CN115178195B - Pressurized bubbling fluidized bed cold die experimental device - Google Patents
Pressurized bubbling fluidized bed cold die experimental device Download PDFInfo
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- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/1809—Controlling processes
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- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/1818—Feeding of the fluidising gas
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- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/1872—Details of the fluidised bed reactor
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/20—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium
- B01J8/22—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00539—Pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00548—Flow
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model provides a cold mould experimental device of a pressurized bubbling fluidized bed, which comprises a thin rectangular pressurized bubbling fluidized bed, an air supply system and a monitoring system, wherein the air supply system supplies pressurized air to the thin rectangular pressurized bubbling fluidized bed; the thin rectangular pressurizing bubbling fluidized bed sequentially comprises a lower metal fluidized bed section, a visual fluidized bed section and an upper metal fluidized bed section from bottom to top, wherein the upper metal fluidized bed section and the lower metal fluidized bed section are made of stainless steel materials, and the visual fluidized bed section is made of organic glass materials; the cross section of the thin rectangular pressurized bubbling fluidized bed is rectangular, the length of the short side of the rectangle is not more than 5cm, and the thin rectangular pressurized bubbling fluidized bed can realize visualization and on-line monitoring of complex gas-solid flow in the fluidized bed under the condition of a pressurized experiment, so that the dynamic evolution rule of bubbles and the flow pattern of a fluid field in the fluidized bed are known.
Description
Technical Field
The utility model belongs to the technical fields of pressurized fluidized bed reactors, fluidized bed dynamics research experiment devices and the like, and particularly relates to a pressurized bubbling fluidized bed cold die experiment device.
Background
Oxygen-enriched combustion technology is also called O 2 /CO 2 In the normal pressure oxygen-enriched combustion system, O with high concentration is first separated in an air separator 2 Mixing with recirculated flue gas of boiler, introducing into combustion furnace, mixing with pulverized coal, and removing ash and fume to obtain C0 with content of more than 90% 2 Compressing the flue gas to C0 2 Recycling. C0 in boiler with traditional combustion mode 2 Compared with the content of 10 to 14 percent, the content of C0 can be greatly reduced by carrying out oxygen-enriched combustion 2 Is not limited by the separation cost of the catalyst.
But due to space division unit and CO 2 The compression passivation unit is carried out under high pressure, the oxygen-enriched combustion unit is carried out under normal pressure, the pressure rise-fall-rise change occurs in the system, and more serious energy loss exists. Thus a novel low-energy consumption CO is provided 2 The key of the trapping technology is to replace the normal pressure boiler by using a pressurized fluidized bed boiler. Because the gas density in the bed is increased under the pressurized environment, the interaction between the gas and the solid can be effectively enhanced, and the volume of the equipment is reduced, thereby accelerating the chemical reaction rate and improving the heat transfer efficiency. Compared with the normal pressure oxygen-enriched combustion technology, the method can effectively reduce the air separation oxygen generation unit and CO 2 The pressure drop loss caused by the mismatch of the high pressure of the compression passivation unit and the combustion pressure of the normal pressure hearth realizes the pressure cascade utilization, and the efficiency of the combustion system can be improved by about 3 to 5 percent.
However, the internal flow field of the pressurized bubbling fluidized bed is complex, the measuring environment under high pressure is bad, most traditional measuring means are limited in application, probe measuring components such as a capacitor, an optical fiber and the like are easy to damage under the pressurized state, and a camera shooting tool cannot shoot the dense gas-solid bubbling bed formed under the pressurized state, so that the research and the knowledge of the dynamic evolution rule of the pressurized bubbles are still deficient at present. The existing experimental device is also mostly a fluidized bed thermogravimetric analysis system for real-time and accurate measurement of gas-solid reaction dynamics under normal pressure, as disclosed in patent document CN109030272A, which is a real-time measurement system of gas-solid reaction dynamics in a fluidized bed under normal pressure; the utility model patent CN207457112U discloses a fluidized bed drying experimental device which can detect simple parameters such as pressure, temperature change and the like, but is difficult to detect flow field parameters such as bubbling state, turbulent state and the like under a pressurized state.
