TWI698387B - Powder and granule transport device - Google Patents

Abstract

The present disclosure is a powder and granule transport device, comprising a main fluid input section, a working fluid input section, a negative pressure traction section and a throat assembly. The primary fluid input section is used for conveying a main fluid. The working fluid input section is coupled to a compressed gas source to deliver a working fluid from the source of compressed gas. The negative pressure traction section is coupled to the main fluid input section and the working fluid input section, and the main fluid is flowed by the working fluid. The throat assembly is coupled to the negative pressure traction section to provide the main fluid and the working fluid output. A bypass source input hole connecting the compressed gas source is provided at the main fluid input section or the negative pressure traction section for providing a bypass airflow from the compressed air source, so that a gas isolation is caused between the main fluid input section and the negative pressure traction section.

Description

Powder conveying device

The present invention relates to a conveying device, in detail, to a powder and granular conveying device.

A jet pump is a mixed flow conveying mechanical element that uses a higher pressure working fluid to guide a lower pressure main fluid for mass and energy transfer between fluids, and finally outputs a mixed fluid of pressure and mass. Since the jet pump is used to transport the medium by air, it does not have any mechanical transmission components that cannot withstand high-temperature operation, such as control valves, rotary valves, screw conveyors, etc., so it is comparable to mechanical valves with a rotating shaft mechanism. In contrast, it has higher reliability in the transportation of high-temperature media, so the jet pump is particularly suitable for the transportation of high-temperature media.

Jet pumps can be divided into central jet pump and annular jet pump or ring jet pump according to the nozzle structure. The annular jet pump is designed with a nozzle device on the outside of the pipeline, and the main fluid is conveyed through the middle of the pipeline. Among them, the annular nozzles on the outside of the pipeline spray the working fluid into the pipeline at high pressure, and in the pipeline mixing chamber A micro-negative pressure environment is formed to draw the upstream main fluid into the mixing chamber, mix with the working fluid, and then output the mixed fluid through the tapered nozzle to complete the mixed delivery process of the high-pressure working fluid attracting the low-pressure main fluid. The annular jet pump is due to the suction channel in the structure In the middle, coaxially parallel to the pipeline, the main fluid can be continuously supplied and transported, which is beneficial to the transport of solid particles such as ore, capsules and beans. In contrast, the nozzle of the central jet pump is placed in the middle of the pipeline, and the main fluid is conveyed around the periphery of the nozzle. The most common design is the three-way venturi tube. The main body of the three-way venturi tube is designed with a front end. The round pipe of the reaming cavity is a mixing chamber upstream of the reaming cavity. The side of the mixing chamber is designed with a main fluid inlet. The mixing chamber is designed with a nozzle communicating with the working fluid. The nozzle outlet faces the tapered section of the mixing chamber to form a tapered nozzle. , And then connected with the reaming cavity to output the fluid. During operation, the working fluid is sprayed into the mixing chamber at high pressure through the nozzle. The high-speed sprayed working fluid forms a slight negative pressure environment in the mixing chamber, so that the main fluid in the mixing chamber is bypassed The entrainment draws into the mixing chamber and mixes with the working fluid to achieve a uniform velocity and pressure, and then through the tapered nozzle, the mixed fluid is output from the reaming cavity to complete the mixing and delivery process of the high-pressure working fluid attracting the low-pressure main fluid. The center jet pump is different In the design of the multi-hole nozzle of the annular jet pump, the center jet pump is a single nozzle. When the working fluid is ejected from the nozzle, it has a higher flow rate, which can make the mixed fluid have a larger head after being output from the expanding cavity, which is suitable for Applications requiring long-distance transportation.

In addition, in the moving bed reaction system, the particle size of the catalyst is about 1~3mm, and it is continuously circulated in a closed system for chemical reactions. Because the air-carrying oxygen carrier circulation method has better high temperature operation reliability than the mechanical valve type It is widely used in the circulation of catalysts in moving bed reaction systems because of its tightness and tightness. Among them, the jet pump has the function of particle conveying and metering. It has become an important catalyst conveying and metering gas delivery component in the moving bed reaction system. It is only used in chemical production. In the process, the airflow of the reactor and the conveying system needs to be separated from each other to avoid mixing with each other to affect the process and even cause public security risks. This is also the focus of the research and development of such systems.

