CN203033785U - Zero-discharge waste water treatment system - Google Patents
Zero-discharge waste water treatment system Download PDFInfo
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- CN203033785U CN203033785U CN2012206868781U CN201220686878U CN203033785U CN 203033785 U CN203033785 U CN 203033785U CN 2012206868781 U CN2012206868781 U CN 2012206868781U CN 201220686878 U CN201220686878 U CN 201220686878U CN 203033785 U CN203033785 U CN 203033785U
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A20/124—Water desalination
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Abstract
The utility model provides a zero-discharge waste water treatment system which comprises a utilization system for waste heat of waste gas, a low-temperature multiple-effect distillation system with horizontal tubes and an evaporative crystallization system. The low-temperature multiple-effect distillation system with the horizontal tubes is an MED (multiple-effect distillation) system; the utilization system for the waste heat of the waste gas comprises a gas turbine and a waste heat boiler, and combustible gas can be combusted by the gas turbine, so that high-temperature flue gas can be discharged by the gas turbine, and the waste heat boiler is used for generating high-temperature steam by the aid of waste heat of the high-temperature flue gas; and the low-temperature multiple-effect distillation system with the horizontal tubes comprises a low-temperature multiple-effect evaporator and a condenser. The evaporative crystallization system comprises a vertical tube falling-film evaporator and a drying device, and the vertical tube falling-film evaporator is used for desalinating waste water by the aid of the high-temperature steam. The zero-discharge waste water treatment system has the advantages that low-quality energy can be utilized as a heating source, heat can be reused, and energy consumption for distillation is greatly reduced; and brackish water can be concentrated, so that crystallized salt can be separated from distilled water, and the brackish water is prevented from being discharged.
Description
Technical field
The invention belongs to field of waste water treatment, the coupling that especially relates to a kind of low-temperature multi-effect evaporation and vertical tube falling film evaporation process realizes the technological method of the zero release of waste water.
Background technology
At present, pit water in the colliery, the trade effluent in the chemical enterprise adopt vertical tube falling film evaporation technology more, the heat transfer temperature difference of this technology single-effect evaporator will be more than 15 ℃, usually to guarantee 20 ℃, for utilizing 0.5MPa, 140 ℃ steam source, the vaporizer of vertical tube falling film evaporation are imitated number and are adopted 2 to imitate usually, at most also be no more than 4 and imitate, so its evaporation energy consumption is higher.The low-temperature multi-effect vaporizer has the characteristics of little different transfer of heat, can in 50 ℃-66 ℃ temperature range, arrange multiple-effect evaporator, realization is to the recycling of steam heat, so the multiple-effect waste water vaporizer technology that the low-temperature multi-effect vaporizer is combined with the vertical tube falling-film evaporator is to realize reducing the effective way of waste water evaporation energy consumption, namely utilize the end to imitate the secondary steam that goes out of use usually of vertical tube falling-film evaporator generation as the heating steam of low-temperature multi-effect vapo(u)rization system, after waste water is concentrated in the low-temperature multi-effect vapo(u)rization system, concentrated waste water after most of moisture wherein is evaporated has reduced the high pressure steam that consumes in the vertical tube falling-film evaporator significantly as the feed water of vertical tube falling-film evaporator.
Summary of the invention
The problem to be solved in the present invention provides a kind of wastewater zero discharge treatment system, and especially being fit to has the mine mine, the environment that the while also has the pit water of a large amount of high pollutions to handle.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of wastewater zero discharge treatment system, system is made of waste gas heat utilization system, low-temperature multi-effect level pipe Distallation systm and evaporation and crystallization system, and low-temperature multi-effect level pipe Distallation systm is the MED system.
Thereby described waste gas heat utilization system comprises the internal combustion turbine of burning combustible gas discharging high-temperature flue gas, thereby and utilizes the waste heat of described high-temperature flue gas to obtain the waste heat boiler of high-temperature steam.
Described low-temperature multi-effect level pipe Distallation systm comprises low-temperature multi-effect vaporizer and condenser.
Described evaporation and crystallization system comprises vertical tube falling-film evaporator and the drying installation that utilizes described high-temperature steam desalination waste water.
The vapour outlet of described waste heat boiler is connected with the steam-in of described vertical tube falling-film evaporator, and the vapour outlet of described vertical tube falling-film evaporator links to each other with the steam-in of described low-temperature multi-effect level pipe Distallation systm.
The condensation-water drain of described vertical tube falling-film evaporator and low-temperature multi-effect level pipe Distallation systm links to each other with the condensing water inlet of described waste heat boiler.
Further, described vertical tube falling-film evaporator is the two-effect evaporation device, comprises that the first effect vertical tube vaporizer, first that connects is in turn imitated gas-liquid separator, the second effect vertical tube vaporizer and second is imitated gas-liquid separator; Described low-temperature multi-effect vaporizer is the quadruple effect horizontal tube evaporator, comprises the effect horizontal tube evaporator, two effect horizontal tube evaporator, triple effect horizontal tube evaporator and the quadruple effect horizontal tube evaporators that connect in turn.
