CN114624070A - Flue gas sampling probe device and back flushing method thereof - Google Patents
Flue gas sampling probe device and back flushing method thereof Download PDFInfo
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- CN114624070A CN114624070A CN202210232009.XA CN202210232009A CN114624070A CN 114624070 A CN114624070 A CN 114624070A CN 202210232009 A CN202210232009 A CN 202210232009A CN 114624070 A CN114624070 A CN 114624070A
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- 238000005070 sampling Methods 0.000 title claims abstract description 97
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 52
- 239000000523 sample Substances 0.000 title claims abstract description 26
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000003546 flue gas Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000000779 smoke Substances 0.000 claims abstract description 41
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000001914 filtration Methods 0.000 claims abstract description 23
- 238000007664 blowing Methods 0.000 claims description 37
- 238000009434 installation Methods 0.000 claims description 32
- 229910001220 stainless steel Inorganic materials 0.000 claims description 30
- 239000000919 ceramic Substances 0.000 claims description 21
- 239000010935 stainless steel Substances 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 14
- 239000003344 environmental pollutant Substances 0.000 claims description 12
- 231100000719 pollutant Toxicity 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 229910000856 hastalloy Inorganic materials 0.000 claims description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 2
- 235000011613 Pinus brutia Nutrition 0.000 claims description 2
- 241000018646 Pinus brutia Species 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 239000000428 dust Substances 0.000 abstract description 12
- 239000002912 waste gas Substances 0.000 abstract description 11
- 239000003921 oil Substances 0.000 abstract description 9
- 239000002245 particle Substances 0.000 abstract description 9
- 239000000295 fuel oil Substances 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 7
- 239000000571 coke Substances 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 150000002736 metal compounds Chemical class 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000126 substance Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
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Abstract
The invention discloses a smoke sampling probe device and a back flushing method thereof, and the smoke sampling probe device comprises a sampling pipe and a two-stage filtering structure connected to one end of the sampling pipe, wherein the two-stage filtering structure comprises a primary filter element, a secondary filter element, a primary filter element mounting base and a secondary filter element fixing base, one end of the primary filter element mounting base is connected with one end of the sampling pipe, the other end of the primary filter element mounting base is connected with the secondary filter element fixing base through a heating ring fixing base, the other end of the sampling pipe is provided with a smoke sampling port and a back flushing port, the direction of the smoke sampling port is opposite to the flow velocity direction of smoke, the back flushing port is arranged in a downward inclination manner when being installed, and the heating ring fixing base is provided with an inner back flushing joint port, an outer back flushing air inlet and a back flushing air outlet. The invention is used for the easy blockage of large particle coke shells, metal compounds, oil stains, small particle size dust and the like in the flue gas waste gas generated after heavy oil combustion and the high-temperature, high-humidity and high-corrosion sampling environment of the flue gas waste gas, and has the advantages of long maintenance period, long service life and high reliability.
Description
Technical Field
The invention belongs to the technical field of environment monitoring equipment, and particularly relates to a smoke sampling probe device and a back flushing method thereof.
Background
As the environmental protection concept is accepted by more and more people, the concept of sustainable development is also proposed by the nation, and relevant policy and regulation are provided, wherein the concept of sustainable development is also important for the smoke emission of ships using fuel oil as fuel. Flue gas that traditional sampling probe produced after heavy oil burning is like the easy jam such as big granule burnt shell in boats and ships flue gas waste gas, metallic compound, greasy dirt, small-particle size dust, and the high temperature of flue gas waste gas, high humidity, the high corrosive sampling environment, easily block up the concrete composition in the sampling and refer to the boats and ships waste gas composition detection report of fig. 6-8, the difficult several weeks of operating mode even several days just is easily blockked up, the plug not only has the viscidity big particulate matter more than 100um, but also has the metal small particulate matter between 5um ~ 100um, traditional filter core is hardly compromise the filtration to these particulate matters of different particle sizes, different physical properties. After the filter element is blocked, the whole sampling device needs to be detached for maintenance, and the sampling device can be corroded and needs to be replaced even after being used for several months.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the invention provides a smoke sampling probe device and a back flushing method thereof, which are mainly designed for smoke generated after heavy oil combustion, such as easily-blocked substances in ship smoke waste gas, such as large-particle coke shells, metal compounds, oil stains, small-particle-size dust and the like, and a high-temperature, high-humidity and high-corrosion sampling environment of the smoke waste gas.
