CN104595877A - Device for multi-stage decompression recycling high-temperature waste water residual heat and recycling method thereof - Google Patents
Device for multi-stage decompression recycling high-temperature waste water residual heat and recycling method thereof Download PDFInfo
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- CN104595877A CN104595877A CN201510022450.5A CN201510022450A CN104595877A CN 104595877 A CN104595877 A CN 104595877A CN 201510022450 A CN201510022450 A CN 201510022450A CN 104595877 A CN104595877 A CN 104595877A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 150
- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000006837 decompression Effects 0.000 title abstract 9
- 238000004064 recycling Methods 0.000 title abstract 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 11
- 230000009467 reduction Effects 0.000 claims description 66
- 239000002918 waste heat Substances 0.000 claims description 33
- 239000010865 sewage Substances 0.000 claims description 27
- 230000005540 biological transmission Effects 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 21
- 238000011084 recovery Methods 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000006260 foam Substances 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 7
- 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
- 238000007701 flash-distillation Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000009102 absorption Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000001816 cooling Methods 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
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004065 wastewater treatment 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
Abstract
The invention relates to a device for multi-stage decompression recycling high-temperature waste water residual heat and a recycling method of the device. Heat exchange equipment is easy to cause blockage of a heat exchange pipeline so as to result in incapability of long-term operation of a system and large cleaning difficulty. The device comprises a multi-stage decompression tower (1), wherein the multi-stage decompression tower is internally provided with a first-stage decompression flash evaporator (4), a second-stage decompression flash evaporator (5), a third-stage decompression flash evaporator (6), a first-stage mixer (7), a second-stage mixer (8) and a third-stage mixer (9); each decompression flash evaporator is internally provided with a defoaming and bubble-breaking plate (10) and a flash evaporator tower plate (11); a saturated steam outlet (12) is formed in the upper part of each defoaming and bubble-breaking plate; the mixers are separated by baffle plates (13); a heating waste water inlet (14) is formed on the upper part of each mixer, and a heating waste water outlet (15) is formed on the lower part of each mixer; the saturated steam outlets and the heating waste water inlets are connected with a Venturi injector (2); the heating waste water outlets are connected with the Venturi injector through a waste water circulating pump (3). The device for multi-stage decompression recycling the high-temperature waste water residual heat and the recycling method of the device are used for recycling the high-temperature waste water residual heat.
Description
technical field:
the present invention relates to device and recovery method thereof that a kind of multi-step pressure reduction reclaims hot waste water waste heat.
background technology:
the industrial circle such as Coal Chemical Industry, petrochemical industry, electric power, papermaking, printing and dyeing of China discharges a large amount of hot waste waters, its purification process relates to the processes such as extraction, distillation, absorption, biochemical treatment, different workshop section is different to temperature requirement, need frequent heating and cooling, cause the energy consumption of sewage disposal very high.Such as, in coal chemical technology, the high temperature sewage that pressurization static bed lurgi gasifier gasification produces, temperature reaches 140-200 DEG C, must through processes such as stripping deamination and desulfurization, extracting and dephenolizing, biochemical treatment, charcoal absorptions for reaching discharge standard, energy consumption and operating cost high, production cost remains high.How while the process of guarantee coal gasification wastewater is up to standard, reducing sewage disposal energy consumption is the urgent problem solved.Current, energy-conserving and environment-protective have become the focal issue of Sustainable Socioeconomic Development, the requirement of China to wastewater discharge standard improves day by day, waste water treatment process technical requirement is also more and more higher, the energy consumption how reducing system is the problem that enterprise must consider, is also the key index evaluating water technology advance.
the heat recovery of high temperature sewage can significantly energy resource consumption, improve energy utilization rate, there is very high environmental benefit and economic benefit.The heat-exchange apparatus of pipe heat exchanger and employing heat pump principle generally adopts waste heat recovery plant, but salt, organic-flocculation thing etc. that the bulky grain in sewage, suspended impurity, low temperature are separated out easily cause heat exchange pipeline fouling, blocking, cause system can not long-term operation, and cleaning difficulty be large, workload large, poor working environment.
