Thermal power plant fuel processing device

Abstract

The invention relates to the technical field of fuel processing devices, in particular to a thermal power plant fuel processing device which comprises a crushed material conveying part and a first conveying belt, and the crushed material conveying part comprises a pulverized coal crushing bin and a crushed material knife roll which are mounted on a mounting frame; the mixing assembly is mounted at the discharging end of the first conveying belt; the shaping and briquetting part comprises a material guiding assembly installed at the discharging end of the material mixing assembly and a shaping assembly, and a briquetting transmission assembly is arranged between the material guiding assembly and the shaping assembly; an arranged crushed material conveying part is matched with a material mixing assembly, so that the material mixing operation of crushed biomass materials and pulverized coal can be realized, the compactness of a mixed material is improved, and gaps of the crushed biomass materials are compressed; the actions of continuous feeding, material pressing and molded fuel block pushing can be realized through the shaping and pressing part, and the actions are matched with the rotation of the pressing mold disc to realize cyclic continuous operation; on the whole, the device is high in continuous operation efficiency and high in reliability, and the action that biomass raw materials and pulverized coal are mixed and then compacted and mixed fuel blocks can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of fuel processing devices, and in particular to a fuel processing device for a thermal power plant. Background Art

[0002] In the current operation of thermal power plants, the optimization of fuel processing technology is crucial to improving power generation efficiency and reducing costs. Traditional thermal power plants mainly use pulverized coal as fuel. However, the use of pulverized coal alone not only faces the problems of limited coal resources and large price fluctuations, but also produces high pollutant emissions during the combustion process. Therefore, in order to seek more environmentally friendly and sustainable energy solutions, biomass fuels are gradually gaining attention due to their renewable, low carbon content, and low combustion pollution.

[0003] Biomass fuel comes from a wide range of sources, such as crop straw, hay, leaves, etc.; however, biomass fuel has various shapes and a loose texture, and there are many difficulties in using it directly for combustion in thermal power plants: on the one hand, its combustion speed is too fast and unstable, making it difficult to meet the needs of thermal power plants for continuous and stable power generation; on the other hand, the energy density generated by burning biomass fuel alone is low and cannot meet the standards for efficient operation of thermal power plants.

[0004] In order to solve the above problems, it is considered how to mix biomass fuel with coal powder to obtain fuel blocks with dense texture and stable combustion; that is, the biomass fuel needs to be crushed to make its particle size match that of coal powder, and then evenly mixed and reshaped into blocks. The addition of biomass fuel can reduce the overall carbon content of the mixed fuel and reduce the emission of pollutants such as carbon dioxide during combustion; and the mixed fuel after shaping and briquetting has a more stable physical structure and uniform energy distribution, which can achieve more complete and uniform combustion during the combustion process, thereby improving combustion efficiency and providing thermal power plants with stable and efficient energy output; therefore, the development of a device for processing mixed fuels of biomass fuel and coal powder is of great significance to the benefits of thermal power plants. In view of this, we propose a fuel processing device for thermal power plants. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies mentioned in the above background technology and provide a fuel processing device for a thermal power plant.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A fuel processing device for a thermal power plant, comprising:

[0008] A crushing material conveying section, comprising a coal powder crushing bin and a crushing knife roller mounted on a mounting frame, and a first conveying belt for conveying crushed coal and biomass;

[0009] A mixing assembly, installed at the discharge end of the first conveyor belt, for receiving and mixing crushed coal and biomass;

[0010] The shaping block pressing part comprises a material guiding component installed at the material discharging end of the mixing component and a shaping component for obtaining a shaped fuel block, and a block making transmission component is arranged between the material guiding component and the shaping component.

[0011] Preferably, the material guiding assembly comprises a material receiving tank with a second material receiving port and a material discharging port respectively provided on the side wall and the bottom surface, and a tank cover is detachably mounted on the material receiving tank;

[0012] A central shaft is rotatably mounted at the axis of the receiving tank through a driving motor, and a scraper plate is mounted on the central shaft.

[0013] Preferably, the molding assembly comprises a tray fixedly mounted by a support rod, and a die plate rotatably mounted above the tray and horizontally attached to the bottom surface of the receiving tank;

[0014] A support plate is installed at the outer wall of the bottom of the receiving tank, and a stepping motor for coaxially connecting the die plate is installed on the support plate.

