CN106630339A - Organic matter-containing wastewater treatment method and device - Google Patents
Organic matter-containing wastewater treatment method and device Download PDFInfo
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- CN106630339A CN106630339A CN201510730155.5A CN201510730155A CN106630339A CN 106630339 A CN106630339 A CN 106630339A CN 201510730155 A CN201510730155 A CN 201510730155A CN 106630339 A CN106630339 A CN 106630339A
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Abstract
The invention provides an organic matter-containing wastewater treatment method and device. The treatment device comprises a wastewater pre-heater, an evaporator, a scaling device, a first-effect steam compressor, a second-effect steam compressor and a condensation water collector. The invention also provides the organic matter-containing wastewater treatment method adopting the device. The wastewater treatment method and device provided by the invention have the advantages of safety, reliability, simple equipment, low operating cost, obvious energy saving effect and the like.
Description
Technical field
The present invention relates to a kind for the treatment of method and apparatus containing organic wastewater of environmental protection and field of energy-saving technology, the method and apparatus for specifically processing oil-refining chemical pbz polymer organic compound waste water.
Background technology
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.At present, the treatment technology of high salt organic waste water is more, mainly there is physical-chemical process, bioanalysis and combinations thereof technique.
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.Application is yet there are no in terms of pbz polymer organic compound waste water recycling device.Due to the macromolecule organic containing easy coking, fouling in organic wastewater, in the evaporimeter of function of mechanical steam recompression system, with the continuous evaporation of moisture content, organic wastewater is through concentration, boiling point will increase, macromolecule organic will coking, fouling in dope, and be attached on the heat-transfer surface of evaporimeter, evaporator heat exchange efficiency is had a strong impact on, and then the blocking of evaporimeter, pipeline can be caused.
Patent CN102641603A and CN102553274A individually disclose the plate-type evaporator with Mechanical Vapor Compression and tubular evaparator device, at 60 DEG C or so, the vacuum in patent CN102553274A in evaporimeter is 0.05～0.098MPa to operation temperature general control in patent CN102641603A in plate-type evaporator.Two kinds of low temperature are evaporated in vacuo mode, reduce the boiling point of material, and the method is suitable for the evaporation and concentration of heat sensitive material and easy fouling material.
Patent CN104001339A discloses a kind of MVR plate evaporations system, evaporates the indirect steam for producing temperature and pressure Jing after compressor compression and improves, and improves the grade of steam so that low temperature position steam can be reused.Multiple-effect evaporation portion can be set in the method vapo(u)rization system so that MVR plate evaporation system applications are wider, but with the increase of evaporation effect number in vapo(u)rization system, the energy efficiency coefficient of Mechanical Vapor Compression will be reduced so that the energy consumption of vapo(u)rization system increases.
CN202315333U, CN203170039U disclose a kind of steam mechanical Compression Evaporation equipment, the utility model is effectively utilized the indirect steam of evaporimeter generation, indirect steam latent heat after pressure-raising increases, using the steam latent heat heated waste water after pressure-raising, reach the purpose for reclaiming water resource, the method has obvious energy-saving effect, but equipment evaporimeter in application process has fouling.
The content of the invention
It is an object of the invention to provide a kind for the treatment of method and apparatus containing organic wastewater, method of wastewater treatment of the present invention and device 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 processing meanss containing organic wastewater, the processing meanss include waste water preheater, evaporimeter, fouling device, the first effect vapour compression machine, the second effect vapour compression machine and apparatus for collecting condensed water；Wherein wastewater feed pipeline Jing waste water preheater is connected with the waterwater entrance of evaporimeter, steam (vapor) outlet at the top of evaporimeter is connected with the entrance of the first effect vapour compression machine, the outlet of the first effect vapour compression machine is connected with the heat source stream entrance of evaporimeter, the condensation water outlet Jing pipelines of evaporimeter are connected with apparatus for collecting condensed water, the concentrate floss hole Jing pipelines of base of evaporator are connected with the entrance of fouling device, steam (vapor) outlet at the top of fouling device is connected with the entrance of the second effect vapour compression machine, the outlet of the second effect vapour compression machine is connected with the heat source stream entrance of fouling device, the condensation water outlet Jing pipelines of fouling device are connected with apparatus for collecting condensed water, the floss hole of apparatus for collecting condensed water is connected with waste water preheater, the concentrate floss hole Jing pipelines of fouling device are connected with the waterwater entrance of evaporimeter, fouling device bottom is provided with dirt floss hole.
