CN107543842B - High-temperature flue gas wet bulb temperature measuring device - Google Patents
High-temperature flue gas wet bulb temperature measuring device Download PDFInfo
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- CN107543842B CN107543842B CN201710982694.7A CN201710982694A CN107543842B CN 107543842 B CN107543842 B CN 107543842B CN 201710982694 A CN201710982694 A CN 201710982694A CN 107543842 B CN107543842 B CN 107543842B
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- water
- wet bulb
- flue gas
- thermometer
- temperature
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000003546 flue gas Substances 0.000 title claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 117
- 239000011358 absorbing material Substances 0.000 claims abstract description 25
- 238000009736 wetting Methods 0.000 claims abstract description 4
- 239000004744 fabric Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000009529 body temperature measurement Methods 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 5
- 239000012774 insulation material Substances 0.000 claims description 5
- 229920000742 Cotton Polymers 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention relates to the technical field of wet bulb temperature measuring devices, and provides a high-temperature flue gas wet bulb temperature measuring device which is used for measuring the wet bulb temperature in a high-temperature flue gas pipeline and comprises the following components: the thermometer is provided with a temperature sensing end, and the outer surface of the temperature sensing end is wrapped by a water absorbing material; one end of the water supply pipeline is provided with a water storage container; the water distribution pipeline is communicated with the other end of the water supply pipeline and is used for uniformly distributing water to the temperature sensing end so as to enable the water absorbing material to be in a wet state; the water distribution pipeline is an annular pipe with a plurality of water outlets on the pipe wall, the annular pipe is connected with the water supply pipeline through a water pipe, and the annular pipe is sequentially sleeved on the outer surface of the water absorbing material or positioned in the water absorbing material along the length direction of the thermometer. The invention overcomes the defect that the moisture in the gauze of the traditional wet bulb thermometer is easy to evaporate, ensures that the water distribution pipe has continuous water source supply and ensures that the water absorbing material is in a good wetting state, and can accurately measure the wet bulb temperature in the high-temperature flue gas pipeline.
Description
Technical Field
The invention relates to the technical field of wet bulb temperature measuring devices, in particular to a high-temperature flue gas wet bulb temperature measuring device.
Background
Wet bulb temperature is one means of calibrating the relative humidity of air, and is one of the important design parameters in the fields of heating ventilation and chemical industry. The meaning of the wet bulb temperature is that the air in a certain state is contacted with a wet bulb of a wet bulb thermometer to generate adiabatic heat-moisture exchange so as to reach the temperature when the wet bulb thermometer is saturated. The temperature is measured by using a thermometer with wet gauze wrapped on a thermometer bulb, and in air with the flow rate of more than 2.5m/s and without direct radiation, the measured surface temperature of the gauze is taken as a measure of the near saturation degree of the air. The greater the saturation difference of the surrounding air, the stronger the evaporation of the wet gauze on the wet bulb thermometer, and the lower its humidity. Based on the difference in dry and wet bulb temperatures, the relative humidity of the air can be determined.
The application working environment temperature of the existing wet bulb thermometer is generally not more than 50 ℃, if the wet bulb thermometer is used in an environment higher than the temperature, water on the gauze or the surface of the cotton cloth of the wet bulb thermometer is very easy to evaporate, and a subsequent water source cannot well moisten the gauze, so that larger measurement errors are often caused. Especially in some industrial fields, such as natural gas combustion furnaces, the wet bulb temperature of the flue gas discharged from the furnace chamber can reach 50-90 ℃, the measurement error of a conventional wet bulb thermometer is large, and the wet bulb temperature of the high-temperature flue gas cannot be accurately measured.
Disclosure of Invention
In order to overcome the defect of large measurement error caused by the fact that moisture of gauze of the traditional wet bulb thermometer is easily evaporated in a high-temperature flue gas environment, the invention aims to provide the high-temperature flue gas wet bulb temperature measuring device which can accurately measure the wet bulb temperature in a high-temperature flue gas pipeline.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a high-temperature flue gas wet bulb temperature measuring device, which is used for measuring the wet bulb temperature in a high-temperature flue gas pipeline and is characterized by comprising the following components: the thermometer is provided with a temperature sensing end, and the outer surface of the temperature sensing end is wrapped by a water absorbing material; one end of the water supply pipeline is provided with a water storage container; and at least one water distribution pipeline communicated with the other end of the water supply pipeline and used for uniformly distributing water to the temperature sensing end so as to enable the water absorbing material to be in a wet state.
