CN104458804B - Device for forming oxidative Cl in smoke under oxygen-enriched combustion atmosphere - Google Patents
Device for forming oxidative Cl in smoke under oxygen-enriched combustion atmosphere Download PDFInfo
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- CN104458804B CN104458804B CN201410736127.XA CN201410736127A CN104458804B CN 104458804 B CN104458804 B CN 104458804B CN 201410736127 A CN201410736127 A CN 201410736127A CN 104458804 B CN104458804 B CN 104458804B
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- oxidisability
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- flue gas
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Abstract
The invention discloses a device for forming oxidative Cl in smoke under an oxygen-enriched combustion atmosphere. A feeding device comprises a mass flow controller connected with a gas source, a fluidized bed feeder and an electric gas preheating tube; the fluidized bed feeder is connected with the mass flow controller and the electric gas preheating tube by control valves; a combusting device comprises a vertical reaction furnace; an inlet end of the vertical reaction furnace is communicated with an outlet end of the fluidized bed feeder; a detecting device comprises temperature detectors and an oxidative Cl detector; the inlet end and the outlet of the vertical reaction furnace and a connected end of the electric gas preheating tube and the fluidized bed feeder are all respectively provided with one temperature detector; the oxidative Cl detector is arranged at the outlet end of the vertical reaction furnace. The device disclosed by the invention has the advantages of generating oxidative Cl under the oxygen-enriched atmosphere, realizing switching of different experiment working conditions in the same experimental device and providing convenience for performing a contrast experiment.
Description
Technical field
The present invention relates under oxygen-enriched atmosphere flue gas composition to oxidisability cl formed impact analysis technical field and in particular to
In flue gas under a kind of oxygen-enriched combusting atmosphere, oxidisability cl forms device.
Background technology
Oxygen-enriched (o2/co2) burning be a kind of new coal clean combustion technology, be control co2Greenhouse gas emission have efficacious prescriptions
Formula, compared with regular air fire coal, no matter in combustion process, or is respectively provided with notable difference on combustion product.Oxygen-enriched combusting is adopted
Use relatively pure o2(about 95%-98%) is only during air burning as combustion oxidant, the flue gas volume that coal combustion is formed
25% about;Flue gas is generated by part circulating combustion and controls entrance boiler o2Content;Tail flue gas product is mainly co2(account for
70%) and h2O, and then can easily realize co2Separation and collection.
Under oxygen-enriched combusting atmosphere, hcl can be converted into oxidisability cl in certain condition, and oxidisability cl can aoxidize hg0For hg2 +, reach the purpose of coal burning fume mercury-removing.According to currently domestic and international o2/co2Coal-fired hg Study on Emission present situation, currently both at home and abroad in solution
Certainly o2/co2High h under combustion atmosphere2The suppression rule that o content is formed to oxidisability cl and anti-inhibiting mechanism and o2/co2Coal-fired flue-gas
The research that the aspect such as hg form and influence factor is carried out is extensive not enough.Oxygen-enriched (o2/co2) in flue gas under combustion atmosphere
Oxidisability cl can aoxidize the hg that conventional method is difficult to absorb0For hg2+, hg2+Acidic salt solution or industrial wastewater etc. can be passed through
Removing.At present, both at home and abroad directly absorbed hg is difficult to the main thought exactly handle administering air mercury pollution0Made by oxidation
With being converted into hg2+, then removed, oxygen-enriched (o2/co2) generate oxidisability cl in flue gas under combustion atmosphere device simple to operate
Feasible, the optimum condition of oxidisability cl reaction of formation can be determined by changing related operating mode.
