CN108069479A - A kind of wastewater treatment method and system - Google Patents
A kind of wastewater treatment method and system Download PDFInfo
- Publication number
- CN108069479A CN108069479A CN201610991369.2A CN201610991369A CN108069479A CN 108069479 A CN108069479 A CN 108069479A CN 201610991369 A CN201610991369 A CN 201610991369A CN 108069479 A CN108069479 A CN 108069479A
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- Prior art keywords
- waste water
- evaporator
- lead channel
- housing
- stripper
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/041—Treatment of water, waste water, or sewage by heating by distillation or evaporation by means of vapour compression
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/08—Thin film evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The present invention provides a kind of wastewater treatment method and system, and the system comprises waste water preheater, waste water heater, evaporator, stripper, vapour compression machine, heat exchanger, fixed gas compressor and apparatus for collecting condensed water.The present invention also provides a kind of wastewater treatment method using above system, wastewater treatment method of the present invention and system have many advantages, such as that safe and reliable, equipment is simple, operating cost is low, energy-saving effect is apparent, it can be achieved that 50%~95% water resource recycles.
Description
Technical field
The present invention relates to environmental protection and field of energy-saving technology, specifically concentration saliferous, pbz polymer is organic
The method and apparatus of object waste water.
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 side of high slat-containing wastewater
Method mainly has electroosmose process, hyperfiltration, ion-exchange and evaporation.Organic wastewater be mainly derived from chemical industry, road deicing,
The fields such as food processing further include dyeing waste water, oil exploitation and processing waste water, paper waste and pesticide industry waste water etc..It is high
The total amount of salt organic waste water is huge and increases year by year.If do not handled before discharge it, Coal Gas Washing Cycling Water can
Soluble inorganic salt and the toxic organic compound of difficult degradation can cause serious environmental pollution, and soil and surface water, underground water are caused
It destroys.Therefore, in today of water scarcity, effectively Technologies for Organic Wastewater Treatment with high salt is very necessary for research and development.
In recent years, foreign countries propose handles recycling waste water with function of mechanical steam recompression evaporation technique.Function of mechanical steam recompression
Technology is a Technolqgy for Energy Economizing reduced to extraneous energy demand.Its energy-saving principle is：It is secondary by what is generated in system
Steam passes through compressor compresses, its pressure and temperature is made to increase, enthalpy increase, instead of the external heat that must be used in original system
Source, and the latent heat of indirect steam is fully used, so as to achieve the purpose that technical process is energy saving.At present, mechanical vapour is again
Compressibility 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
The object of the present invention is to provide a kind of wastewater treatment method and system, wastewater treatment method of the present invention and it is
System has many advantages, such as that safe and reliable, equipment is simple, operating cost is low, energy-saving effect is apparent.
The present invention provides a kind of waste water treatment system, the waste water treatment system includes waste water preheater, waste water heats
Device, evaporator, stripper, vapour compression machine, heat exchanger, fixed gas compressor and apparatus for collecting condensed water；Wherein wastewater feed pipe
Line is connected through the waterwater entrance of waste water preheater and waste water heater, and the wastewater outlet of waste water heater and the waste water of evaporator enter
Mouth connection, the gas vent of waste water heater are connected through fixed gas compressor with the fixed gas entrance of heat exchanger, the steaming of evaporator
Vapor outlet is connected with the entrance of vapour compression machine, and the outlet of vapour compression machine and the heat source stream entrance of evaporator connect, evaporation
The condensation water out of device and the condensation water inlet of heat exchanger connect, and the concentrate floss hole of base of evaporator is through pipeline and stripper
Waterwater entrance connection, heat exchanger fixed gas outlet be connected with the gas phase entrance of stripper, the gaseous phase outlet of stripper and give up
The heat source gas entrance connection of water heater, the concentrate floss hole of stripper bottom are connected with waste water preheater through pipeline, change
The condensation water of the condensation water out of hot device and the condensation water outlet of waste water heater respectively through pipeline and apparatus for collecting condensed water enters
Mouth connection, the floss hole of apparatus for collecting condensed water are connected with waste water preheater.
In waste water treatment system of the present invention, the steam (vapor) outlet of the evaporator and the entrance connecting tube of vapour compression machine
On line steam is set to make up line.
In waste water treatment system of the present invention, the gas vent of the waste water heater and the entrance of fixed gas compressor
In connecting pipeline fixed gas is set to make up line.
In waste water treatment system of the present invention, the fixed gas compressor can be displacement type compressor, turbine type
Compressor or heating power type compressor.
