CN106178830A - A kind of method that can activate online and spray demercuration adsorbent simultaneously - Google Patents

A kind of method that can activate online and spray demercuration adsorbent simultaneously Download PDF

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Publication number
CN106178830A
CN106178830A CN201610615746.2A CN201610615746A CN106178830A CN 106178830 A CN106178830 A CN 106178830A CN 201610615746 A CN201610615746 A CN 201610615746A CN 106178830 A CN106178830 A CN 106178830A
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adsorbent
online
active component
demercuration
sleeve
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CN106178830B (en
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赵永椿
杨建平
朱彬彬
张军营
郑楚光
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Huazhong University of Science and Technology
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Huazhong University of Science and Technology
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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
    • B01D53/06—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 moving adsorbents, e.g. rotating beds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/60—Heavy metals or heavy metal compounds
    • B01D2257/602—Mercury or mercury compounds
    • 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

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

Abstract

The invention discloses a kind of method that can activate online and spray demercuration adsorbent simultaneously, mercury absorbent is activated by can activate and spray the device of demercuration adsorbent online simultaneously and sprays by online, wherein, this device includes the injection equipment for spraying mercury absorbent, is arranged on described injection equipment side the online activation mechanism communicated therewith and for monitoring hydrargyrum concentration on-line computing model (11) of mercury in flue gas concentration；The hydrargyrum concentration obtained according to monitoring, dynamically regulates described damper (4)；The most dynamically control valve (9) in the described online activation mechanism of regulation；Thus adsorbent is activated online, and then realize flue gas demercuration.The inventive method achieves the real-time online activation of mercury absorbent, adapt to the frequent fluctuation of hydrargyrum concentration, and improve mercury absorbent and active component utilization ratio largely, reduce the consumption of adsorbent, be greatly saved demercuration cost.

Description

A kind of method that can activate online and spray demercuration adsorbent simultaneously
Technical field
The invention belongs to Mercury In Coal Combustion Flue Gas and control technical field, being specifically related to one can activate online and spray de-simultaneously The method of mercury absorbent.
Background technology
Hydrargyrum is a kind of neurotoxic substance, has extremely strong cumulative bad and irreversibility, has the biggest threat to human health. Coal-burning power plant is one of topmost artificial mercury pollution source.Along with improving constantly of environmental requirement, explore efficient, economy, environment The Mercury vacancy technology of friendly is significant.
In prior art, generally use mercury removal device and utilize the hydrargyrum in efficient absorption material removal flue gas, current master Study and concentrate on demercuration adsorbing material and two aspects of mercury removal device.The research of demercuration adsorbing material is concentrated mainly on and changes Become raw material, use different activation methods, different modifying agent and method of modifying etc., at present, generally use chemical solution immersion Stain method modified adsorbent, as used the chemical solution dipping adsorbent of sulfur-bearing, halide.Main purpose is to improve adsorbent Surface functional group, increases activated adoption position, to improve its chemical adsorption capacity, improves demercuration performance.For mercury removal device, then lead If carry out the removing of mercury in flue gas by improving or optimize the structure of device, increase circulation and stress mechanism etc..
Such as Chinese patent literature 201120257109.2 discloses a kind of coal-fired flue-gas absorption mercury removal device, is directed to Adsorbing demercuration method to coal-fired flue-gas, mercury absorbent enters in the flue of house outlet with spray regime, and adsorbent is in dedusting After flue gas in fully dispersed, can effectively remove the hydrargyrum in flue gas, the mercury absorbent after trapping can be again through blood circulation Secondary use, the method can reduce the consumption of adsorbent, reduces flue gas demercuration cost.
But, this demercuration method there is also certain defect, during demercuration, and its adsorbent time of staying in flue gas Only having the short several seconds, the most i.e. captured by dust arrester, its absorption reaches far away saturated, and the active component of adsorbent outer layer is ginseng With the main body of reaction, this can cause adsorbent internal layer active component utilization rate extremely low.It addition, power plant load, as-fired coal matter, burning Operating mode is changeable, causes mercury in flue gas fluctuation of concentration relatively big, and uses its activity group of adsorbent prepared by chemical solution dipping method The content divided is typically certain, it is impossible to adapt to the frequent fluctuation of hydrargyrum concentration, causes a large amount of wastes of adsorbent, and demercuration cost is big Big increase.
