation enters a second mother liquor tank 26, wherein one part of the mother liquor is further pumped into a third-effect separation chamber 13 through a second mother liquor pump 27 for evaporation concentration again, and the other part of the mother liquor is reprocessed. The mode of reprocessing is selected according to the need, such as direct discharge, single-kettle concentration and the like
Second, steam flow direction
Raw steam from a steam main pipe enters a shell pass of the first-effect heating chamber 5 to be used as a heat source of the first-effect heating chamber, secondary steam generated by the first-effect separation chamber 6 enters a shell pass of the second-effect heating chamber 9 to be used as a heating source, part of secondary steam generated by the second-effect separation chamber 10 enters a shell pass of the third-effect heating chamber 12 to be used as a heating source, and the rest secondary steam enters the third-effect separation chamber 13 to enter an exhaust steam preheater 16 together with the secondary steam evaporated from the third-effect separation chamber 13 to preheat materials, and then enters an evaporation condenser 18 to be condensed after being defoamed by a demister 17.
Third, the flow direction of condensed water
Raw steam condensate water generated by the shell pass of the primary heating chamber 5 enters the raw steam condensate water preheater 4 to preheat materials (sodium chloride wastewater), and the preheated raw steam condensate water returns to the boiler room. Condensed water generated by the shell pass of the two-effect heating chamber 9 enters a first cavity of a condensed water tank 22, and is pumped into a secondary steam condensed water preheater 3 by a first condensed water pump 23 to preheat materials (sodium chloride wastewater), and the materials are preheated before the next procedure. The condensed water generated by the shell pass of the triple-effect heating chamber 12 and the condensed water generated by the dead steam preheater 16, the demister 17 and the evaporative condenser 18 in turn enter the second cavity of the condensed water tank 22, and then are pumped into the next procedure by the second condensed water pump 21 for processing.
The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.
Claims (7)
1. A double-waste water evaporative crystallization device is characterized in that: including first raw materials storage tank, second raw materials storage tank, pre-heater device, exhaust steam pre-heater, first raw materials collection device, second raw materials collection device, demister, evaporation condensing equipment and the one-effect evaporator, two-effect evaporator, the triple-effect evaporator that connect gradually, first raw materials storage tank, pre-heater device, one-effect evaporator, first raw materials collection device connect gradually, second raw materials storage tank, exhaust steam pre-heater, two-effect evaporator, triple-effect evaporator, second raw materials collection device connect gradually, the play steam port of triple-effect evaporator in proper order with the steam inlet of exhaust steam pre-heater, demister, evaporation condensing equipment are connected, the liquid outlet of two-effect evaporator further is connected through the inlet of evaporation condensing equipment and pre-heater device.
2. The double wastewater evaporative crystallization apparatus of claim 1, wherein: first raw materials collection device is including the first stiff ware, first centrifuge group, the first mother liquor jar that connect gradually, the discharge gate of a effect evaporimeter is connected with first stiff ware through an effect discharge pump, first mother liquor jar further through a mother liquor pump with the feed inlet of a effect evaporimeter is connected.
3. The double wastewater evaporative crystallization apparatus of claim 1, wherein: the second raw material collecting device comprises a second thickener, a second centrifugal machine and a second mother liquor tank which are sequentially connected, a discharge port of the triple-effect evaporator is connected with the second thickener through a triple-effect discharge pump, and the second mother liquor tank is further connected with a feed port of the triple-effect evaporator through a second mother liquor pump.
4. The double wastewater evaporative crystallization apparatus of claim 1, wherein: the pre-heater device comprises a secondary steam condensate water pre-heater and a raw steam condensate water pre-heater, wherein a discharge port of the raw steam condensate water pre-heater is connected with a feed inlet of a first-effect evaporator, a feed inlet of the raw steam condensate water pre-heater is connected with a liquid outlet of the first-effect evaporator, a feed inlet of the secondary steam condensate water pre-heater is connected with a first raw material storage tank, and a discharge port of the secondary steam condensate water pre-heater is connected with a feed inlet of the raw steam condensate water pre-heater.
5. The double wastewater evaporative crystallization apparatus of claim 4, wherein: the evaporative condensing unit comprises an evaporative condenser, a condensate water tank, a vacuum pump buffer tank and a vacuum pump, wherein a first cavity and a second cavity which are mutually independent are arranged in the condensate water tank, a steam inlet of the evaporative condenser is connected with a demister, a liquid outlet of the evaporative condenser is connected with a liquid inlet of the first cavity, a liquid outlet of the first cavity is connected with a liquid inlet of a secondary steam condensate water preheater through a first condensate water pump, a liquid outlet of a triple effect evaporator is connected with a liquid inlet of the second cavity, a liquid outlet of the second cavity is connected with a second condensate water pump, and an air suction opening of the condensate water tank is sequentially connected with the vacuum pump buffer tank and the vacuum pump.
6. The double wastewater evaporative crystallization apparatus of claim 1, wherein: the first-effect evaporator comprises a first-effect heating chamber, a first-effect separation chamber and a first-effect axial-flow pump which are sequentially connected to form a cycle, and the second-effect evaporator comprises a second-effect heating chamber, a second-effect separation chamber and a second-effect axial-flow pump which are sequentially connected to form a cycle; the triple-effect evaporator comprises a triple-effect heating chamber, a triple-effect separation chamber and a triple-effect axial-flow pump which are sequentially connected to form a circulation.
7. The double wastewater evaporative crystallization apparatus of claim 6, wherein: the bottom of the triple-effect separation chamber is connected with a salt leg, the bottom of the salt leg is provided with a back washing port, and the back washing port is connected with a back washing pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020470384.4U CN212050612U (en) | 2020-04-02 | 2020-04-02 | Double-waste water evaporation crystallization device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020470384.4U CN212050612U (en) | 2020-04-02 | 2020-04-02 | Double-waste water evaporation crystallization device |
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| CN212050612U true CN212050612U (en) | 2020-12-01 |
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| CN202020470384.4U Active CN212050612U (en) | 2020-04-02 | 2020-04-02 | Double-waste water evaporation crystallization device |
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