In waste water treatment system of the present invention, shell-and-tube heat exchanger, heat may be employed in the waste water preheater, heat exchanger
Pipe heat exchanger, plate heat exchanger or lamella heat exchanger, it is preferred to use plate heat exchanger.
In waste water treatment system of the present invention, shell-and-tube heat exchanger may be employed in the waste water heater or shell-and-plate changes
Hot device, it is preferred to use lamella heat exchanger.The waste water heater sets gas-water separation bag, realize in heater condensed water with not
Separation between solidifying gas.
In waste water treatment system of the present invention, packed tower and spray column, preferably spray column can be used in the stripper.
In waste water treatment system of the present invention, climbing film evaporator, falling film evaporator, level can be used in the evaporator
Any one of pipe evaporator and plate-type evaporator.
In waste water treatment system of the present invention, the evaporator uses falling film evaporator, the falling film evaporator bag
It includes：Housing, tube sheet, evaporation tube, fluid Supplying apparatus, the tube sheet are arranged on the top of the housing；The evaporation tube is more
A, multiple evaporation tubes are vertically arranged in the housing, and the upper end of the evaporation tube passes through the tube sheet；The evaporation
The upper end of pipe is equipped with guiding device；The fluid Supplying apparatus includes lead channel and divides feed pipe, and the lead channel is vertically arranged
On the outer wall top of the housing, and around the entire housing, the lead channel is uniformly provided with multiple points of feed inlets, described point
Feed inlet is arranged on the upper side wall of the lead channel, and the lower end for dividing feed pipe passes vertically through that described that feed inlet is divided to stretch into is described
In lead channel, and the lower end for dividing feed pipe is close to the bottom of the lead channel；The housing is equipped with the multiple and feed liquor
The overflow ducts of slot connection.
Wherein, it is described that feed pipe is divided to be removably mounted in the lead channel.
Wherein, multiple impingement baffles are equipped in the lead channel, multiple impingement baffles are evenly arranged in the lead channel
Bottom.
Wherein, the impingement baffle is equipped with via hole.
Wherein, the depth ratio of the height of the impingement baffle and the lead channel is 1/3~3/5.
Wherein, the inner wall of the housing is set there are one overflow baffle, and the overflow baffle is fixed on the inner wall of the housing,
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 system of the present invention, centrifugal compressor, screw may be employed in the vapour compression machine
Compressor, reciprocating compressor and centrifugal high pressure fan；The selection of compression ratio one 1.3~2.0, preferably 1.4 of the compressor
~1.7.
The present invention also provides a kind of wastewater treatment methods, and using above-mentioned waste water treatment system, the technique is included in following
Hold：
Using waste water preheater, be used to handling raw material waste water, condensation water and stripper concentrate, raw material waste water, condensation water and
Stripper concentrate exchanges heat in waste water preheater, obtain it is preheated after raw material waste water, cooling condensation water and cooling
Concentrate；
Using waste water heater, the raw material waste water and the stripping gas of stripper overhead being used for after processing preheating, the original after preheating
The stripping gas of material waste water and stripper overhead exchanges heat in waste water heater, raw material waste water, condensation water after being heated
And fixed gas；
Using evaporator, the raw material waste water after the waste water heater heating that is used to handling hanging oneself obtains the 1st of gas phase after processing
Stream, the 2nd stream of liquid phase and condensation water；
Using vapour compression machine, the 1st stream that processing carrys out the gas phase of flash-pot is used for, the 3rd material of gas phase is obtained after processing
Stream, heat source stream Returning evaporimeter of the 3rd stream as evaporator；
Using fixed gas compressor, it is used to handle the fixed gas from waste water heater, obtains the 4th stream of gas phase；
Using heat exchanger, the 4th stream that processing comes the condensation water of flash-pot and the gas phase from fixed gas compressor is used for,
The 5th stream and condensation water of the gas phase obtained after processing；
Using stripper, it is used to handle and comes the 2nd stream of flash-pot and the 5th stream of heat exchanger, stripped after processing
Column overhead gas and stripper concentrate, the stripper overhead gas enter waste water heater as heat source stream；
Using apparatus for collecting condensed water, it is used to receive the condensation water from waste water heater and the condensation water from heat exchanger.
