Blanking branch adjusting structure for gas-solid moving bed and gas-solid moving bed

Abstract

The utility model relates to a blanking branch adjusting structure for a gas-solid moving bed and the gas-solid moving bed, the structure comprises a blanking cone and a straight outlet connected with the blanking cone, and the wall surface of the blanking cone and / or the wall surface of the straight outlet adopts a double-layer staggered structure; the double-layer staggered structure is composed of two plates which are arranged inside and outside or two plates which are arranged up and down, and each plate is provided with a plurality of holes; a plurality of adjusting holes in different positions are formed in any one of the two plates, only positioning holes for positioning are formed in the other plate, and the aperture ratio of the double-layer staggered structure can be changed when the adjusting holes and the positioning holes in different positions are fixed. On the basis of an original gas-solid moving bed, a novel blanking branch is used for adjusting a novel structure, so that the flow rate of particles in the moving bed is increased, the speed of the particles is uniformly distributed, the dead zone area of the particles is reduced, and the solid loss is reduced under the condition that the gas flow of a main body is not changed.

Description

Technical Field

[0001] This utility model relates to the field of gas-solid moving bed technology, and in particular to a feeding branch adjustment structure for a gas-solid moving bed and the gas-solid moving bed itself. Background Technology

[0002] A moving bed in gas-solid two-phase flow is called a gas-solid moving bed. Based on the different relative motion directions of the gas and solid, gas-solid moving beds can be divided into cross-flow moving beds, counter-flow moving beds, and co-flow moving beds. Among them, counter-flow moving beds and co-flow moving beds have opposite relative flow trends of the gas and solid phases. However, extensive research has shown that counter-flow moving beds and co-flow moving beds have many commonalities in the characteristics of particle flow.

[0003] The existing gas-solid moving bed uses a cone-shaped closed wall for the feed cone. In actual industrial production, it is still difficult to control the particle flow rate and particle flow dead zone in gas-solid co-current moving beds and gas-solid counter-current moving beds. Therefore, it is necessary to propose a new feed cone structure to achieve flexible control of particle flow rate and reduce particle flow dead zone. Utility Model Content

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a feeding branch adjustment structure and a gas-solid moving bed, which can flexibly control the particle flow rate and reduce the particle flow dead zone.

[0005] The technical solution adopted by this utility model to solve the aforementioned technical problem is:

[0006] This utility model provides a feeding branch adjustment structure for a gas-solid moving bed. The structure includes a feeding cone and a straight outlet connected to the feeding cone. The wall of the feeding cone and / or the wall of the straight outlet adopts a double-layer staggered structure.

[0007] The double-layer misaligned structure consists of two plates arranged inside and outside or two plates arranged above and below, each plate having a number of holes; one of the plates has a number of adjustment holes at different positions, while the other plate has only positioning holes for positioning. When the adjustment holes and positioning holes at different positions are fixed, the opening ratio of the double-layer misaligned structure can be changed.

[0008] Furthermore, the feeding cone is connected to the moving bed body by a thread, and the conical sidewall of the feeding cone is composed of a double-layer staggered structure consisting of the upper feeding cone wall surface 4 and the lower feeding cone wall surface 3.

[0009] The upper discharge cone wall 4 and the lower discharge cone wall 3 are provided with a number of holes 2. The lower discharge cone wall 3 is provided with multiple screw holes 1 for connection, which are adjustment holes. The upper discharge cone wall 4 is provided with only two sets of screw holes for connection, which are positioning holes. When any screw hole on the lower discharge cone wall aligns with the screw hole on the upper discharge cone wall , the two are fixed together by screws. The opening ratio of the discharge cone wall is changed according to the different positions of the fixed screw holes.

[0010] Furthermore, the straight outlet is an outlet surrounded by the straight outlet outer wall surface 5 and the straight outlet inner wall surface 6; the straight outlet outer wall surface 5 and the straight outlet inner wall surface 6 are also provided with holes and screw holes, and the connection method is the same as the upper feeding cone wall surface 4 and the lower feeding cone wall surface 3. The opening ratio of the straight outlet wall surface is changed according to the different positions of the fixed screw holes.

