CN115901368A

CN115901368A - Sampling system for high-temperature flue gas emission online gas sample analysis and monitoring

Info

Publication number: CN115901368A
Application number: CN202211452755.6A
Authority: CN
Inventors: 马军伟; 许洪霞
Original assignee: Qingdao Bochen Ecological Environment Technology Group Co ltd
Current assignee: Qingdao Bochen Ecological Environment Technology Group Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-04-04

Abstract

The invention discloses a sampling system for on-line gas sample analysis and monitoring of high-temperature flue gas emission, and belongs to the field of flue gas treatment. Sampling system for high temperature flue gas emission on-line gas appearance analysis monitoring, including the sampling box, still include: the sampling box comprises an L-shaped sampling pipe and a detection probe, wherein the L-shaped sampling pipe is fixedly arranged in the sampling box, a detection pipe and a ventilation pipe are respectively arranged at two ends of the L-shaped sampling pipe, and the detection probe is fixedly arranged on the inner wall of the detection pipe; the driving motor is fixedly arranged at the bottom of the sampling box, and a negative pressure assembly connected with the driving motor is arranged in the detection pipe; the inner tube is connected in the detection tube in a sliding manner, and a gap is formed between the outer wall of the inner tube and the inner wall of the detection tube; the invention can cool the detection probe in the detection pipe, prevent the detection probe from being always in a high-temperature state, prolong the service life of the detection probe, automatically clean the dust on the detection probe and ensure the precision of detection sampling detection.

Description

Sampling system for high-temperature flue gas emission online gas sample analysis and monitoring

Technical Field

The invention relates to the technical field of flue gas treatment, in particular to a sampling system for on-line gas sample analysis and monitoring of high-temperature flue gas emission.

Background

Flue gas is a mixture of gas and smoke dust and is the main cause of atmospheric pollution in residential areas. The components of the flue gas are complex, the gas comprises sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, hydrocarbons, nitrogen oxides and the like, the smoke comprises ash, coal particles, oil drops, pyrolysis products and the like of the fuel, and in order to reduce the pollution of the flue gas to the air, the flue gas discharged in a factory needs to be sampled and detected through various detection probes, and if the flue gas is unqualified in emission, the flue gas is purified.

In a sampling system for detection, flue gas in a smoke exhaust pipe needs to be sucked through a sampling pipe, and then various harmful substances in the flue gas are detected through a detection probe.

Disclosure of Invention

The invention aims to solve the problem that dust in flue gas easily pollutes a detection probe in the prior art, and provides a sampling system for online gas sample analysis and monitoring of high-temperature flue gas emission.

In order to achieve the purpose, the invention adopts the following technical scheme:

sampling system for online gas sample analysis monitoring of high temperature flue gas emission, including the sampling case, still include: the sampling box comprises an L-shaped sampling pipe and a detection probe, wherein the L-shaped sampling pipe is fixedly arranged in the sampling box, a detection pipe and a ventilation pipe are respectively arranged at two ends of the L-shaped sampling pipe, and the detection probe is fixedly arranged on the inner wall of the detection pipe; the driving motor is fixedly arranged at the bottom of the sampling box, and a negative pressure assembly connected with the driving motor is arranged in the detection pipe; the inner tube, sliding connection is in the test tube, wherein, be equipped with the clearance between the inner wall of inner tube outer wall and test tube, the outer wall of inner tube is equipped with the brush that is located the clearance, be equipped with the elevating system that the drive inner tube reciprocated in the sampling box.

In order to promote test probe's life, preferably, the negative pressure subassembly is connected including rotating the pivot in the test tube, the upper end fixed mounting of pivot has the flabellum that is located the test tube, wherein, driving motor's output shaft extends to in the sampling box and fixed mounting has first incomplete gear and the incomplete gear of second, the lower extreme of pivot extends to in the sampling box and fixed mounting has two first gears, the incomplete gear of second and one of them first gear engagement, the bottom of sampling box is rotated and is installed the inertia gear with first incomplete gear engagement, the inertia gear still is connected with another first gear engagement.

