CN106809896B - A kind of organic wastewater treating system and method - Google Patents
A kind of organic wastewater treating system and method Download PDFInfo
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- CN106809896B CN106809896B CN201710089371.5A CN201710089371A CN106809896B CN 106809896 B CN106809896 B CN 106809896B CN 201710089371 A CN201710089371 A CN 201710089371A CN 106809896 B CN106809896 B CN 106809896B
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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Abstract
The invention discloses a kind of organic wastewater treating systems, comprising: heater；Evaporator, the evaporator are connected to setting with the heater；First vapour compression machine, first vapour compression machine are connected to setting with the evaporator by the first steam outlet pipe, and first vapour compression machine is connected to setting with the heater by the first steam inlet tube；Organic matter stripping tower, the organic matter stripping tower are connected to setting with the first condensate liquid collecting tank；Second vapour compression machine, second vapour compression machine are connected to setting with the organic matter stripping tower by the second steam outlet pipe；Reboiler, the reboiler are connected to setting with the organic matter stripping tower, and the reboiler is connected to setting with second vapour compression machine by the second steam inlet tube.The present invention reduces the demands of external steam, improve capacity usage ratio and economic benefit.The demand for reducing additional cycles cooling water, has saved water resource, reduces treatment of Organic Wastewater cost.
Description
Technical field
The invention belongs to technical field of waste water processing, and in particular to a kind of organic wastewater treating system and method.
Background technique
With industrial boom, the type and quantity of waste water rapidly increase, also increasingly extensively and tight to the pollution of water body
Weight, threatens the health and safety of the mankind.Since the ingredient of industrial wastewater is more complicated, some are also toxic, Industrial Wastewater Treatment ratio
Municipal sewage treatment is more difficult also more important.Especially in the synthesis such as chemical industry, pesticide, medicine or fermented product process units,
Due to chemically reacting the complexity with biochemical reaction, often with a large amount of high concentrated organic wastewaters of generation.
High concentrated organic wastewater mainly has the characteristics that organic concentration height, complicated component.COD in high concentrated organic wastewater
Generally in 2 000mg/L or more, some is even as high as tens of thousands of or even hundreds of thousands mg/L, and in contrast, BOD is lower, many waste water
The ratio of BOD and COD is less than 0.3.Not only also contain light organic matter containing weight organic matter in high concentrated organic wastewater.Therefore, exist
Before process units is discharged in high concentrated organic wastewater, it is necessary to be pre-processed.
The prior art has the following deficiencies: (one) in treatment of Organic Wastewater process when handling high concentrated organic wastewater
In, it needs to consume a large amount of external steam, reduces capacity usage ratio and economic benefit.(2) in treatment of Organic Wastewater process
In, it needs to consume a large amount of additional recirculated cooling waters, will lead to the waste of water resource, increase treatment of Organic Wastewater cost.
(3) organic waste water treating device is complicated, not only increases equipment making cost, reduces economic benefit, there is also organic wastewaters
The low problem for the treatment of effeciency.
Summary of the invention
The object of the present invention is to provide a kind of organic wastewater treating system and methods.It efficiently solves and needs to consume
The problem of a large amount of external steam, reduction capacity usage ratio and economic benefit；It is a large amount of additional to efficiently solve needs consumption
The problem of recirculated cooling water will lead to the waste of water resource, increase treatment of Organic Wastewater cost.
To achieve the goals above, The technical solution adopted by the invention is as follows:
A kind of organic wastewater treating system provided by the invention, comprising: heater, for organic wastewater to be processed and following
The mixing liquid of ring liquid carries out being thermally formed mixed once steam；Evaporator, the evaporator are connected to setting with the heater；
Secondary mixed vapour, mixed concentrated liquid are formed for carrying out gas-liquid separation to the mixed once steam；Part mixed concentrated liquid
As circulation fluid；First vapour compression machine, first vapour compression machine are connected to by the first steam outlet pipe with the evaporator
Setting, first vapour compression machine are connected to setting with the heater by the first steam inlet tube；For to described secondary mixed
It closes both vapor compression to heat up to form mixing compressed steam, heat source of the mixing compressed steam as the heater；One
The condensation by mixing liquid formed after dividing the mixing compressed steam to condense in the heater；Organic matter stripping tower, it is described organic
Object stripper is connected to setting with the heater；Gas-liquid separation, which is carried out, for the mixing compressed steam described in another part forms one
Secondary stripper steam, stripper concentrate；Second vapour compression machine, second vapour compression machine by the second steam outlet pipe with
The organic matter stripping tower connection setting；For heating up to form stripper compressed steam to a stripper both vapor compression；
Reboiler, the reboiler are connected to setting with the organic matter stripping tower, the reboiler by the second steam inlet tube with it is described
The connection setting of second vapour compression machine；It is secondary for be thermally formed to the condensation by mixing liquid and/or stripper concentrate
Stripper steam, heat source of the stripper compressed steam as the reboiler.
