CN104655549B - 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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- CN104655549B CN104655549B CN201510056433.3A CN201510056433A CN104655549B CN 104655549 B CN104655549 B CN 104655549B CN 201510056433 A CN201510056433 A CN 201510056433A CN 104655549 B CN104655549 B CN 104655549B
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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 power system flue gas in power station boiler cold end corrosion field, specifically refer to the acid of flue gas in power station boiler low temperature
Dew point corrosion experiment device.
Background technology
In view of country clearly proposes " to popularize waste heat overbottom pressure in an all-round way in waste heat overbottom pressure aboundresources industry during " 12 "
Recovery and utilization technology, advances the recycling of low-quality thermal source, forms the step comprehensive utilization of the energy." and restrict power station at present
The key of boiler smoke low temperature heat is the acid dew piont corrosion problem of metal material, if this problem cannot solve, that
The deep exploitation of fume afterheat is just difficult to.Low temperature acid dew piont corrosion during flue gas in power station boiler depth UTILIZATION OF VESIDUAL HEAT IN
Problem is a complicated physical and chemical process, needs the multi-subject knowledges such as integrated application chemistry, material, heat and mass, carries out many
Subject crossing research.At present, all thoroughly do not solve cold end corrosion mechanism problem both at home and abroad, conventional mitigation cold end corrosion measure is led to
Normal high cost, difficulty of processing are big, impact heat transfer property, and some then can only slow down but be difficult to thoroughly solve the problems, such as cold end corrosion.
Content of the invention
It is an object of the invention to provide flue gas in power station boiler low temperature acid dew piont corrosion experimental provision, this experimental provision is to solve
The popularization and application of the cold end corrosion problem of low-temperature coal economizer of boiler and novel corrosion-resistant corrosion material provide theoretical foundation and technical support.
The above-mentioned purpose of the present invention to be realized by following technical solution：Flue gas in power station boiler low temperature acid dew piont corrosion is surveyed
Experimental provision on probation it is characterised in that：This experimental provision includes experiment porch, flue gas experiment pipeline, Pitot tube tachymeter, fall
Warm system, heating system, air-introduced machine, measurement and acquisition system and control system, described flue gas test the entrance point of pipeline with
The port of export is connected with boiler air preheater rear pass, and Pitot tube tachymeter is arranged on the entrance point that flue gas tests pipeline, and flue gas is real
Test and the high temperature First Heat Exchanger being in series, high temperature second heat exchanger, low temperature are disposed with according to flow of flue gas direction on pipeline
Heat exchanger and experimental section heat exchanger, described high temperature First Heat Exchanger, high temperature second heat exchanger, cryogenic heat exchanger and residing
Pipeline constitutes cooling rectification section, and described heating system is arranged on flue gas experiment pipeline and is located at experimental section heat exchanger and boiler smoke
On pipeline section between road, described cooling system includes high temperature temperature reducing unit and low temperature temperature reducing unit, and described high temperature is lowered the temperature
Unit is connected with high temperature First Heat Exchanger, high temperature second heat exchanger respectively, for flowing through high temperature First Heat Exchanger, high temperature
The flue gas cool-down of two heat exchangers, described low temperature temperature reducing unit is connected with cryogenic heat exchanger and experimental section heat exchanger respectively,
For to the flue gas cool-down flowing through cryogenic heat exchanger and experimental section heat exchanger so that the flue gas in experimental section heat exchanger is down to 70
DEG C low temperature acid dew piont corrosion experimental temperature, low temperature acid dew piont corrosion is carried out to the pipeline material of experimental section heat exchanger and surveys
Examination, described air-introduced machine is located at the port of export that flue gas tests pipeline, and described heating system will flow through the flue gas after experimental section heat exchanger
After being heated to assigned temperature, introduced by air-introduced machine and send into boiler flue.
