CN109603409A - A kind of flue gas purification system and flue gas purifying method - Google Patents

A kind of flue gas purification system and flue gas purifying method Download PDF

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Publication number
CN109603409A
CN109603409A CN201910002301.0A CN201910002301A CN109603409A CN 109603409 A CN109603409 A CN 109603409A CN 201910002301 A CN201910002301 A CN 201910002301A CN 109603409 A CN109603409 A CN 109603409A
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tower
active carbon
srg
flue gas
analytic tower
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CN109603409B (en
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魏进超
李俊杰
李勇
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Zhongye Changtian International Engineering Co Ltd
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Zhongye Changtian International Engineering Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • B01J20/3416—Regenerating or reactivating of sorbents or filter aids comprising free carbon, e.g. activated carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • B01J20/3483—Regenerating or reactivating by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
    • B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Treating Waste Gases (AREA)

Abstract

A kind of flue gas purification system, including Analytic Tower, adsorption tower, the first conveying device, the second conveying device, third conveying device；Analytic Tower includes bringing-up section, changeover portion, cooling section；The side wall of changeover portion is equipped with SRG gas vent；The top of Analytic Tower is equipped with first charging aperture and second charging aperture；SRG gas dust-removing device is arranged right below in changeover portion and positioned at second charging aperture；SRG gas dust-removing device is located at the inside of SRG gas vent, and SRG gas dust-removing device is closely arranged with SRG gas vent；First conveying device connects the first charging aperture of the active carbon outlet and Analytic Tower of adsorption tower, second conveying device connects the active carbon entrance of the active carbon outlet and adsorption tower of Analytic Tower, and third conveying device connects the second charging aperture of the active carbon outlet and Analytic Tower of Analytic Tower；The second charging aperture of Analytic Tower is also connect with supplement material conveying tube road.The present invention can be realized the accurate control to system activity charcoal stream, and then realize the purification of flue gas and the dedusting of SRG gas.

Description

A kind of flue gas purification system and flue gas purifying method
Technical field
The present invention relates to activated carbon method flue gas purification systems, and in particular to a kind of flue gas purification system and gas cleaning side Method belongs to field of environment protection.
Background technique
For the sintering device flue gas of industrial smoke, especially steel and iron industry, conciliate using including activated carbon adsorber The desulphurization and denitration device and technique for analysing tower are more satisfactory.It is including activated carbon adsorber and Analytic Tower (or regenerator) In desulphurization and denitration device, activated carbon adsorber is used for from sintering flue gas or exhaust gas (the especially sintering cigarette of the sintering machine of steel and iron industry Gas) in pollutant of the absorption including oxysulfide, nitrogen oxides and dioxin including, and Analytic Tower for active carbon it is hot again It is raw.
Activated carbon desulfurization has desulfurization degree height, denitration can be achieved at the same time, de- dioxin, dedusting, do not generate waste water and dregs The advantages that, it is extremely promising flue gas purifying method.Active carbon can regenerate at high temperature, when temperature is higher than 350 DEG C, absorption (sulfur dioxide is solved for the pollutants such as oxysulfide, nitrogen oxides, dioxin on the activated carbon generation fast resolving or decomposition Analysis, nitrogen oxides and dioxin are decomposed).And as the temperature rises, the reproduction speed of active carbon is further speeded up, regeneration Time shortens, and preferably regenerating active carbon temperature is approximately equal to 430 DEG C in general control Analytic Tower, therefore, ideal parsing temperature Spending (or regeneration temperature) is for example in 390-450 DEG C of range, more preferably in 400-440 DEG C of range.
The effect of Analytic Tower is by the SO of activated carbon adsorption2It releases, while stopping in 400 DEG C or more of temperature and centainly It stays under the time, dioxin decomposable 80% or more, active carbon recycles again after cooling, screening.The SO released2It can make Sulfuric acid etc., the communicated device of active carbon after parsing are sent to adsorption tower and are re-used to absorption SO2With NOx etc..
SCR, SNCR etc. occurs with ammonia with NOx in Analytic Tower in adsorption tower to react, to remove NOx.Dust is passing through suction It is tightly held by activated carbon when attached tower, the vibrating screen in Analytic Tower bottom end is separated, and is that active carbon powder sends to ash cellar under sieving, then Blast furnace can be sent to or sintering is used as fuel.
Traditional activated carbon method flue gas purification system is as depicted in figs. 1 and 2, and flue gas realizes purification process by adsorption tower In, dust is filtered down by active carbon in flue gas in adsorption tower, while pollutant SO2Into being adsorbed in the duct of active carbon Get off, the reaction of generation are as follows:
SO2(gaseous state) → SO2(ADSORPTION STATE)；
SO2(ADSORPTION STATE)+H2O+1/2O2→H2SO4；
Dust and H are adsorbed2SO4Active carbon be sent into Analytic Tower through conveying device, it is anti-that regeneration occurs under the high temperature conditions It answers, including H in active carbon duct2SO4Decomposition:
This reaction reopens the active carbon duct of script blocking, but since the evolution of the gas of generation can also generate largely Fugitive dust, the carrier gas N in Analytic Tower2The former exhaust gas dust that carry fugitive dust and activated carbon adsorption is exported from SRG (i.e. sulfur-rich gas) Discharge.Cause SRG fuel gas and dust concentration higher, typically about 2g/m3, when highest can reach 10g/m3More than, increase subsequent richness The load of sulphur gas purification facility, influences SO2The quality of resource utilization product, or even cause SO2Resource utilization process without Method operates normally.
Summary of the invention
For above-mentioned problems of the prior art, the present invention provides a kind of flue gas purification system, the gas cleaning system Analytic Tower in system adds a feed inlet on the basis of existing feed inlet, and is equipped with SRG dedusting in changeover portion and fills It sets.When using flue gas purification system of the present invention, it is filled with active carbon in SRG gas dust-removing device, which is solution The new active carbon of bulky grain active carbon and external supplement after analysis through being sieving through, its own does not contain or only contains few powder Dirt and labile pollutant first pass through SRG gas dust-removing device before the discharge of SRG gas and are dusted, greatly reduce SRG gas Dust concentration in body guarantees SO to alleviate the load of sulfur-rich gas purification facility2The quality of resource utilization product.
Correspondingly, the invention also provides a kind of flue gas purifying method, by the flue gas purifying method, can be realized to being The accurate control for active carbon stream of uniting, and then realize the purification of flue gas and the dedusting of SRG gas.
The first embodiment according to the present invention, provides a kind of flue gas purification system:
A kind of flue gas purification system, the system include Analytic Tower, adsorption tower, the first conveying device, the second conveying device, Three conveying devices.The Analytic Tower includes bringing-up section, changeover portion, cooling section.The top of Analytic Tower, cooling section is arranged in bringing-up section The lower part of Analytic Tower is set, and changeover portion is arranged between a heating section and a cooling section.The side wall of changeover portion is equipped with SRG gas and goes out Mouthful.The top of Analytic Tower is equipped with first charging aperture and second charging aperture.It is set in changeover portion and immediately below second charging aperture There is SRG gas dust-removing device.SRG gas dust-removing device is located at the inside of SRG gas vent, and SRG gas dust-removing device and SRG Gas vent is closely arranged.The active carbon that first conveying device connects adsorption tower exports and the first charging aperture of Analytic Tower, and second Conveying device connects the active carbon entrance of the active carbon outlet and adsorption tower of Analytic Tower, and third conveying device connects the work of Analytic Tower Property the charcoal outlet and second charging aperture of Analytic Tower.The bottom of adsorption tower is equipped with the first baiting valve.The bottom of Analytic Tower is equipped with second Baiting valve.The second charging aperture of Analytic Tower is also connect with supplement material conveying tube road.
Preferably, being equipped with first partition between first charging aperture and second charging aperture.The lower end of first partition and heating The top connection of section.
Preferably, the top side of SRG gas dust-removing device be equipped with second partition, and second partition setting with SRG The opposite side of gas vent.The upper end of second partition and the bottom connection of bringing-up section and lower end and SRG gas dust-removing device connect It connects.
Preferably, first partition and second partition are arranged in parallel with the side where SRG gas vent, and second every The underface of first partition is arranged in plate.
