Vibration fluidized bed dust removal system and vibration fluidized bed dust removal method

Abstract

The invention provides a vibrated fluidized bed dust removal system and a vibrated fluidized bed dust removal method. The filtering effect of dust-containing airflow can be improved. The vibrated fluidized bed dust removal system comprises a fluidized bed body, the fluidized bed body is used for containing filter material particles, the fluidized bed body is provided with a cylindrical bed body side wall part, and the whole bed body side wall part is obliquely arranged in the first direction relative to the vertical direction; the side wall part of the bed body is provided with an inlet part and an outlet part, and the inlet part and the outlet part are sequentially distributed in the first direction or the outlet part and the inlet part are sequentially distributed in the first direction; in addition, the vibration fluidized bed dust removal system further comprises a vibration mechanism, and the vibration mechanism is connected with the fluidized bed body.

Description

Technical Field

[0001] The present application relates to the technical field of dust removal, and in particular to a vibrating fluidized bed dust removal system and a vibrating fluidized bed dust removal method. Background Art

[0002] Filtration and dust removal of dust-laden airflow has always been one of the important tasks in the field of dust removal. For example, when conveying flue gas to an integrated thermal storage system, dust removal of flue gas is required.

[0003] The integrated heat storage system is an effective means to improve the operational flexibility of thermal power units. When the grid load is low, the integrated heat storage system can store the thermal energy of boiler flue gas in the system, and convert the stored thermal energy into electrical energy when the grid is at peak. Boiler flue gas often contains a large amount of dust, that is, boiler flue gas is a dusty airflow. If the boiler flue gas is directly transported to the heat exchange equipment of the integrated heat storage system, long-term dust scouring will cause wear of the heat exchange equipment and reduce its life. Some dust will also adhere to the heat exchange equipment, seriously affecting the operating efficiency and safety of the heat exchange equipment. It can be seen that improving the filtering effect of dusty airflow is a technical problem that needs to be solved. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present application is to provide a vibrating fluidized bed dust removal system and a vibrating fluidized bed dust removal method, which can improve the filtering effect of dust-laden airflow.

[0005] The vibrating fluidized bed dust removal system provided by the present application comprises a fluidized bed body, the fluidized bed body is used to load filter material particles, the fluidized bed body has a cylindrical bed body side wall portion, the entirety of the bed body side wall portion is inclined relative to the vertical in a first direction; the bed body side wall portion is provided with an inlet portion and an outlet portion, the inlet portion and the outlet portion are sequentially distributed along the first direction or the outlet portion and the inlet portion are sequentially distributed along the first direction;

[0006] Furthermore, the vibrating fluidized bed dust removal system further comprises a vibrating mechanism, and the vibrating mechanism is connected to the fluidized bed body.

[0007] Optionally, the vibrating fluidized bed system further comprises an inlet pipe, wherein the inlet pipe is connected to the inlet portion; the inlet pipe is provided with at least two inlet portions, and flow directions of at least two of the inlet portions have an angle.

[0008] Optionally, the inlet pipe has a first port portion and a second port portion that are relatively distributed, the first port portion is one of the inlet portions, and the second port portion is in communication with the inlet portion;

[0009] The inlet pipe has a pipe side wall portion, and the pipe side wall portion is provided with at least one inlet portion.

[0010] Optionally, a baffle is provided in the inlet pipe, and the baffle is located downstream of all the inlet parts;

[0011] The baffle has a through hole, and / or at least a portion of an outer peripheral side of the baffle has a gap with a pipe wall of the inlet pipe.

[0012] Optionally, the inlet pipe is arranged to be inclined relative to the horizontal direction.

[0013] Optionally, at least one of the inlet portions of the inlet pipe is connected to a high-temperature flue gas pipe, and at least one of the inlet portions is connected to a low-temperature flue gas pipe.

[0014] Optionally, the fluidized bed body is a square structure, the bed body side wall portion includes two side wall portions arranged opposite to each other along the first direction, the inlet portion is arranged at one of the side wall portions, and the outlet portion is arranged at the other side wall portion.

[0015] Optionally, the fluidized bed further comprises a bed bottom wall portion, and an upper surface of the bed bottom wall portion is gradually inclined upward from one end close to the inlet portion to the other opposite end.

[0016] Optionally, the vibrating fluidized bed system further comprises a first pressure detection element, a second pressure detection element and a control unit, wherein the first pressure detection element is used to detect the inlet pressure of the inlet portion, and the second pressure detection element is used to detect the outlet pressure of the outlet portion;

[0017] The first pressure detection element, the second pressure detection element and the vibration mechanism are all connected to the control unit by signal.

[0018] Optionally, a discharge port is provided on the bottom wall of the fluidized bed, the barrel is located below the fluidized bed, and the discharge port is communicated with the barrel; the barrel has a discharge port, and the discharge port is provided with a control valve;

[0019] The vibrating fluidized bed system further comprises a third pressure detection element, and the barrel is directly or indirectly supported on the third pressure detection element; the third pressure detection element and the control valve are both connected to the control unit by signal.

