TWM624552U - Uniform temperature cracking furnace - Google Patents

Abstract

This work is about a uniform temperature cracking furnace, including an outer furnace, an inner furnace, a plurality of guide tubes and a plurality of heat conduction partitions. The outer furnace and the inner furnace respectively have a combustion chamber and a reaction chamber. The inner furnace is set in the combustion chamber, and the reaction chamber includes In the heating area, each guide tube traverses the heating area, and the two ends of each guide tube are respectively connected to different sides of the outer wall of the inner furnace, and each heat conduction baffle is erected in the heating area and extends from the inner wall of the inner furnace to the center, Each heat conduction baffle is located above each guide tube and is arranged radially at equal angular intervals, thereby dividing the heating area into a plurality of sub-chambers; this can make the interior of the furnace evenly heated, and effectively reduce energy consumption and improve cracking. efficiency.

Description

Ambient temperature cracking furnace

This work is about a cracking furnace, especially a uniform temperature cracking furnace that can evenly heat the inside of the furnace body.

With the vigorous development of the industry, a large number of plastic parts are used in daily life. Due to the characteristics of waste plastics that are not easily decomposed, the recycling of waste plastics has gradually attracted attention. Generally, thermal cracking is used for the recycling of waste plastics, which is mainly to continuously heat a furnace body to a high temperature, so that the waste plastics inside the furnace body can be heated up and decomposed into the desired products.

In addition, in order to heat the waste plastic evenly in the general cracking furnace, most of them use tumbling or internal stirring. However, whether tumbling or stirring requires a lot of power to drive and consumes a lot of extra energy, and the effect of uniform heating inside is still limited. In addition, a large amount of cold air is mixed in the traditional cracking furnace when feeding and discharging materials, thereby increasing the oxygen in the furnace body and affecting the purity of the product, and at the same time greatly reducing the temperature in the furnace body and affecting the cracking efficiency.

In view of this, the creator of the present invention has devoted himself to the research and application of the theory, aiming at the above-mentioned deficiencies of the prior art, to try his best to solve the above-mentioned problems, which has become the goal of the creator's improvement.

The main purpose of this creation is to make the inside of the furnace heat up evenly, and to effectively reduce energy consumption and improve cracking efficiency.

In order to achieve the above purpose, the present invention provides a uniform temperature cracking furnace, which includes an outer furnace, an inner furnace, a plurality of guide tubes and a plurality of heat-conducting partitions. A combustion chamber is formed around the outer furnace. In the room, a reaction chamber is formed around the inner furnace. The reaction chamber includes a heating area. At least a part of each guide tube traverses the heating area, and the two ends of each guide tube are respectively connected to different two sides of the outer wall of the inner furnace. Each heat-conducting baffle is set upright in the heating zone and extends from the inner wall of the inner furnace to the center of the inner furnace. Each heat-conducting baffle is located above each diversion pipe, and each heat-conducting baffle is arranged in a radial and equal angular spacing. Divide the heating zone into a plurality of subchambers.

This creation also has the following effects: the waste plastic can be stacked for heating through the bottom net, and the holes in the bottom net allow the decomposed carbon particles to fall into the collection area. By means of the diversion pipes arranged at equal angular intervals, they can be evenly distributed to effectively achieve the effect of average heating. The contours of the heat-conducting spacer are connected by a plurality of arcs, so that the problem of overheating of the tip can be avoided at high temperatures for a long time. With the pear-shaped thermally conductive baffles that are narrow at the top and wide at the bottom, the high-temperature heat energy at the bottom can be quickly conducted upward and evenly heated. Through the feeding component passing through the outer furnace and the combustion chamber, the high temperature airflow in the combustion chamber can be preheated to improve the cracking efficiency and reduce energy consumption. Through the feeding and exhausting port in the center of the guide plate, the waste plastic can be concentratedly dropped from the center, and the high-temperature gas after cracking can be discharged upwards in a concentrated manner, so that it is not easy to cause tributary interference.

The detailed description and technical content of this creation will be described with the drawings as follows, but the attached drawings are only for illustrative purposes and are not intended to limit this creation.

This creation system provides a uniform temperature cracking furnace, which is used for pyrolyzing a plurality of waste plastics A to generate carbon particles B and high-temperature gases C (such as alkanes and alkenes). Referring to FIGS. 1 to 3 , the uniform temperature cracking furnace mainly includes an outer furnace 10 , an inner furnace 20 , a plurality of guide tubes 30 and a plurality of heat-conducting partitions 40 .