Preferably, further includes: the first condensate liquid collecting tank, the first condensate liquid collecting tank respectively with the heater,
Organic matter stripping tower connection setting；What is formed after condensing in the heater for mixing compressed steam described in collection part is mixed
Close condensate liquid；Second condensate liquid collecting tank, the second condensate liquid collecting tank are connected to setting with the reboiler；For collection portion
The stripper condensate liquid for dividing the stripper compressed steam to be formed after the reboiler partial condensation.
Preferably, further includes: mixed concentrated liquid pump, the mixed concentrated liquid pump are connected to setting with the evaporator；For
The part mixed concentrated liquid is discharged outside the evaporator；Waste liquid surge tank, the waste liquid surge tank and the organic matter vapour
Stripper connection setting；It is flowed into the waste liquid surge tank for caching the stripper waste water in the organic matter stripping tower；Waste liquid
Pump, the waste drains pump are connected to setting with the waste liquid surge tank；For the waste liquid surge tank to be discharged in the stripper waste water
Outside, and/or by the stripper waste water it is transmitted back in the organic matter stripping tower.
Preferably, further includes: recycle liquid pump, the recycle liquid pump are connected to setting with liquid input tube, described for inputting
Organic wastewater to be processed；The recycle liquid pump is connected to setting with the evaporator by outlet tube, the recycle liquid pump by into
Liquid pipe is connected to setting with the heater；It is described for the mixing liquid of the organic wastewater to be processed, circulation fluid to be delivered to
In heater.
Preferably, further includes: the first condensate pump, first condensate pump pass through the first condensate liquid outlet pipe and described the
The connection setting of one condensate liquid collecting tank, first condensate pump are connected by the first condensate liquid inlet pipe and the organic matter stripping tower
Logical setting；For the condensation by mixing liquid to be delivered to the organic matter stripping tower from the first condensate liquid collecting tank
Portion；Second condensate pump, second condensate pump are connected to by the second condensate liquid outlet pipe with the second condensate liquid collecting tank
Setting；For the stripper condensate liquid to be discharged from the second condensate liquid collecting tank；Stripper concentrate pump, the vapour
Stripper concentrate pump is connected to setting with the organic matter stripping tower；For the part stripper concentrate discharge is described organic
Outside object stripper.
The present invention also provides a kind of method for processing organic wastewater, comprising the following steps: by organic wastewater to be processed and circulation
Liquid is delivered in heater, is thermally formed mixed once steam to the mixing liquid of organic wastewater to be processed and circulation fluid；It is described
Mixed once steam enters in evaporator after gas-liquid separation from the heater, forms secondary mixed vapour, mixed concentrated liquid；Portion
The mixed concentrated liquid is divided to flow into the heater as circulation fluid from the evaporator；The secondary mixed vapour is from described
Evaporator enters in the first vapour compression machine shorten heating into after form mixing compressed steam, the mixing compressed steam is as heating
Heat source is delivered in the heater from first vapour compression machine；The part mixing compressed steam is in the heater
Condensation by mixing liquid is formed after condensation；The part mixing compressed steam, the condensation by mixing liquid have been delivered to from the heater
In machine object stripper；Mixing compressed steam gas-liquid separation in the organic matter stripping tower in part forms a stripper and steams
Vapour, stripper concentrate；Stripper steam enters in the second vapour compression machine from the organic matter stripping tower to be compressed
Heating forms stripper compressed steam；The condensation by mixing liquid and/or stripper concentrate enter from the organic matter stripping tower
In reboiler；The stripper compressed steam enters in the reboiler as heat source from second vapour compression machine,
The condensation by mixing liquid and/or stripper concentrate are carried out to be thermally formed secondary stripper steam；The secondary stripper steams
Vapour enters gas-liquid separation in the organic matter stripping tower from the reboiler and forms a stripper steam, stripper concentrate.
