A fluidized conveying method and system for bulk materials

Abstract

The present invention relates to the field of operation and transportation, and provides a fluidized conveying method and system for bulk materials. The fluidized conveying system for bulk materials includes a feeding device, a conveying device, an air source device and a weighing device. The feeding device includes a storage bin and a conveying pump. The conveying pump is provided with a dwelling pipe, the dwelling pipe is provided with a push rod and a power unit, and the dwelling pipe is provided with a first material speed meter; the conveying device is provided with a conveying pipeline, and the air source device includes a conveying air circuit, a discharge air circuit and a jet air circuit. The jet air circuit is started to impact the bulk material so that the bulk material enters the conveying pipeline. When the bulk material is disturbed, the discharge air circuit continuously provides airflow to convey the bulk material into the conveying pipeline for fluidized conveying. If the jet air circuit cannot be pushed, a push rod is used for physical disturbance. In this way, the bulk material entering the conveying pipeline is fluidized and conveyed by high-pressure airflow, so as to achieve the purpose of efficient conveying.

Description

Technical Field

[0001] The invention relates to the field of operation and transportation, and in particular to a fluidized conveying method and system for bulk materials. Background Art

[0002] Pneumatic conveying, also known as air flow conveying, uses the energy of air flow to convey granular materials in the direction of air flow in a closed pipe. It is a specific application of fluidization technology. The pneumatic conveying device has a simple structure and is easy to operate. It can be used for horizontal, vertical or inclined conveying. During the conveying process, it can also perform physical operations such as heating, cooling, drying and air flow classification of materials or certain chemical operations.

[0003] In the transportation of bulk materials, the existing technologies and solutions are still being explored and improved. The difficulties include: 1. Bulk materials have good static stability, and the initial difficulty of converting the static stacking state into a dynamic state is high. 2. Bulk materials are usually irregular, such as large pieces of gravel, etc. These materials easily form a stable bridging state in the container. 3. In the process of static to dynamic conversion of bulk materials, it is difficult to control the conversion speed, that is, it is difficult to achieve a controllable discharge rate; 4. When there is a need to control the amount of process materials, how to use intermittent equipment to measure the amount of bulk reaction, the purpose of controlling the conveying amount cannot be achieved through the existing equipment, resulting in the difficulty of stably or controllably conveying bulk materials during fluidized conveying. Summary of the invention

[0004] The object of the present invention is to provide a fluidized conveying method for bulk materials, aiming to improve the problem of poor conveying stability or controllability of existing bulk materials during fluidized conveying.

[0005] To achieve the above object, the present invention adopts the following technical solution: a fluidized conveying method for bulk materials, comprising the following steps: Filling bulk materials into the retention pipe; Open the conveying gas path and monitor whether the pressure fluctuation range in the pipeline meets the discharge requirements. If not, continue monitoring. If so, open the discharge gas path and monitor whether there is feedback information on the movement of bulk materials. If there is no signal feedback, the jet gas circuit is started to perform high-pressure jetting on the bulk materials in the retention pipe; if there is still no signal feedback, the push rod is started to physically disturb the bulk materials in the retention pipe; If signal feedback is obtained after high-pressure jetting, or signal feedback is obtained through physical disturbance of the push rod, it is judged that the material has entered the conveying pipeline, and high-pressure gas is continuously conveyed through the conveying gas path to fluidize and convey the bulk material; Determine whether the weight of the conveying pump is within the net weight range of the empty pump. If it is greater than the net weight range, the conveying state of the bulk material is maintained; if it is within the net weight range and the push rod moves to the end point, the conveying is completed and the machine is shut down or switched to continuous cycle conveying.

[0006] Preferably, after the current conveying is completed, the velocity value of the fluidized conveying of the bulk material detected in the conveying pipeline is collected, and the minimum velocity value obtained is compared with the set conveying velocity of the bulk material. If the minimum velocity value is greater than the set conveying velocity value, the gas volume value in the next discharge gas path is adjusted according to the minimum velocity value. If the minimum speed value is less than or equal to the set conveying speed value, the conveying parameters of the discharge gas path remain unchanged.

