CN104914036B - A kind of pipeline corrosion resistance characteristic pilot system - Google Patents
A kind of pipeline corrosion resistance characteristic pilot system Download PDFInfo
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- CN104914036B CN104914036B CN201510369068.1A CN201510369068A CN104914036B CN 104914036 B CN104914036 B CN 104914036B CN 201510369068 A CN201510369068 A CN 201510369068A CN 104914036 B CN104914036 B CN 104914036B
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Abstract
The present invention relates to a kind of pipeline corrosion resistance characteristic pilot system.The invention provides a kind of pilot system of Mobile low-temperature corrosion resistance characteristic, the system is made up of buffer tank, ball-cock assembly, stop valve, water pump, triple valve, thermal resistance, experiment welding tubing, test section, hot and cold water header and control loop etc..Compared with prior art, the present invention can according to the height of hot water or cold water's temperature of incoming flow, and with reference to thermal resistance test feedback result come instruct adjustment three-way control valve door aperture, with ensure mixing after water temperature stability in setting value；Welded by by the close tubing of different metal material, caliber, constituted new circulation duct, and convenience is connected with experiment framework；The control of tube wall temperature is realized by the method for water flow temperature in control pipe；By control system, the shortening test period can be reached with economic, the efficient experimental test for realizing flue gas corrosion tubing, reduce experimentation cost, the purpose of short form test flow.
Description
Technical field
The present invention relates to the characteristic test field of industrial afterheat recovery heat exchanger pipeline, in particular it relates to a kind of pipeline
Corrosion resistance characteristic pilot system.
Background technology
Power-saving technology is an important ring in the adjustment of current Industry Structure, as in national energy policy
One fundamental state policy, has important practical significance.It is to work as prosthomere that low-temperature flue gas waste heat in waste heat boiler back-end ductwork is reclaimed
Important development direction in energy technology, with wide market prospects.
Low-temperature flue gas waste heat reclaims the recovery that energy is mainly realized by heat change method, at present a large amount of heat exchange for using
Equipment matter is carbon steel, ND steel, 304 stainless steels, 316 stainless steels etc., because material has larger difference in price, is coveted
It is big that the corrosion resistance of material can cause transformation project to be invested, and return period is long, is unfavorable for the development of project, but if using valency
The cheap material of lattice, then can directly face the problem of flue gas corrosion, the corrosion process may cause heat exchange pipeline " run, emit,
Drop, leakage ", directly causes piping failure, disabler, or even destruction miscellaneous equipment when serious, cause serious economic loss, comprehensive
The economy and security for considering transformation project are closed, is not difficult to find out, the etching problem of low-temperature flue gas exchange hot channel is that decision is low
The reducing energy consumption project success whether key of warm fume afterheat, and presently relevant tubing corrosion resistance test parameter is short of very much.
In the prior art, a kind of gas attack is disclosed in the Chinese patent application of Application No. 201310472773.5 special
System safety testing device, gas attack characteristic and aerochemistry composition, temperature, the flow velocity of gas etc. are more under the device energy researching high-temperature
Gas associating corrosiveness under the comprehensive function of factor, particularly high temperature.But, the wall of the uncontrollable lacing film material of the device
Temperature, and material temperature changes with gas temperature.Disclosed in the Chinese patent application of Application No. 201310436963.1
A kind of high-temperature corrosion in boiler characteristic measurement method and system, the method obtain boiler under various loads using burning numerical model
Etching characteristic parameter, the method be only limitted to using numerical computation method be used for predict etching characteristic parameter, it is impossible to obtain low temperature
The corrosion resistance characteristic of metal material under flue gas environment.
The content of the invention
For defect of the prior art, it is an object of the invention to provide a kind of pipeline corrosion resistance characteristic pilot system.
According to a kind of pipeline corrosion resistance characteristic pilot system that the present invention is provided, for testing tubing in waste heat boiler afterbody
Corrosion resistance characteristic in flue, including：Cold water header, hot water header, three-way control valve, temperature measurement and control instrument, heat exchanger tube to be measured；
The cooling water outlet of the cold water header is connected to the first water inlet of three-way control valve, the hot water of the hot water header
Outlet is connected to the second water inlet of the three-way control valve, and the delivery port of the three-way control valve is connected to the heat exchange to be measured
Pipe, the temperature measurement and control instrument installs the delivery port with the three-way control valve, and the heat exchanger tube to be measured is arranged at waste heat boiler
In back-end ductwork；
The temperature measurement and control instrument is used for described in the delivery port water temperature control of the three-way control valve obtained according to detection
The valve opening of the first water inlet and/or the second water inlet, the delivery port water temperature for making the three-way control valve is preset temperature；
Into the current in the heat exchanger tube to be measured by the flue gas in the heat exchanger tube to be measured and waste heat boiler back-end ductwork
Heat exchange is realized, the heat exchanger tube to be measured is by the flue gas corrosion.
