CN211426474U - Visual experiment system for coal coke and slag wall surface reaction - Google Patents
Visual experiment system for coal coke and slag wall surface reaction Download PDFInfo
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- CN211426474U CN211426474U CN201921445999.5U CN201921445999U CN211426474U CN 211426474 U CN211426474 U CN 211426474U CN 201921445999 U CN201921445999 U CN 201921445999U CN 211426474 U CN211426474 U CN 211426474U
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Abstract
The utility model discloses a visual experimental system for the reaction of coal coke and slag wall, which comprises an observation device and a reaction furnace, wherein the reaction furnace comprises a thermocouple, a furnace body and a furnace chamber formed in the furnace body, and the thermocouple passes through the furnace body and extends into a furnace chamber; a high-temperature-resistant tray is arranged in the hearth, and the high-temperature-resistant tray is obliquely arranged at an angle of 15-30 degrees with the horizontal plane; a coke feeding hole is arranged on the furnace body above the high-temperature resistant tray, a glass observation window is arranged on the side wall of the furnace body, a reducing atmosphere air inlet is arranged on the furnace body above the high-temperature resistant tray, and an exhaust hole is arranged on the furnace body below the high-temperature resistant tray so as to exhaust the gas in the hearth; the observation equipment is used for observing the upper surface of the high-temperature-resistant tray. The utility model provides a real-time normal position detection problem of coke in the reaction of slag wall department and motion behavior, provide the foundation for the abundant research gasification reaction mechanism.
Description
Technical Field
The utility model belongs to the coal gasification field, concretely relates to visual experiment system of coke and slag wall reaction.
Background
The flow of the slag in the coal gasification process not only affects the stable operation and the efficient operation of the gasifier, but also reduces the gasification efficiency due to the generation of carbon residue in the slag. The residual carbon and the mineral substances in the coal form melt crystals in the cooling and slagging process, the crystals are stable and are not easy to damage, and the difficulty of separating the residual carbon is improved. Because the internal environment of the gasification furnace is very complex during the hot state operation and is limited by research means, no experimental device capable of completely mastering the deposition rule of the particles on the wall surface of the gasification furnace exists at present. The method has the advantages that the reaction of coal coke particles on the slag wall surface is simulated by using a visual experimental system, and the complex processes of gas-solid, liquid-solid and gas-liquid, such as particle deposition, wall surface particle reaction, slag flowing, crystallization behavior, carbon slag reaction and the like of the coal coke on the slag wall surface can be visually obtained in situ by matching with related professional equipment, so that a basis is provided for a gasification reaction mechanism. At present, no mature experimental system related to the reaction process of the coal coke and the slag wall surface is found.
Disclosure of Invention
An object of the utility model is to provide a coal coke and slag wall reaction's visual experimental system to solve the coal coke and locate the reaction and the real-time normal position detection problem of motion behavior in slag wall, provide the foundation for the abundant research gasification reaction mechanism.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a visual experiment system for coal and slag wall reaction is characterized by comprising observation equipment and a reaction furnace, wherein the reaction furnace comprises a thermocouple, a furnace body and a furnace chamber formed in the furnace body, and the thermocouple penetrates through the furnace body and extends into a hearth so as to monitor the temperature in the hearth; a high-temperature-resistant tray is arranged in the hearth, and the high-temperature-resistant tray is obliquely arranged at an angle of 15-30 degrees, such as 20-25 degrees, with the horizontal plane; a coke feeding hole is formed in the furnace body above the high-temperature-resistant tray, so that coke can be fed at least partially onto the high-temperature-resistant tray; a glass observation window is arranged on the side wall of the furnace body, and the glass observation window is arranged at a position where the upper surface of the high-temperature-resistant tray can be seen through the glass observation window;
a reducing atmosphere inlet is arranged on the furnace body above the high-temperature resistant tray so as to maintain the reducing atmosphere in the hearth; an exhaust port is arranged on the furnace body below the high-temperature-resistant tray to exhaust gas in the hearth;
the observation equipment is arranged by aligning the glass observation window to the upper surface of the high-temperature-resistant tray, comprises one or more of a high-speed camera and a spectrum camera, and is used for observing the upper surface of the high-temperature-resistant tray.
