Tunnel kiln car for pyrolyzing large-size fan blades

Abstract

The utility model discloses a tunnel kiln car for pyrolyzing large-size fan blades, which comprises a kiln car main body, a plurality of groups of steel clamping mechanisms are arranged on the kiln car main body, the kiln car main body comprises a single-layer steel frame, a double-layer composite heat-insulating layer is paved on the single-layer steel frame, a refractory slab is paved on the double-layer composite heat-insulating layer, and the refractory slab is arranged on the single-layer steel frame. According to the device, an adjusting screw rod is rotated by rotating a knob, the adjusting screw rod rotates to drive an adjusting block to move up and down, the adjusting block drives a clamping arm to move up and down, the clamping arm is clamped on the adjusting screw rod, the clamping arm is clamped on the adjusting screw rod, the clamping arm is clamped on the clamping arm, and the clamping arm is clamped on the clamping arm. Therefore, fan blades with different sizes can be clamped.

Description

Technical Field

[0001] This utility model relates to the technical field of tunnel kiln equipment, specifically to a tunnel kiln car for pyrolyzing large-size fan blades. Background Technology

[0002] With the rapid growth of global wind power installed capacity and the increasing number of retired wind turbine units, the number of retired wind turbine blades is surging year by year. The main materials of wind turbine blades are carbon fiber, glass fiber, and epoxy resin matrix. Currently, the mainstream blade disposal methods are still landfill or simple physical crushing. However, glass fiber / carbon fiber composites are difficult to degrade naturally, and landfill not only occupies a large amount of land resources but also poses environmental pollution risks. Furthermore, the economic value of the crushed materials and their low-value recycled materials is relatively low. For the valuable components, especially carbon fiber, achieving resource recycling has significant resource, environmental, and economic potential. Carbon fiber, as a high-performance material, has extremely high intrinsic value. Its recycling and reuse can achieve the three-in-one goals of economic value-added, environmental protection, and resource recycling, promoting the construction of a green circular utilization system for high-end materials. Through pyrolysis recycling technology, large-size carbon fibers can be separated from retired wind turbine blades and reused to manufacture high-performance composite materials and various types of commodities, with mechanical properties comparable to or even equivalent to virgin carbon fiber. This recycling method not only reduces the environmental pressure of waste but also reduces dependence on virgin carbon fiber, resulting in significant economic and social benefits.

[0003] In the field of pyrolysis recovery, traditional tunnel kiln cars face multiple technical bottlenecks due to design limitations: First, the size of the support platform is generally too small (length ≤ 0.8m). This is because traditional support platforms are mainly based on those used in traditional ceramic firing, employing very thick frames, insulation layers, solid refractory bricks, etc., resulting in a small proportion of usable space. After the size is increased, the original frame design cannot withstand higher thermal stress and mechanical loads, easily leading to deformation and cracking, structural strength imbalance, and inability to meet the fixing requirements of large-sized blades (≥ 1m); Second, the fixing brackets are mostly simple rigid structures, lacking adjustment functions, and are difficult to accommodate irregularly shaped blades with different curvatures and thicknesses under harsh working environments. The blades are at risk of falling off and structural deformation during pyrolysis, significantly increasing operation and maintenance costs. Third, the thermal conductivity of conventional refractory bricks or aluminosilicate fiber insulation layers is still relatively high, resulting in a high heat loss rate at the bottom of the kiln car. This not only reduces pyrolysis efficiency and fiber separation and recovery rate but also increases energy consumption costs. Fourth, the resin pyrolysis oil produced after pyrolysis contains various organic compounds such as phenol, isopropylphenol, and bisphenol A, but these are difficult to collect and utilize, causing environmental pollution, resource waste, and inconvenience for subsequent carbon fiber purification.

[0004] In recent years, although some enterprises have tried to increase the size of the kiln car or add an external insulation layer, they still cannot systematically solve the contradiction between the pyrolysis stability and energy efficiency optimization of large-sized blades. There is an urgent need for a new type of kiln car that integrates high load-bearing adaptability, efficient clamping and adjustment, efficient heat insulation and full product collection. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a tunnel kiln car for pyrolyzing large-size fan blades, so as to solve the problems of fixation stability, thermal efficiency and product recovery during the pyrolysis of large-size blades, and to provide a high-efficiency and energy-saving special kiln car.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A tunnel kiln car for pyrolyzing large-sized fan blades includes a kiln car body with several sets of steel clamping mechanisms. The kiln car body includes a single-layer steel frame with a double-layer composite heat insulation layer laid on it. A refractory board is laid on the double-layer composite heat insulation layer, and a resin pyrolysis oil collection mechanism is provided above the refractory board. A SiC ceramic membrane is laid on the resin pyrolysis oil collection mechanism, wherein the steel clamping mechanisms are installed on the surface of the SiC ceramic membrane.

