Stokehole conveying system and biomass energy system

Abstract

The invention discloses a stokehole conveying system and a biomass energy system, and the stokehole conveying system comprises a buffer tank which is internally provided with a first bin and is provided with a plurality of material outlets and a plurality of material inlets which are connected with the first bin; a second bin is arranged in the material box, the material box is used for containing biological materials, and a first discharging opening connected with the second bin is formed in the material box; the first feeding device comprises a plurality of conveyors, a first feeding machine and a second feeding machine, inlets of the conveyors are connected with the material outlets respectively, an inlet of the first feeding machine is connected with the first discharging port, outlets of the conveyors and an outlet of the first feeding machine are connected with an inlet of the second feeding machine, and the second feeding machine is connected with an outlet of the second feeding machine. And an outlet of the second feeder is connected with the first feeding hole. According to the stokehole conveying system, stable feeding is guaranteed, meanwhile, additional second feeding machines are reduced, the stokehole conveying system is simplified, the occupied area is reduced, and arrangement of the stokehole conveying system is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of biomass burning energy systems, and in particular to a furnace front conveying system and a biomass burning energy system. Background Art

[0002] Compared with traditional coal-fired boilers, biomass fuel is special, and the feeding system is prone to blockage and uneven feeding. Therefore, the feeding system is equipped with two-stage feeding. The feeding amount of the feeder is adjusted through the frequency conversion regulation of the first-stage feeder, and the fixed frequency feeding is then used by the second-stage feeder to meet the demand for stable feeding.

[0003] However, three feeding systems need to be arranged in front of the furnace, namely the biomass feeding system, the lime feeding system and the bed material feeding system, and all of them require two-stage feeders to feed in order to meet the demand for stable feeding. The system is complex and occupies a large area, which has caused certain difficulties in the system layout. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a furnace front conveying system, which reduces the setting of an additional second feeder while ensuring stable feeding, simplifies the furnace front conveying system, reduces the floor space, and is conducive to the layout of the furnace front conveying system.

[0005] The present invention also provides a biomass burning energy system, comprising the above-mentioned furnace front conveying system.

[0006] According to an embodiment of the present invention, a furnace-front conveying system is used for a biomass energy system, wherein the biomass energy system has a combustion furnace, and the combustion furnace has a first feed port. The furnace-front conveying system comprises: a buffer box, wherein the buffer box has a first bin for accommodating bed material and lime material, and the buffer box has a plurality of material outlets and a plurality of material inlets connected to the first bin; a material box, wherein the material box has a second bin for accommodating biomass material, and the material box has a first discharge port connected to the second bin; a first feeding device, wherein the first feeding device comprises a plurality of conveyors, a first feeder and a second feeder, the inlets of the plurality of conveyors are respectively connected to the plurality of material outlets, the inlet of the first feeder is connected to the first discharge port, the outlets of the plurality of conveyors and the outlet of the first feeder are both connected to the inlet of the second feeder, and the outlet of the second feeder is connected to the first feed port.

[0007] According to the furnace-front conveying system of an embodiment of the present invention, a first bin is arranged in a buffer box for accommodating bed material and lime material, and the buffer box has a plurality of material outlets and a plurality of material inlets connected to the first bin; a second bin is arranged in the material box for accommodating biological material, and the material box has a first discharge port connected to the second bin; a first feeding device comprises a plurality of conveyors, a first feeder and a second feeder, the inlets of the plurality of conveyors are respectively connected to the plurality of material outlets, the inlet of the first feeder is connected to the first discharge port, the outlets of the plurality of conveyors and the outlet of the first feeder are both connected to the inlet of the second feeder, and the outlet of the second feeder is connected to the first feed port, so that the bed material and lime material share a buffer box, which can reduce the corresponding box setting, and the biological material, bed material and lime material can share the second feeder, while ensuring stable feeding, it also reduces the setting of an additional second feeder, simplifies the furnace-front conveying system, reduces the floor space, and is beneficial to the layout of the furnace-front conveying system.