[0011] Furthermore, an auxiliary gas inlet is installed near the wall of the discharge cone and / or the straight outlet.

[0012] This utility model also provides a gas-solid moving bed, which uses the aforementioned feeding branch adjustment structure.

[0013] Furthermore, an internal component is provided inside the moving bed and near the material feeding branch adjustment structure; the internal component is at least one of the following shapes: herringbone, triangle, octagon, cone, or inverted cone.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention increases the particle flow rate and makes the particle velocity distribution uniform by using a new feeding branch adjustment structure on the basis of the original gas-solid moving bed without changing the main air flow rate, thereby reducing the particle dead zone area and reducing solid loss.

[0016] Compared to the original structure, the pressure inside the moving bed with the feed branch adjustment structure is significantly reduced. As the opening ratio of the lower wall increases, the proportion of gas flowing out from the particle outlet decreases, the gas velocity decreases, the pressure gradient decreases, and the bed pressure decreases.

[0017] With the adoption of a feed branch adjustment structure, the particle flow rate in the moving bed is controllable and the particle velocity distribution is more uniform. As the opening ratio of the lower wall changes, its local gas resistance coefficient changes. The smaller the opening ratio, the larger the local gas resistance coefficient. The gas flow resistance at the bottom wall of the feed cone increases, making it easier for gas to flow out from the particle outlet. The pressure drop of the bed, the particle flow rate, and the width of the flow area increase accordingly, and the increase becomes increasingly larger.

[0018] When this structure is scaled up for actual production, it reduces the losses caused by particle flow during the actual production process, resulting in certain economic benefits and promising prospects for industrial application. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of one embodiment of the feeding branch adjustment structure for a gas-solid moving bed according to the present invention.

[0020] Figure 2 This is a schematic diagram of the flow of particles and gas after adjusting the new structure using a feeding branch in one embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the particle flow and gas flow after adjusting the new structure using a feeding branch and adding internal components, and introducing auxiliary gas below (i.e., the white rectangular block below the internal components in the figure) in one embodiment of the present invention.

[0022] Figure 4 To different apparent air velocities u g A comparison of simulated test results showing the change in particle flow rate with the local drag coefficient of the gas.

[0023] Figure 5 This is a comparison of the vertical velocities of particles in a moving bed under different local gas drag coefficients.

[0024] In the diagram, 1: screw hole; 2: hole; 3: lower discharge cone wall; 4: upper discharge cone wall; 5: straight outlet outer wall; 6: straight outlet inner wall. Detailed Implementation

[0025] The present invention will be further explained below with reference to the embodiments and accompanying drawings, but this is not intended to limit the scope of protection of this application.

[0026] The principle of this invention is as follows: Traditional moving beds have a cone-shaped bottom with a closed wall, which limits particle flow control and creates dead zones. Therefore, this application incorporates staggered perforated walls near the cone and straight outlet of the moving bed. This allows the gas to flow out of the moving bed in two paths: gas outlets on both sides of the cone wall at the bottom (points a and b) and gas outlets on both sides of the straight outlet (points c and d). By adjusting the perforation ratio at points a, b, and / or c and d, the gas distribution can be altered, thereby controlling the particle flow rate without affecting the mainstream gas flow.

[0027] Example 1

[0028] This embodiment uses a feeding branch adjustment structure for a gas-solid moving bed, such as... Figure 1As shown, it includes a feeding cone and a straight outlet connected to the feeding cone. The feeding cone is connected to the moving bed body by a thread. The conical sidewall of the feeding cone is composed of a double-layer staggered structure consisting of an upper feeding cone wall surface 4 and a lower feeding cone wall surface 3. The straight outlet is an outlet surrounded by a straight outlet outer wall surface 5 and a straight outlet inner wall surface 6.

