CN220019122U - Flue gas dilution module, flue gas treatment device and mercury concentration monitoring device in flue gas - Google Patents
Flue gas dilution module, flue gas treatment device and mercury concentration monitoring device in flue gas Download PDFInfo
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- CN220019122U CN220019122U CN202321281127.6U CN202321281127U CN220019122U CN 220019122 U CN220019122 U CN 220019122U CN 202321281127 U CN202321281127 U CN 202321281127U CN 220019122 U CN220019122 U CN 220019122U
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- 238000010790 dilution Methods 0.000 title claims abstract description 147
- 239000012895 dilution Substances 0.000 title claims abstract description 147
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 125
- 239000003546 flue gas Substances 0.000 title claims abstract description 125
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 70
- 238000012806 monitoring device Methods 0.000 title abstract description 4
- 239000007789 gas Substances 0.000 claims abstract description 161
- 238000007599 discharging Methods 0.000 claims abstract description 10
- 238000005070 sampling Methods 0.000 claims description 24
- 238000006243 chemical reaction Methods 0.000 claims description 22
- 239000000779 smoke Substances 0.000 claims description 22
- 238000012544 monitoring process Methods 0.000 claims description 19
- 238000001914 filtration Methods 0.000 claims description 16
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000000523 sample Substances 0.000 description 36
- 239000012470 diluted sample Substances 0.000 description 16
- 238000007865 diluting Methods 0.000 description 14
- 238000007664 blowing Methods 0.000 description 6
- 239000004071 soot Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 231100000693 bioaccumulation Toxicity 0.000 description 1
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- 238000000605 extraction Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses a flue gas dilution module, a flue gas treatment device and a mercury concentration monitoring device in flue gas, wherein the flue gas dilution module comprises a flue, a conical tube and a siphon port, the flue is provided with a flue inlet, a dilution gas inlet and a dilution sample gas outlet, the conical tube is arranged in the flue, the conical tube is provided with an air inlet and an air outlet, the air inlet is communicated with the flue inlet, the cross section of the conical tube gradually reduces from the air inlet to the air outlet, the siphon port is positioned in the flue and is positioned at the downstream of the conical tube, the dilution gas inlet is communicated with the siphon port, the dilution sample gas outlet is positioned at the downstream of the siphon port, the dilution gas inlet is used for introducing dilution gas, the dilution gas and the flue gas are mixed into dilution sample gas through the siphon port, and the dilution sample gas outlet is used for discharging the dilution sample gas. The flue gas dilution module provided by the utility model has the advantages of high reliability and convenient and adjustable dilution ratio.
Description
Technical Field
The utility model relates to the technical field of mercury analysis, in particular to a flue gas dilution module, a flue gas treatment device and a device for monitoring mercury concentration in flue gas.
Background
Mercury pollution is extremely toxic, persistent, global and bioaccumulative. The mercury in the coal-fired flue gas mainly exists in three forms of gaseous zero-valent mercury, gaseous divalent ion mercury and granular mercury. For on-line monitoring of mercury emission, it is critical to accurately grasp the change rule of the concentration of the fixed source mercury emission in real time, so as to accurately obtain the total mercury emission measurement. The mercury concentration is detected, the flue gas is required to be diluted according to a preset proportion, and in the related art, the dilution module of the flue gas has the problems of low reliability and inconvenient dilution proportion adjustment.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems in the related art to some extent. To this end, an embodiment of the utility model proposes a flue gas dilution module.
The embodiment of the utility model also provides a flue gas treatment device and a device for monitoring the mercury concentration in flue gas.
The flue gas dilution module of the embodiment of the utility model comprises: the flue is provided with a smoke inlet, a dilution gas inlet and a dilution sample gas outlet, the conical tube is arranged in the flue and is provided with an air inlet and an air outlet, the air inlet is communicated with the smoke inlet, the cross section of the conical tube is gradually reduced from the air inlet to the air outlet, the siphon opening is positioned in the flue and is positioned at the downstream of the conical tube, the dilution gas inlet is communicated with the siphon opening, the dilution sample gas outlet is positioned at the downstream of the siphon opening, the dilution gas inlet is used for introducing dilution gas, the dilution gas and the smoke pass through the siphon opening to be mixed into dilution sample gas, and the dilution sample gas outlet is used for discharging the dilution sample gas.
