RDF fuel feeding system

Abstract

The present invention discloses a feeding system for RDF fuel, which comprises a silo, a first conveying member, a second conveying member and a third conveying member connected in sequence, wherein the silo contains RDF fuel, the first conveying member is arranged below the silo and is used to convey the RDF fuel in the silo, the second conveying member is arranged at one end of the first conveying member, is used to receive the RDF fuel on the first conveying member and convey the RDF fuel to the third conveying member, the third conveying member is arranged below the second conveying member and is suitable for connecting the second conveying member with a burner. The feeding system for RDF fuel of the embodiment of the present invention has the advantages of being not easy to be blocked and having a high fuel utilization rate.

Description

Technical Field

[0001] The invention relates to the technical field of RDF, in particular to a feeding system of RDF fuel. Background Art

[0002] Refuse Derived Fuel (RDF) is a fuel made by crushing, sorting, drying, adding chemicals, and compressing combustible waste. With the rapid development of the manufacturing industry, the amount of waste, scraps, and leftovers that cannot be used in the manufacturing process accounts for 30% to 40% of the total materials. The disorderly stacking of leftover garbage not only affects the image of the city, but also poses a fire hazard, polluting the environment and causing economic losses.

[0003] Research has found that some scraps of garbage have a high calorific value and can replace some natural fossil fuels in the cement and thermal power industries. The use of scraps to prepare fuel saves coal while absorbing waste, which has good economic and environmental benefits. Moreover, the fuel made from the above-mentioned scraps has a lower carbon emission factor than fossil fuels, and is one of the effective measures for cement, thermal power and other industries to achieve carbon emission reduction. However, the inventors found that in the prior art, due to the huge differences in specific gravity, bulk density, particle size, grindability and other aspects between conventional fuels such as coal powder and scraps of garbage, the original fuel delivery system of industrial kilns is difficult to directly transport RDF fuel, which greatly limits the promotion and utilization of RDF fuel. Summary of the invention

[0004] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0005] RDF fuel is lighter than pulverized coal and does not have the good fluidity of pulverized coal. RDF fuel is difficult to control during transportation, which leads to problems such as bulking and blockage during the unloading and transportation of RDF fuel.

[0006] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a feeding system for RDF fuel, which has the advantages of being not prone to blockage, high fuel utilization rate and high degree of automation.

[0007] The feeding system of RDF fuel in the embodiment of the present invention comprises a silo, a first conveying member, a second conveying member and a third conveying member connected in sequence, wherein the silo contains RDF fuel, the first conveying member is arranged below the silo and extends along a first direction, the first conveying member is used to convey the RDF fuel in the silo, the second conveying member is arranged at one end of the first conveying member, is used to receive the RDF fuel on the first conveying member and convey the RDF fuel to the third conveying member, the third conveying member is arranged below the second conveying member and extends along a second direction, the second direction is orthogonal to the first direction, one end of the third conveying member is connected to the second conveying member, the other end of the third conveying member is suitable for communicating with a burner, and the third conveying member is used to convey the RDF fuel to the burner.

[0008] Compared with the prior art in which RDF fuel is transported in the original fuel transport system of an industrial furnace, the RDF fuel feeding system of the embodiment of the present invention effectively solves the problems of blockage and low utilization rate of RDF fuel during transportation. Moreover, RDF fuel can be fed continuously during transportation, thereby improving the utilization rate and transportation efficiency of RDF fuel and reducing the processing cost of RDF fuel. The feeding system has a simple structure, a high degree of automation, is easy to operate, and saves costs.

[0009] In some embodiments, the RDF fuel feeding system further includes a transition piece, which is disposed between one end of the first conveying member and the second conveying member, and the RDF fuel on the first conveying member can fall onto the second conveying member through the transition piece.

[0010] In some embodiments, the transition piece has a chamber and an opening, wherein the opening is located on a side of the transition piece adjacent to the first conveying piece, the opening is connected to the chamber, at least a portion of one end of the first conveying piece extends into the chamber through the opening, the first conveying piece is movable relative to the transition piece, and one end of the first conveying piece has a spacing from the inner wall surface of the chamber in the first direction, and the spacing is 0.3 m-0.7 m.

[0011] In some embodiments, the transition piece extends in the up-down direction, the upper end of the transition piece protrudes from the conveying surface of the first conveying piece, and the up-down direction, the first direction, and the second direction are orthogonal to each other.

