CN113588536A - Device and method for evaluating vapor phase corrosion inhibitor of thermal equipment - Google Patents
Device and method for evaluating vapor phase corrosion inhibitor of thermal equipment Download PDFInfo
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- CN113588536A CN113588536A CN202111011832.XA CN202111011832A CN113588536A CN 113588536 A CN113588536 A CN 113588536A CN 202111011832 A CN202111011832 A CN 202111011832A CN 113588536 A CN113588536 A CN 113588536A
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- corrosion inhibitor
- stop valve
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- phase corrosion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/002—Test chambers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
Abstract
The invention provides a device and a method for evaluating a vapor phase corrosion inhibitor of thermal equipment, wherein the evaluation device comprises the following components: the air compressor is used for providing a gas source of gas phase corrosion inhibitor carrier gas; the gas heater is used for heating the temperature of carrier gas of the vapor phase corrosion inhibitor, and a temperature measuring point is arranged at the outlet of the gas heater so as to control the output power of the gas heater; the corrosion inhibitor gasification device is used for heating and gasifying the vapor phase corrosion inhibitor, a porous ceramic clapboard is horizontally arranged in the corrosion inhibitor gasification device, and vapor phase corrosion inhibitor particles and powder are placed on the porous ceramic clapboard; a filter for filtering non-gasified corrosion inhibitor particles and powder; the inside of the damp-heat test box can be uniformly suspended with corrosion test pieces for evaluating the corrosion resistance of the vapor phase corrosion inhibitor; the invention can simulate and evaluate the corrosion resistance of the metal material of the thermal equipment under different temperatures, relative humidity and corrosion inhibitor concentration, can truly reflect the corrosion resistance effect of the gas phase corrosion inhibitor, has wide application range, and can participate in evaluation under most working conditions; the equipment is simple, the operation is convenient, and the result is visual.
Description
Technical Field
The invention belongs to the technical field of corrosion protection, and particularly relates to a device and a method for evaluating a vapor phase corrosion inhibitor of thermal equipment.
Background
When thermal power generating unit thermal equipment is in a stop-use period, if effective protection measures are not taken, stop-use corrosion of a thermal system is caused, so that the service performance of the equipment is reduced, the heat exchange efficiency of a boiler is reduced, the starting time of the unit is prolonged, the stress corrosion of a turbine blade is caused, and the safety and economic operation of a power plant are seriously influenced. Therefore, effective protection measures should be taken during plant outages to reduce the risk of corrosion during thermal plant outages.
Compared with the traditional shutdown protection technologies such as wet method, dry method and active amine, the gas-phase shutdown protective agent has the advantages of convenient use, cleanness and good effect, and can meet the shutdown protection of thermodynamic equipment with complex structure and huge system. However, the amount of the vapor phase corrosion inhibitor used in the thermal equipment and the protective effect on different metal materials need to be studied and evaluated in a laboratory.
Disclosure of Invention
Based on the problem of evaluating the performance of the vapor phase corrosion inhibitor of the thermal equipment, the invention provides a device and a method for evaluating the vapor phase corrosion inhibitor of the thermal equipment, which can simulate and research the corrosion resistance of the vapor phase corrosion inhibitor to the metal material of the thermal equipment under different temperature and humidity environments
In order to achieve the purpose, the invention adopts the following technical scheme:
a thermal equipment vapor phase corrosion inhibitor evaluation device comprises:
the air compressor 1 is used for providing a gas source of gas phase corrosion inhibitor carrier gas;
the gas heater 2 is used for heating the temperature of carrier gas of the vapor phase corrosion inhibitor, and a temperature measuring point 3 is arranged at the outlet of the gas heater 2 so as to control the output power of the gas heater 2;
the corrosion inhibitor gasification device 4 is used for heating and gasifying the vapor phase corrosion inhibitor, a porous ceramic partition plate 5 is horizontally arranged in the corrosion inhibitor gasification device, and vapor phase corrosion inhibitor particles and powder 6 are placed on the upper part of the porous ceramic partition plate 5;
a filter 7 for filtering the non-gasified corrosion inhibitor particles and powder;
a damp-heat test box 8, in which a corrosion test piece 9 is uniformly suspended for evaluating the corrosion resistance of the vapor phase corrosion inhibitor;
the air compressor 1 and the gas heater 2 are connected through a stainless steel pipeline, a first stop valve K1 is arranged on the stainless steel pipeline, an outlet of the gas heater 2 is connected with the bottom of the corrosion inhibitor gasification device 4 through the stainless steel pipeline, a third stop valve K3 is arranged on the stainless steel pipeline, a second stop valve K2 is arranged on a connecting exhaust branch path in front of the third stop valve K3, an outlet at the top of the corrosion inhibitor gasification device 4 is connected with the bottom of the damp-heat test box 8 through the stainless steel pipeline, a filter 7 and a fourth stop valve K4 are sequentially arranged on the stainless steel pipeline, and an exhaust port and a fifth stop valve K5 are arranged at the top of the damp-heat test box 8.
