Vibrating fluidized bed dust removal system and vibrating fluidized bed dust removal method

Abstract

The application provides a vibrating fluidized bed dust removal system and a vibrating fluidized bed dust removal method, which can improve the filtering effect of dust-containing airflow. The vibrating fluidized bed dust removal system comprises a fluidized bed body, the fluidized bed body is used for loading filter material particles, the fluidized bed body has a cylindrical bed body side wall part, the whole of the bed body side wall part is arranged to be inclined to a first direction relative to the vertical direction, the bed body side wall part is provided with an inlet part and an outlet part, the inlet part and the outlet part are sequentially distributed along the first direction or the outlet part and the inlet part are sequentially distributed along the first direction, and the vibrating fluidized bed dust removal system further comprises a vibrating mechanism, and the vibrating mechanism is connected with the fluidized bed body.

Description

TECHNICAL FIELD

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

[0002] Filtering and dust removal of dust-containing gas flow has always been one of the important tasks in the field of dust removal. For example, when conveying flue gas to an integrated heat storage system, the flue gas needs to be de-dusted.

[0003] The integrated heat storage system is an effective means to improve the operation flexibility of a thermal power generating unit. During the low valley of the power grid load, the integrated heat storage system can store the heat energy of the boiler flue gas in the system, and convert the stored heat energy into electric energy during the peak of the power grid. The boiler flue gas often contains a large amount of dust, i.e. the boiler flue gas is a dust-containing gas flow. If the boiler flue gas is directly conveyed to the heat exchange equipment of the integrated heat storage system, the long-term dust scouring will cause the wear and tear of the heat exchange equipment and reduce the service life. Part of the dust will also adhere to the heat exchange equipment, seriously affecting the operation efficiency and safety of the heat exchange equipment. Therefore, it is a technical problem to be solved to improve the filtering effect of the dust-containing gas flow. SUMMARY

[0004] 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 the dust-containing gas flow.

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

[0006] Further, the vibrating fluidized bed dust removal system further comprises a vibrating mechanism, the vibrating mechanism is connected with the fluidized bed bed body.

[0007] Optionally, the vibrating fluidized bed system further comprises an inlet pipe, the inlet pipe communicates with the inlet part; the inlet pipe is provided with at least two inlet parts, and the flow directions of the at least two inlet parts have an included angle.

[0008] Optionally, the inlet pipe has oppositely distributed first and second port parts, the first port part is one of the inlet parts, and the second port part communicates with the inlet part.

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

[0010] Optionally, a baffle is arranged in the inlet pipe, downstream of all the inlet portions.

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

[0012] Optionally, the inlet pipe is arranged obliquely 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 has a square structure, and 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 on one of the side wall portions, and the outlet portion is arranged on the other side wall portion.

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

[0016] Optionally, the vibration fluidized bed system further includes a first pressure detection element, a second pressure detection element, and a control unit, 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 signal-connected to the control unit.

[0018] Optionally, a discharge port is arranged on the bed body bottom wall portion of the fluidized bed, a material cylinder is arranged below the fluidized bed, the discharge port is connected to the material cylinder, and the material cylinder has a discharge outlet portion provided with a control valve.

[0019] The vibration fluidized bed system further includes a third pressure detection element, the material cylinder is directly or indirectly supported on the third pressure detection element, and the third pressure detection element and the control valve are both signal-connected to the control unit.

[0020] The application also provides a vibration fluidized bed dust removal method based on the vibration fluidized bed dust removal system described in any one of the above.

[0021] The inlet pressure of the inlet portion and the outlet pressure of the outlet portion are detected to obtain a pressure difference.

[0022] If the pressure difference exceeds a first preset value, the vibrating mechanism is controlled to vibrate the fluidized bed body, and if the pressure difference is lower than a second preset value during the vibration, the vibrating mechanism is controlled to stop vibrating, the second preset value being lower than the first preset value.

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

[0024] The vibrating fluidized bed dust removal system in the present application can make the filter material particles flow in one direction during the vibration by tilting the side wall of the fluidized bed body, and the inlet and outlet of the airflow are also distributed along the tilting direction of the side wall of the fluidized bed body. In this way, the filter material particles can circulate and flow in one direction under the driving of the vibrating mechanism, so that the particles with low filter utilization rate are transferred to the side with high filter utilization rate on the main flow path of the airflow, thereby improving the utilization rate and filtering efficiency of the filter material particles, i.e. the airflow is coupled to improve the utilization rate and filtering efficiency of the filter material particles.

