CN218212638U - Smoke gas patrol and measurement system - Google Patents
Smoke gas patrol and measurement system Download PDFInfo
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- CN218212638U CN218212638U CN202222241336.XU CN202222241336U CN218212638U CN 218212638 U CN218212638 U CN 218212638U CN 202222241336 U CN202222241336 U CN 202222241336U CN 218212638 U CN218212638 U CN 218212638U
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Abstract
The utility model discloses a flue gas patrols survey system belongs to gaseous sampling technical field. The device comprises a flue gas sampling device, a plurality of branch flue gas buffer tanks, a mixed flue gas measuring device and branch flue gas measuring devices; the smoke sampling device is composed of a compressed air main pipe and a multi-path smoke sampling pipe assembly, a back-blowing control valve can be opened after dust deposition in a probe in the smoke sampling device reaches a certain degree, compressed air is introduced through the compressed air main pipe, and the dust deposition at a filter element of the smoke sampling probe is back-blown to a hearth, so that the problem of blockage of a measuring point of the probe is solved. The system adopts a mode that the mixed flue gas measuring device and the branch flue gas measuring devices are connected in parallel, so that the average concentration of the flue gas to be measured can be quickly measured, and whether each path of flue gas is representative or not can be detected and judged by the branch flue gas measuring devices, and the measuring accuracy is ensured; through the setting of branch road flue gas buffer tank, mix flue gas and branch road flue gas test can go on simultaneously, and the result can be directly perceived and carry out the comparison.
Description
Technical Field
The utility model belongs to the technical field of gaseous check out test set, in particular to flue gas patrols survey system.
Background
The reducing atmosphere in the power station boiler is easy to generate H 2 S and other gases which are easy to cause high-temperature corrosion of water-cooled walls, in order to monitor H in the furnace in real time 2 And the concentration of S and other gases needs to be provided with a smoke gas patrol system to guide the combustion adjustment of the boiler and prolong the service life of the water wall of the boiler. The boiler flue gas testing technology generally uses a tunable semiconductor laser absorption spectroscopy (TDLAS) technology, and mainly realizes measurement of single or several absorption lines of molecules which are very close to each other and difficult to distinguish through the characteristics that the narrow line width and the wavelength of a tunable semiconductor laser are changed along with the injection current.
At present, a patrol detection system for boiler flue gas detection mainly extracts high-dust-content flue gas in a boiler for detection by arranging a plurality of detection points on each wall surface.
Chinese patent application publication No. CN 113916614A discloses a flue gas sampling system for a thermal power plant, which realizes uniform mixing of flue gas at each sampling point through a flue gas mixing tank, but because of the high dust-containing characteristic of flue gas, the mixed gas sample has no representativeness under the condition of measuring point blockage;
the Chinese patent application with the publication number of CN 214277895U discloses a gas multi-concentration synchronous detection device, which realizes multi-path gas concentration detection through a guide rail, but because a detection probe and a gas cavity have sliding friction, the problem of gas tightness cannot be ignored, and the accuracy of a detection result is directly influenced.
Disclosure of Invention
In order to improve the accuracy of flue gas measurement, the utility model provides a flue gas patrols survey system, technical scheme as follows:
a smoke patrol measuring system comprises a smoke sampling device, a plurality of branch smoke buffer tanks, a mixed smoke measuring device and branch smoke measuring devices;
the flue gas sampling device consists of a compressed air main pipe and a multi-path flue gas sampling pipe assembly, wherein the flue gas sampling pipe assembly comprises a flue gas sampling probe, a back flushing control valve and a flue gas sampling pipe, an inlet of the flue gas sampling probe is connected with a flue gas sampling point on the wall surface of the boiler, an outlet of the flue gas sampling probe is connected with one end of the flue gas sampling pipe, and the other end of the flue gas sampling pipe is connected with an inlet of a corresponding branch flue gas buffer tank; the side wall of the smoke sampling probe is connected with a compressed air main pipe through a back flushing control valve;
the quantity of branch road flue gas buffer tank the same with the quantity of flue gas sampling tube subassembly, the first export of each branch road flue gas buffer tank links to each other with mixed flue gas measuring device, the second export of each branch road flue gas buffer tank links to each other with branch road flue gas measuring device.