[0008] In some embodiments of the present invention, a partition is provided in the first bin, and the partition divides the first bin into a first sub-bin and a second sub-bin separated from each other. The first sub-bin is used to accommodate bed material, and the second sub-bin is used to accommodate lime material. The multiple material outlets include a first outlet and a second outlet, and the multiple material inlets include a first inlet and a second inlet. The first inlet and the first outlet are both connected to the first sub-bin, and the second inlet and the second outlet are both connected to the second sub-bin.

[0009] In some embodiments of the present invention, the furnace front conveying system also includes: a bucket elevator, the bucket elevator having a transportation space, the transportation space being provided with transportation equipment, the bucket elevator having a transportation outlet interconnected with the transportation space, and the transportation outlet being selectively connected to one of the first inlet and the second inlet.

[0010] In some embodiments of the present invention, a three-way valve is provided at the transport outlet, and the three-way valve is provided with a first port, a second port and a third port, the first port is connected to the transport space, the second port is suitable for connecting to the first inlet, the third port is suitable for connecting to the second inlet, and the first port can be selectively connected to the second port or the third port.

[0011] In some embodiments of the present invention, the combustion furnace also has a second feed port, the material box also has a second discharge port connected to the second bin, and the front-of-furnace conveying system also includes: a second feeding device, and the second feeding device is arranged between the second discharge port and the second feed port.

[0012] In some embodiments of the present invention, there are multiple second feed ports, there are multiple second discharge ports corresponding one-to-one to the multiple second feed ports, and there are multiple second feeding devices corresponding one-to-one to the multiple second feed ports.

[0013] In some embodiments of the present invention, the second feeding device includes a plurality of third feeders, and the plurality of third feeders are arranged in the direction from the second discharge port to the second feed port. In the direction from the second discharge port to the second feed port, the inlet of the third feeder at the head end is connected to the second discharge port, and the outlet of the third feeder at the end end is connected to the second feed port, and the inlets and outlets of the plurality of third feeders are connected in sequence.

[0014] In some embodiments of the present invention, the conveyor is an air-lock feeder; and / or, the first feeder is an air-lock feeder; and / or, the second feeder is an air-lock feeder; and / or, the third feeder is an air-lock feeder; and / or, the conveyor is a shaftless screw feeder; and / or, the first feeder is a shaftless screw feeder; and / or, the second feeder is a shaftless screw feeder; and / or, the third feeder is a shaftless screw feeder.

[0015] In some embodiments of the present invention, the rated volume of biomass consumed by the combustion furnace per hour is V1, the volume of the second bin is V2, and V2≤0.5V1.

[0016] The biomass burning energy system according to the embodiment of the present invention includes the above-mentioned furnace front conveying system.

[0017] According to the biomass energy system of the embodiment of the present invention, by setting the above-mentioned furnace front conveying system, a first bin is set in the buffer box for accommodating bed material and lime material, and the buffer box has multiple material outlets and multiple material inlets connected to the first bin; a second bin is set in the material box for accommodating biological material, and the material box has a first discharge port connected to the second bin; the first feeding device includes multiple conveyors, a first feeder and a second feeder, the inlets of the multiple conveyors are respectively connected to the multiple material outlets, the inlet of the first feeder is connected to the first discharge port, the outlets of the multiple conveyors and the outlet of the first feeder are all connected to the inlet of the second feeder, and the outlet of the second feeder is connected to the first feed port, so that the bed material and lime material share a buffer box, which can reduce the corresponding box setting, and the biological material, bed material and lime material can share the second feeder. While ensuring stable feeding, the setting of the additional second feeder is also reduced, which simplifies the furnace front conveying system, reduces the floor space, and is beneficial to the layout of the furnace front conveying system.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 Schematic diagram of a furnace front conveying system according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] 10. Furnace front conveying system;

[0023] 1. Buffer box; 11. First bin; 111. First sub-bin; 112. Second sub-bin; 113. Material inlet; 1131. First inlet; 1132. Second inlet; 114. Material outlet; 1141. First outlet; 1142. Second outlet; 115. Partition;

[0024] 2. Material box; 21. Second bin; 22. First discharge port; 23. Second discharge port;

[0025] 3. First feeding device; 31. Conveyor; 32. Second feeding device; 33. First feeding device;

[0026] 4. Second feeding device; 41. Third feeding machine;

[0027] 5. Bucket elevator;

[0028] 20. Combustion furnace; 201. First feed inlet; 202. Second feed inlet. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should 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" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Reference below Figure 1 A furnace front conveying system 10 according to an embodiment of the present invention is described.

