Power plant coal feeding system capable of adding additive on line

Abstract

The utility model relates to a power plant coal feeding system capable of adding an additive on line. The power plant coal feeding system comprises a first conveying mechanism, a spiral conveying mechanism, a mixing mechanism and a second conveying mechanism, the spiral conveying mechanism comprises a conveying shell, a first spiral conveying roller and a first motor; a first feeding hole is formed in the upper surface of one end of the conveying shell; a first discharging opening is formed in the lower surface of the other end of the conveying shell; the first spiral conveying roller is horizontally and rotationally arranged in the conveying shell; the material mixing mechanism comprises a material mixing shell, a plurality of spraying heads, a second spiral conveying roller and a second motor; a second feeding hole is formed in the upper surface of one end of the mixing shell and is connected to the first discharging hole; a second discharge hole is formed in the lower surface of the other end of the mixing shell; the spraying head is arranged on the inner wall of the mixing shell and is close to the second feeding hole. The coal additive spraying device can spray an additive to coal on line and effectively ensure that the additive is fully mixed with the conveyed coal.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical manufacturing technical field, especially an online adding additive's coal feed system of power plant. BACKGROUND

[0002] The main functions of using coal additive in power plant include improving combustion efficiency, reducing pollutant emission, saving energy and improving the physical properties of coal.

[0003] At present, the adding method of additive is usually in the action of conveying belt transporting coal, spraying additive on the coal on the conveying belt online, and the additive is easy to fall off from both sides of the conveying belt, causing waste; in addition, the full mixing of coal and additive on the conveying belt cannot be guaranteed, reducing the efficacy of additive.

[0004] Therefore, it is desirable to provide an online adding additive's coal feed system of power plant, so as to solve the above technical problems. UTILITY MODEL CONTENT

[0005] The utility model aims at providing an online adding additive's coal feed system of power plant, which can spray additive on coal online and effectively ensure the full mixing of additive and coal in transmission.

[0006] To achieve the above utility model purposes, an online adding additive's coal feed system of power plant is provided, which comprises a first conveying mechanism, a spiral conveying mechanism, a mixing mechanism and a second conveying mechanism.

[0007] The first conveying mechanism comprises a first support and a first conveying belt.

[0008] The first conveying belt is arranged on the first support to convey coal.

[0009] The spiral conveying mechanism comprises a conveying housing, a first spiral conveying roller and a first motor.

[0010] One end of the conveying housing is provided with a first feeding port on the upper surface, and the first feeding port is located directly below the discharging end of the first conveying belt.

[0011] The other end of the conveying housing is provided with a first discharging port on the lower surface.

[0012] The first spiral conveying roller is horizontally arranged in the conveying housing.

[0013] The first motor is used to drive the first spiral conveying roller to rotate.

[0014] The mixing mechanism comprises a mixing housing, a plurality of spray heads, a second spiral conveying roller and a second motor.

[0015] The upper surface of one end of the mixing shell is provided with a second inlet, which is connected to the first outlet.

[0016] A second discharge port is provided on the lower surface of the other end of the mixing shell;

[0017] Several of the spray heads are disposed on the inner wall of the mixing shell and near the second feed inlet;

[0018] The second motor is used to drive the second spiral conveyor roller to rotate;

[0019] The second conveying mechanism includes a second support and a second conveyor belt. The second conveyor belt is mounted on the second support, and the feed end of the second conveyor belt is located directly below the second discharge port.

[0020] Preferably, a channel pipe is vertically provided between the discharge end of the first conveyor belt and the first inlet.

[0021] Furthermore, the channel tube is equipped with a multi-axis roller screen;

[0022] The channel pipe is located on both sides of the multi-axis roller screen and is equipped with inclined pipes.

[0023] Preferably, a valve is provided between the second inlet and the first outlet, and a weight sensor is provided on the conveying housing.

[0024] This utility model discloses an online additive-adding coal feeding system for power plants, which has the following advantages compared with the prior art:

[0025] (1) The additives are sprayed onto the coal online and thoroughly mixed during the conveying process, which effectively improves the utilization rate of the additives and the conveying efficiency.

[0026] (2) The design is simple and easy to use. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the internal structure of a power plant coal feeding system for online additive addition according to this embodiment;

[0028] Figure 2 This is a schematic diagram of the interior of the channel tube in this embodiment. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] Example

[0031] like Figure 1 As shown, a power plant coal feeding system for online additive addition includes a first conveying mechanism, a screw conveying mechanism, a mixing mechanism, and a second conveying mechanism.

[0032] The first conveying mechanism includes a first support 1 and a first conveyor belt 2; the first conveyor belt 2 is disposed on the first support 1 to transport coal.

