Rotary powder pressurized conveying device

Abstract

The present invention discloses a rotary pulverized coal pressurized conveying device, which includes a fixed cylinder, a rotating cylinder and a plurality of plunger cylinders, wherein the plunger cylinder is provided with a normal pressure feed port and a powder outlet, wherein a cylindrical piston and a hydraulic cylinder for driving the cylindrical piston to move in the plunger cylinder are provided in the plunger cylinder, and the powder outlet is fixed on the fixed cylinder; the fixed cylinder is sleeved on the rotating cylinder, and the rotating cylinder can rotate relative to the fixed cylinder, and a motor for driving the rotating cylinder to rotate is provided on the fixed cylinder; a powder inlet and a high-pressure discharge port are provided on the rotating cylinder, and when the rotating cylinder rotates relative to the fixed cylinder, the powder inlet can be connected to the powder outlet. Through the rotary powder pressurized conveying device of the present invention, continuous conveying of powder is realized, energy consumption is reduced, and emission of inert gas is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of powder pressurized conveying, and in particular to a rotary powder pressurized conveying device. Background Art

[0002] Powder is a collection of numerous small particles. Common powders include pulverized coal, flour or cement powder.

[0003] The pressurized conveying process of powders is involved in many fields such as coal chemical industry, metallurgy, and food processing. Coal gasification, especially pressurized pulverized coal gasification, is a clean coal utilization technology that has developed rapidly in recent years and has been used more and more widely. Pressurized pulverized coal conveying technology is an indispensable technical link in pressurized pulverized coal gasification technology. Pressurized pulverized coal conveying technology is to increase the dry coal powder from normal pressure to a certain high pressure to achieve combustion and gasification of pulverized coal under high pressure.

[0004] The pulverized coal pressurized conveying technology currently used in industry is mainly lock hopper pressurized conveying, the principle of which is to use high-pressure inert gas to flush into the pulverized coal pressurized lock hopper to increase the pressure, and then transport the pulverized coal to the pulverized coal storage tank after the pressure is balanced with the pulverized coal storage tank, and use high-pressure inert gas to replace the solid pulverized coal in the lock hopper, and then discharge the high-pressure inert gas in the pulverized coal lock hopper, and repeat the cycle. For example, CN1376761A discloses a method and device for feeding dry coal powder during the pressurized gasification of dry coal powder, the device includes an intermediate material tank for storing pulverized coal with an inert gas inlet device on a conical surface, a high-pressure pulverized coal bin connected to the bottom of the intermediate material tank by a pipeline, and the intermediate material tank is pressurized with inert gas to make the pressure in the intermediate material tank the same as the high-pressure pulverized coal bin connected to it, and then the pulverized coal is transported to the high-pressure pulverized coal bin. The above technology mainly has the following technical defects:

[0005] 1. The pressurization process requires the emission of a large amount of inert gases such as N2, CO2, etc., causing greater environmental pollution;

[0006] 2. The efficiency of the pressurized conveying process is low and cannot be continuously adjusted;

[0007] 3. Pressurized transportation requires high-pressure resistant equipment, which is large in size and expensive;

[0008] 4. High energy consumption, and high requirements on the sealing and pressure resistance of powder conveying pipelines and pipeline auxiliary parts. Summary of the invention

[0009] In order to solve the above problems, the present invention provides a rotary powder pressurized conveying device, which does not need to discharge inert gas and realizes continuous conveying of powder.

[0010] To achieve the above-mentioned purpose, the rotary powder pressurized conveying device of the present invention comprises a fixed cylinder, a rotating cylinder and a plurality of plunger cylinders, the plunger cylinder is provided with a normal pressure feed port and a powder outlet, the plunger cylinder is provided with a cylindrical piston and a hydraulic cylinder driving the cylindrical piston to move in the plunger cylinder, the powder outlet is fixed on the fixed cylinder; the fixed cylinder is sleeved on the rotating cylinder, the rotating cylinder can rotate relative to the fixed cylinder, the fixed cylinder is provided with a motor driving the rotating cylinder to rotate; the rotating cylinder is provided with a powder inlet and a high-pressure discharge port, and when the rotating cylinder rotates relative to the fixed cylinder, the powder inlet can be connected to the powder outlet.

