CN111879692A - Micromolecular organic acid corrosion simulation device and use method thereof - Google Patents
Micromolecular organic acid corrosion simulation device and use method thereof Download PDFInfo
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Abstract
The invention discloses a micromolecule organic acid corrosion simulation device and a using method thereof, wherein the device comprises a filling unit, a mixed heating unit, a vacuumizing unit, a waste gas treatment unit and a control unit, wherein the filling unit is connected with the mixed heating unit and is used for filling micromolecule organic acid, water and nitrogen into the mixed heating unit according to a rated proportion; the mixed heating unit is used for providing an experiment environment with a proper temperature for the experiment medium; the vacuumizing unit is connected with the mixed heating unit and is used for vacuumizing a device pipeline and a reaction kettle cavity after the experiment is finished and discharging residual mixed gas from the system; the waste gas treatment unit is connected with the mixed heating unit and is used for treating waste gas generated by the simulation device; the control unit is used for controlling the filling unit, the mixing and heating unit and the vacuumizing unit to perform corresponding actions.
Description
Technical Field
The invention relates to the technical field of devices for testing corrosion resistance of materials, in particular to a small molecular organic acid corrosion simulation device and a using method thereof.
Background
Most stainless steel products require good corrosion resistance, such as first-class and second-class tableware, kitchenware, water heaters, water dispensers and the like, and the corrosion resistance of the stainless steel products needs to be tested after the manufacture of the related stainless steel products is finished. The existing method has low automation degree, so that the detection precision is low.
Disclosure of Invention
The invention aims to solve the technical problem of how to provide a micromolecule organic acid corrosion simulator which can automatically finish corrosion resistance tests on carbon steel, CrMo steel and austenitic stainless steel and has high measurement precision.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a micromolecule organic acid corrodes analogue means which characterized in that: the device comprises a filling unit, a mixed heating unit, a vacuumizing unit, a waste gas treatment unit and a control unit, wherein the filling unit is connected with the mixed heating unit and is used for filling micromolecular organic acid, water and nitrogen into the mixed heating unit according to a rated proportion; the mixed heating unit is used for providing an experiment environment with a proper temperature for the experiment medium; the vacuumizing unit is connected with the mixed heating unit and is used for vacuumizing a device pipeline and a reaction kettle cavity after the experiment is finished and discharging residual mixed gas from the system; the waste gas treatment unit is connected with the mixed heating unit and is used for treating waste gas generated by the simulation device; the control unit is used for controlling the filling unit, the mixing and heating unit and the vacuumizing unit to perform corresponding actions.
The further technical scheme is as follows: the filling unit comprises a first precision liquid titrator, a second precision liquid titrator and a pneumatic ball valve, wherein a gas output end of a high-pressure gas cylinder group is connected with a first connecting end of a pneumatic ball valve AOV01 through a pressure reducing valve PR02, compressed air is connected with one connecting end of a filtering and pressure reducing valve FR01 through a pipeline, the other connecting end of the filtering and pressure reducing valve FR01 is connected with a second connecting end of a pneumatic ball valve AOV01 through an electromagnetic valve SV01, a third connecting end of the pneumatic ball valve AOV01 is divided into two paths, the first path is connected with one connecting end of a stop valve SOV01, the other connecting end of the stop valve SOV01 is the first connecting end of the filling unit, the second path is connected with one connecting end of a stop valve SOV03, the other connecting end of the stop valve SOV03 is the second connecting end of the filling unit, the first precision liquid titrator is used for adding a certain amount of formic acid into the, the second precision liquid titrator is used to add a quantity of water to the mixing and heating unit.
The further technical scheme is as follows: the mixed heating unit comprises a first buffer tank, a second buffer tank, a pressure reducing valve PR01 and a reaction kettle, a first connecting end of the filling unit is connected with an input end of the first buffer tank, an output end of the first buffer tank is connected with one end of the pressure reducing valve PR01 through a stop valve SOV02, a second connecting end of the filling unit is connected with an input end of the second buffer tank, an output end of the second buffer tank is connected with a pipeline between the pressure reducing valve PR01 and the stop valve SOV02 through the stop valve SOV04, a formic acid adding pipe and a water adding pipe are respectively arranged between the first buffer tank and the second buffer tank, the first precision liquid titrator is communicated with the formic acid adding pipe, the second precision liquid titrator is communicated with the water adding pipe, and the other end of the pressure reducing valve PR01 is connected with the input end of the reaction kettle.