In order to guarantee test probe's sampling detection precision, furtherly, elevating system connects including rotating reciprocal lead screw in the sampling box, wherein, the second gear is installed through one-way bearing to the lower extreme of reciprocal lead screw, the second gear is connected with one of them first gear engagement, fixedly connected with and reciprocal lead screw parallel arrangement's guide bar in the sampling box, the outer wall threaded connection of reciprocal lead screw has the reciprocal slide with guide bar sliding connection, reciprocal slide is through magnetism mechanism and inner tube connection of inhaling.

In order to drive the inner tube and reciprocate in the detecting tube, further, magnetism is inhaled the mechanism and is connected including rotating rotary drum on the reciprocating sliding plate, the rotary drum cover is established on the outer wall of detecting tube, wherein, the outer wall of inner tube rotates and is connected with the change pipe, the brush sets up on the outer wall of change pipe, and the outer wall fixed mounting of change pipe has first magnet, the inner wall fixedly connected with and the first magnet of rotary drum attract the second magnet mutually, be equipped with drive rotary drum pivoted rotation mechanism in the sampling box.

In order to rotate the inner tube in the detection tube, furthermore, the rotation mechanism comprises a rotating rod which is rotatably connected in the sampling box, a third gear is fixedly installed on the outer wall of the rotating rod, a long rod-shaped gear which is meshed and connected with the third gear is fixedly installed at the upper end of the rotating rod, and the lower end of the rotating rod is connected with the reciprocating lead screw through chain transmission.

In order to prevent the interior dust pollution flabellum with among the outside air of check pipe, furtherly, fixed mounting has first filter plate in the port of ventilation pipe, fixed mounting has the second filter plate in the check pipe, the second filter plate is located between flabellum and the inner tube.

In order to enable dust cleaned by the brush to fall off more quickly, preferably, a first conical cover is fixedly connected to the lower end of the inner pipe, a plurality of inner ventilation grooves distributed circumferentially are formed in the lower end of the first conical cover, the lower end of the first conical cover is rotatably connected with a second conical cover through a rotating column, a plurality of outer ventilation grooves distributed circumferentially are formed in the lower end of the second conical cover, and an automatic deflection mechanism is arranged on the second conical cover.

In order to realize the automatic shutoff of interior air duct, furtherly, automatic deflection mechanism includes fixed mounting and is in a plurality of slope blades of second toper cover lower extreme outer wall, it is a plurality of equal fixedly connected with runs through the limiting plate of outer air duct in the interior air duct, install the torsional spring between second toper cover and the first toper cover.

In order to reduce the frictional resistance when the inner tube slides up and down, preferably, a plurality of rollers distributed circumferentially are fixedly mounted on the outer wall of the inner tube, and all the rollers abut against the inner wall of the detection tube.

In order to clean the dust filtered by the upper end face of the second filter plate, furthermore, the upper end of the rotating shaft extends to the upper end of the second filter plate, a cleaning rod is fixedly mounted at the upper end of the rotating shaft, and a cleaning brush is arranged on the cleaning rod and abuts against the upper end face of the second filter plate.

Compared with the prior art, the invention provides a sampling system for online gas sample analysis and monitoring of high-temperature flue gas emission, which has the following beneficial effects:

1. this online gas sample of high temperature smoke emission sampling system for analysis and monitoring, drive first gear and flabellum reversal through the incomplete gear of second, the port of test tube then can begin to exhaust, thereby to be located the flue gas of L shape in the test tube after arranging back to the flue gas pipeline, and the ventilation pipe still can absorb the outside air and enter into in the L shape test tube, thereby can cool down the test probe in the test tube, prevent that test probe from being in the high temperature state always, promote test probe's life.

2. This online sampling system for gas sample analysis and monitoring of high temperature flue gas emission drives reciprocal lead screw through the first gear of reversal and rotates, and reciprocal lead screw then can drive reciprocal slide from top to bottom in the sampling box and slide, and the inner tube then can clean the inner wall of test tube through the brush of outer wall, guarantees test probe's sampling detection precision to under the effect of pivoted flabellum, blow back the dust of clearance in the flue gas pipeline.

