Coal blending device for coal-fired power plant

Abstract

The utility model relates to the technical field of coal blending of coal-fired power plants, and discloses a coal-fired power plant coal blending device which comprises a double-cavity coal bunker and a guide channel arranged at the lower end of the double-cavity coal bunker, a coal blending assembly is arranged at the lower end of the guide channel, a material conveying assembly is arranged at the lower end of the coal blending assembly, and a coal grinding assembly is arranged at the lower end of the material conveying assembly. An adjusting assembly is arranged in an inner cavity of the lower end of the conveying assembly, and when proportioned coal is discharged through the conveying assembly, an operator can rotate a round rod to drive a T-shaped plugging rod and a disc to perform angle rotation according to the use condition of a coal grinding assembly connected with the lower end of the conveying assembly, so that the disc rotates in an inner cavity of a discharging barrel, and the coal grinding assembly is driven to rotate; by changing different angles of the disc in the inner cavity of the discharging barrel, the discharging speed of coal in the inner cavity of the discharging barrel is controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of coal blending in coal-fired power plants, and specifically relates to a coal blending device for coal-fired power plants. Background Technique

[0002] A coal-fired power plant is a power plant that uses coal as the main fuel, generates heat energy by burning coal, and then converts the heat energy into electrical energy. Coal power plants usually use coal blending devices to manage and control the mixing ratio of coal to meet the requirements of calorific value, ash content, sulfur content, moisture content, etc. during the combustion process, ensuring the stable operation of coal-fired boilers and meeting emission standards.

[0003] For example, a flexible coal blending device for coal-fired power plants with the application number CN202321575528.2 has a raw coal bunker divided into at least two coal bins for storing different coal types. A coal blending component for controlling the coal output flow is installed at the bottom discharge port of each coal bin. The coal output by all coal blending components is transported, blended, and transmitted to the coal mill system through a common feeding channel; each coal blending component is provided with a circulating and rotating conveying chamber for piling up the coal falling from the corresponding coal bin. Combining the volume of the conveying chamber, the output flow of coal in the corresponding coal bin is controlled by controlling the rotation speed of each coal blending component. The coal blending device provided by the utility model divides the raw coal bunker into coal bins for storing different coal types and configures independently controlled coal blending components at the discharge ports. Through the precise control of the output flow of different coal types in the corresponding coal bins by each coal blending component, any proportion mixing of different coal types is realized, solving the problem that the current co-firing technology cannot arbitrarily adjust the blending ratio of each coal type.

[0004] In the above patent, it is proposed that after different-quality coals are blended through the coal bunker ratio and finally enter the coal mill system through the feeding channel for grinding and processing. Since there is no quantity control mechanism in the feeding channel after the blended coal is discharged through the feeding channel, when too much coal enters the coal mill system for processing, it affects the processing quality of the coal mill system.

[0005] Therefore, we propose a coal blending device for coal-fired power plants to facilitate solving the above-mentioned problems. Content of the Utility Model

[0006] The purpose of the utility model is to provide a coal blending device for coal-fired power plants to solve the problem proposed in the above background technique that since there is no quantity control mechanism in the feeding channel after the blended coal is discharged through the feeding channel, when too much coal enters the coal mill system for processing, it affects the processing quality of the coal mill system.

[0007] To achieve the above object, the present utility model provides the following technical solution: A coal blending device for a coal-fired power plant, comprising a double-chamber coal bunker and a guiding channel arranged at the lower end of the double-chamber coal bunker. A coal blending component is arranged at the lower end of the guiding channel, a feeding component is arranged at the lower end of the coal blending component, a coal grinding component is arranged at the lower end of the feeding component, and an adjusting component is arranged in the inner cavity at the lower end of the feeding component. The adjusting component is adapted to control the feeding speed of the feeding component;

[0008] The adjusting component includes a rotating mechanism and a fixing mechanism fixedly installed in the middle of one end of the rotating mechanism. A limiting mechanism is movably installed in the inner cavity of the fixing mechanism. A supporting mechanism is threadedly connected to the lower end of the limiting mechanism. The setting angle of the fixing mechanism is fixed by the setting of the limiting mechanism, and the fixing mechanism is adapted to drive the rotating mechanism to adjust the setting angle.