[0033] like Figure 1 As shown, the furnace front conveying system 10 according to an embodiment of the present invention includes: a buffer box 1, a material box 2 and a first feeding device 3.

[0034] Specifically, refer to Figure 1 The front-furnace conveying system 10 is used for a biomass energy system. The biomass energy system has a combustion furnace 20. The combustion furnace 20 has a first feed port 201. The buffer box 1 has a first bin 11 for accommodating bed material and lime material. The buffer box 1 has multiple material outlets 114 and multiple material inlets 113 connected to the first bin 11; the material box 2 has a second bin 21 for accommodating biomass material. The material box 2 has a first discharge port 22 connected to the second bin 21; the first feeding device 3 includes multiple conveyors 31, a first feeder 33 and a second feeder 32. The inlets of the multiple conveyors 31 are respectively connected to the multiple material outlets 114, the inlet of the first feeder 33 is connected to the first discharge port 22, the outlets of the multiple conveyors 31 and the outlet of the first feeder 33 are both connected to the inlet of the second feeder 32, and the outlet of the second feeder 32 is connected to the first feed port 201.

[0035] It should be noted that the bed material, as the fluidizing medium in the fluidized bed boiler, is in a fluidized state through the action of high-speed airflow. This fluidized state helps the biomass to be evenly distributed in the combustion furnace 20, promoting the stability and efficiency of the combustion process; and the lime material is used for desulfurization during combustion to reduce the emission and output of harmful gases.

[0036] It can be understood that the inlet of the plurality of conveyors 31 is connected to the plurality of material outlets 114 respectively (one-to-one connection, i.e. the number of conveyors 31 is equal to the number of material outlets 114), the inlet of the first feeder 33 is connected to the first discharge port 22, the outlets of the plurality of conveyors 31 and the outlet of the first feeder 33 are connected to the inlet of the second feeder 32, and the outlet of the second feeder 32 is connected to the first feed port 201. Thus, the bed material and the lime material can enter the same second feeder 32 after they come out of the corresponding conveyors 31 and the biomass can enter the first feeder 33, so that the biomass, the bed material and the lime material can share the second feeder 32, while ensuring stable feeding, the setting of the additional second feeder 32 is reduced, the furnace front conveying system 10 is simplified, the floor space is reduced, and the layout of the furnace front conveying system 10 is facilitated.

[0037] In addition, the furnace front conveying system 10 has a simple configuration, and the number of failure points is reduced accordingly, thereby reducing the number of equipment failures and maintenance times, increasing the life of the equipment, and reducing the energy consumption of the equipment.

[0038] Among them, the second feeder 32 can convey at least one of bed material, lime material and biological material, for example, only bed material, or only lime material, or only biological material, or bed material and lime material, or lime material and biological material, or bed material and biological material, or bed material, lime material and biological material at the same time.

[0039] When the second feeder 32 delivers lime material and biomass at the same time, the lime material and biomass can be fully contacted and mixed before entering the combustion furnace 20, thereby improving the desulfurization efficiency and further reducing the emission of harmful gases.

[0040] Furthermore, the buffer box 1 has a first bin 11 for accommodating bed material and lime material. The buffer box 1 has multiple material outlets 114 and multiple material inlets 113 connected to the first bin 11. At least one of the multiple material outlets 114 can be used for the outflow of bed material, and at least one can be used for the outflow of lime material. At least one of the multiple material inlets 113 can be used for the addition of bed material, and at least one can be used for the addition of lime material.

[0041] Therefore, by using the same buffer box 1 for the bed material and the lime material, the corresponding box settings can be reduced, the furnace front conveying system 10 is further simplified, the floor space is reduced, and the layout of the furnace front conveying system 10 is facilitated.

