Automatic feeding device of boiler

Abstract

The utility model relates to an automatic feeding device of a boiler, which comprises a coal conveying unit of the boiler, the coal conveying unit comprises a ground conveyor, a lifting conveyor and a high-level conveyor which are arranged in sequence, the high-level conveyor is provided with a material distributing device, a material outlet of the material distributing device is connected with a material receiving hopper, and the material receiving hopper is connected with the lifting conveyor. A feed opening of the material receiving hopper is connected with a feeding device through a feed pipe, the output end of the feeding device is communicated with a boiler hearth, a first valve is installed on the feed pipe, a platform of the boiler is provided with a closed enclosure for closing the material distributing device and the material receiving hopper, and a bin top dust remover is arranged on the closed enclosure. Existing equipment of a boiler is effectively utilized, the bed materials are conveyed through the coal conveying unit, the bed materials can be directly conveyed into a boiler hearth in a coal field, the bed material bagging and transferring process and the manual bed material filling process are omitted, manpower, working hours and cost are saved, and production efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to an automatic feeding device for boilers. Background Art

[0002] Before starting a circulating fluidized bed boiler, it is usually necessary to add dozens of tons of starting bed material into the furnace. The existing conventional bed material adding method requires the bed material to be bagged in the coal yard and then transported to the boiler, and then hoisted to the high furnace mouth layer by a crane, and finally delivered to the furnace by manual and mechanical means. The loading work is very time-consuming and labor-intensive.

[0003] For example, patent number CN113701146A discloses an automatic bottom material feeding system for a circulating fluidized bed boiler, including a Jiaolong conveyor and a feeding bin. The Jiaolong conveyor is tilted, the Jiaolong conveyor is connected to the bottom of the feeding bin, and the feeding bin is connected to the feeding port of the circulating fluidized bed boiler through a second feeding channel. When the Jiaolong conveyor of this patent is in use, although it can directly transport the bed material on the ground to the furnace, it still needs to be transported to the vicinity of the boiler before it can be used. And when loading the Jiaolong conveyor, a large amount of dust will be generated in the boiler area, which is not conducive to the operation of surrounding personnel.

[0004] Existing circulating fluidized bed boiler devices are all equipped with a fuel supply system, which includes a coal conveying unit and a coal barrel arranged between the coal material yard and the boiler. The conveying starting end of the coal conveying unit is located at the loading port on the ground of the coal material yard, and the conveying end of the coal conveying unit is connected to the feeding port of the coal barrel at a high place of the boiler. The coal conveying unit is used to transport the fuel coal from the ground to the coal barrel at a high place for storage. A coal feeder is provided at the coal barrel outlet, and the fuel coal is transported into the furnace for combustion through the coal feeder.

[0005] Taking into account the existing problems, if a coal conveying unit is designed that can effectively utilize the existing boiler, and the bed material can be transported directly from the coal yard to the boiler furnace through the coal conveying unit, the bed material bagging and transportation process can be eliminated, which will greatly save manpower, material resources and working hours and improve production efficiency. Utility Model Content

[0006] The utility model aims at solving the deficiencies of the prior art and provides an automatic boiler feeding device.

[0007] The utility model is realized through the following technical scheme: an automatic boiler feeding device, comprising a coal conveying unit of the boiler, wherein the coal conveying unit comprises a ground conveyor, a lifting conveyor and a high-level conveyor which are arranged in sequence, and a material dividing device is arranged on the high-level conveyor, and a material discharging port of the material discharging device is connected with a receiving hopper, and a material discharge port of the receiving hopper is connected with a feeding device through a material discharge pipe, and an output end of the feeding device is connected with a boiler furnace, and a first valve is installed on the material discharge pipe.

[0008] This solution utilizes the boiler's coal conveying unit to transport bed material from the ground of the coal material yard to the upper floors of the boiler, distributes the bed material into the receiving hopper through the distributing equipment, and the receiving hopper sends the bed material to the feeding equipment through the discharge pipe, and the bed material is transported into the furnace through the feeding equipment. This solution effectively utilizes the existing equipment of the boiler, eliminates the bed material bagging and transportation process, greatly saves manpower, material resources and working hours, and improves production efficiency.

[0009] As an optimization, the material separation equipment is a coal plow. In this optimization solution, the coal plow is arranged on the high-level conveyor, and the coal plow blocks the conveyed bed material and separates the bed material into the receiving hopper, and the use effect is stable and good.