[0012] In some embodiments, a cross-sectional area of ​​the transition piece gradually decreases from an upper end of the transition piece to a lower end of the transition piece along the up-down direction, and the lower end of the transition piece is connected to the second conveying piece.

[0013] In some embodiments, the RDF fuel feeding system further includes a height limiting member, which is disposed between the first conveying member and the silo, and the height limiting member and the conveying surface of the first conveying member are spaced apart in the up and down directions, and the up and down directions, the first direction, and the second direction are orthogonal to each other.

[0014] In some embodiments, the distance between the height limiting member and the conveying surface of the first conveying member in the up and down direction is 0.2 m-0.4 m.

[0015] In some embodiments, an end portion of the first conveying member protrudes from a side wall of the silo in the first direction, and the height limiting member is located between the side wall of the silo and the end portion of the first conveying member.

[0016] In some embodiments, the RDF fuel feeding system further includes a guide member, wherein the guide members are two and are arranged on a conveying surface of the first conveying member at intervals along the second direction, the first conveying member is movable relative to the guide members, and one end of the two guide members adjacent to the second conveying member extends along the first direction and is inclined in a direction approaching each other.

[0017] In some embodiments, the distance between the height limiting member and the conveying surface of the first conveying member in the up-down direction is smaller than the dimension of the flow guide member in the up-down direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of a feeding system for RDF fuel according to an embodiment of the present invention.

[0019] Figure 2 1 is a schematic top view of a feeding system for RDF fuel according to an embodiment of the present invention.

[0020] Figure 3 1 is a side schematic diagram of a feeding system for RDF fuel according to an embodiment of the present invention.

[0021] Figure 4 Schematic diagram of a front view of a feeding system for RDF fuel according to an embodiment of the present invention.

[0022] Figure numerals: 11, silo; 12, first conveying member; 121, conveying surface; 13, second conveying member; 14, third conveying member; 15, transition member; 151, opening; 16, height limiting member; 17, guide member. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0024] like Figure 1-4 As shown, the feeding system of RDF fuel in the embodiment of the present invention comprises a silo 11, a first conveying member 12, a second conveying member 13 and a third conveying member 14 which are connected in sequence. The silo 11 contains RDF fuel, and the first conveying member 12 is arranged below the silo 11 and along a first direction (such as Figure 1 The first conveying member 12 extends in the left and right directions as shown in the figure, and is used to convey the RDF fuel in the silo 11. Specifically, the silo 11 is a straight cylinder, and the lower end of the silo 11 is open. The left end of the first conveying member 12 protrudes from the left side of the silo 11 in the first direction, so that the RDF fuel in the silo 11 is not easily spilled when it falls on the first conveying member 12, thereby reducing the waste of RDF fuel.

[0025] The second conveying member 13 is disposed at one end of the first conveying member 12 (such as Figure 1 The third conveying member 14 is disposed below the second conveying member 13 and along the second direction (eg, Figure 2 The third conveying member 14 extends in the second direction (as shown), the second direction is orthogonal to the first direction, one end of the third conveying member 14 is connected to the second conveying member 13, and the other end of the third conveying member 14 is suitable for connecting to the burner (not shown), and the third conveying member 14 is used to transport the RDF fuel to the burner.

[0026] Compared with the prior art in which RDF fuel is transported in the original fuel transport system of the industrial furnace, the RDF fuel feeding system of the embodiment of the present invention effectively solves the problems of blockage and low utilization rate during the transportation of RDF fuel. RDF fuel can be fed continuously during the transportation process, which improves the utilization rate and transportation efficiency of RDF fuel and reduces the processing cost of RDF fuel. Moreover, the feeding system has a simple structure, a high degree of automation, is easy to operate, and saves costs.

[0027] Specifically, the first conveying member 12 is a chain conveyor, and the first conveying member 12 has a conveying surface 121, and the size of the conveying surface 121 in the second direction is 1.5 meters to 3 meters. The central axis of the lower end of the silo 11 intersects with the central axis of the conveying surface 121 in the second direction, so that the RDF fuel falling from the lower end of the silo 11 on the conveying surface 121 is dispersed as much as possible and evenly distributed on the conveying surface 121.

[0028] The second conveying member 13 is a screw conveyor, and the second conveying member 13 extends in the up-down direction, and the up-down direction, the first direction, and the second direction are orthogonal to each other. The first conveying member 12 conveys the RDF fuel on the conveying surface 121 from the left end of the first conveying member 12 to the upper end of the second conveying member 13, and continuously conveys the RDF fuel to the third conveying member 14 through the second conveying member 13 to prevent the RDF fuel from accumulating.