summary of the invention:
the object of this invention is to provide device and recovery method thereof that a kind of multi-step pressure reduction reclaims hot waste water waste heat.
above-mentioned object is realized by following technical scheme:
a kind of multi-step pressure reduction reclaims the device of hot waste water waste heat, its composition comprises: multi-step pressure reduction tower, is provided with one-level vacuum flashing device, second depressurized flash vessel, three grades of vacuum flashing devices, one-level blender, secondary mixer, three grades of blenders in described multi-step pressure reduction tower from top to bottom successively; The top of described one-level, secondary, three grades of vacuum flashing devices is provided with foam removal broken bubble plate, and bottom is provided with flash vessel column plate, is provided with saturated vapor outlet above described foam removal broken bubble plate; Separated by dividing plate between described one-level, secondary, three grades of blenders, top is provided with heated waste water import, and bottom is provided with heated waste water outlet; Described saturated vapor outlet, described heated waste water import are connected with Venturi transmission ejector, and described heated waste water outlet is connected with described Venturi transmission ejector by waste water circulation pump.
described multi-step pressure reduction reclaims the device of hot waste water waste heat, and be provided with hot waste water distributor in described one-level vacuum flashing device, 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, and the bottom of the flash vessel column plate in described one-level, second depressurized flash vessel is connected with down-comer.
described multi-step pressure reduction reclaims the device of hot waste water waste heat, and the flash vessel column plate bottom in three grades of described vacuum flashing devices 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 broken bubble plate can be porous plate, silk screen or packing layer.
described multi-step pressure reduction reclaims the device of hot waste water waste heat, and the flash vessel in described multi-step pressure reduction tower and the progression of blender can be set as 1-6 level according to technological requirement.
described multi-step pressure reduction reclaims a recovery method for the device of hot waste water waste heat, and the method step is as follows:
temperature enters first order vacuum flashing device higher than the hot waste water of 70 DEG C from the hot waste water distributor of multi-step pressure reduction tower; Temperature to be heated passes through Venturi transmission ejector lower than the low-temperature wastewater of 60 DEG C with 1-5m/s flow velocity, the low-pressure steam produced in suction multi-step pressure reduction tower third level vacuum flashing device, waste water and steam, low-temperature wastewater temperature improves 10-50 DEG C and flows into multi-step pressure reduction tower bottom first order blender;
waste water in first order blender, through waste water circulation pump, with 1-5m/s flow velocity by Venturi transmission ejector, aspirates the low-pressure steam that second level pressure reduction stage flash vessel produces, waste water and steam, and wastewater temperature improves 10-50 DEG C and enters the second level, tower bottom blender; 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 through waste water circulation pump, pass through at Venturi transmission ejector with 1-5m/s flow velocity, the low-pressure steam that suction multi-step pressure reduction tower first order vacuum flashing device produces, waste water and steam, wastewater temperature improves 10-50 DEG C and enters 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 in blender at the bottom of tower after heating flows out from delivery port, enters next process workshop section; The hot waste water after heat treatment is reclaimed in vacuum flashing, flows out, send treatment and finishing section from the sewage draining exit of third level vacuum flashing device bottom.
beneficial effect of the present invention:
the present invention proposes the heat recovering process adopting the method for multi-step pressure reduction flash distillation to carry out high temperature sewage, hot waste water is through multi-step pressure reduction flash distillation, contained high temperature sensible heat is converted into saturated vapor latent heat step by step, Venturi transmission ejector provides the vacuum needed for flash distillation, saturated vapor mixes with waste water to be heated in Venturi transmission ejector simultaneously, heating low-temperature wastewater is to certain temperature, thus reach recovery waste water residual heat, reduce the object of the energy consumption of heated waste water, reduce unit sewage disposal energy consumption 30-80%.
the present invention adopts the mode of step heat exchange of flash evaporation, realizes the heat exchange of high temperature sewage and pretreating sewage, solves the shortcoming that usual heat exchanger reclaims the easy fouling and clogging of pipeline in heat process; The main equipment of invention is the Low Pressure Flashing Column with multistage flash evaporation function, and this 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 section, and the progression of flash zone and mixing section can set according to technological requirement; The sensible heat of hot waste water, in conjunction with the suction of Venturi transmission ejector and immixture, is converted into the latent heat of saturated vapor, heats pending low-temperature sewage, reach energy-saving and cost-reducing by flash column step by step, and the object that system investments is low, stable.
