CN108423910A - A kind of processing system for realizing high organic wastewater zero-emission with high salt using waste heat - Google Patents
A kind of processing system for realizing high organic wastewater zero-emission with high salt using waste heat Download PDFInfo
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- CN108423910A CN108423910A CN201810472887.2A CN201810472887A CN108423910A CN 108423910 A CN108423910 A CN 108423910A CN 201810472887 A CN201810472887 A CN 201810472887A CN 108423910 A CN108423910 A CN 108423910A
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- dehumidifier
- organic wastewater
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F2001/5218—Crystallization
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
Abstract
The invention discloses a kind of processing systems for realizing high organic wastewater zero-emission with high salt using waste heat, specifically include humidifier, dehumidifier and refrigerating plant, the high organic wastewater with high salt of pending certain temperature is after filtering pre-processes, it sequentially enters the first effect humidifier, the second effect humidifier and third effect humidifier to be concentrated, the Hot wet air heating that the first effect humidifier generates returns to the first effect humidifier after the first effect dehumidifier cool-down dehumidification；The Hot wet air heating that second effect humidifier generates returns to the second effect humidifier after refrigeration equipment cool-down dehumidification；The Hot wet air heating that third effect humidifier generates is immediately discharged to air, and the high organic wastewater with high salt for the nearly saturation state that bottom generates enters crystallization tank, cools down at room temperature, the crystal salt of generation enters desalination treatment process.This system flow is succinct, it is easy to operate, do not add that chemical agent, mass-and heat-transfer are efficient, equipment investment is small, small accommodation area, it is energy-saving, can run steadily in the long term, have a wide range of application.
Description
Technical field
The invention belongs to field of waste water treatment, and in particular to a kind of to realize high organic wastewater zero-emission with high salt using waste heat
Processing system.
Background technology
The waste water that the industries such as petrochemical industry, coal chemical industry, metallurgy, pharmacy, printing and dyeing, papermaking are discharged in process of production has
The characteristics of with high salt, high organic matter, usual salt content is in 3000mg/L or more, and COD is in 2000mg/L or more, and temperature is higher,
Containing the poisonous and hazardous organic matter such as a large amount of aromatic compounds, heterocyclic compound, hydrocarbon compound, even across processing with
After be discharged into water body and still can cause security risk to water environment.
Heat exchange cooling processing, pretreatment, life are generally comprised to the zero-discharge treatment system of high organic wastewater with high salt at present
A series of system units such as change processing, advanced oxidation, sand filtration, ultrafiltration, reverse osmosis, the concentrated water in addition generated to system will also carry out
Oxidation, softening and concentration, finally use evaporation and crystallization system to form solid salt.That there are flows is superfluous for existing zero-discharge treatment system
It is long, complicated for operation, stability is poor, energy reagent consumption is high, take up a large area, operating cost is high, solid salt is because of content of organics
It is high and the shortcomings of be difficult to dispose, it is difficult to operation steady in a long-term, application range are restricted.
The industries such as petrochemical industry, coal chemical industry, metallurgy are in actual production simultaneously, are generated after the heating of fuel, burning useless
Flue gas continues to discharge to air after by main chimney flue summarizing, while flue gas temperature can reach 200 DEG C or more, and flue gas will pass through
Chimney is discharged into the air from pull out force, if these waste heats had both wasted the valuable energy, and also polluted without recycling
Environment.In addition, the UTILIZATION OF VESIDUAL HEAT IN for the waste hot gas that the exhaust steam or other processes in process of factory production generate is also to improve warp
Ji property, a fuel-saving important channel.Therefore it need to take measures to carry out waste heat recovery to flue gas, exhaust steam waste heat etc.
It utilizes, uses it for realizing high organic wastewater Zero discharging system with high salt, can effectively reduce cost.
Invention content
It is an object of the invention to design a kind of processing system for realizing high organic wastewater zero-emission with high salt using waste heat,
It solves the above problems.