[0008] Furthermore, the thickness of the double-layer composite insulation layer is 50-100 mm, and the thermal conductivity is <0.03 W / (m·K).

[0009] Furthermore, the resin pyrolysis oil collection mechanism includes a resin pyrolysis oil collection plate, the middle of which is inclined to both sides.

[0010] Furthermore, the middle part of the resin pyrolysis oil collecting plate is inclined to both sides at 5-10°.

[0011] Furthermore, each set of steel clamping mechanisms includes two steel clamping components symmetrically arranged on the surface of the SiC ceramic film. Each steel clamping component includes a steel clamping base, on which a telescopic rod is installed. A clamping arm is connected to the end of the telescopic rod, and an adjustment component for adjusting the height of the clamping arm is provided between the clamping arm and the telescopic rod.

[0012] Furthermore, the adjustment assembly includes an adjustment block and an adjustment screw. The adjustment block is installed at the end of the telescopic rod, and the clamping arm is installed on the inward end face of the adjustment block. The adjustment block has an internal thread that matches the size of the external thread of the adjustment screw. The adjustment screw is threadedly connected to the adjustment block, and a knob is installed on the top of the adjustment block.

[0013] Furthermore, the kiln car body is equipped with several wheels at its bottom.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1) The main body of the kiln car of this utility model includes a single-layer steel frame. A double-layer composite heat insulation layer is laid on the single-layer steel frame. The double-layer composite heat insulation layer is composed of graphene aerogel + aluminum silicate carbon fiber, with a thickness of 50-100mm, thermal conductivity <0.03 W / (m·K), fire resistance and non-combustibility, resistance to ultra-high temperature, and ultra-lightweight characteristics.

[0016] 2) The pyrolysis oil collection plate of this utility model is inclined to both sides at a 5-10° angle in the middle, which facilitates the collection of pyrolysis oil at the end and improves the pyrolysis oil recovery rate;

[0017] 3) This utility model uses a rotating knob to rotate the adjusting screw, which in turn moves the adjusting block up and down, and the adjusting block moves the clamping arm up and down, so as to clamp fan blades of different sizes.

[0018] 4) The main body of the kiln car of this utility model is made of steel frame with higher strength, composite heat insulation layer, lightweight fire refractory board, etc., which reduces weight while ensuring structural stability. After enlarging the size, it can withstand higher thermal stress and mechanical load, and is not easy to deform and crack. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the tunnel kiln car structure of this utility model.

[0020] In the diagram: 1. Single-layer steel frame; 2. Double-layer composite insulation layer; 3. Fire-resistant board; 4. Resin pyrolysis oil collection plate; 5. SiC ceramic membrane; 6. Steel clamping parts; 7. Steel clamping base; 8. Telescopic rod; 9. Clamping arm; 10. Adjusting block; 11. Adjusting screw; 12. Knob; 13. Wheel. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the scope described herein.

[0022] Please refer to Figure 1 A tunnel kiln car for pyrolyzing large-sized fan blades includes a kiln car body with several sets of steel clamping mechanisms for clamping the fan blades. The kiln car body includes a single-layer steel frame 1, a double-layer composite heat insulation layer 2 on the single-layer steel frame 1, a refractory plate 3 on the double-layer composite heat insulation layer 2, a resin pyrolysis oil collection mechanism above the refractory plate 3, and a SiC ceramic membrane 5 on the resin pyrolysis oil collection mechanism. The steel clamping mechanisms are installed on the surface of the SiC ceramic membrane 5.

[0023] The resin pyrolysis oil is collected in the resin pyrolysis oil collection mechanism through the SIC ceramic membrane 5. The SIC ceramic membrane 5 can filter substances >0.1μm at high temperature to separate the pyrolysis oil from the solid products.

[0024] The double-layer composite thermal insulation layer 2 is composed of graphene aerogel and aluminum silicate carbon fiber, with a thickness of 50-100mm and a thermal conductivity of <0.03 W / (m·K). It is fire-resistant, non-combustible, and resistant to ultra-high temperatures, while also being ultra-lightweight.

