CN105311925B - Control the extensive Adsorbent modification coupling spraying system of flue gas heavy metal pollutant emission - Google Patents
Control the extensive Adsorbent modification coupling spraying system of flue gas heavy metal pollutant emission Download PDFInfo
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Abstract
The invention discloses the adsorbent for belonging to flue gas heavy metal Pollutant Control Technology field to be modified coupling spraying system on a large scale.The system mainly includes：Storage tank, dispenser, feed arrangement, improved chemical tank, modified main frame, cyclone separator, bunker for collecting, feeder, gas-solid mixing accelerator, injection pipe and air compressor etc..Adsorbent and medicament add in modified main frame according to a certain percentage in work, react and carry out chemical modification；Modified adsorbent enters gas-solid mixing accelerator by feeder control；Adsorbent and gas mix according to certain ratio in gas-solid mixing accelerator, then along pollutant in adsorbing and removing flue gas in conveyance conduit penetrating flue.The system is applied to the removing of the pollutants such as heavy metal in flue gas (mercury, arsenic, lead, cadmium, chromium etc.) pollutant and sour gas such as sulfur trioxide and hydrogen chloride.The present invention can realize that adsorbent scene is extensive modified, have the characteristics of continuity and closure.
Description
Technical field
Patent of the present invention belongs to flue gas heavy metal pollutant emission control technology field, in more particularly to a kind of control flue gas
The extensive Adsorbent modification coupling spraying system of heavy metal contaminants discharge.Specifically refer to realize at the scene such as coal-burning power plant and inhale
The attached dose of coupling Geldart-D particle and spraying system being modified on a large scale, pass through to adsorb and realize removing various pollutants in fume, it is such as heavy
Metal (mercury, arsenic, lead, cadmium, chromium) and highly acid gas (sulfur trioxide and hydrogen chloride) etc..
Background technology
Heavy metal has enriching, it is difficult to degrade in the environment, is discharged into extraneous heavy metal and its compound to human body
Health and ecological environment have harm big.By taking heavy metal Hg as an example, mercury contaminants have the spies such as chemical property stabilization, high volatility
Point, while mercury contaminants have cumulative bad in natural environment and biologic artifact, so mercury pollution problem is gradually drawn in air
Play the attention of people.The mercury that the flue gases such as coal-burning power plant are discharged is the main source of air mercury pollution, can shape in coal combustion process
Into a large amount of gaseous mercuries, gaseous mercury can be discharged into air together with flue gas.Adsorbing the gaseous mercury in flue gas by adsorbent is
One of coal-fired flue-gas mercury pollution control technology of main flow.In the technology, sorbent injection is usually adsorbed into flue gas into flue
In gaseous mercury.Conventional adsorbent includes carbon-based adsorbent activated carbon and non-carbon base adsorbent ash adsorbent like flying etc..Inhale
Attached physical absorption ability is relatively weak including physical absorption and chemisorbed, in order to improve the adsorption capacity of adsorbent, generally needs
Chemical modification is carried out to adsorbent.
Activated carbon specific surface area is larger, and adsorption capacity is stronger, but expensive.Non-carbon base adsorbent ash like flying is coal-fired electricity
A kind of industrial solid castoff that the coal dust of factory is discharged after burning, it is cheap, while have very big storage.China is to powder
The utilization rate of coal ash is mainly used in the industries such as building, cement only between 30%~40%.But flying dust is to gaseous mercury adsorptivity
Difference, so being modified with greater need for flying dust, develop new flying dust base adsorbent.
Chinese patent CN102120174A discloses a kind of method for flyash impregnate modification using halogen,
Adsorbent needs to impregnate 3~12 hours in halide salt solution in this method, then dries 12 hours, finally needs to be put into vacuum
Dried 24 hours in baking oven.The method of modifying is applied to the research of laboratory scale, it is difficult to meets the larger fire coal electricity of exhaust gas volumn
The emitted dose of adsorbent needed for factory etc..Therefore, how to carry out extensive modification to adsorbent in coal-burning power plant is current urgent need solution
Certainly the problem of.
Chinese patent CN201614359U discloses a kind of continuous powder surface modifier, and this modifying agent is applied to nothing
Machine Non-Metallic Mineral filler carries out surface modification, and material is produced in modifying process by the strong friction between stator, rotor
Temperature be 100~125 DEG C, the fusing point of medicament is generally below 100 DEG C, in modified main frame the mixing of material and medicament be solid and
The mixing of liquid is to reach the effect of powder surface modification.
Adsorbent used in sorbent injection demercuration technology is produced with the offline mode of production at present, automaticity
It is relatively low, and modified adsorbent moisture content is higher than former adsorbent, and accumulation overlong time easily causes caking, it is more difficult to meets coal-fired electricity
The heavy metal contaminants demands such as the continuous operation removing mercury in the scene such as factory.In order to realize to heavy metal contaminants such as mercury in flue gas and
The control of highly acid gas pollutant, it is significant to develop the situ modified coupling spraying system of extensive adsorbent.
