CN113369016A - Screening system for biomass power generation system coupled with coal burner unit - Google Patents

Screening system for biomass power generation system coupled with coal burner unit Download PDF

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Publication number
CN113369016A
CN113369016A CN202110640772.1A CN202110640772A CN113369016A CN 113369016 A CN113369016 A CN 113369016A CN 202110640772 A CN202110640772 A CN 202110640772A CN 113369016 A CN113369016 A CN 113369016A
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China
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biomass
screen
screening
gas
screening system
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CN202110640772.1A
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Chinese (zh)
Inventor
关欣华
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Shandong Juneng Biomass Energy Co ltd
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Shandong Juneng Biomass Energy Co ltd
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Priority to CN202110640772.1A priority Critical patent/CN113369016A/en
Publication of CN113369016A publication Critical patent/CN113369016A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03CMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00Magnetic separation
    • B03C1/02Magnetic separation acting directly on the substance being separated
    • B03C1/30Combinations with other devices, not otherwise provided for

Abstract

The application discloses used screening system of coal burner group coupling biomass power generation system, this screening system includes: the iron removal device is used for removing iron impurities in the biomass particles; the screening device is communicated with the biomass particle outlet of the iron removal device and is used for removing large-particle non-metallic impurities in the biomass particles; the gas-powder separation device is communicated with an outlet of the biomass particles of the screening device and is used for removing dust in the biomass particles; and the feeding device is arranged at the bottom of the gas-powder separation device and is used for conveying the screened biomass particles. The screening system removes impurities and dust in biomass particles, so that biomass can be more fully combusted, and the combustion efficiency of the biomass particles is improved.

