CN105784692B - The assay method of sulfur dioxide in flue gas - Google Patents
The assay method of sulfur dioxide in flue gas Download PDFInfo
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- CN105784692B CN105784692B CN201410779828.1A CN201410779828A CN105784692B CN 105784692 B CN105784692 B CN 105784692B CN 201410779828 A CN201410779828 A CN 201410779828A CN 105784692 B CN105784692 B CN 105784692B
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Abstract
Present invention relates particularly to a kind of assay methods of sulfur dioxide in flue gas, include the following steps：1）Flue gas is preheated；2）Flue gas after preheating is led to and is equipped withIn the Pei Shi porous gas glass absorption cell 2 of L known concentration iodine solutions；3）When the blue of iodine solution all takes off most, gas fume valve 5, and the volume by reading flue gas with the volume flow quantity recorder 3 of the outlet of Pei Shi porous gas glass absorption cell 2 connection are closed；4）Calculate sulfur dioxide in flue gas concentration.The assay method of this sulfur dioxide in flue gas provided by the invention can effectively solve Water vapor condensation in flue gas and absorb SO at water2Cause the problem that measurement result is relatively low, heat tracing can be carried out using flue gas own temperature, increases adding apparatus without additional, and this method is easy to operate, material requested is easy to collect, and cost is relatively low.
Description
Technical field
Present invention relates particularly to a kind of assay methods of sulfur dioxide in flue gas.
Background technology
Contain a certain amount of SO in refinery's flue gas2, it is emitted into air and pollutes environment, therefore its content need to be carried out accurately
It measures.Sulfur dioxide gas Nature comparison is stablized, and test equipment of the generally use with SO 2 sensor is directly surveyed at present
Amount, although current assay method can accurately measure the content of sulfur dioxide in flue gas, however require that using specific
Test equipment, not only the cost is relatively high, and detection range has certain limitations that (detection of SO 2 sensor is limited to
150ppm) 。
Meanwhile using Instrument measuring because flue-gas temperature is higher, and contain vapor, condenses into water afterwards to the cold, not only absorb
SO in flue gas2And pollution instrument detection device, it causes measurement result relatively low or causes instrument bad, cumbersome Data duplication
Property difference and Instrument purchase and use cost it is high.
Invention content
The purpose of the present invention is overcoming, the assay method cost of the prior art is higher, detection range is limited, can not accurately survey
The problem of measuring content of sulfur dioxide.
For this purpose, the present invention provides a kind of assay method of sulfur dioxide in flue gas, include the following steps：
Step 1）Gas fume valve is opened, 8 ~ 12 points of preheating is carried out to flue gas by the heating device being connect with exhanst gas outlet
Clock；
Step 2）Flue gas after preheating is led to and is equipped withThe Pei Shi porous gas glass of L known concentration iodine solutions absorbs
Being added dropwise in pond, in the iodine solution has 2-3 drop starch indicators, and iodine solution is blue at this time；
Step 3）When iodine solution blue all take off most when, close gas fume valve, and by with Pei Shi porous gas glass
The volume flow quantity recorder of absorption cell outlet connection reads the volume of flue gas；
Step 4）Calculate sulfur dioxide in flue gas concentration：
Wherein：- iodine solution concentration, mol/L；
- sulfur dioxide in flue gas content, g/L；
- iodine solution volume, L；
- flue gas volume, L；
64-sulfur dioxide relative molecular weights, g/mol
The heating device by be connected to exhanst gas outlet binary channels flue gas sampling head, by binary channels flue gas sampling head with training
The interior heat-resistant hose of family name's porous gas glass absorption cell connection and the outer heat-resistant hose composition being placed in outside interior heat-resistant hose；
The binary channels flue gas sampling head both ends are respectively equipped with gas production import and gas production outlet, which goes out with flue gas
Mouth connection, the gas production outlet includes that interior gas production outlet and outer gas production export, after which connect with interior heat-resistant hose
It is passed through in Pei Shi porous gas glass absorption cells, outer gas production outlet is connect with outer heat-resistant hose.