[0029] The third conveying member 14 is a conveying pipe, one end of the third conveying member 14 is connected to the lower end of the second conveying member 13, and the other end of the third conveying member 14 is connected to the burner to convey the RDF fuel into the burner.

[0030] Specifically, the RDF fuel is delivered to the burner through an independent delivery system. The RDF fuel feeding system is coupled with a system (not shown) for delivering pulverized coal, which not only saves the amount of pulverized coal, but also can absorb the RDF fuel made from scraps.

[0031] In some embodiments, the RDF fuel feeding system further includes a transition piece 15 , which is disposed between one end of the first conveying member 12 and the second conveying member 13 . The RDF fuel on the first conveying member 12 can drop onto the second conveying member 13 through the transition piece 15 .

[0032] Specifically, the transition piece 15 extends in the up-down direction, and the transition piece 15 connects the left end of the first conveying member 12 and the upper end of the second conveying member 13. The RDF fuel on the first conveying member 12 falls onto the second conveying member 13 through the transition piece 15, which can effectively avoid the overflow of the RDF fuel and reduce the waste of the RDF fuel.

[0033] In some embodiments, the transition piece 15 has a chamber (not shown) and an opening 151. The opening 151 is located on the side of the transition piece 15 adjacent to the first conveying member 12, the opening 151 is connected to the chamber, at least part of one end of the first conveying member 12 extends into the chamber through the opening 151, and the first conveying member 12 is movable relative to the transition piece 15 to ensure that the RDF fuel on the first conveying member 12 falls into the chamber as much as possible to reduce waste.

[0034] In some embodiments, a distance between one end of the first conveying member 12 and the inner wall surface of the chamber in the first direction is 0.3 m-0.7 m.

[0035] Specifically, the side of the transition member 15 which is away from the first conveying member 12 and arranged opposite to the opening 151 is spaced apart from the left end of the first conveying member 12 in the first direction, leaving sufficient material unloading space for the RDF fuel on the first conveying member 12 to fall into the chamber, effectively preventing the RDF fuel from being squeezed in the chamber, and making the RDF fuel move more smoothly in the chamber, so that the second conveying member 13 can easily pick up the RDF fuel in the chamber and transport it evenly and continuously, effectively preventing the situation where there is too much fuel and the second conveying member 13 fails to transport it in time, resulting in fuel accumulation, which eventually leads to the fuel being squeezed to death in the chamber and in the second conveying member 13.

[0036] In some embodiments, the transition piece 15 extends in the up-down direction, and the upper end of the transition piece 15 protrudes from the conveying surface 121 of the first conveying member 12 to prevent the first conveying member 12 from spilling when unloading materials into the chamber.

[0037] In some embodiments, the cross-sectional area of ​​the transition piece 15 gradually decreases along the up-down direction from the upper end of the transition piece 15 to the lower end of the transition piece 15, the lower end of the transition piece 15 is connected to the second conveying member 13, and the cross-section of the lower end of the transition piece 15 is adapted to the cross-section of the upper end of the second conveying member 13, so that the transition piece 15 can continuously provide fuel to the second conveying member 13.

[0038] In some embodiments, the RDF fuel feeding system further comprises a height limiting member 16, which is disposed between the first conveying member 12 and the silo 11 and between the side wall of the silo (11) and the end of the first conveying member 12. The height limiting member 16 is spaced apart from the conveying surface 121 of the first conveying member 12 in the vertical direction.

[0039] Specifically, the height limiting member 16 extends along the second direction and is located between the left side wall of the silo 11 and the left end of the first conveying member 12. The height of the RDF fuel falling from the lower end of the silo 11 onto the conveying surface 121 is limited by the height limiting member 16, so that the RDF fuel can be spread flat on the conveying surface 121, thereby preventing the RDF fuel from accumulating when being conveyed from the conveying surface 121 to the chamber.

[0040] In some embodiments, the distance between the height limiting member 16 and the conveying surface 121 of the first conveying member 12 in the vertical direction is 0.2 m-0.4 m, so that the RDF fuel passing through the height limiting member 16 is more evenly distributed on the conveying surface 121 .