[0042] Furthermore, the first feeding device 3 may also include multiple fourth feeders (not shown), which are arranged between the outlet of the conveyor 31 and the inlet of the second feeder 32 and / or between the outlet of the first feeder 33 and the inlet of the second feeder 32, and the inlets and outlets of the multiple fourth feeders are connected in sequence, so that the bed material, lime material and biological material can pass through the conveyor 31, multiple fourth feeders and the second feeder 32 in sequence to enter the combustion furnace 20 for combustion.

[0043] Furthermore, the conveyor 31 and multiple fourth feeders can be variable frequency feeders with a certain speed regulation function, and can perform preliminary feeding amount adjustment according to the conditions of the materials (bed material, lime material and biological material) in the first bin 11 and the second bin 21; the second feeder 32 is a fixed frequency feeder with a constant speed, and is responsible for further evenly distributing the materials transported by the conveyor 31, the first feeder 33 or the fourth feeder, to ensure that the fuel flow entering the boiler is stable and uniform.

[0044] According to the furnace front conveying system 10 of the embodiment of the present invention, a first bin 11 is provided in the buffer box 1 for accommodating bed material and lime material, and the buffer box 1 has a plurality of material outlets 114 and a plurality of material inlets 113 connected to the first bin 11; a second bin 21 is provided in the material box 2 for accommodating biomass, and the material box 2 has a first discharge port 22 connected to the second bin 21; the first feeding device 3 includes a plurality of conveyors 31, a first feeder 33 and a second feeder 32, and the inlets of the plurality of conveyors 31 are respectively connected to the plurality of material outlets 114, and the first feeder 33 is connected to the plurality of material outlets 114. The inlet of 33 is connected to the first discharge port 22, the outlets of multiple conveyors 31 and the outlet of the first feeder 33 are all connected to the inlet of the second feeder 32, and the outlet of the second feeder 32 is connected to the first feed port 201, so that the bed material and the lime material share a buffer box 1, which can reduce the corresponding box setting, and the biological material, bed material and lime material can share the second feeder 32. While ensuring stable feeding, the setting of the additional second feeder 32 is also reduced, which simplifies the furnace front conveying system 10, reduces the floor space, and is beneficial to the layout of the furnace front conveying system 10.

[0045] In some embodiments of the present invention, Figure 1As shown, the first bin 11 has a partition 115 therein, which divides the first bin 11 into a first sub-bin 111 and a second sub-bin 112 separated from each other. The first sub-bin 111 is used to accommodate bed material, and the second sub-bin 112 is used to accommodate lime material. The multiple material outlets 114 include a first outlet 1141 and a second outlet 1142. The multiple material inlets 113 include a first inlet 1131 and a second inlet 1132. The first inlet 1131 and the first outlet 1141 are both connected to the first sub-bin 111, and the second inlet 1132 and the second outlet 1142 are both connected to the second sub-bin 112.

[0046] It can be understood that by setting the partition 115, the bed material and the lime material can be separated, so that the buffer box 1 can accommodate the bed material and the lime material at the same time, and the first outlet 1141 and the second outlet 1142 are respectively connected to the inlets of the two conveyors 31, so that the bed material and the lime material can be transported simultaneously and independently, thereby improving the transportation efficiency and avoiding transportation interference between the bed material and the lime material.

[0047] In some embodiments of the present invention, Figure 1 As shown, the furnace front conveying system 10 also includes: a bucket elevator 5, the bucket elevator 5 has a transportation space, the transportation space is provided with transportation equipment, the bucket elevator 5 has a transportation outlet interconnected with the transportation space, and the transportation outlet can be selectively connected to one of the first inlet 1131 and the second inlet 1132.

[0048] It should be noted that the transport equipment includes a drive device, a bucket chain, a bucket, a casing and a tensioning device, etc. The structures of the drive device, bucket chain, bucket, casing and tensioning device are well known to those skilled in the art and will not be described in detail here.