Content of the invention
The present invention is directed to the above-mentioned deficiency of prior art, provides one kind can be in oxygen-enriched (o2/co2) generate oxidisability under atmosphere
Cl, realizes the switching of different experiments operating mode on same experimental provision, conveniently carries out contrast experiment, beneficial to the reason becoming apparent from
In flue gas under solution oxygen-enriched combusting atmosphere, oxidisability cl forms device.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is: in flue gas under a kind of oxygen-enriched combusting atmosphere
Oxidisability cl forms device, and this device includes:
Gas mixing device, described gas mixing device includes the multiple mass flow controllers being connected with source of the gas, and fluid bed is fed
Device and gas electric preheating pipe;The entrance point of each described mass flow controller is connected with a kind of source of the gas;Each described matter
The port of export of amount flow controller is all connected with fluid bed dispenser entrance point by control valve with after same pipeline communication, simultaneously
The entrance point of fluid bed dispenser is connected with gas electric preheating pipe;
Burner, described burner includes vertical response stove, the described entrance point of vertical response stove and fluidisation
The port of export connection of bed dispenser;It is provided with Programmable Logic Controller on described vertical response stove;
Detection means, described detection means includes temperature detector, oxidisability cl detector, described vertical response stove
The junction of entrance point, the port of export and gas electric preheating pipe and fluid bed dispenser be respectively provided with a temperature detector
(divide on the junction of gas electric preheating pipe and fluid bed dispenser, the entrance point of vertical response stove and three positions of the port of export
She Zhi a temperature detector);Described oxidisability cl detector is placed in vertical response outlet of still end.
Comprise the gas mixing device of the part composition such as source of the gas, mass flow controller, fluid bed dispenser and gas electric preheating;
Major function: adjust and control the composition of combustion atmosphere and homogeneous simulated atmosphere, and the gas temperature entering vertical response stokehold
Degree controls.
It is mainly the burner of vertical response stove, major function: provide the place that oxygen-enriched combusting occurs, by adjusting electricity
Heating tube temperature is controlling and to change fire box temperature during oxygen-enriched combusting;The field of experimental temperature Imitating flue gas hybrid reaction is provided
Institute;
Detection means: be mainly made up of temperature monitoring, oxidisability cl detector two parts.Major function: vertical response
Corresponding t at the entrance of stove, exit and point preheating mouth1, t2, t3The detection temperature monitor of three temperature, for supervising respectively
Temperature at three after survey combustion inlet, Combustion outlet and mixed gas electric preheating, can obtain the related data of flue-gas temperature, from
And temperature control regulation can be carried out in time;
Oxidisability cl monitoring point is that oxidisability cl detector is located at Combustion outlet, carries out cl2The sampling of/cl form divides
Analysis.
Preferably, described cl2/ cl Morphology observation device is that two 10ml connect equipped with the Drexel bottle of methyl orange absorbing liquid
Form;This structure can be simple and quick the cl detecting in flue gas2/ cl, is avoided that cl in flue gas2/ cl excess or absorbing liquid are not
The inaccurate problem of detection causing enough.The described oxidisability cl detector of invention is arranged on thief hatch, can by this structure
Can quickly be judged to sampling required time according to color reaction.This device adopts two methyl oranges equipped with 10ml
The Drexel bottle of absorbing liquid is in series, this avoid because in flue tail gas, oxidisability cl concentration is excessive and methyl orange absorbing liquid not
The problem of foot.
Preferably, being connected with the other end of gas electric preheating pipe that is connected of the described entrance point with fluid bed dispenser
Water injection pump;The utilization rate of experimental provision not only be increased using the setting of this structure but also enriched experiment condition, experimental provision had increased
H can be studied after having added syringe pump2O is in oxygen-enriched (o2/co2) the suppression rule that oxidisability cl in gas formed under combustion atmosphere,
To h in flue gas under oxygen-enriched combusting atmosphere2O acts on to hg0 inhibition of oxidation and proposes experimentation.
Preferably, the fluid bed dispenser of the present invention includes the admission line being sequentially communicated, hybrid chamber and outlet pipe;
The internal diameter of described admission line, hybrid chamber and outlet pipe is than for 1:2-3:1;If arranging on the side wall of described admission line
Dry air intake branch, the side wall of described outlet pipe arranges some going out gas branch pipes;Using said structure it is ensured that multiple other
Enter from admission line and air intake branch simultaneously, and the internal diameter of hybrid chamber is bigger than air inlet pipe, is to ensure that energy after other entrance
Sufficiently mix homogeneously, convenient more true, the actual flue gas admixture of reliable simulation, thus ensure that this device detects
Accuracy.