[0009] Preferably, the feeding component includes a feeding cylinder and an extending cylinder fixedly installed on one side of the lower end of the outer wall of the feeding cylinder. An inner groove is formed in the middle of the inner wall of the extending cylinder.

[0010] Preferably, the rotating mechanism includes a disc and a T-shaped plugging rod fixedly installed at one end of the outer wall of the disc. An embedded ring is fixedly installed in the middle of the outer wall of the T-shaped plugging rod.

[0011] Preferably, the fixing mechanism includes a round rod and rotating rods fixedly installed on both sides of one end of the round rod. A spherical ball is fixedly installed at one end of the round rod, and through grooves are formed around the outer surface of the spherical ball.

[0012] Preferably, the limiting mechanism includes an arc-shaped guide rod and a long groove formed on one side of the upper end of the outer wall of the arc-shaped guide rod.

[0013] Preferably, the supporting mechanism includes an embedded rod and a threaded rod fixedly installed on one side of the lower end of the outer wall of the embedded rod.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. When the proportioned coal is fed through the feeding component, the round rod is rotated to drive the T-shaped plugging rod and the disc to rotate at an angle, so that the disc rotates in the inner cavity of the feeding cylinder. By changing the different angles of the disc in the inner cavity of the feeding cylinder, the feeding speed of the coal in the inner cavity of the feeding cylinder is controlled.

[0016] 2. When fixing the setting angle of the disc, the embedded rod is lifted, so that the embedded rod is inserted into the inner cavity of the through groove formed on the outer surface of the spherical ball. By fixing the angle of the spherical ball, the setting angles of the round rod, the T-shaped plugging rod and the disc are fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic three-dimensional structure diagram of the whole of the present utility model;

[0018] Figure 2 Schematic three-dimensional structure diagram of the adjustment component of the present utility model;

[0019] Figure 3 Schematic three-dimensional structure diagram of the limiting mechanism and the supporting mechanism of the present utility model;

[0020] Figure 4 Schematic three-dimensional structure diagram of the rotating mechanism and the fixing mechanism of the present utility model.

[0021] In the figure: 1, double-chamber coal bunker; 2, guiding channel; 3, coal distribution component; 4, material conveying component; 41, blanking cylinder; 42, extending cylinder; 43, inner groove; 5, coal grinding component; 6, adjustment component; 61, rotating mechanism; 611, disc; 612, T-shaped plugging rod; 613, embedded ring; 62, fixing mechanism; 621, round rod; 622, rotating rod; 623, spherical ball; 624, through circular groove; 63, limiting mechanism; 631, arc-shaped guide rod; 632, long groove; 64, supporting mechanism; 641, embedded rod; 642, threaded rod. Specific embodiments

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Embodiment 1: Please refer to Figures 1-4 , a coal distribution device for a coal-fired power plant, including a double-chamber coal bunker 1 and a guiding channel 2 provided at the lower end of the double-chamber coal bunker 1. A coal distribution component 3 is provided at the lower end of the guiding channel 2. A material conveying component 4 is provided at the lower end of the coal distribution component 3. A coal grinding component 5 is provided at the lower end of the material conveying component 4. An adjustment component 6 is provided in the lower inner cavity of the material conveying component 4, and the adjustment component 6 is adapted to control the blanking speed of the material conveying component 4.

[0024] The adjustment component 6 includes a rotating mechanism 61 and a fixing mechanism 62 fixedly installed in the middle of one end of the rotating mechanism 61. A limiting mechanism 63 is movably installed in the inner cavity of the fixing mechanism 62. The lower end of the limiting mechanism 63 is threadedly connected to a supporting mechanism 64. By providing the limiting mechanism 63, the setting angle of the fixing mechanism 62 is adapted to be fixed, and the fixing mechanism 62 is adapted to drive the rotating mechanism 61 to adjust the setting angle.