The further technical scheme is as follows: heating devices are arranged in the first buffer tank, the second buffer tank and the reaction kettle and are used for heating the first buffer tank, the second buffer tank and the reaction kettle.
The further technical scheme is as follows: the first buffer tank is provided with a pressure transmitter PT01 and a temperature transmitter TT01 which are communicated with the first buffer tank; the second buffer tank is provided with a pressure transmitter PT03 and a temperature transmitter TT03 which are communicated with the second buffer tank; and the reaction kettle is provided with a pressure transmitter PT02 and a temperature transmitter TT02 which are communicated with the reaction kettle.
The further technical scheme is as follows: the first buffer tank is provided with a stop valve SOV05 communicated with the first buffer tank; and a stop valve SOV06 communicated with the second buffer tank is arranged on the second buffer tank, and the stop valve SOV05 and the stop valve SOV06 are connected with the waste gas treatment unit through pipelines.
The further technical scheme is as follows: the vacuumizing unit comprises a vacuum pump VP01, the pumping end of the vacuum pump VP01 is connected with one end of a corrugated pipe through a pipeline, the other end of the corrugated pipe is connected with a pipeline between the reaction kettle and a pressure reducing valve PR01 through a quick connector, and a vacuum gauge DDS01 is arranged on the pipeline between the vacuum pump VP01 and the corrugated pipe.
The further technical scheme is as follows: the waste gas treatment unit comprises an alkaline solution placing device, alkaline solution is arranged in the alkaline solution placing device, one end of an exhaust gas pipe is inserted into the alkaline solution, and the other end of the exhaust gas pipe is connected with the exhaust end of the reaction kettle after passing through a cooler and a throttle valve TV 01.
The further technical scheme is as follows: one of the first buffer tank and the second buffer tank is a standby buffer tank.
The embodiment of the invention also discloses a using method of the small molecular organic acid corrosion simulation device, which is characterized by comprising the following steps:
1) and (4) checking: checking whether all valves in the device are in a closed state, and driving whether an air source, a medium air source and a workpiece are all in place;
2) connecting: the compressed air is connected with the interface of the filtering and pressure regulating valve, the gas source gas is connected with the input interface of the device, the output interface is introduced into the alkaline solution, and finally, the connection of each interface and the corresponding equipment is confirmed to be correct;
3) setting: the pressure of the driving air is 0.6-0.8MPa by adjusting the filtering and pressure regulating valve and observing the indicating number of the instrument, and the driving air is used as a driving air source of the pneumatic valve;
after formic acid and water are added into a first buffer tank and a second buffer tank through a precision liquid titrator after calculation, the first buffer tank, the second buffer tank and a reaction kettle are started to preheat, a pneumatic ball valve AOV01, a stop valve SOV01 and a stop valve SOV03 are started after the formic acid and the water are heated to a set temperature, the first buffer tank and the second buffer tank start to be punched, the pneumatic valve AOV01 is closed when the formic acid and the water are punched to 8MPa, the stop valve SOV02 is manually opened, and gas enters the reaction kettle to be tested;
4) after the test is finished, closing the gas cylinder valve on the high-pressure gas cylinder group, purging the system for 1min by using nitrogen, and then closing all valves in the system;
5) vacuumizing: when the device is not used for a long time, the device needs to be vacuumized for the first time, the vacuum pump is provided with an opening button and a stopping button, the opening button is clicked, the vacuum pump is started, the device starts vacuumizing operation, and after the vacuum degree in the device reaches 1.2KPa, the stopping button is clicked to stop vacuumizing, so that the whole vacuumizing operation is completed.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the device can select a pressure reducing valve according to different requirements of a user on testing the pressure, the gas component content and the temperature of a workpiece, and adjust the gas inlet pressure to a range from the normal pressure of the test pressure to 8 MPa; the method comprises the steps of introducing three media of micromolecular organic acid (formic acid), water and nitrogen into a laboratory reaction kettle together according to a set proportion by a weighing method and a pressure conversion algorithm, automatically controlling the temperature in the reaction kettle by a PID temperature controller, and realizing remote control. In conclusion, the device can automatically complete corrosion resistance tests on three materials of carbon steel, CrMo steel and austenitic stainless steel, and has high measurement precision.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic diagram of an apparatus according to an embodiment of the present invention;