3. This sampling system is used in online gas appearance analysis and monitoring of high temperature flue gas emission drives long rod-shaped gear through reciprocal lead screw and rotates, and the rotary drum then can drive the second magnet circumference and sweep, and the second magnet then can drive first magnet circumference and sweep, and first magnet then can drive the inner tube at the test tube internal rotation to it is better to make the brush clearance dust effect of test tube outer wall.

4. This sampling system is used in online gas appearance analysis and monitoring of high temperature flue gas emission through when the detecting tube exhausts flue gas pipeline, the air current can make outer air channel not coincide with interior air channel, and the air current in the detecting tube can be concentrated to the clearance all around of inner tube because of the effect of second toper cover, then can make the dust that the brush cleaned drop more fast, and then promote the effect to the inner wall clearance of detecting tube.

Drawings

FIG. 1 is a schematic diagram of an axial measurement structure of a sampling system for on-line analysis and monitoring of high-temperature flue gas emission provided by the invention;

FIG. 2 is a schematic view of a front sectional structure of the sampling system for on-line analysis and monitoring of high-temperature flue gas emission provided by the invention;

FIG. 3 is a schematic view of a partial structure in FIG. 2 of the sampling system for on-line analysis and monitoring of high-temperature flue gas emission provided by the present invention;

FIG. 4 is an enlarged view of part A in FIG. 3 of the sampling system for on-line analysis and monitoring of high-temperature flue gas emission provided by the present invention;

FIG. 5 is a schematic view of a local axial structure of the sampling system for on-line analysis and monitoring of high-temperature flue gas emission provided by the invention;

FIG. 6 is a schematic view of an inner tube axis measuring structure of the sampling system for on-line gas sample analysis and monitoring of high-temperature flue gas emission provided by the invention;

fig. 7 is an exploded view of the inner tube of the sampling system for high temperature flue gas emission online gas sample analysis and monitoring proposed by the present invention.

In the figure: 1. a sampling box; 2. an L-shaped sampling tube; 3. a detection tube; 4. a vent pipe; 5. detecting a probe; 6. a drive motor; 7. a rotating shaft; 8. a fan blade; 9. a first incomplete gear; 10. a second incomplete gear; 11. a first gear; 12. an inner tube; 13. a brush; 14. rotating the pipe; 15. a first magnet; 16. a reciprocating screw; 17. a second gear; 18. a reciprocating slide plate; 19. a rotating drum; 20. a second magnet; 21. a third gear; 22. a long rod-shaped gear; 23. a rotating rod; 24. chain transmission; 25. a first filter plate; 26. a second filter plate; 27. a roller; 28. a first conical cover; 29. an inner vent groove; 30. a second conical cover; 31. an outer vent channel; 32. a pitch blade; 33. turning the column; 34. A limiting plate; 35. a cleaning rod; 36. an idler gear; 37. a guide bar; 38. and a one-way bearing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example 1:

referring to fig. 1-7, the sampling system for high-temperature flue gas emission online gas sample analysis monitoring comprises a sampling box 1, and further comprises: the device comprises an L-shaped sampling pipe 2 fixedly arranged in a sampling box 1, wherein a detection pipe 3 and a ventilation pipe 4 are respectively arranged at two ends of the L-shaped sampling pipe 2, and a detection probe 5 is fixedly arranged on the inner wall of the detection pipe 3 and mainly consists of a sensor for detecting harmful substances in smoke; the driving motor 6 is fixedly arranged at the bottom of the sampling box 1, and a negative pressure assembly connected with the driving motor 6 is arranged in the detection pipe 3; the inner tube 12 is connected in the detection tube 3 in a sliding mode, a gap is formed between the outer wall of the inner tube 12 and the inner wall of the detection tube 3, a brush 13 located in the gap is arranged on the outer wall of the inner tube 12, and a lifting mechanism for driving the inner tube 12 to move up and down is arranged in the sampling box 1.