In processing method of the present invention, raw material waste water is in waste water preheater by exchanging heat with condensation water, stripper concentrate
To close to after saturation temperature, reach saturation temperature into waste water heater and the heat exchange of stripper stripping gas and enter in evaporator,
It is evaporated in evaporator, after vapour compression machine compresses, latent heat of the steam improves obtained steam, then is made with compressed steam
For the heat source of evaporator, the concentrate of base of evaporator, which enters, carries out stripping evaporation in stripper, is made with the fixed gas after heating
Enter stripping in stripper for carrier gas and be concentrated by evaporation waste water, the mass-and heat-transfer effect that fixed gas improves stripper is introduced in stripper
Rate can effectively avoid fouling and clogging of the waste water in stripper.The fixed gas that the steam of evaporation is stripped in stripper and is introduced mixes
It closes into waste water heater, as the heat source of waste water heater, steam is condensed into condensation water, and fixed gas is by heater
Fixed gas outlet be compressed into fixed gas compressor, compressed fixed gas is heated to be recycled into stripper.Vapour
The concentrate of stripper bottom enters carries out heat exchange recycling heat with waste water in waste water preheater.
In processing method of the present invention, raw material waste water is in waste water preheater by exchanging heat with condensation water, stripper concentrate
Into in waste water heater after to 80 DEG C~98 DEG C, preferably 85 DEG C~95 DEG C, then in waste water heater with stripper overhead
Stripping gas exchange heat to after 85 DEG C~100 DEG C, preferably 90 DEG C~100 DEG C into evaporator.
In processing method of the present invention, the logarithm heat transfer temperature difference in the evaporator between steam and waste water is 3 DEG C~10 DEG C,
It is preferred that 4 DEG C~8 DEG C, meanwhile, the vaporization rate that waste water evaporates in the evaporator is 5%~50%, preferably 10%~40%.
In processing method of the present invention, fixed gas in heat exchanger with exchanging heat through the compressed steam of vapour compression machine,
Fixed gas temperature after heat exchange is 110 DEG C~115 DEG C.
In processing method of the present invention, the fixed gas can be any one of air, nitrogen, oxygen or several.
In processing method of the present invention, when system goes into operation, it is necessary to go into operation heat source by the use of the steam in the system external world as system, institute
Stating steam can be made up line in introducing system by steam；If the steam that system generates in the process of running cannot maintain system hot
During amount consumption quantity of steam, it can be made up line by steam and introduce steam；If the steam that system generates in the process of running is more than dimension
When holding system thermal consumption quantity of steam, extra steam can be by supplement steam pipe line discharge system.
In processing method of the present invention, do not coagulated when device goes into operation, it is necessary to make up line to introduce into stripper from fixed gas
Gas.
In processing method of the present invention, climbing film evaporator, falling film evaporator, horizontal tube evaporator can be used in the evaporator
Any one of with plate-type evaporator.
In processing method of the present invention, the 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 shell
In body, and the upper end of the evaporation tube passes through the tube sheet；The upper end of the evaporation tube is equipped with guiding device；The liquid supply
Device includes lead channel and divides feed pipe, and the lead channel is vertically arranged in the outer wall top of the housing, and around entire institute
Housing is stated, the lead channel is uniformly provided with multiple points of feed inlets, the upper side wall that feed inlet is divided to be arranged on the lead channel, institute
State point feed pipe lower end pass vertically through it is described feed inlet is divided to stretch into the lead channel, and it is described divide feed pipe lower end it is close
The bottom of the lead channel；The housing is equipped with multiple overflow ducts connected with the lead channel.
Wherein, it is described that feed pipe is divided to be removably mounted in the lead channel.
Wherein, multiple impingement baffles are equipped in the lead channel, multiple impingement baffles are evenly arranged in the lead channel
Bottom.
Wherein, the impingement baffle is equipped with via hole.
Wherein, the depth ratio of the height of the impingement baffle and the lead channel is 1/3~3/5.
Wherein, the inner wall of the housing is set there are one overflow baffle, and the overflow baffle is fixed on the inner wall of the housing,
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 processing method of the present invention, such as the heat exchange of water pump, heat, condensate water collecting are this professional technique people
Content known to member.
Compared with prior art, wastewater treatment method of the present invention has the following advantages that with system：
1st, in wastewater treatment method of the present invention, waste water is concentrated by evaporation recycling using steam mechanical recompression and fixed gas stripping combination
Technique is, it can be achieved that 50%~95% water resource recycles.By controlling cocnentration factor of the waste water in evaporator, waste water is avoided to exist
Fouling occurs in evaporator, concentrate is made further to be concentrated in stripper.
2nd, by introducing compression fixed gas, the heat needed in stripper into stripper in wastewater treatment method of the present invention
It is brought by fixed gas in tower so that fixed gas and waste water direct heat transfer improve system thermal efficiency, efficiently avoid evaporation knot
The problem of dirt blocks.