wherein: 1. a first precision liquid titrator; 2. a second precision liquid titrator; 3. a high pressure gas cylinder group; 4. a first buffer tank; 5. a second buffer tank; 6. a reaction kettle; 7. a formic acid addition tube; 8. a water addition tube; 9. a bellows; 10. a quick coupling; 11. an alkaline solution placing device; 12. an exhaust pipe.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1, the embodiment of the invention discloses a small molecule organic acid corrosion simulation device, which comprises a filling unit, a mixed heating unit, a vacuumizing unit, a waste gas treatment unit and a control unit, wherein the filling unit is connected with the mixed heating unit and is used for filling small molecule organic acid, water and nitrogen into the mixed heating unit according to a rated proportion; the mixed heating unit is used for providing an experiment environment with a proper temperature for the experiment medium; the vacuumizing unit is connected with the mixed heating unit and is used for vacuumizing a device pipeline and a reaction kettle cavity after the experiment is finished and discharging residual mixed gas from the system; the waste gas treatment unit is connected with the mixed heating unit and is used for treating waste gas generated by the simulation device; the control unit is used for controlling the filling unit, the mixing and heating unit and the vacuumizing unit to perform corresponding actions.
Further, as shown in fig. 1, the filling unit comprises a first precision liquid titrator 1, a second precision liquid titrator 2 and a pneumatic ball valve AOV 01. The gas output end of the high-pressure gas cylinder group 3 is connected with the first connecting end of a pneumatic ball valve AOV01 through a pressure reducing valve PR02, the compressed air is connected with one connecting end of a filtering pressure reducing valve FR01 through a pipeline, the other connecting end of the filtering pressure reducing valve FR01 is connected with the second connecting end of the pneumatic ball valve AOV01 through a solenoid valve SV01, the third connecting end of the pneumatic ball valve AOV01 is divided into two paths, the first path is connected with one connecting end of a stop valve SOV01, the other connection of the cut-off valve SOV01 is a first output connection of the filling unit, the second way is connected with one connection of the cut-off valve SOV03, the other connection of the shut-off valve SOV03 is the second outlet connection of the filling unit, the first precision liquid titrator 1 is used for adding a certain amount of formic acid into a mixing and heating unit, the second precision liquid titrator 2 is used to add a quantity of water to the mixing and heating unit.
Formic acid and water are liquid at normal temperature and normal pressure, and are manually placed into a reaction kettle (a first buffer tank and a second buffer tank) according to a set volume by using a precision liquid titrator. After formic acid and water are filled into the mixing cavity according to the fixed components, a nitrogen source is 15MPa gas cylinder gas, and the pressure is regulated to 8MPa through a pressure reducing valve and then the gas is introduced into the mixing cavity. The air inlet pipeline is provided with a one-way valve and a pneumatic ball valve, and the pneumatic ball valve is matched with the electromagnetic valve for use, so that the automatic opening and closing function can be realized.
Further, as shown in fig. 1, the mixing and heating unit includes a first buffer tank 4, a second buffer tank 5, a pressure reducing valve PR01, and a reaction tank 6. The first output connection end of the filling unit is connected with the input end of the first buffer tank 4, the output end of the first buffer tank 4 is connected with one end of a pressure reducing valve PR01 through a stop valve SOV02, the second output connection end of the filling unit is connected with the input end of the second buffer tank 5, the output end of the second buffer tank 5 is connected with a pipeline between the pressure reducing valve PR01 and the stop valve SOV02 through a stop valve SOV04, a formic acid adding pipe 7 and a water adding pipe 8 are respectively arranged between the first buffer tank 4 and the second buffer tank 5, the first precision liquid titrator 1 is communicated with the formic acid adding pipe 7, the second precision liquid titrator 2 is communicated with the water adding pipe 8, and the other end of the pressure reducing valve PR01 is connected with the input end of the reaction kettle. Wherein first buffer tank 4, second buffer tank 5 are 5L, and 8MPa reation kettle 2, reation kettle 6 are 5L,4MPa reation kettle, and when the experiment began, formic acid and water were filled into mixing distribution reation kettle with the digital titrator.
