CN102836623A - Sectional-type flue gas purifying treatment and waste heat recovery system device, and using method thereof - Google Patents

Sectional-type flue gas purifying treatment and waste heat recovery system device, and using method thereof Download PDF

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Publication number
CN102836623A
CN102836623A CN2012103397837A CN201210339783A CN102836623A CN 102836623 A CN102836623 A CN 102836623A CN 2012103397837 A CN2012103397837 A CN 2012103397837A CN 201210339783 A CN201210339783 A CN 201210339783A CN 102836623 A CN102836623 A CN 102836623A
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China
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gas
tower
gas holder
photodissociation
water tank
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CN2012103397837A
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Chinese (zh)
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张宏伟
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天津万博伟业科技发展有限公司
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Priority to CN2012103397837A priority Critical patent/CN102836623A/en
Publication of CN102836623A publication Critical patent/CN102836623A/en

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Abstract

The invention provides a sectional-type flue gas purifying treatment and waste heat recovery system device and a using method of the system device. A recovering tower, a spraying gas tank, a photolysis gas tank and a discharging tower in the system device are flexibly combined according to the components of the flue gas to be treated, different medicals are allocated or photolysis and oxidization techniques are adopted to treat so as to completely clean the flue gas with complex components, purify dust particles and toxic and harmful gas such as sulfur dioxide and hydrogen sulfide, and synchronously recover waste heat of flue gas and steam, in this way, the environment protection object of flue gas clean emission is reached. The sectional-type flue gas purifying treatment and waste heat recovery system device has the following beneficial effects that the flue gas is subjected to dust particle cleaning and waste heat recovering and then is subjected to multiple chemicals sectional reaction and absorption, and multi-stage photolysis and oxidizations so as to treat the toxic and harmful gas in the flue gas, finally the qualified gas is exhausted in air. The system device is suitable for the flue gas generated in industrial incinerations and industrial drying treatments, and is further suitable for the flue gas generated in incinerations of garbage and other substances.

Description

Segmented gas cleaning processing and residual neat recovering system device and method for using

Technical field

Produce the processing and the residual neat recovering system device of flue gas when the present invention relates to, particularly a kind of segmented gas cleaning processing and residual neat recovering system device and method for using to industry burning, dried.

Background technology

At present, more and more stricter to the control of fume emission both at home and abroad.Particularly industrial furnace burning, waste incineration, drying sludge and the flue gas that produces when burning; Not only contain dust granules, water vapour; And contain multiple toxic and harmfuls such as sulfur dioxide, nitrogen oxide, hydrogen sulfide, methyl mercaptan, methyl sulfide, dimethyl disulfide, ammonia, styrene, must get into atmosphere through discharging after the strict purified treatment.Standard GB 16297-1996 " discharge standard of air pollutants " and GB14554-93 " odorant pollutant discharge standard " have strict regulation to this.

Simultaneously, the flue gas typical temperature that these are discharged surpasses 100 ℃, wherein also contains a certain proportion of water vapour, has contained a large amount of residual heat resources.Reclaim these heats and utilize again, have the meaning of energy-conserving and environment-protective through heat-exchanger rig.

The device that one Chinese patent application CN200820222316 discloses a kind of " three connect tower deodorizing, desulfurization, deduster "; CN201110377054 discloses a kind of " rotary furnace smoke eliminator "; Above-mentioned patent is through the mode cleaning flue gases of the medicament spray mixed chemical absorption of multistage combination.

One Chinese patent application CN201120347808 discloses a kind of " the directed liquid film smoke dispersal, dust removal and desulphurization of groove type denitration unit ", through the mode cleaning flue gases of medicament moisture film mixed chemical absorption.

One Chinese patent application CN200910095344 discloses a kind of " using ozone oxygenation combined with double-tower washing is to the device and method of flue gas and desulfurizing and denitrifying ", combines the mode cleaning flue gases of two-stage medicament spray mixed chemical absorption through ozone oxidation.

One Chinese patent application CN99102187 discloses a kind of " flue gas treating process and system ", through the mode cleaning flue gases of waste heat recovery and the absorption of medicament powderject mixed chemical.

