A device and method for adjusting the concentration distribution of solid phase medium in gas-solid two-phase flow

Abstract

The application provides a device and method for adjusting the distribution of solid-phase medium concentration in gas-solid two-phase flow. The adjusting device comprises a distribution cone, an input port of the distribution cone being connected with a flow equalizing component. Medium flow comprising gas-solid two-phase flow flows from the input port to an outlet top plate of the distribution cone after passing through the flow equalizing component. A plurality of outlet branch pipes are distributed outside the outlet top plate and are in communication with the distribution cone. The adjusting device further comprises a plurality of adjusting clamping grooves arranged on the outer sidewall of the distribution cone and in communication with the distribution cone, the adjusting clamping grooves corresponding to the outlet branch pipes one by one. An adjusting member is arranged on the adjusting clamping groove, and an airflow regulating member is arranged in the adjusting member. The airflow regulating member is adjusted by the adjusting member and rotates relative to the adjusting clamping groove, so that part of the medium flow is deflected to a position away from the corresponding outlet branch pipe. The application can effectively distribute and adjust the solid-phase medium without affecting the distribution of gas-phase medium.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medium concentration distribution, in particular to a device and method for adjusting the concentration distribution of solid-phase medium in gas-solid two-phase flow. BACKGROUND

[0002] The problem of adjusting the concentration distribution of solid-phase medium in gas-solid two-phase flow has been a historical problem in this field. Since the gas medium and the solid-phase medium in the gas-solid two-phase flow have both commonalities and individualities in terms of physical properties and flow characteristics, how to realize the separate distribution and adjustment of the solid-phase medium in the gas-solid two-phase flow without affecting the gas medium is the most core difficulty in solving this problem. For example, modern large-capacity coal-fired power plant boilers generally adopt a direct-fired pulverizing system. The uniformity of the coal powder concentration distribution in the coal powder pipe at the outlet of the coal pulverizer plays a crucial role in the safety, stability and economy of the boiler. Especially under the background of deep peak regulation of thermal power units, adjusting the uniformity of the coal powder concentration distribution in the coal powder pipe at the outlet of the coal pulverizer becomes more important. The adjustment of the coal powder concentration distribution in the coal powder pipe at the outlet of the coal pulverizer is the most typical problem of adjusting the concentration distribution of solid-phase medium in gas-solid two-phase flow. The uniformity of the concentration distribution of solid-phase medium in some typical pneumatic ash conveying systems and pneumatic particle conveying processes is also a necessary condition for ensuring the safe, stable and economic operation of the system. Therefore, how to effectively distribute and adjust the solid-phase medium without affecting the distribution of the gas medium is a technical problem that needs to be solved by technical personnel. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art to some extent.

[0004] To this end, the present application aims to provide a device and method for adjusting the concentration distribution of solid-phase medium in gas-solid two-phase flow. The Venturi flow-distribution element and the flow-distribution plate element are continuously arranged to regulate the concentration distribution of the gas medium and the solid-phase medium in the input gas-solid two-phase medium flow to be relatively uniform, and to eliminate the radial distribution velocity and the circumferential velocity of the medium flow in the radial direction at the same time. The distribution cone adopts a diffusion cone structure to further evenly distribute the gas-solid two-phase medium. In addition, the airflow regulating element is a special intermittent guide groove structure, and the guide groove side plate adopts a special obtuse angle or right-angled triangle design to stably change the flow direction of a part of the gas-solid two-phase medium entering the corresponding outlet branch pipe, so that the gas-solid two-phase medium is far away from the corresponding outlet branch pipe, thereby reducing the flow of the solid-phase medium entering the corresponding outlet branch pipe. By using the method of regulating the flow by using a multi-stage flow-coupling distribution and adjustment assembly, the concentration distribution of the solid-phase medium in the gas-solid two-phase flow is effectively adjusted.

