CN205099396U - High concentration contains energy -conserving evaporation crystallization process system in salt waste water quadruple effect vacuum - Google Patents
High concentration contains energy -conserving evaporation crystallization process system in salt waste water quadruple effect vacuum Download PDFInfo
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Abstract
High concentration contains energy -conserving evaporation crystallization process system in salt waste water quadruple effect vacuum, including raw materials storage tank, charge pump, plate heat exchanger, an effect heater, an effect evaporated crystallizer, two effect heaters, two effect evaporated crystallizer, triple effect heater, triple effect evaporated crystallizer, quadruple effect heater, quadruple effect evaporated crystallizer, surface cooler, slurry bucket, centrifugal separator, crystal collection tank, mother solution storage tank, mother liquor pump, its characterized in that: charge pump, plate heat exchanger, an effect heater, an effect evaporated crystallizer, two effect heaters, two effect evaporated crystallizer, triple effect heater, triple effect evaporated crystallizer, quadruple effect heater, quadruple effect evaporated crystallizer, surface cooler, slurry bucket, centrifugal separator, crystal collection tank, mother solution storage tank, mother liquor pump are connected in proper order to the raw materials storage tank. The utility model discloses the comprehensive energy consumption is low, and evaporation crystallized product industry salt quality reaches the purified salt secondary standard requirement that (GBT5462 -2003) national industry salt standard required.
Description
Technical field
The utility model relates to a kind of evaporation and crystallization system, especially relates to high-concentration salt-containing wastewater quadruple effect vacuum energy-saving evaporative crystallization treatment system.
Background technology
At present, crystallisation by cooling discontinuous crystallization processes account for more than 95% in every profession and trade at home, and labour productivity is low, mainly manual operation, quality product can not be guaranteed, and comprehensive energy consumption is high, and corrodibility is large, plugging, the phenomenon that scabs are given prominence to, need often cleaning, labour intensity large user do not welcome, more importantly product granularity thin (have as flour), dehydration difficulty, caking has had a strong impact on the quality of product.
Summary of the invention
The utility model is for the problems referred to above, high-concentration salt-containing wastewater quadruple effect vacuum energy-saving evaporative crystallization treatment system is provided, NaCl waste water is delivered to heater heats through recycle pump, mistake hot solution after heating enters evaporative crystallizer evaporation, water vapor is discharged by evaporative crystallizer top, concentrated solution reaches supersaturation, comes downwards to bottom evaporative crystallizer through central canal, then upwards flows and crystallize out.The crystal grain of separating out floats and flows in liquid stream upwards, and with liquid upwards, macrobead is downward, and like this, in evaporative crystallizer, crystal grain is increasing from top to bottom for little crystal grain, forms classification.Minimum at the top particle of evaporative crystallizer, flow out through recycle pump from circulation tube and enter well heater, heating afterwards little crystal grain is dissolved again, turns back to evaporative crystallizer again evaporate as mistake hot solution; The bottom die of evaporative crystallizer is maximum, exports out carry out solid-liquid separation from bottom magma.After separation, solid is as product, and liquid according to the number of solute in mother liquor, can return evaporative crystallizer by recycle pump again.Adopt this quadruple effect vacuum evaporating crystalization system, comprehensive energy consumption is low, and the heat making full use of system condensing water is to reduce the energy consumption of system, and with evaporated water 19T/h (saltiness 8.464%) for calculating, namely 1 ton of steam can evaporate 4.578 tons of brine wastes; Evaporative crystallization product Industrial Salt quality reaches the purified salt secondary standard requirement of (GBT5462-2003) National Industrial salt standard-required; Operating temperature is low, reduces the energy consumption needed for cooling; Not plugging, non-scaling, grain size number is large, smooth appearance.