[0020] The present application also provides a vibrating fluidized bed dust removal method, based on any of the above-mentioned vibrating fluidized bed dust removal systems, comprising:

[0021] detecting an inlet pressure of the inlet portion and an outlet pressure of the outlet portion to obtain a pressure difference;

[0022] If the pressure difference exceeds a first preset value, the vibration mechanism is controlled to drive the fluidized bed to vibrate. During the vibration process, if the pressure difference is lower than a second preset value, the vibration mechanism is controlled to stop vibrating. The second preset value is smaller than the first preset value.

[0023] Optionally, the amount of dust in the barrel is detected to control the discharge of the barrel according to the amount of dust.

[0024] The vibrating fluidized bed dust removal system in the present application achieves unidirectional flow of filter particles during vibration by tilting the side walls of the fluidized bed. Furthermore, the inlet and outlet of the airflow are also distributed along the tilted direction of the side walls of the bed. Thus, when the filter particles are driven by the vibration mechanism, they can circulate unidirectional convection, thereby transferring the particles on the side with low filtration utilization rate to the side with high filtration utilization rate on the main flow path of the airflow, thereby improving the utilization rate of the filter particles and the filtration efficiency. That is, the flow of the airflow forms a coupling, thereby improving the utilization rate of the filter particles and the filtration efficiency.

[0025] The vibrating fluidized bed dust removal method in the present application determines whether the dust content in the filter material pile is too high through the pressure difference, so as to discharge the dust by vibration. The vibration mechanism works intermittently, and has the advantages of low investment cost and low operating energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the vibrating fluidized bed dust removal system in the embodiment of the present application;

[0027] Figure 2 for Figure 1 Schematic diagram of the structure of the fluidized bed;

[0028] Figure 3 for Figure 1 Schematic diagram of the structure of the vibration mechanism;

[0029] Figure 4 This is a schematic diagram of the structure of another vibration mechanism in an embodiment of the present application;

[0030] Figure 5 This is a schematic diagram showing the change of the number of small particles in the vibrating fluidized bed dust removal system with the vibration time in the embodiment of the present application;

[0031] Figure 6 A schematic diagram of the motion trajectory of a tracer filter material particle at multiple moments in an embodiment of the present application;

[0032] Figure 7 for Figure 1 Schematic diagram of the structure of the fluidized bed;

[0033] Figure 8It is a temperature cloud diagram of the air flow passing through the vibrating fluidized bed dust removal system in the embodiment of the present application;

[0034] Fig. 9 It is the temperature cloud diagram of the direct mixing of two dusty flue gas flows in the traditional way;

[0035] Fig.10 for Figure 7 A top view of the bottom wall of the medium fluidized bed.

[0036] The following are the descriptions of the reference numerals:

[0037] 10-fluidized bed body; 101-bed body side wall; 1011-first side wall; 1011a-first inlet; 1012-second side wall; 1012a-first outlet; 1013-third side wall; 1014-fourth side wall; 102-bed body top wall; 103-bed body bottom wall; 103a-discharging port;

[0038] 201 - first pressure detection element; 202 - second pressure detection element; 203 - third pressure detection element;

[0039] 30-vibration mechanism; 301-workbench; 302-base frame; 303-vibration table; 304-piston cylinder; 305-track; 306-piston; 307-first connecting rod; 308-second connecting rod;

[0040] 40-support frame;

[0041] 50- control unit;

[0042] 60-inlet pipe; 601-inlet part;

[0043] 70-barrel;

[0044] 80-filter material pile; 801-filter material particles;

[0045] 90-export pipe;

[0046] 100- baffle;

[0047] 110-control valve;

[0048] 120-first orifice plate;

[0049] 130 - second orifice plate. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. In the embodiments of the present application, the terms "first" and "second" are only used to distinguish the same or similar features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0051] Please refer to Figure 1 , Figure 1 It is a schematic diagram of the structure of the vibrating fluidized bed dust removal system in the embodiment of the present application.

[0052] The vibrating fluidized bed dust removal system in this embodiment includes a fluidized bed body 10, and the fluidized bed body 10 is used to load filter particles 801, and the filter particles 801 can absorb and filter dust in the airflow. The type of filter particles 801 is not limited in this embodiment, and can be aluminum oxide, quartz sand, etc. The fluidized bed body 10 is a shell structure for accommodating the filter particles 801 to form a filter pile 80. Figure 1 In the fluidized bed, the bed 10 has a bed side wall portion 101, a bed top wall portion 102 and a bed bottom wall portion 103, and the bed side wall portion 101 is arranged around the bed bottom wall portion 103 and the bed top wall portion 102 to enclose a cavity to accommodate the filter material particles 801.