Preferably, being additionally provided with one on the linkage section put with oxidisability cl detector of described vertical response outlet of still end
Gas electric preheating pipe;Gas temperature out can rationally be controlled from reacting furnace using this structure, facilitate controlling stream to go out gas temperature
Degree.
Preferably, the gas outlet of described oxidisability cl detector is communicated with air pump, the outlet of described air pump
Connection device for absorbing tail gas (equipped with alkali solid or liquid, such as sodium hydroxide, potassium or its aqueous solution);Setting air pump can be square
Just control gas flow, and device for absorbing tail gas can absorb harmful sour gas in tail gas, more conducively safe and environment-friendly.
The workflow of said apparatus of the present invention is as follows: needs before experiment to detect the air-tightness of whole device, typically with two
Carbonoxide or nitrogen carry out air-leakage test, and after determining that air-tightness is good, empirically operating mode passes through mass flow controller
It is passed through each component gas, after steady air current, vertical response stove, opening temperature detector are opened by Programmable Logic Controller.Wait
Reacting furnace reach gathered data temperature required when, connect oxidisability cl detector, open air pump be evacuated.Ordinary circumstance
Under, stop pumping if the absorbing liquid redness in oxidisability cl detector means has obvious colour fading, fade without obvious
Then it is evacuated 20min.Absorbing liquid is carried out on request the measurement of oxidisability cl according to GB hj/t30-1999.
Advantages of the present invention and beneficial effect:
1. the present invention is on the premise of oxygen-enriched atmosphere, makes hcl be converted into oxidisability cl in the environment of high temperature.Based on this
Kind envision built experimental provision more simple and feasible than the method for commercial power solution saturated aqueous common salt preparing chlorine gas, simultaneously energy again
Enough continual and steady generation oxidisability cl.
2. the final purpose of the present invention is the oxidation effectiveness in order to study oxidisability cl to hg0 in flue gas.From the present invention's
For device, it is not only able to simulative power plant flue gas environment, and gas component and reaction temperature are all to carry out as needed
Adjust, so research operating mode becomes rich and varied, to the oxidation effect to hg0 in power-plant flue gas for oxidisability cl in research flue gas
Fruit has directive significance.
3. the present invention is studying oxygen-enriched (o2/co2) oxidisability cl increases on the basis of forming device in flue gas under combustion atmosphere
Water injection pump is water feed apparatus, so not only increased the utilization rate of experimental provision but also enriches experiment condition.Experimental provision increases
H can be studied after having added syringe pump2O is in oxygen-enriched (o2/co2) the suppression rule that oxidisability cl in gas formed under combustion atmosphere,
To h in flue gas under oxygen-enriched combusting atmosphere2O acts on to hg0 inhibition of oxidation and proposes experimentation.
Brief description
Oxygen-enriched (the o of Fig. 1 present invention2/co2) oxidisability cl forms schematic device in flue gas under combustion atmosphere.
The main view figure structure schematic representation of Fig. 2 fluid bed of the present invention dispenser.
The a-a section view figure structure schematic representation of Fig. 3 fluid bed of the present invention dispenser.
As shown in the figure: 1. temperature detector, 2. Programmable Logic Controller, 3. mass flow controller, 4. fluid bed dispenser,
4.1 air inlet pipe, 4.11. air intake branch, 4.2 hybrid chambers, 4.3. escape pipe, 4.31. going out gas branch pipe, 5. vertical response stove, 6. gas
Body electric preheating pipe, 7. device for absorbing tail gas, 8. oxidisability cl detector, 8.1. Drexel bottle, 9. water injection pump, 10. air pump,
11. control valves.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail, but the present invention is not limited solely to following enforcement
Example.
