Fluidized particle size control system

Abstract

The application discloses a fluidized particle size control system and belongs to the technical field of fluidized solid particle medium heat storage control. The system comprises a feeding unit, a heating chamber and a plurality of vibrating screens and a control unit connected in parallel between the feeding unit and the heating chamber. The feeding unit is used for fluidizing raw materials and conveying the fluidized raw materials. The plurality of vibrating screens and the control unit are used for vibrating and screening the fluidized raw materials conveyed by the feeding unit, fluidizing qualified materials of different particle size standards screened out, and controlling the fluidized qualified materials of different particle size standards to enter the heating chamber at a set proportion. The application can realize parallel sorting and accurate proportioning of multiple particle sizes, control the conveying amount of solid particles, improve the energy storage efficiency, and reduce equipment wear and tear.

Description

Technical Field

[0001] This invention relates to the field of fluidized solid particulate thermal storage technology, and in particular to a fluidized particle size control system. Background Technology

[0002] Currently, in the field of fluidized bed solid particle thermal storage technology, the heating chamber is particularly sensitive to the particle size of the solid particles. Taking sand thermal storage systems as an example, the sand particle size directly affects the efficiency of the entire system. If the sand particle size is too large, the specific surface area decreases, reducing the heat absorption of the thermal storage system and affecting its heat release rate. If the sand particle size is too small, the particles are easily carried away by the airflow prematurely, leading to the loss of the thermal storage medium, affecting the circulation rate of the thermal storage system, and thus impacting the overall thermal efficiency. The particle size of solid particles directly affects the material concentration and circulation rate of the thermal storage system, thereby altering its efficiency. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, one objective of this invention is to propose a fluidized particle size control system that can achieve parallel sorting and precise proportioning of multiple particle sizes, control the amount of solid particles conveyed, improve energy storage efficiency, and reduce equipment wear.

[0004] According to an embodiment of the present invention, a fluidized particle size control system includes: a feeding unit, a heating chamber, and a multi-channel vibrating screen and control unit connected in parallel between the feeding unit and the heating chamber; The feeding unit is used to fluidize the raw materials and transport the fluidized raw materials. The multi-channel vibrating screen and control unit are used to vibrate and screen the fluidized raw materials delivered by the feeding unit, and to fluidize the qualified materials of different particle size standards that are screened out, and to control the qualified fluidized materials of different particle size standards to enter the heating chamber in a set proportion.

[0005] The fluidized particle size control system of this invention has the following advantages: First, parallel sorting of multiple particle sizes: Through multiple vibrating screens and control units set in parallel, solid particles can be simultaneously screened according to multiple particle size standards, replacing the limitations of traditional single screens and achieving efficient grading of qualified materials of different particle sizes. Second, precise proportioning of multiple particle sizes entering the heating chamber: Each of the multiple vibrating screens and control units can independently adjust the conveying amount of qualified materials screened by itself, ensuring that they enter the heating chamber according to a preset ratio. Third, full-process fluidization: The feeding unit, vibrating screens and control units, and heating chamber work together to maintain the continuous fluidization state of the material, avoiding particle accumulation and blockage, improving the stability and continuity of system operation, increasing energy storage efficiency, and reducing equipment wear.

[0006] This invention is based on fluidized particle size control. It sieves and distributes solid particle raw materials of fluidized medium particle size, which can control the heating state and circulation number of fluidized solid particle medium, and can be used for fluidized medium thermal storage technology.

[0007] In some embodiments, the feeding unit includes a feeding blower, a feeding pipeline, and a raw material bin. The feeding blower is connected to one end of the feeding pipeline, and the other end of the feeding pipeline is connected to the multi-channel vibrating screen and control unit. The raw material bin is connected to the feeding pipeline.

[0008] In some embodiments, the raw material silo is located above the feeding pipeline, the bottom of the raw material silo is connected to the feeding pipeline through a silo pipeline, and a feeding control valve is provided at the bottom of the raw material silo or on the silo pipeline.

[0009] In some embodiments, each of the vibrating screen and control units includes a branch pipe, a vibrating screen, a fluidizing fan, and a flow control valve. The branch pipe is connected between the other end of the feeding pipe and the heating chamber. The vibrating screen and the flow control valve are disposed on the branch pipe, with the flow control valve located between the vibrating screen and the heating chamber. The fluidizing fan is connected to the vibrating screen. The screen apertures of the vibrating screens in the multiple vibrating screen and control units are different from each other.

