CN211972412U - Smelting system of circuit board - Google Patents
Smelting system of circuit board Download PDFInfo
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- CN211972412U CN211972412U CN202020653004.0U CN202020653004U CN211972412U CN 211972412 U CN211972412 U CN 211972412U CN 202020653004 U CN202020653004 U CN 202020653004U CN 211972412 U CN211972412 U CN 211972412U
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Abstract
The utility model provides a system of smelting of circuit board. This system of smelting includes: the device comprises a pyrolysis device, an oil-gas separation unit, a side-blown smelting device and an oxygen-enriched air blowing device. The pyrolysis device is a rotary pyrolysis furnace and is provided with a feed inlet, a jacket heating inlet, a pyrolysis flue gas outlet, a pyrolysis oil gas outlet and a pyrolysis residue outlet, and a circuit board is added through the feed inlet; the oil-gas separation unit is provided with a pyrolysis oil-gas inlet, a non-condensable gas outlet and a pyrolysis oil outlet, the pyrolysis oil-gas inlet is communicated with the pyrolysis oil-gas outlet, and the non-condensable gas outlet is communicated with the jacket heating inlet; the side-blown smelting device is provided with a pyrolysis residue inlet, a flux inlet, an oxygen-enriched air inlet, a smelting flue gas outlet, a crude copper outlet and a water quenching slag outlet, and the pyrolysis residue inlet is communicated with the pyrolysis residue outlet; and the oxygen-enriched air injection device is used for injecting oxygen-enriched air to the side-blown smelting device. The smelting system realizes the effects of no need of replenishing reducing agent and fuel and high-efficiency recovery of valuable metals in the using process.
Description
Technical Field
The utility model relates to a field is retrieved to useless circuit board particularly, relates to a system of smelting of circuit board.
Background
The middle energy-saving and Jiangxi Ruhling adopts an oxygen-enriched top-blown smelting method to treat the waste circuit board together with the copper-containing sludge, but in the process, a large amount of toxic gases such as black smoke and the like can be generated when the waste circuit board is directly smelted without pyrolysis.
The prior document (CN 108642286 a) provides a method for processing a circuit board, which comprises the following steps. The processing method comprises the following steps: cracking the circuit board to obtain cracked flue gas and solid slag; and performing side-blown smelting on the heavy metal sludge by using the pyrolysis flue gas as part of fuel in the side-blown smelting process of the heavy metal sludge. The process can generate a large amount of toxic gas such as black smoke, so the process has poor environmental protection.
The prior document (CN 108707750 a) provides an integrated treatment method for copper-containing sludge and circuit boards, which comprises the following steps: mixing and granulating copper-containing sludge and waste activated carbon to obtain copper-containing sludge particles; and carrying out side-blown smelting on the copper-containing sludge particles and the circuit board. The process utilizes the side-blown furnace to inject fuel for concurrent heating smelting, and a reducing agent is required to be added continuously.
The prior document (CN104878205A) singly smelts and recovers valuable metals in waste circuit boards, but the method does not clearly give the furnace type used by the method, and the smelting of the pyrolysis slag with carbon is not practical in production because the pyrolysis slag contains enough organic carbon.
On the basis, a method for processing the circuit board, which has good environmental protection performance, does not need to add fuel for heat compensation and does not need to add a reducing agent, is needed to be provided.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a system of smelting of circuit board to there is the problem that needs constantly to mend heat and extra addition reductant in the processing method to solving current to the circuit board.