[0015] Preferably, the die plate is provided with at least two groups of evenly distributed molding cavities, and the molding cavities are used to receive the mixed fuel corresponding to the positions of the discharge ports;

[0016] The tray is provided with an opening which is offset from the discharge port and is used for extruding the molded fuel blocks in the molding cavity.

[0017] Preferably, the shaping block portion comprises a mounting seat provided with a top plate, the material guide assembly is fixedly mounted on the top plate, and the shaping assembly is mounted in the mounting seat via the support rod;

[0018] The mounting seat is provided with a side vertical plate, the side vertical plate is provided with a lifting slot, a horizontal plate is slidably installed in the lifting slot, and prisms for preventing deflection are provided at both ends of the horizontal plate.

[0019] Preferably, an insertion rod corresponding to the position of the molding cavity is installed below the horizontal plate, and a pressure plate for pressing the fuel block is installed at the bottom end of the insertion rod.

[0020] Preferably, the block-making transmission assembly comprises a first bevel gear mounted on the bottom end of the middle shaft, and a shaft with second gears mounted coaxially at both ends, and the second bevel gear is mounted on the shaft;

[0021] The first bevel gear is meshed with the second bevel gear and installed, and the shaft is rotatably installed on the mounting seat;

[0022] The second gear is meshed with the first gear, a latch is eccentrically mounted on the first gear, and a transmission connecting plate is rotatably mounted between the latch and the prism.

[0023] Preferably, the tray is provided with a waste discharge port which is offset from the material discharge port and located at the front end of the open rotation, and a socket plate is installed at the waste discharge port;

[0024] A through-hole vertical rod is provided on the bottom surface of the pressure plate corresponding to the jack plate.

[0025] Preferably, a feeding crawler for conveying the biomass to be crushed is installed on the mounting frame, and a biomass silo is installed on the mounting frame at the input end of the feeding crawler;

[0026] The crushing knife roller is rotatably mounted on the discharge end of the feeding crawler;

[0027] The coal powder crushing bin is provided with a crushing roller inside and a material guide port at the bottom;

[0028] The first conveyor belt input end is arranged below the material-crushing knife roller and the material guide port.

[0029] Preferably, the mounting frame is provided with a material collection port at the discharge end of the first conveyor belt;

[0030] The mixing component comprises a feed pipe with an auger rotatably installed inside, the feed pipe is provided with a first material receiving port for installation at the material collecting port, and a discharge port is installed at the discharge end of the feed pipe.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The fuel processing device of the thermal power plant can achieve the mixing operation of biomass crushed materials and coal powder through the crushed material conveying part and the mixing component, improve the density of the mixture, and compress the gaps between the biomass crushed materials; through the shaping and pressing part, it can achieve the actions of continuous feeding, pressing and pushing out the formed fuel blocks, and this action cooperates with the rotation of the pressing die plate to achieve cyclic continuous operation; as a whole, the device has high continuous operation efficiency and strong reliability, and can achieve the action of pressing the dense mixed fuel blocks after the biomass raw materials and coal powder are mixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0034] Figure 1 This is one of the overall structural schematic diagrams of the present invention;

[0035] Figure 2This is the second schematic diagram of the overall structure of the present invention;

[0036] Figure 3 It is a schematic diagram of the crushed material conveying part of the present invention;

[0037] Figure 4 It is a cutaway view of the crushed material conveying portion of the present invention;

[0038] Figure 5 This is one of the schematic diagrams for installing the shaping briquetting part and the second conveyor belt of the present invention;

[0039] Figure 6 This is the second schematic diagram of the installation of the shaping block part and the second conveyor belt of the present invention;

[0040] Figure 7 It is a schematic diagram of the mixing assembly of the present invention;

[0041] Figure 8 It is one of the partial diagrams of the shaping briquette of the present invention;

[0042] Fig. 9 This is the second diagram of the partial solution of the shaping block of the present invention;

[0043] Fig.10 It is a cutaway view of the material guide assembly of the present invention;

[0044] Fig.11 It is a schematic diagram of the molding component of the present invention.

