CN102419292A - System for determining SO3 in flue gas - Google Patents

System for determining SO3 in flue gas Download PDF

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Publication number
CN102419292A
CN102419292A CN2011102280855A CN201110228085A CN102419292A CN 102419292 A CN102419292 A CN 102419292A CN 2011102280855 A CN2011102280855 A CN 2011102280855A CN 201110228085 A CN201110228085 A CN 201110228085A CN 102419292 A CN102419292 A CN 102419292A
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China
Prior art keywords
flue gas
mensuration system
absorber
gas
water solution
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Pending
Application number
CN2011102280855A
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Chinese (zh)
Inventor
王建山
黎建明
邱正秋
张金阳
彭良虎
邹维嘉
罗强
罗义文
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Pangang Group Research Institute Co Ltd
Pangang Group Panzhihua Steel and Vanadium Co Ltd
Pangang Group Co Ltd
Original Assignee
Pangang Group Research Institute Co Ltd
Pangang Group Panzhihua Steel and Vanadium Co Ltd
Pangang Group Co Ltd
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Application filed by Pangang Group Research Institute Co Ltd, Pangang Group Panzhihua Steel and Vanadium Co Ltd, Pangang Group Co Ltd filed Critical Pangang Group Research Institute Co Ltd
Priority to CN2011102280855A priority Critical patent/CN102419292A/en
Publication of CN102419292A publication Critical patent/CN102419292A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a system for determining SO3 in flue gas, comprises the following parts: a sampler which has the function of heating the flue gas that passes through the sampler; an absorber with an aqueous solution of isopropanol, wherein, the inlet of the absorber is connected with the outlet of the sampler to let the flue gas pass through the aqueous solution of isopropanol; a gas flowmeter, wherein, the inlet of the gas flowmeter is connected with the outlet of the absorber; and a vavuum pump which is connected with the outlet of the gas flowmeter.

Description

SO in the flue gas 3The mensuration system
Technical field
The present invention relates to a kind of mensuration system of gas, specifically, the present invention relates to SO in a kind of flue gas 3The mensuration system.
Background technology
Steel and iron industry is to cause one of more serious industry of atmospheric pollution, and sintering circuit is the primary pollution source of steel and iron industry.In the last few years, increasing sintering plant had been installed flue gas desulphurization system and had been reduced discharging SO 2, wherein the part of smoke desulphurization system adopts wet desulfurizing process.
Though SO in the sinter fume 3Discharge capacity less relatively, generally only account for 1%～2% of total sulfur oxide emission in the flue gas, but SO in the sinter fume 3The existence meeting operating parameter of wet process of FGD and service condition are produced bigger influence, particularly the sulfur removal technology that adopts the organic amine absorption cycle is produced bigger influence.This is because the organic amine desulfuration solution can be owing to absorb SO in the flue gas 3And make its SO 4 2-Concentration raise SO 4 2-The rising of concentration can influence the desulphurizing ability of organic amine solution.In addition, SO in the sinter fume 3The existence meeting high efficiency of sweetener, longevityization operation are produced bigger influence.SO 3Chemical property vivaciously and very easily combines to generate acid mist by flue wall absorption or with water vapor in the sinter fume, cause acid dew point (adiabatic condensation temperature of sulfuric acid vapor is called the acid mist point in the flue gas) to corrode.SO in the sinter fume 3Content is many more, and the corrosion scope is more extensively serious more.
Therefore, be necessary to understand in time and exactly SO in the flue gas 3Content.So far, owing to excessive SO in the process of collecting 2Very easily be oxidized to the SO of high concentration 3And the accuracy of measurement and degree of accuracy are reduced, so for SO in the complicated flue gas 3Measurement be difficult problem always.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, can avoid SO in the flue gas and provide a kind of 2To SO 3The SO that mensuration exerts an influence 3The mensuration system.
According to SO in the flue gas of the present invention 3The mensuration system comprises: ST has the function of heating through the flue gas of ST; Absorber is equipped with isopropanol water solution in it, the inlet of absorber is connected so that flue gas passes through isopropanol water solution with the outlet of ST; Gas meter, its inlet is connected with the outlet of absorber; Vacuum pump is connected with the gas meter outlet.
According to SO in the flue gas of the present invention 3The mensuration system can also comprise the particulate filter that is arranged between ST and the absorber.