The high-temperature flue gas wet bulb temperature measuring device provided by the invention can also have the following characteristics: further comprises: and the mounting seat is used for mounting the thermometer and the water supply pipeline on the high-temperature flue gas pipeline.
The high-temperature flue gas wet bulb temperature measuring device provided by the invention can also have the following characteristics: wherein, be provided with two perforation on the mount pad, be used for installing thermometer and feed water pipe respectively.
The high-temperature flue gas wet bulb temperature measuring device provided by the invention can also have the following characteristics: the part of the thermometer, which is positioned between the temperature sensing end and the mounting seat, is also sleeved with a protective pipe, and the protective pipe is made of heat insulation materials.
The high-temperature flue gas wet bulb temperature measuring device provided by the invention can also have the following characteristics: the water distribution pipeline is an annular pipe with a plurality of water outlets uniformly arranged on the pipe wall, the annular pipe is connected with the water supply pipeline through a water pipe, and the annular pipe is sequentially sleeved on the outer surface of the water absorption material along the length direction of the thermometer or sequentially sleeved outside the temperature sensing end and positioned in the water absorption material.
The high-temperature flue gas wet bulb temperature measuring device provided by the invention can also have the following characteristics: wherein, the annular tube and the water delivery tube are capillary tubes.
The high-temperature flue gas wet bulb temperature measuring device provided by the invention can also have the following characteristics: wherein the capillary tube is a tube made of a heat insulating material.
The high-temperature flue gas wet bulb temperature measuring device provided by the invention can also have the following characteristics: wherein the water supply pipeline is a pipe made of heat insulating material.
The high-temperature flue gas wet bulb temperature measuring device provided by the invention can also have the following characteristics: and the water supply pipeline is also provided with a flow regulating valve for regulating the water flow in the water supply pipeline.
The high-temperature flue gas wet bulb temperature measuring device provided by the invention can also have the following characteristics: wherein the water absorbing material is gauze or tubular fabric made of cotton fiber.
The actions and effects of the invention
According to the high-temperature flue gas wet bulb temperature measuring device, the water storage container is arranged at one end of the water supply pipeline, and the water distribution pipeline is communicated with the other end of the water supply pipeline, so that the water distribution pipeline can be ensured to have continuous water supply to continuously distribute water-absorbing materials at the temperature sensing end of the thermometer, the water-absorbing materials are always in a wet state, the defect that moisture in gauze of the conventional wet bulb thermometer is easy to evaporate in a high-temperature environment is effectively overcome, and the wet bulb temperature in the high-temperature flue gas pipeline can be accurately measured.
Drawings
FIG. 1 is a schematic diagram of a high temperature flue gas wet bulb temperature measurement device in an embodiment of the present invention; and
fig. 2 is an enlarged schematic view of a portion of fig. 1 in detail.
Detailed Description
The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.
FIG. 1 is a schematic diagram of a high temperature flue gas wet bulb temperature measurement device in an embodiment of the present invention; fig. 2 is an enlarged schematic view of a portion of fig. 1 in detail.
As shown in fig. 1 and 2, the high-temperature flue gas wet bulb temperature measuring device in this embodiment is used for measuring wet bulb temperature in a high-temperature flue gas pipeline, and includes a mounting seat 8, a thermometer 2, a water supply pipeline 7 and a plurality of water distribution pipelines 5.
As shown in fig. 1, the mounting seat 8 is used for mounting the thermometer 2 and the water supply pipe 7 on a high-temperature flue gas pipe, and two through holes (not shown in the figure) for respectively mounting the thermometer 2 and the water supply pipe 7 are formed in the mounting seat. In this embodiment, the mounting seat 8 is a flange, and its size corresponds to the size of the opening of the high-temperature flue gas duct.