In order to achieve the above object, the utility model provides a system of smelting of circuit board should be smelted the system and include: the device comprises a pyrolysis device, an oil-gas separation unit, a side-blown smelting device and an oxygen-enriched air injection device, wherein the pyrolysis device is a rotary pyrolysis furnace and is provided with a feed inlet, a jacket heating inlet, a pyrolysis flue gas outlet, a pyrolysis oil-gas outlet and a pyrolysis residue outlet, and a circuit board is added through the feed inlet; the oil-gas separation unit is provided with a pyrolysis oil-gas inlet, a non-condensable gas outlet and a pyrolysis oil outlet, the pyrolysis oil-gas inlet is communicated with the pyrolysis oil-gas outlet, and the non-condensable gas outlet is communicated with the jacket heating inlet and used for heat compensation; the side-blown smelting device is provided with a pyrolysis residue inlet, a flux inlet, an oxygen-enriched air inlet, a smelting flue gas outlet, a crude copper outlet and a water quenching slag outlet, and the pyrolysis residue inlet is communicated with the pyrolysis residue outlet; and the oxygen-enriched air injection device is used for injecting oxygen-enriched air to the side-blown smelting device so as to combust the pyrolysis residual carbon into carbon monoxide.
Further, the oil-gas separation unit comprises: the condensing device is provided with a pyrolysis oil gas inlet, a non-condensable gas outlet and a pyrolysis oil outlet, and the non-condensable gas outlet is communicated with the jacket heating inlet; and the inlet end of the oil storage device is communicated with the pyrolysis oil outlet.
Further, the smelting system also comprises a burner, wherein the burner is arranged at the jacket heating inlet and is used for burning the non-condensable gas.
Furthermore, the smelting system further comprises a flue gas purification unit, the flue gas purification unit is provided with a first flue gas inlet, and the first flue gas inlet is communicated with the pyrolysis flue gas outlet.
Further, the flue gas cleaning unit comprises: the system comprises a quenching device and an alkali absorption device, wherein the quenching device is provided with a first flue gas inlet and a cooling gas outlet; and the alkali absorption device is provided with a cooling gas inlet and a deacidification gas outlet, and the cooling gas inlet is communicated with the cooling gas outlet.
Further, the flue gas purification unit still includes adsorption equipment, and adsorption equipment's entry end and deacidification gas export intercommunication.
Further, the adsorption device is an activated carbon adsorption device.
Further, the smelting system comprises a pretreatment unit comprising a crushing device and a sorting device. The crushing device is provided with a circuit board inlet and a crushed material outlet, and the crushed material outlet is communicated with the feeding port; the sorting device is arranged on a flow path between the crushed material outlet and the feeding port to remove the entrainment in the circuit board.
Use the technical scheme of the utility model, when adopting above-mentioned system of smelting to carry out the independent processing to the circuit board, the pyrolysis treatment organic matter burns when can avoiding waste line board direct smelting and causes a large amount of pollutions, utilizes the noncondensable gas of gained to return pyrolysis device and realizes pyrolysis self-heating retrieval and utilization. Meanwhile, a large amount of residual carbon in the oxygen-enriched combustion pyrolysis residues supplies heat to a molten pool, and can be used as a reducing agent to efficiently recover valuable metals in the waste circuit board in a strong reducing atmosphere, so that the valuable components of the waste circuit board are fully recycled, and the environment-friendly production is realized. On the basis, the smelting system realizes the effects of no need of replenishing reducing agents and fuels and high-efficiency recovery of valuable metals in the using process.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic view of a melting system for a circuit board provided according to an exemplary embodiment of the present invention; and
fig. 2 shows a process flow diagram of a method for melting a circuit board provided in embodiment 1 of the present invention.