Preferably, condensation by mixing liquid is formed after the part mixing compressed steam condenses in the heater, it is described mixed
Condensate liquid is closed to be delivered in the organic matter stripping tower by the first condensate liquid collecting tank from the heater；The part stripping
Tower compressed steam forms stripper condensate liquid after condensing in the reboiler, and the stripper condensate liquid is defeated from the reboiler
It send into the second condensate liquid collecting tank.
Preferably, it is pumped using mixed concentrated liquid and the part mixed concentrated liquid is discharged outside the evaporator；It is described organic
Stripper waste water in object stripper flows into waste liquid surge tank；The waste liquid is discharged in the stripper waste water using waste drains pump
Outside surge tank, and/or the stripper waste water is transmitted back in the organic matter stripping tower.
Preferably, the organic wastewater to be processed enters the recycle liquid pump, the circulation fluid from the liquid input tube
The recycle liquid pump is flowed into from the evaporator；The recycle liquid pump is by the organic wastewater to be processed, the mixed liquor of circulation fluid
Body is delivered in the heater.
Preferably, the condensation by mixing liquid is delivered to institute from the first condensate liquid collecting tank using the first condensate pump
State the top of organic matter stripping tower；Using the second condensate pump by the stripper condensate liquid from the second condensate liquid collecting tank
Middle discharge；The part stripper concentrate is discharged outside the organic matter stripping tower using stripper concentrate pump.
Compared with prior art, a kind of organic wastewater treating system provided by the invention and method at least have with next
Kind the utility model has the advantages that
1), the present invention is in treatment of Organic Wastewater, and evaporator carries out gas-liquid separation to mixed once steam, in gas-liquid separation
In the process, can by organic wastewater heavy organic matter and light organic matter separate, in mixed concentrated liquid containing weight organic matter, it is secondary
Contain light organic matter in mixed vapour；Organic matter stripping tower is isolated condensation by mixing liquid and is mixed light organic in compressed steam
Object, to meet the different biochemical processing methods of weight organic matter and light organic matter.
In addition, the secondary mixed vapour that gas-liquid separation comes out in evaporator first passes through before being sent into organic matter stripping tower
It crosses the first vapour compression machine to be sent into heater as heat source, takes full advantage of the condensation of the Low Temperature Thermal and steam of waste water
Heat；The stripper steam that gas-liquid separation goes out in organic matter stripping tower first passes through the second vapour compression machine and is sent into reboiler
It is middle to be used as heat source, take full advantage of the Low Temperature Thermal of waste water and the condensation heat of steam；It is external to reduce heater, light organic matter
Carry out the confession of steam in requisition for improving capacity usage ratio and economic benefit.
Part mixed concentrated liquid enters in heater together as circulation fluid and organic wastewater to be processed, on the one hand: can be with
The demand to additional cycles cooling water is reduced, mixed concentrated liquid is reused, has effectively saved water resource, reduced organic waste
Cost of water treatment.On the other hand: the heavy organic matter and light organic matter that can be further separated out in mixed concentrated liquid improve separation
Precision.Part stripper concentrate, which is again introduced into reboiler, is thermally formed secondary stripper steam, can be further separated out vapour
Light organic matter in stripper concentrate.
Organic wastewater treating system in the present invention, has that structure is simple, reduces equipment making cost, improves economic effect
The advantages that benefit, the treatment effeciency of organic wastewater is high.
2), the present invention is only when system just starts, and introduces a small amount of steam of external consumption as heater and reboiler
Heat source can close the input of external steam, by right after the first vapour compression machine and the second vapour compression machine work normally
After the secondary mixed vapour of evaporator, a stripper steam of organic matter stripping tower are pressurizeed, respectively as heater, again
The heat source for boiling device uses, and significantly reduces the consumption of external steam.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of organic wastewater treating system in the present invention.
