Coal feeding device for boiler of thermal power plant

Abstract

The utility model discloses a thermal power plant boiler coal feeding device which comprises a coal feeding bin, a feeding port of the coal feeding bin is connected with a hopper, a discharging port of the coal feeding bin is connected with a coal discharging pipeline connected with a boiler, a feeding conveying belt is arranged in the coal feeding bin, and a material stirring plate pushed by a pushing mechanism is arranged in the coal discharging pipeline. By the adoption of the coal feeding device, on one hand, the probability that the coal discharging pipeline is blocked is reduced, and on-line dredging can be conducted quickly and conveniently when the coal discharging pipeline is blocked; therefore, the combustion stability of the boiler is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal power generation, and in particular relates to a coal feeding device for a boiler in a thermal power plant. Background Art

[0002] The current method of feeding coal to the boilers of thermal power plants is generally to connect the hopper and the coal inlet of the boiler through a coal pipe. When the weather is humid or there is a lot of rain, the moisture content of the coal is high, and the coal entering the coal pipe is easy to stick to the wall, causing the coal inlet to be blocked or the coal bridge to form a coal bridging and thus cut off the coal supply, affecting the stability of boiler combustion. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a coal feeding device for a thermal power plant boiler so as to improve the stability of boiler combustion.

[0004] The utility model solves the above problems through the following technical means:

[0005] A coal feeding device for a boiler in a thermal power plant comprises a coal feeding bunker, the feed port of the coal feeding bunker is connected to a hopper, the discharge port of the coal feeding bunker is connected to a coal discharge pipe connected to the boiler, a feeding conveyor belt is provided in the coal feeding bunker, and a material shifting plate pushed by a pushing mechanism is provided in the coal discharge pipe.

[0006] Furthermore, the coal lowering pipeline is provided with a coal blocking sensor and also includes a controller, and the controller is electrically connected to the coal blocking sensor and the pushing mechanism respectively.

[0007] Furthermore, the pushing mechanism is an electric push rod.

[0008] Furthermore, a scraper conveyor belt is provided below the feeding conveyor belt.

[0009] Furthermore, the discharge end of the feeding conveyor belt is located above the discharge port of the coal bunker.

[0010] Furthermore, the feeding conveyor belt is electrically connected to the controller.

[0011] Beneficial effects of the utility model:

[0012] This application provides a coal feeding device for a thermal power plant boiler, comprising a coal bunker, a hopper connected to the bunker's feed port, a coal discharge port connected to a coal discharge pipe connected to the boiler, a feeding conveyor belt disposed within the bunker, and a feed plate driven by a driving mechanism disposed within the coal discharge pipe. The coal feeding device of this application reduces the probability of blockage in the coal discharge pipe and, when blocked, allows for quick and convenient online unblocking. Consequently, boiler combustion stability is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 It is a schematic diagram of a preferred embodiment of the present utility model. DETAILED DESCRIPTION

[0015] The present invention will be described in detail below with reference to the accompanying drawings. Figure 1 The utility model shows a coal feeding device for a thermal power plant boiler, comprising a coal bunker 1, the feed port of which is connected to a hopper 2, and the discharge port of which is connected to a coal discharge pipe 5 connected to the boiler. A feed conveyor belt 3 is provided within the bunker, with the discharge end of the feed conveyor belt located above the discharge port. A paddle plate 9, driven by a driving mechanism 7, is provided within the coal discharge pipe. A coal blockage sensor 6 is mounted on the coal discharge pipe, and a controller 8 is also included, which is electrically connected to the coal blockage sensor and the driving mechanism. The driving mechanism is an electric push rod.

[0016] During coal feeding, raw coal falls from the hopper onto the feed conveyor belt. After being transported by the feed conveyor belt, it falls into the coal discharge pipe and then flows into the boiler through the coal discharge pipe. On the one hand, the feed conveyor belt can control the coal delivery rate, which helps reduce the probability of blockage in the coal discharge pipe. On the other hand, when the coal blockage sensor detects a blockage in the coal discharge pipe, it feeds a signal back to the controller, which controls the action of the pushing mechanism, which pushes the material diverter plate to move, loosening the blocked material and unblocking the discharge pipe, achieving fast and convenient online unblocking; thus, effectively improving the stability of boiler combustion. Preferably, the feed conveyor belt is electrically connected to the controller, and when a blockage occurs, the controller can synchronously control the feed conveyor belt to stop feeding.

[0017] As a further improvement to the above technical solution, a scraper conveyor belt 4 is provided below the feeding conveyor belt, and a scraper is provided on the scraper conveyor belt. When part of the raw coal is scattered in the coal bunker, the scraper can be used to scrape the scattered raw coal to the coal discharge pipe.

[0018] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A coal feeding device for a thermal power plant boiler, characterized by: It includes a coal feeding bunker, the feed port of the coal feeding bunker is connected to a hopper, the discharge port of the coal feeding bunker is connected to a coal discharge pipe connected to the boiler, a feeding conveyor belt is provided in the coal feeding bunker, and a material shifting plate pushed by a pushing mechanism is provided in the coal discharge pipe.

2. The coal feeding device for a thermal power plant boiler according to claim 1, characterized in that: The coal lowering pipeline is provided with a coal blocking sensor and also includes a controller, which is electrically connected to the coal blocking sensor and the pushing mechanism respectively.

3. The coal feeding device for a thermal power plant boiler according to claim 2, characterized in that: The pushing mechanism is an electric push rod.

4. The coal feeding device for a thermal power plant boiler according to claim 3, characterized in that: A scraper conveyor belt is provided below the feeding conveyor belt.

5. The coal feeding device for a thermal power plant boiler according to claim 4, characterized in that: The discharge end of the feeding conveyor belt is located above the discharge port of the coal bunker.

6. The coal feeding device for a thermal power plant boiler according to claim 5, characterized in that: The feeding conveyor belt is electrically connected to the controller.

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