Wherein the figures include the following reference numerals:
10. a pre-processing unit; 11. a crushing device; 12. a sorting device; 20. a pyrolysis device; 30. an oil-gas separation unit; 31. a condensing unit; 32. an oil storage device; 40. a side-blown smelting unit; 50. a flue gas purification unit; 51. a quenching device; 52. an alkali absorption device; 53. an adsorption device; 60. an oxygen-enriched air blowing device; 70. a burner.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
As described in the background, the existing methods for processing circuit boards have the problems of requiring constant additional fuel heating and additional reducing agent addition. In order to solve the above technical problem, the present application provides a circuit board smelting system, as shown in fig. 1, the smelting system includes: the pyrolysis device 20, the oil-gas separation unit 30, the side-blown smelting device 40 and the oxygen-enriched air blowing device 60. The pyrolysis device 20 is a rotary pyrolysis furnace, and is provided with a feed inlet, a jacket heating inlet, a pyrolysis flue gas outlet, a pyrolysis oil gas outlet and a pyrolysis residue outlet, and a circuit board is added through the feed inlet; the oil-gas separation unit 30 is provided with a pyrolysis oil-gas inlet, a non-condensable gas outlet and a pyrolysis oil outlet, the pyrolysis oil-gas inlet is communicated with the pyrolysis oil-gas outlet, and the non-condensable gas outlet is communicated with the jacket heating inlet and used for heat compensation; the side-blown smelting device 40 is provided with a pyrolysis residue inlet, a flux inlet, an oxygen-enriched air inlet, a smelting flue gas outlet, a blister copper outlet and a water quenching slag outlet, wherein the pyrolysis residue inlet is communicated with the pyrolysis residue outlet; and an oxygen-enriched air injection device 60 for injecting oxygen-enriched air to the side-blown smelting device 40 to combust the pyrolysis residual carbon into carbon monoxide.
In the smelting system, organic components such as epoxy resin and the like in the circuit board are recovered through a pyrolysis device 20 to obtain pyrolysis oil gas, pyrolysis smoke and pyrolysis residues; introducing pyrolysis oil gas into the oil-gas separation unit 30 for oil-gas separation to obtain pyrolysis oil and non-condensable gas, and conveying the non-condensable gas into a jacket heating inlet of the pyrolysis device 20 through a feed inlet for combustion to provide heat for the pyrolysis device 20; and carrying out side-blown smelting on the pyrolysis residues and the oxygen-enriched air in a side-blown smelting device 40 to obtain crude copper, water quenching slag and second flue gas. In the side-blown smelting process, the pyrolysis residue contains a large amount of organic carbon and glass fiber, and the organic carbon can be used as fuel and can be fully combusted with oxygen-enriched air to supply heat. The oxygen-enriched air injection device 60 is used for injecting oxygen-enriched air to the side-blown smelting device 40 so as to combust pyrolytic carbon residue into carbon monoxide, which not only can provide heat for the side-blown smelting device 40, but also can maintain strong reducing atmosphere in the smelting tank. Under the strong reducing atmosphere, the organic carbon in the pyrolysis residue can also be used as a reducing agent to reduce metal oxides, so that the recovery rate of metal elements is improved; and carrying out slagging on the glass fiber.
The strong reducing atmosphere is a strong reducing atmosphere in a hearth of the side-blown smelting device 40, and preferably, the volume fraction of CO in the strong reducing atmosphere is 15-25%.
When the smelting system is adopted to independently treat the circuit board, the pyrolysis treatment can avoid a large amount of pollution caused by organic matter combustion when the waste circuit board is directly smelted, and the obtained non-condensable gas is returned to the pyrolysis device to realize pyrolysis self-heating recycling. Meanwhile, a large amount of residual carbon in the oxygen-enriched combustion pyrolysis residues supplies heat to a molten pool, and can be used as a reducing agent to efficiently recover valuable metals in the waste circuit board in a strong reducing atmosphere, so that the valuable components of the waste circuit board are fully recycled, and the environment-friendly production is realized. On the basis, the smelting system realizes the effects of no need of replenishing reducing agents and fuels and high-efficiency recovery of valuable metals in the using process.
The jacket heating inlet functions to heat a portion of the fuel (e.g., non-condensable gases) through the jacket and pass it to the pyrolysis unit 20.