Drawing reference numeral explanation:
101-102-outlet tubes of liquid input tube
103-the first the 104-the first steam inlet tube of steam outlet pipe
108-the second the 109-the second steam inlet tube of steam outlet pipe
201-202-mixed concentrated liquids of recycle liquid pump pump
203-the first the 204-the second condensate pump of condensate pump
205-stripper 206-waste drains pumps of concentrate pump
301-302-heaters of evaporator
303-the first vapour compression machine the 304-the first condensate liquid collecting tank
305-the 306-the second vapour compression machines of organic matter stripping tower
307-reboiler the 308-the second condensate liquid collecting tanks
309-waste liquid surge tanks
Specific embodiment
Illustrate technical solution of the present invention in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, according to one embodiment of present invention, a kind of organic wastewater treating system, comprising:
Heater 302 carries out being thermally formed mixed once for the mixing liquid to organic wastewater to be processed and circulation fluid
Steam；Evaporator 301, the evaporator 301 are connected to setting with the heater 302；For to the mixed once steam into
Row gas-liquid separation forms secondary mixed vapour, mixed concentrated liquid；Part mixed concentrated liquid is as circulation fluid；Wherein, evaporator 301
Set on the top of heater 302.First vapour compression machine 303, first vapour compression machine 303 pass through the first steam outlet pipe
103 are connected to setting with the evaporator 301, and first vapour compression machine 303 passes through the first steam inlet tube 104 and the heating
The connection setting of device 302；For forming mixing compressed steam, the mixing compressed steam to the secondary mixed vapour compression heating
Heat source as the heater 302；A part of mixing compressed steam is formed after condensing in the heater 302
Condensation by mixing liquid；Organic matter stripping tower 305, the organic matter stripping tower 305 are connected to setting with the heater 302；For
The mixing compressed steam described in another part carries out gas-liquid separation and forms a stripper steam, stripper concentrate；Second steams
Vapour compressor 306, second vapour compression machine 306 are connected to by the second steam outlet pipe 108 with the organic matter stripping tower 305
Setting；For heating up to form stripper compressed steam to a stripper both vapor compression；Reboiler 307, the reboiler
307 are connected to setting with the organic matter stripping tower 305, and the reboiler 307 is steamed by the second steam inlet tube 109 with described second
The connection setting of vapour compressor 306；For carrying out being thermally formed secondary stripping to the condensation by mixing liquid and/or stripper concentrate
Tower steam, heat source of the stripper compressed steam as the reboiler 307.
As shown in Figure 1, it is directed to the improvement of above-described embodiment, and in the present embodiment, this organic wastewater treating system, further includes:
First condensate liquid collecting tank 304, the first condensate liquid collecting tank 304 respectively with the heater 302, organic matter stripping tower
305 connection settings；The condensation by mixing formed after being condensed in the heater 302 for mixing compressed steam described in collection part
Liquid；Second condensate liquid collecting tank 308, the second condensate liquid collecting tank 308 are connected to setting with the reboiler 307；For receiving
The stripper condensate liquid that the collection part stripper compressed steam is formed after 307 partial condensation of reboiler.
As shown in Figure 1, it is directed to the improvement of above-described embodiment, and in the present embodiment, this organic wastewater treating system, further includes:
Mixed concentrated liquid pump 202, the mixed concentrated liquid pump 202 are connected to setting with the evaporator 301；For part mixing to be concentrated
Liquid is discharged outside the evaporator 301；Waste liquid surge tank 309, the waste liquid surge tank 309 connect with the organic matter stripping tower 305
Logical setting；It is flowed into the waste liquid surge tank 309 for caching the stripper waste water in the organic matter stripping tower 305；Waste liquid
Pump 206, the waste drains pump 206 is connected to setting with the waste liquid surge tank 309；For stripper waste water discharge is described useless
Outside liquid surge tank 309, biochemical treatment or reuse are carried out；And/or the stripper waste water is transmitted back to the organic matter stripping tower
In 305.