In the present invention, the SRG gas dust-removing device is active carbon channel layer.The top and bottom of active carbon channel layer It is hatch frame.
Preferably, the left and right sides of SRG gas dust-removing device is respectively shutter or perforated plate construction.
In the present invention, SRG gas collection device is equipped in changeover portion.The setting of SRG gas dust-removing device converges in SRG gas Between acquisition means and SRG gas vent.
The left and right sides of SRG gas dust-removing device refers to inlet end and the outlet side of SRG gas dust-removing device.Wherein, SRG The inlet end of gas dust-removing device is connected to SRG gas collection device, and the outlet side connection SRG gas of SRG gas dust-removing device goes out Mouthful.
Preferably, SRG gas collection device includes loading plate and multiple active carbon streams for being connected in loading plate bottom surface Circulation passage.There are gap between each active carbon circulation passage, the gap is SRG air ventilation passage.Active carbon circulation passage Top and bottom be hatch frame.The top of SRG air ventilation passage is loading plate, and bottom is hatch frame.
Preferably, the top of adsorption tower is equipped with the first level-sensing device.The second material position is equipped at the first charging aperture of Analytic Tower Meter.Third level-sensing device is equipped at the second charging aperture of Analytic Tower.
Preferably, the lower part of the second baiting valve is equipped with vibrating screen.
Second of embodiment according to the present invention, provides a kind of flue gas purifying method:
Carry out the method for purifying smoke using above-mentioned flue gas purification system, method includes the following steps:
1) former flue gas is transported in adsorption tower by the smoke inlet of activated carbon adsorber, the activated carbon adsorption of adsorption tower Former flue gas is handled, the pollutant in former flue gas is adsorbed the activated carbon adsorption in tower；Flue gas after treatment is from adsorption tower Exhanst gas outlet discharge；
2) active carbon of pollutant has been adsorbed in adsorption tower by the first baiting valve discharge of absorption tower bottom, has then been passed through The first charging aperture that the first conveying device is delivered to Analytic Tower is crossed, the active carbon for having adsorbed pollutant passes through heating in Analytic Tower Regeneration, the second baiting valve by parsing tower bottom are discharged；
3) analytically the active carbon of tower discharge is divided into two parts；A portion is delivered to absorption by the second conveying device The active carbon entrance of tower, the former flue gas of circulation absorption processing；Another part by third conveying device convey Analytic Tower second into Material mouth, subsequently into SRG gas dust-removing device, which is used to remove the dust in SRG gas, SRG gas collection The SRG gas that device collects is discharged after SRG gas dust-removing device dedusting from SRG gas vent.
Preferably, step 2) further include: analytically the active carbon of tower discharge removes active carbon after vibrating screen sieves In dust particles, the active carbon entrance of adsorption tower is then delivered to by the second conveying device again and by third conveying device It is delivered to the second charging aperture of Analytic Tower.
In the present invention, this method further include: the amount of step 4) active carbon according to needed for handling former flue gas in adsorption tower, In Analytic Tower parse active carbon treating capacity and vibrating screen screening remove active carbon dust amount, by supplement material conveying tube road from The second charging aperture of Analytic Tower supplements new active carbon and enters Analytic Tower.
In the present invention, step 4) specifically:
A) the former flue gas entered in adsorption tower is detected, and combines contaminant removal efficiency requirement, calculate adsorption tower The interior amount for handling the active carbon that former flue gas needs, obtains the discharge quantity M of adsorption tower1；
B) according to the relationship of the frequency of the first baiting valve and the discharge quantity of adsorption tower, adjust the first baiting valve frequency be with The discharge quantity M of adsorption tower1Corresponding frequency f1；
C) the target material position L of the second level-sensing device below the first charging aperture of Analytic Tower is setTarget 2, read the second level-sensing device Material position L2, according to L2With LTarget 2Size relation, adjust the second baiting valve frequency f2, so that L2=LTarget 2；
D) according to the relationship of the frequency of the second baiting valve and the discharge quantity of Analytic Tower, show that the discharge quantity of Analytic Tower is and the The frequency f of two baiting valves2Corresponding discharge quantity M2；
E) outlet active carbon flow M of the vibrating screen by screening below Analytic Tower is determinedOutlet, as a result, the second conveying device and The active carbon total flow M of third conveying device conveying2'=M2-MOutlet；The second conveying device is kept to be to the feeding coal of adsorption tower M1, then feeding coal M of the third conveying device to the second charging aperture of Analytic Tower3=M2'-M1；
F) the target material position L of third level-sensing device below the second charging aperture of Analytic Tower is setTarget 3, read third level-sensing device Material position L3, work as L3< LTarget 3When, new active carbon is supplemented to the second charging aperture of Analytic Tower by supplementing material conveying tube road；Work as L3 > LTarget 3When, stop supplementing new active carbon into Analytic Tower；Finally make L3=LTarget 3。
In the present invention, the former flue gas entered in adsorption tower is detected described in step a), calculates place in adsorption tower The amount for managing the active carbon that former flue gas needs, obtains the discharge quantity M of adsorption tower1, specifically:
1. calculating the SO that adsorption tower need to be handled2, NOx amount: the flow for detecting former flue gas is Q, titanium dioxide in former flue gas The concentration of sulphur isThe concentration of former nitrogen oxides in effluent is CNOx, adsorption tower need to be handled as a result, SO2, NOx amount difference Are as follows:
WNOx=ηNOx×Q×CNOx/106；………(2)
In formula (1),The SO that need to be handled for adsorption tower2Amount, units/kg/h；Q is the flow of former flue gas, unit Nm3/ h；For SO in former flue gas2Concentration, unit mg/Nm3；For SO2Removal efficiency；In formula (2), WNOxIt is needed for adsorption tower The amount of the NOx of processing, units/kg/h；CNOxFor the concentration of former nitrogen oxides in effluent, unit mg/Nm3；ηNOxFor the removal of NOx Efficiency；
2. basisAnd WNOx, calculate the discharge quantity M of adsorption tower1:
In formula (3), M1For the discharge quantity of adsorption tower, units/kg/h；k1For the first coefficient, k1Value is 5-50, preferably 8- 40, more preferably 10-20；k2For the second coefficient, k2Value is 1-40, preferably 3-30, more preferably 5-20.
In the present invention, the frequency f of the first baiting valve (9) described in step b)1With the discharge quantity M of adsorption tower (8)1Pass System specifically: M1=f1×k4×l1×dBetween 1×ρ1/r1×d1 is straight, in which: k44th coefficient, l1For the length of the first baiting valve round roller Degree, dBetween 1For the gap of the first baiting valve round roller, ρ1For active carbon heap density, r in adsorption tower1For the round roller of the first baiting valve round roller Maximum (top) speed, d1 is straightFor the diameter of the first baiting valve round roller；k4Value be 0.01-0.2, preferably 0.03-0.15, more preferably 0.05-0.1。
In the present invention, the frequency f of the second baiting valve (10) described in step d)2With the discharge quantity M of Analytic Tower (A)2Pass System specifically: M2=f2×k5×l2×dBetween 2×ρ2/r2×d2 is straight, in which: k55th coefficient, l2For the length of the second baiting valve round roller Degree, dBetween 2For the gap of the second baiting valve round roller, ρ2For active carbon heap density, r in Analytic Tower2For the round roller of the second baiting valve round roller Maximum (top) speed, d2 is straightFor the diameter of the second baiting valve round roller；k5Value be 0.01-0.2, preferably 0.03-0.15, more preferably 0.05-0.1。
In the present invention, the frequency f of the second baiting valve is adjusted described in step c)2, specifically:
Work as L2> LTarget 2When, increase the frequency f of the second baiting valve2；Work as L2< LTarget 2When, reduce the frequency of the second baiting valve f2, finally make L2=LTarget 2。
In the present invention, the outlet active carbon flow M of Analytic Tower is determined described in step e)Outlet, specifically:
MOutlet=k3×M2；………(4)
And meet: d2/(d1+d2) > k3；………(5)
In formula (4), k3For third coefficient, value range 1%-3%；M2For the discharge quantity of Analytic Tower, units/kg/h；Formula (5) in, d1To parse the width between inner wall of tower and first partition close to side immediately below first charging aperture；d2For SRG gas The width of dust-extraction unit, i.e., the width close to side immediately below second charging aperture, between second partition and SRG gas vent.