Further, sewage pretreatment device is arranged on the waste water import front end of described low-temperature multi-effect level pipe Distallation systm.
Further, waste gas pre-treating device is arranged on described gas turbine inlet air mouth front end.
Further, described vertical tube falling-film evaporator and described low-temperature multi-effect level pipe Distallation systm are equipped with cooling water inlet and cooling water outlet.
Further, described vertical tube falling-film evaporator and described low-temperature multi-effect level pipe Distallation systm are equipped with the distilled water water outlet.
Further, described drying installation is whizzer.
Further, on the gas side pipe road of described low-temperature multi-effect level pipe Distallation systm vacuum pump is set.
Further, imitating the vertical tube gas-liquid separator with the described first effect vertical tube gas-liquid separator and described second of described vertical tube falling-film evaporator respectively after the material water outlet pipeline of each single-effect evaporator of described low-temperature multi-effect level pipe Distallation systm and condenser merges links to each other.
Further, described internal combustion turbine connects generator.
Advantage and positively effect that the present invention has are: owing to adopt technique scheme, can utilize inferior energy as the heating thermal source, realize the repeatedly recycling of heat, reduce the distillation energy consumption significantly; Realized the concentrating of brackish water, made the zero release of the separating of crystal salt and distilled water, brackish water.
Description of drawings
Fig. 1 is wastewater zero discharge treatment system synoptic diagram of the present invention
Fig. 2 is the schematic flow sheet of the hybrid waste water vaporizer of multiple-effect of the present invention
Among the figure:
1, vertical tube falling-film evaporator 2, low-temperature multi-effect level pipe Distallation systm
11, first imitate vertical tube vaporizer 12, the first effect vapor-liquid separation chamber
13, second imitate vertical tube vaporizer 14, the second effect vapor-liquid separation chamber
21,1 single- effect evaporator 22,2 single-effect evaporators
23,3 single-effect evaporators 24,4 single-effect evaporators
25, condenser 3, gas side pipe road
4, material supply mains 5, water of condensation house steward
A, steam b, waste water of mine
B ' material water b " crystal salt
C, water of condensation d, distilled water
E, water coolant
Embodiment
As shown in Figure 1, the present invention introduces a kind of wastewater zero discharge treatment system, and system is made of waste gas heat utilization system, low-temperature multi-effect level pipe Distallation systm 2 and evaporation and crystallization system, and low-temperature multi-effect level pipe Distallation systm is the MED system;
Described waste gas heat utilization system comprises burning combustible gas Sweet natural gases such as () methane thereby the internal combustion turbine of discharging high-temperature flue gas, thereby and utilize the waste heat of described high-temperature flue gas to obtain the waste heat boiler of high-temperature steam;
Described low-temperature multi-effect level pipe Distallation systm comprises low-temperature multi-effect vaporizer and condenser 25.
Described evaporation and crystallization system comprises vertical tube falling-film evaporator 1 and the drying installation that utilizes described high-temperature steam desalination waste water;
The vapour outlet of described waste heat boiler is connected with the steam-in of described vertical tube falling-film evaporator 1, and the vapour outlet of described vertical tube falling-film evaporator 1 links to each other with the steam-in of described low-temperature multi-effect level pipe Distallation systm 2;
The condensation-water drain of described vertical tube falling-film evaporator 1 and low-temperature multi-effect level pipe Distallation systm 2 links to each other with the condensing water inlet of described waste heat boiler.
Described vertical tube falling-film evaporator is the two-effect evaporation device, comprises that the first effect vertical tube vaporizer 11, first that connects is in turn imitated gas-liquid separator 12, the second effect vertical tube vaporizer 13 and second is imitated gas-liquid separator 14; Described low-temperature multi-effect vaporizer is the quadruple effect horizontal tube evaporator, comprises the effect horizontal tube evaporator 21, two effect horizontal tube evaporator 22, triple effect horizontal tube evaporator 23 and the quadruple effect horizontal tube evaporators 24 that connect in turn.
Sewage pretreatment device is arranged on the waste water import front end of described low-temperature multi-effect level pipe Distallation systm.
Waste gas pre-treating device is arranged on described gas turbine inlet air mouth front end.
Described vertical tube falling-film evaporator and described low-temperature multi-effect level pipe Distallation systm are equipped with cooling water inlet and cooling water outlet.
Described vertical tube falling-film evaporator and described low-temperature multi-effect level pipe Distallation systm are equipped with the distilled water water outlet.
Described drying installation is whizzer.
On the gas side pipe road 3 of described low-temperature multi-effect level pipe Distallation systm vacuum pump is set.
