Uniform fuel mixing device for thermal power plant

Abstract

The utility model relates to the technical field, and discloses a thermal power plant fuel uniform mixing device which comprises a boiler, a feeding hopper is installed at the top of the boiler, a discharging mechanism is arranged on one side of the feeding hopper, a top plate is connected to the surface of the bottom end of the boiler in a sleeved mode, supporting legs are installed on the periphery of the bottom of the top plate, and supporting plates are installed among the supporting legs. Driving mechanisms are arranged on the two sides of the supporting plate. According to the utility model, a rotatable spiral blade structure is additionally arranged at the feeding hopper through the discharging mechanism, combustion fuel is discharged into the feeding hopper through the feeding block, the driving motor is started to drive the driving rod to rotate, and the driving rod drives the spiral blade to enable the fuel to uniformly enter the boiler through the opening of the feeding hopper; meanwhile, a liftable driving mechanism is arranged outside, a screw rod and a sliding block are driven by a double-shaft motor to transmit, and the sliding block drives a lifting block to obliquely move at a guide rod, so that a supporting plate structure is driven to lift.

Description

Technical Field

[0001] This utility model relates to the field of fuel processing technology for thermal power plants, and in particular to a device for uniformly mixing fuels in thermal power plants. Background Technology

[0002] Fuel for power generation generally refers to the fuel required by thermal power plants to produce electricity. Thermal power plant fuels are broadly classified into solid fuels, liquid fuels, and gaseous fuels based on their form. Solid fuel is mainly coal. Coal consists of carbon, ash, moisture, and volatile matter. Liquid fuel is mainly heavy oil, which is the oil remaining after refining gasoline, kerosene, diesel, etc., from petroleum in oil refineries. Heavy oil is a high-quality fuel for power generation, with very low ash and moisture content. Gaseous fuel is mainly natural gas, as well as coke oven gas and blast furnace gas.

[0003] A search of Chinese literature (publication number CN220361047U) reveals a fuel mixing device, relating to the field of fuel processing technology for thermal power plants. The device includes a main body with a motor mounted on its upper end. A connecting rod is fixedly installed at the output end of the motor. The main body has a ventilation slot and an air inlet at its upper end. A circular hole is formed at the bottom of the ventilation slot, and a rotating block is rotatably connected inside the hole. A frustum-shaped groove is formed at the upper end of the rotating block, and the inner wall of the groove is fixed to the outer side of the connecting rod. A rotating rod is fixedly installed at the lower end of the rotating block, and a second ventilation slot is formed at the upper end of the rod. In this invention, the rotating block and the frustum-shaped hole allow the device to simultaneously stir the fuel and introduce hot air into various parts of the fuel within the device. This accelerates the evaporation of internal water vapor, reducing the probability of fuel agglomeration and thus improving the efficiency of the mixing device.

[0004] Because the device only has an internal stirring unit and not one at the inlet, uneven feeding occurs, affecting combustion stability and safety. Furthermore, the device lacks height adjustment, making it unsuitable for different usage scenarios. The stirring components are all rigid structures, which are prone to cracking at the connection between the stirring blades and the rotating rod during prolonged stirring. To address these issues, a fuel mixing device for thermal power plants is provided. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a fuel mixing and homogenization device for thermal power plants, which aims to improve the existing technology's lack of height adjustment and uniform mixing function at the feed inlet.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a fuel mixing and homogenization device for a thermal power plant, comprising a boiler, a feeding funnel installed on the top of the boiler, a feeding mechanism provided on one side of the feeding funnel, a top plate sleeved on the bottom surface of the boiler, support legs installed around the bottom of the top plate, support plates installed between the support legs, drive mechanisms provided on both sides of the support plates, and a stirring mechanism installed inside the boiler.

[0007] As a further description of the above technical solution:

[0008] The feeding mechanism includes a support rod, a rectangular plate is mounted on the top of the support rod, a stirring drive motor is installed through the top of the rectangular plate, the drive motor is connected to a drive rod through the rectangular plate, a spiral blade is connected to the bottom of the drive rod, a feed block is fixedly installed at the front end of the rectangular plate, the bottom outlet of the feed block corresponds to the feed funnel, and the spiral blade is installed at the feed hole of the feed funnel.