When using, communicate the 3 ends of the test tube on the L shape sampling pipe 2 to the flue gas pipeline, then start driving motor 6, driving motor 6 can make the port of test tube 3 breathe in through negative pressure assembly, and the port of ventilation pipe 4 exhausts, test tube 3 then can inhale the flue gas in the flue gas pipeline in the test tube 3, test probe 5 in test tube 3 then can carry out the sampling test to the flue gas, and can also make the port of ventilation pipe 4 breathe in, and the port of test tube 3 can begin to exhaust, thereby will be located the flue gas after the detection in the L shape sampling pipe 2 and arrange back to the flue gas pipeline in, and ventilation pipe 4 still can absorb outside air and enter into L shape sampling pipe 2, thereby can cool down test probe 5 in test tube 3, prevent that test probe 5 from being in the high temperature state always, promote test probe 5's life, two sets of operation mode can automatic alternate operation, namely can accomplish the intermittent sampling test work of flue gas, and the elevating system can make test tube 3 when exhausting to the flue gas pipeline, 12 can be in test probe 3 can be in the up-down removal, then the inner wall of reciprocating movement of inner wall 12 then clean the test tube 3, thereby the inner wall of dust detection probe 13 that can blow back to the test tube, thereby the inner wall of dust detection probe 5 and the test tube, thereby the dust detection precision of dust detection probe 5 is guaranteed, thereby the inner wall of dust detection effect of dust removal.

Furthermore, a plurality of rollers 27 are fixedly arranged on the outer wall of the inner tube 12, and the rollers 27 are abutted against the inner wall of the detection tube 3, so that the rollers 27 can reduce the frictional resistance when the inner tube 12 slides up and down.

Example 2:

referring to FIG. 2, essentially the same as example 1, further, a specific embodiment of a negative pressure assembly is specifically disclosed.

The negative pressure assembly comprises a rotating shaft 7 which is rotatably connected in the detection tube 3, the upper end of the rotating shaft 7 is fixedly provided with fan blades 8 which are positioned in the detection tube 3, wherein an output shaft of a driving motor 6 extends into the sampling box 1 and is fixedly provided with a first incomplete gear 9 and a second incomplete gear 10, namely straight gears with half of the number of teeth, the lower end of the rotating shaft 7 extends into the sampling box 1 and is fixedly provided with two first gears 11, the second incomplete gear 10 is meshed with one of the first gears 11, the bottom of the sampling box 1 is rotatably provided with an inert gear 36 meshed with the first incomplete gear 9, the inert gear 36 is further meshed with the other first gear 11, when the first incomplete gear 9 is meshed with the inert gear 36, the second incomplete gear 10 is meshed with the first gear 11, namely, the first incomplete gear 9 and the second incomplete gear 10 are staggered with each other.

In the use process, the driving motor 6 can drive the first incomplete gear 9 and the second incomplete gear 10 to synchronously rotate, because the teeth of the first incomplete gear 9 and the second incomplete gear 10 are only half, and when the first incomplete gear 9 is meshed with the inert gear 36, the second incomplete gear 10 is not meshed with the first gear 11, then when the first incomplete gear 9 is meshed with the inert gear 36, the inert gear 36 can drive the first gear 11 meshed therewith to rotate, the first gear 11 can drive the rotating shaft 7 to rotate, the rotating shaft 7 can drive the fan blade 8 to rotate, the L-shaped sampling pipe 2 can make the port of the detection pipe 3 suck air under the action of the rotating fan blade 8, and the port of the ventilation pipe 4 exhausts air, the detection pipe 3 can suck the smoke in the detection pipe 3, the detection probe 5 in the detection pipe 3 can sample and detect the smoke, when the first incomplete gear 9 rotates to not be meshed with the inert gear 36, the second incomplete gear 10 can start to be meshed with the other first gear 11, and make the first gear 11 rotate with the ventilation pipe 5 to sample and detect the smoke in the smoke, thereby the detection pipe 2 can drive the sampling probe to reversely suck air in the detection pipe 4, thereby the detection pipe can prevent the sampling pipe from entering the detection pipe 4, thereby the detection pipe 3, the detection pipe 2 from reversely rotating, thereby the detection pipe can detect the smoke.