Disclosure of Invention
In view of the above state of the art, an object of the present utility model is to provide a pressurized bubbling fluidized bed cold mold experimental apparatus capable of measuring the flow condition of the bed in the pressurized fluidized bed in a pressurized experimental state and obtaining the bubble characteristics and the flow pattern in the fluidized bed.
The technical scheme adopted by the utility model is as follows: the cold die experimental device for the pressurized bubbling fluidized bed is characterized by comprising a thin rectangular pressurized bubbling fluidized bed, an air supply system and a monitoring system, wherein the air supply system supplies pressurized air to the thin rectangular pressurized bubbling fluidized bed; the thin rectangular pressurizing bubbling fluidized bed sequentially comprises a lower metal fluidized bed section, a visual fluidized bed section and an upper metal fluidized bed section from bottom to top, wherein the upper metal fluidized bed section and the lower metal fluidized bed section are made of stainless steel materials, and the visual fluidized bed section is made of organic glass materials; the cross section of the thin rectangular pressurized bubbling fluidized bed is rectangular, and the length of the short side of the rectangle is not more than 5cm;
one side face perpendicular to the thickness direction of the visual fluidized bed section is a light-transmitting observation face, the other three side faces are all arranged to face the light-reflecting face reflecting light inside the visual fluidized bed section, and specifically, the other three side faces of the non-observation face are all attached with a light-reflecting plate, or the other three side faces of the non-observation face are all coated with light-reflecting paint or mirror surface paint, so that the three inner side faces of the visual fluidized bed section are light-reflecting faces, and the inside of the visual fluidized bed section is shown to be a lamp box effect under the light irradiation of the observation side.
The side wall of the lower metal fluidized bed section is provided with a lower pressure measuring hole, the side wall of the upper metal fluidized bed section is provided with an upper pressure measuring hole, the upper pressure measuring hole and the lower pressure measuring hole are connected through a pressure measuring pipe, and a differential pressure transmitter is arranged; the side wall of the visual fluidized bed section is provided with a plurality of layers of pressure measuring holes along the height direction, the visual fluidized bed section is connected with a pressure measuring pipe through a quick connector and is connected to a differential pressure transmitter for measuring differential pressure fluctuation signals in different height intervals of the fluidized bed, so that gas-solid flow information of different axial positions is obtained.
The monitoring system comprises a flowmeter, a high-speed camera, a computer, a differential pressure transmitter and an NI board card, wherein the flowmeter is arranged on a front pipeline of an air inlet of the thin rectangular pressurized bubbling fluidized bed and is used for measuring the flow of pressurized air; the high-speed camera is arranged on one side of the observation surface of the thin rectangular pressurized bubbling fluidized bed; the differential pressure transmitter monitors the bed pressure drop and pressure difference fluctuation of the thin rectangular pressurizing bubbling fluidized bed, and the NI board card is connected with the differential pressure transmitter and the computer and is used for processing an analog current signal generated by the differential pressure transmitter and converting the analog current signal into a digital signal on the computer in real time.
The middle section of the lower metal fluidized bed section is horizontally provided with an air distribution plate, and the air distribution plate is made of a metal sintering plate so as to realize uniform air distribution; an air inlet is formed in the side wall corresponding to the air chamber, and is connected with an air supply system through a metal pipeline so that pressurized air enters the thin rectangular pressurized bubbling fluidized bed; the lower metal fluidized bed section is provided with a discharge opening on the side wall above the air distribution plate, the height of the discharge opening corresponds to the height of the air distribution plate, and the lower metal fluidized bed section is used for discharging glass bead particles in the fluidized bed when the bed material is replaced. The upper part of the upper metal fluidized bed section is also provided with a feed inlet, the feed inlet is used for adding glass bead particles, the top of the upper metal fluidized bed section is also provided with a pressure gauge interface and an exhaust pipe, the exhaust pipe is divided into a first branch and a second branch, the first branch is provided with a pressure safety valve through a safety valve interface, the second branch of the exhaust pipe is provided with an exhaust port which is controlled to be opened and closed by a valve, and the exhaust port is used for exhausting pressurized gas out of the fluidized bed.
