CN104655549A - Low-temperature acid dew point corrosion experimental device for power station boiler flue gas - Google Patents
Low-temperature acid dew point corrosion experimental device for power station boiler flue gas Download PDFInfo
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- CN104655549A CN104655549A CN201510056433.3A CN201510056433A CN104655549A CN 104655549 A CN104655549 A CN 104655549A CN 201510056433 A CN201510056433 A CN 201510056433A CN 104655549 A CN104655549 A CN 104655549A
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Abstract
The invention discloses a low-temperature acid dew point corrosion experimental device for power station boiler flue gas. The low-temperature acid dew point corrosion experimental device comprises an experimental platform, a flue gas experimental pipeline, a pitot tube manometer, a cooling system, a heating system, an induced draft fan, a measurement and collection system and a control system, wherein the inlet end and the outlet end of the flue gas experimental pipeline are communicated with a rear flue of a boiler air pre-heater, the pitot tube manometer is arranged at the inlet end of the flue gas experimental pipeline, a first high temperature heat exchanger, a second high temperature heat exchanger, a low temperature heat exchanger and an experimental segment heat exchanger, which are connected in series, are arranged on the flue gas experimental pipeline along the flue gas flow direction, and the cooling system is used for cooling passed flue gas and cooling flue gas in the experimental segment heat exchanger to a low-temperature acid dew point corrosion experimental temperature of 70 DEG C. The experimental device is used for solving the low temperature corrosion problem of a low-temperature economizer for the boiler flue gas and providing the theoretical foundation and the technical support for the popularization and application of novel corrosion resistant materials.
Description
Technical field
The present invention relates to electric system flue gas in power station boiler cold end corrosion field, specifically refer to flue gas in power station boiler low temperature acid dew piont corrosion experimental provision.
Background technology
In view of " 12 " period country clearly proposes " to popularize waste heat hydraulic recovery in an all-round way in waste heat overbottom pressure aboundresources industry and utilize technology, advance the recycling of low-quality thermal source, form the step comprehensive utilization of the energy." and the key that restricts flue gas in power station boiler low temperature heat is at present the acid dew piont corrosion problem of metal material, if this problem cannot solve, so the deep exploitation of fume afterheat is just difficult to realize.Low temperature acid dew piont corrosion problem in flue gas in power station boiler degree of depth UTILIZATION OF VESIDUAL HEAT IN process is a complicated physical and chemical process, needs the multi-subject knowledges such as integrated application chemistry, material, heat and mass, carries out interdisciplinary research.At present, all thoroughly do not solve cold end corrosion mechanism problem both at home and abroad, the usual cost of cold end corrosion measure is high in conventional alleviating, difficulty of processing is large, affect heat transfer property, some then can only slow down but be difficult to thoroughly solve cold end corrosion problem.
Summary of the invention
The object of this invention is to provide flue gas in power station boiler low temperature acid dew piont corrosion experimental provision, the cold end corrosion problem that this experimental provision is solution low-temperature coal economizer of boiler and applying of Novel corrosion-resistant corrosion material provide theoretical foundation and technical support.
Above-mentioned purpose of the present invention realizes by following technical solution: the experimental provision of flue gas in power station boiler low temperature acid dew piont corrosion test, it is characterized in that: this experimental provision comprises experiment porch, flue gas experiment pipeline, pitot tube knotmeter, cooling system, heating system, induced draft fan, measure and acquisition system and control system, the entrance point of described flue gas experiment pipeline is connected with boiler air preheater rear pass with endpiece, pitot tube knotmeter is arranged on the entrance point of flue gas experiment pipeline, flue gas experiment pipeline is disposed with according to flow of flue gas direction the high temperature First Heat Exchanger be in series, high temperature second heat interchanger, cryogenic heat exchanger and experimental section heat interchanger, described high temperature First Heat Exchanger, high temperature second heat interchanger, cryogenic heat exchanger and residing pipeline constitute cooling rectification section, described heating system is arranged on the pipeline section of flue gas experiment pipeline between experimental section heat interchanger and boiler flue, described cooling system comprises high temperature temperature reducing unit and low temperature temperature reducing unit, described high temperature temperature reducing unit respectively with high temperature First Heat Exchanger, high temperature second heat interchanger is connected, for to flowing through high temperature First Heat Exchanger, the flue gas cool-down of high temperature second heat interchanger, described low temperature temperature reducing unit is connected with cryogenic heat exchanger and experimental section heat interchanger respectively, for to the flue gas cool-down flowing through cryogenic heat exchanger and experimental section heat interchanger, the flue gas in experimental section heat interchanger is made to be down to the low temperature acid dew piont corrosion experimental temperature of 70 DEG C, carry out low temperature acid dew piont corrosion to the pipeline material of experimental section heat interchanger to test, described induced draft fan is positioned at the endpiece of flue gas experiment pipeline, described heating system by the flue gas that flows through after experimental section heat interchanger after assigned temperature, introduced by induced draft fan and send into boiler flue.
