CN106442082A - Sampling method for exhaust gas of acid-making process - Google Patents
Sampling method for exhaust gas of acid-making process Download PDFInfo
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- CN106442082A CN106442082A CN201610878572.9A CN201610878572A CN106442082A CN 106442082 A CN106442082 A CN 106442082A CN 201610878572 A CN201610878572 A CN 201610878572A CN 106442082 A CN106442082 A CN 106442082A
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- making process
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N2001/2282—Devices for withdrawing samples in the gaseous state with cooling means
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a sampling method for exhaust gas of an acid-making process. A sampler applied to the method comprises a sampling section, a cooling and coagulation removing section and a primary filtering section. The whole process of the sample gas from the primary filtering section to an analysis meter is adopted for keeping warm and controlling temperature for the whole process of the sample gas at the temperature of 110-120 DEG C. A ceramic sintered grain filtering material with the grain size of 3 microns is used as the filtering material. According to the heat-insulating, heat-radiating and cooling technical scheme provided by the invention, the integrity of the sample gas at the two key aspects of components and contents thereof is guaranteed. A sampling pipe, an inner cover and a drum in which the sampling pipe is arranged are respectively made from 310S stainless steel, so that the service life of the sampling pipe according to the invention is long.
Description
Technical field
The present invention relates to a kind of sampling method, in particular to a kind of acid-making process sampling method.
Background technology
SO is mainly contained in acid-making process tail gas2、SO3There is the tail gas of pollution to atmospheric environment with NOx etc..Selective catalysis
Method of reducing (SCR) is a handling process to downstream process device.Wherein in the tail gas containing NOx, ammonia, carbamide are sprayed into
Or other nitrogen-containing compounds so as in NOx be reduced into N2And water, then SO is processed through desulphurization reaction2And SO3After discharged.
Reduction reaction is carried out in higher temperature range (850 1100 DEG C), it is not necessary to catalyst, referred to as SNCR
(SNCR)；Reduction reaction is carried out in relatively low temperature range (315 400 DEG C), needs catalyst, referred to as selective catalysis
Reduction (SCR).
Due to technological operation and the needs of environmental protection, analysis of nitrogen oxide system is provided with the reacted import and export of SCR
AT1 and AT2, for monitoring the amount of nitrogen oxides in its import and export gas after acid-making process tail gas denitration SCR reaction.
The existing survey of the amount of nitrogen oxides in its import and export gas is monitored after acid-making process tail gas denitration SCR reaction
Amount method is using dry and cold method, that is, pass through sampling probe and pipeline, by the sample gas that imports and exports with pumping in sampling processing cabinet,
Cooled down by electricity refrigeration, sample gas are cooled to 10 DEG C or so, the moisture content in sample gas is removed, be to remove water the drawbacks of this method
While also remove the SO for being dissolved in water2And SO3While also eliminate most of NOx.
Content of the invention
In order to overcome the shortcomings of prior art, the invention provides a kind of acid-making process exhaust sampling method.
The present invention provides a kind of acid-making process exhaust sampling method, and methods described is sampled with following samplers, the sampling
Device includes cooling except coagulating section and primary filter section, its improvement is that the cooling except coagulate section be by sample temperature degree from 300-
500 DEG C are down to 110-120 DEG C of cooling except section is coagulated, and the constant temperature zone of the constant temperature is the primary filter section end to gas analyses
Sample gas transportation section between instrument；The cooling section includes the radiating sleeve being made up of inwall and shell, and one end of the radiating sleeve is coaxial
The heart is sequentially provided with cooling except solidifying section, interior cover body and sampling tube.
First preferred version is that the sample gas is tail selectivity SCR sulphuric acid plant tail gas, by mole meter
Gas contains Ar：0.84～0.89；CO2：2.20～2.26；NO：0.13/0.14；N2：70.16～74.45；O2：10.21～11.09；
SO2：4.47～4.57；SO3：0.19～0.27；H2O：6.23～11.67.
Second preferred version is that methods described is sampled with following samplers, and the sampler includes cooling except solidifying section is with just
Level fillter section, it is characterised in that the cooling is introduced and outlet except solidifying section and primary filter section are respectively equipped with flushing water, is dry
Nitrogen inlet.
3rd preferred version is that the outer wall of the primary filter section is arranged with the shell vertical heart, the interior cover body and
Sampling tube is in cylinder；The outer wall, the shell and the cylinder one-shot forming and external diameter is equal.