[0053] Among them, the side wall portion 101 of the fluidized bed body 10 is provided with an inlet portion 1011a and an outlet portion 1012a, and the inlet portion 1011a and the outlet portion 1012a are arranged opposite to each other, that is, the flow directions of the inlet portion 1011a and the outlet portion 1012a are roughly the same, and the flow direction refers to the flow direction of the airflow in the inlet portion 1011a and the outlet portion 1012a. Usually, the inlet portion 1011a and the outlet portion 1012a are regular channel structures, and the flow direction is also the axial direction of the inlet portion 1011a and the outlet portion 1012a. If the flow directions are consistent, the axes of the inlet portion 1011a and the outlet portion 1012a are roughly coincident or staggered but roughly parallel, and the airflow flows out of the inlet portion 1011a and flows toward the outlet portion 1012a. Figure 1 In the figure, the inlet 1011a and the outlet 1012a are arranged opposite to each other, that is, when projected along the flow direction of the inlet 1011a, the projection surfaces of the two completely overlap or the projection surface of one is located within the projection surface of the other.

[0054] It is worth noting that in this embodiment, the side wall portion 101 of the fluidized bed 10 is tilted relative to the vertical direction. Figure 2 understand, Figure 2 for Figure 1 A schematic structural diagram of the fluidized bed 10.

[0055] The side wall portion 101 of the fluidized bed 10 in this embodiment is a square structure, that is, the cross section along the horizontal direction is a square, which can be a square or a rectangle. At this time, the side wall portion 101 of the fluidized bed includes two groups of side wall portions that are arranged oppositely, one group is the first side wall portion 1011 and the second side wall portion 1012 that are arranged oppositely, and the other group is the third side wall portion 1013 and the fourth side wall portion 1014 that are arranged oppositely. The first side wall portion 1011, the second side wall portion 1012, the third side wall portion 1013, and the fourth side wall portion 1014 are connected end to end in sequence to enclose a cylindrical side wall portion 101 of the fluidized bed. At this time, the inlet portion 1011a and the outlet portion 1012a are respectively arranged on the two side wall portions that are arranged oppositely along the first direction. Figure 2 Specifically, the inlet 1011a is arranged on the first side wall 1011, and the outlet 1012a is arranged on the second side wall 1012. At this time, the inlet 1011a and the outlet 1012a are also arranged relative to each other. Obviously, the bed side wall 101 is not limited to a square structure. For example, it is cylindrical. The inlet 1011a and the outlet 1012a are arranged relative to each other. Then, the inlet 1011a and the outlet 1012a are distributed along the first direction and roughly along the radial direction of the cylinder. This is also a possible solution. It should be noted that the purpose of arranging the inlet 1011a and the outlet 1012a relative to each other here is to allow the airflow to flow from one side of the fluidized bed 10 to the other side, so as to produce a coupling effect with the movement trajectory of the filter material particles 801, which will be described in detail in the following content.

[0056] You can continue to refer to Figure 1 The vibrating fluidized bed dust removal system in this embodiment further includes a vibrating mechanism 30, which is connected to the fluidized bed body 10, so that the vibrating mechanism 30 can drive the fluidized bed body 10 to vibrate in the vertical direction, that is, vertical vibration.

[0057] like Figure 3 and Figure 4 As shown, Figure 3 for Figure 1 A schematic structural diagram of the vibration mechanism 30; Figure 4 Schematic diagram of the structure of another vibration mechanism 30 in the embodiment of the present application.

[0058] The vibration mechanism 30 in this embodiment can vibrate at a certain frequency and amplitude. Figure 3 The vibration mechanism 30 includes a workbench 301 and a coil (not shown in the figure) placed in a magnetic field. The workbench 301 is connected to the coil. An excitation signal can be input into the coil to drive the workbench 301 connected to the coil to vibrate. Figure 1In the embodiment, the workbench 301 is specifically connected to the fluidized bed body 10 through the support frame 40. The workbench 301 is connected to the support frame 40, driving the support frame 40 to vibrate up and down. The fluidized bed body 10 is supported by the support frame 40 and can vibrate with the vibration of the support frame 40. The up and down directions described in the text can refer to Figure 1 understand, Figure 1 The up-down direction is defined by the position of the fluidized bed body 10 during normal operation. It can be seen that the fluidized bed body 10 can also be directly supported on the workbench 301, where a support frame 40 is provided to raise the fluidized bed body 10 and leave space for the barrel 70.

[0059] Figure 4 The vibration mechanism 30 includes a vibration table 303, a connecting rod assembly, a circular track 305 and a piston cylinder 304. The connecting rod assembly includes a first connecting rod 307 and a second connecting rod 308. The first connecting rod 307 is connected to the vibration table 303, and the second connecting rod 308 is connected to the piston 306 in the piston cylinder 304. One end of the two connecting rods is hinged to each other and can slide along the track 305. The piston 306 of the piston cylinder 304 reciprocates to drive the connecting rod assembly to move, thereby driving the vibration table 303 to reciprocate up and down. The vibration table 303 is connected to the fluidized bed body 10 to drive the fluidized bed body 10 to vibrate. The vibration mechanism 30 can also be other structural forms, which can be understood by referring to the existing technology and will not be repeated one by one, as long as it can generate vibration, thereby driving the fluidized bed body 10 to vibrate up and down.