Experimental provision of the present invention, deeply can probe into formation and the influence condition of boiler tail flue gas cold end corrosion, test the corrosion resistance characteristic of material under different flue gas condition, for Research foundation is set up in low temperature heat and the corrosion-resistant research of low temperature.
In the present invention, described high temperature First Heat Exchanger, high temperature second heat interchanger all has heat exchanger tube and detachable housing, facilitate deashing and inspection, high temperature First Heat Exchanger, high temperature second heat interchanger is flue gas and walks shell side, water walks the shell-and-tube heat exchanger of tube side, described high temperature temperature reducing unit adopts air-cooled temperature-reduction unit, described air-cooled temperature-reduction unit comprises water tank, air-cooled coil pipe and hair-dryer, described water tank has two water inlets and two water delivering orifices, one of them water delivering orifice is connected by cooling line with a water inlet, described air-cooled coil pipe is arranged in described cooling line, for one section of pipeline section of described cooling line, described hair-dryer is just to air-cooled coil pipe, the wind of blowout is used for lowering the temperature to air-cooled coil pipe, cooling line is also provided with water pump, another water inlet of water tank respectively with high temperature First Heat Exchanger, in high temperature second heat interchanger, the outlet mouth of pipe of heat exchanger tube is connected, another water delivering orifice of water tank is connected with cooling main pipe rail, also water pump is provided with in described cooling main pipe rail, described cooling main pipe rail is at close high temperature First Heat Exchanger, two-way cooling bye-pass is divided into during high temperature the second heat interchanger, two-way cooling bye-pass respectively with high temperature First Heat Exchanger, in high temperature second heat interchanger, the import mouth of pipe of heat exchanger tube is connected.
High temperature temperature reducing unit in the present invention adopts air-cooled coil pipe to lower the temperature, and ensures that water temperature is constant.
In the present invention, the heat exchanger tube in described high temperature First Heat Exchanger, high temperature second heat interchanger is finned tube, strengthens heat transfer effect.
In the present invention, described cryogenic heat exchanger, experimental section heat interchanger, all there is heat exchanger tube and detachable housing, facilitate deashing and inspection, cryogenic heat exchanger, experimental section heat interchanger is flue gas and walks shell side, water walks the shell-and-tube heat exchanger of tube side, described low temperature temperature reducing unit adopts water-cooled temperature reducing unit, described water-cooled temperature reducing unit comprises water cooling unit, described water cooling unit has two water inlets and a water delivering orifice, this water delivering orifice is connected with outfall sewer road, water pump is provided with in described outfall sewer road, described outfall sewer road is at close cryogenic heat exchanger, two-way outlet bye-pass is divided into during experimental section heat interchanger, two-way outlet bye-pass respectively with cryogenic heat exchanger, in experimental section heat interchanger, the import mouth of pipe of heat exchanger tube is connected, two water inlets of described water cooling unit respectively with cryogenic heat exchanger, in experimental section heat interchanger, the outlet mouth of pipe of heat exchanger tube is connected.
Low temperature temperature reducing unit in the present invention adopts water cooling unit cooling, ensures that water temperature is constant.
In the present invention, the heat exchanger tube in described cryogenic heat exchanger, experimental section heat interchanger is finned tube, strengthens heat transfer effect.
In the present invention, described experiment porch is the U-shaped framework of horizontally disposed opening towards boiler flue, and flue gas experiment pipeline is that horizontally disposed with U-shaped frame openings U-shaped pipeline in the same way, described flue gas experiment pipeline support is on described experiment porch.