Description

Screening system for biomass power generation system coupled with coal burner unit
Technical Field
The application relates to the technical field of new energy, in particular to a screening system for a biomass power generation system coupled with a coal burner group.
Background
The biomass fuel is prepared by burning biomass materials as fuel, and is mainly agricultural and forestry waste (such as straw, sawdust, bagasse, rice chaff and the like). Mainly distinguished from fossil fuels. In the current national policy and environmental protection standard, the direct combustion biomass belongs to a high-pollution fuel, is only used in a rural large stove and is not allowed to be used in a city. The application of biomass fuel, which is actually mainly biomass briquette fuel (BMF), is a novel clean fuel which is prepared by using agricultural and forestry wastes as raw materials and performing the processes of crushing, mixing, extruding, drying and the like to prepare various briquettes, granules and the like and can be directly combusted.
The biomass fuel can replace fossil fuel to generate electricity, but the combustion efficiency of the biomass fuel is insufficient, and the energy conversion rate is not high.
Disclosure of Invention
The purpose of the embodiment of the application is to provide a screening system for a coal burner set coupled biomass power generation system, so as to solve the problems that the existing biomass fuel is insufficient in combustion efficiency and low in energy conversion rate.
The technical scheme of the application is as follows:
according to a first aspect of embodiments of the present application, there is provided a screening system for a coal fired unit coupled biomass power generation system, the screening system may include:
the iron removal device is used for removing iron impurities in the biomass particles;
the screening device is communicated with the biomass particle outlet of the iron removal device and is used for removing large-particle non-metallic impurities in the biomass particles;
the gas-powder separation device is communicated with an outlet of the biomass particles of the screening device and is used for removing dust in the biomass particles;
and the feeding device is arranged at the bottom of the gas-powder separation device and is used for conveying the screened biomass particles.
Further, the deironing device includes: magnetic pole core, winding and heat conducting plate;
n heat conducting plates are arranged in parallel, wherein N is an integer greater than 2;
the magnetic pole core is columnar and penetrates through N heat-conducting plates, the axial direction of the magnetic pole core is perpendicular to the heat-conducting plates, the N heat-conducting plates divide the magnetic pole core into N-1 sections of winding areas, and the winding is sleeved on the N-1 sections of winding areas.
Furthermore, the material of the winding is an oxide film aluminum strip, and the material of the heat conducting plate is aluminum.
Further, deironing device still includes:
the radiating fins are fixedly connected with the N heat conducting plates.
Further, the screening device is a rolling screen or a vibrating screen.
Further, the screening device comprises: the screen plate, the upper vibrating screen and the lower vibrating screen are sequentially arranged from top to bottom;
the mesh sieve plate is obliquely arranged in the shell;
the upper layer vibrating screen is arranged in parallel with the mesh sieve plate;
the lower layer vibrating screen is obliquely arranged in the shell.
Furthermore, the upper layer vibrating screen is formed by combining metal strips, the metal strips are wavy, two adjacent metal strips are symmetrically arranged, and the wavy shape is bent to form a screen hole in the upper layer vibrating screen;
the lower vibrating screen is composed of a first screen and a second screen which are overlapped, and screen holes in the first screen and screen holes in the second screen are distributed in a mutually staggered mode.
Further, the gas-powder separating device comprises: a biomass particle inlet, a gas powder outlet and a biomass particle recovery port;
the biomass particle inlet is communicated with a biomass discharge port of the screening device;
the gas powder discharge port is provided with a gas powder discharge pipe, and the outlet end part of the gas powder discharge pipe is provided with a particle filter screen and a conical guide plate;
the biomass particle recovery port is provided with a biomass particle recovery barrel, a grid filter layer is arranged in the biomass particle recovery barrel, a vortex type guide plate is arranged on the grid filter layer, a gas-powder separation channel, a gas discharge port and a biomass particle return port are arranged in the vortex type guide plate, a dome-shaped filter cloth is arranged on the vortex type guide plate, and an exhaust hood is arranged above the dome-shaped filter cloth;
the conical top of the conical guide plate is inserted into the grid filter layer, and a gas-powder distribution channel is arranged between the conical guide plate and the grid filter layer.
Further, the screening system further comprises: a spraying device;
the spraying device is arranged above the screening device and is used for spraying in the screening process of the screening device.
Further, the feeding device is a screw feeder, a belt feeder or a pipe belt machine.
The technical scheme provided by the embodiment of the application at least has the following beneficial effects:
the screening system of the embodiment of the application removes iron impurities in the biomass particles by using the iron removing device, removes large-particle non-metal impurities in the biomass particles by using the screening device, removes dust in the biomass particles by using the gas-powder separating device, and removes impurities and dust in the biomass particles by using the feeding device for conveying the screened biomass particles, so that the biomass can be more fully combusted, and the combustion efficiency of the biomass particles is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application and are not to be construed as limiting the application.
FIG. 1 is a schematic illustration of a screening system for a coal fired unit coupled biomass power generation system according to an exemplary embodiment;
FIG. 2 is a schematic illustration of a screening system for a coal fired unit coupled biomass power generation system according to one embodiment.
Detailed Description
In order to make the technical solutions of the present application better understood by those of ordinary skill in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