One Chinese patent application CN200910053740 discloses a kind of " integrated coupling device for flue gas desulfurization and dedusting "; CN200910127872 discloses a kind of " rotational flow fog curtain desulfurization and dust removal device "; CN200810160366 discloses a kind of " a kind of spraying desulphurization device "; CN200810198599 discloses " a kind of wet desulfurization dust-removing device and processing method thereof "; CN100345614C discloses a kind of " atomizing desulfurating dust-removing equipment ".The mode cleaning flue gases that above-mentioned file absorbs through the reagent spray mixed chemical.

One Chinese patent application CN1190238C discloses a kind of " high-end ultraviolet light foul gas processing method and equipment ", through the mode cleaning flue gases of ultraviolet light photodissociation.

One Chinese patent application CN101496995B " a kind of malodorous gas processing system and processing method thereof " is through the mode cleaning flue gases of ultraviolet light photodissociation and cellular activated carbon absorption.

One Chinese patent application CN1319600C discloses " treating apparatus and the method for the big air quantity foul gas of a kind of low concentration ", through the mode cleaning flue gases of ultraviolet light photodissociation and cellular activated carbon absorption and catalytic oxidation.

Above-mentioned literature content is that flue gas cleaning provides certain methods, but has complex structure, can't flexible combination and amplification scale; Function singleness, flue gas that can't the dealing with complicated composition; Hybrid reaction efficient is low, consumes resources.

Summary of the invention

To having problems in the above-mentioned technology, the purpose of this invention is to provide a kind of segmented gas cleaning processing and residual neat recovering system device and method for using, realize high efficient and flexible, the energy-conserving and environment-protective target of industrial smoke emission treatment.

For realizing above-mentioned purpose, the present invention provides a kind of segmented gas cleaning processing and residual neat recovering system device, and this system and device includes recovery tower 1, and recovery tower 1 lower end air outlet is connected with return water tank 6 top air inlets; Recovery tower 1 top is provided with liquid atomizing nozzle 2, and recovery tower 1 air inlet below is provided with the first moisture film device 3; Return water tank 6 bottoms first water pump 5 connects heat exchanger 4, and heat exchanger 4 is connected with the first moisture film device 3 with the liquid atomizing nozzle 2 of recovery tower 1 through pipeline; Return water tank 6 air outlets are connected for multistage spray gas holder 9 air inlets with serial connection; Spray gas holder 9 air outlets are connected for multistage photodissociation gas holder 12 air inlets with serial connection, and the air outlet of photodissociation gas holder 12 is connected with air-introduced machine 14 air inlets, and air-introduced machine 14 air outlets are connected with the air inlet of discharging tower 17 lower ends; 15 open tops of discharging water tank are connected with the bottom of discharging tower 17; Be positioned at the air inlet top in discharging tower 17 towers and be provided with second demister 20, liquid atomizing nozzle 19 and the second moisture film device 18 from top to bottom successively, discharging water tank 15 bottoms the 3rd water pump 16 connects the liquid atomizing nozzle 19 and the second moisture film device 18 that discharges towers.

In the said return water tank 6 dividing plate 11 is housed, through dividing plate 11 the first half of return water tank 6 is divided into air intake district and wind outlet area, first demister 7 is equipped with in said wind outlet area lower end, and return water tank 6 air outlets can be connected in series with a plurality of spray gas holders 9.

In the said spray gas holder 9 dividing plate 11 is housed, the first half that sprays gas holder 9 is divided into air intake district and wind outlet area; Medicament spray nozzle 10 is equipped with in the top in said air intake district; First demister 7 is equipped with in said wind outlet area lower end; Spray gas holder 9 bottoms are provided with second water pump 8, and are connected with medicament spray nozzle 10 through pipeline, and said spray gas holder 9 can be connected in series with a plurality of photodissociation gas holders 12.

In the said photodissociation gas holder 12 dividing plate 11 is housed, the first half of photodissociation gas holder is divided into air intake district and wind outlet area; Said wind outlet area is equipped with light source or ion gun 13.

Be equipped with on said return water tank 6, spray gas holder 9, photodissociation gas holder 12, the discharging water tank 15 and be convenient to clear up and artificial mouthful of safeguarding.

The air inlet of said recovery tower 1 can be positioned at cat head and with the tower coaxial direction, it is vertical with the recovery tower axle also can be positioned at tower top one-tenth level, and is oriented in a tangential direction with the recovery tower wall.The air outlet of described return water tank 6 and spray gas holder 9 into and out of the air port and photodissociation gas holder 12 can be arranged on the top into and out of the air port, also can be arranged on the top, side.The one-tenth level is vertical with discharging tower axle below the air inlet of described discharging tower 17 is positioned at tower, and is oriented in a tangential direction with discharging tower wall.