The material water outlet pipeline of each single-effect evaporator of described low-temperature multi-effect level pipe Distallation systm and condenser links to each other with the described first effect vertical tube gas-liquid separator and the described second effect vertical tube gas-liquid separator of described vertical tube falling-film evaporator respectively after merging into material supply mains 4.
Described internal combustion turbine connects generator.
Embodiments of the invention: there is a large amount of mines mine in Australia, also has the pit water of a large amount of high pollutions to need to handle simultaneously.In conjunction with local practical situation, we have done the technical scheme that brand-new pit water is handled.
The overall goal that waste water of mine (20 ℃ of temperature, concentration 15000ppm) is handled is zero release.In general, the MED system can be concentrated to 60000ppm to waste water of mine from 15000ppm, and recycling rises film and steams the slide system, and saturated or oversaturated dense water obtains crystal salt b through the whizzer oven dry.
Because there is abundant methane resource on this ground, we select gas turbine, generating can be used for mine industry on the one hand, in addition, high-temperature flue gas passes through the waste heat boiler recycling, but obtains the thermal source that the heat supply Distallation systm utilizes, be that waste heat boiler provides elevated pressures (middle pressure steam, 0.7MPa about) steam a, steam a is as the thermal source of evaporation and crystallization system, and the vertical tube falling-film evaporator can produce back pressure steam (70 ℃ saturated gases) as the thermal source of low-temperature multi-effect vaporizer (MED system).
The flow process of the hybrid waste water vaporizer of multiple-effect is imitated vertical tube falling-film evaporator two portions by quadruple effect horizontal pipe falling film evaporation device and two and is formed as shown in Figure 2.
Introduce the mobility status of each material in the system below.
Steam a flow process:
Two imitate secondary steam in the vertical tube falling-film evaporators enters in the heat-transfer pipe of first single-effect evaporator and be condensed into water in pipe as heating steam, be discharged to outside the vaporizer, manage outer material water evaporation, and the generation secondary steam enters next effect heat-transfer pipe.Evaporation, condensation process repeat in each single-effect evaporator, and the secondary steam of the generation in the last evaporator is condensed by material water in condenser.
The flow process of waste water of mine b:
After the waste water of mine pre-treatment, at first enter the MED system, become denseer salt solution through after concentrating, enter evaporation and crystallization system then, further concentrate, become saturated solution after, advanced centrifugal device, become crystal salt b ".
The flow process of material water b ':
Parallel each that enters into vaporizer imitated material water is finished preheating in condenser after.After material water enters vaporizer, be evenly distributed to through liquid distributor in the tube bank of vaporizer, material water is managed interior steam heating and is produced the part evaporation, the secondary steam that generates enters behind vapour liquid separator in the pipe of next single-effect evaporator as heating steam, remaining material water enters down flash distillation in the 1st effective evaporator by imitating, and the material water after concentrated is separating device in the minimum last evaporator of temperature.
The flow process of water of condensation c:
The steam of waste heat boiler enters evaporation and crystallization system, and the water of condensation of vapor condenses is got back to boiler, as the material make up water of boiler.
The flow process of distilled water d:
MED system and evaporation and crystallization system can both produce distilled water, as product fresh water.
The flow process of water coolant e:
Waste water of mine can be used as water coolant.When summer or pit water temperature were higher, MED system and evaporation and crystallization system then all needed certain water coolant.Water coolant is after system uses, and discharging is returned.
The gas side flow process:
In order to guarantee that each single-effect evaporator and condenser can steady runnings, the vapour side of evaporator room and the condenser of each single-effect evaporator need be connected with vacuum pump by gas side pipe road, thereby a small amount of non-condensable gas that evaporative process produces is extracted out.
Two imitate vertical tube falling film evaporation flow process:
High pressure steam enters into one and imitates heating chamber.Bittern after heating chamber is heated evaporates a large amount of saturated vapors in evaporator room, these secondary saturated vapors enter down effect evaporating pot heating chamber, following effect evaporating pot heating chamber plays a part last effect steam condenser, while vapor condensation Cheng Shui, each water of condensation c of imitating produces secondary steam through the flasher shwoot and enters second effect, and second secondary steam of imitating is as the heating steam of first single-effect evaporator of multiple-effect horizontal pipe falling film evaporation.The parallel vertical tube falling-film evaporator that enters into of material water b ' after the multiple-effect horizontal pipe falling film evaporation device concentrates further concentrates.
More than one embodiment of the present of invention are had been described in detail, but described content only is preferred embodiment of the present invention, can not be considered to for limiting practical range of the present invention.All equalizations of doing according to the present patent application scope change and improve etc., all should still belong within the patent covering scope of the present invention.
