CN106439893A - Combustion furnace uniform feeder - Google Patents

Abstract

The invention discloses a uniform feeder for a combustion furnace, which comprises a feeder, a lower hopper, a feeding pipe and a combustion chamber; the lower end of the feeder is connected to the lower hopper, and the lower hopper communicates with the combustion chamber through the feeding pipe. Wherein, a turner is installed at the discharge port of the lower hopper, and the turner includes a rotating shaft driven by a motor, a number of baffles arranged along the axial direction of the rotating shaft, and the gap between the two adjacent baffles and the rotating shaft A V-shaped silo is formed between them; the feeding pipe includes a vertical feeding section connected with the lower hopper, and an inclined feeding section connected with the combustion chamber. Several honeycomb-shaped air inlets are arranged on the inclined feeding section, and a blower It is connected with the air inlet through the air inlet duct. One side inner wall of the lower hopper is a slope feed wall, and the lower end of the slope feed wall is provided with several auxiliary vertical feed pipes, and the auxiliary vertical feed pipes communicate with the slope feed wall and the inclined feeding section of the feed pipe.

Description

A uniform feeder for a combustion furnace

technical field

The invention relates to the technical field of industrial boilers, in particular to a uniform feeder for a combustion furnace.

Background technique

Biomass fuel: refers to the burning of biomass materials as fuel, generally mainly agricultural and forestry waste (such as straw, sawdust, bagasse, rice bran, etc.), which is mainly different from fossil fuels. In the current national policy and environmental protection standards, direct combustion of biomass is a highly polluting fuel, which is only used in large stoves in rural areas and is not allowed to be used in cities. The application of biomass fuel is actually mainly biomass molding fuel (Biomass MouldingFuel, referred to as "BMF"), which uses agricultural and forestry waste as raw materials, and through crushing, mixing, extrusion, drying and other processes, it is made into various moldings (such as block Shape, granular, etc.), a new type of clean fuel that can be burned directly.

In today's energy shortage, the development of renewable energy has become a global hot issue. At present, there are a large number of biomass fuels in the vast rural areas, and the utilization rate of these biomass fuels is extremely low due to the lack of matching, new and efficient combustion devices. In order to solve the problem of biomass fuel combustion, traditional coal-fired boilers have been improved to make them suitable for biomass combustion.

However, when most boilers burn biomass fuel at present, first, flashbacks are likely to occur during the combustion process, that is, the flame in the furnace is ejected to the side of the hopper due to the increase in internal combustion pressure, resulting in a fire in the hopper. The fuel burns in the hopper, and in severe cases, the hopper and the entire feeding system will be burned out, so that the boiler cannot feed normally; secondly, when burning granular biomass fuel, the single-inlet feeding hopper is prone to blockage The situation affects the normal use and economic benefits of the boiler.

Contents of the invention

The object of the present invention is to provide a uniform feeder for a combustion furnace to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A uniform feeder for a combustion furnace, comprising a feeder, a lower hopper, a feeding pipe and a combustion chamber; the lower end of the feeder is connected to the lower hopper, and the lower hopper communicates with the combustion chamber through the feeding pipe, wherein the lower hopper A turner is installed at the discharge port of the machine, and the turner includes a rotating shaft driven by a motor, a number of baffles arranged along the axial direction of the rotating shaft, and a V is formed between two adjacent baffles and the rotating shaft. type feeder; the feeder includes a housing, and the upper and lower ends of the housing are respectively formed with a feed end and a discharge end, and a movable shaft is arranged between the housing and the feed end and the discharge end , one of the movable shafts is connected with the drive motor; the inside of the housing forms a first cavity communicated with the feed end, and a second cavity communicated with the discharge end, the inside of the first cavity A first distribution feed ring and a second distribution feed ring are provided, and a plurality of distribution grooves are formed on the inner walls around the first cavity, and horizontal distribution strips are arranged at the bottom of the distribution grooves, and the distribution grooves are connected with the second distribution grooves. The cavity is connected, and the feeding pipe includes a vertical feeding section connected with the lower hopper, and an inclined feeding section connected with the combustion chamber. There are several honeycomb-shaped air inlets on the inclined feeding section, and a blower passes through the air inlet pipe. Connected to the air inlet. One side inner wall of the lower hopper is a slope feed wall, and the lower end of the slope feed wall is provided with several auxiliary vertical feed pipes, and the auxiliary vertical feed pipes communicate with the slope feed wall and the inclined feeding section of the feed pipe.

As a further technical solution of the present invention, the first distribution feed ring includes a plurality of first distribution feed bodies arranged in a ring, the first distribution feed bodies are provided with longitudinal slots, and inclined Up the first distribution sheet.

As a further technical solution of the present invention, the second distribution feed ring includes a plurality of second distribution feed bodies arranged in a ring, the second distribution feed bodies are provided with longitudinal slots, and the longitudinal slots are provided with There is a second distribution sheet sloping downwards.