[0010] In some embodiments, each of the vibrating screens and control units further includes a transition hopper, which is disposed on the branch pipeline and located between the vibrating screen and the flow control valve.

[0011] In some embodiments, the flow control valves control the flow of qualified material of corresponding particle size standards into the heating chamber by controlling their respective rotation speed and number of rotations.

[0012] In some embodiments, the system further includes a host computer that controls the rotational speed and number of revolutions of the flow control valve.

[0013] In some embodiments, the other end of the branch pipes of the multiple vibrating screens and control units is connected to the heating chamber via a main pipe.

[0014] In some embodiments, each of the vibrating screens and control units further includes a waste bin, which is connected to the vibrating screen and is used to store materials that do not meet the particle size standard after being screened by the vibrating screen.

[0015] In some embodiments, the heating chamber is an electric heating furnace.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the fluidized particle size control system according to an embodiment of the present invention.

[0018] Figure Labels Fluidized particle size control system 1000; feeding unit 1; feeding blower 101; feeding pipeline 102; raw material silo 103; feeding control valve 104; heating chamber 2; multi-channel vibrating screen and control unit 3; branch pipeline 301; vibrating screen 302; fluidizing blower 303; flow control valve 304; transition silo 305; residual silo 306; host computer 4; main pipeline 5. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] The following is combined with Figure 1 This invention describes a fluidized particle size control system 1000 according to an embodiment of the present invention.

[0021] like Figure 1 As shown, the fluidized particle size control system 1000 of this embodiment includes a feeding unit 1, a heating chamber 2, and a multi-channel vibrating screen and control unit 3 connected in parallel between the feeding unit 1 and the heating chamber 2.

[0022] The feeding unit 1 is used to fluidize the raw materials and transport the fluidized raw materials. Specifically, the feeding unit 1 uses air force to suspend and uniformly mix the solid particulate raw materials to form a fluidized state, and then feeds the fluidized raw materials to the multi-channel vibrating screen and control unit 3.

[0023] The multi-channel vibrating screen and control unit 3 is used to vibrate and screen the fluidized raw materials conveyed by the feeding unit 1, and to fluidize the qualified materials of different particle sizes screened out, controlling the fluidized qualified materials of different particle sizes to enter the heating chamber 2 in a set proportion. Specifically, the multi-channel vibrating screen and control unit 3 can be set with two or more channels as needed, for example... Figure 1 The diagram illustrates a three-channel vibrating screen and control unit 3. The three channels of the vibrating screen and control unit 3 have different standards for the particle size of the fluidized raw material being screened, such as... Figure 1 The qualified material screened out by the uppermost vibrating screen and control unit 3 is coarse-diameter particles. Figure 1 The qualified material screened out by the middle vibrating screen and control unit 3 is medium-sized particles. Figure 1The lowest-level vibrating screen and control unit 3 outputs fine-diameter particles as the qualified material. In other words, the qualified material output by each of the multiple vibrating screens and control units 3 has a different particle size standard, enabling parallel sorting of multiple particle sizes. The qualified material output by each of the multiple vibrating screens and control units 3 remains fluidized under the action of airflow, preventing accumulation and blockage, and ensuring smooth transport of the fluidized raw materials. Simultaneously, each of the multiple vibrating screens and control units 3 controls the amount of fluidized qualified material of different particle size standards entering the heating chamber according to a set ratio. For example… Figure 1 The three-channel vibrating screen and control unit 3 feeds coarse, medium, and fine particles into the heating chamber in a set ratio of 1:6:3, thereby achieving precise proportioning of multiple particle sizes, improving energy storage efficiency while reducing equipment wear. The heating chamber 2 receives the graded and proportionally mixed fluidized qualified material from the multi-channel vibrating screen and control unit 3, and completes the fluidized heating process inside.

[0024] The fluidized particle size control system 1000 of this invention has the following advantages: First, parallel sorting of multiple particle sizes: Through the parallel arrangement of multiple vibrating screens and control units 3, solid particles can be simultaneously screened according to multiple particle size standards, replacing the limitations of traditional single screens and achieving efficient grading of qualified materials of different particle sizes. Second, precise proportioning of multiple particle sizes entering the heating chamber: Each of the multiple vibrating screens and control units 3 can independently adjust the conveying amount of qualified materials screened by itself, ensuring that they enter the heating chamber according to a preset ratio. Third, full-process fluidization: The feeding unit 1, vibrating screens and control units 3, and heating chamber 2 work together to maintain the continuous fluidization state of the material, avoiding particle accumulation and blockage, improving the stability and continuity of system operation, increasing energy storage efficiency, and reducing equipment wear.