The interior gas production outlet and outer gas production outlet diameter ratio are 1:4.
The volume integrated flow is calculated as wet gas flow meter.
The beneficial effects of the invention are as follows：The assay method of this sulfur dioxide in flue gas provided by the invention can be solved effectively
Certainly Water vapor condensation absorbs SO at water in flue gas2Cause the problem that measurement result is relatively low, can be carried out using flue gas own temperature
Heat tracing increases adding apparatus without additional, and this method is easy to operate, and material requested is easy to collect, and cost is relatively low.
Description of the drawings
Fig. 1 is the overall flow schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram of binary channels flue gas sampling head 1.
In figure：1, binary channels flue gas sampling head；2, Pei Shi porous gas glass absorption cell；3, volume flow quantity recorder；4、
Exhanst gas outlet；5, gas fume valve；6, interior heat-resistant hose；7, outer heat-resistant hose；8, gas production import；9, interior gas production outlet；10, it adopts outside
Gas exports.
Specific implementation mode
Embodiment 1：
A kind of assay method of sulfur dioxide in flue gas as shown in Figure 1 is present embodiments provided, is included the following steps：
Step 1）Gas fume valve 5 is opened, 8 ~ 12 points of preheating is carried out to flue gas by the heating device being connect with exhanst gas outlet 4
Clock；
Step 2）Flue gas after preheating is led to and is equipped withThe Pei Shi porous gas glass of L known concentration iodine solutions absorbs
Being added dropwise in pond 2, in the iodine solution has 2-3 drop starch indicators, and iodine solution is blue at this time；
Step 3）When iodine solution blue all take off most when, close gas fume valve 5, and by with Pei Shi porous gas glass
The volume flow quantity recorder 3 of the outlet of absorption cell 2 connection reads the volume of flue gas；
Step 4）Calculate sulfur dioxide in flue gas concentration：
Wherein：- iodine solution concentration（Known concentration iodine solution）, mol/L；
- sulfur dioxide in flue gas content, g/L；
- iodine solution volume, L；
- flue gas volume, L；
64-sulfur dioxide relative molecular weights, g/mol
Heating device by be connected to exhanst gas outlet 4 binary channels flue gas sampling head 1, by binary channels flue gas sampling head 1 with training
The interior heat-resistant hose 6 that family name's porous gas glass absorption cell 2 is connected to and the composition of outer heat-resistant hose 7 being placed in outside interior heat-resistant hose 6；
1 both ends of binary channels flue gas sampling head are respectively equipped with gas production import 8 and gas production outlet, which goes out with flue gas
Mouth 4 is connected to, and the gas production outlet includes interior gas production outlet 9 and outer gas production outlet 10, and the interior gas production interface and interior heat-resistant hose 6 connect
It is passed through after connecing in Pei Shi porous gas glass absorption cell 2, outer gas production outlet 10 is connect with outer heat-resistant hose 7.Interior gas production exports 9 Hes
It is 1 that outer gas production, which exports 10 diameter ratios,:4, volume flow quantity recorder 3 is wet gas flow meter.
The preparation of iodine solution：Accurately weigh 1.27g powdered pure iodine（AR grades）, and claim 4g potassium iodide, it is allowed to a small amount of water
It is completely dissolved, is transferred in 1000ml volumetric flasks, constant volume 1000ml shakes up, this solution is taken to dilute 100 times to get 5 × 10-5mol/L
Iodine solution.
