Biomass circulating fluidized combustion combined heat and power plant

Abstract

The utility model discloses a kind of biomass circulating fluidized combustion cogeneration device, more particularly to the technical field of biomass circulating fluidized combustion cogeneration device, including bunker, furnace is connected on bunker, the lower side of furnace is connected with first slag pipe, driving mechanism is arranged on first slag pipe, the lower side of first slag pipe is provided with second slag pipe, second slag pipe is connected on driving mechanism, the lower side of second slag pipe is provided with third slag pipe, the lower side of third slag pipe is provided with slag machine;The side of furnace is provided with cyclone separator, the lower side of cyclone separator is provided with return feeder;Second slag pipe includes second slag pipe main body, second slag pipe main body is provided with multiple, the side of second slag pipe main body is provided with first disc;Filter cartridge is arranged in second slag pipe main body. Using above structure, effectively avoid the problem that non-combustible impurities, easy to accumulate and form blockage in slag pipe.

Description

Technical Field

[0001] This utility model relates to the technical field of biomass circulating fluidized combustion cogeneration equipment, specifically to a biomass circulating fluidized combustion cogeneration equipment. Background Technology

[0002] The biomass circulating fluidized bed combustion cogeneration (CFBHC) system is a highly efficient energy system that uses biomass resources such as agricultural and forestry waste, straw, and livestock manure as fuel, integrating circulating fluidized bed combustion technology with a cogeneration model. This system burns biomass fuel in a circulating fluidized bed boiler, converting chemical energy into thermal energy, which then drives a steam turbine to generate electricity. Simultaneously, the generated waste heat (such as steam and hot water) is used to provide heat energy for industry or residential use, achieving cascaded energy utilization.

[0003] Currently, the slag discharge pipe and automatic slag remover of circulating fluidized bed boilers adopt a rigid connection structure. However, this structure still has the following problems: During the operation of biomass circulating fluidized bed boiler units, non-combustible impurities (such as stones, iron pieces, etc.) mixed in biomass fuel are difficult to completely screen out and tend to accumulate in the slag discharge pipe and form blockages. Furthermore, during the process of removing non-combustible impurities, the non-combustible impurities can damage the automatic slag remover, resulting in low slag removal efficiency and seriously restricting the continuous and stable operation of the boiler unit. Utility Model Content

[0004] The purpose of this invention is to provide a biomass circulating fluidized combustion cogeneration device that effectively solves the problems of non-combustible impurities accumulating and clogging, and the damage caused by non-combustible impurities to the slag discharge machine.

[0005] The objective of this utility model can be achieved through the following technical solutions: A biomass circulating fluidized combustion cogeneration device includes a silo, a furnace connected to the silo, a first slag discharge pipe connected to the bottom of the furnace, a drive mechanism installed on the first slag discharge pipe, a second slag discharge pipe installed below the first slag discharge pipe and connected to the drive mechanism, a third slag discharge pipe installed below the second slag discharge pipe, and a slag discharge machine installed below the third slag discharge pipe. A cyclone separator is installed on one side of the furnace, and a return feeder is installed below the cyclone separator. The return feeder is connected to the furnace, and other mechanisms are installed on one side of the cyclone separator. The second slag lowering pipe includes a second slag lowering pipe body, and multiple second slag lowering pipe bodies are provided. A first disc is provided on one side of the second slag lowering pipe body. A filter cylinder is provided inside the second slag lowering pipe body. The drive mechanism drives the second slag pipe to move.

[0006] As a further embodiment of this utility model: the first slag discharge pipe includes a first slag discharge pipe body fixedly connected to the bottom of the furnace. A first ring is fixedly arranged on the bottom surface of the first slag discharge pipe body. The inner ring of the first ring is fixedly connected to the outer side of the first slag discharge pipe body, and the bottom surface of the first ring is flush with the bottom surface of the first slag discharge pipe body. A coaxial cylindrical hole is opened on the top surface of the first ring, and the driving mechanism is located above the coaxial cylindrical hole.

[0007] As a further embodiment of this utility model: a first limiting post is fixedly provided on the bottom surface of the first ring, and the phase difference between the center of the coaxial cylindrical hole and the center of the first limiting post is 180°.

