Method and apparatus for supplying powders and granules
The dispersion chute with multiple discharge ports and synchronized scraping plates in the conveying system addresses uneven distribution issues, ensuring consistent transfer and mixing of powder and granular materials.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- KUBOTA CORP
- Filing Date
- 2024-11-12
- Publication Date
- 2026-05-22
Smart Images
Figure 2026084770000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a supply method and a supply device for supplying powder and granular materials using a plurality of conveying devices.
Background Art
[0002] Conventionally, Patent Document 1 below discloses a method of conveying powder and granular materials obtained by adding a plurality of types of auxiliary agents to incineration ash such as municipal waste using a conveying mechanism and supplying them to a melting furnace. As the conveying mechanism, for example, as shown in FIG. 12, there is one having a first conveying device 101, a second conveying device 102, and a chute 103.
[0003] The first conveying device 101 and the second conveying device 102 are each composed of, for example, a flight conveyor. The chute 103 is disposed between the discharge side end portion 105 (downstream side end portion) of the first conveying device 101 and the second conveying device 102. The plurality of types of auxiliary agents 107, 108, 109 are respectively introduced into the first conveying device 101 by the introduction devices 110, 111, 112.
[0004] According to this, the incineration ash 114 is introduced into the receiving side end portion 115 (upstream side end portion) of the second conveying device 102 and conveyed from the upstream side to the downstream side. At this time, the auxiliary agents 107, 108, 109 are introduced into the first conveying device 101 by the introduction devices 110, 111, 112, conveyed to the discharge side end portion 105 by the first conveying device 101, and then added to the incineration ash 114 being conveyed by the second conveying device 102 through the chute 103.
[0005] Thereby, the incineration ash 114 (powder and granular materials) added with the plurality of types of auxiliary agents 107, 108, 109 is supplied to the melting furnace 116. The incineration ash 114 contains radioactive substances such as radioactive cesium, and radioactive cesium can be separated by melting the incineration ash 114 in the melting furnace 116. In addition, supply devices for supplying powder and granular materials or wood chips using a plurality of conveying devices are described in, for example, Patent Document 2 and Patent Document 3 below.
Prior Art Documents
[0006] [Patent Document 1] Patent No. 6215390 [Patent Document 2] Japanese Industrial Publication No. 54-95784 [Patent Document 3] Japanese Patent Publication No. 2000-141325 [Overview of the project] [Problems that the invention aims to solve]
[0007] However, in the conventional configuration described above, if there is variation in the amount of auxiliary agents 107, 108, and 109 (powdered or granular material) fed from the input devices 110, 111, and 112 to the first conveying device 101, there is a problem in that the amount of auxiliary agents 107, 108, and 109 transferred from the first conveying device 101 through the chute 103 to the second conveying device 102 will vary considerably.
[0008] The present invention aims to provide a method and apparatus for supplying powders and granules that can suppress variations in the amount of first powders and granules transferred from the first conveying device to the second conveying device, even if there are variations in the amount of first powders and granules put into the first conveying device. [Means for solving the problem]
[0009] To achieve the above objective, the present invention provides a supply method for supplying powdered or granular material to a recipient using a first conveying device and a second conveying device, The first granular material conveyed by the first conveying device is transferred from the first conveying device to the second conveying device using a dispersion chute having multiple discharge ports. During the above transfer, the first granular material is discharged from multiple discharge ports of the dispersion chute to multiple locations in the forward and backward directions of the second conveying device, which differ in the conveying direction.
[0010] According to this, when the first granular material is transferred from the first conveying device to the second conveying device, the first granular material is dispersed and discharged from multiple discharge ports of the dispersion chute to multiple locations in the forward and backward directions of the conveying device of the second conveying device.
[0011] For example, if a dispersion chute has three (or more) discharge sections A, B, and C, the first granular material discharged from the first discharge section A of the dispersion chute to the second conveying device is conveyed in the conveying direction of the second conveying device. When it reaches the second discharge section B, the first granular material discharged from the second discharge section B is added to the first granular material discharged from the first discharge section A. The combined amount of the first granular material discharged from the first discharge section A and the first granular material discharged from the second discharge section B is then conveyed in the conveying direction of the second conveying device.
[0012] Furthermore, the first granular material, which is a combination of the first granular material discharged from the first discharge section A and the first granular material discharged from the second discharge section B, is conveyed in the conveying direction of the second conveying device. When it reaches the location of the third discharge section C, the first granular material discharged from the third discharge section C is added to the first granular material, which is a combination of the first granular material discharged from the first discharge section A and the first granular material discharged from the second discharge section B. As a result, the first granular material, which is a combination of the first granular material discharged from the first discharge section A, the first granular material discharged from the second discharge section B, and the first granular material discharged from the third discharge section C, is conveyed in the conveying direction of the second conveying device.