[0005] To achieve the above-mentioned purpose, the present application provides a device for adjusting the concentration distribution of solid-phase medium in gas-solid two-phase flow, comprising

[0006] A distribution cone, the inlet of which is connected to a flow equalization assembly, wherein a gas-solid two-phase medium flows through the flow equalization assembly and then flows from the inlet of the distribution cone to the outlet top plate; wherein multiple outlet branch pipes are distributed on the outside of the outlet top plate and communicate with the distribution cone; and

[0007] The distribution adjustment assembly includes a plurality of adjustment slots disposed on the outer wall of the distribution cone and communicating with the distribution cone, wherein each adjustment slot corresponds to one of the outlet branch pipes; an adjustment element is disposed on the adjustment slot, and an airflow adjustment control element is disposed inside the adjustment slot; the airflow adjustment control element is adjusted by the adjustment element and rotates relative to the adjustment slot, so that a portion of the medium flows away from the position corresponding to the outlet branch pipe.

[0008] In some embodiments, the cross-sectional area of ​​the dispensing cone flowing from its inlet to the outlet top plate increases sequentially.

[0009] In some embodiments, the outlet branch pipe is circumferentially and evenly arranged on the outlet top plate.

[0010] In some embodiments, the airflow adjustment control is connected to the adjustment member, and the rotation of the adjustment member drives the airflow adjustment control to rotate; the airflow adjustment control includes a plurality of guide slot plates arranged along the length direction of the adjustment slot; wherein adjacent guide slot side plates are spaced apart by a flow gap for medium to flow through.

[0011] In some embodiments, the guide plate is composed of two guide side plates arranged opposite to each other and spaced apart by a guide groove distance, and the guide side plates are obtuse triangles or right triangles. At the same time, a base plate is connected between the guide side plates, so that when the guide plate is inserted into the distribution cone, part of the medium flow enters the guide groove and deflects away from the position corresponding to the outlet branch pipe.

[0012] In some embodiments, the width of the guide groove is equal to the flow gap.

[0013] In some embodiments, the length and width of the adjustment slot are adapted to the airflow control unit, and the height of the adjustment slot is 2 / 3 to 1 times that of the airflow control unit.

[0014] In some embodiments, the base plate is parallel to the side of the adjusting slot away from the distributing cone, and an inspection flange and an anti-clogging purging flange are provided on the side of the adjusting slot away from the distributing cone.

[0015] In some embodiments, the adjusting member comprises an adjusting handle, a scale disc, an adjusting shaft and a sealing sleeve; wherein the adjusting shaft is connected with the adjusting handle at one end of the adjusting slot; the other end of the adjusting shaft extends into the guide slot and is connected with the guide slot side plate; the adjusting handle slides along the scale disc to record the rotation angle of the adjusting shaft; the sealing sleeve is sleeved on the adjusting shaft to seal the adjusting slot.

[0016] In some embodiments, a striking cone is arranged in the middle of the outlet top plate in the distribution cone for uniform flow of the medium flow at the outlet top plate; wherein the striking cone keeps a safe distance from the airflow control during rotation of the airflow control.

[0017] In some embodiments, the uniform flow assembly comprises a Venturi uniform flow element and a uniform flow plate element; wherein the medium flow passes through the Venturi uniform flow element and the uniform flow plate element in sequence for uniform flow before entering the distribution cone.

[0018] In some embodiments, the uniform flow plate element comprises a plurality of uniform flow plates arranged uniformly in the circumferential direction for further uniform distribution and desymmetrization of the passing medium flow.

[0019] In some embodiments, the application further provides a method for adjusting the distribution of the solid-phase medium concentration in a gas-solid two-phase flow, which utilizes the adjusting device of any of the above embodiments to adjust the distribution of the solid-phase medium concentration in a gas-solid two-phase flow, comprising

[0020] The adjusting member on each adjusting slot is used to adjust the angle of the airflow control into the distribution cone, so that part of the medium passing through the airflow control is deflected away from the corresponding outlet branch; at the same time, the gas-phase medium in the medium flow is appropriately supplemented from other areas through the resistance characteristics between the outlet branches, so as to finally realize the stability of the gas-phase medium distribution characteristics in each outlet branch.