[0007] Preferably, when the push rod is in the process of physical disturbance and there is no signal feedback after the set time, the jet gas path performs a high-pressure jet when each set time is reached.

[0008] Preferably, the length parameter value X, the width parameter value Y and the height parameter value Z of the material in three-dimensional space, as well as the diameter value R1 of the retention pipe and the diameter value R2 of the delivery pipe are obtained; Then: R1>R2, X+Y+Z≤2×R2, R1≥3×(X+Y+Z); And the maximum value among X, Y and Z is less than the value of 0.8×R2.

[0009] Preferably, the length between the starting point and the end point of the push rod moving in the stay pipe is L; Select the maximum value Q among X, Y and Z, then: L=Q×(1+cotα), where α is the stacking angle of the bulk material.

[0010] The object of the present invention is to provide a fluidized conveying system for bulk materials, aiming to improve the problem of poor conveying stability or controllability of existing bulk materials during fluidized conveying.

[0011] To achieve the above object, the present invention adopts the following technical solution: a fluidized conveying system for bulk materials, which is used to perform the above-mentioned fluidized conveying method for bulk materials, comprising: A feeding device, comprising a storage bin and a delivery pump arranged at the outlet end of the storage bin, wherein the effective volume of the storage bin is greater than the effective volume of the delivery pump (effective volume ratio 1:0.85); a retention pipe is arranged at the output port of the delivery pump, a push rod and a power unit for driving the push rod to move are arranged on the retention pipe, one end of the push rod is arranged in the retention pipe; a first material speed meter is arranged on the retention pipe; A conveying device, wherein a conveying pipeline is arranged between the conveying device and the staying pipeline, and a diameter-changing pipeline is arranged between the conveying pipeline and the staying pipeline; An air source device, comprising a conveying air path for providing airflow to the conveying pipeline, and a discharge air path and an air jet air path with output ends arranged in the staying pipeline; and A weighing device, wherein the delivery pump is arranged on the weighing device.

[0012] Preferably, the push rod is provided with an inner tube penetrating the push rod, the inner tube is provided with a first air supply pipe connected to the jet air path and a second air supply pipe connected to the discharge air path, and the first air supply pipe is provided with a pulse valve.

[0013] Preferably, the conveying pipeline is provided with a pressure meter, an air flow meter and a second material velocity meter.

[0014] Preferably, a horizontal pipe section is provided at the end section of the retention pipe, a sealing connecting pipe is provided on the pipe wall opposite to the outlet direction of the horizontal pipe section, and the middle sliding seal of the push rod is provided in the sealing connecting pipe.

[0015] Preferably, the diameter of the dwelling pipe is greater than the diameter of the conveying pipe, the length of the variable diameter pipe is the difference between the diameter of the dwelling pipe and the diameter of the conveying pipe, and the variable diameter pipe is installed at an angle.

[0016] After adopting the above technical solution, the present invention has the following advantages compared with the background technology: 1. Start the jet gas circuit to impact the bulk material, so that the bulk material enters the conveying pipeline. When the bulk material is disturbed, the discharge gas circuit continuously provides airflow to transport the bulk material to the conveying pipeline for fluidized transportation. If the jet gas circuit cannot push, use a push rod to perform physical disturbance to form a relatively accurate control of the initial speed of the bulk material, and at the same time solve the problem of bridging between bulk materials. In this way, the bulk material entering the conveying pipeline is fluidized and transported by high-pressure airflow, achieving the purpose of efficient transportation.

[0017] 2. When the material enters the retention pipe, it is transported by the delivery pump. By controlling the valve on the delivery pump, the feeding amount can be controlled. And when the delivery pump is weighed to the net weight value, it is known that the delivery is completed. In this way, a fixed amount of bulk material is transported to the retention pipe again, achieving the effect of quantitative and intermittent delivery of bulk materials to meet the needs of different delivery processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a flow chart of the fluidized conveying method of bulk materials according to the present invention; Figure 2It is a schematic diagram of the fluidized conveying system of bulk materials according to the present invention; Figure 3 It is a partial schematic diagram of the fluidized conveying system of bulk materials according to the present invention; Figure 4 This is a partial view of the retention pipe of the fluidized conveying system for bulk materials described in the present invention.