The flue gas dilution module provided by the embodiment of the utility model dilutes the flue gas by adopting a siphon principle, and the diluted gas and the flue gas are mixed into diluted sample gas through a siphon port in a flue of the flue gas dilution module. The flue gas is stabilized by the conical tube, the constant-pressure flue gas flow flows towards the siphon port under the siphon action, the diluting gas with preset flow flows towards the siphon port through the diluting gas inlet, the diluting gas and the diluting gas are mixed and then discharged from the diluting gas outlet, the constant-pressure flue gas flow is favorable for forming the diluting sample gas with stable concentration, and the low reliability of the monitoring result of the flue gas caused by unstable dilution proportion is avoided. In addition, the dilution ratio can be adjusted by adjusting the flow rate of the dilution gas.
Therefore, the flue gas dilution module provided by the utility model has the advantages of high reliability and convenient and adjustable dilution ratio.
In some embodiments, the flue gas dilution module further comprises a precision filter provided at the flue gas inlet for filtration of the flue gas.
In some embodiments, the flue gas dilution module further comprises a dilution gas pipe in communication with the dilution gas inlet for introducing dilution gas and a dilution gas valve provided on the dilution gas pipe for controlling the flow rate of the dilution gas.
In some embodiments, the line between the dilution gas inlet and the siphon port is collinear with the line between the siphon port and the dilution sample gas outlet.
In another aspect, an embodiment of the present utility model provides a flue gas treatment device, including: the sampling gun comprises a sampling gun body, a filtering cavity, a filter and a dilution module, wherein a sampling end of the sampling gun body stretches into a flue to sample smoke, a gas discharging end of the sampling gun body is communicated with the filtering cavity, the filter is positioned in the filtering cavity and used for filtering the sampled smoke, and a smoke inlet of the dilution module is communicated with a filtered gas outlet of the filter.
In some embodiments, the filter is cylindrical, a filter screen is arranged on the peripheral wall of the filter, the end part of the filter is provided with the filtered gas outlet, and the sampled flue gas passes through the filter screen from outside to inside for filtering.
In some embodiments, the flue gas treatment device further comprises a lance tube, an air outlet of the lance tube is in communication with the filtered air outlet, and a blowback valve is provided on the lance tube.
In another aspect, an embodiment of the present utility model provides a device for monitoring mercury concentration in flue gas, including: a flue gas treatment device; the analysis module comprises a conversion unit and a mercury analyzer, wherein a dilution sample gas outlet of the dilution module is communicated with a dilution sample gas inlet of the conversion unit, the conversion unit comprises an elemental mercury pipeline and a divalent mercury pipeline which are connected in parallel, the elemental mercury pipeline and the gas outlet end of the divalent mercury pipeline are both communicated with a detection inlet of the mercury analyzer, a divalent mercury remover is arranged on the elemental mercury pipeline, a conversion furnace is arranged on the divalent mercury pipeline, and the conversion furnace is used for converting divalent mercury into elemental mercury.
In some embodiments, the device for monitoring mercury concentration in flue gas further comprises a jet unit, wherein the jet unit is communicated with the filtered gas outlet and is positioned at the downstream of the dilution module, and the jet unit samples the flue gas by utilizing an injection principle; the jet unit comprises a jet gas inlet, a jet gas valve arranged at the jet gas inlet, a sample gas injection port and an excessive flue gas outlet, wherein the sample gas injection port is communicated with each of the filtered gas outlet and the jet gas inlet, and the excessive flue gas outlet is communicated with the sample gas injection port and is used for discharging excessive flue gas.
In some embodiments, the device for monitoring the mercury concentration in the flue gas further comprises a constant temperature cabinet and a heating block, wherein the flue gas treatment device is positioned in the constant temperature cabinet, and the heating block is arranged on the outer side or the inner side of the constant temperature cabinet and used for heating so as to maintain the temperature in the constant temperature cabinet.
Drawings
Fig. 1 is a schematic structural diagram of a flue gas treatment device according to an embodiment of the present utility model.
Fig. 2 is a schematic structural diagram of a device for monitoring mercury concentration in flue gas according to an embodiment of the present utility model.