According to SO in the flue gas of the present invention 3The mensuration system can also comprise the detecting device that is arranged between absorber and the gas meter, pH is housed in the said detecting device is less than or equal to 1 BaCl 2The WS.
According to SO in the flue gas of the present invention 3The mensuration system can also comprise the exsiccator that is arranged between absorber and the gas meter.
According to SO in the flue gas of the present invention 3The mensuration system, exsiccator can be arranged between detecting device and the gas meter.
According to SO in the flue gas of the present invention 3The mensuration system, the concentration of isopropanol water solution can be 70wt%-85wt%.The quantity of absorber can be at least one.
According to SO in the flue gas of the present invention 3The mensuration system can also be included as the D.C. regulated power supply that vacuum pump provides electric energy.
According to SO in the flue gas of the present invention 3The mensuration system, gas meter can be wet test meter.
According to SO in the flue gas of the present invention 3The mensuration system, gas meter can comprise thermometer and pressure gauge.
According to SO in the flue gas of the present invention 3The mensuration system adopts isopropanol water solution as SO 3Therefore absorbing agent can avoid SO 2To the influence of measuring, thereby the system of assembling according to the present invention can reach the purpose of accurate mensuration.
Description of drawings
The following description of the exemplary embodiment of carrying out in conjunction with the drawings, these and/or other aspect of the present invention and advantage will become clear and be easier to and understand, wherein:
Fig. 1 is SO in the flue gas according to an exemplary embodiment of the present invention 3The synoptic diagram of mensuration system.
Embodiment
To describe the present invention in detail with reference to specific embodiment of the present invention below.
According to SO in the flue gas of the present invention 3The mensuration system comprises ST, absorber, gas meter and vacuum pump.
ST has heating function and heats with the sinter fume to sampling, prevents the condensate moisture in the sinter fume and absorbs the SO in the sinter fume 3Thereby, guarantee SO in the sinter fume 3Accuracy and the reliability measured.Isopropanol water solution that concentration is 70%-85% is housed in the absorber and is connected with the outlet of ST, in practical operation, sinter fume feeds in the isopropanol water solution that is contained in the absorber and the isopropanol water solution from absorber and bloats.In order to prevent SO 3Gas is not absorbed in isopropanol water solution fully, and two or more absorbers can be set.Gas meter is connected the volume that is used to measure flue gas with the outlet of absorber.Vacuum pump is connected with the outlet of gas meter thinks that gas to be measured provides power through mensuration of the present invention system.
According to SO in the flue gas of the present invention 3The mensuration system adopts isopropanol water solution as SO 3Absorption liquid, isopropanol water solution can absorb SO effectively 3, stop SO 2Be oxidized to SO 3, and SO 2Solubleness is very low in isopropanol water solution.Therefore, adopt isopropanol water solution as SO 3Absorbing agent can reduce SO effectively 2Oxidation is to SO 3Measure result's influence.In addition, the concentration of isopropanol water solution of the present invention is 70%-85%, and the isopropanol water solution in this concentration range can absorb the SO in the flue gas effectively 3And with SO in the flue gas that absorbs 2Amount reduce to minimumly, therefore reduced because of SO in the absorption process 2Be oxidized to SO 3And the error that causes.
Preferably, according to SO in the flue gas of the present invention 3The mensuration system can also comprise particulate filter, detecting device and exsiccator.Particulate filter is connected with the outlet of ST and the import of absorber, and particulate filter can filter out the dust in the sinter fume effectively, and metal simple-substance that has prevented like this to contain in the dust and oxide thereof are with the SO in the absorption liquid 2Be oxidized to SO 3Thereby, reduced measuring error.Detecting device is connected with the outlet of absorber and the import of gas meter, pH is housed in the detecting device is less than or equal to 1 BaCl 2The WS is to be used for detecting the SO of sinter fume 3Whether be absorbed that isopropanol water solution absorbs fully in the device.In operating process, if BaCl 2White opacity appears in the WS, then proves SO 3In isopropanol water solution, do not absorbed fully, and need to increase the amount of isopropanol water solution and/or reduce sinter fume through SO in the flue gas of the present invention 3The flow velocity of mensuration system is so that SO 3Absorption fully; If BaCl 2White opacity does not appear in the WS, then proves SO 3In isopropanol water solution, absorbed fully.Exsiccator is connected with the outlet of absorber and the import of gas meter, if according to SO in the flue gas of the present invention 3The mensuration system comprises detecting device, and then the import of exsiccator is connected with the outlet of detecting device.Exsiccator is used for removing the moisture that sinter fume carries, thereby reduces the corrosion of flue gas to instrument.