[0019] Description of reference numerals: 10. Feeding device; 101. Storage bin; 102. Delivery pump; 103. Stay pipe; 104. Push rod; 105. Power unit; 1031. First material speed meter; 1032. Horizontal pipe section; 1033. Sealed pipe connection; 1041, inner tube; 1042, pulse valve; 20. Conveying device; 201. Conveying pipeline; 202. Variable diameter pipeline; 2011, pressure meter; 2012, air flow meter; 2013, second material speed meter; 30. Gas source device; 301. Conveying gas circuit; 302. Discharging gas circuit; 303. Jet gas circuit; 40. Weighing device. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] In addition, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] When an element is referred to as being “fixed to” or “disposed on” or “provided on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0023] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0024] Embodiment 1 Please refer to Figure 1 As shown, this embodiment provides a fluidized conveying method for bulk materials, comprising the following steps: S101, loading bulk materials into the retention pipe.

[0025] A hopper or silo can be used for preloading, and the material can be transferred to the retention pipe through a transfer pump at the outlet of the silo. At the same time, a valve is set on the outlet pipe of the silo, and a material control valve is installed at the entrance of the preloaded barrel of the silo. The amount of preloaded material is controlled by the material control valve to achieve the purpose of accurately controlling the preloaded quantity. After the transfer is completed, the material control valve can be closed for quantitative delivery. Furthermore, the purpose of intermittent material delivery is achieved through the switch control of the valve. That is, the block material is quantitatively transferred to the retention pipe each time through the transfer pump to achieve the purpose of intermittent delivery. If continuous conveying is adopted, it is realized by opening and closing the inlet valve of the conveying pump and the inlet valve of the storage bin. The specific operation is: feeding the storage bin (i.e. the hopper), the block material is transferred from the storage bin to the conveying pump, the inlet valve of the conveying pump is closed, the inlet valve of the storage bin is opened to feed the storage bin, the inlet valve of the storage bin is closed, the inlet valve of the conveying pump is opened, and the filling from the storage bin to the conveying pump is completed. The discharge amount is accumulated by the change of the weighing device to obtain the discharge amount, and the purpose of continuous conveying is achieved. The purpose of batch transfer and conveying is achieved through intermittent and continuous conveying methods.

[0026] At this time, the bulk material stays in the retention pipe, waiting for fluidized transportation.

[0027] S102, open the conveying gas circuit, and monitor whether the pressure fluctuation range value in the pipeline meets the discharge demand; S1021, if not, continue monitoring; S1022, if satisfied, open the discharge gas circuit, and monitor whether there is feedback information on the movement of bulk materials; S1023, if there is no signal feedback, start the jet gas circuit to perform high-pressure jetting on the bulk materials in the staying pipeline; S1024, if there is still no signal feedback, start the push rod in the staying pipeline to physically disturb the bulk materials; S1025, if signal feedback is obtained after high-pressure jetting, or when signal feedback is obtained through physical disturbance of the push rod, it is determined that the material has entered the conveying pipeline, and high-pressure gas is continuously delivered through the conveying gas circuit to fluidize the bulk materials.

[0028] When the conveying gas circuit is opened, the air flow is conveyed in the conveying pipeline, so that the bulk material conveyed to the conveying pipeline is fluidized and conveyed following the air flow. Specifically, the pressure value in the conveying pipeline can be monitored by a pressure meter. For example, within 2-5 seconds (preferably 3 seconds), when the range value of the monitored pressure fluctuation is less than the set fluctuation range value, the discharge gas circuit is opened for high-pressure blowing. If a bulk material is pushed by the high-pressure gas at this time, the feedback signal of the material speed meter indicates that material has entered the conveying pipeline. The material speed meter will continue to monitor. When there is no feedback signal within the set time, high-pressure blowing will be performed to form a bulk material that destroys the initial static state, and then a continuous airflow is provided through the discharge gas circuit to continuously convey the bulk material into the conveying pipeline.

