CN210375871U - Flue gas sampling rod structure of denitration system - Google Patents
Flue gas sampling rod structure of denitration system Download PDFInfo
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- CN210375871U CN210375871U CN201920797856.4U CN201920797856U CN210375871U CN 210375871 U CN210375871 U CN 210375871U CN 201920797856 U CN201920797856 U CN 201920797856U CN 210375871 U CN210375871 U CN 210375871U
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Abstract
The utility model provides a denitration system's flue gas sampling rod structure, including the analysis end that is arranged in the analysis flue gas, and with the sampling pipe in the flue gas passageway is connected and is stretched into to the analysis end, a serial communication port, the sampling pipe includes inner tube and the cover outer tube outside the inner tube, and sets up the inner tube with heating device between the outer tube. The utility model discloses a set up heating device in the sampling rod, the temperature that can make the sampling pipe keeps unanimous with the temperature of flue gas, makes the flue gas that gets into in the sampling pipe can not be because of the cold and hot difference in temperature, the phenomenon of condensing appears, has prolonged the life and the sampling precision of sampling pipe, and then has improved deNOx systems's purification efficiency.
Description
Technical Field
The utility model relates to a flue gas denitration field especially relates to a flue gas sampling rod structure of the deNOx systems who carries out denitration to the flue gas that the boiler produced.
Background
The importance of environmental protection at present goes without saying, and especially industry, enterprise make the country to its strict grasp to the pollution of environment, and to the denitration system of thermal power plant from the sample to measure to adjust the continuous standard that circulates and guarantee to discharge fume data, no matter which link goes wrong can all influence whole denitration system's efficiency.
The sampling rod of the flue gas sampling device of the existing denitration system is formed by a stainless steel single pipe with the length of 1.5 meters, the end part of the sampling rod is a sampling hole, the sampling rod samples in a flue gas pipeline by stretching into the flue gas pipeline, and transmits a sampling result to the denitration system, and the denitration system adjusts the ammonia spraying amount in real time according to the sampling result.
Because the difference of coal quality and corresponding procedure handle, can lead to dust and water content in the flue gas of certain time quantum great, if open when stopping the boiler, at this moment, when the sampling rod stretched into the high fever flue gas that contains moisture, because the temperature of self position is lower, can condense into harder hard piece under cold and hot alternation after the dust in the flue gas gets into the inside back of sampling rod, directly block up the dead sampling tube, the jam at the flue of sampling rod and the telescopic junction of flange is especially serious, lead to unable acquisition at all to survey the appearance result, and the hard piece after blockking up is very difficult to clear up.
In addition, the current sampling rod only has one sampling point, and the sampling result measured by the sampling rod is different along with the different depth of the sampling rod extending into the flue, so the measurement error of one sampling point is larger.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a flue gas sampling rod structure of deNOx systems who carries out denitration to the flue gas that the boiler produced is provided.
Particularly, the utility model provides a denitration system's flue gas sampling pole, including the analysis end that is used for the analysis flue gas, and with the sampling pipe in the flue gas passageway is connected and is stretched into to the analysis end, the sampling pipe includes the inner tube and overlaps the outer tube outside the inner tube, and sets up the inner tube with heating device between the outer tube.
In one embodiment of the present invention, the heating device is a heating wire.
The utility model discloses an in one embodiment, install control on the analysis end the regulating switch of heating wire temperature, the temperature range of heating wire is 140 ~ 180 degrees.
The utility model discloses an in one embodiment, the length of sampling pipe is 2 ~ 3 meters, the tip of sampling pipe is the thief hole, is in simultaneously evenly set up 2 ~ 3 thief holes on the pipe shaft of sampling pipe, the analysis end is mixed the back result value as final analysis object with the appearance gas of all thief hole collections.
In an embodiment of the present invention, the length of the sampling tube is 2.5 meters, and the number of the sampling holes provided on the tube body of the sampling tube is 2.
The utility model discloses an in one embodiment, heating device is including setting up the heating water tank on flue gas passageway, and will water in the heating water tank lets in the inner tube with the water pipe in space between the outer tube, and realize the heating water tank with water circulation's circulating pump between the space.
The utility model discloses a set up heating device in the sampling rod, the temperature that can make the sampling pipe keeps unanimous with the temperature of flue gas, makes the flue gas that gets into in the sampling pipe can not be because of the cold and hot difference in temperature, the phenomenon of condensing appears, has prolonged the life and the sampling precision of sampling pipe, and then has improved deNOx systems's purification efficiency.
Drawings
Fig. 1 is a schematic structural view of a sampling rod according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a sampling rod according to another embodiment of the present invention.
Detailed Description
As shown in fig. 1, the utility model discloses a flue gas sampling rod 20 of deNOx systems in an embodiment, this sampling rod 20 is installed in flue gas passageway 10 one side of boiler, include the analysis end 21 that carries out the analysis to the flue gas of gathering to and be connected and stretch into the sampling pipe 22 of gathering the flue gas in flue gas pipeline 10 with analysis end 21, wherein, analysis end 21 passes through flange 23 and is connected with flue gas passageway 10, and sampling pipe 22 adopts double-deck cup joint structure, including inner tube 221 and the outer tube 222 of cover outside inner tube 221, be provided with heating device 25 in the space between inner tube 221 and outer tube 222.