Summary of the invention
For disadvantages described above or the Improvement requirement of prior art, the invention provides one can activate online and spray simultaneously The method of demercuration adsorbent, can make active component presoma and adsorbent energy highly effective reaction generate by the method for the present invention and live Property component, improves mercury absorbent and active component utilization ratio largely, reduces the consumption of adsorbent, be greatly saved Demercuration cost.
For achieving the above object, the present invention provides a kind of method that can activate online and spray demercuration adsorbent simultaneously, logical Crossing and can activate simultaneously and spray the device of demercuration adsorbent online and activate mercury absorbent online and spray, wherein, this can The device of the most online activation and injection demercuration adsorbent includes:
For spraying the injection equipment of mercury absorbent, being arranged on described injection equipment side the online activation communicated therewith Mechanism and for monitoring the hydrargyrum concentration on-line computing model of mercury in flue gas concentration；
Wherein, described injection equipment includes that one end has the spout other end and has the sleeve of adsorbent feeding mouth, this sleeve Sidewall has through hole；Described injection equipment also includes damper, before it is arranged on adsorbent feeding mouth；
Described online activation mechanism includes active component presoma infusion appliance, and its one end is inserted in described through hole, the other end Connect with active component precursor source；Described online activation mechanism also includes control valve, and it is arranged on active component presoma In infusion appliance；
The method comprises the following steps:
Hydrargyrum concentration on-line computing model is utilized to monitor the hydrargyrum concentration in flue gas in real time；
The hydrargyrum concentration obtained according to monitoring, dynamically regulates described damper, when controlling mercury absorbent injection rate and inject Long；Control valve in the described online activation mechanism of simultaneously dynamically regulation, control the injection rate of active component presoma, concentration with And injection length；Described mercury absorbent and active component presoma is made all to inject in the sleeve of described injection equipment；
In described sleeve, described active component presoma is adsorbed agent top layer micropore oriented adsorption, makes active component exist Adsorbent upper epidermis is enriched with, and forms active substance, thus so that adsorbent is activated online；
Adsorbent after activation passes through in the injected injection flue of described injection equipment,
Make the mercury compound in flue gas adsorb at adsorbent surface, and then caught by fume dust remover with adsorbent Obtain, and then realize flue gas demercuration.
As present invention further optimization, described injection equipment also includes adsorbent storage feed bin, and it is arranged on sleeve One end, is provided with agitator, is provided with conveying pipeline between adsorbent storage feed bin and sleeve in adsorbent storage feed bin, agitator is to hydrargyrum Mercury absorbent in adsorbent storage feed bin is stirred, and dynamically regulates described damper, and mercury absorbent is injected by conveying pipeline In sleeve.
As present invention further optimization, described active component presoma injects in sleeve by online activation mechanism, Wherein, described online activation mechanism also includes active component presoma bin, conveyance conduit is additionally provided with heater, heating Described active component presoma is heated to suitable temperature by device, dynamically the control valve in the described online activation mechanism of regulation, Active component presoma is injected in sleeve by active component presoma infusion appliance.
As present invention further optimization, described mercury absorbent is ejected in flue by injection equipment, wherein, described Injection equipment also includes screw rod, and it is set in sleeve, and described screw rod is made up of axostylus axostyle and fin, and fin is fixed on axostylus axostyle And be distributed in the space between screw rod and ferrule barrel inwall, mercury absorbent is at the uniform velocity pushed in flue by axostylus axostyle, and fin can Prevent the reunion of adsorbent and the deposition in sleeve wall, thus improve the dispersion of adsorbent.
By such scheme, assembly of the invention has online activation mechanism and sorbent injection mechanism, activity group simultaneously Dividing presoma infusion appliance to be injected in sleeve by active component presoma, meanwhile, mercury absorbent is injected by adsorbent feeding mouth Sleeve so that active component presoma and adsorbent energy highly effective reaction generate active component, and and then sprayed by described spout, Improve mercury absorbent and active component utilization ratio largely, reduce the consumption of adsorbent.
As present invention further optimization, the emitted dose of described mercury absorbent is sprayed according to hydrargyrum concentration and the adsorbent of monitoring The amount of penetrating m1With the mathematical model between demercuration efficiency η is controlled, described hydrargyrum concentration and sorbent injection amount m1With demercuration efficiency η Between mathematical modulo be according to power plant's operational factor, line size, flue gas flow, set up by test and Theoretical Calculation, i.e.