The technical solution of the utility model is: high-concentration salt-containing wastewater quadruple effect vacuum energy-saving evaporative crystallization treatment system, comprise raw material storage tank, fresh feed pump, plate-type heat exchanger, one effect well heater, one effect evaporative crystallizer, two effect well heaters, two effect evaporative crystallizers, triple effect well heater, triple effect evaporation crystallizer, quadruple effect well heater, four-effect evaporation crystallizer, surface cooler, slurries bucket, whizzer, crystal holding tank, mother liquor holding tank, mother liquor pump, it is characterized in that: described raw material storage tank is linked in sequence fresh feed pump, plate-type heat exchanger, one effect well heater, one effect evaporative crystallizer, two effect well heaters, two effect evaporative crystallizers, triple effect well heater, triple effect evaporation crystallizer, quadruple effect well heater, four-effect evaporation crystallizer, surface cooler, slurries bucket, whizzer, crystal holding tank, mother liquor holding tank, mother liquor pump, described fresh feed pump outlet is by pipe connecting formula interchanger material inlet, plate-type heat exchanger material outlet is imitated the import of well heater top material by pipeline and and is connected, one effect well heater bottom material outlet is imitated evaporative crystallizer by pipeline and and is connected, imitate recycle pump by pipeline and bottom one effect evaporative crystallizer to be connected, simultaneously, one effect heater base is imitated recycle pump by pipeline and and is connected, one effect circulating-pump outlet is imitated the import of well heater top material by pipeline and and is connected, simultaneously, one effect circulating-pump outlet is imitated the import of well heater top material by pipeline and two and is connected, two effect well heater bottom material outlets are imitated evaporative crystallizer by pipeline and two and are connected, imitate recycle pump by pipeline and two bottom two effect evaporative crystallizers to be connected, simultaneously, two effect heater base are imitated recycle pump by pipeline and two and are connected, two effect circulating-pump outlets are imitated the import of well heater top material by pipeline and two and are connected, simultaneously, two effect circulating-pump outlets are connected with triple effect cycle pump material inlet by pipeline, triple effect evaporation crystalliser feet material outlet is connected with triple effect cycle pump material inlet by pipeline, triple effect cycle pump material outlet is connected with triple effect heater base by pipeline, the outlet of triple effect well heater top material is connected with triple effect evaporation crystallizer top by pipeline, triple effect cycle pump discharge is connected with quadruple effect recycle pump material inlet by pipeline, four-effect evaporation crystallizer bottom material outlet is connected with quadruple effect recycle pump material inlet by pipeline, quadruple effect recycle pump material outlet is connected with quadruple effect heater base by pipeline, the outlet of quadruple effect well heater top material is connected with four-effect evaporation crystallizer top by pipeline, four-effect evaporation crystalliser feet material outlet is connected with discharging pump material inlet by pipeline, discharging pump material outlet is connected with slurries bucket top by pipeline, slurries bottom of the barrel is connected with whizzer by pipeline, whizzer by pipeline respectively with crystal holding tank, mother liquor holding tank connects, mother liquor holding tank is connected with mother liquor pump by pipeline, mother liquor pump discharge is connected with four-effect evaporation crystallizer top by pipeline, one effect well heater top is provided with saturation steam entrance, two effect well heater tops are provided with steam entry, triple effect well heater top is provided with steam entry, quadruple effect well heater top is provided with steam entry, surface cooler top is provided with steam entry, one effect evaporative crystallizer top is provided with steam outlet, two effect evaporative crystallizer tops are provided with steam outlet, triple effect evaporation crystallizer top is provided with steam outlet, four-effect evaporation crystallizer top is provided with steam outlet, saturation steam entrance is connected with steam-jet compression pump by pipeline, steam-jet compression pump is connected with steam storage tank by pipeline, steam entry is all connected with corresponding steam outlet respectively by pipeline, one effect well heater bottom is provided with an effect well heater saturation steam condensate outlet, one effect well heater saturation steam condensate outlet is connected with plate-type heat exchanger saturation steam condensate inlet by pipeline, plate-type heat exchanger saturation steam condensate outlet is connected with saturation steam condensed fluid collection tank by pipeline, saturation steam condensed fluid collection tank is connected with saturation steam condensate pump by pipeline, saturation steam condensate pump connects triple effect evaporation crystallizer wire mesh demister rinse mouth respectively by pipeline, four-effect evaporation crystallizer wire mesh demister rinse mouth, two effect well heater bottoms are provided with two effect heater vaporizes condensation-water drains, two effect heater vaporizes condensation-water drains are connected with triple effect heater vaporizes condensing water inlet by pipeline, triple effect heater vaporizes condensation-water drain is connected with quadruple effect heater vaporizes condensing water inlet by pipeline, quadruple effect heater vaporizes condensation-water drain is connected with surface cooler evaporative condenser water inlet by pipeline, surface cooler evaporative condenser water out is connected with evaporative condenser water collecting tank by pipeline, evaporative condenser water collecting tank is connected with evaporative condenser water pump by pipeline, evaporative condenser water pump is connected with evaporative condenser water out by pipeline, surface cooler top is provided with surface cooler entrance of cooling water, surface cooler cooling water outlet is provided with bottom surface cooler, surface cooler entrance of cooling water is connected with cooling water tank by pipeline, surface cooler cooling water outlet is connected with water coolant holding tank by pipeline, cooling water tank is connected with slurries bucket entrance of cooling water by pipeline, slurries bucket cooling water outlet is connected with water coolant holding tank by pipeline.