To achieve the goals above, the technical solution adopted by the present invention is as follows：
A kind of processing system for realizing high organic wastewater zero-emission with high salt using waste heat, which is characterized in that include the following steps:
Including humidifier, dehumidifier and refrigerating plant；Humidifier quantity is three, and the respectively first effect humidifier, the second effect add
Wet device and third imitate humidifier, and the quantity of dehumidifier is two, the respectively first effect dehumidifier and the second effect dehumidifier；
The pending high organic wastewater with high salt with certain temperature after filtering pre-processes with preheated through First Heat Exchanger
The first effect humidifier circulation fluid mixing, is delivered to the first effect humidifier later, through distributor disperse with from described the
The filler that the air that one effect humidifier bottom enters is imitated by described first inside humidifier carries out counter current contacting；First effect
The saturation Hot wet air heating being discharged at the top of humidifier（Relative humidity RH=100%）Through fan（Or wind turbine）Pressure-increasing unit to the first effect subtracts
Wet device returns again to the first effect humidifier through cool-down dehumidification and recycles；Hot wet air heating condenses production in the first effect dehumidifier
Raw condensed water is through pipelined to battery limit (BL)；
The second effect humidifier circulation fluid delivers into the first effect dehumidifier through pump and carries out heat exchange, institute with Hot wet air heating
The raising of the second effect humidifier circulation fluid temperature is stated, the second effect humidifier circulation fluid is dense with the first effect humidifier discharge
High organic wastewater with high salt after contracting is mixed at the top of the second effect humidifier；
It is described second effect humidifier at the top of enter mixing liquid through distributor disperse with from it is described second effect humidifier bottom into
The air entered imitates humidifier inner stuffing by described second and carries out counter current contacting, is discharged at the top of the second effect humidifier
The Hot wet air heating of saturation（Relative humidity RH=100%）Through fan（Or wind turbine）Supercharging enters refrigerating plant；
The refrigerating plant includes the second effect dehumidifier and refrigeration equipment, and the saturation heat of the second effect humidifier discharge is wet
Air（Relative humidity RH=100%）Through fan（Or wind turbine）Supercharging enters described second and imitates dehumidifier, is saturated Hot wet air heating and institute
The cooling water for stating refrigeration equipment carries out heat exchange, and Hot wet air heating, which enters after cool-down dehumidification in second heat exchanger, to heat up, it
After return again to the second effect humidifier and recycle, Hot wet air heating condenses the condensation of generation in the second effect dehumidifier
Water is exported through pipeline to battery limit (BL)；
High organic wastewater with high salt after the cooling concentration of the second effect humidifier discharge, with third effect humidifier cycle
It is delivered to after liquid mixing at the top of the third effect humidifier, dispersion of the mixing liquid through distributor and third effect humidifier bottom
The air that portion enters imitates humidifier inner stuffing by the third and carries out counter current contacting, from row at the top of third effect humidifier
The Hot wet air heating gone out is fed directly to air；The high organic wastewater with high salt close to saturation of third effect humidifier discharge into
Enter in crystallization tank, cool down at room temperature, the crystal salt generated in the crystallization tank enters desalination treatment process, in the crystallization tank
Coolant liquid through pump be back to third imitate humidifier.
The system flow can be divided into n humidifier（n≥2）With n-1 dehumidifier（n≥2）, the (n-1)th effect humidifier and the
N-1 imitates dehumidifier composition the (n-1)th effect humidification-dehumidification unit（n≥2）, wherein air be closed circulation mode pass in and out humidifier and
Dehumidifier, or open mode, battery limit (BL) air directly imitate humidifier through wind turbine into (n-1)th, then pass through the (n-1)th effect dehumidifier
Air bleeding valve is expelled to battery limit (BL).
The n-1 effect humidification-dehumidification units combine for one or more repetitive units, and the n-th effect humidifier is that independent humidification is single
Member.
Cool-down dehumidification of the refrigerating plant for Hot wet air heating in the dehumidifier of (n-1)th effect humidification-dehumidification unit.
High organic wastewater with high salt enters at the top of the n-th effect humidifier in the n-th effect humidifier, is uniformly distributed by distributor
In filler surface countercurrent mass transfer heat transfer is carried out with the air entered from the n-th effect humidifier bottom.
Filler is mellapak packing or corrugated wire gauze packing or grid packing in the n-th effect humidifier or other are conducive to gas-liquid mass transfer
The filler of heat transfer.
Air passes through fan（Or wind turbine）Supercharging enters from the n-th effect humidifier bottom.
The first effect humidifier circulation fluid is obtained required by the First Heat Exchanger and the progress heat exchange of waste heat of plant exhaust gas
Heat, the second effect dehumidifier outlet air carry out heat exchange by second heat exchanger and waste heat of plant exhaust gas and obtain institute
Calorific requirement；The waste heat exhaust gas is the waste hot gas that waste discharge hot gas or exhaust steam or other processes generate outside factory.
