Concentric circle rotary type supergravity bed

Abstract

The invention discloses a concentric circle rotating type supergravity bed which comprises a shell and a rotor arranged in the shell, the rotor comprises an upper fixed disc and a lower rotating disc, the upper fixed disc and the lower rotating disc are each provided with a plurality of concentric baffling rings with different diameters, and the upper baffling rings and the lower baffling rings are mutually nested and distributed in a staggered mode. A heating pipe is arranged on the inner side wall face of each upper baffling ring, protruding parts distributed in an array mode are arranged on the inner side wall face of each lower baffling ring, and liquid materials enter and are introduced into a liquid distributor in the center of the rotor through a liquid inlet pipe and then fall onto the upper baffling rings and the lower baffling rings. The liquid drops or the liquid filaments flow out in a zigzag mode from inside to outside through a baffling channel between the upper baffling ring and the lower baffling ring, in the process, the liquid drops or the liquid filaments collide and splash at the protruding part of the lower baffling ring, fine liquid drops and thin liquid films with continuously updated surfaces are formed, and the gas-liquid contact efficiency is improved. The supergravity bed has the advantages of being compact and reasonable in structure, high in mass transfer efficiency, small in pressure drop, low in power consumption and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of supergravity beds, and in particular relates to a concentric circle rotating supergravity bed. Background Art

[0002] In the industrial production process of biodiesel (fatty acid methyl ester), the raw oil must first be methylated, including esterification and transesterification to obtain crude methyl esters. The methylation process equipment must ensure that the oil and methanol are fully mixed, increase the phase interface of the heterogeneous reaction, and promote the reaction to proceed quickly. Reacting at a higher methanol to oil molar ratio and an excess of methanol can increase the oil conversion rate.

[0003] Existing biodiesel industrial reaction devices mostly use mechanical stirring reactors, and mixing is mainly achieved by stirring paddles. During the stirring process, the liquid is prone to form a small circulation locally, so that the oil and methanol catalyst cannot fully contact and mix, resulting in a slow reaction rate and low efficiency. In addition, the use of a stirring structure has an amplification effect on the reaction, resulting in a decrease in efficiency. The supergravity reactor can effectively improve the above problems. Its principle is to use the centrifugal field to achieve the contact and transfer process between fluids in different phases, which is an enhancement of the "three transfers and one reaction" process in traditional equipment. The gas-liquid mass transfer in the supergravity bed is carried out in the supergravity field. The contact area between the gas and liquid phases is large, and the phase interface can be quickly updated. By utilizing the highly enhanced microscopic mixing process characteristics under the supergravity environment, chemical tower equipment as high as tens of meters can be replaced by a supergravity machine less than two meters high. Therefore, the supergravity rotating bed is known as the "transistor" in chemical equipment. After years of development, the supergravity rotating bed has been widely used in petrochemical, energy, materials, environment, pharmaceutical and other fields.

[0004] Chinese patent CN117085617A discloses a supergravity bed reactor equipped with a high-speed large rotor. This supergravity bed uses the centrifugal force generated by the rotation of the large rotor to disperse the gas-phase reactants into a large number of tiny bubbles in the liquid-phase reactants, greatly increasing the reaction area and performing rapid reactions. The upper plate is stationary, eliminating the need for a dynamic seal between the rotor and the gas phase outlet, reducing the difficulty of manufacturing the equipment; it is also convenient to set a feed port at any position on the upper plate, thereby realizing a single device continuous operation process; at the same time, multiple layers of rotors can be conveniently installed on the shaft in the same housing, increasing the number of theoretical plates of a single device exponentially. However, this supergravity bed also has problems such as difficulty in equipment manufacturing, high energy consumption, and large pressure drop, which limits its application in certain industries. Summary of the invention

