CN110823797A - High temperature resistant chimney online corrosion detecting system - Google Patents
High temperature resistant chimney online corrosion detecting system Download PDFInfo
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- CN110823797A CN110823797A CN201911274183.5A CN201911274183A CN110823797A CN 110823797 A CN110823797 A CN 110823797A CN 201911274183 A CN201911274183 A CN 201911274183A CN 110823797 A CN110823797 A CN 110823797A
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- 230000007797 corrosion Effects 0.000 title claims abstract description 59
- 238000005260 corrosion Methods 0.000 title claims abstract description 59
- 239000002184 metal Substances 0.000 claims abstract description 42
- 229910052751 metal Inorganic materials 0.000 claims abstract description 42
- 239000000523 sample Substances 0.000 claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 5
- 239000010439 graphite Substances 0.000 claims abstract description 5
- 238000009413 insulation Methods 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 15
- 239000003546 flue gas Substances 0.000 description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000006386 memory function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/04—Corrosion probes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Ecology (AREA)
- Biochemistry (AREA)
- Environmental Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a high-temperature-resistant chimney online corrosion detection system. The technical scheme of the invention is as follows: the corrosion detection device comprises a metal probe, a signal processor, a signal storage and a signal transmitter, wherein the metal probe penetrates through the chimney and extends into the chimney, the metal probe is a galvanic couple type detection probe and comprises a metal electrode and a graphite electrode, the metal electrode is made of the same material as the inner wall of the chimney, the signal processor is used for converting current data measured by the metal probe into corrosion rate, the signal storage stores the data measured by the metal probe in real time, the signal transmitter is used for communicating with the network cloud platform, and the network cloud platform is used for storing and comparing big data and can interact with the client. The scheme can effectively monitor the corrosion condition inside the chimney, constantly reflect the instant corrosion rate of the chimney, and effectively reflect the comprehensive corrosion amount and the service life of the chimney.
Description
Technical Field
The invention relates to the technical field of environment-friendly equipment, in particular to a high-temperature-resistant chimney online corrosion detection system.
Background
The chimney of the power plant mainly operates under the following three working conditions: 1) discharging flue gas which is not desulfurized, wherein the temperature of the flue gas entering a chimney is about 130 ℃. Under the condition, the inner wall of the chimney is in a dry state, the flue gas uniformly corrodes the inner wall material of the chimney in a gaseous state, and the corrosion condition is very slight. At this time, the chimney is a dry chimney; 2) and discharging the flue gas subjected to wet desulphurization, heating the flue gas by a GGH system, and allowing the temperature of the flue gas entering a chimney to be about 80 ℃ and slight condensation on the inner wall of the chimney to cause ash deposition on the inner side of the smoke discharging inner cylinder. The condensation state varies depending on the conditions such as the exhaust gas components. At this time, the chimney is a wet chimney; 3) and discharging the flue gas subjected to wet desulphurization, heating by a GGH-free system, and controlling the temperature of the flue gas entering a chimney to be about 40-50 ℃. The inner wall of the chimney has serious dewing, and the dewed acid liquid flows along the wall of the chimney. At this time, the chimney is a wet chimney.
However, with the requirements of environmental protection policies and enterprise decisions in recent years, most enterprises cancel bypasses and GGH systems, and power plant chimneys mainly use wet chimneys.
In a wet chimney, the moisture content in the flue gas is relatively high, the relative humidity of the flue gas is high, when a flue gas heat exchanger is not arranged, the temperature of the flue gas is usually between 45 and 50 ℃ and is far lower than the dew point temperature of sulfuric acid and sulfurous acid, the flue gas coming out of an absorption tower is close to a saturated state and quickly forms acid liquid drops in the chimney, meanwhile, dilute acid liquid mainly comprising sulfuric acid and sulfurous acid is condensed on the wall of the chimney, and the pH value is about 2.0. When the temperature of the low-concentration acid liquor is between 40 and 80 ℃, the flue gas has higher chemical corrosivity, namely, the flue gas with strong corrosivity can corrode the structural material by several times under the normal temperature condition.
Chimney maintenance is generally relatively difficult and infrequent due to the nature of the chimney closure and towering. Many domestic chimneys find internal corrosion only when the production is stopped for maintenance or after the chimneys are corroded and leaked. Once severe corrosion conditions occur, maintenance costs for the stack tend to be relatively high. Under the state of closed operation, the corrosion condition of the chimney is difficult to detect, and the potential safety risk of the chimney is greatly increased.