[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 by the pressure difference to vibrate and discharge the dust. The vibrating mechanism is intermittent, which has the advantages of low investment cost and low operating energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a structural schematic diagram of the vibrating fluidized bed dust removal system in the present application;

[0027] Figure 2 FIG. 2 is a structural schematic diagram of the fluidized bed body in the present application; Figure 1

[0028] FIG. 3 is a structural schematic diagram of the vibrating mechanism in the present application; Figure 3 Figure 1 FIG. 4 is a structural schematic diagram of another vibrating mechanism in the present application;

[0029] Figure 4 FIG. 5 is a diagram showing the change of the number of small particles in the vibrating fluidized bed dust removal system in the present application with the vibration time;

[0030] Figure 5 FIG. 6 is a diagram showing the motion trajectory of a tracer filter material particle at multiple time points in the present application;

[0031] Figure 6 FIG. 7 is a structural schematic diagram of the fluidized bed body in the present application;

[0032] Figure 7 Figure 1 FIG. 8 is a structural schematic diagram of the vibrating mechanism in the present application;

[0033] Figure 8 ​​Temperature cloud chart for the process that the gas flow passes through the vibrating fluidized bed dedusting system in the embodiment of the application;

[0034] Figure 9 Temperature cloud chart for the process that two dust-containing flue gas flows are directly mixed in the traditional way;

[0035] Figure 10 For Figure 7 The top view of the bottom wall part of the fluidized bed bed body.

[0036] The signs of the drawings are explained as follows:

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

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

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

[0040] 40-support frame;

[0041] 50-control unit;

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

[0043] 70-drum;

[0044] 80-filtered material pile; 801-filtered material particle;

[0045] 90-outlet pipeline;

[0046] 100-baffle;

[0047] 110-control valve;

[0048] 120-first orifice plate;

[0049] 130-second orifice plate. DETAILED DESCRIPTION

[0050] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments. In the embodiments of the present application, the terms "first", "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] Reference will be made to Figure 1 , Figure 1 The structure diagram of the vibration fluidized bed dust removal system in the embodiments of the present application is shown.

[0052] The vibration fluidized bed dust removal system in the embodiments includes a fluidized bed body 10 for loading filter material particles 801, the filter material particles 801 can adsorb dust in the filtering gas flow, and the type of the filter material particles 801 is not limited in the embodiments and can be alumina, quartz sand, etc. The fluidized bed body 10 is a shell structure for accommodating the filter material particles 801 to form a filter material pile 80. Figure 1 In the embodiments, the fluidized bed body 10 has a bed body side wall part 101, a bed body top wall part 102 and a bed body bottom wall part 103, the bed body side wall part 101 is arranged around the bed body bottom wall part 103 and the bed body top wall part 102 to enclose a cavity for accommodating the filter material particles 801.

[0053] In the embodiments, the bed body side wall part 101 of the fluidized bed body 10 is provided with an inlet part 1011a and an outlet part 1012a, the inlet part 1011a and the outlet part 1012a are oppositely arranged, that is, the through-flow directions of the inlet part 1011a and the outlet part 1012a are substantially the same, the through-flow direction refers to the flow direction of the gas flow in the inlet part 1011a and the outlet part 1012a, usually the inlet part 1011a and the outlet part 1012a are regular channel structures, the through-flow direction is also the axial direction of the inlet part 1011a and the outlet part 1012a, the through-flow directions are consistent, that is, the axes of the inlet part 1011a and the outlet part 1012a are substantially coincident or are staggered but substantially parallel, the gas flow flows toward the outlet part 1012a after flowing out of the inlet part 1011a. Figure 1 In the embodiments, the inlet part 1011a and the outlet part 1012a are oppositely arranged, that is, the projection of the through-flow direction of the inlet part 1011a is projected, and the projection planes of the two are completely coincident or the projection plane of one is located in the projection plane of the other.

