CN104595877B - Multi-step pressure reduction reclaims the device and its recovery method of hot waste water waste heat - Google Patents
Multi-step pressure reduction reclaims the device and its recovery method of hot waste water waste heat Download PDFInfo
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- CN104595877B CN104595877B CN201510022450.5A CN201510022450A CN104595877B CN 104595877 B CN104595877 B CN 104595877B CN 201510022450 A CN201510022450 A CN 201510022450A CN 104595877 B CN104595877 B CN 104595877B
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- 239000002351 wastewater Substances 0.000 title claims abstract description 141
- 230000009467 reduction Effects 0.000 title claims abstract description 63
- 239000002918 waste heat Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000011084 recovery Methods 0.000 title claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 239000006260 foam Substances 0.000 claims abstract description 11
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 11
- 230000008676 import Effects 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000010865 sewage Substances 0.000 claims description 27
- 238000012545 processing Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000012856 packing Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 9
- 239000003245 coal Substances 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 7
- 238000010025 steaming Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 230000009615 deamination Effects 0.000 description 4
- 238000006481 deamination reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000002309 gasification Methods 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000013020 steam cleaning Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Physical Water Treatments (AREA)
Abstract
Multi-step pressure reduction reclaims the device and its recovery method of hot waste water waste heat.Heat-exchange apparatus easily causes heat exchange pipeline to block, cause system be unable to long-term operation and cleaning difficulty it is big.The composition of the present invention includes：Multi-step pressure reduction tower（1）, multi-step pressure reduction tower is interior to be provided with one-level vacuum flashing device（2）, second depressurized flash vessel（3）, three-level vacuum flashing device（4）, one-level blender（5）, secondary mixer（6）, three-level blender（7）；Foam removal brokenly bubble plate is provided with vacuum flashing device（8）, flash vessel column plate（9）, foam removal brokenly bubble plate top is provided with saturated vapor outlet（10）；By dividing plate between blender（11）Separate, top is provided with heated waste water import（12）, bottom is exported provided with heated waste water（13）；Saturated vapor outlet, heated waste water import and Venturi transmission ejector（2）Connection, heated waste water outlet passes through waste water circulation pump（3）It is connected with Venturi transmission ejector.The present invention is used to reclaim hot waste water waste heat.
Description
Technical field：
The present invention relates to the device and its recovery method that a kind of multi-step pressure reduction reclaims hot waste water waste heat.
Background technology：
The industrial circles such as the coal chemical industry, petrochemical industry, electric power, papermaking, printing and dyeing of China discharge substantial amounts of hot waste water, and its is net
Change process is related to the processes such as extraction, distillation, absorption, biochemical treatment, and different workshop sections are different to temperature requirement, it is necessary to frequently lifting
Temperature, causes the energy consumption of sewage disposal very high.For example, the high temperature produced in coal chemical technology, pressurization static bed lurgi gasifier gasification
Sewage, temperature reaches 140-200 DEG C, to reach that discharge standard must be by stripping deamination and desulfurization, extracting and dephenolizing, biochemical treatment, activity
The processes such as charcoal absorption, energy consumption and operating cost are high, and production cost remains high.How to ensure that coal gasification wastewater processing is up to standard
Meanwhile, the problem of reduction sewage disposal energy consumption is urgent solves.Currently, energy-conserving and environment-protective turn into Sustainable Socioeconomic Development
Focal issue, requirement of the China to wastewater discharge standard is increasingly improved, waste water treatment process technical requirements also more and more higher how
The energy consumption of reduction system is the problem of enterprise must take into consideration, and is also to evaluate the advanced key index of water technology.
The heat recovery of high temperature sewage can significantly energy resource consumption, improve energy utilization rate, with very high environmental protection
Benefit and economic benefit.The heat-exchange apparatus of pipe heat exchanger and use heat pump principle is generally to use waste heat recovery plant, but
Salt, organic-flocculation thing that bulky grain, suspended impurity, low temperature in sewage are separated out etc. easily causes heat exchange pipeline fouling, blocking,
System is caused to be unable to long-term operation, and cleaning difficulty is big, workload is big, working environment is poor.
The content of the invention：
It is an object of the invention to provide the device and its recovery method that a kind of multi-step pressure reduction reclaims hot waste water waste heat.