The beneficial effects of the utility model are:
1, comprehensive energy consumption is low:
Adopt quadruple effect vacuum evaporating crystalization system, make full use of the heat of system condensing water to reduce the energy consumption of system, with concentrating salt-containing waste water 19T/h (saltiness 8.464%) for calculating, namely need 4.15T/h steam, 1 ton of steam raising brine waste 4.578 tons.
(concentrating salt-containing waste water 19T/h needs 8.15T/h steam with triple effect evaporation crystal system, 1 ton of steam raising brine waste 2.33 tons) compare, steam saving 4T per hour, by steam per ton 200 yuan, can save 200 × 4=800 unit/h, the whole year can save 5,760,000 yuan.Only steam consumption can save 5,760,000 yuan a whole year.
(concentrating salt-containing waste water 19T/h needs 6.15T/h steam to the four-effect evaporation crystal system common with routine, 1 ton of steam raising brine waste 3.1 tons) compare, steam saving 2T per hour, by steam per ton 200 yuan, can save 200 × 2=400 unit/h, the whole year can save 2,880,000 yuan.Only steam consumption can save 2,880,000 yuan a whole year.
2, the quality of Industrial Salt is high:
Evaporative crystallization product Industrial Salt quality reaches the purified salt secondary standard requirement of (GBT5462-2003) National Industrial salt standard-required.
3, operating temperature is low:
Quadruple effect vacuum evaporating crystalization system operating temperature is low, often imitates service temperature and is respectively: an effect: 95 DEG C, two effects: 81 DEG C, triple effect: 69 DEG C, quadruple effect 53 DEG C.Lower than triple effect evaporation crystal system service temperature about 30 DEG C (in triple effect evaporation work efficiency temperature 130 DEG C), on average often imitates low 10 ~ 13 DEG C than the service temperature of conventional four-effect evaporation crystallizer.And the condensate temperature that the four-effect evaporation crystallizer of routine finally generates is at about 60 ~ 65 DEG C, generally also need to carry out cooling just can be back to production, add energy consumption, the final water of condensation of native system is 42 DEG C, reduces the energy consumption needed for cooling.The low main benefit of system operating temperature is:
(1), evaporation and crystallization system operating temperature is low, little to the corrodibility of equipment, wearing and tearing are few, extend the work-ing life of equipment to greatest extent; (2), the evaporation and crystallization system operation condensate temperature low security for whole operation is good, all produces under negative pressure state, even if equipment occurs that trachoma seepage also there will not be the phenomenon of intravenous extravasation, ensure that the safety of operator.And in the low workshop of use temperature, can not see the steam disorderly flown everywhere, be perfect protection to buildings, instrument, low-voltage electrical.Operating temperature is low simultaneously, and after carrying out insulation, thermosteresis is little, and the utilization ratio of heat energy achieves maximization, decreases the energy waste of system, achieves the energy and makes full use of to greatest extent.
4, not plugging, non-scaling:
Plugging is because single tube superheating temperature raises in vacuum evaporating crystalization system, to come to life evaporation at heating tube upper orifice, the nucleus of salinity starts crystallization, the salinity that crystallization generates is adsorbed on the mouth of pipe of upcast, sometimes hundreds of heating tubes can block up 1/3 even 1/2, decrease heat interchanging area and have had a strong impact on the steam output of brine waste.By reducing single tube superheating temperature, optimizing the length-to-diameter ratio of heating tube, optimizing the parameters such as the above waste water liquid level of tube sheet, solving plugging problem;
Fouling is that form very thick salt crust, its knot is meeting self falling after certain thickness, the recycle pump of vaporizer, thermometer, pressure unit etc. is smashed, can cause stopping production time serious because saturated solution boiling is splashed on evaporation tank skin.By increasing the measure of polishing tank skin, above tank skin, adding the measure of coil pipe spray tank skin, this phenomenon of fouling is eliminated.