[0009] As a further description of the above technical solution:

[0010] The drive mechanism includes a dual-axis motor, which is embedded in both sides of the support plate. One end of the dual-axis motor is connected to a lead screw with symmetrical threads. A slider is helically driven on the outer surface of the lead screw. A lifting block is fixedly installed on the surface of the slider and is movably connected to the support leg.

[0011] As a further description of the above technical solution:

[0012] The surface of the outrigger has grooves, and a guide rod is provided in the groove of the outrigger. The lifting block is sleeved on the guide rod, and the dual-axis motor has a built-in brake function.

[0013] As a further description of the above technical solution:

[0014] The stirring mechanism includes a stirring motor, which is installed on one side of the boiler. The output end of the stirring motor extends into the interior of the boiler and is connected to a worm gear. A worm wheel is connected to the surface of the worm gear, and a rotating rod is fixedly sleeved inside the worm wheel. Stirring rollers are provided on both sides of the rotating rod.

[0015] As a further description of the above technical solution:

[0016] Clamping blocks are installed on both sides of the stirring rod, and torsion springs are provided through each other between the clamping blocks. The torsion springs are connected through the stirring rod. Several spring bodies are installed on both sides of the stirring rod, and a spring block is installed at one end of each spring body.

[0017] As a further description of the above technical solution:

[0018] The boiler has an ash discharge chamber through the support plate, and an ash collection box is installed on the support plate corresponding to the ash discharge chamber.

[0019] This utility model has the following beneficial effects:

[0020] 1. In this utility model, a rotatable spiral blade structure is added to the feeding hopper by setting a feeding mechanism. The fuel is fed into the feeding hopper by the feeding block. The drive motor is started to drive the drive rod to rotate. The drive rod drives the spiral blade to evenly feed the fuel into the boiler through the opening of the feeding hopper, thereby improving the overall mixing uniformity. At the same time, a lifting drive mechanism is set on the outside. The screw and slider are driven by a dual-axis motor. The slider drives the lifting block to move obliquely at the guide rod, thereby lifting the support plate structure.

[0021] 2. In this utility model, the internal mixing of fuel is improved by the built-in stirring mechanism. The stirring motor drives the worm gear and the worm wheel to drive the rotating rod to rotate. The rotating rod drives the stirring rod connected by the clamping block and the torsion spring to rotate. When the stirring rod comes into contact with the fuel, it can be supported by the elasticity of the torsion spring and swing gently, thereby effectively solving the wear of the connection point caused by hard contact. The spring body drives the spring block to enhance the stirring effect and efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a fuel mixing and homogenization device for a thermal power plant proposed in this utility model.

[0023] Figure 2 This is a cross-sectional view of a fuel mixing and homogenization device for a thermal power plant proposed in this utility model;

[0024] Figure 3 This is an enlarged schematic diagram of section A of the fuel mixing and homogenization device for a thermal power plant proposed in this utility model;

[0025] Figure 4 This is a schematic diagram of the drive mechanism of a fuel mixing and homogenization device for thermal power plants proposed in this utility model;

[0026] Figure 5 This is a schematic diagram of the feeding mechanism of a fuel mixing and homogenization device for thermal power plants proposed in this utility model;

[0027] Legend:

[0028] 1. Boiler; 2. Feed hopper; 3. Discharge mechanism; 301. Support rod; 302. Rectangular plate; 303. Drive motor; 304. Drive rod; 305. Spiral blade; 306. Feed block; 4. Top plate; 5. Support leg; 6. Support plate; 7. Drive mechanism; 701. Dual-shaft motor; 702. Lead screw; 703. Slider; 704. Lifting block; 8. Stirring mechanism; 801. Stirring motor; 802. Worm; 803. Worm wheel; 804. Rotating rod; 805. Stirring roller; 9. Guide rod; 10. Clamping block; 11. Torsion spring; 12. Spring body; 13. Spring block; 14. Ash discharge chamber; 15. Ash collection box. Detailed Implementation

[0029] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figure 1-5 An embodiment of this utility model is provided: a fuel mixing device for a thermal power plant, including a boiler 1, a feeding hopper 2 installed on the top of the boiler 1, a feeding mechanism 3 provided on one side of the feeding hopper 2, a top plate 4 sleeved on the bottom surface of the boiler 1, support legs 5 installed around the bottom of the top plate 4, support plates 6 installed between the support legs 5, a drive mechanism 7 provided on both sides of the support plate 6, and a stirring mechanism 8 installed inside the boiler 1.