In processing meanss containing organic wastewater of the present invention, outlet and the setting in the heat source stream entrance connecting pipeline of evaporimeter of the first effect vapour compression machine supplement steam pipe line.
In processing meanss containing organic wastewater of the present invention, outlet and the setting in the heat source stream entrance connecting pipeline of fouling device of the second effect vapour compression machine supplement steam pipe line.
In processing meanss containing organic wastewater of the present invention, the waste water preheater 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 processing meanss containing organic wastewater 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 processing meanss containing organic wastewater 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 processing meanss containing organic wastewater of the present invention, described fouling device is jacket type structure, heated by heat source stream in chuck, the heat source stream is that fouling device evaporates the steam for producing steam again Jing after mechanical compress, and fouling device inner homogeneous arrange 2～6 scraping blades, are preferably provided with 2～4 scraping blades, the scraping blade is driven in fouling device internal rotating by motor, in process of production, scraping blade continuously rotates, and rotary speed is 200r/min～360r/min.
In processing meanss of the present invention containing organic wastewater, described first effect vapour compression machine, the second effect vapour compression machine can adopt the one kind in centrifugal compressor, screw compressor, reciprocating compressor, centrifugal high pressure fan；The first effect vapour compression machine, the compression ratio of the second effect vapour compression machine are 1.3～2.0, preferably 1.4～1.7.
The present invention also provides a kind of processing method containing organic wastewater, and using said apparatus of the present invention, methods described includes：
Using waste water preheater, it is used to process raw material waste water and condensate, and raw material waste water and condensate are exchanged heat in waste water preheater, obtain after process it is preheated after raw material waste water and condensation condensate；
Using evaporimeter, it is used to process come the raw material waste water of waste water preheater preheating of hanging oneself, and the 1st stream, the 2nd stream of liquid phase and the condensate of gas phase are obtained after process；
Using the first effect 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, and the 3rd stream is used as heat source stream Returning evaporimeter；
Using fouling device, it is used to process the 2nd stream of flash-pot, and the 4th stream, the 5th stream of liquid phase, dirt and the condensate of gas phase are obtained after process, and the 5th stream enters evaporimeter after mixing with the raw material waste water after preheating；
Using apparatus for collecting condensed water, it is used to receive the condensate of the condensate of evaporimeter and fouling device；
Using the second effect vapour compression machine, it is used to process the 4th stream from fouling device, and the 6th stream of gas phase is obtained after process, and the 6th stream returns fouling device as heat source stream.
In the inventive method, raw material waste water is mixed in evaporimeter in waste water preheater by exchanging heat to the concentrate discharged with fouling device close to after saturation temperature with condensate, it is evaporated in evaporimeter, after the steam for obtaining is compressed again by the first effect vapour compression machine, the latent heat of steam is improved, with compressed steam as evaporimeter evaporation thermal source.
In the inventive method, raw material waste water is in waste water preheater by exchanging heat to 95 DEG C～102 DEG C with condensate, it is preferred that 98 DEG C～100 DEG C, then it is mixed in evaporimeter with the concentrate of fouling device, organic concentration is as unsaturated concentration with the mixed liquor for ensureing to be evaporated in evaporimeter.
In the inventive method, logarithm heat transfer temperature difference in the evaporimeter between steam and waste water is 3 DEG C～10 DEG C, it is preferred that 4 DEG C～8 DEG C, simultaneously, the vaporization rate of waste water evaporation is 5%～50% in the evaporimeter, it is preferred that 10%～40%, it is close saturation but unsaturated concentration to make to be emitted into organic concentration in the liquid of fouling device after evaporation and concentration, and coking is produced in evaporimeter so as to be effectively prevented from organic matter.