As shown in Figure 1, it is directed to the improvement of above-described embodiment, and in the present embodiment, this organic wastewater treating system, further includes:
Recycle liquid pump 201, the recycle liquid pump 201 are connected to setting with liquid input tube 101, for inputting the organic waste to be processed
Water；The recycle liquid pump 201 is connected to setting with the evaporator 301 by outlet tube 102, the recycle liquid pump 201 by into
Liquid pipe is connected to setting with the heater 302；For the mixing liquid of the organic wastewater to be processed, circulation fluid to be delivered to institute
It states in heater 302.
As shown in Figure 1, it is directed to the improvement of above-described embodiment, and in the present embodiment, this organic wastewater treating system, further includes:
First condensate pump 203, first condensate pump 203 pass through the first condensate liquid outlet pipe and the first condensate liquid collecting tank
304 connection settings, first condensate pump 203 are connected to the organic matter stripping tower 305 by the first condensate liquid inlet pipe and are set
It sets；For the condensation by mixing liquid to be delivered to the organic matter stripping tower 305 from the first condensate liquid collecting tank 304
Portion；Second condensate pump 204, second condensate pump 204 are collected by the second condensate liquid outlet pipe and second condensate liquid
The connection setting of tank 308；For the stripper condensate liquid to be discharged from the second condensate liquid collecting tank 308；Stripper is dense
Contracting liquid pump 205, the stripper concentrate pump 205 are connected to setting with the organic matter stripping tower 305；For by the part vapour
Stripper concentrate is discharged outside the organic matter stripping tower 305.
According to one embodiment of present invention, a kind of method for processing organic wastewater, comprising the following steps: will be to be processed organic
Waste water and circulation fluid are delivered in heater 302, are thermally formed once to the mixing liquid of organic wastewater to be processed and circulation fluid
Mixed vapour.Preferably, the organic wastewater to be processed enters the recycle liquid pump 201 from the liquid input tube 101, described
Circulation fluid flows into the recycle liquid pump 201 from the evaporator 301；The recycle liquid pump 201 by the organic wastewater to be processed,
The mixing liquid of circulation fluid is delivered in the heater 302.
After the mixed once steam is from the heater 302 into gas-liquid separation in evaporator 301, secondary mixing is formed
Steam, mixed concentrated liquid；Part mixed concentrated liquid flows into the heater 302 as circulation fluid from the evaporator 301.It is excellent
Choosing, the part mixed concentrated liquid is discharged outside the evaporator 301 using mixed concentrated liquid pump 202, carries out biochemical treatment.
The secondary mixed vapour is formed after shortening heating into the evaporator 301 the first vapour compression machine 303 of entrance
Compressed steam is mixed, the mixing compressed steam is delivered to described add from first vapour compression machine 303 as heat source
In hot device 302；A part of mixing compressed steam forms condensation by mixing liquid after condensing in the heater 302.
Mixing compressed steam described in another part is delivered to the middle part of organic matter stripping tower 305 from the heater 302；Separately
The gas-liquid separation in the organic matter stripping tower 305 of a part of mixing compressed steam forms a stripper steam, stripping
Tower concentrate.
Stripper steam, which enters to compress in the second vapour compression machine 306 from the organic matter stripping tower 305, to be risen
Temperature forms stripper compressed steam.
The condensation by mixing liquid is sent to the top of organic matter stripping tower 305 from heater 302；The condensation by mixing liquid
And/or stripper concentrate enters in reboiler 307 from the organic matter stripping tower 305；The stripper compressed steam conduct
Heat source enters in the reboiler 307 from second vapour compression machine 306, to the condensation by mixing liquid and/or stripping
Tower concentrate carries out being thermally formed secondary stripper steam；The secondary stripper steam is from described in the reboiler 307 entrance
Gas-liquid separation forms a stripper steam, stripper concentrate in organic matter stripping tower 305.
Preferably, the stripper waste water in the organic matter stripping tower 305 flows into waste liquid surge tank 309；Utilize waste liquid
The stripper waste water is discharged outside the waste liquid surge tank 309 pump 206, carry out biochemical treatment；And/or by the stripper
Waste water is transmitted back in the organic matter stripping tower 305,.
