CN-121993798-A - Fan retired blade disposal device and method based on low-temperature catalytic oxidation

CN121993798ACN 121993798 ACN121993798 ACN 121993798ACN-121993798-A

Abstract

The application relates to the technical field of thermal treatment of low-calorific-value solid wastes, in particular to a fan retired blade treatment device and a fan retired blade treatment method based on low-temperature catalytic oxidation, wherein the treatment device comprises an oxidation furnace, a heating rod and a catalytic unit, a material chamber and an air storage chamber which are communicated are formed in the oxidation furnace, the material chamber is positioned above the air storage chamber, the material chamber is communicated with a smoke exhaust pipe, and the air storage chamber is communicated with an air inlet pipe; the catalytic unit is arranged around the heating rod, and the catalytic unit is heated by the heating rod to gasify and diffuse the catalyst in the material chamber. The device can improve the catalyst action efficiency, reduce the resin oxidation activation energy, accelerate the smoldering reaction rate, optimize the ventilation and heat preservation performance of the furnace body, improve the oxygen utilization rate, reduce the unburned carbon residue rate, realize the accurate dynamic regulation and control of the reaction process, maintain the stable smoldering state and shorten the disposal period.

Inventors

CHENG MINGJIE
LIU LEI
LI NINGZHI
ZHU JINGXUAN
CHEN LIANG
HU PENG
FENG JIANGZHE
ZHANG HAOCHEN
MENG ZIYUE
WANG DONG
LIU SHIYI
YUAN YIZHEN

Assignees

龙源(北京)新能源工程技术有限公司
龙源(西安)新能源工程技术有限公司

Dates

Publication Date: 20260508
Application Date: 20260116

Claims (10)

1. Fan retired blade treatment device based on low temperature catalytic oxidation, its characterized in that includes: The oxidation furnace is internally provided with a material chamber and an air storage chamber which are communicated, the material chamber is positioned above the air storage chamber, the material chamber is communicated with the smoke exhaust pipe, and the air storage chamber is communicated with the air inlet pipe; the heating rod is arranged in the material chamber and is used for heating materials; the catalytic unit is arranged around the heating rod, and the catalytic unit is heated by the heating rod to gasify and diffuse the catalyst inside the heating rod into the material chamber.
2. The fan retired blade disposal device based on low-temperature catalytic oxidation according to claim 1, wherein the catalytic unit comprises a shell and a catalyst arranged in the shell, micropores are formed in the shell, and the catalyst comprises potassium nitrate, sodium chloride and potassium chloride.
3. The fan retired blade disposal device based on low temperature catalytic oxidation according to claim 2, wherein the molar ratio of potassium nitrate to sodium chloride to potassium chloride is 6:2:2.
4. The fan retired blade disposal device based on low-temperature catalytic oxidation according to claim 1, wherein a sieve plate is arranged in the oxidation furnace, the sieve plate separates the material chamber from the air storage chamber, and the heating rod and the catalytic unit are installed on the sieve plate.
5. The fan retired blade disposal device based on low-temperature catalytic oxidation according to any one of claims 1-4, wherein the oxidation furnace comprises a basic furnace body and foam metal sections, a plurality of foam metal sections are embedded on the basic furnace body at intervals along the height direction of the basic furnace body, and a plurality of pores are formed on each foam metal section.
6. The fan retired blade disposal device based on low temperature catalytic oxidation according to claim 5, wherein the porosity of the metal foam section gradually decreases from bottom to top along the height direction of the base furnace body.
7. The fan retired blade disposal device based on low-temperature catalytic oxidation according to claim 5, wherein the basic furnace body is of annular steel structure, the foam metal sections are annular foam metal composite bodies, and the basic furnace body and the foam metal sections are alternately connected at intervals in the height direction.
8. The low temperature catalytic oxidation based fan retired blade disposal device of claim 5, further comprising: The temperature sensors are distributed on the inner wall of the oxidation furnace along the height direction; The wind speed sensor is arranged in the smoke exhaust pipe 2; An oxygen concentration sensor is provided in the smoke exhaust pipe 2.
9. The fan retired blade disposal device based on low-temperature catalytic oxidation according to claim 1, further comprising a storage bin and an ash separation bin, wherein a stirrer is arranged in the storage bin, and a basic furnace body is respectively arranged between the storage bin and a feed inlet of the oxidation furnace and between the ash separation bin and a slag discharge port of the oxidation furnace.
10. A fan retired blade disposal method, characterized in that the fan retired blade disposal device based on low temperature catalytic oxidation according to any one of claims 1-9 is used, the method comprising: premixing blade crushed aggregates and quartz stone, and filling the premixed blade crushed aggregates and quartz stone into a material chamber of an oxidation furnace; heating the heating rod to a first preset temperature and preserving heat for a preset time, and heating, gasifying and penetrating the catalyst into the material micropores in the material chamber; The heating rod triggers the ignition of the material; after the average temperature of the material reaches a second preset temperature, air is introduced into an air storage chamber of the oxidation furnace, and self-sustaining smoldering reaction of the material is initiated; The smoldering wave is spread upwards along with the airflow, and the micro negative pressure in the oxidation furnace drives air outside the oxidation furnace to permeate into the oxidation furnace through the side wall.