As shown in fig. 1 and 2, the thermometer 2 is installed on the mounting seat 8 in a penetrating manner, and is used for measuring the ambient temperature. The thermometer 2 has a temperature sensing end, and the outer surface of the temperature sensing end is wrapped with a water absorbing material 4.
In this embodiment, the water absorbent material 4 is gauze or tubular fabric made of cotton fibers having good water absorbency. When gauze is selected as the water absorbing material 4, the water absorbing material is wrapped on the outer surface of the temperature sensing end of the thermometer 2 in a winding mode; when the water absorbing material 4 is a tubular fabric, the tubular fabric is sleeved on the temperature sensing end of the thermometer 2, and the installation and the operation are convenient.
In this embodiment, the portion of the thermometer 2 located between the temperature sensing end and the mounting seat 8 is further sleeved with the protection tube 3, and the protection tube 3 is made of an insulating material, so that measurement errors caused by the fact that heat in high-temperature flue gas is conducted to the temperature sensing end due to the axial heat conduction effect of the side wall of the thermometer 2 can be effectively eliminated.
As shown in fig. 1 and 2, the water supply pipe 7 is arranged on the mounting seat 8 in a penetrating way, one end of the water supply pipe is provided with the water storage container 1, and the other end of the water supply pipe is communicated with the water distribution pipe 5 and is used for providing continuous water source supply for the water distribution pipe 5. The water supply pipeline 7 is also provided with a flow regulating valve 9 for regulating the water flow in the water supply pipeline 7.
In the present embodiment, the water supply pipe 7 is made of a heat insulating material, so that measurement errors caused by heat conduction between high-temperature flue gas and water in the water supply pipe 7 can be effectively eliminated.
As shown in fig. 1 and 2, the water distribution pipe 5 is communicated with the other end of the water supply pipe 7, and is used for uniformly distributing water to the temperature sensing end of the thermometer 2 so as to enable the water absorbing material 4 on the outer surface of the temperature sensing end to be in a wet state.
The water distribution pipeline 5 is an annular pipe with a plurality of water outlet holes 10 arranged on the pipe wall, each annular pipe is connected with the water supply pipeline 7 through a water pipe 6, and the plurality of annular pipes are sequentially sleeved on the outer surface of the water absorbing material 4 along the length direction of the thermometer 2, so that the water absorbing material 4 can be ensured to be in a good wetting state. In addition, the plurality of annular tubes may be sequentially sleeved outside the temperature sensing end of the thermometer 2 along the length direction of the thermometer 2 and positioned in the water absorbing material 4, for example, at least one layer of gauze is wound on the outer surface of the temperature sensing end, then the annular tubes are installed, and finally, the gauze is wound again to wrap the annular tubes.
The annular tube and the water delivery tube 4 are capillary tubes, and have good wicking effect. In the embodiment, the capillary tube is made of heat insulation materials, so that measurement errors caused by heat conduction between high-temperature flue gas and water in the capillary tube can be effectively eliminated.
Example operation and Effect
According to the high-temperature flue gas wet bulb temperature measuring device, as the water storage container is arranged at one end of the water supply pipeline, the water distribution pipeline is communicated with the other end of the water supply pipeline, and continuous water supply of the water distribution pipeline can be ensured to be carried out on the water absorbing material at the temperature sensing end of the thermometer, so that the water absorbing material is always in a wet state, the defect that moisture in gauze of the conventional wet bulb thermometer is easy to evaporate in a high-temperature environment is effectively overcome, and the wet bulb temperature in the high-temperature flue gas pipeline can be accurately measured.
In addition, the water distribution pipeline is an annular pipe with a plurality of water outlets arranged on the pipe wall, and the annular pipe is sequentially sleeved on the outer surface of the water absorption material of the temperature sensing end along the length direction of the thermometer or sequentially sleeved outside the temperature sensing end and positioned in the water absorption material, so that uniform water distribution of the water absorption material can be ensured, and the water absorption material is in a good wetting state.