[0060] When the dust-containing airflow enters the fluidized bed body 10 from the inlet 1011a, it will flow through the filter pile 80. The airflow filtered by the filter pile 80 flows out from the outlet 1012a, and the filtered dust remains in the filter pile 80 of the fluidized bed body 10. When there is a lot of dust accumulated in the filter material pile 80 and it affects the filtering effect, the vibration mechanism 30 can be started. The particle size of the filter material particles 801 is larger than the particle size of the dust. Under the action of vibration, the small-sized dust will gradually move downward, that is, the dust and the filter material particles 801 will produce a "brazil nut effect", and the fine dust particles will enter the bottom wall 103 of the fluidized bed bed 10. The bottom wall 103 of the bed is provided with a discharge port 103a. A barrel 80 can be provided under the fluidized bed 10. The barrel 80 and the discharge port 103a are connected, and the dust can fall from the discharge port 103a into the barrel 80, so that the filter material particles 801 in the fluidized bed 10 can be renewed and recycled.

[0061] like Figure 5 As shown, Figure 5 This is a schematic diagram of the change in the number of small particles in the vibrating fluidized bed dust removal system with the vibration time in the embodiment of the present application.

[0062] To verify the effect of vibration in discharging dust, large and small particles with obvious differences in particle size can be evenly filled in the fluidized bed 10 to simulate the filter material pile 80 in a dusty state, that is, the large particles are the filter material particles 801, and the small particles simulate dust. Start the vibration mechanism 30, and record the change of the number of small particles (i.e., the number of simulated dust) in the fluidized bed 10 over the vibration time within 40 seconds, such as Figure 5 As shown, it can be seen that the number of small particles in the fluidized bed 10 decays exponentially with the vibration time, and the decay curve satisfies y=2029exp(-0.12t), where t is the horizontal axis time and the confidence level is 95%. Within 40s, the number of small particles dropped from 2010 to 20, a decrease of 99.0%, which is a significant effect. It can be seen that the vibrating fluidized bed dust removal system has the self-cleaning function of the filter material particles 801.

[0063] It is worth noting that in this embodiment, the side wall portion 101 of the fluidized bed 10 is tilted as a whole, that is, tilted in one direction, which can be defined as a first direction, and the aforementioned inlet portion 1011a and outlet portion 1012a are also distributed along the first direction.

[0064] At this time, you can refer to Figure 6 , Figure 6 A tracer filter material particle 801 ( Figure 6 Schematic diagram of the movement trajectory of filter particles (marked in red) at multiple times.

[0065] Figure 6 The movement trajectories of the traced filter material particles 801 at 0s, 10s, 20s, 30s, and 40s after the start of vibration are respectively shown. The traced filter material particles 801 are selected as the particles close to the second side wall portion 1012 on the right side. It can be seen that the traced filter material particles 801 move from the right side upward to the left, and then downward to the right to complete a one-way convection, that is, as the fluidized bed body 10 vibrates up and down, the filter material particles 801 inside it can perform one-way convection, and the trend direction of the one-way convection is opposite to the first direction. Figure 6 The fluidized bed 10 is tilted from left to right, and the filter particles 801 are unidirectionally moving from right to left, that is, the filter particles 801 do not move in a straight line from right to left, but also include position changes in the up and down directions, and the movement trajectory is roughly circular. Figure 6 The corresponding specific experimental parameters are that the vibration mechanism 30 has a vibration frequency of 20 Hz and a vibration amplitude of 2.48 mm.

[0066] In principle, since the fluidized bed 10 is tilted, Figure 1From a viewing angle, the fluidized bed body 10 is tilted from left to right, with the first side wall portion 1011 pressing downwardly against the filter material particles 801 close to the left side, and the second side wall portion 1012 lifting upwardly the filter material particles 801 close to the right side. At this time, the resistance to the upward movement of the filter material particles 801 close to the first side wall portion 1011 on the left side is greater than the resistance to the filter material particles 801 close to the second side wall portion 1012 on the right side. Accordingly, the resistance to the downward movement of the filter material particles 801 close to the first side wall portion 1011 on the left side is less than the resistance to the filter material particles 801 close to the second side wall portion 1012 on the right side.

[0067] Therefore, when the vibration mechanism 30 drives the fluidized bed 10 to vibrate, the filter particles 801 and the side wall 101 of the bed will collide. When the collision occurs, the first side wall 1011 on the left side will promote the filter particles 801 on the left side to move downward, and the second side wall 1012 on the right side will promote the filter particles 801 on the right side to move upward. Then, the filter particles 801 on the left side that move downward gradually fill the right side space, and the filter particles 801 on the right side move upward and left to the left side space. Therefore, a one-way convection is formed in which the filter particles 801 fall along the wall surface of the first side wall 1011 on the left side and rise along the wall surface of the second side wall 1012 on the right side. This can also be combined with Figure 1 The arrows in the figure indicate understanding. Figure 6 The movement trajectory of the filter material particles 801 traced in the figure also verifies that the inclined setting of the bed side wall portion 101 of the fluidized bed 10 can cause unidirectional convection of the filter material particles 801 .