[0008] As a further embodiment of this utility model: two second slag discharge pipe bodies are provided. The second slag discharge pipe body is provided on one side of the first disc, and a second disc is provided on the other side of the second slag discharge pipe body. The two second slag discharge pipe bodies are symmetrically arranged on the first disc, and the first disc and the second disc are symmetrically distributed along the centerline of the axial direction of the second slag discharge pipe body.

[0009] As a further embodiment of this utility model: a first limiting groove is provided on the first disk, the first limiting groove is semi-circular, and the first limiting groove is located at the edge of the first disk; A second limiting groove is provided on the second disc. The second limiting groove is semi-circular, and the first limiting groove and the second limiting groove are symmetrically distributed along the centerline of the axial direction of the second slag pipe body.

[0010] As a further embodiment of this utility model: a base is provided on the top surface of the first disk, and a circular hole is provided at the center of the base. The output shaft of the drive mechanism is connected to the center of the first disk through the circular hole provided at the center of the base.

[0011] As a further embodiment of this utility model: a plurality of circular grooves are provided below the top surface of the base, and the plurality of circular grooves are evenly distributed along the edge of the top surface of the base, and a rolling ball is rolled inside the circular groove.

[0012] As a further embodiment of this utility model: a third ring is provided on the third slag discharge pipe, the third ring is located on the top surface of the third slag discharge pipe, and the top surface of the third ring is flush with the top surface of the third slag discharge pipe.

[0013] As a further embodiment of this utility model: an installation ring is provided inside the main body of the second slag discharge pipe.

[0014] As a further embodiment of this utility model: a positioning post is provided on the third ring, and the positioning post and the second limiting groove cooperate with each other.

[0015] The beneficial effects of this utility model are: By installing a filter cartridge inside the main body of the second slag discharge pipe, non-combustible impurities mixed in the biomass fuel, such as stones and iron pieces, can be effectively intercepted, preventing these impurities from accumulating in the slag discharge pipe and causing blockages, thus ensuring the smooth progress of the slag discharge process.

[0016] Meanwhile, when the filter cartridge in the second slag pipe intercepts a certain amount of non-combustible impurities, the drive mechanism can move the second slag pipe, causing the relative positions of the second and third slag pipes to change, making it easier to transfer the filter cartridge containing the impurities to a suitable position for cleaning.

[0017] Since there are two main bodies for the second slag discharge pipe, when cleaning the filter cartridge, the other filter cartridge that has not intercepted impurities can be used to continue working, ensuring the continuous and stable operation of the entire biomass circulating fluidized combustion cogeneration unit. The energy production process will not be interrupted due to slag cleaning operations, thus improving the continuous and stable operation capability of the boiler unit. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the slag discharge machine in this utility model; Figure 3 This is a schematic diagram of the overall structure of multiple slag discharge pipes in this utility model; Figure 4 This is a schematic diagram of the internal structure of the first slag discharge pipe in this utility model; Figure 5 This is a schematic diagram of the overall structure of the second slag discharge pipe in this utility model; Figure 6 This is a schematic diagram of the overall structure of the base in this utility model; Figure 7 This is a schematic diagram of the internal structure of the second slag discharge pipe in this utility model; Figure 8 This is a schematic diagram of the side structure of the second slag discharge pipe in this utility model; Figure 9 This is a schematic diagram of the internal structure of the filter cartridge in this utility model; Figure 10 This is a schematic diagram of the overall structure of the third slag discharge pipe in this utility model.