In the inventive method, the operation temperature of the fouling device be the boiling temperature for concentrating waste water to higher than 1 DEG C～5 DEG C of boiling temperature, operating pressure is normal pressure.
In the inventive method, when device goes into operation, need to be gone into operation thermal source as device with the extraneous steam of device.Steam can be by supplementary steam pipe line introducing device；If device is in running, when the steam of the generation of the processing meanss can not maintain device heat consumption quantity of steam, steam can be introduced by steam pipe line is supplemented；If device is in running, when the steam that wastewater treatment equipment is produced is more than device heat consumption quantity of steam is maintained, discharge steam can be by supplementary steam pipe line discharger.
In the inventive method, 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 the inventive method, the content as known to water pump, heat heat exchange, condensate water collecting etc. are those skilled in the art.
Compared with prior art, method of wastewater treatment containing organic matter of the present invention and device have the advantage that：
1st, in method of wastewater treatment containing organic matter of the invention and device, waste water is concentrated by evaporation to reclaim and is reclaimed using economic benefits and social benefits steam mechanical recompression forced circulation technique, is capable of achieving 85%～99% water resource and is recycled.
2nd, in method of wastewater treatment containing organic matter of the invention and device, the second effect vapor recompression system mainly passes through Secondary-steam heating waste water in the present invention, allow wastewater temperature to reach, be even above the temperature of its easy fouling, to realize reaching the purpose of the organic matter in removing waste water, and the present invention increased fouling device after forced circulation pump, useless Organic substance in water is made in the inner surface fouling of fouling device and is removed, it is to avoid recycling waste water fouling in evaporimeter so that device long period steady running.
3rd, in method of wastewater treatment containing organic matter of the invention and device, charging waste water and recycling waste water are mixed into into evaporimeter, so as to reach the purpose of dilution recycling waste water, can further reduce fouling of evaporator risk.
4th, in method of wastewater treatment containing organic matter of the invention and device, economic benefits and social benefits steam mechanical recompression forced circulation technique has been effectively combined the advantage of the economic benefits and social benefits steam mechanical compression process of forced circulation vapor recompression technique and routine, fouling device is set, realize the conversion of fouling locus, both the purpose of energy-conservation had been reached, also fouling of evaporator problem can be effectively prevented, it is ensured that the high efficient heat exchanging effect of evaporimeter, it is to avoid the problems such as equipment scaling, coking and blocking.
5th, it is simple and compact for structure by using the falling film evaporator with lateral charging in method of wastewater treatment containing organic matter of the invention and device, 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.
6th, method of wastewater treatment containing organic matter of the invention and device have that safe and reliable, equipment is simple, investment is low, the features such as.
Description of the drawings
Fig. 1 is schematic flow sheet of the present invention containing organic matter method of wastewater treatment.
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.
The invention provides a kind of processing meanss containing organic wastewater, the processing meanss include waste water preheater 2, evaporimeter 6, effect vapour compression machine 8, the second effect vapour compression machine 15 of fouling device 13, first and apparatus for collecting condensed water 23；Wherein wastewater feed pipeline Jing waste water preheater 2 is connected with the waterwater entrance of evaporimeter 6，The steam (vapor) outlet at the top of evaporimeter 6 is connected with the entrance of the first effect vapour compression machine 8，The outlet of the first effect vapour compression machine 8 is connected with the heat source stream entrance of evaporimeter 6，Supplementary steam pipe line 29 is set in the outlet of the first effect vapour compression machine 8 and the heat source stream entrance connecting pipeline of evaporimeter 6，The condensation water outlet Jing pipelines of evaporimeter 6 are connected with apparatus for collecting condensed water 23，The concentrate floss hole Jing pipelines of the bottom of evaporimeter 6 are connected with the entrance of fouling device 13，The steam outlet at the top of fouling device 13 is connected with the entrance of the second effect vapour compression machine 15，The outlet of the second effect vapour compression machine 15 is connected with the heat source stream entrance of fouling device 13，Supplementary steam pipe line 30 is set in the outlet of the second effect vapour compression machine and the heat source stream entrance connecting pipeline of fouling device，The condensation water outlet Jing pipelines of fouling device 13 are connected with apparatus for collecting condensed water 23，The floss hole of apparatus for collecting condensed water 23 is connected with waste water preheater 2，The concentrate floss hole Jing pipelines of fouling device 13 are connected with the waterwater entrance of evaporimeter 6，The dirt floss hole of the bottom of fouling device 13 is by the outer carrying device of pipeline.