When the sampling rod 20 is used, one end of the sampling tube 22 is inserted into the smoke channel 10, the heating device 25 heats the inner tube 221 in advance, so that the temperature in the whole sampling tube 22 or the inner tube 221 is equal to the temperature of the current smoke, and after the smoke enters the inner tube 221, the smoke is uniform in temperature inside and outside, so that dust containing water vapor in the smoke cannot be condensed when being cooled, and the blockage of the inner tube 221 is avoided. The analysis end 21 analyzes the collected flue gas, and finally obtains the ammonia injection amount of the denitration system corresponding to the current flue gas content.
This embodiment is through setting up heating device 25 in sampling rod 20, and the temperature that can make sampling pipe 22 is corresponding with the temperature of flue gas, makes the flue gas that gets into in the sampling pipe 22 can not appear the phenomenon of condensing because of the cold and hot difference in temperature, has prolonged sampling pipe 22's life and sampling precision, and then has improved deNOx systems' purification efficiency.
The heating device 25 can be composed of a heating wire wound outside the inner tube 221 and a temperature adjusting switch arranged on the analysis end 21, the temperature adjusting switch is connected with the heating wire, the heating temperature of the heating wire is controlled while power is supplied to the heating wire, the temperature of the heating wire generally adapts to the smoke temperature of the current collection point, and the temperature can be specifically 140-180 degrees.
In order to improve the sampling precision, this sampling pipe 22's length can set up to 2 ~ 3 meters, preferably 2.5 meters, except that the open end at sampling pipe 22 sets up sampling hole 24, still evenly sets up 2 ~ 3 sampling holes 24 simultaneously on sampling pipe 22's the pipe shaft, preferably sets up 2. During sampling, the sampling pipe 22 is completely inserted into the flue passage 10, the sampling holes 24 on the sampling pipe 22 respectively collect the flue gas at the current position, then the flue gas is sent to the analysis end 21, the analysis end 21 mixes the sample gases collected by all the sampling holes 24, and then the mixed sample gases are analyzed to be used as the measurement result of the sampling. The embodiment adopts the concentration average values of different flue gases at different positions as the sample gas analysis basis, and compared with the prior art in which the flue gas at one acquisition point is used as the analysis target, the method has the advantages that the obtained result is more accurate and more reliable.
As shown in fig. 2, in an embodiment of the present invention, another structure of the heating device 25 is provided, and the heating device 25 includes a heating water tank 261 disposed on the side wall of the flue gas channel 10, a water pipe 263 connecting the heating water tank 261 and a space 264 between the inner pipe 221 and the outer pipe 222, and a circulation pump 262 circulating water in the heating water tank 261 and the space 264. In this embodiment, the water in the heating water tank 261 is directly heated by the flue gas, so that the temperature of the water inside can be kept consistent with the temperature of the flue gas, and after the hot water flows into the gap 264 of the sampling tube 22, the temperature of the sampling tube 22 can be kept consistent with the flue gas, so that the effect of preventing the flue gas entering the inner tube 221 from being condensed is achieved. In the embodiment, the sampling tube 22 is heated by directly utilizing the waste heat of the flue gas, so that the energy and the manufacturing cost of equipment can be saved.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.
Claims (6)
1. The utility model provides a denitration system's flue gas sampling rod structure, including the analysis end that is used for the analysis flue gas, and with the sampling pipe in the flue gas passageway is connected and is stretched into to the analysis end, its characterized in that, the sampling pipe includes the inner tube and overlaps the outer tube outside the inner tube, and sets up the inner tube with heating device between the outer tube.
2. The smoke sampling rod structure of claim 1,
the heating device is composed of an electric heating wire.
3. The smoke sampling rod structure of claim 2,
and an adjusting switch for controlling the temperature of the electric heating wire is arranged on the analysis end, and the temperature range of the electric heating wire is 140-180 ℃.
4. The smoke sampling rod structure of claim 1,
the length of sampling pipe is 2 ~ 3 meters, the tip of sampling pipe is the sampling hole, is in simultaneously evenly set up 2 ~ 3 sampling holes on the body of sampling pipe, the analysis end is got the result value as final analysis object after mixing the sample gas of all sampling hole collections.
5. The smoke sampling rod structure of claim 4,
the length of sampling pipe is 2.5 meters, the sampling hole quantity that the pipe shaft of sampling pipe set up is 2.
6. The smoke sampling rod structure of claim 1,
the heating device comprises a heating water tank arranged on the flue gas channel, a water pipe for introducing water in the heating water tank into a gap between the inner pipe and the outer pipe, and a circulating pump for realizing water circulation between the heating water tank and the gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920797856.4U CN210375871U (en) | 2019-05-29 | 2019-05-29 | Flue gas sampling rod structure of denitration system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920797856.4U CN210375871U (en) | 2019-05-29 | 2019-05-29 | Flue gas sampling rod structure of denitration system |
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| CN210375871U true CN210375871U (en) | 2020-04-21 |
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| CN201920797856.4U Active CN210375871U (en) | 2019-05-29 | 2019-05-29 | Flue gas sampling rod structure of denitration system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111721591A (en) * | 2020-05-13 | 2020-09-29 | 华电电力科学研究院有限公司 | Device for heating desulfurized flue gas CEMS sampling pipe by utilizing flue gas waste heat |
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2019
- 2019-05-29 CN CN201920797856.4U patent/CN210375871U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111721591A (en) * | 2020-05-13 | 2020-09-29 | 华电电力科学研究院有限公司 | Device for heating desulfurized flue gas CEMS sampling pipe by utilizing flue gas waste heat |
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