In the present invention, the first conveying device and the second conveying device can be conveyer；Such as select conveyer belt as First conveying device and the second conveying device.Third conveying device can be conveyer, be also possible to the biography without power device Transfer device；For example, can choose conveyer belt or chute as third conveying device.
In the present invention, the second conveying device can be set there are two feed opening, and one of feed opening is fed to adsorption tower, Another feed opening is fed to third conveying device.Third conveying device connects a feed opening and the parsing of the second conveying device The second charging aperture of tower.
In flue gas purification system of the invention, the top of Analytic Tower is equipped with first charging aperture and second charging aperture.? SRG gas dust-removing device is equipped in the changeover portion of the underface of two feed inlets, SRG gas dust-removing device is located at SRG gas vent Inside, and SRG gas dust-removing device is closely arranged with SRG gas vent.In the present invention, SRG gas dust-removing device is preferred For active carbon channel layer, the inlet end of active carbon channel layer and outlet side are respectively shutter or perforated plate construction.In addition, air inlet The shutter or perforated plate construction of end and/or outlet side can be set to one or more layers.Preferably, first charging aperture and the First partition is additionally provided between two feed inlets, the lower end of first partition and the top of bringing-up section connect.SRG gas dust-removing device Top side (i.e. the side opposite with SRG gas vent) is additionally provided with second partition, the upper end of second partition and the bottom of bringing-up section Portion's connection and lower end are connect with SRG gas dust-removing device.First partition and second partition with SRG gas vent where side It is arranged in parallel, and the underface of first partition is arranged in second partition.In the present invention, the setting of first partition is by Analytic Tower First charging aperture is separated with second charging aperture, meanwhile, second partition is added, so that from first charging aperture and from second charging aperture The active carbon of entrance forms two stock streams from top to bottom.It is wherein to have adsorbed pollutant from the active carbon that first charging aperture enters Active carbon to be resolved, the amount of activated charcoal have been utilized, and filtration, purification function is limited, and the amount of activated charcoal itself is just A large amount of fugitive dusts can be generated, the dedusting of SRG gas is unfavorable for.It and is then after parsing from the active carbon that second charging aperture enters through sieving The bulky grain active carbon crossed and the new active carbon being added by supplement material conveying tube road, the amount of activated charcoal are not contained or are contained only There are few dust and labile pollutant, its own will not generate fugitive dust, and the dedusting of SRG gas can be better achieved.
Present inventor will specially enter the active carbon of Analytic Tower in a kind of parsing tower apparatus of researching and designing before this It is divided into two strands in Analytic Tower.It is a part of normally to pass through bringing-up section, the SRG gas collection device in changeover portion, cooling section, so It is discharged afterwards from outlet；Another part passes through bringing-up section, the SRG dust-extraction unit in changeover portion, cooling section, is then discharged from outlet. But through overtesting and use, discovery uses the parsing tower apparatus, due to being to have adsorbed dirt by the active carbon in Analytic Tower Contaminate object (including sulfur dioxide, nitride, dust) active carbon, by such active carbon analytically tower feed inlet input, exist Following problems: 1, into the active carbon of changeover portion in SRG dust-extraction unit itself contain too many dust and labile pollutant, i.e., Itself just generates a large amount of fugitive dust, which cannot play good dustproof function to SRG gas；2, itself is adsorbed The active carbon of pollutant (including sulfur dioxide, nitride) is in the position of SRG dust-extraction unit, since the flow of SRG gas is opposite It is larger, and entire Analytic Tower is while discharge, the active carbon passed through from SRG dust-extraction unit cannot be parsed sufficiently, in active carbon Pollutant cannot parse completely, so that pollutant cannot be discharged from SRG gas vent, what which did not parsed Pollutant follows active carbon, and analytically tower discharge gate is discharged, and influences the utilization of the next circulation of active carbon；3, since SRG dedusting fills Good dustproof function cannot be played to SRG gas by setting, and cause to contain a large amount of powder out of SRG gas vent is discharged gas Dirt increases the load of subsequent sulfur-rich gas purification facility, influences SO2The quality of resource utilization product.
By the continuous research and test of inventor, novel Analytic Tower provided by the invention is developed, existing parsing is changed Two active carbon entrances are arranged in the structure of tower, are two chambers by space division in Analytic Tower more than SRG gas vent horizontal position Room.See attached drawing, left chamber (from first charging aperture) input is to have adsorbed the active carbon of pollutant, that is, arrange from adsorption tower Active carbon out, the chamber are specifically used to the active carbon of Dissociative adsorption pollutant.Right chamber (from second charging aperture) input Be fresh active carbon, that is, the active carbon after being parsed by Analytic Tower, the chamber pass through the dress such as shutter or porous plate It sets to form active carbon layer, forms a SRG gas dust-removing device, which is used to SRG dedusting.SRG dedusting dress Setting in the SRG gas that between SRG gas collection device and SRG gas vent, SRG gas collection device collects in left chamber Body is discharged from SRG gas vent again after SRG gas dust-removing device.SRG gas dust-removing device is using as filtering material Active carbon is dusted processing to SRG gas, and the active carbon in SRG gas dust-removing device is fresh active carbon, does not adsorb Pollutant and dust etc., the amount of activated charcoal are the active carbon for only having adsorbed dust, warp after SRG gas dust-removing device Analytically tower discharge port is discharged after supercooling section, can be delivered to adsorption tower and be recycled.
The feed inlet of Analytic Tower is divided into two by the present invention, and by the top half of Analytic Tower, (feed inlet goes out to SRG gas Mouthful) be also divided into two, wherein the active carbon layer for dedusting forms SRG gas dust-removing device, which is new fresh and alive Property charcoal, solves in the prior art that the amount of activated charcoal dust removing effects are limited, and pollutant is difficult to the problem of parsing；Cleverly utilize Active carbon removes dust as filtering material；Meanwhile the next step for not influencing active carbon recycles.
Flue gas purification system provided by the invention, including above-mentioned Analytic Tower, further include adsorption tower, the first conveying device, Second conveying device and third conveying device.Wherein, the first conveying device is used to that discharge will to be exported from the active carbon of adsorption tower The active carbon for having adsorbed pollutant is delivered to the first charging aperture of Analytic Tower, and the second conveying device is used for the activity of analytically tower Active carbon after the regeneration of charcoal outlet discharge is delivered to the active carbon entrance of adsorption tower, and third conveying device is for will analytically tower Active carbon outlet discharge regeneration after active carbon be delivered to the second charging aperture of Analytic Tower.The second charging aperture of Analytic Tower is also It is connect with supplement material conveying tube road.The top of adsorption tower is equipped with the first level-sensing device, the first charging aperture of Analytic Tower and the second charging Mouth is respectively equipped with the second level-sensing device and third level-sensing device.
Correspondingly, the present invention is also based on above-mentioned flue gas purification system and provides a kind of flue gas purifying method, this method setting the Two level-sensing devices, third level-sensing device target material position be respectively LTarget 2、LTarget 3, and read the reality of the second level-sensing device, third level-sensing device Material position L2、L3, it is adjusted according to the relationship of the practical material position and target material position of each level-sensing device, so that L2=LTarget 2, L3=LTarget 3, To realize accurate control to active carbon stream, so that entire flue gas purification system is organic, normal operation.The control method Specifically: former flue gas is detected first, the SO that need to be handled by calculating adsorption tower2, NOx amount, adsorption tower is calculated Discharge quantity M1, further according to the discharge quantity M of adsorption tower1Obtain the blanking frequency f of the first baiting valve1；Then according to L2With LTarget 2's Size relation adjusts to obtain the blanking frequency f of the second baiting valve2, to obtain the discharge quantity M of Analytic Tower2；Again by determining parsing The outlet active carbon flow M of towerOutlet, while keeping the constant material level of adsorption tower, that is, keep the second conveying device to adsorption tower to Doses is M1, third conveying device is thus obtained to the feeding coal M of the second charging aperture of Analytic Tower3=M2'-M1；Meanwhile working as L3< LTarget 3When, new active carbon is supplemented to the second charging aperture of Analytic Tower by supplementing material conveying tube road；Work as L3> LTarget 3When, stop New active carbon is supplemented into Analytic Tower；Finally make L3=LTarget 3。
Wherein, the outlet active carbon flow M of Analytic TowerOutlet=k3×M2；And d2/(d1+d2) > k3。k3For third coefficient, take Value range is 1%-3%.d1To parse inner wall of tower and first partition (or second partition) close to side immediately below first charging aperture Between width.d2For the width of SRG gas dust-removing device, i.e., close to side immediately below second charging aperture, second partition (or the One partition) and SRG gas vent between width.