[0005] In view of the problems existing in the above background technology, the purpose of the present invention is to provide a concentric rotating supergravity bed with compact and reasonable structure, high mass transfer efficiency, small pressure drop and low power consumption.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A concentric rotating hypergravity bed comprises a shell and a rotor arranged in the shell, wherein the rotor comprises an upper fixed plate and a lower rotating plate, wherein the upper fixed plate and the lower rotating plate are respectively provided with a plurality of concentric baffles of different diameters, namely upper baffles and lower baffles, which are nested with each other and arranged in an alternating manner, wherein the lower rotating plate is connected to a rotating shaft driving the rotation thereof, wherein a heating tube is arranged on the inner wall surface of each upper baffle, a liquid inlet pipe is arranged at the upper end of the middle part of the upper fixed plate, and a liquid distributor communicating with the liquid inlet pipe is arranged at the lower end, and an array of protrusions are arranged on the inner wall surface of the lower baffle. The present invention can achieve liquid dispersion in the rotor through the liquid distributor at the center of the rotor. The liquid material enters through the liquid inlet pipe and is passed into the liquid distributor at the center of the rotor. It is accelerated and thrown out under the action of centrifugal force, and flows out from the inside to the outside through the baffle channel between the upper baffle ring and the lower baffle ring. In this process, droplets or liquid filaments collide and splash at the raised portion of the lower baffle ring, which reduces the thickness of the liquid film on the lower rotating disk, increases the gas flow space, reduces the pressure drop, and at the same time makes the liquid collide with the raised portion to form fine droplets and a thin layer of liquid film that is continuously renewed on the surface. The surface renewal rate of the liquid film and the gas-liquid contact area become larger, thereby improving the gas-liquid contact efficiency.

[0008] Furthermore, the protrusions are in the form of semicircular protrusions, and the protrusions are distributed all over the inner wall surface of the lower baffle ring and in a concentric circle array.

[0009] Furthermore, there is a horizontal overlapping area between the lower end of the upper baffle ring and the upper end of the lower baffle ring.

[0010] Furthermore, the heights of the upper baffles are the same, the heights of the lower baffles are the same, and the heights of the upper baffles and the lower baffles are both smaller than the distance between the upper fixed disk and the lower rotating disk.

[0011] Furthermore, a gas inlet pipe is provided on the side of the shell, a liquid outlet pipe is provided at the bottom of the shell away from the gas inlet pipe, a gas outlet branch pipe is provided at the top center of the shell, and the gas outlet branch pipe is arranged outside the liquid inlet pipe.

[0012] Furthermore, the liquid distributor comprises a liquid distribution pipe, the upper end of which is connected to the liquid inlet pipe, the bottom of the liquid distribution pipe is closed, and a plurality of liquid outlet holes are evenly distributed along the circumference on the side wall of the lower end.

[0013] Furthermore, the rotating shaft is connected to an output shaft of an external motor after passing through the housing, and a mechanical seal is provided at the connection between the rotating shaft and the housing.

[0014] Furthermore, the heating tubes arranged on the inner wall surface of the upper baffle ring include several circles of annular heating tubes arranged from top to bottom, and several vertical heating tubes evenly spaced along the circumference. The vertical heating tubes and the annular heating tubes are welded together and the inner spaces of the two tubes are connected. The resistance wire passes through the first vertical heating tube and enters the first circle of annular heating tubes, and is routed along the inner space of the tube until it reaches the last vertical heating tube of the first circle, and then passes through the last vertical heating tube of the first circle to enter the second circle of annular heating tubes, and so on, until the resistance wire completes all circles of routing and passes through the bottom of the corresponding vertical heating tubes; the two ends of the resistance wire then pass through the upper fixed plate upward along the wall surface of the upper baffle ring and are connected to the power supply.

[0015] Furthermore, the diameters of the vertical heating tube and the annular heating tube are both 3 to 8 mm, and the inner diameters of the vertical heating tube and the annular heating tube are both larger than the diameter of the resistance wire. After the resistance wire is routed in the heating tube, magnesium oxide powder is filled into the heating tube and the port of the vertical heating tube is sealed.

[0016] Furthermore, each of the upper baffle rings or lower baffle rings has a height of 3 to 20 cm and a thickness of 1 to 3 mm; the height of the upper baffle rings or lower baffle rings is 0.5 to 10 cm smaller than the distance between the upper fixed disk and the lower rotating disk.

[0017] Compared with the prior art, the present invention has the following significant advantages:

[0018] 1) The liquid distributor at the center of the rotor can realize the dispersion of liquid in the rotor; the lower baffle ring is arranged vertically on the lower rotating disk, and the inner side of the lower baffle ring is covered with small semicircular protrusions, which reduces the thickness of the liquid film on the lower rotating disk, increases the gas flow space, reduces the pressure drop, and increases the surface renewal rate of the liquid film and the gas-liquid contact area; the upper and lower baffle rings of the rotor have the function of accelerating the liquid, the liquid kinetic energy loss is small, and the power consumption is low.