5, grain size number is large, smooth appearance:
By discharging certain mother liquor in four-effect evaporation crystallizer, finally guarantee that the Industrial Salt that crystallization produces reaches (GBT5462-2003) National Industrial salt secondary (refining industrial salt) standard, the evaporative crystallizer simultaneously selected, increase the volume of educating brilliant room, make grain size number can at more than 0.8mm, and uniform particles any surface finish.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In Fig. 1, 1. an effect well heater, 2. two effect well heaters, 3. triple effect well heater, 4. quadruple effect well heater, 5. an effect evaporative crystallizer, 6. two effect evaporative crystallizers, 7. triple effect evaporation crystallizer, 8. four-effect evaporation crystallizer, 9. surface cooler, 10. saturation steam condensed fluid collection tank, 11. evaporative condenser water collecting tanks, 12. surface cooler entrance of cooling water, 13. whizzers, 14. mother liquor holding tanks, 15. slurries buckets, 16. plate-type heat exchangers, 17. steam-jet compression pumps, 18. surface cooler cooling water outlets, 19. fresh feed pumps, 20. saturation steam condensate pumps, 21. 1 effect recycle pumps, 22. 2 effect recycle pumps, 23. triple effect cycle pumps, 24. quadruple effect recycle pumps, 25. discharging pumps, 26. evaporative condenser water pumps, 27. mother liquor pumps, 28. raw material storage tanks, 29. steam storage tanks, 30. cooling water tanks, 31. saturation steam entrances, 32. steam entries, 33. steam entries, 34. steam entries, 35. steam outlets, 36. steam outlets, 37. steam outlets, 38. steam outlets, 39. steam entries, 40. 1 effect well heater saturation steam condensate outlets, 41. plate-type heat exchanger saturation steam condensate inlet, 42. plate-type heat exchanger saturation steam condensate outlets, 43. triple effect evaporation crystallizer wire mesh demister rinse mouths, 44. four-effect evaporation crystallizer wire mesh demister rinse mouths, 45. 2 effect heater vaporizes condensation-water drains, 46. triple effect heater vaporizes condensing water inlets, 47. triple effect heater vaporizes condensation-water drains, 48. quadruple effect heater vaporizes condensing water inlets, 49. quadruple effect heater vaporizes condensation-water drains, 50. surface cooler evaporative condenser water inlets, 51. surface cooler evaporative condenser water outs, 52. evaporative condenser water outs, 53. slurries bucket entrance of cooling water, 54. slurries bucket cooling water outlets, 55. water coolant holding tanks, 56. crystal holding tanks.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, the utility model is high-concentration salt-containing wastewater quadruple effect vacuum energy-saving evaporative crystallization treatment system, comprise raw material storage tank 28, fresh feed pump 19, plate-type heat exchanger 16, one effect well heater 1, one effect evaporative crystallizer 5, two effect well heaters 2, two effect evaporative crystallizers 6, triple effect well heater 3, triple effect evaporation crystallizer 7, quadruple effect well heater 4, four-effect evaporation crystallizer 8, surface cooler 9, slurries bucket 15, whizzer 13, crystal holding tank 56, mother liquor holding tank 14, mother liquor pump 27, it is characterized in that: described raw material storage tank 28 is linked in sequence fresh feed pump 19, plate-type heat exchanger 16, one effect well heater 1, one effect evaporative crystallizer 5, two effect well heaters 2, two effect evaporative crystallizers 6, triple effect well heater 3, triple effect evaporation crystallizer 7, quadruple effect well heater 4, four-effect evaporation crystallizer 8, surface cooler 9, slurries bucket 15, whizzer 13, crystal holding tank 56, mother liquor holding tank 14, mother liquor pump 27, described fresh feed pump 19 exports by pipe connecting formula interchanger 16 material inlet, plate-type heat exchanger 16 material outlet is imitated the import of well heater 1 top material by pipeline and and is connected, one effect well heater 1 bottom material outlet is imitated evaporative crystallizer 5 by pipeline and and is connected, imitate recycle pump 21 by pipeline and bottom one effect evaporative crystallizer 5 to be connected, simultaneously, imitate recycle pump 21 by pipeline and bottom one effect well heater 1 to be connected, one effect recycle pump 21 exports imitates the import of well heater 1 top material by pipeline and and is connected, simultaneously, one effect recycle pump 21 exports imitates the import of well heater 2 top material by pipeline and two and is connected, two effect well heater 2 bottom material outlets are imitated evaporative crystallizer 6 by pipeline and two and are connected, imitate recycle pump 22 by pipeline and two bottom two effect evaporative crystallizers 6 to be connected, simultaneously, imitate recycle pump 22 by pipeline and two bottom two effect well