At first liquid atomizing nozzle 2 or second liquid atomizing nozzle 19 of said recovery tower 1 and discharging tower 17, its structure is air current spray nozzle or drive nozzle.

A kind of method for using that adopts above-mentioned gas cleaning processing and residual neat recovering system device also is provided simultaneously.

Effect of the present invention is:

1, first section is adopted the atomizing cooling to reclaim liquid and cleaning solution and flue gas hybrid mode, has strengthened the gas cleaning and has absorbed, and has improved tower volume purification efficiency, and is that good condition is created in follow-up processing;

2, can dispose different medicaments or photodissociation according to the composition flexible combination spray gas holder and the photodissociation gas holder that are processed flue gas, oxidation technology is handled, and is thorough to the flue gas cleaning of complicated component, fully realizes the environmental protection purpose;

3, the simple in structure and employing common apparatus of system and device has reduced manufacturing, configuration, maintenance cost; Can take into full account air inducing pressure and wind speed according to being processed exhaust gas volumn, form the series of products of different size.

Description of drawings

Fig. 1 is a system and device structural representation of the present invention;

Fig. 2 is a method flow diagram of the present invention.

Among the figure:

1, recovery tower 2, first liquid atomizing nozzle 3, the first moisture film device

4, heat exchanger 5, first water pump 6, return water tank

7, first demister 8, second water pump 9, spray gas holder

10, spray nozzle 11, dividing plate 12, photodissociation gas holder

13, light source or ion gun 14, air-introduced machine 15, discharging water tank

16, the 3rd water pump 17, discharging tower 18, the second moisture film device

19, second liquid atomizing nozzle 20, second demister

The specific embodiment

In conjunction with accompanying drawing and embodiment segmented gas cleaning processing of the present invention and residual neat recovering system device and method for using are explained.

Segmented gas cleaning processing of the present invention and residual neat recovering system device, this system and device includes recovery tower 1, and recovery tower 1 lower end air outlet is connected with return water tank 6 top air inlets; Recovery tower 1 top is provided with first liquid atomizing nozzle 2, and recovery tower 1 air inlet below is provided with the first moisture film device 3; Return water tank 6 bottoms first water pump 5 connects heat exchanger 4, and heat exchanger 4 is connected with the first moisture film device 3 with first liquid atomizing nozzle 2 of recovery tower 1 through pipeline; Return water tank 6 air outlets are connected for multistage spray gas holder 9 air inlets with serial connection; Spray gas holder 9 air outlets are connected for multistage photodissociation gas holder 12 air inlets with serial connection; The air outlet of photodissociation gas holder 12 is connected with air-introduced machine 14 air inlets, and air-introduced machine 14 air outlets are connected with the air inlet of discharging tower 17 lower ends; 15 open tops of discharging water tank are connected with the bottom of discharging tower 17; Be positioned at the air inlet top in discharging tower 17 towers and be provided with second demister 20, second liquid atomizing nozzle 19 and the second moisture film device 18 from top to bottom successively, discharging water tank 15 bottoms the 3rd water pump 16 connects second liquid atomizing nozzle 19 and the second moisture film device 18 that discharges towers 17.

In the said return water tank 6 dividing plate 11 is housed, through dividing plate 11 the first half of return water tank 6 is divided into air intake district and wind outlet area, first demister 7 is equipped with in said wind outlet area lower end.

Said return water tank 6 air outlets can be connected in series with a plurality of spray gas holders 9.

In the said spray gas holder 9 dividing plate 11 is housed, the first half that sprays gas holder 9 is divided into air intake district and wind outlet area; Medicament spray nozzle 10 is equipped with in the top in said air intake district, and first demister 7 is equipped with in said wind outlet area lower end, and spray gas holder 9 bottoms are provided with second water pump 8, and are connected with medicament spray nozzle 10 through pipeline.

Said spray gas holder 9 can be connected in series with a plurality of photodissociation gas holders 12.

In the said photodissociation gas holder 12 dividing plate 11 is housed, the first half of photodissociation gas holder 12 is divided into air intake district and wind outlet area; Said wind outlet area is equipped with light source or ion gun 13.