4th preferred version is that leaving between the sampling pipe outer wall and the cover body inwall makes gas go out from the sampler
Mouth is again with airintake direction identical direction from the passage after out the direction contrary with airintake direction of passage described in tailing edge returns
The passage that the cooling passes through is entered except the gas for coagulating section；The wall includes horizontal direction and vertical direction wall；The drop
Temperature is provided with the injection mouth of a river except the outer wall for coagulating section；The passage is located at the bottom of its vertical direction and is provided with the injection water water outlet
Mouthful.
5th preferred version is that the other end of the radiating sleeve is provided with the primary filter that puts that hangs down with the axle center
Section；The outer wall of the primary filter section and the outer wall with the interior cylinder for being provided with the interior cover body are respectively equipped with perpendicular to described
The heat dissipating ring in axle center.
6th preferred version is, the cylinder of the sampling tube, the interior cover body and interior setting sampling tube respectively by
310S rustless steel is obtained.
7th preferred version is that the primary filter section includes that the taking-up handle for setting gradually, clam member, filter element are installed
Head and filter element；Vertical and clam member, two ends described in insertion respectively with the taking-up handle and be filled with the pottery that particle diameter is 3 μ
The connector of the filter element of sintering grain filtering material.
8th preferred version is, the filter element include cylindrical shroud and the one end positioned at the cylindrical shroud axle center be provided with
The axle of the external diameter disk such as described filter element.
With immediate prior art ratio, the present invention provide technical scheme have the advantages that：
The technical scheme that the present invention is provided is provided with insulation due to the transportation section that sample gas is exported to analyser from sampler
Heat tracing and Temperature Control Measures, accordingly ensure that sample gas are overcome in component and its integrity of two critical aspects of content
Prior art is in the deficiency of these two aspects；The cylinder due to the sampling tube, the interior cover body and interior setting sampling tube divides
It is not obtained by 310S rustless steel, thus the sampling tube long service life of the present invention.Say from another angle, be also to ensure that tailgas component
A kind of shielding measure not changed with its content.Furthermore, the fillter section that the present invention is arranged will be pressed from both sides in tail gas to greatest extent
The various particle contents of the different-grain diameter of band are reduced, so as to eliminate the impurity that wherein carries secretly to greatest extent to analysis result
Impact.
Description of the drawings
Fig. 1：The sampler schematic diagram that the present invention is provided；
Fig. 2：The filter structure schematic representation that the present invention is provided；
Fig. 3：The system block diagram that the present invention is provided.
Wherein：1- cooling is except solidifying section；2- fillter section；3- radiating sleeve；4- filtering material A；5- sampling tube；6- shell；In 7-
Wall；8- cleans water inlet；9- cooling is except solidifying section outer wall；10- heat dissipating ring；Cover body in 11-；12- discharge outlet；13- primary filter section
Outer wall；14- passage；15- cooling section outer wall；16- takes out handle；17- clam member；18- filter element mounting head；19- filter element；20-
Filtering material B；21- cylindrical shroud；22- axle.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of technical solution of the present invention is described in further detail.
Embodiment one
As shown in figure 1, the filter structure schematic representation for providing for the present invention, including the cooling containing filtering material A except solidifying
Section 1 and fillter section 2, are provided with lowering the temperature for radiating sleeve 3 and are sequentially provided with cooling except the one end for coagulating section 1 is concentric except solidifying section 1, interior cover body 11
With sampling tube 5；The cooling is except the setting concentric with shell 6 of solidifying section outer wall 9 and diameter is identical；The interior cover body 11 and sampling tube
5 in cylinder 15；During sampling, sample gas is flowed into from the bottom to top via sampling tube 5, after sample gas is flowed out from the outlet of the sampling tube 5
Passage along between 11 inwall of interior cover body and 5 outer wall of the sampling tube direction contrary with airintake direction reaches the cooling after returning
Cooling is carried out except solidifying except section 1 is coagulated.Cooling is except the outer wall for coagulating section outer wall 9 and the interior cylinder 15 for being provided with the interior cover body 11 respectively
The heat dissipating ring 10 being provided with perpendicular to the axle center, the sample gas through single filter is continued up, and is constituted via shell 6 and inwall 7
Radiating sleeve 3 enters the primary filter section 2 in the axle center for being placed in the radiating sleeve 3 of hanging down.The cooling is provided with except the outer wall for coagulating section 1
The injection mouth of a river 8.Sample gas is removed by cooling when coagulating section 1, injects water from the injection mouth of a river 8, and the water of injection is through erecting positioned at the passage 14
Nogata to the outlet 12 of bottom flow out.The single filter section outer wall 9, shell 6 and 15 one-shot forming of the cylinder
And external diameter is equal, the sampling tube 5, the interior cover body 11 and the interior cylinder for arranging sampling tube 5 do not divide 15 stainless by 316S
Steel is obtained.The cooling is that the sample temperature degree is down to 110-120 DEG C of cooling section from 400-450 DEG C except section 1 is coagulated, the sample
Gas is selectivity SCR sulphuric acid plant tail gas, and by mole meter, the tail gas contains Ar：0.84～0.89；CO2：2.20～
2.26；NO：0.13/0.14；N2：70.16～74.45；O2：10.21～11.09；SO2：4.47～4.57；SO3：0.19～
0.27；H2O：6.23～11.67；The cooling is respectively equipped with flushing water intake 8 and discharge outlet 12, the primary except solidifying section 1
Fillter section 2 is provided with drying nitrogen intake.