[0031] The feeding mechanism 3 includes a support rod 301, a rectangular plate 302 is mounted on the top of the support rod 301, a stirring drive motor 303 is installed through the top of the rectangular plate 302, the drive motor 303 is connected to a drive rod 304 through the rectangular plate 302, a spiral blade 305 is connected to the bottom of the drive rod 304, a feed block 306 is fixedly installed at the front end of the rectangular plate 302, the bottom outlet of the feed block 306 corresponds to the feed funnel 2, and the spiral blade 305 is installed at the feed hole of the feed funnel 2.

[0032] The drive mechanism 7 includes a dual-axis motor 701, which is embedded in both sides of the support plate 6. One end of the dual-axis motor 701 is connected to a lead screw 702 with symmetrical threads. The outer surface of the lead screw 702 is helically driven by a slider 703. A lifting block 704 is fixedly installed on the surface of the slider 703. The lifting block 704 is movably connected to the support leg 5.

[0033] The surface of the outrigger 5 has grooves, and a guide rod 9 is provided in the groove of the outrigger 5. The lifting block 704 is sleeved on the guide rod 9, and the dual-axis motor 701 has built-in brake characteristics.

[0034] The stirring mechanism 8 includes a stirring motor 801, which is installed on one side of the boiler 1. The output end of the stirring motor 801 extends into the interior of the boiler 1 and is connected to a worm gear 802. A worm wheel 803 is connected to the surface of the worm gear 802. A rotating rod 804 is fixedly sleeved inside the worm wheel 803. Stirring rollers 805 are provided on both sides of the rotating rod 804.

[0035] Clamping blocks 10 are installed on both sides of the stirring rod 805. Torsion springs 11 are provided through each other in the clamping blocks 10. The torsion springs 11 are connected through the stirring rod 805. Several spring bodies 12 are installed on both sides of the stirring rod 805. A spring block 13 is installed at one end of the spring body 12.

[0036] The boiler 1 is provided with an ash discharge chamber 14 through the support plate 6, and an ash collection box 15 is installed on the support plate 6 corresponding to the ash discharge chamber 14.

[0037] Specifically, fuel combustion is performed in boiler 1 to generate heat energy. This heat energy is absorbed by water and converted into steam, generating thrust for subsequent thermal power conversion. Fuel is transported into boiler 1 via feed hopper 2, and fed into feed hopper 2 via feed block 306 via feeding mechanism 3. Drive motor 303 is fixedly supported by support rod 301 and rectangular plate 302. Starting drive motor 303 rotates drive rod 304, which in turn rotates spiral blade 305. The feed hopper 2 rotates at its opening, evenly sweeping fuel into the boiler. The boiler 1 is then supported by the top plate 4, legs 5, and support plate 6. The support plate 6 can be lifted via the drive mechanism 7. A dual-axis motor 701 is installed in the center of the grooves on both sides of the support plate 6. The two ends of the dual-axis motor 701 are symmetrically connected to lead screws 702. Starting the dual-axis motor 701 drives the lead screws 702 to rotate. In this rotating state, the lead screws 702 drive the slider 703 to move laterally back and forth on its surface via a screw drive principle. The slider 703 moves synchronously with the lifting block 704, causing the lifting block 704 to move at the guide rod 9. The guide rod 9 is installed in the inner groove of the support leg 5, which is positioned diagonally in a V-shape. This allows the lifting block 704 to slide at the guide rod 9 as it moves to both sides, thereby raising the height of the support plate 6. Through the brake setting of the dual-axis motor 701, the lead screw 702 and the brake can be locked after power failure, completing the height limit. By starting the stirring motor 801, the worm gear 802 is driven to rotate. The worm gear 802 drives the worm gear through the transmission principle. The worm gear 803 rotates, which drives the rotating rod 804 to rotate. The rotating rod 804 drives the stirring rod 805 to uniformly stir the fuel in the boiler 1. During the stirring process, the thrust generated when the fuel contacts the stirring rod 805 can be driven by the torsion spring 1 to swing, which solves the problem that the existing technology cannot remove the wear of the stirring structure connection caused by the thrust. The stirring effect is increased by the spring block 13 driven by the spring lift 12. Finally, the fuel waste is transported to the ash collection box 15 through the ash discharge chamber 14. The waste can be dumped by opening the cover plate at the front end of the ash collection box 15.