the present invention adopts multi-step pressure reduction flash evaporation to reclaim the sensible heat of high temperature sewage, and low-pressure steam cleans, and process heat exchange efficiency is high; The pollutant that hot waste water vacuum flashing temperature-fall period is separated out can be discharged along down-comer, not easily causes the blocking of pipeline, realizes the long-period stable operation of equipment; Multistage flash evaporator and blender are combined in a tower, and compact equipment, floor space are little; Operation controls simple, and production capacity is large.
the present invention is suitable for the processing procedure processing Coal Chemical Industry high-temperature wash waste water, in stripping deamination depickling-extracting and dephenolizing technical process, can effectively reclaim high temperature sewage, reduce System steam consumption, realize macrocyclic stable operation, for the energy-saving and cost-reducing of coal chemical industrial waste water processing procedure provides feasible technology path, also can be used for petrochemical industry, printing and dyeing, the sewage disposal process of the industries such as papermaking, be particularly useful for the solubility salt containing high concentration, flocculate, organic matter, be easy to low temperature precipitation and cause pipeline scale, the energy recovery process of the hot industry waste water of blocking, alternative common pipe heat exchanger, reduce unit sewage disposal energy consumption more than 50%, there is heat recovery efficiency high, the advantage of long-period stable operation.
accompanying drawing illustrates:
accompanying drawing 1 is process chart of the present invention.
accompanying drawing 2 is structural representations of multi-step pressure reduction tower of the present invention.
detailed description of the invention:
embodiment 1:
a kind of multi-step pressure reduction reclaims the device of hot waste water waste heat, its composition comprises: multi-step pressure reduction tower 1, is provided with one-level vacuum flashing device 4, second depressurized flash vessel 5, three grades of vacuum flashing devices 6, one-level blender 7, secondary mixer 8, three grades of blenders 9 in described multi-step pressure reduction tower from top to bottom successively; The top of described one-level, secondary, three grades of vacuum flashing devices is provided with foam removal broken bubble plate 10, and bottom is provided with flash vessel column plate 11, is provided with saturated vapor outlet 12 above described foam removal broken bubble plate; Separated by dividing plate 13 between described one-level, secondary, three grades of blenders, top is provided with heated waste water import 14, and bottom is provided with heated waste water outlet 15; Described saturated vapor outlet, described heated waste water import are connected with Venturi transmission ejector 2, and described heated waste water outlet is connected with described Venturi transmission ejector by waste water circulation pump 3.
embodiment 2:
multi-step pressure reduction according to embodiment 1 reclaims the device of hot waste water waste heat, and be provided with hot waste water distributor 16 in described one-level vacuum flashing device, 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, and the bottom of the flash vessel column plate in described one-level, second depressurized 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, and the flash vessel column plate bottom in three grades of described vacuum flashing devices 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, and described hot waste water distributor 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 broken bubble plate can be porous plate, silk screen or packing layer.
embodiment 7:
multi-step pressure reduction according to embodiment 1 or 2 reclaims the device of hot waste water waste heat, and the flash vessel in described multi-step pressure reduction tower and the progression of blender can be set as 1-6 level according to technological requirement.