The experimental provision of the present invention, can deeply probe into formation and the influence condition of boiler tail flue gas cold end corrosion, survey
The corrosion resistance characteristic of examination material under different flue gas conditions, is low temperature heat and research base is set up in the corrosion-resistant research of low temperature
Plinth.
In the present invention, described high temperature First Heat Exchanger, high temperature second heat exchanger are respectively provided with heat exchanger tube and detachable
Housing, facilitate deashing and inspection, high temperature First Heat Exchanger, high temperature second heat exchanger are that flue gas walks shell side, water walks tube side
Shell-and-tube heat exchanger, described high temperature temperature reducing unit adopts air-cooled temperature-reduction unit, and described air-cooled temperature-reduction unit includes water
Case, air-cooled coil pipe and hair-dryer, described water tank has two water inlets and two delivery ports, one of delivery port and one
Water inlet is connected by cooling line, and described air-cooled coil pipe is arranged in described cooling line, is described cooling line
One section of pipeline section, just to air-cooled coil pipe, the wind of blowout is used for, to the cooling of air-cooled coil pipe, cooling line also setting up described hair-dryer
There are water pump, another water inlet outlet with heat exchanger tube in high temperature First Heat Exchanger, high temperature second heat exchanger respectively of water tank
Mouth is connected, and another delivery port of water tank is connected with cooling main pipe rail, is also equipped with water pump in described cooling main pipe rail, described
Cooling main pipe rail is divided into two-way cooling bye-pass, two-way cooling when near high temperature First Heat Exchanger, high temperature the second heat exchanger
Pipeline is connected with the import mouth of pipe of heat exchanger tube in high temperature First Heat Exchanger, high temperature second heat exchanger respectively.
High temperature temperature reducing unit in the present invention adopts air-cooled coil pipe to lower the temperature it is ensured that water temperature is constant.
In the present invention, the heat exchanger tube in described high temperature First Heat Exchanger, high temperature second heat exchanger is finned tube, and enhancing is changed
Thermal effect.
In the present invention, described cryogenic heat exchanger, experimental section heat exchanger, it is respectively provided with heat exchanger tube and detachable shell
Body, facilitates deashing and inspection, and cryogenic heat exchanger, experimental section heat exchanger are that flue gas walks shell side, water walks the pipe shell type heat exchange of tube side
Device, described low temperature temperature reducing unit adopts water-cooled temperature reducing unit, and described water-cooled temperature reducing unit includes water cooling unit, described water
Cold has two water inlets and a delivery port, and this delivery port is connected with outfall sewer road, arranges in described outfall sewer road
There is water pump, described outfall sewer road is divided into two-way outlet bye-pass when near cryogenic heat exchanger, experimental section heat exchanger, and two-way goes out
Mouth bye-pass is connected with the import mouth of pipe of heat exchanger tube in cryogenic heat exchanger, experimental section heat exchanger respectively, and the two of described water cooling unit
Individual water inlet is connected with the outlet mouth of pipe of heat exchanger tube in cryogenic heat exchanger, experimental section heat exchanger respectively.
Low temperature temperature reducing unit in the present invention adopts water cooling unit to lower the temperature it is ensured that water temperature is constant.
In the present invention, the heat exchanger tube in described cryogenic heat exchanger, experimental section heat exchanger is finned tube, strengthens heat exchange effect
Really.
In the present invention, described experiment porch is the U-frame frame towards boiler flue for the horizontally disposed opening, and flue gas is tested
Pipeline is horizontally disposed and U-shaped frame openings U-tube road in the same direction, and described flue gas experiment pipeline support is in described experiment
On platform.
In the present invention, it is in the aerating blender that shape in parallel is arranged that described experimental provision also has additional with boiler flue, should
Can contain the various gases of simulated experiment in aerating blender, the two ends of described aerating blender pass through respectively pipeline with described
The entrance point that flue gas tests pipeline is connected with the port of export, and this aerating blender is in experimental provision not in boiler flue field test
When, using the teaching of the invention it is possible to provide various gases are simulated experiment.