[0054] It is worth noting that the bed body side wall part 101 of the fluidized bed body 10 in the embodiments is relatively vertically inclined as a whole. It can be understood in combination with Figure 2 that Figure 2 The structure diagram of the fluidized bed body 10 in the embodiments is shown. Figure 1

[0055] ​The bed side wall part 101 of the fluidized bed bed body 10 is square in structure in the embodiment, that is, the cross section in the horizontal direction is square, which can be square or rectangular. In this case, the bed side wall part 101 includes two groups of oppositely arranged side wall parts, one group being the oppositely arranged first side wall part 1011 and second side wall part 1012, and the other group being the oppositely arranged third side wall part 1013 and fourth side wall part 1014. The first side wall part 1011, second side wall part 1012, third side wall part 1013 and fourth side wall part 1014 are sequentially connected end to end to enclose the cylindrical bed side wall part 101. In this case, the inlet part 1011a and outlet part 1012a are arranged on the two side wall parts oppositely arranged in the first direction respectively, Figure 2 In particular, the inlet part 1011a is arranged on the first side wall part 1011, and the outlet part 1012a is arranged on the second side wall part 1012. In this case, the inlet part 1011a and outlet part 1012a are also oppositely arranged. Obviously, the bed side wall part 101 is not limited to be square in structure, for example, it can be cylindrical. In this case, the inlet part 1011a and outlet part 1012a are oppositely arranged, and the inlet part 1011a and outlet part 1012a are distributed in the first direction and substantially distributed in the radial direction of the cylindrical shape, which is also a possible solution. It should be noted that the purpose of oppositely arranging the inlet part 1011a and outlet part 1012a is to enable the gas flow to flow from one side of the fluidized bed bed body 10 to the other side to produce coupling with the movement track of the filter material particles 801, which will be described in detail below.

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

[0057] As shown in Figure 3 and Figure 4 , the vibration mechanism 30 is connected with the fluidized bed bed body 10, so that the vibration mechanism 30 can drive the fluidized bed bed body 10 to vibrate in the vertical direction, that is, to vibrate vertically. Figure 3 is Figure 1 a structural schematic view of the vibration mechanism 30 in the embodiment; Figure 4 is a structural schematic view of another vibration mechanism 30 in the embodiment.

[0058] The vibration mechanism 30 in the embodiment can vibrate at a certain frequency and amplitude. Figure 3 In particular, 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 with the coil, and an excitation signal can be input into the coil to drive the workbench 301 connected with the coil to vibrate. Figure 1In this process, the workbench 301 is specifically connected to the fluidized bed body 10 via a support frame 40. The connection between the workbench 301 and the support frame 40 causes the support frame 40 to vibrate up and down. The fluidized bed body 10 is supported by the support frame 40 and thus vibrates in sync with the vibration of the support frame 40. The up and down direction mentioned in this text can be referred to as... Figure 1 understand, Figure 1 The vertical direction is defined by the orientation of the fluidized bed 10 during normal operation. It can be seen that the fluidized bed 10 can also be directly supported on the worktable 301. Here, a support frame 40 is set up to raise the fluidized bed 10 and leave space for the material cylinder 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 10 to drive the fluidized bed 10 to vibrate. The vibration mechanism 30 can also have other structural forms, which can be understood with reference to the existing technology and will not be described in detail here. As long as it can generate vibration, thereby driving the fluidized bed 10 to vibrate up and down, it is acceptable.

[0060] When the airflow containing dust enters the fluidized bed 10 from the inlet 1011a, it will flow through the filter media stack 80. The airflow filtered by the filter media stack 80 will flow out from the outlet 1012a, and the filtered dust will be retained in the filter media stack 80 of the fluidized bed 10. When a large amount of dust accumulates in the filter media pile 80, affecting the filtration effect, the vibration mechanism 30 can be activated. Since the particle size of the filter media particles 801 is larger than that of the dust particles, under the action of vibration, the smaller dust particles will gradually move downwards. That is, the dust and filter media particles 801 will experience the "Brazil fruit effect". The fine dust particles will enter the bottom wall 103 of the fluidized bed body 10. The bottom wall 103 of the bed body is provided with a discharge port 103a. A material cylinder 80 can be provided below the fluidized bed body 10. The material cylinder 80 and the discharge port 103a are connected, so the dust can fall from the discharge port 103a into the material cylinder 80, thereby allowing the filter media particles 801 in the fluidized bed body 10 to be renewed and recycled.