3rd, heat exchanger is provided in wastewater treatment method of the present invention, the excessive latent heat for realizing compressed steam passes through heat exchange
To fixed gas, heat is directly entered in waste water, improves the utilization ratio of vapor compression heat energy.
4th, in wastewater treatment method of the present invention and system, by using with the falling film evaporator laterally fed, structure letter
It is single compact, effectively reduce the height of equipment；Liquid flow flux is big, operates, is easy to maintain；Use the equipment liquid distribution rate
Height, cloth film are uniform, are not easy to plug, are readily cleaned, and can increase the arrangement quantity of evaporation tube, increase the heat exchange area of evaporator.
Description of the drawings
Fig. 1 is wastewater treatment method of the present invention and system schematic.
Fig. 2 is the half-sectional structure front view of falling film evaporator used in the present invention.
Fig. 3 is the top view that the part of falling film evaporator used in the present invention is cutd open.
Fig. 4 is the impingement baffle schematic diagram of falling film evaporator used in the present invention.
Specific embodiment
The concrete condition further illustrated the present invention below by specific embodiment, but it is not limited to following embodiments.
As shown in Figure 1, the present invention provides a kind of waste water treatment system, the waste water treatment system includes waste water preheater
2nd, waste water heater 4, evaporator 5, stripper 11, vapour compression machine 8, heat exchanger 15, fixed gas compressor 14 and condensation water are received
Storage 20；
Wherein wastewater feed pipeline is connected through waste water preheater 2 with the waterwater entrance of waste water heater 4, and waste water heater 4 gives up
Water out is connected with the waterwater entrance of evaporator 5, and the gas vent of waste water heater 4 is through fixed gas compressor 14 and heat exchanger 15
Fixed gas entrance be connected, the gas vent of the waste water heater 4 in the entrance connecting pipeline of fixed gas compressor 14 with setting
It puts fixed gas and makes up line 23, the steam (vapor) outlet of evaporator 5 is connected with the entrance of vapour compression machine 8, the steam of the evaporator 5
Outlet makes up line 7 with setting steam in the entrance connecting pipeline of vapour compression machine 8, outlet and the evaporator 5 of vapour compression machine 8
The connection of heat source stream entrance, the condensation water out of evaporator 5 is connected with the condensation water inlet of heat exchanger 15,5 bottom of evaporator
Concentrate floss hole be connected through pipeline with the waterwater entrance of stripper 11, the outlet of the fixed gas of heat exchanger 15 and stripper 11
Gas phase entrance connects, and the gaseous phase outlet of stripper 11 is connected with the heat source gas entrance of waste water heater 4,11 bottom of stripper
Concentrate floss hole is connected through pipeline with waste water preheater 2, the condensation water out of heat exchanger 15 and the condensation water of waste water heater 4
Floss hole is connected respectively through pipeline with the condensation water inlet of apparatus for collecting condensed water 20, the floss hole and waste water of apparatus for collecting condensed water 20
Preheater 2 connects.
The present invention also provides a kind of wastewater treatment methods, and using above system, the technique includes：
Using waste water preheater 2, it is used to receive and process raw material waste water 1, condensation water 21 and stripper concentrate 18, raw material gives up
Water 1, condensation water 21 and stripper concentrate 18 exchange heat in waste water preheater 2, and the raw material after being preheated after processing gives up
The concentrate 19 of water 3, the condensation water 22 of cooling and cooling；
Using waste water heater 4, it is used to handle the raw material waste water 3 after preheating and the stripping gas 12 from stripper overhead, in advance
Raw material waste water 3 and stripping gas 12 after heat exchange heat in waste water heater 4, raw material waste water 26, condensation after being heated
Water 24 and fixed gas 13；
Using evaporator 5, the raw material waste water 26 after the waste water heater heating that is used to handling hanging oneself obtains gas phase after processing
1st stream 6, the 2nd stream 10 of liquid phase and condensation water 16；
Using vapour compression machine 8, it is used to handle the 1st stream 6 of the gas phase for carrying out flash-pot, the 3rd of gas phase is obtained after processing
Stream 9；
It using fixed gas compressor 14, is used to handle the fixed gas 13 from waste water heater 4, the of gas phase is obtained after processing
4 streams 27；
Using heat exchanger 15, it is used to handle the 4th of the condensation water 16 for carrying out flash-pot and the gas phase from fixed gas compressor
Stream 27, the 5th stream 25 and condensation water 17 of the gas phase obtained after processing；
Using stripper 11, it is used to handle and comes the 2nd stream 10 of flash-pot and the 5th stream 25 of heat exchanger, after processing
To stripper overhead gas 12 and stripper concentrate 18, the stripping gas 12 of the stripper overhead enters waste water as heat source and adds
Hot device 4；
Using apparatus for collecting condensed water 20, it is used to receive the condensation water 24 from waste water heater 4 and the condensation from heat exchanger
Water 17.
