CN106782478B - Device and method for preparing sound absorption material from waste circuit board - Google Patents

Abstract

A device and method for preparing sound-absorbing materials from waste circuit boards, including a high-temperature and high-pressure reactor, a temperature controller, a _pressure controller, a _CO2 gas cylinder, a _CO2 pressurizing device, and a pressure relief device; the high-temperature and high-pressure reactor is respectively connected to the temperature controller and the pressure controller; the top of the high-temperature and high-pressure reactor is connected to the pressure relief device through a first pipeline; the bottom _of the high-temperature and high-pressure reactor is connected to a _CO2 pressurization device through a second pipeline; There are valves on it. Put the waste circuit board non-metal enriched body and n-hexane into the high-temperature and high-pressure reactor, close it, raise the temperature, and pressurize _CO2 through the _CO2 pressurization device; let the high-pressure _CO2 pass into the high-temperature and high-pressure reactor, after the reaction is completed, cool to room temperature, then reduce the _CO2 to normal pressure through the pressure relief device and enter the _CO2 gas cylinder through the pipeline for recovery; the solid phase product obtained by separation is the sound-absorbing material product, which is used for the test of the sound absorption coefficient.

Description

A device and method for preparing sound-absorbing materials from waste circuit boards

【Technical field】

The invention relates to a device and method for preparing sound-absorbing materials from waste circuit boards.

【Background technique】

In the past 10 years, with the development of the electronics industry, the production and consumption of electronic products have grown extremely rapidly. With the replacement of electronic products, a large amount of electronic waste is generated. As the most basic unit of electronic waste, discarded printed circuit boards contain many heavy metal elements, resins and inorganic non-metallic materials, which have a huge adverse impact on the environment. Therefore, recycling high value-added products from waste circuit boards has high environmental and economic benefits at the same time.

At present, the recycling process of waste circuit boards is first to use mechanical and physical separation to separate the waste circuit boards to obtain metal-enriched bodies and non-metal-enriched bodies. Metal-rich bodies contain high-grade metals and thus have high added value, and can be sold directly on the market. However, there are few recycling methods for non-metal-rich substances, or the added value of recycled products is low.

【Content of invention】

One of the technical problems to be solved by the present invention is to provide a pollution-free and high value-added device for preparing sound-absorbing materials from waste circuit boards.

The second technical problem to be solved by the present invention is to provide a pollution-free, high value-added method for preparing sound-absorbing materials from waste circuit boards.

The present invention adopts one of the following technical solutions to solve the technical problems:

A device for preparing sound-absorbing materials from waste circuit boards, including a high-temperature and high-pressure reactor, a temperature controller, a pressure controller, a _CO2 gas cylinder, a _CO2 pressurization device, and a pressure relief device;

The high temperature and high pressure reactor is respectively connected with the temperature controller and the pressure controller;

The top of the high temperature and high pressure reactor is connected to the pressure relief device through a first pipeline; the bottom of the high temperature and high pressure reactor is connected to the _CO pressurizing device through a second pipeline;

One end of the _CO2 cylinder is connected to the pressure relief device, and the other end is connected to the _CO2 pressurization device;

Both the first pipeline and the second pipeline are provided with valves.

The present invention adopts the following technical solutions to solve the second technical problem:

A method for preparing sound-absorbing materials from waste circuit boards, the method needs to provide a device for preparing sound-absorbing materials from waste circuit boards as described above, specifically comprising the following steps:

Add waste circuit board non-metal enriched material and n-hexane into the high-temperature and high-pressure reactor, and the solid-liquid ratio is 1:1～1:8g/mL;

Close the reactor high-temperature and high-pressure reactor, heat up, and control the temperature to 180-280 degrees through a temperature controller;

Open the _CO2 cylinder and pressurize the _CO2 through the _CO2 pressurization device;

Then open the valve at the bottom of the high-temperature and high-pressure reactor to make high-pressure _CO2 pass into the high-temperature and high-pressure reactor. When the internal pressure of the high-temperature and high-pressure reactor reaches 3 to 10 MPa, immediately close the valve at the bottom of the high-temperature and high-pressure reactor, and control the reaction time to 10 to 30 minutes;

After the reaction, cool the high temperature and high pressure reactor to room temperature, then open the top valve of the high temperature and high pressure reactor, reduce the _CO2 to normal pressure through the pressure relief device and enter the _CO2 cylinder through the pipeline for recovery;

Open the high-temperature and high-pressure reactor, take out the reaction product for solid-liquid separation, and recover the n-hexane from the liquid phase product through a conventional rotary evaporation process;

The solid phase product obtained by separation is the sound-absorbing material product, which is used for the test of the sound absorption coefficient.