According to the utility model discloses a visual experimental system, in an embodiment, visual experimental system still includes feed bin, screw feeder and inlet pipe, wherein, the feed bin be used for to the screw feeder supplies coke, the screw feeder is used for with coke under the assistance of nitrogen gas as the carrier gas under the inlet pipe is sent into furnace, the inlet pipe passes through flange joint to the coke feed inlet.
According to the utility model discloses a visual experimental system, in an embodiment, the furnace body includes the refractory material of shell and inside lining, wherein, the shell is double-deck stainless steel cylinder body, the upper end of shell is equipped with cooling water discharge opening, lower extreme and is equipped with the cooling water inlet to it is cooling to lead to the water the shell is all around.
According to the utility model discloses a visual experimental system, in an embodiment, still be equipped with the furnace gate on the furnace body to high temperature resistant tray gets in the furnace and puts.
According to the utility model discloses a visual experimental system, in an embodiment, the glass observation window sets up on the furnace gate.
According to the present invention, in one embodiment, the furnace door comprises a double-layer shell which can be cooled by water and a lining of refractory material; and a nitrogen purging pipe is arranged at the position of the glass observation window and used for purging and cleaning the inner surface of the glass observation window.
According to the utility model discloses a visual experimental system, in an embodiment, the reacting furnace heats as heating element with the elema, the elema is close to high temperature resistant tray setting in furnace.
According to the visual experimental system of the utility model, in one embodiment, the high temperature resistant tray is a ceramic plate, the upper surface of which is paved with gasified ash to form slag wall surface, and then contacts with coal coke to research the reaction between the two, and the high temperature resistant tray is placed in the furnace chamber through a refractory brick padded at the bottom; the gasified ash can be ash entrained in raw gas, such as ash with particle diameters that can pass through 100 mesh or even 200 mesh standard sieve holes, so that better reaction is facilitated for observation.
According to the utility model discloses a visual experimental system, in an embodiment, be equipped with the cooling water passageway in the flange so that cooling, protection junction.
Compared with the prior art, the utility model has the advantages of it is following:
the utility model discloses a visual experimental system for coal coke and slag wall reaction, through the characteristic change of visual window real-time supervision coal coke reaction in-process, and through utilizing high temperature electric heating element to simulate the interior high temperature environment of gasifier; meanwhile, aiming at the problem of setting reducing atmosphere in the gasification furnace, reducing gas is introduced to enable the coal coke and the molten slag to react in the reducing atmosphere; in addition, for the problem of monitoring the reaction process of the coke and the wall surface of the molten slag, as the coke contains alkali metal elements such as Na and K, free radicals such as OH are generated in the reaction process, and corresponding spectrum signals can be generated in the free radical excitation process, the reaction process is monitored in real time by arranging a hyperspectral system and an ultraviolet system, and the characteristic change of each process is analyzed by using a high-resolution camera.
Drawings
Fig. 1 is a schematic view of a visual experimental system of the present invention;
FIG. 2 is a schematic view of a reaction furnace.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited thereto.
In the present invention, the terms "upper", "lower", "left", "right", "front" and "rear" refer to the directions in the drawings.
As shown in fig. 1 and 2, the visual experiment system for coal and slag wall reaction of the present invention comprises a reaction furnace 1 and an observation device 2, wherein the reaction furnace 1 comprises a thermocouple 10, a furnace body 11 and a furnace chamber 12 formed in the furnace body, the thermocouple 10, such as a platinum-rhodium thermocouple, penetrates through the furnace body 11 and extends into a furnace chamber 12 so as to monitor the temperature in the furnace chamber; a high-temperature-resistant tray 18 is arranged in the hearth 12, and the high-temperature-resistant tray 18 is obliquely arranged at an angle of 15-30 degrees, such as 20 or 25 degrees, with the horizontal plane; a coke feeding hole 13 is arranged on the furnace body 11 above the high-temperature-resistant tray 18, so that the coke feeding can at least partially fall on the high-temperature-resistant tray 18; a glass observation window 16, such as a quartz glass observation window, is arranged on the side wall of the furnace body 11, and the position of the glass observation window 16 is set to a position where the upper surface of the high temperature resistant tray 18 can be seen through the glass observation window 16; the high temperature resistant tray 18 can be a ceramic plate, and a refractory brick 19 placed through the bottom pad is placed in the hearth 12, and can be fixed in the hearth by other methods.
