CN215866598U - Film-forming corrosion inhibitor evaluation device suitable for in-transit nuclear power generating unit - Google Patents
Film-forming corrosion inhibitor evaluation device suitable for in-transit nuclear power generating unit Download PDFInfo
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- CN215866598U CN215866598U CN202122085547.4U CN202122085547U CN215866598U CN 215866598 U CN215866598 U CN 215866598U CN 202122085547 U CN202122085547 U CN 202122085547U CN 215866598 U CN215866598 U CN 215866598U
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Abstract
The utility model provides a film-forming corrosion inhibitor evaluation device suitable for an in-transit nuclear power generating unit, which comprises the following components: the medicine storage box is used for storing the aqueous solution of the film forming corrosion inhibitor for the test; the high-pressure sample pump is used for supplementing a film-forming corrosion inhibitor aqueous solution into the circulating system of the film-forming corrosion inhibitor evaluation device; the circulating pump is used for providing circulating power of the filming corrosion inhibitor evaluation device for simulating the high flow speed of the operation condition; the heater is used for heating the temperature of the circulating system to meet the test requirement; a flow meter for monitoring a test flow rate; the sample clamping device is used for installing and fixing a metal sample; the cooler is used for reducing the temperature of the effluent of the circulating system of the film-forming corrosion inhibitor evaluation device; and the sampler is used for collecting water samples in the circulating system of the evaluation device. The utility model can truly simulate the operation parameters of a nuclear power unit, and evaluate and research the inhibition effect of the film-forming corrosion inhibitor on flow accelerated corrosion under the condition of 90-degree medium impact.
Description
Technical Field
The utility model belongs to the technical field of nuclear power unit corrosion prevention, and particularly relates to a film forming corrosion inhibitor evaluation device suitable for an in-transit nuclear power unit.
Background
The problem of flow accelerated corrosion has plagued the nuclear power industry for many years. In a two-loop reducing water environment of a nuclear power unit, an oxidation film generated on the surface of metal is mainly magnetite, has a loose and unstable structure, is easily dissolved in a single-phase liquid or vapor-liquid two-phase flow medium and is taken away by a flowing medium, so that the metal is continuously corroded and thinned. The occurrence of flow accelerated corrosion can lead to the reduction of the wall thickness of a nuclear power station pipeline system and other flow passage components, and if the reduction phenomenon is not detected in time and corresponding measures are taken, the nuclear power station pipeline system and other flow passage components can be suddenly broken to cause equipment failure after being reduced to a certain degree, and the safe and reliable operation of a nuclear power unit is seriously threatened. Therefore, a solution is needed to solve the problem of flow-accelerated corrosion of the secondary loop thermal equipment and pipes of the nuclear power plant.
The filming corrosion inhibitor is an effective method for machine set maintenance, and utilizes the physical and chemical action of filming matter and metal surface to form a protective film layer to inhibit rust in the course of stopping. However, if this technique is attempted to be applied to corrosion control of nuclear power generating units, it is still necessary to study the effect of the film-forming corrosion inhibitor on flow-accelerated corrosion, the temperature, the flow rate parameters, the influence on water quality, and the like.
Disclosure of Invention
In order to guarantee the safe operation of the nuclear power unit and simulate the performance research of the film-forming corrosion inhibitor under the operation condition, the utility model provides the film-forming corrosion inhibitor evaluation device suitable for the nuclear power unit in operation, and the device can simulate the control performance of parameters such as the temperature, the pressure, the flow rate, the concentration of the film-forming corrosion inhibitor and the like of a secondary loop under the operation condition of the nuclear power unit on the flow accelerated corrosion of a metal pipeline material.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a film-forming corrosion inhibitor evaluation device suitable for a nuclear power generating unit comprises:
a pesticide box 1 for storing aqueous solution of film-forming corrosion inhibitor for test;
the high-pressure sampling pump 2 is used for supplementing aqueous solution of the film-forming corrosion inhibitor into the circulating system of the film-forming corrosion inhibitor evaluation device;
the circulating pump 3 is used for providing circulating power of the filming corrosion inhibitor evaluation device for simulating the operation working condition and high flow rate;
the heater 4 is used for heating the temperature of the circulating system to meet the test requirement;
a flow meter 5 for monitoring the test flow rate;
the sample clamping device 6 is used for installing and fixing a metal sample;
the cooler 7 is used for reducing the temperature of the effluent of the circulating system of the film-forming corrosion inhibitor evaluation device;
the sampler 8 is used for collecting water samples in the circulating system of the evaluation device;
circulating pump 3, flowmeter 5, sample clamping device 6 loop through stainless steel pipeline and connect, constitute filming corrosion inhibitor evaluation device circulation system, high-pressure sampling pump 2 adopts the stainless steel pipeline to be connected with explosive box 1 and circulating pump 3, heater 4 is located the pipeline between circulating pump 3 and the flowmeter 5, cooler 7 is located sample clamping device 6 export, adopts the stainless steel pipeline respectively with explosive box 1 and sample clamping device 6 exit tube coupling, sampler 8 is located circulating pump 3 export.
