Intermittent vacuum pyrolysis reactor with built-in heat conducting pipe

A pyrolysis reactor and heat pipe technology, applied in the chemical industry, can solve problems such as the sealing effect of the connection sealing surface of easily polluted equipment, the difficulty in controlling the pyrolysis process, and the difficulty in opening the equipment, so as to solve the problem of incomplete pyrolysis reaction and easy disassembly Cleaning and solving the effect of many by-products

Inactive Publication Date: 2010-08-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using it to pyrolyze waste rubber or waste plastics and other polymeric organic matter, some viscous liquid phase products will adhere to the connection between the upper end cover and the equipment cylinder and the nozzle of the gas phase pyrolysis product discharge pipe. Accumulation; when the equipment is cooled, these adhesion products will condense into hard solid substances, which will make it difficult to open the equipment and easily contaminate the sealing surface of the equipment, resulting in a decrease in the sealing effect
In addition, the heat required for material pyrolysis is transferred from the metal wall to the inside of the material in the form of heat conduction; in this way, for raw materials such as granular plastics or rubber, due to their weak thermal conductivity and the gas existing in the gaps of the particles, when heated , the thermal resistance is large, the heat transfer effect is poor, and the pyrolysis process is not easy to control

Method used

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  • Intermittent vacuum pyrolysis reactor with built-in heat conducting pipe
  • Intermittent vacuum pyrolysis reactor with built-in heat conducting pipe
  • Intermittent vacuum pyrolysis reactor with built-in heat conducting pipe

Examples

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Effect test

Embodiment 1

[0033] Example 1: It is used in the pyrolysis resource recovery reaction of waste tires. The reaction device and the pyrolysis process flow shown in Fig. 2 are adopted. Taking into account the heat transfer effect of the built-in heat pipe and the filling capacity of the material in the cylinder, the ratio of the outer diameter of the built-in heat pipe 9 to the inner diameter of the cylinder is between 0.3-0.7, and the height should be greater than 1 / 3 of the height of the cylinder. The pipe material should be selected High-temperature-resistant low-alloy steel material; the angle α between the horn-shaped baffle 8 and the pyrolysis product discharge pipe 4 (as shown in Figure 1) should be controlled between 30° and 60°, and the angle α between the horn-shaped baffle 8 and the cylinder body 2 The inner wall gap should be less than 0.5mm. Cut waste tires into 8cm 3 For particles of about size, weigh 50g, 70g, and 100g of sample material respectively, place them in the reacto...

Embodiment 2

[0034]Example 2: It is used for the pyrolysis and recycling reaction of waste printed circuit boards. Use crushing equipment to crush the dismantled waste printed circuit boards into granular materials with a particle size of 0.4-0.6mm, and inject samples with 50g, 70g, and 100g materials respectively, using the equipment of the present invention and the process flow shown in Figure 2 and Example 1 The setting of the built-in heat pipe 9 and the trumpet-shaped baffle 8 described in , can convert the organic polymer substances such as epoxy resin in the non-metallic substances in the pulverized particles into pyrolysis oil, and the temperature is programmed to rise 10°C / min. Controlled at 450-600°C, the oil yield is about 7.4%, achieving high value; and the metal and non-metallic inorganic substances in the pyrolysis solid slag can be completely separated.

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Abstract

The invention relates to an intermittent vacuum pyrolysis reactor with a built-in heat conducting pipe, which comprises an upper end cover, a barrel, a pyrolysis product discharging pipe, a thermocouple sheath, an air inlet pipe, a lower end cover, an O-shaped sealing ring, a baffle and the built-in heat conducting pipe. The upper end cover and the lower end cover are respectively arranged on the upper and lower ends of the barrel; the thermocouple sheath, the air inlet pipe and the pyrolysis product discharging pipe are arranged on the upper end cover; the lower end of the pyrolysis product discharging pipe is connected with the baffle; the thermocouple sheath and the air inlet pipe are respectively positioned on two sides of the pyrolysis product discharging pipe and pass through the flared baffle; the upper end cover and the barrel are sealed by the O-shaped sealing ring; and the built-in heat conducting pipe is welded in the center of the lower end cover. Through the structure, the reactor of the invention not only strengthens the heat conducting effect of the device, effectively solves the problem of the incomplete pyrolysis reaction and much more by-products caused by uneven heating and has excellent sealing property, but also can effectively solve the problems that the end cover is difficult to open because the pyrolysis product solidifies and deposits at the joint between the end cover and the barrel and the like. The device is convenient to disassemble and operate.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a pyrolysis reaction device for organic macromolecular substances with built-in heat conduction tubes in a vacuum atmosphere to enhance heat transfer, and is suitable for research on pyrolysis laws and environmental impact mechanisms of waste high-molecular organic substances in laboratories of factories, mines, enterprises and scientific research units . Background technique [0002] Pyrolysis is a reaction process in which substances are decomposed by heat. It is a common practical technology used by scientific and technological workers engaged in scientific research and product development. The pyrolysis reaction equipment used in the laboratory is usually a vertical tubular reactor operated intermittently at atmospheric pressure. When using it to pyrolyze waste rubber or waste plastics and other polymeric organic matter, some viscous liquid phase products will adhere to the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/10B09B3/00C10B53/07
CPCY02P20/143
Inventor 贺文智李光明殷进周萍黄菊文
Owner TONGJI UNIV
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