embodiment 8:
a recovery method for the device of the multi-step pressure reduction recovery hot waste water waste heat that one of embodiment 1-7 is described, the method step is as follows:
temperature enters first order vacuum flashing device higher than the hot waste water of 70 DEG C from the hot waste water distributor of multi-step pressure reduction tower; Temperature to be heated passes through Venturi transmission ejector lower than the low-temperature wastewater of 60 DEG C with 1-5m/s flow velocity, the low-pressure steam produced in suction multi-step pressure reduction tower third level vacuum flashing device, waste water and steam, low-temperature wastewater temperature improves 10-50 DEG C and flows into multi-step pressure reduction tower bottom first order blender;
waste water in first order blender, through waste water circulation pump, with 1-5m/s flow velocity by Venturi transmission ejector, aspirates the low-pressure steam that second level pressure reduction stage flash vessel produces, waste water and steam, and wastewater temperature improves 10-50 DEG C and enters the second level, tower bottom blender; 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 through waste water circulation pump, pass through at Venturi transmission ejector with 1-5m/s flow velocity, the low-pressure steam that suction multi-step pressure reduction tower first order vacuum flashing device produces, waste water and steam, wastewater temperature improves 10-50 DEG C and enters 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 in blender at the bottom of tower after heating flows out from delivery port, enters next process workshop section; The hot waste water after heat treatment is reclaimed in vacuum flashing, flows out, send treatment and finishing section from the sewage draining exit of third level vacuum flashing device bottom.
embodiment 9:
multi-step pressure reduction described in embodiment reclaims device and the recovery method thereof of hot waste water waste heat, multi-step pressure reduction tower diameter 0.4m, height overall 15m; Wherein, flash zone height 9m, is divided into three grades of flash distillations, mixing section 6m, is divided into three grades of blenders; Coal plant's gasifier gas wash water, after the depickling of pressurization stripping deamination, discharges high temperature sewage temperature 150-160 DEG C, flow 20t/h at the bottom of stripper tower; Pretreating sewage temperature 20-25 DEG C to be heated, flow 30t/h; The operating pressure of three grades of flash vessels of multi-step pressure reduction tower is respectively: primary flash device operating pressure 0.08 ~ 0.12MPa(G), two-stage flash device operating pressure 0.02 ~-0.02MPa(G), three grades of flash vessel operating pressure-0.06 ~-0.08MPa(G).
embodiment 10:
multi-step pressure reduction described in embodiment reclaims device and the recovery method thereof of hot waste water waste heat, the hot waste water temperature 150-160 DEG C discharged bottom stripper, flow 20t/h, vacuum tower first order flash vessel is entered, primary flash section operating pressure 0.1MPa(G) from multi-step pressure reduction tower tower distributor; Pending low-temperature wastewater temperature 20-30 DEG C, flow 30t/h, flow velocity 1-2m/s passes through Venturi transmission ejector, the low-pressure steam that suction vacuum tower third level flash vessel produces, keep third level flash vessel operating pressure-0.08MPa(G), waste water and steam, wastewater temperature improves 15-20 DEG C of inflow vacuum tower bottom first order blender; Waste water in first order blender is through waste water circulation pump, flow velocity 1-2m/s passes through at Venturi transmission ejector, the low-pressure steam that suction vacuum tower two-stage flash device produces, keep second level flash vessel operating pressure 0.01MPa(G), waste water and steam, wastewater temperature improves 15-20 DEG C and enters the second level, vacuum tower bottom blender; The saturation water of second level flash vessel flows into third level flash vessel by down-comer; Waste water in the blender of the second level is through waste water circulation pump, pass through at Venturi transmission ejector with 1-2m/s flow velocity, the low-pressure steam that suction vacuum tower first order flash vessel produces, keep primary flash device operating pressure 0.1MPa(G), waste water and steam, wastewater temperature improves 10-15 DEG C and enters vacuum tower bottoms third level blender; The saturation water of first order flash vessel flows into second level flash vessel by down-comer; Waste water in blender at the bottom of tower after heating flows out from delivery port, wastewater temperature 60-70 DEG C, enters next process workshop section; Hot waste water temperature after vacuum flashing process is reduced to 60 DEG C, flows out, send treatment and finishing section from the sewage draining exit of third level flash vessel bottom.
embodiment 11:
multi-step pressure reduction described in embodiment reclaims device and the recovery method thereof of hot waste water waste heat, coal plant's gasifier gas wash water, after the depickling of pressurization stripping deamination, discharges high temperature sewage temperature 140-150 DEG C, flow 25t/h at the bottom of stripper tower; Pretreating sewage temperature 20-30 DEG C to be heated, flow 30t/h; The operating pressure of three grades of flash vessels in multi-step pressure reduction tower is respectively: primary flash device operating pressure 0.02MPa(G), two-stage flash device operating pressure-0.02MPa(G), three grades of flash vessel operating pressure-0.09MPa(G); The heated waste water temperature 80-85 DEG C that tower bottom flow goes out, enters next process workshop section; Hot waste water temperature after vacuum flashing process is reduced to 50 DEG C, send treatment and finishing section.