[0019] 2) The present invention sets a resistance wire in the heating tube and fills it with magnesium oxide powder. On the one hand, the heating tube is arranged on the inner wall surface of the upper baffle ring, making the wall surface of the upper baffle ring uneven, increasing the contact area of ​​the reactants, and on the other hand, heating by the heating tube can also stabilize the temperature of the reaction liquid. In comparison, if the heating tube is heated by introducing a hot fluid, the diameter of the heating tube is relatively large, and the space occupied is large, which is not conducive to the mutual nesting of the upper baffle ring and the lower baffle ring, and greatly increases the resistance of the reaction liquid on the surface of the upper baffle ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the concentric circle rotating supergravity bed of the present invention;

[0021] Figure 2 It is a schematic diagram of the single-layer structure of the upper baffle ring of the present invention;

[0022] Figure 3 It is a distribution diagram of the direction of the resistance wire in the heating tube of the present invention;

[0023] Figure 4 1 is a schematic diagram of the top view of the structure of the lower baffle ring of the present invention;

[0024] Figure 5 It is a partial structural expansion diagram of the lower baffle ring of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the liquid distributor, the gas outlet pipe, and the liquid inlet pipe of the present invention;

[0026] Explanation of the reference numerals: gas outlet pipe 1, liquid inlet pipe 2, lower baffle 3, upper baffle 4, liquid outlet pipe 5, lower rotating disk 6, rotating shaft 7, liquid distributor 8, gas inlet pipe 9, upper fixed disk 10, several bolts 11, upper mechanical seal 12, lower mechanical seal 13, shell 14, heating tube 15, annular heating tube 151, vertical heating tube 152, liquid outlet hole 16, protrusion 17. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described below with reference to specific embodiments, but the protection scope of the present invention is not limited thereto.

[0028] Embodiment 1:

[0029] See also Figure 1 to Figure 6 The present embodiment provides a concentric circle rotating hypergravity bed, comprising a shell 14, a rotor arranged in the shell 14, the rotor comprising an upper fixed plate 10 and a lower rotating plate 6, the upper fixed plate 10 and the lower rotating plate 6 are respectively provided with a plurality of concentric baffles of different diameters, namely, an upper baffle 4 and a lower baffle 3, the upper baffles and the lower baffles are mutually nested and arranged in an interlaced manner, the lower rotating plate 6 is connected to a rotating shaft 7 driving the rotation thereof, the rotating shaft 7 is connected to an output shaft of an external motor after passing through the bottom surface of the shell 14, and a lower mechanical seal 13 is arranged at the connection between the rotating shaft 7 and the shell 14. A liquid inlet pipe 2 is arranged at the upper end of the middle part of the upper fixed plate, and a liquid distributor 8 communicating with the liquid inlet pipe 2 is arranged at the lower end, the liquid distributor 8 comprises a liquid distribution pipe, the upper end of which is connected to the liquid inlet pipe 2, the bottom of the liquid distribution pipe is closed, and a plurality of liquid outlet holes 16 are evenly distributed along the circumference on the side wall of the lower end. A gas inlet pipe 9 is provided on the side of the shell 14, a liquid outlet pipe 5 is provided at the bottom of the shell 14 away from the gas inlet pipe 9, a gas outlet branch pipe 1 is provided at the top center of the shell 14, and the gas outlet branch pipe 1 is provided on the outside of the liquid inlet pipe 2. An upper mechanical seal 12 is provided at the connection between the liquid inlet pipe 2 and the shell 14.

[0030] like Figure 1 and Figure 6 As shown, the liquid distributor 8 described in this embodiment is provided with a plurality of uniform small holes, the height of the opening area is smaller than the height of the lower baffle ring 3, and the number of openings can be increased or decreased according to actual work requirements.

[0031] A gas inlet pipe 9 is provided on the side of the shell 14, a liquid outlet pipe 5 is provided at a position of the bottom of the shell 14 away from the gas inlet pipe 9, a gas outlet main pipe is provided at the top center of the shell, the gas outlet main pipe is connected to the inner cavity of the rotor, and the gas outlet main pipe is arranged on the outside of the liquid inlet pipe 2, and the side of the gas outlet main pipe is connected to the gas outlet branch pipe 1.

[0032] The upper fixed plate 10 is fixed on the housing 14 by a plurality of bolts 11 , and a mechanical seal is provided at the junction of the gas outlet main pipe and the upper fixed plate 10 .

[0033] The upper fixed plate 10 is provided with a plurality of upper baffle rings 4 having different diameters and being concentrically arranged, and the lower rotating plate 6 is provided with a plurality of lower baffle rings 3 having different diameters and being concentrically arranged. The lower baffle rings 3 and the upper baffle rings 4 are arranged in an interlaced and nested manner, and an array of protrusions 17 are arranged on the inner wall surface of the lower baffle ring 3. The protrusions 17 are in a semicircular protruding structure, and the protrusions 17 are distributed all over the inner wall surface of the baffle ring and are distributed in a concentric circle array.