As illustrated in the accompanying drawings from 1 to 3: the oxygen-enriched (o of the present invention2/co2) oxidisability cl forms device in flue gas under combustion atmosphere, should
Device includes:
Gas mixing device, described gas mixing device is included with source of the gas (if Fig. 1 is the actual flue gas of the simulative power plants such as co2, o2, hcl
The source of the gas of environment) connect mass flow controller 3 (commercially available prod, model: d07 series mass flow controller, coordinate d08-
3f type Flow Measurement Display Meter use), fluid bed dispenser 4 (enters the mixing before reactor for gas, provides simulation to reactor
Flue gas, can also be heated when necessary) and gas electric preheating pipe 6;
The entrance point of each described mass flow controller 3 is connected with a kind of source of the gas;Each described mass flow control
The port of export of device 3 processed is all connected with fluid bed dispenser 4 entrance point by control valve 11 with after same pipeline communication, fluidizes simultaneously
Bed dispenser 4 entrance point and gas electric preheating pipe 6 (add electric preheating pipe to have two purposes: 1, simulated flue gas enter reactor
Need certain temperature, the air preheater of such as power plant also has same effect;2, in research h2O is water vapour to oxidisability
Need water vapour in simulated flue gas when cl generates the impact producing, in experiment, a small amount of water is added by syringe pump, pre- in conjunction with electricity
Hot device heating generates water vapour) it is connected;
Burner, described burner includes vertical response stove 5, the described entrance point of vertical response stove 5 and stream
Change the port of export connection of bed dispenser 4;Programmable Logic Controller 2 is provided with described vertical response stove 5 (as ltde programmable control
Device processed);
Detection means, described detection means includes temperature detector 1 (as xmtd digital display adjusting apparatus), the detection of oxidisability cl
Device 8, the described entrance point of vertical response stove 5, the port of export, gas electric preheating pipe 6 is equal with fluid bed dispenser 4 place of being connected with each other
It is respectively arranged with a temperature detector 1;Described oxidisability cl detector 8 is placed in vertical response stove 5 port of export.
Comprise the gas mixing device of the part composition such as source of the gas, mass flow controller, fluid bed dispenser and gas electric preheating;
Major function: adjust and control the composition of combustion atmosphere and homogeneous simulated atmosphere, and the gas temperature entering vertical response stokehold
Degree controls.
It is mainly the burner of vertical response stove, major function: provide the place that oxygen-enriched combusting occurs, by adjusting electricity
Heating tube temperature is controlling and to change fire box temperature during oxygen-enriched combusting;The field of experimental temperature Imitating flue gas hybrid reaction is provided
Institute;
Detection means: be mainly made up of temperature monitoring, oxidisability cl detector two parts.Major function: vertical vertical anti-
Answer entrance point, the port of export of stove 5, gas electric preheating pipe 6 is connected with each other corresponding t at end with fluid bed dispenser 41, t2, t3Three
The detection temperature monitor of individual temperature, for monitoring respectively at three after combustion inlet, Combustion outlet and mixed gas electric preheating
Temperature, the related data of flue-gas temperature can be obtained, so as to carry out temperature control regulation in time;
Oxidisability cl monitoring point is that oxidisability cl detector is located at Combustion outlet, carries out cl2The sampling of/cl form divides
Analysis.
Oxidisability cl detector of the present invention is cl2/ cl Morphology observation device is that two 10ml absorb equipped with methyl orange
The Drexel bottle 8.1 of liquid is formed by placed in series;Can be according to needed for color reaction can be quickly to sampling by this structure
Time judges.This device is in series using two Drexel bottles equipped with the methyl orange absorbing liquid of 10ml, this avoid
The problem that methyl orange absorbing liquid is not enough because oxidisability cl concentration is excessive in flue tail gas.
The other end of the gas electric preheating pipe 6 that the entrance point with fluid bed dispenser 4 of the present invention is connected is connected with water
Syringe pump 9 (as model: kl-602 syringe pump);The utilization rate of experimental provision not only increased but also abundant using the setting of this structure
Experiment condition, experimental provision can study h after increased syringe pump2O is in oxygen-enriched (o2/co2) under combustion atmosphere to oxygen in gas
The suppression rule that the property changed cl is formed, to h in flue gas under oxygen-enriched combusting atmosphere2O acts on proposition experiment and grinds to hg0 inhibition of oxidation
Study carefully.