heaters 2 to be connected, two effect recycle pumps 22 export imitates the import of well heater 2 top material by pipeline and two and is connected, simultaneously, two effect recycle pumps 22 are exported and are connected with triple effect cycle pump 23 material inlet by pipeline, the outlet of triple effect evaporation crystallizer 7 bottoms material is connected with triple effect cycle pump 23 material inlet by pipeline, triple effect cycle pump 23 material outlet is connected with bottom triple effect well heater 3 by pipeline, the outlet of triple effect well heater 3 top material is connected with triple effect evaporation crystallizer 7 top by pipeline, triple effect cycle pump 23 is exported and is connected with quadruple effect recycle pump 24 material inlet by pipeline, four-effect evaporation crystallizer 8 bottom material outlet is connected with quadruple effect recycle pump 24 material inlet by pipeline, quadruple effect recycle pump 24 material outlet is connected with bottom quadruple effect well heater 4 by pipeline, the outlet of quadruple effect well heater 4 top material is connected with four-effect evaporation crystallizer 8 top by pipeline, the outlet of four-effect evaporation crystallizer 8 bottoms material is connected with discharging pump 25 material inlet by pipeline, discharging pump 25 material outlet is connected with slurries bucket 15 top by pipeline, be connected with whizzer 13 by pipeline bottom slurries bucket 15, whizzer 13 by pipeline respectively with crystal holding tank 56, mother liquor holding tank 14 connects, mother liquor holding tank 14 is connected with mother liquor pump 27 by pipeline, mother liquor pump 27 is exported and is connected with four-effect evaporation crystallizer 8 top by pipeline, one effect well heater 1 top is provided with saturation steam entrance 31, two effect well heater 2 tops are provided with steam entry 32, triple effect well heater 3 top is provided with steam entry 33, quadruple effect well heater 4 top is provided with steam entry 34, surface cooler 9 top is provided with steam entry 39, one effect evaporative crystallizer 5 top is provided with steam outlet 35, two effect evaporative crystallizer 6 tops are provided with steam outlet 36, triple effect evaporation crystallizer 7 top is provided with steam outlet 37, four-effect evaporation crystallizer 8 top is provided with steam outlet 38, saturation steam entrance 31 is connected with steam-jet compression pump 17 by pipeline, steam-jet compression pump 17 is connected with steam storage tank 29 by pipeline, steam entry 32 is connected with steam outlet 35 by pipeline, steam entry 33 is connected with steam outlet 36 by pipeline, steam entry 34 is connected with steam outlet 37 by pipeline, steam entry 39 is connected with steam outlet 38 by pipeline, one effect well heater 1 bottom is provided with an effect well heater saturation steam condensate outlet 40, one effect well heater saturation steam condensate outlet 40 is connected with plate-type heat exchanger saturation steam condensate inlet 41 by pipeline, plate-type heat exchanger saturation steam condensate outlet 42 is connected with saturation steam condensed fluid collection tank 10 by pipeline, saturation steam condensed fluid collection tank 10 is connected with saturation steam condensate pump 20 by pipeline, saturation steam condensate pump 20 connects triple effect evaporation crystallizer wire mesh demister rinse mouth 43 respectively by pipeline, four-effect evaporation crystallizer wire mesh demister rinse mouth 44, two effect well heater 2 bottoms are provided with two effect heater vaporizes condensation-water drains 45, two effect heater vaporizes condensation-water drains 45 are connected with triple effect heater vaporizes condensing water inlet 46 by pipeline, triple effect heater vaporizes condensation-water drain 47 is connected with quadruple effect heater vaporizes condensing water inlet 48 by pipeline, quadruple effect heater vaporizes condensation-water drain 49 is connected with surface cooler evaporative condenser water inlet 50 by pipeline, surface cooler evaporative condenser water out 51 is connected with evaporative condenser water collecting tank 11 by pipeline, evaporative condenser water collecting tank 11 is connected with evaporative condenser water pump 26 by pipeline, evaporative condenser water pump 26 is connected with evaporative condenser water out 52 by pipeline, surface cooler 9 top is provided with surface cooler entrance of cooling water 12, surface cooler cooling water outlet 18 is provided with bottom surface cooler 9, surface cooler entrance of cooling water 12 is connected with cooling water tank 30 by pipeline, surface cooler cooling water outlet 18 is connected with water coolant holding tank 55 by pipeline, cooling water tank 30 is connected with slurries bucket entrance of cooling water 53 by pipeline, slurries bucket cooling water outlet 54 is connected with water coolant holding tank 55 by pipeline.