The technical scheme of the invention is as follows: a smoke sampling probe device comprises a sampling tube and a two-stage filtering structure connected at one end of the sampling tube, wherein the two-stage filtering structure comprises a primary filter element close to the sampling tube, a secondary filter element far away from the sampling tube, a primary filter element mounting base matched with the primary filter element and a secondary filter element fixing base matched with the secondary filter element, one end of the primary filter element mounting base is connected with one end of the sampling tube, the other end of the primary filter element mounting base is connected with the secondary filter element fixing base through a heating ring fixing base, the secondary filter element is mounted on the secondary filter element fixing base and extends into the heating ring fixing base, one end of the secondary filter element fixing base is provided with a mounting handle, the other end of the sampling tube is provided with a smoke sampling port and a backflow port, the direction of the smoke sampling port is opposite to the direction of the flow rate of smoke, the backflow port is arranged in a downward sloping manner during mounting, and an inner back-blowing connector port, an outer back-blowing air inlet and a back-blowing air outlet are arranged on the heating ring fixing seat.
Preferably, the sampling tube is made of hastelloy materials, the sampling tube is large in aperture with the diameter of 80mm, a thick round tube with the wall thickness not smaller than 8mm is adopted, and the downward inclination angle of the backflow port is 10-15 degrees.
Preferably, elementary filter core is stainless steel wire form elementary filter core, and its filtration pore diameter is 100um, and the material is 316L stainless steel, elementary filter core installation base's top is equipped with the filter core sealed lid of filter core mounting hole and cooperation filter core mounting hole, the second grade filter core is ceramic second grade filter core, and its filtration pore diameter is 5um, and the second grade filter core dress is fixed through the filter core retaining ring on second grade filter core unable adjustment base.
Preferably, the filter element sealing cover is provided with grooves on two sides, so that the filter element sealing cover and the primary filter element mounting base are convenient to pry and detach by using a straight screwdriver when being bonded together.
Preferably, the one-level filter core is cylindrical netted, heating collar fixing base and second grade filter core all are cylindrical.
Preferably, connect through the ring flange subassembly between elementary filter core erection base and the sampling tube, the one end of sampling tube is equipped with the first ring flange that is used for connecting the chimney and is used for connecting elementary filter core erection base's second ring flange, first ring flange and second ring flange all adopt the integral structure with the sampling tube, elementary filter core erection base's one end is equipped with the third ring flange that is used for connecting the second ring flange, pass through the screw connection between ring flange and the elementary filter core erection base.
Preferably, the filter element sealing cover is connected with the primary filter element mounting base through an inner hexagonal loose screw, a high-temperature-resistant sealing ring is arranged between the filter element sealing cover and the primary filter element mounting base, the primary filter element mounting base and the heating ring fixing base are welded into a whole, and a temperature sensor mounting hole is formed in one side of the primary filter element mounting base.
Preferably, through the screw connection between heating collar fixing base and the fixed post, through the screw connection between second grade filter core unable adjustment base and the installation handle, through threaded connection between adjustable fixing base and the installation handle, constitute second grade filter core module unit after connecting between second grade filter core, second grade filter core unable adjustment base, the adjustable fixing base and the installation handle.
Preferably, be equipped with adjustable fixing base between installation handle and the second grade filter core fixing base, the tip of heating collar fixing base is equipped with a plurality of fixed posts of the adjustable fixing base of cooperation, be equipped with the draw-in groove of cooperation fixed post on the adjustable fixing base, be equipped with the rand of cooperation draw-in groove on the fixed post.