The principle of the present invention is：Sulfur dioxide has reproducibility, can make iodine（I2）It is reduced into iodide ion（I-）, work as sulfur dioxide
It is passed through in iodine-starch solution, then solution is become colorless by blue：
SO2+I2+2H2O=H2SO4+2HI。
Embodiment 2：
On the basis of embodiment 1, gone out respectively with interior gas production outlet 9, outer gas production with interior heat-resistant hose 6, outer heat-resistant hose 7
Mouth 10 connects, careful to open gas fume valve 5 in the case where not being connected to porous gas glass absorption cell 2 Pei Shi, connects flue gas and leads to
It crosses heating device and carries out preheating 10 minutes, prevent vapor in flue gas from being condensed in heat tracing inner tube.Accurately pipette a certain amount of 5 ×
10-5The iodine solution of mol/L, injection Pei Shi porous gas glass absorption cell 2, adds 2-3 drop starch indicators, and solution is in indigo plant at this time
Color is exported with silicone tube connection wet gas flow meter with Pei Shi porous gas glass absorption cell 2.Gas fume valve 5 is turned down, by companion
The interior heat-resistant hose 6 of thermal is connected to 2 entrance of Pei Shi porous gas glass absorption cell, and start recording meter body product
Value, then big gas fume valve 5 is slowly opened, so that the gas into absorption cell is formed the bubble that interval rises, to ensure in flue gas
Sulfur dioxide be fully absorbed, when solution blue all take off most when, immediately close gas fume valve 5, read wet type gas stream
Gauge obtains the flue gas volume by absorption cell, specific detection example is shown in Table 1：
1 sulfur dioxide in flue gas testing result of table
In conclusion the assay method of this sulfur dioxide in flue gas provided by the invention can effectively solve water in flue gas
Devaporation absorbs SO at water2Cause the problem that measurement result is relatively low, heat tracing can be carried out using flue gas own temperature, be not necessarily to volume
Outer increase adding apparatus, and this method is easy to operate, material requested is easy to collect, and cost is relatively low.
The part that the present embodiment does not specifically describe belongs to the common knowledge and known technology of the art, herein not
Another one is described in detail.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
Be with the present invention it is same or analogous design all belong to the scope of protection of the present invention within.
Claims (3)
1. the assay method of sulfur dioxide in flue gas, which is characterized in that include the following steps：
Step 1) opens gas fume valve (5), and preheating 8~12 is carried out to flue gas by the heating device being connect with exhanst gas outlet (4)
Minute；
Step 2), which leads to the flue gas after preheating, is equipped with v1The Pei Shi porous gas glass absorption cells (2) of L known concentration iodine solutions
Interior, being added dropwise in the iodine solution has 2-3 drop starch indicators, and iodine solution is blue at this time；
Step 3) closes gas fume valve (5), and by being inhaled with Pei Shi porous gas glass when the blue of iodine solution all takes off most
The volume flow quantity recorder (3) of receives pond (2) outlet connection reads the volume of flue gas；
Step 4) calculates sulfur dioxide in flue gas concentration c2：
Wherein：c1- iodine solution concentration, mol/L；
c2- sulfur dioxide in flue gas content, g/L；
v1- iodine solution volume, L；
v2- flue gas volume, L；
64-sulfur dioxide relative molecular weights, g/mol；
The heating device by be connected to exhanst gas outlet (4) binary channels flue gas sampling head (1), by binary channels flue gas sampling head
(1) the interior heat-resistant hose (6) that is connected to Pei Shi porous gas glass absorption cells (2) and it is placed in interior heat-resistant hose (6) outside outer
Heat-resistant hose (7) forms；
Binary channels flue gas sampling head (1) both ends be respectively equipped with gas production import (8) and gas production outlet, the gas production import (8) with
Exhanst gas outlet (4) is connected to, and gas production outlet includes that interior gas production outlet (9) and outer gas production export (10), the interior gas production interface and
It is passed through in Pei Shi porous gas glass absorption cells (2) after interior heat-resistant hose (6) connection, outer gas production outlet (10) and outer heat-resistant hose
(7) it connects.
