CN214501256U - High-temperature corrosion detection system for flue gas of waste incinerator - Google Patents
High-temperature corrosion detection system for flue gas of waste incinerator Download PDFInfo
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- CN214501256U CN214501256U CN202021986673.6U CN202021986673U CN214501256U CN 214501256 U CN214501256 U CN 214501256U CN 202021986673 U CN202021986673 U CN 202021986673U CN 214501256 U CN214501256 U CN 214501256U
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Abstract
The utility model relates to a waste incinerator flue gas high temperature corrosion detecting system, including cooling air pipe-line system, accuse temperature corrosion tube subassembly and outer wall temperature control system. Wherein, cooling air pipe-line system includes: compressed air pipe, manual ball valve, filtration surge damping valve, electric control valve, manual governing valve and metal collapsible tube. The temperature-controlled corrosion tube assembly comprises: the device comprises a connecting flange, a flange base, a corrosion sample pipe, a thread pressing end cover, an outer pipe and an inner pipe. The outer wall temperature control system includes: a wall temperature thermocouple and a control storage unit. The utility model discloses can solve the performance research of present different anticorrosive techniques on scene can not guarantee contrastive analysis's technical problem in same flue gas atmosphere, carry out the life-span prediction of perishable water-cooling wall and over heater equipment in the boiler under the different parameters. And then can rationally select the anticorrosion technique, have important meaning to the design and the safe operation of boiler.
Description
Technical Field
The utility model relates to a high temperature corrosion test device in the municipal solid waste incineration field specifically indicates a waste incinerator flue gas high temperature corrosion detecting system.
Background
In recent years, along with the development of national economy, the improvement of environmental requirements and the reduction of subsidies of garbage disposal, the main approach of a garbage incineration power plant is to improve working medium operation parameters in order to improve the garbage disposal capacity and the unit garbage power generation capacity. However, the high-parameter boiler has serious corrosion on the heating surface, high requirements on maintenance and system materials and increased probability of unplanned shutdown. How to effectively prevent corrosion of a high-temperature heating surface is an important subject of long-period stable operation of the existing garbage incinerator and an important development direction of the future optimal design of the garbage incinerator. The reliable anticorrosion technique for heated surface includes anticorrosion coating and high-alloy pipe. At present, the high-temperature corrosion performance of the corrosion prevention technology is mainly researched through a small electric heating tube type furnace, and the high-temperature corrosion performance research in the operation site of the garbage incinerator is more accurate. In the past, the research of field anticorrosion technology verification mostly adopts a hanging piece dry burning mode, and the performance research of different anticorrosion technologies can not be guaranteed to be carried out in the same smoke atmosphere, so that the comparative analysis reference is lost. Meanwhile, the problem that the real furnace verification process of the anticorrosion technology and the operation of the garbage furnace cannot be decoupled exists.
SUMMERY OF THE UTILITY MODEL
The utility model provides a pair of msw incineration stove flue gas high temperature corrosion detecting system to complexity and inaccuracy that present scene anticorrosion technique verified, provides one kind and need not destroy boiler flue, simple and convenient, accurate and do not influence the flue gas high temperature corrosion detecting system of msw furnace normal operating.