[0013] This makes it possible to suppress variations in the amount of the first powder material transferred from the first conveying device to the second conveying device, even if there are variations in the amount of the first powder material transferred to the first conveying device.
[0014] According to the powder supply method of the present invention, the dispersion chute has a plurality of front and rear chutes that branch in the conveying direction of the second conveying device, It is preferable that a discharge section is formed at the lower end of each chute.
[0015] According to this, when the first granular material is transferred from the first conveying device to the second conveying device, the first granular material is dispersed almost evenly across multiple chutes and fed into multiple locations at different points in the conveying direction of the second conveying device from each discharge point. As a result, the first granular material is fed into multiple locations at different points in the conveying direction of the second conveying device in almost equal amounts.
[0016] According to the powder supply method of the present invention, the second conveying device is a flight conveyor that conveys the first powder by having a plurality of scraping plates move in the conveying direction within the casing. A flight compartment is formed between opposing scraping plates in the transport direction. When transferring the first granular material from the first conveying device to the second conveying device, it is preferable to discharge the first granular material from multiple discharge ports of the dispersion chute to multiple flight sections that are different in the conveying direction of the second conveying device.
[0017] According to this, as the scraping plate of the second conveying device moves in the conveying direction, the first granular material is discharged to multiple flight sections in the conveying direction of the second conveying device that are different in the forward and backward directions. As a result, the multiple flight sections of the second conveying device from which the first granular material is discharged are sequentially shifted in the conveying direction by the width of one flight section. This makes it possible to suppress variations in the amount of first granular material transferred from the first conveying device to the second conveying device, even if there are variations in the amount of first granular material fed into the first conveying device.
[0018] According to the powder and granular material supply method of the present invention, the first conveying device is a flight conveyor that conveys the first powder and granular material by the movement of a plurality of scraping plates in the conveying direction within a casing. A flight compartment is formed between opposing scraping plates in the transport direction. When transferring the first granular material from the first conveying device to the second conveying device, it is preferable to discharge the first granular material in any one of the flight compartments of the first conveying device from multiple discharge ports of the dispersion chute to multiple flight compartments in the second conveying device that are different in the conveying direction.
[0019] According to this, the first powder particles in any one flight section of the first conveying device are dispersed almost evenly by the dispersion chute and discharged into a plurality of flight sections of the second conveying device. Then, the first powder particles in the subsequent flight section of the first conveying device are dispersed almost evenly by the dispersion chute and discharged into a plurality of subsequent flight sections of the second conveying device.
[0020] Therefore, the plurality of flight sections of the second conveying device into which the first powder particles are discharged are sequentially shifted in the conveying direction by one flight section at a time. Thereby, even if there is a variation in the input amount of the first powder particles input to the first conveying device, the variation in the transfer amount of the first powder particles transferred from the first conveying device to the second conveying device can be suppressed.
[0021] According to the method for supplying powder particles of the present invention, it is preferable that the time required for the scraping plate of the first conveying device to advance by only one flight section in the conveying direction is the same as the time required for the scraping plate of the second conveying device to advance by only one flight section in the conveying direction.
[0022] According to this, the plurality of flight sections of the second conveying device into which the first powder particles in any one flight section of the first conveying device are discharged can be sequentially shifted in the conveying direction by one flight section of the second conveying device at a time.
[0023] According to the method for supplying powder particles of the present invention, while conveying a second powder particle different from the first powder particle by the second conveying device, the first powder particle is transferred from the first conveying device to the second conveying device using the dispersion chute, and it is preferable that a third powder particle obtained by combining the first powder particle and the second powder particle is supplied to a supply destination by the second conveying device.
[0024] According to this, even if there is variation in the amount of the first granular material fed into the first conveying device, it is possible to suppress variation in the amount of the first granular material transferred from the first conveying device to the second conveying device. Therefore, variation in the amount of the third granular material supplied to the destination by the second conveying device is suppressed, and variation in the mixing ratio of the first granular material and the second granular material in the third granular material is also suppressed.
[0025] The present invention relates to a supply device for supplying powders and granules to a recipient, The system comprises a first conveying device, a second conveying device, and a dispersion chute for transferring the first granular material conveyed by the first conveying device from the first conveying device to the second conveying device. The dispersion chute has an input section into which the first granular material conveyed by the first conveying device is fed, and a plurality of discharge sections into which the first granular material is discharged to the second conveying device. The discharge section is characterized by discharging the first granular material to multiple locations, different in the forward and backward directions of the conveying device of the second conveying device.