The air supply system comprises a screw compressor, an air storage tank, an air filter and a cold dryer which are sequentially connected in series, wherein an outlet pipeline of the cold dryer is communicated with an air inlet of the thin rectangular pressurized bubbling fluidized bed, the air storage tank is used for storing high-pressure air supplied by the buffer screw compressor, impurities are filtered by the air filter and then enter the cold dryer for cooling and drying, and then the impurities are conveyed into the thin rectangular pressurized bubbling fluidized bed, and a flowmeter is further connected between the cold dryer and the air inlet of the thin rectangular pressurized bubbling fluidized bed.
In order to facilitate the assembly of a laboratory, the lower end of the upper metal fluidized bed section is fixedly arranged on the upper flange, the upper end of the lower metal fluidized bed section is fixedly arranged on the lower flange, the visual fluidized bed section is fixedly arranged between the upper flange and the lower flange, four corners of the upper flange and the lower flange are respectively and fixedly limited through a long bolt, and the fixed installation of the lower metal fluidized bed section, the visual fluidized bed section and the upper metal fluidized bed section is realized.
The technical scheme of the utility model has the advantages that:
1. the method is suitable for experimental study of the pressurized fluidized bed, the bed pressure difference fluctuation signal obtained by the differential pressure transmitter reflects the change of the bubble state, and simultaneously, the method is instantly corresponding to the shooting image of the high-speed camera, and the two means are combined to obtain the bubble characteristic of the experimental device and the flow pattern in the fluidized bed, so that the data accuracy is higher, and the problems that the measuring environment is bad under high pressure, the traditional measuring means (such as probes of capacitance, optical fiber and the like) are limited in application and the dynamic evolution rule of the pressurized bubble cannot be studied are solved;
2. the thickness of the thin rectangular fluidized bed is reduced, the thin rectangular fluidized bed is specifically set at 5cm or below, a visible window is formed by utilizing the pressure-bearing characteristic of the organic glass, and meanwhile, the light transmittance is enhanced by attaching the reflecting plate, so that the defect that a dense gas-solid bubbling bed photographing optical measurement method is not applicable is overcome, and the experimental device can photograph the bubble evolution state through a high-speed camera;
3. the visual fluidized bed section is provided with a plurality of layers of pressure measuring holes along the height, and is connected with a pressure measuring pipe and a differential pressure transmitter through a quick connector, so that internal gas-solid flow signal data can be obtained on the premise of not interfering an internal flow field of the fluidized bed.
Drawings
FIG. 1 is a schematic diagram of the overall flow of the experimental apparatus of the present utility model;
FIG. 2 is a schematic cross-sectional view of a thin rectangular pressurized bubbling fluidized bed of the experimental setup of the utility model;
in the figure: 1. the device comprises a thin rectangular pressurized bubbling fluidized bed, 2, a screw compressor, 3, an air storage tank, 4, an air filter, 5, a cold dryer, 6, a flowmeter, 7, a computer, 8, a high-speed camera, 9, a visual fluidized bed section, 10, an upper metal fluidized bed section, 11, an air inlet, 12, a lower metal fluidized bed section, 13, an air distribution plate, 14, a discharge opening, 15, a differential pressure transmitter, 16, a quick connector, 17, a lower pressure measuring hole, 18, a feed inlet, 19, a pressure meter interface, 20, an air outlet, 21, a safety valve interface, 22, an upper pressure measuring hole, 23 and an NI board card.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or imply that the devices or elements being referred to must be oriented or operated in a particular orientation and are not intended to be limiting. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The utility model discloses a cold mould experimental device of a pressurized bubbling fluidized bed, which is shown in fig. 1 and is a schematic diagram of the whole flow of the experimental device, and comprises a thin rectangular pressurized bubbling fluidized bed 1, an air supply system and a monitoring system, wherein the air supply system comprises a screw compressor 2, an air storage tank 3, an air filter 4 and a cold dryer 5 which are sequentially connected in series, an outlet pipeline of the cold dryer 5 is communicated with an air inlet of the thin rectangular pressurized bubbling fluidized bed 1, the air storage tank 3 is used for storing high-pressure air supplied by the buffer screw compressor 2, impurities are filtered by the air filter 4 and then enter the cold dryer 5 for cooling and drying, and then the cooled air is conveyed into the thin rectangular pressurized bubbling fluidized bed 1, and a flowmeter 6 is further connected between the cold dryer 5 and the air inlet of the thin rectangular pressurized bubbling fluidized bed 1; the monitoring system comprises a high-speed camera 8, a computer 7 and a differential pressure transmitter 15, wherein the differential pressure transmitter is arranged on the thin rectangular pressurizing bubbling fluidized bed 1, the high-speed camera 8 shoots a visible section of the thin rectangular pressurizing bubbling fluidized bed 1 at a high speed, and the computer 7 is used for processing bed measurement data.