Working process of the present utility model is: generate after the polycrystalline silicon device chlorine-containing silane waste gas in raw material storage tank 28 and chlorosilane raffinate carrying out washing treatment containing NaCl waste water (flow 19T/h, sodium chloride solution mass concentration 8.464%, original liquid temperature 25 DEG C), plate-type heat exchanger 16 is entered under fresh feed pump 19 acts on, carry out thermal pretreatment, after preheating, the temperature of NaCl waste water is 50 DEG C, pressure 0.28MPa, then an effect well heater 1 is entered, from the 1.3MPa of steam storage tank 29, the saturation steam of 192 DEG C produces 153 DEG C after steam-jet compression pump 17 compresses, the saturation steam of pressure 0.4MPa, enter an effect well heater 1, NaCl waste water is heated, after heating, NaCl waste water became hot solution (temperature 98 DEG C, pressure 0.07MPa), then effect evaporative crystallizer 5 evaporative crystallization is entered, concentrated solution reaches supersaturation, come downwards to bottom crystal grain graded region through central canal, then upwards flow and crystallize out.The crystal grain of separating out floats and flows in liquid stream upwards, and with liquid upwards, macrobead is downward, and like this, in crystal grain graded region, crystal grain is increasing from top to bottom for little crystal grain, forms classification.By regulating the rate of discharge of an effect recycle pump 21 modified hot solution can flow back to the flow of an effect evaporative crystallizer 5, thus change the speed that liquid upwards flows bottom pipe core, and then change the upper and lower crystal grain size of crystal grain graded region.Such as, the overheated solution flow flowing back to an effect evaporative crystallizer 5 is larger, and crystal grain graded region flow stream velocity is upwards faster, and the particle taken away by the liquid stream upwards flowed is larger, and bottom particles is larger, and the crystal product particle obtained is larger.Otherwise less, use this means, the size of crystalline product particle can be regulated.By that analogy, it is 90 DEG C from the temperature of an effect evaporative crystallizer 5 NaCl waste water out, pressure 0.29MPa, two effect well heaters 2 are entered through an effect recycle pump 21, (temperature is 92 DEG C to the water vapor of simultaneously discharging from effect evaporative crystallizer 5 top, pressure 0.03MPa), enter two effect well heaters 2, NaCl waste water is heated, after heating, the temperature of NaCl waste water is 91 DEG C, pressure 0.07MPa, then two effect evaporative crystallizer 6 evaporative crystallizations are entered, it is 85 DEG C from the temperature of two effect evaporative crystallizers 6 NaCl waste water out, pressure 0.08MPa, triple effect well heater 3 is entered through two effect recycle pumps 22, from two effect evaporative crystallizers 6 water vapor out, (temperature is 85 DEG C simultaneously, pressure 0.05MPa), enter triple effect well heater 3, NaCl waste water is heated, after heating, the temperature of NaCl waste water is 84 DEG C, pressure 0.28MPa, then triple effect evaporation crystallizer 7 evaporative crystallization is entered, it is 71 DEG C from the temperature of triple effect evaporation crystallizer 7 NaCl waste water out, pressure 0.29MPa, quadruple effect well heater 4 is entered through triple effect cycle pump 23, simultaneously from triple effect evaporation crystallizer 7 water vapor out, (temperature is 72 DEG C, pressure 0.065MPa), enter quadruple effect well heater 4, NaCl waste water is heated, after heating, the temperature of NaCl waste water is 71 DEG C, pressure 0.28MPa, then four-effect evaporation crystallizer 8 evaporative crystallization is entered, it is 63 DEG C from the temperature of four-effect evaporation crystallizer 8 NaCl waste water out, pressure 0.08MPa, oar liquid bucket 15 is entered through discharging pump 25, after cooling, the temperature of NaCl waste water is 50 DEG C, pressure 0.08MPa, then enter whizzer 13 and carry out solid-liquid separation, after separation, the NaCl (1500Kg/h) of crystallization flows out from whizzer 13 discharge port, enter crystal holding tank 56, Industrial Salt (NaCl) quality of evaporative crystallization reaches the purified salt secondary standard requirement of (GBT5462-2003) National Industrial salt standard-required, i.e. NaCl >=97.5%, granularity >=0.8mm, uniform particles, any surface finish, mother liquor flows into mother liquor holding tank 14 from whizzer serum outlet, and mother liquor is sent into four-effect evaporation crystallizer 8 through mother liquor pump 27 and carried out evaporative crystallization,
Simultaneously from four-effect evaporation crystallizer 8 water vapor out, (temperature is 63 DEG C, pressure 0.075MPa), enter surface cooler 9, after cooling, (temperature is 50 DEG C, pressure 0.04MPa), enter evaporative condenser water collecting tank 11, send into evaporative condenser water out 52 through evaporative condenser water pump 26;