A back flushing method of a smoke sampling probe device comprises the following steps:
1) carrying out back flushing on the outside of the ceramic secondary filter element, carrying out back flushing on the stainless steel wire primary filter element while carrying out back flushing on the outside, wherein the back flushing lasts for 20S, discharging part of pollutants into a chimney through a sampling pipe, then opening an electric ball valve at a back flushing air outlet, and discharging the pollutants accumulated in the chamber through the back flushing air outlet;
2) controlling to close the electric ball valve at the back flushing air outlet through matched software of the smoke continuous online monitoring system, then starting back flushing the interior of the ceramic secondary filter element, keeping the back flushing time for 20 seconds, and then opening the electric ball valve at the back flushing air outlet to discharge pollutants through the electric ball valve at the air outlet;
3) the back flushing duration and the back flushing interval period of the internal back flushing and the external back flushing can be set according to the actual conditions of the working conditions. Meanwhile, in order to increase the back-blowing effect, a 2L gas storage tank is added at the back-blowing front end, so that the time for keeping the back-blowing pressure during back-blowing can be increased, and the back-blowing force is ensured.
The invention is mainly designed aiming at the smoke generated after heavy oil combustion, such as large particle coke shells, metal compounds, oil stains, small particle size dust and other easy-to-block substances in the ship smoke waste gas, and the high-temperature, high-humidity and high-corrosion sampling environment of the smoke waste gas, adopts the sampling pipe with the dustproof and waterproof structure, adopts a two-stage filtering and convenient-maintenance structure, and adopts a mode of firstly back flushing outside and then back flushing inside to purge the second-stage ceramic filter element in back flushing, thereby having the characteristics of long maintenance period, long service life, high reliability and the like.
Drawings
FIG. 1 is a schematic diagram of a two-stage filtration configuration according to the present invention;
FIG. 2 is a schematic view of the structure of the sampling tube of the present invention;
FIG. 3 is a schematic view of the sampling tube of the present invention after installation;
FIG. 4 is a schematic structural diagram of a blowback interface according to the present invention;
FIG. 5 is a schematic diagram of the gas circuit of the present invention;
FIGS. 6-8 are exhaust monitoring reports of experiments conducted in accordance with the present invention;
in the figure, 1, a return port, 2, a smoke sampling port, 3, a sampling tube, 4, a first flange plate, 5, a filter element sealing cover, 6, an inner hexagonal loose and loose screw, 7, a stainless steel wire-shaped primary filter element, 8, a heating ring fixing seat, 9, a fixing upright post, 10, a ceramic secondary filter element, 11, a secondary filter element fixing base, 12, an adjustable fixing seat, 13, a mounting handle, 14, a stainless steel filter element mounting base, 15, a third flange plate, 16, an inner back-blowing joint port, 17, an outer back-blowing air inlet, 18, a back-blowing air outlet, 19, a second flange plate, a collar, b, a clamping groove, c, a temperature sensor mounting hole, d, a groove, e, a filter element fixing ring, f, a sampling air path, g, an inner back-blowing air path and h, an outer back-blowing air path.
Detailed Description
The present invention will be described in further detail with reference to the attached drawings, but the present invention is not limited thereto.
The invention adopts two-stage filtration and maintainability design,
as shown in figures 1 and 2, a smoke sampling probe device comprises a sampling tube 3 and a two-stage filtering structure connected with one end of the sampling tube 3, wherein the two-stage filtering structure comprises a primary filter element close to the sampling tube 3, a secondary filter element far away from the sampling tube 3, a primary filter element mounting base matched with the primary filter element and a secondary filter element fixing base 11 matched with the secondary filter element, one end of the primary filter element mounting base is connected with one end of the sampling tube 3, the other end of the primary filter element mounting base is connected with the secondary filter element fixing base through a heating ring fixing base 8, the secondary filter element is mounted on the secondary filter element fixing base and extends into the heating ring fixing base 8, one end of the secondary filter element fixing base is provided with a mounting handle 13, the other end of the sampling tube 3 is provided with a smoke sampling port 2 and a backflow port 1, the orientation of the smoke sampling port 2 is opposite to the flow velocity direction of smoke, the backflow port 1 is arranged in a downward inclination manner when being mounted, the heating ring fixing seat 8 is provided with an inner back-blowing joint port 16, an outer back-blowing air inlet 17 and a back-blowing air outlet 18.