[0068] It can be seen that in this embodiment, by tilting the side wall portion 101 of the fluidized bed 10, the filter material particles 801 can achieve unidirectional flow during the vibration process, thereby coupling with the flow of the airflow. Figure 1 It is understood that the bed side wall portion 101 is inclined along the first direction. Figure 1 The first direction is from left to right, and the inlet 1011a and the outlet 1012a are sequentially distributed along the first direction. Figure 1That is, the inlet 1011a is on the left and the outlet 1012 is on the right. The airflow enters from the left side and flows out from the opposite right side. The dust in the airflow is easy to accumulate at the position of the filter material particles 801 on the left side. The utilization rate of the filter material particles 801 on the right side is lower than that of the filter material on the left side. When the filter material particles 801 can be circulated for one-way convection, the right side particles with low filtration utilization rate can be transferred to the left side near the position where the airflow enters, that is, the filter material particles 801 covered with dust (of course, part of the dust will enter the bottom wall 103 of the bed body downward during vibration) are replaced with relatively clean filter material particles 801. It can be seen that this embodiment can transfer the filter material particles 801 on the side with low filtration utilization rate to the side with high utilization rate of the filter material particles 801 on the main flow path of the airflow, thereby improving the utilization rate and filtration efficiency of the filter material particles 801, so that the vibrating fluidized bed dust removal system has a self-cleaning function.

[0069] It can be understood that the outlet 1012a and the inlet 1011a may be distributed in sequence along the first direction. Figure 1 That is, the outlet is on the left and the inlet is on the right. In this way, more dust gathers on the right side. During vibration, the filter material particles 801 with a higher utilization rate on the left side can be updated to the right side, which can also achieve the purpose of improving the utilization rate of the filter material particles 801 and the filtration efficiency.

[0070] It can be seen that the vibrating fluidized bed dust removal system in this embodiment has a better filtering effect on dust-laden airflow due to its self-cleaning function. The vibrating fluidized bed vibration system is used, for example, to provide airflow from boiler flue gas to the heat exchange equipment of the integrated heat storage system, which is beneficial to protecting the heat exchange equipment.

[0071] Please see Figure 7 , Figure 7 for Figure 1 A schematic structural diagram of the fluidized bed 10.

[0072] Figure 7 The figure shows the inclination angle β of the fluidized bed body 10, that is, the angle with the vertical direction. The size of the inclination angle β can be adjusted according to engineering requirements to facilitate the renewal and utilization of the filter material particles 801 by unidirectional convection. This embodiment does not impose any specific limitation on the size of β.

[0073] Please continue to refer to Figure 1The vibrating fluidized bed dust removal system in this embodiment also includes an inlet pipe 60, which is connected to the inlet part 1011a, that is, the airflow enters from the inlet pipe 60 and then flows to the inlet part 1011a, and enters the fluidized bed body 10. In addition, the inlet pipe 60 is provided with at least two inlet parts 601, that is, the airflow entering the inlet pipe 60 is a multi-channel airflow, and the flow direction of at least two inlet parts 601 has an angle, and the definition of the flow direction can be understood with reference to the flow direction of the inlet part 1011a and the outlet part 1012a mentioned above. The flow direction of at least two inlet parts 601 has an angle, so at least two airflows enter the inlet pipe 60 in different directions, which is conducive to the full mixing of different airflows. For example, the multi-channel airflow can be an airflow with different temperatures. In detail, it can be a high-temperature dust-containing flue gas airflow and a low-temperature dust-containing flue gas airflow entering the inlet pipe 60 for mixing, and then dust removal and filtration are performed in the fluidized bed body 10. At this time, at least one inlet portion 601 of the inlet pipe 60 can be connected to the high-temperature flue gas pipe, and at least one inlet portion 601 can be connected to the low-temperature flue gas pipe, that is, the vibrating fluidized bed dust removal system in this embodiment can not only filter and remove dust from the airflow, but also mix gases of different flue temperatures to form a mixed airflow of the required temperature, for example, it can achieve uniform mixing of dust-containing flue gas airflows with large temperature differences.

[0074] In some specific embodiments, the inlet portion 1011 a may be provided with a first orifice plate 120 to prevent the filter material particles 801 from entering the inlet pipe 60 . Figure 1 In the embodiment, the vibrating fluidized bed dust removal system further comprises an outlet pipe 90, in which a second orifice plate 130 may be provided, which may also prevent the filter material particles 801 from entering the outlet pipe 90. The inlet pipe 60 and the outlet pipe 90 are conveniently connected to the input and output pipes of the airflow.