Above-mentioned purpose is realized by following technical scheme：
A kind of multi-step pressure reduction reclaims the device of hot waste water waste heat, and its composition includes：Multi-step pressure reduction tower, described multistage subtracts
One-level vacuum flashing device, second depressurized flash vessel, three-level vacuum flashing device, one-level mixing are sequentially provided with pressure tower from top to bottom
Device, secondary mixer, three-level blender；Described one-level, two grades, the top of three-level vacuum flashing device be provided with foam removal brokenly bubble plate,
Bottom is provided with above flash vessel column plate, described foam removal brokenly bubble plate provided with saturated vapor outlet；Described one-level, two grades, three-level
Separated between blender by dividing plate, top is provided with heated waste water import, bottom is exported provided with heated waste water；Described saturated vapor
Outlet, described heated waste water import be connecteds with Venturi transmission ejector, described heated waste water outlet pass through waste water circulation pump and
Described Venturi transmission ejector connection.
Described multi-step pressure reduction reclaims useless provided with high temperature in the device of hot waste water waste heat, described one-level vacuum flashing device
Water distributor, described hot waste water distributor is connected with hot waste water import.
Described multi-step pressure reduction reclaims the device of hot waste water waste heat, the sudden strain of a muscle in described one-level, second depressurized flash vessel
The bottom of steaming device column plate is connected with down-comer.
Described multi-step pressure reduction reclaims the flash vessel tower in the device of hot waste water waste heat, described three-level vacuum flashing device
Plate bottom is provided with high temperature sewage draining exit.
Described multi-step pressure reduction reclaims the device of hot waste water waste heat, and described hot waste water distributor can be shower nozzle
And/or antipriming pipe, pressure drop 1-20KPa.
Described multi-step pressure reduction reclaims the device of hot waste water waste heat, and described foam removal brokenly bubble plate can be porous plate, silk
Net or packing layer.
Described multi-step pressure reduction reclaims flash vessel and mixing in the device of hot waste water waste heat, described multi-step pressure reduction tower
The series of device can be set as 1-6 grades according to technological requirement.
A kind of described multi-step pressure reduction reclaims the recovery method of the device of hot waste water waste heat, and this method step is as follows：
Hot waste water of the temperature higher than 70 DEG C enters first order vacuum flashing from the hot waste water distributor of multi-step pressure reduction tower
Device；The low-temperature wastewater of temperature to be heated less than 60 DEG C, by Venturi transmission ejector, aspirates multi-step pressure reduction tower with 1-5m/s flow velocitys
The low-pressure steam produced in third level vacuum flashing device, waste water is mixed with steam, and low-temperature wastewater temperature improves 10-50 DEG C and flowed into
Multi-step pressure reduction tower bottom first order blender；
Waste water in first order blender is through waste water circulation pump, with 1-5m/s flow velocitys by Venturi transmission ejector, suction the
The low-pressure steam that second depressurized level flash vessel is produced, waste water mix with steam, 10-50 DEG C of entrance tower bottom of wastewater temperature raising the
Secondary mixer；The saturation water of second level vacuum flashing device flows into third level vacuum flashing device by down-comer；
Waste water in the blender of the second level is passed through in Venturi transmission ejector, suction through waste water circulation pump with 1-5m/s flow velocitys
The low-pressure steam that multi-step pressure reduction tower first order vacuum flashing device is produced, waste water is mixed with steam, and wastewater temperature improves 10-50 DEG C and entered
Enter tower bottom third level blender；The saturation water of first order vacuum flashing device flows into second level vacuum flashing device by down-comer；
Waste water after being heated in bottom of towe blender flows out from delivery port, into next processing workshop section；Heat is reclaimed in vacuum flashing
Hot waste water after amount processing, flows out from the sewage draining exit of third level vacuum flashing device bottom, send treatment and finishing section.