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

[0062] To verify the effectiveness of vibration in removing dust, particles of significantly different sizes can be uniformly filled into the fluidized bed 10 to simulate a dust-laden filter media pile 80, where the larger particles are filter media particles 801 and the smaller particles simulate dust. The vibration mechanism 30 is then activated, and the number of small particles (i.e., the amount of simulated dust) within the fluidized bed 10 is recorded over 40 seconds as the vibration time progresses. Figure 5 As shown, the number of small particles within the fluidized bed 10 decreases exponentially with vibration time, and the decay curve satisfies y=2029exp(-0.12t), where t is the horizontal axis time, with a confidence level of 95%. Within 40s, the number of small particles decreased from 2010 to 20, a decrease of 99.0%, demonstrating a significant effect. This indicates that the vibrating fluidized bed dust removal system has a self-cleaning function for the filter media particles 801.

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

[0064] At this point, you can refer to Figure 6 , Figure 6 For example, filter media particle 801 is a tracer in this application embodiment. Figure 6 A schematic diagram of the motion trajectory of the filter media particles marked in red at multiple moments.

[0065] Figure 6 The movement trajectories of the traced filter media particles 801 are displayed at 0s, 10s, 20s, 30s, and 40s after the start of vibration. One of the traced filter media particles 801 is selected from the second sidewall 1012 on the right side. It can be seen that the traced filter media particle 801 moves from right to left and then down to right to complete one cycle of unidirectional convection. That is, with the up-and-down vibration of the fluidized bed 10, the filter media particles 801 inside can undergo unidirectional convection. The direction of this unidirectional convection is opposite to the first direction. Figure 6 The fluidized bed 10 is inclined from left to right, and the filter media particles 801 move in a unidirectional circular motion from right to left. That is, the filter media particles 801 do not move in a straight line from right to left, but also include positional changes in the up and down direction. The movement trajectory is roughly circular. Figure 6 The specific experimental parameters are: vibration frequency of vibration mechanism 30 is 20Hz, and vibration amplitude is 2.48mm.

[0066] From a theoretical perspective, because the fluidized bed body 10 is inclined, Figure 1For the perspective, the fluidized bed bed body 10 is inclined from left to right, the first side wall part 1011 presses the filter material particles 801 close to the left side downward, and the second side wall part 1012 holds up the filter material particles 801 close to the right side upward. At this time, the resistance of the filter material particles 801 close to the first side wall part 1011 on the left side to the upward movement is greater than that of the filter material particles 801 close to the second side wall part 1012 on the right side, and correspondingly, the resistance of the filter material particles 801 close to the first side wall part 1011 on the left side to the downward movement is smaller than that of the filter material particles 801 close to the second side wall part 1012 on the right side.

[0067] Therefore, when the vibration mechanism 30 drives the fluidized bed bed body 10 to vibrate, the filter material particles 801 and the bed body side wall part 101 will collide. When the collision occurs, the first side wall part 1011 on the left side will promote the filter material particles 801 on the left side to move downward, and the second side wall part 1012 on the right side will promote the filter material particles 801 on the right side to move upward. Then, the filter material particles 801 on the left side moving downward gradually fill the space on the right side, and the filter material particles 801 on the right side move upward and to the left to the space on the left side. Therefore, a one-way convection of the filter material particles 801 falling along the wall surface of the first side wall part 1011 on the left side and rising along the wall surface of the second side wall part 1012 on the right side is formed. It can also be understood in combination with the arrows in Figure 1 Figure 6 The movement trajectory of the filter material particles 801 traced in

[0068] It can be seen that, in the embodiment, by means of the inclined arrangement of the bed body side wall part 101 of the fluidized bed bed body 10, the filter material particles 801 can realize one-way flow during vibration, thereby coupling with the flow of the gas flow. It can be understood in combination with Figure 1 that the bed body side wall part 101 is inclined along the first direction, Figure 1 the first direction in Figure 1 ​In the embodiment, the inlet part 1011a is on the left and the outlet part 1012 is on the right. The airflow enters from the left and flows out from the opposite right side. The dust in the airflow is prone to accumulate at the position of the filter material particles 801 on the left side, and 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 in unidirectional convection, the filter material particles 801 with low filtering utilization rate on the right side can be transferred to the position close to the airflow entering on the left side, that is, the filter material particles 801 covered with dust (of course, part of the dust will enter the bottom wall part 103 of the bed body downward when vibrating) are replaced by relatively clean filter material particles 801. It can be seen that the embodiment can transfer the filter material particles 801 with low filtering utilization rate on one side to the side with relatively high utilization rate of the filter material particles 801 on the main flow path of the airflow, thereby improving the utilization rate of the filter material particles 801 and the filtering efficiency, and enabling the vibration fluidized bed dust removal system to have a self-cleaning function.