Therefore, how to find a conveying technology for powders and particles, especially how to make the reactor and the conveying system be gas-isolated, and at the same time make the jet pump have a better effect when conveying solid particles, this will become the technical field The personnel are eager to pursue and strive for the goal.

In view of this, the present invention proposes a design of a gas delivery element suitable for high-temperature operation to transport powder or solid particles. In order to avoid the mixing of the gas flow between the upstream reactor of the gas delivery element and the downstream jet pump, the upstream and downstream energy of the gas delivery element The gas is isolated, and the output can be adjusted and optimized according to the output demand to maintain the delivery efficiency of the jet pump.

The present invention is a powder and granular conveying device, which includes: a main fluid input section, which is used to convey the main fluid; a working fluid input section, which is connected to a compressed gas source to convey the working fluid output by the compressed gas source; and negative pressure traction Section, respectively connecting the main fluid input section and the working fluid input section, so that the working fluid input to the negative pressure traction section pulls the main fluid to move; and a throat assembly, which is connected to the negative pressure traction section for output The main fluid and the working fluid, wherein a bypass air source input hole is provided at the main fluid input section or the negative pressure traction section to provide a bypass air flow into the negative pressure traction section.

In summary, the present invention proposes a powder and granular material conveying device, which can adjust the pressure state of the main fluid input section through the air intake design of the bypass airflow, so that the main fluid input section and the The negative pressure traction section has the effect of gas isolation. In addition, the present invention can further adjust the nozzle position and nozzle cross-sectional area of the nozzle assembly by arranging the nozzle assembly and the screw assembly in the working fluid input section and the negative pressure traction section. Therefore, in addition to adjusting the pressure state of the main fluid input section, the conveying effect of the solid powder can be optimized, so that a single gas source can achieve the controlled discharge, circulating transportation and The operation purpose of regulating the gas seal is especially suitable for the moving bed chemical loop system that produces gas products.

The following describes the technical content of the present invention with specific specific embodiments. Those familiar with the art can easily understand the advantages and effects of the present invention from the content disclosed in this specification. However, the present invention can also be implemented or applied by other different specific embodiments.

It should be noted that the structure, proportion, size, etc. shown in the drawings in this manual are only used to match the content disclosed in the manual for the understanding and reading of those familiar with the art, and are not used to limit the implementation of the present invention. Therefore, it does not have any technical significance. Any structural modification, proportional relationship change, or size adjustment should still fall within the scope of the present invention without affecting the effects and objectives that can be achieved. The technical content disclosed by the invention can be covered. At the same time, the terms such as "above", "first", "second" and "one" cited in this specification are only for ease of description and are not used to limit the scope of the present invention. The change or adjustment of the relative relationship shall be regarded as the scope of the implementation of the present invention without substantial change in the technical content.

Figure 1 is a structural diagram of the powder or granular conveying device of the present invention. The purpose of the powder and granular conveying device of the present invention is to enable the gas (e.g., hydrogen) of the upstream reactor (e.g., element number 33 in Figures 4 and 5) and the working fluid (e.g., air) of the downstream solid-gas mixing chamber to gas Isolation, that is, by adjusting the pressure state of the input end of the main fluid (powder), the pressure in this section is zero, and the purpose of gas isolation above and downstream of the powder conveying device is achieved. It is especially suitable for high temperature powder. Transport of the body. As shown in FIG. 1, the powder and granular conveying device 1 of the present invention includes a main fluid input section 11, a working fluid input section 12, a negative pressure traction section 13 and a throat assembly 14.

The main fluid input section 11 is used to transport the main fluid. The mainstream system mentioned here refers to the powder and granular material from the upstream reactor. Specifically, the upstream reactor will produce mixed gas and solid powder and granular material, and the gas produced It is usually discharged, and it is desired that only solid powder and granules enter the powder and granular conveying device 1, so under normal circumstances, the main fluid input section 11 is for the main fluid to pass through.

