CN115902123A - Flue gas emission's on-line monitoring system behind SOx/NOx control - Google Patents
Flue gas emission's on-line monitoring system behind SOx/NOx control Download PDFInfo
- Publication number
- CN115902123A CN115902123A CN202211722696.XA CN202211722696A CN115902123A CN 115902123 A CN115902123 A CN 115902123A CN 202211722696 A CN202211722696 A CN 202211722696A CN 115902123 A CN115902123 A CN 115902123A
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- Prior art keywords
- flue gas
- pipe
- jar
- monitoring system
- smoke
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 239000003546 flue gas Substances 0.000 title claims abstract description 75
- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 239000000779 smoke Substances 0.000 claims abstract description 55
- 238000010438 heat treatment Methods 0.000 claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 37
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 21
- 230000023556 desulfurization Effects 0.000 claims abstract description 21
- 239000007789 gas Substances 0.000 claims description 17
- 238000007790 scraping Methods 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 10
- 241000208125 Nicotiana Species 0.000 claims description 5
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 description 12
- 239000002585 base Substances 0.000 description 9
- 239000002253 acid Substances 0.000 description 6
- 239000003513 alkali Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treating Waste Gases (AREA)
Abstract
The invention discloses an online monitoring system for flue gas emission after desulfurization and denitrification, which belongs to the technical field of monitoring, and adopts the technical scheme that the online monitoring system comprises a filter tank and a heating tank, wherein the top of the filter tank is communicated with a smoke delivery pipe, a smoke delivery pipe is communicated between the filter tank and the heating tank, the surface of the smoke delivery pipe is provided with a heater positioned on the left side of the heating tank, the right side of the heating tank is communicated with an air inlet pipe, the right side of the air inlet pipe is communicated with a detection tank, and a first electromagnetic valve is communicated between the heating tank and the detection tank.
Description
Technical Field
The invention relates to the technical field of monitoring, in particular to an online monitoring system for flue gas emission after desulfurization and denitrification.
Background
Coal is a main combustion object of thermal power generation, SO that generated pollutants mainly comprise dust, CO2, SO2, NOX and the like, and therefore, the combustion of the coal is the largest pollution source causing ecological environment damage. At present, the flue gas after combustion in a thermal power station can be discharged into the atmosphere after the flue gas reaches the national emission standard after being treated by processes such as desulfurization and denitrification.
A fixed flue gas measuring device is arranged on a chimney or a flue so as to conveniently detect the flue gas after denitration and desulfurization, whether the flue gas meets the emission standard or not, part of the detecting devices detect when the flue gas is discharged, the detection result is fed back, and then a flue gas treatment system is adjusted, so that the flue gas which does not meet the emission standard is discharged into the atmosphere; in addition, the flue gas needs to be heated in the process of flue gas emission, and dust contained in the heated flue gas is very easy to adhere to the pipe wall and is difficult to clean, so that the technical personnel in the field provide an online monitoring system for flue gas emission after desulfurization and denitrification to solve the problems in the background art.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide an online monitoring system for flue gas emission after desulfurization and denitrification, which has the advantages of perfecting the detection function of purified flue gas, increasing the treatment effect of the flue gas and preventing the flue gas which does not meet the detection standard from being directly emitted to the air environment polluted by air.
2. Technical scheme
In order to solve the problems, the invention adopts the following technical scheme: the utility model provides an online monitoring system of flue gas emission behind SOx/NOx control, includes gas filter and heating jar, the top intercommunication of gas filter has the smoke pipe of sending, the intercommunication has defeated tobacco pipe between gas filter and the heating jar, the surface of defeated tobacco pipe is provided with and is located the left heater of heating jar, the right side intercommunication of heating jar has the intake pipe, the right side intercommunication of intake pipe has the detection jar, the intercommunication has the solenoid valve No. one between heating jar and the detection jar, the inner wall sliding connection that detects the jar has the scraping ring, the right side intercommunication that detects the jar has the blast pipe, the top intercommunication of blast pipe has the smoke return pipe, one side intercommunication that the detection jar was kept away from to the blast pipe has the solenoid valve No. two, no. two solenoid valves are located the right side of smoke return pipe, the intercommunication has the solenoid valve No. three between smoke return pipe and the pipe of discharging fume.