[0020] In the diagram: 100, Second slag discharge pipe; 101, Second slag discharge pipe body; 102, First disc; 103, First limiting groove; 104, Base; 105, Rolling ball; 106, Circular groove; 107, Second disc; 108, Mounting ring; 109, Second limiting groove; 200, First slag discharge pipe; 201, First slag discharge pipe body; 202, First ring; 203, First limiting post; 204, Coaxial cylindrical hole; 300, Third slag discharge pipe; 301, Positioning post; 302, Third ring; 400, Drive mechanism; 500, Filter cartridge; 501, Inclined surface; 601, Slag discharger; 602, Hopper; 603, Furnace; 604, Cyclone separator; 605, Return feeder; 606, Other mechanisms. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1-10 As shown, this utility model provides a biomass circulating fluidized combustion cogeneration device. The device includes a silo 602, a furnace 603 connected to one side of the silo 602, a first slag discharge pipe 200 connected to the bottom of the furnace 603, a drive mechanism 400 provided on one side of the first slag discharge pipe 200, a second slag discharge pipe 100 provided below the first slag discharge pipe 200, the second slag discharge pipe 100 connected to the drive mechanism 400, a filter cartridge 500 provided inside the second slag discharge pipe 100, a third slag discharge pipe 300 provided below the second slag discharge pipe 100, and a slag discharge machine 601 provided below the third slag discharge pipe 300.

[0023] A cyclone separator 604 is provided on one side of the furnace 603, and a return feeder 605 is provided below the cyclone separator 604. The return feeder 605 is connected to the furnace 603, and other mechanisms 606 are provided on one side of the cyclone separator 604.

[0024] It should be understood that the slag discharger 601, hopper 602, furnace 603, cyclone separator 604, return feeder 605 and other mechanisms 606 are all existing technologies and will not be explained here.

[0025] During operation, biomass fuel enters the furnace 603 from the hopper 602 for combustion. The resulting flue gas carries unburned particles into the cyclone separator 604. Inside the cyclone separator 604, the flue gas rotates, and the particles are thrown against the separator wall and fall due to centrifugal force. They are then returned to the furnace 603 via the return feeder 605 to continue combustion, achieving circulating fluidized combustion of the particles and improving combustion efficiency.

[0026] The non-combustible impurities such as ash produced during combustion fall through the first ash discharge pipe 200 below the furnace 603 into the filter cylinder 500 inside the second ash discharge pipe 100. Other ash falls into the ash discharge machine 601, which discharges the impurities out of the device.

[0027] By designing the traditional slag discharge pipe into multiple sections and installing a filter cartridge 500 inside the second slag discharge pipe 100, large non-combustible impurities in the ash can be effectively intercepted and separated. This structure prevents non-combustible impurities from directly impacting the slag discharger 601, reducing wear and failure rate, and improving the equipment's operational stability and slag cleaning efficiency. Simultaneously, the connection between the drive mechanism 400 and the second slag discharge pipe 100 makes cleaning and replacing the filter cartridge 500 more convenient, reducing maintenance costs. This solves the problems of large non-combustible impurities easily accumulating and causing blockages in the slag discharge pipe and damaging the slag discharger 601.

[0028] like Figures 3-4 As shown, the first slag discharge pipe 200 includes a first slag discharge pipe body 201 fixedly connected to the bottom of the furnace 603. A first ring 202 is fixedly provided on the bottom surface of the first slag discharge pipe body 201. The inner ring of the first ring 202 is fixedly connected to the outer ring of the first slag discharge pipe body 201, and the bottom surface of the first ring 202 is flush with the bottom surface of the first slag discharge pipe body 201. A coaxial cylindrical hole 204 is provided on the top surface of the first ring 202. A first limiting post 203 is fixedly provided on the bottom surface of the first ring 202. The phase difference between the center of the coaxial cylindrical hole 204 and the center of the first limiting post 203 is 180°. The driving mechanism 400 is located above the coaxial cylindrical hole 204.

[0029] like Figures 5-8As shown, the aforementioned second slag discharge pipe 100 includes a second slag discharge pipe body 101. Two second slag discharge pipe bodies 101 are provided. A first disc 102 is provided on one side of each second slag discharge pipe body 101, and a second disc 107 is provided on the other side. The two second slag discharge pipe bodies 101 are symmetrically arranged on the first disc 102, and the first disc 102 and the second disc 107 are symmetrically distributed along the centerline of the axial direction of the second slag discharge pipe body 101. A first limiting groove 103 is formed on the first disc 102. The first limiting groove 103 is semi-circular and located at the edge of the first disc 102. A second limiting groove 109 is formed on the second disc 107. The second limiting groove 109 is semi-circular, and the first limiting groove 103 and the second limiting groove 109 are symmetrically distributed along the centerline of the axial direction of the second slag discharge pipe body 101.