The present invention also provides a kind of processing method containing organic wastewater, and using said apparatus, methods described includes：
Using waste water preheater 2, it is used to process raw material waste water 1 and condensate 27, and raw material waste water 1 and condensate 27 are exchanged heat in waste water preheater 2, obtain after process it is preheated after raw material waste water 3 and condensation condensate 28；
Using evaporimeter 6, it is used to process come the mixture 5 of hang oneself the raw material waste water 3 of the preheating of waste water preheater 2 and the concentrate 4 of fouling device, and the 2nd stream 10 and condensate 24 of the 1st stream 7, liquid phase of gas phase are obtained after process；
Using the first effect vapour compression machine 8, it is used to process the 1st stream 7 of flash-pot 6, and the 3rd stream 9 of gas phase is obtained after process, and the 3rd stream 9 provides heat as heat source stream Returning evaporimeter 6 to evaporimeter 6, for the evaporation of water that gives up；
Using fouling device 13, it is used to process the 2nd stream 10 of flash-pot, 2nd stream 10 sends into fouling device 13 through fouling device liquid feeding pump 11, the 5th stream 4, dirt 17 and the condensate 22 of the 4th material 14, liquid phase of gas phase are obtained after process, material 5 enters evaporimeter 6 after the 5th stream 4 mixes with the raw material waste water 3 after preheating；
Using apparatus for collecting condensed water 23, it is used to receive the condensate 24 of flash-pot 6 and the condensate 22 from fouling device 13；
Using the second effect vapour compression machine 15, it is used to process the 4th stream 14 from fouling device 13, and the 4th stream 14 obtains the 6th stream 16 of gas phase after the second effect vapour compression machine 15 compresses, and the 6th stream 16 returns fouling device 13 as heat source stream.
In processing method of the present invention containing organic wastewater, raw material waste water 1 is preheated to close to saturation temperature in waste water preheater 2 with condensate 27, then the concentrate 4 discharged with fouling device 13 mixes, material 5 is entered in evaporimeter 6 after mixing, it is evaporated in evaporimeter 6, after the evaporated vapor 7 that obtains of evaporation is compressed by the first effect vapour compression machine 8, the latent heat of steam is improved, the compressed steam 9 for obtaining as evaporimeter 6 evaporation thermal source in Returning evaporimeter 6.Compressed steam is condensed into condensate 24 in evaporimeter 6, condensate 24 is entered in apparatus for collecting condensed water 23, the Jing pumps of concentrate 10 for obtaining of evaporimeter 6 are squeezed in fouling device 13, concentrate is evaporated again and fouling in fouling device 13, the steam 14 produced in fouling device 13 enters back into the second effect vapour compression machine 15 and compresses, the compressed steam 16 for obtaining is condensed into condensate 22 as the heating source in the chuck of fouling device 13 in jacket steam, and condensate 22 is entered in apparatus for collecting condensed water 23.The dirt Jing scraping blades of attachment are removed in the wall of fouling device 13, and the dirt 17 for obtaining is discharged by the dirt floss hole of fouling device 13, through being pumped to incinerator as fuel or going the device of other harmless treatments to carry out subsequent treatment.Concentrate 4 after fouling device 13 further concentration can be mixed into evaporimeter with the raw material waste water 3 after preheating.Obtain in apparatus for collecting condensed water 23 carry out flash-pot and the condensate of fouling device is pumped up into waste water preheater, and raw material wastewater heat exchange, realize heat recovery, condensate recoverable of lowering the temperature.