Furthermore, the inner wall of the filter tank is provided with two acid-base filter screens, and the diameter of the meshes of the acid-base filter screens is smaller than that of the meshes of the acid-base filter screens on the left side.
Further, temperature sensor is installed in the embedding of the inner wall top of heating jar, temperature sensor's output electric connection has the controller, it has the cover pipe to communicate between heating jar and the defeated tobacco pipe, the inner wall of heating jar is provided with the flue gas that is located the cover pipe right side and subtracts the class net.
Further, the inside of flue gas flow reducing net is provided with and is used for filtering gaseous and corrosion-resistant intermediate layer, the left side diameter of cover pipe is less than the right side diameter.
Further, detect the equal fixedly connected with protruding shell in the front and the back of jar, the inner wall right side of protruding shell is provided with multisection formula electric putter, the spout has been seted up to the inner wall of detection jar, multisection formula electric putter's output shaft run through the spout and with scrape ring fixed connection.
Furthermore, the inner wall of the detection tank is provided with two limiting grooves which are communicated with the sliding groove, and the widths of the limiting grooves and the sliding groove are matched with the width of the push block.
Further, the top of the inner wall of the detection tank is provided with a smoke measuring device which is not in contact with the scraping ring.
Further, the bottom of the detection tank is communicated with a drain pipe, the drain pipe is inclined with the communication position of the detection tank, and the diameter of the inner edge of the top of the drain pipe is larger than that of the inner edge of the bottom of the drain pipe.
Furthermore, the output end of the flue gas measuring device is electrically connected with the controller, and the output end of the controller is respectively electrically connected with the heater, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the input end of the multi-section electric push rod.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) According to the scheme, the filter gas tank is arranged, the flue gas subjected to denitration and desulfurization is conveyed to the interior of the filter gas tank through the smoke conveying pipe, and acid and alkali contained in the flue gas are filtered by the two acid and alkali filter screens in the filter gas tank, so that the flue gas is subjected to primary purification treatment;
(2) Through the arrangement, the flue gas in the flue gas conveying pipe is heated by the heater, then the flow velocity of the flue gas entering the heating tank is controlled by the flue gas flow reducing net so as to ensure that the flue gas is sufficiently heated, and the temperature sensor detects whether the flue gas reaches the specified temperature so as to ensure that the flue gas entering the heating tank is dried;
(3) By arranging the cover pipe, when the flue gas heated by the heater enters the heating tank, the circulation of the flue gas can be improved and the heating effect of the heater on the flue gas can be improved through the cover pipe;
(4) The smoke measuring device is arranged to detect smoke, when the smoke measuring device reaches a discharge standard, the second electromagnetic valve is opened through the controller to discharge the smoke, if the smoke does not reach the standard, the second electromagnetic valve is closed, the third electromagnetic valve is opened through the controller, so that air which does not reach the standard flows back to the inside of the denitration and desulfurization device through the smoke return pipe, and is purified again to reach the discharge standard, and the quality of polluted air is avoided;
(5) Through setting up the scraping ring, the back is accomplished in the fume emission, because of the flue gas of heater heating, probably leads to dry dust adhesion in the inside that detects the jar, can pass through controller cooperation multisection formula electric putter this moment to clear up the dust that detects jar inside by the scraping ring, so that remove dust to the inside that detects the jar.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a cross-sectional view of a canister of the present invention;
FIG. 3 is a cross-sectional view of a heating tank of the present invention;
FIG. 4 is a side cross-sectional view of a test canister of the present invention;
FIG. 5 is a top sectional view of the inspection tank of the present invention;
FIG. 6 is a system flow diagram of the present invention.
