CN216747619U - Oxygen content measuring device based on grid multiple points - Google Patents
Oxygen content measuring device based on grid multiple points Download PDFInfo
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- CN216747619U CN216747619U CN202122914502.3U CN202122914502U CN216747619U CN 216747619 U CN216747619 U CN 216747619U CN 202122914502 U CN202122914502 U CN 202122914502U CN 216747619 U CN216747619 U CN 216747619U
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Abstract
The utility model discloses an oxygen measuring device based on grid multipoint, which comprises a compressed air filter box, an air source distribution box, a zirconia oxygen analyzer, a multipoint sampler, a negative pressure generator, a heating coil, a back flushing pipe, a sample gas collecting main pipe and a sample gas return pipe, the inlet of the compressed air filter box is filled with compressed air, the outlet of the compressed air filter box is connected with the inlet of the air source distribution box, the outlet of the air source distribution box is respectively connected with the inlets of the back flushing pipe and the heating coil, the outlet of the heating coil is connected with the air source port of the negative pressure generator, the negative pressure generator is arranged on the sample gas return pipe, one end of the sample gas return pipe is communicated with the sample gas collecting main pipe, the other end of the sample gas return pipe is communicated with the flue, the multipoint sampler is arranged in the flue, a sample gas outlet of the multipoint sampler is connected with a sample gas collecting main pipe, and the sample gas collecting main pipe is provided with the zirconia oxygen analyzer. The utility model discloses can reduce the total amount of wind of boiler and reduce the electric current of sending the draught fan, have apparent success to improving boiler efficiency.
Description
Technical Field
The utility model relates to an oxygen volume measuring device based on net multiple spot mainly is applicable to the measurement that thermal power plant's denitration front end flue included oxygen volume.
Background
In the coal-fired boiler, in order to ensure the sufficient combustion of fuel, the actual air quantity provided for the boiler is larger than the theoretical air quantity required by the combustion, and the over-high or over-low oxygen content of flue gas can cause the efficiency of the boiler to be reduced, so that the energy consumption of a coal-fired power plant is increased, and therefore the measurement and monitoring of the oxygen content of the flue gas are very important.
At present, the measurement of the oxygen content in the front end flue of the denitration device of a thermal power plant mainly depends on a single-point measurement mode, and because the cross section area of the flue is large, the flue gas in the flue is uneven, the turbulence phenomenon is serious, the single measurement is not representative, and the measurement data deviation is large, the total air quantity of a boiler and the current of a draught fan are large, so that the energy waste is caused.
Disclosure of Invention
An object of the utility model is to solve above-mentioned problem, provide an oxygen content measuring device based on net multiple spot, it is through installing cross-section multiple spot sampling device in denitrification facility front end flue, makes the sample representative, and the measured value is more accurate, can reduce the total amount of wind of boiler and reduce the draught fan current of sending simultaneously to it is low to improve boiler efficiency, reduces the power cost.
In order to achieve the purpose, the utility model adopts the technical proposal that: an oxygen content measuring device based on grid multipoint comprises a compressed air filter box, an air source distribution box, a zirconia oxygen analyzer, a multipoint sampler, a negative pressure generator, a heating coil, a back flushing pipe, a sample gas collecting main pipe and a sample gas return pipe, the inlet of the compressed air filter box is filled with compressed air, the outlet of the compressed air filter box is connected with the inlet of the air source distribution box, the outlet of the air source distribution box is respectively connected with the inlets of the back flushing pipe and the heating coil pipe through pipelines, the outlet of the heating coil is connected with the air source port of the negative pressure generator, the negative pressure generator is arranged on the sample gas return pipe, sample gas return pipe one end collects female pipe with sample gas and is linked together, and the other end is linked together with the flue, the multiple spot sampler sets up in the flue, and the female pipe is collected to the sample gas exit linkage sample gas of multiple spot sampler, and the sample gas is collected and is installed on the female pipe the zirconia oxygen analysis appearance.
Furthermore, the sample gas collecting main pipe is perpendicular to the side wall of the flue, a zirconium oxide oxygen analyzer is installed at the top end of the sample gas collecting main pipe, the side end of the sample gas collecting main pipe is connected with a sample gas return pipe, and the sample gas return pipe is integrally arranged in parallel with the flue.
Furthermore, the back flushing pipe is connected to the sample gas return pipe, and the installation position of the back flushing pipe is located at the front end of the negative pressure generator.
Furthermore, a sample gas return pipe between the back flushing pipe and the negative pressure generator is provided with a high-temperature back flushing manual ball valve.
Furthermore, a flow velocity measurer is arranged on the sample gas return pipe between the back flushing pipe and the negative pressure generator, and the flow velocity measurer is positioned at the front end of the high-temperature back flushing manual ball valve.
Furthermore, the negative pressure generators and the heating coil pipes are arranged in two numbers, the two negative pressure generators are installed in series, and the heating coil pipe is arranged on a pipeline between each negative pressure generator and the air source distribution box.
