CN-121988588-A - Fan blade pyrolysis recovery device and system based on groove type molten salt heat storage

CN121988588ACN 121988588 ACN121988588 ACN 121988588ACN-121988588-A

Abstract

The invention discloses a fan blade pyrolysis recovery device and system based on slot type molten salt heat storage, wherein the device comprises a pretreatment system, a horizontal type pyrolysis furnace, a molten salt heat storage and supply system and a material conveying and collecting system, a discharge end of the pretreatment system is connected with a feed end of the horizontal type pyrolysis furnace through the material conveying system and is used for crushing, impurity removal and sorting of retired fan blades, the molten salt heat storage and supply system comprises a slot type heat collector, a high-temperature molten salt storage tank and a low-temperature molten salt storage tank, an outlet of the slot type heat collector is communicated with an inlet of the high-temperature molten salt storage tank, an interlayer is arranged in a shell of the horizontal type pyrolysis furnace, a salt distribution ring and a heating pipe are arranged in the interlayer, an inlet of the salt distribution ring is connected with an outlet of the high-temperature molten salt storage tank, an outlet of the salt distribution ring is connected with an inlet of the low-temperature molten salt storage tank, and the outlet of the low-temperature molten salt storage tank is connected with the inlet of the slot type heat collector in a return manner so as to realize molten salt circulation, solve the unstable heat supply and defects of the traditional process, blade characteristics are adapted, pyrolysis efficiency and product purity are improved, and green development of wind power industry is supported.

Inventors

CHAI BAOHUA
Dang Feilong
LU YAN
ZHOU ZHI
DUAN YANGLONG

Assignees

中国电建集团西北勘测设计研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20260128

Claims (10)