Water vapor filling amount: user input a (ppm), actual required output quality: 6.78 × 10-5 (ml); sulfur trioxide dosing amount: user input b (ppm), actual required output quality: 2.4 × 10-5 (ml); after formic acid and water are added into a 5L high-pressure reaction kettle under 8MPa by a digital titrator after calculation, a high-pressure reaction kettle 1, a high-pressure reaction kettle 2 and a high-pressure reaction kettle 3 are started for preheating. After heating to the set temperature, the pneumatic ball valve AOV01, the stop valves SOV01 and SOV03 are opened, the first buffer tank and the second buffer tank start to be stamped to 8Mpa, and the pneumatic valve AOV01 is closed. The stop valve SOV02 was opened manually and the gas was admitted to reactor 3 for testing.
Further, as shown in fig. 1, heating devices are disposed in the first buffer tank 4, the second buffer tank 5, and the reaction kettle 6, and are used for heating the first buffer tank 4, the second buffer tank 5, and the reaction kettle 6. The first buffer tank 4 is provided with a pressure transmitter PT01 and a temperature transmitter TT01 which are communicated with the first buffer tank 4; the second buffer tank 5 is provided with a pressure transmitter PT03 and a temperature transmitter TT03 which are communicated with the second buffer tank; be provided with pressure transmitter PT02 and temperature transmitter TT02 rather than being linked together on reation kettle 6, through pressure transmitter can be convenient control buffer tank and reation kettle's pressure, through temperature transmitter can be convenient control buffer tank and reation kettle's temperature. The first buffer tank 4 is provided with a stop valve SOV05 communicated with the first buffer tank; be provided with stop valve SOV06 rather than the intercommunication on the second buffer tank 5, stop valve SOV05 and stop valve SOV06 pass through the pipeline with the exhaust-gas treatment unit is connected, through stop valve SOV05 and stop valve SOV06 can be convenient with remaining water and formic acid etc. in first buffer tank and the second buffer tank arrange the exhaust-gas treatment unit in and handle.
Further, as shown in fig. 1, the vacuum pumping unit includes a vacuum pump VP01, an air pumping end of the vacuum pump VP01 is connected to one end of a bellows 9 through a pipeline, the other end of the bellows 9 is connected to a pipeline between the reaction kettle 8 and a pressure reducing valve PR01 through a quick coupling 10, and a vacuum gauge DDS01 is disposed on the pipeline between the vacuum pump VP01 and the bellows 9. The vacuumizing unit has the main functions of vacuumizing the system pipeline and the reaction kettle cavity after the experiment is finished, discharging residual mixed gas from the system and avoiding influencing the next experimental data. The vacuum pump is DOP-40D type vacuum pump with vacuum pumping capacity of 1.2KPa and speed of 40L/min.
Further, as shown in fig. 1, the waste gas treatment unit includes an alkaline solution containing device 11, an alkaline solution is provided in the alkaline solution containing device 11, one end of the waste gas pipe 1 is inserted into the alkaline solution, the other end of the waste gas pipe 12 is connected with the exhaust end of the reaction kettle 8 after passing through a cooler CL01 and a throttle valve TV01, and the waste gas generated after the device experiment is treated by the waste gas treatment unit to prevent air pollution or harm to human body. In the process of using the first buffer tank 4 and the second buffer tank 5, one of the buffer tanks can be used as a standby buffer tank, so that the device can not be used.
The automatic control part is integrally integrated in the electric cabinet, and the communication of the reaction kettle in the system is MODBUS + RS485 and can be controlled in a centralized manner through programs. The lower system position adopts a PLC controller as a control core, the upper system position adopts a display as a man-machine friendly interaction carrier, the PLC controller and the upper system position are organically combined to realize the functions of remote control, data processing, recording, exporting and the like, and the functions of generating a pressure curve, generating a test report and the like. Labview software is adopted in upper software programming of my department, independent development of a pressure control system is converted, the interface is friendly, safety and reliability are achieved, operation is convenient, data in the testing process can be stored in real time, a pressure-time curve can be drawn in real time, and various testing parameters are exported through file formats such as EXCEL, text and XML.