Further, the air supply distribution box sets up three gas outlets, and every gas outlet department all is provided with manual ball valve, is respectively: the device comprises a first manual ball valve, a second manual ball valve and a third manual ball valve, wherein the first manual ball valve and the second manual ball valve are respectively in control connection with pipelines of two negative pressure generators, and the third manual ball valve is in control connection with a pipeline of a blowback pipe.
Further, the multipoint sampler adopts a multipoint equal-quantity sampler, and 16 sampling points are set.
The utility model has the advantages that: the device changes the phenomena of large total air quantity of the boiler and large current of a draught fan caused by poor representativeness of single-point measurement data and inaccurate measurement result in the prior art. The device realizes multi-point on-line measurement, has the characteristics of good measurement data representativeness and high measurement precision, and plays a good role in promoting the energy conservation and consumption reduction of the boiler.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of the local heating coil connection of the present invention.
Labeled as: 1-compressed air filter box, 2-air source distribution box, 3-blowback pipe, 4-zirconia oxygen analyzer, 5-multipoint sampler, 6-negative pressure generator, 7-heating coil, 8-high temperature blowback manual ball valve, 9-flow rate measurer, 10-sample gas collecting main pipe, 11-sample gas return pipe, 12-flue, 13-first manual ball valve, 14-second manual ball valve, and 15-third manual ball valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides an embodiment: the utility model provides an oxygen content measuring device based on net multiple spot, it includes compressed air rose box 1, air supply distributor box 2, zirconia oxygen analysis appearance 4, multiple spot sampler 5, negative pressure generator 6, heating coil 7, and blowback pipe 3, appearance gas collect female pipe 10 and appearance gas return pipe 11, compressed air rose box 1's import lets in compressed air, the import of exit linkage air supply distributor box 2, and the export of air supply distributor box 2 passes through the pipeline and connects the entry of blowback pipe 3 and heating coil 7 respectively, the exit linkage air supply mouth of negative pressure generator 6 of heating coil 7, negative pressure generator 6 installs on appearance gas return pipe 11, appearance gas return pipe 11 one end collects female pipe 10 with appearance gas and is linked together, and the other end is linked together with flue 12, multiple spot sampler 5 sets up in flue 12, and multiple spot sampler 5's appearance gas exit linkage appearance gas collects pipe 10, the sample gas collecting main pipe 10 is arranged perpendicular to the side wall of the flue 12, the zirconia oxygen analyzer 4 is arranged at the top end of the sample gas collecting main pipe, the side end of the sample gas collecting main pipe is connected with a sample gas return pipe 11, and the whole sample gas return pipe 11 is arranged in parallel with the flue 12.
In this embodiment, the blowback pipe 3 is connected to the sample return pipe 11, and the mounting position of the blowback pipe 3 is located at the front end of the negative pressure generator 6. Meanwhile, a high-temperature back-blowing manual ball valve 8 and a flow rate measurer 9 are installed on the sample gas return pipe 11 between the back-blowing pipe 3 and the negative pressure generator 6, and the flow rate measurer 9 is located at the front end of the high-temperature back-blowing manual ball valve 8.
In this embodiment, the negative pressure generators 6 and the heating coil pipes 7 are both provided in two, the two negative pressure generators 6 are installed in series, and the heating coil pipe 7 is arranged on a pipeline between each negative pressure generator 6 and the air source distribution box 2. Simultaneously, air supply distributor box 2 sets up three gas outlet, and every gas outlet department all is provided with manual ball valve, is respectively: the negative pressure generator comprises a first manual ball valve 13, a second manual ball valve 14 and a third manual ball valve 15, wherein the first manual ball valve 13 and the second manual ball valve 14 are respectively in control connection with pipelines of the two negative pressure generators 6, and the third manual ball valve 15 is in control connection with a pipeline of the blowback pipe 3. When the negative pressure generator works normally, the heating coil 7 heats the compressed air, so that the temperature of the compressed air entering the negative pressure generator 6 is kept at a high temperature state (above 100 ℃), and thus, the dust gas in the pipeline is prevented from being condensed and blocked due to too low temperature of the compressed air, and the smoothness of the system pipeline is ensured.
In this embodiment, the multipoint sampler 5 is a multipoint equal-quantity sampler, and 16 sampling points are provided. The equivalent sampling can be realized to 16 sampling points of system during operation, and the gas that samples of every point gathers through the gas sample and gathers female pipe 10 and gather the back and measure the gas sample that gathers through zirconia oxygen analyzer 4, for guaranteeing to realize that every point can the equivalent sampling, and pipe diameter and distance that every sample connection extremely gathers female pipe equal. The measured sample gas returns to the flue by the negative pressure generated by the negative pressure generator 6, and the whole system does not discharge any waste gas, thereby not causing air pollution; in addition, through carrying on the back flushing, can clear away the deposition in the pipeline, keep the unblocked of every pipeline, achieve the effect of taking a sample continuously. It should be noted that the equivalent sampler used in the present embodiment is an existing sampler, and specifically, reference may be made to an equidistant equivalent area sampling device disclosed in the patent CN 213456323U of the applicant's prior application.