2. the assay method of sulfur dioxide in flue gas according to claim 1, it is characterised in that：The interior gas production outlet
(9) and outer gas production outlet (10) diameter ratio is 1:4.
3. the assay method of sulfur dioxide in flue gas according to claim 1, it is characterised in that：The volume integrated flow
It is wet gas flow meter to count (3).
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| CN201410779828.1A CN105784692B (en) | 2014-12-17 | 2014-12-17 | The assay method of sulfur dioxide in flue gas |
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| CN105784692A CN105784692A (en) | 2016-07-20 |
| CN105784692B true CN105784692B (en) | 2018-08-14 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290718A (en) * | 2016-07-22 | 2017-01-04 | 苏州优谱德精密仪器科技有限公司 | Gas analysis and absorption plant |
| CN106525833A (en) * | 2016-11-08 | 2017-03-22 | 江苏中烟工业有限责任公司 | Method for determining sulfur dioxide in cigarette main stream smoke through a continuous flow analyzer |
| CN109613173A (en) * | 2018-12-21 | 2019-04-12 | 陕西延长石油（集团）有限责任公司延安石油化工厂 | A kind of method that constant-current titration measures mercaptan sulfur in gas |
| CN109959625A (en) * | 2019-03-21 | 2019-07-02 | 成都凯天电子股份有限公司 | On-line analysis detects SO2The method of content |
| CN113447604A (en) * | 2021-05-28 | 2021-09-28 | 中国石油化工股份有限公司 | Be arranged in simultaneous detection flue gas SO2、SO3Apparatus and method of |
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| JP4817713B2 (en) * | 2005-05-20 | 2011-11-16 | 株式会社堀場製作所 | Method and apparatus for analyzing sulfur compounds |
| CN102323264A (en) * | 2011-09-30 | 2012-01-18 | 中国冶金矿业鞍山冶金设计研究院有限责任公司 | Method and device for testing content of sulfur in iron ore |
| JP2013040825A (en) * | 2011-08-12 | 2013-02-28 | Jfe Steel Corp | Analysis method and analyzer |
| CN203101274U (en) * | 2013-03-04 | 2013-07-31 | 中国人民共和国黄岛出入境检验检疫局 | Device for detecting sulfur dioxide residue |
| CN203572812U (en) * | 2013-10-29 | 2014-04-30 | 河北冀衡集团有限公司蓝天分公司 | Device for measuring concentration of sulfur dioxide at outlet of converter during production of sulfuric acid |
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2014
- 2014-12-17 CN CN201410779828.1A patent/CN105784692B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4817713B2 (en) * | 2005-05-20 | 2011-11-16 | 株式会社堀場製作所 | Method and apparatus for analyzing sulfur compounds |
| JP2013040825A (en) * | 2011-08-12 | 2013-02-28 | Jfe Steel Corp | Analysis method and analyzer |
| CN102323264A (en) * | 2011-09-30 | 2012-01-18 | 中国冶金矿业鞍山冶金设计研究院有限责任公司 | Method and device for testing content of sulfur in iron ore |
| CN203101274U (en) * | 2013-03-04 | 2013-07-31 | 中国人民共和国黄岛出入境检验检疫局 | Device for detecting sulfur dioxide residue |
| CN203572812U (en) * | 2013-10-29 | 2014-04-30 | 河北冀衡集团有限公司蓝天分公司 | Device for measuring concentration of sulfur dioxide at outlet of converter during production of sulfuric acid |
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| CN105784692A (en) | 2016-07-20 |
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Address after: 727406 Yanan refinery, Jiao Kou Town, Luochuan, Yanan, Shaanxi Patentee after: Shaanxi Yanchang Petroleum (Group) Co., Ltd. Yanan oil refinery Address before: 727406 Shaanxi Yulin Jingbian Hedong Yulin refinery Patentee before: Shaanxi Yanchang Petroleum (Group) Co., Ltd. Yanan oil refinery |