CN210922870U - Flue gas measuring device - Google Patents
Flue gas measuring device Download PDFInfo
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- CN210922870U CN210922870U CN201921229877.2U CN201921229877U CN210922870U CN 210922870 U CN210922870 U CN 210922870U CN 201921229877 U CN201921229877 U CN 201921229877U CN 210922870 U CN210922870 U CN 210922870U
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- flue gas
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- incinerator
- temperature
- sampler
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Abstract
The utility model provides a flue gas measuring device, include: an incinerator configured to incinerate the garbage to generate flue gas; the sampling unit is configured to perform multipoint sampling on the smoke; the mixing device is communicated with the sampling unit and is configured to mix the flue gas obtained by multipoint sampling; detection device installs in the mixing arrangement, the configuration is to detect the temperature that mixes the flue gas and according to the utility model provides a flue gas measuring device carries out the multiple spot sample through the flue gas of sampling unit in to the incinerator, then mixes the multichannel flue gas in mixing arrangement to measure the temperature that mixes the flue gas, with the realization directly, accurate measurement to the flue gas temperature.
Description
Technical Field
The utility model relates to a msw incineration field particularly relates to a flue gas measuring device.
Background
A large amount of smoke can be generated in the process of waste incineration, and dioxin can be generated if the temperature of the smoke is low in the process of waste incineration, so that the environment is seriously damaged. In order to ensure the sufficient decomposition of dioxin and control the indexes of pollutants in the flue gas, the temperature of the flue gas needs to be controlled. Wherein, according to the national standard GB18485-2014 pollution control Standard for domestic waste incineration, the method has an important index: the incineration temperature in the hearth is more than or equal to 850 ℃ and the smoke retention time is more than or equal to 2s (seconds), which is abbreviated as 850 ℃/2s index in the text.
850 ℃/2S is an important index, however, in actual production, because of the influence of factors such as flame radiation in a hearth, flue gas flow rate change and the like, the index cannot be directly detected, calculation can only be performed according to boiler load through a thermodynamic formula, the whole calculation process is complex and has too much associated data, so that the data accuracy is poor, and the calculated temperature value is difficult to completely and accurately reflect the flue gas temperature condition.
Therefore, there is a need to provide a new smoke measuring device to solve the above problems.
SUMMERY OF THE UTILITY MODEL
In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.
The utility model provides a flue gas measuring device, include:
an incinerator configured to incinerate the garbage to generate flue gas;
the sampling unit is configured to perform multipoint sampling on the smoke;
the mixing device is communicated with the sampling unit and is configured to mix the flue gas obtained by multipoint sampling;
and the detection device is arranged in the mixing device and is configured to detect the temperature of the mixed flue gas.
Further, the sampling unit comprises a sampler and a sampling pipeline, the sampler is installed at the tail end of the sampling pipeline, and the sampler is arranged in the incinerator.
Further, the flue gas measuring device further comprises:
and the filtering device is arranged on the sampler so as to prevent the particles in the flue gas from entering the sampling pipeline.
Further, the flue gas measuring device further comprises:
and the back flushing device is communicated with the sampling pipeline and is configured to utilize compressed air to carry out back flushing on the sampling pipeline so as to keep the sampling pipeline clean.
Further, the flue gas measuring device further comprises:
and the circulating water cooling device is connected with the mixing device and is configured to cool the mixed flue gas.
Further, the flue gas measuring device further comprises:
and the circulating fan is arranged between the circulating water cooling device and the incinerator and is configured to send the cooled mixed flue gas into the incinerator again.
Further, the detection device comprises a thermocouple.
Further, the flue gas measuring device further comprises:
and the control unit is configured to receive the temperature value measured by the detection device and generate a control signal so as to enable the residence time of the flue gas in an area with the temperature of above 850 ℃ in the incinerator to be above 2 seconds.
Further, the control unit includes a programmable logic controller.
Further, the sampling unit and the mixing device are both provided with heat insulation layers.
According to the utility model provides a flue gas measuring device carries out the multiple spot sample through the flue gas of sampling unit in to the incinerator, then mixes the multichannel flue gas in mixing arrangement to measure the temperature of mixing the flue gas, with the realization to direct, the accurate measurement of flue gas temperature.
Drawings
The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles and devices of the invention. In the drawings, there is shown in the drawings,
fig. 1 is a schematic diagram of a smoke measuring device according to an exemplary embodiment of the present invention.
Reference numerals
1. Incinerator 2 and sampling unit
3. Mixing device 4 and detection device
5. Circulating water cooling device 6 and back flushing device
7. Circulating fan
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.