The sample clamping device 6 comprises a test cavity 9, and an inlet and an outlet of the test cavity 9 are connected with a circulating system pipeline of the evaluation device in a welding mode so as to realize a high-temperature, high-pressure and high-flow-rate medium environment in the cavity; the metal sample 10 is embedded into the sealing sleeve 11 in an interference fit mode, and then the sealing sleeve 11 is placed in the test cavity 9; and a sealing end cover 12 and a bolt 13 are adopted to realize the sealing of the sealing sleeve 11 and the test cavity 9.
The sealing sleeve 11 is made of polytetrafluoroethylene and is designed in a T-shaped structure, the edge of the T-shaped structure serves as a sealing part, and sealing is achieved through extrusion of the testing cavity 9 and the sealing end cover 12 on the sealing part.
The technical scheme provided by the utility model has the following beneficial effects:
the utility model provides a film-forming corrosion inhibitor evaluation device suitable for a nuclear power transport unit, which can simulate parameters such as pipeline flow, medium temperature, pressure and the like of the nuclear power transport unit and detect and control the concentration of a film-forming corrosion inhibitor in real time, so that the control performance of the film-forming corrosion inhibitor on the flow accelerated corrosion of metal pipeline materials is obtained. By the technical scheme provided by the utility model, the operation parameters of a nuclear power unit can be truly simulated, and the inhibition effect of the film-forming corrosion inhibitor on flow accelerated corrosion under the condition of 90-degree medium impact can be researched.
Drawings
FIG. 1 is a schematic diagram of a film-forming corrosion inhibitor evaluation device for an in-transit nuclear power generating unit according to an embodiment of the present invention.
FIG. 2 is a schematic view of a sample holding apparatus.
Detailed Description
The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, the use of directional terms such as "upper, lower, left, right" generally means upper, lower, left, right with reference to the accompanying drawings, unless otherwise specified.
In order to carry out experimental research on the factors, the embodiment provides a device and a method for evaluating a film-forming corrosion inhibitor suitable for a nuclear power generating unit, and referring to fig. 1, the evaluation device comprises: a pesticide box 1 for storing aqueous solution of film-forming corrosion inhibitor for test; the high-pressure sampling pump 2 is used for supplementing aqueous solution of the film-forming corrosion inhibitor into the circulating system of the film-forming corrosion inhibitor evaluation device; the circulating pump 3 is used for providing circulating power of the filming corrosion inhibitor evaluation device for simulating the operation working condition and high flow rate; the heater 4 is used for heating the temperature of the circulating system to meet the test requirement; a flow meter 5 for monitoring the test flow rate; the sample clamping device 6 is used for installing and fixing a metal sample; the cooler 7 is used for reducing the temperature of the effluent of the circulating system of the film-forming corrosion inhibitor evaluation device; and the sampler 8 is used for collecting water samples in the circulating system of the evaluation device. Circulating pump 3, flowmeter 5, sample clamping device 6 loop through stainless steel pipeline and connect, constitute filming corrosion inhibitor evaluation device circulation system, high-pressure sampling pump 2 adopts the stainless steel pipeline to be connected with explosive box 1 and circulating pump 3, heater 4 is located the pipeline between circulating pump 3 and the flowmeter 5, cooler 7 is located sample clamping device 6 export, adopts the stainless steel pipeline respectively with explosive box 1 and sample clamping device 6 exit tube coupling, sampler 8 is located circulating pump 3 export.
As shown in fig. 2, the sample holding device 6 includes a testing cavity 9, and an inlet and an outlet of the testing cavity 9 are connected with a circulating system pipeline of the evaluation device in a welding manner at an angle of 90 ° to realize a medium environment with high temperature, high pressure and high flow rate in the cavity; the metal sample 10 is embedded into a polytetrafluoroethylene sealing sleeve 11 in an interference fit mode, and then the sample sealing sleeve 11 is placed in the test cavity 9; and a sealing end cover 12 and a bolt 13 are adopted to realize the sealing of the sealing sleeve 11 and the test cavity 9.
