CN102992427B - Wastewater zero-discharge treatment system - Google Patents

Wastewater zero-discharge treatment system Download PDF

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Publication number
CN102992427B
CN102992427B CN 201210541019 CN201210541019A CN102992427B CN 102992427 B CN102992427 B CN 102992427B CN 201210541019 CN201210541019 CN 201210541019 CN 201210541019 A CN201210541019 A CN 201210541019A CN 102992427 B CN102992427 B CN 102992427B
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CN
China
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mine
effect
described
waste
low
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CN 201210541019
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Chinese (zh)
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CN102992427A (en
Inventor
唐刚
陈辉
朱铭
唐文文
朱佳裔
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众和海水淡化工程有限公司
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Abstract

The invention provides a wastewater zero-discharge treatment system for mines and mine, which is composed of a waste-gas waste-heat utilization system, a low-temperature multi-effect horizontal pipe distillation system and an evaporative crystallization system, wherein the low-temperature multi-effect horizontal pipe distillation system is a MED (Multi-Effect Distillation) system; the waste-gas waste-heat utilization system comprises a combustion gas turbine capable of combusting gas to discharge high-temperature smoke, and a waste-heat boiler making use of the waste heat of the high-temperature smoke so as to obtain high-temperature steam; the low-temperature multi-effect horizontal pipe distillation system comprises a low-temperature multi-effect evaporator and a condenser; and the evaporation crystallization system comprises a stand-pipe falling-film evaporator making use of the high-temperature steam to purify wastewater of mines and mine and a drying device. The wastewater zero-discharge treatment system disclosed by the invention has the beneficial effects that low-grade energy can be used as a heating source to realize multiple reutilization of heat, so that distillation consumption is reduced greatly; and the concentration of brackish water is realized, so that crystallized salt is separated from distilled water and the zero discharge of the brackish water is realized.

Description

A kind of mine waste water of mine zero discharge treatment system

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 mine waste water of mine.

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 mine waste water of mine zero discharge treatment system, and especially being fit to has the mine mine, the environment that also has the pit water of a large amount of high pollutions to handle simultaneously.

For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of mine waste water of mine 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 whizzer that utilizes described high-temperature steam desalination mine waste water of mine.

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, waste water of mine pretreatment unit in mine is arranged on the mine waste water of mine 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, 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 mine of the present invention waste water of mine zero discharge treatment system schematic

Fig. 2 is the schematic flow sheet of the hybrid mine of multiple-effect of the present invention waste water of mine vaporizer

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, mine 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 mine waste water of mine 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 whizzer that utilizes described high-temperature steam desalination mine waste water of mine;

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.

Mine waste water of mine pretreatment unit is arranged on the mine waste water of mine 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.

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 mine 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 the mine 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 mine of multiple-effect waste water of mine vaporizer 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 mine waste water of mine b:

After the waste water of mine pre-treatment of mine, 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:

The mine 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 (9)

1. mine waste water of mine 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 whizzer that utilizes described high-temperature steam desalination mine waste water of mine;
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. mine according to claim 1 waste water of mine zero discharge treatment system, 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. mine according to claim 1 waste water of mine zero discharge treatment system, it is characterized in that: mine waste water of mine pretreatment unit is arranged on the mine waste water of mine import front end of described low-temperature multi-effect level pipe Distallation systm.
4. mine according to claim 1 waste water of mine zero discharge treatment system, it is characterized in that: waste gas pre-treating device is arranged on described gas turbine inlet air mouth front end.
5. mine according to claim 1 waste water of mine zero discharge treatment system, 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. mine according to claim 1 waste water of mine zero discharge treatment system, 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. mine according to claim 1 waste water of mine zero discharge treatment system is characterized in that: on the gas side pipe road of described low-temperature multi-effect level pipe Distallation systm vacuum pump is set.
8. mine according to claim 2 waste water of mine zero discharge treatment system is characterized in that: imitate vertical tube gas-liquid separator and described second with described first 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 imitate the vertical tube gas-liquid separator and link to each other.
9. mine according to claim 1 waste water of mine zero discharge treatment system, it is characterized in that: described internal combustion turbine connects generator.
CN 201210541019 2012-12-12 2012-12-12 Wastewater zero-discharge treatment system CN102992427B (en)

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US10288348B2 (en) 2014-01-10 2019-05-14 Compass Minerals America Inc. Method of drying salt and similar materials through the use of heat engine waste heat
CN104710069B (en) * 2015-03-18 2017-01-11 中国恩菲工程技术有限公司 Method for recycling waste heat power generation tail steam in smelting plant
CN105275616A (en) * 2015-10-27 2016-01-27 首钢京唐钢铁联合有限责任公司 Combined heat, water and power system
CN107098423A (en) * 2017-05-18 2017-08-29 北京必可测科技股份有限公司 A kind of method for the high-salinity wastewater zero-emission for making to produce in industrial production
CN108751230A (en) * 2018-05-30 2018-11-06 新奥泛能网络科技有限公司 Distributed energy resource system based on vacuum process and its control method

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