The grid multipoint-based oxygen quantity measuring device comprises the following working processes: the device is normal during operation, open the manual ball valve 8 of high temperature blowback, open first manual ball valve 13 and the manual ball valve 14 of second, close third manual ball valve 15, device power is provided by the negative pressure generator 6 of two series connections, wherein negative pressure generator 6's vacuum adsorption mouth is towards the 11 entry ends of sample gas return pipe, the gas vent is towards 11 exit ends of sample gas return pipe, then 16 sample gas that the sampling point was taken out carry out the on-line measurement through zirconia oxygen analysis appearance 4 after gathering the female pipe, flue gas after the measurement returns the flue after passing through negative pressure generator 6.
When the device needs blowback, close manual ball valve 8 of high temperature blowback, close first manual ball valve 13 and second manual ball valve 14, open third manual ball valve 15, the device begins blowback work, and the blowback time can be set for as required.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present invention in any way, and all technical solutions obtained by using equivalent substitution and the like fall within the scope of the present invention.
The utility model discloses the part that does not relate to all is the same with prior art or can adopt prior art to realize.
Claims (8)
1. An oxygen content measuring device based on grid multipoint is characterized by comprising a compressed air filter box, an air source distribution box, a zirconia oxygen analyzer, a multipoint sampler, a negative pressure generator, a heating coil, a back flushing pipe, a sample gas collecting main pipe and a sample gas return pipe, the inlet of the compressed air filter box is filled with compressed air, the outlet of the compressed air filter box is connected with the inlet of the air source distribution box, the outlet of the air source distribution box is respectively connected with the inlets of the back flushing pipe and the heating coil pipe through pipelines, the outlet of the heating coil is connected with the air source port of the negative pressure generator, the negative pressure generator is arranged on the sample gas return pipe, sample gas return pipe one end collects female pipe with sample gas and is linked together, and the other end is linked together with the flue, the multiple spot sampler sets up in the flue, and the female pipe is collected to the sample gas exit linkage sample gas of multiple spot sampler, and the sample gas is collected and is installed on the female pipe the zirconia oxygen analysis appearance.
2. The grid multipoint-based oxygen amount measuring device according to claim 1, wherein the sample gas collecting main pipe is installed perpendicular to the side wall of the flue, a zirconia oxygen analyzer is installed at the top end of the sample gas collecting main pipe, a sample gas return pipe is connected to the side end of the sample gas collecting main pipe, and the sample gas return pipe is integrally arranged in parallel with the flue.
3. The grid multipoint-based oxygen measuring device as claimed in claim 1, wherein the blowback pipe is connected to the sample gas return pipe, and the mounting position of the blowback pipe is located at the front end of the negative pressure generator.
4. The grid multipoint-based oxygen quantity measuring device as claimed in claim 1 or 3, wherein a high temperature back-blowing manual ball valve is installed on the sample gas return pipe between the back-blowing pipe and the negative pressure generator.
5. The grid multipoint-based oxygen quantity measuring device as claimed in claim 4, wherein a flow rate measurer is installed on the sample gas return pipe between the blowback pipe and the negative pressure generator, and the flow rate measurer is located at the front end of the high temperature blowback manual ball valve.
6. The grid multipoint-based oxygen amount measuring device according to claim 1 or 2, wherein two negative pressure generators and two heating coils are provided, two negative pressure generators are installed in series, and one heating coil is provided on the pipeline between each negative pressure generator and the air source distribution box.
7. The grid multipoint-based oxygen amount measuring device according to claim 6, wherein the gas source distribution box is provided with three gas outlets, and each gas outlet is provided with a manual ball valve, which is respectively: the device comprises a first manual ball valve, a second manual ball valve and a third manual ball valve, wherein the first manual ball valve and the second manual ball valve are respectively in control connection with pipelines of two negative pressure generators, and the third manual ball valve is in control connection with a pipeline of a blowback pipe.
8. The grid multipoint-based oxygen measurement device according to claim 1, wherein said multipoint sampler is a multipoint equal sampler, and 16 sampling points are provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122914502.3U CN216747619U (en) | 2021-11-25 | 2021-11-25 | Oxygen content measuring device based on grid multiple points |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122914502.3U CN216747619U (en) | 2021-11-25 | 2021-11-25 | Oxygen content measuring device based on grid multiple points |
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| CN216747619U true CN216747619U (en) | 2022-06-14 |
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| CN202122914502.3U Active CN216747619U (en) | 2021-11-25 | 2021-11-25 | Oxygen content measuring device based on grid multiple points |
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| CN (1) | CN216747619U (en) |
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2021
- 2021-11-25 CN CN202122914502.3U patent/CN216747619U/en active Active
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