CN-122012145-A - Material feeding control system and method of biomass gasification furnace

CN122012145ACN 122012145 ACN122012145 ACN 122012145ACN-122012145-A

Abstract

The invention relates to the technical field of biomass gasification, and provides a feeding control system and a feeding control method of a biomass gasification furnace, wherein a blanking accelerating mechanism deviating from a blanking channel is arranged in a storage bin, a vortex flow field is formed when the blanking accelerating mechanism rotates, a certain pressure difference is formed between a pressurizing pipeline connected with the top of the storage bin and a pressurizing pipeline connected with a discharging pipeline in a matching way, the material can fall into the fast pipeline of the spiral feeder under the action of the flow field and the gravity of the material in the storage bin, so that the material is conveyed to the discharge pipeline through the spiral feeder, stable biomass material is conveyed to the gasification furnace under the pressure action of the pressure pipeline, and the stability of the reaction in the biomass gasification furnace is improved, so that a gas product meeting the requirements is obtained.

Inventors

HU WEIBO
YANG JUN
Pu Yongtao
DU HUITONG
ZHAO YUNJIE
MAO QINGYANG
WANG ZHEN
LU BAOLIN

Assignees

北京瑞德克气力输送技术股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260318

Claims (11)

1. A feed control system for a biomass gasifier, comprising: The automatic feeding device comprises a storage bin, wherein a blanking control valve for controlling a buffer bin to blank is arranged at the top of the storage bin, a blanking accelerating mechanism is arranged in the storage bin and comprises a first driving motor, a stirring shaft and a spiral blade, the stirring shaft is in dynamic sealing rotation connection with the top of the storage bin and is driven by the first driving motor, a preset included angle is formed between the central line of the stirring shaft and the central line of the storage bin, so that an inclined vortex flow field is formed when the spiral blade rotates; The spiral feeding mechanism comprises a second driving motor, a feeding pipeline and a discharging pipeline, the feeding pipeline is communicated with the lower end of the storage bin, and the discharging pipeline is used for conveying biomass materials to the gasification furnace; the pressurizing assembly comprises a first pressurizing pipeline and a second pressurizing pipeline, the first pressurizing pipeline is communicated with the discharging pipeline, a first air pressure control valve is arranged on the first pressurizing pipeline, the second pressurizing pipeline is communicated with the top of the storage bin, and a second air pressure control valve is arranged on the second pressurizing pipeline; The control unit is electrically connected with the first driving motor, the second driving motor, the first air pressure control valve, the second air pressure control valve and the blanking control valve respectively, and is used for controlling the difference value between the pressure of the second air pressure control valve and the pressure of the first air pressure control valve to be within a preset pressure difference value range and controlling the first driving motor and the second driving motor to be started so that biomass materials are evenly output from the discharging pipeline.
2. The feed control system of a biomass gasification furnace according to claim 1, wherein the preset pressure difference is 0.1mpa to 0.2mpa.
3. The biomass gasification furnace feeding control system according to claim 1, wherein one end of the stirring shaft, which is far away from the first driving motor, is just intersected with the central line of the storage bin, and the preset included angle is 20-35 degrees.
4. The feed control system of a biomass gasifier according to claim 3, wherein the bottom of the storage bin is of a reverse taper structure, and one end of the stirring shaft, which is far away from the first driving motor, extends to a center line of the reverse taper structure.
5. The feed control system of a biomass gasification furnace according to any one of claims 1 to 4, wherein an outer diameter of said helical blades gradually increases from an end closer to said first drive motor to an end farther from said first drive motor.
6. The biomass gasification furnace feed control system according to claim 4, further comprising a pulse air inlet pipeline, wherein the pulse air inlet pipeline is used for conveying pulse air flow into the storage bin, the air pressure of the pulse air flow is 0.6-0.7 MPa, and the air injection frequency is 10-15 times per minute.
7. The feed control system of a biomass gasification furnace according to claim 1, wherein a first pressure detection component is arranged in said storage bin for detecting the pressure in said storage bin; an exhaust port is arranged on the side edge of the top of the storage bin, an exhaust control valve is arranged at the exhaust port, and the exhaust control valve is used for controlling the flow of exhaust; The control unit is respectively and electrically connected with the first pressure detection component and the exhaust control valve and is used for controlling the exhaust control valve to be opened and controlling the speed of the first driving motor to be regulated down when the pressure in the storage bin exceeds the upper limit of the pressure threshold value, or controlling the exhaust control valve to be closed and controlling the speed of the first driving motor to be regulated up when the pressure in the storage bin is smaller than the lower limit of the pressure threshold value.
8. The biomass gasification furnace feed control system according to claim 7, wherein the pressure control range of the first air pressure control valve is 0.5 to 0.6mpa, and the pressure control range of the second air pressure control valve is 0.6 to 0.7mpa.
9. The biomass gasification furnace feeding control system according to claim 7, wherein an air inlet of the gasification furnace is connected with the discharging pipeline through a pipeline, and a second pressure detection component is arranged in the biomass gasification furnace and used for detecting the pressure in the gasification furnace in real time; the control unit is electrically connected with the second pressure detection component and is used for adjusting the rotating speed of the first driving motor and the pressure of the first air pressure control valve according to the pressure in the gasification furnace, so that the difference value between the pressure in the gasification furnace and the pressure of the first air pressure control valve is within a preset range.
10. A feed control method of a biomass gasification furnace, characterized by comprising, based on the feed control system according to any one of claims 1 to 9: S100, controlling the blanking control valve to be opened; S200, controlling the first air pressure control valve and the second air pressure control valve to be opened, wherein the difference value between the pressure of the second air pressure control valve and the pressure of the first air pressure control valve is within a preset pressure difference value range; s300, controlling the first driving motor to start and controlling the second driving motor to start.
11. The method of controlling the feed of a biomass gasification furnace according to claim 10, further comprising, after step S300: S310, when the pressure in the storage bin exceeds the upper limit of the pressure threshold, controlling an exhaust control valve to be opened and controlling the speed of the first driving motor to be reduced; And S320, when the pressure in the storage bin is smaller than the lower limit of the pressure threshold, controlling the exhaust control valve to be closed and controlling the speed of the first driving motor to be increased.