Fig. 1 is SO in the flue gas according to an exemplary embodiment of the present invention 3The synoptic diagram of mensuration system.
To describe according to an exemplary embodiment of the present invention SO in the flue gas in detail with reference to Fig. 1 below 3The mensuration system.With reference to Fig. 1, SO in the flue gas according to an exemplary embodiment of the present invention 3The mensuration system comprises ST 1, particulate filter 2, first absorber 3, second absorber 4, detecting device 5, exsiccator 6, gas meter 7, vacuum pump 10 and D.C. regulated power supply 11.Yet, the invention is not restricted to this, as stated, according to SO in the flue gas of the present invention 3The mensuration system can only comprise ST 1, first absorber 3, gas meter 7, the vacuum pump 10 that can move.
SO in flue gas according to an exemplary embodiment of the present invention 3In the mensuration system; ST 1 is double-deck heated at constant temperature stopple coupon; Its internal layer twines through the heater strip of series connection; It is outer with the winding of braiding scuff-resistant coating, and this heated at constant temperature stopple coupon can be kept 100 ℃-150 ℃ temperature when energising, therefore can prevent the moisture condensation in ST 1 in the sinter fume effectively.
The outlet of ST 1 is connected with the inlet of particulate filter 2.SO in flue gas according to the present invention 3In the mensuration system, particulate filter 2 is the glass fiber granules filtrator, but is not limited thereto.
The outlet of particulate filter 2 is connected with the import of first absorber 3, and first absorber 3 is connected with second absorber 4.SO in flue gas according to an exemplary embodiment of the present invention 3In the mensuration system, first absorber 3 is identical with the structure of second absorber 4, but is not limited thereto, and that is to say, the structure of first absorber 3 and second absorber 4 can be different.In addition, the quantity of absorber is not limited to two shown in Fig. 1.As shown in fig. 1, SO in flue gas according to an exemplary embodiment of the present invention 3In the mensuration system, first absorber 3 and second absorber 4 are by absorption bottle, glass tube and be inverted in the funnel composition in the isopropanol water solution.Sinter fume gets into the isopropanol water solution from inverted funnel like this, from isopropanol water solution, bloats then, gets into follow-up instrument through glass tube (outlet) at last.Inverted funnel helps SO 3Absorption in isopropanol water solution.
The outlet of second absorber 4 is connected with the import of detecting device 5.As shown in fig. 1, the structure of detecting device 5 is identical with the structure of first absorber 3 and second absorber 4.PH is housed in the detecting device 5 is less than or equal to 1 BaCl 2The WS is to be used for detecting the SO of sinter fume 3Whether absorbed fully by the isopropanol water solution in first absorber 3 and second absorber 4.In operating process, if BaCl 2White opacity appears in the WS, then proves SO 3In isopropanol water solution, absorbed fully, and needed to increase the amount of isopropanol water solution, the quantity that increases absorber and/or reduction sinter fume through SO in the flue gas of the present invention 3The flow velocity of mensuration system is so that SO 3Absorption fully; If BaCl 2White opacity does not appear in the WS, then proves SO 3In isopropanol water solution, absorbed fully.
The import of exsiccator 6 is connected with the outlet of detecting device 5.SO in flue gas according to an exemplary embodiment of the present invention 3In the mensuration system, exsiccator 6 is the exsiccator of filling gel, but the invention is not restricted to this.
The import of gas meter 7 is connected with the outlet of exsiccator 6.SO in flue gas according to an exemplary embodiment of the present invention 3In the mensuration system, gas meter 7 is a wet test meter, but the invention is not restricted to, and gas meter 7 can be the gas meter such as spinner-type flowmeter, suspended body flowmeter etc.As shown in fig. 1, when gas meter 7 was wet test meter, gas meter 7 comprised the thermometer 8 and the pressure gauge 9 that is used for gaging pressure that is used to measure temperature.But the invention is not restricted to this, when gas meter 7 when not comprising thermometer and manometric spinner-type flowmeter or suspended body flowmeter, can be in flue gas according to the present invention SO 3Add thermometer and pressure gauge in the mensuration system.