Reference numerals:
the device comprises a sampling gun 1, a filter cavity 2, a filter 3, a filtered gas outlet 31, an air passage 32, a dilution module 4, a diluted sample gas outlet 41, a precision filter 42, a conical tube 43, a siphon port 44, a dilution air pipe 45, a dilution air valve 46, a conversion unit 5, a diluted sample gas inlet 51, a bivalent mercury remover 52, a conversion furnace 53, a mercury analyzer 6, a chimney 7, a blowing pipe 8, a blowback valve 81, a jet unit 9, a jet air valve 91, a sample gas injection port 92, an excess flue gas outlet 93, a constant-temperature cabinet 101, a heating block 102, a bracket 103, an air compressor 104 and a gas purifier 105.
Detailed Description
Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
The following describes a flue gas dilution module, a flue gas treatment device and a device for monitoring mercury concentration in flue gas according to an embodiment of the present utility model according to fig. 1-2.
The flue gas dilution module provided by the embodiment of the utility model comprises: the flue is provided with a smoke inlet, a dilution gas inlet and a dilution sample gas outlet 41, the conical tube 43 is arranged in the flue, the conical tube 43 is provided with an air inlet and an air outlet, the air inlet is communicated with the smoke inlet of the flue, the cross section of the conical tube 43 is gradually reduced from the air inlet to the air outlet, that is, the cross section area of the air inlet of the conical tube 43 is larger than the cross section area of the air outlet. The siphon port 44 is located in the flue and downstream of the conical tube 43, the dilution gas inlet is communicated with the siphon port 44 and the dilution sample gas outlet 41 is located downstream of the siphon port 44, the dilution gas inlet is used for introducing dilution gas, the dilution gas and the flue gas are mixed into dilution sample gas through the siphon port 44, and the dilution sample gas outlet 41 is used for discharging the dilution sample gas.
The flue gas enters the flue from the flue gas inlet, then enters the conical tube 43 through the air inlet and flows towards the air outlet of the conical tube 34, the conical tube 43 is used for stabilizing the flue gas flow, the air outlet of the conical tube 43 sprays the flue gas flow with constant pressure, the dilution gas is sprayed towards the siphon port 44 through the dilution gas inlet, under the siphon effect, the flue gas flows towards the siphon port 44 and is uniformly mixed with the dilution gas to form dilution sample gas, and the dilution sample gas is discharged from the dilution sample gas outlet 41 to the flue gas dilution module.
The flue gas dilution module provided by the embodiment of the utility model dilutes the flue gas by adopting a siphon principle, and the diluted gas and the flue gas are mixed into diluted sample gas through a siphon port in a flue of the flue gas dilution module. The flue gas is stabilized by the conical tube, the constant-pressure flue gas flow flows towards the siphon port under the siphon action, the diluting gas with preset flow flows towards the siphon port through the diluting gas inlet, the diluting gas and the diluting gas are mixed and then discharged from the diluting gas outlet, the constant-pressure flue gas flow is favorable for forming the diluting sample gas with stable concentration, and the low reliability of the monitoring result of the flue gas caused by unstable dilution proportion is avoided. In addition, the dilution ratio can be adjusted by adjusting the flow rate of the dilution gas.
Therefore, the flue gas dilution module provided by the utility model has the advantages of high reliability and convenient and adjustable dilution ratio.
In some embodiments, the flue gas dilution module further includes a precision filter 42, where the precision filter 42 is disposed at the flue inlet of the flue for filtering the flue gas, and filters the particulate matter in the flue gas to avoid the particulate matter from blocking the conical tube 43.
In some embodiments, as shown in fig. 1, the flue gas dilution module further includes a dilution air pipe 45 and a dilution air valve 46, the dilution air pipe 45 is communicated with the dilution air inlet of the flue for introducing dilution air, the dilution air valve 46 is arranged on the dilution air pipe 45 for controlling the flow rate of the dilution air, and the flow rate of the dilution air entering the dilution air inlet is regulated by the dilution air valve 45, so that the dilution ratio of the flue gas can be conveniently and accurately regulated.
In some embodiments, as shown in FIG. 1, the line between the diluent gas inlet and the siphon port 44 is collinear with the line between the siphon port 44 and the diluent sample gas outlet 41.