[0029] If there is still no feedback signal within 1-3 seconds (preferably 1 second) after high-pressure blowing, the push rod will be driven to move to physically disturb the bulk materials in the pipeline. At the same time, during the disturbance period, high-pressure blowing will be performed every 1 second to initially disturb the static bulk materials, and after the disturbance, a continuous airflow will be provided through the discharge air path to drive the bulk materials into the conveying pipeline. The bulk materials entering the conveying pipeline are suspended by the airflow, achieving the effect of high-speed fluidized conveying.

[0030] In this way, the problem of bridging of bulk materials and the uncontrollable initial conveying speed during fluidized conveying can be solved, and the difficulty of initial fluidized conveying of bulk materials can be solved.

[0031] Furthermore, the push rod installed in the stay pipe is located at the bottom surface, so that when moving, the bulk materials accumulated on the push rod are disturbed to form a stable disturbance operation, ensuring the destruction of the initial static state of the bulk materials.

[0032] Furthermore, in the method steps of this embodiment, when the push rod is physically disturbed and there is no signal feedback after the set time, when each set time is reached, for example, the set time is 1 second, 2 seconds or 3 seconds, the jet gas path performs a high-pressure jet to ensure stable transportation of bulk materials.

[0033] S103, judging whether the weight of the delivery pump is within the net weight range of the empty pump, if it is greater than the net weight range, then the delivery state of the bulk material is maintained; if it is within the net weight range and the push rod moves to the end point, then the delivery is completed, and the machine is shut down or switched to continuous cycle delivery.

[0034] By weighing to determine whether there is bulk material in the delivery pump, the state of the material in the delivery pump can be accurately and safely determined. Specifically, the weight value of the delivery pump in the empty pump state is weighed, and the weight range value is selected according to the weight value. In this way, in the subsequent weighing process, when the weighed weight meets the weight range value, and after the push rod moves to the end point, it is ensured that there is no material in the delivery pump and the stay pipe, then it can be determined that the delivery is completed, or continuous cyclic delivery is directly carried out, and the material will not stay in the delivery pump and the stay pipe, and continuous delivery is carried out. If delivery is required again, repeat the above steps.

[0035] S104. After completing this transportation, collect the speed values ​​of the fluidized transportation of the bulk materials detected in the transportation pipeline, and compare the obtained minimum speed value with the set transportation speed of the bulk materials. If the minimum speed value is greater than the set transportation speed value, adjust the gas volume value in the next discharge gas path according to the minimum speed value; if the minimum speed value is less than or equal to the set transportation speed value, keep the transportation parameters of the discharge gas path unchanged.

[0036] Specifically, the material speed meter can be used to collect the conveying speed of bulk materials in the conveying pipeline, so that the conveying parameters can be adjusted to adapt to the conveying of bulk materials of different sizes, ensure fluidized conveying, or avoid excessive gas volume and energy waste, so as to achieve efficient and energy-saving transportation.

[0037] In this embodiment, by obtaining the length parameter value X, width parameter value Y and height parameter value Z of the material in three-dimensional space, as well as the diameter value R1 of the retention pipe and the diameter value R2 of the conveying pipe, then: R1>R2, X+Y+Z≤2×R2, R1≥3×(X+Y+Z); and the maximum value of X, Y and Z is less than the value of 0.8×R2, so that the bulk material can be guaranteed to be smaller than the diameter of the conveying pipe.

[0038] Specifically, the diameter of the retention pipe is designed to be relatively large, so that more bulk materials can be accommodated. At the same time, through the numerical limit in the above formula, it can be ensured that the bulk material is smaller than the conveying pipe, and the purpose of fluidized conveying of the bulk material can be achieved. In addition, through the limitation of the above formula, the device parameters can be set according to the material parameters, or the limit parameters of the conveyed material can be determined according to the actual equipment parameters (the limit parameters of the material are limited by the device), so as to ensure the safety and efficiency of the equipment operation.

[0039] Furthermore, in this embodiment, the length between the starting point and the end point of the push rod moving in the residence pipe is L; the maximum value Q among X, Y and Z is selected, then: L=Q×(1+cotα), where α is the stacking angle of the bulk material, and the length extending into the residence pipe is determined in this way to ensure that different areas in the residence pipe can be disturbed, or sequential disturbances can be performed from the outside to the inside to ensure the efficiency of the disturbance.