In the method for the present invention, raw material waste water 1 is in waste water preheater 2 by being changed with condensation water 21, stripper concentrate 18
Heat is to close to after saturation temperature, then reaches saturation temperature with the heat exchange of stripper stripping gas 12 and enter in evaporator 5, in evaporator
Be evaporated in 5, obtained steam through vapour compression machine 8 compression after, latent heat of the steam improve, then with compressed steam respectively as
The heat source of evaporator 5, the concentrate of 5 bottom of evaporator, which enters, carries out stripping evaporation in stripper 11, with the fixed gas after heating
Enter stripping in stripper 11 as carrier gas and be concentrated by evaporation waste water, the biography that fixed gas improves stripper 11 is introduced in stripper 11
Matter heat transfer efficiency can effectively avoid fouling and clogging of the waste water in stripper 11.The steam of evaporation is stripped in stripper 11 and is drawn
The fixed gas entered is mixed into waste water heater 4, and as the heat source of waste water heater 4, steam is condensed into condensation
Water, fixed gas are exported into fixed gas compressor 14 by the fixed gas of heater 4 and are compressed, and compressed fixed gas is heated
It is recycled into stripper 11.The concentrate of 11 bottom of stripper enters carries out heat exchange recycling heat with waste water in waste water preheater 2
Amount.
As shown in Fig. 2,3 and 4, the falling film evaporator laterally fed of the invention, including：Housing 11, tube sheet 1, evaporation tube
3rd, fluid Supplying apparatus 20.Housing 11 is cylindrical shape, and tube sheet 1 is arranged on the top of housing 11, and 1 upper surface of tube sheet is pushed up with housing 11
The part at end forms cloth film room.Evaporation tube 3 is multiple, and multiple evaporation tubes 3 are vertically arranged in housing 11, and preferably evaporation tube is uniform
Arrangement.The upper end of evaporation tube 3 passes through tube sheet 1, sets multiple evaporation pores on tube sheet 1, and the upper end of evaporation tube 3 is from evaporation pore
Middle stretching, and using welding or the methods of connecing of rising is tightly connected with tube sheet 1.Guiding device 2 is equipped in the upper end of evaporation tube 3.Liquid
Body feeding 20 includes lead channel 6 and multiple points of feed pipes 7, in the present embodiment, lead channel 6 for an interior side opening annular
Enclosure slot, the internal diameter of toroidal shell slot is identical with the outer diameter of housing 11, and lead channel 6 is vertically arranged in the outer of housing 11 by welding
Wall top, and around entire housing 11, the one side that lead channel 6 is open is using the lateral wall of housing 11 as shared side wall.Feed liquor
Slot 6 is uniformly provided with multiple points of feed inlets 13, and the quantity for dividing feed inlet 13 is identical with dividing feed pipe 7, divides feed pipe 7 for installing,
Specific to the present embodiment, the quantity for dividing feed inlet is 8.Feed inlet 13 is divided to be arranged on the upper side wall of lead channel 6, divides feed pipe 7
Lower end pass vertically through point feed inlet 13 and stretch into lead channel 6, and the lower end of feed pipe 7 is divided to export close to the bottom of lead channel 6.
Feed pipe 7 is divided to be used to connect with charging manifold 10, material is provided into feed well 6 by dividing feed pipe 7 from charging manifold 10.Shell
Body 11 is equipped with multiple overflow ducts 5 connected with lead channel 6, and overflow ducts 5 are the crest of weir close to 6 upper side wall of lead channel, are commonly used
Structure have rectangular weir, V-type weir and round bottom rectangular weir.
Further, feed pipe 7 is divided to be removably mounted on by flange in lead channel 6.Specifically, divide feed pipe 7
One ring flange 71 of lateral wall welded and installed, ring flange 71 and the upper side wall of lead channel 6 are linked together by bolt assembly, can
To be dismantled as needed.
Further, multiple impingement baffles 8 are equipped in 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, the upper edge of impingement baffle 8, which is higher than, divides the lower end of feed pipe 7 to export.Ginseng
According to shown in Fig. 4, impingement baffle 8 is equipped with via hole 81, and the section of via hole 81 is preferably circular, 5-30 millimeters a diameter of, excellent
Select 10-20 millimeters.Preferably, the depth ratio of the height of impingement baffle 8 and lead channel 6 is 1/3~3/5, such as the height of impingement baffle 8
1/3,3/7,1/2 and 3/5 for feed liquor groove depth 6.