A method for preparing sound-absorbing materials from waste circuit boards, the method needs to provide a device for preparing sound-absorbing materials from waste circuit boards as described above, specifically comprising the following steps:

Add the waste circuit board non-metal enriched material and n-hexane into the high temperature and high pressure reactor, and the solid-liquid ratio is 1:8g/mL;

Close the reactor high-temperature and high-pressure reactor, heat up, and control the temperature to 230 degrees by a temperature controller;

Open the _CO2 cylinder and pressurize the _CO2 through the _CO2 pressurization device;

Then open the valve at the bottom of the high-temperature and high-pressure reactor to make high-pressure CO ₂ pass into the high-temperature and high-pressure reactor, and when the internal pressure of the high-temperature and high-pressure reactor reaches 7MPa, close the valve at the bottom of the high-temperature and high-pressure reactor immediately, and the reaction time is controlled as 20 minutes;

After the reaction, cool the high temperature and high pressure reactor to room temperature, then open the top valve of the high temperature and high pressure reactor, reduce the _CO2 to normal pressure through the pressure relief device and enter the _CO2 cylinder through the pipeline for recovery;

Open the high-temperature and high-pressure reactor, take out the reaction product for solid-liquid separation, and recover the n-hexane from the liquid phase product through a conventional rotary evaporation process;

The solid phase product obtained by separation is the sound-absorbing material product, which is used for the test of the sound absorption coefficient.

The advantage of the present invention is that: the present invention has developed an environmentally friendly method and device for preparing sound-absorbing materials from non-metallic enriched bodies of waste circuit boards with almost no secondary pollution, thereby realizing the high value-added resource recovery of non-metallic enriched bodies of waste circuit boards.

【Description of drawings】

The present invention will be further described below with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic diagram of the device structure of the present invention.

Fig. 2 is a schematic flow chart of the method of the present invention.

【Detailed ways】

As shown in Figure 1, a device for preparing sound-absorbing materials from waste circuit boards includes a high-temperature and high-pressure reactor 1, a temperature controller 2, a pressure controller 3, a _CO2 cylinder 4, a _CO2 pressurization device 5, and a pressure relief device 6. The high temperature and high pressure reactor 1 is respectively connected to the temperature controller 2 and the pressure controller 3; the top of the high temperature and high pressure reactor 1 is connected to the pressure relief device 6 through the first pipeline 7; the bottom of the high temperature and high pressure reactor 1 is connected to the _CO2 pressurizing device 5 through the second pipeline 8; the first pipeline 7 is provided with a valve 9; the second pipeline 8 is provided with a valve 10. One end of the _CO2 cylinder 4 is connected to the pressure relief device 6, and the other end is connected to the _CO2 pressurization device 5.

As shown in Figure 2, a method for preparing sound-absorbing materials from waste circuit boards uses the above-mentioned device for preparing sound-absorbing materials from waste circuit boards. For specific methods, see the following detailed specific examples:

First embodiment:

Add the waste circuit board non-metal enriched body and n-hexane into the high temperature and high pressure reactor 1, and the solid-liquid ratio is 1:8g/mL;

Close the reactor high temperature and high pressure reactor 1, heat up, and control the temperature to 230 degrees by the temperature controller 2;

Open the _CO2 gas cylinder 4, and pressurize _{the CO2 through} the CO2 pressurizing device 5;

Then open the valve 10 at the bottom of the high-temperature and high-pressure reactor 1 to make high-pressure CO ₂ pass into the high-temperature and high-pressure reactor 1, and when the internal pressure of the high-temperature and high-pressure reactor 1 reaches 3MPa, close the valve 10 at the bottom of the high-temperature and high-pressure reactor 1 immediately, and the reaction time is controlled to be 20 minutes;

After the reaction finishes, the high-temperature and high-pressure reactor 1 is cooled to room temperature, then the top valve 9 of the high-temperature and high-pressure reactor 1 is opened, and _the CO is reduced to normal pressure by the pressure relief device 6 and enters through a pipeline for CO _The cylinder 4 reclaims;

Open the high-temperature and high-pressure reactor 1, take out the reaction product for solid-liquid separation, and recover the n-hexane from the liquid phase product through a conventional rotary evaporation process.