In a first aspect of an embodiment of the present application, as shown in fig. 1, there is provided a screening system for a coal fired unit coupled biomass power generation system, the screening system may include:
the iron removal device is used for removing iron impurities in the biomass particles;
the screening device is communicated with the biomass particle outlet of the iron removal device and is used for removing large-particle non-metallic impurities in the biomass particles;
the gas-powder separation device is communicated with an outlet of the biomass particles of the screening device and is used for removing dust in the biomass particles;
and the feeding device is arranged at the bottom of the gas-powder separation device and is used for conveying the screened biomass particles.
According to the screening system, the iron impurities in the biomass particles are removed by the iron removing device, the large-particle nonmetal impurities in the biomass particles are removed by the screening device, the dust in the biomass particles is removed by the gas-powder separating device, the screened biomass particles are conveyed by the feeding device, the impurities and the dust in the biomass particles are removed, the biomass can be more sufficiently combusted, and the combustion efficiency of the biomass particles is improved.
In some optional embodiments of the present application, the iron removal device comprises: magnetic pole core, winding and heat conducting plate;
n heat conducting plates are arranged in parallel, wherein N is an integer greater than 2;
the magnetic pole core is columnar and penetrates through N heat-conducting plates, the axial direction of the magnetic pole core is perpendicular to the heat-conducting plates, the N heat-conducting plates divide the magnetic pole core into N-1 sections of winding areas, and the winding is sleeved on the N-1 sections of winding areas.
In some alternative embodiments of the present application, the material of the winding is a strip of alumina and the material of the thermally conductive plate is aluminum.
In some optional embodiments of the present application, the iron removal device further comprises:
the radiating fins are fixedly connected with the N heat conducting plates.
In some alternative embodiments of the present application, the screening device is a roller screen or a vibrating screen.
In some optional embodiments of the present application, the screening device comprises: the screen plate, the upper vibrating screen and the lower vibrating screen are sequentially arranged from top to bottom;
the mesh sieve plate is obliquely arranged in the shell;
the upper layer vibrating screen is arranged in parallel with the mesh sieve plate;
the lower layer vibrating screen is obliquely arranged in the shell.
In some optional embodiments of the present application, the upper vibrating screen is formed by combining metal strips, the metal strips are in a wave shape, two adjacent metal strips are symmetrically arranged, and the wave shape is bent to form the screen holes in the upper vibrating screen;
the lower vibrating screen is composed of a first screen and a second screen which are overlapped, and screen holes in the first screen and screen holes in the second screen are distributed in a mutually staggered mode.
And reinforcing ribs are also arranged in the upper-layer vibrating screen, are perpendicular to the metal strand wires and are fixedly combined with the metal strand wires.
The first screen is a metal screen, and the second screen is a plastic screen.
The angle formed by the mesh sieve plate and the horizontal plane is 3-7 degrees, a feed inlet is arranged at the contact part of one end of the mesh sieve plate and the shell, a waste discharge port is arranged at the contact part of the other end of the mesh sieve plate and the shell, the position of the feed inlet is higher than the waste discharge port,
the shape and the size of the mesh holes in the upper layer vibrating screen are the same as those of the mesh holes in the mesh screen plate.
The angle that lower floor's vibration screen cloth and horizontal plane become is 2 ~ 6, is provided with the discharge gate at the end that lower floor's vibration screen cloth and horizontal plane distance are little.
The upper layer of vibrating screen and the lower layer of vibrating screen are arranged, so that the screening efficiency can be improved; each mesh in the upper vibrating screen is composed of two adjacent but unconnected wavy metal strands, when biomass particles are clamped at the mesh, the mesh can be opened, the area is increased, the material falls down, the purpose of self-cleaning the screen is achieved, and the defect that time and labor are consumed for manually cleaning the meshes is overcome; the sieve pores in the two layers of the screens in the lower layer of the vibrating screen are distributed in a mutually staggered mode, so that the screening efficiency can be improved.
In some optional embodiments of the present application, the gas-powder separation device comprises: a biomass particle inlet, a gas powder outlet and a biomass particle recovery port;
the biomass particle inlet is communicated with a biomass discharge port of the screening device;
the gas powder discharge port is provided with a gas powder discharge pipe, and the outlet end part of the gas powder discharge pipe is provided with a particle filter screen and a conical guide plate;
the biomass particle recovery port is provided with a biomass particle recovery barrel, a grid filter layer is arranged in the biomass particle recovery barrel, a vortex type guide plate is arranged on the grid filter layer, a gas-powder separation channel, a gas discharge port and a biomass particle return port are arranged in the vortex type guide plate, a dome-shaped filter cloth is arranged on the vortex type guide plate, and an exhaust hood is arranged above the dome-shaped filter cloth;
the conical top of the conical guide plate is inserted into the grid filter layer, and a gas-powder distribution channel is arranged between the conical guide plate and the grid filter layer.
The gas powder discharge port is provided with a gas powder discharge pipe, the outlet end part of the gas powder discharge pipe is provided with a particle filter screen and a conical guide plate, the biomass particle recovery port is provided with a biomass particle recovery cylinder, a grid filter layer is arranged in the biomass particle recovery cylinder, the grid filter layer is provided with a vortex type guide plate, a gas powder separation channel is manufactured in the vortex type guide plate, a gas discharge port and a biomass particle return port, the vortex type guide plate is provided with dome-shaped filter cloth, an exhaust hood is arranged above the dome-shaped filter cloth, the conical top of the conical guide plate is inserted into the grid filter layer, and a gas powder distribution channel is arranged between the conical guide plate and the grid filter layer.