1. Fan blade pyrolysis recovery unit based on slot type fused salt heat accumulation, its characterized in that includes: the device comprises a pretreatment system, a horizontal pyrolysis furnace, a fused salt heat storage and supply system and a material conveying and collecting system; the discharging end of the pretreatment system is connected with the feeding end of the horizontal pyrolysis furnace through a material conveying system and is used for crushing, removing impurities and sorting out of service fan blades; The molten salt heat storage and supply system comprises a trough type heat collector, a high-temperature molten salt storage tank and a low-temperature molten salt storage tank, wherein an outlet of the trough type heat collector is communicated with an inlet of the high-temperature molten salt storage tank; An interlayer is arranged in the horizontal pyrolysis furnace shell, a salt distribution ring and a heating pipe are arranged in the interlayer, an inlet of the salt distribution ring is connected with an outlet of a high-temperature molten salt storage tank, an outlet of the salt distribution ring is connected with an inlet of the low-temperature molten salt storage tank, and an outlet of the low-temperature molten salt storage tank is connected with an inlet of a trough type heat collector in a return manner so as to realize molten salt circulation; and a pyrolysis gas outlet, a pyrolysis oil outlet and a fiber outlet of the horizontal pyrolysis furnace are respectively connected with all feeding ports in the material conveying and collecting system.
2. The fan blade pyrolysis recovery device based on slot type molten salt heat storage of claim 1, wherein the pretreatment system comprises: The device comprises a chopper, a roller crusher and an impurity removal and separation device which are connected in sequence, wherein the discharge end of the impurity removal and separation device forms the discharge end of a pretreatment system and is communicated with the feed end of a horizontal pyrolysis furnace through a material conveying and collecting system; A plurality of groups of cutting pieces are arranged in the chopper, and a material baffle plate is arranged at the feeding end.
3. The fan blade pyrolysis recovery device based on trough type molten salt heat storage of claim 2, wherein the roller crusher comprises: The feeding bin, a plurality of groups of roll shafts and a collecting hopper; The feeding bin is connected with the discharge end of the chopper and is used for receiving fan blade materials crushed by the cutting blades, and the bottom of the feeding bin is correspondingly arranged with a plurality of groups of roll shafts so as to secondarily crush the materials; The collecting hopper is arranged below the plurality of groups of roller shafts and is connected with the feeding end of the impurity removal and separation device, so that crushed materials are conveyed to the impurity removal and separation device through the collecting hopper, and then the crushed materials are communicated with the feeding end of the horizontal pyrolysis furnace through the material conveying and collecting system.
4. The fan blade pyrolysis recovery device based on trough type molten salt heat storage as claimed in claim 2, wherein a feeding end of the impurity removal and separation device is connected with a discharging end of a roller crusher to receive crushed fan blade materials; The top of the impurity removal and separation device is provided with an iron remover, the side face is provided with an air blowing port, the bottom is provided with a light material outlet; the iron remover is in linkage fit with the material conveying and collecting system so as to separate and guide out metal impurities; The composite material after impurity removal and separation is directionally conveyed to the feeding end of the horizontal pyrolysis furnace through the discharging end of the pretreatment system and the material conveying and collecting system.
5. The fan blade pyrolysis recovery device based on the trough type molten salt heat storage, which is disclosed in claim 1, is characterized in that a motor and a feeding device are fixedly assembled on one side of the horizontal pyrolysis furnace, the feeding device is a feeding end of the horizontal pyrolysis furnace and is connected with a material conveying and collecting system so as to receive composite materials led out by a pretreatment system; The inside coaxial conveying axle that sets up of horizontal pyrolysis oven, the power input of conveying axle with the output transmission of motor is connected, and the main part section of conveying axle is laid along the extension of furnace body axis for drive material along furnace body axis continuous motion, make the material and cloth the furnace body casing after salt ring and the heating pipe heating fully contact heat transfer so that pyrolysis reaction is stable going on.
6. The fan blade pyrolysis recovery device based on groove type molten salt heat storage as claimed in claim 1, wherein a first hot salt inlet, a pyrolysis gas outlet and a first cold salt outlet are sequentially formed in a penetrating manner in the axial direction of a furnace body at the top of the horizontal pyrolysis furnace, and a pyrolysis oil outlet and a fiber recovery port are correspondingly formed in the bottom of the horizontal pyrolysis furnace in a penetrating manner; The first hot salt inlet is communicated with the outlet of the high-temperature molten salt storage tank in a sealing way through a conveying pipeline, and the inner end of the furnace is connected with the inlet end of a salt distribution ring in the interlayer of the furnace body in a sealing way; The furnace inner end of the first cold salt outlet is in sealing connection with the outlet end of the salt distribution ring, and the furnace outer end of the first cold salt outlet is in sealing communication with the inlet of the low-temperature molten salt storage tank through a conveying pipeline; The pyrolysis gas outlet, the pyrolysis oil outlet and the fiber recovery port are respectively in one-to-one sealing butt joint with each feed inlet of the material conveying and collecting system through corresponding pipelines, so that the directional sealing and guiding-out of pyrolysis products are realized.