[0040] Embodiment 2 like Figure 1 and Figure 2 As shown, this embodiment provides a fluidized conveying system for bulk materials, which is used to perform the fluidized conveying method for bulk materials in embodiment 1, and includes a feeding device 10, a conveying device 20, an air source device 30, and a weighing device 40. The feeding device 10 includes a storage bin 101 and a delivery pump 102 arranged at the outlet end of the storage bin 101. The output port of the delivery pump 102 is provided with a stay pipe 103. The stay pipe 103 is provided with a push rod 104 and a power unit 105 for driving the push rod 104 to move. The power unit 105 can be a cylinder, a hydraulic cylinder or a linear motor, or can also be a motor. A gear is designed on the output shaft of the motor, and a rack is arranged on the push rod 104, so that the linear movement is driven by the meshing of the gears. A worm gear structure can also be used to achieve linear drive. One end of the push rod 104 is arranged in the dwelling pipe 103; a first material speed meter 1031 is arranged on the dwelling pipe 103; a conveying pipe 201 is arranged between the conveying device 20 and the dwelling pipe 103, and a reducing pipe 202 is arranged between the conveying pipe 201 and the dwelling pipe 103; the air source device 30 includes a conveying air circuit 301 for providing air flow to the conveying pipe 201, and a discharge air circuit 302 and an air jet circuit 303 whose output ends are arranged in the dwelling pipe 103; the conveying pump 102 is arranged on the weighing device 40, and the weighing device 40 can be a floor scale, or a hydraulic weighing device 40 of the zzy24-50 model.

[0041] Furthermore, in order to facilitate the acquisition of data in the conveying pipeline 201 , a pressure meter 2011 , an air flow meter 2012 and a second material speed meter 2013 are provided on the conveying pipeline 201 .

[0042] Specifically, a silo can be used for preloading, and the material can be transferred to the retention pipe 103 through a delivery pump 102 (the delivery pump 102 can be a transfer pump) at the outlet of the silo. At the same time, a valve is provided on the outlet pipe of the silo, and a material control valve is installed at the entrance of the preloading barrel of the silo. The amount of preloaded material is controlled by the material control valve to achieve the purpose of accurately controlling the preloaded amount. After the transfer is completed, the quantitative delivery can be carried out by closing the material control valve.

[0043] Furthermore, the purpose of intermittent material delivery is achieved by controlling the switch of the valves. That is, the bulk material is quantitatively transported to the stationary pipeline 103 each time by the transfer pump to achieve the purpose of intermittent delivery. If all valves are normally open, the purpose of batch transport is achieved.

[0044] The principle of fluidized conveying is: fluidized conveying is a technology that uses gas or liquid to suspend solid particles. For bulk materials, fluidized conveying includes rolling, jumping, sliding, and suspension of materials in the pipeline. The basic principle is as follows: When gas or liquid passes through a solid particle bed at a certain speed, the friction between the particles and the dynamic pressure of the fluid will cause the particles to suspend and form a state similar to that of a fluid. This is the so-called "fluidized state". In the fluidized state, the behavior of solid particles is similar to that of fluids and can be transported over long distances through pipelines or other conveying equipment. Since the particles are in a suspended state, the friction resistance is small, so the conveying efficiency is high. In the process of fluidized conveying, the key parameters that need to be controlled include the velocity, temperature, pressure of the fluid, and the particle size and density of the solid particles. These parameters will affect the fluidization effect and conveying efficiency.

[0045] Specifically, the pressure value in the conveying pipeline 201 can be monitored by the pressure gauge 2011. For example, within 2-5 seconds (preferably 3 seconds), when the range of the monitored pressure fluctuation is less than the set fluctuation range, the discharge gas path 302 is opened to perform high-pressure blowing. If a block material is pushed by the high-pressure gas at this time, the feedback signal of the first material velocity meter 1031 indicates that the material has entered the conveying pipeline 201. The first material velocity meter 1031 will continue to monitor. If there is no feedback signal within the set time, high-pressure blowing will be performed to form a block material that destroys the initial static state, and then a continuous airflow is provided through the discharge gas path 302 to continuously transport the block material into the conveying pipeline 201.

