CN220468101U - Atmospheric steam oxidation test device - Google Patents
Atmospheric steam oxidation test device Download PDFInfo
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- CN220468101U CN220468101U CN202322152910.9U CN202322152910U CN220468101U CN 220468101 U CN220468101 U CN 220468101U CN 202322152910 U CN202322152910 U CN 202322152910U CN 220468101 U CN220468101 U CN 220468101U
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- reaction chamber
- deionized water
- water tank
- test device
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- 230000003647 oxidation Effects 0.000 title claims abstract description 68
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 68
- 238000012360 testing method Methods 0.000 title claims abstract description 46
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 219
- 238000006243 chemical reaction Methods 0.000 claims abstract description 126
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 111
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 105
- 239000008367 deionised water Substances 0.000 claims abstract description 68
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 68
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 13
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims 9
- 238000002474 experimental method Methods 0.000 abstract description 4
- 238000010926 purge Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Abstract
The utility model relates to the technical field of oxidation test devices, and discloses a normal pressure steam oxidation test device, which comprises: the inner wall of the reaction chamber is enclosed to form a reaction cavity; the inlet end of the reaction chamber is provided with a first nitrogen inlet; the heating furnaces are arranged on two opposite sides of the reaction chamber; the deionized water tank is provided with a second nitrogen inlet; the first circulation pipeline is suitable for communicating the inlet end of the reaction chamber with the deionized water tank; the second circulation pipeline is suitable for communicating the outlet end of the reaction chamber with the water inlet of the deionized water tank; a condenser is arranged on the second circulating pipeline; the nitrogen steel cylinder is communicated with the first nitrogen inlet through a first nitrogen pipeline, and is communicated with the second nitrogen inlet through a second nitrogen pipeline, so that oxygen-free nitrogen is introduced into the reaction chamber and the deionized water tank. The utility model can ensure the simplicity of the steam oxidation and meet the precision requirement of the steam oxidation experiment.
Description
Technical Field
The utility model relates to the technical field of oxidation test devices, in particular to a normal pressure steam oxidation test device.
Background
In 300 MW-1000 MW thermal power plants currently in use at home, high-temperature steam accelerates oxidation of pipeline alloy materials, oxidation of pipelines in the steam is more serious than that in air, and oxidation mechanism is different from that in air. In the water vapor atmosphere, along with the temperature rise, the oxidation rate is obviously increased, and the oxidation product is Fe 3 O 4 、Fe 2 O 3 、(Fe，Cr) 3 O 4 And (Fe, cr) 2 O 3 Etc., but Cr 2 O 3 Phases may also occur. In the initial stage of oxidation, a protective oxide film is formed on the surface. With the increase of the oxidation rate and the change of the temperature, the thick oxide film shows larger growth stress and thermal stress, and the plastic deformation of the oxide film is smaller, so that the oxide film is often cracked and peeled off in the device maintenance process, the oxidation speed is further accelerated by peeling the pipeline and the oxide film, and finally the oxide scale is accumulated and blocked, so that the explosion tube leakage accident is caused.
In order to analyze the oxidation change process, the best method is to take a sample in the actual operation process at any time for analysis, but the operation of the boiler cannot be stopped at any time, so that the formation mechanism and the formation process of the oxide film need to be researched and simulated, and how to analyze the oxidation mechanism and simulate the actual oxidation process is a great laboratory work, so that the experiment is more close to the actual situation, and a water vapor oxidation device becomes a requirement.
However, the accuracy of the conventional tower type oxidation furnace device cannot meet the experimental requirements of steam oxidation, and a steam oxidation device capable of meeting the accuracy requirements is needed.