Preferably, the mixed flue gas measuring device comprises a mixed side flue gas detector, a mixed flue gas cavity, a mixed side laser emitter, a mixed side vacuum pump and a flue gas mixing main pipe; the first outlets of the branch flue gas buffer tanks are connected with the inlet of the flue gas mixing main pipe, and the outlet of the flue gas mixing main pipe is connected with the mixed flue gas cavity; the mixed smoke cavity is provided with a mixed side vacuum pump, the bottom of the mixed smoke cavity is provided with a mixed side laser emitter, and the top of the mixed smoke cavity is provided with a mixed side smoke detector.
As the optimization of the utility model, the branch flue gas measuring device comprises a branch side flue gas detector, a branch flue gas cavity, a branch side laser emitter, a branch side vacuum pump and a plurality of branch flue gas regulating valves; the second outlets of the branch flue gas buffer tanks are respectively connected with branch flue gas cavities through corresponding branch flue gas regulating valves, branch flue gas cavities are provided with branch side vacuum pumps, the bottoms of the branch flue gas cavities are provided with branch side laser transmitters, and the tops of the branch flue gas cavities are provided with branch side flue gas detectors.
As the optimization of the utility model, the number of the branch flue gas buffer tanks is 3 to 6.
The utility model discloses the beneficial effect who possesses: the utility model provides an in the probe among the flue gas sampling device deposition reach and can open the blowback control valve after the certain degree, introduce compressed air through the female pipe of compressed air, with flue gas sampling probe filter core department deposition blowback furnace, solved probe measurement station jam problem. The system adopts a mode that the mixed flue gas measuring device and the branch flue gas measuring device are connected in parallel, so that the average concentration of the flue gas to be measured can be quickly measured, and whether each path of flue gas is representative or not can be detected and judged through the branch flue gas measuring device, and the measuring accuracy is ensured; through the setting of branch road flue gas buffer tank, mix flue gas and branch road flue gas test can go on simultaneously, and the result can be directly perceived and carry out the comparison.
Drawings
Fig. 1 is a schematic structural diagram of a smoke sampling device in a smoke patrol system according to an embodiment of the present invention;
fig. 2 is a schematic view of a connection relationship between a smoke detection device and a branch smoke buffer tank in a smoke patrol system according to an embodiment of the present invention;
in the figure: the device comprises a 1-1 mixing side flue gas detector, a 1-2 mixing flue gas cavity, a 1-3 mixing side laser emitter, a 1-4 mixing side vacuum pump, a 1-5 flue gas mixing main pipe, a 2 branch flue gas buffer tank, a 3-1 branch flue gas detector, a 3-2 branch flue gas cavity, a 3-3 branch side laser emitter, a 3-4 branch side vacuum pump, a 3-5 branch flue gas regulating valve, a 4-1 flue gas sampling probe, a 4-2 flue gas sampling measuring point, a 4-3 flue gas sampling pipe, a 4-4 back-blowing control valve and a 4-5 compressed air main pipe.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.
As shown in FIG. 1, the embodiment discloses a flue gas sampling device which is composed of a four-way flue gas sampling pipe assembly and a compressed air main pipe 4-5, wherein four flue gas sampling measuring points 4-2 are arranged on the wall surface of a boiler.
In this embodiment, each flue gas sampling pipe assembly comprises a flue gas sampling probe 4-1, a back-flushing control valve 4-4 and a flue gas sampling pipe 4-3, an inlet of the flue gas sampling probe 4-1 is connected with a flue gas sampling point on a wall surface of a boiler, an outlet of the flue gas sampling probe 4-1 is connected with one end of the flue gas sampling pipe, the other end of the flue gas sampling pipe is connected with an inlet of a corresponding branch flue gas buffer tank 2, and the four branch flue gas buffer tanks 2 in this embodiment are independent of each other. The side wall of the smoke sampling probe 4-1 is connected with a compressed air main pipe 4-5 through a back flushing control valve 4-4.