Beneficial effects of the present invention：
The present invention proposes the heat recovering process that the method flashed using multi-step pressure reduction carries out high temperature sewage, hot waste water
Flashed through multi-step pressure reduction, contained high temperature sensible heat is converted into saturated vapor latent heat step by step, Venturi transmission ejector is provided needed for flash distillation
Vacuum, while saturated vapor is mixed in Venturi transmission ejector with waste water to be heated, heating low-temperature wastewater is to certain
Temperature, so as to reach recovery waste water residual heat, reduces the purpose of the energy consumption of heated waste water, reduction unit sewage disposal energy consumption 30-
80%。
The present invention realizes the heat exchange of high temperature sewage and pretreating sewage by the way of step heat exchange of flash evaporation, solves often
Advise the shortcoming that heat exchanger reclaims the easy fouling and clogging of pipeline during heat；The main equipment of invention is with multistage flash evaporation function
Low Pressure Flashing Column, the equipment is made up of multilayer column plate and inner member, and flash column top is multistage flash evaporation section, and bottom is Hybrid Heating
The series of section, flash zone and mixing section can be set according to technological requirement；The suction and mixing of flash column combination Venturi transmission ejector
The sensible heat of hot waste water, is converted into the latent heat of saturated vapor by effect step by step, heats pending low-temperature sewage, reaches energy-conservation drop
Consumption, and low, the stable purpose of system investments.
The present invention reclaims the sensible heat of high temperature sewage, low-pressure steam cleaning, process heat exchange effect using multi-step pressure reduction flash evaporation
Rate is high；The pollutant that hot waste water vacuum flashing temperature-fall period is separated out can be discharged along down-comer, and the blocking of pipeline is not easily caused, real
The long-period stable operation of existing equipment；Multistage flash evaporator and blender combination are in a tower, compact equipment, occupation of land face
Product is small；Operational control is simple, and production capacity is big.
The present invention is suitable for handling the processing procedure of coal chemical industry high-temperature wash waste water, in stripping deamination depickling-extracting and dephenolizing
In technical process, high temperature sewage can be effectively reclaimed, reduction System steam consumption realizes macrocyclic stable operation, is coal chemical industry
The energy-saving of wastewater treatment process provides feasible technology path, it can also be used to the sewage of the industry such as petrochemical industry, printing and dyeing, papermaking
Processing procedure, be particularly suitable for use in the solubility salt containing high concentration, flocculate, organic matter, it is easy to which low temperature, which is separated out, causes pipeline
Fouling, the energy recovery process of the hot industry waste water blocked, alternative common pipe heat exchanger reduce unit sewage disposal
Energy consumption more than 50%, has the advantages that heat recovery efficiency height, long-period stable operation.
Brief description of the drawings：
Accompanying drawing 1 is the process chart of the present invention.
Accompanying drawing 2 is the structural representation of multi-step pressure reduction tower of the present invention.
Embodiment：
Embodiment 1：
A kind of multi-step pressure reduction reclaims the device of hot waste water waste heat, and its composition includes：Multi-step pressure reduction tower 1, described multistage
One-level vacuum flashing device 4, second depressurized flash vessel 5, three-level vacuum flashing device 6, one-level are sequentially provided with vacuum tower from top to bottom
Blender 7, secondary mixer 8, three-level blender 9；Described one-level, two grades, the top of three-level vacuum flashing device be provided with foam removal
Brokenly bubble plate 10, bottom is provided with above flash vessel column plate 11, described foam removal brokenly bubble plate provided with saturated vapor outlet 12；Described one
Level, two grades, separated by dividing plate 13 between three-level blender, top is provided with heated waste water import 14, and bottom goes out provided with heated waste water
Mouth 15；Described saturated vapor is exported, described heated waste water import is connected with Venturi transmission ejector 2, described heated waste water
Outlet is connected by waste water circulation pump 3 with described Venturi transmission ejector.
Embodiment 2：
Multi-step pressure reduction according to embodiment 1 reclaims the device of hot waste water waste heat, described one-level vacuum flashing device
Interior to be provided with hot waste water distributor 16, described hot waste water distributor is connected with hot waste water import 17.
Embodiment 3：
Multi-step pressure reduction according to embodiment 1 or 2 reclaims the device of hot waste water waste heat, described one-level, two grades subtract
The bottom of flash vessel column plate in pressure flash vessel is connected with down-comer 18.
Embodiment 4：
Multi-step pressure reduction according to embodiment 1 or 2 reclaims the device of hot waste water waste heat, described three-level vacuum flashing
Flash vessel column plate bottom in device is provided with high temperature sewage draining exit 19.