A combustion chamber 11 is formed around the outer furnace 10 . In this embodiment, the bottom of the outer furnace 10 has a hot air inlet 12 connected to the combustion chamber 11 , and the hot air inlet 12 is for the entry of the high temperature airflow D generated by the combustion of a burner (not shown). However, the present invention is not limited to this. For example, the bottom of the outer furnace 10 can also be closed and the burner is directly arranged at the bottom of the combustion chamber 11 of the outer furnace 10, as long as the high-temperature airflow D generated by the burner can flow upward from the bottom of the combustion chamber 11. That's it.

The inner furnace 20 is installed in the combustion chamber 11 and is generally cylindrical. A reaction chamber 21 is formed around the inner furnace 20 . The top of the inner furnace 20 is provided with a gas outlet pipe 22 passing through the outer furnace 10 and communicating with the reaction chamber 21 , so that the high temperature gas C generated after cracking can be discharged from the gas outlet pipe 22 to the reaction chamber 21 . The reaction chamber 21 includes a collection area 211, a heating area 212 and a feeding area 213 from bottom to top, that is, the collecting area 211 is located at the bottom of the reaction chamber 21, the feeding area 213 is located at the top of the reaction chamber 21, and the heating area is located at the top of the reaction chamber 21. 212 is located between the collecting area 211 and the feeding area 213 . In this embodiment, the collection area 211 is in the shape of a funnel, but the present invention is not limited to this. In addition, the uniform temperature cracking furnace of the present creation also includes a bottom net 50 . The bottom net 50 is disposed at the junction between the collecting area 211 and the heating area 212 , so that the waste plastic A to be cracked can be stacked on the bottom net 50 for heating. In addition, the bottom net 50 has a plurality of holes so that the decomposed carbon particles B can pass through and fall into the collection area 211 .

Each of the guide tubes 30 is a metal tube body with high melting point and high thermal conductivity. Each of the guide tubes 30 spans from the collection area 211 to the heating area 212 respectively, and two ends of each guide tube 30 are connected to different sides of the outer wall of the inner furnace 20 respectively. Specifically, each guide tube 30 is bent upward from the collection area 211 and extends out of the bottom net 50 , and extends laterally along the bottom net 50 to be connected to the walls of the inner furnace 20 on different sides. In this way, the high-temperature airflow D generated by the burner can enter from one end of each guide tube 30 located in the collection area 211 , flow through each guide tube 30 and be discharged to the outside of the inner furnace 20 on the opposite side, so that each guide The tube 30 can be continuously heated by the flowing high temperature gas stream D. In this embodiment, the number of the guide tubes 30 is three, but the present invention is not limited to this. Preferably, the diversion tubes 30 are arranged at equal angular intervals, so that the diversion tubes 30 can be evenly distributed to effectively achieve the effect of average heating.

Each thermally conductive separator 40 is a metal plate body having a high melting point and high thermal conductivity. Each of the heat-conducting partitions 40 is disposed upright in the heating zone 212 , and extends from the inner wall of the inner furnace 20 to the center of the inner furnace 20 . Each of the thermally conductive partitions 40 is located above each of the guide tubes 30 , and the thermally conductive partitions 40 are radially arranged at equal angular intervals to partition the heating area 212 into a plurality of sub-chambers 212A. In this way, the bottom of the sub-chamber 212A has a guide tube 30 for heating, and there are two heat-conducting partitions 40 and the inner wall of the inner furnace 20 on the side for heating together, so that the semi-molten waste plastic in the sub-chamber 212A can be heated. A effectively heats and generates eddy currents, so as to achieve the effect of rapid and uniform heating. Preferably, the number of thermally conductive partitions 40 in this embodiment is six, so that the transverse section of each sub-chamber 212A is approximately an equilateral triangle to achieve the best heating effect, but the present invention is not limited to this, for example, the thermal conductivity The number of the partitions 40 may also be two, three, four, five or more than seven.

