CN106629937A - Waste water processing technology and system - Google Patents
Waste water processing technology and system Download PDFInfo
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- CN106629937A CN106629937A CN201510730117.XA CN201510730117A CN106629937A CN 106629937 A CN106629937 A CN 106629937A CN 201510730117 A CN201510730117 A CN 201510730117A CN 106629937 A CN106629937 A CN 106629937A
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Abstract
The invention provides a waste water processing technology and a system. The system comprise a waste water preheater, an evaporator, a stripping tower, a vapour compressor, a heat exchanger, a noncondensable gas compressor, and a condensed water collector. The invention also provides the waste water processing technology using the system. The waste water processing technology and the system are safe and reliable; equipment is simple; operation cost is low; energy save effect is obvious; and 50 to 95% water resource can be recycled.
Description
Technical field
The present invention relates to environmental protection and field of energy-saving technology, specifically concentration saliferous, the method and apparatus of pbz polymer organic wastewater.
Background technology
High slat-containing wastewater refers to the waste water of total saliferous mass fraction TDS >=1%, typically belongs to used water difficult to degradate.Common high salinity waste water is mainly derived from waste water and industrial production wastewater of seawater substitute discharge etc..The desalting processing technique of high slat-containing wastewater mainly has electroosmose process, hyperfiltration, ion-exchange and evaporation.Organic wastewater is mainly derived from the fields such as chemical industry, road deicing, food processing, also including dyeing waste water, oil exploitation and processing waste water, paper waste and pesticide industry waste water etc..The total amount of high salt organic waste water is huge and increases year by year.If do not processed it before discharge, the soluble inorganic salt of Coal Gas Washing Cycling Water and the toxic organic compound of difficult degradation can cause serious environmental pollution, and soil and surface water, underground water are damaged.Therefore, in today of water scarcity, it is very necessary to research and develop effective high salt Technologies for Organic Wastewater Treatment.
In recent years, foreign countries propose and reclaim waste water with the process of function of mechanical steam recompression evaporation technique.Mechanical vapor recompression technology is a Technolqgy for Energy Economizing for reducing energy demand to external world.Its energy-saving principle is：By the indirect steam produced in system through compressor compresses so as to which pressure and temperature rises, enthalpy increases, and instead of the external heat source that must be adopted in original system, and the latent heat of indirect steam is fully used, so as to reach the purpose of technical process energy-conservation.At present, function of mechanical steam recompression system mainly has application in terms of the waste water recycling devices such as saline sewage, oil field reinjection water, pharmacy waste water.
The content of the invention
It is an object of the invention to provide a kind of waste water treatment process and system, waste water treatment process of the present invention and system have the advantages that safe and reliable, equipment is simple, operating cost is low, energy-saving effect is obvious.
The invention provides a kind of Waste Water Treatment, the system includes waste water preheater, evaporimeter, stripper, vapour compression machine, heat exchanger, fixed gas compressor and apparatus for collecting condensed water；Wherein wastewater feed pipeline Jing waste water preheater is connected with the waterwater entrance of evaporimeter，The steam (vapor) outlet of evaporimeter is connected with the entrance of vapour compression machine，The outlet of vapour compression machine is connected with the heat source stream entrance of heat exchanger，The water out that condenses of heat exchanger is connected with the condensation water inlet of apparatus for collecting condensed water，The fixed gas outlet Jing fixed gases compressor of evaporimeter is connected with the fixed gas entrance of heat exchanger，The fixed gas outlet of heat exchanger is connected with the gas phase entrance of stripper，The gaseous phase outlet of stripper is connected with the heat source stream entrance of evaporimeter，The concentrate floss hole Jing pipelines of base of evaporator are connected with the waterwater entrance of stripper，The concentrate floss hole Jing pipelines of stripper bottom are connected with waste water preheater，The condensation water outlet Jing pipelines of evaporimeter are connected with apparatus for collecting condensed water，The floss hole of apparatus for collecting condensed water is connected with waste water preheater.
In Waste Water Treatment of the present invention, the steam (vapor) outlet of the evaporimeter makes up line with setting steam in the entrance connecting pipeline of vapour compression machine.