Furthermore, a first filter plate 25 is fixedly installed in the port of the ventilation pipe 4, a second filter plate 26 is fixedly installed in the detection pipe 3, the second filter plate 26 is located between the fan blades 8 and the inner pipe 12, the second filter plate 26 can prevent dust in the detection pipe 3 from polluting the fan blades 8, and the first filter plate 25 can prevent dust in the outside air from polluting the fan blades 8.

Furthermore, the upper end of the rotating shaft 7 extends to the upper end of the second filter plate 26, a cleaning rod 35 is fixedly mounted at the upper end of the rotating shaft 7, a cleaning brush which abuts against the upper end surface of the second filter plate 26 is arranged on the cleaning rod 35, when the rotating shaft 7 rotates, the rotating shaft 7 can drive the cleaning rod 35 to rotate, and the cleaning rod 35 can clean dust filtered by the upper end surface of the second filter plate 26 through the cleaning brush.

Example 3:

referring to fig. 2-5, a further embodiment of the lift mechanism is specifically disclosed, substantially as in example 2.

The lifting mechanism comprises a reciprocating lead screw 16 which is rotatably connected in the sampling box 1, wherein the lower end of the reciprocating lead screw 16 is provided with a second gear 17 through a one-way bearing 38, the second gear 17 is meshed with one of the first gears 11, a guide rod 37 which is parallel to the reciprocating lead screw 16 is fixedly connected in the sampling box 1, the outer wall of the reciprocating lead screw 16 is in threaded connection with a reciprocating sliding plate 18 which is in sliding connection with the guide rod 37, and the reciprocating sliding plate 18 is connected with the inner tube 12 through a magnetic suction mechanism.

When the first gear 11 rotates, the first gear 11 can drive the second gear 17 engaged with the first gear to rotate, because the second gear 17 is installed at one end of the reciprocating screw rod 16 through the one-way bearing 38, only when the first gear 11 rotates reversely, the second gear 17 can drive the reciprocating screw rod 16 to rotate, the reciprocating screw rod 16 can drive the reciprocating sliding plate 18 to slide up and down in the sampling box 1 in a reciprocating manner, so as to drive the rotary drum 19 to slide up and down in the outer wall of the detection tube 3 in a reciprocating manner, the rotary drum 19 can drive the inner tube 12 to slide up and down in the detection tube 3 in a reciprocating manner through the magnetic attraction mechanism, the inner tube 12 can clean the inner wall of the detection tube 3 through the brush 13 on the outer wall, thereby cleaning dust on the inner wall of the detection tube 3 and the detection probe 5, ensuring the sampling detection precision of the detection probe 5, and blowing the cleaned dust back into the flue gas pipeline under the action of the rotating fan blades 8.

Example 4:

referring to fig. 2-7, essentially the same as example 3, further, a specific embodiment of the magnetic attracting mechanism is specifically disclosed.

The magnetic suction mechanism comprises a rotary drum 19 which is rotatably connected to a reciprocating sliding plate 18, the rotary drum 19 is sleeved on the outer wall of the detection tube 3, wherein the outer wall of the inner tube 12 is rotatably connected with a rotary tube 14, a brush 13 is arranged on the outer wall of the rotary tube 14, a first magnet 15 is fixedly arranged on the outer wall of the rotary tube 14, a second magnet 20 which attracts the first magnet 15 is fixedly connected to the inner wall of the rotary drum 19, an electromagnet can be used in practice, the detected smoke temperature is within 300 ℃, the lower the smoke temperature is, the better the smoke temperature is, the smaller the influence on the magnetic attraction of the first magnet 15 attracting the second magnet 20 is, and a self-rotation mechanism which drives the rotary drum 19 to rotate is arranged in the sampling box 1; the rotation mechanism comprises a rotating rod 23 which is rotatably connected in the sampling box 1, a third gear 21 is fixedly arranged on the outer wall of the rotating cylinder 19, wherein a long rod-shaped gear 22 which is meshed and connected with the third gear 21 is fixedly arranged at the upper end of the rotating rod 23, the lower end of the rotating rod 23 is connected with the reciprocating screw 16 through a chain transmission 24, and the chain transmission 24 is a transmission assembly consisting of a chain and a chain wheel.