The reference numbers in the figures illustrate:
1. a gas filter tank; 2. a smoke delivery pipe; 3. a smoke conveying pipe; 4. an exhaust pipe; 5. a heater; 6. a heating tank; 7. a first electromagnetic valve; 8. detecting the tank; 9. a flue gas measuring device; 10. a second electromagnetic valve; 11. a third electromagnetic valve; 12. a smoke returning pipe; 13. a flue gas flow reducing net; 14. a temperature sensor; 15. scraping rings; 16. a multi-section electric push rod; 17. a push block; 18. an air inlet pipe; 19. acid-base filter screen.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
Referring to fig. 1-6, in an embodiment of the present invention, an online monitoring system for flue gas emission after desulfurization and denitrification includes a filter tank 1 and a heating tank 6, a smoke delivery pipe 2 is communicated with the top of the filter tank 1, a smoke delivery pipe 3 is communicated between the filter tank 1 and the heating tank 6, a heater 5 located on the left side of the heating tank 6 is disposed on the surface of the smoke delivery pipe 3, an air inlet pipe 18 is communicated with the right side of the heating tank 6, a detection tank 8 is communicated with the right side of the air inlet pipe 18, a first electromagnetic valve 7 is communicated between the heating tank 6 and the detection tank 8, a scraping ring 15 is slidably connected to the inner wall of the detection tank 8, an exhaust pipe 4 is communicated with the right side of the detection tank 8, a smoke return pipe 12 is communicated with the top of the exhaust pipe 4, a second electromagnetic valve 10 is communicated with one side of the exhaust pipe 4 away from the detection tank 8, the second electromagnetic valve 10 is located on the right side of the smoke return pipe 12, and a third electromagnetic valve 11 is communicated between the smoke return pipe 12 and the exhaust pipe 4.
Referring to fig. 2, the inner wall of the gas filtering tank 1 is provided with two acid-base filter screens 19, the mesh diameter of the right acid-base filter screen 19 is smaller than that of the left acid-base filter screen 19, the flue gas after denitration and desulfurization is conveyed to the inside of the gas filtering tank 1 through the smoke conveying pipe 2, and the acid and base contained in the flue gas are filtered by the two acid-base filter screens 19 inside the gas filtering tank 1, so that the flue gas is subjected to primary purification treatment.
Referring to fig. 3, a temperature sensor 14 is installed at the top of the inner wall of the heating tank 6 in an embedded manner, the output end of the temperature sensor 14 is electrically connected with a controller, a cover pipe is communicated between the heating tank 6 and the smoke conveying pipe 3, a smoke flow reducing net 13 located on the right side of the cover pipe is arranged on the inner wall of the heating tank 6, smoke filtered by the gas filtering tank 1 is conveyed to the inside of the heating tank 6 through the smoke conveying pipe 3, the smoke inside the smoke conveying pipe 3 is heated by a heater 5, then the flow rate of the smoke entering the heating tank 6 is controlled by the smoke flow reducing net 13, so that the smoke is sufficiently heated, whether the smoke reaches a specified temperature is detected by the temperature sensor 14, and the smoke entering the heating tank 6 is ensured to be dry.
Referring to fig. 3, the flue gas flow reducing net 13 is provided with an interlayer for filtering gas and resisting corrosion inside, the diameter of the left side of the cover tube is smaller than that of the right side of the cover tube, and when the flue gas heated by the heater 5 enters the heating tank 6, the circulation of the flue gas can be increased by the cover tube, and the heating effect of the heater 5 on the flue gas is increased.
Refer to fig. 4, fig. 5, detect jar 8 the front and the equal fixedly connected with protruding shell in the back, the inner wall right side of protruding shell is provided with multisection formula electric putter 16, the spout has been seted up to the inner wall of detection jar 8, multisection formula electric putter 16's output shaft run through the spout and with scrape ring 15 fixed connection, multisection formula electric putter 16 during operation, accessible spout promotes scrapes ring 15 and takes place the displacement about the inside that detects jar 8, clear up the dust of adhesion in detection jar 8 inner wall with this.
Referring to fig. 4 and 5, the inner wall of the detection tank 8 is provided with two limiting grooves communicated with the sliding groove, the widths of the limiting grooves and the sliding groove are matched with the width of the push block 17, and when the scraping ring 15 slides to clean up the dust on the inner wall through the multi-section electric push rod 16 in the detection tank 8, the limiting grooves communicated with the sliding groove can limit the displacement scraping ring 15.
