CN211785021U

CN211785021U - High temperature resistant chimney online corrosion detecting system

Info

Publication number: CN211785021U
Application number: CN201922229707.0U
Authority: CN
Inventors: 王泳; 蔡云龙; 刘枫; 李娜
Original assignee: Suzhou Rainbow Environmental Equipment Co ltd
Current assignee: Suzhou Rainbow Environmental Equipment Co ltd
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-10-27
Anticipated expiration: 2029-12-12

Abstract

The utility model discloses a high temperature resistant chimney online corrosion detection system. The technical scheme of the utility model is 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. 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

High temperature resistant chimney online corrosion detecting system

Technical Field

The utility model relates to an environmental protection equipment technical field, in particular to high temperature resistant chimney online corrosion detecting 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.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model discloses a main aim at provides a high temperature resistant chimney online corrosion detection system that can effectively monitor the inside corruption condition of chimney.

In order to achieve the above purpose, the utility model provides a 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.

The utility model discloses have following advantage for prior art, can effectively monitor the inside corruption condition of chimney, the instant corrosion rate of reacting the chimney often also can react chimney comprehensive corrosion volume and service life effectively. 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 frame diagram of the high temperature resistant chimney on-line corrosion detecting system of the present invention.

Fig. 2 is a schematic structural diagram of the high temperature resistant chimney on-line 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 present invention will be further explained with reference to the accompanying 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.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

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 3, 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.