As a further technical solution of the present invention, the inner wall of one side of the lower hopper is a slope feed wall, and the lower end of the slope feed wall is provided with several auxiliary vertical feed pipes, and the auxiliary vertical feed pipes are connected to the slope feed wall. And the inclined feeding section of the feeding pipe.

As a further technical solution of the present invention, a fire baffle is installed at the end of the feed pipe connected to the combustion chamber, and the fire baffle is installed at the end of the feed pipe through a rotating shaft.

Compared with the prior art, the present invention has a very good fire-blocking effect. During use, it has achieved good anti-blocking treatment for the early entry of materials, and it is extremely convenient to clean, and it is convenient to observe the feeding situation of materials, and timely Adjustment, the biomass powder that enters from the feed hopper can enter the combustion chamber from the tumbler during the feeding process, and part of it enters the combustion chamber from the auxiliary vertical feed pipe, which greatly alleviates the situation of blockage and poor feeding, and improves the Combustion efficiency; the feeder can effectively disperse the feed material evenly and improve the circulation efficiency.

Description of drawings

Fig. 1 is a schematic structural view of a uniform feeder for a combustion furnace according to the present invention.

Fig. 2 is a structural schematic diagram of the flipper in the present invention.

detailed description

The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.

Please refer to Figures 1-2, a uniform feeder for a combustion furnace, including a feeder 1, a lower hopper 2, a feeding pipe and a combustion chamber 9; the lower end of the feeder 1 is connected to the lower hopper, and the lower hopper 2 passes through the The feeding pipe communicates with the combustion chamber 9, wherein a turner 3 is installed at the discharge port of the lower hopper 2, and the turner 3 includes a rotating shaft 32 driven by a motor, and several shafts arranged along the axial direction of the rotating shaft 32 Baffles 31, a V-shaped feed bin 33 is formed between two adjacent baffles 31 and the rotating shaft 32; the feeder 1 includes a housing 11, and feeding ends are formed at the upper and lower ends of the housing 11 12 and the discharge end 13, a movable shaft 14 is arranged between the housing 11 and the feed end 12 and the discharge end 13, and one of the movable shafts 14 is connected with the drive motor; the inside of the housing 11 forms a The first cavity 15 communicated with the feed end 12, and the second cavity 16 communicated with the discharge end 13, the inside of the first cavity 15 is provided with a first distribution feed ring and a second distribution ring. The feeding ring forms a plurality of distribution grooves 17 on the inner wall around the first cavity 15, and the bottom end of the distribution grooves 17 is provided with horizontal distribution strips 18, and the distribution grooves 17 communicate with the second cavity 16, and the first The distribution feed ring includes a plurality of first distribution feed bodies 19 arranged in a ring, the first distribution feed body 19 is provided with a longitudinal slot 111, and a first distribution sheet inclined upward is provided in the longitudinal slot 111; The second distribution feed ring includes a plurality of second distribution feed bodies 112 arranged in a ring, and the second distribution feed body 112 is provided with longitudinal slots 110, and in the longitudinal slots 110, inclined downward The second distribution sheet: the number of distribution sheets on the first distribution feed body 19 is 3, and the number of distribution sheets on the second distribution feed body 112 is 2.

In the actual operation process, the material enters from the feed end 12, passes through the first cavity 15 and the second cavity 16, and finally exits from the discharge end 13; when the material enters the first cavity 15, the entire shell will be affected by the The driving motor drives the movable rotating shaft 14 to rotate at a high speed, so that the material will be chopped by the first distribution feed ring and the second distribution feed ring in the first cavity 15, and the condensed material blocks are evenly distributed, while the first distribution feed ring Both the distribution feed body 19 and the second distribution feed body 112 are provided with longitudinal slots 110, and the distribution body 11 provided on the slots 10 will chop and distribute the materials evenly, and then the materials pass through the distribution slots 17, After passing through the distribution strip 18, the material enters the second cavity 16, and finally the material will be mixed and distributed evenly when it goes out from the discharge end 13;

The feed pipe includes a vertical feeding section 5 connected to the hopper 2, and an inclined feeding section 6 connected to the combustion chamber 9, the angle between the vertical feeding section 5 and the inclined feeding section 6 is 35°-45° °, some honeycomb-shaped air inlets are arranged on the inclined feeding section 6, and a blower 4 is connected with the air inlet through the air inlet pipe. When in use, the user can input high-pressure air into the feeding pipe through the blower, and the high-pressure air acts on the feeding pipe to avoid the blockage of biomass fuel in the feeding pipe. In order to avoid its tempering phenomenon;

The inner wall of one side of the lower hopper 2 is a slope feed wall 2, the angle between the slope feed wall 2 and the horizontal plane is 50°-80°, the lower end of the slope feed wall 2 is provided with several auxiliary vertical feed pipes 10 , the auxiliary vertical feeding pipe 10 communicates with the slope feeding wall 2 and the inclined feeding section 6 of the feeding pipe 1. In a preferred embodiment of the present invention, there are 3 to 5 auxiliary vertical feeding pipes. During the process, the biomass powder entering from the feeding hopper can enter from the turner 3 during the feeding process, and part of it enters the combustion chamber from the auxiliary vertical feeding pipe, which greatly alleviates the situation of blockage and poor feeding. Improved combustion efficiency.