As shown in Figures 2 and 3, the falling film evaporator of lateral charging of the 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 device described in Fig. 1, using the device described in Fig. 2, organic wastewater used is the fine production waste water of propylene to the falling film evaporator, kelvin nitrogen content is 4050mg/L in the fine waste water of propylene, waste water boiling point is 100 DEG C, when waste water evaporates more than the moisture content of 85wt%, the easy fouling of concentrate, coking.Raw material wastewater treatment capacity is 15t/h, and normal temperature waste water is preheated to 99 DEG C through preheater 2, and the concentrate with 103 DEG C mixes, in evaporimeter 6.Raw material waste water is 3 with concentrate wastewater flow ratio:1～1.5.Evaporating temperature of the waste water in evaporimeter 6 is 100 DEG C, and the compression ratio of the first effect vapour compression machine 8 is 1.4.Evaporating temperature in fouling device 13 is 103 DEG C, and the compression ratio of the second effect vapour compression machine 15 is 1.5.2 scraping blades are set in fouling device 13, and scraping blade rotary speed is 360r/min, and dirt is by the continuous outer row of dirt pump 18.Condensate temperature Jing after heat recovery is 45 DEG C or so, and condensate-water polishing amount is 13t/h.
Claims (21)
1. a kind of processing meanss containing organic wastewater, the processing meanss include waste water preheater, evaporimeter, fouling device, the first effect vapour compression machine, the second effect vapour compression machine and apparatus for collecting condensed water；Wherein wastewater feed pipeline Jing waste water preheater is connected with the waterwater entrance of evaporimeter，Steam (vapor) outlet at the top of evaporimeter is connected with the entrance of the first effect vapour compression machine，The outlet of the first effect vapour compression machine is connected with the heat source stream entrance of evaporimeter，The condensation water outlet Jing pipelines of evaporimeter are connected with apparatus for collecting condensed water，The concentrate floss hole Jing pipelines of base of evaporator are connected with the entrance of fouling device，Steam outlet at the top of fouling device is connected with the entrance of the second effect vapour compression machine，The outlet of the second effect vapour compression machine is connected with the heat source stream entrance of fouling device，The condensation water outlet Jing pipelines of fouling device are connected with apparatus for collecting condensed water，The floss hole of apparatus for collecting condensed water is connected with waste water preheater，The concentrate floss hole Jing pipelines of fouling device are connected with the waterwater entrance of evaporimeter，The dirt floss hole of fouling device bottom is by the outer carrying device of pipeline.
2. according to the device described in claim 1, it is characterised in that：Supplementary steam pipe line is set in the outlet of the first effect vapour compression machine and the heat source stream entrance connecting pipeline of evaporimeter.
3. according to the device described in claim 1, it is characterised in that：Supplementary steam pipe line is set in the outlet of the second effect vapour compression machine and the heat source stream entrance connecting pipeline of fouling device.
4. according to the device described in claim 1, it is characterised in that：The waste water preheater is using any one in shell-and-tube heat exchanger, heat-pipe heat exchanger, plate type heat exchanger or lamella heat exchanger.
5. according to the device 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.
6. according to the device described in claim 5, 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.
7. according to the device described in claim 6, it is characterised in that：Described point of feed pipe is removably mounted in the lead channel.
8. according to the device described in claim 6, 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.
9. according to the device described in claim 8, it is characterised in that：The impingement baffle is provided with via.
10. according to the device described in claim 8, it is characterised in that：The height of the impingement baffle is 1/3～3/5 with the depth ratio of the lead channel.
11. according to the device described in claim 6, 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.
12. according to the device described in claim 6, it is characterised in that：The overflow baffle is cylinder, and section is in class inverted " L " font.