[0030] A base 104 is provided on the top surface of the first disc 102. A circular hole is provided at the center of the base 104. Multiple circular grooves 106 are provided below the top surface of the base 104 and are evenly distributed along the edge of the top surface of the base 104. Rolling balls 105 are rolled inside the circular grooves 106. An installation ring 108 is provided inside the second slag discharge pipe body 101.

[0031] The output shaft of the drive mechanism 400 is connected to the center of the first disk 102 through a circular hole opened at the center of the base 104.

[0032] During installation, the base 104 and the coaxial cylindrical hole 204 cooperate with each other, so that the second slag pipe 100 is rolled and positioned below the first slag pipe 200. At the same time, the first limiting post 203 is embedded in the first limiting groove 103, which plays a positioning role for the second slag pipe 100.

[0033] When in operation, after the drive mechanism 400 is started, its output shaft drives the first disk 102 to rotate. Since the two second slag pipe bodies 101 are symmetrically arranged on the first disk 102, the second slag pipe 100 will rotate around the first slag pipe 200.

[0034] like Figure 9 As shown, the filter cylinder 500 has an inclined surface 501 on top. The design of the inclined surface 501 allows the ash and slag falling into the filter cylinder 500 to slide down more smoothly, avoiding the accumulation of ash and slag at the inlet of the filter cylinder 500. Multiple filter holes are evenly distributed on the side wall of the filter cylinder 500.

[0035] The filter cartridge 500 is installed inside the second slag discharge pipe body 101 via the mounting ring 108. The filter cartridge 500 and the second slag discharge pipe body 101 are detachably connected, which facilitates cleaning and replacement of the filter cartridge 500 when needed, further improving the ease of use and maintenance efficiency of the device.

[0036] like Figure 10 As shown, a third ring 302 is provided on the third slag discharge pipe 300. The third ring 302 is located on the top surface of the third slag discharge pipe 300, and the top surface of the third ring 302 is flush with the top surface of the third slag discharge pipe 300. A positioning post 301 is provided on the third ring 302. The positioning post 301 and the second limiting groove 109 cooperate with each other to ensure that the ash and slag can fall stably into the third slag discharge pipe 300. The bottom of the third slag discharge pipe 300 is connected to the slag discharge machine 601. The slag discharge machine 601 continuously discharges the ash and slag out of the device through its internal conveying mechanism, realizing the automation and high efficiency of the entire slag discharge process.

[0037] The working principle of this utility model: After biomass fuel is fed into the hopper 602, it falls into the furnace 603 under gravity for complete combustion. The high-temperature flue gas generated during combustion carries unburned fine particles upwards and enters the cyclone separator 604 for gas-solid separation. The separated solid particles are returned to the furnace 603 via the return feeder 605 for recirculation combustion, forming a highly efficient circulating fluidized combustion system. Non-combustible impurities such as ash enter the second ash pipe 100 through the first ash pipe 200 at the bottom of the furnace 603. Under the filtration of the filter cartridge 500, large impurities are trapped inside the filter cartridge 500, while fine ash falls through the filter holes into the third ash pipe 300.

[0038] After the filter cartridge 500 in the second slag pipe 100 traps a certain amount of large impurities, the drive mechanism 400 is started, driving the second slag pipe 100 to rotate around the first slag pipe 200, so that the filter cartridge 500 containing impurities rotates to a suitable position, at which time the filter cartridge 500 can be easily cleaned and replaced.

[0039] Meanwhile, due to the presence of two secondary slag discharge pipe bodies 101, when one filter cartridge 500 is cleaned or replaced, the other filter cartridge 500 can still operate normally, ensuring the continuity of the slag discharge process. This not only improves the fault tolerance of the device but also significantly enhances the overall stability of the system. The drive mechanism 400 achieves rapid switching of the filter cartridge 500 position by precisely controlling the rotation angle of the secondary slag discharge pipe 100, further improving the flexibility of equipment operation and maintenance efficiency.