The heating temperature range of the gas heater 2 is 30-90 ℃.
The damp-heat test box 8 regulates and controls the temperature and the relative humidity in the box body, wherein the temperature control range is 20-50 ℃, and the relative humidity control range is 30-100%.
The corrosion test piece 9 is prepared from the same material of thermal equipment and is one or more of carbon steel, copper, stainless steel and alloy steel.
Firstly, putting gas phase corrosion inhibitor particles and powder 6 into a corrosion inhibitor gasification device 4, and suspending a corrosion test piece 9 into a damp-heat test box 8; closing the third, fourth and fifth cut-off valves K3, K4 and K5, opening the first and second cut-off valves K1 and K2, starting the air compressor 1 and the gas heater 2; monitoring the temperature of an outlet temperature measuring point 3 of the gas heater 2, when the air temperature reaches the test temperature, sequentially opening a fifth stop valve K5, a fourth stop valve K4 and a third stop valve K3, closing a second stop valve K2, and gasifying the gas phase corrosion inhibitor particles and the powder 6 into a damp-heat test box 8 by using a corrosion inhibitor gasifying device 4; detecting the exhaust pH value and the corrosion inhibitor concentration at the top exhaust pipe opening of the damp-heat test box 8, and closing the first stop valve K1, the fourth stop valve K4 and the fifth stop valve K5 in sequence when the corrosion inhibitor concentration meets the test requirements; the temperature of the damp-heat test box 8 and the relative humidity of the air are set to meet the test requirements, and the corrosion inhibitor performance evaluation test is started.
The technical scheme provided by the invention has the following beneficial effects:
the invention provides a vapor phase corrosion inhibitor evaluation device for thermal equipment, which is provided with a damp-heat test box, wherein corrosion test pieces made of different materials can be hung at the same time, the actual shutdown environment is simulated by controlling the temperature and the relative humidity of the damp-heat test box, the temperature of a gas heater is controlled according to the gasification temperature and the saturated steam temperature of a vapor phase corrosion inhibitor, the gasification rate of the vapor phase corrosion inhibitor is adjusted, the concentration of the vapor phase corrosion inhibitor in the damp-heat test box is further controlled, and therefore the corrosion protection performance of the vapor phase corrosion inhibitor on different materials of the thermal equipment can be obtained. By adopting the technical scheme provided by the invention, the corrosion prevention effect of the vapor phase corrosion inhibitor can be truly reflected, the application range is wide, and most working conditions can be evaluated; the equipment is simple, the operation is convenient, and the result is visual.