embodiment 12:
multi-step pressure reduction described in embodiment reclaims device and the recovery method thereof of hot waste water waste heat, the high-temperature high-pressure waste water that chemical plant produces, wastewater temperature 180-200 DEG C, flow 10t/h; Pretreating sewage temperature 20-30 DEG C to be heated, flow 30t/h; The operating pressure of three grades of flash zones in multi-step pressure reduction tower is respectively: primary flash device operating pressure 0.1MPa(G), two-stage flash device operating pressure-0.01MPa(G), three grades of flash vessel operating pressure-0.08MPa(G); The heated waste water temperature 65-70 DEG C that tower bottom flow goes out, enters next process workshop section; Hot waste water temperature after vacuum flashing process is reduced to 60 DEG C, send treatment and finishing section.
embodiment 13:
multi-step pressure reduction described in embodiment reclaims device and the recovery method thereof of hot waste water waste heat, the high-temperature high-pressure waste water that chemical plant produces, wastewater temperature 110-120 DEG C, flow 30t/h; Pretreating sewage temperature 20-30 DEG C to be heated, flow 30t/h; The operating pressure of three grades of flash zones in multi-step pressure reduction tower is respectively: primary flash device operating pressure-0.01MPa(G), two-stage flash device operating pressure-0.04MPa(G), three grades of flash vessel operating pressure-0.08MPa(G); The heated waste water temperature 70-75 DEG C that tower bottom flow goes out, enters next process workshop section; Hot waste water temperature after vacuum flashing process is reduced to 60 DEG C, send treatment and finishing section.
Claims (8)
1. the device of a multi-step pressure reduction recovery hot waste water waste heat, its composition comprises: multi-step pressure reduction tower, is characterized in that: be provided with one-level vacuum flashing device, second depressurized flash vessel, three grades of vacuum flashing devices, one-level blender, secondary mixer, three grades of blenders in described multi-step pressure reduction tower from top to bottom successively; The top of described one-level, secondary, three grades of vacuum flashing devices is provided with foam removal broken bubble plate, and bottom is provided with flash vessel column plate, is provided with saturated vapor outlet above described foam removal broken bubble plate; Separated by dividing plate between described one-level, secondary, three grades of blenders, top is provided with heated waste water import, and bottom is provided with heated waste water outlet; Described saturated vapor outlet, described heated waste water import are connected with Venturi transmission ejector, and described heated waste water outlet is connected with described Venturi transmission ejector by waste water circulation pump.
2. multi-step pressure reduction according to claim 1 reclaims the device of hot waste water waste heat, it is characterized in that: be provided with hot waste water distributor in described one-level vacuum flashing device, described hot waste water distributor is connected with hot waste water import.
3. multi-step pressure reduction according to claim 1 and 2 reclaims the device of hot waste water waste heat, it is characterized in that: the bottom of the flash vessel column plate in described one-level, second depressurized flash vessel is connected with down-comer.
4. the multi-step pressure reduction according to claim 1 or 2 or 3 reclaims the device of hot waste water waste heat, it is characterized in that: the flash vessel column plate bottom in three grades of described vacuum flashing devices is provided with high temperature sewage draining exit.
5. the multi-step pressure reduction according to claim 1 or 2 or 3 or 4 reclaims the device of hot waste water waste heat, it is characterized in that: described hot waste water distributor is shower nozzle and/or antipriming pipe, pressure drop 1-20KPa.
6. multi-step pressure reduction according to claim 1 or 2 or 3 or 4 or 5 reclaims the device of hot waste water waste heat, it is characterized in that: described foam removal broken bubble plate is porous plate or silk screen or packing layer.
7. the multi-step pressure reduction according to claim 1 or 2 or 3 or 4 or 5 or 6 reclaims the device of hot waste water waste heat, it is characterized in that: the flash vessel in described multi-step pressure reduction tower and the progression of blender are set as 1-6 level according to technological requirement.