η = [ 1 - 1 m 1 · K + exp ( - ( 1 + 1 m 1 · K ) ( 6 m 1 K g ρ p d p ) t 1 + 1 m 1 · K ] × 100 %
Wherein, K is the absorption constant (m relevant with temperature, sorbent characteristics3/ kg), corresponding different temperatures, different absorption Agent its vary in size, such as activated carbon when 120 DEG C, K=294m3/kg；KgAlways pass for the material based on phase concentrations difference Matter coefficient,Wherein kgFor External mass transfer coefficient, m/s, corresponding different temperatures kgNumerical values recited is different, such as gas State hydrargyrum is k when 120 DEG Cg=4440m/s；ksFor internal mass transfer coefficient (m/s), corresponding different temperatures, different adsorbent ksNumerical value is big Little difference, such as activated carbon when 120 DEG C, ks=0.016m/s；ρpDensity (kg/m for adsorbent3)；dpGrain for adsorbent Footpath (m).
As present invention further optimization, described demercuration efficiency η is calculated by following formula:
η=f (m1)=(C1-C2)/C1
Wherein, C1For mercury in flue gas concentration, C2For mercury emissions standard.
As present invention further optimization, the emitted dose of described mercury absorbent passes through PID controller (proportional, integral-micro- Sub-controller) control.
As present invention further optimization, described active component presoma injection rate is injected by active component presoma Amount m2Calculated by following formula:
m2=(N1/NA)×VA×ρ
Wherein, N1For active component precursor molecule number N1=(2nm × SBET)/V1,SBETSpecific surface for adsorbent Long-pending, V1Molecular volume for active component presoma；NAFor Avogadro constant number, N under the status of criterionA=6.02 × 1023/ mol；VAFor molar volume of gas, V under the status of criterionA=22.4L/mol, ρ are active component presoma density.
In such scheme, by mercury absorbent emitted dose m1And the mathematical model between demercuration efficiency η and PID controller (proportional-integral derivative controller) dynamically regulates described damper, controls mercury absorbent injection rate and injects duration；Simultaneously By active component presoma injection rate m2With sorbent injection amount m1Between mathematical model, dynamically regulate described online activation Control valve in mechanism, controls the injection rate of active component presoma, concentration and injection length, makes active component in absorption Agent upper epidermis is enriched with, active component presoma should at adsorbent surface uniformly, be completely covered, avoid active component excess again Load, adversely affects hydrargyrum internal diffusion in adsorbent, so that the demercuration performance of adsorbent reaches the same of optimum Time avoid active component to waste.
As present invention further optimization, described active component presoma is H2S、SO2, in HCl and Br at least one.
As present invention further optimization, described active substance is at least one in S, Cl and Br.
In general, by the contemplated above technical scheme of the present invention compared with prior art, owing to providing one Can activate simultaneously and spray the device and method of demercuration adsorbent online, it is possible to obtain following beneficial effect:
(1) method of the present invention is sprayed by having the device of online activation mechanism and sorbent injection mechanism simultaneously Penetrating, wherein active component presoma is injected in sleeve by active component presoma infusion appliance, and meanwhile, mercury absorbent is by absorption Agent feeding mouth injects sleeve so that active component presoma and adsorbent energy highly effective reaction generate active component, and and then pass through Described spout sprays, and improves mercury absorbent and active component utilization ratio largely, reduces the consumption of adsorbent.
(2) method of the present invention passes through mercury absorbent emitted dose m1With mathematical model and the PID between demercuration efficiency η controls Device dynamically regulates described damper, controls mercury absorbent injection rate and injects duration；Noted by active component presoma simultaneously Enter amount m2With sorbent injection amount m1Between mathematical model, dynamically the control valve in the described online activation mechanism of regulation, controls The injection rate of active component presoma, concentration and injection length, make active component top layer on the sorbent be enriched with, active component Presoma should at adsorbent surface uniformly, be completely covered, avoid active component excessive load again, to hydrargyrum in adsorbent Internal diffusion adversely affects, so that the demercuration performance of adsorbent avoids active component to waste while reaching optimum.
(3) opening by the hydrargyrum concentration in hydrargyrum concentration monitor monitoring flue gas, dynamic control and regulation air door and control valve Degree, and heated by heater so that active component presoma and adsorbent energy highly effective reaction generate active component, it is achieved hydrargyrum is inhaled The real-time online activation of attached dose, thus adapt to the frequent fluctuation of hydrargyrum concentration.
Accompanying drawing explanation
Fig. 1 is can the activating online and spray the device related in the method for demercuration adsorbent simultaneously of the embodiment of the present invention Structural representation.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and It is not used in the restriction present invention.If additionally, technical characteristic involved in each embodiment of invention described below The conflict of not constituting each other just can be mutually combined.