Drawings
FIG. 1 is a schematic diagram of a vapor phase corrosion inhibitor evaluation device for a thermodynamic equipment provided by an embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the invention 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 perform experimental research on these factors, the present embodiment provides an apparatus and a method for evaluating a vapor phase corrosion inhibitor for a thermal device, referring to fig. 1, the apparatus includes: the air compressor 1 is used for providing a gas source of gas phase corrosion inhibitor carrier gas; the gas heater 2 is used for heating the temperature of carrier gas of the vapor phase corrosion inhibitor, and a temperature measuring point 3 is arranged at the outlet of the gas heater 2 so as to control the output power of the gas heater 2; the corrosion inhibitor gasification device 4 is used for heating and gasifying the vapor phase corrosion inhibitor, a porous ceramic partition plate 5 is horizontally arranged in the corrosion inhibitor gasification device, and vapor phase corrosion inhibitor particles and powder 6 are placed on the upper part of the porous ceramic partition plate 5; a filter 7 for filtering the non-gasified corrosion inhibitor particles and powder; the inside of the damp-heat test box 8 can be uniformly suspended with corrosion test pieces 9 for evaluating the corrosion resistance of the vapor phase corrosion inhibitor. The air compressor 1 and the gas heater 2 are connected through a stainless steel pipeline and are provided with a stop valve K1, the air compressor 1 and the gas heater 2 are connected through a stainless steel pipeline, a first stop valve K1 is arranged on the stainless steel pipeline, the outlet of the gas heater 2 is connected with the bottom of the corrosion inhibitor gasification device 4 through a stainless steel pipeline, a third stop valve K3 is arranged on the stainless steel pipeline, a second stop valve K2 is arranged on a connecting exhaust branch in front of the third stop valve K3, the outlet of the top of the corrosion inhibitor gasification device 4 is connected with the bottom of the damp and hot test box 8 through a stainless steel pipeline, a filter 7 and a fourth stop valve K4 are sequentially arranged on the stainless steel pipeline, and the top of the damp and hot test box 8 is provided with an exhaust port and a fifth stop valve K5.
Firstly, putting gas phase corrosion inhibitor particles and powder 6 into a corrosion inhibitor gasification device 4, and suspending a corrosion test piece 9 into a damp-heat test box 8; closing the third, fourth and fifth cut-off valves K3, K4 and K5, opening the first and second cut-off valves K1 and K2, starting the air compressor 1 and the gas heater 2; monitoring the temperature of an outlet temperature measuring point 3 of the gas heater 2, when the air temperature reaches the test temperature, sequentially opening a fifth stop valve K5, a fourth stop valve K4 and a third stop valve K3, closing a second stop valve K2, and gasifying the gas phase corrosion inhibitor particles and the powder 6 into a damp-heat test box 8 by using a corrosion inhibitor gasifying device 4; detecting the exhaust pH value and the corrosion inhibitor concentration at the top exhaust pipe opening of the damp-heat test box 8, and closing the first stop valve K1, the fourth stop valve K4 and the fifth stop valve K5 in sequence when the corrosion inhibitor concentration meets the test requirements; the temperature of the damp-heat test box 8 and the relative humidity of the air are set to meet the test requirements, and the corrosion inhibitor performance evaluation test is started.
In a preferred embodiment of the present invention, the heating temperature of the gas heater 2 is in a range of 30 to 90 ℃.
As a preferred embodiment of the invention, the damp-heat test box 8 can regulate and control the temperature and the relative humidity in the box body, wherein the temperature control range is 20-50 ℃, and the relative humidity control range is 30-100%.
In a preferred embodiment of the present invention, the corrosion test piece 9 is made of the same material as the thermal device, and may be one or more of carbon steel, copper, stainless steel, and alloy steel.