[0026] According to the powder and granular material supply device of the present invention, the dispersion chute has a plurality of front and rear chutes that branch in the conveying direction of the second conveying device, It is preferable that a discharge section is formed at the lower end of each chute.
[0027] According to the powder and granular material supply device of the present invention, the second conveying device is a flight conveyor that conveys the first powder and granular material by the movement of a plurality of scraping plates in the conveying direction within the casing. A flight compartment is formed between opposing scraping plates in the transport direction. The dispersion chute preferably discharges the first granular material from multiple discharge sections to multiple flight sections that differ in the conveying direction of the second conveying device.
[0028] According to the powder and granular material supply device of the present invention, the first conveying device is a flight conveyor that conveys the first powder and granular material by the movement of a plurality of scraping plates in the conveying direction within a casing. A flight compartment is formed between opposing scraping plates in the transport direction. The dispersion chute preferably discharges the first granular material from any one of the flight compartments of the first conveying device to multiple flight compartments in the second conveying device that are different in the conveying direction, from multiple discharge sections.
[0029] In the powder and granular material supply device of the present invention, it is preferable that the time required for the scraping plate of the first conveying device to advance by one flight section in the conveying direction is the same as the time required for the scraping plate of the second conveying device to advance by one flight section in the conveying direction.
[0030] According to the powder supply device of the present invention, it is preferable that the second conveying device supplies a third powder, which is a combination of the first powder and a second powder separate from the first powder, to the destination. [Effects of the Invention]
[0031] As described above, according to the present invention, even if there is variation in the amount of first granular material fed into the first conveying device, it is possible to suppress variation in the amount of first granular material transferred from the first conveying device to the second conveying device. [Brief explanation of the drawing]
[0032] [Figure 1] This is a schematic diagram of a radioactive material separation facility according to an embodiment of the present invention. [Figure 2] This is a plan view partially showing the interior of the supply device installed in the radioactive material separation facility. [Figure 3] This is a view from the direction of arrow XX in Figure 2. [Figure 4] This is a view along the YY arrow in Figure 2. [Figure 5] This is a view from the direction of arrow XX in Figure 4. [Figure 6] This is a schematic diagram showing a top-down view of the horizontal cross-section of the first and second conveying devices, illustrating the supply method for supplying powdered or granular material to a melting furnace using the supply device. [Figure 7]The same diagram is a schematic top view of the horizontal cross-section of the first and second conveying devices, illustrating the supply method when supplying powdered or granular material to a melting furnace using the supply device. It shows the flight sections of the first and second conveying devices having advanced by one flight section from the state shown in Figure 6. [Figure 8] The same diagram is a schematic top view of the horizontal cross-section of the first and second conveying devices, illustrating the supply method when supplying powdered or granular material to a melting furnace using the supply device. It shows the flight sections of the first and second conveying devices having advanced by one flight section from the state shown in Figure 7. [Figure 9] The same diagram is a schematic view of the horizontal cross-section of the first and second conveying devices, as seen from above, illustrating the supply method when supplying powdered or granular material to a melting furnace using the supply device. It shows the flight sections of the first and second conveying devices having advanced by one flight section from the state shown in Figure 8. [Figure 10] The same diagram is a schematic view from above of the horizontal cross-section of the first and second conveying devices, illustrating the supply method when supplying powdered or granular material to a melting furnace using the supply device, and shows the dispersion state of the powdered or granular material that has been dispersed and transported from the first conveying device to the second conveying device. [Figure 11] This graph shows the variation in the weight of the powder and granular material fed into the flight section from the first conveying device to the second conveying device of the supply system. [Figure 12] This is a schematic diagram of a conventional conveying mechanism for transporting powders and granules. [Modes for carrying out the invention]
[0033] Hereinafter, embodiments of the present invention will be described with reference to the drawings. (First Embodiment)
[0034] In the first embodiment, as shown in Figure 1, 1 is a radioactive material separation facility for separating radioactive materials from incinerated ash 2 (an example of a second granular material) containing radioactive materials such as radioactive cesium. Incinerated ash 2 is, for example, obtained by incinerating disaster waste or municipal waste contaminated with radioactive materials.
[0035] The radioactive material separation facility 1 has a supply device 10 that supplies incinerated ash 2 to a melting furnace 5 (an example of a supply destination). The supply device 10 includes a first conveying device 11 that conveys the first granular material 6 along a first conveying path 14, a second conveying device 12 that conveys the third granular material 8 along a second conveying path 15, and a dispersion chute 13 that transfers the first granular material 6 conveyed by the first conveying device 11 from the first conveying device 11 to the second conveying device 12.