For the improvement of above-described embodiment, in the present embodiment, a part of mixing compressed steam is in the heater 302
Condensation by mixing liquid is formed after middle condensation, the condensation by mixing liquid is defeated from the heater 302 by the first condensate liquid collecting tank 304
It send into the organic matter stripping tower 305；Preferably, using the first condensate pump 203 by the condensation by mixing liquid from described
One condensate liquid collecting tank 304 is delivered to the top of the organic matter stripping tower 305.
The part stripper compressed steam forms stripper condensate liquid, the vapour after condensing in the reboiler 307
Stripper condensate liquid is delivered in the second condensate liquid collecting tank 308 from the reboiler 307.Preferably, the second condensate pump is utilized
204 the stripper condensate liquid is discharged from the second condensate liquid collecting tank 308, and sending to main process unit recycle makes
With increasing operation rate；The organic matter stripping tower is discharged in the part stripper concentrate using stripper concentrate pump 205
Outside 305, send to main process unit and be recycled, increased operation rate.
Just when starting, the first vapour compression machine 303 and the also abnormal starting of the second vapour compression machine 306, the first outside is steamed
Vapour input channel and heater 302 are in connected state, and the second external steam input channel and reboiler 307 are in connected state
State introduces external steam as heat source to heater 302 and reboiler 307 respectively and uses, to the first vapour compression machine 303 and
After two vapour compression machines 306 gradually work normally, the supply of external steam can be gradually reduced, until stopping supplying external steaming
Vapour.
According to another embodiment of the invention, a kind of method for processing organic wastewater, comprising the following steps: Lai Zizhu technique
The waste water to be processed of device is sent to the entrance of recycle liquid pump 201, and is sent into heater 302 by recycle liquid pump 201；Meanwhile it following
Circulation fluid in evaporator 301 is also extracted out and is sent in heater 302 by ring liquid pump 201, and waste water and circulation fluid to be processed are heating
It is heated evaporation in device 302, enters and carries out vapor-liquid separation in evaporator 301, the secondary steam flashed off enters the through pipeline
After the pressurization of one vapour compression machine 303, it is used as heat source back to heater 302, after secondary steam condenses in heater 302
The first condensate liquid enter the first condensate liquid collecting tank 304 through pipeline, the first condensate liquid is directly sent through the first condensate pump 203
To the top of organic matter stripping tower 305, uncooled secondary steam also enters the middle part of organic matter stripping tower 305.
Waste water after being concentrated in evaporator 301, it is most of to pass through the circulating-heating in heater 302 of recycle liquid pump 201,
Small part concentrate sends out battery limit (BL) by mixed concentrated liquid pump 202 and carries out further burning disposal.It is organic in light component containing high concentration
When object waste water treatment system just starts, heater 302 uses external steam as heat source, when the first vapour compression machine 303 is normal
After work, the supply of phased out external steam.
First condensate liquid evaporates light organic matter and water in organic matter stripping tower 305 together, the stripper steam of evaporation
Enter the pressurization of the second vapour compression machine 306, after enter reboiler 307 as heat source.After being condensed in reboiler 307
The second condensate liquid, send main process unit back to through the second condensate pump 204 and be recycled, uncooled stripper steam also by
Pipeline is sent main process unit back to and is recycled.
305 tower bottom of organic matter stripping tower is the waste water that light organic matter is stripped off, and is entered after the extraction of tower bottom tower tray
Waste water surge tank, waste water are sent out through waste drains pump 206, and the waste water that small part returns to stripper returns to tower reactor, largely at biochemistry
The waste water of reason sends out battery limit (BL) and carries out biochemical treatment.The waste water of stripper is returned to, the circulating and evaporating in reboiler 307 is stripper
Heat is provided, stripper tower reactor waste water sends external main process unit reuse back to by the first liquid pump.Have in light component containing high concentration
When machine object waste water treatment system just starts, reboiler 307 uses the second live steam as heat source, when the second vapour compression machine
After 306 work normally, the supply of phased out external steam.
The compression ratio of first vapour compression machine 303 is 1.2~3.0, and the first vapour compression machine 303 is driven with variable-frequency motor,
For controlling the pressure of evaporator 301.The compression ratio of second vapour compression machine 306 is 1.2~3.0, the second vapour compression machine 306
It is driven with variable-frequency motor, for controlling the pressure of organic matter stripping tower 305.