In Waste Water Treatment of the present invention, the fixed gas outlet of the evaporimeter makes up line with setting fixed gas in the entrance connecting pipeline of fixed gas compressor.
In Waste Water Treatment of the present invention, described fixed gas compressor can be displacement type compressor, turbo type compressor or heating power type compressor.
In Waste Water Treatment of the present invention, the waste water preheater, heat exchanger can adopt shell-and-tube heat exchanger, heat-pipe heat exchanger, plate type heat exchanger or lamella heat exchanger, it is preferred to use plate type heat exchanger.
In Waste Water Treatment of the present invention, described stripper can be using packed tower and spray column, preferred spray column.
In Waste Water Treatment of the present invention, described evaporimeter can adopt any one in climbing film evaporator, falling film evaporator, horizontal tube evaporator and plate-type evaporator.
In Waste Water Treatment of the present invention, described falling film evaporator includes：Housing, tube sheet, evaporation tube, fluid Supplying apparatus, the tube sheet is arranged on the top of the housing；The evaporation tube is multiple, and multiple evaporation tubes are vertically arranged in the housing, and the upper end of the evaporation tube passes through the tube sheet；The upper end of the evaporation tube is provided with guiding device；The fluid Supplying apparatus include lead channel and point feed pipe, the lead channel is vertically arranged in the outer wall top of the housing, and around the whole housing, the lead channel is uniformly provided with multiple points of charging apertures, described point of charging aperture is arranged on the upper side wall of the lead channel, the lower end of described point of feed pipe passes vertically through point charging aperture and stretches in the lead channel, and the lower end of described point of feed pipe is near the bottom of the lead channel；The housing is provided with multiple overflow ducts connected with the lead channel.
Wherein, described point of feed pipe is removably mounted in the lead channel.
Wherein, multiple impingement baffles are provided with the lead channel, multiple impingement baffles are evenly arranged in the bottom of the lead channel.
Wherein, the impingement baffle is provided with via.
Wherein, the height of the impingement baffle and the depth ratio of the lead channel are 1/3～3/5.
Wherein, the inwall of the housing is provided with an overflow baffle, and the overflow baffle is fixed on the inwall of the housing, and the overflow baffle forms cloth liquid passage with the inner walls and tube sheet.
Wherein, the overflow baffle is cylinder, and section is in class inverted " L " font.
Wherein, the evaporation tube is evenly arranged in the housing.
In Waste Water Treatment of the present invention, described vapour compression machine can adopt centrifugal compressor, screw compressor, reciprocating compressor and centrifugal high pressure fan；The compression ratio one of the compressor selects 1.3 ~ 2.0, preferably 1.4 ~ 1.7.
The present invention also provides a kind of waste water treatment process, and using said system, the technique includes：
Using waste water preheater, it is used to process raw material waste water, condensate and stripper concentrate, and raw material waste water, condensate and stripper concentrate are exchanged heat in waste water preheater, obtain it is preheated after raw material waste water, cooling condensate and cooling concentrate；
Using evaporimeter, it is used to process the raw material waste water come after waste water preheater preheating of hanging oneself, and the 1st stream, the 2nd stream of liquid phase, fixed gas and the condensate of gas phase are obtained after process；
Using vapour compression machine, it is used to process the 1st stream of flash-pot, and the 3rd stream of gas phase is obtained after process；
Using fixed gas compressor, it is used to process the fixed gas for carrying out flash-pot, obtains the 4th stream of gas phase；
Using heat exchanger, it is used to process the 3rd stream and the 4th stream of fixed gas compressor from vapour compression machine, the 5th stream and the 6th stream of liquid phase of the gas phase obtained after process；
Using apparatus for collecting condensed water, it is used to receive the 6th stream of the condensate of evaporimeter and heat exchanger, and the 7th stream of liquid phase is obtained after process；
Using stripper, it is used to process the 2nd stream of flash-pot and the 5th stream of heat exchanger, and the 8th stream of gas phase and the 9th stream of liquid phase are obtained after process.