After various biomass particle raw materials are sent into the stirring cylinder, the space in the stirring cylinder is reduced, air and a small amount of biomass particles carried with the air in the stirring cylinder enter the air powder discharge pipe through the feeding hole of the stirring cylinder, the discharge hole of the feeding auger and the air powder discharge hole, the biomass particles are filtered for the first time through the particle filter screen, the filtered biomass particles directly fall back to the feeding auger through the air powder discharge pipe, but a part of the biomass particles enter the grid filter layer along with the air, then are filtered for the second time through the vortex type guide plate and the dome-shaped filter cloth, then the air is discharged from the exhaust hood, the filtered biomass particles (the biomass particles are slightly sticky) are mutually accumulated into particles, the weight of the biomass particles accumulated into the particles is more than that of the air, the biomass particles can freely settle down and fall into the biomass particle recovery cylinder through the air powder diversion channel, then the biomass particles are recovered from the biomass particle recovery port to a material conveying auger, and the gas-powder separation once cycle is finished.
Above-mentioned embodiment gas-powder separator can separate living beings granule and air dust, recycles the living beings granule that separates out simultaneously again, saves raw materials, and reduce cost can purify operational environment again, reduces pollution, has very showing positive effect. The mesh filter layer is a stainless steel mesh filter screen which is not rusty and has long service life. 1-3 layers of dome-shaped filter cloth are arranged on the vortex type guide plate, and the multilayer filtering effect is good.
In some optional embodiments of the present application, the screening system further comprises: a spraying device;
the spraying device is arranged above the screening device and is used for spraying in the screening process of the screening device.
In some optional embodiments of the present application, the feeding device is a screw feeder, a belt feeder, or a pipe belt machine.
In one embodiment of the present application, as shown in fig. 2, there is provided a screening system for a coal fired unit coupled biomass power generation system, the screening system may include:
the iron removal device is used for removing iron impurities in the biomass particles; the deironing device includes: magnetic pole core, winding and heat conducting plate; n heat conducting plates are arranged in parallel, wherein N is an integer greater than 2; the magnetic pole core is columnar and penetrates through N heat-conducting plates, the axial direction of the magnetic pole core is perpendicular to the heat-conducting plates, the N heat-conducting plates divide the magnetic pole core into N-1 sections of winding areas, and the winding is sleeved on the N-1 sections of winding areas. The deironing device still includes: the radiating fins are fixedly connected with the N heat conducting plates;
the screening device is communicated with the biomass particle outlet of the iron removal device and is used for removing large-particle non-metallic impurities in the biomass particles; the screening device comprises: the screen plate, the upper vibrating screen and the lower vibrating screen are sequentially arranged from top to bottom; the mesh sieve plate is obliquely arranged in the shell; the upper layer vibrating screen is arranged in parallel with the mesh sieve plate; the lower layer vibrating screen is obliquely arranged in the shell. The upper layer vibrating screen is formed by combining metal strips, the metal strips are wavy, two adjacent metal strips are symmetrically arranged, and the wavy shape is bent to form a screen hole in the upper layer vibrating screen; the lower vibrating screen is composed of a first screen and a second screen which are overlapped, and screen holes in the first screen and screen holes in the second screen are distributed in a mutually staggered mode;
the gas-powder separation device is communicated with an outlet of the biomass particles of the screening device and is used for removing dust in the biomass particles; the gas-powder separation device comprises: a biomass particle inlet, a gas powder outlet and a biomass particle recovery port; the biomass particle inlet is communicated with a biomass discharge port of the screening device; the gas powder discharge port is provided with a gas powder discharge pipe, and the outlet end part of the gas powder discharge pipe is provided with a particle filter screen and a conical guide plate; the biomass particle recovery port is provided with a biomass particle recovery barrel, a grid filter layer is arranged in the biomass particle recovery barrel, a vortex type guide plate is arranged on the grid filter layer, a gas-powder separation channel, a gas discharge port and a biomass particle return port are arranged in the vortex type guide plate, a dome-shaped filter cloth is arranged on the vortex type guide plate, and an exhaust hood is arranged above the dome-shaped filter cloth; the conical top of the conical guide plate is inserted into the grid filter layer, and a gas-powder distribution channel is arranged between the conical guide plate and the grid filter layer;
the feeding device is arranged at the bottom of the gas-powder separation device and is used for conveying the screened biomass particles;
and the spraying device is arranged above the screening device and is used for spraying in the screening process of the screening device.
According to the screening system, the iron impurities in the biomass particles are removed by the iron removing device, the large-particle nonmetal impurities in the biomass particles are removed by the screening device, the dust in the biomass particles is removed by the gas-powder separating device, the screened biomass particles are conveyed by the feeding device, the impurities and the dust in the biomass particles are removed, the biomass can be more sufficiently combusted, and the combustion efficiency of the biomass particles is improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (10)