In one embodiment, the furnace body 11 comprises an outer shell and an inner lining of refractory material, wherein the outer shell is a double-layer stainless steel cylinder, such as 304 stainless steel, and the outer shell is provided with a cooling water discharge opening (not shown) at the upper end and a cooling water inlet opening (not shown) at the lower end so as to be filled with water to cool the periphery of the outer shell. The furnace body 11 is also provided with a furnace door 17 so as to facilitate the taking and placing of a high-temperature resistant tray 18 in the hearth 12, and the glass observation window 16 is arranged on the furnace door 17. The furnace door 17 comprises a double-layer shell which can be cooled by water and a refractory material of an inner lining; the glass inspection window 16 is provided with a nitrogen purge tube (not shown) for purging the inner surface of the glass inspection window 16 for observation. The refractory material can be polycrystalline mullite fiber, has the characteristics of high refractoriness, good heat preservation and the like, and is prepared by adopting a vacuum casting molding process.
A reducing atmosphere inlet 14 is arranged on the furnace body 11 above the high-temperature resistant tray 18 and can be connected with an external air source through a flange so as to introduce carbon monoxide and carbon dioxide to maintain the reducing atmosphere in the hearth 12; an exhaust port 15 is arranged on the furnace body 11 below the high-temperature resistant tray 18 to exhaust gas in the hearth 12. The discharged gas can be cooled and then incinerated.
The observation device 2 is arranged by aligning with the upper surface of the high-temperature-resistant tray 18 through the glass observation window 16, comprises one or more of a high-speed camera and a spectrum camera, and is used for observing the upper surface of the high-temperature-resistant tray 18, and observation data are stored in a computer for analysis. For example, a spectral camera is used for combining and shooting two-dimensional distribution change characteristics of free radicals such as OH in the coal tar particle deposition process at the slag wall surface (namely the surface of a ceramic plate), and a reaction area and temperature distribution of the coal tar particle surface are characterized according to the free radical intensity so as to analyze the internal volatile component reaction process in the coal tar particle temperature rise process on the slag wall surface. The hyperspectral camera system is used for shooting the radiation intensity of alkali metal free radicals such as K, Na and the like of the coal tar particles in the slag wall surface reaction process in real time so as to analyze the occurrence change of the alkali metal in the gasification reaction process, clarify the mineral substance conversion characteristics in the coal tar particles, and reveal the slag wall surface gasification reaction and the carbon slag reaction process by combining the coal tar particle gasification reaction on the slag wall surface.
In one embodiment, the visual experimental system further comprises a silo 31, a screw feeder 32 and a feeding pipe 33, wherein the silo 31 is used for supplying coke to the screw feeder 32, the screw feeder 32 is used for feeding the coke into the hearth through the feeding pipe 33 with the aid of nitrogen as a carrier gas, and the feeding pipe 33 is connected to the coke feeding port 13 through a flange.
In one embodiment, the reactor is heated by using silicon carbide rods (not shown) as heating elements, and is arranged in the hearth 12 close to the high-temperature-resistant tray 18, for example, U-shaped silicon carbide rods are inserted as heating elements at two sides of the hearth, the leading-out wires of the silicon carbide rods are provided with water-cooling protective covers and sealing electrodes, and the outer sides of the electrodes are also provided with protective covers for connecting external heating cables.
During operation, the upper surface of the ceramic plate 18 is pre-paved with gasified ash, coal coke particles with the particle size of 50-100 microns, such as about 70 microns, in the storage bin 31 enter the hearth 12 from the top of the reaction furnace 1 through the screw feeder 32 under the assistance of carrier gas, and carbon monoxide and carbon dioxide are introduced through the reducing atmosphere inlet 14 to maintain the reducing atmosphere in the hearth and simulate the gasification environment; the char is preheated in the downward process and at least partly falls onto the ceramic plate 18, reacts with the melter gasifier ash and is investigated by observation by means of the observation device 2. The obtained gas in the furnace 12 is sent out through an exhaust port 15 provided in the furnace body 11.