[0046] If there is still no feedback signal within 1-3 seconds (preferably 1 second) after high-pressure blowing, the push rod 104 will be driven to move to physically disturb the bulk materials in the stationary pipe 103. At the same time, during the disturbance period, high-pressure blowing will be performed every 1 second to initially disturb the static bulk materials, and after the disturbance, continuous airflow will be provided through the discharge air path 302 to drive the bulk materials into the conveying pipe 201. The bulk materials entering the conveying pipe 201 are suspended by the airflow and are fluidized and transported at high speed.

[0047] In this way, the problem of bridging of bulk materials and uncontrollable initial conveying speed during fluidized conveying can be solved, and the problem of difficulty in initial fluidized conveying of bulk materials can be solved.

[0048] like Figure 3 As shown, in this embodiment, the end section of the stay pipe 103 is provided with a horizontal pipe section 1032, and a sealing pipe 1033 is provided on the pipe wall opposite to the outlet direction of the horizontal pipe section 1032, and the middle sliding seal of the push rod 104 is provided in the sealing pipe 1033. Correspondingly, the push rod 104 is installed in the stay pipe 103 at the bottom surface, so that when moving, the bulk materials accumulated on the push rod 104 are disturbed to form a stable disturbance operation, and the initial static state of the bulk materials is ensured to be destroyed. At the same time, through the design of the sealing pipe 1033 and the design of the hard sealing ring or sealing ring, the air tightness in the stay pipe 103 is guaranteed, and the stable operation of the fluidized conveying system of the bulk materials is guaranteed.

[0049] In this embodiment, the push rod 104 is provided with an inner tube 1041 that penetrates the push rod 104. The inner tube 1041 is provided with a first air supply pipe connected to the air jet path 303 and a second air supply pipe connected to the discharge air path 302. The first air supply pipe is provided with a pulse valve 1042. Such a design can reduce the problem of opening a through hole or a joint on the stay pipe 103, and ensure the structural integrity of the stay pipe 103. In addition, the air jet path 303 and the discharge air path 302 can be switched for use, so that when the initial static state of the bulk material is destroyed, the high-pressure gas impact disturbance of the air jet path 303 is realized, and after it is determined that the material is disturbed, the discharge air path 302 is switched to continuously provide airflow to entrain the bulk material and transport it to the conveying pipe 201, forming an effect of stable use and simple structure.

[0050] like Figure 2As shown, in this embodiment, the diameter of the stay pipe 103 is greater than the diameter of the delivery pipe 201, the length of the reducer pipe 202 is the difference between the diameter of the stay pipe 103 and the diameter of the delivery pipe 201, and the reducer pipe 202 is installed at an angle. In this way, a smoothly reduced diameter reducer pipe 202 can be obtained. At the same time, by determining the inclination angle value of the inclined installation, the height position of other equipment can be determined, forming an installation from high to low, so that the initial transportation of materials is more convenient.

[0051] Specifically, the delivery pipe 201 is located at the lowest position, and the installation height of the retention pipe 103 can be determined by determining the inclination angle of the variable diameter pipe 202. Similarly, the installation heights of the corresponding storage bin 101 and the delivery pump 102 can also be determined, so that only the volume of the adapted storage bin 101 (which can be a reactor bin) and the delivery pump 102 (that is, a transfer pump) need to be installed for use, resulting in a simple or convenient design and assembly effect.

[0052] Furthermore, the volume of the reactor silo is obtained based on the amount of reactants required by the conveying device 20, and the volume of the transfer pump is matched, and finally the volume size of the pre-filled barrel is determined to ensure that the volume of the pre-filled barrel is smaller than the volume of the transfer pump, and the volume of the transfer pump is smaller than the volume of the reactor silo, to meet the transfer requirements.