Elementary filter core is stainless steel wire form elementary filter core 7, and its filtration aperture is 100um, and the material is 316L stainless steel, and elementary filter core installation base is called stainless steel filter core installation base 14 below, and its top is equipped with the sealed lid 5 of filter core mounting hole and cooperation filter core mounting hole, and the second grade filter core is pottery second grade filter core 10, and its filtration aperture is 5um, and the second grade filter core dress is fixed through the solid fixed ring e of filter core on second grade filter core unable adjustment base 11.
The detailed operation steps of the installation of the two-stage filtering structure are as follows: screw 6 is not got rid of through the hexagon socket head cap pine and is connected between the sealed lid of filter core 5 and the stainless steel wire form primary filter core erection base 14, and contain high temperature resistant sealing washer between the two, pass through the screw connection between ring flange 15 and the stainless steel wire form primary filter core erection base 14, it is as an organic whole through the welding between stainless steel wire form primary filter core erection base 14 and the heating collar fixing base 8, pass through the screw connection between heating collar fixing base 8 and the stationary mast 9, connect through spare part filter core solid fixed ring e between pottery second grade filter core 10 and the filter core unable adjustment base 11, pass through the screw connection between filter core unable adjustment base 11 and the installation handle 13, pass through threaded connection between adjustable fixing base 12 and the installation handle 13. The ceramic secondary filter element 10, the filter element fixing base, the adjustable fixing base 11, the mounting handle 13 are connected and then are called as a secondary filter element module unit for short.
As can be seen from the figure 1, it is,
1: the stainless steel wire-shaped primary filter element 7 is arranged in front of the ceramic secondary filter element 10 to be used as primary filtration, the material of the stainless steel wire-shaped primary filter element is 316L stainless steel, the equivalent filtration pore diameter is about 100um, when smoke contains oil, dust, a large amount of water and other substances, the stainless steel wire-shaped primary filter element 7 is cylindrical, a mixture of oil, large-particle-diameter dust, water and other viscous substances can be attached to the surface of the stainless steel wire-shaped primary filter element 7, the stainless steel wire-shaped primary filter element 7 can effectively filter out coke shells, large-volume dust, oil and other mixed substances with the particle diameter of more than 100um in smoke waste to reach the surface of the ceramic secondary filter element 10 with the particle diameter of 5um, and the blockage of the surface of the ceramic secondary filter element 10 is delayed;
2: the filiform elementary filter core 7 of stainless steel need not to take off whole equipment under the pollution circumstances, only need to dismantle the sealed lid 5 of filter core back can change the elementary filter core 7 of stainless steel wire form, and the sealed lid 5 of filter core of the filiform elementary filter core 7 of fixed stainless steel adopts the hexagon socket head cap to loosen and does not take off screw 6 simultaneously, loses when preventing the on-the-spot dismantlement. When the filter element sealing cover 5 and the stainless steel wire-shaped primary filter element mounting base 14 are adhered together, the filter element sealing cover 5 and the stainless steel wire-shaped primary filter element mounting base 14 are conveniently pried and detached by using a straight screwdriver;
3: the stainless steel filiform primary filter element 7 and the ceramic secondary filter element 10 are both arranged in a high-temperature device and are designed with high-power heating rings, the heating control temperature is set to be not lower than 120 ℃, the filter element is not easy to contact with condensed water, so the filter element is not easy to be blocked due to mud formed after dust filtration meets liquid water, high-temperature dry dust on the surface of the filter element is easy to blow off during back blowing, the service life of the filter element is prolonged, the filter element can be cleaned and recycled under the pollution condition, and the maintenance cost is reduced.
