Catalytic cracking device for continuously feeding solid raw materials

Abstract

The utility model discloses a catalytic cracking device capable of continuously feeding solid raw materials, and aims to add a connecting pipe between a spiral pusher and a fluidized bed to assist in feeding, melt plastic particles are adhered in an inner sleeve, and the inner sleeve is replaceable and convenient to clean. Comprising a fluidized bed, a raw material tank and a spiral pusher arranged at the bottom of the raw material tank, the raw material tank is used for bearing plastic particles, and the output end of the spiral pusher is communicated with the fluidized bed through a connecting pipe; the connecting pipe comprises an outer sleeve, one end of the outer sleeve is fixedly connected with the fluidized bed, the other end of the outer sleeve is detachably connected with the output end of the spiral pusher, an inner sleeve is detachably installed in the outer sleeve, and plastic particles are conveyed into the fluidized bed through the inner sleeve; the outer sleeve is made of a metal material, and the inner sleeve is made of a glass material.

Description

Technical Field

[0001] The utility model belongs to the technical field of catalytic cracking, and more specifically relates to a catalytic cracking device for continuously feeding solid raw materials. Background Art

[0002] At present, there are four main methods for recycling waste plastics: landfill, incineration, physical screening and separation reuse, and oil technology. The first three methods will not only cause secondary pollution to the ecological environment, but also endanger human health. Oil technology can crack into fuel oil, that is, gasoline and diesel. The cracking products have high use value, so catalytic cracking is generally used to treat waste plastics.

[0003] CN102977927A discloses a device for preparing synthesis gas based on dual fluidized bed biomass gasification, comprising a hopper, a dryer, a screw feeder, a pyrolysis fluidized bed, a reforming fluidized bed, a reforming cyclone separator, a calcining fluidized bed, a calcining cyclone separator, a first U-shaped return feeder, a second U-shaped return feeder and a third U-shaped return feeder;

[0004] The above device can be used for catalytic cracking. Plastic particles are added into a hopper and transported to a fluidized bed by a screw feeder to achieve continuous feeding. After entering the fluidized bed, the plastic particles are vaporized and contact with the catalyst to perform a catalytic cracking reaction.

[0005] However, in practice, it is found that the temperature of the part of the screw feeder close to the fluidized bed is relatively high, and the plastic particles inside it will melt and stick to the spiral blades and the inner wall of the tube, affecting the transportation of the plastic particles. The screw pusher needs to be disassembled for processing, which is more troublesome. Utility Model Content

[0006] The main purpose of the utility model is to provide a catalytic cracking device for continuous feeding of solid raw materials, aiming to add a connecting pipe between the screw pusher and the fluidized bed to assist in feeding, and the plastic particles are melted and adhered to the inner sleeve, and the inner sleeve is replaceable for easy cleaning.

[0007] According to a first aspect of the utility model, a catalytic cracking device for continuous feeding of solid raw materials is provided, comprising a fluidized bed, a raw material tank and a screw pusher arranged at the bottom of the raw material tank, wherein the raw material tank is used to carry plastic particles, and the output end of the screw pusher is connected to the fluidized bed through a connecting pipe;

[0008] The connecting pipe comprises an outer sleeve, one end of which is fixedly connected to the fluidized bed, and the other end of which is detachably connected to the output end of the spiral pusher. An inner sleeve is detachably installed inside the outer sleeve, and the plastic particles are transported to the fluidized bed through the inner sleeve.

[0009] The outer sleeve is made of metal, and the inner sleeve is made of glass.

[0010] In the above-mentioned catalytic cracking device with continuous feeding of solid raw materials, the connecting pipe is inclined downward along its feeding direction.

[0011] In the above-mentioned catalytic cracking device with continuous feeding of solid raw materials, an annular flange is provided on the outer wall of the inner sleeve near the screw pusher, and an annular groove for embedding the annular flange is provided on the end surface of the outer sleeve near the screw pusher.

[0012] In the above-mentioned catalytic cracking device with continuous feeding of solid raw materials, the side of the annular flange facing away from the spiral pusher is provided with reinforcing ribs extending to the outer wall of the inner sleeve, and the outer sleeve is provided with through grooves for the reinforcing ribs to pass through.

[0013] In the above-mentioned catalytic cracking device with continuous feeding of solid raw materials, the reinforcing ribs are multiple and evenly distributed around the axis of the inner sleeve.

[0014] In the above-mentioned catalytic cracking device with continuous feeding of solid raw materials, a side of the annular flange close to the spiral pusher is connected to the inner wall of the inner sleeve by a circular arc transition.