Embodiment 5：
Multi-step pressure reduction according to embodiment 1 or 2 reclaims the device of hot waste water waste heat, described hot waste water distribution
Device can be shower nozzle and/or antipriming pipe, pressure drop 1-20KPa.
Embodiment 6：
Multi-step pressure reduction according to embodiment 1 or 2 reclaims the device of hot waste water waste heat, and described foam removal brokenly bubble plate can
To be porous plate, silk screen or packing layer.
Embodiment 7：
Multi-step pressure reduction according to embodiment 1 or 2 is reclaimed in the device of hot waste water waste heat, described multi-step pressure reduction tower
Flash vessel and the series of blender can be set as 1-6 grades according to technological requirement.
Embodiment 8：
Multi-step pressure reduction described in a kind of one of embodiment 1-7 reclaims the recovery method of the device of hot waste water waste heat, the party
Method step is as follows：
Hot waste water of the temperature higher than 70 DEG C enters first order vacuum flashing from the hot waste water distributor of multi-step pressure reduction tower
Device；The low-temperature wastewater of temperature to be heated less than 60 DEG C, by Venturi transmission ejector, aspirates multi-step pressure reduction tower with 1-5m/s flow velocitys
The low-pressure steam produced in third level vacuum flashing device, waste water is mixed with steam, and low-temperature wastewater temperature improves 10-50 DEG C and flowed into
Multi-step pressure reduction tower bottom first order blender；
Waste water in first order blender is through waste water circulation pump, with 1-5m/s flow velocitys by Venturi transmission ejector, suction the
The low-pressure steam that second depressurized level flash vessel is produced, waste water mix with steam, 10-50 DEG C of entrance tower bottom of wastewater temperature raising the
Secondary mixer；The saturation water of second level vacuum flashing device flows into third level vacuum flashing device by down-comer；
Waste water in the blender of the second level is passed through in Venturi transmission ejector, suction through waste water circulation pump with 1-5m/s flow velocitys
The low-pressure steam that multi-step pressure reduction tower first order vacuum flashing device is produced, waste water is mixed with steam, and wastewater temperature improves 10-50 DEG C and entered
Enter tower bottom third level blender；The saturation water of first order vacuum flashing device flows into second level vacuum flashing device by down-comer；
Waste water after being heated in bottom of towe blender flows out from delivery port, into next processing workshop section；Heat is reclaimed in vacuum flashing
Hot waste water after amount processing, flows out from the sewage draining exit of third level vacuum flashing device bottom, send treatment and finishing section.
Embodiment 9：
Multi-step pressure reduction described in embodiment reclaims the device and its recovery method of hot waste water waste heat, multi-step pressure reduction tower diameter
0.4m, total high 15m；Wherein, the high 9m of flash zone, is divided into three stages of flashing, and mixing section 6m is divided into three-level blender；Coal plant's gas
Change producer gas wash water, after pressurized stripping deamination depickling, 150-160 DEG C of stripper bottom of towe discharge high temperature sewage temperature, stream
Measure 20t/h；20-25 DEG C of pretreating sewage temperature to be heated, flow 30t/h；The operation of the three stages of flashing device of multi-step pressure reduction tower
Pressure is respectively：0.08 ~ 0.12MPa of primary flash device operating pressure（G）, 0.02 ~ -0.02MPa of two-stage flash device operating pressure
（G）, -0.06 ~ -0.08MPa of three stages of flashing device operating pressure（G）.