7. The fan blade pyrolysis recovery device based on groove type molten salt heat storage as claimed in claim 6, wherein a filtering device and an oil collecting bin are fixedly assembled in a bottom shell of the horizontal pyrolysis furnace through a bolt assembly; the filtering device is coaxially arranged right above the oil collecting bin, and the circumferential edge of the filtering device is bonded and sealed with the inner wall of the furnace body shell by adopting a sealing gasket for intercepting solid impurities in pyrolysis oil; The oil collecting bin is obliquely fixed in a welding mode, a diversion inclined plane is integrally formed at the bottom of the oil collecting bin, and an oil outlet is formed at the lowest end of the diversion inclined plane; The oil outlet is in sealing connection with the pyrolysis oil outlet through an internal flow passage, and is used for realizing directional converging of the filtered pyrolysis oil to the oil outlet along a diversion inclined plane, and then the pyrolysis oil is stably guided into the pyrolysis oil outlet through the internal flow passage and is hermetically guided out of the furnace body.
8. The fan blade pyrolysis recovery device based on slot type molten salt heat storage of claim 1, wherein the slot type heat collector comprises: Molten salt tank, heat collecting pipe, supporting device and control device; the heat collecting pipe is fixed in the cavity in the molten salt tank, the molten salt tank is of an arc-shaped light-gathering structure, and solar energy can be gathered to the outer surface of the heat collecting pipe, so that efficient heat exchange between molten salt flowing in the heat collecting pipe and solar energy gathered outside the heat collecting pipe is realized; The outlet end of the molten salt tank is the outlet of the tank type heat collector and is connected with the inlet of the high-temperature molten salt storage tank through a pipeline; The inlet end of the molten salt tank is connected with the outlet of the low-temperature molten salt storage tank through a pipeline to form a molten salt circulation loop; The supporting device comprises a base and a swing arm, the bottom of the swing arm is hinged with the base, and the top of the swing arm is connected with the bottom of the molten salt tank through a rotating shaft; The control device is electrically connected with the driving executing mechanism configured by the supporting device, and the driving executing mechanism can drive the swing arm to rotate around the hinge point, so that the molten salt tank is driven to rotate around the rotating shaft to adjust the dip angle, and the solar energy is automatically tracked.
9. The fan blade pyrolysis recovery device based on trough type molten salt heat storage of claim 1, wherein the material conveying and collecting system comprises: the material conveying and collecting system comprises a bidirectional belt conveyor, a metal collecting and compressing device and a product collecting unit; The feeding end of the bidirectional belt conveyor is connected with the discharging end of the pretreatment system, and the discharging end of the bidirectional belt conveyor is connected with the feeding end of the horizontal pyrolysis furnace and is used for stably conveying the crushed, impurity-removed and separated composite materials; The bidirectional belt conveyor is provided with a forward and reverse rotation driving motor, and the conveying direction is switched by the steering switching of the driving motor; the feeding end of the bidirectional belt conveyor receives metal impurities separated in the impurity removal and separation process in a reverse rotation state of the driving motor, and directionally conveys the metal impurities to a feeding port of the metal collecting and compressing device; The product collecting unit comprises a pyrolysis gas collecting tank, a pyrolysis oil storage tank and a fiber collecting bin, wherein the pyrolysis gas collecting tank, the pyrolysis oil storage tank and the fiber collecting bin are connected with a pyrolysis gas outlet, a pyrolysis oil outlet and a fiber recycling port of the horizontal pyrolysis furnace in one-to-one correspondence through pipelines respectively, and classification sealing collection of pyrolysis products is achieved.
10. Fan blade pyrolysis recovery system based on slot type fused salt heat accumulation, its characterized in that includes: The recycling apparatus, central control system, and safety guarantee system according to any one of claims 1 to 9; The central control system is electrically connected with the pretreatment system, the fused salt heat storage and supply system, the horizontal pyrolysis furnace and the material conveying and collecting system and is used for collecting parameters such as crushing granularity, fused salt temperature speed, furnace temperature speed, conveying direction, product collecting amount and the like and automatically regulating and controlling; The central control system is internally provided with a parameter threshold value and a feedback adjustment module, and when the parameter exceeds the threshold value, the feedback module automatically triggers an adjustment instruction to enable the system to return to a preset range, so that continuous and stable pyrolysis is ensured; The safety guarantee system comprises an emergency cooling unit, a pressure monitoring unit and a leakage alarm unit, wherein the cooling unit is communicated with the fused salt storage tank and the furnace body interlayer, and medium is introduced for cooling when the fused salt temperature is abnormal; the pressure monitoring unit is arranged on the furnace body and the product pipeline and is used for measuring pressure in real time; The leakage alarm unit is arranged at the sealing part of the pipeline, and triggers an audible and visual alarm and a linkage system to stop when leakage occurs; The system also comprises an auxiliary heat exchange module which is connected with the pyrolysis gas outlet, recovers waste heat and transmits the waste heat to a pretreatment material heating or low-temperature molten salt preheating link, so that energy cascade utilization is realized.