[0075] In some specific embodiments, the inlet pipe 60 has a first port portion and a second port portion that are relatively distributed, that is, two ends of the inlet pipe 60 in the length direction, wherein the first port portion is an inlet portion 601, and the second port portion is connected to the inlet portion 1011a. Figure 1 In the figure, the first port portion is the left end port portion of the inlet pipe 60, and the second port portion is the right end port portion of the inlet pipe 60. In addition, the inlet pipe 60 has a pipe side wall portion, and the pipe side wall portion is provided with at least one inlet portion 601, that is, one airflow enters along the length direction of the inlet pipe 60, and another or multiple airflows enter from the side of the inlet pipe 60. The directions of the airflow entering from the side and the airflow entering from the first port portion are perpendicular to each other, so that the impact mixing effect is better, for example, when the high-temperature dust-containing flue gas airflow and the low-temperature dust-containing flue gas are mixed, the smoke temperature distribution will be more uniform. Figure 1In the figure, an inlet portion 601 is provided on opposite sides of the pipe side wall portion of the inlet pipe 60, and the airflow directions of the two inlet portions 601 located on the pipe side wall portion are opposite, and at the same time, they are perpendicular to the airflow direction in the inlet portion 601 of the first port portion, so that they can be fully mixed.

[0076] Furthermore, a baffle 100 may be provided in the inlet pipe 60 in the present embodiment, and the baffle 100 is located downstream of all the inlet portions 601, that is, after the airflow enters the inlet pipe 60 through the inlet portion 601, it will flow downstream to the position of the baffle 100. Then, when the airflow carrying dust passes through the position of the baffle 100, the flow direction will change, and the dust will be intercepted at the position of the baffle 100, that is, the baffle 100 has an inertial dust removal effect, and the mixing effect can also be improved when multiple airflows are intercepted by the baffle 100. At this time, the baffle 100 has a through hole, that is, the baffle 100 must ensure that the airflow can continue to flow downstream under the premise of intercepting and removing dust. Of course, the baffle 100 can also be arranged so that there is a gap between at least part of its outer peripheral side and the pipe wall of the inlet pipe 60, such as Figure 1 As shown, the airflow can flow downstream from the gap, or through both the holes and the gap.

[0077] In addition, if Figure 1 As shown, the inlet pipe 60 in this embodiment can be inclined relative to the horizontal direction, and the inclination angle is α. The inclination angle α can be set to be greater than the repose angle of the dust, so that the dust collected in the inlet pipe 60 can automatically fall into the fluidized bed body 10 along the inlet pipe 60 under the action of gravity, avoiding the accumulation of dust in the inlet pipe 60. The dust falling into the fluidized bed body 10 will be collected in the barrel 70 when vibrating.

[0078] Please continue to refer to Figure 8 and Fig. 9 , Figure 8 The temperature cloud diagram of the airflow passing through the vibrating fluidized bed dust removal system in the embodiment of the present application, wherein a low-temperature dust-containing flue gas airflow with a temperature of 500° C. enters from both sides of the pipe side wall portion of the inlet pipe 60, and a high-temperature dust-containing flue gas airflow with a temperature of 700° C. enters from the first port portion of the inlet pipe 60, for a total of three airflows; Fig. 9 This is the temperature cloud diagram of the direct mixing of two dust-laden flue gas flows in the traditional way.

[0079] Figure 8 , 9The temperature difference of the mixed air flow is 200°C. It can be seen that under the traditional mixing method, there is still a large temperature difference in the air flow at the outlet 1012a, and the maximum temperature difference reaches 107.6°C. However, under the mixing method in this embodiment, the maximum temperature difference of the air flow at the outlet 1012a is significantly reduced, and the specific value is only 2.6°C. It can be seen that the vibrating fluidized bed dust removal system in this embodiment is conducive to achieving large temperature difference mixing of dust-containing airflow.

[0080] On the one hand, when the airflow enters the inlet pipe 60, it can be mixed once by introducing different flow directions. On the other hand, the baffle 100 can rectify the dust-laden airflow with a large temperature difference after preliminary mixing. Furthermore, the filter material pile 80 has a porous characteristic, which can promote the mutual movement between dust-laden fluids with a large temperature difference, and cooperate in many aspects to achieve uniform mixing of the airflow with a large temperature difference. It can be seen that the vibrating fluidized bed dust removal system has the advantages of a wide filtration temperature zone, a small fluid temperature drop, and wide adaptability. It can be understood that even if there is no inlet portion 601 with different air inlet angles, or the baffle 100 is not set, the porous characteristics of the filter material pile 80 itself are also conducive to promoting the mixing of the airflow.

[0081] Taking the integrated heat storage system as an example, in order to ensure the stability and safety of the heat storage process, high-temperature and low-temperature flue gases are usually extracted and mixed, and the mixed flue gases are input into the integrated heat storage system for energy storage. Fig. 9 When the traditional mixing method simultaneously delivers high and low temperature flue gases to the air supply flue of the integrated heat storage system, the flue gases are mixed by themselves through convection and diffusion. The flue of this mixing method is relatively long, has no dust removal effect, and the flue gas temperature is not mixed evenly. The temperature uniformity of the mixed flue gas is of great significance to the safe and stable operation of the heat exchange equipment. The vibrating fluidized bed dust removal system in this embodiment can better achieve the mixing of multiple airflows, and the flue gas temperature is relatively evenly mixed, which is conducive to ensuring the safe and stable operation of the heat exchange equipment.

[0082] Look again Fig.10 , Fig.10 for Figure 7 A top view of the bed bottom wall portion 103 of the medium fluidized bed 10 .