Vacuum pump 10 is connected with the outlet of gas meter 7, and vacuum pump 10 is SO in the flue gas according to an exemplary embodiment of the present invention 3The mensuration system provides vacuum power with the sinter fume intake system.SO in flue gas according to an exemplary embodiment of the present invention 3In the mensuration system, vacuum pump 10 is the miniature diaphragm pump, but the invention is not restricted to this, and for example, vacuum pump 10 can be sliding vane rotary vacuum pump or Roots vaccum pump etc.
In addition, the D.C. regulated power supply 11 shown in Fig. 1 is used for to vacuum pump 10 electric energy being provided, and can control according to SO in the flue gas of exemplary embodiment through the electric current of control D.C. regulated power supply 11 3The size of the flow of the flue gas of mensuration system.
To describe in detail according to SO in the flue gas of invention exemplary embodiment with reference to Fig. 1 below 3The exemplary embodiment of the operation of mensuration system.
Connect each assembly according to order shown in Figure 1 with silicone tube, the impermeability of inspection mensuration system is air tight to guarantee system.
In first absorber 3 and second absorber 4, add 80% the isopropanol water solution of the about 500mL of total amount, and the pH that in detecting device 5, packs into is less than 1 BaCl 2The WS.The size of the power of adjusting D.C. regulated power supply maintains 2L/min～4L/min with the flow velocity of wet test meter 7, and writes down the initial reading V when sampling beginning 1When sampling 100L～200L flue gas, close vacuum pump 10, stop sampling, record wet test meter 7 stops reading V 2, temperature reading t and pressure gauge reading P mAbsorption liquid in two absorbers 3 and 4 is all poured in the volumetric flask; Pipeline that connects with distilled water flushing and absorber 3 and 4 and all pour into washing lotion in the volumetric flask; Adding distil water shakes up to 1000mL; Filter the 1000mL absorption liquid removing low amounts of dust and the suspension that contains in the absorption liquid with 0.45 μ m filter membrane core filtration unit, thus make when analyzing content more accurate.
Get the XmL absorption liquid, with the content of sulfate radical in the barium sulphate gravimetric method analysis absorption liquid, the quality of the barium sulphate that from the XmL absorption liquid, is precipitated out is Ymg.
SO in the flue gas 3The calculating of content is calculated as follows:
C = [ 1000000 * 80 * Y 233 * Y ] / [ ( V 2 - V 1 ) * 273.15 273.15 + t * P a + P m - P v 101.325 ]
Wherein, C (mg/Nm 3) be SO 3Content;
X (mL) is the volume of the absorption liquid of in the 1000mL absorption liquid, taking;
Y (mg) is the quality of the barium sulphate that employing barium sulphate gravimetric method is precipitated out from the XmL absorption liquid;
V 1Reading when (L) beginning for wet flow indicator;
V 2Reading when (L) stopping for wet flow indicator;
T (℃) be the wet gas meter temperature;
P a(kPa) be atmospheric pressure;
P m(kPa) be wet gas meter pressure;
P yWater saturation vapour pressure when (kPa) being temperature t.
SO in the flue gas according to an exemplary embodiment of the present invention 3The mensuration system adopts isopropanol water solution as SO 3Therefore absorbing agent can avoid SO 2To the influence of measuring, thereby make the system of assembling reach the purpose of accurate mensuration according to the present invention.

Claims (10)

1. SO in the flue gas 3The mensuration system is characterized in that, said mensuration system comprises:
ST has the function of heating through the flue gas of ST;
Absorber is equipped with isopropanol water solution in it, the inlet of absorber is connected so that flue gas passes through isopropanol water solution with the outlet of ST;
Gas meter, its inlet is connected with the outlet of absorber;
Vacuum pump is connected with the gas meter outlet.
2. SO in the flue gas as claimed in claim 1 3The mensuration system is characterized in that, said mensuration system also comprises the particulate filter that is arranged between ST and the absorber.
3. SO in the flue gas as claimed in claim 1 3The mensuration system is characterized in that, said mensuration system also comprises the detecting device that is arranged between absorber and the gas meter, pH is housed in the said detecting device is less than or equal to 1 BaCl 2The WS.