[0045] The meaning of each number in the figure is:

[0046] 1. Coal powder crushing bin; 101. Material guide port; 2. Biomass silo; 3. Mounting frame; 301. Material collection port; 4. Crushing knife roller; 5. Feeding crawler; 6. First conveyor belt;

[0047] 7. Mixing assembly; 71. Feed pipe; 72. First material receiving port; 73. Auger; 74. Discharging port;

[0048] 8. Shaping block part; 81. Mounting seat; 8101. Positioning lug; 8102. Side vertical plate; 8103. Lifting slot; 8104. Top plate; 82. Material guide assembly; 821. Material receiving tank; 8211. Second material receiving port; 8212. Discharge port; 822. Tank cover; 823. Middle shaft; 824. Scraper plate; 825. Support plate; 83. Horizontal plate; 831. Prism; 84. Insert rod; 841. Press plate; 842, through-hole vertical rod; 85, transmission connecting plate; 86, first gear; 87, second gear; 88, shaft rod; 89, molding assembly; 891, support rod; 892, tray; 8921, waste outlet; 8922, open mouth; 893, die plate; 8931, molding cavity; 894, jack plate; 810, driving motor; 811, first bevel gear; 812, second bevel gear; 813, stepping motor;

[0049] 9. Second conveyor belt. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0051] See also Figure 1-11 The present invention describes the above technical solution in detail through the following embodiments:

[0052] In the fuel processing device of the thermal power plant of this embodiment, the biomass fuel is dry and soft raw materials such as straw, hay and leaves, and the raw coal entering the coal powder crushing bin 1 is coal powder. The purpose of using the coal powder crushing bin 1 is to avoid mixing with large-particle coal blocks and causing blockage problems in the subsequent briquetting process.

[0053] Specifically, there are Figure 1-Figure 4 The crushing conveying part shown in the figure, in order to achieve the mixing of biomass fuel and coal powder synchronously, a feeding crawler 5 for conveying the biomass material to be crushed is installed on the mounting frame 3, and a biomass silo 2 is installed at the input end of the feeding crawler 5 of the mounting frame 3; the coal powder crushing bin 1 and the crushing knife roller 4 are respectively installed on the mounting frame 3, as shown in FIG. Figure 4 Position relationship: A crushing roller is installed inside the coal powder crushing bin 1 and is rotated by a motor. A material guide port 101 is provided at the bottom. It can be found that the baffle structure at the material guide port 101 can prevent the coal powder from affecting the crushing knife roller 4. A first conveyor belt 6 is installed below the crushing knife roller 4 and the material guide port 101 to guide the biomass crushed materials and coal powder out through the collection port 301.

[0054] The biomass crushed material and the coal powder fall onto the first conveyor belt 6 synchronously to achieve preliminary mixing, and finally are discharged into the mixing component 7. Figure 7 As shown in the structure, the mixing component 7 includes a feed pipe 71 with an auger 73 installed inside, and a first feed receiving port 72 is provided on the feed pipe 71. The biomass crushed materials and coal powder will be squeezed out from the discharge port 74. This process can extrude and mix the biomass and coal powder to improve the density, especially compress the volume of the biomass raw materials to achieve co-mixing. In order to improve the bonding effect of the subsequent briquetting, water or adhesive can be sprayed to the first feed receiving port 72. This part belongs to the existing technical application of biomass fuel blocks. The adhesive includes but is not limited to starch water, carboxymethyl cellulose solution, etc.

[0055] The above process can obtain a mixture of biomass fuel blocks, which need to be pressed and formed to obtain a uniform combustion block, such as Figure 1 , Figure 2 , Figure 5 and Figure 6 In the structure shown, a shaping and pressing block part 8 is installed at the discharge end of the mixing component 7; specifically, it includes a material guiding component 82 for containing the mixed material, and a molding component 89 for obtaining a shaped fuel block.

[0056] like Figure 8-Figure 11 As shown in the structure, the material guide assembly 82 in this embodiment includes a material receiving tank 821 with a second material receiving port 8211 and a material discharge port 8212 respectively provided on the side wall and the bottom surface, and a tank cover 822 is detachably installed on the material receiving tank 821; a central shaft 823 is rotatably installed at the axis of the material receiving tank 821 through a driving motor 810, and a scraper plate 824 is installed on the central shaft 823. It should be noted that the scraper plate 824 in this embodiment is as shown in FIG. Fig.10 In the structure shown, the scraper plate 824 is in a horizontally downwardly pressed inclined structure, which enables the scraper plate 824 to maintain the force of pressing the mixed fuel downward during the rotation process, thereby improving the efficiency of the mixed fuel being pressed into the discharge port 8212.

