US-12624832-B2 - Hybrid feeding device for automatically adjusting co-firing amount of decaying garbage

US12624832B2US 12624832 B2US12624832 B2US 12624832B2US-12624832-B2

Abstract

A hybrid feeding device for automatically adjusting a co-firing amount of decaying garbage. The device comprises a mechanical grate furnace, a hybrid garbage conveying device, a raw garbage feeding device, a decaying garbage feeding device, a hybrid garbage crushing device, and a control center. The raw garbage feeding device, the decaying garbage feeding device, and the hybrid garbage conveying device are all connected to the control center. The decaying garbage feeding device is used for transporting decaying garbage to the raw garbage feeding device. The raw garbage feeding device is positioned between the decaying garbage feeding device and the hybrid garbage conveying device. The hybrid garbage crushing device is used for crushing garbage and inputting the garbage to the mechanical grate furnace. The mechanical grate furnace is internally provided with a plurality of temperature sensors, and the plurality of temperature sensors are connected to the control center.

Inventors

Yuting Tang
Yuxuan ZHANG
Xiaoqian Ma

Assignees

SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Dates

Publication Date: 20260512
Application Date: 20211011
Priority Date: 20210125

Claims (9)

1 . A hybrid feeding device for automatically adjusting a co-firing amount of decaying garbage, comprising a hybrid garbage conveying device positioned above a feed port of a mechanical grate furnace, the hybrid feeding device for automatically adjusting the co-firing amount of decaying garbage further comprises a raw garbage feeding device, a decaying garbage feeding device, a hybrid garbage crushing device and a control center; wherein the raw garbage feeding device, the decaying garbage feeding device, the hybrid garbage conveying device and the hybrid garbage crushing device are all connected to the control center; the decaying garbage feeding device is positioned above the hybrid garbage conveying device, and is used for conveying the decaying garbage to the hybrid garbage conveying device; the raw garbage feeding device is positioned between the decaying garbage feeding device and the hybrid garbage conveying device, and is used for placing the raw garbage on the hybrid garbage conveying device; the hybrid garbage crushing device is positioned at an end of the hybrid garbage conveying device and is used for chopping and uniformly mixing the decaying garbage and the raw garbage on the hybrid garbage conveying device, and the chopped and mixed garbage is input to the mechanical grate furnace; a plurality of temperature sensors are provided in the mechanical grate furnace, the plurality of temperature sensors are connected to the control center, and the plurality of temperature sensors collect working parameters of each part of the mechanical grate furnace and convert the working parameters into corresponding signals and transmit the corresponding signals back to the control center; wherein the control center transmits feedback signals to the raw garbage feeding device, the decaying garbage feeding device and the hybrid garbage conveying device, and adjusts an operating frequency of each device to realize the control and adjustment of a co-firing ratio.
2 . The hybrid feeding device for automatically adjusting the co-firing amount of decaying garbage according to claim 1 , the raw garbage feeding device comprises a raw garbage tank and a garbage grab positioned above the raw garbage tank; the garbage grab takes the raw garbage from the raw garbage tank and places the raw garbage directly on the hybrid garbage conveying device.
3 . The hybrid feeding device for automatically adjusting the co-firing amount of decaying garbage according to claim 1 , the decaying garbage feeding device comprises a first variable frequency motor, a first conveyor belt and a decaying garbage tank; the first conveyor belt is positioned below the decaying garbage tank, the decaying garbage falls from an end of the first conveyor belt and then covers on the raw garbage on the hybrid garbage conveying device, the first variable frequency motor is connected to the first conveyor belt, and the first variable frequency motor controls movement of the first conveyor belt according to a signal received from the control center.
4 . The hybrid feeding device for automatically adjusting the co-firing amount of decaying garbage according to claim 1 , the hybrid garbage conveying device comprises a second variable frequency motor and a second conveyor belt positioned below the garbage grab and the first conveyor belt; the second variable frequency motor is connected to the control center, and controls movement of the second conveyor belt according to a signal received from the control center; an end of the second conveyor belt is positioned above the hybrid garbage crushing device; on the second conveyor belt, the decaying garbage and the raw garbage are fed to the hybrid garbage crushing device via the second conveyor belt.
5 . The hybrid feeding device for automatically adjusting the co-firing amount of decaying garbage according to claim 4 , the hybrid garbage crushing device comprises several sets of rotating cutters and a third variable frequency motor controlling the rotating cutters, the several sets of rotating cutters is positioned at an end of the second conveyor belt; the third variable frequency motor controls the rotation speed of the several sets of rotating cutters according to the signal of the control center.
6 . The hybrid feeding device for automatically adjusting the co-firing amount of decaying garbage according to claim 1 , the several sets of rotating cutters comprises parallel rotating cutters and toothed rotating cutters.