[0021] The additional aspects and advantages of the application will be partially given in the following description, partially become obvious from the following description, or be known by the practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and / or additional aspects and advantages of the application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0023] Figure 1 FIG. 1 is a structural schematic diagram of an adjusting device for the distribution of the solid-phase medium concentration in a gas-solid two-phase flow according to an embodiment of the application;

[0024] Figure 2 FIG. 2 is a structural schematic diagram of an adjusting device for the distribution of the solid-phase medium concentration in a gas-solid two-phase flow according to another embodiment of the application;

[0025] Figure 3 is a structural schematic diagram of a solid-phase medium concentration distribution adjusting device in a gas-solid two-phase flow according to an embodiment of the present application;

[0026] Figure 4 is a structural schematic diagram of a solid-phase medium concentration distribution adjusting device in a gas-solid two-phase flow according to an embodiment of the present application;

[0027] Figure 5 is a structural schematic diagram of a gas flow regulating element according to an embodiment of the present application;

[0028] Figure 6 is a measured curve diagram of the relationship between the angle of a gas flow regulating element and the solid-phase medium flow in the corresponding outlet branch according to an embodiment of the present application.

[0029] In the diagram, 1 is an inlet flange, 2 is a Venturi flow equalizing element, 3 is a flow equalizing plate element, 4 is a flow equalizing plate, 5 is a blow-sweeping flange for preventing blockage, 6 is an adjusting slot, 7 is a maintenance flange, 8 is a distribution cone, 9 is an outlet branch, 10 is an impact cone, 11 is an adjusting handle, 12 is a dial, 13 is an adjusting shaft, 14 is a sealing sleeve, 15 is a gas flow regulating element, 151 is a guide groove plate, 152 is a flow gap, 153 is a guide groove, 154 is a guide groove side plate, and 155 is a bottom plate. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below are examples for explaining the present application and should not be construed as limiting the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0031] Reference is made to Figure 1 To achieve the above-mentioned purpose, the solid-phase medium concentration distribution adjusting device in a gas-solid two-phase flow according to the present application comprises a distribution cone 8 and a distribution adjusting assembly. The input port of the distribution cone 8 is connected with a flow equalizing assembly. The medium flow including a gas-solid two-phase flow passes through the flow equalizing assembly and then flows from the input port of the distribution cone 8 to the outlet top plate. The outlet branch 9 is a plurality of branches and is distributed on the outside of the outlet top plate and is in communication with the distribution cone 8.

[0032] The distribution cone 8 is a profile with a certain rigidity and is a hollow inverted cone structure including an input port and an outlet top plate arranged opposite to the input port. The outlet branch 9 is a plurality of branches and is uniformly distributed on the outlet top plate and is located outside the distribution cone 8. The outlet branch 9 is in communication with the inside of the distribution cone 8 for outputting the input medium flow in the distribution cone 8.Figure 1 As shown, the distribution cone 8 is a hollow inverted conical structure. Taking the case where the height direction of the distribution cone 8 is consistent with the up-down direction, the input port of the distribution cone 8 is located at the lower side, and the outlet top plate is located at the upper side. The input port of the distribution cone 8 is connected with the flow equalizing assembly, and the flow equalizing assembly is used to flow the medium flow including gas-solid two-phase flow through the flow equalizing assembly to the outlet top plate of the distribution cone 8, and then the medium flow is discharged from the distribution cone 8 through the multiple outlet branch pipes 9 arranged on the outlet top plate.

[0033] In this embodiment, the medium flow including gas-solid two-phase flow can be understood as the medium flow including gas-phase medium and solid-phase medium, wherein the gas-phase medium entrains the solid-phase medium to sequentially pass through the flow equalizing assembly and the distribution cone 8. Since the cross-sectional area of the distribution cone 8 from the input port to the outlet top plate is gradually increased to form a diffusion cone structure, the distribution cone 8 can further uniformly distribute the medium flow, and then the medium flow is uniformly discharged through the outlet branch pipes 9 arranged on the outlet top plate. In some embodiments, the outlet branch pipes 9 are circumferentially and uniformly arranged on the outlet top plate, so that the flow of the medium flow in each outlet branch pipe 9 is the same.