The certain temperature of pending high organic wastewater with high salt is 20-100 DEG C or more.
The refrigeration equipment is air-cooled water cooling machine or water-cooled cooling water machine or other refrigeration equipments.
Beneficial effects of the present invention can be summarized as follows：
1, the present invention provides a kind of processing systems and system for realizing high organic wastewater zero-emission with high salt using waste heat, realize
The zero liquid discharge of high organic wastewater with high salt.
2, the condensed water that Hot wet air heating condensation generates in system, can be used as production system water or circulating cooling system is mended
Water, the production water rate of recovery is up to 80% or more.
3, total system only has three humidifier, dehumidifier and refrigerating plant major parts, flow is succinct, small accommodation area,
Equipment investment expense is low, it is easy to operate, can run steadily in the long term.
Chemical agent is not added when 4, running, and non-secondary pollution, operating cost is low.
5, system makes full use of the waste heat of waste water and exhaust gas to be handled, energy-saving.
Description of the drawings
Fig. 1 is the system flow chart of the present invention.
Main element symbol description is as follows：
1, the first effect humidifier 2, second imitates humidifier
3, third effect humidifier 4, first imitates dehumidifier
5, the second effect dehumidifier 6, First Heat Exchanger
7, the second heat exchanger 8, refrigeration equipment
9, crystallization tank 10, filter device
11, distributor 12, fan（Or wind turbine）
13, pump 21, high organic wastewater with high salt
22, waste heat of plant exhaust gas 23, condensed water
24, battery limit (BL) air 25, crystal salt.
Specific implementation mode
In order to make the technical problems, technical solutions and beneficial effects solved by the present invention be more clearly understood, below to this
Invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, and does not have to
It is of the invention in limiting.
A kind of flow chart of processing system for realizing high organic wastewater zero-emission with high salt using waste heat as shown in Figure 1,
Including humidifier, dehumidifier and refrigerating plant；Humidifier quantity is three, the respectively first effect humidifier, the second effect humidifier
Humidifier is imitated with third, the quantity of dehumidifier is two, the respectively first effect dehumidifier and the second effect dehumidifier
The pending high organic wastewater with high salt with certain temperature after filtering pre-processes with preheated through First Heat Exchanger
The first effect humidifier circulation fluid mixing, is delivered to the first effect humidifier later, through distributor disperse with from described the
The filler that the air that one effect humidifier bottom enters is imitated by described first inside humidifier carries out counter current contacting；First effect
The saturation Hot wet air heating being discharged at the top of humidifier（Relative humidity RH=100%）Through fan（Or wind turbine）Pressure-increasing unit to the first effect subtracts
Wet device returns again to the first effect humidifier through cool-down dehumidification and recycles；Hot wet air heating condenses production in the first effect dehumidifier
Raw condensed water is through pipelined to battery limit (BL)；
The second effect humidifier circulation fluid delivers into the first effect dehumidifier through pump and carries out heat exchange, institute with Hot wet air heating
The raising of the second effect humidifier circulation fluid temperature is stated, the second effect humidifier circulation fluid is dense with the first effect humidifier discharge
High organic wastewater with high salt after contracting is mixed at the top of the second effect humidifier；
It is described second effect humidifier at the top of enter mixing liquid through distributor disperse with from it is described second effect humidifier bottom into
The air entered imitates humidifier inner stuffing by described second and carries out counter current contacting, is discharged at the top of the second effect humidifier
The Hot wet air heating of saturation（Relative humidity RH=100%）Through fan（Or wind turbine）Supercharging enters refrigerating plant；
The refrigerating plant includes the second effect dehumidifier and refrigeration equipment, and the saturation heat of the second effect humidifier discharge is wet
Air（Relative humidity RH=100%）Through fan（Or wind turbine）Supercharging enters described second and imitates dehumidifier, is saturated Hot wet air heating and institute
The cooling water for stating refrigeration equipment carries out heat exchange, and Hot wet air heating, which enters after cool-down dehumidification in second heat exchanger, to heat up, it
After return again to the second effect humidifier and recycle, Hot wet air heating condenses the condensation of generation in the second effect dehumidifier
Water is exported through pipeline to battery limit (BL)；
High organic wastewater with high salt after the cooling concentration of the second effect humidifier discharge, with third effect humidifier cycle
It is delivered to after liquid mixing at the top of the third effect humidifier, dispersion of the mixing liquid through distributor and third effect humidifier bottom
The air that portion enters imitates humidifier inner stuffing by the third and carries out counter current contacting, from row at the top of third effect humidifier
The Hot wet air heating gone out is fed directly to air；The high organic wastewater with high salt close to saturation of third effect humidifier discharge into
Enter in crystallization tank, cool down at room temperature, the crystal salt generated in the crystallization tank enters desalination treatment process, in the crystallization tank
Coolant liquid through pump be back to third imitate humidifier.
