CN112014520B - Exhaust gas measuring device - Google Patents
Exhaust gas measuring device Download PDFInfo
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- CN112014520B CN112014520B CN201911369058.2A CN201911369058A CN112014520B CN 112014520 B CN112014520 B CN 112014520B CN 201911369058 A CN201911369058 A CN 201911369058A CN 112014520 B CN112014520 B CN 112014520B
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- space
- sample gas
- discharge port
- dust removing
- dust
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0011—Sample conditioning
-
- 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
-
- 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
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
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- Immunology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The exhaust gas measuring apparatus of the present invention can eliminate a state in which sulfuric acid is present in a flow path of a sample gas, and comprises: a sample gas introduction unit for introducing a sample gas; a pretreatment unit for pretreating the introduced sample gas; an analysis unit for analyzing the sample gas subjected to the pretreatment; the pretreatment unit includes a dust removal device for removing dust in a sample gas, and the dust removal device includes: a housing having an interior space; the dust removing filter is arranged in the inner space of the shell and is used for separating the inner space into a first space and a second space; a sample gas inlet which communicates with the upper part of the first space and allows the introduced sample gas to flow into the first space; a sample gas outlet connected to the upper part of the second space, and allowing the sample gas passing through the dust removal filter to flow out of the housing; a first discharge port for discharging the liquid in the first space; a second discharge port for discharging the liquid in the second space; and an opening/closing mechanism for opening/closing the first discharge port.
Description
Technical Field
The present invention relates to an exhaust gas measurement device.
Background
There is an exhaust gas measuring device for measuring the concentration of multiple components in combustion exhaust gas (see patent document 1). Such an exhaust gas measurement device is generally provided with a pretreatment unit for removing dust and moisture in a sample gas.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 5-281186
Disclosure of Invention
Technical problem to be solved by the invention
SO is present in the sample gas introduced into the exhaust gas measuring device 3 In the case of SO 3 The water in the sample gas is combined with the water to become sulfuric acid (H 2 SO 4 ). Since sulfuric acid has a high boiling point, it is atomized in the exhaust gas measuring device (hereinafter, atomized sulfuric acid is referred to as sulfuric acid mist). If sulfuric acid mist flows into the device for measurementAnd an analysis unit for measuring the concentration of the component in the sample gas, the electrode provided in the analysis unit is corroded. Therefore, it is necessary to provide a portion of the analysis section further forward than the analysis section with a function of removing sulfuric acid mist from the sample gas.
The function of removing sulfuric acid mist from the sample gas may be provided in a dust removing device for removing dust in the sample gas. In this case, although an outlet for discharging sulfuric acid removed from the sample gas may be provided at an arbitrary position of the dust removing device, in the conventional dust removing device, sulfuric acid may remain in the dust removing device, and in such a case, an acid such as sulfuric acid may be present in the flow path of the sample gas. If an acid such as sulfuric acid is present in the dust removing device, the acid gradually accumulates and flows downstream together with the sample gas, and there is a risk of corroding the analysis section.
The present invention has been made in view of the above-described problems, and an object of the present invention is to eliminate the presence of sulfuric acid in a flow path of a sample gas.
Solution for solving the technical problems
The exhaust gas measuring device of the present invention comprises: a sample gas introduction unit for introducing a sample gas; a pretreatment unit configured to perform pretreatment of the sample gas introduced by the sample gas introduction unit; an analysis unit that analyzes the sample gas subjected to the pretreatment in the pretreatment unit, the pretreatment unit including a dust removal device that removes dust from the sample gas, the dust removal device including: a housing having an interior space; a cylindrical dust removing filter provided in the inner space of the housing to separate the inner space into a first space and a second space surrounding an outer periphery of the first space; a sample gas inlet which communicates with an upper portion of the first space and allows the sample gas introduced from the sample gas introduction portion to flow into the first space; a sample gas outlet which is communicated with the upper part of the second space and is used for enabling the sample gas passing through the dust removing filter to flow out of the shell; a first discharge port communicated with the bottom surface of the first space for discharging the liquid in the first space to the outside of the housing; a second discharge port communicated with the bottom surface of the second space for discharging the liquid in the second space to the outside of the housing; and an opening and closing mechanism for opening and closing the first discharge port.