Disclosure of Invention
In view of the above, the utility model provides a normal pressure steam oxidation test device to solve the problem that the accuracy of the existing tower type oxidation furnace device cannot meet the experimental requirements of steam oxidation. According to the utility model, the first circulation pipeline and the second circulation pipeline are arranged, so that the circulation conversion between the high-temperature steam and the deionized cold water is facilitated, and the purity of the deionized cold water is ensured; the nitrogen steel bottle is communicated with the first nitrogen inlet through the first nitrogen pipeline, the nitrogen steel bottle is communicated with the second nitrogen inlet through the second nitrogen pipeline, and the nitrogen steel bottle is used for purging the whole system by introducing anaerobic nitrogen into the reaction chamber and the deionized water tank so as to ensure the simplicity of steam oxidation, thereby improving the accuracy of the result and meeting the precision requirement of the steam oxidation experiment.
The utility model provides a normal pressure steam oxidation test device, which comprises:
the inner wall of the reaction chamber is enclosed to form a reaction cavity; the inlet end of the reaction chamber is provided with a first nitrogen inlet;
the heating furnaces are arranged on two opposite sides of the reaction chamber;
the deionized water tank is provided with a second nitrogen inlet;
one end of the first circulating pipeline is communicated with the inlet end of the reaction chamber, and the other end of the first circulating pipeline is communicated with the water outlet of the deionized water tank;
one end of the second circulating pipeline is communicated with the outlet end of the reaction chamber, and the other end of the second circulating pipeline is communicated with the water inlet of the deionized water tank; the second circulating pipeline is provided with a condenser which is suitable for condensing the high-temperature steam discharged by the reaction cavity pipeline into water and leading the water into the deionized water tank again;
the nitrogen steel cylinder is communicated with the first nitrogen inlet through a first nitrogen pipeline, and is communicated with the second nitrogen inlet through a second nitrogen pipeline, so that oxygen-free nitrogen is introduced into the reaction chamber and the deionized water tank.
The deionized water tank is communicated with the inlet end of the reaction chamber through a first circulation pipeline so as to provide deionized cold water for the reaction chamber, and the deionized water tank is communicated with the outlet end of the reaction chamber through a second circulation pipeline so as to form a circulation pipeline between the reaction chamber and the deionized water tank, thereby realizing the circulation conversion between high-temperature steam and the deionized cold water and keeping the quantity of ions dissolved in water to the minimum; the nitrogen steel bottle is communicated with the first nitrogen inlet through the first nitrogen pipeline, the nitrogen steel bottle is communicated with the second nitrogen inlet through the second nitrogen pipeline, and the nitrogen steel bottle is used for purging the whole system by introducing anaerobic nitrogen into the reaction chamber and the deionized water tank so as to ensure the simplicity of steam oxidation, thereby improving the accuracy of the result.
In an alternative embodiment, the outlet end of the reaction chamber along the flow direction of the high-temperature steam is provided with a first valve, one end of the first valve is communicated with the reaction cavity channel, and the other end of the first valve is communicated with the second circulating pipeline;
the size of the overflow area of the first valve is adjustable, and the first valve is suitable for controlling the outflow speed of high-temperature steam in the reaction cavity channel.
The first valve controls the flow rate of high-temperature steam flowing from the reaction cavity channel to the second circulation pipeline by changing the flow area of the first valve, so as to control the progress of a high-temperature steam oxidation test of the metal material in the reaction cavity channel.
In an alternative embodiment, the inlet end of the reaction chamber is further provided with a deionized cold water inlet adapted to communicate the reaction chamber channel with the second circulation line.
The deionized cold water inlet and the first nitrogen inlet are both arranged at the inlet end of the reaction chamber, so that when deionized cold water enters the reaction cavity channel through the deionized cold water inlet, the first nitrogen inlet can timely introduce purging nitrogen into the reaction cavity channel to timely purge the just-formed high-temperature steam.
In an alternative embodiment, the first circulation pipeline is provided with a circulation pump, and the circulation pump is suitable for pumping deionized water in the deionized water tank into the reaction chamber, so that high-temperature steam in the circulation pipeline can circulate, and a sample in the reaction chamber can be continuously oxidized by the high-temperature steam.