Embodiment 10：
Multi-step pressure reduction described in embodiment reclaims the device and its recovery method of hot waste water waste heat, the discharge of stripper bottom
150-160 DEG C of hot waste water temperature, flow 20t/h, from multi-step pressure reduction tower tower distributor into the vacuum tower first order dodge
Steaming device, primary flash section operating pressure 0.1MPa（G）；20-30 DEG C pending of low-temperature wastewater temperature, flow 30t/h, flow velocity 1-
The low-pressure steam that 2m/s is produced by Venturi transmission ejector, suction vacuum tower third level flash vessel, keeps third level flash vessel behaviour
Make pressure -0.08MPa（G）, waste water mixes with steam, and wastewater temperature improves 15-20 DEG C of inflow vacuum tower bottom first order mixing
Device；Waste water in first order blender is through waste water circulation pump, and flow velocity 1-2m/s is by Venturi transmission ejector, aspirating vacuum tower two
The low-pressure steam that level flash vessel is produced, keeps second level flash vessel operating pressure 0.01MPa（G）, waste water mixes with steam, waste water
Temperature improves 15-20 DEG C and enters vacuum tower bottom second level blender；The saturation water of second level flash vessel is flowed into by down-comer
Third level flash vessel；Waste water in the blender of the second level is through waste water circulation pump, with 1-2m/s flow velocitys by Venturi transmission ejector,
The low-pressure steam that vacuum tower first order flash vessel is produced is aspirated, primary flash device operating pressure 0.1MPa is kept（G）, waste water is with steaming
Vapour is mixed, and wastewater temperature improves 10-15 DEG C and enters vacuum tower bottoms third level blender；The saturation water of first order flash vessel passes through
Down-comer flows into second level flash vessel；Waste water after being heated in bottom of towe blender flows out from delivery port, 60-70 DEG C of wastewater temperature,
Into next processing workshop section；Hot waste water temperature after vacuum flashing processing is reduced to 60 DEG C, from third level flash vessel bottom
Sewage draining exit flows out, and send treatment and finishing section.
Embodiment 11：
Multi-step pressure reduction described in embodiment reclaims the device and its recovery method of hot waste water waste heat, coal plant's gasification furnace
Gas wash water, after pressurized stripping deamination depickling, 140-150 DEG C of stripper bottom of towe discharge high temperature sewage temperature, flow
25t/h；20-30 DEG C of pretreating sewage temperature to be heated, flow 30t/h；The operation of three stages of flashing device in multi-step pressure reduction tower
Pressure is respectively：Primary flash device operating pressure 0.02MPa（G）, two-stage flash device operating pressure -0.02MPa（G）, three-level sudden strain of a muscle
Steaming device operating pressure -0.09MPa（G）；80-85 DEG C of the heated waste water temperature of bottom of towe outflow, into next processing workshop section；Decompression is dodged
Hot waste water temperature after steaming processing is reduced to 50 DEG C, send treatment and finishing section.
Embodiment 12：
Multi-step pressure reduction described in embodiment reclaims the device and its recovery method of hot waste water waste heat, the height that chemical plant is produced
Warm high pressure waste water, 180-200 DEG C of wastewater temperature, flow 10t/h；20-30 DEG C of pretreating sewage temperature to be heated, flow 30t/
h；In multi-step pressure reduction tower three stages of flashing section operating pressure be respectively：Primary flash device operating pressure 0.1MPa（G）, two grades of sudden strains of a muscle
Steaming device operating pressure -0.01MPa（G）, three stages of flashing device operating pressure -0.08MPa（G）；The heated waste water temperature of bottom of towe outflow
65-70 DEG C, into next processing workshop section；Hot waste water temperature after vacuum flashing processing is reduced to 60 DEG C, send treatment and finishing section.
Embodiment 13：
Multi-step pressure reduction described in embodiment reclaims the device and its recovery method of hot waste water waste heat, the height that chemical plant is produced
Warm high pressure waste water, 110-120 DEG C of wastewater temperature, flow 30t/h；20-30 DEG C of pretreating sewage temperature to be heated, flow 30t/
h；In multi-step pressure reduction tower three stages of flashing section operating pressure be respectively：Primary flash device operating pressure -0.01MPa（G）, two grades
Flash vessel operating pressure -0.04MPa（G）, three stages of flashing device operating pressure -0.08MPa（G）；The heated waste water temperature of bottom of towe outflow
70-75 DEG C of degree, into next processing workshop section；Hot waste water temperature after vacuum flashing processing is reduced to 60 DEG C, send post processing work
Section.