[0029] Both the upper and lower feeding cone walls 4 and 3 have a number of holes 2. The lower feeding cone wall 3 also has multiple screw holes 1 for connection (adjustment holes), while the upper feeding cone wall 4 has only two sets of screw holes for connection (positioning holes). When any screw hole on the lower feeding cone wall aligns with a screw hole on the upper feeding cone wall, the two can be fixed together with screws. The degree of misalignment between the two plates can be changed by varying the positions of the screw holes, thereby altering the opening ratio of the feeding cone walls.

[0030] Similarly, holes and screw holes are also provided on the outer wall surface 5 and the inner wall surface 6 of the straight outlet. The connection method is the same as that of the upper discharge cone wall surface 4 and the lower discharge cone wall surface 3. The double-layer staggered structure is used to change the opening ratio of the straight outlet wall surface.

[0031] A number of pores are provided on the walls of both the upper and lower feeding cones.

[0032] The walls of the straight outlet also adopt a double-layer design.

[0033] Example 2

[0034] In this embodiment, an internal component is installed inside the moving bed and near the material feeding branch adjustment structure. Simultaneously, the new branch adjustment structure is integrated with the internal component, and gas is introduced below the internal component to form a new gas channel. Figure 3 As shown, improving the pressure drop and particle flow rate at the particle outlet, and increasing the gas volume will promote particle flow, thus increasing the particle flow rate.

[0035] Example 3

[0036] In this embodiment, the internal components placed in the gas-solid moving bed are at least one of the following shapes: herringbone, triangle, octagon, cone, or inverted cone. Due to the influence of the internal components, the particles in the gas-solid moving bed are forced to undergo "flow around" motion, which expands the actual trajectory of particle flow, effectively reduces the dead area of ​​flow, and results in a more uniform velocity distribution.

[0037] Example 4

[0038] In this embodiment, an auxiliary gas inlet is set near the wall of the feeding cone and / or the straight outlet. A critical gas flow rate value for the auxiliary gas is set. Introducing auxiliary gas within the critical gas flow rate value can effectively promote particle flow, regulate particle flow rate, reduce the dead zone area of ​​particle flow, and increase bed volume. This is mainly due to the shearing effect of the gas on the particles.

[0039] Example 5

[0040] The feeding branch adjustment structure for the gas-solid moving bed in this embodiment includes a feeding cone and a straight outlet connected to the feeding cone. Either wall of the feeding cone and the straight outlet adopts a double-layer staggered structure. The staggered arrangement of the upper and lower or inner and outer plates can change the opening ratio.

[0041] In this embodiment, the upper feeding cone wall 4 is fixed to the lower part of the moving bed. Two rows of screw holes are provided on the upper feeding cone wall. A lower feeding cone wall is provided on the outside of the upper feeding cone wall. Multiple screw holes are provided on the lower feeding cone wall. The screw holes at different positions on the lower feeding cone wall are connected and fixed with the corresponding screw holes on the upper feeding cone wall, which can change the opening ratio of the feeding cone.

[0042] When the porosity of the two layers is 0, the local gas resistance coefficient is ∞. When the porosity of the two layers is 100%, the local gas resistance coefficient is 0. By changing the degree of misalignment between the two layers, the situation of changing the porosity in actual industry can be approximated.

[0043] Figures 4-5 These are simulation test results conducted on a gas-solid co-current moving bed when the feed cone uses a double-layer staggered structure while the straight outlet does not. Compared to the original structure, the pressure inside the moving bed with the feed branch adjustment structure is significantly reduced. This is because, with the new structure, the conical wall at the bottom of the moving bed acts as a gas diversion point. As the orifice ratio increases, k decreases; as k decreases, the proportion of gas flowing out of the particle outlet decreases, the gas velocity decreases, the pressure gradient decreases, and the bed pressure decreases.

[0044] Figure 4 To different apparent air velocities u g The simulation results show the particle flow rate as a function of the local gas drag coefficient, where the local gas drag coefficient k = 0, 1, 10, 100, 1000, 10000, ∞, which were set values ​​during the simulation. As the local gas drag coefficient k increases, the particle flow rate W gradually increases, and the increase becomes increasingly larger. When k increases, both the gas volume and pressure drop through the particle outlet increase, indicating a stronger promoting effect of the gas on particle flow, thus increasing the particle flow rate. Furthermore, the apparent gas velocity u... g As the gas-solid interaction increases, the gas's promoting effect on particle flow is enhanced, and the particle flow rate also increases.