Enter surface cooler 9 from the water coolant (temperature is 32 DEG C, pressure 0.38MPa) of cooling water tank 30, after heat exchange (temperature is 42 DEG C, pressure 0.2MPa), then enter water coolant holding tank 55;
Enter oar liquid bucket 15 from the water coolant (temperature is 32 DEG C, pressure 0.38MPa) of cooling water tank 30, after heat exchange (temperature is 42 DEG C, pressure 0.2MPa), then enter water coolant holding tank 55;
From an effect well heater 1 saturation steam phlegma out, (temperature is 90 DEG C, pressure 0.15MPa) enter plate-type heat exchanger 16, after heat exchange, (temperature is 80 DEG C, pressure 0.10MPa) enter saturation steam condensed fluid collection tank 10, send into triple effect evaporation crystallizer wire mesh demister rinse mouth 43, four-effect evaporation crystallizer wire mesh demister rinse mouth 44 through saturation steam condensate pump 20, triple effect evaporation crystallizer 7, four-effect evaporation crystallizer 8 are rinsed;
From two effect well heaters 2 evaporation condensed water out, (temperature is 83 DEG C, pressure 0.10MPa) enter triple effect well heater 3, after heat exchange, (temperature is 65 DEG C, pressure 0.08MPa), from triple effect well heater 3 evaporation condensed water out, (temperature is 65 DEG C, pressure 0.08MPa) enter quadruple effect well heater 4, after heat exchange, (temperature is 57 DEG C, pressure 0.06MPa), from quadruple effect well heater 4 evaporation condensed water out, (temperature is 57 DEG C, pressure 0.06MPa) enter surface cooler 9, after heat exchange, (temperature is 50 DEG C, pressure 0.04MPa), then evaporative condenser water collecting tank 11 is entered, evaporative condenser water out is pumped into through evaporation condensed water.
As can be seen here, the utility model provides high-concentration salt-containing wastewater quadruple effect vacuum energy-saving evaporative crystallization treatment system, comprehensive energy consumption is low, make full use of the heat of system condensing water to reduce the energy consumption of system, with evaporated water 19T/h (saltiness 8.464%) for calculating, namely 1 ton of steam can evaporate 4.578 tons of brine wastes, and 1 ton of brine waste evaporation needs 218Kg steam; Evaporative crystallization product Industrial Salt quality reaches the purified salt secondary standard requirement of (GBT5462-2003) National Industrial salt standard-required; Operating temperature is low, reduces the energy consumption needed for cooling; Not plugging, non-scaling, grain size number is large, smooth appearance.
Claims (1)
1. high-concentration salt-containing wastewater quadruple effect vacuum energy-saving evaporative crystallization treatment system, comprise raw material storage tank, fresh feed pump, plate-type heat exchanger, one effect well heater, one effect evaporative crystallizer, two effect well heaters, two effect evaporative crystallizers, triple effect well heater, triple effect evaporation crystallizer, quadruple effect well heater, four-effect evaporation crystallizer, surface cooler, slurries bucket, whizzer, crystal holding tank, mother liquor holding tank, mother liquor pump, it is characterized in that: described raw material storage tank is linked in sequence fresh feed pump, plate-type heat exchanger, one effect well heater, one effect evaporative crystallizer, two effect well heaters, two effect evaporative crystallizers, triple effect well heater, triple effect evaporation crystallizer, quadruple effect well heater, four-effect evaporation crystallizer, surface cooler, slurries bucket, whizzer, crystal holding tank, mother liquor holding tank, mother liquor pump, described fresh feed pump outlet is by pipe connecting formula interchanger material inlet, plate-type heat exchanger material outlet is imitated the import of well heater top material by pipeline and and is connected, one effect well heater bottom material outlet is imitated evaporative crystallizer by pipeline and and is connected, imitate recycle pump by pipeline and bottom one effect evaporative crystallizer to be connected, simultaneously, one effect heater base is imitated recycle pump by pipeline and and is connected, one effect circulating-pump outlet is imitated the import of well heater top material by pipeline and and is connected, simultaneously, one effect circulating-pump outlet is imitated the import of well heater top material by pipeline and two and is connected, two effect well heater bottom material outlets are imitated evaporative crystallizer by pipeline and two and are connected, imitate recycle pump by pipeline and two bottom two effect evaporative crystallizers to be connected, simultaneously, two effect heater base are imitated recycle pump by pipeline and two and are connected, two effect circulating-pump outlets are imitated the import of well heater top material by pipeline and two and are connected, simultaneously, two effect circulating-pump outlets are connected with triple effect cycle pump material inlet by pipeline, triple effect evaporation crystalliser feet material outlet is connected with triple effect cycle pump material inlet by pipeline, triple effect cycle pump material