Fig. 1 is can activating online simultaneously and spraying injection involved in the method for demercuration adsorbent of the embodiment of the present invention The structural representation of device.As it is shown in figure 1, this device includes injection equipment and is arranged on injection equipment side and communicates therewith Activate mechanism online.
Such as Fig. 1, injection equipment includes screw rod, sleeve 3, damper 4, adsorbent storage feed bin 5, agitator 6 and conveying Pipe 7.Wherein, screw sleeve is located in sleeve 3, and the most sheathed, described screw rod is made up of axostylus axostyle 1 and fin 2, fin 2 It is fixed on axostylus axostyle 1 and is distributed in the space between axostylus axostyle 1 and cylinder inboard wall.Adsorbent storage feed bin 5 is arranged on the one of sleeve 3 End, is upper end shown in Fig. 1, and the other end of sleeve 3 is spout, and adsorbent storage feed bin 5 is used for storing adsorbent.
Having at least one through hole on the sidewall of sleeve 3, the most two or more, each through hole can be distributed in sleeve 3 Side, or be symmetrically distributed in both sides, it is also possible to mal-distribution is in the side of different directions.
Agitator 6 it is provided with in adsorbent storage feed bin 5, for the adsorbent in adsorbent storage feed bin 5 is stirred, To inject in sleeve 3.Conveying pipeline 7 it is provided with so that adsorbent storage feed bin 5 and sleeve 3 between adsorbent storage feed bin 5 and sleeve 3 Connected by this conveying pipeline 7, for the adsorbent in adsorbent storage feed bin 5 is injected in sleeve 3.It is provided with tune on conveying pipeline 7 Joint air door 4, for regulating the aperture of conveying pipeline 7, thus controls amount and entry time that adsorbent enters.
Adsorbent is entered in sleeve 3 by conveying pipeline under the drive of agitator 6, and regulates adsorbent by damper 4 Emitted dose.After adsorbent enters in sleeve 3, axostylus axostyle 1 being at the uniform velocity pushed in flue by adsorbent, wherein fin 2 can prevent from inhaling Attached dose occurs to reunite and deposit on sleeve 3 wall, improves adsorbent dispersion.
Such as Fig. 1, online activation mechanism includes active component presoma infusion appliance 8, control valve 9, active component presoma Bin 10.Wherein, active component presoma infusion appliance 8 is preferably cylinder structure, and its one end is inserted and offered on the barrel of sleeve 3 Perforate in, the other end is connected with active component presoma bin 10 by conveyance conduit, is used for active component presoma Active component presoma in bin 10 injects in sleeve 3.Inject it addition, control valve 9 is arranged on active component presoma On device 8, it can control the break-make of active component presoma infusion appliance 8 and sleeve 3, thus controls to inject the activity in sleeve 3 The injection rate of component presoma, concentration and injection length.
Preferably, conveyance conduit being additionally provided with heater 12, it is at described active component presoma bin 10 It is heated to suitable temperature before injecting adsorbent spray gun, makes active component presoma and adsorbent energy highly effective reaction generate Active component.
Online activation mechanism quantity is preferably identical with the side-wall hole quantity of sleeve 3, and activation device is at least one the most online Individual, the most two or more, correspondingly, the distribution mode of each online activation mechanism and the distribution mode one of through hole on sleeve Cause, specifically, the side of sleeve 3 can be distributed in, or be symmetrically distributed in both sides, it is also possible to mal-distribution is at different directions Side.
Also include hydrargyrum concentration on-line computing model 11, its hydrargyrum concentration data in monitoring flue in real time, preferably hydrargyrum concentration On-line computing model 11 is multiple, such as two, is separately positioned on injection equipment and the online activation mechanism left and right sides.Control valve The aperture of 9 can be adjusted according to the feedback data of hydrargyrum concentration on-line computing model 11.
Simultaneously can activating online and spray demercuration adsorbent method, by above-mentioned injection apparatus of one embodiment of the invention Carry out, specifically comprising the following steps that of the method
(1) hydrargyrum concentration on-line computing model 11 is utilized to monitor the hydrargyrum concentration in flue gas in real time；
(2) the hydrargyrum concentration obtained according to monitoring, dynamically regulates described damper 4, controls mercury absorbent injection rate and note Enter duration；
1) according to hydrargyrum concentration and sorbent injection amount m of monitoring1And the mathematical model between demercuration efficiency η；
2) according to power plant's operational factor, line size, flue gas flow, hydrargyrum concentration and suction are set up by test and Theoretical Calculation Attached dose of emitted dose m1And the mathematical modulo between demercuration efficiency η, i.e.