[0036] The first granular material 6 is a combination of several types of additives 6a to 6c. Of these, the first additive 6a is a basicity adjuster, such as powdered calcium carbonate. The second additive 6b is a volatilization accelerator, such as powdered calcium chloride. The third additive 6c is a circulating neutralizer, consisting of slaked lime (Ca(OH)2) and acidic gases in the exhaust gas (HCl and SO2). X It is a powdery mixture of calcium salts, which are formed by the reaction of (etc.) with unreacted slaked lime.
[0037] The first to third additives 6a to 6c are stored in storage tanks 16 to 18, respectively, and are dispensed from each storage tank 16 to 18 by dispensing devices 20 to 22 and fed into the first conveying device 11 through double dampers 24 to 26.
[0038] The third granular material 8 is a combination of the first granular material 6 (i.e., the first additive 6a + second additive 6b + third additive 6c) and the incinerated ash 2. The incinerated ash 2 is stored in the hopper 28, cut out from the hopper 28 by the cutting device 29, and fed into the second conveying device 12 through the double damper 30. For example, rotary feeders and screw conveyors can be used for the cutting devices 20-22 and 29.
[0039] The first conveying device 11 is positioned above the second conveying device 12, and as shown in Figure 2, in a plan view, the first conveying path 14 of the first conveying device 11 and the second conveying path 15 of the second conveying device 12 are perpendicular to each other.
[0040] As shown in Figures 2 to 4, the first conveying device 11 is a flight conveyor that conveys the first granular material 6 by having multiple scraping plates 34 (scrapers) move in the first conveying direction 35 within a trough-shaped casing 33.
[0041] The scraping plate 34 is connected to an endless chain (not shown), and the chain is wound between the head-side wheel (not shown) and the tail-side wheel (not shown). As the wheels rotate, the chain rotates in one direction, and the scraping plate 34 moves in conjunction with the chain in the first conveying direction 35.
[0042] In the first conveying direction 35, a flight compartment 36 is formed between opposing scraping plates 34. As shown in Figure 1, the first to third additives 6a to 6c, which are cut out by the cutting devices 20 to 22, are each fed into the flight compartment 36 of the first conveying device 11 via the double dampers 24 to 26. As a result, the first granular material 6 (first additive 6a + second additive 6b + third additive 6c) is supplied into the flight compartment 36, and the scraping plates 34 push and convey the first granular material 6 in the first conveying direction 35.
[0043] As shown in Figure 3, the scraper plate 34, which has moved in the first transport direction 35 along the first transport path 14, reverses upward at its downstream end (head end) and returns to the upstream side (tail side) along the first return path 37. The first transport path 14 is located below the first return path 37.
[0044] The second conveying device 12 is a flight conveyor that conveys the third granular material 8 (first granular material 6 + incinerated ash 2) by having multiple scraping plates 41 (scrapers) move in the second conveying direction 42 within a trough-shaped casing 40.
[0045] The scraping plate 41 is connected to an endless chain (not shown), and the chain is wound between the head-side wheel (not shown) and the tail-side wheel (not shown). As the wheels rotate, the chain rotates in one direction, and the scraping plate 41 moves in conjunction with the chain in the second conveying direction 42.
[0046] In the second transport direction 42, a flight compartment 43 is formed between opposing scraping plates 41. As shown in Figure 1, the incinerated ash 2 scraped by the cutting device 29 passes through the double damper 30 and is fed into the flight compartment 43 of the second transport device 12. As a result, the scraping plates 41 push and transport the incinerated ash 2 in the second transport direction 42.
[0047] As shown in Figure 4, the scraper plate 41, which has moved in the second transport direction 42 along the second transport path 15, reverses upward at its downstream end (head end) and returns to the upstream side (tail side) along the second return path 38. The second transport path 15 is located below the second return path 38.
[0048] As shown in Figures 2 to 4, the dispersion chute 13 has an input port 48 (an example of an input section) into which the first granular material 6 conveyed by the first conveying device 11 is fed, first to third chutes 51 to 53 (an example of multiple chutes before and after) that branch off from the input port 48 in the second conveying direction 42, and first to third discharge ports 55 to 57 (an example of multiple discharge sections) that discharge the first granular material 6 to the second conveying device 12. The input port 48 is formed at the upper end of the dispersion chute 13.