In the present invention, it is the aerating mixer that shape in parallel is arranged that described experimental provision also has additional with boiler flue, can the various gases of splendid attire simulated experiment in this aerating mixer, the entrance point that pipeline is tested respectively by pipeline and described flue gas in the two ends of described aerating mixer is connected with endpiece, this aerating mixer experimental provision not in boiler flue site test time, various gas can be provided to carry out simulated experiment.
In the present invention, described heating system is electric heating system, the flue gas that type of heating adopts heating tube or Resistant heating to flow through.
In the present invention, described measurement and acquisition system comprise correspondence and are arranged on thermometer, tensimeter, flow velocity and flow sensor on each pipeline.
Compared with prior art, the cold end corrosion problem of heated surface at the end of boiler when the present invention can solve burning inferior coal, experimental provision provided by the present invention not only directly can be connected with station boiler flue and be used for testing, also actual low-temperature coal economizer of boiler flue gas flow field can be simulated, deeply can probe into formation and the influence condition of boiler tail flue gas cold end corrosion, the corrosion resistance characteristic of test material under different flue gas condition, for Research foundation is set up in low temperature heat and the corrosion-resistant research of low temperature.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
Fig. 1 is the one-piece construction block diagram of flue gas in power station boiler low temperature acid dew piont corrosion experimental provision of the present invention;
Fig. 2 is the vertical view of part-structure in flue gas in power station boiler low temperature acid dew piont corrosion experimental provision of the present invention.
Description of reference numerals:
1, experiment porch; 2, flue gas experiment pipeline; 2a, entrance point; 2b, endpiece;
3, boiler flue; 4, aerating mixer; 5, pitot tube knotmeter; 6, high temperature First Heat Exchanger;
7, high temperature second heat interchanger; 8, hair-dryer; 9, air-cooled coil pipe; 10, water tank;
11, cooling line; 12, cooling main pipe rail; 13, water pump; 14, water pump;
15, cryogenic heat exchanger; 16, experimental section heat interchanger; 17, water cooling unit; 18, outfall sewer road;
19, water pump; 20, heating system; 21, induced draft fan
Embodiment
As Fig. 1, flue gas in power station boiler low temperature acid dew piont corrosion experimental provision shown in Fig. 2, this experimental provision comprises experiment porch 1, flue gas experiment pipeline 2, pitot tube knotmeter 5, cooling system, heating system 20, induced draft fan 21, measure and acquisition system and control system, experiment porch 1 is the U-shaped framework of horizontally disposed opening towards boiler flue 3, this experiment porch 1 also has traversing carriage, be convenient to mobile, flue gas experiment pipeline 2 is horizontally disposed with U-shaped frame openings U-shaped pipeline in the same way, to ensure that experiment flue gas flow field meets the demands, flue gas experiment pipeline 2 support is on experiment porch 1.
The entrance point 2a of flue gas experiment pipeline 2 is connected with boiler flue 3 with endpiece 2b, specifically be connected with boiler air preheater rear pass, pitot tube knotmeter 5 is arranged on the entrance point 2a of flue gas experiment pipeline 2, flue gas experiment pipeline 2 is disposed with according to flow of flue gas direction the high temperature First Heat Exchanger 6 be in series, high temperature second heat interchanger 7, cryogenic heat exchanger 15 and experimental section heat interchanger 16, high temperature First Heat Exchanger 6, high temperature second heat interchanger 7, cryogenic heat exchanger 15 and residing pipeline constitute cooling rectification section, heating system 20 is arranged on the pipeline section of flue gas experiment pipeline 2 between experimental section heat interchanger 16 and boiler flue 3.
Cooling system comprises high temperature temperature reducing unit and low temperature temperature reducing unit, high temperature temperature reducing unit respectively with high temperature First Heat Exchanger 6, high temperature second heat interchanger 7 is connected, for to flowing through high temperature First Heat Exchanger 6, the flue gas cool-down of high temperature second heat interchanger 7, low temperature temperature reducing unit is connected with cryogenic heat exchanger 15 and experimental section heat interchanger 16 respectively, for to the flue gas cool-down flowing through cryogenic heat exchanger 15 and experimental section heat interchanger 16, the flue gas in experimental section heat interchanger 16 is made to be down to the low temperature acid dew piont corrosion experimental temperature of 70 DEG C, carry out low temperature acid dew piont corrosion to the pipeline material of experimental section heat interchanger 16 to test, induced draft fan 21 is positioned at the endpiece 2b of flue gas experiment pipeline 2, heating system 20 by the flue gas that flows through after experimental section heat interchanger 16 after assigned temperature, introduced by induced draft fan 21 and send into boiler flue 3.