The following describes a flue gas treatment device according to an embodiment of the present utility model according to fig. 1, where the flue gas treatment device includes: a sampling gun 1, a filter chamber 2, a filter 3 and a dilution module 4, the dilution module 4 being a flue gas dilution module according to any of the embodiments described above.
The sampling end of the sampling gun 1 stretches into a chimney 7 to be sampled for sampling smoke, the air discharging end of the sampling gun 1 is communicated with the filter cavity 2, and the filter 3 is positioned in the filter cavity 2 for filtering the sampled smoke taken by the sampling gun 1 and filtering impurities in the sampled smoke.
The dilution module 4 is used for diluting the filtered sampling smoke according to a preset proportion. The smoke inlet of the dilution module 4 communicates with the filtered gas outlet 31 of the filter 3. The filtered sampling smoke enters the dilution module 4 from the sample gas inlet of the dilution module 4, and becomes diluted sample gas after being diluted by the dilution module 4 according to a preset proportion.
In some embodiments, as shown in fig. 1, a filter 3 is located in the filter cavity 2. The filter 3 is in a tube shape, a filter screen is arranged on the peripheral wall of the filter 3, a filtered air outlet 31 is arranged at the end part of the filter 3, and the sampled flue gas passes through the filter screen of the filter 3 from outside to inside for filtering. The sampling rifle 1 is with sampling flue gas input filter chamber 2 in, and the flue gas in the filter chamber 2 filters from outside-in filter screen that passes filter 3, and the sampling flue gas after the filtration is discharged filter 3 through filtering gas export 31, gets into the air flue 32 that the filter chamber 2 is outer to be limited, and the air inlet and the filtering gas export 31 intercommunication of air flue 32, the sample gas import and the air flue 32 intercommunication of diluting module 4.
In some embodiments, the flue gas treatment device further comprises a lance tube 8 and a blowback valve 81, wherein the gas outlet of the lance tube 8 is in communication with the filtered gas outlet 31, and the blowback valve 81 is provided on the lance tube 8 for opening or closing the lance tube 8. When it is necessary to perform soot blowing, the soot blowing pipe 8 is opened by controlling the back-blowing valve 81, and the soot blowing pipe 8 blows purge gas into the filter 3 through the filtered gas outlet 31 to purge the filter 3.
Further, in some embodiments, the flue gas treatment device further comprises an air compressor 104 and a gas purifier 105, the outlet of the air compressor 104 being in communication with the dilution gas inlet of the dilution module 4, the gas purifier 105 being provided between the air compressor 104 and the dilution gas inlet of the dilution module 4 for purification of the gas. In the embodiment shown in fig. 2, the outlet of the air compressor 104 communicates with the dilution air duct 45 of the dilution module 4, providing air as dilution air.
As shown in fig. 1, the outlet of the air compressor 104 is also in communication with the lance tube 8, i.e. the air compressor 10 is also used to provide the purge gas required for soot blowing.
The following describes a device for monitoring mercury concentration in flue gas according to an embodiment of the present utility model according to fig. 2, where the device for monitoring mercury concentration in flue gas includes a flue gas treatment device and an analysis module, and the flue gas treatment device is a flue gas treatment device in any one of the foregoing embodiments. The analysis module is used for analyzing and monitoring the mercury concentration in the diluted sample gas, and comprises a conversion unit 5 and a mercury analyzer 6.
The diluted sample gas outlet 41 of the dilution module 4 communicates with the diluted sample gas inlet 51 of the conversion unit 5. The diluted sample gas enters the conversion unit 5 through the diluted sample gas outlet 41 and the diluted sample gas inlet 51 of the conversion unit 5 for conversion.