[0034] The upper and lower baffles of this embodiment are arranged in a nested manner, the heights of the upper baffles 4 are the same, the heights of the lower baffles 3 are the same, and the heights of the upper and lower baffles are both less than the spacing between the upper fixed disk and the lower rotating disk. The lower end of the upper baffle 4 and the upper end of the lower baffle 3 have a horizontal overlap area.

[0035] The reactor bed height of the present embodiment is 0.5m, the bed diameter is 0.8m, the shell thickness is 5mm, the upper and lower baffles are both 20cm high and 2mm thick, and the distance between the upper fixed plate and the lower rotating plate is 30cm.

[0036] Comparison Figure 2 and Figure 3 In the present invention, a heating tube 15 is arranged on the inner wall surface of each upper baffle ring 4, including a plurality of circles of annular heating tubes 151 arranged from top to bottom, and a plurality of vertical heating tubes 152 evenly spaced along the circumference. The vertical heating tubes 152 are welded together with the annular heating tubes 151 and the inner spaces of the two tubes are connected. The resistance wire passes through the first vertical heating tube 152 and enters the first circle of annular heating tubes 151, and is routed along the inner space of the tube until it reaches the last vertical heating tube 152 of the first circle. Then, it passes through the last vertical heating tube 152 of the first circle and enters the second circle of annular heating tubes 151, and so on, until the resistance wire completes all circles of routing and passes out from the corresponding vertical heating tubes 152 (see the route of the resistance wire routing). Figure 3The two ends of the resistance wire pass through the upper fixed plate 10 upward along the wall surface of the upper baffle ring 4 and are connected to the power supply.

[0037] The inner diameters of the vertical heating tube 152 and the annular heating tube 151 are both larger than the diameter of the resistance wire. After the resistance wire is routed in the heating tube, magnesium oxide powder is filled into the heating tube, and the port of the vertical heating tube 152 is blocked. The diameters of the vertical heating tube 152 and the annular heating tube 151 are both 6 mm. The vertical heating tube 152 of the present invention is made of high-temperature resistant stainless steel tube, and is heated by the resistance wire in the high-temperature resistant stainless steel tube to control the reaction temperature.

[0038] Comparison Figure 3 The resistance wire is generally routed from top to bottom, and the upper end of the first vertical heating tube 152 of the resistance wire can directly pass through the upper fixed plate 10 upward, so that one end of the resistance wire extends out of the housing 14 and is connected to the power supply. Figure 3 It can be seen that the other end of the resistance wire passes through the lower end of one of the vertical heating tubes, and then the lower end port of the vertical heating tube 152 can be sealed, and a protective tube sleeve is wrapped around the outer surface of the resistance wire. After the protective tube sleeve goes down along the inner side surface of the upper deflector ring 4 to the bottom of the upper deflector ring 4, it bypasses the bottom of the upper deflector ring 4 and fits its outer surface upward through the upper fixed plate 10, so that the other end of the resistance wire extends out of the shell 14 under insulation and is connected to the power supply.

[0039] Working process of this embodiment: after the gas enters the shell 14 from the gas inlet pipe 9, under the action of the pressure difference, the gas will flow from the outermost layer to the center plate by plate along the gap between the upper baffle ring 4 and the lower baffle ring 3, so the movement trajectory of the gas is S-shaped, and finally leaves the supergravity bed from the gas outlet branch pipe 1. The liquid enters the liquid distributor 8 from the liquid inlet pipe 2, and the liquid is accelerated by the liquid distributor 8 and dispersed by the small holes on it, and hits the innermost lower baffle ring 3, and begins to flow toward the outer edge along the tortuous S-shaped channel. In this process, the droplets or liquid filaments collide and splash at the raised portion 17 of the lower baffle 3, forming fine droplets and a liquid film that is constantly renewed on the surface, which is thrown to the upper baffle 4 under the action of centrifugal force to contact the heating tube 15, and then is accelerated to be thrown away from the heating tube 15 of the upper baffle 4 as fine droplets or liquid filaments. Under the action of gravity and centrifugal force, the liquid is accelerated to be thrown away from the upper baffle 4, and moves to the lower baffle 3 of the adjacent second layer, entering the next cycle until leaving the rotor. The liquid leaving the rotor is collected by the shell 14 and discharged from the liquid outlet pipe 5.