[0034] The distribution adjustment assembly in this embodiment includes multiple adjustment clamping grooves 6 arranged on the outer sidewall of the distribution cone 8 and in communication with the distribution cone 8, wherein the adjustment clamping grooves 6 correspond to the outlet branch pipes 9 one by one. An adjustment member is arranged on the adjustment clamping groove 6, and an airflow regulating member 15 is arranged inside the adjustment clamping groove 6. The airflow regulating member 15 is adjusted by the adjustment member and rotates relative to the adjustment clamping groove 6, so that part of the medium flow is deflected to a position away from the corresponding outlet branch pipe 9.

[0035] The distribution adjustment assembly includes multiple adjustment clamping grooves 6, wherein the adjustment clamping grooves 6 are convex groove structures, are fixed on the outer sidewall of the distribution cone 8, and are open on one side and in communication with the distribution cone 8. In this embodiment, the number and arrangement position of the adjustment clamping grooves 6 correspond to the outlet branch pipes 9 one by one, that is, under the condition that the medium flow is not disturbed by the airflow regulating member in the adjustment clamping groove 6, the medium flow is uniformly distributed into the multiple outlet branch pipes 9. The adjustment clamping groove 6 has a certain accommodation space, which is used to accommodate the airflow regulating member 15. The airflow regulating member 15 is connected with the adjustment member arranged on the adjustment clamping groove 6, and is controlled by the adjustment member to rotate relative to the adjustment clamping groove 6 in the adjustment clamping groove 6, so that part of the medium flow is deflected to a position away from the corresponding outlet branch pipe 9.

[0036] It can be understood that when each airflow control member 15 is in its original position, the main body or the entirety of the airflow control member 15 is in the adjustment card slot 6 and does not participate in the adjustment of the medium flow in the distribution cone 8, and the medium flow is finally evenly distributed to the multiple outlet branch pipes 9 after being homogenized by the distribution cone 8. With the adjustment of the adjustment member, the airflow control member 15 can rotate in the adjustment card slot 6 relative to the adjustment card slot 6, at this time, the airflow control member 15 gradually penetrates into the distribution cone 8, and the greater the adjustment range of the adjustment member, the greater the angle of the airflow control member 15 penetrating into the distribution cone 8. When the airflow control member 15 penetrates into the distribution cone 8 by a certain angle, the airflow control member 15 can change the flow direction of a part of the medium flow and deflect to a position away from the outlet branch pipe 9 corresponding to the adjustment card slot 6. The greater the adjustment angle of the airflow control member 15 penetrating into the distribution cone 8, the more the flow of the medium flow to be adjusted, and the farther the position away from the corresponding branch pipe.

[0037] Therefore, in the embodiment, the airflow control member 15 stably changes the flow direction of a part of the medium flow entering the corresponding outlet branch pipe 9, so that it is away from the corresponding branch pipe, and finally the solid-phase medium flow of the corresponding outlet branch pipe 9 can be reduced. Through the cooperation of all airflow control members 15, the solid-phase medium flow of each outlet branch pipe 9 can be controlled and adjusted. Since the gas-phase medium distribution characteristics mainly depend on the resistance characteristics along the way, as long as the resistance characteristics in each outlet branch pipe 9 are certain, the flow of the gas-phase medium flowing into each outlet branch pipe 9 is basically consistent, so while the airflow control member 15 stably changes the flow direction of a part of the medium flow entering the corresponding outlet branch pipe 9, so that it is away from the corresponding outlet branch pipe 9, the gas-phase medium will be supplemented from other areas through the resistance characteristics between the outlet branch pipes 9, and finally the stability of the gas-phase medium distribution characteristics in each outlet branch pipe 9 will be maintained. Since the solid-phase medium has large momentum, the amount of solid-phase medium supplemented back in the gas-phase medium supplement and balance process is much lower than the flow of the airflow control member 15 away from the outlet branch pipe 9, and the difference between the two is the effective adjustment amount of the airflow control member 15, and finally the effective adjustment of the solid-phase medium concentration distribution characteristics in the medium flow is realized.