[0010] As an optimization, the feeding equipment is a coal feeder, the lower end of the feed pipe is connected to the feed port of the coal feeder, and the discharge port of the coal feeder is connected to the furnace port of the boiler through the feed pipe. This optimization scheme further utilizes the coal feeder of the coal conveying unit, and evenly transports the bed material into the furnace through the coal feeder, further improving the utilization rate of the existing equipment of the boiler and saving costs.

[0011] As an optimization, a second valve is installed on the drop pipe. This optimization scheme controls the bed material delivery through the second valve.

[0012] As an optimization, a first valve is installed on the feed pipe. This optimization scheme controls the bed material delivery through the first valve.

[0013] As an optimization, the discharge port of the receiving hopper is connected to the upper end of the discharge pipe through a corrugated hose. This optimization scheme makes the connection between the two ends of the discharge pipe more stable by arranging a non-rigid connection of the corrugated hose.

[0014] As an optimization, a closed enclosure for enclosing the material distribution equipment and the receiving hopper is provided on the platform of the boiler, and a silo top dust collector is provided on the closed enclosure. This optimization scheme closes the material distribution equipment and the receiving hopper by means of a closed enclosure to prevent the dust generated by the material distribution from spreading outward, and collects the dust in the closed enclosure by means of the silo top dust collector, which is convenient for the surrounding personnel to work.

[0015] The beneficial effects of the utility model are as follows: the coal conveying unit of the boiler is used to convey the bed material from the ground of the coal material field to the upper layer of the boiler, and the bed material is blocked by the coal plow and divided into the receiving hopper. When dividing the material, the dust is collected by the dust collector on the top of the silo, which is convenient for personnel to work. The receiving hopper sends the bed material to the coal feeder of the coal conveying unit through the down pipe, and the bed material is conveyed into the furnace by the coal feeder. This solution effectively utilizes the existing equipment of the boiler, and can directly convey the bed material from the coal material field to the boiler furnace, eliminating the bed material bagging and transportation process and the manual bed material filling process, saving manpower hours and costs, and greatly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 for Figure 1 A magnified view of part A;

[0018] As shown in the figure:

[0019] 1. Ground conveyor, 2. Lifting conveyor, 3. High-rise conveyor, 4. Coal plow, 5. Receiving hopper, 6. Discharge pipe, 7. Coal feeder, 8. Dropping pipe, 9. Furnace, 10. Coal yard loading port, 11. Crusher, 12. Coal dropping channel, 13. Closed enclosure, 14. Silo top dust collector, 15. Corrugated hose, 16. First valve, 17. Second valve. DETAILED DESCRIPTION

[0020] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0021] like Figures 1-2 As shown, a boiler automatic feeding device includes a coal conveying unit of the boiler, and the coal conveying unit includes a ground conveyor 1, a lifting conveyor 2 and a high-level conveyor 3 which are arranged in sequence.

[0022] The coal conveyor unit belongs to the fuel supply system equipment of the existing circulating fluidized bed boiler device, which is used to transport the fuel coal from the coal material field to the furnace 9 at the top of the boiler for combustion. The ground conveyor 1 is the conveying start of the coal conveyor unit, which is usually set at the loading port 10 of the coal material field and loaded by a loader.

[0023] The fuel coal transported by the ground conveyor 1 is transported to the boiler high level through the lifting conveyor 2. In order to improve the combustion efficiency of the fuel coal, the circulating fluidized bed boiler has certain requirements on the particle size of the fuel coal, so a crusher 11 is set between the ground conveyor 1 and the lifting conveyor 2, and the output end of the ground conveyor 1 and the input end of the lifting conveyor 2 are connected to the input end and output end of the crusher 11 respectively.

[0024] A coal dropping channel 12 is provided on the platform of the boiler upper layer at the output end of the lifting conveyor 2. The input end of the high-level conveyor 3 is also arranged in the coal dropping channel 12 and is located directly below the output end of the lifting conveyor 2, so that the fuel coal transported by the lifting conveyor 2 falls onto the high-level conveyor 3.

[0025] The high-rise conveyor 3 is the conveying end of the coal conveying unit. The output end of the high-rise conveyor 3 is connected to the feed port of the coal barrel arranged at a high position of the boiler. The conveyed fuel coal is stored in the coal barrel. The coal barrel outlet is connected to the coal feeder 7. The feed port of the coal feeder 7 is connected to the coal barrel outlet. The fuel coal can be conveyed into the furnace 9 for combustion through the coal feeder 7.

[0026] The high-level conveyor 3 is provided with a material dividing device, and the material outlet of the material dividing device is connected to a receiving hopper 5. The bed material on the high-level conveyor 3 is blocked and separated by the material dividing device to prevent the bed material from being transported into the coal barrel and mixed with the fuel coal.