When the rotary drum 19 slides up and down in a reciprocating manner on the outer wall of the detection tube 3, the rotary drum 19 drives the first magnet 15 to synchronously slide in a reciprocating manner through the second magnet 20, the first magnet 15 drives the inner tube 12 to slide up and down in the detection tube 3 in a reciprocating manner, the inner tube 12 cleans the inner wall of the detection tube 3 through the brush 13 on the outer wall, when the reciprocating lead screw 16 rotates, the reciprocating lead screw 16 drives the long rod-shaped gear 22 to rotate through the chain transmission 24, the long rod-shaped gear 22 drives the third gear 21 to rotate, the third gear 21 drives the rotary drum 19 to rotate, the rotary drum 19 drives the second magnet 20 to circumferentially sweep, the second magnet 20 drives the first magnet 15 to circumferentially sweep, the first magnet 15 drives the inner tube 12 to rotate in the detection tube 3, and therefore the brush 13 on the outer wall of the detection tube 3 has a better dust cleaning effect.

Example 5:

referring to fig. 2 to 4 and fig. 6 to 7, substantially the same as in example 1, further, an embodiment of increasing the efficiency of removing dust from the inner wall of the detecting tube 3 is specifically provided.

A first conical cover 28 is fixedly connected to the lower end of the inner pipe 12, a plurality of circumferentially distributed inner vent grooves 29 are formed in the lower end of the first conical cover 28, wherein the lower end of the first conical cover 28 is rotatably connected with a second conical cover 30 through a rotating column 33, a plurality of circumferentially distributed outer vent grooves 31 are formed in the lower end of the second conical cover 30, and an automatic deflection mechanism is arranged on the second conical cover 30; the automatic deflection mechanism comprises a plurality of inclined blades 32 fixedly mounted on the outer wall of the lower end of the second conical cover 30, similar to an impeller and capable of rotating under the action of high-speed airflow, a plurality of inner vent grooves 29 are fixedly connected with limiting plates 34 penetrating through the outer vent grooves 31, and a torsion spring is mounted between the second conical cover 30 and the first conical cover 28.

When the detection tube 3 exhausts to the flue gas pipeline, the air current can drive the rotation of second conical cover 30 through slope blade 32, when outer air channel 31 not with interior air channel 29 coincidence, the rotation of second conical cover 30 can be spacing by limiting plate 34, the air current in the detection tube 3 can be concentrated in the clearance all around of inner tube 12 because of the effect of second conical cover 30 this moment, the air current velocity of flow of being concentrated is faster, so can make the dust that brush 13 cleaned drop more fast, and then promote the effect to the clearance of detection tube 3 inner wall, when the detection tube 3 breathes in to the flue gas pipeline, the torsional spring can make second conical cover 30 rotate and reset, outer air channel 31 can coincide with interior air channel 29 once more, the air current can pass in interior air channel 29 and the outer air channel 31, and then make the air current velocity in the detection tube 3 return to normal.