When applying in the treatment unit for waste water of mating ammoxidation of propylene process units, 73t/t waste water can be sent to waste water
Processing system, the evaporation rate of waste water are 60%~85%, and stripper evaporation rate is about 10%~20%, by energy saving work of the invention
Skill only carries out waste water with live steam when system just starts using the Low Temperature Thermal of waste water and the condensation latent heat of secondary steam
It evaporates, after normal operation, it is no longer necessary to live steam, meanwhile, this process no longer needs recirculated cooling water.
Table 1:
Compared with existing multiple-effect evaporation wastewater treatment process, such as four-effect evaporation, using wastewater treatment energy saving technique, greatly
Amplitude reduction energy consumption and production cost.It is specific as shown in Table 1, can be seen that using traditional four-effect evaporation technique by comparing and
The steam per hour and circulation water consumption and energy consumption condition of wastewater treatment energy saving technique of the invention.
The above is only a preferred embodiment of the present invention, and the present invention is not limited in the content of embodiment.For in this field
Technical staff for, can have various change and change within the scope of technical solution of the present invention, made any variation and
Change, within that scope of the present invention.
Claims (10)
1. a kind of organic wastewater treating system characterized by comprising
Heater carries out being thermally formed mixed once steam for the mixing liquid to organic wastewater to be processed and circulation fluid；
Evaporator, the evaporator are connected to setting with the heater；For carrying out gas-liquid separation to the mixed once steam
Form secondary mixed vapour, mixed concentrated liquid；Part mixed concentrated liquid is as circulation fluid；
First vapour compression machine, first vapour compression machine are connected to setting, institute with the evaporator by the first steam outlet pipe
It states the first vapour compression machine and setting is connected to the heater by the first steam inlet tube；For to the secondary mixed vapour pressure
Contracting heating forms mixing compressed steam, heat source of the mixing compressed steam as the heater；It is a part of described mixed
Close the condensation by mixing liquid formed after compressed steam condenses in the heater；
Organic matter stripping tower, the organic matter stripping tower are connected to setting with the heater；For being mixed described in another part
Compressed steam carries out gas-liquid separation and forms a stripper steam, stripper concentrate；
Second vapour compression machine, second vapour compression machine are connected to the organic matter stripping tower by the second steam outlet pipe and are set
It sets；For heating up to form stripper compressed steam to a stripper both vapor compression；
Reboiler, the reboiler are connected to setting with the organic matter stripping tower, the reboiler by the second steam inlet tube with
The second vapour compression machine connection setting；For being thermally formed to the condensation by mixing liquid and/or stripper concentrate
Secondary stripper steam, heat source of the stripper compressed steam as the reboiler.
2. organic wastewater treating system as described in claim 1, which is characterized in that further include:
First condensate liquid collecting tank, the first condensate liquid collecting tank is connected to the heater, organic matter stripping tower respectively to be set
It sets；The condensation by mixing liquid formed after being condensed in the heater for mixing compressed steam described in collection part；
Second condensate liquid collecting tank, the second condensate liquid collecting tank are connected to setting with the reboiler；For collection part institute
State the stripper condensate liquid that stripper compressed steam is formed after the reboiler partial condensation.
3. organic wastewater treating system as described in claim 1, which is characterized in that further include:
Mixed concentrated liquid pump, the mixed concentrated liquid pump are connected to setting with the evaporator；For the part mixing to be concentrated
Liquid is discharged outside the evaporator；
Waste liquid surge tank, the waste liquid surge tank are connected to setting with the organic matter stripping tower；For caching the organic matter vapour
Stripper waste water in stripper flows into the waste liquid surge tank；
Waste drains pump, the waste drains pump are connected to setting with the waste liquid surge tank；For stripper waste water discharge is described useless
Outside liquid surge tank, and/or the stripper waste water is transmitted back in the organic matter stripping tower.
4. organic wastewater treating system as described in claim 1, which is characterized in that further include:
Recycle liquid pump, the recycle liquid pump are connected to setting with liquid input tube, for inputting the organic wastewater to be processed；
The recycle liquid pump is connected to setting with the evaporator by outlet tube, and the recycle liquid pump is added by inlet tube with described
Hot device connection setting；For the mixing liquid of the organic wastewater to be processed, circulation fluid to be delivered in the heater.
