CN204855328U - Flue gas - coal ash is corrosion test device in coordination - Google Patents
Flue gas - coal ash is corrosion test device in coordination Download PDFInfo
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- CN204855328U CN204855328U CN201520669553.6U CN201520669553U CN204855328U CN 204855328 U CN204855328 U CN 204855328U CN 201520669553 U CN201520669553 U CN 201520669553U CN 204855328 U CN204855328 U CN 204855328U
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- flue gas
- boiler tube
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Abstract
The utility model discloses a flue gas - coal ash is corrosion test device in coordination, including gas supply system, water supply system, corrosion test subsystem and waste gas treatment system. Wherein, gas supply system includes a plurality of gas cylinder and muddy gas pitcher, water supply system includes measuring pump and water storage tank, the corrosion test subsystem includes boiler tube etc, waste gas treatment system condenser and exhaust -gas treatment container. The utility model discloses the composition of the stream speed adjusting synthetic flue gas of festival of accessible various gases of control and water, simulate the flue gas composition after the burning of different coals, simultaneously can apply paint the coal ash of different coals at the specimen surface with a brush, utilize this test device can simulate the temperature heating surface of thermal power factory material and appraise its anti -corrosion performance at flue gas - coal ash synergism's environment, its operating mode more is close the use operating mode of actual boiler tube, thereby provide the technological means for correctly appraising the coal -fired generating set temperature heating surface candidate material of high parameter at the anti flue gas corrosion behavior under the specific coal condition of burning.
Description
Technical field:
The utility model relates to a kind of flue gas-coal ash and works in coordination with corrosion testing apparatus, for simulating fuel-burning power plant high-temperature surface material at the synergistic environment of flue gas-coal ash to evaluate its corrosion resistance.
Background technology:
In field of thermal power; along with people are to the pay attention to day by day of economize energy and protection of the environment; unit parameter improves constantly; the raising of coal-burning boiler vapor (steam) temperature can cause tube on high-temperature heating surface fireside surface dust stratification and cause the collaborative corrosion of serious flue gas-coal ash; trommel is caused even booster to occur; therefore, corrosion resistance is one of key factor of heating surface selection, and simulation heating surface also becomes at the synergistic environment of flue gas-coal ash can the key of correct evaluating material corrosion resistance.
Prior art mainly contains two kinds, a kind of is pipeline dust stratification or the Prof. Du Yucang coal ash of power taking factory, spread upon specimen surface, then sample is placed in constant temperature resistance furnace after heating certain hour and sample is taken out analysis, its advantage is simple, shortcoming is only to smear coal ash to specimen surface, smokeless environment, differs greatly with the actual etching condition of boiler high temperature heating surface.The second is that test material to be studied is processed into test probe, be arranged in the boiler of actual motion, take out after running certain hour, observe probe corrosion condition, its advantage is complete realistic ruuning situation, and shortcoming is that test difficulty is large, and test temperature and fuel are with the change of actual motion condition greatly, the corrosion resistance of material is difficult to accurate quantitative analysis and characterizes, and the material category of test is limited.
Utility model content:
The purpose of this utility model is that providing a kind of can simulate the test unit of fuel-burning power plant high-temperature surface material at the synergistic corrosion environment of flue gas-coal ash, thus provides a kind of test unit of anti-flue gas-Coal ash corrosion performance of laboratory study coal-burning boiler high-temperature surface material.
For achieving the above object, the utility model adopts following technical scheme to be achieved:
Corrosion testing apparatus worked in coordination with by flue gas-coal ash, comprises air supply system, water system, corrosion test subsystem and exhaust treatment system; Wherein,
Air supply system comprises several gas cylinders and mixed gas tank, and each gas cylinder is all connected with mixed gas tank entrance by pipeline, and the pipeline that is connected with mixed gas tank entrance of each gas cylinder is also disposed with reduction valve, contaminant filter, flowmeter and retaining valve;
Water system comprises water tank and volume pump;
Corrosion test subsystem comprises boiler tube, air inlet side and the side of giving vent to anger of this boiler tube are all provided with flange, the circumference of boiler tube is provided with heating furnace, the air inlet side flange of boiler tube is provided with draft tube and water inlet pipe, and the air inlet side of boiler tube is provided with two Thermal packers, in the middle of these two Thermal packers, be provided with catalyzer, boiler tube side of giving vent to anger be provided with a Thermal packer, the side flange of giving vent to anger of boiler tube is provided with escape pipe;
Exhaust treatment system comprises condenser and exhaust-gas treatment container;
The mixed outlet of gas tank is connected with the draft tube entrance of corrosion test subsystem, and water tank is connected with the water inlet pipe entrance of corrosion test subsystem by volume pump; The escape pipe of corrosion test subsystem is connected by the entrance of condenser with exhaust-gas treatment container, and the outlet of exhaust-gas treatment container is connected with air; During test, the sample of surface smear coal ash is placed in the middle part of boiler tube by specimen mounting.
