Yellow rod feeding system of biomass ash rod furnace

Abstract

The invention provides a yellow rod feeding system of a biomass ash rod furnace, and mainly relates to the field of feeding systems. A yellow rod feeding system of a biomass ash rod furnace comprises a main conveying line, a mounting frame is arranged above the downstream of the main conveying line, at least two compression boxes are arranged on the mounting frame, compression cavities are formed in the tops of the compression boxes, conical cavities are formed in the bottoms of the compression cavities, compression assemblies are arranged on the two sides in the compression cavities, and the sides, facing each other, of the compression assemblies are arc faces. A compression power unit is arranged between the compression assembly and the compression cavity, a power frame is arranged above the compression box, a spiral feeding shaft is rotationally arranged on the power frame, a conical feeding piece matched with the conical cavity is arranged at the bottom of the spiral feeding shaft, a linear feeding mechanism is arranged on the adjusting frame, an auxiliary conveying line is arranged above the feeding conveying belt, and a receiving bin is arranged below the mounting frame. A leading-out conveying belt is arranged at the bottom of the receiving bin. The fuel boiler has the beneficial effects that uniform proportioning and constant-speed conveying of yellow-stem fuel and grey-stem fuel are achieved, and the temperature uniformity of the fuel boiler is guaranteed.

Description

Technical Field

[0001] The invention mainly relates to the field of feeding systems, in particular to a biomass ash stalk furnace yellow stalk feeding system. Background Art

[0002] In recent years, all biomass power plants have begun to adjust their fuel structure, focusing on collecting and storing local straw and other yellow stalk fuels, and the proportion of straw as fuel has increased significantly. In order to adapt to the new fuel structure adjustment, further increase the amount of yellow stalk used in boilers, reduce the fuel's dependence on bark and wood blocks, and reduce production costs, it is urgent to optimize and improve the use of yellow stalk fuel in boilers.

[0003] At present, the feeding method adopted is to feed the gray stalk fuel and the yellow stalk fuel alternately. Since the density of straw is smaller than that of other fuels such as bark, the calorific value between the two is also different, and the conveying capacity of the conveyor belt cannot be kept consistent. At the same time, the feeding amount of the feeder in front of the furnace is also inconsistent, and it is difficult to control the connection between the gray stalk and the yellow stalk feeding. If the size of the feeder in front of the furnace is increased, it is easy for the gray stalk fuel to not be fully loaded and cause a conveying gap and uneven feeding. If the size of the feeder in front of the furnace is not increased, the yellow stalk fuel is prone to blockage. At the same time, the intermittent feeding of gray stalk fuel and yellow stalk fuel is easy to cause feeding interruption, which ultimately makes it difficult to control the heat of the boiler, which brings great passiveness to the increase in the use of yellow stalk in the boiler. Summary of the invention

[0004] In order to solve the deficiencies of the prior art, the present invention provides a biomass ash stalk furnace yellow stalk feeding system, which can realize the combustion of yellow stalk fuel filled in the ash stalk furnace at the same time, making the overall feeding continuous and providing convenience for the heat regulation of the boiler.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions: A biomass ash stalk furnace yellow stalk feeding system comprises a main conveying line, which is inclined, a mounting frame is arranged above the downstream of the main conveying line, at least two compression boxes are arranged on the mounting frame, a compression chamber is provided on the top of the compression box, a conical chamber is provided at the bottom of the compression chamber, a discharge port is provided at the bottom of the conical chamber, a pneumatic shear is arranged below the discharge port, a partition is arranged between the compression chamber and the conical chamber, a connecting hole is arranged on the partition, compression components are arranged on both sides of the compression chamber, the compression components have arc surfaces on one side facing each other, a compression power unit is arranged between the compression component and the compression chamber, and when the compression components on both sides are butt-jointed, a compression channel is formed between the two compression components, a power frame is arranged above the compression box, a spiral conveyor is arranged on the power frame for rotation A material shaft, a rotating power mechanism for driving the spiral feeding shaft to rotate is arranged on the power frame, a sizing spiral feeding piece adapted to the compression channel is arranged on the top of the spiral feeding shaft, a conical feeding piece adapted to the conical cavity is arranged at the bottom of the spiral feeding shaft, an adjusting frame is arranged above the mounting frame, a conveying frame is slidably arranged on the adjusting frame, a feeding conveyor belt is arranged on the conveying frame, a linear feeding mechanism for driving the conveying frame to slide back and forth along the adjusting frame is arranged on the adjusting frame, a secondary conveyor line is arranged above the feeding conveyor belt, the secondary conveyor line is arranged in an inclined manner, a material receiving bin is arranged below the mounting frame, a lead-out conveyor belt is arranged at the bottom of the material receiving bin, the downstream of the lead-out conveyor belt is located above the main conveyor line, a limit plate is arranged in the material receiving bin, and the limit plate is adapted to the lead-out conveyor belt.