In handling process of the present invention, raw material waste water in waste water preheater by with condensate, stripper concentrate exchange heat to close to after saturation temperature enter evaporimeter in, it is evaporated in evaporimeter, the steam for obtaining is Jing after vapour compression machine compression, the latent heat of steam is improved, again the thermal source with compressed steam as heat exchanger heats fixed gas, the concentrate of base of evaporator carries out stripping evaporation in stripper, stripping in stripper is entered as carrier gas using the fixed gas after heating and is concentrated by evaporation waste water, the mass-and heat-transfer efficiency that fixed gas improves stripper is introduced in stripper, fouling and clogging of the waste water in stripper can be prevented effectively from.The steam that evaporation is stripped in stripper and the fixed gas being introduced into are mixed in evaporimeter, as the heat source of evaporimeter, its steam is condensed into condensed water, fixed gas is compressed by the fixed gas outlet of evaporimeter into fixed gas compressor, and the fixed gas after compression is heated to be recycled in stripper.The concentrate of stripper bottom carries out heat exchange with waste water in waste water preheater and reclaims heat.
In handling process of the present invention, raw material waste water, by exchanging heat to 90 DEG C～102 DEG C with condensate, stripper concentrate, is entered in evaporimeter in waste water preheater after preferably 95 DEG C～100 DEG C.
In handling process of the present invention, the logarithm heat transfer temperature difference in the evaporimeter between steam and waste water be 3 DEG C～10 DEG C, preferably 4 DEG C～8 DEG C, meanwhile, in the evaporimeter waste water evaporation vaporization rate be 5%～50%, preferably 10%～40%.
In handling process of the present invention, fixed gas is exchanged heat in heat exchanger with the steam Jing after vapour compression machine compression, and temperature is 110 DEG C ~ 115 DEG C after heat exchange.
In handling process of the present invention, the fixed gas can be air, nitrogen, oxygen, steam etc..
In handling process of the present invention, when system goes into operation, need to be gone into operation thermal source as system with the extraneous steam of system, the steam can be made up line in introducing system by steam；If the steam that system is produced in running can not maintain system thermal to consume quantity of steam, can be made up line introducing steam by steam；If the steam that system is produced in running is more than maintaining system thermal to consume quantity of steam, unnecessary steam can be by supplementary steam pipe line discharge system.
In handling process of the present invention, when device goes into operation, needs make up line from fixed gas and fixed gas are introduced into stripper.
In handling process of the present invention, described evaporimeter can adopt any one in climbing film evaporator, falling film evaporator, horizontal tube evaporator and plate-type evaporator.
In handling process of the present invention, described falling film evaporator includes：Housing, tube sheet, evaporation tube, fluid Supplying apparatus, the tube sheet is arranged on the top of the housing；The evaporation tube is multiple, and multiple evaporation tubes are vertically arranged in the housing, and the upper end of the evaporation tube passes through the tube sheet；The upper end of the evaporation tube is provided with guiding device；The fluid Supplying apparatus include lead channel and point feed pipe, the lead channel is vertically arranged in the outer wall top of the housing, and around the whole housing, the lead channel is uniformly provided with multiple points of charging apertures, described point of charging aperture is arranged on the upper side wall of the lead channel, the lower end of described point of feed pipe passes vertically through point charging aperture and stretches in the lead channel, and the lower end of described point of feed pipe is near the bottom of the lead channel；The housing is provided with multiple overflow ducts connected with the lead channel.
Wherein, described point of feed pipe is removably mounted in the lead channel.
Wherein, multiple impingement baffles are provided with the lead channel, multiple impingement baffles are evenly arranged in the bottom of the lead channel.
Wherein, the impingement baffle is provided with via.
Wherein, the height of the impingement baffle and the depth ratio of the lead channel are 1/3～3/5.
Wherein, the inwall of the housing is provided with an overflow baffle, and the overflow baffle is fixed on the inwall of the housing, and the overflow baffle forms cloth liquid passage with the inner walls and tube sheet.
Wherein, the overflow baffle is cylinder, and section is in class inverted " L " font.
Wherein, the evaporation tube is evenly arranged in the housing.
Other technologies in handling process of the present invention, the content as known to water pump, heat heat exchange, condensate water collecting etc. are those skilled in the art.