Be equipped with on said return water tank 6, spray gas holder 9, photodissociation gas holder 12, the discharging water tank 15 and be convenient to clear up and artificial mouthful of safeguarding.

First liquid atomizing nozzle 2 or second liquid atomizing nozzle 19 at said recovery tower 1 and discharging tower 17 are a kind of of air current spray nozzle, drive nozzle.

Described return water tank 6 is provided with air outlet, and spray gas holder 9 is provided with into and out of the air port, and photodissociation gas holder 12 is provided with into and out of the air port.The air outlet of return water tank 6, the spray gas holder 9 into and out of the air port, photodissociation gas holder 12 all be arranged on into and out of the air port corresponding component top or side the top; Recovery tower 1 is provided with air inlet, and the air inlet of said recovery tower 1 is positioned at cat head and with the tower coaxial direction or be positioned at tower top and become level vertical with the recovery tower axle, and is oriented in a tangential direction with the recovery tower wall.

The method for using of employing of the present invention above-mentioned segmented gas cleaning processing and residual neat recovering system device, this method is carried out in above-mentioned system and device, includes following steps:

(1) flue gas ash removal heat absorption recycling

1) flue gas that is processed is got into and downward along tower from the air inlet of recovery tower 1 upper end, outlet gets into return water tank 6 from recovery tower 1 bottom;

2) liquid is reclaimed in the cooling that is contained in the return water tank 6, like water, sodium hydrate aqueous solution etc.Carried by first water pump 5, first liquid atomizing nozzle 2 on heat exchanger 4 to recovery tower 1 top of flowing through also is atomized into droplet, axially sprays down along recovery tower 1, fully mixes with the flue gas that gets into recovery tower 1, reclaims the dust in flue gas particle, and absorbs fume afterheat;

3) cooling that is contained in the return water tank 6 is reclaimed liquid by 5 conveyings of first water pump; The flow through first moisture film device 3 and the adherent injections of heat exchanger 4 to recovery tower 1; Inwall formation at recovery tower 1 is rotated down moisture film; Make cooling reclaim liquid and mix, reclaim the dust in flue gas particle, and absorb fume afterheat with the flue gas that touches wall;

4) above-mentioned steps 2), the cooling that rushes at return water tank 6 downwards along recovery tower 1 of the flue gas of step 3), water atomization amalgam reclaims the liquid level of liquid; Gas reclaims the reflection of liquid liquid level through cooling in flue gas, the water atomization amalgam; And after first demister 7 of flowing through carries out foam removal and handle, get into the spray gas holder 9 that is connected in series from return water tank 6 air outlets;

(2) multi-grade chemical absorbs and handles

1) according to the heterogeneity of toxic and harmful in the flue gas, confirm the series connection quantity of spray gas holder 9 and photodissociation gas holder 12, form multistage spray gas holder 9 and photodissociation gas holder 12;

2) in the spray gas holder 9 of (two) step 1), add different chemical agents respectively, like sodium hydrate aqueous solution, aqueous sodium hypochlorite solution etc.Said chemical agent is delivered to the spray nozzle 10 that sprays gas holder 9, the downward spraying agent from the top through second water pump 8.The medicament that makes downward sprinkling mixes with the gas that gets into spray gas holder 9 air intake districts, and reacts with toxic and harmful composition in the gas.The medicament that sprays can upgrade after losing efficacy;

3) gas after chemical reaction is handled is walked around dividing plate 11 in spray gas holder 9, gets into wind outlet area demister 7 and carries out the foam removal processing, gets into the next stage spray gas holder 9 that is connected in series then; The gas of accomplishing after chemical absorbing is handled sprays the photodissociation gas holder 12 that gas holder 9 gets into plural serial stages from afterbody;

(3) multistage photodissociation or oxidation processes

1) in said multistage photodissociation gas holder 12, different photodissociation fluorescent tubes and photocatalysis apparatus or ion generator 13 are set respectively; Like uviol lamp, anion generator etc.; When making the gas that gets into photodissociation gas holder 12 flow through spray gas holder 9, the toxic and harmful composition is by photodissociation or oxidation in the gas;

2) after treatment gas gets into the next stage photodissociation gas holder 12 that is connected in series and handles; Gas after photodissociation or oxidation processes gets into the air-introduced machine 14 that is connected in series from afterbody photodissociation gas holder 12, and sends into discharging tower 17 through air-introduced machine 14;