Fig. 2 is a schematic cross-sectional view of a thin rectangular pressurized bubbling fluidized bed of the experimental apparatus according to the present utility model, as shown in the drawing, the thin rectangular pressurized bubbling fluidized bed 1 is sequentially composed of a lower metal fluidized bed section 12, a visual fluidized bed section 9 and an upper metal fluidized bed section 10 from bottom to top, the upper and lower metal fluidized bed sections are made of stainless steel materials, the visual fluidized bed section is made of organic glass, in the technical scheme of the present utility model, the thin rectangular pressurized bubbling fluidized bed 1 is a thin rectangular bed body, wherein the thickness of the thin rectangular pressurized bubbling fluidized bed 1 is preferably 5cm or less, i.e. the cross-section of the thin rectangular pressurized bubbling fluidized bed is rectangular, the short side length of the rectangle is not greater than 5cm, and the back surface and two narrow sides of the visual fluidized bed section 9 are attached with reflective plates, or reflective coatings or mirror coatings are coated on the other three sides of the non-observation side of the visual fluidized bed section 9, so that the inside of the visual fluidized bed section 9 forms a lamp box effect under light irradiation.
The lower metal fluidized bed section 12 is internally and horizontally provided with an air distribution plate 13, an air chamber is formed below the air distribution plate 13, an air inlet 11 is formed on the side wall corresponding to the air chamber, the side wall of the lower metal fluidized bed section 12 above the air distribution plate 13 is provided with a discharge opening 14 and a lower pressure measuring hole 17, the height of the discharge opening 14 corresponds to the height of the air distribution plate 13, and the lower metal fluidized bed section is used for discharging glass bead particles in a fluidized bed when changing bed materials; further, the air distribution plate 13 adopts a sintering plate, so that the air flow is uniformly distributed, and glass bead particles serving as bed materials in the fluidized bed can be supported, and the glass bead particles are prevented from leaking downwards.
The lower part of the side wall of the upper metal fluidized bed section 10 is provided with an upper pressure measuring hole 22, the differential pressure transmitter 15 is arranged on a pressure measuring pipe with two ends respectively connected with the lower pressure measuring hole 17 and the upper pressure measuring hole 22 so as to measure the pressure drop of the visual fluidized bed section 9, the side wall of the visual fluidized bed section 9 is also provided with a plurality of pressure measuring holes, the pressure measuring holes are provided with quick connectors 16, the pressure measuring holes are distributed on different heights of the visual fluidized bed section 9, the differential pressure transmitter is connected with the differential pressure transmitter through the quick connectors 16 so as to measure bed pressure drop data corresponding to different heights of the visual fluidized bed section 9, the differential pressure transmitter is connected to an NI board card and then connected to a computer, current signals generated by the differential pressure transmitter are processed and calculated through the NI board card 23, the data are generated on the computer in real time and can be corresponding to images shot by the high-speed camera 8 in real time.