4: as can be seen from fig. 1: only need install the draw-in groove position that arrow point b indicates in arrow point a rand department between "second grade filter core module unit" and fixed stand 9, then will install handle 13 clockwise rotation, can seal between the two, and install high temperature resistant sealing washer between the two. Under the condition of pollution of the ceramic secondary filter element, the ceramic secondary filter element can be detached and cleaned only by rotating the mounting handle 13 anticlockwise and taking out the clamping groove at the adjustable fixing seat 12b, the mounting is convenient, and no extra tool is needed;
5: as shown in fig. 1: the position c pointed by the arrow is a temperature sensor mounting hole and is arranged at the front end of the stainless steel filter element 7, so that the temperature in the sampling cavity can be effectively controlled to be not lower than 120 ℃, and the sampling device is stable and reliable in operation.
The sampling tube is designed by adopting a dustproof and waterproof structure;
as shown in figures 2 and 3, the flue gas sampling port 2 needs to be opposite to the flow velocity direction of flue gas during installation, and when the device is used for sampling, because the flue gas sampling port 2 is opposite to the flow velocity direction of flue gas, flue gas at the upper end of a sampling tube is adopted during sampling, particulate matters and water vapor with high dust and high humidity in the flue gas can be effectively avoided, and only the required flue gas is taken. Meanwhile, as indicated by an arrow 1, the front end of the sampling tube is provided with a return port which is inclined downwards by 10-15 degrees during installation, so that liquid water, oil and the like flow out under the action of gravity, and accumulation of the liquid water, the oil and the like in a sampling pipeline can be prevented. The sampling tube is made of Hastelloy materials, the diameter of the sampling tube is large, the wall thickness of the sampling tube is large and not smaller than 8mm, the sampling tube can be prevented from being blocked and corroded in the environment of high dust, high temperature, high humidity, high salt and high pH value of a chimney, the maintenance period and the service life of the sampling device are prolonged, the failure frequency is reduced, and the reliability of the device is improved. Meanwhile, the sampling tube 3, the first flange plate 4 (used for connecting a chimney) and the second flange plate 19 (used for connecting a two-stage filtering structure) are integrally designed, so that the sampling tube is convenient to mount.
The back blowing of the invention adopts a mode of firstly back blowing outside and then back blowing inside to blow the secondary ceramic filter core,
the traditional probe filter core only has the one-level, and only adopts inside or outside blowback to the blowback of probe, and the probe filter core is under the condition of pollution, because of the filter core adopts 5um aperture usually, then inside blowback can only blow back the pollutant in the cavity of installation filter core, can't effectively get rid of the pollutant, and the blowback can only blow down to the filter core outside equally, and the pollutant can only pass through in the sampling tube arranges to the chimney. As shown in figures 4 and 5, the internal and external back flushing are integrated, the back flushing air outlet 18 is arranged below the cavity of the secondary ceramic filter element, and a pressure relief channel, namely the back flushing air outlet, is arranged between the secondary ceramic filter element and the stainless steel wire-shaped primary filter element, so that the problem that the flow of a back flushing air path is reduced when the stainless steel wire-shaped primary filter element is blocked can be effectively avoided, and the back flushing effect on the ceramic secondary filter element is ensured. The outside blowback of ceramic second grade filter core is carried out earlier during the blowback, also carries out the blowback to the primary filter core of stainless steel wire form when outside blowback, and the blowback lasts 20S seconds, and with inside some pollutants pass through the sampling tube and discharge into the chimney, then open the electronic ball valve in blowback gas outlet, can discharge through blowback gas outlet 18 with piling up the pollutant in the cavity is inside. And then the electric ball valve of the back-blowing air outlet 18 is closed under the control of matched software of the smoke continuous online monitoring system, then back-blowing is started to the interior of the ceramic secondary filter element, the back-blowing time lasts for 20 seconds, and then the electric ball valve of the back-blowing air outlet is opened to discharge pollutants through the electric ball valve of the air outlet. The back flushing duration and the back flushing interval period of the inner back flushing and the outer back flushing can be set according to the actual conditions of working conditions. Meanwhile, in order to increase the back-blowing effect, a 2L air storage tank is added at the front end of the back-blowing, so that the duration of back-blowing pressure holding during back-blowing can be increased, and the back-blowing force is ensured.