In the present invention, described heating system is electric heating system, and mode of heating adopts heating tube or Resistant heating stream
The flue gas of warp.
In the present invention, thermometer that described measurement and acquisition system include being correspondingly arranged on each pipeline, pressure gauge, stream
Speed and flow sensor.
Compared with prior art, the present invention can solve the problem that the cold end corrosion of heated surface at the end of boiler during burning inferior coal is asked
Topic, experimental provision provided by the present invention is not only able to directly and station boiler flue is connected to experiment it is also possible to simulation is real
Border low-temperature coal economizer of boiler flue gas flow field, can deeply probe into formation and the influence condition of boiler tail flue gas cold end corrosion, survey
The corrosion resistance characteristic of examination material under different flue gas conditions, is low temperature heat and research base is set up in the corrosion-resistant research of low temperature
Plinth.
Brief description
With reference to the accompanying drawings and detailed description the present invention is described in further details.
Fig. 1 is the overall structure 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 top 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：
1st, experiment porch；2nd, flue gas experiment pipeline；2a, entrance point；2b, the port of export；
3rd, boiler flue；4th, aerating blender；5th, Pitot tube tachymeter；6th, high temperature First Heat Exchanger；
7th, high temperature second heat exchanger；8th, hair-dryer；9th, air-cooled coil pipe；10th, water tank；
11st, cooling line；12nd, cooling main pipe rail；13rd, water pump；14th, water pump；
15th, cryogenic heat exchanger；16th, experimental section heat exchanger；17th, water cooling unit；18th, outfall sewer road；
19th, water pump；20th, heating system；21st, air-introduced machine
Specific embodiment
Flue gas in power station boiler low temperature acid dew piont corrosion experimental provision as shown in Figure 1 and Figure 2, this experimental provision includes testing
Platform 1, flue gas experiment pipeline 2, Pitot tube tachymeter 5, cooling system, heating system 20, air-introduced machine 21, measurement and acquisition system
And control system, experiment porch 1 is the U-frame frame towards boiler flue 3 for the horizontally disposed opening, and this experiment porch 1 also has
There is mobile support, be easy to move, flue gas experiment pipeline 2 is horizontally disposed and U-shaped frame openings U-tube road in the same direction, to protect
Confirm that testing flue gas flow field meets requirement, flue gas experiment pipeline 2 support is on experiment porch 1.
The entrance point 2a that flue gas tests pipeline 2 is connected with boiler flue 3 with port of export 2b, specifically with boiler air preheater
Rear pass is connected, and Pitot tube tachymeter 5 is arranged on the entrance point 2a that flue gas tests pipeline 2, according to cigarette on flue gas experiment pipeline 2
Flow of air direction be disposed with the high temperature First Heat Exchanger 6 being in series, high temperature the second heat exchanger 7, cryogenic heat exchanger 15 and
Experimental section heat exchanger 16, high temperature First Heat Exchanger 6, high temperature the second heat exchanger 7, cryogenic heat exchanger 15 and residing pipeline are constituted
Cooling rectification section, heating system 20 is arranged on flue gas experiment pipeline 2 and is located between experimental section heat exchanger 16 and boiler flue 3
On pipeline section.
Cooling system includes high temperature temperature reducing unit and low temperature temperature reducing unit, and high temperature temperature reducing unit is changed with high temperature first respectively
Hot device 6, high temperature the second heat exchanger 7 are connected, for the flue gas fall flowing through high temperature First Heat Exchanger 6, high temperature the second heat exchanger 7
Temperature, low temperature temperature reducing unit is connected with cryogenic heat exchanger 15 and experimental section heat exchanger 16 respectively, for flowing through low-temperature heat exchange
The flue gas cool-down of device 15 and experimental section heat exchanger 16 is so that the flue gas in experimental section heat exchanger 16 is down to 70 DEG C of low temperature acid dew
Spot corrosion experimental temperature, carries out low temperature acid dew piont corrosion to the pipeline material of experimental section heat exchanger 16 and tests, air-introduced machine
21 are located at the port of export 2b that flue gas tests pipeline 2, and heating system 20 will flow through the flue gas after experimental section heat exchanger 16 to finger
After constant temperature degree, feeding boiler flue 3 is introduced by air-introduced machine 21.