5. the organic wastewater treating system as described in any one of Claims 1 to 4, which is characterized in that further include:
First condensate pump, first condensate pump are connected to by the first condensate liquid outlet pipe with the first condensate liquid collecting tank
Setting, first condensate pump are connected to setting with the organic matter stripping tower by the first condensate liquid inlet pipe；For will be described
Condensation by mixing liquid is delivered to the top of the organic matter stripping tower from the first condensate liquid collecting tank；
Second condensate pump, second condensate pump are connected to by the second condensate liquid outlet pipe with the second condensate liquid collecting tank
Setting；For the stripper condensate liquid to be discharged from the second condensate liquid collecting tank；
Stripper concentrate pump, the stripper concentrate pump are connected to setting with the organic matter stripping tower；For by part institute
Stripper concentrate is stated to be discharged outside the organic matter stripping tower.
6. a kind of method for processing organic wastewater, which comprises the following steps:
Organic wastewater to be processed and circulation fluid are delivered in heater, to the mixing liquid of organic wastewater to be processed and circulation fluid
It is thermally formed mixed once steam；
The mixed once steam enters in evaporator after gas-liquid separation from the heater, forms secondary mixed vapour, mixing
Concentrate；The part mixed concentrated liquid flows into the heater as circulation fluid from the evaporator；
The secondary mixed vapour from the evaporator enter the first vapour compression machine in shorten into heating after formed mixing compression steam
Vapour, the mixing compressed steam are delivered in the heater as heat source from first vapour compression machine；Part institute
It states after mixing compressed steam condenses in the heater and forms condensation by mixing liquid；
The part mixing compressed steam, the condensation by mixing liquid are delivered in organic matter stripping tower from the heater；Part
Mixing compressed steam gas-liquid separation in the organic matter stripping tower forms a stripper steam, stripper concentrate；
Stripper steam enters compression heating in the second vapour compression machine from the organic matter stripping tower and forms stripping
Tower compressed steam；
The condensation by mixing liquid and/or stripper concentrate enter in reboiler from the organic matter stripping tower；The stripper
Compressed steam as heat source from second vapour compression machine enter the reboiler in, to the condensation by mixing liquid and/
Or stripper concentrate carries out being thermally formed secondary stripper steam；The secondary stripper steam enters institute from the reboiler
It states gas-liquid separation in organic matter stripping tower and forms a stripper steam, stripper concentrate.
7. method for processing organic wastewater as claimed in claim 6, it is characterised in that:
The part mixing compressed steam forms condensation by mixing liquid after condensing in the heater, the condensation by mixing liquid passes through
First condensate liquid collecting tank is delivered in the organic matter stripping tower from the heater；
The part stripper compressed steam forms stripper condensate liquid, the stripper condensation after condensing in the reboiler
Liquid is delivered in the second condensate liquid collecting tank from the reboiler.
8. method for processing organic wastewater as claimed in claim 6, it is characterised in that:
The part mixed concentrated liquid is discharged outside the evaporator using mixed concentrated liquid pump；
Stripper waste water in the organic matter stripping tower flows into waste liquid surge tank；
The stripper waste water is discharged outside the waste liquid surge tank using waste drains pump, and/or the stripper waste water is conveyed
It returns in the organic matter stripping tower.
9. method for processing organic wastewater as claimed in claim 6, it is characterised in that:
The organic wastewater to be processed enters the recycle liquid pump from the liquid input tube, and the circulation fluid is from the evaporator
Flow into the recycle liquid pump；
The mixing liquid of the organic wastewater to be processed, circulation fluid is delivered in the heater by the recycle liquid pump.
10. the method for processing organic wastewater as described in any one of claim 6~9, it is characterised in that:
The condensation by mixing liquid is delivered to the organic matter vapour from the first condensate liquid collecting tank using the first condensate pump
The top of stripper；
The stripper condensate liquid is discharged from the second condensate liquid collecting tank using the second condensate pump；
The part stripper concentrate is discharged outside the organic matter stripping tower using stripper concentrate pump.
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