[0006] A material baffle plate is arranged downstream of the main conveying line, the bottom of the material baffle plate is an arc surface, and an acute angle is formed between the material baffle plate and the main conveying line.

[0007] The compression components have chamfers on both sides, and the two sides of the compression components are fitted with the inner wall of the compression box. When the two compression components are butt-jointed, the joint between the two compression components is a notch.

[0008] The inner wall of the conical cavity is fitted with the conical feeding piece, and the contact edge between the conical feeding piece and the inner wall of the conical cavity is welded with hard alloy.

[0009] The linear feeding mechanism is a transmission chain mechanism, which is arranged along the adjustment frame, and the chain of the transmission chain mechanism is fixedly connected to the conveying frame.

[0010] The conveyor belt covers the bottom surface of the material receiving bin, and the downstream of the conveyor belt extends to the outside of the material receiving bin.

[0011] The compression power unit adopts a hydraulic cylinder, and the rotation power mechanism adopts a high-torque hydraulic motor.

[0012] After the main conveyor line passes through the material baffle plate, the gray rod material on the main conveyor line presents a concave state, and the lead-out conveyor belt continuously releases the compressed yellow rod material onto the concave gray rod.

[0013] Compared with the prior art, the beneficial effects of the present invention are: The present invention realizes volume compression of yellow stem fuel through a compression unit, and simultaneously continuously conveys the yellow stem fuel while compressing. The yellow stem fuel is laid on top of the gray stem fuel, so that the gray stem fuel and the yellow stem fuel are conveyed synchronously, thereby realizing mixed combustion of the gray stem fuel and the yellow stem fuel. In this feeding mode, the gray stem fuel and the yellow stem fuel are conveyed evenly, so that the conveyed fuel burns more evenly during combustion, the heat control is more stable, and the heat regulation of the filtration is more convenient.

[0014] Through the alternating compression of multiple units, the volume of yellow stem fuel can be compressed, thereby increasing its calorific value per unit volume. In this way, the blending of yellow stem fuel can be achieved without modifying the boiler, which provides the possibility of blending large amounts of yellow stem fuel in the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 It is a schematic diagram of the stereoscopic viewing angle structure of the present invention; Attached Figure 2 It is a schematic diagram of the main viewing angle structure of the present invention; Attached Figure 3 It is a schematic diagram of the structure of the present invention from a top view perspective; Attached Figure 4 It is a structural schematic diagram of the compression box of the present invention in non-compression / compression state; Attached Figure 5 It is a schematic diagram of a cross-sectional view of a compression box of the present invention; Attached Figure 6 It is a partial enlarged structural schematic diagram of part A of the present invention; Numbers shown in the accompanying drawings: 1. Main conveyor line; 2. Compression box; 3. Power frame; 4. Adjustment frame; 5. Auxiliary conveyor line; 6. Receiving bin; 7. Mounting frame; 8. Pneumatic shears; 11. Material baffle plate; 21. Compression chamber; 22. Conical chamber; 23. Partition; 24. Connecting hole; 25. Compression assembly; 26. Compression power unit; 27. Compression channel; 31. Screw feed shaft; 32. Rotating power mechanism; 33. Sizing screw feed sheet; 34. Conical feed sheet; 35. Guide plate; 41. Conveyor frame; 42. Feed conveyor belt; 43. Linear feed mechanism; 61. Export conveyor belt; 62. Limit plate. DETAILED DESCRIPTION

[0016] The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the application.

[0017] like Figure 1-6 As shown, a biomass ash stem furnace yellow stem feeding system described in the present invention includes a main conveyor line 1, which is inclined and is used to feed materials to the front feeder of the biomass boiler. In the prior art, materials are alternately released from the ash stem silo and the yellow stem silo to transport fuel into the boiler to complete the mixed combustion of the ash stem fuel and the yellow stem fuel.

[0018] In the present invention, in order to reduce the impact of low density of yellow stalk fuel on material transportation, the present invention adds a compression system upstream of the main conveying line 1 to compress the yellow stalk fuel to increase its density, thereby reducing the density difference between the yellow stalk fuel and the gray stalk fuel, so that the feeding amount during the feeding process is kept consistent as much as possible, reducing the feeding difference of the feeder in front of the furnace, and ensuring the uniformity of feeding and the temperature balance of the boiler. Furthermore, after the compression system is used to compress the yellow stalk, the material blocking mechanism can also be used to evenly mix the yellow stalk and gray stalk fuels, so that the yellow stalk and gray stalk fuels are fed synchronously according to a certain ratio, thereby ensuring the uniform and continuous transportation of biomass fuel, making the fuel ratio relatively consistent when feeding the boiler, and better ensuring the temperature uniformity of the boiler.