[0038] In some embodiments, the airflow control member 15 is connected with the adjustment member, and rotates under the rotation of the adjustment member; the airflow control member 15 includes multiple guide groove plates 151 arranged along the length direction of the adjustment card slot 6; and a flow gap 152 for the medium flow to pass through is arranged between the adjacent guide groove side plates 154.

[0039] The airflow regulating member 15 comprises a plurality of guide groove plates 151, wherein the guide groove plates 151 are arranged along the length direction of the adjusting card slot 6, and the adjacent guide groove side plates 154 are spaced apart to form flow gaps 152 for the medium flow to pass through. In the embodiment, the plurality of guide groove plates 151 are respectively fixedly connected with the adjusting member, and the guide groove plates 151 can be rotated by the rotation of the adjusting member, so as to realize the adjustment of the adjusting member to the guide groove plates 151. In the embodiment, part of the medium flow passes through the flow gaps 152 and enters the corresponding outlet branch pipe 9; and the remaining medium flow passes through the intervention of the guide groove plates 151 and is far away from the corresponding outlet branch pipe 9. That is, each adjusting card slot 6 cooperates with the airflow regulating member 15 arranged therein to independently adjust the flow of the solid-phase medium in the corresponding outlet branch pipe 9. The adjusting card slot 6 mainly functions to cover the airflow regulating member 15, and thus the height, width and depth dimensions of the adjusting card slot 6 depend on the outer shape structure of the airflow regulating member 15. The length and width of the adjusting card slot 6 are slightly greater than the length and width of the airflow regulating member 15. The height of the adjusting card slot 6 is 2 / 3-1 times the height of the airflow regulating member 15, so as to facilitate the rotation of the airflow regulating member 15 in the adjusting card slot 6 towards the distribution cone 8.

[0040] As shown in the example Figure 5 As shown in the example, each guide groove plate 151 comprises two guide groove side plates 154 arranged thereon, wherein the guide groove side plates 154 are arranged in parallel and are spaced apart by a certain distance in the length direction of the adjusting card slot 6, and the distance is the width of the guide groove 153, which is equal to the width of the flow gap 152. The guide groove side plates 154 are obtuse-angled or right-angled triangular, which ensures that the medium flow entering the guide groove 153 flows stably along the direction of the guide groove 153 and has a stable flow angle and momentum at the outlet of the guide groove 153. The two guide groove side plates 154 in the same guide groove plate 151 are completely the same. The specific structure of the guide groove side plate 154 needs to be specially designed according to the diameter of the outlet branch pipe 9, the width of the guide groove 153, the distribution cone 8, the characteristics of the medium flow and other parameters. The obtuse angle or right angle of each guide groove side plate 154 is the connection point of the guide groove side plate 154 and the adjusting member. In some embodiments, the adjusting member comprises an adjusting handle 11, a scale disc 12, an adjusting shaft 13 and a sealing sleeve 14. The adjusting shaft 13 crosses the two sides of the adjusting card slot 6 and is movably connected with the adjusting card slot 6, that is, the adjusting shaft 13 passes through the adjusting card slot 6 and the two ends thereof are exposed outside the two sides of the adjusting card slot 6 and can rotate relative to the adjusting card slot 6. The guide groove side plate 154 in the adjusting card slot 6 is fixedly connected with the adjusting shaft 13 perpendicularly. The adjusting handle 11 connected with the adjusting shaft 13 is arranged at one end of the adjusting shaft 13, and the adjusting handle 11 can slide along the scale disc 12 to record the rotation angle of the adjusting shaft 13. The sealing sleeve 14 is sleeved on the adjusting shaft 13 to seal the adjusting card slot 6 and prevent the medium flow in the distribution cone 8 from leaking.