Description

Material feeding control system and method of biomass gasification furnace Technical Field The invention relates to the technical field of biomass gasification, in particular to a feed control system and a method of a biomass gasification furnace. Background Biomass gasification refers to a process of converting biomass into combustible gas fuel, and various biomass resources such as wood, straw, crop residues, municipal refuse and the like can be converted into biomass gas (comprising carbon monoxide, hydrogen, methane and the like) through biomass gasification technology, so that the biomass gasification process is further used in the fields of power generation, heating, industrial production and the like. Biomass gasification generally adopts a thermochemical reaction process under high temperature condition to decompose biomass raw materials into a series of gas and liquid products, wherein the main reaction modes are carbonization, gas phase pyrolysis, partial oxidation, water gas transfer and other reactions, and in the biomass gasification process, parameters such as reaction temperature, pressure, gas flow rate and the like need to be controlled so as to achieve the optimal conversion rate and gas production effect. The efficiency that current biomass gasification stove carried the gasifier in is improved through the pressurization mode, but also can increase the pressure in the feed bin like this, to the biomass material that density is little, the quality is light, can have the problem of blanking difficulty in the feed bin, can influence the feed homogeneity on the contrary, and then influences the stability of biomass gasification reaction. Disclosure of Invention The invention aims to provide a feeding control system and a feeding control method of a biomass gasification furnace, which are used for solving the technical problem that the reaction is influenced when the material conveying efficiency is improved in a pressurizing mode in the existing biomass gasification reaction system. In a first aspect, the present invention provides a feed control system for a biomass gasifier, comprising: The automatic feeding device comprises a storage bin, wherein a blanking control valve for controlling a buffer bin to blank is arranged at the top of the storage bin, a blanking accelerating mechanism is arranged in the storage bin and comprises a first driving motor, a stirring shaft and a spiral blade, the stirring shaft is in dynamic sealing rotation connection with the top of the storage bin and is driven by the first driving motor, a preset included angle is formed between the central line of the stirring shaft and the central line of the storage bin, so that an inclined vortex flow field is formed when the spiral blade rotates; The spiral feeding mechanism comprises a second driving motor, a feeding pipeline and a discharging pipeline, the feeding pipeline is communicated with the lower end of the storage bin, and the discharging pipeline is used for conveying biomass materials to the gasification furnace; the pressurizing assembly comprises a first pressurizing pipeline and a second pressurizing pipeline, the first pressurizing pipeline is communicated with the discharging pipeline, a first air pressure control valve is arranged on the first pressurizing pipeline, the second pressurizing pipeline is communicated with the top of the storage bin, and a second air pressure control valve is arranged on the second pressurizing pipeline; The control unit is electrically connected with the first driving motor, the second driving motor, the first air pressure control valve, the second air pressure control valve and the blanking control valve respectively, and is used for controlling the difference value between the pressure of the second air pressure control valve and the pressure of the first air pressure control valve to be within a preset pressure difference value range and controlling the first driving motor and the second driving motor to be started so that biomass materials are evenly output from the discharging pipeline. Optionally, the preset pressure difference is 0.1mpa to 0.2mpa. Optionally, one end, far away from the first driving motor, of the stirring shaft is just intersected with the central line of the storage bin, and the preset included angle is 20-35 degrees. Optionally, the bottom of storage silo is the back taper structure, the (mixing) shaft is kept away from first driving motor's one end extends to the central line of back taper structure. Optionally, the outer diameter of the helical blade gradually increases from an end close to the first driving motor to an end far from the first driving motor. Optionally, the feeding control system of the biomass gasification furnace further comprises a pulse air inlet pipeline, wherein the pulse air inlet pipeline is positioned at the inverted cone structure position of the storage bin and is used for conveying pulse air flow into the storage bin