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 invention, many simple modifications can be made to the technical solution of the invention. Including each of the specific features, are combined in any suitable manner. The invention 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 (5)
1. A vapor phase corrosion inhibitor evaluation device for thermal equipment is characterized by comprising the following components:
the air compressor (1) is used for providing a gas source of gas phase corrosion inhibitor carrier gas;
the gas heater (2) is used for heating the temperature of carrier gas of the vapor phase corrosion inhibitor, and a temperature measuring point (3) is arranged at the outlet of the gas heater (2), so that the output power of the gas heater (2) is controlled;
the corrosion inhibitor gasification device (4) is used for heating and gasifying a vapor phase corrosion inhibitor, a porous ceramic partition plate (5) is horizontally arranged in the corrosion inhibitor gasification device, and vapor phase corrosion inhibitor particles and powder (6) are placed on the upper part of the porous ceramic partition plate (5);
a filter (7) for filtering non-gasified corrosion inhibitor particles and powder;
the inside of the damp-heat test box (8) is uniformly suspended with a corrosion test piece (9) for evaluating the corrosion resistance of the vapor phase corrosion inhibitor;
the air compressor (1) is connected with the gas heater (2) through a stainless steel pipeline, a first stop valve (K1) is arranged on the stainless steel pipeline, an outlet of the gas heater (2) is connected with the bottom of the corrosion inhibitor gasification device (4) through the stainless steel pipeline, a third stop valve (K3) is arranged on the stainless steel pipeline, a second stop valve (K2) is arranged on a front-connected exhaust branch of the third stop valve (K3), an outlet at the top of the corrosion inhibitor gasification device (4) is connected with the bottom of the damp-heat test box (8) through the stainless steel pipeline, a filter (7) and a fourth stop valve (K4) are sequentially arranged on the stainless steel pipeline, and an exhaust port and a fifth stop valve (K5) are arranged at the top of the damp-heat test box (8).
2. The vapor phase corrosion inhibitor evaluation device for thermal equipment according to claim 1, wherein: the heating temperature range of the gas heater (2) is 30-90 ℃.
3. The vapor phase corrosion inhibitor evaluation device for thermal equipment according to claim 1, wherein: the damp-heat test box (8) adjusts and controls the temperature and the relative humidity in the box body, wherein the temperature control range is 20-50 ℃, and the relative humidity control range is 30-100%.
4. The vapor phase corrosion inhibitor evaluation device for thermal equipment according to claim 1, wherein: the corrosion test piece (9) is prepared from the same material of thermal equipment and is one or more of carbon steel, copper, stainless steel and alloy steel.
5. A method of operating a vapor phase corrosion inhibitor evaluation apparatus for a thermodynamic device as claimed in any one of claims 1 to 4, wherein: firstly, putting gas phase corrosion inhibitor particles and powder (6) into a corrosion inhibitor gasification device (4), and suspending a corrosion test piece (9) into a damp-heat test box (8); closing the third stop valve (K3), the fourth stop valve (K4) and the fifth stop valve (K5), opening the first stop valve (K1) and the second stop valve (K2), and starting the air compressor (1) and the gas heater (2); monitoring the temperature of an outlet temperature measuring point (3) of the gas heater (2), when the air temperature reaches a test temperature, sequentially opening a fifth stop valve (K5), a fourth stop valve (K4) and a third stop valve (K3), closing a second stop valve (K2), and gasifying the gas-phase corrosion inhibitor particles and the powder (6) into a damp-heat test box (8) by using a corrosion inhibitor gasifying device (4); detecting the pH value of exhaust gas and the concentration of a corrosion inhibitor at the top exhaust pipe opening of a damp-heat test box (8), and closing a first stop valve (K1), a fourth stop valve (K4) and a fifth stop valve (K5) in sequence when the concentration of the corrosion inhibitor meets the test requirement; setting the temperature of the damp-heat test box (8) and the relative humidity of air to meet the test requirements, and starting the corrosion inhibitor performance evaluation test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111011832.XA CN113588536A (en) | 2021-08-31 | 2021-08-31 | Device and method for evaluating vapor phase corrosion inhibitor of thermal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111011832.XA CN113588536A (en) | 2021-08-31 | 2021-08-31 | Device and method for evaluating vapor phase corrosion inhibitor of thermal equipment |
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| Publication Number | Publication Date |
|---|---|
| CN113588536A true CN113588536A (en) | 2021-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111011832.XA Pending CN113588536A (en) | 2021-08-31 | 2021-08-31 | Device and method for evaluating vapor phase corrosion inhibitor of thermal equipment |
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| CN (1) | CN113588536A (en) |
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- 2021-08-31 CN CN202111011832.XA patent/CN113588536A/en active Pending
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