[0049] When bed material needs to be added, the transport outlet is connected to the first inlet 1131, so that bed material is added to the first sub-bin 111. When lime material needs to be added, the transport outlet is connected to the second inlet 1132, so that lime material is added to the second sub-bin 112. Thus, the transport outlet can be selectively connected to one of the first inlet 1131 and the second inlet 1132, so that one bucket elevator 5 can add bed material and lime material into the first bin 11, that is, the bed material and lime material can share one bucket elevator 5, thereby reducing the setting of the bucket elevator 5, further simplifying the furnace front conveying system 10, reducing the floor space, and facilitating the layout of the furnace front conveying system 10.

[0050] In some embodiments of the present invention, Figure 1As shown, a three-way valve is provided at the transport outlet, and the three-way valve is provided with a first port, a second port and a third port. The first port is connected to the transport space, the second port is suitable for connecting to the first inlet 1131, and the third port is suitable for connecting to the second inlet 1132. The first port can be selectively connected to the second port or the third port.

[0051] It can be understood that when bed material needs to be added, the first port is connected to the first inlet 1131, so as to add bed material to the first sub-bin 111; when lime material needs to be added, the first port is connected to the second inlet 1132, so as to add lime material to the second sub-bin 112. Therefore, by setting a three-way valve, the transport outlet can be selectively connected to one of the first inlet 1131 and the second inlet 1132.

[0052] In some embodiments of the present invention, Figure 1 As shown, the combustion furnace 20 also has a second feed port 202, the material box 2 also has a second discharge port 23 connected to the second bin 21, and the furnace front conveying system 10 also includes: a second feeding device 4, which is arranged between the second discharge port 23 and the second feed port 202. Therefore, the biomass can also be conveyed to the combustion furnace 20 through the second feeding device 4, which plays a role of diversion, thereby improving the efficiency of biomass conveying.

[0053] In some embodiments of the present invention, there are multiple second feed ports 202 , the second discharge ports 23 are multiple corresponding to the multiple second feed ports 202 , and the second feeding devices 4 are multiple corresponding to the multiple second feed ports 202 .

[0054] It is understandable that if the biological material is transported only through a single second feeding device 4 and a single first feeding device 3, and too much biological material needs to be transported, it is easy to cause the second feeding device 4 and the first feeding device 3 to be blocked. Therefore, multiple second feeding devices 4 are set to play a diversion role, thereby further improving the transportation efficiency of the biological material, and at the same time avoiding the blockage of the second feeding device 4 and the first feeding device 3.

[0055] In some embodiments of the present invention, Figure 1 As shown, the second feeding device 4 includes a plurality of third feeders 41, and the plurality of third feeders 41 are arranged in the direction from the second discharge port 23 to the second feed port 202. In the direction from the second discharge port 23 to the second feed port 202, the inlet of the first third feeder 41 is connected to the second discharge port 23, and the outlet of the last third feeder 41 is connected to the second feed port 202. The inlets and outlets of the plurality of third feeders 41 are connected in sequence. It can be understood that the provision of the plurality of third feeders 41 can improve the stability during the material conveying process.

[0056] For example, Figure 1In the example shown, the second feeding device 4 includes two third feeders 41, but the present invention is not limited thereto, and the second feeding device 4 may also include more third feeders 41, such as 3, 4, 5 or 6.

[0057] In some embodiments of the present invention, the conveyor 31 is an air-lock feeder; wherein, the air-lock feeder is generally composed of a plurality of mutually sealed chambers, and each chamber realizes the gradual transmission of materials by rotation or reciprocating motion. The material enters the first chamber, at which time the chamber is connected to the atmosphere, but isolated from the subsequent chambers, and the first chamber is closed and isolated from the atmosphere to form a sealed environment. The chamber rotates or moves to bring the material into the next chamber while maintaining a sealed state. The material eventually enters the next feeder (the second feeder 32 or the fourth feeder), and the gas is locked in the chamber and cannot escape. As a result, the contact between the lime material and the bed material and the outside air is reduced, and the dryness of the lime material and the bed material is ensured.