In an alternative embodiment, the atmospheric pressure steam oxidation test device further comprises a pressure sensor adapted to monitor the high temperature steam pressure within the reaction chamber.
The detection end of the pressure sensor can be built in the reaction cavity channel to monitor the pressure of the high-temperature steam in the reaction cavity channel and generate a pressure signal, thereby reflecting the quantity of the high-temperature steam in the reaction cavity channel.
In an alternative embodiment, the atmospheric steam oxidation test device further comprises a controller, wherein the controller is electrically connected with the pressure sensor, the circulating pump and the first valve at the same time, and the controller is suitable for controlling the size of the overflow area of the first valve and/or the rotating speed of the circulating pump according to the pressure signal of the pressure sensor.
The controller is electrically connected with the pressure sensor so as to receive a pressure signal of the high-temperature steam in the reaction cavity, which is acquired by the pressure sensor, and is electrically connected with the circulating pump and the first valve so as to control the size of the overflow area of the first valve and/or the rotating speed of the circulating pump according to the pressure signal of the pressure sensor, thereby adjusting the quantity of the high-temperature steam in the reaction cavity.
In an alternative embodiment, a second valve is provided in the second nitrogen line, the second valve being adapted to selectively communicate the nitrogen cylinder with the deionized water tank.
During the entire sample exposure period, the second valve can be opened to place the nitrogen cylinder in communication with the deionized water tank, and the level of dissolved oxygen in the system can be minimized by purging the deionized water tank with nitrogen.
In an alternative embodiment, the first circulation pipeline is in sealing connection with the reaction chamber and the deionized water tank, the second circulation pipeline is in sealing connection with the reaction chamber and the deionized water tank, the first nitrogen pipeline is in sealing connection with the reaction chamber and the nitrogen steel cylinder, and the second nitrogen pipeline is in sealing connection with the deionized water tank and the nitrogen steel cylinder through stainless steel flanges, so that the whole normal-pressure steam oxidation test device forms a sealing system and is isolated from the outside, external oxygen is prevented from entering, simplicity of steam oxidation is ensured, and accuracy of test results is ensured.
In an alternative embodiment, the nitrogen cylinder is continuously fed with oxygen-free nitrogen for a period of time T before testing 0 ，T 0 Satisfy T 0 And (3) not less than 2 hours.
Before the test starts, the second valve can be opened to communicate the nitrogen steel cylinder with the deionized water tank, so that anaerobic nitrogen is purified in the whole circulation system for at least 2 hours, the level of dissolved oxygen in the system is reduced as much as possible, the simplicity of water vapor oxidation is ensured, and the accuracy of a test result is ensured.
In an alternative embodiment, the atmospheric steam oxidation test device further comprises a sample rack, wherein the sample rack is arranged in the reaction cavity; the sample rack is arranged in the reaction cavity along the high-temperature steam flow direction, so that the sample is arranged in the reaction cavity along the high-temperature steam flow direction, the consistency of the normal-pressure steam oxidation test device and the oxidation environment of the actual power station boiler pipeline is ensured, and the accuracy of the result is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the working principle of a normal pressure steam oxidation test device according to an embodiment of the present utility model.
Reference numerals illustrate:
10. a reaction chamber; 100. a reaction channel; 101. a first nitrogen inlet; 102. a deionized cold water inlet; 11. a first valve;
20. a heating furnace;
30. a deionized water tank; 31. a second nitrogen inlet;
41. a first circulation line; 411. a circulation pump; 42. a second circulation line; 421. a condenser;
50. a nitrogen steel cylinder; 51. a first nitrogen line; 52. a second nitrogen line; 521. a second valve;
60. a pressure sensor;
70. and a sample holder.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
An embodiment of the present utility model is described below with reference to fig. 1.