The content of the invention
The present invention seeks to propose a kind of extensive Adsorbent modification for realizing control heavy metal in flue gas pollutant emission
Couple spraying system.Characterized in that, the modification of adsorbent is carried out with injection simultaneously, extensive modification, institute can be realized at the scene
System is stated all to be controlled in real time using automatically controlled.Tested through demo-plant, system control heavy metal (mercury, arsenic, lead, cadmium,
Chromium) pollution and the pollutant ability such as highly acid gas such as sulfur trioxide and hydrogen chloride it is strong, it is more suitable for industrial process flue gas
The control of pollutant.
Extensive modified coupling injection is accomplished by the following way in the present invention：
Deposit original unmodified adsorbent in described adsorbent storage batch can 1, frequency conversion is entered by dispenser 2 during work
In feed arrangement 3, improved chemical is placed in improved chemical tank 4.
Adsorbent and improved chemical add in modified main frame 5 according to a certain percentage, and unmodified adsorbent is in modified main frame
Generation high velocity impact simultaneously reacts, and modified adsorbent adsorption capacity greatly improves, while is not in adsorbent caking
Phenomenon.
Described improved chemical tank 4 and the modified material of main frame 5 are stainless steels or Teflon coating is sprayed in inside, it is corrosion-resistant and
Wear resistance is strong.
Described air-introduced machine 7 provides negative pressure for extensive reforming system, and modified adsorbent is entered by the effect of air-introduced machine 7
Enter in cyclone separator 6, the outlet of air-introduced machine 7 is connected with conveyance conduit, can so ensure that Adsorbent modification couples spraying system
Closure, in the absence of quality of material lose.
After modified adsorbent in described cyclone separator 6 enters bunker for collecting 8, controlled by feeder 11 into gas-solid
Accelerator 12 is mixed, the charging rate and the charging rate of dispenser 2 of feeder 11 are basically identical, ensure extensive modified coupling
The continuity of spraying system.
The described conveying radius of curvature of elbow 13 is 6~12 times of caliber, and inner-walls of duct linings 3~5mm earthenwares, effectively
Ground improves the service life of conveying elbow.
Described roots blower 9 is the driving element of sorbent injection system, and exhaust-valve 10 plays regulation transfer pipeline institute
The effect of required airflow.When system pressure loss is excessive, roots blower 9 can use air compressor instead.
The described feeding manner of injection pipe 14 is that both ends are fed simultaneously, and now pipeline internal particle and pressure distribution be more
Uniformly, the adsorbent dispersion effect being ejected into flue 15 is good, prevents line clogging.The modified coupling on a large scale of described adsorbent
All control elements are controlled by electric-control system 16 in spraying system, simple to operate, improve operating efficiency.
The gas and adsorbent adverse current that described check-valves 17 is used to prevent in conveyance conduit.
Described air compressor 18, which serves, to be blown stifled, and when injection pipe 14 blocks, system is automatically stopped operation,
Air compressor 18 is started working, and injection pipe blow stifled.
The beneficial effect that the present invention is implemented includes：
1) present invention realizes live extensive Adsorbent modification coupling injection, and modification and the injection of adsorbent are entered simultaneously
OK, the continuity by adsorption method reduction pollutant technical process is ensured；
2) this invention ensures that the closure of system, no dust fly to overflow, the effect of Adsorbent modification and injection coupling is good, no
Material mass loss be present, prevent material from polluting environment；
3) present invention ensures to be less than 3% by extensive modified adsorbent moisture content, meets the requirement of Geldart-D particle,
High velocity impact occurs in modifying machine for adsorbent simultaneously, and caking phenomenon is reduced, and whole conveying and course of injection are not susceptible to block,
System operation reliability is high；
4) present invention realizes automation, and groundwork element is placed on ground, it is not necessary to and it is transported on platform and works, it is whole
System control component is covered by electric control system controls, it is simple to operate.
Brief description of the drawings
Fig. 1 is the adsorbent of the present invention modified process chart for coupling spraying system on a large scale.