[0053] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A fluidized conveying method for bulk materials, characterized in that: The following steps are involved: Filling bulk materials into the retention pipe; Open the conveying gas path and monitor whether the pressure fluctuation range in the pipeline meets the discharge requirements. If not, continue monitoring. If so, open the discharge gas path and monitor whether there is feedback information on the movement of bulk materials. If there is no signal feedback, the jet gas circuit is started to perform high-pressure jetting on the bulk materials in the retention pipe; if there is still no signal feedback, the push rod is started to physically disturb the bulk materials in the retention pipe; If signal feedback is obtained after high-pressure jetting, or signal feedback is obtained through physical disturbance of the push rod, it is judged that the material has entered the conveying pipeline, and high-pressure gas is continuously conveyed through the conveying gas path to fluidize and convey the bulk material; Determine whether the weight of the conveying pump is within the net weight range of the empty pump. If it is greater than the net weight range, the conveying state of the bulk material is maintained; if it is within the net weight range and the push rod moves to the end point, the conveying is completed and the machine is shut down or switched to continuous cycle conveying.

2. The fluidized conveying method for bulk materials according to claim 1, characterized in that: After the current conveying is completed, the velocity values ​​of the bulk material fluidized conveying detected in the conveying pipeline are collected, and the minimum velocity value obtained is compared with the set bulk material conveying velocity. If the minimum velocity value is greater than the set conveying velocity value, the gas volume value in the next discharge gas path is adjusted according to the minimum velocity value. If the minimum speed value is less than or equal to the set conveying speed value, the conveying parameters of the discharge gas path remain unchanged.

3. The fluidized conveying method for bulk materials according to claim 1, characterized in that: During the physical disturbance of the push rod, if there is no signal feedback after the set time, the jet gas path performs a high-pressure jet when each set time arrives.

4. The fluidized conveying method for bulk materials according to claim 1, characterized in that: Obtaining the length parameter value X, the width parameter value Y and the height parameter value Z of the material in three-dimensional space, as well as the diameter value R1 of the retention pipe and the diameter value R2 of the delivery pipe; Then: R1>R2, X+Y+Z≤2×R2, R1≥3×(X+Y+Z); And the maximum value among X, Y and Z is less than the value of 0.8×R2.

5. The fluidized conveying method for bulk materials according to claim 4, characterized in that: The length between the starting point and the end point of the push rod moving in the stay pipe is L; Select the maximum value Q among X, Y and Z, then: L=Q×(1+cotα), where α is the stacking angle of the bulk material.

6. A fluidized conveying system for bulk materials, used for executing the fluidized conveying method for bulk materials according to any one of claims 1 to 5, characterized in that: include: A feeding device, comprising a storage bin and a delivery pump arranged at the outlet end of the storage bin, wherein the delivery pump has a retention pipe at its output port, a push rod and a power unit for driving the push rod to move are arranged on the retention pipe, and one end of the push rod is arranged in the retention pipe; a first material speed meter is arranged on the retention pipe; A conveying device, wherein a conveying pipeline is arranged between the conveying device and the staying pipeline, and a reducing pipeline is arranged between the conveying pipeline and the staying pipeline; An air source device, comprising a conveying air path for providing airflow to the conveying pipeline, and a discharge air path and an air jet air path with output ends arranged in the staying pipeline; and A weighing device, wherein the delivery pump is arranged on the weighing device.

7. The fluidized conveying system for bulk materials according to claim 6, characterized in that: The push rod is provided with an inner tube penetrating the push rod, the inner tube is provided with a first air supply pipe connected with the jet air path and a second air supply pipe connected with the discharge air path, and the first air supply pipe is provided with a pulse valve.

8. The fluidized conveying system for bulk materials according to claim 6, characterized in that: The conveying pipeline is provided with a pressure meter, an air flow meter and a second material velocity meter.

9. The fluidized conveying system for bulk materials according to claim 6, characterized in that: The end section of the stay pipe is provided with a horizontal pipe section, a sealing pipe section is provided on the pipe wall opposite to the outlet direction of the horizontal pipe section, and the middle sliding seal of the push rod is provided in the sealing pipe section.

10. The fluidized conveying system for bulk materials according to claim 6, characterized in that: The diameter of the staying pipe is greater than the diameter of the conveying pipe, the length of the reducing pipe is the difference between the diameter of the staying pipe and the diameter of the conveying pipe, and the reducing pipe is installed at an angle.

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