The utility model discloses in, can be equipped with the cooling water passageway so that cooling, protection junction when needing in the flange for flange joint, guarantee that the experiment goes on safely.
The above embodiments are provided only for the purpose of illustration, and not for the purpose of limitation, and those skilled in the art can also make various changes and modifications without departing from the spirit and scope of the present invention, and therefore, all equivalent technical solutions should also belong to the protection scope of the present invention.
Claims (9)
1. A visual experiment system for the reaction of coal coke and a slag wall surface is characterized by comprising observation equipment and a reaction furnace, wherein the reaction furnace comprises a thermocouple, a furnace body and a furnace chamber formed in the furnace body, and the thermocouple penetrates through the furnace body and extends into a hearth so as to monitor the temperature in the hearth; a high-temperature-resistant tray is arranged in the hearth, and the high-temperature-resistant tray is obliquely arranged at an angle of 15-30 degrees with the horizontal plane; a coke feeding hole is formed in the furnace body above the high-temperature-resistant tray, so that coke can be fed at least partially onto the high-temperature-resistant tray; a glass observation window is arranged on the side wall of the furnace body, and the glass observation window is arranged at a position where the upper surface of the high-temperature-resistant tray can be seen through the glass observation window;
a reducing atmosphere air inlet is arranged on the furnace body above the high-temperature resistant tray and is connected with an external air source through a flange so as to maintain the reducing atmosphere in the hearth; an exhaust port is arranged on the furnace body below the high-temperature-resistant tray to exhaust gas in the hearth;
the observation equipment is arranged by aligning the glass observation window to the upper surface of the high-temperature-resistant tray, comprises one or more of a high-speed camera and a spectrum camera, and is used for observing the upper surface of the high-temperature-resistant tray.
2. A visual experimental system according to claim 1, further comprising a silo for supplying coke to the screw feeder, a screw feeder for feeding coke into the furnace chamber through the feeding pipe with the aid of nitrogen as carrier gas, and a feeding pipe connected to the coke feeding port through a flange.
3. A visual experiment system according to claim 1 or 2, wherein the furnace body comprises a shell and a lining made of refractory materials, wherein the shell is a double-layer stainless steel cylinder body, the upper end of the shell is provided with a cooling water discharge port, and the lower end of the shell is provided with a cooling water inlet so as to be convenient for water to flow to cool the periphery of the shell.
4. The visual experiment system according to claim 3, wherein a furnace door is further arranged on the furnace body so as to facilitate taking and placing of the high-temperature-resistant tray in the hearth.
5. The visual experiment system according to claim 4, wherein the glass observation window is provided on the oven door.
6. The visual experiment system according to claim 5, wherein the oven door comprises a double-layer shell which can be cooled by water and a refractory material of an inner lining; and a nitrogen purging pipe is arranged at the position of the glass observation window and used for purging and cleaning the inner surface of the glass observation window.
7. A visual experiment system according to claim 1 or 6, wherein the reaction furnace is heated by taking a silicon carbide rod as a heating element, and the silicon carbide rod is arranged close to the high-temperature-resistant tray in the hearth.
8. A visual experiment system according to claim 7, wherein the refractory tray is a ceramic plate, and refractory bricks laid down through the bottom are placed in the hearth.
9. A visual experiment system according to claim 1 or 8, wherein a cooling water channel is arranged in the flange for cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921445999.5U CN211426474U (en) | 2019-09-02 | 2019-09-02 | Visual experiment system for coal coke and slag wall surface reaction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921445999.5U CN211426474U (en) | 2019-09-02 | 2019-09-02 | Visual experiment system for coal coke and slag wall surface reaction |
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| CN211426474U true CN211426474U (en) | 2020-09-04 |
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| CN201921445999.5U Active CN211426474U (en) | 2019-09-02 | 2019-09-02 | Visual experiment system for coal coke and slag wall surface reaction |
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