The dust removing device will be described herein. The sample gas flows into the upper part of the first space through the sample gas inlet, flows into the second space through the dust removing filter, and flows out of the dust removing device through the sample gas outlet. As the sample gas passes through the dust filter, dust in the sample gas is captured by the dust filter. The gas component in the sample gas flowing into the first space is discharged to the outside of the second space from the sample gas outlet communicating with the upper portion of the second space, while the sulfuric acid mist mixed in the sample gas falls downward by gravity to be separated from the gas component. Thereby, the sulfuric acid mist is removed from the sample gas in the dust removing device. Most of the sulfuric acid mist mixed in the sample gas passes through the dust removing filter together with the sample gas, flows into the second space from the first space, and falls downward. Therefore, the discharge port (second discharge port) communicates with the bottom surface of the second space in advance, and the liquid (sulfuric acid) in the second space can be discharged to the outside of the casing. On the other hand, a part of the sulfuric acid mist mixed in the sample gas cannot pass through the dust-removing filter completely and remains in the first space, and falls down to the lower part of the first space due to gravity. In the present invention, the discharge port (first discharge port) is also communicated with the first space, so that the sulfuric acid remaining in the first space can be discharged to the outside of the casing as well.
Effects of the invention
In the exhaust gas measuring device according to the present invention, the first exhaust port is communicated with the bottom surface of the first space of the dust removing device, and the second exhaust port is communicated with the bottom surface of the second space, so that all the sulfuric acid in the internal space of the dust removing device can be exhausted to the outside of the dust removing device, and the state in which the sulfuric acid exists in the flow path of the sample gas can be eliminated.
Drawings
Fig. 1 is a schematic configuration diagram showing an embodiment of an exhaust gas measurement device.
Fig. 2 is a schematic configuration cross-sectional view showing the configuration of the dust removing device of this embodiment.
Detailed Description
An embodiment of the exhaust gas measuring device of the present invention will be described below with reference to the drawings.
As shown in fig. 1, the exhaust gas measurement device includes a sample gas introduction unit 2, a pretreatment unit 4, a pump 6, an analysis unit 8, and an arithmetic processing unit 10.
The pretreatment unit 4 includes a dust removing device 12 and a dehumidifying device 14. The dust removing device 12 is used for removing dust in the sample gas, and the dehumidifying device 14 is used for removing moisture in the sample gas. The dust removing device 12 has a function of removing not only dust in the sample gas but also sulfuric acid mist contained in the sample gas. The structure of the dust removing device 12 will be described later.
The analysis unit 8 measures the components in the sample gas passing through the pretreatment unit 4. As the analysis unit 8, a unit capable of performing a process on N can be used 2 、SO 2 、NO、CO、CO 2 、O 2 URA-208 (product of Shimadzu corporation) for measuring these various components.
The arithmetic processing device 10 uses the measurement data obtained by the analysis unit 8 to perform an arithmetic process such as quantifying the concentration of each component. The arithmetic processing device 10 is implemented by a general-purpose personal computer or a special-purpose computer.
Fig. 2 shows an example of the structure of the dust removing device 12.
The dust removing device 12 has a housing 16 formed of a main body 18 and a cover 20. The main body 18 is a tubular member having an upper opening, and the cover 20 is attached to the upper portion of the main body 18 via a gasket 22 so as to close the opening of the main body 18. A cylindrical dust filter 30 is provided in the main body 18 of the housing 16. The interior space 24 of the housing 16 is divided into a first space 26 and a second space 28 by a dust filter 30. The first space 26 is a space inside the dust filter 30, and the second space 28 is a space between the outer peripheral surface of the dust filter 30 and the inner peripheral surface of the main body 18. As the dust filter 30, for example, a membrane filter may be used.
The cover 20 is provided with a sample gas inlet 32 for allowing the sample gas to flow into the internal space 24 of the housing 16. The sample gas inlet 32 communicates with the first space 26. A sample gas outlet 34 for allowing the sample gas in the internal space 24 to flow out of the dust removing device 12 is provided in an upper side portion of the main body 18. A first discharge port 36 and a second discharge port 38 are provided in a lower portion of the main body 18. The first discharge port 36 communicates with the bottom surface of the first space 26, and the second discharge port 38 communicates with the bottom surface of the second space 28. The first discharge port 36 and the second discharge port 38 are connected to a common three-way switching valve 40 (opening/closing mechanism), and the opening/closing state of the first discharge port 36 and the second discharge port 38 can be switched by the three-way switching valve 40. The three-way switching valve 40 may be automatically switched at a predetermined timing by a control device not shown, or may be manually switched at a desired timing by a user.
In the present embodiment, the open/close states of the first discharge port 36 and the second discharge port 38 are switchable by the common three-way switching valve 40, but the present invention is not limited to this, and an on-off valve (switching mechanism) for switching the open/close states of the first discharge port 36 may be separately provided. In this case, an opening/closing valve for switching the open/close state of the second discharge port 38 may be separately provided, or may not be provided. When the opening/closing valves for switching the opening/closing states of the first discharge port 36 and/or the second discharge port 38 are provided, the opening/closing valves may be automatically switched at predetermined timings by a control device, not shown, or may be manually switched at desired timings by a user.