Used as a kind of prioritization scheme, the heat exchanger tube to be measured is the straight tube that at least one metal pipe material head and the tail are welded successively
Road.
As a kind of prioritization scheme, also including water outlet header and water recovery tank, the delivery port connection of the heat exchanger tube to be measured
To the water inlet of the water outlet header, the delivery port of the water outlet header is connected to the water recovery tank.
Used as a kind of prioritization scheme, the three-way control valve is 4, and the temperature measurement and control instrument is 4, described to be measured to change
Heat pipe is 4；
The delivery port of each three-way control valve is connected respectively to 1 heat exchanger tube to be measured, and each described three
The delivery port of logical regulating valve is provided with a temperature measurement and control instrument；
The described default water temperature of the delivery port of 4 three-way control valves is different.
As a kind of prioritization scheme, also including buffer tank, the entrance of the buffer tank include the first hot water inlet and
Second hot water inlet, the external boiler feed outlet pipe of the first hot water inlet, the external preheater of the second hot water inlet
Outlet pipe, the delivery port of the buffer tank is connected to the water inlet of the hot water header；
After water in the boiler feed outlet pipe and/or preheater outlet pipe flows into the buffer tank mixing buffering
By in the delivery port inflow hot water header of the buffer tank.
Used as a kind of prioritization scheme, first hot water inlet is provided with the first stop valve；Second hot water inlet is provided with
Ball-cock assembly, the float of the ball-cock assembly is floated on the water surface of the buffer tank.
As a kind of prioritization scheme, bimetallic thermometer is provided with the buffer tank, the bimetallic thermometer is used to examine
Survey the water temperature of the buffer tank；
The buffer tank top is additionally provided with blast pipe and overfall.
Used as a kind of prioritization scheme, the delivery port of the buffer tank passes through a thermal source water pump and the hot water header phase
Even, the thermal source water pump is used to be evacuated to the water in the buffer tank in the hot water header；
The delivery port of the buffer tank is additionally provided with the second stop valve.
Used as a kind of prioritization scheme, the temperature measurement and control instrument includes thermal resistance and DCS control systems；The thermal resistance sets
In the current of the delivery port of the three-way control valve；
The thermal resistance is in real time transmitted to the DCS controls Monitoring Data of the delivery port water temperature of the three-way control valve
System, the DCS control systems compare afterwards to described first the delivery port water temperature of the three-way control valve with the preset temperature
The valve opening of water inlet and/or the second water inlet carries out the control.
As the delivery port that a kind of prioritization scheme, the cold water header pass through the external cold water tank of low-temperature receiver water pump, the cold water
The delivery port of tank is provided with the 3rd stop valve.
Compared with prior art, the present invention has following beneficial effect：
1. there is the characteristics of testing efficiency is high, wall surface temperature controllability is good, Multiple Type and batch are detected simultaneously, can be big
The big time for saving test and human cost, economy are greatly improved；
2. use and be suitable for different live thermal source operating modes, it is not necessary in laboratory simulation field condition, and ensure former system
The safe operation of system；
3. can be according to the stability of live heat source temperature, the otherness of pressure and duty parameter, by setting buffered water
Case realizes stablizing relatively for pilot system heat source temperature and pressure, it is ensured that the global controllability and experiment accuracy of system；
4. use real-time control and reponse system, it is ensured that the real-time adjustment under extraneous disturbed condition, improve system
Antijamming capability；
5. realize under identical flue-gas temperature, the corrosion of different wall temperatures, different metal materials under certain specific flue gas condition
Situation, the features such as with simple, convenient, multi-state.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will use needed for embodiment description
Accompanying drawing be briefly described, it is therefore apparent that drawings in the following description are only some embodiments of the present invention, for ability
For field technique personnel, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.It is attached
In figure：
Fig. 1 is a kind of pipeline corrosion resistance characteristic test system architecture principle schematic；
Fig. 2 is trial curve figure；
Wherein, 1 is buffer tank, and 2 is ball-cock assembly, and 3 is the first stop valve, and 4 is blast pipe, and 5 is overfall, and 6 is double gold
Category thermometer, 7 is the delivery port of buffer tank, and 8 is the second stop valve, and 9 is thermal source water pump, and 10 is the 3rd stop valve, and 11 is cold
Source water pump, 12 is cold water header, and 13 is hot water header, and 14 is three-way control valve, and 15 is temperature measurement and control instrument, and 16 is heat exchange to be measured
Pipe, 17 is test section, and 18 is water outlet header, and 19 is the control loop of temperature measurement and control instrument.
Specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail in the way of specific embodiment.Following examples will be helpful to
Those skilled in the art further understands the present invention, but the invention is not limited in any way.It should be pointed out that can be with
Using other embodiments, or modification structurally and functionally is carried out to embodiment enumerated herein, without departing from this hair
Bright scope and spirit.
Can be used to studying the corrosion-resistant of metal material under live low-temperature flue gas environment it is an object of the invention to provide a kind of
The pilot system and method for characteristic, in the prior art cannot on-line measurement difference flue gas and metal material temperature-controllable bar with solution
Corrosion resistance characteristic problem under part, while can also be used as laboratory study test platform, with good versatility.
A kind of pilot system of Mobile low-temperature corrosion resistance characteristic, the system is far longer than based on the tubing water side coefficient of heat transfer
The fact that the fume side coefficient of heat transfer, in gas-water heat transfer process, the temperature of metal wall passes through close to water effluent temperature
Water temperature realizes the control to tube wall temperature in adjustment and control pipe.
In a kind of pipeline of the corrosion resistance characteristic provided by the present invention for test tubing in waste heat boiler back-end ductwork
In the embodiment of corrosion resistance characteristic pilot system, as shown in figure 1, including：Cold water header 12, hot water header 13, three-way control valve
14th, temperature measurement and control instrument 15, heat exchanger tube to be measured 16；
The cooling water outlet of the cold water header 12 is connected to the first water inlet of three-way control valve 14, the hot water header 13
Hot water outlet be connected to the second water inlet of the three-way control valve 14, the delivery port of the three-way control valve 14 is connected to institute
Heat exchanger tube to be measured 16 is stated, the temperature measurement and control instrument 15 installs the delivery port with the three-way control valve 14, the heat exchange to be measured
Pipe 16 is arranged in waste heat boiler back-end ductwork；
The temperature measurement and control instrument 15 is used for the delivery port water temperature control of the three-way control valve 14 obtained according to detection
The valve opening of first water inlet and/or the second water inlet, makes the delivery port water temperature of the three-way control valve 14 be default
Temperature；
Into the current in the heat exchanger tube to be measured 16 by the heat exchanger tube to be measured 16 and waste heat boiler back-end ductwork
Flue gas realizes heat exchange, and the heat exchanger tube to be measured 16 is by the flue gas corrosion.
Three-way control valve 14 uses the confluent structure of Two In and One Out, and two-way import connects cool and heat ends water source respectively, through valve
After regulation, hot and cold water is mixed into corresponding temperature value, and the heat exchanger tube to be measured that correspondence is installed is entered via delivery port, and in delivery port
Place sets thermal resistance 15, and the mixed water temperature of the delivery port of real-time monitoring three-way control valve 14 ties up it to make corresponding adjustment in real time
Hold in default water temperature.
Used as a kind of embodiment, the heat exchanger tube to be measured 16 is the straight tube that at least one metal pipe material head and the tail are welded successively
Road.
For different tested tubing, a straight heat exchanger tube is spliced into by the form welded, forms dismountable examination
Test with heat exchanger tube to be measured 16, its two ends be connected with flange with system testing section 17, the spliced total length of heat exchanger tube to be measured 16 and
The length in reserve of test section 17 is consistent, while ensure that its inside and outside footpath size is basically identical with other calibers of pilot system,
Prevent obvious flow regime change, cause test error, the live kiln of overall insertion of heat exchanger tube to be measured 16 of test section 17
In the flue gas system of stove back-end ductwork, the flue gas enough meets the test requirements document of less than 200 degrees Celsius of low-temperature flue gas environment.
Used as a kind of embodiment, also including water outlet header 18 and water recovery tank, the delivery port of the heat exchanger tube to be measured 16 connects
The water inlet of the water outlet header 18 is connected to, the delivery port of the water outlet header 18 is connected to the water recovery tank.