In the present embodiment, high temperature First Heat Exchanger 6 and its residing pipeline are I section of rectification of cooling, high temperature the second heat exchanger 7
And its residing pipeline is II section of rectification of cooling, cryogenic heat exchanger 15 and its residing pipeline are III section of rectification of cooling, and cooling is whole
I section of stream, II section of rectification of cooling and III section of rectification of cooling constitute whole cooling rectification section.Experimental section heat exchanger 16 and its institute
The pipeline at place is experimental section.
In the present embodiment, high temperature First Heat Exchanger 6, high temperature the second heat exchanger 7, cryogenic heat exchanger 15 and experimental section heat exchanger
16 are respectively provided with heat exchanger tube and detachable housing, facilitate deashing and inspection, high temperature First Heat Exchanger 6, high temperature second heat exchange
Device 7, cryogenic heat exchanger 15 and experimental section heat exchanger 16 are that flue gas walks shell side, water walks the shell-and-tube heat exchanger of tube side, high temperature
Heat exchanger tube in one heat exchanger 6, high temperature the second heat exchanger 7, cryogenic heat exchanger 15 and experimental section heat exchanger 16 is finned tube, increases
Strong heat transfer effect.
High temperature temperature reducing unit adopts air-cooled temperature-reduction unit, and air-cooled temperature-reduction unit includes water tank 10, air-cooled coil pipe 9 and blows
Blower fan 8, water tank 10 has two water inlets and two delivery ports, and one of delivery port and a water inlet pass through cooling tube
Road 11 is connected, and air-cooled coil pipe 9 is arranged in cooling line 11, is 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 additionally provided with water pump 13, another of water tank 10 enters
The mouth of a river is connected with the outlet mouth of pipe of heat exchanger tube in high temperature First Heat Exchanger 6, high temperature the second heat exchanger 7 respectively, water tank 10 another
One delivery port is connected with cooling main pipe rail 12, is also equipped with water pump 14, cooling main pipe rail 12 is close in cooling main pipe rail 12
Be divided into when high temperature First Heat Exchanger 6, high temperature the second heat exchanger 7 two-way cooling bye-pass, two-way cooling bye-pass respectively with high temperature
In First Heat Exchanger 6, high temperature the second heat exchanger 7, the import mouth of pipe of heat exchanger tube is connected.
Low temperature temperature reducing unit adopts water-cooled temperature reducing unit, and water-cooled temperature reducing unit includes water cooling unit 17, and water cooling unit 17 has
There are two water inlets and a delivery port, this delivery port is connected with outfall sewer road 18, is provided with water pump in outfall sewer road 18
19, outfall sewer road 18 is divided into two-way outlet bye-pass, two-way outlet when near cryogenic heat exchanger 15, experimental section heat exchanger 16
Bye-pass is connected with the import mouth of pipe of heat exchanger tube in cryogenic heat exchanger 15, experimental section heat exchanger 16 respectively, states water cooling unit 17
Two water inlets are connected with the outlet mouth of pipe of heat exchanger tube in cryogenic heat exchanger 15, experimental section heat exchanger 16 respectively.
Heating system 20 is electric heating system, the flue gas that mode of heating is flowed through using Resistant heating, it would however also be possible to employ plus
The flue gas that heat pipes heat flows through.Thermometer that measurement and acquisition system include being correspondingly arranged on each pipeline, pressure gauge, flow velocity and
Flow sensor, and by PLC, parameters are acquired.