The conversion unit 5 comprises an elemental mercury pipeline and a bivalent mercury pipeline which are connected in parallel, and the air inlet ends of the elemental mercury pipeline and the bivalent mercury pipeline are communicated with the dilution sample air inlet 51. The outlet ends of the elemental mercury pipeline and the bivalent mercury pipeline are communicated with the detection inlet of the mercury analyzer 6, a bivalent mercury remover 52 is arranged on the elemental mercury pipeline, the bivalent mercury remover 52 is used for removing bivalent mercury in diluted sample gas, a reformer 53 is arranged on the bivalent mercury pipeline, and the reformer 53 is used for converting bivalent mercury into elemental mercury. The diluted sample gas can enter the elemental mercury pipeline through the diluted sample gas inlet 51, divalent mercury is removed by the divalent mercury remover 52 and then is sent to the mercury analyzer 6, and the mercury analyzer 6 measures the zero-valent mercury concentration. The diluted sample gas can also enter a divalent mercury pipeline through a diluted sample gas inlet 51, divalent mercury is converted into elemental mercury through a converter 53 and then is sent to a mercury analyzer 6, and the total mercury concentration is measured by the mercury analyzer 6.
In some embodiments, the device for monitoring the mercury concentration in the flue gas further comprises a jet unit 9, wherein the jet unit 9 is communicated with the filtered gas outlet 31 and is positioned downstream of the dilution module 4, and the jet unit 9 samples the flue gas by utilizing the injection principle. Compared with the extraction type sample, the jet flow sampling is more stable in pressure and stronger in capability of resisting the interference of the pressure fluctuation of the emission source.
Specifically, as shown in fig. 2, the jet unit 9 includes a jet gas inlet, a jet gas valve 91 provided at the jet gas inlet, a sample gas injection port 92, and an excess flue gas outlet 93, the sample gas injection port 92 being in communication with each of the filtered gas outlet 31 and the jet gas inlet, the excess flue gas outlet 93 being in communication with the sample gas injection port 92 for discharging excess flue gas. Jet gas enters the jet unit 9 through a jet gas inlet, is discharged from a redundant flue gas outlet 93 through a sample gas injection port 92, and is discharged from the redundant flue gas outlet 93 after passing through the sample gas injection port 92 by utilizing the injection principle.
In the embodiment shown in fig. 2, the jet gas inlet of the jet unit 9 communicates with the gas channel 32 at a location downstream of the sample gas inlet of the dilution module 4.
In some embodiments, to improve the accuracy of the test, the device for monitoring the mercury concentration in the flue gas further comprises a constant temperature cabinet 101 and a heating block 102, wherein the flue gas treatment module is located in the constant temperature cabinet 101, and the heating block 102 is provided on the outer side or the inner side of the constant temperature cabinet 101 for heating to maintain the temperature in the constant temperature cabinet 101.
For ease of installation, in some embodiments, as shown in fig. 1, the mercury concentration monitoring device in flue gas comprises a support 103, the support 103 being disposed adjacent to the stack 7, the thermostat housing 101 being mounted on the support 103, the conversion unit 5 being mounted on the support 103 below the thermostat housing 101.
In the related art, the exhaust stack and the sample analysis chamber are connected by a long insulating pipeline (typically more than 30 meters). The inventor finds that if the pipeline is not well insulated, bivalent mercury in the flue gas is easily adsorbed on the pipeline, so that the test result is distorted. In some embodiments of the present utility model, the length of the flue gas flowing path between the sampling gun 1 and the conversion unit 5 is less than 30 meters, that is, the flowing path is shorter in the process that the flue gas enters the conversion unit 5 after being filtered and diluted after being sampled, so that the sample gas can be prevented from being adsorbed on the pipeline during the longer flowing process, and the test result is prevented from being distorted. The device for monitoring the mercury concentration in the flue gas provided by the embodiment of the utility model can directly convert bivalent mercury into zero-valent mercury at a site discharge chimney, so that the measurement accuracy is ensured.
In some preferred embodiments, the length of the flue gas flow path between the sampling gun 1 to the conversion unit 5 is less than 10 meters. The flow path of the flue gas is as short as possible, which is helpful for reducing the adhesion of bivalent mercury in the flue gas in the flow process and improving the accuracy of the measurement result.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.
Claims (10)
1. A flue gas dilution module, comprising: the flue is provided with a smoke inlet, a dilution gas inlet and a dilution sample gas outlet, the conical tube is arranged in the flue and is provided with an air inlet and an air outlet, the air inlet is communicated with the smoke inlet, the cross section of the conical tube is gradually reduced from the air inlet to the air outlet, the siphon opening is positioned in the flue and is positioned at the downstream of the conical tube, the dilution gas inlet is communicated with the siphon opening, the dilution sample gas outlet is positioned at the downstream of the siphon opening, the dilution gas inlet is used for introducing dilution gas, the dilution gas and the smoke pass through the siphon opening to be mixed into dilution sample gas, and the dilution sample gas outlet is used for discharging the dilution sample gas.