In order to thoroughly understand the present invention, detailed steps will be presented in the following description in order to explain the flue gas measuring device proposed by the present invention. It is apparent that the practice of the invention is not limited to the specific details known to those skilled in the art. The preferred embodiments of the present invention are described in detail below, however, other embodiments of the present invention are possible in addition to these detailed descriptions.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
850 ℃/2S is an important index, however, in actual production, because of the influence of factors such as flame radiation in a hearth, flue gas flow rate change and the like, the index cannot be directly detected, calculation can only be performed according to boiler load through a thermodynamic formula, the whole calculation process is complex and has too much associated data, so that the data accuracy is poor, and the calculated temperature value is difficult to completely and accurately reflect the flue gas temperature condition. If single-point sampling measurement is adopted, if a thermocouple is inserted into the first flue for direct monitoring, the accuracy is poor, and the condition of temperature distribution in the flue cannot be accurately reflected.
To the above problem, the utility model provides a flue gas measuring device, as shown in FIG. 1, include:
an incinerator 1 configured to incinerate garbage to generate flue gas;
the sampling unit 2 is configured to perform multipoint sampling on the flue gas;
the mixing device 3 is communicated with the sampling unit 2 and is configured to mix multiple paths of flue gas obtained by multipoint sampling;
and the detection device 4 is arranged in the mixing device 3 and is configured to detect the temperature of the mixed flue gas.
The incinerator 1 is illustratively used for high temperature incineration of household waste, producing heat-carrying flue gas that is directed through a flue to a waste heat boiler (not shown). The flue is divided into three stages, namely a first flue, a second flue and a third flue, flue gas enters the waste heat boiler through the first flue, the second flue and the third flue in sequence, the second flue and the third flue are separated by a vertically downward water-cooled wall tube bundle partition wall, and the first flue is a flue with a rectangular section. In one embodiment, the first flue is an area with the incineration temperature more than or equal to 850 ℃ in the hearth.
Illustratively, the sampling unit 2 includes a sampler and a sampling pipe, and the sampler is installed at an end of the sampling pipe. In order to realize multipoint sampling of the flue gas, the sampling unit 2 comprises a plurality of samplers and a plurality of sampling pipelines, the samplers are distributed in the incinerator 1 to suck the flue gas, one ends of the sampling pipelines are the samplers, and the other ends of the sampling pipelines are communicated with the mixing device 3. In one embodiment, as shown in fig. 1, the plurality of samplers are respectively arranged on the bottom and/or the side wall of the first flue to perform multi-point sampling of the flue gas in the first flue.
Further, the outer sides of the sampler and the sampling pipeline are both provided with heat insulation layers.
Exemplarily, a mixing device 3 is in communication with the sampling unit 2, configured to mix the flue gas obtained by multipoint sampling. Specifically, the mixing device 3 is communicated with the end of the sampling pipeline, so that the multi-path flue gas sampled by the sampler from the first flue is collected in the mixing device 3 and is fully stirred and mixed.
Further, an insulating layer is arranged on the outer side of the mixing device 3.
Exemplarily, the utility model discloses a flue gas measuring device still includes filter equipment (not shown), filter equipment installs on the sampler to avoid particulate matter in the flue gas to get into in the sample pipeline.
Exemplarily, the utility model discloses a flue gas measuring device still includes blowback device 6, blowback device 6 with the sampling pipe communicates mutually, and it is right to configure to utilize compressed air the sampling pipe carries out the blowback, so that the sampling pipe keeps clean.
Further, the blowback device 6 further comprises a filter, optionally, the filter is arranged at the front end of the blowback device 6, and the compressed air is firstly filtered by the filter before entering the blowback device 6, so as to remove the particulate matters in the compressed air.
Further, the back-blowing device 6 is connected with the control unit, and the control unit controls the back-blowing device 6 to perform back-blowing ash removal operation.
Through set up filter equipment on the sampler, avoided during the particulate matter gets into sampling management, through setting up the blowback device again, utilize compressed air to carry out the blowback to the sample pipeline to make the sample pipeline keep clean, prolonged the life of sampler and sample pipeline.
Exemplarily, the detection device 4 is installed in the mixing device 3 and configured to detect the temperature of the mixed flue gas. The detection device 4 includes but is not limited to a thermocouple, the thermocouple includes a closed loop composed of two material conductors with different components, when temperature gradients exist at two ends, current passes through the loop, and electromotive force, namely thermoelectric potential, exists between the two ends, and further, when the thermocouple measures temperature, a measuring instrument can be connected to measure the thermoelectric potential, and then the temperature of a measured medium can be known.
In one embodiment, a thermocouple is located within the mixing device 3 to measure the temperature of the mixed flue gas and the measurement of the temperature of the mixed flue gas is read by an access meter located outside the mixing device 3.
Exemplarily, the utility model discloses a flue gas measuring device still includes circulating water cooling plant 5 and circulating fan 7, configures to and cools off the back with the mixed flue gas in mixing arrangement 3, will send into again through refrigerated mixed flue gas burn in the burning furnace 1.
Further, the circulating water cooling device 5 and the circulating fan 7 are connected with the control unit.