[0083] The fluidized bed 10 also includes a bed bottom wall 103, which has a discharge port 103a. The bed bottom wall 103 in this embodiment is a grid structure with multiple grid ports, which are the discharge ports 103a. The grid structure is conducive to forming multiple discharge ports 103a and is conducive to the falling of dust. It can be seen that it is not limited to a grid structure, such as a porous plate. In addition, the upper surface of the bed bottom wall 103 is gradually tilted upward from one end close to the inlet 1011a to the other end opposite. The tilted setting makes it easier for the dust that vibrates and falls to the bottom to fall more smoothly from the discharge port 103a of the bed bottom wall 103. As mentioned above, there is more dust on one side of the inlet 1011a, and the tilt direction of the upper surface of the bed bottom wall 103 is gradually tilted from one end close to the inlet 1011a to the other end, which is more conducive to the falling of dust. The inclination direction and angle γ of the upper surface of the bed bottom wall 103 can be adjusted according to engineering requirements. Fig.10 As shown, when the bed bottom wall 103 is a grille structure, the parallel spacing between adjacent grille openings is L, and the spacing L can be set to be smaller than the diameter D of the filter particles 801, but larger than the diameter d of the dust particles, that is, the filter particles 801 will not leak out from the discharge port 103a, while the dust can be discharged from the discharge port 103a. Here, only the upper surface of the bed bottom wall 103 is set to be inclined, and the lower surface is a horizontal plane. In this way, the bed bottom wall 103 is actually designed with unequal thickness, which is conducive to ensuring the bearing strength. Of course, it is also possible to set the entire bed bottom wall 103 to be inclined.

[0084] The vibrating fluidized bed dust removal system in this embodiment further includes a first pressure detection element 201, a second pressure detection element 202 and a control unit 50. The first pressure detection element 201, the second pressure detection element 202 and the vibration mechanism 30 are all connected to the control unit 50 by signal. The first pressure detection element 201 is used to detect the inlet pressure Pin of the inlet portion 1011a, and the second detection element 202 is used to detect the outlet pressure Pout of the outlet portion 1012a, that is, pressure detection elements are respectively provided at the inlet portion 1011a and the outlet portion 1012a. In this way, the first pressure detection element 201, the second pressure detection element 202 and the control unit 50 are connected by signals, and the detected pressure signal can be output to the control unit 50. The control unit 50 can obtain the pressure difference ΔP before and after the airflow passes through the fluidized bed body 10. When the pressure difference ΔP exceeds the first preset value ΔP0, it indicates that the dust content in the filter material pile 80 inside the fluidized bed body 10 is high, resulting in greater resistance and thus greater pressure drop. The control unit 50 can control the vibration mechanism 30 to start, so as to drive the fluidized bed body 10 to vibrate, and vibrate the filtered dust into the barrel 70, so that the resistance of the filter material pile 80 is reduced, which is reflected in the pressure difference ΔP between the inlet pressure Pin and the outlet pressure Pout, that is, the pressure difference ΔP is reduced. When the pressure difference ΔP is less than the preset value second preset value ΔP0 (the second preset value ΔP0 is less than the first preset value ΔP0), the vibration mechanism 30 can be controlled to stop vibrating. In this way, the vibration mechanism 30 is an intelligent intermittent operation, which has the advantages of low investment cost and low operating energy consumption.

[0085] like Figure 1 As shown, the barrel 70 in this embodiment has a discharge port, and the discharge port is provided with a control valve 110. When the control valve 110 of the discharge port is opened, the dust collected in the barrel 70 can be discharged. At this time, the vibrating fluidized bed dust removal system also includes a third pressure detection element 203, and the barrel 70 is directly or indirectly supported by the third pressure detection element 203. The third pressure detection element 203 and the control valve 110 are both connected to the control unit 50 by signal. Then the pressure detected by the third pressure detection element 203 can reflect the total mass of the barrel 70 and the dust inside it. The mass of the barrel 70 itself is known, and the mass of the dust in the barrel 70 can be fed back. According to the characteristics of the dust, the parameters such as the density of the dust can be obtained, and the volume of the dust can also be detected, that is, the amount of dust in the barrel 70 can be known, and then it is judged whether the dust in the barrel 70 is full or reaches a preset height, that is, whether it is necessary to discharge. If necessary, the control unit 50 can control the control valve 110 to open to discharge the dust, and the barrel 70 can continue to store materials.

[0086] Figure 1In the embodiment, the vibration mechanism 30 is connected to the fluidized bed body 10 through the support frame 40, and the third pressure detection element 203 can be arranged between the support frame 40 and the vibration mechanism 30, that is, the third pressure detection element 203 indirectly supports the barrel 70. The mass obtained after the third pressure detection element 203 detects the pressure is the total mass m of the support frame 40, the fluidized bed body 10 and its filter material pile 80, the barrel 70 and its dust. Except for the dust mass, the remaining masses are known, and the dust amount can be calculated. A preset value m0 of the total mass can also be set. If the detected total mass m is greater than the preset value m0, it indicates that the dust amount is too high, and the control valve 110 can be opened for discharge. In addition, the barrel 70 independent of the fluidized bed body 10 is used in this embodiment, which can provide convenience for the subsequent waste heat recovery of high-temperature dust.