[0049] The first to third discharge ports 55 to 57 are formed at the lower ends of the first to third chutes 51 to 53. In addition, the first to third branch ports 59 to 61 are formed at the upper ends of the first to third chutes 51 to 53 and directly below the inlet 48, communicating with the inlet 48 and the first to third discharge ports 55 to 57.
[0050] The dispersion chute 13 discharges the first granular material 6 from any one of the flight compartments 36 of the first conveying device 11 to three different forward and backward flight compartments 43 in the second conveying direction 42 of the second conveying device 12, through the first to third discharge ports 55 to 57.
[0051] The transport speeds of the first and second transport devices 11 and 12 are adjusted so that the time T1 required for the scraper plate 34 of the first transport device 11 to move in the first transport direction 35 for a length L1 minute of one flight section 36 (see Figure 3), and the time T2 required for the scraper plate 41 of the second transport device 12 to move in the second transport direction 42 for a length L2 minutes of one flight section 43 (see Figure 4), are the same time T (time T = time T1 = time T2). Hereafter, the above time T will be referred to as the cycle time T. The following describes a supply method for supplying the third granular material 8 (first granular material 6 + incineration ash 2) to the melting furnace 5 using the supply device 10 described above.
[0052] The first and second conveying devices 11 and 12 are activated to move the scraping plate 34 of the first conveying device 11 along the first conveying path 14 in the first conveying direction 35, and move the scraping plate 41 of the second conveying device 12 along the second conveying path 15 in the second conveying direction 42.
[0053] As shown in Figure 1, by operating the dispensing devices 20 to 22, the first additive 6a stored in the storage tank 16 is dispensed from dispensing device 20 and fed into the flight section 36 of the first conveying device 11 through the double damper 24, the second additive 6b stored in the storage tank 17 is dispensed from dispensing device 21 and fed into the flight section 36 of the first conveying device 11 through the double damper 25, and the third additive 6c stored in the storage tank 18 is dispensed from dispensing device 22 and fed into the flight section 36 of the first conveying device 11 through the double damper 26.
[0054] As a result, as shown in Figures 2 to 4, the first granular material 6, which is a combination of the first additive 6a, the second additive 6b, and the third additive 6c, is supplied to each flight section 36 of the first conveying device 11 and is pushed by the scraping plate 34 and conveyed in the first conveying direction 35.
[0055] Furthermore, as shown in Figures 1, 2, and 4, by operating the cutting device 29, the incinerated ash 2 stored in the hopper 28 is supplied to each flight section 43 of the second conveying device 12 and is pushed by the scraping plate 41 and conveyed in the second conveying direction 42.
[0056] As shown in Figures 3 and 4, when the first granular material 6 in any one of the flight sections 36 that has been transported in the first transport direction 35 by the first transport device 11 reaches the downstream end (head end) of the first transport path 14, it is fed into the inlet 48 of the dispersion chute 13, falls through the first to third branching ports 59 to 61 and through the first to third chutes 51 to 53, and is discharged from the first to third discharge ports 55 to 57 into three different forward and backward flight sections 43 in the second transport direction 42 of the second transport device 12.
[0057] As a result, the first granular material 6, which has been transported from the first conveying device 11 through the dispersion chute 13, is added to the incinerated ash 2 in each flight compartment 43 of the second conveying device 12. Consequently, as shown in Figures 3 to 5, the third granular material 8, which is a combination of the incinerated ash 2 and the first granular material 6, is transported by the second conveying device 12 and supplied to the raw material input section of the melting furnace 5 shown in Figure 1.
[0058] In this manner, the third granular material 8 supplied to the melting furnace 5 shown in Figure 1 is melted within the melting furnace 5 and removed from the melting furnace 5 as molten slag 70. Furthermore, the radioactive cesium (an example of radioactive material) contained in the incineration ash 2 of the third granular material 8 reacts with chlorine during the melting process to form cesium chloride, which volatilizes and is discharged from the melting furnace 5 along with the exhaust gas 71, and is recovered as fly ash by a dust collector (not shown). This allows for the separation and reduction of radioactive cesium from the incineration ash 2.
[0059] Furthermore, as described above, the third granular material 8 has the first to third additives 6a to 6c added to it. Therefore, the first additive 6a increases the basicity of the third granular material 8, lowering the melting point of the incinerated ash 2, and as a result, the fluidity of the molten slag 70 is improved.
[0060] Furthermore, the second additive 6b makes it easier for the radioactive cesium contained in the incinerated ash 2 to volatilize, ensuring that the radioactive cesium is reliably volatilized and discharged together with the exhaust gas 71.