Compared with prior art, waste water treatment process of the present invention has the advantage that with system：
1st, in waste water treatment process of the present invention, waste water is concentrated by evaporation to reclaim and strips group technology using steam mechanical recompression and fixed gas, and the water resource for being capable of achieving 50% ~ 95% is recycled.By controlling cocnentration factor of the waste water in evaporimeter, it is to avoid waste water occurs fouling in evaporimeter, concentrate is further concentrated in stripper.
2nd, by introducing compression fixed gas into stripper in waste water treatment process of the present invention, improve the heat and mass transfer coefficient of waste water evaporation and concentration, the heat needed in stripper is brought in tower by fixed gas, so that fixed gas and waste water direct heat transfer, efficiently avoid the problem of fouling and clogging in conventional economic benefits and social benefits steam mechanical recompression technique.
3rd, heat exchanger is provided with waste water treatment process of the present invention, realizes the latent heat of compressed steam through heat exchange to fixed gas, heat is directly entered in waste water, improves the utilization ratio of vapor compression heat energy.
4th, it is simple and compact for structure by using the falling film evaporator with lateral charging in waste water treatment process of the present invention and system, effectively reduce the height of equipment；Liquid flow flux is big, operation, easy to maintenance；Using the equipment liquid distribution rate it is high, cloth film is uniform, be not easily blocked, be readily cleaned, and can increase the arrangement quantity of evaporation tube, increases the heat exchange area of evaporimeter.
5th, thing waste water treatment process of the present invention and system have that safe and reliable, equipment is simple, it is low to invest, the features such as.
Description of the drawings
Fig. 1 is waste water treatment process of the present invention and system schematic.
Fig. 2 is the half-sectional structure front view of falling film evaporator used by the present invention.
Fig. 3 is the top view that the part of falling film evaporator used by the present invention is cutd open.
Fig. 4 is the impingement baffle schematic diagram of falling film evaporator used by the present invention.
Specific embodiment
The concrete condition of the present invention is further illustrated below by specific embodiment, but is not limited to following embodiments.
As shown in figure 1, the invention provides a kind of Waste Water Treatment, the processing meanss include waste water preheater 2, evaporimeter 5, stripper 11, vapour compression machine 8, heat exchanger 24, fixed gas compressor 14 and apparatus for collecting condensed water 20；Wherein wastewater feed pipeline Jing waste water preheater 2 is connected with the waterwater entrance of evaporimeter 5，The steam (vapor) outlet of evaporimeter 5 is connected with the entrance of vapour compression machine 8，Steam is set in the steam (vapor) outlet of the evaporimeter 5 and the entrance connecting pipeline of vapour compression machine 8 and makes up line 7，The outlet of vapour compression machine 8 is connected with the heat source stream entrance of heat exchanger 24，The water out that condenses of heat exchanger 24 is connected with the condensation water inlet of apparatus for collecting condensed water 20，The fixed gas outlet Jing fixed gases compressor 14 of evaporimeter 5 is connected with the fixed gas entrance of heat exchanger 24，Fixed gas is set in the fixed gas outlet of the effect evaporimeter 5 and the entrance connecting pipeline of fixed gas compressor 14 and makes up line 23，The fixed gas outlet of heat exchanger 24 is connected with the gas phase entrance of stripper 11，The gaseous phase outlet of stripper 11 is connected with the heat source stream entrance of evaporimeter 5，The concentrate floss hole Jing pipelines of the bottom of evaporimeter 5 are connected with the waterwater entrance of stripper 11，The concentrate floss hole Jing pipelines of the bottom of stripper 11 are connected with waste water preheater 2，The condensation water outlet Jing pipelines of evaporimeter 5 are connected with apparatus for collecting condensed water 20，The floss hole of apparatus for collecting condensed water 20 is connected with waste water preheater 2.