η = [ 1 - 1 m 1 · K + exp ( - ( 1 + 1 m 1 · K ) ( 6 m 1 K g ρ p d p ) t 1 + 1 m 1 · K ] × 100 %
Wherein, K is the absorption constant (m relevant with temperature, sorbent characteristics3/ kg), corresponding different temperatures, different absorption Agent its vary in size, such as activated carbon when 120 DEG C, K=294m3/kg；KgAlways pass for the material based on phase concentrations difference Matter coefficient,Wherein kgFor External mass transfer coefficient, m/s, corresponding different temperatures kgNumerical values recited is different, such as gas State hydrargyrum is k when 120 DEG Cg=4440m/s；ksFor internal mass transfer coefficient (m/s), corresponding different temperatures, different adsorbent ksNumerical value is big Little difference, such as activated carbon when 120 DEG C, ks=0.016m/s；ρpDensity (kg/m for adsorbent3)；dpGrain for adsorbent Footpath (m)；
3) by following formula calculating demercuration efficiency η:
η=f (m1)=(C1-C2)/C1
Wherein, C1For mercury in flue gas concentration, C2For mercury emissions standard；
4) emitted dose of mercury absorbent is controlled by PID controller (proportional-integral derivative controller)；
5) mercury absorbent in mercury absorbent storage bin 5 is stirred by agitator 6,
6) described damper 4 is dynamically regulated；
7) mercury absorbent is injected in sleeve 3 by conveying pipeline 7；
(3) the most dynamically described online control valve 9 activated in mechanism of regulation, the injection of control active component presoma Amount, concentration and injection length；
1) by following formula calculated activity component presoma injection rate m2:
m2=(N1/NA)×VA×ρ
Wherein, N1For active component precursor molecule number N1=(2nm × SBET)/V1,SBETSpecific surface for adsorbent Long-pending, V1Molecular volume for active component presoma；NAFor Avogadro constant number, N under the status of criterionA=6.02 × 1023/ mol；VAFor molar volume of gas, V under the status of criterionA=22.4L/mol, ρ are active component presoma density；
2) the active component presoma during heater 12 will be stored in active component presoma memorizer 10 is heated to properly Temperature；
3) control valve 9 in described online activation mechanism is dynamically regulated；
4) active component presoma is injected in sleeve 3 by active component presoma infusion appliance；
(4) active component presoma is adsorbed agent top layer micropore oriented adsorption, makes active component top layer on the sorbent rich Collection, forms active substance.
Wherein, described active component presoma is H2S、SO2, in HCl and Br at least one；Described active substance is S, Cl With in Br at least one；
(5) adsorbent after activation is sprayed in injection flue by fin 2 under gravity；
(6) mercury compound in flue gas adsorbs at adsorbent surface, and then is caught by fume dust remover with adsorbent Obtain, and then realize flue gas demercuration.
As it will be easily appreciated by one skilled in the art that and the foregoing is only presently preferred embodiments of the present invention, not in order to Limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, all should comprise Within protection scope of the present invention.

Claims (10)

1. the method that can activate online and spray demercuration adsorbent simultaneously, it is by can activate online and spray demercuration simultaneously Mercury absorbent is activated and sprays by the device of adsorbent online, and wherein, this can activate online simultaneously and spray demercuration absorption The device of agent includes:
For spray mercury absorbent injection equipment, be arranged on described injection equipment side and communicate therewith activate mechanism online And for monitoring hydrargyrum concentration on-line computing model (11) of mercury in flue gas concentration；
Wherein, described injection equipment includes that one end has the spout other end and has the sleeve (3) of adsorbent feeding mouth, this sleeve (3) sidewall has through hole；Described injection equipment also includes damper (4), before it is arranged on adsorbent feeding mouth；
Described online activation mechanism includes active component presoma infusion appliance (8), and its one end is inserted in described through hole, the other end with Active component precursor source connects；Described online activation mechanism also includes control valve (9), and it is arranged on active component presoma In infusion appliance (8)；
The method comprises the following steps:
Utilize the hydrargyrum concentration in hydrargyrum concentration on-line computing model (11) monitoring flue gas in real time；
The hydrargyrum concentration obtained according to monitoring, dynamically regulates described damper (4), when controlling mercury absorbent injection rate and inject Long；Control valve (9) in the described online activation mechanism of simultaneously dynamically regulation, controls the injection rate of active component presoma, dense Degree and injection length；Described mercury absorbent and active component presoma is made all to inject in the sleeve of described injection equipment；
Described active component presoma is adsorbed agent top layer micropore oriented adsorption in described sleeve, makes active component at adsorbent Upper epidermis is enriched with, and forms active substance, thus so that adsorbent is activated online；
Adsorbent after activation is by the injected injection flue of described injection equipment；
Mercury compound in flue gas adsorbs at adsorbent surface, and is captured by fume dust remover with adsorbent, thus real Existing flue gas demercuration.