[0025] The resin pyrolysis oil collection mechanism includes a resin pyrolysis oil collection plate 4, which is inclined to both sides in the middle. Furthermore, the resin pyrolysis oil collection plate 4 is inclined to both sides at a 5-10° angle in the middle to facilitate pyrolysis oil collection at the end and improve the pyrolysis oil recovery rate.

[0026] Each set of steel clamping mechanisms includes two steel clamping parts 6 symmetrically arranged on the surface of the SIC ceramic film 5. Each steel clamping part 6 includes a steel clamping base 7, a telescopic rod 8 is installed on the steel clamping base 7, and a clamping arm 9 is connected to the end of the telescopic rod 8. An adjustment component for adjusting the height of the clamping arm 9 is provided between the clamping arm 9 and the telescopic rod 8.

[0027] The adjustment assembly includes an adjustment block 10 and an adjustment screw 11. The adjustment block 10 is installed at the end of the telescopic rod 8, and the clamping arm 9 is installed on the inward end face of the adjustment block 10. The adjustment block 10 has an internal thread that matches the size of the external thread of the adjustment screw 11. The adjustment screw 11 is threadedly connected to the adjustment block 10, and a knob 12 is installed on the top of the adjustment block 10.

[0028] The process of adjusting the height of clamping arm 9 is as follows:

[0029] Rotating the knob 12 causes the adjusting screw 11 to rotate, which in turn causes the adjusting block 10 to move up and down. The adjusting block 10 then causes the clamping arm 9 to move up and down, so as to clamp fan blades of different sizes.

[0030] The kiln car body is equipped with several wheels 13 at the bottom to facilitate application in different scenarios.

[0031] In this embodiment, the kiln car is designed with a width of more than 1.5m and a length of 5m to match the blade size; the clamping arm 9 adopts a mechanical thread structure to adapt to the cross-sectional changes caused by the blade width and thickness.

Claims

1. A tunnel kiln car for pyrolyzing large size fan blades, comprising a car body, characterized in that The kiln car body is provided with several sets of steel clamping mechanisms. The kiln car body includes a single-layer steel frame (1), a double-layer composite heat insulation layer (2) is laid on the single-layer steel frame (1), a refractory plate (3) is laid on the double-layer composite heat insulation layer (2), a resin pyrolysis oil collection mechanism is provided above the refractory plate (3), and a SIC ceramic membrane (5) is laid on the resin pyrolysis oil collection mechanism. The steel clamping mechanism is installed on the surface of the SIC ceramic membrane (5).

2. A tunnel kiln trolley for pyrolyzing large size fan blade as claimed in claim 1 wherein The double-layer composite insulation layer (2) has a thickness of 50-100 mm and a thermal conductivity of <0.03 W / (m·K).

3. A tunnel kiln trolley for pyrolyzing large size fan blade as claimed in claim 1 wherein The resin pyrolysis oil collection mechanism includes a resin pyrolysis oil collection plate (4), which is inclined to both sides in the middle.

4. A tunnel kiln trolley for pyrolyzing large size fan blade as claimed in claim 3 wherein The resin pyrolysis oil collecting plate (4) is tilted 5-10° to both sides in the middle.

5. A tunnel kiln trolley for pyrolyzing large size fan blade as claimed in claim 1 wherein Each steel clamping mechanism includes two steel clamping parts (6) symmetrically arranged on the surface of the SIC ceramic film (5). Each steel clamping part (6) includes a steel clamping base (7). A telescopic rod (8) is installed on the steel clamping base (7). A clamping arm (9) is connected to the end of the telescopic rod (8). An adjustment component for adjusting the height of the clamping arm (9) is provided between the clamping arm (9) and the telescopic rod (8).

6. A tunnel kiln trolley for pyrolyzing large size fan blade as claimed in claim 5 wherein The adjustment assembly includes an adjustment block (10) and an adjustment screw (11). The adjustment block (10) is installed at the end of the telescopic rod (8). The clamping arm (9) is installed on the inward end face of the adjustment block (10). The adjustment block (10) has an internal thread that matches the size of the external thread of the adjustment screw (11). The adjustment screw (11) is threadedly connected to the adjustment block (10). A knob (12) is installed on the top of the adjustment block (10).

7. A tunnel kiln trolley for pyrolyzing large size fan blade as claimed in claim 1 wherein The kiln car body is equipped with several wheels (13) at its bottom.

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