The embodiment of the invention also discloses a using method of the micromolecule organic acid corrosion simulator, which comprises the following steps:
1) and (4) checking: checking whether all valves in the device are in a closed state, and driving whether an air source, a medium air source and a workpiece are all in place;
2) connecting: the compressed air is connected with the interface of the filtering and pressure regulating valve, the gas source gas is connected with the input interface of the device, the output interface is introduced into the alkaline solution, and finally, the connection of each interface and the corresponding equipment is confirmed to be correct;
3) setting: the pressure of the driving air is 0.6-0.8MPa by adjusting the filtering and pressure regulating valve and observing the indicating number of the instrument, and the driving air is used as a driving air source of the pneumatic valve;
after formic acid and water are added into a first buffer tank 4 and a second buffer tank 5 through a precision liquid titrator after calculation, the first buffer tank 4, the second buffer tank 5 and a reaction kettle 6 are started to be preheated, after the formic acid and the water are heated to a set temperature, a pneumatic ball valve AOV01, a stop valve SOV01 and a stop valve SOV03 are started, the first buffer tank 4 and the second buffer tank 5 begin to be punched, the pneumatic valve AOV01 is closed when the formic acid and the water are punched to 8MPa, the stop valve SOV02 is manually opened, and gas enters the reaction kettle to be tested;
4) after the test is finished, closing the gas cylinder valve on the high-pressure gas cylinder group, purging the system for 1min by using nitrogen, and then closing all valves in the system;
5) vacuumizing: when the device is not used for a long time, the device needs to be vacuumized for the first time, the vacuum pump VP01 is provided with an opening button and a stopping button, the opening button is clicked, the vacuum pump is started, the device starts vacuumizing operation, and after the vacuum degree in the device reaches 1.2KPa, the stopping button is clicked to stop vacuumizing, so that the whole vacuumizing operation is completed.
Attention points before starting up:
1) checking external necessary conditions such as air source and power supply to ensure correct supply;
2) and confirming that all manual valves of the system are in a closed state.
Description of the setup:
the first step is as follows: flow setting
Water vapor filling amount: user input a (ppm), actual required output quality: 6.78 × 10-5 (ml);
sulfur trioxide dosing amount: user input b (ppm), actual required output quality: 2.4 × 10-5 (ml);
filling amount of nitrogen gas: and (3) pressurizing the pressure in the reaction kettle 1 and the reaction kettle 2 to 8MPa, and finishing the nitrogen filling amount.
The second step is that: temperature setting
The temperature of the first buffer tank and the second buffer tank is set to be 250 ℃; the set temperature of the reaction kettle was 250 ℃.
Shutdown precautions: when the system is closed every time, the gas cylinder valve is closed, after vacuum pumping is carried out, the pneumatic valve and the manual valve in the system are closed, mixed gas is prevented from being in the system, and danger caused by misoperation of personnel is avoided; all maintenance operations require the compressed air supply line to be shut off and the relief valve to be opened.
Safety precautions
1) Before starting up, checking necessary conditions such as an external air source, an output port alkaline solution and the like, and ensuring correct supply and firm connection;
2) when the equipment is operated every time, the conditions of input pressure, driving air pressure, output pressure and the like need to be checked through a digital display instrument, so that equipment damage or other safety problems caused by overpressure are avoided.
3) And during pressure test and test operation, operation or access of irrelevant personnel is forbidden.
4) The equipment is used according to strict specifications, and if the operation is improper, great danger is brought to operators.
5) In the preheating and testing processes of the reaction kettle, the high temperature of the equipment is noticed, and the scald is prevented.
6) The operation must be prevented from falling off, otherwise the parts are easily damaged or lost.
7) When the system is closed every time, please close the speed regulating valve to completely cut off the pipeline of the driving part; the output stop valve is closed to cut off the high-pressure output; the relief valve is opened to relieve the system pressure, thereby avoiding danger caused by misoperation of personnel.
8) And absolutely forbidding test operation when the system is not completely assembled.
9) During fault analysis and diagnosis, if short-distance operation is required, the fault analysis and diagnosis can be only carried out after pressure relief.
10) All maintenance operations need to be carried out after the driving air supply pipeline and the medium pipeline are cut off and the relief valve is opened, and the maintenance and the repair are absolutely forbidden under the condition that the system has pressure.