3 water pump structures in the present embodiment are identical, lift 15m, and ventilated disc tube power is 15kw, and water-cooled acc power is
3kw, applies corrosion-proof wear-resistant material in air-introduced machine 21, specification is 1000m3/h, 1500Pa.
Control system includes switch board, and separately joins movable supporting frame, and switch board comprises associated electrical components, only needs during installation
Access power supply toward switch board, just can carry out the experiment of whole system.Switch board is controlled and is controlled using PLC, according to each section of outlet cigarette
Temperature adjusts inflow and heating amount at any time it is ensured that control accuracy is ± 1 DEG C, and real time record experiment parameter.Need the ginseng controlling
Number has：High temperature First Heat Exchanger 6, high temperature the second heat exchanger 7, cryogenic heat exchanger 15, experimental section heat exchanger 16 and heating system
20 outlet cigarette temperature, and the water temperature in water tank 10, water cooling unit 17.
In the present embodiment, air-introduced machine adopts VFC, the electronic valve regulating flow of water pump.
When the experimental provision of the present invention is directly connected to boiler flue 3, flue gas flow is：Boiler flue 3>Pitot tube is surveyed
Fast instrument 5>The cooling rectification section that high temperature First Heat Exchanger 6, high temperature the second heat exchanger 7, cryogenic heat exchanger 15 are formed>Experimental section
Heat exchanger 16>Heating system 20>Air-introduced machine 21>Boiler flue 3.
The process when carrying out the experiment of low temperature acid dew piont corrosion for the experimental provision of the present invention is as follows：Boiler smoke is from boiler smoke
Road 3 is drawn, flue-gas temperature T=140 DEG C now, and flue gas flows through high temperature First Heat Exchanger 6, passes through after high temperature the second heat exchanger 7
High temperature temperature reducing unit is lowered the temperature to flue gas, makes flue-gas temperature be down to T=105 DEG C, enters cryogenic heat exchanger 15 afterwards, makes flue gas
Temperature is down to T=90 DEG C, then passes through experimental section heat exchanger 16, by the precise control of cigarette temperature so that experimental section heat exchanger 16
Interior flue gas is down to 50-80 DEG C of low temperature acid dew piont corrosion experimental temperature so as to reach the temperature of requirement of experiment.
Cooling system includes high temperature temperature reducing unit and low temperature temperature reducing unit, and high temperature temperature reducing unit adopts air-cooled temperature-reduction list
Unit, high temperature temperature descending section water temperature is 65 DEG C, is lowered the temperature it is ensured that water temperature is constant using air-cooled coil pipe 9；Low temperature temperature descending section water temperature is 50 DEG C,
Lowered the temperature it is ensured that water temperature is constant using water cooling unit 17；Experimental section heat exchanger 16 according to the requirement of different experiments to flue gas acid dew point and
Pipeline material is tested, and coolant water temperature is arranged as 50-80 DEG C, by carrying out low temperature acid dew point to the pipeline material of experimental section heat exchanger
Corrosivity is tested, and obtains the low temperature acid dew piont corrosion experiment feelings that experimental section inner tube of heat exchanger road is 70 DEG C in flue-gas temperature
Condition, the popularization and application for solving the problems, such as the cold end corrosion of boiler smoke low-level (stack-gas) economizer and novel corrosion-resistant corrosion material provide theoretical according to
According to technical support；Electric heater will flow through the flue gas after experimental section heat exchanger 16 to after 140 DEG C of assigned temperature, by air inducing
Machine 21 is introduced into boiler flue 3.
So that low temperature acid dew point anticorrosion experiment can not carried out yet when boiler flue 3 scene, the present invention is permissible
Introduce aerating blender 4, that is, experimental provision does following improvement：It is in shape setting in parallel that experimental provision also has additional with boiler flue 3
Aerating blender 4, various gases of simulated experiment can be contained in this aerating blender 4, the two ends of aerating blender 4 are respectively
It is connected by entrance point 2a and port of export 2b that pipeline tests pipeline 2 with flue gas, this aerating blender 4 does not exist in experimental provision
During boiler flue 3 field test, using the teaching of the invention it is possible to provide various gases are simulated experiment.