The sample gas flowing into the first space 26 in the housing 16 from the sample gas inlet 32 flows out of the dust removing device 12 from the sample gas outlet 34 through the dust removing filter 30. As the sample gas passes through the dust filter 30, dust is captured by the dust filter 30, thereby removing dust in the sample gas.
In addition, SO present in the sample gas 3 Combines with the moisture in the sample gas to form sulfuric acid (H 2 SO 4 ). The sample gas is heated to a high temperature and boiling point before flowing into the dust removing device 12The high sulfuric acid is atomized and flows into the dust removing device 12. The sulfuric acid mist flowing into the dust removing device 12 falls downward in the first space 26 and the second space 28 due to gravity, and accumulates at the bottoms of the first space 26 and the second space 28, respectively. By opening the first discharge port 36, the sulfuric acid accumulated in the bottom of the first space 26 can be discharged to the outside of the dust removing device 12, and by opening the second discharge port 38, the sulfuric acid accumulated in the bottom of the second space 28 can be discharged to the outside of the dust removing device 12.
In addition, a suction pump for sucking the liquid in the first space 26 through the first discharge port 36 and sucking the liquid in the second space 28 through the second discharge port 38 may be provided in the flow path on the downstream side of the three-way switching valve 40. By providing such a suction pump, the sulfuric acid in the first space 26 and the second space 28 can be more reliably discharged to the outside of the dust removing device 12.
As described above, in the exhaust gas measurement device according to the present embodiment, the dust removing device 12 for removing dust in the sample gas has a function of removing sulfuric acid mist, and the sulfuric acid accumulated in the internal space 24 of the dust removing device 12 can be discharged to the outside of the dust removing device 12 by opening the first discharge port 36 and the second discharge port 38, so that the state in which sulfuric acid exists in the flow path of the sample gas can be eliminated.
The above-described examples merely show an example of the embodiment of the exhaust gas measurement device of the present invention. Embodiments of the exhaust gas measuring device of the present invention are described below.
In an embodiment of the exhaust gas measurement device of the present invention, the exhaust gas measurement device includes: a sample gas introduction unit for introducing a sample gas; a pretreatment unit configured to perform pretreatment of the sample gas introduced by the sample gas introduction unit; an analysis unit that analyzes the sample gas subjected to the pretreatment in the pretreatment unit, the pretreatment unit including a dust removal device that removes dust from the sample gas, the dust removal device including: a housing having an interior space; a cylindrical dust removing filter provided in the inner space of the housing to separate the inner space into a first space and a second space surrounding an outer periphery of the first space; a sample gas inlet which communicates with an upper portion of the first space and allows the sample gas introduced from the sample gas introduction portion to flow into the first space; a sample gas outlet which is communicated with the upper part of the second space and is used for enabling the sample gas passing through the dust removing filter to flow out of the shell; a first discharge port communicated with the bottom surface of the first space for discharging the liquid in the first space to the outside of the housing; a second discharge port communicated with the bottom surface of the second space for discharging the liquid in the second space to the outside of the housing; and an opening and closing mechanism for opening and closing the first discharge port.
In a first aspect of the above-described embodiment of the exhaust gas measurement device according to the present invention, the opening and closing mechanism is a three-way switching valve for switching to any one of the following states: a state in which the first discharge port is opened and the second discharge port is closed, and a state in which the first discharge port is closed and the second discharge port is opened. According to this aspect, the structure of the opening/closing mechanism can be simplified.
In a second aspect of the above-described embodiment of the exhaust gas measurement device according to the present invention, the dust removal device includes a suction pump for sucking the liquid in the first space through the first discharge port and sucking the liquid in the second space through the second discharge port. According to such a configuration, the liquid in the first space and the liquid in the second space can be more reliably discharged to the outside of the dust removing device 12.
In a third aspect of the above-described embodiment of the exhaust gas measurement device according to the present invention, the pretreatment unit includes a dehumidifying device for dehumidifying the sample gas flowing out from the sample gas outlet of the dust removing device. This allows the pretreatment unit to have a function of removing dust, sulfuric acid mist, and moisture in the sample gas.
The above-described first to third aspects can be freely combined with each other.