The upper part of the upper metal fluidized bed section 10 is also provided with a feed inlet 18, the feed inlet 18 is used for adding glass bead particles, the top of the upper metal fluidized bed section 10 is also provided with a pressure gauge interface 19 and an exhaust pipe, a first branch of the exhaust pipe is provided with a pressure safety valve through a safety valve interface 21, a second branch of the exhaust pipe is provided with an exhaust port 20 which is controlled to be opened and closed by a valve, and the exhaust port 20 is used for exhausting pressurized gas out of the fluidized bed.
Referring to fig. 2, the lower end of the upper metal fluidized bed section 10 is fixedly installed on the upper flange, the upper end of the lower metal fluidized bed section 12 is fixedly installed on the lower flange, the visual fluidized bed section 9 is fixedly installed between the upper flange and the lower flange, four corners of the upper flange and the lower flange are respectively and limitedly fixed through a long bolt, and the lower metal fluidized bed section 12, the visual fluidized bed section 9 and the upper metal fluidized bed section 10 are fixedly installed together.
The following description of the operation of the experimental set-up of the present utility model is presented in connection with fig. 1:
firstly, a screw compressor 2 is opened, compressed air enters an air storage tank 3, pressurized gas is filtered by an air filter 4 and then enters a cold dryer 5 for cooling and drying, then the flow of the pressurized gas is measured by a flowmeter 6, the pressurized gas enters a thin rectangular pressurized bubbling fluidized bed 1, the pressurized gas firstly enters an air chamber from an air inlet 11, enters a visual fluidized bed section 9 after passing through an air distribution plate 13, and the bed material (glass bead particles) in the pressurized gas is blown up to form a bubbling state; in the visualized fluidized bed section 9, shooting is performed by high-speed shooting, pressurized air is finally discharged through the uppermost exhaust port 20, and when the exhaust pressure is too high, the pressure relief valve opens the auxiliary exhaust. The pressure measuring holes on the side of the visual fluidized bed section 9 are also connected with a differential pressure transmitter through a quick connector 16 to measure pressure drop data of the bed layer, and the two quick connectors 16 can be connected through a pressure measuring pipe, or one quick connector is connected with a lower pressure measuring hole 17 or an upper pressure measuring hole 22 to measure pressure drop data of different bed sections, and the differential pressure transmitter is connected to an NI board card and finally connected to a computer. The current signal generated by the differential pressure transmitter is processed and calculated by the NI board card, so that data can be generated on a computer in real time, the current signal can be immediately corresponding to high-speed shooting, and the reliability of a bubble processing result is enhanced.
While the foregoing description of the embodiments of the present utility model has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the utility model, but rather, it is intended to cover modifications or variations of the equivalent structures or equivalent processes, which may be accomplished by those skilled in the art without undue effort based on the teachings herein, or by direct or indirect application to other related arts, while remaining within the scope of the present utility model.
Claims (7)
1. The cold die experimental device for the pressurized bubbling fluidized bed is characterized by comprising a thin rectangular pressurized bubbling fluidized bed, an air supply system and a monitoring system, wherein the air supply system supplies pressurized air to the thin rectangular pressurized bubbling fluidized bed; the thin rectangular pressurizing bubbling fluidized bed sequentially comprises a lower metal fluidized bed section, a visual fluidized bed section and an upper metal fluidized bed section from bottom to top, wherein the upper metal fluidized bed section and the lower metal fluidized bed section are made of stainless steel materials, the visual fluidized bed section is made of organic glass materials, the thin rectangular pressurizing bubbling fluidized bed is a thin rectangular bed body, the section of the thin rectangular pressurizing bubbling fluidized bed is rectangular, and the length of the short side of the rectangle is not more than 5cm;
one side surface of the visual fluidized bed section perpendicular to the thickness direction is a light-transmitting observation surface, and the other three side surfaces are all arranged to face to a light-reflecting surface reflecting light inside the visual fluidized bed section;
the side wall of the lower metal fluidized bed section is provided with a lower pressure measuring hole, the side wall of the upper metal fluidized bed section is provided with an upper pressure measuring hole, a pressure measuring pipe is connected between the upper pressure measuring hole and the lower pressure measuring hole, and a differential pressure transmitter is arranged on the pressure measuring pipe; the side wall of the visual fluidized bed section is provided with a plurality of layers of pressure measuring holes, and the pressure measuring holes are connected with a pressure measuring pipe and a differential pressure transmitter through quick connectors so as to obtain pressure drop and differential pressure fluctuation signals in different bed height ranges;
the monitoring system comprises a flowmeter, a high-speed camera, a computer, a differential pressure transmitter and an NI board card, wherein the flowmeter is arranged in front of an air inlet of the thin rectangular pressurized bubbling fluidized bed and is used for measuring the flow of pressurized air; the high-speed camera is arranged on one side of the observation surface of the thin rectangular pressurized bubbling fluidized bed; the differential pressure transmitter monitors the interval pressure drop data of the thin rectangular pressurized bubbling fluidized bed, and the NI board card is connected with the differential pressure transmitter and the computer and is used for processing a current signal generated by the differential pressure transmitter and generating data on the computer in real time.