The utility model further improves and is: respectively N is housed in several gas cylinders
2, CO
2, SO
2, CO and O
2.
The utility model further improves and is: N is housed
2, CO
2, CO or O
2cylinder outlet be divided into two strands by the second threeway, one is connected with mixed gas tank entrance, another strand is connected with the first threeway gas access be arranged on pipeline that volume pump is connected with the water inlet pipe entrance of corrosion test subsystem, and the mixing wastewater with air outlet of the first threeway is connected with water inlet pipe entrance.
The utility model further improves and is: water inlet pipe enters furnace high-temperature district through two Thermal packers of air inlet side and catalyzer in boiler tube, and draft tube is not through air inlet side Thermal packer.
The utility model further improves and is: also comprise the well heater for heating water inlet pipe and be arranged on the muff outside the water inlet pipe between well heater and heating furnace.
The utility model further improves and is: sample and specimen mounting are placed within the scope of the uniform temperature zone of boiler tube.
The utility model further improves and is: Thermal packer offers some through holes be convenient to gas and passed in the axial direction.
The utility model further improves and is: catalyzer is noble metal catalyst or vanadium catalyst catalyzer.
Relative to prior art, the utility model is by controlling the composition of the velocity of flow adjust synthesis flue gas of various gas and water, simulate the smoke components after Coal rank burning, simultaneously can at the coal ash of specimen surface brushing Coal rank, utilize this test unit can simulate fuel-burning power plant high-temperature surface material at the synergistic environment of flue gas-coal ash to evaluate its corrosion resistance, its operating mode is closer to the applying working condition of actual boiler tube, thus provide technological means for correctly evaluating the anti-flue gas corrosion performance of high parameter Thermal generation unit high-temperature surface candidate material under the specific coal condition of burning.
Accompanying drawing illustrates:
Fig. 1 is the one-piece construction schematic diagram that corrosion testing apparatus worked in coordination with by the utility model flue gas-coal ash;
In figure: 1-gas cylinder; 2-volume pump; 3-water tank; 4-contaminant filter; 5-flowmeter; 6-retaining valve; 7-mixes gas tank; 8-well heater; 9-muff; 10-Thermal packer; 11-catalyzer; 12-specimen mounting; 13-heating furnace; 14-condenser; 15-exhaust-gas treatment container; 16-draft tube; 17-water inlet pipe; 18-escape pipe; 19-first threeway; 20-second threeway; 21-boiler tube.
Embodiment:
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, corrosion testing apparatus worked in coordination with by the utility model flue gas-coal ash, comprises air supply system, water system, corrosion test subsystem and exhaust treatment system.
Wherein, air supply system comprises several gas cylinders 1 and mixed gas tank 7, each gas cylinder 1 is all connected with mixed gas tank 7 entrance by pipeline, and the pipeline that is connected with mixed gas tank 7 entrance of each gas cylinder 1 is also disposed with reduction valve, contaminant filter 4, flowmeter 5 and retaining valve 6; Wherein, the flowmeter of spinner-type flowmeter, mass-flow gas meter or other type selected by flowmeter 5, respectively N is housed in several gas cylinders 1
2, CO
2, SO
2, CO and O
2.
Water system comprises volume pump 2 and water tank 3.
Corrosion test subsystem comprises boiler tube 21, air inlet side and the side of giving vent to anger of this boiler tube 21 are all provided with flange, the circumference of boiler tube 21 is provided with heating furnace 13, the air inlet side flange of boiler tube 21 is provided with draft tube 16 and water inlet pipe 17, and the air inlet side of boiler tube 21 is provided with two Thermal packers 10, catalyzer 11 is provided with in the middle of these two Thermal packers 10, by adjusting the position of two Thermal packers 10 of boiler tube (21) air inlet side, the temperature in the middle of two Thermal packers 10 is made to be within the scope of the optimal reaction temperature of catalyzer 11; Boiler tube 21 side of giving vent to anger is provided with a Thermal packer 10, the side flange of giving vent to anger of boiler tube 21 is provided with escape pipe 18;
Exhaust treatment system comprises condenser 14 and exhaust-gas treatment container 15;
The mixed outlet of gas tank 7 is connected with draft tube 16 entrance of corrosion test subsystem, and water tank 3 is connected with water inlet pipe 17 entrance of corrosion test subsystem by volume pump 2; The escape pipe 18 of corrosion test subsystem is connected by the entrance of condenser 14 with exhaust-gas treatment container 15, and the outlet of exhaust-gas treatment container 15 is connected with air; During test, the sample of surface smear coal ash is placed within the scope of the uniform temperature zone in the middle part of boiler tube 21 by specimen mounting 12.