The present invention also provides a kind of waste water treatment process, and using said system, the technique includes：
Using waste water preheater 2, it is used to process raw material waste water 1, condensate 21 and stripper concentrate 15, raw material waste water 1, condensate 21 and stripper concentrate 15 are exchanged heat in waste water preheater 2, obtain it is preheated after raw material waste water 3, cooling condensate 22 and cooling concentrate 17；
Using evaporimeter 5, it is used to process the raw material waste water 3 come after waste water preheater preheating of hanging oneself, and the 2nd stream 10, fixed gas 13 and the condensate 18 of the 1st stream 6, liquid phase of gas phase are obtained after process；
Using vapour compression machine 8, it is used to process the 1st stream 6 of flash-pot, and the 3rd stream 9 of gas phase is obtained after process；
Using fixed gas compressor 14, it is used to process the fixed gas 13 of flash-pot, and the 4th stream 16 of gas phase is obtained after process；
Using heat exchanger 24, it is used to process the 3rd stream 9 and the 4th stream 16 of fixed gas compressor from vapour compression machine, the 5th stream and the 6th stream 19 of liquid phase of the gas phase obtained after process；
Using apparatus for collecting condensed water, it is used to receive the 6th stream 19 of the condensate 18 of evaporimeter and heat exchanger, and the 7th stream 21 of liquid phase is obtained after process；
Using stripper 11, it is used to process the 2nd stream of flash-pot and the 5th stream of heat exchanger, and the 8th stream 12 of gas phase and the 9th stream 15 of liquid phase are obtained after process.
In the inventive method, raw material waste water 1 in waste water preheater 2 by with condensate 21, stripper concentrate 15 exchange heat to close to after saturation temperature enter evaporimeter 5 in, it is evaporated in evaporimeter 5, the steam for obtaining is Jing after the compression of vapour compression machine 8, the latent heat of steam is improved, then compressed steam 9 heats fixed gas as the heat source stream of heat exchanger 24, fixed gas after heating strips the concentrate 10 that evaporation comes the bottom of flash-pot 5 in stripper 11, fixed gas stripping concentration waste water is introduced in stripper, improve the mass-and heat-transfer efficiency of stripper 11, fouling and clogging of the waste water in stripper 11 can be prevented effectively from.The steam that evaporation is stripped in stripper 11 and the fixed gas being introduced into are mixed in evaporimeter 5, as the heat source of evaporimeter 5, steam is condensed into condensed water 18, fixed gas 13 is compressed by the fixed gas outlet of evaporimeter 5 into fixed gas compressor 14, and the fixed gas 16 after compression is heated to be recycled in stripper 11.The concentrate 15 of the bottom of stripper 11 enters heat exchange and reclaims heat in waste water preheater 2 with waste water.
As shown in Fig. 2,3 and 4, the falling film evaporator of the lateral charging of the present invention, including：Housing 11, tube sheet 1, evaporation tube 3, fluid Supplying apparatus 20.Housing 11 is cylindrical shape, and tube sheet 1 is arranged on the top of housing 11, and the upper surface of tube sheet 1 constitutes cloth film room with the part on the top of housing 11.Evaporation tube 3 is multiple, and multiple evaporation tubes 3 are vertically arranged in housing 11, and preferred evaporation tube is evenly distributed.The upper end of evaporation tube 3 passes through tube sheet 1, arranges multiple evaporation pores on tube sheet 1, and the upper end of evaporation tube 3 is stretched out from evaporation pore, and the method such as connects and be tightly connected with tube sheet 1 using welding or rising.Guiding device 2 is provided with the upper end of evaporation tube 3.Fluid Supplying apparatus 20 include lead channel 6 and multiple points of feed pipes 7, in the present embodiment, lead channel 6 is the toroidal shell groove of an interior side opening, the internal diameter of toroidal shell groove is identical with the external diameter of housing 11, lead channel 6 is vertically arranged in the outer wall top of housing 11 by welding, and around whole housing 11, the side of the opening of lead channel 6 is using the lateral wall of housing 11 as shared side wall.Lead channel 6 is uniformly provided with multiple points of charging apertures 13, and the quantity of point charging aperture 13 is identical with point feed pipe 7, and for installing a point feed pipe 7, specific to the present embodiment, the quantity of point charging aperture is 8.Charging aperture 13 is divided to be arranged on the upper side wall of lead channel 6, the lower end of point feed pipe 7 passes vertically through point charging aperture 13 and stretches in lead channel 6, and the lower end outlet of point feed pipe 7 is near the bottom of lead channel 6.Divide feed pipe 7 to be used to be connected with charging house steward 10, material is provided in feed well 6 by a point feed pipe 7 from charging house steward 10.Housing 11 is provided with multiple overflow ducts 5 connected with lead channel 6, and overflow ducts 5 are the crest of weir near the upper side wall of lead channel 6, and conventional structure has rectangular weir, V-type weir and round bottom rectangular weir.