In the inventive solutions, the operating of active carbon in each device is rationally controlled, so that entire fume treatment System is organic, normal operation, realizes being precisely controlled for stream.Specifically: first according to the ingredient of pollutant in former flue gas and Content, calculates the amount that the active carbon that the exhaust gas volumn needs is handled in adsorption tower, and the amount of active carbon as needed controls adsorption tower The frequency of blow-off valve (the first blow-off valve), enables the active carbon in adsorption tower timely and effectively to handle former flue gas；Then exist The active carbon that pollutant has been adsorbed in adsorption tower is transported to Analytic Tower and carries out dissection process, the absorption active carbon of pollutant It is all delivered to the first charging aperture of Analytic Tower, then carries out heating parsing；Fresh activity charcoal after heating parsing is analytically The discharge port of tower is discharged；The analytically active carbon of tower discharge port discharge (active carbon is the fresh activity charcoal with adsorption function) It is divided into two parts, a part is delivered to adsorption tower, the former flue gas of circulation absorption processing；Another part be delivered to the second of Analytic Tower into Material mouth, subsequently into SRG gas dust-removing device, for SRG dedusting.According to material position below first charging aperture in Analytic Tower The material position situation of meter controls the active carbon discharge rate of Analytic Tower discharge port, the activity that analytically tower discharge port is discharged as needed The amount of charcoal controls the frequency of Analytic Tower blow-off valve (the second blow-off valve), guarantees that the material position in Analytic Tower below first charging aperture is steady It is fixed；Analytically in the active carbon (preferably through the gross activity charcoal after screening) of tower discharge port discharge, holding is delivered to absorption for control The amount of active carbon needed in the amount of the active carbon of tower and adsorption tower is identical (or equal), remaining analytically tower discharge port discharge Active carbon be transported to Analytic Tower second charging aperture, then further according to the material position feelings of level-sensing device below Analytic Tower second charging aperture Condition supplements new active carbon (the additional new active carbon that the active carbon is external supplement) in real time so that Analytic Tower second into Material position below material mouth is normal.
Preferably, analytically the active carbon of tower discharge port discharge is sieved and then is divided into two by vibrating screen Point, a part is delivered to adsorption tower, and another part is delivered to the second charging aperture of Analytic Tower.By screening, remove in active carbon Dust particles, improve effect and efficiency of the active carbon in adsorption tower and SRG gas dust-removing device.
In the present invention, the inlet end of the SRG gas dust-removing device (i.e. active carbon channel layer) or outlet side are respectively only It is on the spot shutter or perforated plate construction.That is, by former and later two shutters or perforated plate construction it Between distance define the thickness of active carbon channel layer, that is, define gas pass through active carbon channel layer linear distance.
It is hatch frame at the top and bottom of the active carbon channel layer in invention.Upper opening and bringing-up section connection, Under shed and cooling section connection.
In invention, the SRG gas collection device includes loading plate and multiple work for being connected in the bottom surface of loading plate Gap between property charcoal circulation passage.It is hatch frame at the top and bottom of active carbon circulation passage.Generally, active carbon circulates The cross section in channel is round or rectangle or triangle.For example, active carbon circulation passage is rendered as the form of vertical tube.
In invention, the length of active carbon circulation passage is 5-100cm, preferably 10-80cm, more preferably 15-60cm.
In invention, loading plate is equipped with multiple active carbon circulation passages, has gap between these active carbon circulation passages. Gap between active carbon circulation passage is SRG air ventilation passage.Collect or collect sulfur-rich gas in SRG air ventilation passage Body (SRG).
In invention, the cross-sectional area of active carbon channel layer is the 1-20% of SRG gas collection device cross-sectional area, preferably For 3-15%, more preferably 5-10%.
In invention, the bringing-up section is shell cylinder structure；Active carbon walks tube side, and heat gas walks shell side.
In invention, the cooling section is shell cylinder structure；Active carbon walks tube side, and cooling gas walks shell side.
In invention, the length of active carbon circulation passage is its length in vertical direction.
In invention, loading plate is equipped with multiple active carbon circulation passages, and the quantity of active carbon circulation passage is unrestricted, It requires to set according to actual production technique, generally according to the content etc. of pollutant in the size of Analytic Tower, analytic ability, active carbon Factor design.In general, the quantity of active carbon circulation passage is 50-700 in Analytic Tower, preferably 100-600, more have It is selected as 200-500.
In invention, the cross-sectional area of active carbon channel layer refers on the face of Analytic Tower transverse direction, the cross in active carbon channel Sectional area.Similarly, SRG gas collection device cross-sectional area refers on the face of Analytic Tower transverse direction, the cross of SRG gas collection device Sectional area.The cross-sectional area of active carbon channel layer and the size of SRG gas collection device cross-sectional area are unrestricted, according to reality Manufacturing technique requirent setting；Generally depending on the content of dust in SRG gas；If dust content is high in SRG gas, live Property charcoal channel layer cross-sectional area it is big (or its thickness is bigger)；On the contrary, active carbon is logical if dust content is low in SRG gas The cross-sectional area of channel layer is small (or its thickness is smaller).
In the present invention, the height of Analytic Tower is 15-80m, preferably 18-60m, more preferably 20-40m.SRG gas removes Width (the namely d of dirt device2) it is 50-500mm, preferably 80-400mm, more preferably 100-300mm.With the prior art It compares, the present invention has following advantageous effects:
1, the Analytic Tower in flue gas purification system of the present invention adds a feed inlet, together on the basis of existing feed inlet When SRG gas dust-removing device is set in the underface changeover portion for the feed inlet added, be sieving through after effective use parsing The filtration, purification function of fresh activity charcoal and the new active carbon of external supplement realizes the dedusting of SRG gas；
2, the Analytic Tower in flue gas purification system of the present invention, between first charging aperture and second charging aperture be equipped with first every Plate, first partition are arranged right below second partition, and the setting of partition is so that the active carbon entered from different feed inlets forms two Stock stream separates the active carbon of contaminant-laden and clean active carbon, does not on the one hand influence from first charging aperture entrance Active carbon carries out parsing regeneration, and fugitive dust on the other hand will not be generated in dust removal process from the active carbon that second charging aperture enters Or pollutant, dust removing effects are more preferably；
3, it using flue gas purification system and its control method of the invention, can be realized to the accurate of system activity charcoal stream Control, and then realize the purification of flue gas and the dedusting of SRG gas；
4, the SRG fuel gas and dust content being discharged by Analytic Tower of the present invention or flue gas purification system is few, alleviates sulfur-rich gas The load of body purification facility, ensure that SO2The quality of resource utilization product.
Detailed description of the invention
Fig. 1 is the schematic diagram of activated carbon method flue gas purification system in the prior art；
Fig. 2 is the cross-sectional view of the position B-B in Fig. 1；
Fig. 3 is the structural schematic diagram of Analytic Tower in the present invention；
Fig. 4 is the structural schematic diagram of flue gas purification system in the present invention；
Fig. 5 is the cross-sectional view of the position C-C in Fig. 4.
Appended drawing reference: A: Analytic Tower；A01: first charging aperture；A02: second charging aperture；1: bringing-up section；2: changeover portion； 201:SRG gas vent；3: cooling section；4:SRG gas dust-removing device；5: first partition；6: second partition；7:SRG gas converges Acquisition means；701: loading plate；702: active carbon circulation passage；703:SRG air ventilation passage；8: adsorption tower；9: the first blankings Valve；10: the second baiting valves；11: the first level-sensing devices；12: the second level-sensing devices；13: third level-sensing device；14: vibrating screen；D1: the first Conveying device；D2: the second conveying device；D3: third conveying device；L: supplement material conveying tube road.