Referring to fig. 4, the top of the inner wall of the detection tank 8 is provided with a flue gas detection device 9, the flue gas detection device 9 is not in contact with the scraping ring 15, the flue gas detection device 9 can detect the acid content and alkali content in the treated flue gas, and the flue gas can be directly discharged or not, and the cleaning effect of the scraping ring 15 on dust can not be influenced.
Referring to fig. 4, the bottom intercommunication that detects jar 8 has the blow off pipe, and the blow off pipe is the slope form with detection jar 8 intercommunication department, and the top inner edge diameter of blow off pipe is greater than the inner edge diameter of blow off pipe bottom, when scraping ring 15 to the right side displacement to the dust that can be convenient for through the 15 clearance of scraping ring of the blow off pipe of top slope form gets into to the inside of blow off pipe, is convenient for clear up the dust.
Referring to fig. 6, the output end of the flue gas measuring device 9 is electrically connected to the controller, the output end of the controller is electrically connected to the heater 5, the first electromagnetic valve 7, the second electromagnetic valve 10, the third electromagnetic valve 11, and the input end of the multi-section electric push rod 16, and the heater 5, the first electromagnetic valve 7, the second electromagnetic valve 10, the third electromagnetic valve 11, and the multi-section electric push rod 16 can be operated through the controller.
The working principle of the invention is as follows: the flue gas purified by the denitration and desulfurization device (the denitration and desulfurization device is a common device in the prior art) enters the interior of the gas filtering tank 1 through the smoke conveying pipe 2, acid and alkali contained in the flue gas are filtered by two acid and alkali filtering nets 19 in the gas filtering tank 1, so that the flue gas is subjected to primary purification treatment, the flue gas in the smoke conveying pipe 3 is heated by the heater 5, the flow rate of the flue gas entering the heating tank 6 is controlled by the flue gas flow reducing net 13 to ensure that the flue gas is sufficiently heated, the temperature sensor 14 detects whether the flue gas reaches a specified temperature or not to ensure that the flue gas entering the heating tank 6 is dried, the controller opens the first electromagnetic valve 7 to ensure that the flue gas enters the detection tank 8 through the air inlet pipe 18, the smoke measuring device 9 is used for detecting smoke, when the smoke reaches the emission standard, the second electromagnetic valve 10 is opened through the controller to discharge the smoke, if the smoke does not reach the standard, the second electromagnetic valve 10 is closed, the third electromagnetic valve 11 is opened through the controller, air which does not reach the standard flows back to the inside of the denitration and desulfurization device through the smoke returning pipe 12, the smoke is purified again to reach the emission standard, air quality pollution is avoided, after the smoke is discharged, dry dust is possibly adhered to the inside of the detection tank 8 due to the smoke heated by the heater 5, at the moment, the controller can be matched with the multi-section electric push rod 16, and the dust inside the detection tank 8 is cleaned through the scraping ring 15, so that the inside of the detection tank 8 can be conveniently dedusted.
It should be noted that, in the above description, the heater 5, the first electromagnetic valve 7, the second electromagnetic valve 10, the third electromagnetic valve 11, the controller, the multi-section electric push rod 16, and the like are all mature devices applied in the prior art, and the specific model can be selected according to actual needs, and meanwhile, the power supply of the heater 5, the first electromagnetic valve 7, the second electromagnetic valve 10, the third electromagnetic valve 11, the controller, and the multi-section electric push rod 16 can be a built-in power supply, or a commercial power supply, and the specific power supply mode is selected according to circumstances, and is not described herein.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by the equivalent or modified embodiments and the modified concepts of the present invention.