[0015] In the above-mentioned catalytic cracking device with continuous feeding of solid raw materials, the end of the inner sleeve away from the screw pusher extends into the fluidized bed.

[0016] In the above-mentioned catalytic cracking device with continuous feeding of solid raw materials, a gap is left between the outer wall of the inner sleeve and the inner wall of the outer sleeve.

[0017] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:

[0018] In the utility model, a connecting pipe is added between the spiral pusher and the fluidized bed to assist in feeding. The connecting pipe is a double-layer pipe, and its inner sleeve is made of glass. The plastic particles are transported to the fluidized bed through the inner sleeve. The connecting pipe is closer to the fluidized bed. After the connecting pipe is heated, the plastic particles will melt and stick in the inner sleeve. The outer sleeve is made of stainless steel and is mainly used to protect the inner sleeve. After a period of use, the inner sleeve can be removed and replaced to keep the plastic particle conveying path unobstructed. In this structure, the plastic particles will not melt and stick in the spiral pusher, and it is relatively simple and convenient to handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0020] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0021] Figure 2 This is a schematic structural diagram of a connecting pipe according to a first embodiment of the present utility model;

[0022] Figure 3 It is a structural exploded view of the connecting pipe of the first embodiment of the utility model.

[0023] Among them, the reference numerals of each figure are:

[0024] 1. Fluidized bed; 2. Raw material tank; 3. Screw pusher; 4. Connecting pipe; 41. Outer sleeve; 411. Annular groove; 412. Through groove; 42. Inner sleeve; 421. Annular flange; 422. Reinforcing rib. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.

[0027] Reference Figures 1 to 3 As shown, in one embodiment of the utility model, a catalytic cracking device for continuous feeding of solid raw materials comprises a fluidized bed 1, a raw material tank 2 and a screw pusher 3 arranged at the bottom of the raw material tank 2, the raw material tank 2 is used to carry plastic particles, and the output end of the screw pusher 3 is connected to the fluidized bed 1 through a connecting pipe 4;

[0028] The connecting pipe 4 includes an outer sleeve 41, one end of which is fixedly connected to the fluidized bed 1, and the other end of which is detachably connected to the output end of the screw pusher 3. An inner sleeve 42 is detachably installed inside the outer sleeve 41, and the plastic particles are transported to the fluidized bed 1 through the inner sleeve 42.

[0029] The outer sleeve 41 is made of metal, and the inner sleeve 42 is made of glass;

[0030] When in use, the plastic particles are first put into the raw material tank 2, and the bottom opening of the raw material tank 2 is connected to the spiral pusher 3. The spiral pusher 3 runs to push the plastic particles into the inner sleeve 42. As the spiral pusher 3 continues to run, the plastic particles in the inner sleeve 42 will be pushed into the fluidized bed 1 for catalytic cracking; the inner sleeve 42 is made of glass, and the plastic particles are transported to the fluidized bed 1 through the inner sleeve 42. The connecting pipe 4 is closer to the fluidized bed 1. After the connecting pipe 4 is heated, the plastic particles will melt and stick in the inner sleeve 42. The outer sleeve 41 is made of stainless steel, which is mainly used to protect the inner sleeve 42. After a period of use, the inner sleeve 42 can be removed and replaced to keep the plastic particle conveying path unobstructed. In this structure, the plastic particles will not melt and stick in the spiral pusher 3, and it is relatively simple and convenient to handle.

[0031] In this embodiment, the connecting pipe 4 is tilted downward along its feeding direction, which can assist in the transportation of plastic particles; therefore, it can be seen that the inner sleeve 42 and the outer sleeve 41 are both arranged tilted;

[0032] An annular flange 421 is provided on the outer wall of the inner sleeve 42 at one end close to the screw pusher 3, and an annular groove 411 for embedding the annular flange 421 is provided on the end surface of the outer sleeve 41 at one end close to the screw pusher 3;

[0033] One end of the inner sleeve 42 away from the screw pusher 3 extends into the fluidized bed 1;

[0034] Based on the inclined arrangement of the inner sleeve 42 and the outer sleeve 41 , the inner sleeve 42 can be stably hung in the outer sleeve 41 by means of the annular flange 421 , and after the plastic particles enter the inner sleeve 42 , they can be directly transported into the fluidized bed 1 .