[0058] In some embodiments of the present invention, the first feeder 33 is an air-lock feeder; wherein, the air-lock feeder is generally composed of a plurality of mutually sealed chambers, and each chamber realizes the gradual transmission of materials by rotation or reciprocating motion. The material enters the first chamber, at which time the chamber is connected to the atmosphere, but isolated from the subsequent chambers, and the first chamber is closed and isolated from the atmosphere to form a sealed environment. The chamber rotates or moves, bringing the material into the next chamber while maintaining a sealed state. The material eventually enters the next feeder (the second feeder 32 or the fourth feeder), and the gas is locked in the chamber and cannot escape. In this way, the contact between the biomass and the outside air is reduced, and the dryness of the biomass is ensured.

[0059] In some embodiments of the present invention, the second feeder 32 is an air-lock feeder; wherein, the air-lock feeder is generally composed of a plurality of mutually sealed chambers, and each chamber realizes the gradual transmission of materials by rotation or reciprocating motion. The material enters the first chamber, at which time the chamber is connected to the atmosphere, but isolated from the subsequent chambers, and the first chamber is closed and isolated from the atmosphere to form a sealed environment. The chamber rotates or moves, bringing the material into the next chamber while maintaining a sealed state, and the material eventually enters the combustion furnace 20, while the gas is locked in the chamber and cannot escape. As a result, the contact between the material and the outside air is reduced, the dryness of the material is ensured, and the gas in the combustion furnace 20 can be prevented from leaking into the external environment.

[0060] In some embodiments of the present invention, the third feeder 41 is an air-lock feeder; wherein, the air-lock feeder is generally composed of a plurality of mutually sealed chambers, and each chamber realizes the gradual transmission of materials by rotation or reciprocating motion. The material enters the first chamber, at which time the chamber is connected to the atmosphere, but isolated from the subsequent chambers, and the first chamber is closed and isolated from the atmosphere to form a sealed environment. The chamber rotates or moves, bringing the material into the next chamber while maintaining a sealed state, and the material eventually enters the combustion furnace 20, while the gas is locked in the chamber and cannot escape. As a result, the contact between the material and the outside air is reduced, the dryness of the biomass is ensured, and the gas in the combustion furnace 20 can be prevented from leaking into the external environment.

[0061] In some embodiments of the present invention, the conveyor 31 is a shaftless screw feeder, thereby reducing the entanglement of the lime material and the bed material and ensuring the smoothness of the conveying process.

[0062] In some embodiments of the present invention, the first feeder 33 is a shaftless screw feeder, thereby reducing the entanglement of the biomaterial and ensuring smoothness during the conveying process.

[0063] In some embodiments of the present invention, the second feeder 32 is a shaftless screw feeder, thereby reducing the entanglement of materials and ensuring smoothness during the conveying process.

[0064] In some embodiments of the present invention, the third feeder 41 is a shaftless screw feeder, thereby reducing the entanglement of the biomaterial and ensuring smoothness during the conveying process.

[0065] In some embodiments of the present invention, the rated volume of biomass consumed per hour by the combustion furnace 20 is V1, the volume of the second bin 21 is V2, V2≤0.5V1, for example, V2 is 0.2V1, 0.3V1, 0.4V1 or 0.5V1. Thus, it is possible to avoid excessive biomass in the second bin 21, which may cause the biomass to be compacted and block the first discharge port 22, thereby ensuring smooth supply of the biomass.

[0066] The following describes a biomass burning energy system according to an embodiment of the present invention.

[0067] The biomass burning energy system according to the embodiment of the present invention includes the above-mentioned furnace front conveying system 10.