A kind of method that can activate online and spray demercuration adsorbent simultaneously the most according to claim 1, wherein, described spray Penetrating mechanism and also include adsorbent storage feed bin (5), it is arranged on one end of sleeve (3), and adsorbent storage feed bin is provided with stirring in (5) Device (6), is provided with conveying pipeline (7) between adsorbent storage feed bin (5) and sleeve (3), agitator (6) is for mercury absorbent storing Mercury absorbent in storehouse (5) is stirred, and described damper (4) is arranged on described conveying pipeline (7), and mercury absorbent passes through institute State conveying pipeline (7) to inject in sleeve (3).
A kind of method that can activate online and spray demercuration adsorbent simultaneously the most according to claim 1, wherein, described work Property component presoma inject in sleeve (3) by online activation mechanism, wherein, described online activation mechanism also includes active component Presoma bin (10) and heater (12), described heater (12) is for being heated to described active component presoma properly Temperature, to be injected in sleeve (3) by active component presoma infusion appliance.
A kind of method that can activate online and spray demercuration adsorbent simultaneously the most according to claim 1 and 2, wherein, institute Stating mercury absorbent to be ejected in flue by injection equipment, wherein, described injection equipment also includes screw rod, and it is set in sleeve (3) in, described screw rod is made up of axostylus axostyle (1) and fin (2), and fin (2) is fixed on axostylus axostyle (1) and above and is distributed in screw rod (1) And in the space between sleeve (3) cylinder inboard wall, mercury absorbent is at the uniform velocity pushed in flue by axostylus axostyle (1) after activating online, wing Sheet (2) can prevent the reunion of adsorbent and the deposition on sleeve (3) wall, thus improves the dispersion of adsorbent.
A kind of method that can activate online and spray demercuration adsorbent simultaneously the most according to claim 1 and 2, wherein, institute State the emitted dose of mercury absorbent according to the hydrargyrum concentration monitored and sorbent injection amount m1With the mathematical model between demercuration efficiency η enters Row controls, described hydrargyrum concentration and sorbent injection amount m1With the mathematical modulo between demercuration efficiency η is according to power plant's operational factor, pipe Road size, flue gas flow, set up by test and Theoretical Calculation, i.e.
Wherein, K is the absorption constant relevant with temperature, sorbent characteristics；KgFor the total mass transfer of the material based on phase concentrations difference Coefficient,Wherein kgFor External mass transfer coefficient, ksFor internal mass transfer coefficient；ρpFor the density of adsorbent, dpFor The particle diameter of adsorbent.
A kind of method that can activate online and spray demercuration adsorbent simultaneously the most according to claim 5, wherein, described de- Hydrargyrum efficiency eta is calculated by following formula:
η=f (m1)=(C1-C2)/C1
Wherein, C1For mercury in flue gas concentration, C2For mercury emissions standard.
A kind of method that can activate online and spray demercuration adsorbent simultaneously the most according to claim 1 and 2, wherein, institute The emitted dose stating mercury absorbent is controlled by PID controller.
8. according to a kind of method that can activate online and spray demercuration adsorbent described in claim 1 or 3, wherein, institute simultaneously State active component presoma injection rate and pass through m2Calculated by following formula:
m2=(N1/NA)×VA×ρ
Wherein, N1For active component precursor molecule number；NAFor Avogadro constant number；VAFor molar volume of gas；ρ is for living Property component presoma density.
9. according to a kind of method that can activate online and spray demercuration adsorbent according to any one of claim 1-3 simultaneously, Wherein, described active component presoma is H2S、SO2, in HCl and Br at least one.
10. according to a kind of method that can activate online and spray demercuration adsorbent according to any one of claim 1-3 simultaneously, Wherein, during described active substance is S, Cl and Br at least one.
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CN109158082B (en) * 2018-09-25 2020-05-19 华中科技大学 Demercuration method based on porous carbon online activation

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