The sealing sleeve 11 is made of polytetrafluoroethylene, as shown in fig. 2, the sealing sleeve 11 is designed in a T-shaped structure, the T-shaped edge is used as a sealing part, and sealing is achieved through extrusion of the testing cavity 9 and the sealing end cover 12 on the sealing part.
Firstly, adding a film-forming corrosion inhibitor aqueous solution with preset concentration and pH value into a medicine storage box 1, and installing a metal sample into a sample clamping device 6; then, starting a high-pressure sample injection pump 2 to inject a film-forming corrosion inhibitor aqueous solution into a circulating system of the film-forming corrosion inhibitor evaluation device, and starting a circulating pump 3 after the circulating pump is filled with the film-forming corrosion inhibitor aqueous solution; adjusting the temperature, pressure and flow of the circulating system to meet the test requirements, and then starting a film-forming corrosion inhibitor evaluation test; the water solution is obtained by the sampler 8 and detected, and the concentration of the corrosion inhibitor in the system is monitored.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the utility model, many simple modifications can be made to the technical solution of the utility model. Including each of the specific features, are combined in any suitable manner. The utility model is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (3)
1. A film-forming corrosion inhibitor evaluation device suitable for a nuclear power generating unit is characterized by comprising the following components:
the pesticide storage box (1) is used for storing the aqueous solution of the film-forming corrosion inhibitor for the test;
the high-pressure sampling pump (2) is used for supplementing aqueous solution of the film-forming corrosion inhibitor into the circulating system of the film-forming corrosion inhibitor evaluation device;
the circulating pump (3) is used for providing circulating power with high flow rate under the simulated operation condition of the film forming corrosion inhibitor evaluation device;
the heater (4) is used for heating the temperature of the circulating system to meet the test requirement;
a flow meter (5) for monitoring the test flow rate;
the sample clamping device (6) is used for installing and fixing a metal sample;
the cooler (7) is used for reducing the temperature of the effluent of the circulating system of the film-forming corrosion inhibitor evaluation device;
the sampler (8) is used for collecting the water sample in the circulating system of the evaluation device;
circulating pump (3), flowmeter (5), sample clamping device (6) loop through the stainless steel pipeline and connect, constitute filming corrosion inhibitor evaluation device circulation system, high-pressure sampling pump (2) adopt the stainless steel pipeline to be connected with explosive box (1) and circulating pump (3), heater (4) are located the pipeline between circulating pump (3) and flowmeter (5), cooler (7) are located sample clamping device (6) export, adopt the stainless steel pipeline respectively with explosive box (1) and sample clamping device (6) outlet pipe connection, sampler (8) are located circulating pump (3) export.
2. The device for evaluating the filming corrosion inhibitor applicable to the nuclear power generating unit according to claim 1, is characterized in that: the sample clamping device (6) comprises a test cavity (9), and an inlet and an outlet of the test cavity (9) are connected with a circulating system pipeline of the evaluation device in a welding mode at an angle of 90 degrees so as to realize a high-temperature, high-pressure and high-flow-rate medium environment in the cavity; the metal sample (10) is embedded into a sealing sleeve (11) in an interference fit mode, and the sealing sleeve (11) is arranged in the test cavity (9); and a sealing end cover (12) and a bolt (13) are adopted to realize the sealing of the sealing sleeve (11) and the test cavity (9).
3. The device for evaluating the filming corrosion inhibitor applicable to the nuclear power generating unit according to claim 2, is characterized in that: the sealing sleeve (11) is made of polytetrafluoroethylene, a T-shaped structural design is adopted, the T-shaped edge serves as a sealing part, and sealing is achieved through extrusion of the testing cavity (9) and the sealing end cover (12) on the sealing part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122085547.4U CN215866598U (en) | 2021-08-31 | 2021-08-31 | Film-forming corrosion inhibitor evaluation device suitable for in-transit nuclear power generating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122085547.4U CN215866598U (en) | 2021-08-31 | 2021-08-31 | Film-forming corrosion inhibitor evaluation device suitable for in-transit nuclear power generating unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215866598U true CN215866598U (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122085547.4U Active CN215866598U (en) | 2021-08-31 | 2021-08-31 | Film-forming corrosion inhibitor evaluation device suitable for in-transit nuclear power generating unit |
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| CN (1) | CN215866598U (en) |
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2021
- 2021-08-31 CN CN202122085547.4U patent/CN215866598U/en active Active
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