Into each autonomous channel of three-way control valve 14 through heat exchanger tube to be measured 16 after, into water outlet header 18, and finally arrange
It is put into the water recovery tank, water resource is rationally reclaimed.
Used as a kind of embodiment, the three-way control valve 14 is 4, and the temperature measurement and control instrument 15 is 4, described to be measured
Heat exchanger tube 16 is 4；
The delivery port of each three-way control valve 14 is connected respectively to 1 heat exchanger tube to be measured 16, each institute
The delivery port for stating three-way control valve 14 is provided with a temperature measurement and control instrument 15；
The described default water temperature of the delivery port of 4 three-way control valves 14 is different.
15, heat exchanger tube to be measured 16 of each three-way control valve 14 and a temperature measurement and control instrument is corresponding.
As a kind of embodiment, also including buffer tank 1, the entrance of the buffer tank 1 include the first hot water inlet and
Second hot water inlet, the external boiler feed outlet pipe of the first hot water inlet, the external preheater of the second hot water inlet
Outlet pipe, the delivery port 7 of the buffer tank 1 is connected to the water inlet of the hot water header 13；
Water in the boiler feed outlet pipe and/or preheater outlet pipe flows into the mixing of buffer tank 1 buffering
In flowing into the hot water header 13 by the delivery port 7 of the buffer tank 1 afterwards.
For the unmatched problem of Heat-Source Parameters in actual field, the present embodiment employs buffer tank 1 to carry out thermal source
Lower water temperature, for the hot water for being slightly above 100 DEG C, can directly realize the function of step-down cooling, it is ensured that experiment by buffer tank 1
The stable operation of device；For the hot water far above 100 DEG C, can be by blending part warm water or cold water, to reduce excessive sudden strain of a muscle
Steam vapour losses, energy saving resource and water resource.
Used as a kind of embodiment, first hot water inlet is provided with the first stop valve 3；Second hot water inlet is provided with floating
Ball valve 2, the float of the ball-cock assembly 2 is floated on the water surface of the buffer tank 1.
As a kind of embodiment, bimetallic thermometer 6 is provided with the buffer tank 1, the bimetallic thermometer 6 is used to examine
Survey the water temperature of the buffer tank 1；The top of the buffer tank 1 is additionally provided with blast pipe 4 and overfall 5.
In order to ensure the stabilization of thermal source, in addition to the first hot water inlet, the second hot water inlet, delivery port, separately at the top of it
Blast pipe 4 and overfall 5 are set, and wherein thermal source is controlled thermal source pipeline using ball-cock assembly 2 all the way, it is ensured that can be protected in load variations
Card system water is matched, and downstream water pump will not be caused to be damaged because of water shortage, it is ensured that the safe operation of system.
Used as a kind of embodiment, the delivery port 7 of the buffer tank 1 passes through a thermal source water pump 9 and the hot water header 13
It is connected, the thermal source water pump 9 is used to be evacuated to the water in the buffer tank 1 in the hot water header 13；
The delivery port 7 of the buffer tank 1 is additionally provided with the second stop valve 8.
High-temperature-hot-water（>100℃）From boiler feed outlet pipe, such as oxygen-eliminating device uses sliding pressure operation, then the pressure of hot water
Power changes with the fluctuation of boiler load, suitable aperture can be arrived by adjustable cut-off valve 3 when buffer tank is introduced, to ensure to remove
Oxygen device 92 DEG C of buffer tank water temperature in underload, the water temperature that another route preheater outlet pipe is introduced is generally in 50 ~ 95 DEG C of models
Interior fluctuation is enclosed, therefore flow control is carried out using ball-cock assembly 2, while protecting downstream water pump safety.In addition, in order to ensure buffering
Water tank safe and stable operation, sets blast pipe 4, overfall 5 and bimetallic thermometer 6, and hot water is then discharged via delivery port 7.
Used as a kind of embodiment, the temperature measurement and control instrument 15 includes thermal resistance and DCS control systems；The thermal resistance sets
In the current of the delivery port of the three-way control valve 14；
The thermal resistance is in real time transmitted to the DCS controls Monitoring Data of the delivery port water temperature of the three-way control valve 14
System processed, the DCS control systems compare afterwards to described the delivery port water temperature of the three-way control valve 14 with the preset temperature
The valve opening of the first water inlet and/or the second water inlet carries out the control.