The sampling system for the high-temperature flue gas emission online gas sample analysis and monitoring is characterized in that when the sampling system is used, the tail end of a detection pipe 3 on an L-shaped sampling pipe 2 is communicated to a flue gas pipeline, then a driving motor 6 is started, the driving motor 6 can drive a first incomplete gear 9 and a second incomplete gear 10 to synchronously rotate, as the gear teeth of the first incomplete gear 9 and the second incomplete gear 10 are only half, and when the first incomplete gear 9 is meshed with an inert gear 36, the second incomplete gear 10 is not meshed with a first gear 11, so when the first incomplete gear 9 is meshed with the inert gear 36, the inert gear 36 can drive the first gear 11 meshed with the inert gear to rotate, the first gear 11 can drive a rotating shaft 7 to rotate, the rotating shaft 7 can drive a fan blade 8 to rotate, the L-shaped sampling pipe 2 can enable a port of the detection pipe 3 to suck gas under the action of the rotating fan blade 8, the port of the ventilation pipe 4 exhausts, the detection pipe 3 sucks the smoke in the smoke pipeline into the detection pipe 3, the detection probe 5 in the detection pipe 3 samples and detects the smoke, when the first incomplete gear 9 rotates to be not meshed with the inert gear 36, the second incomplete gear 10 starts to be meshed with the other first gear 11 and enables the first gear 11 to rotate reversely, so that the rotating shaft 7 and the fan blades 8 are driven to rotate reversely, the L-shaped sampling pipe 2 sucks the smoke through the port of the ventilation pipe 4, the port of the detection pipe 3 starts to exhaust, the smoke detected in the L-shaped sampling pipe 2 is discharged back into the smoke pipeline, the ventilation pipe 4 can suck external air into the L-shaped sampling pipe 2, the detection probe 5 in the detection pipe 3 can be cooled, and the detection probe 5 is prevented from being in a high-temperature state all the time, the service life of the detection probe 5 is prolonged.

When the first gear 11 rotates, the first gear 11 drives the second gear 17 engaged with the first gear to rotate, because the second gear 17 is installed at one end of the reciprocating screw 16 through the one-way bearing 38, only when the first gear 11 rotates reversely, the second gear 17 drives the reciprocating screw 16 to rotate, the reciprocating screw 16 drives the reciprocating slide plate 18 to slide up and down in the sampling box 1 in a reciprocating manner, so as to drive the rotary drum 19 to slide up and down in a reciprocating manner on the outer wall of the detection tube 3, the rotary drum 19 drives the first magnet 15 to slide in a reciprocating manner synchronously through the second magnet 20, the first magnet 15 drives the inner tube 12 to slide up and down in the detection tube 3 in a reciprocating manner, the inner tube 12 cleans the inner wall of the detection tube 3 through the brush 13 on the outer wall, thereby cleaning dust on the inner wall of the detection tube 3 and the detection probe 5, ensuring the sampling detection accuracy of the detection probe 5, and blowing the cleaned dust back into the flue gas pipeline under the action of the rotating fan blade 8.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. Sampling system for high temperature flue gas emission on-line gas appearance analysis monitoring, including sampling box (1), its characterized in that still includes:

an L-shaped sampling pipe (2) which is fixedly arranged in the sampling box (1),

a detection pipe (3) and a ventilation pipe (4) are respectively arranged at two ends of the L-shaped sampling pipe (2), and a detection probe (5) is fixedly installed on the inner wall of the detection pipe (3);

a driving motor (6) fixedly arranged at the bottom of the sampling box (1),

wherein a negative pressure component connected with a driving motor (6) is arranged in the detection tube (3);

an inner tube (12) slidably connected within the detection tube (3),

wherein, be equipped with the clearance between the inner wall of inner tube (12) outer wall and detecting tube (3), the outer wall of inner tube (12) is equipped with brush (13) that are located the clearance, be equipped with the elevating system that drives inner tube (12) and reciprocate in sampling box (1).

2. The online sampling system for analyzing and monitoring the gas sample of the high-temperature smoke discharge according to claim 1, wherein the negative pressure assembly comprises:

a rotating shaft (7) rotatably connected in the detecting tube (3), the upper end of the rotating shaft (7) is fixedly provided with a fan blade (8) positioned in the detecting tube (3),

wherein, the output shaft of driving motor (6) extends to in sampling case (1) and fixed mounting has first incomplete gear (9) and second incomplete gear (10), the lower extreme of pivot (7) extends to in sampling case (1) and fixed mounting has two first gear (11), second incomplete gear (10) and one of them first gear (11) meshing, the bottom of sampling case (1) is rotated and is installed inertia gear (36) with first incomplete gear (9) meshing, inertia gear (36) still are connected with another first gear (11) meshing.