[0045] like Figure 5 The graph shows the vertical velocity distribution of particles in a moving bed under different local gas drag coefficients, where the horizontal axis represents the horizontal position and the vertical axis represents the particle vertical velocity. When the local gas drag coefficient k is low, less than 1000, the vertical velocity distribution and flow region width remain almost unchanged due to the small changes in the gas flow rate, pressure drop, and particle flow rate at the particle outlet. As k increases further, the gas flow rate, pressure drop, and particle flow rate at the particle outlet increase significantly, enhancing the effective downward driving force on the particle layer and significantly increasing the flow region width. Furthermore, due to the continuous mixing of particles from both sides above the particle outlet, the vertical velocity above the particle outlet tends to decrease.

[0046] All standard parts used in this utility model can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art, and will not be described in detail here. The contents not described in detail in this specification are all prior art known to those skilled in the art.

[0047] In the description of this utility model, "multiple" or "several quantities" means two or more, unless otherwise explicitly specified.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] In the description of this specification, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0050] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0052] Any aspects not covered in this utility model are applicable to the prior art.

Claims

1. A structure for regulating the flow of solids in a solids movement branch of a gas-solids moving bed, characterized in that, The structure comprises a tapering down feeder and a straight outlet connected to the tapering down feeder, the wall surface of the tapering down feeder and / or the wall surface of the straight outlet adopts a double-layer staggered structure; The double-layer staggered structure is composed of two plates arranged inside and outside or two plates arranged above and below, each plate is provided with a plurality of apertures, and each plate is provided with a plurality of adjusting holes at different positions, and the other plate is provided with only positioning holes for positioning, and the adjusting holes at different positions and the positioning holes are fixed to change the aperture ratio of the double-layer staggered structure.

2. The blanking branch adjusting structure according to claim 1, characterized in that, The tapering down feeder is connected to the main body of the moving bed through threads, the tapering side wall of the tapering down feeder is composed of a double-layer staggered structure composed of an upper tapering down feeder wall surface and a lower tapering down feeder wall surface, The upper tapering down feeder wall surface and the lower tapering down feeder wall surface are provided with a plurality of apertures, a plurality of screw holes for connection are arranged on the lower tapering down feeder wall surface, which are adjusting holes, only two groups of screw holes for connection are arranged on the upper tapering down feeder wall surface, which are positioning holes, any screw hole on the lower tapering down feeder wall surface is aligned with a screw hole on the upper tapering down feeder wall surface, and the two are fixed together through a screw, and the aperture ratio of the tapering down feeder wall surface is changed according to the different positions of the fixed screw holes.

3. The blanking branch adjusting structure according to claim 2, characterized in that, The straight outlet is surrounded by the outer wall surface of the straight outlet and the inner wall surface of the straight outlet; apertures and screw holes are also arranged on the outer wall surface of the straight outlet and the inner wall surface of the straight outlet, the connection mode is the same as that of the upper tapering down feeder wall surface and the lower tapering down feeder wall surface, and the aperture ratio of the straight outlet wall surface is changed according to the different positions of the fixed screw holes.

4. The material flow branch regulating structure according to claim 1, characterized in that, An auxiliary gas inlet is arranged near the tapering down feeder wall surface and / or the straight outlet.

5. A gas-solids moving bed characterized by, The gas-solid moving bed uses the down feeder branch regulation structure according to any one of claims 1-4.

6. The gas-solids moving bed according to claim 5, wherein, An inner member is arranged in the moving bed and near the down feeder branch regulation structure; the inner member is at least one of a chevron shape, a triangular shape, an octagonal shape, a tapering shape or an inverted tapering shape. An inner member is arranged in the moving bed and near the down feeder branch regulation structure; the inner member is at least one of a chevron shape, a triangular shape, an octagonal shape, a tapering shape or an inverted tapering shape.

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