Introducing aerating blender 4 makes the experimental provision of the present invention have wider application space, you can directly to connect
The field experiment that boiler flue 3 carries out low-temperature flue gas corrosion carries out the corrosive mould of low-temperature flue gas it is also possible to connect aerating blender 4
Draft experiment.
When the experimental provision of the present invention is not tested at the scene, is directly connected to aerating blender 4, flue gas flow is：Aerating
Blender 4>Pitot tube tachymeter 5>High temperature First Heat Exchanger 6, high temperature the second heat exchanger 7, cryogenic heat exchanger 15 are formed
Cooling rectification section>Experimental section heat exchanger 16>Heating system 20>Air-introduced machine 21>Aerating blender 4.
The above embodiment of the present invention is not limiting the scope of the present invention, and embodiments of the present invention are not limited to
This, all this kind according to the above of the present invention, according to ordinary technical knowledge and the customary means of this area, without departing from this
Under the premise of inventing above-mentioned basic fundamental thought, modification, replacement or the change of other various ways that said structure of the present invention is made
More, all should fall within the scope and spirit of the invention.
Claims (9)
1. flue gas in power station boiler low temperature acid dew piont corrosion experimental provision it is characterised in that：This experimental provision includes experiment porch, cigarette
Gas experiment pipeline, Pitot tube tachymeter, cooling system, heating system, air-introduced machine, measurement and acquisition system and control system,
The entrance point that described flue gas tests pipeline is connected with boiler air preheater rear pass with the port of export, and Pitot tube tachymeter is arranged on cigarette
Gas tests the entrance point of pipeline, flue gas experiment pipeline is disposed with the high temperature being in series first according to flow of flue gas direction and changes
Hot device, high temperature second heat exchanger, cryogenic heat exchanger and experimental section heat exchanger, described high temperature First Heat Exchanger, high temperature second change
Hot device, cryogenic heat exchanger and residing pipeline constitute cooling rectification section, and described heating system is arranged on flue gas experiment tube
Road is located on pipeline section between experimental section heat exchanger and boiler flue, and described cooling system includes high temperature temperature reducing unit and low
Warm temperature reducing unit, described high temperature temperature reducing unit is connected with high temperature First Heat Exchanger, high temperature second heat exchanger, respectively for right
Flow through high temperature First Heat Exchanger, the flue gas cool-down of high temperature second heat exchanger, described low temperature temperature reducing unit respectively with low-temperature heat exchange
Device and experimental section heat exchanger are connected, for the flue gas cool-down flowing through cryogenic heat exchanger and experimental section heat exchanger so that
Flue gas in experimental section heat exchanger is down to 70 DEG C of low temperature acid dew piont corrosion experimental temperature, the pipeline material to experimental section heat exchanger
Carry out low temperature acid dew piont corrosion characteristic to be tested, described air-introduced machine is located at the port of export that flue gas tests pipeline, described heating system
System will flow through the flue gas after experimental section heat exchanger to after assigned temperature, sends into boiler flue by air-introduced machine.