Embodiment two
As shown in Fig. 2 primary filter section 2 include to set gradually taking-up handle 16, clam member 17, filter element mounting head 18
And the material for core 19 between the chuck of the formation of circular-cylindrical jacket inner and outer wall 21；Perpendicular to 17 axle center of the clam member and institute
Connector 22 that is taking out 16 axle center of handle handle 16 described in insertion and being connected is stated with 19 axial direction of material for core.The filter
19 cross section of core is annular shape, is provided with through one end of the connector 22 of the circle ring center equal with the ring external diameter
Disk.The material for core 19 is cylindrical, and the inside is filled with ceramic post sintering grain that particle diameter is 3 μ as filtering material B, described
Fillter section outer layer is provided with fillter section outer wall 13, can be by the circular-cylindrical jacket being made up of inner and outer wall 21 from mistake by handle 16
Filter section outer wall 13 takes out.During work sample gas to flow through path as follows：Enter through by the sampling tube 5 after sampler from sampling tube 5
The passage for being formed between the inwall of outer wall and the interior cover body 11 direction in opposite direction with sampling tube 5 is entered flows into the one-level mistake
Filter section 9；The radiating isothermal holding of the radiating sleeve 3 is flowed into through single filter section 9 after processing；Enter after the isothermal holding that radiates and filter
Section is processed, then enters analyser analysis under tracing thermal-insulating.
Embodiment three
As shown in figure 3, be the sampler block diagram that the present invention is provided, a kind of acid-making process exhaust sampling that the present invention is provided
During device work, sample gas enters sampler by process pipe first, this process by sampler sampling probe completing, sample gas enters
After entering sampler, analyser being transported in the direction of arrows, has carried out whole heat tracing to guarantee component in the whole course of conveying of here
Integrity with content.
Tailgas component and its content parameter in embodiment at acid-making process sampler entrance and analyser entrance two sees below
Table：
The technical scheme that in table, the explanation of institute's column data is provided using the present invention makes going out with sampler for entrance analyser entrance
The NO to be surveyed in the sample gas of mouthXContent integrity, be obtain antacid tail gas in NOXAccurate data provide ensure.
It is to be understood that, the content of the invention of the present invention and specific embodiment are intended to prove technical side provided by the present invention
The practical application of case, should not be construed as limiting the scope of the present invention.Inspired by the spirit and principles of the present invention, ability
Field technique personnel can various modifications may be made, equivalent or improve, but these changes or modification are all applying for pending protection domain
Interior.
Claims (9)
1. a kind of acid-making process exhaust sampling method, the sampler of methods described includes cooling except coagulating section and primary filter section,
It is characterized in that the cooling is to remove to coagulate section by sample temperature degree from the 400-450 DEG C of cooling being down between 110-120 DEG C except section is coagulated,
The constant temperature zone of the constant temperature is the primary filter section end to the sample gas transportation section between sample gas analyzer；The cooling is except solidifying section
Including the radiating sleeve being made up of inwall and shell, one end of the radiating sleeve is concentric be sequentially provided with cooling cylinder, filling tank,
Interior cover body and sampling tube.
2. a kind of acid-making process exhaust sampling method according to claim 1, it is characterised in that the sample gas be
Sulphuric acid plant tail gas, by mole meter, the tail gas contains Ar：0.84～0.89；CO2：2.20～2.26；NO：0.13/
0.14；N2：70.16～74.45；O2：10.21～11.09；SO2：4.47～4.57；SO3：0.19～0.27；H2O：6.23～
11.67.
3. a kind of acid-making process exhaust sampling method according to claim 1, methods described is sampled with following samplers, described is taken
Sample device includes cooling except solidifying section and primary filter section, it is characterised in that the cooling is respectively equipped with punching except solidifying section and primary filter section
Wash water is introduced and outlet, drying nitrogen intake.