[0041] Meanwhile, in this embodiment, the two guide side plates 154 facing the adjustment slot 6 are connected by a base plate 155. That is, in the initial state of the airflow control 15, the base plate 155 and the side of the adjustment slot 6 away from the guide side plate 154 are set parallel. In this embodiment, the airflow control 15 has a special intermittent guide channel structure. Each guide channel 153 has the same width. The number of guide channels 153 depends on the diameter of the outlet branch pipe 9 and the width of the guide channel 153. This allows some of the medium flow to enter the guide channel 153 when the guide plate 151 penetrates into the distribution cone 8. Ultimately, because it touches the base plate 155, it cannot flow to the outlet branch pipe 9 corresponding to the adjustment slot 6, but instead deflects to a position away from the corresponding outlet branch pipe 9. Therefore, in this embodiment, the airflow control 15, the adjustment handle 11, the dial 12, the adjustment shaft 13, and the sealing sleeve 14 constitute a complete adjustment system, with the adjustment slot 6 serving as the outer shell of this adjustment system.

[0042] In some embodiments, the base plate 155 is parallel to the side of the adjusting slot 6 away from the distributing cone 8, and an inspection flange 7 and an anti-clogging purging flange 5 are provided on the side of the adjusting slot 6 away from the distributing cone 8.

[0043] The regulating slot 6 is also equipped with a maintenance flange 7 and an anti-clogging purging flange 5. For example, the base plate 155 is parallel to the side of the regulating slot 6 away from the distribution cone 8, i.e., parallel to the side of the regulating slot 6 where the maintenance flange 7 is located. In this embodiment, the maintenance flange 7 and the anti-clogging purging flange 5 are respectively installed on the outer surface of the regulating slot 6 for daily anti-clogging purging and maintenance. Furthermore, all surfaces, including the guide side plate 154 and the base plate 155, are treated with anti-wear material to increase the service life of the airflow regulating control 15 and prevent wear.

[0044] In some embodiments, an impact cone 10 is provided in the middle of the outlet top plate inside the distribution cone 8 to equalize the flow of the medium located at the outlet top plate, wherein the impact cone 10 and the airflow control 15 always maintain a safe distance during the rotation of the airflow control 15.

[0045] Among them, such as Figure 2 As shown, the impact cone 10 is located in the middle of the outlet top plate within the distribution cone 8. Its main function is to evenly distribute the medium flow impacting the outlet top plate along the circumferential direction. The height and bottom diameter of the impact cone 10 depend on the arrangement of the outlet branch pipe 9 and the diameter of the flow equalization component. The impact cone 10 also distributes the medium flow at the outlet top plate to a certain extent. During the rotation of the airflow regulating control 15, the impact cone 10 and the airflow regulating control 15 always maintain a safe distance. That is, the design of the guide side plate 154 must also consider that it should not come into contact with the impact cone 10 during adjustment, and there should be no interference between them within the adjustable range.

[0046] In some embodiments, the flow uniformizing assembly comprises a Venturi flow uniformizing member 2 and a flow uniformizing plate member 3; wherein the medium flow passes through the Venturi flow uniformizing member 2 and the flow uniformizing plate member 3 in sequence for flow uniformization and then enters the distribution cone 8.

[0047] As shown in Figure 3 and Figure 4 The flow uniformizing assembly comprises a Venturi flow uniformizing member 2 and a flow uniformizing plate member 3, and in this embodiment, the medium flow first flows through the inlet flange 1 into the Venturi flow uniformizing member 2, wherein the Venturi flow uniformizing member 2 adopts a Venturi structure to form a process of mixing first and then dispersing for the incoming flow, so that the gas-solid two-phase flow medium is more uniformly distributed along the cross-sectional direction; and the medium flow output by the Venturi flow uniformizing member 2 enters the flow uniformizing plate member 3, wherein the flow uniformizing plate member 3 comprises a plurality of flow uniformizing plates 4 arranged uniformly in the circumferential direction, which further uniformly divide and despin the passing medium flow.