In order to further improve the smelting efficiency of the side-blown smelting process and the recovery rate of the blister copper, the amount of the oxygen-enriched air which is 20 x 10 percent of the amount of 75 percent of the oxygen-enriched air which is blown into each ton of the pyrolysis slag is preferably 20 x 103Nm3～25×103Nm3。
In a preferred embodiment, as shown in FIG. 1, the oil gas separation unit 30 includes a condensing unit 31 and an oil storage unit 32. Condensing equipment 31 is provided with pyrolysis oil gas entry, noncondensable gas export and pyrolysis oil export, noncondensable gas export and charge door intercommunication, and oil storage device 32's entry end and pyrolysis oil export intercommunication. Because the temperature of condensation is different, therefore handle pyrolysis oil gas in condensing equipment 31, can separate noncondensable gas and pyrolysis oil to improve the security in the pyrolysis oil storage process. In order to further improve the separation degree between the pyrolysis oil and the non-condensable gas, it is more preferable that the above-mentioned condensing device 31 is a quenching device.
In a preferred embodiment, as shown in fig. 1, the smelting system further comprises a burner 70, the burner 70 being disposed at the jacket heating inlet for combusting the non-condensable gases. The non-condensable gases are first fed to a burner 70 for combustion before being fed to the jacket heating inlet, thereby generating a large amount of high temperature flue gas. The high temperature flue gas is then conveyed into the pyrolysis device 20 to supplement a large amount of heat energy for the pyrolysis process.
In a preferred embodiment, as shown in fig. 1, the smelting system further comprises a flue gas cleaning unit 50, and the flue gas cleaning unit 50 is provided with a first flue gas inlet which is communicated with the pyrolysis flue gas outlet. The flue gas purification unit 50 is favorable for removing dioxin, HBr, HCl and H in the first flue gas2S and the like, thereby being beneficial to improving the environmental protection of the smelting system.
The above-mentioned flue gas cleaning unit 50 may adopt a structure commonly used in the art. In a preferred embodiment, as shown in FIG. 1, the flue gas cleaning unit 50 comprises: a quenching device 51 and an alkali absorption device 52, wherein the quenching device 51 is provided with a first flue gas inlet and a cooling gas outlet; and the alkali absorption device 52 is provided with a cooling gas inlet and a deacidification gas outlet, and the cooling gas inlet is communicated with the cooling gas outlet.
The first flue gas is introduced into the quenching device 51, so that the generation of dioxin in the flue gas can be inhibited or even avoided, and then the alkali absorption device 52 is used for removing the acid gas in the first flue gas. Compared with other existing purification structures, the flue gas purification unit 50 adopting the structure is beneficial to further improving the purification degree of the first flue gas and is more environment-friendly.
In a preferred embodiment, as shown in fig. 1, the flue gas cleaning unit 50 further comprises an adsorption device 53, and an inlet end of the adsorption device 53 is communicated with the deacidification gas outlet. The inlet end of the adsorption device 53 is communicated with the deacidification gas outlet, so that the purification degree of the deacidification gas is further improved. In order to further increase the degree of purification of the deacidified gas, it is more preferable that the adsorption device 53 is an activated carbon adsorption device.
In a preferred embodiment, as shown in fig. 1, the smelting system includes a pretreatment unit 10, the pretreatment unit 10 including: the crushing device 11 is provided with a circuit board inlet and a crushed material outlet, and the crushed material outlet is communicated with the feeding port; the sorting device 12 is disposed in a flow path between the crushed material outlet and the feed inlet to remove entrained materials such as iron and magnetic components from the crushed material.
The circuit board can be crushed by the crushing device 11 to obtain crushed materials; then, the separator 12 can remove the iron and the magnetic components and other materials from the crushed material. More preferably, the sorting device 12 includes, but is not limited to, a magnetic separation device, a gravity separation device, or an air separation device.