4. a kind of acid-making process exhaust sampling method according to claim 3, it is characterised in that the outer wall of the primary filter section
Arrange with the sampler shell vertical, the interior cover body and sampling tube are in cylinder；The outer wall, the shell and described
Cylinder one-shot forming and external diameter is equal.
5. a kind of acid-making process exhaust sampling method according to claim 4, it is characterised in that the sampling pipe outer wall with described
Leaving between cover body inwall makes gas export out the direction return contrary with airintake direction of passage described in tailing edge from the probe tube
From the passage, the passage that the cooling passes through except the gas for coagulating section is entered afterwards with airintake direction identical direction again；The wall bag
Include horizontal direction and vertical direction wall；The cooling is provided with the injection mouth of a river except the outer wall for coagulating section；The passage is located at
The bottom of its vertical direction is provided with the injection water outlet.
6. a kind of acid-making process exhaust sampling method according to claim 5, it is characterised in that the other end of the radiating sleeve sets
The primary filter section that being equipped with is hung down with the axle center puts；The outer wall of the primary filter section and the interior cover body is provided with interior
The outer wall of the cylinder is respectively equipped with the heat dissipating ring perpendicular to the axle center.
7. a kind of acid-making process exhaust sampling method according to claim 6, it is characterised in that the sampling tube, the inner cover
The cylinder of body and interior setting sampling tube is obtained by 310S rustless steel respectively.
8. a kind of acid-making process exhaust sampling method according to claim 7, it is characterised in that the fillter section includes to set successively
Taking-up handle, clam member, filter element mounting head and the filter element that puts；Vertical and clam member, two ends described in insertion respectively with described
Take out handle and be filled with the connector of the filter element of the ceramic post sintering grain filtering material that particle diameter is 3 μ.
9. a kind of acid-making process exhaust sampling method according to claim 8, it is characterised in that the filter element includes cylindrical shroud
The axle with external diameter disks such as the filter elements is provided with the one end for being located at the cylindrical shroud axle center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610878572.9A CN106442082A (en) | 2016-10-08 | 2016-10-08 | Sampling method for exhaust gas of acid-making process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610878572.9A CN106442082A (en) | 2016-10-08 | 2016-10-08 | Sampling method for exhaust gas of acid-making process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106442082A true CN106442082A (en) | 2017-02-22 |
Family
ID=58172379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610878572.9A Pending CN106442082A (en) | 2016-10-08 | 2016-10-08 | Sampling method for exhaust gas of acid-making process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106442082A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201191248Y (en) * | 2008-04-24 | 2009-02-04 | 北京普析通用仪器有限责任公司 | Novel counter-current type gas and liquid separator |
| CN102423586A (en) * | 2011-10-13 | 2012-04-25 | 北京雪迪龙科技股份有限公司 | Filter and analysis cabinet applying it |
| CN203224373U (en) * | 2013-02-07 | 2013-10-02 | 张世磊 | Anti-coagulating desulfuration sampling device |
| CN203365209U (en) * | 2013-06-15 | 2013-12-25 | 重庆特瑞尔分析仪器有限公司 | Backflowing type gas sampling probe |
| CN203758797U (en) * | 2014-03-25 | 2014-08-06 | 南京霍普斯科技有限公司 | Smoke measuring heating-type sampler capable of drawing out pre-filter |
| CN104614222A (en) * | 2015-01-27 | 2015-05-13 | 国家电网公司 | Ammonia measurement device for denitration of flue gas pipeline |
-
2016
- 2016-10-08 CN CN201610878572.9A patent/CN106442082A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201191248Y (en) * | 2008-04-24 | 2009-02-04 | 北京普析通用仪器有限责任公司 | Novel counter-current type gas and liquid separator |
| CN102423586A (en) * | 2011-10-13 | 2012-04-25 | 北京雪迪龙科技股份有限公司 | Filter and analysis cabinet applying it |
| CN203224373U (en) * | 2013-02-07 | 2013-10-02 | 张世磊 | Anti-coagulating desulfuration sampling device |
| CN203365209U (en) * | 2013-06-15 | 2013-12-25 | 重庆特瑞尔分析仪器有限公司 | Backflowing type gas sampling probe |
| CN203758797U (en) * | 2014-03-25 | 2014-08-06 | 南京霍普斯科技有限公司 | Smoke measuring heating-type sampler capable of drawing out pre-filter |
| CN104614222A (en) * | 2015-01-27 | 2015-05-13 | 国家电网公司 | Ammonia measurement device for denitration of flue gas pipeline |
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| PB01 | Publication | ||
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Application publication date: 20170222 |