The working fluid input section 12 is connected to a compressed gas source (not shown) for conveying working fluid from the compressed gas source; the negative pressure traction section 13 is respectively connected with the main fluid input section 11 and the working fluid input section 12 to make the main flow The body main fluid input section 11 falls into the negative pressure traction section 13 and then moves together with the working fluid to the throat assembly 14; in addition, the throat assembly 14 is connected to the negative pressure traction section 13 to output the main fluid and the working fluid. The main fluid input section 11 or the negative pressure traction section 13 is provided with bypass air source input holes 110, 130, which can provide bypass air flow (air) from a compressed air source or other air sources. In one embodiment, the compressed gas source is, for example, a low-pressure air compressor 2 (as shown in Figures 4 and 5).

Under the above structure, the working fluid and the main fluid will be mixed in the negative pressure pulling section 13. Since the main fluid is solid powder and the working fluid is gas, the working fluid draws the main fluid to the throat assembly 14 and outputs it. In other words, when the working fluid enters the negative pressure traction section 13, the negative pressure traction section 13 will assume a negative pressure state. However, the purpose of the present invention is to isolate the gas in the upstream reactor from the downstream working fluid. The invention will input appropriate bypass air flow from the bypass air source input holes 110, 130 to the main fluid input section 11 or to the negative pressure traction section 13, so that part of the main fluid input section 11 becomes a zero pressure state and is close to the negative pressure. The section of the pressure traction section 13 usually still has a slight pressure difference, but because the partial section of the main fluid input section 11 is at zero pressure, the purpose of upstream and downstream gas isolation can be achieved. In addition, when the partial section of the main fluid input section 11 is at zero pressure, the main fluid will fall into the negative pressure traction section 13 by gravity, that is, fall to the negative pressure only by the weight of the main fluid (solid powder) Traction section 13.

It should be noted that the bypass air source input holes 110 and 130 do not need to exist at the same time, only one of them is required. For example, the bypass air flow can be fed into the bypass air source input hole 130 at the negative pressure traction section 13, which is designed here. When the bypass airflow is sent from below the negative pressure traction section 13, it can also take up the main fluid that sinks to the bottom, and avoid the main fluid from accumulating under the negative pressure traction section 13.

In addition, the powder and granular conveying device 1 can be designed like a jet pump, such as a central jet pump or an annular jet pump. Its function is mainly to enable the working fluid to drive the main fluid to move. For the convenience of description, this embodiment and other subsequent ones The embodiment will be illustrated and explained in the form of a center jet pump.

Figure 2 is a structural diagram of another embodiment of the powder and granular material conveying device of the present invention. As shown in the figure, the main fluid input section 11, working fluid input section 12, negative pressure traction section 13, and throat assembly 14 of the powder and granular conveying device 1 are the same as those shown in Fig. 1, and will not be repeated here. In the embodiment, the powder and granular conveying device 1 further includes a nozzle assembly 15 and a screw assembly 16.

The nozzle assembly 15 is arranged in the working fluid input section 12 and the negative pressure traction section 13 and can move along the axial direction of the working fluid input section 12. Specifically, the nozzle assembly 15 enters from the working fluid input section 12 and goes to the negative pressure traction section 13 extends, the nozzle assembly 15 can be located at the center of the negative pressure traction section 13. In this embodiment, the working flow system is output from the nozzle assembly 15 to the throat assembly 14, and the nozzle assembly 15 and the working fluid input section 12 For gas sealing.

The screw assembly 16 is arranged in the nozzle assembly 15 and can move along the axial direction of the nozzle assembly 15. Specifically, the screw assembly 16 is located inside the nozzle assembly 15 and the two can be coaxially arranged. Among them, the nozzle assembly 15 can be used in the working fluid. The input section 12 and the negative pressure traction section 13 move back and forth, the purpose of which is to adjust the output position of the working fluid, that is, the position when the working fluid output by the compressed air source enters the negative pressure traction section 13, which will affect the working fluid Drive the efficiency of the main fluid; in addition, the screw assembly 16 can move back and forth in the nozzle assembly 15 for the purpose of controlling the output of the working fluid.