[0057] Molding component 89 such as Figure 8 and Fig. 9 As shown in the positional relationship, the two fit together, and the molding component 89 includes a tray 892 fixedly mounted on the mounting base 81 through a support rod 891, a support plate 825 is installed on the bottom outer wall of the receiving tank 821, a stepper motor 813 is installed on the support plate 825, and the stepper motor 813 is coaxially connected to the die plate 893 to realize the stepping rotation action of the die plate 893.

[0058] In this embodiment, three groups of uniformly distributed molding cavities 8931 are provided on the die plate 893, and each group has only one molding cavity 8931. In other embodiments, the shape and specification of the molding cavity 8931 can be set according to requirements. In this embodiment, the molding cavity 8931 adopts a columnar structure; when the molding cavity 8931 corresponds to the position of the discharge port 8212, the mixed fuel can be squeezed in. After the die plate 893 rotates and deflects 120°, the positions of the three molding cavities 8931 rotate; Fig.11 As shown, during the rotation process, it is necessary to ensure that the coal blocks are supported and compacted and finally pushed out, so the tray 892 is provided with an opening 8922 which is offset from the discharge port 8212 and is used to extrude the fuel blocks into the molding cavity 8931. During the compaction process, the tray 892 remains in position and is under pressure to form the fuel blocks.

[0059] In this embodiment, the mounting seat 81 is provided with Figure 8 , Fig. 9The top plate 8104 shown is used to fix the material guide assembly 82, and the tray 892 is fixedly installed in the mounting seat 81 through the support rod 891; the side vertical plate 8102 is installed on the mounting seat 81, and the side vertical plate 8102 is provided with a lifting groove 8103, and a horizontal plate 83 is slidably installed in the lifting groove 8103, and prisms 831 are provided at both ends of the horizontal plate 83 for preventing deflection; an insertion rod 84 corresponding to the position of the molding cavity 8931 is installed below the horizontal plate 83, and a pressure plate 841 for pressing the fuel block is installed at the bottom of the insertion rod 84.

[0060] Specifically, between the material guide component 82 and the molding component 89, there is a Figure 8 , Fig. 9 The block transmission assembly shown in the figure, wherein a first bevel gear 811 is installed at the bottom end of the middle shaft 823, a shaft rod 88 is rotatably installed in the mounting seat 81, a second bevel gear 812 meshing with the first bevel gear 811 is fixedly installed on the shaft rod 88, and a second gear 87 is fixedly installed at both ends of the shaft rod 88; in this embodiment, the shaft rod is rotatably installed on the mounting seat 81 through the limiting lug 8101, and a first gear 86 is installed on the shaft rod to mesh with the second gear 87; and as shown in FIG. Fig. 9 As shown, a latch is eccentrically installed on the first gear 86, and a transmission connecting plate 85 is rotatably installed between the latch and the prism 831, that is, the rotation of the first gear 86 will drive the horizontal plate 83 to be raised and lowered, and this process realizes the synchronous action of the material guide component 82 to feed, press and push out the molded fuel block, and this action cooperates with the rotation of the die plate 893 to realize continuous operation.

[0061] The present embodiment considers that holes can be punched on the fuel blocks to improve the combustion utilization rate of the dense fuel blocks and avoid incomplete combustion in the center of the dense fuel blocks. Therefore, a waste discharge port 8921 is provided on the tray 892, which is offset from the discharge port 8212 and is located at the rotating front end of the opening 8922. A socket plate 894 is installed at the waste discharge port 8921, and a through-hole vertical rod 842 is provided on the bottom surface of the corresponding insertion rod 84, so that holes can be punched during the pressing process to form a structure similar to honeycomb coal. The present embodiment installs a second conveyor belt 9 at the opening 8922 for pushing out the molded fuel blocks to output the molded fuel blocks. The device has high continuous operation efficiency and strong reliability, and can realize the action of pressing the mixed fuel blocks after the biomass raw materials and coal powder are mixed.

[0062] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0063] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A fuel processing device for a thermal power plant, characterized in that: include: The crushing material conveying section comprises a coal powder crushing bin (1) and a crushing knife roller (4) mounted on a mounting frame (3), and a first conveying belt (6) for conveying crushed coal and biomass; A mixing assembly (7), installed at the discharge end of the first conveyor belt (6), for receiving and mixing crushed coal and biomass; The shaping block pressing part (8) comprises a material guiding component (82) installed at the material discharging end of the mixing component (7), and a shaping component (89) for obtaining a shaped fuel block, and a block making transmission component is provided between the material guiding component (82) and the shaping component (89).