[0040] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A biomass circulating fluidized combustion cogeneration device, characterized in that, The system includes a hopper (602), a furnace (603) connected to the hopper (602), a first slag discharge pipe (200) connected to the bottom of the furnace (603), a drive mechanism (400) installed on the first slag discharge pipe (200), a second slag discharge pipe (100) installed below the first slag discharge pipe (200), the second slag discharge pipe (100) connected to the drive mechanism (400), a third slag discharge pipe (300) installed below the second slag discharge pipe (100), and a slag discharge machine (601) installed below the third slag discharge pipe (300). A cyclone separator (604) is provided on one side of the furnace (603), and a return feeder (605) is provided below the cyclone separator (604). The second slag lowering pipe (100) includes a second slag lowering pipe body (101), and multiple second slag lowering pipe bodies (101) are provided. A first disc (102) is provided on one side of the second slag lowering pipe body (101). A filter cylinder (500) is provided inside the second slag lowering pipe body (101). The drive mechanism (400) drives the second slag pipe (100) to move.

2. The biomass circulating fluidized combustion cogeneration device according to claim 1, characterized in that, The first slag discharge pipe (200) includes a first slag discharge pipe body (201) fixedly connected to the bottom of the furnace (603). A first ring (202) is fixedly provided on the bottom surface of the first slag discharge pipe body (201). The inner ring of the first ring (202) is fixedly connected to the outer side of the first slag discharge pipe body (201), and the bottom surface of the first ring (202) is flush with the bottom surface of the first slag discharge pipe body (201). A coaxial cylindrical hole (204) is provided on the top surface of the first ring (202), and the driving mechanism (400) is located above the coaxial cylindrical hole (204).

3. A biomass circulating fluidized combustion cogeneration device according to claim 2, characterized in that, A first limiting post (203) is fixedly provided on the bottom surface of the first ring (202), and the phase difference between the center of the coaxial cylindrical hole (204) and the center of the first limiting post (203) is 180°.

4. A biomass circulating fluidized combustion cogeneration device according to claim 1, characterized in that, There are two second slag discharge pipe bodies (101). The second slag discharge pipe bodies (101) are located on one side of the first disc (102), and a second disc (107) is located on the other side of the second slag discharge pipe bodies (101). The two second slag discharge pipe bodies (101) are symmetrically arranged on the first disc (102), and the first disc (102) and the second disc (107) are symmetrically distributed along the centerline of the axial direction of the second slag discharge pipe bodies (101).

5. A biomass circulating fluidized combustion cogeneration device according to claim 4, characterized in that, A first limiting groove (103) is provided on the first disk (102). The first limiting groove (103) is semi-circular and is located at the edge of the first disk (102). A second limiting groove (109) is provided on the second disk (107). The second limiting groove (109) is semi-circular, and the first limiting groove (103) and the second limiting groove (109) are symmetrically distributed along the centerline of the axial direction of the second slag pipe body (101).

6. A biomass circulating fluidized combustion cogeneration device according to claim 1, characterized in that, A base (104) is provided on the top surface of the first disk (102). A circular hole is provided at the center of the base (104). The output shaft of the drive mechanism (400) is connected to the center of the first disk (102) through the circular hole at the center of the base (104).

7. A biomass circulating fluidized combustion cogeneration device according to claim 6, characterized in that, A plurality of circular grooves (106) are provided below the top surface of the base (104), and the plurality of circular grooves (106) are evenly distributed along the edge of the top surface of the base (104). A ball (105) is rolled inside the circular groove (106).

8. A biomass circulating fluidized combustion cogeneration device according to claim 5, characterized in that, A third ring (302) is provided on the third slag discharge pipe (300). The third ring (302) is located on the top surface of the third slag discharge pipe (300), and the top surface of the third ring (302) is flush with the top surface of the third slag discharge pipe (300).

9. A biomass circulating fluidized combustion cogeneration device according to claim 1, characterized in that, The second slag pipe body (101) is equipped with an installation ring (108).

10. A biomass circulating fluidized combustion cogeneration device according to claim 8, characterized in that, The third ring (302) is provided with a positioning post (301), and the positioning post (301) and the second limiting groove (109) cooperate with each other.

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