During operation, the working fluid input section 12 can accept working fluid provided by an external compressed gas source. For example, the working fluid enters the working fluid input section 12 from the main gas injection port 21, and then enters the negative pressure traction section 13. In addition, the main flow The body enters the main fluid input section 11 from the upstream reactor through the powder discharge port 111, and then enters the negative pressure traction section 13. The working fluid in the negative pressure traction section 13 will drag the main fluid to move. At this time, the screw assembly 16 and The nozzle assembly 15 can regulate the output of the working fluid according to requirements. The ultimate goal is to hope that the main fluid input section 11 is in a zero pressure state. This can be monitored by setting a pressure measuring point 112 on the main fluid input section 11. It can be seen from the above that the powder conveying device 1 of the present invention can control the output of working fluid by adjusting the position of the nozzle assembly 15 in the negative pressure traction section 13 and adjusting the position of the screw assembly 16 in the nozzle assembly 15. The above adjustment mechanism will be described in detail later.

Figure 3 is a structural diagram of the nozzle assembly and screw assembly of the powder and granular conveying device of the present invention. As shown in the figure, one end of the nozzle assembly 15 in the negative pressure traction section 13 is provided with a nozzle 150, and the nozzle 150 has a nozzle opening 151 for output of working fluid, and the screw assembly 16 has a plug 161 located at the nozzle opening 151. And the screw 162 connected to the plug head 161 can adjust the cross-sectional area relationship between the plug head 161 and the nozzle opening 151 by moving the screw 162 to control the output of the working fluid. Specifically, the nozzle opening 151 of the nozzle assembly 15 has a fixed size, and the plug 161 of the screw assembly 16 can be designed with different sizes according to requirements. For example, when the plug 161 is closer to the nozzle opening 151, the output of the nozzle opening 151 will be The amount becomes smaller under the influence of the plug 161. Conversely, when the plug 161 is far from the nozzle opening 151, the output of the nozzle opening 151 is affected by the plug 161 and becomes larger. This is by adjusting the plug 161 and the nozzle opening. 151 cross-sectional area relationship to control the output of working fluid.

In addition, it can be seen from the figure that the nozzle 150 can move back and forth in the working fluid input section 12 and the negative pressure traction section 13, and the range in which the nozzle 150 can move back and forth is the movement range B; and as can be seen from the detailed view of the nozzle opening 151, the plug 161 It can move back and forth inside the nozzle 150, and the range in which the plug 161 can move back and forth is the movement range C.

In addition, the throat assembly 14 includes a jet injection tapered section 141 connected to the negative pressure traction section 13, a throat section 142 connected to the jet injection tapered section 141, and a fluid output diffusion section 143 connected to the throat section 142. When the working fluid in the negative pressure traction section 13 drives the main fluid to be output, it will be injected into the tapered section 141 through the jet first, then through the throat section 142, and finally the working fluid and the main fluid are sent out by the fluid output diffusion section 143.

Figure 4 is a system architecture diagram of the powder and granule conveying device of the present invention applied to a moving bed chemical loop system. Please refer to Figure 3 together. As shown by the arrow in the figure, in the system, the moving bed reactor 33 is the main body, and the discharge port at the bottom of the moving bed reactor 33 is connected to the powder and granular conveying device 1, and then connected to the pneumatic conveying riser 34, the height of the pneumatic conveying riser 34 A cyclone separator 31 is installed at the end, and finally a moving bed reactor 33 is connected to form a circulating loop. The outlet of the cyclone separator 31 is connected to an external dust collector 32 for final exhaust gas purification treatment. In detail, the powder and granular material output by the powder and granular material conveying device 1 will undergo the powder and granular gas circulation 40 in the pneumatic conveying riser 34. When the powder and granular material are sent to the cyclone 31 and pass through the cyclone 31 for solid and gas After separation, the external dust collector 32 will perform exhaust treatment. At this time, only the circulating powder particles 41 will enter the moving bed reactor 33. The moving bed reactor 33 is a reactor that realizes the gas-solid phase reaction process. Granular reactants or catalysts are continuously added to the top of the reactor. As the reaction progresses, the solid materials gradually move down and output from the bottom. The moving bed reactor 33 will add reactant gases 44 that react with the reactants or catalysts, and produce all Gas (hydrogen) 42 is required, but the moving bed reactor 33 is a technology known in the art, and will not be repeated here. After the moving bed reactor 33 is processed, the high-temperature powder and granular body 43 will fall into the main fluid input section 11, that is, enter The powder and granule conveying device 1 of the present invention.