[0061] Furthermore, because the third additive 6c contains calcium (Ca) and chlorine (Cl), it lowers the melting point of the incinerated ash 2, similar to the first additive 6a and the second additive 6b, and makes it easier for radioactive cesium to volatilize. This improves the fluidity of the molten slag 70 and ensures that the radioactive cesium is reliably volatilized and discharged with the exhaust gas 71, and recovered as fly ash. In other words, if appropriate amounts of the first to third additives 6a to 6c can be added to the incinerated ash 2 while suppressing variations, the amount of the first to third additives 6a to 6c used can be reduced. The operation of the above supply method will be explained below.
[0062] As shown in Figure 6, for example, when the first granular material 6, which has been introduced into the nth flight section 36 of the first conveying device 11, is conveyed in the first conveying direction 35 and reaches the top of the dispersion chute 13, it is introduced from the first conveying device 11 into the inlet 48, falls through the first to third chutes 51 to 53, and is introduced from the first to third discharge ports 55 to 57 into the (N-1th), the nth, and the (N+1th)th flight sections 43 of the second conveying device 12 in approximately equal amounts.
[0063] At this time, the first granular material 6 in the region R, which is slightly to the right when viewed from the first conveying direction 35, passes through the first chute 51 and is fed into the [N+1]th flight section 43 of the second conveying device 12 from the first discharge port 55, while the first granular material 6 in the region L, which is slightly to the left when viewed from the first conveying direction 35, passes through the third chute 53 and is fed into the [N-1]th flight section 43 of the second conveying device 12 from the third discharge port 57, and furthermore, the first granular material 6 in the central region C when viewed from the first conveying direction 35 passes through the second chute 52 and is fed into the [N]th flight section 43 of the second conveying device 12 from the second discharge port 56.
[0064] Subsequently, after the cycle time T has elapsed, as shown in Figure 7, the first granular material 6 that has been introduced into the [n+1]th flight section 36 (the subsequent flight section 36) of the first conveying device 11 is conveyed in the first conveying direction 35 to reach the top of the dispersion chute 13, is introduced from the first conveying device 11 to the inlet 48, falls through the first to third chutes 51 to 53, and is introduced from the first to third outlets 55 to 57 into the [Nth]th flight section 43, the [N+1]th flight section 43, and the [N+2]th flight section 43 of the second conveying device 12 in almost equal amounts.
[0065] Furthermore, as the cycle time T elapses, as shown in Figure 8, the first granular material 6 that has been introduced into the [n+2th] flight section 36 (the subsequent flight section 36) of the first conveying device 11 is conveyed in the first conveying direction 35 to reach the top of the dispersion chute 13, is introduced from the first conveying device 11 to the inlet 48, falls through the first to third chutes 51 to 53, and is introduced from the first to third outlets 55 to 57 into the [N+1th], [N+2nd], and [N+3rd] flight sections 43 of the second conveying device 12 in almost equal amounts.
[0066] Subsequently, as the cycle time T elapses, as shown in Figure 9, the first granular material 6 that has been introduced into the [n+3]th flight section 36 (the subsequent flight section 36) of the first conveying device 11 is conveyed in the first conveying direction 35 to reach the top of the dispersion chute 13, is introduced from the first conveying device 11 to the inlet 48, falls through the first to third chutes 51 to 53, and is introduced from the first to third outlets 55 to 57 into the [N+2]th, [N+3]th, and [N+4]th flight sections 43 of the second conveying device 12 in almost equal amounts.
[0067] As described above, by repeating the transport process shown in Figures 6 to 9, the first granular material 6 is dispersed from the first transport device 11 and fed into the second transport device 12, as shown in Figure 10. For example, the first granular material 6R(n) in the right-leaning area R of the [n]th flight section 36 of the first transport device 11 is fed into the [N+1]th flight section 43 of the second transport device 12, the first granular material 6C(n) in the central area C of the [n]th flight section 36 of the first transport device 11 is fed into the [N]th flight section 43 of the second transport device 12, and the first granular material 6L(n) in the left-leaning area L of the [n]th flight section 36 of the first transport device 11 is fed into the [N-1]th flight section 43 of the second transport device 12.
[0068] As a result, even if there is variation in the amount of the first granular material 6 fed into each flight section 36 of the first conveying device 11 (i.e., each flight section 36 of [...n-1, n, n+1, n+2, ...th]), the first granular material 6 is distributed and fed into the three flight sections 43 of the second conveying device 12. Therefore, the amount of the first granular material 6 fed into each flight section 43 of the second conveying device 12 becomes a moving average of the three flight sections 36 of the first conveying device 11. Consequently, it is possible to suppress variation in the amount of the first granular material 6 transferred from the first conveying device 11 through the distribution chute 13 to each flight section 43 of the second conveying device 12 (i.e., each flight section 43 of [...N-1, N, N+1, N+2, ...th]).
