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Method for catalytic hydrolysis of freon and device thereof

A technology of catalytic hydrolysis and freon, applied in the field of catalytic decomposition of chlorofluoroalkanes, can solve the problems of high cost, inability to recover effective substances, pollutants, etc., and achieve the effects of long service life, cheap and easy-to-obtain catalysts, and low reaction temperature

Active Publication Date: 2013-01-30
JIANGXI GREEN ECO MFG RESOURCE CYCLE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when recycling household appliances such as refrigerators and air conditioners, Freon is collected separately. Most of Freon is treated by combustion method, which makes Freon burn at about 800-1200°C. Other methods such as microwave decomposition method and plasma method are also being studied. , but the microwave decomposition method and plasma method are too costly, and the combustion method will produce new pollutants, and effective substances cannot be recovered, resulting in waste of resources

Method used

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  • Method for catalytic hydrolysis of freon and device thereof
  • Method for catalytic hydrolysis of freon and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] figure 1 Is the process flow chart of this embodiment. like figure 1 As shown, water vapor and freon are respectively passed into the tee pipe 1 from both ends, and then pass through the U-shaped reactor 2. The U-shaped reactor has two sections, the first section is connected to the tee pipe, and the second section is connected to the heat exchanger. The U-shaped reactor is equipped with a mixture of aluminum sulfate, aluminum phosphate, and iron phosphate (aluminum sulfate, aluminum phosphate, and iron phosphate are dried and dehydrated, passed through a 100-200 mesh sieve, and then according to the molar ratio of 1:0.3~1:0.3~ 1 mixing), the mixed gas passes through the U-shaped reactor, then exchanges and cools through the heat exchanger 3, and then enters the absorption device (absorption towers 4, 5, 6, and 7 form the absorption device of this scheme).

[0016] Specific steps:

[0017] Aluminum sulfate, aluminum phosphate and iron phosphate are dried and dehydrat...

Embodiment 2

[0019] figure 2 It is a structural schematic diagram of the equipment for catalytic hydrolysis of Freon in the present invention. like figure 2 As shown, according to the running direction of Freon and water vapor, the equipment includes a tee pipe 1, a U-shaped reactor 2, a heat exchanger 3, and an absorption device (the absorption device is four absorption towers, i.e. absorption towers 4, 5, 6, 7), the tee pipe is connected with the U-shaped reactor, and the U-shaped reactor has two sections, the first section is connected with the tee pipe, the second section is connected with the heat exchanger, and the outlet end of the second section of the U-shaped reactor is connected with the heat exchanger. The exchanger is connected, and the outlet of the heat exchanger is connected with the absorption device. The device has simple structure, low cost and high decomposition and absorption efficiency.

Embodiment 3

[0021] use figure 2 As shown in the equipment for catalytic hydrolysis of freon, water vapor and freon are respectively passed into the tee pipe 1 from both ends, and then pass through the U-shaped reactor 2. The U-shaped reactor is divided into two sections, which are filled with aluminum sulfate, aluminum phosphate, phosphoric acid Iron mixture (aluminum sulfate, aluminum phosphate, iron phosphate are dried and dehydrated, passed through a 100-mesh sieve, and then mixed according to a molar ratio of 1:0.3:0.3), the mixed gas passes through the U-shaped reactor, and then exchanged by the heat exchanger 3 After cooling, it enters the absorption device (absorption towers 4, 5, 6, and 7 form the absorption device of this scheme). The temperature of the U-shaped reactor in the first section is controlled at 400°C, and the temperature in the second section is controlled at 510°C. At the same time, the flow rate of the Freon airflow and water vapor is controlled to make the Freon ...

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Abstract

The invention relates to catalytic hydrolysis of chloro-fluoro alkane, particularly relates to a method for catalytic hydrolysis of freon and a device thereof. The device disclosed herein successively comprises a T-pipe, a U-shaped rector, a heat exchanger, and an absorption unit in the moving direction of freon and water vapor, wherein the T-pipe is connected with the U-shaped reactor, the U-shaped reactor comprises two sections, the outlet end of the U-shaped reactor is connected with the heat exchanger, and the outlet of the exchanger is connected with the absorption unit. Compared with the prior art, according to the invention, the decomposition rate of freon can reach to more than 95%, the reaction temperature is lower, the catalyst is cheap and easily available and has long service life, the product obtained by hydrolysis can be completely utilized without secondary pollution; the device has the advantages of simple structure, low cost, and high decomposition and absorption efficiency.

Description

technical field [0001] The invention relates to the catalytic decomposition of chlorofluoroalkanes, in particular to a method and equipment for catalytic hydrolysis of Freon. Background technique [0002] Freon and other ozone-depleting substances are the culprits of ozone layer destruction. Freon was synthesized in the 1920s. It is chemically stable, non-flammable and toxic. It is used as a refrigerant, foaming agent and cleaning agent, and is widely used in household appliances. , foam plastics, daily chemicals, automobiles, fire fighting equipment and other fields. In the late 1980s, the production of Freon reached its peak, and the output reached 1.44 million tons. Before the control of Freon, the amount of Freon discharged into the atmosphere in the world has reached 20 million tons. Because of their average lifetime in the atmosphere of hundreds of years, it can persistently destroy the ozone layer and is a greenhouse gas. At present, when recycling household applia...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/70
Inventor 王勤陈艳红闫梨谭翠丽苏陶贵何显达
Owner JIANGXI GREEN ECO MFG RESOURCE CYCLE
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