[0011] Preferably, the plurality of plunger cylinders are evenly arranged along the circumference of the fixed tube.

[0012] Preferably, a sealing strip is provided between the fixed cylinder and the rotating cylinder. The sealing strip is provided on the inner surface of the fixed cylinder. The sealing strip divides the inner surface of the fixed cylinder into a plurality of mutually independent partitions. A plunger cylinder is provided in each partition.

[0013] Preferably, a plurality of adjusting bolts are provided on the fixing cylinder, a spring is provided between the adjusting bolts and the sealing strip, and the adjusting bolts are threadedly connected to the fixing cylinder.

[0014] Preferably, the number of the plunger cylinders is six, and the six plunger cylinders are arranged in two layers along the axial direction of the fixed cylinder.

[0015] Preferably, a combined sealing ring is arranged between the cylindrical piston and the plunger cylinder, and the combined sealing ring includes a V-shaped cloth-inserted sealing ring and a U-shaped sealing ring. A spring sheet with a U-shaped cross-section is arranged in the groove of the U-shaped sealing ring, and the V-shaped cloth-inserted sealing ring is arranged on the opening side of the U-shaped sealing ring.

[0016] Compared with the existing pulverized coal pressure conveying device, the rotary powder pressure conveying device of the present invention has low pressure resistance to the conveying path, low energy consumption, reduced equipment size, reduced equipment cost, and avoided the emission of inert gas. Through the rotary powder pressure conveying device of the present invention, continuous conveying of powder is achieved, energy consumption is reduced, and the emission of inert gas is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the rotary powder pressurizing conveying device of the present invention;

[0018] Figure 2 for Figure 1 A partial enlarged view of the middle A area;

[0019] Figure 3It is a top view of the rotary powder pressurized conveying device of the present invention, which shows an embodiment using six plunger cylinders;

[0020] Figure 4 It is the development diagram of the rotating cylinder;

[0021] Figure 5 It is the expansion diagram of the fixed cylinder;

[0022] Figure 6 It is a schematic diagram of the matching relationship between the sealing strip and the adjusting bolt;

[0023] Figure 7 Schematic diagram of the arrangement of the combined sealing ring. DETAILED DESCRIPTION

[0024] In order to keep the following description of the disclosed embodiments of the present invention clear and concise, the present invention omits the detailed description of known functions and known components. Specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0025] like Figures 1 to 5 As shown, the rotary powder pressurized conveying device of the present invention comprises a fixed cylinder 10, a rotating cylinder 20 and a plurality of plunger cylinders 30, wherein the plunger cylinder 30 is provided with a normal pressure feed port 31 and a powder outlet 32, wherein the plunger cylinder 30 is provided with a cylindrical piston 33 and a hydraulic cylinder 331 for driving the cylindrical piston 33 to move in the plunger cylinder 30, after the powder is fed from the normal pressure feed port 31, the cylindrical piston 33 can push the powder toward the powder outlet 32 ​​driven by the hydraulic cylinder 331, and the powder outlet 32 ​​is fixed on the fixed cylinder 10.

[0026] The fixed cylinder 10 is sleeved on the rotating cylinder 20. The rotating cylinder 20 can rotate relative to the fixed cylinder 10. The fixed cylinder 10 is provided with a motor 23 for driving the rotating cylinder 20 to rotate. The fixed cylinder 10 and the rotating cylinder 20 are coaxially arranged and are clearance-fitted.

[0027] The rotating cylinder 20 is provided with a powder inlet 21 and a high-pressure discharge port 22. When the rotating cylinder 20 rotates relative to the fixed cylinder 10, the powder inlet 21 can communicate with the powder outlet 32. The high-pressure discharge port 22 is provided at the bottom end of the rotating cylinder 20 and connected to the high-pressure silo.