According to an embodiment of the present utility model, there is provided an atmospheric steam oxidation test apparatus including:
a reaction chamber 10, the inner wall of which encloses a reaction channel 100; the inlet end of the reaction chamber 10 is provided with a first nitrogen inlet 101;
heating furnaces 20 disposed at opposite sides of the reaction chamber 10;
the deionized water tank 30, the deionized water tank 30 is provided with a second nitrogen inlet 31;
a first circulation line 41 having one end connected to an inlet end of the reaction chamber 10 and the other end connected to a water outlet of the deionized water tank 30;
a second circulation line 42 having one end connected to an outlet end of the reaction chamber 10 and the other end connected to a water inlet of the deionized water tank 30; the second circulation line 42 is provided with a condenser 421, and the condenser 421 is adapted to condense the high-temperature steam discharged from the reaction chamber channel 100 into water and to feed the water again into the deionized water tank 30;
the nitrogen steel cylinder 50 is communicated with the first nitrogen inlet 101 through a first nitrogen pipeline 51, the nitrogen steel cylinder 50 is communicated with the second nitrogen inlet 31 through a second nitrogen pipeline 52, and the nitrogen steel cylinder 50 is suitable for introducing oxygen-free nitrogen into the reaction chamber 10 and the deionized water tank 30.
It should be noted that, referring to fig. 1, the heating furnaces 20 are disposed at two opposite sides of the reaction chamber 10 perpendicular to the flow direction of the high temperature steam, so as to fully heat the deionized cold water entering the reaction chamber channel 100, thereby rapidly forming the required high temperature steam; the deionized water tank 30 is positioned below the heating furnace 20, a water outlet of the deionized water tank 30 is communicated with an inlet end of the reaction chamber 10 through a first circulation pipeline 41 so as to provide deionized cold water in the reaction chamber 10, and the deionized water tank 30 is communicated with an outlet end of the reaction chamber 10 through a second circulation pipeline 42 so as to form a circulation pipeline between the reaction chamber 10 and the deionized water tank 30, thereby realizing circulation conversion between high-temperature steam and the deionized cold water and keeping the quantity of ions dissolved in water to the minimum; the nitrogen steel bottle 50 is communicated with the first nitrogen inlet 101 through the first nitrogen pipeline 51, the nitrogen steel bottle 50 is communicated with the second nitrogen inlet 31 through the second nitrogen pipeline 52, and the nitrogen steel bottle 50 is used for purging the whole system by introducing anaerobic nitrogen into the reaction chamber 10 and the deionized water tank 30 so as to ensure the simplicity of water vapor oxidation, thereby improving the accuracy of the result.
It is worth to say that, compared with the multistage arrangement of the high-temperature steam oxidation experimental device in the related art, the utility model is beneficial to the cyclic conversion between the high-temperature steam and the deionized cold water by arranging the first circulating pipeline 41 and the second circulating pipeline 42, ensures the purity of the deionized cold water, simplifies the experimental device and is beneficial to reducing the experimental cost; the deionized cold water in the deionized water tank 30 and the high-temperature steam in the reaction chamber 10 are purged by nitrogen, so that the simplicity of steam oxidation is ensured, and the accuracy of the test result of the high-temperature steam oxidation of the metal material is ensured.
In one embodiment, the outlet end of the reaction chamber 10 along the flow direction of the high-temperature steam is provided with a first valve 11, one end of the first valve 11 is communicated with the reaction cavity channel 100, and the other end is communicated with the second circulating pipeline 42;
the size of the overflow area of the first valve 11 is adjustable, and the first valve 11 is suitable for controlling the outflow speed of high-temperature steam in the reaction cavity channel 100.
It should be noted that, the first valve 11 and the reaction chamber 10 may be connected by a flange in a sealing manner; the size of the overflow area of the first valve 11 is adjustable, and the first valve 11 controls the flow rate of high-temperature steam flowing from the reaction cavity channel 100 to the second circulation pipeline 42 by changing the overflow area of the first valve, so as to control the progress of a high-temperature steam oxidation test of the metal material in the reaction cavity channel 100.