[0025] This invention is based on fluidized particle size control. It sieves and distributes solid particle raw materials of fluidized medium particle size, which can control the heating state and circulation number of fluidized solid particle medium, and can be used for fluidized medium thermal storage technology.

[0026] In some embodiments, the feeding unit 1 includes a feeding blower 101, a feeding pipeline 102, and a raw material silo 103. The feeding blower 101 is connected to one end of the feeding pipeline 102, and the other end of the feeding pipeline 102 is connected to the multi-channel vibrating screen and control unit 3. The raw material silo 103 is connected to the feeding pipeline 102. The raw material silo 103 stores solid particle raw materials and continuously supplies raw materials to the feeding pipeline 102. The feeding blower 101 provides pneumatic conveying air to the raw materials in the feeding pipeline 102, fluidizing the raw materials entering the feeding pipeline 102 from the raw material silo 103. Simultaneously, the fluidized raw materials are conveyed to the multi-channel vibrating screen and control unit 3, resulting in high transportation efficiency.

[0027] In some embodiments, the raw material silo 103 is located above the feeding pipeline 102, and the bottom of the raw material silo 103 is connected to the feeding pipeline 102 via a silo pipeline. A feeding control valve 104 is provided at the bottom of the raw material silo 103 or on the silo pipeline. With the raw material silo 103 installed above the feeding pipeline 102, when the control valve 104 is opened, the raw material in the raw material silo 103 automatically falls into the feeding pipeline 102 by its own gravity. Through the airflow provided by the feeding fan 101, fluidized conveying is achieved, and the material is simultaneously conveyed to the multi-channel vibrating screen and control unit 3, resulting in high transportation efficiency.

[0028] In some embodiments, each vibrating screen and control unit 3 includes a branch pipe 301, a vibrating screen 302, a fluidizing blower 303, and a flow control valve 304. The branch pipe 301 is connected between the other end of the feeding pipe 102 and the heating chamber 2, that is, one end of the branch pipe 301 is connected to the other end of the feeding pipe 102, and the other end of the branch pipe 301 is connected to the heating chamber 2. The vibrating screen 302 and the flow control valve 304 are disposed on the branch pipe 301, and the flow control valve 304 is located between the vibrating screen 302 and the heating chamber 2. The fluidizing blower 303 is connected to the vibrating screen 302. The screen apertures of the vibrating screens 302 in the multi-channel vibrating screen and control unit 3 are different from each other. The other end of the feeding pipe 102 is connected to the branch pipes 301 of the multi-channel vibrating screen and control unit 3, allowing the fluidized raw material from the feeding pipe 102 to enter the branch pipes 301 of the multi-channel vibrating screen and control unit 3 in parallel and then enter the vibrating screen 302 for screening. Since the sieve apertures of the vibrating screens 302 in the multi-channel vibrating screen and control unit 3 are different, it can screen qualified materials of different particle sizes, for example... Figure 1 The three vibrating screens 302 shown have different screen apertures to screen the raw materials by particle size. For example, one screen can screen small particles (0.1mm screen size), another can screen medium particles (1mm screen size), and another can screen large particles (4mm screen size) to meet the different particle size requirements of the heating chamber 2. A fluidizing fan 303 provides secondary fluidization to the raw materials within the vibrating screens 302, preventing particles from clogging the screen apertures and making screening more efficient. It also facilitates the flow of qualified material downstream to the heating chamber via branch pipes in a fluidized state. A flow control valve 304 can precisely control the flow rate of qualified raw materials entering the heating chamber according to a set ratio.

[0029] In some embodiments, each vibrating screen and control unit 3 further includes a transition hopper 305, which is disposed on the branch pipe 301 and located between the vibrating screen 302 and the flow control valve 304. The transition hopper 305 mainly serves to reserve a portion of solid particles, preventing the presence of too much qualified solid particle material, thus stabilizing the material flow before the flow control valve 304 and accurately controlling the flow rate into the heating chamber 2.