Disclosure of Invention
Aiming at the defects in the prior art, the invention mainly aims to provide the high-temperature-resistant online chimney corrosion detection system capable of effectively monitoring the corrosion condition inside a chimney.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a high temperature resistant chimney online corrosion detection system, includes chimney, corrosion detection device, network cloud platform and customer end, corrosion detection device includes metal probe, signal processor, signal memory and signal transmission ware, metal probe wears to establish the chimney and stretches into inside the chimney, metal probe is galvanic couple formula test probe, metal probe contains metal electrode and graphite electrode, metal electrode is the same with chimney inner wall material, signal processor is used for converting the current data that metal probe measured into corrosion rate, signal memory stores the data that metal probe measured in real time, signal transmission ware is used for communicating with network cloud platform, network cloud platform is used for the storage and the contrast of big data and can be interactive with the customer end.
Preferably, the signal processor, the signal storage and the signal transmitter are arranged in a detection box outside the chimney together.
Preferably, the chimney comprises a chimney body, the chimney body comprises an inner cylinder, an outer cylinder and a heat insulation layer arranged between the inner cylinder and the outer cylinder, the inner cylinder is connected with a sleeve, the metal probe is arranged in the sleeve, the metal probe penetrates through the inner cylinder and extends into the chimney body, and the sleeve is fixedly connected with the outer cylinder.
Preferably, the signal transmitter transmits the data to the network cloud platform in a 4G/5G/WIFI mode.
Preferably, the sleeve and the outer cylinder are connected by a screw thread or a fastening flange or a clamping hoop.
Compared with the prior art, the invention has the advantages that the corrosion condition in the chimney can be effectively monitored, the instant corrosion rate of the chimney can be reflected all the time, and the comprehensive corrosion amount and the service life of the chimney can be effectively reflected. The system can also be combined with other parameters to analyze the reasons caused by corrosion, and provide reasonable suggestions for reducing the corrosion of the chimney. The manufacturing material of the probe is similar to or the same as that of the inner cylinder, so that the accuracy of corrosion can be effectively reflected. The signal transmitter transmits the data to the network cloud platform in a 4G/5G/WIFI mode. The system is simple and convenient to install, can realize that one set of system is taken immediately and is used, and realizes the purpose of multi-section measurement.
Drawings
FIG. 1 is a system framework diagram of an online corrosion detection system for a high temperature resistant chimney according to the present invention.
Fig. 2 is a schematic structural diagram of the high-temperature-resistant chimney online corrosion detection system of the present invention.
In the figure: 1. a chimney; 2. an inner barrel; 3. a heat-insulating layer; 4. an outer cylinder; 5. a sleeve; 6. a metal probe; 7. a signal processor; 8. a transmission line; 9. a signal storage; 10. a signal transmitter; 11. a detection box; 12. a corrosion detection device; 13. a network cloud platform; 14. and (4) a client.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1, an online corrosion detection system for a high temperature resistant chimney includes a chimney 1, a corrosion detection device 12, a network cloud platform 13 and a client 14, the corrosion detection device 12 comprises a metal probe 6, a signal processor 7, a signal storage 9 and a signal transmitter 10, the metal probe 6 penetrates through the chimney 1 and extends into the chimney 1, the metal probe 6 is a galvanic couple type detection probe, the metal probe 6 comprises a metal electrode and a graphite electrode, the material of the metal electrode is the same as that of the inner wall of the chimney 1, the signal processor 7 is used for converting the current data measured by the metal probe 6 into corrosion rate, the signal storage 9 stores data measured by the metal probe 6 in real time, the signal transmitter 10 is used for communicating with a network cloud platform 13, the network cloud platform 13 is used for storing and comparing big data and can interact with the client 14.
The high-temperature-resistant chimney 1 online corrosion detection system can effectively monitor the corrosion condition inside the chimney 1, reflect the instant corrosion rate of the chimney 1 at any time, and effectively reflect the comprehensive corrosion amount and service life of the chimney 1. The detection principle is that a galvanic couple type detection probe is inserted into a chimney 1, different metals are contacted with each other or communicated through other conductors due to different corrosion potentials and are in the same medium, so that local corrosion of the contact part of the different metals is caused, and the galvanic couple corrosion is also called contact corrosion or bimetal corrosion. By monitoring the current between the set cathode and anode electrodes, namely the current between the metal electrode and the graphite electrode in the scheme, the corrosion condition of the metal electrode is reflected by the change of the current because the material of the metal electrode is the same as that of the inner wall of the chimney 1, and then the corrosion speed of the inner wall of the chimney 1 can be converted.