[0028] The plurality of plunger cylinders 30 are evenly arranged along the circumference of the fixed barrel 10. The number of the plunger cylinders 30 can be determined according to the amount of powder to be conveyed. If only one layer of plunger cylinders 30 is provided, only one powder inlet 21 is required. When the rotating barrel 20 rotates, the powder outlets 32 of each plunger cylinder 30 are sequentially connected with the powder inlet 21, and the cycle is repeated. The number of the plunger cylinders 30 is preferably six. The six plunger cylinders 30 are arranged in two layers along the axial direction of the fixed barrel 10, with three in each layer. The plunger cylinders 30 in the upper and lower layers are arranged at intervals. Therefore, when viewed from a top view, the plunger cylinders 30 are still evenly arranged along the circumference of the fixed barrel 10. When a two-layer arrangement is adopted, the number of the powder inlet 21 is two, and each powder inlet 21 corresponds to one layer of plunger cylinders 30.

[0029] A sealing strip 40 is provided between the fixed cylinder 10 and the rotating cylinder 20. The sealing strip 40 is provided on the inner surface of the fixed cylinder 10. The sealing strip 40 divides the inner surface of the fixed cylinder 10 into a plurality of mutually independent partitions 41. The partitions 41 are sealed with each other. A plunger cylinder 30 is provided in each partition 41.

[0030] In order to ensure that the sealing strip 40 provided between the fixed cylinder 10 and the rotating cylinder 20 has good sealing and ensure that the sealing between the partitions 41 is maintained, a plurality of adjusting bolts 11 are provided on the fixed cylinder 10, and a spring 12 is provided between the adjusting bolt 11 and the sealing strip 40. The adjusting bolt 11 is threadedly connected to the fixed cylinder 10. The compression amount of the spring 12 is controlled by rotating the adjusting bolt 11, so that the sealing strip 40 always maintains a reliable seal. The matching relationship between the sealing strip 40 and the adjusting bolt 11 is as shown in FIG. Figure 6 shown.

[0031] A combined sealing ring 50 is provided between the cylindrical piston 33 and the plunger cylinder 30. The combined sealing ring 50 includes a V-shaped cloth-inserted sealing ring 51 and a U-shaped sealing ring 52. Figure 7 As shown, a spring sheet 53 with a U-shaped cross section is arranged in the groove of the U-shaped sealing ring 52, and the V-shaped cloth-inserted sealing ring 51 is arranged on the opening side of the U-shaped sealing ring 52. The V-shaped cloth-inserted sealing ring 51 is used to scrape off the powder, so that the amount of powder entering the main body seal is greatly reduced. The U-shaped sealing ring 52 is the main body seal, and the spring sheet 53 is used for compensating sealing to provide a reasonable resilience for the U-shaped sealing ring 52. The surface of the U-shaped sealing ring 52 is covered with self-lubricating and wear-resistant materials, which can achieve a good sealing effect and effectively increase the service life of the seal. The V-shaped cloth-inserted sealing ring 51 is arranged on the side of the plunger cylinder 30 close to the powder outlet 32.