Further, the inner wall of housing 11 is set there are one overflow baffle 4, and overflow baffle 4 is cylinder, and overflow baffle 4
Outer diameter is less than the internal diameter of housing 11.Overflow baffle 4 is fixed on the inner wall of housing 11, and overflow by multiple rectangle support plates 12
The lower edge of baffle 4 is higher than the upper surface of tube sheet 1, and overflow baffle 4 forms cloth liquid passage with 11 inner wall of housing and tube sheet 1.Cloth liquid leads to
The cross-sectional width in road is less than the minimum range of 11 inner wall of housing and evaporation tube 3.
Embodiment 1
Using the system described in Fig. 1, the evaporator is using the device described in Fig. 2, and waste water used is FCC desulfurization wastewaters, waste water
In mainly containing sodium sulfite, sodium sulphate and polcarb, raw material waste water salt concentration is 6wt%, and raw material wastewater treatment capacity is 30t/
H, room temperature waste water is preheated by preheater 2, heater 4 is heated to 100 DEG C, into evaporator 5.The compression of vapour compression machine 8
Than for 1.4, employing nitrogen as to supplement fixed gas.The concentrate 10 of 5 bottom of evaporator discharge is 16wt%, which passes through
After the stripping of stripper 11 is concentrated by evaporation, the concentrate 17 of discharge is 24wt%.The temperature after heat recovery of condensation water 21 is 45 DEG C of left sides
The right side, condensate-water polishing amount are 16.6 t/h.
Claims (32)
1. a kind of waste water treatment system, the waste water treatment system includes waste water preheater, waste water heater, evaporator, stripping
Tower, vapour compression machine, heat exchanger, fixed gas compressor and apparatus for collecting condensed water；Wherein wastewater feed pipeline is through waste water preheater
It is connected with the waterwater entrance of waste water heater, the wastewater outlet of waste water heater and the waterwater entrance of evaporator connect, and waste water adds
The gas vent of hot device is connected through fixed gas compressor with the fixed gas entrance of heat exchanger, the steam (vapor) outlet and vapour pressure of evaporator
The entrance of contracting machine is connected, and the outlet of vapour compression machine and the heat source stream entrance of evaporator connect, the condensation water out of evaporator
It is connected with the condensation water inlet of heat exchanger, the concentrate floss hole of base of evaporator connects through the waterwater entrance of pipeline and stripper
It connects, the fixed gas outlet of heat exchanger is connected with the gas phase entrance of stripper, the gaseous phase outlet of stripper and the heat of waste water heater
Source gas access connects, and the concentrate floss hole of stripper bottom is connected through pipeline with waste water preheater, the condensation water of heat exchanger
The condensation water outlet of outlet and waste water heater connects respectively through the condensation water inlet of pipeline and apparatus for collecting condensed water, condensation water
The floss hole of collector is connected with waste water preheater.
2. according to waste water treatment system described in claim 1, it is characterised in that：The steam (vapor) outlet and both vapor compression of the evaporator
In the entrance connecting pipeline of machine steam is set to make up line.
3. according to waste water treatment system described in claim 1, it is characterised in that：The gas vent of the waste water heater is not with coagulating
In the entrance connecting pipeline of air compressor fixed gas is set to make up line.
4. according to waste water treatment system described in claim 1, it is characterised in that：The fixed gas compressor compresses for displacement type
Machine, turbo type compressor or heating power type compressor.
5. according to waste water treatment system described in claim 1, it is characterised in that：The waste water preheater, heat exchanger use shell
Formula heat exchanger, heat-pipe heat exchanger, plate heat exchanger or lamella heat exchanger, it is preferred to use plate heat exchanger.
6. according to waste water treatment system described in claim 1, it is characterised in that：The waste water heater may be employed shell-and-tube and change
Hot device or lamella heat exchanger, it is preferred to use lamella heat exchanger.
7. according to waste water treatment system described in claim 1, it is characterised in that：The stripper uses packed tower and spray
Tower, preferably spray column.
8. according to waste water treatment system described in claim 1, it is characterised in that：The evaporator is using climbing film evaporator, drop
Any one of film evaporator, horizontal tube evaporator and plate-type evaporator.