In a more preferred embodiment, the system flow can be divided into n humidifier（n≥2）With n-1 dehumidifier（n
≥2）, the (n-1)th effect humidifier and the (n-1)th effect dehumidifier composition (n-1)th imitate humidification-dehumidification unit（n≥2）, wherein air is to close
Close endless form disengaging humidifier and dehumidifier, or open mode, battery limit (BL) air are directly humidified into the (n-1)th effect through wind turbine
Device, then battery limit (BL) is expelled to by the (n-1)th effect dehumidifier air bleeding valve.
In a more preferred embodiment, the n-1 effect humidification-dehumidification units combine for one or more repetitive units, described
N-th effect humidifier is independent humidifying unit.
In a more preferred embodiment, the refrigerating plant is wet for heat in the dehumidifier of (n-1)th effect humidification-dehumidification unit
The cool-down dehumidification of air.
In a more preferred embodiment, high organic wastewater with high salt is imitated from n-th at the top of humidifier in the n-th effect humidifier
Into the air for being uniformly distributed in filler surface by distributor and entering from the n-th effect humidifier bottom carries out countercurrent mass transfer biography
Heat.
In a more preferred embodiment, filler is mellapak packing or corrugated wire gauze packing or lattice in the n-th effect humidifier
Grid filler or other fillers to conduct heat conducive to gas-liquid mass transfer.
In a more preferred embodiment, air passes through fan（Or wind turbine）Supercharging enters from the n-th effect humidifier bottom.
In a more preferred embodiment, the first effect humidifier circulation fluid passes through the First Heat Exchanger and waste heat of plant
Exhaust gas carries out heat exchange and obtains institute's calorific requirement, and the second effect dehumidifier outlet air is by more than second heat exchanger and factory
Hot waste gas carries out heat exchange and obtains institute's calorific requirement；The waste heat exhaust gas is waste discharge hot gas or exhaust steam or the production of other processes outside factory
Raw waste hot gas.
In a more preferred embodiment, the certain temperature of pending high organic wastewater with high salt be 20-100 DEG C or with
On.
In a more preferred embodiment, the refrigeration equipment is air-cooled water cooling machine or water-cooled cooling water machine or other refrigeration
Equipment.
In the particular embodiment, in order to more clearly state the present invention, 1 couple of present invention further retouches below in conjunction with the accompanying drawings
It states.
The purpose of the present invention is making full use of the waste heat of high organic wastewater 21 and plant gas with high salt, thermal drivers zero are formed
Discharge process technique.Entire technological process includes mainly three humidifier, dehumidifier and refrigerating plant environment divisions, flow letter
It is clean, easy to operate, do not add that chemical agent, mass-and heat-transfer are efficient, equipment investment is small, small accommodation area, it is energy-saving, can grow
Phase stable operation, has a wide range of application.
Wherein, humidifier is divided into the first effect humidifier, the second effect humidifier ... n-th imitates humidifier（n=1、2、3…）, specifically
Humidifier number determines that preferably n=1,2,3 are three humidifiers, and also referred to as triple effect is humidified according to owner's waste water temperature.
Dehumidifier is divided into the first effect dehumidifier, the second effect dehumidifier ... (n-1)th imitates dehumidifier（n=2、3…）, specific dehumidification
Device number determines that preferably n=2,3 are two dehumidifiers, also referred to as two effect dehumidifying according to humidifier number.