After the collected current signals are converted into corrosion rates, the total corrosion amount can be accumulated, and the signal processor 7 can also give a suggested service life according to the preset wall thickness of the chimney 1. The signal processor 7 sets an upper limit of corrosion amount alarm and an upper limit of corrosion rate alarm, and once one of the two exceeds the standard, the signal processor 7 can give a corresponding alarm signal. The signal processor 7, the signal storage 9 and the signal transmitter 10 all adopt a single chip integrated chip in the prior art.
The system can also be combined with other parameters to analyze the cause of corrosion, and provides reasonable suggestions for reducing the corrosion of the chimney 1. The manufacturing material of the probe is similar to or the same as that of the inner cylinder, so that the accuracy of corrosion can be effectively reflected. The communication unit can transmit data to the data center through WIFI or 5G technology. The system is simple and convenient to install, can realize that one set of system is taken immediately and is used, and realizes the purpose of multi-section measurement. The signal memory 9 has a breakpoint memory function, a large storage capacity and a large storage stability, and can effectively protect the safety of the collected data. The network cloud platform 13 can store and compare data, and send out an analysis report according to the stored data, thereby realizing effective interaction between the corrosion detection apparatus 12 and a user.
Preferably, the signal processor 7, the signal storage 9 and the signal transmitter 10 are arranged together in a detection box 11 outside the chimney 1. Can protect equipment safety in a limited way and avoid the corrosion of illumination, rainwater and the like.
Preferably, the chimney 1 comprises a chimney body, the chimney body comprises an inner cylinder 2, an outer cylinder 4 and a heat insulation layer 3 arranged between the inner cylinder 2 and the outer cylinder 4, the inner cylinder 2 is connected with a sleeve 5, the metal probe 6 is arranged in the sleeve 5, the metal probe 6 penetrates through the inner cylinder 2 and extends into the chimney 1 body, and the sleeve 5 is fixedly connected with the outer cylinder 4.
Preferably, the signal transmitter 10 transmits the data to the network cloud platform 13 in a 4G/5G/WIFI manner. The signal transmitter 10 has a detection function, and once the signal transmission is unsuccessful, the data can be timely returned to the value signal storage 9, so that the data can not be lost.
Preferably, the sleeve 5 is screwed to the outer cylinder 4 or is connected by a fastening flange or by a clamping connection. Any connection means may be used as long as the sleeve 5 and the outer cylinder 4 can be effectively connected and the sealing property can be ensured.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (5)
1. The utility model provides a high temperature resistant chimney online corrosion detecting system which characterized in that: the corrosion detection device comprises a metal probe, a signal processor, a signal storage and a signal transmitter, wherein the metal probe penetrates through the chimney and extends into the chimney, the metal probe is a galvanic couple type detection probe and comprises a metal electrode and a graphite electrode, the metal electrode is made of the same material as the inner wall of the chimney, the signal processor is used for converting current data measured by the metal probe into corrosion rate, the signal storage stores the data measured by the metal probe in real time, the signal transmitter is used for communicating with the network cloud platform, and the network cloud platform is used for storing and comparing big data and can interact with the client.
2. The high-temperature-resistant chimney online corrosion detection system according to claim 1, characterized in that: the signal processor, the signal storage and the signal transmitter are arranged in a detection box outside the chimney together.
3. The high-temperature-resistant chimney online corrosion detection system according to claim 1, characterized in that: the chimney comprises a chimney body, the chimney body comprises an inner barrel, an outer barrel and a heat insulation layer arranged between the inner barrel and the outer barrel, the inner barrel is connected with a sleeve, the metal probe is arranged in the sleeve, the metal probe penetrates through the inner barrel and extends into the chimney body, and the sleeve is fixedly connected with the outer barrel.
4. The high-temperature-resistant chimney online corrosion detection system according to claim 1, characterized in that: the signal transmitter transmits data to the network cloud platform in a 4G/5G/WIFI mode.