[0019] Specifically, a mounting frame 7 is provided above the downstream of the main conveying line 1, and at least two compression boxes 2 are provided on the mounting frame 7, and the compression boxes 2 are arranged longitudinally above the main conveying line 1. A compression chamber 21 is provided at the top of the compression box 2, and a conical chamber 22 is provided at the bottom of the compression chamber 21. A discharge port is provided at the bottom of the conical chamber 22, and the discharge port serves as the outlet for the compressed yellow rod fuel. A pneumatic shear 8 is provided below the discharge port, and the pneumatic shear 8 acts alternately to cut off the compressed and extruded yellow rod fuel. A partition 23 is provided between the compression chamber 21 and the conical chamber 22, and a connecting hole 24 is provided on the partition 23, and the connecting hole 24 serves as a connecting hole between the compression chamber 21 and the yellow rod compressed fuel in the conical chamber 22.

[0020] Compression components 25 are arranged on both sides of the compression chamber 21, and the compression components 25 have arc surfaces on one side facing each other. A compression power unit 26 is arranged between the compression component 25 and the compression chamber 21. When the compression components 25 on both sides are docked, a compression channel 27 is formed between the two compression components 25. The compression channel 27 is a cylindrical channel as a whole. The compression power unit 26 is preferably a hydraulic cylinder, and the yellow rod fuel introduced therein is initially and quickly extruded by driving the hydraulic cylinder. More specifically, the compression component 25 has chamfers on both sides, so that the two side edges of the compression component 25 are blade-shaped, and the two sides of the compression component 25 fit the inner wall of the compression box 2. When the two compression components 25 are docked, the yellow rod fuel can be avoided from being clamped between the two side walls of the two compression components 25, so that the formation of the compression channel 27 is more stable. The joint of the two compression components 25 after docking is a notch, and the notch is triangular, which can squeeze the yellow rod fuel in the direction of the compression channel 27, so as to achieve stable docking of the two compression components 25.

[0021] A power frame 3 is arranged above the compression box 2, and the power frame 3 is fixedly connected to the mounting frame 7. A spiral feed shaft 31 is rotatably mounted on the power frame 3, and a rotating power mechanism 32 for driving the spiral feed shaft 31 to rotate is installed on the power frame 3. In the present embodiment, the rotating power mechanism 32 adopts a high-torque hydraulic motor. The hydraulic motor has a low rotation speed, but can burst out a higher torque, so as to more effectively transport the compressed yellow rod fuel. A sizing spiral feed sheet 33 adapted to the compression channel 27 is arranged at the top of the spiral feed shaft 31, and the diameter of the sizing spiral feed sheet 33 is slightly smaller than the inner diameter of the compression channel 27. A conical feed sheet 34 matched with the conical cavity 22 is arranged at the bottom of the spiral feed shaft 31. In the present embodiment, the conical feed sheet 34 fits the inner wall of the conical cavity 22, and the conical cavity 22 is used to limit the conical feed sheet 34, thereby ensuring the stable rotation of the spiral feed shaft 31. More specifically, the contact edge of the conical feeding piece 34 and the inner wall of the conical cavity 22 is welded with hard alloy. The setting of the hard alloy makes the conical feeding piece 34 more wear-resistant, and at the same time of realizing the far end limit of the spiral feeding shaft 31, the service life of the conical feeding piece 34 is improved.