2. flue gas in power station boiler low temperature acid dew piont corrosion experimental provision according to claim 1 it is characterised in that：Described
High temperature First Heat Exchanger, high temperature second heat exchanger are respectively provided with heat exchanger tube and detachable housing, facilitate deashing and inspection, high
Warm First Heat Exchanger, high temperature second heat exchanger are that flue gas walks shell side, water walks the shell-and-tube heat exchanger of tube side, described high temperature drop
Warm unit adopts air-cooled temperature-reduction unit, and described air-cooled temperature-reduction unit includes water tank, air-cooled coil pipe and hair-dryer, described water
Case has two water inlets and two delivery ports, and one of delivery port and a water inlet are connected by cooling line,
Described air-cooled coil pipe is arranged in described cooling line, is one section of pipeline section of described cooling line, and described hair-dryer is just right
Air-cooled coil pipe, the wind of blowout is used for, to the cooling of air-cooled coil pipe, cooling line being additionally provided with water pump, another water inlet of water tank
It is connected with the outlet mouth of pipe of heat exchanger tube in high temperature First Heat Exchanger, high temperature second heat exchanger respectively, another water outlet of water tank
Mouth is connected with cooling main pipe rail, is also equipped with water pump in described cooling main pipe rail, and described cooling main pipe rail is near high temperature first
Be divided into when heat exchanger, high temperature the second heat exchanger two-way cooling bye-pass, two-way cooling bye-pass respectively with high temperature First Heat Exchanger,
In high temperature second heat exchanger, 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 it is characterised in that：Described height
Heat exchanger tube in warm First Heat Exchanger, high temperature second heat exchanger 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, its feature exists
In：Described cryogenic heat exchanger, experimental section heat exchanger, are respectively provided with heat exchanger tube and detachable housing, facilitate deashing and inspection
Look into, cryogenic heat exchanger, experimental section heat exchanger are that flue gas walks shell side, water walks the shell-and-tube heat exchanger of tube side, described low temperature fall
Warm unit adopts water-cooled temperature reducing unit, and described water-cooled temperature reducing unit includes water cooling unit, and described water cooling unit has two and enters
The mouth of a river and a delivery port, this delivery port is connected with outfall sewer road, is provided with water pump, described water outlet in described outfall sewer road
Main pipe rail near cryogenic heat exchanger, experimental section heat exchanger when be divided into two-way outlet bye-pass, two-way outlet bye-pass respectively with
In cryogenic heat exchanger, experimental section heat exchanger, the import mouth of pipe of heat exchanger tube is connected, two water inlets of described water cooling unit respectively with
In cryogenic heat exchanger, experimental section heat exchanger, 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 it is characterised in that：Described low
Heat exchanger tube in warm heat exchanger, experimental section heat exchanger 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 characterised in that：Described
Experiment porch is the U-frame frame towards boiler flue for the horizontally disposed opening, and flue gas experiment pipeline is horizontally disposed and U-frame
Frame opening U-tube road in the same direction, 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 characterised in that：Described
It is in the aerating blender that shape in parallel is arranged that experimental provision also has additional with boiler flue, can contain simulation real in this aerating blender
The various gases tested, the two ends of described aerating blender are passed through pipeline respectively and are tested the entrance point of pipeline with described flue gas and go out
Mouth end is connected, and this aerating blender is not when experimental provision is in boiler flue field test, using the teaching of the invention it is possible to provide various gases are carried out
Simulated experiment.
8. flue gas in power station boiler low temperature acid dew piont corrosion experimental provision according to claim 1 it is characterised in that：Described
Heating system is electric heating system, the flue gas that mode of heating is flowed through using heating tube or Resistant heating.
9. flue gas in power station boiler low temperature acid dew piont corrosion experimental provision according to claim 1 it is characterised in that：Described
Measurement and acquisition system include the thermometer, pressure gauge, flow velocity and the flow sensor that are correspondingly arranged on each pipeline.
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| CN106769814B (en) * | 2016-11-10 | 2023-03-31 | 广东电网有限责任公司电力科学研究院 | Low-temperature corrosion detection system and detection method thereof |
| CN106442299B (en) * | 2016-11-23 | 2023-04-18 | 广东电网有限责任公司电力科学研究院 | Flue gas low temperature corrosion detecting system |
| 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 |
| CN107144599B (en) * | 2017-06-30 | 2023-05-12 | 南方电网电力科技股份有限公司 | Flue gas acid dew point measuring device |
| CN112763399B (en) * | 2020-12-28 | 2021-09-21 | 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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