The powder and granular conveying device 1 of the present invention can be combined with a compressed air source to form a solid particle circulating conveying system (not shown). The structure of the powder conveying device 1 is a central jet pump, which provides a single gas of working fluid. For example, a low-pressure compressed air source of 2.0kg/cm ² functions as an operating nozzle performance and air volume for powder delivery, and on the other hand as an air volume for regulating the pressure of the main fluid input section 11. The air volume provided from the same compressed air source is matched with each other, and the pressure of the main fluid input section 11 is used as an indicator, so as to complete the operation of the powder and granular material conveying device 1 for controlling the amount of powder and granular material, regulating the air seal and circulating conveying.

In one embodiment, with the powder and granular conveying device 1 of the present invention, the above-mentioned solid particle circulating conveying system is applied to a moving bed chemical loop system. In addition to illustrating the operation of the present invention as an example, the performance is also verified. The operating procedure of the present invention is that a low-pressure air compressor 2 provides a compressed air source with a flow rate of 2.0 kg/cm ² and a temperature of 150-160°C. This compressed air source can be used as the working fluid 45 to deliver the working fluid 45 to the powder The granular conveying device 1, and regulates the gas flow of the working fluid 45 to the minimum operating air volume or more that can convey the flow of the main fluid (powder or granule). The minimum operating air volume described here will be matched with the powder conveying procedure. It can only be obtained by using pipe size and conveying head, that is, it is adjusted according to actual needs. In one example, during the experimental test of the solid particle circulating delivery system, the average gas flow rate of the working fluid 45 is controlled to be 0.75LPM (liter per minute, L/min, liter per minute), and the main fluid (powder) is conveyed The particle size is about 2mm solid metal particles.

When the working fluid 45 (via FI-003) is input to the powder and granular conveying device 1, the working fluid 45 is ejected from the nozzle opening 151 of the nozzle assembly 15 in a high-speed jet pattern, and enters the jet into the tapered section 141 and the throat Section 142, affected by the high-speed jet, the negative pressure pulling section 13 will form a negative pressure state to pull the gas and solid particles from the upstream moving bed reactor 33 into the main fluid input section 11. In this case, the solid The powders and granules all enter the negative pressure traction section 13, and finally, by moving inertia, the solid powders and granules are injected into the tapered section 141 and the throat section 142 with the jet of the high-speed working fluid 45 to the downstream jet. In an experimental test numbered Test1, this is in the state without the bypass air 46, affected by the pressure of the negative pressure traction section 13, the main fluid input section 11 will become a negative pressure state (at PG-009). The pressure of the main fluid input section is -335mmAq, and the circulating flow rate of the powder and granular body is about 4.7kg/min, as shown in Table 1 below.

However, in order to achieve the purpose of the upstream and downstream gas isolation of the present invention, the bypass gas flow 46 (from FI-006) for powder and granular discharge control can be introduced from the bypass gas source input hole 130 of the negative pressure traction section 13, followed by With the increase and control of the bypass airflow 46, the negative pressure value of the main fluid input section 11 gradually decreases (the pressure increases) until the main fluid input section 11 is adjusted to zero pressure, which is the operating point of the gas isolation function. In an experimental test numbered Test2, by adjusting the flow rate of the bypass airflow 46 to 0.09LPM, the pressure of part of the main fluid input section 11 can reach zero pressure, and the circulating flow rate of solid particles is about 6.1kg/min. As shown in Table 1 below.

The function of the bypass airflow 46 is to control the main fluid input by actively inputting the bypass airflow 46 regardless of whether there is a positive or negative operating pressure in the moving bed reactor 33 connected upstream of the powder and granular conveying device 1. The pressure of section 11 reaches zero pressure, that is, the moving bed reactor 33 where the solid and gas coexist in the upstream of the powder and granular conveying device 1 will not have reactive gas rushing into the powder conveying device 1 downstream, and the powder The gas flow (working fluid 45) of the body conveying device 1 will not be poured upstream into the reactor, so that the purpose of gas sealing between upstream and downstream components can be achieved.

As shown in Table 1 below, in the experimental test result numbered Test2, the disturbance of the bypass air flow 46 can make the pressure of the main fluid input section 11 zero pressure, and the bypass air flow 46 can also increase the circulation flow of solid particles. Therefore, the present invention By adjusting the nozzle assembly 15 to optimize the circulation effect of the powder or granule, the circulation flow rate of the powder or granule is increased by 30% compared with the experimental test result of No. Test1 with no bypass air flow 46.