(4) purify the absorption emission treatment

1) through the gas of aforementioned processing horizontal air inlet, send into the discharging tower by tangential direction from discharging tower 17 lower ends, and along the wall rotation upwards;

2) be contained in the cleaning solution that discharges in the water tank 15; Like water, NaOH, aqueous sodium hypochlorite solution etc.; Deliver to second liquid atomizing nozzle 19 of discharging tower 17 and be atomized into droplet through the 3rd water pump 16; Axially spray down along tower, mix to absorb chemical agent composition, toxic and harmful remaining in the gas with the gas that rotation in the discharging tower 17 is risen;

3) cleaning solution that is contained in the discharging water tank 15 is delivered to the second moisture film device 18 and the adherent injections of discharging tower 17 through the 3rd water pump 16; Inwall at tower forms moisture film opposite with the gas direction of rotation, that be rotated down; Mix with the gas that touches wall, absorb chemical agent composition, toxic and harmful remaining in the gas.Said cleaning solution upgraded after losing efficacy;

4), after second demister 20 in discharging tower 17 is removed droplet, drop, get into atmosphere from the qualified discharging of cat head through the gas of aforementioned processing.

Embodiment one:

Segmented gas cleaning processing of the present invention and residual neat recovering system device are as shown in Figure 1: this system and device includes recovery tower 1, and recovery tower 1 lower end air outlet is connected with return water tank 6 top air inlets; Recovery tower 1 top is provided with first liquid atomizing nozzle 2, and recovery tower 1 air inlet below is provided with the first moisture film device 3; Return water tank 6 bottoms first water pump 5 connects heat exchanger 4, and heat exchanger 4 is connected with the first moisture film device 3 with first liquid atomizing nozzle 2 of recovery tower 1 through pipeline; Return water tank 6 air outlets are connected for multistage spray gas holder 9 air inlets with serial connection; Spray gas holder 9 air outlets are connected for multistage photodissociation gas holder 12 air inlets with serial connection; The air outlet of photodissociation gas holder 12 is connected with air-introduced machine 14 air inlets, and air-introduced machine 14 air outlets are connected with the air inlet of discharging tower 17 lower ends; 15 open tops of discharging water tank are connected with the bottom of discharging tower 17; Be positioned at the air inlet top in discharging tower 17 towers and be provided with second demister 20, second liquid atomizing nozzle 19 and the second moisture film device 18 from top to bottom successively, discharging water tank 15 bottoms the 3rd water pump 16 connects second liquid atomizing nozzle 19 and the second moisture film device 18 that discharges towers 17.

As shown in Figure 2, the method for employing segmented gas cleaning processing of the present invention and residual neat recovering system device may further comprise the steps:

1, the flue gas that gets into system and device is at first carried out first section dust granules clean, and waste heat recovery processing, 60 ℃~85 ℃ hot water produced; And the afterheat of hot water that reclaims is passed through heat exchanger output utilize.

2, to through the flue gas of first section processing, carry out chemical reaction that second section single-stage or plural serial stage carry out and absorb and handle, remove wherein part toxic and harmful; And the chemical agent that is neutralized of reducible processing reduced processing, recycle.

3, to flue gas through first, second section processing, carry out photodissociation or oxidation reaction that the 3rd section single-stage or plural serial stage carry out and handle, remove wherein part toxic and harmful.

4, to the flue gas through first, second, third section processing, the purification of carrying out the 4th section absorbs emission treatment.Finally reach national specified discharge standard, gas enters atmosphere.

Embodiment two:

With embodiment one difference, spray gas holder 9 directly is connected with discharging tower 17 through air-introduced machine 14, and system is not provided with photodissociation gas holder 12.Only realize step 1, step 2 and the step 4 of embodiment one, do not relate to step 3.

Embodiment three:

With embodiment one difference, return water tank 6 directly is connected with photodissociation gas holder 12, and system is not provided with spray gas holder 9.Only realize step 1, step 3 and the step 4 of embodiment one, do not relate to step 2.

Embodiment four:

With embodiment one difference, system is not provided with spray gas holder 9 and photodissociation gas holder 12.Return water tank 6 directly is connected with discharging tower 17 through air-introduced machine 14.Only realize the step 1 and 4 of embodiment one, do not relate to step 2 and step 3.