[0069] It can be understood that the outlet part 1012a and the inlet part 1011a can also be sequentially distributed along the first direction, and the specific Figure 1 In the embodiment, the outlet part is on the left and the inlet part is on the right. In this way, more dust is accumulated on the right side, and the filter material particles 801 with high utilization rate on the left side can be updated to the right side when vibrating, so as to achieve the purpose of improving the utilization rate of the filter material particles 801 and the filtering efficiency.

[0070] It can be seen that the vibration fluidized bed dust removal system in the embodiment has a self-cleaning function, and the filtering effect on the dust-containing airflow is also better. The vibration system of the vibration fluidized bed is used, for example, to provide an airflow to a heat exchange device of an integrated heat storage system from a boiler flue gas, so as to facilitate the protection of the heat exchange device.

[0071] Please see Figure 7 , Figure 7 For Figure 1 The structure of the fluidized bed bed body 10 is shown in the embodiment.

[0072] Figure 7 The inclination angle β of the fluidized bed bed body 10 is shown in the embodiment, that is, the angle with the vertical direction. The size of the inclination angle β can be adjusted according to engineering requirements, so as to facilitate the replacement and utilization of the filter material particles 801 in unidirectional convection. The size of β is not specifically limited in the embodiment.

[0073] Please continue to refer to Figure 1The vibration fluidized bed dust removal system in the embodiment further comprises an inlet pipeline 60, which is communicated with the inlet part 1011a, that is, the airflow enters the inlet part 1011a from the inlet pipeline 60 and then enters the fluidized bed bed body 10. In addition, the inlet pipeline 60 is provided with at least two inlet parts 601, that is, the airflow entering the inlet pipeline 60 is a multi-path airflow, and the flow directions of the at least two inlet parts 601 have an included angle. The definition of the flow direction can be understood with reference to the flow directions of the inlet part 1011a and the outlet part 1012a described above. The flow directions of the at least two inlet parts 601 have an included angle, so that the at least two airflows enter the inlet pipeline 60 in different directions, which is beneficial to the sufficient mixing of the different airflows. For example, the multi-path airflows can be airflows with different temperatures, in detail, high-temperature dust-containing flue gas and low-temperature dust-containing flue gas can enter the inlet pipeline 60 to be mixed and then be filtered and dust removed in the fluidized bed bed body 10. At this time, at least one inlet part 601 of the inlet pipeline 60 can be communicated with a high-temperature flue gas pipeline, and at least one inlet part 601 can be communicated with a low-temperature flue gas pipeline, that is, the vibration fluidized bed dust removal system in the embodiment can not only filter and dust remove the airflow, but also mix different flue gas with different temperatures to form a mixed airflow with a required temperature, for example, can realize the uniform mixing of dust-containing flue gas with a large temperature difference.

[0074] In some specific embodiments, the inlet part 1011a can be provided with a first hole plate 120 to prevent the filter material particles 801 from entering the inlet pipeline 60. Figure 1 In the embodiment, the vibration fluidized bed dust removal system further comprises an outlet pipeline 90, and a second hole plate 130 can be arranged in the outlet pipeline 90 to prevent the filter material particles 801 from entering the outlet pipeline 90. The inlet pipeline 60 and the outlet pipeline 90 are beneficial to the connection with the input and output pipelines of the airflow.

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

[0076] Further, the inlet pipe 60 in the embodiment can be provided with a baffle 100, the baffle 100 is located downstream of all the inlet parts 601, that is, after the gas flow enters the inlet pipe 60 through the inlet part 601, the gas flow flows to the position of the baffle 100 downstream. When the gas flow carrying dust passes the position of the baffle 100, the flow direction of the gas flow changes, and the dust is intercepted at the position of the baffle 100, that is, the baffle 100 has the function of inertial dust removal, and the mixing effect can also be improved when the multiple gas flows are intercepted by the baffle 100. At this time, the baffle 100 has a through hole, that is, under the premise of intercepting dust, the baffle 100 ensures that the gas flow can continue to flow downstream. Of course, the baffle 100 can also be provided with a gap between the outer circumferential side of the baffle 100 and the pipe wall of the inlet pipe 60, as shown in Figure 1 , in this way, the gas flow can flow downstream from the gap, or through the hole and the gap.