[0048] For example, the flow uniformizing plate member 3 comprises a plurality of flow uniformizing plates 4 arranged uniformly in the circumferential direction, and the flow uniformizing plates 4 are vertically arranged in the up-down direction, and the number and length thereof depend on the length and inner diameter of the flow uniformizing plate member 3. Generally, 20-50 plates are arranged, and the length is generally 0.5-2 times the diameter of the flow uniformizing plate member 3 to further uniformly divide and despin the incoming flow. Therefore, the functions of the Venturi flow uniformizing member 2 and the flow uniformizing plate member 3 are to uniformly divide and despin the gas-solid two-phase flow medium, so as to make the gas-solid two-phase flow medium entering the distribution cone 8 as uniformly distributed as possible along the cross-sectional direction and as stable as possible in flow.

[0049] In some embodiments, the application further proposes a method for adjusting the concentration distribution of solid-phase medium in a gas-solid two-phase flow, which utilizes the adjusting device in any of the above embodiments to adjust the concentration distribution of solid-phase medium in a gas-solid two-phase flow, comprising

[0050] By utilizing the adjusting member on each adjusting slot 6, the angle of the airflow control member 15 deep into the distribution cone 8 is adjusted, so that part of the medium passing through the airflow control member 15 is deflected away from the corresponding outlet branch pipe 9; at the same time, the gas-phase medium in the medium flow is appropriately supplemented from other areas through the resistance characteristics between the outlet branch pipes 9, so as to finally realize the stability of the gas-phase medium distribution characteristics in each outlet branch pipe 9.

[0051] This embodiment employs a method of regulating and guiding the flow using a multi-stage flow equalization coupling airflow control 15 along with a Venturi flow equalization component 2 and a flow equalization plate 3. This effectively adjusts the concentration distribution characteristics of the solid phase medium in the gas-solid two-phase flow. The Venturi flow equalization component 2 regulates the concentration distribution characteristics of the gas and solid phase medium in the inlet medium flow to a relatively uniform level. The flow equalization plate 3 further equalizes the concentration distribution characteristics of the gas and solid phase medium in the medium flow while simultaneously eliminating swirl, thus eliminating the radial velocity splitting and circumferential velocity of the airflow. After these two stages of flow equalization, the airflow enters the distribution cone 8 with a basically uniform and stable flow. The distribution cone 8 itself adopts a diffusion cone structure, further equalizing the gas-solid two-phase flow medium. The impact cone 10 also contributes to the equalization of the gas-solid two-phase flow medium to some extent. The airflow control 15 is a special intermittent guide channel structure. The guide channel side plate 154 adopts a specially designed obtuse or right-angled triangle, which stably changes the flow direction of a portion of the gas-solid two-phase flow medium entering the corresponding outlet branch pipe 9, making it move away from the corresponding outlet branch pipe 9. Ultimately, it can reduce the flow rate of the solid medium entering the outlet branch pipe 9. Through the cooperation of all the airflow control 15, the flow rate of the solid medium in each outlet branch pipe 9 can be controlled and adjusted.

[0052] The method proposed in this application was actually installed and its performance tested at the outlet of a double-inlet, double-outlet ball mill. The outlet of the double-inlet, double-outlet ball mill has a three-part structure, and the internal medium is a primary air-powder gas-solid two-phase flow. This device adjusts the coal powder concentration distribution characteristics in the primary air-powder of each powder pipe at the mill outlet. The measured curves showing the correspondence between the angle of the airflow control valve and the flow rate of the solid medium in the corresponding outlet branch pipe are shown in the figure. Figure 6 As shown. Specifically: when the angle of the airflow regulator is below 10°, the flow rate of the solid medium in the corresponding outlet branch pipe remains constant; when the angle of the airflow regulator is adjusted within the range of 10°-50°, the flow rate of the solid medium in the corresponding outlet branch pipe decreases as the angle of the airflow regulator increases, and the larger the angle, the greater the decrease in the flow rate of the solid medium in the corresponding outlet branch pipe; when the angle of the airflow regulator is greater than 50°, the flow rate of the solid medium in the corresponding outlet branch pipe remains constant as the angle of the airflow regulator increases. Figure 6 Only one type of actual test effect curve of this application is provided. This application can be applied to various types of solid medium concentration distribution and adjustment systems in multi-phase gas-solid two-phase flow. Different design structures will result in different measured curves of the relationship between the angle of the airflow control and the corresponding solid medium flow rate in the pipe, but the general trend of all measured curves is basically the same.