It is worth noting that the contour of the end edge of each thermally conductive separator 40 in the present invention is curved. Specifically, the heat-conducting separator 40 extends from the inner wall of the inner furnace 20 toward the center, and the edge located at the center side of the inner furnace 20 is a curve formed by connecting a plurality of arcs, so that each heat-conducting separator 40 can avoid the long-term high temperature Problem with overheating of the tip. In addition, in the present embodiment, each thermally conductive partition 40 is generally in the shape of a pear with a narrow top and a wide bottom, that is, the area of the lower half of the thermally conductive partition 40 is larger than the area of the upper half, but the present invention is not limited to this. . In this way, the larger area of the lower half of the heat-conducting separator 40 can quickly conduct the heat energy at the bottom to the upper part, so that the waste plastic A can be heated uniformly and quickly reach a semi-melted state.

To further illustrate, the isothermal cracking furnace of the present invention also includes a feeding mechanism 60 and a material guide plate 70 . The feeding mechanism 60 passes through the top of the outer furnace 10, the combustion chamber 11, the inner furnace 20 and the reaction chamber 21, and is used to feed the waste plastic A from the feeding area 213 to the heating area 212, so as not to cause any damage to the waste plastic A. A large amount of air enters during feeding, which affects product purity and cracking efficiency. In this embodiment, the feeding mechanism 60 includes a feeding trough 61 and a feeding component 62 . The feeding trough 61 is disposed outside the outer furnace 10 and is used to store the waste plastic A to be cracked for the feeding component 62 to deliver quantitatively. . In this embodiment, the feeding component 62 includes a motor 621 and a screw 622 driven by the motor 621, but the present invention is not limited to this. In addition, the portion passing through the outer furnace 10 and the combustion chamber 11 of the material conveying assembly 62 can be preheated by the high temperature gas stream D in the combustion chamber 11 to improve cracking efficiency and reduce energy consumption. The material guide plate 70 is arranged in the feeding area 213. The material guide plate 70 is approximately in the shape of an inverted cone and has a feeding and exhaust port 71 in the center. At the same time, the high-temperature gas C after the cracking is concentrated and discharged upwards, and it is not easy to cause tributary interference. An annular guide slope 72 is formed between the inner wall of the inner furnace 20 and the feed and exhaust port 71 on the feed guide plate 70 , so that the waste plastic A can slide along the guide slope 72 to the feed and exhaust. The port 71 then drops to the center of the heating zone 212 . In this embodiment, the guide slope 72 is an arc surface that is bent downward from the inner wall of the inner furnace 20 toward the feed and exhaust port 71, but the present invention is not limited to this, for example, the guide slope 72 can also be A slope, as long as it can play the role of guiding the waste plastic A to the inlet and outlet 71 .

The uniform temperature cracking furnace of the present invention also includes an aggregate assembly 80 . The collecting assembly 80 is connected to the conical bottom of the collecting area 211 and is used to collect the carbon particles B falling in the collecting area 211 . In this embodiment, the collecting assembly 80 includes a feeding channel 81 and a conveying belt 82. The feeding channel 81 is connected to the conical bottom of the collecting area 211 and passes through the hot air inlet 12 to the outside of the outer furnace 10, and is then conveyed through the The belt 82 transports and collects the dropped carbon particles B to the required place, but the present creation is not limited to this.

Please refer to FIG. 4 and FIG. 5 , a brief description of the cracking process of the uniform temperature cracking furnace of the present invention is as follows: After the waste plastic A is fed into the feeding trough 61 of the feeding mechanism 60 , it is quantitatively transported to the reaction chamber 21 through the feeding component 62 . The inner feeding area 213 is used for feeding, and it is dropped to the bottom mesh 50 through the feeding and exhaust port 71 in the center of the feeding plate 70 for accumulation. The high-temperature airflow D generated by the burner enters the combustion chamber 11 through the hot-air inlet 12 , and the high-temperature airflow D partially flows through and heats the guide tubes 30 to heat the waste plastic A on the bottom net 50 , and the rest flows from the inner furnace 20 . The bottom flows upward along the outer wall of the inner furnace 20 to heat the entire inner furnace 20 wall. Each heat-conducting partition 40 is heated up through the heat energy conducted by the wall of the inner furnace 20, so the highest temperature in the reaction chamber 21 is each guide tube 30 located on the bottom net 50, where the waste plastic A is first heated up to In the semi-molten state, the temperature is conducted to the waste plastic A above through the heat-conducting partitions 40 and the inner wall of the inner furnace 20. When the waste plastic A in the entire sub-chamber 212A reaches the semi-molten state, eddy currents can be generated to conduct heat. Convection to heat up evenly. When the semi-molten waste plastic A continues to heat up to the pyrolysis temperature, it is decomposed into carbon particles B and high-temperature gas C. The carbon particles B fall through the bottom net 50 into the collection area 211 and enter along the funnel-shaped wall. The unloading channel 81 is transported to the outside by the conveyor belt 82, and the high-temperature gas C is discharged from the reaction chamber 21 through the feed exhaust port 71 and the gas outlet pipe 22 in sequence, and can be cooled by a condenser (not shown in the figure). Liquefy and collect.