Bypass airflow Working fluid air volume (LPM) Bypass air volume (LPM) Main fluid input section pressure (mmAq) Powder flow rate (kg/min) Test1 no 0.75 0 -335 4.7 Test2 Have 0.75 0.09 0 6.1 Table I

In addition, the powder and granular material conveying device 1 can continuously convey the main fluid (powder and granular material) with a fixed operating air volume. However, in order to maintain the zero pressure state of the main fluid input section 11, the introduction of the bypass air flow 46 into the bypass air source input hole 130 is bound to affect the negative The negative pressure value of the traction section 13 needs to be adjusted through the nozzle assembly 15 of the present invention under the condition that the gas flow rate of the working fluid 45 is unchanged, so as to optimize the main fluid (powder) Conveying effect. The relevant control parameters are shown in Table 2 below. The adjustment of the nozzle main air (working fluid 45) air supply, nozzle injection position, nozzle flow rate, and bypass airflow 46 can change the output of powder and granular particles and can be based on demand in real time. Online regulation. Operating parameters Nozzle main air supply Nozzle injection position Nozzle flow rate Bypass airflow Actual operation Regulate air volume (FI-003) Adjustable nozzle assembly positioning screw Adjust nozzle and plug Regulate air volume (FI-006) variable Small → big Front → back Small → big Small → big Inlet pressure PG-009 (negative pressure) Small → big Small → big Small → big Big → small Powder output Small → big Small → big Small → big Small → big Online regulation can can can can Table II

It can be seen from the above that the present invention mainly isolates the gas in the moving bed reactor 33 upstream of the powder and granular conveying device 1 from the working fluid 45 in the downstream powder and granular conveying device 1, thereby avoiding gas in the upstream and downstream components. The problem of mixing, and through the design of the nozzle assembly 15 and the screw assembly 16, the output of the working fluid 45 can be adjusted. In addition to providing the adjustment of the zero pressure state, it can also optimize the powder conveying effect.

Figure 5 is a schematic diagram of a system for real-time monitoring of the powder and granular conveying device of the present invention. The present invention utilizes the addition of the bypass airflow 46 to achieve zero pressure in the main fluid input section, and the use of the nozzle assembly and the screw assembly can also adjust the output of the working fluid 45. In other words, if the pressure at a specific location in the system is known , It will be able to get whether the entire solid particle circulating conveying system meets the operation requirements. Therefore, this embodiment is equipped with multiple pressure detectors to determine whether the solid particle circulating conveying system meets the requirements by measuring multiple pressures.

As shown in Fig. 5 and in conjunction with Fig. 3, the control server 4 can receive pressure sensors (PG009, PG008, PG010) respectively installed in the main fluid input section 11, the negative pressure traction section 13, and the throat assembly 14 When the control server 4 determines that the air supply volume needs to be adjusted, for example, the main fluid input section 11 is in a non-zero pressure state, or the working fluid 45 sent by the throat assembly 14 is mixed with the main fluid, and the pressure cannot be adjusted. When the subsequent processing requirements of the entire solid particle circulation conveying system are met, the control server 4 can control the nozzle assembly 15, the screw assembly 16 or the low-pressure air compressor 2 online to adjust the gas output, such as controlling the nozzle of the nozzle assembly 15 Position or the position of the plug 161 of the screw assembly 16 to control the output of the working fluid 45, or directly adjust the low-pressure air compressor 2 to adjust the flow of the output working fluid 45, so that the entire solid particle circulation conveying system conforms to Operation is required. Therefore, the present invention proposes to adjust the conveying effect of the powder or granule conveying device on-line, so as to instantly maintain the conveying efficiency of the powder or granule conveying device for the main fluid.

In summary, the present invention proposes a powder and granular conveying device, which is a conveying device with adjustable nozzle area and position, air-sealing effect, and suitable for high-temperature powder and granular. A compressed air source inputs working fluid to negative pressure. In the traction section, the main fluid is transported by the main fluid input section, and finally output by the throat assembly. In particular, there is a bypass air source input hole beside the powder and granular conveying device, and the main fluid input section can be adjusted through the addition of bypass airflow. The pressure is zero pressure to achieve the purpose of gas isolation between upstream and downstream components. In addition, the output of the working fluid can be adjusted through the nozzle assembly and the screw assembly, which can optimize the conveying effect of solid powders and particles. Furthermore, by monitoring the pressure status of each point , And provide online adjustment of the compressed air source output, the nozzle of the nozzle assembly and the screw position of the screw assembly, so as to achieve the purpose of real-time control.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make slight changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to those defined by the attached patent scope.