[0032] Taking one of the plunger cylinders 30 as an example, the powder conveying process of the rotary powder pressurized conveying device of the present invention is explained. The powder is sucked into the plunger cylinder 30 from the normal pressure feed port 31. At this time, the powder inlet 21 of the rotating drum 20 has not entered the partition area 41 where the plunger cylinder 30 is located. After the feeding, the plunger cylinder 30 and the partition area 41 where it is located are at normal pressure. After the feeding, the cylindrical piston 33 moves toward the direction close to the powder outlet 32 ​​under the drive of the hydraulic cylinder 331, closing the normal pressure feed port 31. Then, the pulverized coal inlet 21 on the rotating drum 20 enters the partition area 41 where the plunger cylinder 30 is located during the rotation of the rotating drum 20. Since the interior of the rotating drum 20 is connected to the high pressure silo through the high pressure discharge port 22, the partition area 41 where the plunger cylinder 30 is located begins to be pressurized, and at the same time, the plunger cylinder 30 also begins to be pressurized. As the rotating drum 20 continues to rotate, the powder inlet 21 on the rotating drum 20 enters the partition area 41 where the plunger cylinder 30 is located. , the powder inlet 21 on the rotating cylinder 20 intersects and communicates with the powder outlet 32 ​​on the plunger cylinder 30, so that the powder feeding channel is opened, and the cylindrical piston 33 in the plunger cylinder 30 continues to move toward the powder outlet 32 ​​until the end of the cylindrical piston 33 reaches the powder outlet 32, and all the powder is pushed out of the plunger cylinder 30 from the powder outlet 32, and enters the rotating cylinder 20 through the powder inlet 21. The powder entering the rotating cylinder 20 will eventually enter the high-pressure silo through the high-pressure discharge port 22. When the rotating cylinder 20 continues to rotate until the powder inlet 21 on the rotating cylinder 20 does not intersect with the powder outlet 32 ​​on the plunger cylinder 30, the plunger cylinder 30 completes one feeding. At this time, the cylindrical piston 33 in the plunger cylinder 30 remains stationary, and the rotating cylinder 20 continues to rotate until it rotates out of the segmentation area 41 where the plunger cylinder 30 is located and enters the next segmentation area. The segmentation area 41 where the plunger cylinder 30 is located is cut off from the high pressure in the rotating cylinder 20. At this time, the segmentation area 41 where the plunger cylinder 30 is located is high pressure but small in volume. Then the cylindrical piston 33 in the plunger cylinder 30 moves in a direction away from the powder outlet 32, so that negative pressure is formed in the plunger cylinder 30. When the cylindrical piston 33 is reset, the normal pressure feed port 31 is opened. Since the plunger cylinder 30 is under negative pressure at this time, the powder is sucked into the plunger cylinder 30 to achieve re-feeding and wait for the next powder inlet 21 to enter the segmentation area where the plunger cylinder 30 is located, and the next powder conveying is carried out. The conveying of powder from normal pressure to high pressure is completed through the action coordination between the rotating cylinder 20 and the plunger cylinder 30. The plurality of plunger cylinders 30 circulate in sequence to convey the powder, thereby achieving continuous conveying of the powder.

[0033] As mentioned above, the exemplary embodiments of the present invention are described in detail with reference to the accompanying drawings. It should be understood that the present invention is not intended to limit the scope of protection of the present invention by these specific details. Without departing from the spirit and scope of the present invention, the structure and features of the exemplary embodiments may be changed to be equivalent or similar, and these changes will also fall within the scope of protection determined by the claims attached to the present invention.

Claims

1. A rotary powder pressurized conveying device, characterized in that: It includes a fixed cylinder, a rotating cylinder and several plunger cylinders. The plunger cylinder is provided with a normal pressure feed port and a powder outlet, the plunger cylinder is provided with a cylindrical piston and a hydraulic cylinder driving the cylindrical piston to move in the plunger cylinder, and the powder outlet is fixed on the fixed cylinder; The fixed cylinder is sleeved on the rotating cylinder, the rotating cylinder can rotate relative to the fixed cylinder, and the fixed cylinder is provided with a motor for driving the rotating cylinder to rotate; The rotating cylinder is provided with a powder inlet and a high-pressure discharge port, and when the rotating cylinder rotates relative to the fixed cylinder, the powder inlet can be connected to the powder outlet; A plurality of plunger cylinders are evenly arranged along the circumference of the fixed tube.

2. The rotary powder pressurized conveying device according to claim 1, characterized in that: A sealing strip is provided between the fixed cylinder and the rotating cylinder. The sealing strip is provided on the inner surface of the fixed cylinder. The sealing strip divides the inner surface of the fixed cylinder into a plurality of mutually independent partitions. A plunger cylinder is provided in each partition.

3. The rotary powder pressurized conveying device according to claim 2, characterized in that: A plurality of adjusting bolts are arranged on the fixing cylinder, a spring is arranged between the adjusting bolts and the sealing strip, and the adjusting bolts are threadedly connected to the fixing cylinder.

4. The rotary powder pressurized conveying device according to claim 1, characterized in that: The number of the plunger cylinders is six, and the six plunger cylinders are arranged in two layers along the axial direction of the fixed cylinder, with three in each layer.

5. The rotary powder pressurized conveying device according to claim 1, characterized in that: A combined sealing ring is arranged between the cylindrical piston and the plunger cylinder, and the combined sealing ring includes a V-shaped cloth-inserted sealing ring and a U-shaped sealing ring. A spring sheet with a U-shaped cross-section is arranged in the groove of the U-shaped sealing ring, and the V-shaped cloth-inserted sealing ring is arranged on one side of the opening of the U-shaped sealing ring.

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