In the present embodiment, high temperature First Heat Exchanger 6 and residing pipeline thereof are cooling rectification I section, high temperature second heat interchanger 7 and residing pipeline thereof are cooling rectification II section, cryogenic heat exchanger 15 and residing pipeline thereof are cooling rectification III section, and cooling rectification I section, cooling rectification II section and cooling rectification III section constitute whole cooling rectification section.Experimental section heat interchanger 16 and residing pipeline thereof are experimental section.
In the present embodiment, high temperature First Heat Exchanger 6, high temperature second heat interchanger 7, cryogenic heat exchanger 15 and experimental section heat interchanger 16 all have heat exchanger tube and detachable housing, facilitate deashing and inspection, high temperature First Heat Exchanger 6, high temperature second heat interchanger 7, cryogenic heat exchanger 15 and experimental section heat interchanger 16 are the shell-and-tube heat exchanger that flue gas walks shell side, water walks tube side, heat exchanger tube in high temperature First Heat Exchanger 6, high temperature second heat interchanger 7, cryogenic heat exchanger 15 and experimental section heat interchanger 16 is finned tube, strengthens heat transfer effect.
High temperature temperature reducing unit adopts air-cooled temperature-reduction unit, air-cooled temperature-reduction unit comprises water tank 10, air-cooled coil pipe 9 and hair-dryer 8, water tank 10 has two water inlets and two water delivering orifices, one of them water delivering orifice is connected by cooling line 11 with a water inlet, air-cooled coil pipe 9 is arranged in cooling line 11, for one section of pipeline section of cooling line 11, hair-dryer 8 is just to air-cooled coil pipe 9, the wind of blowout is used for lowering the temperature to air-cooled coil pipe 9, cooling line 11 is also provided with water pump 13, another water inlet of water tank 10 respectively with high temperature First Heat Exchanger 6, in high temperature second heat interchanger 7, the outlet mouth of pipe of heat exchanger tube is connected, another water delivering orifice of water tank 10 is connected with cooling main pipe rail 12, also water pump 14 is provided with in cooling main pipe rail 12, cooling main pipe rail 12 is at close high temperature First Heat Exchanger 6, two-way cooling bye-pass is divided into during high temperature the second heat interchanger 7, two-way cooling bye-pass respectively with high temperature First Heat Exchanger 6, in high temperature second heat interchanger 7, the import mouth of pipe of heat exchanger tube is connected.
Low temperature temperature reducing unit adopts water-cooled temperature reducing unit, water-cooled temperature reducing unit comprises water cooling unit 17, water cooling unit 17 has two water inlets and a water delivering orifice, this water delivering orifice is connected with outfall sewer road 18, water pump 19 is provided with in outfall sewer road 18, outfall sewer road 18 is at close cryogenic heat exchanger 15, two-way outlet bye-pass is divided into during experimental section heat interchanger 16, two-way outlet bye-pass respectively with cryogenic heat exchanger 15, in experimental section heat interchanger 16, the import mouth of pipe of heat exchanger tube is connected, two water inlets stating water cooling unit 17 respectively with cryogenic heat exchanger 15, in experimental section heat interchanger 16, the outlet mouth of pipe of heat exchanger tube is connected.
Heating system 20 is electric heating system, the flue gas that type of heating adopts Resistant heating to flow through, and heating tube also can be adopted to heat the flue gas flowed through.To measure and acquisition system comprises correspondence and is arranged on thermometer, tensimeter, flow velocity and flow sensor on each pipeline, and by PLC, parameters is gathered.
3 water pump structures in the present embodiment are identical, lift 15m, and ventilated disc tube power is 15kw, and water cooling unit power is 3kw, and be coated with corrosion-proof wear-resistant material in induced draft fan 21, specification is 1000m3/h, 1500Pa.
