CN2705710Y - Environment protection vertical coal burning boiler - Google Patents

Abstract

The utility model discloses a kind of environment-friendly type vertical fire coal boiler, take the underfeed firing device, and be provided with screw stoker, make fire coal send into burner hearth from bottom to top equably, form burning from top to bottom, while is at the upside of boiler combustion layer, be provided with the secondary air device, make the further mixed combustion of fuel gas and air, the flow process of prolong smoke and flying dust changes the full level of air-flow to burner hearth, in burner hearth, form the secondary air curtain, pin the fly ash particle in the flue gas, thereby not only improved the efficiency of combustion of boiler effectively, and alleviated the pollution of coal-burning boiler greatly atmosphere.

Description

Environmentally friendly vertical coal-fired boiler

                                                                                 

The utility model relates to a coal-fired boiler, which belongs to the technical field of boiler manufacturing.

                  II. Background technology

Existing vertical coal-fired boilers usually use manual coal feeding. Since coal is periodically thrown on the burning coal seam from the furnace door, the combustion process of this manual coal-feeding vertical coal-fired boiler is also periodic. . After the coal is fed, the volatile matter of the coal is separated out, and the amount of air required for combustion is large. After that, the volatile matter is slowly decomposed, and the air required is gradually reduced. However, the air supply in the boiler is basically unchanged during the coal combustion process. Therefore, the air in the furnace is insufficient after the coal is thrown in, and the combustion is incomplete, and a large amount of black smoke emits from the chimney, causing serious environmental pollution. In addition, due to incomplete combustion, not only a large amount of combustion heat loss is caused, but also precious energy resources are wasted.

                              Three. Content

In view of the above-mentioned problems, the purpose of this utility model is to provide an environmentally friendly vertical coal-fired boiler with reasonable structure, sufficient combustion, high thermal efficiency, and can greatly reduce the intensity of the furnace worker's Labor Day.

In order to achieve the above object, the utility model has taken the following technical measures:

The environment-friendly vertical coal-fired boiler described in the utility model adopts a bottom-feeding combustion device, and is equipped with a spiral coal stoker, so that the coal is evenly fed into the furnace from bottom to top, forming a top-down combustion, and at the same time On the upper side of the combustion layer of the boiler, a secondary air intake device is installed to further mix and burn combustible gas and air, prolong the flow of flue gas and fly ash, change the filling degree of the airflow to the furnace, and form a secondary air curtain in the furnace. The fly ash particles in the flue gas are locked, which not only effectively improves the combustion efficiency of the boiler, but also greatly reduces the pollution of the coal-fired boiler to the atmosphere.

                                                                                       

Fig. 1 is a structural representation of the utility model

Among them: 1-Pot shell head 2-Pot shell 3-Base 4-Cupola 5-Furnace top 6-Furnace hearth 7-Smoke pipe 8-Smoke baffle 9-Horizontal water pipe 10-Grate 11-Power drive device 12- Coaling hopper 13-Screw conveyor 14-Fan 15-Secondary air inlet pipe 16-Air volume adjustment device 17-Secondary air inlet

V. Specific implementation methods

The environment-friendly vertical coal-fired boiler includes three parts: the pot shell head 1, the pot shell 2 and the base 3. In the pot shell 2, there are a cupola 4, a furnace top 5, a furnace 6 and a smoke pipe 7; A horizontal water pipe 9 is arranged inside; a fire grate 10 is arranged between the furnace 6 and the base 3 .

Outside the base 3 of the vertical coal-fired boiler, a spiral coal feeding mechanism and a secondary air intake device are arranged. The screw coal feeding mechanism is composed of a power drive device 11, a coal feeding hopper 12 and a screw conveyor 13, and the screw conveyor 13 is arranged below the fire grate 10 to form a downward feeding type combustion device. When burning, the coal is fed into the furnace from the bottom of the grate 10 through the screw conveyor 13, from bottom to top through the grate, forming a top-to-bottom feeding back-burning mechanism, which ensures that the coal is fully burned .

The secondary air inlet device is composed of a fan 14, a secondary air inlet pipe 15 and a secondary air inlet 17. The secondary air inlet 17 is higher than the upper side of the combustion layer of the furnace; it can further mix the combustible gas and air in the furnace Combustion, prolonging the flow of flue gas and fly ash, changing the filling degree of the airflow to the furnace, forming a secondary air curtain in the furnace, locking the fly ash particles in the flue gas, and improving the combustion efficiency of the boiler.

In order to make the boiler adapt to coal with different heat qualities and ensure its full combustion, an air volume regulating device 16 is also provided on the secondary air inlet pipe 15 . The air volume regulating device 16 can arbitrarily adjust the secondary air intake volume of coal with different heat quality.

In addition, in the middle of the furnace, there is also a partition 8, which can effectively filter the fly ash particles in the flue gas and further purify the environment.

Claims (4)

1. An environment-friendly vertical coal-fired boiler comprising a pot shell head (1), a pot shell (2) and a base (3), characterized in that the vertical coal-fired boiler base (3) is provided with The spiral coal feeding mechanism and the secondary air inlet device, the spiral coal feeding mechanism is composed of a power drive device (11), a coal feeding hopper (12) and a screw conveyor (13), and the screw conveyor (13) is arranged on the grate (10 ) constitutes a downward feeding combustion device. 2. The environment-friendly vertical coal-fired boiler according to claim 1, characterized in that said secondary air inlet device consists of a fan (14), a secondary air inlet pipe (15) and a secondary air inlet (17) Constituted, the secondary air inlet (17) is higher than the upper side of the furnace combustion layer. 3. The environment-friendly vertical coal-fired boiler according to claim 2, characterized in that the secondary air inlet pipe (15) is provided with an air volume adjustment device (16). 4. The environment-friendly vertical coal-fired boiler according to claim 1, characterized in that a partition (8) is provided in the middle of the furnace.