[0025] The material feeding assembly 4 includes a blanking cylinder 41 and an extension cylinder 42 fixedly installed on one side of the lower end of the outer wall of the blanking cylinder 41. An inner groove 43 is provided in the middle of the inner wall of the extension cylinder 42.

[0026] The rotating mechanism 61 includes a disc 611 and a T-shaped plugging rod 612 fixedly installed at one end of the outer wall of the disc 611. An embedded ring 613 is fixedly installed in the middle of the outer wall of the T-shaped plugging rod 612.

[0027] The disc 611 is movably installed in the inner cavity of the blanking cylinder 41, the T-shaped plugging rod 612 is movably installed at one end of the notch of the extension cylinder 42, and the embedded ring 613 is movably installed in the inner cavity of the inner groove 43.

[0028] The fixing mechanism 62 includes a round rod 621 and rotating rods 622 fixedly installed on both sides of one end of the round rod 621. A spherical ball 623 is fixedly installed at one end of the round rod 621. A through groove 624 is provided around the outer surface of the spherical ball 623. The embedding rod 641 is movably installed in the inner cavity of the through groove 624 to fix the position of the spherical ball 623 after rotating by an angle.

[0029] In this embodiment: When the proportioned coal is discharged through the material feeding assembly 4, the operator can rotate the round rod 621 according to the usage of the coal grinding assembly 5 connected to the lower end of the material feeding assembly 4 to drive the T-shaped plugging rod 612 and the disc 611 to rotate by an angle, so that the disc 611 rotates in the inner cavity of the blanking cylinder 41. By changing the different angles of the disc 611 in the inner cavity of the blanking cylinder 41, the control of the coal discharging speed in the inner cavity of the blanking cylinder 41 is realized.

[0030] Embodiment 2: This embodiment is an improvement made on the basis of Embodiment 1. Specifically, please refer to Figure 3 , the limiting mechanism 63 includes an arc-shaped guide rod 631 and a long groove 632 provided on one side of the upper end of the outer wall of the arc-shaped guide rod 631.

[0031] The supporting mechanism 64 includes an embedding rod 641 and a threaded rod 642 fixedly installed on one side of the lower end of the outer wall of the embedding rod 641. The embedding rod 641 is movably installed in the inner cavity of the arc-shaped guide rod 631, the threaded rod 642 is movably installed in the inner cavity of the long groove 632, and the threaded rod 642 is threadedly pressed against one side of the notch of the long groove 632 by a nut.

[0032] In this embodiment: When the operator fixes the set angle of the disc 611, the embedding rod 641 can be lifted upward so that the embedding rod 641 is inserted into the inner cavity of the through groove 624 opened on the outer surface of the spherical ball 623. By fixing the angle of the spherical ball 623, the set angles of the round rod 621, the T-shaped plugging rod 612, and the disc 611 are fixed. At the same time, the threaded rod 642 at the lower end of the embedding rod 641 is threadedly pressed against one side of the notch of the long groove 632 by a nut, and the set height of the embedding rod 641 can be fixed.

[0033] Working principle: When the proportioned coal is fed through the feeding component 4, the operator can rotate the round rod 621 to drive the T-shaped plugging rod 612 and the disc 611 to rotate at an angle according to the usage of the coal grinding component 5 connected to the lower end of the feeding component 4, so that the disc 611 rotates in the inner cavity of the feeding cylinder 41. By changing the different angles of the disc 611 in the inner cavity of the feeding cylinder 41, the control of the coal feeding speed in the inner cavity of the feeding cylinder 41 is realized. At the same time, after the operator adjusts the set angle of the disc 611, the embedding rod 641 can be lifted upward so that the embedding rod 641 is inserted into the inner cavity of the through groove 624 opened on the outer surface of the spherical ball 623. By fixing the angle of the spherical ball 623, the set angles of the round rod 621, the T-shaped plugging rod 612, and the disc 611 are fixed. At the same time, the threaded rod 642 at the lower end of the embedding rod 641 is threadedly pressed against one side of the notch of the long groove 632 by a nut, and the set height of the embedding rod 641 can be fixed.