Control system comprises switch board, and separately joins movable supporting frame, and switch board comprises associated electrical components, only needs, toward switch board access power supply, just can carry out the experiment of whole system during installation.Switch board controls to adopt PLC to control, and regulates inflow at any time and adds heat, ensure that control accuracy is ± 1 DEG C according to each section of outlet cigarette temperature, and real time record experiment parameter.The parameter controlled is needed to have: the outlet cigarette temperature of high temperature First Heat Exchanger 6, high temperature second heat interchanger 7, cryogenic heat exchanger 15, experimental section heat interchanger 16 and heating system 20, and water tank 10, water temperature in water cooling unit 17.
In the present embodiment, induced draft fan adopts variable frequency control, the electronic valve regulating flow of water pump.
When experimental provision of the present invention directly connects boiler flue 3, flue gas flow is: cooling rectification section-> experimental section heat interchanger 16-> heating system 20-> induced draft fan 21-> boiler flue 3 that boiler flue 3-> pitot tube knotmeter 5-> high temperature First Heat Exchanger 6, high temperature second heat interchanger 7, cryogenic heat exchanger 15 are formed.
The process of experimental provision of the present invention when carrying out the experiment of low temperature acid dew piont corrosion is as follows: boiler smoke is drawn from boiler flue 3, flue-gas temperature T=140 DEG C now, flue gas flows through high temperature First Heat Exchanger 6, by high temperature temperature reducing unit, flue gas is lowered the temperature after high temperature second heat interchanger 7, flue-gas temperature is made to be down to T=105 DEG C, enter cryogenic heat exchanger 15 afterwards, flue-gas temperature is made to be down to T=90 DEG C, section heat interchanger 16 by experiment again, by the accurate control to cigarette temperature, the flue gas in experimental section heat interchanger 16 is made to be down to the low temperature acid dew piont corrosion experimental temperature of 50-80 DEG C, it is made to reach the temperature of requirement of experiment.
Cooling system comprises high temperature temperature reducing unit and low temperature temperature reducing unit, and high temperature temperature reducing unit adopts air-cooled temperature-reduction unit, and high temperature temperature descending section water temperature is 65 DEG C, adopts air-cooled coil pipe 9 to lower the temperature, and ensures that water temperature is constant; Low temperature temperature descending section water temperature is 50 DEG C, adopts water cooling unit 17 to lower the temperature, and ensures that water temperature is constant; Experimental section heat interchanger 16 is tested flue gas acid dew point and pipeline material according to the requirement of different experiments, coolant water temperature is arranged as 50-80 DEG C, test by carrying out low temperature acid dew piont corrosion to the pipeline material of experimental section heat interchanger, obtain the low temperature acid dew piont corrosion experimental conditions that experimental section inner tube of heat exchanger road in flue-gas temperature is 70 DEG C, for the cold end corrosion problem and applying of Novel corrosion-resistant corrosion material solving boiler smoke low-level (stack-gas) economizer provides theoretical foundation and technical support; The flue gas that flows through after experimental section heat interchanger 16 after assigned temperature 140 DEG C, is introduced into boiler flue 3 by induced draft fan 21 by electric heater.
In order to make also can not to carry out low temperature acid dew point anticorrosion experiment when boiler flue 3 is on-the-spot, the present invention can introduce aerating mixer 4, namely experimental provision does following improvement: experimental provision also has additional the aerating mixer 4 arranged in shape in parallel with boiler flue 3, can the various gases of splendid attire simulated experiment in this aerating mixer 4, the entrance point 2a that pipeline 2 is tested respectively by pipeline and flue gas in the two ends of aerating mixer 4 is connected with endpiece 2b, this aerating mixer 4 experimental provision not in boiler flue 3 site test time, various gas can be provided to carry out simulated experiment.
Introducing aerating mixer 4 makes experimental provision of the present invention have application space widely, namely directly can connect the field experiment that boiler flue 3 carries out low-temperature flue gas corrosion, also can connect aerating mixer 4 and carry out the corrosive simulated experiment of low-temperature flue gas.
When experimental provision of the present invention is not tested at the scene, during direct connection aerating mixer 4, flue gas flow is: cooling rectification section-> experimental section heat interchanger 16-> heating system 20-> induced draft fan 21-> aerating mixer 4 that aerating mixer 4-> pitot tube knotmeter 5-> high temperature First Heat Exchanger 6, high temperature second heat interchanger 7, cryogenic heat exchanger 15 are formed.