5. The high-temperature-resistant chimney online corrosion detection system according to claim 1, characterized in that: the sleeve and the outer cylinder are in threaded connection or connected through a fastening flange or connected through a clamping hoop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911274183.5A CN110823797A (en) | 2019-12-12 | 2019-12-12 | High temperature resistant chimney online corrosion detecting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911274183.5A CN110823797A (en) | 2019-12-12 | 2019-12-12 | High temperature resistant chimney online corrosion detecting system |
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| Publication Number | Publication Date |
|---|---|
| CN110823797A true CN110823797A (en) | 2020-02-21 |
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| CN201911274183.5A Pending CN110823797A (en) | 2019-12-12 | 2019-12-12 | High temperature resistant chimney online corrosion detecting system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082928A (en) * | 2020-09-11 | 2020-12-15 | 上海康恒环境股份有限公司 | High-temperature corrosion detection system for flue gas of waste incinerator |
| CN113092355A (en) * | 2021-04-06 | 2021-07-09 | 上海建冶科技股份有限公司 | Detection apparatus for real-time detection metal corrosion rate |
| CN113295601A (en) * | 2021-05-13 | 2021-08-24 | 上海长肯试验设备有限公司 | Corrosion testing machine for chimney pipeline |
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| CN203772703U (en) * | 2014-04-04 | 2014-08-13 | 清华大学 | Steel chimney corrosion monitoring system based on non-contact type ultrasonic technology |
| JP2015180856A (en) * | 2014-03-06 | 2015-10-15 | 株式会社神戸製鋼所 | Corrosion monitoring sensor, corrosion depth calculation system, and metal corrosion speed calculation system |
| CN105181568A (en) * | 2015-09-28 | 2015-12-23 | 武汉科思特仪器有限公司 | Device for monitoring corrosion of oil and gas field gathering pipelines and corrosion inhibitor filling system |
| CN206016408U (en) * | 2016-08-23 | 2017-03-15 | 上海辰鸣电力工程有限公司 | A kind of corrosion-resistant antiseep flue gas inspection hole |
| CN206440698U (en) * | 2017-02-13 | 2017-08-25 | 宁夏京能宁东发电有限责任公司 | A kind of power plant desulfurization chimney anticorrosion layer monitoring device and pressure-tight box sensor |
| CN206990408U (en) * | 2017-06-28 | 2018-02-09 | 郑州科源耐磨防腐工程有限公司 | A kind of Titanium board chimney internal cylinder on-line corrosion monitoring system |
| CN211785021U (en) * | 2019-12-12 | 2020-10-27 | 苏州云白环境设备股份有限公司 | High temperature resistant chimney online corrosion detecting system |
-
2019
- 2019-12-12 CN CN201911274183.5A patent/CN110823797A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018299A (en) * | 2012-12-07 | 2013-04-03 | 山东电力集团公司电力科学研究院 | Couple corrosion sensor |
| JP2015180856A (en) * | 2014-03-06 | 2015-10-15 | 株式会社神戸製鋼所 | Corrosion monitoring sensor, corrosion depth calculation system, and metal corrosion speed calculation system |
| CN203772703U (en) * | 2014-04-04 | 2014-08-13 | 清华大学 | Steel chimney corrosion monitoring system based on non-contact type ultrasonic technology |
| CN105181568A (en) * | 2015-09-28 | 2015-12-23 | 武汉科思特仪器有限公司 | Device for monitoring corrosion of oil and gas field gathering pipelines and corrosion inhibitor filling system |
| CN206016408U (en) * | 2016-08-23 | 2017-03-15 | 上海辰鸣电力工程有限公司 | A kind of corrosion-resistant antiseep flue gas inspection hole |
| CN206440698U (en) * | 2017-02-13 | 2017-08-25 | 宁夏京能宁东发电有限责任公司 | A kind of power plant desulfurization chimney anticorrosion layer monitoring device and pressure-tight box sensor |
| CN206990408U (en) * | 2017-06-28 | 2018-02-09 | 郑州科源耐磨防腐工程有限公司 | A kind of Titanium board chimney internal cylinder on-line corrosion monitoring system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082928A (en) * | 2020-09-11 | 2020-12-15 | 上海康恒环境股份有限公司 | High-temperature corrosion detection system for flue gas of waste incinerator |
| CN113092355A (en) * | 2021-04-06 | 2021-07-09 | 上海建冶科技股份有限公司 | Detection apparatus for real-time detection metal corrosion rate |
| CN113295601A (en) * | 2021-05-13 | 2021-08-24 | 上海长肯试验设备有限公司 | Corrosion testing machine for chimney pipeline |
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