[0038] Working principle: During operation, fuel is placed into the feed block 306, which transports it to the opening of the feed hopper 2. The drive motor 303 is started, rotating the drive rod 304. The drive rod 304 drives the spiral blades 305 to evenly sweep the fuel, ensuring it passes evenly through the feed hopper 2 into the boiler 1. The stirring motor 801 is started, rotating the worm gear 802. The worm gear 802 drives the worm wheel 803, which in turn drives the rotating rod 804. The rotating rod 804 then drives the stirring roller 805, resulting in uniform mixing of the fuel. The torsion spring 11 provides elasticity... The stirring roller 805 is driven to swing laterally, and is supported by spring 12 at the spring block 13. The spring block 13 contacts the fuel for secondary stirring. Finally, the waste material after combustion is transported to the ash collection box 15 through the ash discharge chamber 14. The dual-shaft motor 701 drives the lead screw 702 to rotate. The lead screw 702 drives the slider 703 to move laterally on its surface. The slider 703 drives the lifting block 704 to move to both sides. The guide rod 9 drives the lifting block 704 to be lifted. The lifting block 704 drives the support plate 6 to be lifted. The support plate 6 drives the boiler 1 structure to be lifted, adapting to different height requirements.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fuel mixing and homogenization device for a thermal power plant, comprising a boiler (1), characterized in that: The boiler (1) is equipped with a feeding hopper (2) on the top, and a feeding mechanism (3) is provided on one side of the feeding hopper (2). A top plate (4) is sleeved on the bottom surface of the boiler (1). Support legs (5) are installed around the bottom of the top plate (4). Support plates (6) are installed between the support legs (5). A drive mechanism (7) is provided on both sides of the support plate (6). A stirring mechanism (8) is installed inside the boiler (1).

2. The fuel mixing and homogenization device for thermal power plants according to claim 1, characterized in that: The feeding mechanism (3) includes a support rod (301), a rectangular plate (302) is installed on the top of the support rod (301), a stirring drive motor (303) is installed through the top of the rectangular plate (302), the drive motor (303) is connected to a drive rod (304) through the rectangular plate (302), a spiral blade (305) is connected to the bottom of the drive rod (304), a feed block (306) is fixedly installed at the front end of the rectangular plate (302), the bottom outlet of the feed block (306) corresponds to the feed funnel (2), and the spiral blade (305) is installed at the feed hole of the feed funnel (2).

3. The fuel mixing and homogenization device for thermal power plants according to claim 2, characterized in that: The drive mechanism (7) includes a dual-axis motor (701), which is embedded in both sides of the support plate (6). One end of the dual-axis motor (701) is connected to a lead screw (702) with symmetrical threads. The outer surface of the lead screw (702) is helically driven by a slider (703). A lifting block (704) is fixedly installed on the surface of the slider (703). The lifting block (704) is movably connected to the support leg (5).

4. The fuel mixing and homogenization device for thermal power plants according to claim 3, characterized in that: The surface of the support leg (5) has grooves, and a guide rod (9) is provided in the groove of the support leg (5). The lifting block (704) is sleeved on the guide rod (9), and the dual-axis motor (701) has built-in brake characteristics.

5. The fuel mixing and homogenization device for thermal power plants according to claim 1, characterized in that: The stirring mechanism (8) includes a stirring motor (801), which is installed on one side of the boiler (1). The output end of the stirring motor (801) extends into the interior of the boiler (1) and is connected to a worm gear (802). A worm wheel (803) is connected to the surface of the worm gear (802). A rotating rod (804) is fixedly sleeved inside the worm wheel (803). Stirring rods (805) are provided on both sides of the rotating rod (804).

6. The fuel mixing and homogenization device for thermal power plants according to claim 5, characterized in that: Clamping blocks (10) are installed on both sides of the stirring rod (805). Torsion springs (11) are provided through each other between the clamping blocks (10). The torsion springs (11) are connected through the stirring rod (805). Several spring bodies (12) are installed on both sides of the stirring rod (805). A spring block (13) is installed at one end of each spring body (12).

7. The fuel mixing and homogenization device for thermal power plants according to claim 1, characterized in that: The boiler (1) has an ash discharge chamber (14) through the support plate (6), and an ash collection box (15) is installed on the support plate (6) corresponding to the ash discharge chamber (14).

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