[0022] An adjustment frame 4 is arranged above the mounting frame 7, and the adjustment frame 4 can be fixedly connected to the mounting frame 7, or can be installed on the ceiling by means of a top hanging method. A conveying frame 41 is slidably arranged on the adjustment frame 4. Specifically, the adjustment frame 4 has an adjustment slide rail, and the conveying frame 41 has a sliding pair that slides with the adjustment slide rail. A feed conveyor belt 42 is arranged on the conveying frame 41, and a linear feed mechanism 43 for driving the conveying frame 41 to slide back and forth along the adjustment frame 4 is arranged on the adjustment frame 4. Specifically, the linear feed mechanism 43 is a transmission chain mechanism, and the transmission chain mechanism 43 is arranged along the adjustment frame 4, and the chain of the transmission chain mechanism 43 is fixedly connected to the conveying frame 41. The transmission chain mechanism 43 is driven by a servo motor, and driven by the servo motor, the transmission chain mechanism 43 can be used to move the conveying frame 41 to any position of the adjustment frame 4, thereby realizing the material transportation of the yellow rod fuel to different compression boxes 2 below. More specifically, the conveying frame 41 has transmission rollers at both ends, one of which is an active roller driven by a motor, and a feed conveyor belt 42 is tensioned between the two transmission rollers. An auxiliary conveyor line 5 is arranged above the feed conveyor belt 42. The auxiliary conveyor line 5 is arranged at an angle. The auxiliary conveyor line 5 is used to convey yellow rod fuel to the feed conveyor belt 42. Through the adjustment of the linear feeding mechanism 43, the feed conveyor belt 42 is driven to convey the yellow rod fuel to any compression box 2.

[0023] More specifically, in order to prevent the feed conveyor belt 42 from interfering with the rotating power mechanism 32 during the conveying process of the yellow rod material, the present invention arranges a conical guide plate 35 on the top of the power frame 3. The guide plate can protect the rotating power mechanism 32 and guide the yellow rod material so that it can be smoothly and evenly distributed in the compression box 2.

[0024] In this embodiment, the auxiliary conveyor line 5 and the main conveyor line 1 both use belt feeders. The auxiliary conveyor line 5 is used to convey the yellow stalk fuel such as straw that has been initially crushed.

[0025] A receiving bin 6 is provided below the mounting frame 7. The receiving bin 6 receives the compressed materials in each compression box 2, so that the receiving bin 6 serves as a buffer bin for the compressed yellow rod fuel. A lead-out conveyor belt 61 is provided at the bottom of the receiving bin 6. The downstream of the lead-out conveyor belt 61 is located above the main conveying line 1. A limit plate 62 is provided in the receiving bin 6, and the limit plate 62 is slightly higher than the lead-out conveyor belt 61. Specifically, the conveyor belt 61 covers the bottom surface of the receiving bin 6, and the downstream of the conveyor belt 61 extends to the outside of the receiving bin 6. The lead-out conveyor belt 61 is used to transport the compressed yellow rod fuel received in the receiving bin 6, and transport it to the main conveying line 1 and evenly drop it. The limit plate 62 is used to regulate the lead-out flow of the lead-out conveyor belt 61, so that the yellow rod fuel can be evenly led to the gray rod fuel transported on the main conveying line 1, thereby ensuring a uniform ratio of the yellow rod and gray rod fuel.

[0026] Furthermore, a baffle plate 11 is provided downstream of the main conveyor line 1, and the bottom of the baffle plate 11 is an arc surface, and an acute angle is formed between the baffle plate 11 and the main conveyor line 1. The function of the baffle plate 11 is similar to that of the limit plate 62, both of which are to limit the material on the conveyor belt. However, there are more particles of gray rod material conveyed on the main conveyor line 1. In this embodiment, the bottom of the baffle plate 11 is designed as an arc surface structure, which cooperates with the shape of the conveyor belt of the main conveyor line 1, so that after passing through the baffle plate 11, the gray rod fuel on the main conveyor line 1 presents an inward concave state with a low middle and high sides, and the outlet conveyor belt 61 continuously releases the compressed yellow rod material onto the concave gray rod. The gray rod fuel with a concave arc surface shape can better receive the yellow rod compressed fuel exported by the outlet conveyor belt 61, so that the compressed yellow rod fuel can be stably laid on the gray rod fuel, thereby ensuring the uniform configuration of the gray rod fuel and the yellow rod fuel.

[0027] Specifically, when the gray stalk fuel boiler is mixed with yellow stalk fuel for power generation, the feeding system is used for feeding, which mainly includes the following steps: First, the main conveyor line 1 conveys the gray rod fuel stably, and the auxiliary conveyor line 5 conveys the yellow rod fuel that has been initially crushed. The yellow rod fuel is alternately conveyed to multiple compression boxes 2 through the feed conveyor belt 42. The multiple compression boxes 2 act alternately, and the initial compression of the yellow rod fuel is completed through the compression assembly 25. Then, the spiral feed shaft 31 rotates, and the diameter of the compression channel 27 changes to the inner diameter of the conical cavity 22, completing the secondary compression of the yellow rod fuel, and finally being led out of the discharge port, and the extruded fuel is cut off through the pneumatic shear 8. The compressed and sheared block yellow rod fuel is conveyed by the output conveyor belt 61, and after the flow control of the limit plate 62, it falls evenly on the main conveyor line 1, realizing the synchronous mixing and feeding of the gray rod fuel and the yellow rod fuel, so that the ratio of the gray rod fuel and the yellow rod fuel is constant, and the feeding flow of the boiler's front furnace feeder is uniform, which can ensure the constant calorific value of the boiler's fuel, ensure the continuous transportation of the fuel, and ensure the constant temperature of the boiler.