[0027] Specifically, the high-level conveyor 3 is a belt conveyor, and the material separation equipment is a coal plow 4. The coal plow 4 is fixedly installed on the belt conveyor to block the conveyed bed material and separate the bed material into the receiving hopper 5, and the use effect is stable and good.

[0028] The receiving hopper 5 is fixedly mounted on a platform at a high level of the boiler. The receiving hopper 5 is located below the discharge port of the coal plow 4 to receive the bed material separated by the coal plow.

[0029] A closed enclosure 13 of a closed material distribution device and a receiving hopper 5 is fixed on the platform of the boiler described in this embodiment, and a silo roof dust collector 14 is installed on the top of the closed enclosure 13. The closed enclosure of this embodiment is a rectangular silo structure with a coal plow and a receiving hopper cover arranged inside, and a closed door is provided on the closed enclosure to facilitate entry and exit of personnel, and the high-rise conveyor is arranged to pass through the closed enclosure.

[0030] The discharge port of the hopper 5 is connected to a feeding device through a discharge pipe 6, and the output end of the feeding device is connected to the furnace 9 of the boiler. Specifically, the discharge pipe 6 of this embodiment is arranged vertically, and the discharge port of the hopper 5 is connected to the upper end of the discharge pipe 6 through a corrugated hose 15.

[0031] The feeding device is a coal feeder 7. The feeding device of this embodiment utilizes the coal feeder 7 of the fuel supply system of the boiler. The original feeding port of the coal feeder 7 is used to connect with the coal barrel. In this embodiment, a separate feeding port for connecting with the down pipe 6 is opened on the coal feeder 7.

[0032] The lower end of the feed pipe 6 is connected to the receiving port of the coal feeder 7, and the discharge port of the coal feeder 7 is connected to the furnace port of the boiler through the feed pipe 8. In order to facilitate the control of the delivery of the bed material, a first valve 16 is installed on the feed pipe 6, and a second valve 17 is installed on the feed pipe 8. The first valve 16 and the second valve 17 are both gate valves.

[0033] Working principle: The present application utilizes the coal conveying unit and coal feeder 7 for conveying fuel coal of the boiler to convey bed material. When in use, the bed material is loaded onto the ground conveyor 1 through a loader at the loading port 10 of the coal material yard, and the bed material enters the crusher 11 through the ground conveyor 1 for crushing, and the crushed bed material enters the coal dropping channel 12 through the lifting conveyor 2, and is thus transported to the high-level conveyor 3. The bed material on the high-level conveyor 3 is blocked and separated into the receiving hopper 5 by the coal plow 4, the first valve 16 is opened, the bed material enters the coal feeder 7 through the discharge pipe 6, the second valve 17 is opened, and the coal feeder 7 conveys the bed material to the furnace 9 through the discharge pipe 8. During the operation, personnel only need to monitor the working status of each equipment, eliminating the bed material bagging and reversing process and the manual bed material loading process, saving manpower hours and costs, and greatly improving production efficiency.

[0034] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A boiler automatic feeding device, comprising a boiler coal conveying unit, wherein the coal conveying unit comprises a ground conveyor (1), a lifting conveyor (2) and a high-level conveyor (3) arranged in sequence, characterized in that: The high-rise conveyor (3) is provided with a material distribution device, the material distribution device has a material receiving hopper (5) connected to its discharge port, the material receiving hopper (5) has a material feeding device connected to its discharge port via a material feeding pipe (6), and the output end of the material feeding device is in communication with the furnace (9) of the boiler.

2. The automatic boiler feeding device according to claim 1, characterized in that: The material distribution equipment is a coal plow (4).

3. The automatic boiler feeding device according to claim 1 is characterized in that: The feeding device is a coal feeder (7), the lower end of the feed pipe (6) is connected to a feed receiving port of the coal feeder (7), and the discharge port of the coal feeder (7) is connected to a furnace port of the boiler via a feed pipe (8).

4. The automatic boiler feeding device according to claim 3 is characterized in that: A second valve (17) is installed on the drop pipe (8).

5. The automatic boiler feeding device according to claim 1 is characterized in that: A first valve (16) is installed on the discharge pipe (6).

6. The automatic boiler feeding device according to claim 1, characterized in that: The discharge port of the receiving hopper (5) is connected to the upper end of the discharge pipe (6) via a corrugated hose (15).

7. The automatic boiler feeding device according to claim 1, characterized in that: A closed enclosure (13) for enclosing the material distribution equipment and the material receiving hopper (5) is provided on the platform of the boiler, and a silo top dust collector (14) is provided on the closed enclosure.

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