The fluid bed dispenser 4 of the present invention includes the admission line 4.1 being sequentially communicated, hybrid chamber 4.2 and outlet pipe
4.3;The internal diameter of described admission line, hybrid chamber and outlet pipe is than for 1:2-3:1;Set on the side wall of described admission line
Put some air intake branches 4.11, the side wall of described outlet pipe arranges some going out gas branch pipes 4.31;Using said structure, permissible
Ensure that multiple other enter from admission line and air intake branch simultaneously, and the internal diameter of hybrid chamber is bigger than air inlet pipe, is to ensure that
Energy sufficiently mix homogeneously after other entrance, convenient more true, the actual flue gas admixture of reliable simulation, thus protect
Demonstrate,prove the accuracy of this device detection.
Gas electricity is additionally provided with the connection end that vertical response outlet of still end of the present invention is put with oxidisability cl detector
Economizer bank;Gas temperature out can rationally be controlled from reacting furnace using this structure, facilitate controlling stream to go out gas temperature.
The gas outlet of oxidisability cl detector 8 of the present invention is communicated with air pump 10, the going out of described air pump 10
Mouth connection device for absorbing tail gas 7 (equipped with the bottle of alkali solid or liquid, such as sodium hydroxide, potassium or its aqueous solution);Setting is taken out
Air pump can easily control gas flow.According to " in Concentration in Fixed Pollutants Source after methyl orange absorbing liquid collection oxidisability cl
The mensure methyl orange spectrophotography of chlorine " (hj/t30-1999), entered by model hach-dr5000 spectrophotometer
The measurement of row fading extent, and then draw oxidisability cl levels.
Between every kind of source of the gas of the present invention and mass flow controller, also shell arranges control valve 11, the various sources of the gas of convenient control
Flow.
Embodiment, using assembly of the invention, the air-tightness of experiment detection whole device, typically with carbon dioxide or nitrogen
Gas carries out air-leakage test, and after determining that air-tightness is good, empirically operating mode is passed through each component gas, mould by mass flowmenter
The total flow intending flue gas is 2l/min, wherein o26%, the hcl concentration accounting for total gas flow is changed from 15ppm~120ppm,
co2For balanced gas, reaction temperature is changed from 500 DEG C~1200 DEG C.Opened by Programmable Logic Controller after steady air current
Open vertical response stove, opening temperature detector.Wait reacting furnace reach gathered data temperature required when, connect oxidisability cl detection
Device, opens air pump and is evacuated.Generally, substantially take off if the absorbing liquid redness in oxidisability cl detector means has
Color just stops being evacuated, and is then evacuated 20min without obvious colour fading.Absorbing liquid is entered according to GB hj/t30-1999 on request
The measurement of row oxidisability cl.By the analysis to experimental data, tentatively draw when temperature and hcl concentration are all operating mode maximum
The growing amount of oxidisability cl is maximum, and oxidisability cl maximum conversion rate can reach 18% about.Can this by above-described embodiment
Bright device can effectively simulate actual production operating mode, and the productivity ratio of oxidisability cl is high.
Claims (6)
1. in flue gas under a kind of oxygen-enriched combusting atmosphere oxidisability cl formed device it is characterised in that: this device includes:
Gas mixing device, described gas mixing device includes the multiple mass flow controllers (3) being connected with source of the gas, fluid bed dispenser
And gas electric preheating pipe (6) (4);The entrance point of described each mass flow controller (3) is connected with a kind of source of the gas;Described
The port of export of each mass flow controller (3) all passes through control valve (11) and fluid bed dispenser with after same pipeline communication
(4) entrance point connection, the entrance point of fluid bed dispenser (4) is connected with gas electric preheating pipe (6) simultaneously;
Burner, described burner includes vertical response stove (5), the described entrance point of vertical response stove (5) and stream
Change the port of export connection of bed dispenser (4);It is provided with Programmable Logic Controller (2) on described vertical response stove (5);
Detection means, described detection means includes temperature detector (1), oxidisability cl detector (8), described vertical response
The entrance point of stove (5), the port of export and gas electric preheating pipe (6) are respectively provided with one with the junction of fluid bed dispenser (4)
Individual temperature detector;Described oxidisability cl detector (8) is placed in vertical response stove (5) port of export.