Humidifier is not fixed with dehumidifier quantity in technique, and n humidifier may be used（n≥2）With n-1 dehumidifier（n
≥2）, the (n-1)th effect humidifier and the (n-1)th effect dehumidifier composition (n-1)th imitate humidification-dehumidification unit（n≥2）, wherein air is to close
Close endless form disengaging humidifier and dehumidifier, or open mode, battery limit (BL) air 24 directly add into the (n-1)th effect through wind turbine
Wet device, then battery limit (BL) is expelled to by the (n-1)th effect dehumidifier air bleeding valve.
Refrigerating plant includes mainly dehumidifier（I.e. (n-1)th effect dehumidifier）With refrigeration equipment 8.(n-1)th effect humidifier goes out heat
Humid air（Relative humidity RH=100%）Through fan（Or wind turbine）12 superchargings initially enter the (n-1)th effect dehumidifier and are produced with refrigeration equipment 8
Raw cooling water carries out heat exchange, and entering the second heat exchanger 7 after cool-down dehumidification heats up, and returns again to the (n-1)th effect humidifier and follows
Ring uses, and Hot wet air heating condenses the condensed water 23 of generation through pipelined to battery limit (BL) in the (n-1)th effect dehumidifier.Refrigerating plant is put
It is placed in the position of last effect Hot wet air heating cool-down dehumidification of 21 Zero-discharge treating process of high organic wastewater with high salt.
Using triple effect humidification and two effect dehumidifications in the present embodiment, humidifier is respectively the first effect humidifier 1, second effect humidification
Device 2 and third imitate humidifier 3, and dehumidifier is respectively the first effect dehumidifier 4 and second effect dehumidifier 5.
The pending high organic wastewater 21 with high salt with certain temperature is after filter device 10 is filtered pretreatment
With through First Heat Exchanger 6 preheat first effect 1 circulation fluid of humidifier mix, after through pipelined to first effect humidifier 1 top
Portion disperses through distributor 11 and carries out adverse current in humidifier inner stuffing with the air entered from the first 1 bottom of effect humidifier to connect
It touches, improves the mass-and heat-transfer efficiency in the first effect humidifier 1.The saturation Hot wet air heating that first effect humidifier, 1 top is discharged（Relatively
Humidity RH=100%）Through fan（Or wind turbine）12 superchargings enter the first effect dehumidifier 4.Hot wet air heating cools down through the first effect dehumidifier 4
After dehumidifying, pass through fan（Or wind turbine）12, which return to the first effect humidifier 1, recycles；Hot wet air heating is in the first effect dehumidifier 4
The condensed water 23 generated is condensed through pipelined to battery limit (BL).
Second effect 2 circulation fluid of humidifier delivers into the first effect dehumidifier 4 through pump 13 and carries out heat exchange, heat with Hot wet air heating
Heat in humid air is transferred in 2 circulation fluid of the second effect humidifier, the second effect 2 circulation fluid of humidifier and the after heating up later
High organic wastewater 21 with high salt mixing after the concentration that one effect humidifier 1 is discharged imitates 2 top of humidifier through pipelined to second,
The air that mixed liquor into 2 top of the second effect humidifier disperses through distributor 11 and enters from the second 2 bottom of effect humidifier is logical
It crosses the second effect 2 inner stuffing of humidifier and carries out counter current contacting, improve the mass-and heat-transfer efficiency in the second effect humidifier 2, the second effect
The Hot wet air heating for the saturation that 2 top of humidifier is discharged（Relative humidity RH=100%）Through fan（Or wind turbine）12 superchargings enter refrigeration
Device.
Refrigerating plant includes the second effect dehumidifier 5 and refrigeration equipment 8, the saturation Hot wet air heating that the second effect humidifier 2 is discharged
（Relative humidity RH=100%））Through fan（Or wind turbine）12 superchargings enter the second effect dehumidifier 5, and saturation Hot wet air heating is set with refrigeration
Standby 8 cooling water carries out heat exchange, and the Hot wet air heating after cool-down dehumidification heats up through the second heat exchanger 7, returns again to the second effect and adds
Wet device 2 recycles, and the condensed water 23 that Hot wet air heating condenses generation in the second effect dehumidifier 5 is exported through pipeline to battery limit (BL).
High organic wastewater with high salt 21 after the cooling concentration that second effect humidifier 2 is discharged is recycled with third effect humidifier 3
Through pipelined to 3 top of third effect humidifier after liquid mixing, dispersion of the mixing liquid through distributor 11 imitates humidifier 3 with third
The air that bottom enters imitates 3 inner stuffing of humidifier by third and carries out counter current contacting, improves the mass transfer in third effect humidifier 3
Heat transfer efficiency, the Hot wet air heating that 3 top of third effect humidifier is discharged are fed directly to air.