[0041] In some embodiments, the feeding system of RDF fuel also includes a guide member 17, and there are two guide members 17. The two guide members 17 are arranged on the conveying surface 121 of the first conveying member 12 at intervals along the second direction. The first conveying member 12 is movable relative to the guide members 17. One end of the two guide members 17 adjacent to the second conveying member 13 extends along the first direction and is inclined in a direction of approaching each other.

[0042] Specifically, the two guide members 17 are arranged relatively to each other in the central circumferential direction of the conveying surface 121 in the second direction, the two guide members 17 extend along the first direction, and one end of the two guide members 17 adjacent to the transition piece 15 is inclined toward a direction approaching each other, so as to better guide the RDF fuel on the conveying surface 121 into the chamber and reduce overflow.

[0043] In some embodiments, the distance between the height limiting member 16 and the conveying surface 121 of the first conveying member 12 in the vertical direction is smaller than the size of the guide member 17 in the vertical direction. Specifically, the lower end of the height limiting member 16 is located below the upper end of the guide member 17, so that the RDF fuel on the conveying surface 121 is not easy to fall from both sides of the conveying surface 121 during the paving process, thereby reducing waste.

[0044] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A feeding system for RDF fuel, characterized in that: The invention comprises a silo (11), a first conveying member (12), a second conveying member (13) and a third conveying member (14) which are connected in sequence, wherein the silo (11) contains RDF fuel, the first conveying member (12) is arranged below the silo (11) and extends along a first direction, the first conveying member (12) is used to convey the RDF fuel in the silo (11), the second conveying member (13) is arranged at one end of the first conveying member (12), is used to receive the RDF fuel on the first conveying member (12) and convey the RDF fuel to the third conveying member (14), the third conveying member (14) is arranged below the second conveying member (13) and extends along a second direction, the second direction is orthogonal to the first direction, one end of the third conveying member (14) is connected to the second conveying member (13), the other end of the third conveying member (14) is suitable for being connected to a burner, the third conveying member (14) is used to convey the RDF fuel to the burner, and the second conveying member is a screw conveyor; The invention also comprises a transition piece (15), wherein the transition piece (15) is arranged between one end of the first conveying member (12) and the second conveying member (13), and the RDF fuel on the first conveying member (12) can fall onto the second conveying member (13) through the transition piece (15); the transition piece (15) has a chamber (151) and an opening (152), wherein the opening (152) is located on a side of the transition piece (15) adjacent to the first conveying member (12), and the opening (152) is communicated with the chamber (151); at least a portion of one end of the first conveying member (12) extends into the chamber (151) through the opening (152); and the first conveying member (12) is (12) is movable relative to the transition member (15), one end of the first conveying member (12) and the inner wall surface of the chamber (151) are spaced apart in the first direction, the space being 0.3 m to 0.7 m, the transition member (15) extends in the up-down direction, the upper end of the transition member (15) protrudes from the conveying surface (121) of the first conveying member (12), the up-down direction, the first direction and the second direction are orthogonal to each other, the cross-sectional area of ​​the transition member (15) gradually decreases from the upper end of the transition member (15) to the lower end of the transition member (15) along the up-down direction, and the lower end of the transition member (15) is connected to the second conveying member (13); It also includes a height limiting member (16), the height limiting member (16) is arranged between the first conveying member (12) and the silo (11), the height limiting member (16) and the conveying surface (121) of the first conveying member (12) are arranged at intervals in the up-down direction, the up-down direction, the first direction and the second direction are orthogonal to each other, and the distance between the height limiting member (16) and the conveying surface (121) of the first conveying member (12) in the up-down direction is 0.2 m-0.4 m; It also comprises a guide member (17), wherein the guide members (17) are two, and the two guide members (17) are arranged on the conveying surface (121) of the first conveying member (12) at intervals along the second direction, the first conveying member (12) is movable relative to the guide member (17), and one end of the two guide members (17) adjacent to the second conveying member (13) extends along the first direction and is inclined in a direction of approaching each other.

2. The RDF fuel feeding system according to claim 1, characterized in that: The end of the first conveying member (12) protrudes from the side wall of the silo (11) in the first direction, and the height limiting member (16) is located between the side wall of the silo (11) and the end of the first conveying member (12).

3. The RDF fuel feeding system according to claim 1, characterized in that: The distance between the height limiting member (16) and the conveying surface (121) of the first conveying member (12) in the up-down direction is smaller than the dimension of the flow guiding member (17) in the up-down direction.

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