Claims (10)
1. A micromolecule organic acid corrodes analogue means which characterized in that: the device comprises a filling unit, a mixed heating unit, a vacuumizing unit, a waste gas treatment unit and a control unit, wherein the filling unit is connected with the mixed heating unit and is used for filling micromolecular organic acid, water and nitrogen into the mixed heating unit according to a rated proportion; the mixed heating unit is used for providing an experiment environment with a proper temperature for the experiment medium; the vacuumizing unit is connected with the mixed heating unit and is used for vacuumizing a device pipeline and a reaction kettle cavity after the experiment is finished and discharging residual mixed gas from the system; the waste gas treatment unit is connected with the mixed heating unit and is used for treating waste gas generated by the simulation device; the control unit is used for controlling the filling unit, the mixing and heating unit and the vacuumizing unit to perform corresponding actions.
2. The small molecule organic acid corrosion simulator of claim 1, wherein: the filling unit comprises a first precision liquid titrator (1), a second precision liquid titrator (2) and a pneumatic ball valve AOV01, wherein a gas output end of a high-pressure gas bottle group (3) is connected with a first connecting end of the pneumatic ball valve AOV01 through a pressure reducing valve PR02, compressed air is connected with one connecting end of a filtering pressure reducing valve FR01 through a pipeline, the other connecting end of the filtering pressure reducing valve FR01 is connected with a second connecting end of the pneumatic ball valve AOV01 through an electromagnetic valve SV01, a third connecting end of the pneumatic ball valve AOV01 is divided into two paths, the first path is connected with one connecting end of a stop valve SOV01, the other connecting end of the stop valve SOV01 is a first output connecting end of the filling unit, the second path is connected with one connecting end of a stop valve SOV03, the other connecting end of the stop valve SOV03 is a second output connecting end of the filling unit, the first precision liquid titrator (1) is used for adding a certain amount of formic acid into the mixing heating, the second precision liquid titrator (2) is used for adding a certain amount of water into the mixing and heating unit.
3. The small molecule organic acid corrosion simulator of claim 2, wherein: the mixed heating unit comprises a first buffer tank (4), a second buffer tank (5), a pressure reducing valve PR01 and a reaction kettle (6), wherein a first output connecting end of the filling unit is connected with an input end of the first buffer tank (4), an output end of the first buffer tank (4) is connected with one end of the pressure reducing valve PR01 through a stop valve SOV02, a second output connecting end of the filling unit is connected with an input end of the second buffer tank (5), an output end of the second buffer tank (5) is connected with a pipeline between the pressure reducing valve PR01 and the stop valve SOV02 through a stop valve SOV04, a formic acid adding pipe (7) and a water adding pipe (8) are respectively arranged between the first buffer tank (4) and the second buffer tank (5), a first precision liquid titrator (1) is communicated with the formic acid adding pipe (7), and a second precision liquid titrator (2) is communicated with the water adding pipe (8), the other end of the pressure reducing valve PR01 is connected with the input end of the reaction kettle.
4. The small molecule organic acid corrosion simulator of claim 3, wherein: heating devices are arranged in the first buffer tank (4), the second buffer tank (5) and the reaction kettle (6) and used for heating the first buffer tank (4), the second buffer tank (5) and the reaction kettle (6).
5. The small molecule organic acid corrosion simulator of claim 3, wherein: the first buffer tank (4) is provided with a pressure transmitter PT01 and a temperature transmitter TT01 which are communicated with the first buffer tank; the second buffer tank (5) is provided with a pressure transmitter PT03 and a temperature transmitter TT03 which are communicated with the second buffer tank; and the reaction kettle (6) is provided with a pressure transmitter PT02 and a temperature transmitter TT02 which are communicated with the reaction kettle.
6. The small molecule organic acid corrosion simulator of claim 3, wherein: a stop valve SOV05 communicated with the first buffer tank (4) is arranged on the first buffer tank; and a stop valve SOV06 communicated with the second buffer tank (5) is arranged on the second buffer tank, and the stop valve SOV05 and the stop valve SOV06 are connected with the waste gas treatment unit through pipelines.
7. The small molecule organic acid corrosion simulator of claim 3, wherein: the vacuum pumping unit comprises a vacuum pump VP01, the pumping end of the vacuum pump VP01 is connected with one end of a corrugated pipe (9) through a pipeline, the other end of the corrugated pipe (9) is connected with a pipeline between the reaction kettle (8) and a pressure reducing valve PR01 through a quick joint (10), and a vacuum meter DDS01 is arranged on the pipeline between the vacuum pump VP01 and the corrugated pipe (9).