Flue gas sampling process: the flue gas to be detected is extracted from a flue gas sampling measuring point 4-2 on the wall surface of the boiler through each flue gas sampling pipe assembly, dust in the dust-containing flue gas is filtered through a flue gas sampling probe 4-1, and the flue gas to be detected of each branch without dust is sent to a corresponding branch flue gas buffer tank 2 through a flue gas sampling pipe 4-3. When the ash accumulation in the smoke sampling probe 4-1 reaches a certain degree, the back-blowing control valve 4-4 on the corresponding branch is opened, compressed air is introduced through the compressed air main pipe 4-5, and the ash accumulation at the filter element of the smoke sampling probe 4-1 is back-blown to the furnace cavity, so that the condition that the detection result is influenced due to the blockage of the probe measuring point is avoided.
As shown in fig. 2, the first export of each branch road flue gas buffer tank 2 links to each other with mixed flue gas measuring device, and the second export of each branch road flue gas buffer tank 2 links to each other with branch road flue gas measuring device, and through the setting of branch road flue gas buffer tank, mixed flue gas and branch road flue gas test can go on simultaneously, and the comparison can be directly perceived to the result.
In the embodiment, the mixed flue gas measuring device comprises a mixed side flue gas detector 1-1, a mixed flue gas cavity 1-2, a mixed side laser emitter 1-3, a mixed side vacuum pump 1-4 and a flue gas mixed main pipe 1-5; the first outlets of the branch flue gas buffer tanks 2 are connected with the inlets of the flue gas mixing main pipes 1-5, and the outlets of the flue gas mixing main pipes 1-5 are connected with the mixed flue gas cavity 1-2; the mixed smoke gas cavity 1-2 is provided with a mixed side vacuum pump 1-4, the bottom of the mixed smoke gas cavity 1-2 is provided with a mixed side laser emitter 1-3, and the top of the mixed smoke gas cavity 1-2 is provided with a mixed side smoke gas detector 1-1.
The mixed smoke measuring process comprises the following steps: the mixed side vacuum pump 1-4 works to pump out gas in the mixed smoke gas cavity 1-2 to generate negative pressure, the smoke gas to be detected of each branch in the branch smoke gas buffer tank 2 is pumped into the mixed smoke gas cavity 1-2 through the smoke gas mixing main pipe 1-5, and the smoke gas of each branch is uniformly mixed under the action of the negative pressure; at the moment, based on a TDLAS detection technology, the mixed side laser emitter 1-3 generates laser, the laser passes through the mixed smoke cavity 1-2 of the fully mixed smoke and then reaches the mixed side smoke detector 1-1, and the concentration of the component to be detected of the mixed smoke is measured.
In the embodiment, the branch flue gas measuring device comprises a branch flue gas detector 3-1, a branch flue gas cavity 3-2, a branch laser emitter 3-3, a branch vacuum pump 3-4 and a plurality of branch flue gas regulating valves 3-5; the second outlets of the branch flue gas buffer tanks 2 are respectively connected with branch flue gas cavities 3-2 through corresponding branch flue gas regulating valves 3-5, branch side vacuum pumps 3-4 are installed on the branch flue gas cavities 3-2, branch side laser transmitters 3-3 are installed at the bottoms of the branch flue gas cavities 3-2, and branch side flue gas detectors 3-1 are installed at the tops of the branch flue gas cavities 3-2.
The process of independently measuring the flue gas of each branch: the branch road side vacuum pump 3-4 works to pump out the gas in the branch road smoke gas cavity 3-2 to generate negative pressure; opening a branch flue gas regulating valve 3-5 of a branch to be tested, and pumping the flue gas to be tested in a branch flue gas buffer tank 2 of a prediction branch into a branch flue gas cavity 3-2; at the moment, based on a TDLAS detection technology, the branch side laser emitter 3-3 generates laser, the laser passes through the branch flue gas cavity 3-2 and then reaches the branch side flue gas detector 3-1, and the concentration of the component to be detected of the branch flue gas is measured.