[0040] The present invention adopts a rotor structure of "upper fixed plate and lower rotating plate", and the liquid distributor 18 in the center of the rotor can realize the dispersion of liquid in the rotor; the lower baffle ring 3 is vertically arranged on the lower rotating plate 6, and has evenly arranged small semicircular protrusions, which reduces the thickness of the liquid film on the lower rotating plate 6, increases the gas flow space, reduces the pressure drop, and increases the surface renewal rate of the liquid film and the gas-liquid contact area; in addition, the upper and lower baffle rings of the rotor both have the function of accelerating the liquid, the liquid kinetic energy loss is less, and the power consumption is lower.

[0041] When the present invention is used for gas-liquid reaction, the preheated reaction raw gas enters the supergravity bed from the gas inlet pipe 9, and under the action of the pressure difference, it flows from the outer edge of the rotor along the gap between the upper baffle ring 4 of the upper fixed plate 10 and the lower baffle ring 3 of the lower rotating plate 6 in a zigzag manner from the outside to the center plate by plate, contacts with the liquid in countercurrent, and is finally discharged through the gas outlet pipe 1; the reaction raw liquid enters from the liquid inlet pipe 2, directly passes into the liquid distributor 8 in the center of the rotor, is accelerated and thrown out under the action of centrifugal force, hits the innermost baffle ring, and starts to flow from the innermost baffle ring along the zigzag S-shaped channel to the outer edge, contacts with the gas in countercurrent, and performs mass transfer. The liquid leaving the rotor is finally collected by the shell 14 and discharged from the liquid outlet pipe 5.

[0042] For example Figure 1 to Figure 6 The concentric rotating supergravity bed of the structure is used to carry out the esterification reaction of methanol and oleic acid. The specific operation process is as follows:

[0043] The sulfonated carbon solid acid catalyst is dispersed in oleic acid, and the amount of sulfonated carbon solid acid catalyst is 10% of the mass of oleic acid to form a liquid phase reaction slurry. The methanol and oleic acid are fed in a molar ratio of 12:1, and the reaction temperature is controlled at 65°C. The methanol gas preheated at 65°C enters the shell 14 of the supergravity bed from the gas inlet pipe 9, and under the action of the pressure difference, it flows from the outer edge of the rotor along the gap between the upper baffle ring 4 of the upper fixed plate 10 and the lower baffle ring 3 of the lower rotating plate 6, and flows from the outside to the center plate by plate. It contacts with the liquid in countercurrent and is finally discharged through the gas outlet pipe 1.

[0044] The reaction slurry composed of the sulfonated carbon solid acid catalyst and oleic acid is preheated at 65°C and enters the liquid distributor 8 in the center of the rotor through the liquid inlet pipe 2, and then falls on the innermost upper baffle ring 4 and the lower baffle ring 3. At a rotor speed of 1000rpm, it starts to flow toward the outer edge along the tortuous S-shaped channel from the channel between the innermost upper baffle ring 4 and the lower baffle ring 3, and contacts with the gas countercurrent to transfer mass. The liquid leaving the rotor is finally collected by the shell 14 and discharged from the liquid outlet pipe 5. The residence time of the reaction slurry composed of the sulfonated carbon solid acid catalyst and oleic acid on the rotor is 0.2h. When the above experimental process is stably operated for 2h, the yield of the biodiesel collected at the liquid outlet pipe reaches 96.3%.

[0045] Embodiment 2:

[0046] The inner wall of the lower baffle ring is not provided with a semicircular protrusion, and the rest is consistent with Example 1. The experimental results of sampling and analysis after stable operation for 2 hours are: the biodiesel yield is 85.7%.

[0047] Embodiment 3:

[0048] No heating tube is provided inside the upper baffle ring, and the rest is consistent with Example 1. The experimental result of sampling and analysis after stable operation for 2 hours is: the biodiesel yield is 77.8%.

[0049] The above description is only part of the embodiments of the present invention and is not intended to limit the present invention. All equivalent changes and modifications made according to the content of the present invention are within the protection scope of the present invention.