[0033] The spiral conveying mechanism includes a conveying housing 3, a first spiral conveying roller 4, and a first motor 5; a first feed inlet 6 is provided on the upper surface of one end of the conveying housing 3, and the first feed inlet 6 is located directly below the discharge end of the first conveyor belt 2; a first discharge outlet 7 is provided on the lower surface of the other end of the conveying housing 3; the first spiral conveying roller 4 is horizontally rotatably disposed inside the conveying housing 3; the first motor 5 is used to drive the first spiral conveying roller 4 to rotate.

[0034] The coal is conveyed by the first conveying mechanism and then falls into the conveying housing 3. Under the action of the first spiral conveying roller 4, it is conveyed into the mixing mechanism.

[0035] In this embodiment, a channel pipe 8 is vertically provided between the discharge end of the first conveyor belt 2 and the first inlet, which plays a good guiding role for the coal and prevents it from falling into the conveying shell 3.

[0036] Furthermore, such as Figure 2 As shown, a multi-axis roller screen 9 is installed inside the channel pipe 8 to screen the conveyed coal. Inclined pipes 10 are installed on both sides of the multi-axis roller screen 9 in the channel pipe 8. With this configuration, after the coal is screened by the multi-axis roller screen 9, fine coal pieces fall into the conveying housing 3, while larger pieces of coal, through the action of the multi-axis roller screen 9, flow out from the inclined pipes 10 on both sides and are then fed into a crusher for crushing. The coal is then conveyed again through the first conveying mechanism, ensuring the mixing effect of the coal and additives. The inventors should note that the multi-axis roller screen is an existing device, and its specific structure can be found in Chinese Utility Model Patent Publication No. CNCN213494771U.

[0037] The mixing mechanism includes a mixing housing 11, a plurality of spray heads 12, a second spiral conveying roller 13, and a second motor 14; a second feed inlet 15 is provided on the upper surface of one end of the mixing housing 11, and the second feed inlet 15 is connected to the first discharge outlet 7; a second discharge outlet 16 is provided on the lower surface of the other end of the mixing housing 11; a plurality of spray heads 12 are disposed on the inner wall of the mixing housing 11 and are close to the second feed inlet 15; the second motor 14 is used to drive the second spiral conveying roller 13 to rotate.

[0038] Coal is conveyed into the mixing shell 11 of the mixing mechanism by the screw conveyor. The spray head 12 sprays the additives, and then, under the action of the second screw conveyor roller 13, it is conveyed forward while being stirred and mixed.

[0039] In the embodiment, the second feeding port 15 is provided with a valve 17 between the first discharging port 7, and the conveying shell 3 is provided with a weight sensor 18; in this way, the coal can be quantitatively mixed, and the mixing effect of the coal and the additive is further improved.

[0040] The second conveying mechanism comprises a second support 19 and a second conveying belt 20, the second conveying belt 20 is arranged on the second support 19, and the feeding end of the second conveying belt 20 is located directly below the second discharging port 16.

[0041] The mixture of the coal and the additive after the mixing treatment falls on the second conveying belt 20 and is conveyed to a designated position.

[0042] The preferred embodiments of the utility model have been specifically described above, but the utility model is not limited to the described embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the range defined by the claims of the present application.

Claims

1. A power plant coal feeding system for online additive addition, characterized in that, It includes a first conveying mechanism, a screw conveying mechanism, a mixing mechanism, and a second conveying mechanism; The first conveying mechanism includes a first support frame and a first conveyor belt; The first conveyor belt is mounted on the first support to transport coal; The spiral conveying mechanism includes a conveying housing, a first spiral conveying roller, and a first motor; The upper surface of one end of the conveying housing is provided with a first feed inlet, which is located directly below the discharge end of the first conveyor belt; The lower surface of the other end of the conveying housing is provided with a first discharge port; The first spiral conveying roller is horizontally rotatable inside the conveying housing; The first motor is used to drive the first spiral conveyor roller to rotate; The mixing mechanism includes a mixing shell, several spray heads, a second spiral conveyor roller, and a second motor. The upper surface of one end of the mixing shell is provided with a second inlet, which is connected to the first outlet. A second discharge port is provided on the lower surface of the other end of the mixing shell; Several of the spray heads are disposed on the inner wall of the mixing shell and near the second feed inlet; The second motor is used to drive the second spiral conveyor roller to rotate. The second conveying mechanism includes a second support and a second conveyor belt. The second conveyor belt is mounted on the second support, and the feed end of the second conveyor belt is located directly below the second discharge port.

2. The power plant coal feeding system for online additive addition according to claim 1, characterized in that, A vertical channel pipe is provided between the discharge end of the first conveyor belt and the first inlet.

3. A power plant coal feeding system for online additive addition according to claim 2, characterized in that, The channel tube is equipped with a multi-axis roller screen; The channel pipe is provided with inclined pipes on both sides of the multi-axis roller screen.

4. A power plant coal feeding system for online additive addition according to any one of claims 1 to 3, characterized in that, A valve is provided between the second inlet and the first outlet, and a weight sensor is provided on the conveying housing.

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