8. The small molecule organic acid corrosion simulator of claim 3, wherein: the waste gas treatment unit comprises an alkaline solution placing device (11), wherein an alkaline solution is arranged in the alkaline solution placing device (11), one end of an exhaust gas pipe (12) is inserted into the alkaline solution, and the other end of the exhaust gas pipe (12) is connected with the exhaust end of the reaction kettle (8) after passing through a cooler CL01 and a throttle valve TV 01.
9. The small molecule organic acid corrosion simulator of claim 3, wherein: one of the first buffer tank (4) and the second buffer tank (5) is a standby buffer tank.
10. A method for using the small-molecule organic acid corrosion simulator according to any one of claims 1 to 9, comprising the steps of:
1) and (4) checking: checking whether all valves in the device are in a closed state, and driving whether an air source, a medium air source and a workpiece are all in place;
2) connecting: the compressed air is connected with the interface of the filtering and pressure regulating valve, the gas source gas is connected with the input interface of the device, the output interface is introduced into the alkaline solution, and finally, the connection of each interface and the corresponding equipment is confirmed to be correct;
3) setting: the pressure of the driving air is 0.6-0.8MPa by adjusting the filtering and pressure regulating valve and observing the indicating number of the instrument, and the driving air is used as a driving air source of the pneumatic valve;
after formic acid and water are added into a first buffer tank (4) and a second buffer tank (5) through a precision liquid titrator after calculation, the first buffer tank (4), the second buffer tank (5) and a reaction kettle (6) are started to preheat, after the formic acid and the water are heated to a set temperature, a pneumatic ball valve AOV01, a stop valve SOV01 and a stop valve SOV03 are started, punching is started in the first buffer tank (4) and the second buffer tank (5), the pneumatic valve AOV01 is closed when the formic acid and the water are punched to 8MPa, the stop valve SOV02 is manually opened, and gas enters the reaction kettle to be tested;
4) after the test is finished, closing the gas cylinder valve on the high-pressure gas cylinder group, purging the system for 1min by using nitrogen, and then closing all valves in the system;
5) vacuumizing: when the device is not used for a long time, the device needs to be vacuumized for the first time, the vacuum pump VP01 is provided with an opening button and a stopping button, the opening button is clicked, the vacuum pump is started, the device starts vacuumizing operation, and after the vacuum degree in the device reaches 1.2KPa, the stopping button is clicked to stop vacuumizing, so that the whole vacuumizing operation is completed.
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| US20140005995A1 (en) * | 2012-06-29 | 2014-01-02 | Chevron U.S.A. Inc. | Processes and systems for predicting corrosion |
| CN104614307A (en) * | 2015-02-26 | 2015-05-13 | 中国特种设备检测研究院 | Experimental device for simulating hydrochloric acid dew point corrosion |
| CN206146768U (en) * | 2016-10-26 | 2017-05-03 | 天津科技大学 | Three phase flow erosion corrosion test device |
| CN209727723U (en) * | 2018-10-11 | 2019-12-03 | 海德利森(天津)检测设备有限公司 | Metal erosion experimental provision in the case of a kind of sulfuric acid leak source |
| CN111443182A (en) * | 2020-05-09 | 2020-07-24 | 中国华能集团有限公司 | Supergravity hydrate research experiment system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140005995A1 (en) * | 2012-06-29 | 2014-01-02 | Chevron U.S.A. Inc. | Processes and systems for predicting corrosion |
| CN104614307A (en) * | 2015-02-26 | 2015-05-13 | 中国特种设备检测研究院 | Experimental device for simulating hydrochloric acid dew point corrosion |
| CN206146768U (en) * | 2016-10-26 | 2017-05-03 | 天津科技大学 | Three phase flow erosion corrosion test device |
| CN209727723U (en) * | 2018-10-11 | 2019-12-03 | 海德利森(天津)检测设备有限公司 | Metal erosion experimental provision in the case of a kind of sulfuric acid leak source |
| CN111443182A (en) * | 2020-05-09 | 2020-07-24 | 中国华能集团有限公司 | Supergravity hydrate research experiment system and method |
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