1: Powder conveying device

11: Main fluid input section

110: Bypass air source input hole

111: Powder and granular material discharge port

112: Pressure measuring point

12: Working fluid input section

13: Negative pressure traction section

130: Bypass air source input hole

14: Throat assembly

141: Jet into the tapered section

142: Throat

143: fluid output diffusion section

15: nozzle assembly

150: nozzle

151: Nozzle opening

16: screw assembly

161: Stop

162: Screw

2: Low-pressure air compressor

21: Main gas injection port

31: Cyclone

32: External dust collector

33: moving bed reactor

34: Pneumatic conveying rising pipe

4: Control the server

40: Powder and granular air circulation

41: Circulating particles

42: Gas

43: high temperature powder

44: Reactive gas

45: working fluid

46: Bypass airflow

B, C: moving range

Figure 1 is a structural diagram of the powder or granular conveying device of the present invention. Figure 2 is a structural diagram of another embodiment of the powder and granular material conveying device of the present invention. Figure 3 is a structural diagram of the nozzle assembly and screw assembly of the powder and granular conveying device of the present invention. Figure 4 is a system architecture diagram of the powder and granular material conveying device of the present invention applied to a moving bed chemical circuit system. Figure 5 is a schematic diagram of a system for real-time monitoring of the powder and granular conveying device of the present invention.

1: Powder conveying device

11: Main fluid input section

110: Bypass air source input hole

12: Working fluid input section

13: Negative pressure traction section

130: Bypass air source input hole

14: Throat assembly

Claims (8)

A powder and granular conveying device includes: a main fluid input section for conveying the main fluid; a working fluid input section connected to a compressed gas source to convey the working fluid output by the compressed gas source; a negative pressure traction section connected to the main flow respectively Body input section and the working fluid input section, so that the working fluid input to the negative pressure traction section draws the main fluid to move; and a throat assembly connected to the negative pressure traction section for outputting the main fluid and the working fluid , Wherein a bypass air source input hole is provided at the main fluid input section or the negative pressure traction section to provide a bypass air flow into the main fluid input section or the negative pressure traction section so that part of the main fluid input section is Zero pressure state. The powder and granular conveying device described in the first item of the scope of patent application includes a nozzle assembly which is arranged in the working fluid input section and the negative pressure traction section and can move along the axial direction of the working fluid input section, wherein: The working fluid is output by the nozzle assembly. The powder and granular conveying device described in the second item of the scope of patent application includes a screw assembly which is arranged in the nozzle assembly and can move along the axial direction of the nozzle assembly. The powder and granular conveying device described in item 3 of the scope of patent application, wherein the working flow system output by the compressed air source is adjusted by adjusting the nozzle assembly to the The position in the negative pressure traction section and the position of the screw assembly in the nozzle assembly are adjusted to control the output of the working fluid. For the powder and granular conveying device described in the third item of the scope of patent application, wherein the nozzle assembly is provided with a nozzle at one end of the negative pressure traction section, the nozzle has a nozzle opening, and the screw assembly has a nozzle located at the nozzle opening The plug head and the screw connected to the plug head are used to adjust the cross-sectional area relationship between the plug head and the nozzle opening by moving the screw, so as to control the output of the working fluid. According to the powder and granular conveying device described in item 1 of the scope of patent application, wherein the bypass airflow comes from the compressed air source. The powder and granular conveying device described in the first item of the patent application, wherein the throat assembly includes a jet injection tapered section connected to the negative pressure traction section, a throat section connected to the jet injection tapered section, and a The throat section is the fluid output diffusion section. For example, the powder and granular conveying device described in item 1 of the scope of patent application includes a control server for receiving the pressure sensor from the main fluid input section, the negative pressure traction section and the throat assembly. The measured pressure is used to control the output of the working fluid and the bypass airflow.

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