[0068] According to the biomass energy system of the embodiment of the present invention, by setting the above-mentioned furnace front conveying system 10, a first bin 11 is set in the buffer box 1 for accommodating bed material and lime material, and the buffer box 1 has a plurality of material outlets 114 and a plurality of material inlets 113 connected to the first bin 11; a second bin 21 is set in the material box 2 for accommodating biomass material, and the material box 2 has a first discharge port 22 connected to the second bin 21; the first feeding device 3 includes a plurality of conveyors 31, a first feeder 33 and a second feeder 32, and the inlets of the plurality of conveyors 31 are respectively connected to the plurality of material outlets 114. The inlet of the first feeder 33 is connected to the first discharge port 22, the outlets of the plurality of conveyors 31 and the outlet of the first feeder 33 are all connected to the inlet of the second feeder 32, and the outlet of the second feeder 32 is connected to the first feed port 201, so that the bed material and the lime material share a buffer box 1, which can reduce the corresponding box setting, and the biological material, bed material and lime material can share the second feeder 32. While ensuring stable feeding, the setting of the additional second feeder 32 is also reduced, the furnace front conveying system 10 is simplified, the floor space is reduced, and it is beneficial to the layout of the furnace front conveying system 10.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means 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 representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A furnace front conveying system, characterized in that: Used in a biomass burning energy system, the biomass burning energy system has a combustion furnace, the combustion furnace has a first feed inlet, and the furnace front conveying system includes: A buffer box, wherein the buffer box has a first bin for containing bed material and lime material, and the buffer box has a plurality of material outlets and a plurality of material inlets connected to the first bin; A material box, wherein the material box has a second bin for containing biological material, and the material box has a first discharge port connected to the second bin; The first feeding device comprises a plurality of conveyors, a first feeder and a second feeder, the inlets of the plurality of conveyors are respectively connected to the plurality of material outlets, the inlet of the first feeder is connected to the first discharge port, the outlets of the plurality of conveyors and the outlet of the first feeder are both connected to the inlet of the second feeder, and the outlet of the second feeder is connected to the first feed port.

2. The furnace front conveying system according to claim 1, characterized in that: The first bin is provided with a partition, which divides the first bin into a first sub-bin and a second sub-bin separated from each other. The first sub-bin is used to accommodate bed material, and the second sub-bin is used to accommodate lime material. The multiple material outlets include a first outlet and a second outlet, and the multiple material inlets include a first inlet and a second inlet. The first inlet and the first outlet are both connected to the first sub-bin, and the second inlet and the second outlet are both connected to the second sub-bin.

3. The furnace front conveying system according to claim 2, characterized in that: Also includes: A bucket elevator, wherein the bucket elevator has a transport space, wherein the transport space is provided with transport equipment, and wherein the bucket elevator has a transport outlet interconnected with the transport space, wherein the transport outlet can be selectively connected to one of the first inlet and the second inlet.

4. The furnace front conveying system according to claim 3, characterized in that: A three-way valve is provided at the transport outlet, and a first port, a second port and a third port are provided on the three-way valve. The first port is connected to the transport space, the second port is suitable for connecting to the first inlet, the third port is suitable for connecting to the second inlet, and the first port can be selectively connected to the second port or the third port.

5. The furnace front conveying system according to claim 1, characterized in that: The combustion furnace also has a second feed port, the material box also has a second discharge port connected to the second bin, and the furnace front conveying system also includes: A second feeding device, wherein the second feeding device is arranged between the second discharge port and the second feed port.

6. The furnace front conveying system according to claim 5, characterized in that: There are multiple second feed ports, there are multiple second discharge ports corresponding one-to-one to the multiple second feed ports, and there are multiple second feeding devices corresponding one-to-one to the multiple second feed ports.

7. The furnace front conveying system according to claim 5, characterized in that: The second feeding device includes a plurality of third feeders, and the plurality of third feeders are arranged in the direction from the second discharge port to the second feed port. In the direction from the second discharge port to the second feed port, the inlet of the third feeder at the head end is connected to the second discharge port, and the outlet of the third feeder at the tail end is connected to the second feed port, and the inlets and outlets of the plurality of third feeders are connected in sequence.

8. The furnace front conveying system according to claim 7, characterized in that: The conveyor is an air-lock feeder; And / or, the first feeder is an air-lock feeder; and / or, the second feeder is an air-lock feeder; And / or, the third feeder is an air-lock feeder; And / or, the conveyor is a shaftless screw feeder; And / or, the first feeder is a shaftless screw feeder; And / or, the second feeder is a shaftless screw feeder; And / or, the third feeder is a shaftless screw feeder.

9. The furnace front conveying system according to claim 1, characterized in that: The rated volume of biomass consumed by the combustion furnace per hour is V1, the volume of the second bin is V2, and V2≤0.5V1.

10. A biomass energy system, characterized in that: It comprises a furnace front conveying system according to any one of claims 1-9.

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