The utility model discloses an adopt the mode that mixes flue gas measuring device and branch road flue gas measuring device and connect in parallel, both can record the average concentration of the flue gas that awaits measuring fast, also can detect through branch road flue gas measuring device and judge whether each way flue gas is representative, guaranteed the measuring accuracy.
On the basis of fig. 1 and fig. 2, those skilled in the art can also change the number of branches according to actual needs.
The utility model is not the best known technology.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. Modifications and variations of the present invention are within the scope of the claims.
Claims (4)
1. A smoke patrol system is characterized by comprising a smoke sampling device, a plurality of branch smoke buffer tanks (2), a mixed smoke measuring device and branch smoke measuring devices;
the flue gas sampling device is composed of a compressed air main pipe (4-5) and a multi-path flue gas sampling pipe assembly, the flue gas sampling pipe assembly comprises a flue gas sampling probe (4-1), a back flushing control valve (4-4) and a flue gas sampling pipe (4-3), an inlet of the flue gas sampling probe (4-1) is connected with a flue gas sampling point on the wall surface of the boiler, an outlet of the flue gas sampling probe (4-1) is connected with one end of the flue gas sampling pipe, and the other end of the flue gas sampling pipe is connected with an inlet of a corresponding branch flue gas buffer tank (2); the side wall of the smoke sampling probe (4-1) is connected with a compressed air main pipe (4-5) through a back flushing control valve (4-4);
the quantity of branch road flue gas buffer tank (2) the same with the quantity of flue gas sampling tube subassembly, the first export of each branch road flue gas buffer tank (2) links to each other with mixing flue gas measuring device, the second export of each branch road flue gas buffer tank (2) links to each other with branch road flue gas measuring device.
2. The smoke patrol system according to claim 1, wherein the mixed smoke measuring device comprises a mixed side smoke detector (1-1), a mixed smoke cavity (1-2), a mixed side laser emitter (1-3), a mixed side vacuum pump (1-4) and a smoke mixing main pipe (1-5); the first outlets of the branch flue gas buffer tanks (2) are connected with the inlets of the flue gas mixing main pipes (1-5), and the outlets of the flue gas mixing main pipes (1-5) are connected with the mixed flue gas cavities (1-2); the mixed smoke detector is characterized in that a mixed side vacuum pump (1-4) is installed on the mixed smoke cavity (1-2), a mixed side laser emitter (1-3) is installed at the bottom of the mixed smoke cavity (1-2), and a mixed side smoke detector (1-1) is installed at the top of the mixed smoke cavity (1-2).
3. The smoke patrol system according to claim 1, wherein the branch smoke measuring device comprises a branch smoke detector (3-1), a branch smoke chamber (3-2), a branch laser transmitter (3-3), a branch vacuum pump (3-4) and a plurality of branch smoke regulating valves (3-5); second outlets of the branch flue gas buffer tanks (2) are respectively connected with branch flue gas cavities (3-2) through corresponding branch flue gas regulating valves (3-5), branch flue gas cavities (3-2) are provided with branch road side vacuum pumps (3-4), the bottoms of the branch flue gas cavities (3-2) are provided with branch road side laser transmitters (3-3), and the tops of the branch flue gas cavities (3-2) are provided with branch road side flue gas detectors (3-1).
4. The smoke patrol system according to claim 1, wherein the number of the branch smoke buffer tanks is 3-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222241336.XU CN218212638U (en) | 2022-08-23 | 2022-08-23 | Smoke gas patrol and measurement system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222241336.XU CN218212638U (en) | 2022-08-23 | 2022-08-23 | Smoke gas patrol and measurement system |
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| CN218212638U true CN218212638U (en) | 2023-01-03 |
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| CN202222241336.XU Active CN218212638U (en) | 2022-08-23 | 2022-08-23 | Smoke gas patrol and measurement system |
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