In addition, the part of the water supply pipeline between the temperature sensing end and the mounting seat is sleeved with the protective pipe made of the heat insulation material, so that measurement errors caused by the fact that heat in high-temperature flue gas is conducted to the temperature sensing end under the axial heat conduction effect of the side wall of the thermometer can be effectively eliminated.
Claims (3)
1. A high temperature flue gas wet bulb temperature measurement device for measure the wet bulb temperature in the high temperature flue gas pipeline, characterized in that includes:
the thermometer is provided with a temperature sensing end, and the outer surface of the temperature sensing end is wrapped by a water absorbing material;
a water supply pipe made of heat insulating material and provided with a water storage container at one end; and
the water distribution pipeline is communicated with the other end of the water supply pipeline and is used for uniformly distributing water to the temperature sensing end so as to enable the water absorbing material to be in a wetting state; and
the installation seat is used for installing the thermometer and the water supply pipeline on the high-temperature flue gas pipeline, and is provided with two through holes for installing the thermometer and the water supply pipeline respectively;
wherein the water distribution pipeline is an annular pipe with a plurality of water outlets on the pipe wall,
the annular pipe is connected with the water supply pipeline through a water pipe,
the annular tube is sleeved on the outer surface of the water absorbing material along the length direction of the thermometer in sequence, or sleeved on the outer part of the temperature sensing end in sequence and positioned in the water absorbing material,
the annular pipe and the water delivery pipe are capillary pipes made of heat insulation materials;
the part of the thermometer, which is positioned between the temperature sensing end and the mounting seat, is also sleeved with a protective tube made of heat insulation materials.
2. The high temperature flue gas wet bulb temperature measurement device of claim 1, wherein:
and the water supply pipeline is also provided with a flow regulating valve for regulating the water flow in the water supply pipeline.
3. The high temperature flue gas wet bulb temperature measurement device of claim 1, wherein:
wherein the water absorbing material is gauze or tubular fabric made of cotton fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710982694.7A CN107543842B (en) | 2017-10-20 | 2017-10-20 | High-temperature flue gas wet bulb temperature measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710982694.7A CN107543842B (en) | 2017-10-20 | 2017-10-20 | High-temperature flue gas wet bulb temperature measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN107543842A CN107543842A (en) | 2018-01-05 |
| CN107543842B true CN107543842B (en) | 2024-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710982694.7A Active CN107543842B (en) | 2017-10-20 | 2017-10-20 | High-temperature flue gas wet bulb temperature measuring device |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113791119A (en) * | 2021-10-14 | 2021-12-14 | 云南省烟草农业科学研究院 | Bulk curer dry-wet bulb temperature sensor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5460041A (en) * | 1993-11-08 | 1995-10-24 | Electric Power Research Institute, Inc. | Apparatus and method for continuous measurement of the wet bulb temperature of a flue gas stream |
| US5520048A (en) * | 1995-01-19 | 1996-05-28 | United Sciences, Inc. | Automated flow measuring device including wet and dry bulb moisture analyzer |
| CN203422334U (en) * | 2013-08-30 | 2014-02-05 | 广州赛宝计量检测中心服务有限公司 | Standard aspirated psychrometer |
| CN207472813U (en) * | 2017-10-20 | 2018-06-08 | 上海理工大学 | High-temperature flue gas wet bulb temperature measuring device |
-
2017
- 2017-10-20 CN CN201710982694.7A patent/CN107543842B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5460041A (en) * | 1993-11-08 | 1995-10-24 | Electric Power Research Institute, Inc. | Apparatus and method for continuous measurement of the wet bulb temperature of a flue gas stream |
| US5520048A (en) * | 1995-01-19 | 1996-05-28 | United Sciences, Inc. | Automated flow measuring device including wet and dry bulb moisture analyzer |
| CN203422334U (en) * | 2013-08-30 | 2014-02-05 | 广州赛宝计量检测中心服务有限公司 | Standard aspirated psychrometer |
| CN207472813U (en) * | 2017-10-20 | 2018-06-08 | 上海理工大学 | High-temperature flue gas wet bulb temperature measuring device |
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| CN107543842A (en) | 2018-01-05 |
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