[0077] In addition, as shown in Figure 1 , the inlet pipe 60 in the embodiment can be inclined relative to the horizontal direction, and the inclination angle is α. The inclination angle α can be greater than the rest angle of the dust, so that the dust collected in the inlet pipe 60 can automatically fall into the fluidized bed body 10 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 into the cylinder 70 when vibrating.

[0078] Please continue to refer to Figure 8 and Figure 9 , Figure 8 is a temperature cloud chart of the gas flow through the dust removal system of the vibrating fluidized bed in the embodiment, in which one low-temperature dust-containing flue gas flow enters from the two sides of the pipe side wall part of the inlet pipe 60, the temperature is 500℃, and one high-temperature dust-containing flue gas flow enters from the first port part of the inlet pipe 60, the temperature is 700℃, and there are three gas flows in total. Figure 9 is a temperature cloud chart of the direct mixing of two dust-containing flue gas flows in a traditional way.

[0079] Figure 8 , 9The temperature difference of the mixed gas flow is 200 DEG C. It can be seen that, under the traditional mixing mode, there is still a large temperature difference of the gas flow at the outlet part 1012a, and the maximum temperature difference reaches 107.6 DEG C. Under the mixing mode in the embodiment, the maximum temperature difference of the gas flow at the outlet part 1012a is obviously reduced, and the specific value is only 2.6 DEG C. It can be seen that the vibration fluidized bed dust removal system in the embodiment is beneficial to realize the large temperature difference mixing of the dust-containing gas flow.

[0080] On the one hand, the gas flow can be mixed once by the introduction of different flow directions when entering the inlet pipe 60. On the other hand, the baffle 100 can rectify the large temperature difference dust-containing gas flow after the preliminary mixing. In addition, the filter material pile 80 has the porous characteristics, which can promote the mutual movement between the large temperature difference dust-containing fluids. The above-mentioned aspects are cooperated with each other to realize the uniform mixing of the large temperature difference gas flow. It can be seen that the vibration fluidized bed dust removal system has the advantages of wide filtering temperature zone, small fluid temperature drop and wide adaptability. It can be understood that even if there is no inlet part 601 with different gas inlet angles or no baffle 100 is arranged, the porous characteristics of the filter material pile 80 itself can also promote the mixing of the gas flow.

[0081] Still 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 gas is usually extracted for mixing, and the mixed flue gas is input into the integrated heat storage system for energy storage. When the high-temperature and low-temperature flue gas is simultaneously transported to the gas supply flue of the integrated heat storage system according to the traditional mixing mode, the flue gas is mixed by convection and diffusion. This kind of mixing mode has a long flue, and also has a poor dust removal effect and a non-uniform mixed flue gas temperature. The uniformity of the mixed flue gas temperature is of great significance to the safe and stable operation of the heat exchange equipment. The vibration fluidized bed dust removal system in the embodiment can better realize the mixing of the multi-path gas flow, and the mixed flue gas temperature is relatively uniform, which is beneficial to ensure the safe and stable operation of the heat exchange equipment. Figure 9

[0082] Again, referring to FIG. 1, the vibration fluidized bed dust removal system in the embodiment can realize the mixing of the multi-path gas flow, and the mixed flue gas temperature is relatively uniform, which is beneficial to ensure the safe and stable operation of the heat exchange equipment. Figure 10 , Figure 10 For Figure 7 A top view of the bed bottom wall part 103 of the fluidized bed bed body 10.