The utility model provides a high temperature corrosion detection system for flue gas of a garbage incinerator, which comprises a cooling air pipeline system, a temperature control corrosion pipe assembly and an outer wall temperature control system; the cooling air pipeline system comprises a compressed air pipe, a manual ball valve, a filtering pressure stabilizing valve, an electric regulating valve, a manual regulating valve and a metal hose; the temperature control corrosion pipe assembly comprises a connecting flange, a flange base, a corrosion sample pipe, a thread pressing end cover, an outer pipe and an inner pipe; the outer wall temperature control system comprises a wall temperature thermocouple and a control storage unit;
the temperature control corrosion pipe assembly corrosion sample pipe is arranged on the water-cooling wall of the garbage incinerator through a connecting flange; the connecting flange is arranged on the flange base, an insulating ceramic gasket is arranged between every two adjacent corrosion sample tubes, and the insulating ceramic gasket is fixed on the outer tube through a compression end cover;
the compressed air pipeline is connected with an inner pipe of the temperature-control corrosion pipe assembly through a connected metal hose, is connected through a small hole at the front end of the inner pipe and cools a corrosion sample pipe;
the cooling air in the cooling air pipeline system comes from a compressed air pipe and then is divided into two branches: the main branch is an inner pipe through which cooling air enters the temperature-control corrosion pipe assembly through a manual ball valve, a filtering pressure-stabilizing valve and an electric regulating valve; the auxiliary branch is an inner pipe through which cooling air enters the temperature-control corrosion pipe assembly through a manual ball valve, a filtering pressure-stabilizing valve and a manual regulating valve, and the cooling air of the auxiliary branch plays a role of low-flow cooling protection air of the temperature-control corrosion pipe assembly when a fault occurs;
the temperature-controlled corrosion tube assembly is characterized in that a corrosion sample tube is prepared by an anticorrosion technology needing furnace verification, and cooling air is released to the inner wall area of the corrosion sample tube through a small hole in the front of an inner tube, so that the temperature-controlled corrosion tube assembly is different from the conventional hanging piece dry burning mode; the cooled air is released into the flue through the small holes on the wall surface of the outer pipe, and heat pollution to the environment is avoided; meanwhile, the temperature control corrosion pipe assembly is conveniently arranged on the water-cooling wall of the garbage incinerator through a connecting flange;
the outer wall temperature control system is characterized in that a wall temperature thermocouple is arranged on the outer wall surface of the corrosion sample tube, the temperature of the outer wall of the corrosion sample tube is monitored under high-temperature corrosion of flue gas, meanwhile, a temperature signal is transmitted into a control storage unit to store an actual measurement value and compare the actual measurement value with a design value, and the opening degree of an electric regulating valve is adjusted in a feedback mode, so that the temperature of the outer wall is stabilized within a certain range.
Furthermore, the cooling air pipeline system is derived from a compressed air pipe, the pressure of the compressed air is 0.2 Mpa-0.7 Mpa, and the flow of the cooling air is 0.5m3/h～25m3/h。
Furthermore, the cooling air main branch is used for adjusting the flow of cooling air and controlling the measured value of the outer wall temperature to be stabilized near the design value; and the cooling air auxiliary branch is used for cooling protective air with small flow for corroding the sample tube when a fault occurs.
Furthermore, the number of the corrosion sample tubes in the temperature control corrosion tube assembly is 2-6, and the gaskets between every two adjacent corrosion sample tubes are insulating ceramic gaskets. The outer diameter of each corrosion sample pipe is 42-60 mm, and the length of each single corrosion sample pipe is 10-30 mm.
Furthermore, the corrosion sample tubes are fixed on the outer tube through the thread pressing end covers, and cooling air released by the small holes in the front of the inner tube cools each corrosion sample tube simultaneously.
Furthermore, the total length of the temperature control corrosion tube assembly is 1000 mm-1800 mm, and the length of the temperature control corrosion tube assembly extending into the flue is 800 mm-1600 mm.
Furthermore, the cooling air pipeline system is connected with the temperature control corrosion pipe assembly through a metal hose.
Furthermore, the design value of the wall temperature thermocouple in the outer wall temperature control system is 350-550 ℃, the flow rate of cooling air is controlled by electrically adjusting the opening degree of a door, and the fluctuation of the measured value of the wall temperature thermocouple is 5-25 ℃.
Further, the temperature control system stores the design value of the wall temperature, the measured value of the wall temperature and the opening value of the electric adjusting door at the time interval of 0.5-2 min.
The technical effects are as follows:
the utility model discloses msw incineration furnace flue gas high temperature corrosion detecting system, including cooling air pipe-line system, accuse temperature corrosion tube subassembly and outer wall temperature control system. Compressed air pipeline provides compressed air for cooling air pipe system, and through the metal collapsible tube of connecting, the cooling air gets into the inner tube of accuse temperature corruption pipe subassembly, cools off through the aperture of inner tube front end to corroding the sample pipe. Different corrosion prevention technologies are prepared into different corrosion sample tubes, the corrosion sample tubes are fixed on the outer tube through the compression end cover, and the opening degree of the electric regulating valve is changed through the outer wall temperature control system to control the outer wall temperature of the corrosion sample tubes. The corrosion pipe assembly is fixed on the furnace wall of the garbage furnace through flange connection, and the whole high-temperature corrosion detection system is simple and reliable. The system solves the technical problem that the performance research of different on-site anticorrosion technologies can not ensure the comparative analysis in the same flue gas atmosphere at present, and provides a flue gas high-temperature corrosion detection system which does not need to damage a boiler flue, is simple, convenient and accurate and does not influence the normal operation of a garbage furnace.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a schematic view of the flue gas high temperature corrosion detection system of the garbage incinerator.