Description

Fan blade pyrolysis recovery device and system based on groove type molten salt heat storage Technical Field The invention belongs to the technical field of pyrolysis recovery of fan blades, and particularly relates to a pyrolysis recovery device and system of a fan blade based on trough-type molten salt heat storage. Background The global energy structure is accelerated to clean low-carbon transformation, wind power is used as mature renewable energy to realize rapid development, and the fan blade is used as a core component and is mostly made of composite materials such as glass fiber, and the wind power generator has the characteristics of large volume, difficult degradation, complex components and the like. At present, the main stream treatment mode of the retired fan blade is stacking storage, sanitary landfill and incineration, and the mode has a plurality of defects that the stacking and landfill occupy a large amount of land resources and are easy to cause long-term pollution to soil and underground water, and toxic gases such as dioxin can be generated during the incineration. However, the existing recycling recovery technology still has the defects that the traditional pyrolysis technology relies on fossil energy to supply heat, the carbon emission is high, the influence of energy supply stability is large, and meanwhile, the pretreatment and pyrolysis equipment adapting to the blade characteristics is lacking, so that the pyrolysis efficiency is low and the purity of the product is poor. Disclosure of Invention The invention aims to provide a fan blade pyrolysis recovery device and system based on trough-type molten salt heat storage, which are used for solving the technical defects that the traditional treatment mode depends on fossil energy to pollute the environment, and has high carbon emission and unstable heat supply. In order to achieve the above object, the present application provides the following technical solutions: The application provides a fan blade pyrolysis recovery device based on slot type molten salt heat storage, which comprises: the device comprises a pretreatment system, a horizontal pyrolysis furnace, a fused salt heat storage and supply system and a material conveying and collecting system; the discharging end of the pretreatment system is connected with the feeding end of the horizontal pyrolysis furnace through a material conveying system and is used for crushing, removing impurities and sorting out of service fan blades; The molten salt heat storage and supply system comprises a trough type heat collector, a high-temperature molten salt storage tank and a low-temperature molten salt storage tank, wherein an outlet of the trough type heat collector is communicated with an inlet of the high-temperature molten salt storage tank; An interlayer is arranged in the horizontal pyrolysis furnace shell, a salt distribution ring and a heating pipe are arranged in the interlayer, an inlet of the salt distribution ring is connected with an outlet of a high-temperature molten salt storage tank, an outlet of the salt distribution ring is connected with an inlet of the low-temperature molten salt storage tank, and an outlet of the low-temperature molten salt storage tank is connected with an inlet of a trough type heat collector in a return manner so as to realize molten salt circulation; and a pyrolysis gas outlet, a pyrolysis oil outlet and a fiber outlet of the horizontal pyrolysis furnace are respectively connected with all feeding ports in the material conveying and collecting system. In an alternative embodiment, the preprocessing system includes: The device comprises a chopper, a roller crusher and an impurity removal and separation device which are connected in sequence, wherein the discharge end of the impurity removal and separation device forms the discharge end of a pretreatment system and is communicated with the feed end of a horizontal pyrolysis furnace through a material conveying and collecting system; A plurality of groups of cutting pieces are arranged in the chopper, and a material baffle plate is arranged at the feeding end. In an alternative embodiment, the roller crusher comprises: The feeding bin, a plurality of groups of roll shafts and a collecting hopper; The feeding bin is connected with the discharge end of the chopper and is used for receiving fan blade materials crushed by the cutting blades, and the bottom of the feeding bin is correspondingly arranged with a plurality of groups of roll shafts so as to secondarily crush the materials; The collecting hopper is arranged below the plurality of groups of roller shafts and is connected with the feeding end of the impurity removal and separation device, so that crushed materials are conveyed to the impurity removal and separation device through the collecting hopper, and then the crushed materials are communicated with the feeding end of the horizontal pyrolysis furnace through the material conveying and coll