3. The sampling system for the online analysis and monitoring of the gas sample of the high-temperature flue gas emission according to claim 2, wherein the lifting mechanism comprises:

a reciprocating screw rod (16) which is rotationally connected in the sampling box (1),

wherein, second gear (17) are installed through one-way bearing (38) to the lower extreme of reciprocal lead screw (16), second gear (17) are connected with one of them first gear (11) meshing, fixedly connected with and reciprocal lead screw (16) parallel arrangement's guide bar (37) in sampling box (1), the outer wall threaded connection of reciprocal lead screw (16) has reciprocal slide (18) with guide bar (37) sliding connection, reciprocal slide (18) are connected with inner tube (12) through magnetism mechanism of inhaling.

4. The sampling system for the online analysis and monitoring of the gas sample of the high-temperature flue gas emission according to claim 3, wherein the magnetic attraction mechanism comprises:

a rotating drum (19) rotationally connected to the reciprocating sliding plate (18), wherein the rotating drum (19) is sleeved on the outer wall of the detection tube (3),

the sampling box comprises an inner pipe (12), a rotating pipe (14), a brush (13), a first magnet (15), a second magnet (20) and a rotation mechanism, wherein the outer wall of the inner pipe (12) is connected with the rotating pipe (14) in a rotating mode, the brush (13) is arranged on the outer wall of the rotating pipe (14), the first magnet (15) is fixedly mounted on the outer wall of the rotating pipe (14), the inner wall of the rotating pipe (19) is fixedly connected with the second magnet (20) which attracts the first magnet (15), and the rotation mechanism for driving the rotating pipe (19) to rotate is arranged in the sampling box (1).

5. The online sampling system for analyzing and monitoring the gas sample of the high-temperature flue gas emission according to claim 4, wherein the self-rotation mechanism comprises:

a rotating rod (23) which is connected in the sampling box (1) in a rotating way, a third gear (21) is fixedly arranged on the outer wall of the rotating cylinder (19),

the upper end of the rotating rod (23) is fixedly provided with a long rod-shaped gear (22) meshed and connected with the third gear (21), and the lower end of the rotating rod (23) is connected with the reciprocating screw rod (16) through a chain transmission (24).

6. The sampling system for the online analysis and monitoring of the gas sample emitted by the high-temperature flue gas as claimed in claim 2, wherein a first filter plate (25) is fixedly installed in the port of the ventilation pipe (4), a second filter plate (26) is fixedly installed in the detection pipe (3), and the second filter plate (26) is located between the fan blades (8) and the inner pipe (12).

7. The sampling system for the online analysis and monitoring of the gas sample of the high-temperature flue gas emission according to claim 1, wherein a first conical cover (28) is fixedly connected to the lower end of the inner pipe (12), a plurality of inner ventilation grooves (29) distributed circumferentially are formed in the lower end of the first conical cover (28),

the lower end of the first conical cover (28) is rotatably connected with a second conical cover (30) through a rotating column (33), the lower end of the second conical cover (30) is provided with a plurality of external vent grooves (31) distributed circumferentially, and the second conical cover (30) is provided with an automatic deflection mechanism.

8. The sampling system for the online analysis and monitoring of the gas sample of the high-temperature flue gas emission according to claim 7, wherein the automatic deflection mechanism comprises:

fixedly mounted are in a plurality of slope blade (32) of second toper cover (30) lower extreme outer wall, and are a plurality of equal fixedly connected with runs through limiting plate (34) of outer air duct (31) in interior air duct (29), install the torsional spring between second toper cover (30) and first toper cover (28).

9. The sampling system for the online analysis and monitoring of the gas sample emitted by the high-temperature flue gas as claimed in claim 1, wherein a plurality of circumferentially distributed rollers (27) are fixedly mounted on the outer wall of the inner pipe (12), and the plurality of rollers (27) are abutted against the inner wall of the detection pipe (3).

10. The sampling system for the online analysis and monitoring of the high-temperature flue gas emission samples as claimed in claim 6, wherein the upper end of the rotating shaft (7) extends to the upper end of the second filter plate (26), a sweeping rod (35) is fixedly mounted at the upper end of the rotating shaft (7), and a sweeping brush which abuts against the upper end face of the second filter plate (26) is arranged on the sweeping rod (35).