9. according to the system described in claim 8, it is characterised in that：The falling film evaporator includes：Housing, tube sheet, evaporation
Pipe, fluid Supplying apparatus, the tube sheet are arranged on the top of the housing；The evaporation tube is multiple, multiple evaporation tubes
It is 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 equipped with water conservancy diversion
Device；The fluid Supplying apparatus includes lead channel and divides feed pipe, and the lead channel is vertically arranged in the outer wall of the housing
Top, and around the entire housing, the lead channel are uniformly provided with multiple points of feed inlets, and described that feed inlet is divided to be arranged on is described
The upper side wall of lead channel, the lower end for dividing feed pipe pass vertically through it is described feed inlet is divided to stretch into the lead channel, it is and described
Divide the lower end of feed pipe close to the bottom of the lead channel；The housing leads to equipped with multiple overflows connected with the lead channel
Road.
10. according to the system described in claim 9, it is characterised in that：Described point of feed pipe is removably mounted on the feed liquor
On slot.
11. according to the system described in claim 9, it is characterised in that：Multiple impingement baffles are equipped in the lead channel, it is multiple described
Impingement baffle is evenly arranged in the bottom of the lead channel.
12. according to the system described in claim 11, it is characterised in that：The impingement baffle is equipped with via hole.
13. according to the system described in claim 12, it is characterised in that：The depth of the height of the impingement baffle and the lead channel
Than for 1/3~3/5.
14. according to the system described in claim 9, it is characterised in that：The inner wall of the housing is set there are one overflow baffle, described
Overflow baffle is fixed on the inner wall of the housing, and the overflow baffle forms cloth liquid passage with the inner walls and tube sheet.
15. system according to claim 14, it is characterised in that：The overflow baffle is cylinder, and section is in class inverted " L "
Font.
16. according to the system described in claim 9, it is characterised in that：The evaporation tube is evenly arranged in the housing.
17. according to the system described in claim 9, it is characterised in that：The vapour compression machine is using centrifugal compressor, spiral shell
Rod-type compressor, reciprocating compressor and centrifugal high pressure fan；The compression ratio selection 1.3~2.0 of the compressor, preferably
1.4~1.7.
18. a kind of wastewater treatment method, using waste water treatment system described in any claim, the work in claim 1-17
Skill includes following content：
Using waste water preheater, be used to handling raw material waste water, condensation water and stripper concentrate, raw material waste water, condensation water and
Stripper concentrate exchanges heat in waste water preheater, obtain it is preheated after raw material waste water, cooling condensation water and cooling
Concentrate；
Using waste water heater, the raw material waste water and the stripping gas of stripper overhead being used for after processing preheating, the original after preheating
The stripping gas of material waste water and stripper overhead exchanges heat in waste water heater, raw material waste water, condensation water after being heated
And fixed gas；
Using evaporator, the raw material waste water after the waste water heater heating that is used to handling hanging oneself obtains the 1st of gas phase after processing
Stream, the 2nd stream of liquid phase and condensation water；
Using vapour compression machine, the 1st stream that processing carrys out the gas phase of flash-pot is used for, the 3rd material of gas phase is obtained after processing
Stream, heat source stream Returning evaporimeter of the 3rd stream as evaporator；
Using fixed gas compressor, it is used to handle the fixed gas from waste water heater, obtains the 4th stream of gas phase；
Using heat exchanger, the 4th stream that processing comes the condensation water of flash-pot and the gas phase from fixed gas compressor is used for,
The 5th stream and condensation water of the gas phase obtained after processing；
Using stripper, it is used to handle and comes the 2nd stream of flash-pot and the 5th stream of heat exchanger, stripped after processing
Column overhead gas and stripper concentrate, the stripper overhead gas enter waste water heater as heat source stream；
Using apparatus for collecting condensed water, it is used to receive the condensation water from waste water heater and the condensation water from heat exchanger.
19. according to the processing method described in claim 18, it is characterised in that：Raw material waste water is in waste water preheater by with coagulating
It bears water, stripper concentrate exchanges heat to after 80 DEG C~98 DEG C, preferably 85 DEG C~95 DEG C and adds into waste water heater, then in waste water
Exchange heat in hot device with the stripping gas of stripper overhead to after 85 DEG C~100 DEG C, preferably 90 DEG C~100 DEG C into evaporator.
20. according to the processing method described in claim 18, it is characterised in that：Pair in the evaporator between steam and waste water
Number heat transfer temperature differences are 3 DEG C~10 DEG C, preferably 4 DEG C~8 DEG C, meanwhile, the vaporization rate that waste water evaporates in the evaporator for 5%~
50%, preferably 10%~40%.
21. according to the processing method described in claim 18, it is characterised in that：Fixed gas in heat exchanger with through vapour compression machine
Compressed steam exchanges heat, and the fixed gas temperature after heat exchange is 110 DEG C~115 DEG C.