2. The flue gas dilution module according to claim 1, further comprising a precision filter provided at the flue gas inlet for filtration of flue gas.
3. The flue gas dilution module according to claim 1, further comprising a dilution gas pipe in communication with the dilution gas inlet for introducing a dilution gas and a dilution gas valve provided on the dilution gas pipe for controlling a flow rate of the dilution gas.
4. The flue gas dilution module according to claim 1, wherein a line between the dilution gas inlet and the siphon port is co-linear with a line between the siphon port and the dilution sample gas outlet.
5. A flue gas treatment device, comprising: the smoke dilution module comprises a sampling gun, a filter cavity, a filter and a dilution module, wherein the dilution module is a smoke dilution module according to any one of claims 1-4, a sampling end of the sampling gun stretches into a flue to sample smoke, a gas discharging end of the sampling gun is communicated with the filter cavity, the filter is positioned in the filter cavity and is used for filtering sampled smoke, and a smoke inlet of the dilution module is communicated with a filtered gas outlet of the filter.
6. The flue gas treatment device according to claim 5, wherein the filter is cylindrical, a filter screen is arranged on the peripheral wall of the filter, the end part of the filter is provided with the filtered gas outlet, and the sampled flue gas passes through the filter screen from outside to inside for filtering.
7. The flue gas treatment device according to claim 5, further comprising a lance tube, an air outlet of the lance tube being in communication with the filtered air outlet, and a blowback valve provided on the lance tube.
8. A device for monitoring mercury concentration in flue gas, comprising:
a flue gas treatment device according to any one of claims 5 to 7;
the analysis module comprises a conversion unit and a mercury analyzer, wherein a dilution sample gas outlet of the dilution module is communicated with a dilution sample gas inlet of the conversion unit, the conversion unit comprises an elemental mercury pipeline and a divalent mercury pipeline which are connected in parallel, the elemental mercury pipeline and the gas outlet end of the divalent mercury pipeline are both communicated with a detection inlet of the mercury analyzer, a divalent mercury remover is arranged on the elemental mercury pipeline, a conversion furnace is arranged on the divalent mercury pipeline, and the conversion furnace is used for converting divalent mercury into elemental mercury.
9. The device for monitoring the mercury concentration in the flue gas according to claim 8, further comprising a jet unit, wherein the jet unit is communicated with the filtered gas outlet and is positioned at the downstream of the dilution module, and the jet unit samples the flue gas by utilizing an injection principle;
the jet unit comprises a jet gas inlet, a jet gas valve arranged at the jet gas inlet, a sample gas injection port and an excessive flue gas outlet, wherein the sample gas injection port is communicated with each of the filtered gas outlet and the jet gas inlet, and the excessive flue gas outlet is communicated with the sample gas injection port and is used for discharging excessive flue gas.
10. The device for monitoring the mercury concentration in the flue gas according to claim 8, further comprising a constant temperature cabinet and a heating block, wherein the flue gas treatment device is positioned in the constant temperature cabinet, and the heating block is arranged on the outer side or the inner side of the constant temperature cabinet for heating so as to maintain the temperature in the constant temperature cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321281127.6U CN220019122U (en) | 2023-05-24 | 2023-05-24 | Flue gas dilution module, flue gas treatment device and mercury concentration monitoring device in flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321281127.6U CN220019122U (en) | 2023-05-24 | 2023-05-24 | Flue gas dilution module, flue gas treatment device and mercury concentration monitoring device in flue gas |
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| Publication Number | Publication Date |
|---|---|
| CN220019122U true CN220019122U (en) | 2023-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321281127.6U Active CN220019122U (en) | 2023-05-24 | 2023-05-24 | Flue gas dilution module, flue gas treatment device and mercury concentration monitoring device in flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220019122U (en) |
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2023
- 2023-05-24 CN CN202321281127.6U patent/CN220019122U/en active Active
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