Claims (10)
1. wastewater zero discharge treatment system, it is characterized in that: system is made of waste gas heat utilization system, low-temperature multi-effect level pipe Distallation systm and evaporation and crystallization system, and low-temperature multi-effect level pipe Distallation systm is the MED system;
Thereby described waste gas heat utilization system comprises the internal combustion turbine of burning combustible gas discharging high-temperature flue gas, thereby and utilize the waste heat of described high-temperature flue gas to obtain the waste heat boiler of high-temperature steam;
Described low-temperature multi-effect level pipe Distallation systm comprises low-temperature multi-effect vaporizer and condenser;
Described evaporation and crystallization system comprises vertical tube falling-film evaporator and the drying installation that utilizes described high-temperature steam desalination waste water;
The vapour outlet of described waste heat boiler is connected with the steam-in of described vertical tube falling-film evaporator, and the vapour outlet of described vertical tube falling-film evaporator links to each other with the steam-in of described low-temperature multi-effect level pipe Distallation systm;
The condensation-water drain of described vertical tube falling-film evaporator and low-temperature multi-effect level pipe Distallation systm links to each other with the condensing water inlet of described waste heat boiler.
2. wastewater zero discharge treatment system according to claim 1, it is characterized in that: described vertical tube falling-film evaporator is the two-effect evaporation device, comprises that the first effect vertical tube vaporizer, first that connects is in turn imitated gas-liquid separator, the second effect vertical tube vaporizer and second is imitated gas-liquid separator; Described low-temperature multi-effect vaporizer is the quadruple effect horizontal tube evaporator, comprises the effect horizontal tube evaporator, two effect horizontal tube evaporator, triple effect horizontal tube evaporator and the quadruple effect horizontal tube evaporators that connect in turn.
3. wastewater zero discharge treatment system according to claim 1, it is characterized in that: the waste water import front end of described low-temperature multi-effect level pipe Distallation systm arranges sewage pretreatment device.
4. wastewater zero discharge treatment system according to claim 1, it is characterized in that: the inlet mouth front end of described internal combustion turbine arranges waste gas pre-treating device.
5. wastewater zero discharge treatment system according to claim 1, it is characterized in that: described vertical tube falling-film evaporator and described low-temperature multi-effect level pipe Distallation systm are equipped with cooling water inlet and cooling water outlet.
6. wastewater zero discharge treatment system according to claim 1, it is characterized in that: described vertical tube falling-film evaporator and described low-temperature multi-effect level pipe Distallation systm are equipped with the distilled water water outlet.
7. wastewater zero discharge treatment system according to claim 1, it is characterized in that: described drying installation is whizzer.
8. wastewater zero discharge treatment system according to claim 1 is characterized in that: on the gas side pipe road of described low-temperature multi-effect level pipe Distallation systm vacuum pump is set.
9. wastewater zero discharge treatment system according to claim 2 is characterized in that: imitate the vertical tube gas-liquid separator with the described first effect vertical tube gas-liquid separator and described second of described vertical tube falling-film evaporator respectively after the material water outlet pipeline of each single-effect evaporator of described low-temperature multi-effect level pipe Distallation systm and condenser merges and link to each other.
10. wastewater zero discharge treatment system according to claim 1 is characterized in that: described internal combustion turbine connection generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206868781U CN203033785U (en) | 2012-12-12 | 2012-12-12 | Zero-discharge waste water treatment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012206868781U CN203033785U (en) | 2012-12-12 | 2012-12-12 | Zero-discharge waste water treatment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445480A (en) * | 2014-12-09 | 2015-03-25 | 东北大学 | Process for carrying out sewage treatment and achieving sea water desalination by use of low-temperature exhaust gas waste heat |
| CN111517400A (en) * | 2020-04-24 | 2020-08-11 | 上海发电设备成套设计研究院有限责任公司 | Low-grade heat source coupling multi-effect flash evaporation concentration evaporation system |
-
2012
- 2012-12-12 CN CN2012206868781U patent/CN203033785U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445480A (en) * | 2014-12-09 | 2015-03-25 | 东北大学 | Process for carrying out sewage treatment and achieving sea water desalination by use of low-temperature exhaust gas waste heat |
| CN111517400A (en) * | 2020-04-24 | 2020-08-11 | 上海发电设备成套设计研究院有限责任公司 | Low-grade heat source coupling multi-effect flash evaporation concentration evaporation system |
| CN111517400B (en) * | 2020-04-24 | 2023-02-03 | 上海发电设备成套设计研究院有限责任公司 | Low-grade heat source coupling multi-effect flash evaporation concentration evaporation system |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211210 Address after: No. 641, Jueping street, Zigong, Sichuan Patentee after: DONGFANG BOILER GROUP Co.,Ltd. Address before: 300460 No. 1, Lingang Economic Zone, Binhai New Area, Tianjin Patentee before: ZHONGHE SEAWATER DESALINATION ENGINEERING Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130703 |