[0083] ​The fluidized bed body 10 further comprises a bottom wall part 103 of the bed body, the bottom wall part 103 of the bed body has a discharge port 103a, the bottom wall part 103 of the bed body in the embodiment is a grid structure, has a plurality of grid ports, the grid port is the discharge port 103a, the grid structure is beneficial to form a plurality of discharge ports 103a and is beneficial to the falling of dust, it can be known that it is not limited to the grid structure, for example, a perforated plate and the like. In addition, the upper surface of the bottom wall part 103 of the bed body is gradually inclined upward from one end close to the inlet part 1011a to the opposite end. The inclined arrangement facilitates the dust falling to the bottom to fall more smoothly from the discharge port 103a of the bottom wall part 103 of the bed body. As described previously, the dust on the side of the inlet part 1011a is more, and the inclination direction of the upper surface of the bottom wall part 103 of the bed body is gradually inclined from one end close to the inlet part 1011a to the other end, which is more beneficial to the falling of dust. The inclination direction and angle γ of the upper surface of the bottom wall part 103 of the bed body can be adjusted according to engineering requirements. As shown in Figure 10 When the bottom wall part 103 of the bed body is a grid structure, the parallel spacing of adjacent grid ports is L, the spacing L can be set to be less than the diameter D of the filter material particles 801, but greater than the diameter d of the dust particles, that is, the filter material particles 801 will not leak out of the discharge port 103a, and the dust can be discharged from the discharge port 103a. Here, only the upper surface of the bottom wall part 103 of the bed body is inclined, and the lower surface is a horizontal plane, so that the bottom wall part 103 of the bed body is actually designed to be of unequal thickness, which is beneficial to ensure the bearing strength. Of course, the entire bottom wall part 103 of the bed body can also be inclined.

[0084] The vibration fluidized bed dust removal system in the embodiment further comprises 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 signal connected with the control unit 50. The first pressure detection element 201 is used for detecting the inlet pressure Pin of the inlet part 1011a, and the second detection element 202 is used for detecting the outlet pressure Pout of the outlet part 1012a, that is, the pressure detection elements are arranged at the inlet part 1011a and the outlet part 1012a respectively. In this way, the first pressure detection element 201, the second pressure detection element 202 and the control unit 50 are signal connected, the detected pressure signals 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 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 in the fluidized bed bed body 10 is too high, which causes the resistance to be large, so the pressure drop is large, then the control unit 50 can control the vibration mechanism 30 to start, so as to drive the fluidized bed bed body 10 to vibrate, and the filtered dust is vibrated to fall into the cylinder 70, then the resistance of the filter material pile 80 is reduced, and the pressure difference ΔP of the inlet pressure Pin and the outlet pressure Pout is reduced, that is, the pressure difference ΔP is smaller than the second preset value ΔP0 (the second preset value ΔP0 is smaller than the first preset value ΔP0), then the vibration mechanism 30 can be controlled to stop vibrating. In this way, the vibration mechanism 30 is an intelligent intermittent working, which has the advantages of low investment cost and low running energy consumption.

[0085] As shown in Figure 1 The cylinder 70 in the embodiment has a discharge outlet part, the discharge outlet part is provided with a control valve 110, when the control valve 110 of the discharge outlet part is opened, the dust collected in the cylinder 70 can be discharged. At this time, the vibration fluidized bed dust removal system further comprises a third pressure detection element 203, the cylinder 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 signal connected with the control unit 50. Then the pressure detected by the third pressure detection element 203 can reflect the total mass of the cylinder 70 and the dust inside it, the mass of the cylinder 70 itself is known, so the mass of the dust in the cylinder 70 can be fed back, according to the characteristics of the dust, the density and other parameters of the dust can be obtained, and the volume of the dust can also be detected, that is, the amount of dust in the cylinder 70 can be known, and then it can be judged whether the cylinder 70 is full of dust or reaches the preset height, that is, whether it needs to be discharged, if it needs to be discharged, the control unit 50 can control the control valve 110 to open, so as to discharge the dust, and the cylinder 70 can continue to store the material.

[0086] Figure 1In the embodiment, the vibrating mechanism 30 is connected to the fluidized bed body 10 through the support frame 40, and the third pressure detecting element 203 can be arranged between the support frame 40 and the vibrating mechanism 30, i.e. the third pressure detecting element 203 indirectly supports the material cylinder 70. The mass obtained by the third pressure detecting element 203 detecting pressure is the total mass m of the support frame 40, the fluidized bed body 10 and the filter material pile 80 thereof, and the material cylinder 70 and the dust thereof. Except the dust mass, the rest mass is known, and the dust mass can be calculated. A preset value m0 of the total mass can also be set, and if the detected total mass m is greater than the preset value m0, it indicates that the dust mass is high, and the control valve 110 can be opened to discharge the material.