Further, N is housed
2, CO
2, CO or O
2gas cylinder 1 export and be divided into two strands by the second threeway 20, one is connected with mixed gas tank 7 entrance, the first threeway 19 gas access that the pipeline that another strand and volume pump 2 are connected with water inlet pipe 17 entrance of corrosion test subsystem is arranged is connected, and the mixing wastewater with air outlet of the first threeway 19 is connected with water inlet pipe 17 entrance.
Further, water inlet pipe 17 enters furnace high-temperature district through two Thermal packers 10 of air inlet side and catalyzer 11 in boiler tube 21, and draft tube 16 is not through air inlet side Thermal packer 10.
Further, also comprise the well heater 8 for heating water inlet pipe 17 and be arranged on the muff 9 outside the water inlet pipe 17 between well heater 8 and heating furnace 13.
Further, Thermal packer 10 offers some through holes be convenient to gas and passed in the axial direction.
Further, catalyzer 11 be noble metal catalyst, vanadium catalyst catalyzer or other can catalysis SO
2and O
2reaction make it formed SO
3catalyzer.
Further, specimen mounting 10 is made up of the material of high temperature resistant sulfur corrosion.
In order to further understand the utility model, now its course of work is explained as follows:
See Fig. 1, the utility model is made up of air supply system, water system, corrosion test subsystem and exhaust treatment system, air supply system can carry the various gases needed for simulated flue gas quantitatively in corrosion test subsystem, the major function of water system is the product water steam quantitatively carried in corrosion test subsystem in simulated flue gas after fuel combustion, and corrosion test subsystem can realize SO
2be catalyzed into SO
3and completing the corrosion test of sample, exhaust treatment system has the harmless treatment function of waste gas.
Specifically, process of the test is: first calculate simulated flue gas and coal ash composition according to the data intending test coal, regulate N according to smoke components
2, O
2, CO
2, CO, SO
2be set as suitable gas flow in the flowmeter 5 on gas piping, regulate volume pump 2 to set suitable discharge; Proportioning synthesis coal ash, spreads upon specimen surface, is arranged on by sample on specimen mounting 12, and be positioned within the scope of the uniform temperature zone in the middle part of boiler tube 21; By in exhaust-gas treatment container 15 inject can with SO
3the alkaline solution of reaction, such as NaOH solution.Then the uniform temperature zone of well heater 8 and corrosion test subsystem 13 is heated to design temperature.Open reduction valve and volume pump 5 power supply of each road gas subsequently, pass into corrosion test subsystem 13 with making the component quantifying of simulated flue gas.Portion temperature in the middle of boiler tube 21 entrance side two Thermal packers 10, between 400 ~ 600 DEG C, even if catalyzer 11 is in the optimal reaction temperature scope of platinum catalyst or vanadium catalyst, impels SO
2with O
2react and form SO
3.Test duration carries out, and the power supply of closing well heater 8 and corrosion test subsystem 13 after reaching the schedule time stops heating, closes O
2, CO
2, CO, SO
2deng the reduction valve of gas, make N
2continue through mixed gas tank 7 and pass into corrosion test subsystem 13, after thoroughly being discharged by mordant gas remaining in system, close N
2reduction valve, off-test.
Claims (8)
1. corrosion testing apparatus worked in coordination with by flue gas-coal ash, it is characterized in that: comprise air supply system, water system, corrosion test subsystem and exhaust treatment system; Wherein,
Air supply system comprises several gas cylinders (1) and mixed gas tank (7), each gas cylinder (1) is all connected with mixed gas tank (7) entrance by pipeline, and the pipeline that is connected with mixed gas tank (7) entrance of each gas cylinder (1) is also disposed with reduction valve, contaminant filter (4), flowmeter (5) and retaining valve (6);
Water system comprises water tank (3) and volume pump (2);
Corrosion test subsystem comprises boiler tube (21), air inlet side and the side of giving vent to anger of this boiler tube (21) are all provided with flange, the circumference of boiler tube (21) is provided with heating furnace (13), the air inlet side flange of boiler tube (21) is provided with draft tube (16) and water inlet pipe (17), and the air inlet side of boiler tube (21) is provided with two Thermal packers (10), catalyzer (11) is provided with in the middle of these two Thermal packers (10), boiler tube (21) side of giving vent to anger is provided with a Thermal packer (10), the side flange of giving vent to anger of boiler tube (21) is provided with escape pipe (18),
Exhaust treatment system comprises condenser (14) and exhaust-gas treatment container (15);
The mixed outlet of gas tank (7) is connected with draft tube (16) entrance of corrosion test subsystem, and water tank (3) is connected with water inlet pipe (17) entrance of corrosion test subsystem by volume pump (2); The escape pipe (18) of corrosion test subsystem is connected by the entrance of condenser (14) with exhaust-gas treatment container (15), and the outlet of exhaust-gas treatment container (15) is connected with air; During test, the sample of surface smear coal ash is placed on boiler tube (21) middle part by specimen mounting (12).