4. SO in the flue gas as claimed in claim 1 3The mensuration system is characterized in that, said mensuration system also comprises the exsiccator that is arranged between absorber and the gas meter.
5. SO in the flue gas as claimed in claim 3 3The mensuration system is characterized in that, said mensuration system also comprises the exsiccator that is arranged between detecting device and the gas meter.
6. SO in the flue gas as claimed in claim 1 3The mensuration system is characterized in that, the concentration of said isopropanol water solution is 70wt%-85wt%.
7. SO in the flue gas as claimed in claim 1 3The mensuration system is characterized in that, the quantity of absorber is at least one.
8. SO in the flue gas as claimed in claim 1 3The mensuration system is characterized in that, said mensuration system also is included as the D.C. regulated power supply that vacuum pump provides electric energy.
9. SO in the flue gas as claimed in claim 1 3The mensuration system is characterized in that gas flow is counted wet test meter.
10. SO in the flue gas as claimed in claim 1 3The mensuration system is characterized in that, gas meter comprises thermometer and pressure gauge.
CN2011102280855A 2011-08-10 2011-08-10 System for determining SO3 in flue gas Pending CN102419292A (en)

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102708730A (en) * 2012-04-26 2012-10-03 中南大学 Smoke adsorption capability demonstrating device
CN102778518A (en) * 2012-07-17 2012-11-14 东南大学 Method and device for measuring SOx in fire coal fume
CN102879239A (en) * 2012-10-15 2013-01-16 山东电力集团公司电力科学研究院 Flue gas pre-treatment type sampling and analysis device and method for escaping ammonia of denitration system of power plant
CN103471878A (en) * 2012-11-13 2013-12-25 上海理工大学 Sampling and collecting system of SO3 in wet method desulphurization system tail flue gas
CN103616261A (en) * 2013-10-18 2014-03-05 国家电网公司 Apparatus for extracting and collecting conductive ions and insoluble substances in haze
CN104090078A (en) * 2014-07-17 2014-10-08 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 Method and system for determining sulfur dioxide and sulfur trioxide in flue gas
CN104122374A (en) * 2014-08-14 2014-10-29 福建龙净环保股份有限公司 Method and device for checking sulfur trioxide sampling test system
CN104266866A (en) * 2014-09-15 2015-01-07 孚派特环境科技（苏州）有限公司 Portable multistage suction filtration system
CN104390815A (en) * 2013-10-23 2015-03-04 中国科学院地球环境研究所 Automatic gas collection device and method thereof
CN105731394A (en) * 2015-12-31 2016-07-06 安阳市岷山有色金属有限责任公司 Refined sulfuric acid preparation device and preparation method thereof
CN105876590A (en) * 2014-09-10 2016-08-24 中国检验检疫科学研究院 Novel ethyl formate quantitative dosing system
CN106153827A (en) * 2016-08-02 2016-11-23 华电电力科学研究院 Online sulfur trioxide apparatus for measuring concentration based on liquid absorption method and method
CN106596198A (en) * 2016-12-20 2017-04-26 哈尔滨工业大学 Online SO3 measuring system and method
CN106813954A (en) * 2017-01-23 2017-06-09 浙江菲达环保科技股份有限公司 A kind of sampling system suitable for the sampling of low concentration sulfur trioxide
CN107894491A (en) * 2017-10-27 2018-04-10 东南大学 Test the device and method of water soluble ion concentration in wet desulphurization neat stress
CN108303293A (en) * 2018-02-09 2018-07-20 华能国际电力股份有限公司 The sampling of sulfur trioxide and detecting system and method in a kind of fire coal boiler fume
CN109000997A (en) * 2018-10-09 2018-12-14 中国科学院过程工程研究所 A kind of SO3The method of sampling and device of detection device
CN109323895A (en) * 2018-10-23 2019-02-12 攀钢集团攀枝花钢铁研究院有限公司 Fixed on-line sampling system is always measured containing S for coke-stove gas
CN111426646A (en) * 2020-05-25 2020-07-17 中煤科工集团重庆研究院有限公司 Pretreatment method for detecting sulfur trioxide in discharged flue gas