Specific embodiment
The first embodiment according to the present invention, provides a kind of flue gas purification system:
A kind of flue gas purification system, the system include Analytic Tower A, adsorption tower 8, the first conveying device D1, the second conveying dress Set D2, third conveying device D3.The Analytic Tower A includes bringing-up section 1, changeover portion 2, cooling section 3.The setting of bringing-up section 1 is parsing The lower part of Analytic Tower A is arranged in the top of tower A, cooling section 3, and changeover portion 2 is arranged between bringing-up section 1 and cooling section 3.Changeover portion 2 side wall is equipped with SRG gas vent 201.The top of Analytic Tower A is equipped with first charging aperture A01 and second charging aperture A02.It crosses It crosses and is arranged right below SRG gas dust-removing device 4 in section 2 and positioned at second charging aperture A02.SRG gas dust-removing device 4 is located at The inside of SRG gas vent 201, and SRG gas dust-removing device 4 and SRG gas vent 201 are closely arranged.First conveying device The first charging aperture A01 of the active carbon outlet and Analytic Tower A of D1 connection adsorption tower 8, the second conveying device D2 connection Analytic Tower A's The active carbon entrance of active carbon outlet and adsorption tower 8, the active carbon outlet of third conveying device D3 connection Analytic Tower A and Analytic Tower The second charging aperture A02 of A.The bottom of adsorption tower 8 is equipped with the first baiting valve 9.The bottom of Analytic Tower A is equipped with the second baiting valve 10. The second charging aperture A02 of Analytic Tower A is also connect with supplement material conveying tube road L.
Preferably, being equipped with first partition 5 between first charging aperture A01 and second charging aperture A02.Under first partition 5 End is connect with the top of bringing-up section 1.
Preferably, the top side of SRG gas dust-removing device 4 be equipped with second partition 6, and second partition 6 setting with The opposite side of SRG gas vent 201.The upper end of second partition 6 is connect with the bottom of bringing-up section 1 and lower end is removed with SRG gas Dirt device 4 connects.
Preferably, first partition 5 and second partition 6 are arranged in parallel with the side where SRG gas vent 201, and The underface of first partition 5 is arranged in second partition 6.
In the present invention, the SRG gas dust-removing device 4 is active carbon channel layer.The top and bottom of active carbon channel layer Portion is hatch frame.
Preferably, the left and right sides of SRG gas dust-removing device 4 is respectively shutter or perforated plate construction.
In the present invention, SRG gas collection device 7 is equipped in changeover portion 2.SRG gas dust-removing device 4 is arranged in SRG gas Between body aggregating apparatus 7 and SRG gas vent 201.
Preferably, SRG gas collection device 7 includes loading plate 701 and the multiple work connected in 701 bottom surface of loading plate Property charcoal circulation passage 702.There are gap between each active carbon circulation passage 702, the gap is SRG air ventilation passage 703. The top and bottom of active carbon circulation passage 702 are hatch frame.The top of SRG air ventilation passage 703 is loading plate 701, bottom is hatch frame.
Preferably, the top of adsorption tower 8 is equipped with the first level-sensing device 11.The is equipped at the first charging aperture A01 of Analytic Tower A Two level-sensing devices 12.Third level-sensing device 13 is equipped at the second charging aperture A02 of Analytic Tower A.
Preferably, the lower part of the second baiting valve 10 is equipped with vibrating screen 14.
Second of embodiment according to the present invention, provides a kind of flue gas purifying method:
Carry out the method for purifying smoke using above-mentioned flue gas purification system, method includes the following steps:
1) former flue gas is transported in adsorption tower 8 by the smoke inlet of activated carbon adsorber 8, the active carbon of adsorption tower 8 Adsorption treatment original flue gas, the pollutant in former flue gas are adsorbed the activated carbon adsorption in tower 8；Flue gas after treatment is from absorption The exhanst gas outlet of tower 8 is discharged；
2) active carbon that pollutant has been adsorbed in adsorption tower 8 is discharged by the first baiting valve 9 of 8 bottom of adsorption tower, so The first charging aperture A01 of Analytic Tower A is delivered to by the first conveying device D1 afterwards, has adsorbed the active carbon of pollutant in Analytic Tower By heating regeneration in A, it is discharged by the second baiting valve 10 of the bottom Analytic Tower A；
3) analytically the active carbon of tower A discharge is divided into two parts；A portion is delivered to by the second conveying device D2 The active carbon entrance of adsorption tower 8, the former flue gas of circulation absorption processing；Another part conveys Analytic Tower A by third conveying device D3 Second charging aperture A02, subsequently into SRG gas dust-removing device 4, which is used to remove dust in SRG gas, The SRG gas that SRG gas collection device 7 collects is discharged after 4 dedusting of SRG gas dust-removing device from SRG gas vent 201.
Preferably, step 2) further include: analytically the active carbon of tower A discharge is after the screening of vibrating screen 14, except deactivation Dust particles in property charcoal, are then delivered to the active carbon entrance of adsorption tower 8 by the second conveying device D2 again and pass through third Conveying device D3 is delivered to the second charging aperture A02 of Analytic Tower A.
In the present invention, this method further include: step 4) active carbon according to needed for handling former flue gas in adsorption tower 8 Treating capacity and the screening of vibrating screen 14 that active carbon is parsed in amount, Analytic Tower A remove the amount of active carbon dust, pass through supplement material conveying Analytically the second charging aperture A02 of tower A supplements new active carbon and enters Analytic Tower A pipeline L.
In the present invention, step 4) specifically:
A) the former flue gas entered in adsorption tower 8 is detected, and combines contaminant removal efficiency requirement, calculate adsorption tower The amount that the active carbon that former flue gas needs is handled in 8, obtains the discharge quantity M of adsorption tower 81；
B) according to the relationship of the frequency of the first baiting valve 9 and the discharge quantity of adsorption tower 8, the frequency of the first baiting valve 9 is adjusted For the discharge quantity M with adsorption tower 81Corresponding frequency f1；
C) the target material position L of the second level-sensing device 12 below the first charging aperture A01 of Analytic Tower A is setTarget 2, read the second material The material position L of position meter 122, according to L2With LTarget 2Size relation, adjust the second baiting valve 10 frequency f2, so that L2=LTarget 2；
D) according to the relationship of the frequency of the second baiting valve 10 and the discharge quantity of Analytic Tower A, show that the discharge quantity of Analytic Tower A is With the frequency f of the second baiting valve 102Corresponding discharge quantity M2；
E) outlet active carbon flow M of the vibrating screen 14 by screening below Analytic Tower A is determinedOutlet, the second conveying fills as a result, Set the active carbon total flow M of D2 and third conveying device D3 conveying2'=M2-MOutlet；Keep the second conveying device D2 to adsorption tower 8 Feeding coal be M1, then feeding coal M of the third conveying device D2 to the second charging aperture A02 of Analytic Tower A3=M2'-M1；
F) the target material position L of third level-sensing device 13 below the second charging aperture A02 of Analytic Tower A is setTarget 3, read third material The material position L of position meter 133, work as L3< LTarget 3When, it is supplemented newly by supplement material conveying tube road L to the second charging aperture A02 of Analytic Tower A Active carbon；Work as L3> LTarget 3When, stop supplementing new active carbon into Analytic Tower A；Finally make L3=LTarget 3。
In the present invention, the former flue gas entered in adsorption tower 8 is detected described in step a), is calculated in adsorption tower 8 The amount for handling the active carbon that former flue gas needs, obtains the discharge quantity M of adsorption tower 81, specifically:
1. calculating the SO that adsorption tower 8 need to be handled2, NOx amount: the flow for detecting former flue gas is Q, titanium dioxide in former flue gas The concentration of sulphur isThe concentration of former nitrogen oxides in effluent is CNOx, adsorption tower 8 need to be handled as a result, SO2, NOx amount difference Are as follows:
WNOx=ηNOx×Q×CNOx/106；………(2)
In formula (1),The SO that need to be handled for adsorption tower 82Amount, units/kg/h；Q is the flow of former flue gas, unit Nm3/ h；For SO in former flue gas2Concentration, unit mg/Nm3；For SO2Removal efficiency；In formula (2), WNOxIt is needed for adsorption tower 8 The amount of the NOx of processing, units/kg/h；CNOxFor the concentration of former nitrogen oxides in effluent, unit mg/Nm3；ηNOxFor the removal of NOx Efficiency；
2. basisAnd WNOx, calculate the discharge quantity M of adsorption tower 81:
In formula (3), M1For the discharge quantity of adsorption tower 8, units/kg/h；k1For the first coefficient, k1Value is 5-50, preferably 8- 40, more preferably 10-20；k2For the second coefficient, k2Value is 1-40, preferably 3-30, more preferably 5-20.