Claims (9)
1. The utility model provides an online monitoring system of flue gas emission behind SOx/NOx control, includes gas filter jar (1) and heating tank (6), the top intercommunication of gas filter jar (1) has send tobacco pipe (2), its characterized in that: the utility model discloses a smoke alarm device, including filter tank (1), heating jar (6), intake pipe (8), heating jar (6), inner wall sliding connection have scraping ring (15), the right side intercommunication that detects jar (8) has blast pipe (4), the top intercommunication of blast pipe (4) has smoke return pipe (12), one side intercommunication that detection jar (8) was kept away from in blast pipe (4) has No. two solenoid valves (10), no. two solenoid valves (10) are located smoke return pipe (12), the intercommunication has No. three solenoid valves (11) between smoke return pipe (12) and blast pipe (4), the surface of smoke return pipe (3) is provided with and is located heating jar (6) left heater (5), the right side intercommunication of heating jar (6) has intake pipe (18), the right side intercommunication of intake pipe (18) has detection jar (8), the top intercommunication that detects jar (8) has No. two solenoid valves (12) is kept away from in blast pipe (4).
2. The on-line monitoring system for flue gas emission after desulfurization and denitrification according to claim 1, characterized in that: the inner wall of filter gas jar (1) is provided with quantity and is two acid-base filter screen (19), and the right side the mesh diameter of acid-base filter screen (19) is less than the left side the mesh diameter of acid-base filter screen (19).
3. The on-line monitoring system for flue gas emission after desulfurization and denitrification according to claim 1, characterized in that: temperature sensor (14) are installed in the embedding of the inner wall top of heating jar (6), the output electric connection of temperature sensor (14) has the controller, the intercommunication has the cover pipe between heating jar (6) and defeated tobacco pipe (3), the inner wall of heating jar (6) is provided with and is located the flue gas of cover pipe right side and subtracts class net (13).
4. The on-line monitoring system for flue gas emission after desulfurization and denitrification according to claim 3, characterized in that: the inside of flue gas flow reducing net (13) is provided with and is used for filtering gaseous and corrosion-resistant intermediate layer, the left side diameter of cover pipe is less than the right side diameter.
5. The on-line monitoring system for flue gas emission after desulfurization and denitrification according to claim 1, characterized in that: the front and the back of the detection tank (8) are fixedly connected with protruding shells, the right sides of the inner walls of the protruding shells are provided with multi-section electric push rods (16), the inner walls of the detection tank (8) are provided with sliding grooves, and output shafts of the multi-section electric push rods (16) penetrate through the sliding grooves and are fixedly connected with scraping rings (15).
6. The on-line monitoring system for flue gas emission after desulfurization and denitrification according to claim 5, characterized in that: the inner wall of the detection tank (8) is provided with two limiting grooves communicated with the sliding grooves, and the widths of the limiting grooves and the sliding grooves are matched with the width of the push block (17).
7. The on-line monitoring system for flue gas emission after desulfurization and denitrification according to claim 6, characterized in that: the top of the inner wall of the detection tank (8) is provided with a smoke measuring device (9), and the smoke measuring device (9) is not in contact with the scraping ring (15).
8. The on-line monitoring system for flue gas emission after desulfurization and denitrification according to claim 7, characterized in that: the bottom intercommunication of detecting jar (8) has the blow off pipe, the blow off pipe is the slope form with detecting jar (8) intercommunication department, and the top inner edge diameter of blow off pipe is greater than the inner edge diameter of blow off pipe bottom.
9. The on-line monitoring system for flue gas emission after desulfurization and denitrification according to claim 7, characterized in that: the output end of the smoke measuring device (9) is electrically connected with the controller, and the output end of the controller is electrically connected with the input ends of the heater (5), the first electromagnetic valve (7), the second electromagnetic valve (10), the third electromagnetic valve (11) and the multi-section type electric push rod (16) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211722696.XA CN115902123A (en) | 2022-12-30 | 2022-12-30 | Flue gas emission's on-line monitoring system behind SOx/NOx control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211722696.XA CN115902123A (en) | 2022-12-30 | 2022-12-30 | Flue gas emission's on-line monitoring system behind SOx/NOx control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115902123A true CN115902123A (en) | 2023-04-04 |
Family
ID=86488298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211722696.XA Withdrawn CN115902123A (en) | 2022-12-30 | 2022-12-30 | Flue gas emission's on-line monitoring system behind SOx/NOx control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115902123A (en) |
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2022
- 2022-12-30 CN CN202211722696.XA patent/CN115902123A/en not_active Withdrawn
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Application publication date: 20230404 |
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