The solid phase product obtained by separation is the sound-absorbing material product, which is used for the test of the sound absorption coefficient. The thickness of the product used for the sound absorption coefficient test is 20mm, the frequency range is 100-4000Hz, and the average sound absorption coefficient is 0.45.

Second embodiment:

Add waste circuit board non-metal enriched material and n-hexane into high temperature and high pressure reactor 1, and the solid-liquid ratio is 1:5g/mL;

Close the reactor high temperature and high pressure reactor 1, heat up, and control the temperature to 180 degrees by the temperature controller 2;

Open the _CO2 gas cylinder 4, and pressurize _{the CO2 through} the CO2 pressurizing device 5;

Then open the valve 10 at the bottom of the high-temperature and high-pressure reactor 1, so that high-pressure CO _is passed into the high-temperature and high-pressure reactor 1, and when the internal pressure of the high-temperature and high-pressure reactor 1 reaches 5MPa, close the valve 10 at the bottom of the high-temperature and high-pressure reactor 1 immediately, and the reaction time is controlled as 10 minutes;

After the reaction finishes, the high-temperature and high-pressure reactor 1 is cooled to room temperature, then the top valve 9 of the high-temperature and high-pressure reactor 1 is opened, and _the CO is reduced to normal pressure by the pressure relief device 6 and enters through a pipeline for CO _The cylinder 4 reclaims;

Open the high-temperature and high-pressure reactor 1, take out the reaction product for solid-liquid separation, and recover the n-hexane from the liquid phase product through a conventional rotary evaporation process.

The solid phase product obtained by separation is the sound-absorbing material product, which is used for the test of the sound absorption coefficient. The thickness of the product used for the sound absorption coefficient test is 20mm, the frequency range is 100-4000Hz, and the average sound absorption coefficient is 0.65.

Third embodiment:

Add the waste circuit board non-metal enriched body and n-hexane into the high temperature and high pressure reactor 1, and the solid-liquid ratio is 1:8g/mL;

Close the high temperature and high pressure reactor 1, heat up, and control the temperature to 230 degrees by the temperature controller 2;

Open the _CO2 gas cylinder 4, and pressurize _{the CO2 through} the CO2 pressurizing device 5;

Then open the valve 10 at the bottom of the high-temperature and high-pressure reactor 1 to make high-pressure CO ₂ pass into the high-temperature and high-pressure reactor 1, and when the pressure in the reactor reaches 7MPa, close the valve at the bottom of the high-temperature and high-pressure reactor immediately, and the reaction time control is 20 minutes;

After the reaction finishes, the high-temperature and high-pressure reactor 1 is cooled to room temperature, then the top valve 9 of the high-temperature and high-pressure reactor 1 is opened, and _the CO is reduced to normal pressure by the pressure relief device 6 and enters the CO through a pipeline _for gas cylinder recovery;

Open the high-temperature and high-pressure reactor 1, take out the reaction product and carry out solid-liquid separation, and the liquid phase product recovers normal hexane through a conventional rotary evaporation process;

The solid phase product obtained by separation is the sound-absorbing material product, which is used for the test of the sound absorption coefficient. The thickness of the product used for the sound absorption coefficient test is 20mm, the frequency range is 100-4000Hz, and the average sound absorption coefficient is 0.9.