Description

Fan retired blade disposal device and method based on low-temperature catalytic oxidation Technical Field The application relates to the technical field of thermal treatment of low-calorific-value solid waste, in particular to a fan retired blade treatment device and method based on low-temperature catalytic oxidation. Background Wind power generation is one of the fastest renewable energy sources in China, and has become a core support industry for achieving the 'double carbon' target. However, the standard service life of wind turbine blades is only 20-25 years, the current industry has entered a large-scale retirement period, and the trend of updating with big generations is presented, and the disposal pressure of retired blades is rapidly highlighted. How to realize the efficient, low-consumption and environment-friendly disposal of the scrapped blades has become a great technical problem in the fields of crossing the wind power industry and solid waste disposal. The main components of the scrapped blade are made of resin-glass fiber composite materials (containing 30% of resin and 60% of glass fibers), and the characteristics of the components lead to two major disposal bottlenecks, namely extremely low heat value (less than 10MJ/kg, only 1/3 of fire coal), easy melting and coking of a large amount of nonflammable glass fibers at high temperature and serious blockage of the combustion process, and obvious defects in the traditional disposal technology, wherein the recycling degree of mechanical processing and chemical dissolution technology is low, a large amount of auxiliary fuel is required to be input for maintaining high temperature in the traditional thermal disposal technology such as pyrolysis/incineration, the energy consumption is too high, the net energy output is always negative, the economic feasibility is poor, the traditional smoldering device faces the problems of high unburned carbon residue rate, up to 20% -30%, poor combustion stability, long disposal period and the like, and the large-scale disposal requirement is difficult to meet. The smoldering combustion technology is used as a low-temperature oxidation (200-500 ℃) self-maintenance combustion technology of organic components, continuous reaction can be realized only by initial ignition energy, and the low-temperature characteristic can synchronously avoid high-temperature maintenance energy consumption and glass fiber melting coking risk, so that the method is an ideal technical direction for disposing blade composite materials. However, the existing smoldering device has the disadvantages of slower smoldering reaction rate, longer single-furnace waste disposal period and more unburned carbon residues, and restricts the application effect of the device in retired blade disposal. Therefore, the invention provides a fan retired blade disposal device and a disposal method based on low-temperature catalytic oxidation, and aims to solve the technical pain point. Disclosure of Invention The application provides a fan retired blade disposal device and method based on low-temperature catalytic oxidation, which are used for solving the problems of slower smoldering reaction rate, longer single-furnace waste disposal period and more unburned carbon residues of a smoldering device in the prior art. In one aspect, the application provides a fan retired blade disposal device based on low-temperature catalytic oxidation, which is characterized by comprising: The oxidation furnace is internally provided with a material chamber and an air storage chamber which are communicated, the material chamber is positioned above the air storage chamber, the material chamber is communicated with the smoke exhaust pipe, and the air storage chamber is communicated with the air inlet pipe; the heating rod is arranged in the material chamber and is used for heating the material; the catalytic unit is arranged around the heating rod, and the catalytic unit is heated by the heating rod to gasify and diffuse the catalyst inside the catalytic unit into the material chamber. In one possible design, the catalytic unit includes a housing and a catalyst disposed in the housing, the housing having micropores, the catalyst including potassium nitrate, sodium chloride and potassium chloride. In one possible design, the molar ratio of potassium nitrate to sodium chloride to potassium chloride is 6:2:2. In one possible design, a sieve plate is arranged in the oxidation furnace, the sieve plate separates the material chamber from the air storage chamber, and the heating rod and the catalytic unit are arranged on the sieve plate. In one possible design, the oxidizing furnace comprises a base furnace body and foam metal sections, wherein the foam metal sections are embedded on the base furnace body at intervals along the height direction of the base furnace body, and a plurality of holes are respectively formed in each foam metal section. In one possible design, the porosity o