In the present invention, the frequency f of the first baiting valve (9) described in step b)1With the discharge quantity M of adsorption tower (8)1Pass System specifically: M1=f1×k4×l1×dBetween 1×ρ1/r1×d1 is straight, in which: k44th coefficient, l1For the length of the first baiting valve round roller Degree, dBetween 1For the gap of the first baiting valve round roller, ρ1For active carbon heap density, r in adsorption tower1For the round roller of the first baiting valve round roller Maximum (top) speed, d1 is straightFor the diameter of the first baiting valve round roller；k4Value be 0.01-0.2, preferably 0.03-0.15, more preferably 0.05-0.1。
In the present invention, the frequency f of the second baiting valve (10) described in step d)2With the discharge quantity M of Analytic Tower (A)2Pass System specifically: M2=f2×k5×l2×dBetween 2×ρ2/r2×d2 is straight, in which: k55th coefficient, l2For the length of the second baiting valve round roller Degree, dBetween 2For the gap of the second baiting valve round roller, ρ2For active carbon heap density, r in Analytic Tower2For the round roller of the second baiting valve round roller Maximum (top) speed, d2 is straightFor the diameter of the second baiting valve round roller；k5Value be 0.01-0.2, preferably 0.03-0.15, more preferably 0.05-0.1。
In the present invention, the frequency f of the second baiting valve 10 is adjusted described in step c)2, specifically:
Work as L2> LTarget 2When, increase the frequency f of the second baiting valve 102；Work as L2< LTarget 2When, reduce the frequency of the second baiting valve 10 Rate f2, finally make L2=LTarget 2。
In the present invention, the outlet active carbon flow M of Analytic Tower A is determined described in step e)Outlet, specifically:
MOutlet=k3×M2；………(4)
And meet: d2/(d1+d2) > k3；………(5)
In formula (4), k3For third coefficient, value range 1%-3%；M2For the discharge quantity of Analytic Tower A, units/kg/h；Formula (5) in, d1For the width close to side immediately below first charging aperture A01, between Analytic Tower A inner wall and first partition 5；d2For SRG The width of gas dust-removing device 4, i.e., close to side immediately below second charging aperture A02, second partition 6 and SRG gas vent 201 it Between width.
Embodiment 1
As shown in Figures 3 and 4, a kind of flue gas purification system, the system include Analytic Tower A, adsorption tower 8, the first conveying device D1, the second conveying device D2, third conveying device D3.The Analytic Tower A includes bringing-up section 1, changeover portion 2, cooling section 3.Heating The top of Analytic Tower A is arranged in section 1, and the lower part of Analytic Tower A is arranged in cooling section 3, and the setting of changeover portion 2 is in bringing-up section 1 and cooling Between section 3.The side wall of changeover portion 2 is equipped with SRG gas vent 201.The top of Analytic Tower A is equipped with first charging aperture A01 and the Two feed inlet A02.SRG gas dust-removing device 4 is arranged right below in changeover portion 2 and positioned at second charging aperture A02.SRG gas Dust-extraction unit 4 is located at the inside of SRG gas vent 201, and SRG gas dust-removing device 4 and SRG gas vent 201 are closely arranged. The first charging aperture A01, the second conveying device D2 of the active carbon outlet and Analytic Tower A of first conveying device D1 connection adsorption tower 8 Connect the active carbon entrance of the active carbon outlet and adsorption tower 8 of Analytic Tower A, the activity of third conveying device D3 connection Analytic Tower A The second charging aperture A02 of charcoal outlet and Analytic Tower A.The bottom of adsorption tower 8 is equipped with the first baiting valve 9.The bottom of Analytic Tower A is equipped with Second baiting valve 10.The second charging aperture A02 of Analytic Tower A is also connect with supplement material conveying tube road L.
First partition 5 is equipped between first charging aperture A01 and second charging aperture A02.The lower end of first partition 5 and bringing-up section 1 top connection.The top side of SRG gas dust-removing device 4 be equipped with second partition 6, and second partition 6 setting with SRG gas Body exports 201 opposite sides.The upper end of second partition 6 is connect with the bottom of bringing-up section 1 and lower end and SRG gas dust-removing device 4 connections.First partition 5 and second partition 6 are arranged in parallel with the side where SRG gas vent 201, and second partition 6 is set It sets in the underface of first partition 5.
The SRG gas dust-removing device 4 is active carbon channel layer.It is opening knot at the top and bottom of active carbon channel layer Structure.The left and right sides of SRG gas dust-removing device 4 is respectively shutter.
SRG gas collection device 7 is equipped in changeover portion 2.SRG gas dust-removing device 4 is arranged in SRG gas collection device 7 Between SRG gas vent 201.SRG gas collection device 7 includes loading plate 701 and is connected in 701 bottom surface of loading plate more A active carbon circulation passage 702.There are gap between each active carbon circulation passage 702, the gap is SRG air ventilation passage 703.The top and bottom of active carbon circulation passage 702 are hatch frame.The top of SRG air ventilation passage 703 is carrying Plate 701, bottom are hatch frame.
The top of adsorption tower 8 is equipped with the first level-sensing device 11.The second level-sensing device is equipped at the first charging aperture A01 of Analytic Tower A 12.Third level-sensing device 13 is equipped at the second charging aperture A02 of Analytic Tower A.The lower part of second baiting valve 10 is equipped with vibrating screen 14.
Embodiment 2
A kind of flue gas purifying method, using the flue gas purification system in embodiment 1, method includes the following steps:
1) former flue gas is transported in adsorption tower 8 by the smoke inlet of activated carbon adsorber 8, the active carbon of adsorption tower 8 Adsorption treatment original flue gas, the pollutant in former flue gas are adsorbed the activated carbon adsorption in tower 8；Flue gas after treatment is from absorption The exhanst gas outlet of tower 8 is discharged；
2) active carbon that pollutant has been adsorbed in adsorption tower 8 is discharged by the first baiting valve 9 of 8 bottom of adsorption tower, so The first charging aperture A01 of Analytic Tower A is delivered to by the first conveying device D1 afterwards, has adsorbed the active carbon of pollutant in Analytic Tower By heating regeneration in A, it is discharged by the second baiting valve 10 of the bottom Analytic Tower A；
3) analytically the active carbon of tower A discharge is divided into two parts；A portion is delivered to by the second conveying device D2 The active carbon entrance of adsorption tower 8, the former flue gas of circulation absorption processing；Another part conveys Analytic Tower A by third conveying device D3 Second charging aperture A02, subsequently into SRG gas dust-removing device 4, which is used to remove dust in SRG gas, The SRG gas that SRG gas collection device 7 collects is discharged after 4 dedusting of SRG gas dust-removing device from SRG gas vent 201.
Embodiment 3
Repeat embodiment 2, only step 2) further include: analytically the active carbon of tower A discharge after the screening of vibrating screen 14, The dust particles in active carbon are removed, the active carbon entrance of adsorption tower 8 is then delivered to by the second conveying device D2 again and are led to Cross the second charging aperture A02 that third conveying device D3 is delivered to Analytic Tower A.
Embodiment 4
Embodiment 3 is repeated, only this method further include: step 4) activity according to needed for handling former flue gas in adsorption tower 8 Treating capacity and the screening of vibrating screen 14 that active carbon is parsed in the amount of charcoal, Analytic Tower A remove the amount of active carbon dust, pass through supplement material Analytically the second charging aperture A02 of tower A supplements new active carbon and enters Analytic Tower A conveyance conduit L.