In one embodiment, the control unit controls the circulating water cooling device 5 to cool the mixed flue gas, so as to realize water cooling and further realize temperature control of the first flue region in the incinerator 1; the control unit controls the circulating fan 7 to send the cooled mixed flue gas into the incinerator 1 again, so that flue gas circulation is realized, and further, the flow speed control of the flue gas in the first flue is realized.
Exemplarily, the utility model discloses a flue gas measuring device still includes the control unit, configure to receive the temperature value that detection device 4 surveyed and generate control signal, so that the flue gas is in burn burning furnace 1 in the regional dwell time of 850 ℃ above at more than 2 seconds.
In one embodiment, the control unit comprises a Programmable Logic Controller (PLC) which receives the temperature values from the detection device 4 and then sends a signal to adjust the flow rate of the flue gas in the first flue. Specifically, when the measured temperature value is less than 850 ℃, the flow speed of the flue gas is slow, so that the residence time of the flue gas in the first flue is more than or equal to 2s (seconds) after the temperature of the flue gas is increased to more than or equal to 850 ℃; when the measured temperature value is more than or equal to 850 ℃, the flow speed of the flue gas is higher, so that the residence time of the flue gas in the first flue is more than or equal to 2s (seconds).
By enabling the residence time of the flue gas in the region with the temperature of more than 850 ℃ in the incinerator 1 to be more than 2 seconds, the sufficient decomposition of dioxin in the flue gas can be realized, the discharge amount of the dioxin is reduced, the atmospheric environment is protected, meanwhile, the requirements of the national standard GB18485-2014 'pollution control Standard for incineration of domestic garbage' are met, and the continuity and the accuracy of measurement are ensured.
Optionally, the utility model discloses a flue gas measuring device still includes alarm unit, configures to and receives control unit's signal is in order to send out the police dispatch newspaper to the operation of guarantee system is stable and reliable, reduces the maintenance work on scene simultaneously.
According to the utility model provides a flue gas measuring device carries out the multiple spot sample through the flue gas of sampling unit in to the incinerator, then mixes the multichannel flue gas in mixing arrangement to measure the temperature of mixing the flue gas, with the realization to direct, the accurate measurement of flue gas temperature
The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A flue gas measurement device, comprising:
an incinerator configured to incinerate the garbage to generate flue gas;
the sampling unit is configured to perform multipoint sampling on the smoke;
the mixing device is communicated with the sampling unit and is configured to mix the flue gas obtained by multipoint sampling;
and the detection device is arranged in the mixing device and is configured to detect the temperature of the mixed flue gas.
2. The flue gas measuring device according to claim 1, wherein the sampling unit comprises a sampler and a sampling pipe, the sampler being installed at an end of the sampling pipe, the sampler being disposed in the incinerator.
3. The flue gas measurement device of claim 2, further comprising:
and the filtering device is arranged on the sampler so as to prevent the particles in the flue gas from entering the sampling pipeline.
4. The flue gas measurement device of claim 2, further comprising:
and the back flushing device is communicated with the sampling pipeline and is configured to utilize compressed air to carry out back flushing on the sampling pipeline so as to keep the sampling pipeline clean.
5. The flue gas measurement device of claim 1, further comprising:
and the circulating water cooling device is connected with the mixing device and is configured to cool the mixed flue gas.
6. The flue gas measurement device of claim 5, further comprising:
and the circulating fan is arranged between the circulating water cooling device and the incinerator and is configured to send the cooled mixed flue gas into the incinerator again.
7. The smoke measuring apparatus of claim 1 wherein said sensing means comprises a thermocouple.
8. The flue gas measurement device of claim 1, further comprising:
and the control unit is configured to receive the temperature value measured by the detection device and generate a control signal so as to enable the residence time of the flue gas in an area with the temperature of above 850 ℃ in the incinerator to be above 2 seconds.
9. The flue gas measurement device of claim 8, wherein the control unit comprises a programmable logic controller.
10. The flue gas measuring device according to claim 1, wherein the sampling unit and the mixing device are provided with insulating layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921229877.2U CN210922870U (en) | 2019-07-31 | 2019-07-31 | Flue gas measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921229877.2U CN210922870U (en) | 2019-07-31 | 2019-07-31 | Flue gas measuring device |
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| CN210922870U true CN210922870U (en) | 2020-07-03 |
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| CN201921229877.2U Active CN210922870U (en) | 2019-07-31 | 2019-07-31 | Flue gas measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378712A (en) * | 2020-10-26 | 2021-02-19 | 江苏方天电力技术有限公司 | Flue gas mixing and sampling device |
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2019
- 2019-07-31 CN CN201921229877.2U patent/CN210922870U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378712A (en) * | 2020-10-26 | 2021-02-19 | 江苏方天电力技术有限公司 | Flue gas mixing and sampling device |
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