2. The cold die experimental device of the pressurized bubbling fluidized bed according to claim 1, further characterized in that an air distribution plate is horizontally arranged in the lower metal fluidized bed section, an air chamber is formed below the air distribution plate, an air inlet is formed in the side wall corresponding to the air chamber, pressurized air enters the thin rectangular pressurized bubbling fluidized bed through the air inlet, a discharge opening is formed in the side wall, above the air distribution plate, of the lower metal fluidized bed section, the height of the discharge opening corresponds to the height of the air distribution plate, and glass bead particles in the fluidized bed are discharged when the bed material is replaced.
3. The pressurized bubbling fluidized bed cold die experimental device according to claim 1, further characterized in that a feed port is further provided at an upper portion of the upper metal fluidized bed section, the feed port is used for adding glass bead particles, a pressure gauge interface and an exhaust pipe are further provided at a top of the upper metal fluidized bed section, the exhaust pipe is divided into a first branch and a second branch, the first branch is provided with a pressure safety valve through the safety valve interface, the second branch of the exhaust pipe is provided with an exhaust port controlled to be opened and closed by a valve, and the exhaust port is used for exhausting pressurized gas out of the thin rectangular pressurized bubbling fluidized bed.
4. The pressurized bubbling fluidized bed cold die experimental device according to claim 1, further characterized in that the air supply system comprises a screw compressor, an air storage tank, an air filter and a cold dryer which are sequentially connected in series, and an outlet pipeline of the cold dryer is communicated with an air inlet of the thin rectangular pressurized bubbling fluidized bed.
5. The pressurized bubbling fluidized bed cold die experimental apparatus according to claim 1, further characterized in that the other three sides of the non-viewing surface of the visualized fluidized bed section are attached with light reflecting plates.
6. The pressurized bubbling fluidized bed cold die experimental apparatus according to claim 1, further characterized in that the other three sides of the non-viewing surface of the visualized fluidized bed section are coated with a reflective coating or a specular coating.
7. The pressurized bubbling fluidized bed cold die experimental device according to claim 1 or 2, further characterized in that the lower end of the upper metal fluidized bed section is fixedly arranged on the upper flange, the upper end of the lower metal fluidized bed section is fixedly arranged on the lower flange, the visual fluidized bed section is fixedly arranged between the upper flange and the lower flange, and four corners of the upper flange and the lower flange are respectively fixed in a limiting manner through a long bolt, so that the fixed installation of the lower metal fluidized bed section, the visual fluidized bed section and the upper metal fluidized bed section is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210813794.8A CN115178195B (en) | 2022-07-12 | 2022-07-12 | Pressurized bubbling fluidized bed cold die experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210813794.8A CN115178195B (en) | 2022-07-12 | 2022-07-12 | Pressurized bubbling fluidized bed cold die experimental device |
Publications (2)
| Publication Number | Publication Date |
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| CN115178195A CN115178195A (en) | 2022-10-14 |
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