[0053] It should be noted that in the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0054] Any procedural or methodological descriptions in flow charts or otherwise described herein can be understood to represent modules, segments, or portions of code that include executable instructions for implementing the specified logical function or process(es), and the scope of preferred embodiments of the present application includes additional implementations that can not perform the functions in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order, as will be understood by those skilled in the art to which embodiments of the present application pertain.

[0055] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any of at least one embodiment or example.

[0056] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements, and variations to the above-described embodiments within the scope of the present application.

Claims

1. A device for adjusting the concentration distribution of a solid phase medium in a gas-solid two-phase flow, characterized by, The distribution cone has an input port connected with the flow equalizing component, and the medium flow including gas-solid two-phase flow passes through the flow equalizing component and then flows from the input port to the outlet top plate of the distribution cone. The outlet branch pipes are multiple and are distributed outside the outlet top plate and are communicated with the distribution cone. The distribution adjusting component includes multiple adjusting grooves arranged on the outer wall of the distribution cone and communicated with the distribution cone, and the adjusting grooves correspond to the outlet branch pipes one by one. The adjusting member is arranged on the adjusting groove, and the airflow control member is arranged inside the adjusting groove.

2. The adjustment device of claim 1, wherein The airflow control member is connected with the adjusting member and rotates with the adjusting member.

3. The adjustment device of claim 1, wherein The airflow control member includes multiple guide groove plates arranged along the length direction of the adjusting groove.

4. The adjustment device of claim 1, wherein The guide groove plate is composed of two guide groove side plates arranged oppositely and spaced by a guide groove distance.

5. The adjustment device according to any of claims 1-4, characterized in that The guide groove side plate is an obtuse triangle or a right triangle.

6. The adjustment device of claim 5, wherein, The obtuse angle or the right angle of each guide groove side plate is a connection point with the adjusting member.

7. The adjustment device of claim 5, wherein, The bottom plate is connected between the guide groove side plates.

8. The adjustment device of claim 7, wherein, The bottom plate is parallel to the side of the adjusting groove away from the distribution cone.

9. The adjustment device of claim 8, wherein, The cross-sectional area of the distribution cone from the input port to the outlet top plate increases gradually.

10. The adjustment device of claim 9, wherein, The outlet branch pipes are evenly arranged on the outlet top plate.

11. A method for adjusting the concentration distribution of a solid phase medium in a gas-solid two-phase flow, characterized by, The width of the guide groove is equal to the flow gap. The length and width of the adjusting groove are adapted to the airflow control member. The height of the adjusting groove is 2 / 3-1 times of the airflow control member. The adjusting member includes an adjusting handle, a scale disc, an adjusting shaft and a sealing sleeve. The adjusting shaft is connected with the adjusting handle at one end of the adjusting groove. The adjusting handle slides along the scale disc to record the rotation angle of the adjusting shaft. The sealing sleeve is sleeved on the adjusting shaft to seal the adjusting groove. The outlet top plate in the distribution cone is provided with an impact cone for equalizing the medium flow at the outlet top plate. The impact cone keeps a safe distance from the airflow control member during the rotation of the airflow control member. The flow equalizing component includes a Venturi flow equalizing member and a flow equalizing plate member. The medium flow passes through the Venturi flow equalizing member and the flow equalizing plate member in sequence to be equalized and then enters the distribution cone. The flow equalizing plate member includes multiple flow equalizing plate members arranged uniformly in the circumferential direction to further equalize and de-rotate the passing medium flow. The adjusting device is used for adjusting the concentration distribution of solid-phase medium in gas-solid two-phase flow. By using the adjusting member on each adjusting slot, the angle of the airflow control member penetrating into the distribution cone is adjusted, so that the part of medium passing through the airflow control member is deflected away from the corresponding outlet branch pipe; at the same time, the gaseous medium in the medium flow is appropriately supplemented from other areas through the resistance characteristics between the outlet branch pipes, so as to finally realize the stability of the distribution characteristics of the gaseous medium in each outlet branch pipe.

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