2. The fuel processing device for a thermal power plant according to claim 1, characterized in that: The material guiding assembly (82) comprises a material receiving tank (821) having a second material receiving port (8211) and a material discharging port (8212) respectively disposed on the side wall and the bottom surface, and a tank cover (822) is detachably mounted on the material receiving tank (821); A central shaft (823) is rotatably mounted at the axis of the receiving tank (821) via a driving motor (810), and a scraper plate (824) is mounted on the central shaft (823).

3. The fuel processing device for a thermal power plant according to claim 2, characterized in that: The molding assembly (89) comprises a tray (892) fixedly mounted via a support rod (891), and a die plate (893) rotatably mounted above the tray (892) and horizontally attached to the bottom surface of the receiving tank (821); A support plate (825) is installed on the outer wall of the bottom of the receiving tank (821), and a stepping motor (813) for coaxially connecting to the die plate (893) is installed on the support plate (825).

4. The fuel processing device for a thermal power plant according to claim 3, characterized in that: The die plate (893) is provided with at least two groups of evenly distributed molding cavities (8931), and the molding cavities (8931) are used to receive the mixed fuel corresponding to the positions of the discharge ports (8212); The tray (892) is provided with an opening (8922) which is offset from the discharge port (8212) and is used to extrude the molded fuel blocks in the molding cavity (8931).

5. The fuel processing device for a thermal power plant according to claim 4, characterized in that: The shaping pressing block portion (8) comprises a mounting seat (81) provided with a top plate (8104), the material guiding assembly (82) is fixedly mounted on the top plate (8104), and the shaping assembly (89) is mounted in the mounting seat (81) via the support rod (891); A side vertical plate (8102) is installed on the mounting seat (81), a lifting groove (8103) is provided on the side vertical plate (8102), a horizontal plate (83) is slidably installed in the lifting groove (8103), and prisms (831) for preventing deflection are provided at both ends of the horizontal plate (83).

6. The fuel processing device for a thermal power plant according to claim 5, characterized in that: An insertion rod (84) corresponding to the position of the molding cavity (8931) is installed below the horizontal plate (83), and a pressure plate (841) for pressing the fuel block is installed at the bottom end of the insertion rod (84).

7. The fuel processing device for a thermal power plant according to claim 6, characterized in that: The block-making transmission assembly comprises a first bevel gear (811) mounted on the bottom end of the middle shaft (823), and a shaft (88) with a second gear (87) mounted coaxially at both ends, and a second bevel gear (812) mounted on the shaft (88); The first bevel gear (811) is meshed with the second bevel gear (812) and installed, and the shaft (88) is rotatably installed on the mounting seat (81); The second gear (87) is meshed with a first gear (86), a latch is eccentrically mounted on the first gear (86), and a transmission connecting plate (85) is rotatably mounted between the latch and the prism (831).

8. The fuel processing device for a thermal power plant according to claim 6, characterized in that: The tray (892) is provided with a waste discharge port (8921) which is offset from the material discharge port (8212) and is located at the rotation front end of the open port (8922), and a socket plate (894) is installed at the waste discharge port (8921); A through-hole vertical rod (842) is provided on the bottom surface of the pressure plate (841) corresponding to the socket plate (894).

9. The fuel processing device for a thermal power plant according to claim 1, characterized in that: A feeding crawler (5) for conveying biomass to be crushed is installed on the mounting frame (3), and a biomass silo (2) is installed on the mounting frame (3) at the input end of the feeding crawler (5); The crushing knife roller (4) is rotatably mounted on the discharge end of the feeding crawler (5); The coal powder crushing bin (1) is provided with a crushing roller inside and a material guide port (101) at the bottom; The input end of the first conveyor belt (6) is arranged below the crushing knife roller (4) and the material guide port (101).

10. The fuel processing device for a thermal power plant according to claim 1, characterized in that: The mounting frame (3) is provided with a material collection port (301) at the discharge end of the first conveyor belt (6); The mixing assembly (7) comprises a feed pipe (71) having an auger (73) rotatably mounted therein, the feed pipe (71) being provided with a first material receiving port (72) for mounting at the material collecting port (301), and a discharge port (74) being mounted at the discharge end of the feed pipe (71).

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