Further, feed pipe 7 is divided to be removably mounted in lead channel 6 by flange.Specifically, one ring flange 71 of lateral wall welded and installed of feed pipe 7, ring flange 71 is divided to link together by bolt assembly with the upper side wall of lead channel 6, can be dismantled as needed.
Further, multiple impingement baffles 8 are provided with lead channel 6, multiple impingement baffles 8 are evenly arranged in the bottom of lead channel 6, in the present embodiment, the quantity of impingement baffle 8 is 16.Preferably, lower end outlet of the upper edge of impingement baffle 8 higher than point feed pipe 7.With reference to shown in Fig. 4, impingement baffle 8 is provided with via 81, and the section of via 81 is preferably circular, its a diameter of 5-30 millimeter, preferred 10-20 millimeters.Preferably, the height of impingement baffle 8 and the depth ratio of lead channel 6 are 1/3 ~ 3/5, and such as height of impingement baffle 8 is 1/3,3/7,1/2 and the 3/5 of feed liquor groove depth 6.
Further, the inwall of housing 11 is provided with an overflow baffle 4, and overflow baffle 4 is cylinder, and the external diameter of overflow baffle 4 is less than the internal diameter of housing 11.Overflow baffle 4 is fixed on the inwall of housing 11, and the lower edge of overflow baffle 4 by multiple rectangle gripper shoes 12 higher than the upper surface of tube sheet 1, and overflow baffle 4 forms cloth liquid passage with the inwall of housing 11 and tube sheet 1.The cross-sectional width of cloth liquid passage is less than the inwall of housing 11 and the minimum range of evaporation tube 3.
Embodiment 1
Using the system described in Fig. 1, using the device described in Fig. 2, waste water used is ammonium sulfate waste water to the evaporimeter, and raw material waste strength is 20wt%, and raw material wastewater treatment capacity is 15t/h, and normal temperature waste water is preheated to 99 DEG C through preheater 2, in evaporimeter 5.The compression ratio of vapour compression machine 8 is 1.5, uses air as supplementary fixed gas.The concentrate 10 that the bottom of evaporimeter 5 is discharged is 32wt%, and Jing after stripper stripping is concentrated by evaporation, the concentrate 15 of discharge is 45wt% to the concentrate 10.The temperature Jing after heat recovery of condensate 21 is 45 DEG C or so, and condensate-water polishing amount is 8.3 t/h.
Claims (33)
1. a kind of Waste Water Treatment, the system includes waste water preheater, evaporimeter, stripper, vapour compression machine, heat exchanger, fixed gas compressor and apparatus for collecting condensed water；Wherein wastewater feed pipeline Jing waste water preheater is connected with the waterwater entrance of evaporimeter，The steam (vapor) outlet of evaporimeter is connected with the entrance of vapour compression machine，The outlet of vapour compression machine is connected with the heat source stream entrance of heat exchanger，The water out that condenses of heat exchanger is connected with the condensation water inlet of apparatus for collecting condensed water，The fixed gas outlet Jing fixed gases compressor of evaporimeter is connected with the fixed gas entrance of heat exchanger，The fixed gas outlet of heat exchanger is connected with the gas phase entrance of stripper，The gaseous phase outlet of stripper is connected with the heat source stream entrance of evaporimeter，The concentrate floss hole Jing pipelines of base of evaporator are connected with the waterwater entrance of stripper，The concentrate floss hole Jing pipelines of stripper bottom are connected with waste water preheater，The condensation water outlet Jing pipelines of evaporimeter are connected with apparatus for collecting condensed water，The floss hole of apparatus for collecting condensed water is connected with waste water preheater.
2. according to the system described in claim 1, it is characterised in that：The steam (vapor) outlet of the evaporimeter makes up line with setting steam in the entrance connecting pipeline of vapour compression machine.
3. according to the system described in claim 1, it is characterised in that：The fixed gas outlet of the evaporimeter makes up line with setting fixed gas in the entrance connecting pipeline of fixed gas compressor.
