CN113203092A

CN113203092A - Biomass pretreatment feeding device based on circulating fluidized bed

Info

Publication number: CN113203092A
Application number: CN202110429721.4A
Authority: CN
Inventors: 张彦; 李行健; 刘振业; 何润华; 陈凌轩
Original assignee: Wuhan University of Technology WUT
Current assignee: Wuhan University of Technology WUT
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-08-03

Abstract

A biomass pretreatment feeding device based on a circulating fluidized bed comprises a rack, a feeding hopper, a feeding motor and a conveying cylinder, wherein the rack is provided with an upper layer frame and a lower layer frame; a discharge port at the bottom of the feeding hopper is connected with a die assembly, an outlet of the die assembly is connected with an inlet of a feeding cylinder, a spiral auger is arranged in the feeding cylinder, a discharge pipe of the feeding cylinder is connected with a feeding pipe of a circulating fluidized bed, a preheater is arranged in the discharge pipe, a feeding motor is arranged at the end part of the feeding cylinder, and a driving shaft of the feeding motor is connected with the spiral auger; the bottom of frame is provided with the pay-off fan, the mouth of pipe of inlet pipe is just to the air outlet of pay-off fan. The invention can pretreat biomass, has good die pressing and stable feeding, and ensures the high-efficiency operation of the circulating fluidized combustion device.

Description

Biomass pretreatment feeding device based on circulating fluidized bed

Technical Field

The invention relates to the technical field of biomass pretreatment feeding, in particular to a biomass pretreatment feeding device based on a circulating fluidized bed.

Background

Along with the increase of energy demand, the cost of fossil energy such as coal and petroleum is increased, the cost of novel clean energy such as biomass energy, wind energy and hydroenergy is much lower, the traditional fossil fuel is easy to cause irreversible pollution to the environment, meanwhile, the public pays more and more attention to environmental protection, the development and utilization of clean energy become important research contents in the current energy field, and the development of clean energy industries such as breeding a huge clean energy industry and supporting biomass is an important content of energy production revolution.

However, in the rural areas, the straw resources are not well utilized, and a large amount of smoke dust, oxysulfide and nitric oxide are released by direct combustion. These substances can directly harm human and livestock, produce acid rain and form a greenhouse effect. Therefore, the novel rural central heating mode which has the advantages of high combustion efficiency, high thermal efficiency, no emission of atmospheric pollutants and the like has great significance. And the biomass pretreatment device based on the circulating fluidized bed combustion device can produce high-quality biomass particles, and ensures the efficient operation of the circulating fluidized bed combustion device. Therefore, the problem of environmental pollution caused by burning a large amount of straw and other biomass resources in northern areas can be solved, and good economic and social benefits are achieved.

Disclosure of Invention

In order to solve the problems, the invention provides a biomass pretreatment feeding device based on a circulating fluidized bed, and the specific technical scheme is as follows:

a biomass pretreatment feeding device based on a circulating fluidized bed comprises a rack, a feeding hopper, a feeding motor and a conveying cylinder, wherein the rack is provided with an upper layer frame and a lower layer frame; a discharge port at the bottom of the feeding hopper is connected with a die assembly, an outlet of the die assembly is connected with an inlet of a feeding cylinder, a spiral auger is arranged in the feeding cylinder, a discharge pipe of the feeding cylinder is connected with a feeding pipe of a circulating fluidized bed, a preheater is arranged in the discharge pipe, a feeding motor is arranged at the end part of the feeding cylinder close to the inlet of the feeding cylinder, and a driving shaft of the feeding motor is connected with the spiral auger; and a feeding fan is arranged at the bottom of the frame, and an air outlet of the feeding fan is over against the pipe orifice of the feeding pipe so that the material is blown into the circulating fluidized bed.

Further, the die assembly adopts a compression roller type forming process.

Further, the die assembly forms the biomass die through rolling and rolling movement between the toothed pressing roller and the perforated plate.

Further, the preheater is a ceramic preheater.

Further, the feeding motor is a speed reduction motor.

And the control panel controls the die assembly, the feeding motor, the feeding fan and the preheater.

Has the advantages that:

the invention can pretreat biomass, has good die pressing and stable feeding, and ensures the high-efficiency operation of the circulating fluidized combustion device.

Drawings

Fig. 1 is an overall schematic view of the present invention.

Fig. 2 is a sectional view of a feed motor and a feed delivery cylinder according to the present invention.

FIG. 3 is a process flow diagram of the present invention.