Water temperature exists after the present embodiment adjusts the flow proportional of hot water or cold water, and then control mixing using three-way control valve 14
Setting value, mixed water temperature is measured by thermal resistance and as the input signal of DCS control systems, compared with setting value
Compared with output performs signal to adjust the aperture of three-way control valve 14.The control loop 19 of the temperature measurement and control instrument 15 is by thermoelectricity
The test result of resistance 15 feeds back to DCS controllers, and by after PID arithmetic analysis, output signal is sent to triple valve 14 and carries out
Adjustment, by the change of valve opening, realizes the change of mixed water temperature, reaches the purpose of real-time control.Preserve three in real time simultaneously
Water temperature value size after logical control valve opening size and mixing, preserves interval time adjustable.
According to different test temperature requirements, suitable temperature value is chosen, different temperature control pilot passageway are set, and
By each pilot passageway reasonable combination together, test system is formed, and is connected by flange, simplify unlike material experiment
The replacing and maintenance of tubing.
It is described cold as the delivery port that a kind of embodiment, the cold water header 12 pass through the external cold water tank of low-temperature receiver water pump 11
The delivery port of water pot is provided with the 3rd stop valve 10.
It is of the invention to be provided with the embodiment of multiple three-way control valves 14, different three-way control valves 14 can be set not
Same default water temperature, so as to realize the Study on Corrosion Characteristics under various water temperatures to same heat exchanger tube to be measured 16.And treated to described
Surveying heat exchanger tube 16 can also be welded using several tubing, realize the corrosion under same wall temperature, same flue gas environment
Property comparison analysis experiment.Accompanying drawing 2 is the actual motion result of the test of pilot system 24h at the scene, and ordinate is threeway everywhere
The delivery port water temperature of regulating valve 14.It is not difficult to find out, this test system has good wall temperature controllability, operation result is demonstrated
The reliability of the system.
Based on above-mentioned pilot system, a kind of test method of Mobile low-temperature corrosion resistance characteristic is comprised the following steps：
1., according to the requirement of test temperature, different temperature control pilot passageway can be set, and each pilot passageway is closed
Reason is combined, and forms test system；
2. the corrosion resistance characteristic of different metal material can be simultaneously tested, a straight heat exchange is spliced into by the form welded
Pipe, two ends are connected with flange, and spliced tubing total length is consistent with the length in reserve of test frame, while ensuring it
Inside and outside footpath size is basically identical with circulation duct, prevents obvious flow regime change, causes test error；
3. inflow temperature and pressure are adjusted using buffer tank, for the hot water for being slightly above 100 DEG C, can directly be led to
Cross the function that buffer tank realizes step-down cooling, it is ensured that the stable operation of experimental rig；For the hot water far above 100 DEG C, can
By blending part warm water or cold water, to reduce excessive flash-off steam loss, energy saving resource and water resource；
4. water temperature is in setting value, mixing after setting the flow proportional that three-way control valve adjusts hot water or cold water, and then control mixing
Water temperature afterwards is measured by thermal resistance and as the input signal of DCS control systems, is compared with set water temperature, and output is held
Row signal adjusts the aperture of three-way control valve.
Presently preferred embodiments of the present invention is the foregoing is only, those skilled in the art know, do not departing from essence of the invention
In the case of god and scope, various changes or equivalent can be carried out to these features and embodiment.In addition, of the invention
Under teaching, these features and embodiment can be modified to adapt to particular situation and material without departing from of the invention
Spirit and scope.Therefore, the present invention is not limited to the particular embodiment disclosed, and the right for falling with the application will
Embodiment in the range of asking belongs to protection scope of the present invention.
Claims (10)
1. a kind of pipeline corrosion resistance characteristic pilot system, for testing corrosion-resistant spy of the tubing in waste heat boiler back-end ductwork
Property, it is characterised in that including：Cold water header, hot water header, three-way control valve, temperature measurement and control instrument, heat exchanger tube to be measured；
The cooling water outlet of the cold water header is connected to the first water inlet of three-way control valve, the hot water outlet of the hot water header
The second water inlet of the three-way control valve is connected to, the delivery port of the three-way control valve is connected to the heat exchanger tube to be measured,
The temperature measurement and control instrument is installed on the delivery port of the three-way control valve, and the heat exchanger tube to be measured is arranged at waste heat boiler afterbody
In flue；
The temperature measurement and control instrument is used for the delivery port water temperature control described first of the three-way control valve obtained according to detection
The valve opening of water inlet and/or the second water inlet, the delivery port water temperature for making the three-way control valve is preset temperature；
Realized with the flue gas in waste heat boiler back-end ductwork by the heat exchanger tube to be measured into the current in the heat exchanger tube to be measured
Heat exchange, the heat exchanger tube to be measured is by the flue gas corrosion.