To sum up, this creation has industrial applicability, novelty and progress, and fully meets the requirements for patent application. Of course, this creation can also have other various embodiments, without departing from the spirit and essence of this creation, those skilled in the art can evolve various corresponding changes and deformations according to this creation, but these corresponding changes and deformation shall belong to the protection scope of the patent applied for in this creation.

10: Outer furnace 11: Combustion chamber 12: Hot air inlet 20: Inner furnace 21: Reaction Chamber 211: Collection area 212: Heating zone 212A: Subchamber 213: Feeding area 22: Outlet tube 30: Drain tube 40: Thermal Separator 50: Bottom net 60: Feeding mechanism 61: Feeding chute 62: Conveying components 621: Motor 622: Screw 70: guide plate 71: Feed exhaust port 72: Guide slope 80: Aggregate components 81: cutting channel 82: Conveyor belt A: Waste plastic B: carbon particles C: high temperature gas D: high temperature airflow

Figure 1 is a sectional view of this creation.

FIG. 2 is a cross-sectional view of 2-2 of FIG. 1 .

FIG. 3 is a sectional view taken along line 3-3 of FIG. 1 .

Figure 4 is a cross-sectional view of the present creation in the use state (1).

Figure 5 is a cross-sectional view of the present creation in the use state (2).

10: Outer furnace

11: Combustion chamber

12: Hot air inlet

20: Inner furnace

21: Reaction Chamber

211: Collection area

212: Heating zone

213: Feeding area

22: Outlet tube

30: Drain tube

40: Thermal Separator

50: Bottom net

60: Feeding mechanism

61: Feeding chute

62: Conveying components

621: Motor

622: Screw

70: guide plate

71: Feed exhaust port

72: Guide slope

80: Aggregate components

81: cutting channel

82: Conveyor belt

Claims (10)

A uniform temperature cracking furnace, comprising: an outer furnace, a combustion chamber is formed around the outer furnace; an inner furnace, set in the combustion chamber, a reaction chamber is formed around the inner furnace, and the reaction chamber includes a heating zone; a plurality of guide pipes, at least a part of each guide pipe traverses the heating zone, and two ends of each guide pipe are respectively connected to different two sides of the outer wall of the inner furnace; and A plurality of thermally conductive partitions are respectively erected in the heating zone and extend from the inner wall of the inner furnace to the center of the inner furnace, the thermally conductive partitions are located above the guide tubes, and each of the thermally conductive partitions is in the shape of a The heating zone is divided into a plurality of sub-chambers by arranging radially at equal angular intervals. The uniform temperature cracking furnace as claimed in claim 1, wherein the contour of the end edge of each of the thermally conductive separators is curved. The uniform temperature cracking furnace according to claim 1, wherein each of the thermally conductive partitions is generally narrow at the top and wide at the bottom. The uniform temperature cracking furnace according to claim 1, wherein the number of thermally conductive partitions is six, and the transverse section of each of the sub-chambers is approximately an equilateral triangle. The uniform temperature cracking furnace according to claim 1, wherein the guide pipes are arranged at equal angular intervals. The isothermal cracking furnace according to claim 1, wherein the reaction chamber further comprises a collection area and a feed area, the collection area is located below the heating area, and the feed area is located above the heating area. The uniform temperature cracking furnace as claimed in claim 6, wherein each of the guide pipes is respectively connected from the collection area to the heating area. The uniform temperature cracking furnace according to claim 6, wherein the feeding area is provided with a material guide plate, and the material guide plate is formed with a guiding slope. The uniform temperature cracking furnace according to claim 6, further comprising a bottom net, the bottom net being arranged between the collecting area and the heating area. The uniform temperature cracking furnace according to claim 1, wherein a top of the inner furnace is provided with a gas outlet pipe passing through the outer furnace, and the gas outlet pipe communicates with the reaction chamber.

Images