[0069] This suppresses variations in the supply amount of the third granular material 8 (first granular material 6 + incineration ash 2) supplied to the melting furnace 5 by the second conveying device 12, and also suppresses variations in the mixing ratio of the first granular material 6 and the incineration ash 2 in the third granular material 8.
[0070] Graphs G1 to G3 in Figure 11 show an example of the weight variation of the first granular material 6 fed into the first to eleventh flight sections 43 of the second conveying device 12, starting from the first conveying device 11.
[0071] The horizontal axis of graphs G1 to G3 shows the flight section 43 numbers of the second conveying device 12, and the vertical axis shows the weight of the first granular material 6 fed from the first conveying device 11 into each flight section 43 of the second conveying device 12.
[0072] Of these, graph G1, shown by the dotted line, shows the weight of the first granular material 6 in one flight section 43 of the second conveying device 12 when the first granular material 6 in any one of the flight sections 36 of the first conveying device 11 is fed together into one of the flight sections 43 of the second conveying device 12 without being dispersed.
[0073] Furthermore, the graph G2, shown as a solid line, shows the weight of the first granular material 6 in one flight section 43 of the second conveying device 12 when the first granular material 6 in any one of the flight sections 36 of the first conveying device 11 is distributed and fed into any three of the flight sections 43 of the second conveying device 12.
[0074] Furthermore, graph G3, shown by the dashed line, shows the breakdown of the weight of the first granular material 6 shown in graph G1 above. For example, if the weight of the first granular material 6 added in graph G1 is 6000g, it indicates that approximately 2000g each of the first to third additives 6a to 6c that make up the first granular material 6 were added (2000g × 3 = 6000g).
[0075] According to this, the weight fluctuation of the first granular material 6 shown in graph G2 is more gradual than the weight fluctuation of the first granular material 6 shown in graph G1, confirming that the weight fluctuation of the first granular material 6 is smoothed out by the moving average.
[0076] In the above embodiment, as shown in Figure 4, the first granular material 6 is dispersed to three locations using the dispersion chute 13. However, it is not limited to three locations; it may be dispersed to two or four or more locations.
[0077] In the above embodiment, flight conveyors were used for the first conveying device 11 and the second conveying device 12, but the invention is not limited to flight conveyors, and other types such as bucket conveyors or belt conveyors may also be used.
[0078] In the above embodiment, the transport speeds of the first and second transport devices 11 and 12 were shown as being equal to the time T1 required for the scraping plate 34 of the first transport device 11 to travel a length L1 minute of one flight section 36 and the time T2 required for the scraping plate 41 of the second transport device 12 to travel a length L2 minute of one flight section 43. However, the above times T1 and T2 may be different. That is, if the first granular material 6 that is dispersed and added from each flight section 36 of the first transport device 11 via the dispersion chute 13 is added repeatedly in each flight section 43 of the second transport device, then the above time T1 may be less than 1 times or greater than 1 time T2.
[0079] In the above embodiment, as shown in Figures 6 to 10, the first granular material 6 that falls through the first to third chutes 51 to 53 and is discharged from the first to third outlets 55 to 57 is added at different positions in the width direction of the flight section 43 of the second conveying device 12 (i.e., in the direction perpendicular to the second conveying path 15). This is to clearly show that the weight of the first granular material 6 is smoothed out. The first granular material 6 discharged from the first to third outlets 55 to 57 may be added at the same position in the width direction of each flight section 43 of the second conveying device 12, or it may be added over the entire width of each flight section 43.
[0080] In the above embodiment, the first granular material 6 is a combination of several types of additives 6a to 6c, but it may be just one type of additive. It may also be a granular material other than an additive. Furthermore, although incinerated ash 2 is given as an example of the second granular material, it is not limited to incinerated ash 2, and may be a granular material other than incinerated ash 2.