Claims

1. A biomass ash stalk furnace yellow stalk feeding system, comprising a main conveying line (1), wherein the main conveying line (1) is arranged inclined, and is characterized in that: A mounting frame (7) is arranged above the downstream of the main conveying line (1), and at least two compression boxes (2) are arranged on the mounting frame (7). The top of the compression box (2) has a compression chamber (21), and the bottom of the compression chamber (21) is provided with a conical chamber (22). The bottom of the conical chamber (22) has a discharge port, and a pneumatic shear (8) is arranged below the discharge port. A partition (23) is arranged between the compression chamber (21) and the conical chamber (22), and a connecting hole (24) is arranged on the partition (23). The compression chamber (21) is provided with a connecting hole (24). ) are provided on both sides thereof, the compression components (25) are arc-shaped surfaces on the sides facing each other, a compression power unit (26) is provided between the compression components (25) and the compression chamber (21), and when the compression components (25) on both sides are butted, a compression channel (27) is formed between the two compression components (25), a power frame (3) is provided above the compression box (2), a spiral feed shaft (31) is rotatably provided on the power frame (3), and a device for driving the spiral feed shaft is provided on the power frame (3). (31) is provided with a rotating power mechanism (32) for rotating, a sizing spiral feeding piece (33) adapted to the compression channel (27) is provided at the top of the spiral feeding shaft (31), a conical feeding piece (34) adapted to the conical cavity (22) is provided at the bottom of the spiral feeding shaft (31), an adjusting frame (4) is provided above the mounting frame (7), a conveying frame (41) is slidably provided on the adjusting frame (4), a feeding conveying belt (42) is provided on the conveying frame (41), and a driving conveyor (42) is provided on the adjusting frame (4). A linear feeding mechanism (43) is provided for reciprocatingly sliding along the adjusting frame (4) along the frame (41); a secondary conveyor line (5) is arranged above the feeding conveyor belt (42); the secondary conveyor line (5) is arranged in an inclined manner; a receiving bin (6) is arranged below the mounting frame (7); a lead-out conveyor belt (61) is arranged at the bottom of the receiving bin (6); the downstream of the lead-out conveyor belt (61) is located above the main conveyor line (1); a limit plate (62) is arranged in the receiving bin (6); the limit plate (62) is adapted to the lead-out conveyor belt (61).

2. A biomass ash rod furnace yellow rod feeding system according to claim 1, characterized in that: A material baffle plate (11) is arranged downstream of the main conveying line (1), the bottom of the material baffle plate (11) is a curved surface, and an acute angle is formed between the material baffle plate (11) and the main conveying line (1).

3. The yellow rod feeding system for biomass ash rod furnace according to claim 1 is characterized by: Both sides of the compression component (25) are chamfered, and both sides of the compression component (25) fit with the inner wall of the compression box (2). When the two compression components (25) are butt-jointed, the joint between the two compression components (25) is a notch.

4. The biomass ash rod furnace yellow rod feeding system according to claim 1 is characterized by: The inner wall of the conical cavity (22) is fitted with the conical feeding piece (34), and the contact edge between the conical feeding piece (34) and the inner wall of the conical cavity (22) is welded with hard alloy.

5. The yellow rod feeding system for biomass ash rod furnace according to claim 1 is characterized by: The linear feeding mechanism (43) is a transmission chain mechanism, the transmission chain mechanism (43) is arranged along the adjustment frame (4), and the chain of the transmission chain mechanism (43) is fixedly connected to the conveying frame (41).

6. The yellow rod feeding system for biomass ash rod furnace according to claim 1 is characterized by: The conveyor belt (61) covers the bottom surface of the material receiving bin (6), and the downstream of the conveyor belt (61) extends to the outside of the material receiving bin (6).

7. The biomass ash rod furnace yellow rod feeding system according to claim 1, characterized in that: The compression power unit (26) adopts a hydraulic cylinder, and the rotation power mechanism (32) adopts a high-torque hydraulic motor.

8. The yellow rod feeding system for biomass ash rod furnace according to claim 2 is characterized by: After the main conveyor line (1) passes through the material blocking plate (11), the gray rod material on the main conveyor line (1) presents a concave state, and the lead-out conveyor belt (61) continuously releases the compressed yellow rod material onto the concave gray rod.

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