Wherein label in figure：
1st, storage tank；2nd, dispenser；3rd, frequency conversion feed arrangement；4th, improved chemical tank；5th, modified main frame；6th, cyclonic separation
Device；7th, air-introduced machine；8th, bunker for collecting；9th, roots blower；10th, exhaust-valve；11st, feeder；12nd, gas-solid mixing accelerator；13rd, it is defeated
Send elbow；14th, injection pipe；15th, flue；16th, electric-control system；17th, check-valves；18th, air compressor.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
The present invention proposes a kind of extensive Adsorbent modification coupling spraying system, as shown in figure 1, including：Adsorbent storing
Tank 1, rotation dispenser 2, frequency conversion feed arrangement 3, improved chemical tank 4, modified main frame 5, cyclone separator 6, air-introduced machine 7, collection material
Bucket 8, roots blower 9, exhaust-valve 10, feeder 11, gas-solid mixing accelerator 12, conveying elbow 13, injection pipe 14, flue
15th, electric-control system 16, check-valves 17 and air compressor 18.Described system includes two parts：Extensive reforming system and
Spraying system, two systems coordinate operation, ensure that the continuity and closure of coupled system.
The extensive reforming system includes feed arrangement and modification and material-gathering device, and 1,2,3,4 compositions adsorb before modified
Agent and medicament feed arrangement, adsorbent and medicament add in modified main frame 5 according to a certain percentage, complete to change in modified main frame 5
Property；By the effect of air-introduced machine 7, the modified adsorbent from modified main frame 5 out enters cyclonic separation along connecting pipe
Separated in device 6, wherein adsorbent falls on the bottom of cyclone separator, and air is exported into conveyance conduit by air-introduced machine 7.
The spraying system includes Pneumatic conveyer and injection pipe, 9 and 10 composition inlet ducts；8 and 11 compositions are inhaled
Attached dose of feed arrangement.Adsorbent and gas mix according to certain ratio in gas-solid mixing accelerator 12, then along delivery pipe
Road is flowed at injection pipe 14, uniform to spray into flue 15.
Described frequency conversion feed arrangement 3 carries heater, when being worked under the working environment of cold, opens heating dress
Put, ensure reforming system normal operation.
The material of improved chemical tank 4 is that Teflon coating is sprayed in stainless steel or inside, and carries electrically heated rod, ensures to change
Sexual system can be run under the working environment of cold.
The material of modified main frame 5 is that Teflon coating is sprayed in stainless steel or inside, wear-resistant, corrosion-resistant.
Described conveying elbow 13 linings 3~5mm thickness earthenwares, the wear resistance of enhancing conveying elbow in inner-walls of duct.
When described injection pipe 14 blocks, system is automatically stopped operation, and air compressor 18 is started working, to spray
Penetrate pipeline blow it is stifled.
The present invention can be summarized with others without prejudice to the concrete form of the spirit or central characteristics of the present invention.Therefore, originally
The embodiment above of invention can only all be considered the description of the invention and can not limit the present invention, and claims indicate
The scope of the present invention, and above-mentioned explanation does not point out the scope of the present invention all.Therefore, with claims of the present invention
Any change in suitable implication and scope, all it is considered as being included within the scope of the claims.
Claims (8)
1. a kind of extensive Adsorbent modification coupling injection method for realizing control heavy metal in flue gas pollutant emission, its feature
It is, this method includes carrying out Adsorbent modification at the scene, and modified adsorbent is delivered directly into spraying system, is formed
Live Adsorbent modification and the technique of injection integration, modified sorbent injection is used to adsorb in flue gas into flue
Pollutant, the pollutant include heavy metal and highly acid gas, and methods described includes modification procedure and injecting step, wherein
The modification procedure includes：Original unmodified adsorbent is delivered to frequency conversion charging from adsorbent storage batch can (1) through dispenser (2)
In device (3), the improved chemical in adsorbent and improved chemical tank (4) from frequency conversion feed arrangement (3) out is according to certain
Ratio is added in modified main frame (5), and high velocity impact occurs in modified main frame (5) for original unmodified adsorbent and reacted to change
Property, in the presence of air-introduced machine (7), the modified adsorbent come out from modified main frame (5) is collected by cyclone separator (6)；
The injecting step includes：After the modified adsorbent isolated from cyclone separator (6) enters bunker for collecting (8), by
Feeder (11) control enters gas-solid mixing accelerator (12), modified adsorbent and the air from roots blower (9) suction
Mixed in gas-solid mixing accelerator (12) according to certain ratio, injection pipe (14) place flowed to then along conveyance conduit,
Modified adsorbent is uniformly sprayed into flue (15) by multiple injection pipes, roots blower (9) and feeder (11)
Between pipeline on be connected with exhaust-valve (10), in the conveyance conduit between gas-solid mixing accelerator (12) and injection pipe (14)
It is provided with conveying elbow (13) and check-valves (17), injection pipe (14) is connected with air compressor (18)；Institute in methods described
There is control element to be controlled by electric-control system (16)；Frequency conversion feed arrangement (3) carries heater, and improved chemical tank (4) material is
Teflon coating is sprayed in stainless steel or inside, and carries electrically heated rod, ensures that the modification procedure can be in the working environment of cold
Lower operation；The feeding manner of injection pipe (14) is that both ends are fed simultaneously, promotes pipeline internal particle and pressure distribution more equal
Even, the adsorbent dispersion effect being ejected into flue (15) is good, and prevents line clogging.