A fire baffle 8 is installed at the end where the feeding pipe is connected to the combustion chamber 9, and the fire baffle 8 is installed at the end of the feeding pipe through a rotating shaft 7, and can turn to the combustion chamber 9 side;

When feeding is required, the user can drive the rotating shaft 32 to rotate by starting the motor. Since the turner 3 is connected to the lower hopper 2, the V-shaped silo 33 on the side connected to the lower hopper 2 of the turner 3 is filled with biomass fuel. , due to the rotation of the rotating shaft 32, the V-shaped silo 33 filled with biomass fuel rotates to the side connected to the feeding pipe, and the biomass fuel falls into the feeding pipe under its own gravity, and acts on the fire baffle through the feeding pipe 8, so that the relative rotation of the fire baffle 8, thereby entering the combustion chamber 9, to complete the feeding.

A fire baffle 8 is installed at the end of the feeding pipe to realize the isolation between the combustion chamber 9 and the lower hopper 2 to ensure its anti-tempering effect, and when the gravity of the biomass fuel in the feeding pipe acts on the baffle, the material baffle Rotate to one side of the combustion chamber 9, so as to realize automatic feeding, and once the gravity in the feeding pipe is lost, the positive pressure generated in the combustion chamber 9 makes the baffle completely close the output end of the feeding pipe, realizing its The function of blocking tempering.

The preferred implementation of this patent has been described in detail above, but this patent is not limited to the above-mentioned implementation. Within the scope of knowledge of those of ordinary skill in the art, various implementations can be made without departing from the purpose of this patent. kind of change.

Claims (4)

1. A uniform feeder for a combustion furnace, characterized in that it comprises a feeder, a lower hopper, a feeding pipe and a combustion chamber; the lower end of the feeder is connected to the lower hopper, and the lower hopper is connected to the combustion chamber by the feeding pipe Through, wherein, a turner is installed at the outlet of the lower hopper, and the turner includes a rotating shaft driven by a motor, a number of baffles arranged along the axial direction of the rotating shaft, two adjacent baffles and the described A V-shaped feed bin is formed between the rotating shafts; the feeder includes a housing, and a feed end and a discharge end are respectively formed at the upper and lower ends of the housing, and the housing is connected with the feed end and the discharge end. There are movable shafts between them, one of which is connected to the drive motor; the inside of the housing forms a first cavity communicated with the feed end, and a second cavity communicated with the discharge end, the The inside of the first cavity is provided with a first distribution feed ring and a second distribution feed ring, and a plurality of distribution grooves are formed on the inner wall around the first cavity, and horizontal distribution strips are arranged at the bottom of the distribution grooves to distribute The groove communicates with the second cavity, and the feeding pipe includes a vertical feeding section connected with the lower hopper, and an inclined feeding section connected with the combustion chamber, and several honeycomb air inlets are arranged on the inclined feeding section, A blower is connected with the air inlet through the air inlet duct. 2. The inner wall of one side of the lower hopper is a slope feeding wall, and the lower end of the slope feeding wall is provided with several auxiliary vertical feeding pipes, and the auxiliary vertical feeding pipes are connected with the inclined feeding wall and the feeding pipe. Section, the first distribution feed ring includes a plurality of first distribution feed bodies arranged in a ring, the first distribution feed body is provided with a longitudinal slot, and a first distribution piece inclined upward is arranged in the longitudinal slot, The second distribution feed ring includes a plurality of second distribution feed bodies arranged in a ring, the second distribution feed body is provided with a longitudinal slot, and a second distribution sheet inclined downward is arranged in the longitudinal slot . 3. A uniform feeder for a combustion furnace according to claim 1, wherein the inner wall on one side of the lower hopper is a slope feed wall, and the lower end of the slope feed wall is provided with several auxiliary vertical feed pipes . A uniform feeder for a combustion furnace according to claim 2, characterized in that the auxiliary vertical feed pipe communicates with the slope feed wall and the inclined feeding section of the feed pipe. 4. A uniform feeder for a combustion furnace according to claim 1, characterized in that a fire baffle is installed at the end where the feed pipe is connected to the combustion chamber, and the fire baffle is installed on the feeder through a rotating shaft. The end of the tube can be turned to the side of the combustion chamber.