7 . The hybrid feeding device for automatically adjusting the co-firing amount of decaying garbage according to claim 1 , the mechanical grate furnace comprises a slag discharge port, a grate, a front arch, a flue, a rear arch and a superheater, wherein the rear arch is positioned at a rear of a furnace chamber, and the front arch is respectively connected to the rear arch via the flue; the superheater is arranged in the flue, and the grate is connected to the slag discharge port.
8 . The hybrid feeding device for automatically adjusting the co-firing amount of decaying garbage according to claim 1 , the plurality of temperature sensors are arranged on the grate at the back of the mechanical grate furnace, on the flue at the back of the mechanical grate furnace, and in the superheater at the back of the mechanical grate furnace, respectively.
9 . The hybrid feeding device for automatically adjusting the co-firing amount of decaying garbage according to claim 1 , the control center comprises an AT89S51 single-chip microcomputer, wherein the AT89S51 single-chip microcomputer controls a rotation speed of a corresponding variable frequency motor according to temperature information collected by the temperature sensors arranged at each position.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is a 371 application of the international PCT application serial no. PCT/CN2021/122966, filed on Oct. 11, 2021, which claims the priority benefit of China application no. 202110096988.6, filed on Jan. 25, 2021. The entirety of each of the above-mentioned patent applications is hereby incorporated by reference herein and made a part of this specification. TECHNICAL FIELD The present invention relates to the technical field of solid waste incineration devices, in particular to a hybrid feeding device for automatically adjusting a co-firing amount of decaying garbage. RELATED ART As the capacity of many landfills will be exhausted, the landfills will successively be closed for renovation, and many cities will be in a “garbage-surrounding-city” dilemma. The reduction of decaying garbage has become an urgent problem in the development of municipal solid garbage landfill treatment. Energizing the combustible components of the decaying garbage is an ideal solution to this problem. That is, it is expected to become one of the technical routes for the popularization and application of large-scale industry in China to take advantage of the existing treatment capacity of raw garbage incinerators and make corresponding improvements to realize the reduction, harmless and resource reuse treatment of raw/decaying garbage. The source of raw garbage is complex, and its heat value is unstable, which is affected by the factor such as season, climate, and source and so on. After a long-term mineralization process, all kinds of components in garbage reside, accumulate, and transform after landfill, so the components and heat value of the decaying garbage are different from those of the raw garbage, and are affected by the year and mode of landfill. If a co-firing ratio of the raw garbage and the decaying garbage is set only according to the design conditions or operation experience of a raw garbage incinerator, it is easy to cause a mismatch between the co-firing ratio of the decaying garbage and the design conditions of the incinerator. Especially when the proportion of domestic garbage is too low, too high heat value will make the fuel burn out in advance, and the exposure of the grate will bring serious high-temperature corrosion to the furnace, which poses a great threat to apparatus safety. Further, if the fuel is mixed unevenly during the co-firing process, the temperature distribution in the furnace will deviate from the design conditions, which will adversely affect the incinerator efficiency. In conclusion, the unreasonable co-combustion proportion and mixing mode will threaten the safe operation of an incinerator and adversely affect the power generation efficiency of a garbage incineration power plant. Therefore, it is necessary to develop a device that can automatically adjust the mixing ratio of the raw garbage and the decaying garbage under the co-combustion condition. SUMMARY OF INVENTION Technical Problem Solution to the Problem Technical Solution An object of the present invention is to overcome the disadvantages and shortcomings of the prior art, and provide a hybrid feeding device for automatically adjusting a co-firing amount of decaying garbage to solve the problem of combustion instability which may occur due to an unreasonable setting of a feed ratio when the decaying garbage is co-fired in the grate of a garbage incinerator, and can rationally determine a blending ratio of the raw/decaying garbage and ensure the sufficient blending of the two fuels according to actual combustion conditions. While achieving safe and stable operation of an apparatus, the unit treatment capacity of the decaying garbage is increased as much as possible. The present invention is realized by at least one of the following technical solutions. A hybrid feeding device for automatically adjusting a co-firing amount of decaying garbage, comprising a hybrid garbage conveying device positioned above a feed port of a mechanical grate furnace, wherein the hybrid feeding device for automatically adjusting the co-firing amount of decaying garbage further comprises a raw garbage feeding device, a decaying garbage feeding device, a hybrid garbage crushing device and a control center; wherein the raw garbage feeding device, the decaying garbage feeding device, the hybrid garbage conveying device and the hybrid garbage crushing device are all connected to the control center; the decaying garbage feeding device is positioned above the hybrid garbage conveying device, and is used for conveying the decaying garbage to the hybrid garbage conveying device;the raw garbage feeding device is positioned between the decaying garbage feeding device and the hybrid garbage conveying device, and is used for placing the raw garbage on the hybrid garbage conveying device;the hybrid garbage crushing device is positioned at an end of the hybrid garbage conveying device and is used for chopping and unifor