[0087] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. Vibrating fluidized bed dust removal system, characterized in that: The fluidized bed comprises a fluidized bed body (10), the fluidized bed body (10) being used to load filter material particles (801), the fluidized bed body (10) having a cylindrical bed body side wall portion (10), the bed body side wall portion (10) being arranged as a whole inclined in a first direction relative to the vertical direction; the bed body side wall portion (10) being provided with an inlet portion (1011a) and an outlet portion (1012a), the inlet portion (1011a) and the outlet portion (1012a) being distributed in sequence along the first direction or the outlet portion (1012a) and the inlet portion (1011a) being distributed in sequence along the first direction; Furthermore, the vibrating fluidized bed dust removal system further comprises a vibrating mechanism (30), wherein the vibrating mechanism (30) is connected to the fluidized bed body (10).

2. The vibrating fluidized bed dust removal system according to claim 1, characterized in that: The vibrating fluidized bed system further comprises an inlet pipe (60), wherein the inlet pipe (60) is connected to the inlet portion (1011a); the inlet pipe (60) is provided with at least two inlet portions (601), and the flow directions of at least two of the inlet portions (601) have an angle.

3. The vibrating fluidized bed dust removal system according to claim 2, characterized in that: The inlet pipe (60) has a first port portion and a second port portion which are relatively distributed, the first port portion being an inlet portion (601), and the second port portion being in communication with the inlet portion (1011a); The inlet pipe (60) has a pipe side wall portion, and the pipe side wall portion is provided with at least one inlet portion (601).

4. The vibrating fluidized bed dust removal system according to claim 2 or 3, characterized in that: A baffle (100) is provided in the inlet pipe (60), and the baffle (100) is located downstream of all the inlet portions (601); The baffle plate (100) has a through hole, and / or at least a portion of the outer peripheral side of the baffle plate (100) has a gap with the pipe wall of the inlet pipe (60).

5. The vibrating fluidized bed dust removal system according to claim 4, characterized in that: The inlet pipe (60) is arranged inclined relative to the horizontal direction.

6. The vibrating fluidized bed dust removal system according to claim 2 or 3, characterized in that: At least one of the inlet portions (601) of the inlet pipe (60) is connected to a high-temperature flue gas pipe, and at least one of the inlet portions (601) is connected to a low-temperature flue gas pipe.

7. The vibrating fluidized bed dust removal system according to claim 1, characterized in that: The fluidized bed body is a square structure, the bed body side wall portion (10) comprises two side wall portions arranged opposite to each other along the first direction, the inlet portion (1011a) is arranged on one of the side wall portions, and the outlet portion (1012a) is arranged on the other of the side wall portions.

8. The vibrating fluidized bed dust removal system according to any one of claims 1 to 3 and 7, characterized in that: The fluidized bed body (10) further comprises a bed body bottom wall portion (103), the upper surface of the bed body bottom wall portion (103) being arranged to be gradually inclined upward from one end close to the inlet portion (1011a) to the other end opposite thereto.

9. The vibrating fluidized bed dust removal system according to any one of claims 1 to 3 and 7, characterized in that: The vibrating fluidized bed system further comprises a first pressure detection element (201), a second pressure detection element (202) and a control unit (50), wherein the first pressure detection element (201) is used to detect the inlet pressure of the inlet portion (1011a), and the second pressure detection element (202) is used to detect the outlet pressure of the outlet portion (1012a); The first pressure detection element (201), the second pressure detection element (202) and the vibration mechanism (30) are all connected to the control unit (50) via signals.

10. The vibrating fluidized bed dust removal system according to any one of claims 1 to 3 and 7, characterized in that: The bottom wall portion (103) of the fluidized bed body (10) is provided with a discharge port (103a); the barrel (70) is located below the fluidized bed body (10); the discharge port (103a) and the barrel (70) are in communication; the barrel (70) has a discharge port (1012a); and the discharge port (1012a) is provided with a control valve (110); The vibrating fluidized bed system further comprises a third pressure detection element (203), and the barrel (70) is directly or indirectly supported on the third pressure detection element (203); the third pressure detection element (203) and the control valve (110) are both connected to the control unit (50) by signal.

11. A vibrating fluidized bed dust removal method, characterized in that: The vibrating fluidized bed dust removal system according to any one of claims 1 to 10 comprises: detecting an inlet pressure of the inlet portion (1011a) and an outlet pressure of the outlet portion (1012a) to obtain a pressure difference; If the pressure difference exceeds a first preset value, the vibration mechanism (30) is controlled to drive the fluidized bed body (10) to vibrate; if the pressure difference is lower than a second preset value during the vibration process, the vibration mechanism (30) is controlled to stop vibrating, and the second preset value is smaller than the first preset value.

12. The vibrating fluidized bed dust removal method according to claim 11, characterized in that: The amount of dust in the barrel (70) is detected to control the discharge of the barrel (70) according to the amount of dust.

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