[0035] Moreover, the temperature of the portion of the connecting pipe 4 close to the fluidized bed 1 is relatively high, so the inner sleeve 42 will also expand due to heat. Therefore, a gap is left between the outer wall of the inner sleeve 42 and the inner wall of the outer sleeve 41, allowing the inner sleeve 42 to have a certain space for expansion. The end of the inner sleeve 42 close to the spiral pusher 3 is relatively far away from the fluidized bed 1, so it hardly expands, and the annular flange 421 can be firmly embedded in the annular groove 411.

[0036] In this embodiment, the end of the outer sleeve 41 close to the fluidized bed 1 is fixedly connected to the fluidized bed 1, and the end of the outer sleeve 41 close to the screw pusher 3 is detachably connected to the screw pusher 3. Therefore, when replacing the inner sleeve 42, the end of the outer sleeve 41 close to the screw pusher 3 is removed, and then the inner sleeve 42 is pulled out. Since the connecting pipe 4 is arranged obliquely and the annular flange 421 is embedded in the annular groove 411, it is difficult to pull out the inner sleeve 42.

[0037] Therefore, a reinforcing rib 422 extending to the outer wall of the inner sleeve 42 is provided on the side of the annular flange 421 facing away from the screw pusher 3, and a through groove 412 for the reinforcing rib 422 to pass through is provided on the outer sleeve 41; in this way, the reinforcing rib 422 can be exposed to the outside, and the inner sleeve 42 can be moved by pushing the reinforcing rib 422, so that the annular flange 421 leaves the annular groove 411, so that the annular flange 421 can be easily grasped;

[0038] Preferably, there are multiple reinforcing ribs 422 that are evenly distributed circumferentially around the axis of the inner sleeve 42, and can play a certain supporting role.

[0039] In this embodiment, a surface of the annular flange 421 close to the screw pusher 3 is connected to the inner wall of the inner sleeve 42 by an arc transition; the plastic particles can smoothly enter the inner sleeve 42 .

[0040] In this embodiment, the raw material tank 2 and the screw pusher 3 are arranged on a corresponding frame, and the frame is movable. When the inner sleeve 42 needs to be removed, the raw material tank 2 and the screw pusher 3 can be temporarily removed.

[0041] In this embodiment, a valve may be provided between the screw pusher 3 and the connecting pipe 4, so that the output end of the screw pusher 3 may be closed when the inner sleeve 42 is not in use or is replaced.

[0042] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A catalytic cracking device for continuous feeding of solid raw materials, comprising a fluidized bed, a raw material tank and a screw pusher arranged at the bottom of the raw material tank, wherein the raw material tank is used to carry plastic particles, characterized in that: The output end of the spiral pusher is connected to the fluidized bed through a connecting pipe; The connecting pipe comprises an outer sleeve, one end of which is fixedly connected to the fluidized bed, and the other end of which is detachably connected to the output end of the spiral pusher. An inner sleeve is detachably installed inside the outer sleeve, and the plastic particles are transported to the fluidized bed through the inner sleeve. The outer sleeve is made of metal, and the inner sleeve is made of glass.

2. The catalytic cracking device for continuous feeding of solid raw materials according to claim 1, characterized in that: The connecting pipe is inclined downward along its feeding direction.

3. The catalytic cracking device for continuous feeding of solid raw materials according to claim 1 or 2, characterized in that: An annular flange is arranged on the outer wall of one end of the inner sleeve close to the spiral pusher, and an annular groove for embedding the annular flange is arranged on the end surface of one end of the outer sleeve close to the spiral pusher.

4. The catalytic cracking device for continuous feeding of solid raw materials according to claim 3, characterized in that: A reinforcing rib extending to the outer wall of the inner sleeve is arranged on the side of the annular flange facing away from the spiral pusher, and a through groove for the reinforcing rib to pass through is arranged on the outer sleeve.

5. The catalytic cracking device for continuous feeding of solid raw materials according to claim 4, characterized in that: The reinforcing ribs are multiple and evenly distributed around the axis of the inner sleeve.

6. The catalytic cracking device for continuous feeding of solid raw materials according to claim 3, characterized in that: A side of the annular flange close to the spiral pusher is connected to the inner wall of the inner sleeve by a circular arc transition.

7. The catalytic cracking device for continuous feeding of solid raw materials according to claim 1, characterized in that: One end of the inner sleeve away from the screw pusher extends into the fluidized bed.

8. The catalytic cracking device for continuous feeding of solid raw materials according to claim 1, characterized in that: A gap is left between the outer wall of the inner sleeve and the inner wall of the outer sleeve.

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