1. A screening system for a coal fired unit coupled biomass power generation system, comprising:
the iron removal device is used for removing iron impurities in the biomass particles;
the screening device is communicated with the biomass particle outlet of the iron removal device and is used for removing large-particle non-metallic impurities in the biomass particles;
the gas-powder separation device is communicated with the biomass particle outlet of the screening device and is used for removing dust in the biomass particles;
and the feeding device is arranged at the bottom of the gas-powder separation device and is used for conveying the screened biomass particles.
2. A screening system according to claim 1, wherein said iron removal means comprises: magnetic pole core, winding and heat conducting plate
The number of the heat conduction plates is N, the N heat conduction plates are arranged in parallel, and N is an integer larger than 2;
the magnetic pole core is columnar and penetrates through the N heat-conducting plates, the axial direction of the magnetic pole core is perpendicular to the heat-conducting plates, the N heat-conducting plates divide the magnetic pole core into N-1 sections of winding areas, and the winding is sleeved on the N-1 sections of winding areas.
3. A screening system according to claim 2, wherein the material of the windings is a strip of alumina and the material of the thermally conductive plate is aluminium.
4. A screening system according to claim 2, wherein said iron removal means further comprises:
and the radiating fins are fixedly connected with the N heat conducting plates.
5. A screening system according to claim 1, wherein the screening device is a roller screen or a vibrating screen.
6. A screening system according to claim 1, wherein the screening device includes: the screen plate, the upper vibrating screen and the lower vibrating screen are sequentially arranged from top to bottom;
the mesh sieve plate is obliquely arranged in the shell;
the upper layer vibrating screen is arranged in parallel with the mesh screen plate;
the lower layer vibrating screen is obliquely arranged in the shell.
7. A screening system according to claim 6,
the upper layer vibrating screen is formed by combining metal strips, the metal strips are wavy, two adjacent metal strips are symmetrically arranged, and the wavy shape is bent to form a screen hole in the upper layer vibrating screen;
the lower-layer vibrating screen is composed of a first screen and a second screen which are overlapped, and screen holes in the first screen and screen holes in the second screen are distributed in a mutually staggered mode.
8. A screening system according to claim 1, wherein said gas-powder separation device comprises: a biomass particle inlet, a gas powder outlet and a biomass particle recovery port;
the biomass particle inlet is communicated with a biomass discharge port of the screening device;
the gas powder discharge port is provided with a gas powder discharge pipe, and the outlet end part of the gas powder discharge pipe is provided with a particle filter screen and a conical guide plate;
the biomass particle recovery port is provided with a biomass particle recovery barrel, a grid filter layer is arranged in the biomass particle recovery barrel, a vortex type guide plate is arranged on the grid filter layer, a gas-powder separation channel, a gas discharge port and a biomass particle return port are arranged in the vortex type guide plate, a dome-shaped filter cloth is arranged on the vortex type guide plate, and an exhaust hood is arranged above the dome-shaped filter cloth;
the conical top of the conical guide plate is inserted into the grid filtering layer, and a gas-powder distribution channel is arranged between the conical guide plate and the grid filtering layer.
9. A screening system according to any one of claims 1 to 8, further comprising: a spraying device;
the spraying device is arranged above the screening device and is used for spraying in the screening process of the screening device.
10. A screening system according to any one of claims 1 to 8, wherein the feeding means is a screw feeder, a belt feeder or a pipe belt machine.
CN202110640772.1A 2021-06-09 2021-06-09 Screening system for biomass power generation system coupled with coal burner unit Pending CN113369016A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110640772.1A CN113369016A (en) 2021-06-09 2021-06-09 Screening system for biomass power generation system coupled with coal burner unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110640772.1A CN113369016A (en) 2021-06-09 2021-06-09 Screening system for biomass power generation system coupled with coal burner unit

Publications (1)

Publication Number Publication Date
CN113369016A true CN113369016A (en) 2021-09-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110640772.1A Pending CN113369016A (en) 2021-06-09 2021-06-09 Screening system for biomass power generation system coupled with coal burner unit

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115193705A (en) * 2022-09-16 2022-10-18 兴化市热华能源有限公司 Biomass screening and feeding device for biomass circulating fluidized bed boiler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115193705A (en) * 2022-09-16 2022-10-18 兴化市热华能源有限公司 Biomass screening and feeding device for biomass circulating fluidized bed boiler

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