In the figure: the device comprises a feeding hopper 1, a rack 2, an upper shelf 21, a lower shelf 22, a feeding motor 3, a feeding fan 4, a preheater 5, a feeding cylinder 6, a die assembly 7, a spiral auger 9, a discharging pipe 10 and a feeding pipe 11.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments:

as shown in fig. 1-3, a biomass pretreatment feeding device based on a circulating fluidized bed comprises a frame 2, a feeding hopper 1, a feeding motor 3 and a feeding cylinder 6, wherein the frame 2 is provided with an upper frame 21 and a lower frame 22, the feeding hopper 1 is arranged on the upper frame 21, and the feeding motor 3 and the feeding cylinder 6 are arranged on the lower frame 22; a discharge port at the bottom of the feeding hopper 1 is connected with a die assembly 7, an outlet of the die assembly 7 is connected with an inlet of a material conveying cylinder 6, a spiral auger 9 is arranged in the material conveying cylinder 6, and a certain gap is formed between the spiral auger 9 and the material conveying cylinder 6 at the outer side of the spiral auger 9 to prevent biomass particles from being extruded and cracked mutually; a discharge pipe 10 of the material conveying cylinder 6 is connected with a feed pipe 11 of the circulating fluidized bed, a preheater 5 is arranged in the discharge pipe 10, the feeding motor 3 is arranged at the end part of the material conveying cylinder 6 close to the inlet of the material conveying cylinder, and a drive shaft of the feeding motor 3 is connected with a spiral auger 9; and a feeding fan 4 is arranged at the bottom of the frame 2, and an air outlet of the feeding fan 4 is over against the pipe orifice of the feeding pipe 11 so that the material is blown into the circulating fluidized bed.

In this embodiment, the die assembly 7 adopts a compression roller type forming process; the molding process is accompanied by a large amount of friction heat, so that the temperature of the raw material is continuously increased, a series of physicochemical changes such as defibrination and gelatinization occur, the internal bonding degree is increased, cylindrical particles with certain strength are formed, and the molding process is completed. The layout of the die assembly 7 and the installation of the feeding motor 3 are comprehensively considered, and the flat die pressing roller is adopted as a forming scheme in the project. The die assembly 7 forms a straw die through rolling motion between the toothed compression roller and the hole plate, and straw powder is continuously extruded through the rolling motion between the toothed compression roller and the die with the extrusion port, so that the raw material is continuously increased in density and is discharged outwards through the circular hole in the die.

In this embodiment, the preheater 5 is a ceramic preheater 5, the ceramic heater is a heater with high efficiency and uniform heat distribution, and the temperature of the hot surface is uniform, so that the biomass straw can be quickly preheated.

In this embodiment, the feeding motor 3 is a speed reduction motor.

In this embodiment, the feeding device further comprises a control panel, and the control panel controls the die assembly 7, the feeding motor 3, the feeding fan 4 and the preheater 5.

As shown in the flow chart of the biomass pretreatment process shown in fig. 3, straw biomass is poured into the feeding hopper 1, so that the straw enters the die assembly 7 right below the feeding hopper 1; straw particles are formed in the die assembly 7 and are discharged outwards, the straw particles are fed in by the rotation of the spiral auger 9 under the action of the feeding motor 3, the straw particles are conveyed into the preheater 5 at the outlet of the material conveying cylinder 6, and the temperature of the hot surface is uniform, so that the straw particles are quickly preheated; the preheated straw particles fall into the feeding pipe 11 and are blown into the circulating fluidized bed by the feeding fan 4.

Claims

1. The utility model provides a living beings preliminary treatment feed arrangement based on circulating fluidized bed which characterized in that: the feeding hopper is arranged on the upper layer frame, and the feeding motor and the conveying cylinder are arranged on the lower layer frame; a discharge port at the bottom of the feeding hopper is connected with a die assembly, an outlet of the die assembly is connected with an inlet of a feeding cylinder, a spiral auger is arranged in the feeding cylinder, a discharge pipe of the feeding cylinder is connected with a feeding pipe of a circulating fluidized bed, a preheater is arranged in the discharge pipe, a feeding motor is arranged at the end part of the feeding cylinder close to the inlet of the feeding cylinder, and a driving shaft of the feeding motor is connected with the spiral auger; and a feeding fan is arranged at the bottom of the frame, and an air outlet of the feeding fan is over against the pipe orifice of the feeding pipe so that the material is blown into the circulating fluidized bed.

2. The biomass pretreatment feeding device based on the circulating fluidized bed as claimed in claim 1, characterized in that: the die assembly adopts a compression roller type forming process.

3. The biomass pretreatment feeding device based on the circulating fluidized bed as claimed in claim 2, characterized in that: the die assembly forms a biomass die through rolling and rolling movement between the toothed press roll and the perforated plate.

4. The biomass pretreatment feeding device based on the circulating fluidized bed as claimed in claim 1, characterized in that: the preheater is a ceramic preheater.

5. The biomass pretreatment feeding device based on the circulating fluidized bed as claimed in claim 1, characterized in that: the feeding motor is a speed reducing motor.

6. The biomass pretreatment feeding device based on the circulating fluidized bed as claimed in claim 1, characterized in that: the device also comprises a control panel, and the control panel controls the die assembly, the feeding motor, the feeding fan and the preheater.