22. according to the processing method described in claim 18, it is characterised in that：The fixed gas can be air, nitrogen, oxygen
Gas, any one of or it is several.
23. according to the processing method described in claim 18, it is characterised in that：The evaporator can be used climbing film evaporator,
Any one of falling film evaporator, horizontal tube evaporator and plate-type evaporator.
24. according to the processing method described in claim 23, it is characterised in that：The falling film evaporator includes：Housing, pipe
Plate, evaporation tube, fluid Supplying apparatus, the tube sheet are arranged on the top of the housing；The evaporation tube is multiple described to be multiple
Evaporation tube is 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 set
There is guiding device；The fluid Supplying apparatus includes lead channel and divides feed pipe, and the lead channel is vertically arranged in the housing
Outer wall top, and around the entire housing, the lead channel is uniformly provided with multiple points of feed inlets, described that feed inlet is divided to set
In the upper side wall of the lead channel, the lower end for dividing feed pipe pass vertically through it is described feed inlet is divided to stretch into the lead channel,
And the lower end for dividing feed pipe is close to the bottom of the lead channel；The housing be equipped with it is multiple connected with the lead channel it is excessive
Circulation road.
25. according to the processing method described in claim 24, it is characterised in that：Described point of feed pipe is removably mounted on described
In lead channel.
26. according to the processing method described in claim 25, it is characterised in that：Multiple impingement baffles are equipped in the lead channel, it is more
A impingement baffle is evenly arranged in the bottom of the lead channel.
27. according to the processing method described in claim 26, it is characterised in that：The impingement baffle is equipped with via hole.
28. according to the processing method described in claim 26, it is characterised in that：The height of the impingement baffle and the lead channel
Depth ratio is 1/3~3/5.
29. according to the processing method described in claim 24, it is characterised in that：The inner wall of the housing set there are one overflow keep off
Plate, the overflow baffle are fixed on the inner wall of the housing, and the overflow baffle forms cloth liquid with the inner walls and tube sheet
Passage.
30. according to the processing method described in claim 29, it is characterised in that：The overflow baffle is cylinder, and section is in class
Inverted " L " font.
31. according to the processing method described in claim 24, it is characterised in that：The evaporation tube is evenly arranged in the housing
In.
32. according to the processing method described in claim 24, it is characterised in that：The vapour compression machine uses centrifugal compressor
Machine, screw compressor, reciprocating compressor and centrifugal high pressure fan；The compression ratio 1.3~2.0 of the compressor, preferably
1.4~1.7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610991369.2A CN108069479B (en) | 2016-11-11 | 2016-11-11 | Wastewater treatment method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610991369.2A CN108069479B (en) | 2016-11-11 | 2016-11-11 | Wastewater treatment method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108069479A true CN108069479A (en) | 2018-05-25 |
| CN108069479B CN108069479B (en) | 2020-01-10 |
Family
ID=62153439
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610991369.2A Active CN108069479B (en) | 2016-11-11 | 2016-11-11 | Wastewater treatment method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108640392A (en) * | 2018-06-07 | 2018-10-12 | 聊城煤武新材料科技有限公司 | A kind of water-oil separating treatment process |
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| CN203613059U (en) * | 2013-10-15 | 2014-05-28 | 中国石油化工股份有限公司 | Multiple-effect evaporation treatment device for alkali-contained waste water with high COD (chemical oxygen demand) |
| CN204522328U (en) * | 2015-03-23 | 2015-08-05 | 河北乐恒化工设备制造有限公司 | Three grades with function of mechanical steam recompression continuous falling liquid film circulating and evaporating concentration systems |
| CN104986816A (en) * | 2015-02-16 | 2015-10-21 | 吴大川 | Process and apparatus for carrying out wastewater desorption and falling film evaporation on coking sewage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH1176761A (en) * | 1997-09-05 | 1999-03-23 | Jgc Corp | Treatment of ammonia-containing waste water |
| CN101811743A (en) * | 2010-04-09 | 2010-08-25 | 兰州节能环保工程有限责任公司 | Circulation evaporator |
| CN203613059U (en) * | 2013-10-15 | 2014-05-28 | 中国石油化工股份有限公司 | Multiple-effect evaporation treatment device for alkali-contained waste water with high COD (chemical oxygen demand) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108640392A (en) * | 2018-06-07 | 2018-10-12 | 聊城煤武新材料科技有限公司 | A kind of water-oil separating treatment process |
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|---|---|
| CN108069479B (en) | 2020-01-10 |
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