The above embodiment of the present invention is not limiting the scope of the present invention; embodiments of the present invention are not limited thereto; all this kind is according to foregoing of the present invention; according to ordinary technical knowledge and the customary means of this area; do not departing under the present invention's above-mentioned basic fundamental thought prerequisite; to the amendment of other various ways that said structure of the present invention is made, replacement or change, all should drop within protection scope of the present invention.
Claims (9)
1. flue gas in power station boiler low temperature acid dew piont corrosion experimental provision, it is characterized in that: this experimental provision comprises experiment porch, flue gas experiment pipeline, pitot tube knotmeter, cooling system, heating system, induced draft fan, measure and acquisition system and control system, the entrance point of described flue gas experiment pipeline is connected with boiler air preheater rear pass with endpiece, pitot tube knotmeter is arranged on the entrance point of flue gas experiment pipeline, flue gas experiment pipeline is disposed with according to flow of flue gas direction the high temperature First Heat Exchanger be in series, high temperature second heat interchanger, cryogenic heat exchanger and experimental section heat interchanger, described high temperature First Heat Exchanger, high temperature second heat interchanger, cryogenic heat exchanger and residing pipeline constitute cooling rectification section, described heating system is arranged on the pipeline section of flue gas experiment pipeline between experimental section heat interchanger and boiler flue, described cooling system comprises high temperature temperature reducing unit and low temperature temperature reducing unit, described high temperature temperature reducing unit respectively with high temperature First Heat Exchanger, high temperature second heat interchanger is connected, for to flowing through high temperature First Heat Exchanger, the flue gas cool-down of high temperature second heat interchanger, described low temperature temperature reducing unit is connected with cryogenic heat exchanger and experimental section heat interchanger respectively, for to the flue gas cool-down flowing through cryogenic heat exchanger and experimental section heat interchanger, the flue gas in experimental section heat interchanger is made to be down to the low temperature acid dew piont corrosion experimental temperature of 70 DEG C, carry out low temperature acid dew piont corrosion characteristic to the pipeline material of experimental section heat interchanger to test, described induced draft fan is positioned at the endpiece of flue gas experiment pipeline, described heating system by the flue gas that flows through after experimental section heat interchanger after assigned temperature, introduced by induced draft fan and send into boiler flue.
2. flue gas in power station boiler low temperature acid dew piont corrosion experimental provision according to claim 1, it is characterized in that: described high temperature First Heat Exchanger, high temperature second heat interchanger all has heat exchanger tube and detachable housing, facilitate deashing and inspection, high temperature First Heat Exchanger, high temperature second heat interchanger is flue gas and walks shell side, water walks the shell-and-tube heat exchanger of tube side, described high temperature temperature reducing unit adopts air-cooled temperature-reduction unit, described air-cooled temperature-reduction unit comprises water tank, air-cooled coil pipe and hair-dryer, described water tank has two water inlets and two water delivering orifices, one of them water delivering orifice is connected by cooling line with a water inlet, described air-cooled coil pipe is arranged in described cooling line, for one section of pipeline section of described cooling line, described hair-dryer is just to air-cooled coil pipe, the wind of blowout is used for lowering the temperature to air-cooled coil pipe, cooling line is also provided with water pump, another water inlet of water tank respectively with high temperature First Heat Exchanger, in high temperature second heat interchanger, the outlet mouth of pipe of heat exchanger tube is connected, another water delivering orifice of water tank is connected with cooling main pipe rail, also water pump is provided with in described cooling main pipe rail, described cooling main pipe rail is at close high temperature First Heat Exchanger, two-way cooling bye-pass is divided into during high temperature the second heat interchanger, two-way cooling bye-pass respectively with high temperature First Heat Exchanger, in high temperature second heat interchanger, the import mouth of pipe of heat exchanger tube is connected.
3. flue gas in power station boiler low temperature acid dew piont corrosion experimental provision according to claim 2, is characterized in that: the heat exchanger tube in described high temperature First Heat Exchanger, high temperature second heat interchanger is finned tube, strengthens heat transfer effect.