The high organic wastewater 21 with high salt close to saturation state that 3 bottom of third effect humidifier generates is discharged into crystallization tank 9,
Cool down at room temperature, the crystal salt 25 of generation enters desalination treatment process, and the coolant liquid of generation is back to third effect humidification through pump 13
Device 3.
First effect 1 circulation fluid of humidifier and the second effect 5 outlet air of dehumidifier and waste heat of plant exhaust gas 22 are respectively by the
One heat exchanger 6 and the second heat exchanger 7 carry out heat exchange and obtain respective institute's calorific requirement.
The present invention is described in detail above by specific and preferred embodiment, but those skilled in the art should be bright
In vain, the invention is not limited in embodiment described above, all within the spirits and principles of the present invention, made by it is any modification,
Equivalent replacement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of processing system for realizing high organic wastewater zero-emission with high salt using waste heat, including humidifier, dehumidifier and system
Device for cooling；Humidifier quantity is three, and the respectively first effect humidifier, the second effect humidifier and third imitate humidifier, dehumidifier
Quantity be two, respectively first effect dehumidifier and second effect dehumidifier, which is characterized in that including following system flow：
The pending high organic wastewater with high salt with certain temperature after filtering pre-processes with preheated through First Heat Exchanger
The first effect humidifier circulation fluid mixing, is delivered to the first effect humidifier later, through distributor disperse with from described the
The filler that the air that one effect humidifier bottom enters is imitated by described first inside humidifier carries out counter current contacting；First effect
The saturation Hot wet air heating being discharged at the top of humidifier（Relative humidity RH=100%）Through fan（Or wind turbine）Pressure-increasing unit to the first effect subtracts
Wet device returns again to the first effect humidifier through cool-down dehumidification and recycles；Hot wet air heating condenses production in the first effect dehumidifier
Raw condensed water is through pipelined to battery limit (BL)；
The second effect humidifier circulation fluid delivers into the first effect dehumidifier through pump and carries out heat exchange, institute with Hot wet air heating
The raising of the second effect humidifier circulation fluid temperature is stated, the second effect humidifier circulation fluid is dense with the first effect humidifier discharge
High organic wastewater with high salt after contracting is mixed at the top of the second effect humidifier；
It is described second effect humidifier at the top of enter mixing liquid through distributor disperse with from it is described second effect humidifier bottom into
The air entered imitates humidifier inner stuffing by described second and carries out counter current contacting, is discharged at the top of the second effect humidifier
The Hot wet air heating of saturation（Relative humidity RH=100%）Through fan（Or wind turbine）Supercharging enters refrigerating plant；
The refrigerating plant includes the second effect dehumidifier and refrigeration equipment, and the saturation heat of the second effect humidifier discharge is wet
Air（Relative humidity RH=100%）Through fan（Or wind turbine）Supercharging enters described second and imitates dehumidifier, is saturated Hot wet air heating and institute
The cooling water for stating refrigeration equipment carries out heat exchange, and Hot wet air heating, which enters after cool-down dehumidification in second heat exchanger, to heat up, it
After return again to the second effect humidifier and recycle, Hot wet air heating condenses the condensation of generation in the second effect dehumidifier
Water is exported through pipeline to battery limit (BL)；
High organic wastewater with high salt after the cooling concentration of the second effect humidifier discharge, with third effect humidifier cycle
It is delivered to after liquid mixing at the top of the third effect humidifier, dispersion of the mixing liquid through distributor and third effect humidifier bottom
The air that portion enters imitates humidifier inner stuffing by the third and carries out counter current contacting, from row at the top of third effect humidifier
The Hot wet air heating gone out is fed directly to air；The high organic wastewater with high salt close to saturation of third effect humidifier discharge into
Enter in crystallization tank, cool down at room temperature, the crystal salt generated in the crystallization tank enters desalination treatment process, in the crystallization tank
Coolant liquid through pump be back to third imitate humidifier.