2. corrosion testing apparatus worked in coordination with by flue gas-coal ash according to claim 1, it is characterized in that: several gas cylinders are equipped with N in (1) respectively
2, CO
2, SO
2, CO and O
2.
3. corrosion testing apparatus worked in coordination with by flue gas-coal ash according to claim 2, it is characterized in that: N is housed
2, CO
2, CO or O
2gas cylinder (1) outlet be divided into two strands by the second threeway (20), one is connected with mixed gas tank (7) entrance, another stock is connected with the first threeway (19) gas access be arranged on pipeline that volume pump (2) is connected with water inlet pipe (17) entrance of corrosion test subsystem, and the mixing wastewater with air outlet of the first threeway (19) is connected with water inlet pipe (17) entrance.
4. corrosion testing apparatus worked in coordination with by flue gas-coal ash according to claim 1, it is characterized in that: water inlet pipe (17) enters furnace high-temperature district through two Thermal packers (10) of air inlet side and catalyzer (11) in boiler tube (21), and draft tube (16) is not through air inlet side Thermal packer (10).
5. corrosion testing apparatus worked in coordination with by flue gas-coal ash according to claim 1, it is characterized in that: also comprise the well heater (8) for heating water inlet pipe (17) and be arranged on the muff (9) in water inlet pipe (17) outside between well heater (8) and heating furnace (13).
6. corrosion testing apparatus worked in coordination with by flue gas-coal ash according to claim 1, it is characterized in that: sample and specimen mounting (12) are placed within the scope of the uniform temperature zone of boiler tube (21).
7. corrosion testing apparatus worked in coordination with by flue gas-coal ash according to claim 1, it is characterized in that: Thermal packer (10) offers some through holes be convenient to gas and passed in the axial direction.
8. corrosion testing apparatus worked in coordination with by flue gas-coal ash according to claim 1, it is characterized in that: catalyzer (11) is noble metal catalyst or vanadium catalyst catalyzer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520669553.6U CN204855328U (en) | 2015-08-31 | 2015-08-31 | Flue gas - coal ash is corrosion test device in coordination |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520669553.6U CN204855328U (en) | 2015-08-31 | 2015-08-31 | Flue gas - coal ash is corrosion test device in coordination |
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| CN204855328U true CN204855328U (en) | 2015-12-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043967A (en) * | 2015-08-31 | 2015-11-11 | 西安热工研究院有限公司 | Smoke-coal ash synergic corrosion testing device |
| CN106442294A (en) * | 2016-10-19 | 2017-02-22 | 东方电气集团东方汽轮机有限公司 | Fuel gas hot corrosion resistance detection device of material and protective coating of the material |
| CN109030708A (en) * | 2018-07-24 | 2018-12-18 | 南京师范大学 | It is a kind of can dynamic collection metal vapors tube furnace experimental rig |
-
2015
- 2015-08-31 CN CN201520669553.6U patent/CN204855328U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043967A (en) * | 2015-08-31 | 2015-11-11 | 西安热工研究院有限公司 | Smoke-coal ash synergic corrosion testing device |
| CN106442294A (en) * | 2016-10-19 | 2017-02-22 | 东方电气集团东方汽轮机有限公司 | Fuel gas hot corrosion resistance detection device of material and protective coating of the material |
| CN106442294B (en) * | 2016-10-19 | 2018-12-14 | 东方电气集团东方汽轮机有限公司 | A kind of combustion gas hot corrosion resistance detection device of material and its protective coating |
| CN109030708A (en) * | 2018-07-24 | 2018-12-18 | 南京师范大学 | It is a kind of can dynamic collection metal vapors tube furnace experimental rig |
| CN109030708B (en) * | 2018-07-24 | 2023-11-17 | 南京师范大学 | Tubular furnace test device capable of dynamically collecting metal vapor |
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