4. the flue gas in power station boiler low temperature acid dew piont corrosion experimental provision according to any one of claims 1 to 3, it is characterized in that: described cryogenic heat exchanger, experimental section heat interchanger, all there is heat exchanger tube and detachable housing, facilitate deashing and inspection, cryogenic heat exchanger, experimental section heat interchanger is flue gas and walks shell side, water walks the shell-and-tube heat exchanger of tube side, described low temperature temperature reducing unit adopts water-cooled temperature reducing unit, described water-cooled temperature reducing unit comprises water cooling unit, described water cooling unit has two water inlets and a water delivering orifice, this water delivering orifice is connected with outfall sewer road, water pump is provided with in described outfall sewer road, described outfall sewer road is at close cryogenic heat exchanger, two-way outlet bye-pass is divided into during experimental section heat interchanger, two-way outlet bye-pass respectively with cryogenic heat exchanger, in experimental section heat interchanger, the import mouth of pipe of heat exchanger tube is connected, two water inlets of described water cooling unit respectively with cryogenic heat exchanger, in experimental section heat interchanger, the outlet mouth of pipe of heat exchanger tube is connected.
5. flue gas in power station boiler low temperature acid dew piont corrosion experimental provision according to claim 4, is characterized in that: the heat exchanger tube in described cryogenic heat exchanger, experimental section heat interchanger is finned tube, strengthens heat transfer effect.
6. flue gas in power station boiler low temperature acid dew piont corrosion experimental provision according to claim 1, it is characterized in that: described experiment porch is the U-shaped framework of horizontally disposed opening towards boiler flue, flue gas experiment pipeline is that horizontally disposed with U-shaped frame openings U-shaped pipeline in the same way, described flue gas experiment pipeline support is on described experiment porch.
7. flue gas in power station boiler low temperature acid dew piont corrosion experimental provision according to claim 1, it is characterized in that: it is the aerating mixer that shape in parallel is arranged that described experimental provision also has additional with boiler flue, can the various gases of splendid attire simulated experiment in this aerating mixer, the entrance point that pipeline is tested respectively by pipeline and described flue gas in the two ends of described aerating mixer is connected with endpiece, this aerating mixer experimental provision not in boiler flue site test time, various gas can be provided to carry out simulated experiment.
8. flue gas in power station boiler low temperature acid dew piont corrosion experimental provision according to claim 1, is characterized in that: described heating system is electric heating system, the flue gas that type of heating adopts heating tube or Resistant heating to flow through.
9. flue gas in power station boiler low temperature acid dew piont corrosion experimental provision according to claim 1, is characterized in that: described measurement and acquisition system comprise correspondence and be arranged on thermometer, tensimeter, flow velocity and flow sensor on each pipeline.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106442299A (en) * | 2016-11-23 | 2017-02-22 | 广东电网有限责任公司电力科学研究院 | Flue gas low-temperature corrosion detection system |
| CN106769814A (en) * | 2016-11-10 | 2017-05-31 | 广东电网有限责任公司电力科学研究院 | A kind of low-temperature corrosion detecting system and its detection method |
| CN106990026A (en) * | 2017-05-27 | 2017-07-28 | 山西大学 | A kind of experimental provision detected for flue gas acid dew point with grey reunion characteristic research |
| CN107144599A (en) * | 2017-06-30 | 2017-09-08 | 广东电网有限责任公司电力科学研究院 | A kind of flue gas acid dew point measurement apparatus |
| CN112763399A (en) * | 2020-12-28 | 2021-05-07 | 西安特种设备检验检测院 | Method for detecting flue gas corrosion risk area of low-temperature heating surface of boiler |
| CN112797432A (en) * | 2020-12-31 | 2021-05-14 | 大唐郓城发电有限公司 | Boiler flue gas waste heat degree of depth utilizes system |
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| CN107144599A (en) * | 2017-06-30 | 2017-09-08 | 广东电网有限责任公司电力科学研究院 | A kind of flue gas acid dew point measurement apparatus |
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| CN112763399A (en) * | 2020-12-28 | 2021-05-07 | 西安特种设备检验检测院 | Method for detecting flue gas corrosion risk area of low-temperature heating surface of boiler |
| CN112797432A (en) * | 2020-12-31 | 2021-05-14 | 大唐郓城发电有限公司 | Boiler flue gas waste heat degree of depth utilizes system |
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