4. according to the system described in claim 1, it is characterised in that：Described fixed gas compressor is displacement type compressor, turbo type compressor or heating power type compressor.
5. according to the system described in claim 1, it is characterised in that：The waste water preheater, heat exchanger adopt shell-and-tube heat exchanger, heat-pipe heat exchanger, plate type heat exchanger or lamella heat exchanger, it is preferred to use plate type heat exchanger.
6. according to the system described in claim 1, it is characterised in that：Described stripper is using packed tower and spray column, preferred spray column.
7. according to the system described in claim 1, it is characterised in that：Described evaporimeter is using any one in climbing film evaporator, falling film evaporator, horizontal tube evaporator and plate-type evaporator.
8. according to the system described in claim 1, it is characterised in that：Described falling film evaporator includes：Housing, tube sheet, evaporation tube, fluid Supplying apparatus, the tube sheet is arranged on the top of the housing；The evaporation tube is multiple, and multiple evaporation tubes are vertically arranged in the housing, and the upper end of the evaporation tube passes through the tube sheet；The upper end of the evaporation tube is provided with guiding device；The fluid Supplying apparatus include lead channel and point feed pipe, the lead channel is vertically arranged in the outer wall top of the housing, and around the whole housing, the lead channel is uniformly provided with multiple points of charging apertures, described point of charging aperture is arranged on the upper side wall of the lead channel, the lower end of described point of feed pipe passes vertically through point charging aperture and stretches in the lead channel, and the lower end of described point of feed pipe is near the bottom of the lead channel；The housing is provided with multiple overflow ducts connected with the lead channel.
9. according to the system described in claim 8, it is characterised in that：Described point of feed pipe is removably mounted in the lead channel.
10. according to the system described in claim 8, it is characterised in that：Multiple impingement baffles are provided with the lead channel, multiple impingement baffles are evenly arranged in the bottom of the lead channel.
11. according to the system described in claim 10, it is characterised in that：The impingement baffle is provided with via.
12. according to the system described in claim 11, it is characterised in that：The height of the impingement baffle is 1/3～3/5 with the depth ratio of the lead channel.
13. according to the system described in claim 8, it is characterised in that：The inwall of the housing is provided with an overflow baffle, and the overflow baffle is fixed on the inwall of the housing, and the overflow baffle forms cloth liquid passage with the inner walls and tube sheet.
14. according to the system described in claim 13, it is characterised in that：The overflow baffle is cylinder, and section is in class inverted " L " font.
15. according to the system described in claim 8, it is characterised in that：The evaporation tube is evenly arranged in the housing.
16. according to the system described in claim 8, it is characterised in that：Described vapour compression machine can adopt centrifugal compressor, screw compressor, reciprocating compressor and centrifugal high pressure fan；The compression ratio one of the compressor selects 1.3 ~ 2.0, preferably 1.4 ~ 1.7.
17. a kind of waste water treatment process, using the system described in any claim in claim 1-16, it is characterised in that：The technique includes：
Using waste water preheater, it is used to process raw material waste water, condensate and stripper concentrate, and raw material waste water, condensate and stripper concentrate are exchanged heat in waste water preheater, obtain it is preheated after raw material waste water, cooling condensate and cooling concentrate；
Using evaporimeter, it is used to process the raw material waste water come after waste water preheater preheating of hanging oneself, and the 1st stream, the 2nd stream of liquid phase, fixed gas and the condensate of gas phase are obtained after process；
Using vapour compression machine, it is used to process the 1st stream of flash-pot, and the 3rd stream of gas phase is obtained after process；
Using fixed gas compressor, it is used to process the fixed gas for carrying out flash-pot, obtains the 4th stream of gas phase；
Using heat exchanger, it is used to process the 3rd stream and the 4th stream of fixed gas compressor from vapour compression machine, the 5th stream and the 6th stream of liquid phase of the gas phase obtained after process；
Using apparatus for collecting condensed water, it is used to receive the 6th stream of the condensate of evaporimeter and heat exchanger, and the 7th stream of liquid phase is obtained after process；
Using stripper, it is used to process the 2nd stream of flash-pot and the 5th stream of heat exchanger, and the 8th stream of gas phase and the 9th stream of liquid phase are obtained after process.