In one embodiment, the inlet end of the reaction chamber 10 is further provided with a deionized cold water inlet 102, the deionized cold water inlet 102 being adapted to communicate the reaction channel 100 with the second circulation line 42.
It should be noted that, referring to fig. 1, the inlet end refers to an end of the reaction chamber 10 opposite to the first valve 11 along the flow direction of the high temperature steam, and the outlet end and the inlet end are disposed opposite to each other along the flow direction of the high temperature steam in the reaction chamber 10. The deionized cold water inlet 102 and the first nitrogen inlet 101 are both disposed at the inlet end of the reaction chamber 10, so that when deionized cold water enters the reaction chamber 100 through the deionized cold water inlet 102, the first nitrogen inlet 101 can timely introduce purging nitrogen into the reaction chamber 100 to timely purge the high-temperature steam just formed.
In one embodiment, the first circulation line 41 is provided with a circulation pump 411, and the circulation pump 411 is adapted to pump deionized water in the deionized water tank 30 into the reaction chamber 10.
It should be noted that, the circulation pump 411 pumps deionized water in the deionized water tank 30 into the reaction chamber 10, so that the high temperature steam in the circulation line can circulate, and the sample in the reaction chamber 10 can be continuously oxidized by the high temperature steam.
In one embodiment, the atmospheric pressure steam oxidation test device further comprises a pressure sensor 60, the pressure sensor 60 being adapted to monitor the high temperature steam pressure within the reaction channel 100.
It should be noted that, referring to fig. 1, the detection end of the pressure sensor 60 may be built into the reaction chamber 100 to monitor the pressure of the high-temperature steam in the reaction chamber 100 and generate a pressure signal, so as to reflect the amount of the high-temperature steam in the reaction chamber 100.
In one embodiment, the atmospheric steam oxidation test device further comprises a controller electrically connected to the pressure sensor 60, the circulating pump 411 and the first valve 11, wherein the controller is adapted to control the size of the overflow area of the first valve 11 and/or the rotation speed of the circulating pump 411 according to the pressure signal of the pressure sensor 60.
It should be noted that the atmospheric steam oxidation test apparatus further includes a controller (not shown in fig. 1), which is electrically connected to the pressure sensor 60 to receive the pressure signal of the high-temperature steam in the reaction chamber 100 acquired by the pressure sensor 60, and is electrically connected to the circulation pump 411 and the first valve 11 to control the size of the flow area of the first valve 11 and/or the rotational speed of the circulation pump 411 according to the pressure signal of the pressure sensor 60, thereby adjusting the amount of the high-temperature steam in the reaction chamber 100.
In one embodiment, a second valve 521 is provided on the second nitrogen line 52, the second valve 521 being adapted to selectively communicate the nitrogen cylinder 50 with the deionized water tank 30.
The whole atmospheric steam oxidation test apparatus was a closed system. During the entire sample exposure period, the second valve 521 may be opened to place the nitrogen cylinder 50 in communication with the deionized water tank 30, minimizing the level of dissolved oxygen in the system by purging nitrogen into the deionized water tank 30.
In one embodiment, the first circulation line 41 is connected with the reaction chamber 10 and the deionized water tank 30, the second circulation line 42 is connected with the reaction chamber 10 and the deionized water tank 30, the first nitrogen line 51 is connected with the reaction chamber 10 and the nitrogen steel tank 50, and the second nitrogen line 52 is connected with the deionized water tank 30 and the nitrogen steel tank 50 in a sealing manner through stainless steel flanges.