2. Adsorbent modification according to claim 1 couples injection method, it is characterised in that the heavy metal include mercury,
Arsenic, lead, cadmium or chromium, the highly acid gas include sulfur trioxide and hydrogen chloride.
3. Adsorbent modification according to claim 1 couples injection method, it is characterised in that methods described realizes absorption
The extensive continuous modification in agent scene, by mixing and reacting in modifying process, the physicochemical properties and structure of adsorbent occur
Change, improve the activity of adsorbent.
4. Adsorbent modification according to claim 1 couples injection method, it is characterised in that being modified main frame (5) material is
Teflon coating is sprayed in stainless steel or inside, wear-resistant, corrosion-resistant, and unmodified adsorbent passes through high-speed stirring inside modified main frame
Mix, collide, be not in caking phenomenon.
5. Adsorbent modification according to claim 1 couples injection method, it is characterised in that system pressure loss is excessive
When, roots blower (9) can use air compressor instead.
6. Adsorbent modification according to claim 1 couples injection method, it is characterised in that conveying elbow (13) is in pipeline
Inwall linings 3~5mm thickness earthenwares, the wear resistance of enhancing conveying elbow, improves system service life.
7. Adsorbent modification according to claim 1 couples injection method, it is characterised in that described check-valves (17) is used
In preventing gas in conveyance conduit and adsorbent adverse current.
8. Adsorbent modification according to claim 1 couples injection method, it is characterised in that described air compressor
(18) serve and blow stifled, when injection pipe (14) blocks, system is automatically stopped operation, and air compressor (18) starts work
Make, injection pipe blow stifled.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410261836.7A CN105311925B (en) | 2014-06-11 | 2014-06-11 | Control the extensive Adsorbent modification coupling spraying system of flue gas heavy metal pollutant emission |
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| CN201410261836.7A CN105311925B (en) | 2014-06-11 | 2014-06-11 | Control the extensive Adsorbent modification coupling spraying system of flue gas heavy metal pollutant emission |
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| CN105311925B true CN105311925B (en) | 2018-01-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106178834B (en) * | 2016-08-26 | 2018-02-27 | 福建龙净环保股份有限公司 | Active carbon powder injection apparatus |
| JP6749209B2 (en) * | 2016-10-21 | 2020-09-02 | 日立造船株式会社 | Chemical injection device and combustion exhaust gas treatment facility |
| CN109821350A (en) * | 2019-02-18 | 2019-05-31 | 浙江菲达环保科技股份有限公司 | A kind of Hg/SO based on intermediate injection3The electric-bag complex dust collector of cooperation-removal |
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| CN1665947A (en) * | 2002-05-06 | 2005-09-07 | 小西德尼·G·尼尔逊 | Sorbents and methods for the removal of mercury from combustion gases |
| CN1943842A (en) * | 2004-10-08 | 2007-04-11 | 阿尔斯托姆科技有限公司 | Control of mercury emissions from solid fuel combustion |
| CN101496980A (en) * | 2009-01-08 | 2009-08-05 | 重庆大学 | Method for removing mercury from flue gas |
| CN201545512U (en) * | 2009-06-10 | 2010-08-11 | 陈毅 | Limestone continuous conveying system |
| CN202038725U (en) * | 2011-05-03 | 2011-11-16 | 陈和平 | Material pipeline drying or pneumatic conveying equipment with abrasion-free device |
| CN202609584U (en) * | 2012-03-30 | 2012-12-19 | 日氟荣航空新材料（上海）有限公司 | Vacuum suction device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2557159C (en) * | 2004-03-22 | 2010-05-25 | The Babcock & Wilcox Company | Dynamic halogenation of sorbents for the removal of mercury from flue gases |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1665947A (en) * | 2002-05-06 | 2005-09-07 | 小西德尼·G·尼尔逊 | Sorbents and methods for the removal of mercury from combustion gases |
| CN1943842A (en) * | 2004-10-08 | 2007-04-11 | 阿尔斯托姆科技有限公司 | Control of mercury emissions from solid fuel combustion |
| CN101496980A (en) * | 2009-01-08 | 2009-08-05 | 重庆大学 | Method for removing mercury from flue gas |
| CN201545512U (en) * | 2009-06-10 | 2010-08-11 | 陈毅 | Limestone continuous conveying system |
| CN202038725U (en) * | 2011-05-03 | 2011-11-16 | 陈和平 | Material pipeline drying or pneumatic conveying equipment with abrasion-free device |
| CN202609584U (en) * | 2012-03-30 | 2012-12-19 | 日氟荣航空新材料（上海）有限公司 | Vacuum suction device |
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