[0034] By equally dividing the double-chamber coal bunker 1 into an inferior coal bunker and a high-quality coal bunker, different coal types are transported into different bunkers through a belt conveyor (not shown in the figure). 3D laser scanning detectors (not shown in the figure) are installed above each bunker to detect and calculate the remaining coal volume for the control system to calculate and analyze. After receiving the blending task, the control system determines the blending ratio of inferior coal and high-quality coal, and then sets the coal flow output of the coal blending component. The motors of each coal blending component output different speeds through couplings according to different flows, driving the sprocket mechanism composed of a driving sprocket, a driven sprocket, a driving shaft, a driven shaft, and a transmission chain. The sprocket mechanism installed on the mounting bracket, the driving bearing seat, and the driven bearing seat drives the conveying cabin composed of every two groups of conveyor chain plates to rotate. The leakage of coal is protected by a leakage-proof baffle, and a constant coal flow is stably output to the downstream coal mill system, making the blending ratio accurate. The structures and working principles of the above double-chamber coal bunker, coal blending component, and downstream coal mill system are the same as those completed by the rare earth motor, coupling, conveying cabin, transmission chain, driving sprocket, driving bearing seat, mounting bracket, driven bearing seat, driven sprocket, conveyor chain plate, driving shaft, driven shaft, and leakage-proof baffle in the patent with the publication number CN202123386504.6. This is the prior art and will not be elaborated here.

[0035] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0036] 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 perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A coal blending device for a coal-fired power plant, comprising a double-chamber coal bunker (1) and a guide channel (2) arranged at the lower end of the double-chamber coal bunker (1), wherein a coal blending assembly (3) is arranged at the lower end of the guide channel (2), characterized in that: The lower end of the coal blending assembly (3) is provided with a material conveying assembly (4), the lower end of the material conveying assembly (4) is provided with a coal grinding assembly (5), and an adjustment assembly (6) is provided in the inner cavity at the lower end of the material conveying assembly (4), and the adjustment assembly (6) is suitable for controlling the material discharge speed of the material conveying assembly (4); The adjustment assembly (6) comprises a rotating mechanism (61) and a fixing mechanism (62) fixedly mounted at the middle of one end of the rotating mechanism (61); a limiting mechanism (63) is movably mounted in the inner cavity of the fixing mechanism (62); a support mechanism (64) is threadedly connected to the lower end of the limiting mechanism (63); the limiting mechanism (63) is arranged to fix the setting angle of the fixing mechanism (62); and the fixing mechanism (62) is arranged to drive the rotating mechanism (61) to adjust the setting angle.

2. A coal blending device for a coal-fired power plant according to claim 1, characterized in that: The material conveying assembly (4) comprises a lower material barrel (41) and an extension cylinder (42) fixedly mounted on one side of the lower end of the outer wall of the lower material barrel (41), and an inner groove (43) is provided in the middle of the inner wall of the extension cylinder (42).

3. A coal blending device for a coal-fired power plant according to claim 1, characterized in that: The rotating mechanism (61) comprises a circular disc (611) and a T-shaped blocking rod (612) fixedly mounted on one end of the outer wall of the circular disc (611); an embedded circular ring (613) is fixedly mounted on the middle portion of the outer wall of the T-shaped blocking rod (612).

4. A coal blending device for a coal-fired power plant according to claim 1, characterized in that: The fixing mechanism (62) comprises a round rod (621) and rotating rods (622) fixedly mounted on both sides of one end of the round rod (621); a round ball (623) is fixedly mounted on one end of the round rod (621); and a through circular groove (624) is formed around the outer surface of the round ball (623).

5. The coal blending device for a coal-fired power plant according to claim 1, characterized in that: The limiting mechanism (63) comprises an arc-shaped guide rod (631) and a long groove (632) formed on one side of the upper end of the outer wall of the arc-shaped guide rod (631).

6. The coal blending device for a coal-fired power plant according to claim 1, characterized in that: The support mechanism (64) comprises an embedded rod (641) and a threaded rod (642) fixedly mounted on one side of the lower end of the outer wall of the embedded rod (641).

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