18. according to the technique described in claim 17, it is characterised in that：Raw material waste water exchanges heat to 90 DEG C～102 DEG C in waste water preheater, enters in evaporimeter after preferably 95 DEG C～100 DEG C.
19. according to the technique described in claim 17, it is characterised in that：Logarithm heat transfer temperature difference in the evaporimeter between steam and waste water is 3 DEG C～10 DEG C, preferably 4 DEG C～8 DEG C.
20. according to the technique described in claim 17, it is characterised in that：The vaporization rate of waste water evaporation is 5%～50%, preferably 10%～40% in the evaporimeter.
21. according to the technique described in claim 17, it is characterised in that：When system goes into operation, need to be gone into operation thermal source as system with the extraneous steam of system, the steam can be made up line in introducing system by steam；If the steam that system is produced in running can not maintain system thermal to consume quantity of steam, can be made up line introducing steam by steam；If the steam that system is produced in running is more than maintaining system thermal to consume quantity of steam, unnecessary steam can be by supplementary steam pipe line discharge system.
22. according to the technique described in claim 17, it is characterised in that：When device goes into operation, needs make up line from fixed gas and fixed gas are introduced into stripper.
23. according to the technique described in claim 17, it is characterised in that：Fixed gas is exchanged heat in heat exchanger with the steam Jing after vapour compression machine compression, and the temperature of fixed gas is 110 DEG C ~ 115 DEG C after heat exchange.
24. according to the technique described in claim 17, it is characterised in that：The fixed gas can be air, nitrogen, oxygen, steam etc..
25. according to the technique described in claim 17, it is characterised in that：Described evaporimeter can adopt any one in climbing film evaporator, falling film evaporator, horizontal tube evaporator and plate-type evaporator.
26. according to the technique described in claim 17, it is characterised in that：Described falling film evaporator includes：Housing, tube sheet, evaporation tube, fluid Supplying apparatus, the tube sheet is arranged on the top of the housing；The evaporation tube is multiple, and multiple evaporation tubes are vertically arranged in the housing, and the upper end of the evaporation tube passes through the tube sheet；The upper end of the evaporation tube is provided with guiding device；The fluid Supplying apparatus include lead channel and point feed pipe, the lead channel is vertically arranged in the outer wall top of the housing, and around the whole housing, the lead channel is uniformly provided with multiple points of charging apertures, described point of charging aperture is arranged on the upper side wall of the lead channel, the lower end of described point of feed pipe passes vertically through point charging aperture and stretches in the lead channel, and the lower end of described point of feed pipe is near the bottom of the lead channel；The housing is provided with multiple overflow ducts connected with the lead channel.
27. according to the technique described in claim 26, it is characterised in that：Described point of feed pipe is removably mounted in the lead channel.
28. according to the technique described in claim 26, it is characterised in that：Multiple impingement baffles are provided with the lead channel, multiple impingement baffles are evenly arranged in the bottom of the lead channel.
29. according to the technique described in claim 28, it is characterised in that：The impingement baffle is provided with via.
30. according to the technique described in claim 29, it is characterised in that：The height of the impingement baffle is 1/3～3/5 with the depth ratio of the lead channel.
31. according to the technique described in claim 26, it is characterised in that：The inwall of the housing is provided with an overflow baffle, and the overflow baffle is fixed on the inwall of the housing, and the overflow baffle forms cloth liquid passage with the inner walls and tube sheet.
32. according to the technique described in claim 31, it is characterised in that：The overflow baffle is cylinder, and section is in class inverted " L " font.
33. according to the technique described in claim 26, it is characterised in that：The evaporation tube is evenly arranged in the housing.
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| CN109173559A (en) * | 2018-10-19 | 2019-01-11 | 吉林工商学院 | A kind of condensation cycle gain of heat batch circulating grain products drying energy saving device |
| CN111526938A (en) * | 2017-10-26 | 2020-08-11 | 阿法拉伐奥米有限公司 | Shell-and-tube device with distribution device |
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| CN106629937B (en) | 2020-05-19 |
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