Fourth embodiment:

Add the waste circuit board non-metal enriched body and n-hexane into the high temperature and high pressure reactor 1, and the solid-liquid ratio is 1:10g/mL;

Close the high temperature and high pressure reactor 1, heat up, and control the temperature to 280 degrees by the temperature controller 2;

Open the _CO2 gas cylinder 4, and pressurize _{the CO2 through} the CO2 pressurizing device 5;

Then open the valve 10 at the bottom of the high-temperature and high-pressure reactor 1 to make high-pressure CO ₂ pass into the high-temperature and high-pressure reactor 1, and when the internal pressure of the high-temperature and high-pressure reactor 1 reaches 10MPa, close the valve 10 at the bottom of the high-temperature and high-pressure reactor 1 immediately, and the reaction time is controlled to be 30 minutes;

After the reaction finishes, the high-temperature and high-pressure reactor 1 is cooled to room temperature, then the top valve 9 of the high-temperature and high-pressure reactor 1 is opened, and _the CO is reduced to normal pressure by the pressure relief device 6 and enters the CO through a pipeline _for gas cylinder recovery;

Open the high-temperature and high-pressure reactor 1, take out the reaction product and carry out solid-liquid separation, and the liquid phase product recovers normal hexane through a conventional rotary evaporation process;

The solid phase product obtained by separation is the sound-absorbing material product, which is used for the test of the sound absorption coefficient. The thickness of the product used for the sound absorption coefficient test is 20mm, the frequency range is 100-4000Hz, and the average sound absorption coefficient is 0.8.

The invention develops an environment-friendly method and device for preparing sound-absorbing materials from waste circuit board non-metal enriched bodies with almost no secondary pollution, thereby realizing the high value-added resource recovery of waste circuit board non-metal enriched bodies.

The above descriptions are only preferred implementation examples of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (2)

1. A method for preparing sound-absorbing material from discarded circuit boards, characterized in that: specifically comprises the steps: Add waste circuit board non-metal enriched material and n-hexane into the high-temperature and high-pressure reactor, and the solid-liquid ratio is 1:1~1:8g/mL; Close the high temperature and high pressure reactor of the reactor, raise the temperature, and control the temperature to 180~280 degrees through the temperature controller; Open the _CO2 cylinder and pressurize the _CO2 through the _CO2 pressurization device; Then open the valve at the bottom of the high-temperature and high-pressure reactor to allow high-pressure _CO2 to pass into the high-temperature and high-pressure reactor. When the internal pressure of the high-temperature and high-pressure reactor reaches 3 to 10 MPa, immediately close the valve at the bottom of the high-temperature and high-pressure reactor, and the reaction time is controlled to be 10 to 30 minutes; After the reaction, cool the high temperature and high pressure reactor to room temperature, then open the top valve of the high temperature and high pressure reactor, reduce the _CO2 to normal pressure through the pressure relief device and enter the _CO2 cylinder through the pipeline for recovery; Open the high-temperature and high-pressure reactor, take out the reaction product for solid-liquid separation, and recover the n-hexane from the liquid phase product through a conventional rotary evaporation process; The solid phase product obtained by separation is the sound-absorbing material product, which is used for the test of the sound absorption coefficient. 2. A method for preparing sound-absorbing materials from waste circuit boards, characterized in that: it specifically comprises the following steps: Add the waste circuit board non-metal enriched material and n-hexane into the high temperature and high pressure reactor, and the solid-liquid ratio is 1:8g/mL; Close the reactor high-temperature and high-pressure reactor, heat up, and control the temperature to 230 degrees by a temperature controller; Open the _CO2 cylinder and pressurize the _CO2 through the _CO2 pressurization device; Then open the valve at the bottom of the high-temperature and high-pressure reactor to make high-pressure CO ₂ pass into the high-temperature and high-pressure reactor, and when the internal pressure of the high-temperature and high-pressure reactor reaches 7MPa, close the valve at the bottom of the high-temperature and high-pressure reactor immediately, and the reaction time is controlled as 20 minutes; After the reaction, cool the high temperature and high pressure reactor to room temperature, then open the top valve of the high temperature and high pressure reactor, reduce the _CO2 to normal pressure through the pressure relief device and enter the _CO2 cylinder through the pipeline for recovery; Open the high-temperature and high-pressure reactor, take out the reaction product for solid-liquid separation, and recover the n-hexane from the liquid phase product through a conventional rotary evaporation process; The solid phase product obtained by separation is the sound-absorbing material product, which is used for the test of the sound absorption coefficient.