Step 4) specifically:
A) the former flue gas entered in adsorption tower 8 is detected, and combines contaminant removal efficiency requirement, calculate adsorption tower The amount that the active carbon that former flue gas needs is handled in 8, obtains the discharge quantity M of adsorption tower 81:
1. calculating the SO that adsorption tower 8 need to be handled2, NOx amount: detect former flue gas flow be Q=106Nm3/ h, former cigarette The concentration of sulfur dioxide is in gasThe concentration of former nitrogen oxides in effluent is CNOx=CNOx=300mg/ Nm3, SO2, NOx removal efficiency be respectively 95% and 85%, the SO that adsorption tower 8 need to be handled as a result,2, NOx amount be respectively as follows:
WNOx=ηNOx×Q×CNOx/106=255；………(2)
In formula (1),The SO that need to be handled for adsorption tower 82Amount, units/kg/h；Q is the flow of former flue gas, unit Nm3/ h；For SO in former flue gas2Concentration, unit mg/Nm3；For SO2Removal efficiency；In formula (2), WNOxIt is needed for adsorption tower 8 The amount of the NOx of processing, units/kg/h；CNOxFor the concentration of former nitrogen oxides in effluent, unit mg/Nm3；ηNOxFor the removal of NOx Efficiency；
2. basisAnd WNOx, calculate the discharge quantity M of adsorption tower 81:
In formula (3), M1For the discharge quantity of adsorption tower 8, units/kg/h；k1For the first coefficient, being worth is 15；k2For the second coefficient, Value is 16.
B) according to the relationship of the frequency of the first baiting valve 9 and the discharge quantity of adsorption tower 8, the frequency of the first baiting valve 9 is adjusted For the discharge quantity M with adsorption tower 81Corresponding frequency f1。
C) the target material position L of the second level-sensing device 12 below the first charging aperture A01 of Analytic Tower A is setTarget 2For 3m, the is read The material position L of two level-sensing devices 122For 3m, according to L2With LTarget 2Size relation, adjust the second baiting valve 10 frequency f2, so that L2= LTarget 2:
Work as L2> LTarget 2When, increase the frequency f of the second baiting valve 102；Work as L2< LTarget 2When, reduce the frequency of the second baiting valve 10 Rate f2, finally make L2=LTarget 2。
D) according to the relationship of the frequency of the second baiting valve 10 and the discharge quantity of Analytic Tower A, show that the discharge quantity of Analytic Tower A is With the frequency f of the second baiting valve 102Corresponding discharge quantity M2。
E) outlet active carbon flow M of the vibrating screen 14 by screening below Analytic Tower A is determinedOutlet:
MOutlet=k3×M2；………(4)
And meet: d2/(d1+d2) > k3；………(5)
In formula (4), k3For third coefficient, value 1.5%；M2For the discharge quantity of Analytic Tower A, units/kg/h；In formula (5), d1For the width close to side immediately below first charging aperture A01, between Analytic Tower A inner wall and first partition 5；d2It is removed for SRG gas The width of dirt device 4, i.e., the side immediately below second charging aperture A02, the width between second partition 6 and SRG gas vent 201 Degree；
The active carbon total flow M of second conveying device D2 and third conveying device D3 conveying as a result,2'=M2-MOutlet；It keeps Second conveying device D2 is M to the feeding coal of adsorption tower 81, then second charging aperture A02 of the third conveying device D2 to Analytic Tower A Feeding coal M3=M2'-M1。
F) the target material position L of third level-sensing device 13 below the second charging aperture A02 of Analytic Tower A is setTarget 3For 3m, the is read The material position L of three level-sensing devices 133For 3m, work as L3< LTarget 3When, by supplementing second charging aperture of the material conveying tube road L to Analytic Tower A A02 supplements new active carbon；Work as L3> LTarget 3When, stop supplementing new active carbon into Analytic Tower A；Finally make L3=LTarget 3。
Application Example 1
Parsing activation is carried out to the active carbon containing pollutant using the active carbon Analytic Tower that the embodiment of the present application 1 provides (or regeneration) processing, handles 600m2The flue gas that sintering machine generates passes through activated carbon adsorber treated the activity containing pollutant Charcoal, analytically in the SRG gas of tower SRG gas outlet discharge, dust content is lower than 0.5g/m3。
Application Example 2
The active carbon containing pollutant is carried out using the active carbon Analytic Tower provided application No. is CN201720876280 Parsing activation (or regeneration) processing, handles 600m2Treated containing pollution by activated carbon adsorber for the flue gas that sintering machine generates The active carbon of object, analytically in the SRG gas of tower SRG gas outlet discharge, dust content 1.5g/m3。

Claims (13)

1. a kind of flue gas purification system, which includes Analytic Tower (A), adsorption tower (8), the first conveying device (D1), second defeated Send device (D2), third conveying device (D3)；The Analytic Tower (A) includes bringing-up section (1), changeover portion (2), cooling section (3)；Add Hot arc (1) setting is adding in the top of Analytic Tower (A), cooling section (3) setting in the lower part of Analytic Tower (A), changeover portion (2) setting Between hot arc (1) and cooling section (3)；The side wall of changeover portion (2) is equipped with SRG gas vent (201)；The top of Analytic Tower (A) Equipped with first charging aperture (A01) and second charging aperture (A02)；Underface in changeover portion (2) and positioned at second charging aperture (A02) Equipped with SRG gas dust-removing device (4)；SRG gas dust-removing device (4) is located at the inside of SRG gas vent (201), and SRG gas Dust-extraction unit (4) and SRG gas vent (201) are closely arranged；The active carbon of first conveying device (D1) connection adsorption tower (8) goes out The first charging aperture (A01) of mouth and Analytic Tower (A), the second conveying device (D2) connect the active carbon outlet of Analytic Tower (A) and inhale The active carbon entrance of attached tower (8), third conveying device (D3) connect the of the active carbon outlet of Analytic Tower (A) and Analytic Tower (A) Two feed inlets (A02)；The bottom of adsorption tower (8) is equipped with the first baiting valve (9)；The bottom of Analytic Tower (A) is equipped with the second baiting valve (10)；The second charging aperture (A02) of Analytic Tower (A) is also connect with supplement material conveying tube road (L).
2. flue gas purification system according to claim 1, it is characterised in that: first charging aperture (A01) and second charging aperture (A02) first partition (5) are equipped between；The lower end of first partition (5) is connect with the top of bringing-up section (1)；And/or SRG gas The top side of dust-extraction unit (4) be equipped with second partition (6), and second partition (6) setting with SRG gas vent (201) phase Pair side；The upper end of second partition (6) is connect with the bottom of bringing-up section (1) and lower end connects with SRG gas dust-removing device (4) It connects；
Preferably, first partition (5) and second partition (6) are arranged in parallel with the side where SRG gas vent (201), And second partition (6) setting is in the underface of first partition (5).
3. flue gas purification system according to claim 1 or 2, it is characterised in that: the SRG gas dust-removing device (4) is Active carbon channel layer；It is hatch frame at the top and bottom of active carbon channel layer；
Preferably, the left and right sides of SRG gas dust-removing device (4) is respectively shutter or perforated plate construction.
4. flue gas purification system according to any one of claim 1-3, it is characterised in that: be equipped with SRG in changeover portion (2) Gas collection device (7)；SRG gas dust-removing device (4) is arranged in SRG gas collection device (7) and SRG gas vent (201) Between；
Preferably, SRG gas collection device (7) includes loading plate (701) and is connected in loading plate (701) bottom surface multiple Active carbon circulation passage (702)；There are gap between each active carbon circulation passage (702), the gap is that the circulation of SRG gas is logical Road (703)；Active carbon circulation passage is hatch frame at the top and bottom of (702)；The top of SRG air ventilation passage (703) Portion is loading plate (701), and bottom is hatch frame.
5. flue gas purification system described in any one of -4 according to claim 1, it is characterised in that: adsorption tower is set at the top of (8) There are the first level-sensing device (11)；The second level-sensing device (12) are equipped at the first charging aperture (A01) of Analytic Tower (A)；The of Analytic Tower (A) Third level-sensing device (13) are equipped at two feed inlets (A02)；
Preferably, the lower part of the second baiting valve (10) is equipped with vibrating screen (14).