outlet is connected with triple effect heater base by pipeline, the outlet of triple effect well heater top material is connected with triple effect evaporation crystallizer top by pipeline, triple effect cycle pump discharge is connected with quadruple effect recycle pump material inlet by pipeline, four-effect evaporation crystallizer bottom material outlet is connected with quadruple effect recycle pump material inlet by pipeline, quadruple effect recycle pump material outlet is connected with quadruple effect heater base by pipeline, the outlet of quadruple effect well heater top material is connected with four-effect evaporation crystallizer top by pipeline, four-effect evaporation crystalliser feet material outlet is connected with discharging pump material inlet by pipeline, discharging pump material outlet is connected with slurries bucket top by pipeline, slurries bottom of the barrel is connected with whizzer by pipeline, whizzer by pipeline respectively with crystal holding tank, mother liquor holding tank connects, mother liquor holding tank is connected with mother liquor pump by pipeline, mother liquor pump discharge is connected with four-effect evaporation crystallizer top by pipeline, one effect well heater top is provided with saturation steam entrance, two effect well heater tops are provided with steam entry, triple effect well heater top is provided with steam entry, quadruple effect well heater top is provided with steam entry, surface cooler top is provided with steam entry, one effect evaporative crystallizer top is provided with steam outlet, two effect evaporative crystallizer tops are provided with steam outlet, triple effect evaporation crystallizer top is provided with steam outlet, four-effect evaporation crystallizer top is provided with steam outlet, saturation steam entrance is connected with steam-jet compression pump by pipeline, steam-jet compression pump is connected with steam storage tank by pipeline, steam entry is all connected with corresponding steam outlet respectively by pipeline, one effect well heater bottom is provided with an effect well heater saturation steam condensate outlet, one effect well heater saturation steam condensate outlet is connected with plate-type heat exchanger saturation steam condensate inlet by pipeline, plate-type heat exchanger saturation steam condensate outlet is connected with saturation steam condensed fluid collection tank by pipeline, saturation steam condensed fluid collection tank is connected with saturation steam condensate pump by pipeline, saturation steam condensate pump connects triple effect evaporation crystallizer wire mesh demister rinse mouth respectively by pipeline, four-effect evaporation crystallizer wire mesh demister rinse mouth, two effect well heater bottoms are provided with two effect heater vaporizes condensation-water drains, two effect heater vaporizes condensation-water drains are connected with triple effect heater vaporizes condensing water inlet by pipeline, triple effect heater vaporizes condensation-water drain is connected with quadruple effect heater vaporizes condensing water inlet by pipeline, quadruple effect heater vaporizes condensation-water drain is connected with surface cooler evaporative condenser water inlet by pipeline, surface cooler evaporative condenser water out is connected with evaporative condenser water collecting tank by pipeline, evaporative condenser water collecting tank is connected with evaporative condenser water pump by pipeline, evaporative condenser water pump is connected with evaporative condenser water out by pipeline, surface cooler top is provided with surface cooler entrance of cooling water, surface cooler cooling water outlet is provided with bottom surface cooler, surface cooler entrance of cooling water is connected with cooling water tank by pipeline, surface cooler cooling water outlet is connected with water coolant holding tank by pipeline, cooling water tank is connected with slurries bucket entrance of cooling water by pipeline, slurries bucket cooling water outlet is connected with water coolant holding tank by pipeline.
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| CN201520873480.2U CN205099396U (en) | 2015-10-29 | 2015-10-29 | High concentration contains energy -conserving evaporation crystallization process system in salt waste water quadruple effect vacuum |
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| CN201520873480.2U CN205099396U (en) | 2015-10-29 | 2015-10-29 | High concentration contains energy -conserving evaporation crystallization process system in salt waste water quadruple effect vacuum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110498549A (en) * | 2019-04-26 | 2019-11-26 | 中创水务科技环保(广东)有限公司 | A kind of crystallization of wastewater treatment combination multiple-effect standpipe divides salt technique and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110498549A (en) * | 2019-04-26 | 2019-11-26 | 中创水务科技环保(广东)有限公司 | A kind of crystallization of wastewater treatment combination multiple-effect standpipe divides salt technique and device |
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