FIG. 2 is a schematic cross-sectional view of a sample tube region etched in a temperature controlled corrosion tube assembly.
Fig. 3 is a 3D schematic view of a single corrosion coupon.
FIG. 4 is a detection method of a high-temperature flue gas corrosion detection system of a waste incinerator.
1 in fig. 1. compressed air pipe; 2. a manual ball valve; 3. a filtering pressure-stabilizing valve; 4. an electric control valve; 5. controlling the storage unit; 6. a connecting flange; 7. a flange base; 8. a wall temperature thermocouple; 9. corroding the sample tube; 10. the end cover is pressed tightly by the screw thread; a water-cooled wall of the garbage incinerator; 12. an outer tube; 13. an inner tube; 14. a metal hose; 15. the valve is adjusted manually.
Detailed Description
The utility model provides a waste incinerator flue gas high temperature corrosion detecting system, the following combines the figure to do further detailed description to the utility model.
As shown in figure 1, the utility model provides a pair of msw incineration stove flue gas high temperature corrosion detecting system, including cooling air pipe-line system, accuse temperature corrosion tube subassembly and outer wall temperature control system. Wherein, cooling air pipe-line system includes: the device comprises a compressed air pipe 1, a manual ball valve 2, a filtering pressure stabilizing valve 3, an electric regulating valve 4, a manual regulating valve 15 and a metal hose 14. The temperature-controlled corrosion tube assembly comprises: the device comprises a connecting flange 6, a flange base 7, a corrosion sample pipe 9, a thread pressing end cover 10, an outer pipe 12 and an inner pipe 13. The outer wall temperature control system includes: a wall temperature thermocouple 8 and a control storage unit 5.
The cooling air comes from compressed air pipe 1 in the cooling air pipe-line system, then divide into two branches: the main branch is an inner pipe 13 of which the cooling air enters the temperature-control corrosion pipe assembly through the manual ball valve 2, the filtering pressure-stabilizing valve 3 and the electric regulating valve 4; the cooling air of the auxiliary branch enters an inner pipe 13 of the temperature-control corrosion pipe assembly through the manual ball valve 2, the filtering pressure-stabilizing valve 3 and the manual regulating valve 15, and the cooling air of the auxiliary branch plays a role of low-flow cooling protection air of the temperature-control corrosion pipe assembly when a fault occurs.
The corrosion prevention technology needing furnace verification in the temperature control corrosion tube assembly is prepared into a corrosion sample tube 9, and cooling air is released to the inner wall area of the corrosion sample tube 9 through a small hole in the front part of an inner tube 13, so that the method is different from the conventional hanging piece dry burning mode. The cooled air is released into the flue through the small holes on the wall surface of the outer pipe 12, and heat pollution to the environment is avoided. Meanwhile, the temperature control corrosion tube assembly is conveniently arranged on the water cooling wall 11 of the garbage incinerator through the connecting flange 6. As shown in FIG. 2, which is a schematic cross-sectional view of the area of the corrosion sample tubes 9 in the temperature-controlled corrosion tube assembly, an insulating ceramic gasket is additionally arranged between every two adjacent corrosion sample tubes 9 and is fixed on an outer tube 12 through a compression end cover 10. Fig. 3 is a 3D schematic view of a single corrosion coupon.
The outer wall temperature control system is characterized in that a wall temperature thermocouple 8 is arranged on the outer wall surface of a corrosion sample tube 9, the outer wall temperature of the corrosion sample tube in high-temperature corrosion of flue gas is monitored, meanwhile, a temperature signal is transmitted into a control storage unit 5, an actual measurement value is stored, the actual measurement value is compared with a design value, and the opening degree of an electric regulating valve 4 is adjusted in a feedback mode, so that the outer wall temperature is stabilized within a certain range.
As shown in fig. 4, a detection method of a high-temperature corrosion detection system for flue gas of a waste incinerator comprises the following steps: setting an outer wall temperature value T0, measuring an actual outer wall temperature value T, calculating an outer wall temperature difference value delta T to be | T-T0|, adjusting the opening V of the electric regulating valve, enabling the delta T to be close to 0 through continuous feedback regulation, and simultaneously storing T0 and T, V in real time according to minutes.