2. in flue gas under oxygen-enriched combusting atmosphere according to claim 1 oxidisability cl formed device it is characterised in that: described
Oxidisability cl detector (8) be to be formed by placed in series equipped with the Drexel bottle (8.1) of methyl orange absorbing liquid by two 10ml.
3. in flue gas under oxygen-enriched combusting atmosphere according to claim 1 oxidisability cl formed device it is characterised in that: described
The other end of gas electric preheating pipe (6) being connected with the entrance point of fluid bed dispenser (4) is connected with water injection pump (9).
4. in flue gas under oxygen-enriched combusting atmosphere according to claim 1 oxidisability cl formed device it is characterised in that: described
Fluid bed dispenser (4) the inclusion admission line (4.1), hybrid chamber (4.2) and the outlet pipe (4.3) that are sequentially communicated;Described
Admission line, hybrid chamber and outlet pipe internal diameter than for 1:2-3:1;Arrange on the described side wall of admission line (4.1)
Some air intake branches (4.11), the side wall of described outlet pipe (4.3) arranges some going out gas branch pipes (4.31).
5. in flue gas under oxygen-enriched combusting atmosphere according to claim 1 oxidisability cl formed device it is characterised in that: described
Vertical response stove (5) port of export and oxidisability cl detector put gas electric preheating pipe (6) be additionally provided with the linkage section of (8).
6. in flue gas under oxygen-enriched combusting atmosphere according to claim 1 oxidisability cl formed device it is characterised in that: described
The gas outlet of oxidisability cl detector (8) be communicated with air pump (10), the outlet tail gas of described air pump (10) is inhaled
Receiving apparatus (7).
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CN111841453B (en) * | 2020-06-18 | 2022-08-23 | 西北大学 | Be applied to thermogravimetric analysis's miniature fluidized bed reaction unit |
CN112816361B (en) * | 2021-01-05 | 2023-03-14 | 神华神东煤炭集团有限责任公司 | System and method for evaluating thermal conversion of organic matter-containing solid |
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US6855859B2 (en) * | 1999-03-31 | 2005-02-15 | The Babcock & Wilcox Company | Method for controlling elemental mercury emissions |
CN102226533B (en) * | 2011-05-26 | 2012-10-10 | 中国人民解放军国防科学技术大学 | High-speed premixed flame furnace for supersonic burning research |
WO2013019393A1 (en) * | 2011-07-29 | 2013-02-07 | Flsmidth A/S | Pollution control system for kiln exhaust |
EP3184613B1 (en) * | 2011-11-04 | 2020-07-08 | Biomass Secure Power Inc. | Process for biomass torrefaction |
CN102563687B (en) * | 2012-03-07 | 2014-05-14 | 上海锅炉厂有限公司 | Oxygen-enriched combustion system |
US9045696B2 (en) * | 2012-04-18 | 2015-06-02 | Peter Rugg | System and method for purifying solid carboniferous fuels, using a rotary chamber, prior to chemical looping combustion |
CN103968373A (en) * | 2014-04-25 | 2014-08-06 | 华中科技大学 | Pulverized coal oxygen-rich combustion method and system |
CN104121581B (en) * | 2014-07-23 | 2016-06-29 | 华东理工大学 | A kind of high efficency low NOx tubular heater low concentration oxygen-enriched combustion system and burner |
CN204203145U (en) * | 2014-12-05 | 2015-03-11 | 浙江大学宁波理工学院 | Oxidisability Cl forming apparatus in flue gas under oxygen-enriched combusting atmosphere |
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