It should be noted that, the first circulation pipeline 41 is in sealing connection with the reaction chamber 10 and the deionized water tank 30, the second circulation pipeline 42 is in sealing connection with the reaction chamber 10 and the deionized water tank 30, the first nitrogen pipeline 51 is in sealing connection with the reaction chamber 10 and the nitrogen steel bottle 50, and the second nitrogen pipeline 52 is in sealing connection with the deionized water tank 30 and the nitrogen steel bottle 50 through stainless steel flanges, so that the whole normal pressure steam oxidation test device forms a sealing system and is isolated from the outside, the entering of external oxygen is avoided, the simplicity of steam oxidation is ensured, and the accuracy of test results is ensured.
In one embodiment, nitrogen cylinder 50 continuously charges oxygen-free nitrogen into reaction chamber 10 and deionized water tank 30 for a period of time T prior to testing 0 ，T 0 Satisfy T 0 And (3) not less than 2 hours.
It should be noted that, before the test starts, the second valve 521 may be opened to connect the nitrogen cylinder 50 with the deionized water tank 30, so as to purge the whole circulation system of oxygen-free nitrogen for at least 2 hours, so as to minimize the level of dissolved oxygen in the system, ensure the simplicity of vapor oxidation, and ensure the accuracy of the test result.
In one embodiment, the atmospheric pressure steam oxidation test device further comprises a sample holder 70, the sample holder 70 being built into the reaction channel 100; the sample holder 70 is disposed in the reaction chamber channel 100 in the flow direction of the high-temperature steam.
It should be noted that, referring to fig. 1, the sample is a high-temperature superheater outlet pipe, and the sample rack 70 is disposed in the reaction chamber 100 along the high-temperature steam flow direction, so that the sample is disposed in the reaction chamber 100 along the high-temperature steam flow direction, which ensures the consistency of the normal-pressure steam oxidation test device and the oxidation environment of the actual power station boiler pipeline, and is beneficial to ensuring the accuracy of the result.
Optionally, the sample is taken from a high temperature superheater outlet T91 pipe, and the specification of the high temperature superheater outlet T91 pipe is phi 50.8mm multiplied by 10mm.
For better understanding, the following describes the test procedure of the atmospheric steam oxidation test apparatus:
placing a sample taken from a high-temperature superheater outlet T91 on a sample rack 70, opening a nitrogen steel cylinder 50 to enable nitrogen to enter and fill a reaction chamber 10 and a deionized water tank 30 through a first nitrogen pipeline 51 and a second nitrogen pipeline 52, and starting a normal-pressure high-temperature oxidation test after nitrogen purging and purification are continued for at least two hours;
starting a heating furnace 20, heating the reaction chamber 10 through the heating furnace 20 according to the test set temperature, pumping deionized water into the reaction chamber 10 through a circulating pump 411, starting circulating in the whole system, heating the deionized water in the reaction chamber 10 to become high-temperature steam, and oxidizing a sample;
the high-temperature vapor in the reaction chamber 10 enters the condenser 421 through the first valve 11 and the second circulation line 42 and is condensed into water in the condenser 421 to be returned into the deionized water tank 30;
the above process was continuously cycled to obtain a sufficiently aged normal pressure high temperature steam oxidized sample as required by the experiment.
Although embodiments of the present utility model have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations fall within the scope of the utility model as defined by the appended claims.
Claims (10)
1. An atmospheric pressure steam oxidation test device, comprising:
a reaction chamber (10) with an inner wall enclosing a reaction channel (100); the inlet end of the reaction chamber (10) is provided with a first nitrogen inlet (101);
heating furnaces (20) arranged on opposite sides of the reaction chamber (10);
the deionized water tank (30), wherein a second nitrogen inlet (31) is arranged on the deionized water tank (30);
a first circulation line (41) having one end connected to an inlet end of the reaction chamber (10) and the other end connected to a water outlet of the deionized water tank (30);
a second circulation line (42) having one end connected to an outlet end of the reaction chamber (10) and the other end connected to a water inlet of the deionized water tank (30); a condenser (421) is arranged on the second circulation pipeline (42), and the condenser (421) is suitable for condensing the high-temperature steam discharged by the reaction cavity (100) into water and leading the water into the deionized water tank (30) again;
the nitrogen gas steel bottle (50), nitrogen gas steel bottle (50) with be linked together through first nitrogen gas pipeline (51) between first nitrogen gas entry (101), nitrogen gas steel bottle (50) with be linked together through second nitrogen gas pipeline (52) between second nitrogen gas entry (31), nitrogen gas steel bottle (50) are suitable for to reaction chamber (10) with let in anaerobic nitrogen gas in deionized water tank (30).