The compressed air pipeline 1 provides compressed air for a cooling air pipeline system, the cooling air enters an inner pipe 13 of the temperature-control corrosion pipe assembly through a connected metal hose 14, and a corrosion sample pipe 9 is cooled through a small hole in the front end of the inner pipe 13. The outer wall temperature of the corrosion sample tube 9 is controlled by changing the opening of the electric regulating valve 4 through an outer wall temperature control system. The corrosion tube assembly is connected and fixed on the water-cooled wall 11 of the garbage incinerator through the flange 6, the whole high-temperature corrosion detection system is simple and reliable, the corrosion tube assembly can be drawn out from a flue or inserted into a temperature control corrosion tube assembly to perform real furnace comparison verification of different corrosion prevention technologies, and the normal operation of the garbage incinerator is not influenced.
To sum up, the utility model discloses waste incinerator flue gas high temperature corrosion detecting system characteristics include following several at least:
1. the cooling air pipeline system comprises two branches: the cooling air main branch is used for adjusting the flow of cooling air and controlling the measured value of the temperature of the outer wall to be stabilized near a design value; and the cooling air auxiliary branch is used for cooling protective air with small flow for corroding the sample tube when a fault occurs.
2. The technical problem that performance research of different on-site anticorrosion technologies cannot guarantee comparative analysis in the same smoke atmosphere at present can be effectively solved.
3. The method can effectively solve the problem of life prediction of the water-cooled wall and the superheater equipment which are easy to corrode in the boiler under different parameters.
4. The high-temperature corrosion detection system can be put in or cut off on line at any time, and the normal operation of the garbage incinerator is not influenced.
The utility model discloses a city domestic waste incinerator flue gas high temperature corrosion detecting system and test method can predict the high temperature corrosion rate of different anticorrosive techniques in the different regions of boiler, and then can rationally select anticorrosive technique, and improve equipment's service life will have the significance to the design and the safe operation of boiler.
Claims (1)
1. A high-temperature corrosion detection system for flue gas of a garbage incinerator is characterized by comprising a cooling air pipeline system, a temperature control corrosion pipe assembly and an outer wall temperature control system; wherein, cooling air pipe-line system includes: the device comprises a compressed air pipe, a manual ball valve, a filtering pressure stabilizing valve, an electric regulating valve, a manual regulating valve and a metal hose; the temperature-controlled corrosion tube assembly comprises: the device comprises a connecting flange, a flange base, a corrosion sample pipe, a thread pressing end cover, an outer pipe and an inner pipe; the outer wall temperature control system includes: a wall temperature thermocouple and a control storage unit;
the temperature control corrosion pipe assembly corrosion sample pipe is arranged on the water-cooling wall of the garbage incinerator through a connecting flange; the connecting flange is arranged on the flange base, an insulating ceramic gasket is arranged between every two adjacent corrosion sample tubes, and the insulating ceramic gasket is fixed on the outer tube through a compression end cover;
the compressed air pipeline is connected with an inner pipe of the temperature-control corrosion pipe assembly through a connected metal hose, is connected through a small hole at the front end of the inner pipe and cools a corrosion sample pipe;
the cooling air in the cooling air pipeline system comes from a compressed air pipe and then is divided into two branches: the main branch is an inner pipe through which cooling air enters the temperature-control corrosion pipe assembly through a manual ball valve, a filtering pressure-stabilizing valve and an electric regulating valve; the auxiliary branch is an inner pipe through which cooling air enters the temperature-control corrosion pipe assembly through a manual ball valve, a filtering pressure-stabilizing valve and a manual regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021986673.6U CN214501256U (en) | 2020-09-11 | 2020-09-11 | High-temperature corrosion detection system for flue gas of waste incinerator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021986673.6U CN214501256U (en) | 2020-09-11 | 2020-09-11 | High-temperature corrosion detection system for flue gas of waste incinerator |
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| CN214501256U true CN214501256U (en) | 2021-10-26 |
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| CN202021986673.6U Active CN214501256U (en) | 2020-09-11 | 2020-09-11 | High-temperature corrosion detection system for flue gas of waste incinerator |
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