Claims (10)

1. segmented gas cleaning processing and residual neat recovering system device, it is characterized in that: this system and device includes recovery tower (1), and recovery tower (1) lower end air outlet is connected with return water tank (6) top air inlet; Recovery tower (1) top is provided with first liquid atomizing nozzle (2), and recovery tower (1) air inlet below is provided with the first moisture film device (3); Return water tank (6) bottom first water pump (5) connects heat exchanger (4), and heat exchanger (4) is connected with the first moisture film device (3) with first liquid atomizing nozzle (2) of recovery tower (1) through pipeline; Return water tank (6) air outlet is connected for multistage spray gas holder (9) air inlet with serial connection; Spray gas holder (9) air outlet is connected for multistage photodissociation gas holder (12) air inlet with serial connection; The air outlet of photodissociation gas holder (12) is connected with air-introduced machine (14) air inlet, and air-introduced machine (14) air outlet is connected with the air inlet of discharging tower (17) lower end; The open top of discharging water tank (15) is connected with the bottom of discharging tower (17); Be positioned at the air inlet top in discharging tower (17) tower and be provided with second demister (20), second liquid atomizing nozzle (19) and the second moisture film device (18) from top to bottom successively, discharging water tank (15) bottom the 3rd water pump (16) connects second liquid atomizing nozzle (19) and the second moisture film device (18) of discharging tower (17).
2. segmented gas cleaning processing according to claim 1 and residual neat recovering system device; It is characterized in that: dividing plate (11) is housed in the said return water tank (6); Through dividing plate (11) the first half of return water tank (6) is divided into air intake district and wind outlet area, first demister (7) is equipped with in said wind outlet area lower end.
3. segmented gas cleaning processing according to claim 1 and residual neat recovering system device is characterized in that: said return water tank (6) air outlet can be connected in series with a plurality of spray gas holders (9).
4. segmented gas cleaning processing according to claim 1 and residual neat recovering system device is characterized in that: dividing plate (11) is housed in the said spray gas holder (9), and the first half that will spray gas holder (9) is divided into air intake district and wind outlet area; Medicament spray nozzle (10) is equipped with at the top in said air intake district, and first demister (7) is equipped with in said wind outlet area lower end, and spray gas holder (9) bottom is provided with second water pump (8), and is connected with medicament spray nozzle (10) through pipeline.
5. segmented gas cleaning processing according to claim 1 and residual neat recovering system device is characterized in that: said spray gas holder (9) can be connected in series with a plurality of photodissociation gas holders (12).
6. segmented gas cleaning processing according to claim 1 and residual neat recovering system device is characterized in that: dividing plate (11) is housed in the said photodissociation gas holder (12), the first half of photodissociation gas holder (12) is divided into air intake district and wind outlet area; Said wind outlet area is equipped with light source or ion gun (13).
7. segmented gas cleaning processing according to claim 1 and residual neat recovering system device is characterized in that: be equipped with on said return water tank (6), spray gas holder (9), photodissociation gas holder (12), the discharging water tank (15) and be convenient to clear up and artificial mouthful of safeguarding.
8. gas cleaning processing according to claim 1 and residual neat recovering system device is characterized in that: at first liquid atomizing nozzle (2) or second liquid atomizing nozzle (19) of said recovery tower (1) and discharging tower (17) can be but be not limited to a kind of of air current spray nozzle, drive nozzle.
9. gas cleaning processing according to claim 1 and residual neat recovering system device is characterized in that: described return water tank (6) is provided with air outlet, and spray gas holder (9) is provided with into and out of the air port, and photodissociation gas holder (12) is provided with into and out of the air port.The air outlet of return water tank (6), the spray gas holder (9) into and out of the air port, photodissociation gas holder (12) all be arranged on into and out of the air port corresponding component top or side the top; Recovery tower (1) is provided with air inlet, and the air inlet of said recovery tower (1) is positioned at cat head and with the tower coaxial direction or be positioned at tower top and become level vertical with the recovery tower axle, and is oriented in a tangential direction with the recovery tower wall; Discharging tower (17) is provided with air inlet, and it is vertical with discharging tower axle that the air inlet of said discharging tower (17) is positioned at tower below one-tenth level, and is oriented in a tangential direction with discharging tower wall.