[0081] In the above embodiment, as shown in Figure 2, in a plan view, the first transport path 14 of the first transport device 11 and the second transport path 15 of the second transport device 12 intersect at an angle of 90°, but they may intersect at an angle other than 90°. Also, in a plan view, the first transport path 14 and the second transport path 15 may be formed in the same direction without intersecting. In the above embodiment, a melting furnace 5 was given as an example of a supply destination, but it is not limited to a melting furnace 5. [Explanation of symbols]
[0082] 2. Incinerator ash (second granular material) 5. Melting furnace (supplier) 6 First powder material 8 Third powder 10 Feeding device 11. First conveying device 12. Second conveying device 13 Dispersed Shots 33 Casing 34 Scraping board 35 First conveying direction 36 Flight Sections 40 Casing 41 Scraping board 42 Second Conveying Direction 43 Flight Sections 48 Inlet (Inlet part) 51-53 1st-3rd Shots 55~57 1st~3rd discharge port (discharge part)
Claims
1. A supply method for supplying powdered or granular material to a recipient using a first conveying device and a second conveying device, The first granular material conveyed by the first conveying device is transferred from the first conveying device to the second conveying device using a dispersion chute having multiple discharge ports. A method for supplying powdered or granular materials, characterized in that, during the above transfer, the first powdered or granular material is discharged from multiple discharge ports of the dispersion chute to multiple locations in the forward and backward directions of the second conveying device, which differ in the conveying direction.
2. The distributed chute has multiple chutes branching out in the transport direction of the second transport device, The method for supplying powdered or granular material according to claim 1, characterized in that a discharge section is formed at the lower end of each chute.
3. The second conveying device is a flight conveyor that conveys the first powder material by having multiple scraping plates move in the conveying direction within the casing. A flight compartment is formed between opposing scraping plates in the transport direction. The method for supplying powders and granules according to claim 1, characterized in that when transferring the first powders and granules from a first conveying device to a second conveying device, the first powders and granules are discharged from a plurality of discharge ports of a dispersion chute to a plurality of different forward and backward flight sections in the conveying direction of the second conveying device.
4. The first conveying device is a flight conveyor that conveys the first powder or granular material by having multiple scraping plates move in the conveying direction within the casing. A flight compartment is formed between opposing scraping plates in the transport direction. The method for supplying powders and granules according to claim 3, characterized in that when transferring the first powders and granules from a first conveying device to a second conveying device, the first powders and granules in any one of the flight compartments of the first conveying device are discharged from a plurality of discharge ports of the dispersion chute to a plurality of forward and backward flight compartments of the second conveying device that are different in the conveying direction.
5. The method for supplying powders and granules according to claim 4, characterized in that the time required for the scraping plate of the first conveying device to advance by one flight section in the conveying direction is the same as the time required for the scraping plate of the second conveying device to advance by one flight section in the conveying direction.
6. The method for supplying granular materials according to claim 1, characterized in that a second granular material, separate from the first granular material, is transported by a second transporting device, the first granular material is transferred from the first transporting device to the second transporting device using a dispersion chute, and the third granular material, which is a combination of the first and second granular materials, is supplied to the destination by the second transporting device.
7. A supply device for supplying powders and granules to a recipient, The system comprises a first conveying device, a second conveying device, and a dispersion chute for transferring the first granular material conveyed by the first conveying device from the first conveying device to the second conveying device. The dispersion chute has an input section into which the first granular material conveyed by the first conveying device is fed, and a plurality of discharge sections for discharging the first granular material to the second conveying device. The discharge section is characterized by discharging the first granular material to multiple locations, different in the forward and backward directions of the second conveying device.
8. The distributed chute has multiple chutes branching out in the transport direction of the second transport device, The powder and granular material supply device according to claim 7, characterized in that a discharge section is formed at the lower end of each chute.
9. The second conveying device is a flight conveyor that conveys the first powder material by having multiple scraping plates move in the conveying direction within the casing. A flight compartment is formed between opposing scraping plates in the transport direction. The powder supply device according to claim 7, characterized in that the dispersion chute discharges the first powder from a plurality of discharge sections to a plurality of forward and backward flight sections that are different in the conveying direction of the second conveying device.
10. The first conveying device is a flight conveyor that conveys the first powder or granular material by having multiple scraping plates move in the conveying direction within the casing. A flight compartment is formed between opposing scraping plates in the transport direction. The powder supply device according to claim 9, characterized in that the dispersion chute discharges the first powder from any one flight section of the first conveying device to multiple flight sections in the forward and backward directions of the second conveying device, which differ in the conveying direction, from multiple discharge sections.
11. The powder and granular material supply device according to claim 10, characterized in that the time required for the scraping plate of the first conveying device to advance by one flight section in the conveying direction is the same as the time required for the scraping plate of the second conveying device to advance by one flight section in the conveying direction.
12. The powder supply device according to claim 7, characterized in that the second conveying device supplies a third powder mixture, which is a combination of the first powder mixture and a second powder mixture separate from the first powder mixture, to the recipient.