13. according to the device described in claim 1, it is characterised in that：Described fouling device is jacket type structure, heated by heat source stream in chuck, the heat source stream is that fouling device evaporates the steam for producing steam again Jing after mechanical compress, fouling device inner homogeneous arrange 2～6 scraping blades, the scraping blade is driven in fouling device internal rotating by motor, in process of production, scraping blade continuously rotates, and rotary speed is 200r/min～360r/min.
14. according to the device described in claim 1, it is characterised in that：Described the first effect vapour compression machine, the second effect vapour compression machine is using the one kind in centrifugal compressor, screw compressor, reciprocating compressor, centrifugal high pressure fan.
15. according to the device described in claim 1, it is characterised in that：It is 1.3～2.0, preferably 1.4～1.7 that described first imitates vapour compression machine, the compression ratio of the second effect vapour compression machine.
A kind of 16. processing methods containing organic wastewater, using arbitrary described device in claim 1-15, methods described includes：
Using waste water preheater, it is used to process raw material waste water and condensate, and raw material waste water and condensate are exchanged heat in waste water preheater, obtain it is preheated after raw material waste water and condensation condensate；
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 and the condensate of gas phase are obtained after process；
Using the first effect vapour compression machine, it is used to process the 1st stream of flash-pot, obtains the 3rd stream of gas phase, and the 3rd stream is used as heat source stream Returning evaporimeter；
Using fouling device, it is used to process the 2nd stream of flash-pot, and the 4th stream, the 5th stream of liquid phase, dirt and the condensate of gas phase are obtained after process, and the 5th stream enters evaporimeter after mixing with the raw material waste water after preheating；
Using apparatus for collecting condensed water, it is used to receive the condensate of the condensate of evaporimeter and fouling device；
Using the second effect vapour compression machine, it is used to process the 4th stream from fouling device, obtains the 6th stream of gas phase, and the 6th stream returns fouling device as heat source stream.
17. in accordance with the method for claim 16, it is characterised in that：Raw material waste water, by exchanging heat to 95 DEG C～102 DEG C with condensate, is then mixed in evaporimeter in waste water preheater with the concentrate of fouling device, and organic concentration is as unsaturated concentration with the mixed liquor for ensureing to be evaporated in evaporimeter.
18. in accordance with the method for claim 17, it is characterised in that：Raw material waste water is in waste water preheater by exchanging heat to 98 DEG C～100 DEG C with condensate.
19. in accordance with the method for 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, and the vaporization rate of waste water evaporation is 5%～50% in the evaporimeter.
20. in accordance with the method for claim 19, it is characterised in that：Logarithm heat transfer temperature difference in the evaporimeter between steam and waste water is 4 DEG C～8 DEG C, and the vaporization rate of waste water evaporation is 10%～40% in the evaporimeter.
21. in accordance with the method for claim 20, it is characterised in that：It is extremely higher than 1 DEG C～5 DEG C of boiling temperature that the operation temperature of the fouling device is the boiling temperature of concentration waste water, and operating pressure is normal pressure.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4154642A (en) * | 1976-02-05 | 1979-05-15 | Metallgesellschaft Aktiengesellschaft | Falling film evaporator |
| CN201762130U (en) * | 2010-08-25 | 2011-03-16 | 任松保 | Dual-effect steam recompression thermal mass recovery system |
| CN204138369U (en) * | 2014-08-26 | 2015-02-04 | 张大千 | A kind of luwa evaporator processing oil waste liquid |
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2015
- 2015-11-02 CN CN201510730155.5A patent/CN106630339B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4154642A (en) * | 1976-02-05 | 1979-05-15 | Metallgesellschaft Aktiengesellschaft | Falling film evaporator |
| CN201762130U (en) * | 2010-08-25 | 2011-03-16 | 任松保 | Dual-effect steam recompression thermal mass recovery system |
| CN204138369U (en) * | 2014-08-26 | 2015-02-04 | 张大千 | A kind of luwa evaporator processing oil waste liquid |
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