2. The atmospheric pressure steam oxidation test device according to claim 1, wherein a first valve (11) is arranged at an outlet end of the reaction chamber (10) along the flow direction of the high-temperature steam, one end of the first valve (11) is communicated with the reaction cavity (100), and the other end is communicated with the second circulation pipeline (42);
the size of the overflow area of the first valve (11) is adjustable, and the first valve (11) is suitable for controlling the outflow speed of high-temperature steam in the reaction cavity (100).
3. Atmospheric steam oxidation test device according to claim 1, characterized in that the inlet end of the reaction chamber (10) is further provided with a deionized cold water inlet (102), the deionized cold water inlet (102) being adapted to communicate the reaction channel (100) with the second circulation line (42).
4. The atmospheric steam oxidation test device according to claim 2, wherein the first circulation pipeline (41) is provided with a circulation pump (411), and the circulation pump (411) is suitable for pumping deionized water in the deionized water tank (30) into the reaction chamber (10).
5. The atmospheric steam oxidation test device according to claim 4, further comprising a pressure sensor (60), the pressure sensor (60) being adapted to monitor the high temperature steam pressure within the reaction channel (100).
6. The atmospheric steam oxidation test device according to claim 5, further comprising a controller electrically connected to the pressure sensor (60), the circulation pump (411) and the first valve (11) at the same time, the controller being adapted to control the size of the flow area of the first valve (11) and/or the rotational speed of the circulation pump (411) in accordance with the pressure signal of the pressure sensor (60).
7. The atmospheric pressure steam oxidation test device according to claim 1, wherein a second valve (521) is provided on the second nitrogen line (52), the second valve (521) being adapted to selectively communicate the nitrogen cylinder (50) with the deionized water tank (30).
8. Atmospheric pressure steam oxidation test device according to any one of claims 1-7, wherein the first circulation line (41) and the reaction chamber (10) and the deionized water tank (30), the second circulation line (42) and the reaction chamber (10) and the deionized water tank (30), the first nitrogen line (51) and the reaction chamber (10) and the nitrogen steel tank (50) and the second nitrogen line (52) and the deionized water tank (30) and the nitrogen steel tank (50) are all connected by stainless steel flanges in a sealing manner.
9. Atmospheric pressure steam oxidation test device according to any one of claims 1-7, characterized in that the nitrogen cylinder (50) is turned towards the counter before the testThe duration of continuously introducing oxygen-free nitrogen into the reaction chamber (10) and the deionized water tank (30) is T 0 ，T 0 Satisfy T 0 And (3) not less than 2 hours.
10. The atmospheric pressure steam oxidation test device according to any one of claims 1-7, further comprising a sample holder (70), the sample holder (70) being built into the reaction channel (100); the sample holder (70) is disposed in the reaction channel (100) along the flow direction of the high-temperature steam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322152910.9U CN220468101U (en) | 2023-08-10 | 2023-08-10 | Atmospheric steam oxidation test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322152910.9U CN220468101U (en) | 2023-08-10 | 2023-08-10 | Atmospheric steam oxidation test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220468101U true CN220468101U (en) | 2024-02-09 |
Family
ID=89775326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322152910.9U Active CN220468101U (en) | 2023-08-10 | 2023-08-10 | Atmospheric steam oxidation test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220468101U (en) |
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2023
- 2023-08-10 CN CN202322152910.9U patent/CN220468101U/en active Active
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