[0030] In some embodiments, the flow control valve 304 controls the entry of qualified material of corresponding particle size standards into the heating chamber 2 by controlling its respective rotation speed and number of revolutions. Since the flowability of solid particles of different sizes varies, the revolutions-mass flow rate relationship of each valve needs to be pre-calibrated based on the measured characteristics of the solid particles. Figure 1 For three types of qualified materials with medium, coarse, medium and fine particle sizes, assuming that the material types are the same and the flowability is similar, if the mass ratio of them entering the heating chamber 2 is required to be 1:6:3, the rotation number of the three flow control valves 304 can be set in a ratio of 1:6:3 based on the calibrated number of rotations-mass flow rate curve to achieve an approximately proportional flow ratio.

[0031] In some embodiments, a host computer 4 is also included, which controls the rotation speed and number of revolutions of the flow control valve 304. For example, when it is necessary for qualified materials of different particle sizes to enter the heating chamber 2 in a certain proportion, the host computer 4 can set the rotation speed parameters and number of revolutions parameters of each flow control valve 304 to achieve precise control of the proportion of qualified materials of different particle size standards. This enables unmanned and precise quantity control.

[0032] In some embodiments, the other end of the branch pipe 301 of the multi-channel vibrating screen and control unit 3 is connected to the heating chamber 2 via the main pipe 5. In this way, qualified materials of different particle size standards are premixed before entering the heating chamber 2.

[0033] In some embodiments, each vibrating screen and control unit 3 further includes a waste material bin 306, which is connected to the vibrating screen 302 and is used to store non-conforming materials that do not meet the particle size standards after being screened by the vibrating screen 302. This prevents non-conforming materials from entering the heating chamber 2 and reduces wear on subsequent equipment; non-conforming materials can be centrally recycled and reprocessed, which is more environmentally friendly.

[0034] In some embodiments, the heating chamber 2 is an electric heating furnace, but it is not limited to this. The electric heating furnace receives fluidized qualified material with graded particle size and proportionally mixed from the multi-channel vibrating screen and control unit 3 to complete the fluidized heating process.

[0035] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fluidized bed particle size control system, characterized in that, include: A feeding unit, a heating chamber, and a multi-channel vibrating screen and control unit connected in parallel between the feeding unit and the heating chamber; The feeding unit is used to fluidize the raw materials and transport the fluidized raw materials. The multi-channel vibrating screen and control unit are used to vibrate and screen the fluidized raw materials delivered by the feeding unit, and to fluidize the qualified materials of different particle size standards that are screened out, and to control the qualified fluidized materials of different particle size standards to enter the heating chamber in a set proportion.

2. The fluidized particle size control system according to claim 1, characterized in that, The feeding unit includes a feeding blower, a feeding pipeline, and a raw material bin. The feeding blower is connected to one end of the feeding pipeline, and the other end of the feeding pipeline is connected to the multi-channel vibrating screen and control unit. The raw material bin is connected to the feeding pipeline.

3. The fluidized particle size control system according to claim 2, characterized in that, The raw material silo is located above the feeding pipeline, and the bottom of the raw material silo is connected to the feeding pipeline through a silo pipeline. A feeding control valve is provided at the bottom of the raw material silo or on the silo pipeline.

4. The fluidized particle size control system according to claim 2, characterized in that, Each of the vibrating screens and control units includes a branch pipe, a vibrating screen, a fluidizing blower, and a flow control valve. The branch pipe is connected between the other end of the feeding pipe and the heating chamber. The vibrating screen and the flow control valve are located on the branch pipe, with the flow control valve located between the vibrating screen and the heating chamber. The fluidizing blower is connected to the vibrating screen. The screen apertures of the vibrating screens in the multiple vibrating screens and control units are different from each other.

5. The fluidized particle size control system according to claim 4, characterized in that, Each of the vibrating screens and control units also includes a transition hopper, which is located on the branch pipeline and between the vibrating screen and the flow control valve.

6. The fluidized particle size control system according to claim 4, characterized in that, The flow control valves control the flow of qualified materials of corresponding particle size standards into the heating chamber by controlling their respective rotation speed and number of rotations.

7. The fluidized particle size control system according to claim 6, characterized in that, It also includes a host computer, which controls the rotation speed and number of revolutions of the flow control valve.

8. The fluidized particle size control system according to claim 4, characterized in that, The other end of the branch pipe of the multi-channel vibrating screen and control unit is connected to the heating chamber through a main pipe.

9. The fluidized particle size control system according to claim 4, characterized in that, Each of the vibrating screens and control units also includes a waste bin, which is connected to the vibrating screen and is used to store materials that do not meet the particle size standard after being screened by the vibrating screen.

10. The fluidized particle size control system according to any one of claims 1-9, characterized in that, The heating chamber is an electric heating furnace.

Images