10. method for using that adopts claim 1 said segmented gas cleaning processing and residual neat recovering system device, this method is carried out in above-mentioned system and device, includes following steps:
(1) flue gas ash removal heat absorption recycling
1) flue gas that is processed is got into and downward along tower from the air inlet of recovery tower (1) upper end, outlet gets into return water tank (6) from recovery tower (1) bottom;
2) the cooling recovery liquid that is contained in the return water tank (6) is carried by first water pump (5); The liquid atomizing nozzle (2) on heat exchanger (4) to the recovery tower (1) of flowing through top also is atomized into droplet; Axially spray down along recovery tower (1); Fully mix with the flue gas that gets into recovery tower (1), reclaim the dust in flue gas particle, and absorb fume afterheat;
3) the cooling recovery liquid that is contained in the return water tank (6) is carried by first water pump (5); The flow through first moisture film device (3) and the adherent injection of heat exchanger (4) to recovery tower (1); Inwall formation at recovery tower (1) is rotated down moisture film; Make cooling reclaim liquid and mix, reclaim the dust in flue gas particle, and absorb fume afterheat with the flue gas that touches wall;
4) above-mentioned steps 2), the cooling that rushes at return water tank (6) downwards along recovery tower (1) of the flue gas of step 3), water atomization amalgam reclaims the liquid level of liquid; Gas reclaims the reflection of liquid liquid level through cooling in flue gas, the water atomization amalgam; And after first demister (7) of flowing through carries out foam removal and handle, get into the spray gas holder (9) that is connected in series from return water tank (6) air outlet;
(2) multi-grade chemical absorbs and handles
1) according to the heterogeneity of toxic and harmful in the flue gas, confirm the series connection quantity of spray gas holder (9) and photodissociation gas holder (12), form multistage spray gas holder (9) and photodissociation gas holder (12);
2) in the spray gas holder (9) of (two) step 1), add different chemical agents respectively; Said chemical agent is delivered to the spray nozzle (10) of spray gas holder (9) through second water pump (8); The downward spraying agent from the top; The medicament that makes downward sprinkling mixes with the gas that gets into spray gas holder (9) air intake district, and reacts with toxic and harmful composition in the gas.The medicament that sprays can upgrade after losing efficacy;
3) gas after chemical reaction is handled is walked around dividing plate (11) in spray gas holder (9), gets into wind outlet area demister (7) and carries out the foam removal processing, gets into the next stage spray gas holder (9) that is connected in series then; The gas of accomplishing after chemical absorbing is handled sprays the photodissociation gas holder (12) that gas holder (9) gets into plural serial stage from afterbody;
(3) multistage photodissociation or oxidation processes
1) different photodissociation fluorescent tubes and photocatalysis apparatus or ion generator (13) are set respectively in said multistage photodissociation gas holder (12); When making the gas that gets into photodissociation gas holder (12) flow through photodissociation gas holder (9), the toxic and harmful composition is by photodissociation or oxidation in the gas;
2) after treatment gas gets into the next stage photodissociation gas holder (12) that is connected in series and handles; Gas after photodissociation or oxidation processes gets into the air-introduced machine (14) that is connected in series from afterbody photodissociation gas holder (12), and sends into discharging tower (17) through air-introduced machine (14);
(4) purify the absorption emission treatment
1) through the gas of aforementioned processing horizontal air inlet, send into the discharging tower by tangential direction from discharging tower (17) lower end, and along the wall rotation upwards;
2) cleaning solution that is contained in the discharging water tank (15) is delivered to second liquid atomizing nozzle (19) of discharging tower (17) and is atomized into droplet through the 3rd water pump (16); Axially spray down along tower, mix to absorb chemical agent composition, toxic and harmful remaining in the gas with the gas that rotation in the discharging tower (17) is risen;
3) cleaning solution that is contained in the discharging water tank (15) is delivered to the second moisture film device (18) and the adherent injection of discharging tower (17) through the 3rd water pump (16); Inwall at tower forms moisture film opposite with the gas direction of rotation, that be rotated down; Mix with the gas that touches wall, absorb chemical agent composition, toxic and harmful remaining in the gas; Said cleaning solution upgraded after losing efficacy;
4), after second demister (20) in discharging tower (17) is removed droplet, drop, get into atmosphere from the qualified discharging of cat head through the gas of aforementioned processing.
CN2012103397837A 2012-09-14 2012-09-14 Sectional-type flue gas purifying treatment and waste heat recovery system device, and using method thereof CN102836623A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
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Application publication date: 20121226