Description of the reference numerals
2. Sample gas introduction unit
4. Pretreatment unit
6. Pump with a pump body
8. Analysis unit
10. Arithmetic processing device
12. Dust removing device
14. Dehumidifying device
16. Shell body
18. Main body part
20. Cover part
22. Gasket
24. Interior space
26. A first space
28. Second space
30. Dust-removing filter
32. Sample gas inlet
34. Sample gas outlet
36. A first outlet
38. Second discharge outlet
40. Three-way switching valve (switching mechanism).
Claims (5)
1. An exhaust gas measurement device is characterized by comprising:
a sample gas introduction unit for introducing a sample gas;
a pretreatment unit configured to perform pretreatment of the sample gas introduced by the sample gas introduction unit;
an analysis unit for analyzing the sample gas pretreated by the pretreatment unit,
the pretreatment part comprises a dust removing device for removing dust and sulfuric acid mist in the sample gas,
the dust removing device is provided with:
a housing having an interior space;
a cylindrical dust removing filter provided in the inner space of the housing to separate the inner space into a first space and a second space surrounding an outer periphery of the first space, the dust removing filter being disposed from an inner upper surface to an inner lower surface of the housing;
a sample gas inlet which communicates with an upper portion of the first space and allows the sample gas introduced from the sample gas introduction portion to flow into the first space;
a sample gas outlet which is communicated with the upper part of the second space and is used for enabling the sample gas passing through the dust removing filter to flow out of the shell;
a first outlet communicated with the bottom surface of the first space for flowing out the liquid containing sulfuric acid in the first space to the outside of the shell;
a second outlet communicated with the bottom surface of the second space for flowing out the liquid containing sulfuric acid in the second space to the outside of the shell;
and an opening and closing mechanism for opening and closing the first discharge port.
2. The exhaust gas measurement device according to claim 1, wherein,
the switching mechanism is a three-way switching valve and is used for switching to any one of the following states: a state in which the first discharge port is opened and the second discharge port is closed, and a state in which the first discharge port is closed and the second discharge port is opened.
3. The exhaust gas measurement device according to claim 1, wherein,
the dust removing device is provided with a suction pump for sucking the liquid in the first space through the first discharge port and sucking the liquid in the second space through the second discharge port.
4. The exhaust gas measurement device according to claim 2, wherein,
the dust removing device is provided with a suction pump for sucking the liquid in the first space through the first discharge port and sucking the liquid in the second space through the second discharge port.
5. The exhaust gas measurement device according to any one of claims 1 to 4, wherein,
the pretreatment unit includes a dehumidifying device for dehumidifying the sample gas flowing out from the sample gas outlet of the dust removing device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-101262 | 2019-05-30 | ||
| JP2019101262A JP2020193936A (en) | 2019-05-30 | 2019-05-30 | Exhaust gas measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112014520A CN112014520A (en) | 2020-12-01 |
| CN112014520B true CN112014520B (en) | 2023-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911369058.2A Active CN112014520B (en) | 2019-05-30 | 2019-12-26 | Exhaust gas measuring device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2020193936A (en) |
| CN (1) | CN112014520B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117213931A (en) * | 2022-12-12 | 2023-12-12 | 江苏恩达通用设备集团有限公司 | Novel diesel engine exhaust gas monitor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05281186A (en) * | 1992-03-30 | 1993-10-29 | Shimadzu Corp | Combustion exhaust gas measuring device |
| JP2005114700A (en) * | 2003-10-07 | 2005-04-28 | Murata Keisokuki Service Kk | Analysis pretreatment method and device for atmospheric aerosol particle used for pixe analysis |
| CN201969449U (en) * | 2010-12-22 | 2011-09-14 | 居琴 | Deashing and dedusting device |
| CN102580431A (en) * | 2011-04-20 | 2012-07-18 | 庄建中 | Dedusting and dusulfuration integration process for smoke |
| CN203183875U (en) * | 2013-04-17 | 2013-09-11 | 西安同大实业有限公司 | High-efficiency tail gas separator for nitric acid device |
| CN208372737U (en) * | 2018-05-16 | 2019-01-15 | 陕西燎原净化设备有限公司 | A kind of phosphoric acid tail gas purification recovery device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6803025B2 (en) * | 2002-12-05 | 2004-10-12 | Frank B. Meserole | Process for removing SO3/H2SO4 from flue gases |
-
2019
- 2019-05-30 JP JP2019101262A patent/JP2020193936A/en active Pending
- 2019-12-26 CN CN201911369058.2A patent/CN112014520B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05281186A (en) * | 1992-03-30 | 1993-10-29 | Shimadzu Corp | Combustion exhaust gas measuring device |
| JP2005114700A (en) * | 2003-10-07 | 2005-04-28 | Murata Keisokuki Service Kk | Analysis pretreatment method and device for atmospheric aerosol particle used for pixe analysis |
| CN201969449U (en) * | 2010-12-22 | 2011-09-14 | 居琴 | Deashing and dedusting device |
| CN102580431A (en) * | 2011-04-20 | 2012-07-18 | 庄建中 | Dedusting and dusulfuration integration process for smoke |
| CN203183875U (en) * | 2013-04-17 | 2013-09-11 | 西安同大实业有限公司 | High-efficiency tail gas separator for nitric acid device |
| CN208372737U (en) * | 2018-05-16 | 2019-01-15 | 陕西燎原净化设备有限公司 | A kind of phosphoric acid tail gas purification recovery device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2020193936A (en) | 2020-12-03 |
| CN112014520A (en) | 2020-12-01 |
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