Claims

1. A concentric rotating hypergravity bed, comprising a shell (14), and a rotor arranged in the shell (14), wherein the rotor comprises an upper fixed plate (10) and a lower rotating plate (6), wherein the upper fixed plate (10) and the lower rotating plate (6) are respectively provided with a plurality of concentric baffles of different diameters, namely, an upper baffle (4) and a lower baffle (3), wherein the upper baffles and the lower baffles are mutually nested and arranged in a staggered manner, and wherein the lower rotating plate is connected to a rotating shaft for driving the lower rotating plate to rotate, wherein: A heating tube is arranged on the inner wall surface of each upper baffle ring (4), a liquid inlet pipe (2) is arranged at the upper end of the middle part of the upper fixed plate, and a liquid distributor (8) communicating with the liquid inlet pipe (2) is arranged at the lower end, and an array of protrusions (17) are arranged on the inner wall surface of the lower baffle ring. Liquid material enters through the liquid inlet pipe (2) and is passed into the liquid distributor (8) at the center of the rotor, and then falls onto the upper baffle ring (4) and the lower baffle ring (3), and flows out from the inside to the outside through the baffle channel between the upper baffle ring (4) and the lower baffle ring (3). In this process, liquid droplets or liquid filaments collide and splash at the protrusions (17) of the lower baffle ring (3), forming fine liquid droplets and a thin layer of liquid film that is continuously renewed on the surface, thereby improving the gas-liquid contact efficiency.

2. A concentric circle rotating supergravity bed as claimed in claim 1, characterized in that The raised portion (17) is in the form of a semicircular raised structure, and the raised portion (17) is spread over the inner wall surface of the lower baffle ring and is distributed in a concentric circle array.

3. A concentric circle rotating supergravity bed as claimed in claim 1, characterized in that There is a horizontal overlapping area between the lower end of the upper baffle ring and the upper end of the lower baffle ring.

4. A concentric circle rotating supergravity bed as claimed in claim 1, characterized in that The heights of the upper baffles are the same, the heights of the lower baffles are the same, and the heights of the upper baffles and the lower baffles are both smaller than the distance between the upper fixed disk (10) and the lower rotating disk (6).

5. The concentric circle rotating supergravity bed as claimed in claim 1, characterized in that A gas inlet pipe (9) is provided on the side of the shell (14), a liquid outlet pipe (5) is provided at a position of the bottom of the shell (14) away from the gas inlet pipe (9), and a gas outlet branch pipe (1) is provided at the center of the top of the shell. The gas outlet branch pipe (1) is arranged outside the liquid inlet pipe (2).

6. The concentric circle rotating supergravity bed according to claim 1, characterized in that The liquid distributor (8) comprises a liquid distribution pipe, the upper end of which is connected to the liquid inlet pipe (2), the bottom of the liquid distribution pipe is closed, and a plurality of liquid outlet holes are evenly distributed along the circumference on the side wall of the lower end.

7. The concentric circle rotating supergravity bed according to claim 1, characterized in that The rotating shaft is connected to the output shaft of an external motor after passing through the housing, and a mechanical seal is provided at the connection between the rotating shaft and the housing.

8. The concentric circle rotating hypergravity bed as claimed in claim 1, characterized in that The heating tubes arranged on the inner wall surface of the upper baffle ring (4) include a plurality of circles of annular heating tubes (151) arranged from top to bottom, and a plurality of vertical heating tubes (152) arranged at even intervals along the circumference. The vertical heating tubes (152) and the annular heating tubes (151) are welded together and the inner spaces of the two tubes are connected. The resistance wire passes through the first vertical heating tube (152) and enters the first circle of annular heating tubes (151). It is routed along the inner space of the tube until it reaches the last vertical heating tube (152) of the first circle. Then, it passes through the last vertical heating tube (152) of the first circle and enters the second circle of annular heating tubes (151), and so on, until the resistance wire completes all circles of routing and passes out from the corresponding vertical heating tube (152). The two ends of the resistance wire pass upward along the wall surface of the upper baffle ring (4) and out of the upper fixed plate (10) and are connected to a power source.

9. A concentric circle rotating supergravity bed as claimed in claim 8, characterized in that The diameters of the vertical heating tube (152) and the annular heating tube (151) are both 3 to 8 mm, and the inner diameters of the vertical heating tube (152) and the annular heating tube (151) are both larger than the diameter of the resistance wire. After the resistance wire is routed in the heating tube, magnesium oxide powder is filled into the heating tube, and the port of the vertical heating tube (152) is blocked.

10. The concentric circle rotating supergravity bed according to claim 1, characterized in that The height of each upper baffle ring or lower baffle ring is 3-20 cm, and the thickness is 1-3 mm; the height of each upper baffle ring or lower baffle ring is 0.5-10 cm smaller than the distance between the upper fixed disk and the lower rotating disk.

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