Claims (1)
1. a kind of multi-step pressure reduction reclaims the recovery method of the device of hot waste water waste heat, it is characterized in that：This method step is as follows：
Hot waste water of the temperature higher than 70 DEG C enters first order vacuum flashing device from the hot waste water distributor of multi-step pressure reduction tower；
The low-temperature wastewater of temperature to be heated less than 60 DEG C is with 1-5m/s flow velocitys by Venturi transmission ejector, and suction multistage subtracts
The low-pressure steam produced in tower third level vacuum flashing device is pressed, waste water is mixed with steam, low-temperature wastewater temperature improves 10-50 DEG C
And flow into multi-step pressure reduction tower bottom first order blender；
Waste water in first order blender passes through Venturi transmission ejector, suction second through waste water circulation pump with 1-5m/s flow velocitys
The low-pressure steam that level pressure reduction stage flash vessel is produced, waste water mix with steam, 10-50 DEG C of entrance tower bottom of wastewater temperature raising the
Secondary mixer；
The saturation water of second level vacuum flashing device flows into third level vacuum flashing device by down-comer；It is useless in the blender of the second level
Water is through waste water circulation pump, with 1-5m/s flow velocitys by Venturi transmission ejector, aspirating multi-step pressure reduction tower first order vacuum flashing
The low-pressure steam that device is produced, waste water is mixed with steam, and wastewater temperature improves 10-50 DEG C and enters tower bottom third level blender；The
The saturation water of one-level vacuum flashing device flows into second level vacuum flashing device by down-comer；
Waste water after being heated in bottom of towe blender flows out from delivery port, into next processing workshop section；Vacuum flashing is reclaimed at heat
Hot waste water after reason, flows out from the sewage draining exit of third level vacuum flashing device bottom, send treatment and finishing section；
Described multi-step pressure reduction reclaims the device of hot waste water waste heat, and its composition includes：Multi-step pressure reduction tower, described multi-step pressure reduction
Be sequentially provided with from top to bottom in tower one-level vacuum flashing device, second depressurized flash vessel, three-level vacuum flashing device, one-level blender,
Secondary mixer, three-level blender；Described one-level, two grades, the top of three-level vacuum flashing device be provided with foam removal brokenly bubble plate, bottom
Provided with flash vessel column plate, exported above described foam removal brokenly bubble plate provided with saturated vapor；Described one-level, two grades, three-level mixing
Separated between device by dividing plate, top is provided with heated waste water import, bottom is exported provided with heated waste water；Described saturated vapor goes out
Mouth, described heated waste water import are connected with Venturi transmission ejector, and described heated waste water outlet passes through waste water circulation pump and institute
The Venturi transmission ejector connection stated；
Hot waste water distributor is provided with described one-level vacuum flashing device, described hot waste water distributor enters with hot waste water
Mouth connection；
Described one-level, the bottom of the flash vessel column plate in second depressurized flash vessel are connected with down-comer；
Flash vessel column plate bottom in described three-level vacuum flashing device is provided with high temperature sewage draining exit；
Described hot waste water distributor is shower nozzle or antipriming pipe, pressure drop 1-20KPa；
Described foam removal brokenly bubble plate is porous plate or silk screen or packing layer；
The series of flash vessel and blender in described multi-step pressure reduction tower is set as 1-6 grades according to technological requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510022450.5A CN104595877B (en) | 2015-01-16 | 2015-01-16 | Multi-step pressure reduction reclaims the device and its recovery method of hot waste water waste heat |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510022450.5A CN104595877B (en) | 2015-01-16 | 2015-01-16 | Multi-step pressure reduction reclaims the device and its recovery method of hot waste water waste heat |
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| CN104595877A CN104595877A (en) | 2015-05-06 |
| CN104595877B true CN104595877B (en) | 2017-09-29 |
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| CN110642444A (en) * | 2019-10-28 | 2020-01-03 | 中国华电科工集团有限公司 | Vacuum phase-change wastewater concentration and flue gas waste heat recovery system |
| CN110746024B (en) * | 2019-10-28 | 2024-08-20 | 中国华电科工集团有限公司 | Low-temperature economizer waste water concentration waste heat recycling device |
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| CN112944969A (en) * | 2021-01-28 | 2021-06-11 | 山东佰腾知识产权运营中心有限公司 | Hierarchical tower waste heat recovery device for municipal sludge treatment |
| CN113018889B (en) * | 2021-05-28 | 2021-07-30 | 东营联合石化有限责任公司 | Heat exchange device for reflux of middle section of pressure reduction tower |
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| CN104595877A (en) | 2015-05-06 |
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