The invention is a sampling device developed specially for the high dust, high temperature, high humidity, high salt and high pH value environment monitored by the smoke emission (such as ships and the like) taking fuel oil as fuel, meets the requirements of national relevant standards, is suitable for sampling the smoke waste gas emitted by power plants, oil refineries, chemical plants, cement plants, ships and the like, and particularly has the advantage of very obvious overlong maintenance period in the monitoring and sampling occasions of the smoke waste gas of boilers taking fuel oil as fuel.
Claims (10)
1. The utility model provides a flue gas sampling probe unit which characterized in that: it includes the sampling tube and connects the two-stage filtration at sampling tube one end, the two-stage filtration includes the elementary filter core that is close to the sampling tube and keeps away from the second grade filter core of sampling tube and the elementary filter core of cooperation elementary filter core installation base and the second grade filter core unable adjustment base of cooperation second grade filter core, the one end of elementary filter core installation base is connected with the one end of sampling tube, and the other end of elementary filter core installation base is connected with second grade filter core unable adjustment base through a heating collar fixing base, the second grade filter core is installed on second grade filter core unable adjustment base and is stretched into in the heating collar fixing base, the one end of second grade filter core fixing base is equipped with the installation handle, the other end of sampling tube is equipped with flue gas sample connection and backward flow mouth, flue gas sample connection's orientation and flue gas velocity of flow opposite direction, the downward sloping setting during backward flow mouth installation, be equipped with interior back-blowing connector mouth on the heating collar fixing base, An outer back-blowing air inlet and a back-blowing air outlet.
2. The smoke sampling probe apparatus of claim 1, wherein: the sampling tube adopts hastelloy material and sampling tube adopts the large aperture that the diameter is 80mm, and the thick pipe that the wall thickness was not less than 8mm is adopted to the sample tube, the angle of backward flow mouth downward sloping is 10-15.
3. The smoke sampling probe apparatus of claim 1, wherein: elementary filter core is stainless steel wire form elementary filter core, and its filtration aperture is 100um, and the material is 316L stainless steel, elementary filter core installation base's top is equipped with the filter core sealing cover of filter core mounting hole and cooperation filter core mounting hole, the second grade filter core is ceramic second grade filter core, and its filtration aperture is 5um, and the second grade filter core dress is fixed through the filter core retaining ring on second grade filter core unable adjustment base.
4. A smoke sampling probe apparatus according to claim 3 wherein: the filter element sealing cover is provided with grooves on two sides, so that when the filter element sealing cover and the primary filter element mounting base are adhered together, a straight screwdriver can be used for prying and dismounting.
5. A smoke sampling probe apparatus according to claim 3 wherein: the one-level filter core is cylindrical netted, heating collar fixing base and second grade filter core all are cylindrically.
6. The smoke sampling probe apparatus of claim 4, wherein: the utility model discloses a chimney filter core, including primary filter core installation base, sampling tube, flange dish and sampling tube, be connected through the flange dish subassembly between primary filter core installation base and the sampling tube, the one end of sampling tube is equipped with the first flange dish that is used for connecting the chimney and is used for connecting primary filter core installation base's second flange dish, first flange dish and second flange dish all adopt integrated structure with the sampling tube, the one end of primary filter core installation base is equipped with the third flange dish that is used for connecting the second flange dish, pass through the screw connection between flange dish and the primary filter core installation base.