CN111487094A (en) * 2020-05-25 2020-08-04 中煤科工集团重庆研究院有限公司 SO in the exhaust gas3Detection preprocessing system and using method thereof
CN113230875A (en) * 2021-03-04 2021-08-10 昆明理工大学 Bayer process red mud dry method for removing SO in copper smelting high-temperature flue gas3Method and apparatus

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CN102708730A (en) * 2012-04-26 2012-10-03 中南大学 Smoke adsorption capability demonstrating device
CN102778518A (en) * 2012-07-17 2012-11-14 东南大学 Method and device for measuring SOx in fire coal fume
CN102879239A (en) * 2012-10-15 2013-01-16 山东电力集团公司电力科学研究院 Flue gas pre-treatment type sampling and analysis device and method for escaping ammonia of denitration system of power plant
CN103471878A (en) * 2012-11-13 2013-12-25 上海理工大学 Sampling and collecting system of SO3 in wet method desulphurization system tail flue gas
CN103616261A (en) * 2013-10-18 2014-03-05 国家电网公司 Apparatus for extracting and collecting conductive ions and insoluble substances in haze
CN103616261B (en) * 2013-10-18 2015-10-28 国家电网公司 In a kind of haze, conductive ion and insolubles particle extract harvester
CN104390815A (en) * 2013-10-23 2015-03-04 中国科学院地球环境研究所 Automatic gas collection device and method thereof
CN104090078A (en) * 2014-07-17 2014-10-08 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 Method and system for determining sulfur dioxide and sulfur trioxide in flue gas
CN104122374B (en) * 2014-08-14 2016-06-01 福建龙净环保股份有限公司 The verification method of a kind of sulphur trioxide sampling test macro and device
CN104122374A (en) * 2014-08-14 2014-10-29 福建龙净环保股份有限公司 Method and device for checking sulfur trioxide sampling test system
CN105876590A (en) * 2014-09-10 2016-08-24 中国检验检疫科学研究院 Novel ethyl formate quantitative dosing system
CN104266866A (en) * 2014-09-15 2015-01-07 孚派特环境科技（苏州）有限公司 Portable multistage suction filtration system
CN105731394A (en) * 2015-12-31 2016-07-06 安阳市岷山有色金属有限责任公司 Refined sulfuric acid preparation device and preparation method thereof
CN106153827A (en) * 2016-08-02 2016-11-23 华电电力科学研究院 Online sulfur trioxide apparatus for measuring concentration based on liquid absorption method and method
CN106596198A (en) * 2016-12-20 2017-04-26 哈尔滨工业大学 Online SO3 measuring system and method
CN106813954A (en) * 2017-01-23 2017-06-09 浙江菲达环保科技股份有限公司 A kind of sampling system suitable for the sampling of low concentration sulfur trioxide
CN107894491A (en) * 2017-10-27 2018-04-10 东南大学 Test the device and method of water soluble ion concentration in wet desulphurization neat stress
CN108303293A (en) * 2018-02-09 2018-07-20 华能国际电力股份有限公司 The sampling of sulfur trioxide and detecting system and method in a kind of fire coal boiler fume
CN109000997A (en) * 2018-10-09 2018-12-14 中国科学院过程工程研究所 A kind of SO3The method of sampling and device of detection device
CN109323895A (en) * 2018-10-23 2019-02-12 攀钢集团攀枝花钢铁研究院有限公司 Fixed on-line sampling system is always measured containing S for coke-stove gas
CN109323895B (en) * 2018-10-23 2021-09-14 攀钢集团攀枝花钢铁研究院有限公司 On-line sampling system for measuring total S content of coke oven gas
CN111426646A (en) * 2020-05-25 2020-07-17 中煤科工集团重庆研究院有限公司 Pretreatment method for detecting sulfur trioxide in discharged flue gas
CN111487094A (en) * 2020-05-25 2020-08-04 中煤科工集团重庆研究院有限公司 SO in the exhaust gas3Detection preprocessing system and using method thereof
CN111426646B (en) * 2020-05-25 2023-05-02 中煤科工集团重庆研究院有限公司 Pretreatment method for detecting sulfur trioxide in discharged flue gas
CN113230875A (en) * 2021-03-04 2021-08-10 昆明理工大学 Bayer process red mud dry method for removing SO in copper smelting high-temperature flue gas3Method and apparatus

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Application publication date: 20120418