8. the multi-step pressure reduction utilizing one of claim 1-7 described reclaims a recovery method for the device of hot waste water waste heat, it is characterized in that: the method step is as follows:
Temperature enters first order vacuum flashing device higher than the hot waste water of 70 DEG C from the hot waste water distributor of multi-step pressure reduction tower; Temperature to be heated passes through Venturi transmission ejector lower than the low-temperature wastewater of 60 DEG C with 1-5m/s flow velocity, the low-pressure steam produced in suction multi-step pressure reduction tower third level vacuum flashing device, waste water and steam, low-temperature wastewater temperature improves 10-50 DEG C and flows into multi-step pressure reduction tower bottom first order blender;
Waste water in first order blender, through waste water circulation pump, with 1-5m/s flow velocity by Venturi transmission ejector, aspirates the low-pressure steam that second level pressure reduction stage flash vessel produces, waste water and steam, and wastewater temperature improves 10-50 DEG C and enters the second level, tower bottom blender; 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 through waste water circulation pump, pass through at Venturi transmission ejector with 1-5m/s flow velocity, the low-pressure steam that suction multi-step pressure reduction tower first order vacuum flashing device produces, waste water and steam, wastewater temperature improves 10-50 DEG C and enters 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 in blender at the bottom of tower after heating flows out from delivery port, enters next process workshop section; The hot waste water after heat treatment is reclaimed in vacuum flashing, flows out, send treatment and finishing section from the sewage draining exit of third level vacuum flashing device bottom.
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| 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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| 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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| CN104595877B CN104595877B (en) | 2017-09-29 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107619694A (en) * | 2017-11-02 | 2018-01-23 | 兖矿集团有限公司 | A kind of digestion system and method for preparing ultra-clean coal |
| CN108249499A (en) * | 2018-03-12 | 2018-07-06 | 山东中移能节能环保科技股份有限公司 | The method and device concentrated using hot industry waste water to high-salt wastewater low-temperature evaporation |
| CN110627289A (en) * | 2019-10-28 | 2019-12-31 | 中国华电科工集团有限公司 | Low-temperature flue gas heating wastewater concentration system |
| CN110746024A (en) * | 2019-10-28 | 2020-02-04 | 中国华电科工集团有限公司 | Concentrated waste heat retrieval and utilization device of low temperature economizer waste water |
| CN110746025A (en) * | 2019-10-28 | 2020-02-04 | 中国华电科工集团有限公司 | Low-temperature negative-pressure wastewater zero discharge system |
| 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 |
| CN113018889A (en) * | 2021-05-28 | 2021-06-25 | 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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| CN204420957U (en) * | 2015-01-16 | 2015-06-24 | 王伟东 | Multi-step pressure reduction reclaims the device of hot waste water waste heat |
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| CN107619694A (en) * | 2017-11-02 | 2018-01-23 | 兖矿集团有限公司 | A kind of digestion system and method for preparing ultra-clean coal |
| CN107619694B (en) * | 2017-11-02 | 2023-12-08 | 山东能源集团有限公司 | Digestion system and method for preparing ultra-clean coal |
| CN108249499A (en) * | 2018-03-12 | 2018-07-06 | 山东中移能节能环保科技股份有限公司 | The method and device concentrated using hot industry waste water to high-salt wastewater low-temperature evaporation |
| CN110627289A (en) * | 2019-10-28 | 2019-12-31 | 中国华电科工集团有限公司 | Low-temperature flue gas heating wastewater concentration system |
| CN110746024A (en) * | 2019-10-28 | 2020-02-04 | 中国华电科工集团有限公司 | Concentrated waste heat retrieval and utilization device of low temperature economizer waste water |
| CN110746025A (en) * | 2019-10-28 | 2020-02-04 | 中国华电科工集团有限公司 | Low-temperature negative-pressure wastewater zero discharge system |
| 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 |
| CN113018889A (en) * | 2021-05-28 | 2021-06-25 | 东营联合石化有限责任公司 | Heat exchange device for reflux of middle section of pressure reduction tower |
| 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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