2. a kind of processing system for realizing high organic wastewater zero-emission with high salt using waste heat according to claim 1, special
Sign is：The system flow can be divided into n humidifier（n≥2）With n-1 dehumidifier（n≥2）, (n-1)th effect humidifier and
(n-1)th effect dehumidifier composition the (n-1)th effect humidification-dehumidification unit（n≥2）, wherein air is that closed circulation mode passes in and out humidifier
And dehumidifier, or open mode, battery limit (BL) air directly imitate humidifier through wind turbine into (n-1)th, then pass through the (n-1)th effect dehumidification
Device air bleeding valve is expelled to battery limit (BL).
3. a kind of processing system for realizing high organic wastewater zero-emission with high salt using waste heat according to claim 2, special
Sign is：It is that one or more repetitive units combine that the n-1, which imitates humidification-dehumidification unit, and the n-th effect humidifier is independent adds
Wet unit.
4. a kind of processing system for realizing high organic wastewater zero-emission with high salt using waste heat according to claim 2, special
Sign is：Cool-down dehumidification of the refrigerating plant for Hot wet air heating in the dehumidifier of (n-1)th effect humidification-dehumidification unit.
5. a kind of processing system for realizing high organic wastewater zero-emission with high salt using waste heat according to claim 2, special
Sign is：High organic wastewater with high salt enters at the top of the n-th effect humidifier in the n-th effect humidifier, uniform by distributor
It is distributed in filler surface and carries out countercurrent mass transfer heat transfer with the air entered from the n-th effect humidifier bottom.
6. a kind of processing system for realizing high organic wastewater zero-emission with high salt using waste heat according to claim 2, special
Sign is：Filler is mellapak packing or corrugated wire gauze packing or grid packing in the n-th effect humidifier or other are conducive to gas-liquid
The filler of mass-and heat-transfer.
7. a kind of processing system for realizing high organic wastewater zero-emission with high salt using waste heat according to claim 2, special
Sign is：Air passes through fan（Or wind turbine）Supercharging enters from the n-th effect humidifier bottom.
8. a kind of processing system for realizing high organic wastewater zero-emission with high salt using waste heat according to claim 1, special
Sign is：The first effect humidifier circulation fluid carries out heat exchange by the First Heat Exchanger and waste heat of plant exhaust gas and obtains institute
Calorific requirement, the second effect dehumidifier outlet air carry out heat exchange with waste heat of plant exhaust gas by second heat exchanger and obtain
Institute's calorific requirement；The waste heat exhaust gas is the waste hot gas that waste discharge hot gas or exhaust steam or other processes generate outside factory.
9. a kind of processing system for realizing high organic wastewater zero-emission with high salt using waste heat according to claim 1, special
Sign is：The certain temperature of pending high organic wastewater with high salt is 20-100 DEG C or more.
10. a kind of processing system for realizing high organic wastewater zero-emission with high salt using waste heat according to claim 1, special
Sign is：The refrigeration equipment is air-cooled water cooling machine or water-cooled cooling water machine or other refrigeration equipments.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3517508A1 (en) * | 2018-09-21 | 2019-07-31 | SUEZ Groupe | Zero liquid discharge treatment process for recovering water from a contaminated liquid effluent for its subsequent reuse |
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| CN107029446A (en) * | 2017-03-02 | 2017-08-11 | 南京航空航天大学 | Double caloics couple solution condensing crystallizing system and method |
| CN107376384A (en) * | 2017-09-15 | 2017-11-24 | 南京工业大学 | A kind of vapo(u)rization system based on air adiabatic humidification |
| CN107651801A (en) * | 2017-10-24 | 2018-02-02 | 北京今大禹环境技术股份有限公司 | A kind of high organic wastewater hotting mask coupling Zero-discharge treating process of high salt |
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| CN1621356A (en) * | 2004-10-10 | 2005-06-01 | 尹进福 | Desalinization method by stepwise circulation of non-explosive evaporation and condensation |
| CN107029446A (en) * | 2017-03-02 | 2017-08-11 | 南京航空航天大学 | Double caloics couple solution condensing crystallizing system and method |
| CN107376384A (en) * | 2017-09-15 | 2017-11-24 | 南京工业大学 | A kind of vapo(u)rization system based on air adiabatic humidification |
| CN107651801A (en) * | 2017-10-24 | 2018-02-02 | 北京今大禹环境技术股份有限公司 | A kind of high organic wastewater hotting mask coupling Zero-discharge treating process of high salt |
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Application publication date: 20180821 |