[0087] The above is only the preferred embodiment of the present application, and it should be pointed out that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A vibrated fluidized bed dust removal system characterized in that, The vibration fluidized bed dust removal system comprises a fluidized bed body (10) for loading filter material particles (801), wherein the fluidized bed body (10) has a cylindrical bed body side wall part (101) which is arranged in a first direction relative to the vertical direction; the bed body side wall part (101) is provided with an inlet part (1011a) and an outlet part (1012a), which are arranged in sequence along the first direction or the outlet part (1012a) and the inlet part (1011a) are arranged in sequence along the first direction. The vibration fluidized bed dust removal system further comprises a vibration mechanism (30) connected with the fluidized bed body (10).

2. The vibrated fluidized bed dust collection system of claim 1, wherein, The vibration fluidized bed dust removal system further comprises an inlet pipeline (60) connected with the inlet part (1011a); the inlet pipeline (60) is provided with at least two inlet parts (601), and the flow directions of the at least two inlet parts (601) have an included angle.

3. The vibrated fluidized bed dust collection system of claim 2, wherein, The inlet pipeline (60) has relatively distributed first and second port parts, the first port part is one of the inlet parts (601), and the second port part is connected with the inlet part (1011a). The inlet pipeline (60) has a pipeline side wall part provided with at least one of the inlet parts (601).

4. A vibrating fluid bed dust removal system according to claim 2 or 3, characterised in that, The inlet pipeline (60) is provided with a baffle (100) located downstream of all the inlet parts (601). The baffle (100) has a through hole, and / or at least part of the outer circumferential side of the baffle (100) has a gap with the pipe wall of the inlet pipeline (60).

5. The vibrated fluidized bed dust collection system of claim 4, wherein, The inlet pipeline (60) is arranged in an inclined manner relative to the horizontal direction.

6. A vibrating fluid bed dust removal system according to claim 2 or 3, characterised in that, At least one of the inlet parts (601) of the inlet pipeline (60) is connected with a high-temperature flue gas pipeline, and at least one of the inlet parts (601) is connected with a low-temperature flue gas pipeline.

7. The vibrated fluidized bed dust collection system of claim 1, wherein, The fluidized bed body has a square structure, and the bed body side wall part (101) comprises two side wall parts arranged in opposite directions along the first direction, the inlet part (1011a) is arranged on one of the side wall parts, and the outlet part (1012a) is arranged on the other side wall part.

8. The vibrated fluidized bed dust removal system according to any one of claims 1 to 3, 7, characterized in that The fluidized bed body (10) further comprises a bed body bottom wall part (103), and an upper surface of the bed body bottom wall part (103) is arranged in a gradually upward inclined manner from one end close to the inlet part (1011a) to the other end.

9. The vibrated fluidized bed dust removal system according to any of claims 1-3, 7, characterized in that, The vibration fluidized bed dust removal 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 for detecting the inlet pressure of the inlet part (1011a), and the second pressure detection element (202) is used for detecting the outlet pressure of the outlet part (1012a). The first pressure detecting element (201), the second pressure detecting element (202) and the vibration mechanism (30) are in signal connection with the control unit (50).

10. The vibrated fluidized bed dust collection system of any of claims 1-3, 7, wherein, The bed bottom wall part (103) of the fluidized bed bed body (10) is provided with a discharge port (103a), and the vibration fluidized bed dust removal system further comprises a material cylinder (70), which is located below the fluidized bed bed body (10), and the discharge port (103a) and the material cylinder (70) are in communication; the material cylinder (70) has a discharge port part, and the discharge port part is provided with a control valve (110); The vibration fluidized bed dust removal system further comprises a control unit (50) and a third pressure detecting element (203), and the material cylinder (70) is directly or indirectly supported on the third pressure detecting element (203); the third pressure detecting element (203) and the control valve (110) are in signal connection with the control unit (50).

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

12. The vibrated fluidized bed dust removal method according to claim 11, characterized by detecting the amount of dust in the material cylinder (70) which is in communication with the discharge port (103a) of the fluidized bed bed body (10), and controlling the material cylinder (70) to discharge material according to the amount of dust. detecting the inlet pressure of the inlet part (1011a) and the outlet pressure of the outlet part (1012a) to obtain a pressure difference;

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