2. a kind of pipeline corrosion resistance characteristic pilot system according to claim 1, it is characterised in that the heat exchanger tube to be measured
For the straight pipeline that at least one metal pipe material head and the tail are welded successively.
3. a kind of pipeline corrosion resistance characteristic pilot system according to claim 1 and 2, it is characterised in that also including water outlet
Header and water recovery tank, the delivery port of the heat exchanger tube to be measured are connected to the water inlet of the water outlet header, the water outlet header
Delivery port be connected to the water recovery tank.
4. a kind of pipeline corrosion resistance characteristic pilot system according to claim 1, it is characterised in that the three-way control valve
It it is 4, the temperature measurement and control instrument is 4, the heat exchanger tube to be measured is 4；
The delivery port of each three-way control valve is connected respectively to 1 heat exchanger tube to be measured, and each described threeway is adjusted
The delivery port for saving valve is provided with a temperature measurement and control instrument；
The default water temperature of the delivery port of 4 three-way control valves is different.
5. a kind of pipeline corrosion resistance characteristic pilot system according to claim 1, it is characterised in that also including buffered water
Case, the entrance of the buffer tank includes the first hot water inlet and the second hot water inlet, the external boiler of the first hot water inlet
Oxygen-eliminating device outlet pipe, the external preheater outlet pipe of the second hot water inlet, the delivery port of the buffer tank is connected to described
The water inlet of hot water header；
Water in the boiler feed outlet pipe and/or preheater outlet pipe passes through after flowing into the buffer tank mixing buffering
The delivery port of the buffer tank is flowed into the hot water header.
6. a kind of pipeline corrosion resistance characteristic pilot system according to claim 5, it is characterised in that first hot water enters
Mouth is provided with the first stop valve；Second hot water inlet is provided with ball-cock assembly, and the float of the ball-cock assembly floats on the buffer tank
On the water surface.
7. a kind of pipeline corrosion resistance characteristic pilot system according to claim 5, it is characterised in that in the buffer tank
Bimetallic thermometer is provided with, the bimetallic thermometer is used to detect the water temperature of the buffer tank；
The buffer tank top is additionally provided with blast pipe and overfall.
8. a kind of pipeline corrosion resistance characteristic pilot system according to claim 5, it is characterised in that the buffer tank
Delivery port is connected by a thermal source water pump with the hot water header, and the thermal source water pump is used to take out in the water in the buffer tank
Into the hot water header；
The delivery port of the buffer tank is additionally provided with the second stop valve.
9. a kind of pipeline corrosion resistance characteristic pilot system according to claim 1, it is characterised in that the measurement and control of temperature dress
Put including thermal resistance and DCS control systems；The thermal resistance is in the current of the delivery port of the three-way control valve；
The Monitoring Data of the delivery port water temperature of the three-way control valve is transmitted to the DCS control system in real time by the thermal resistance
System, the DCS control systems compare the delivery port water temperature of the three-way control valve with the preset temperature to enter to described first afterwards
The valve opening of the mouth of a river and/or the second water inlet carries out the control.
10. a kind of pipeline corrosion resistance characteristic pilot system according to claim 1, it is characterised in that the cold water header
By the delivery port of the external cold water tank of low-temperature receiver water pump, the delivery port of the cold water tank is provided with the 3rd stop valve.
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| CN109696395A (en) * | 2019-01-25 | 2019-04-30 | 中广核研究院有限公司 | Flowing water corrosion water chemistry experimental system |
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| CN109668722B (en) * | 2019-02-27 | 2023-10-13 | 中辽检测(辽宁)有限公司 | Building shock insulation flexible pipe testing machine |
| CN110618087A (en) * | 2019-10-24 | 2019-12-27 | 丽水市特种设备检测院 | Corrosion resistance detection device for central heating pipeline |
| CN113484228A (en) * | 2021-07-01 | 2021-10-08 | 东北电力大学 | Multi-material ash deposition corrosion state online monitoring system and method in flue gas environment |
| CN113984639B (en) * | 2021-10-29 | 2024-03-26 | 中船黄埔文冲船舶有限公司 | Pipe flow type corrosion test device |
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