7. The smoke sampling probe apparatus of claim 4, wherein: the filter core is sealed to be taken off the screw through the interior hexagonal pine between lid and the elementary filter core installation base and is connected, and contains high temperature resistant sealing washer between the two, through welding as an organic whole between elementary filter core installation base and the heating collar fixing base, and one side of elementary filter core installation base is equipped with the temperature sensor mounting hole.
8. The smoke sampling probe apparatus of claim 4, wherein: the heating ring fixing base is connected with the fixing stand column through screws, the second-stage filter element fixing base is connected with the installation handle through screws, the adjustable fixing base is connected with the installation handle through threads, and the second-stage filter element, the second-stage filter element fixing base, the adjustable fixing base and the installation handle are connected to form a second-stage filter element module unit.
9. The smoke sampling probe apparatus of claim 1, wherein: be equipped with adjustable fixing base between installation handle and the second grade filter core fixing base, the tip of heating collar fixing base is equipped with a plurality of fixed posts of the adjustable fixing base of cooperation, be equipped with the draw-in groove of cooperation fixed post on the adjustable fixing base, be equipped with the rand of cooperation draw-in groove on the fixed post.
10. A back flushing method for a smoke sampling probe device according to claim 1, characterized in that: the method comprises the following steps:
1) carrying out back flushing on the outside of the ceramic secondary filter element, carrying out back flushing on the stainless steel wire primary filter element while carrying out back flushing on the outside, wherein the back flushing lasts for 20S, discharging part of pollutants into a chimney through a sampling pipe, then opening an electric ball valve at a back flushing air outlet, and discharging the pollutants accumulated in the chamber through the back flushing air outlet;
2) controlling to close the electric ball valve at the back flushing air outlet through matched software of the smoke continuous online monitoring system, then starting back flushing the interior of the ceramic secondary filter element, keeping the back flushing time for 20 seconds, and then opening the electric ball valve at the back flushing air outlet to discharge pollutants through the electric ball valve at the air outlet;
3) the back flushing duration and the back flushing interval period of the internal back flushing and the external back flushing can be set according to the actual conditions of the working conditions. Meanwhile, in order to increase the back-blowing effect, a 2L gas storage tank is added at the back-blowing front end, so that the time for keeping the back-blowing pressure during back-blowing can be increased, and the back-blowing force is ensured.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210232009.XA CN114624070A (en) | 2022-03-02 | 2022-03-02 | Flue gas sampling probe device and back flushing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210232009.XA CN114624070A (en) | 2022-03-02 | 2022-03-02 | Flue gas sampling probe device and back flushing method thereof |
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| CN114624070A true CN114624070A (en) | 2022-06-14 |
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| CN202210232009.XA Pending CN114624070A (en) | 2022-03-02 | 2022-03-02 | Flue gas sampling probe device and back flushing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN118243456A (en) * | 2024-04-03 | 2024-06-25 | 浙江新寰科环保科技股份有限公司 | Gas sampling preprocessing device |
| CN119043828A (en) * | 2024-10-28 | 2024-11-29 | 杭州绰美科技有限公司 | Ship tail gas sampling device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116735794A (en) * | 2023-06-07 | 2023-09-12 | 江苏舒茨测控设备股份有限公司 | Power plant boiler furnace gas detection analysis system |
| CN118243456A (en) * | 2024-04-03 | 2024-06-25 | 浙江新寰科环保科技股份有限公司 | Gas sampling preprocessing device |
| CN118243456B (en) * | 2024-04-03 | 2024-10-11 | 浙江新寰科环保科技股份有限公司 | Gas sampling preprocessing device |
| CN119043828A (en) * | 2024-10-28 | 2024-11-29 | 杭州绰美科技有限公司 | Ship tail gas sampling device |
| CN119043828B (en) * | 2024-10-28 | 2025-02-11 | 杭州绰美科技有限公司 | Ship tail gas sampling device |
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