6. carry out the method for purifying smoke using the flue gas purification system of any of claims 1-5, this method include with Lower step:
1) former flue gas is transported in adsorption tower (8) by the smoke inlet of activated carbon adsorber (8), the activity of adsorption tower (8) Charcoal adsorption treatment original flue gas, the pollutant in former flue gas are adsorbed the activated carbon adsorption in tower (8)；Flue gas after treatment from The exhanst gas outlet of adsorption tower (8) is discharged；
2) active carbon that pollutant has been adsorbed in adsorption tower (8) is discharged by first baiting valve (9) of adsorption tower (8) bottom, Then it is delivered to the first charging aperture (A01) of Analytic Tower (A) by the first conveying device (D1), has adsorbed the active carbon of pollutant By heating regeneration in Analytic Tower (A), it is discharged by second baiting valve (10) of the bottom Analytic Tower (A)；
3) analytically the active carbon of tower (A) discharge is divided into two parts；A portion is delivered to by the second conveying device (D2) The active carbon entrance of adsorption tower (8), the former flue gas of circulation absorption processing；Another part passes through third conveying device (D3) conveying parsing The second charging aperture (A02) of tower (A), subsequently into SRG gas dust-removing device (4), the amount of activated charcoal is for removing SRG gas In dust, the SRG gas that SRG gas collection device (7) collects is after SRG gas dust-removing device (4) dedusting, from SRG gas Body exports (201) discharge.
7. flue gas purifying method according to claim 6, it is characterised in that: step 2) further include: analytically tower (A) is discharged Active carbon by vibrating screen (14) screening after, remove active carbon in dust particles, then again pass through the second conveying device (D2) be delivered to adsorption tower (8) active carbon entrance and by third conveying device (D3) be delivered to the second of Analytic Tower (A) into Material mouth (A02).
8. flue gas purifying method according to claim 7, it is characterised in that: this method further include: step 4) is according to absorption The treating capacity and vibrating screen (14) sieve of the middle parsing active carbon of the amount of active carbon needed for handling former flue gas in tower (8), Analytic Tower (A) The amount for point removing active carbon dust is supplemented new by the second charging aperture (A02) of supplement material conveying tube road (L) analytically tower (A) Active carbon enter Analytic Tower (A).
9. flue gas purifying method according to claim 8, it is characterised in that: step 4) specifically:
A) the former flue gas entered in adsorption tower (8) is detected, and combines contaminant removal efficiency requirement, calculate adsorption tower (8) amount that the active carbon that former flue gas needs is handled in, obtains the discharge quantity M of adsorption tower (8)1；
B) according to the relationship of the frequency of the first baiting valve (9) and the discharge quantity of adsorption tower (8), the frequency of the first baiting valve (9) is adjusted Rate is the discharge quantity M with adsorption tower (8)1Corresponding frequency f1；
C) the target material position L of the second level-sensing device (12) below the first charging aperture (A01) of Analytic Tower (A) is setTarget 2, read second The material position L of level-sensing device (12)2, according to L2With LTarget 2Size relation, adjust the second baiting valve (10) frequency f2, so that L2= LTarget 2；
D) according to the relationship of the frequency of the second baiting valve (10) and the discharge quantity of Analytic Tower (A), the discharge quantity of Analytic Tower (A) is obtained For the frequency f with the second baiting valve (10)2Corresponding discharge quantity M2；
E) outlet active carbon flow M of the vibrating screen (14) by screening below Analytic Tower (A) is determinedOutlet, the second conveying fills as a result, Set the active carbon total flow M of (D2) and third conveying device (D3) conveying2'=M2-MOutlet；Keep the second conveying device (D2) to suction The feeding coal of attached tower (8) is M1, then feeding coal M of the third conveying device (D2) to the second charging aperture (A02) of Analytic Tower (A)3= M2'-M1；
F) the target material position L of third level-sensing device (13) below the second charging aperture (A02) of Analytic Tower (A) is setTarget 3, read third The material position L of level-sensing device (13)3, work as L3< LTarget 3When, by supplementing the second charging aperture of material conveying tube road (L) to Analytic Tower (A) (A02) new active carbon is supplemented；Work as L3> LTarget 3When, stop the active carbon that supplement is new into Analytic Tower (A)；Finally make L3= LTarget 3。
10. flue gas purifying method according to claim 9, it is characterised in that: to entrance adsorption tower (8) described in step a) Interior former flue gas is detected, and is calculated the amount for handling the active carbon that former flue gas needs in adsorption tower (8), is obtained adsorption tower (8) Discharge quantity M1, specifically:
1. calculating the SO that adsorption tower (8) need to be handled2, NOx amount: the flow for detecting former flue gas is Q, former sulfur dioxide in flue gas Concentration beThe concentration of former nitrogen oxides in effluent is CNOx, adsorption tower (8) need to be handled as a result, SO2, NOx amount difference Are as follows:
WNOx=ηNOx×Q×CNOx/106；………(2)
In formula (1),The SO that need to be handled for adsorption tower (8)2Amount, units/kg/h；Q is the flow of former flue gas, unit Nm3/h；For SO in former flue gas2Concentration, unit mg/Nm3；For SO2Removal efficiency；In formula (2), WNOxIt is needed for adsorption tower (8) The amount of the NOx of processing, units/kg/h；CNOxFor the concentration of former nitrogen oxides in effluent, unit mg/Nm3；ηNOxFor the removal of NOx Efficiency；
2. basisAnd WNOx, calculate the discharge quantity M of adsorption tower (8)1:
In formula (3), M1For the discharge quantity of adsorption tower (8), units/kg/h；k1For the first coefficient, k1Value be 5-50, preferably 8-40, More preferably 10-20；k2For the second coefficient, k2Value is 1-40, preferably 3-30, more preferably 5-20.
11. flue gas purifying method according to claim 9 or 10, it is characterised in that: the first baiting valve described in step b) (9) frequency f1With the discharge quantity M of adsorption tower (8)1Relationship specifically: M1=f1×k4×l1×dBetween 1×ρ1/r1×d1 is straight, In: k44th coefficient, l1For the length of the first baiting valve round roller, dBetween 1For the gap of the first baiting valve round roller, ρ1For in adsorption tower Active carbon heap density, r1For the round roller maximum (top) speed of the first baiting valve round roller, d1 is straightFor the diameter of the first baiting valve round roller；k4Value is 0.01-0.2, preferably 0.03-0.15, more preferably 0.05-0.1；And/or
The frequency f of second baiting valve (10) described in step d)2With the discharge quantity M of Analytic Tower (A)2Relationship specifically: M2=f2 ×k5×l2×dBetween 2×ρ2/r2×d2 is straight, in which: k55th coefficient, l2For the length of the second baiting valve round roller, dBetween 2For the second blanking The gap of valve circle roller, ρ2For active carbon heap density, r in Analytic Tower2For the round roller maximum (top) speed of the second baiting valve round roller, d2 is straightIt is The diameter of two baiting valve round rollers；k5Value is 0.01-0.2, preferably 0.03-0.15, more preferably 0.05-0.1.
12. the flue gas purifying method according to any one of claim 9-11, it is characterised in that: adjusted described in step c) The frequency f of second baiting valve (10)2, specifically:
Work as L2> LTarget 2When, increase the frequency f of the second baiting valve (10)2；Work as L2< LTarget 2When, reduce the frequency of the second baiting valve (10) Rate f2, finally make L2=LTarget 2。
13. the flue gas purifying method according to any one of claim 9-12, it is characterised in that: determined described in step e) The outlet active carbon flow M of Analytic Tower (A)Outlet, specifically:
MOutlet=k3×M2；………(4)
And meet: d2/(d1+d2) > k3；………(5)
In formula (4), k3For third coefficient, value range 1%-3%；M2For the discharge quantity of Analytic Tower (A), units/kg/h；Formula (5) in, d1For the width close to side immediately below first charging aperture (A01), between Analytic Tower (A) inner wall and first partition (5)； d2For the width of SRG gas dust-removing device (4), i.e., close to side immediately below second charging aperture (A02), second partition (6) and SRG Width between gas vent (201).
CN201910002301.0A 2019-01-02 2019-01-02 Flue gas purification system and flue gas purification method Active CN109603409B (en)

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