In another aspect of the present application, there is provided a method for melting a circuit board, as shown in fig. 2, the method for melting includes: pyrolyzing the circuit board to obtain first flue gas, pyrolysis oil gas and pyrolysis residues; carrying out oil-gas separation on the pyrolysis oil gas to obtain noncondensable gas and pyrolysis oil, and burning the noncondensable gas again to supplement heat for the pyrolysis process; and carrying out side-blown smelting on the pyrolysis residues and oxygen-enriched air to obtain crude copper, second flue gas and water-quenched slag, controlling oxygen injection amount to enable carbon in the smelting tank to be combusted into CO, and maintaining strong reducing atmosphere in the smelting tank.
In the smelting method, organic components such as epoxy resin and the like in the circuit board are recovered through a pyrolysis process to obtain pyrolysis oil gas, first flue gas and pyrolysis residues; carrying out oil-gas separation on the pyrolysis oil gas to obtain pyrolysis oil and non-condensable gas, wherein the non-condensable gas returns to the pyrolysis process through a feed inlet to be combusted, so that heat is provided for the pyrolysis process; and carrying out side-blown smelting on the pyrolysis residues and oxygen-enriched air to obtain crude copper, water-quenched slag and second flue gas. In the side-blown smelting process, the pyrolysis residue contains a large amount of organic carbon and glass fiber, and the organic carbon can be used as fuel and can be fully combusted with oxygen-enriched air to supply heat. Meanwhile, the side-blown smelting process is in a strong reducing atmosphere by controlling the introduction amount of the oxygen-enriched air. Under the strong reducing atmosphere, the organic carbon in the pyrolysis residue can be used as a reducing agent to efficiently reduce the metal oxide in the circuit board; and carrying out slagging on the glass fiber.
When the circuit board is treated independently by adopting the smelting method, the pyrolysis treatment avoids a large amount of pollution caused by organic matter combustion when the waste circuit board is directly smelted, and the obtained pyrolysis gas is returned to the pyrolysis process to realize pyrolysis self-heating recycling. Meanwhile, a large amount of residual carbon in the oxygen-enriched combustion pyrolysis residues supplies heat to a molten pool, and can be used as a reducing agent to efficiently recover valuable metals in the waste circuit board under the strong reducing atmosphere, so that the valuable components of the waste circuit board are fully recycled, and the environment-friendly production is realized. On the basis, the smelting method achieves the effect that the reducing agent and the fuel do not need to be supplemented in the using process.
In a preferred embodiment, the oil and gas separation process comprises: and burning the non-condensable gas to obtain combustion gas, and conveying the combustion gas to a pyrolysis process for heat compensation. Before pyrolysis, the non-condensable gas is combusted to generate high-temperature flue gas containing a large amount of heat. The high-temperature flue gas returns to the pyrolysis process and can supplement a large amount of heat energy, thereby realizing pyrolysis self-heating recycling and reducing energy consumption.
In a preferred embodiment, the smelting process further comprises: and carrying out flue gas purification treatment on the first flue gas to obtain purified tail gas. The flue gas purification process is favorable for removing dioxin, HBr, HCl and H in the first flue gas2S and the like, thereby being beneficial to improving the environmental protection of the smelting method.
Preferably, the flue gas cleaning process comprises: quenching the first flue gas to obtain cooling gas; and introducing the cooling gas into the alkaline solution to obtain the deacidified gas. The first flue gas is quenched to prevent dioxin from being generated, and then the first flue gas is introduced into an alkaline solution to facilitate removal of acid gas in the first flue gas. Compared with other existing purification methods, the adoption of the flue gas purification method is beneficial to further improving the purification degree of the first flue gas.
In a preferred embodiment, the flue gas cleaning process further comprises: the deacidified gas is treated in an adsorption unit 53 to remove impurities from the deacidified gas. The adsorption of the deacidification gas by the adsorption device 53 is favorable for further improving the purification degree of the deacidification gas. More preferably, the adsorption device 53 is an activated carbon adsorption device.
In a preferred embodiment, the temperature of the pyrolysis process is 450-600 ℃, and the holding time is 0.5-1.5 h. Compared with other ranges, the temperature and the heat preservation time of the pyrolysis process are limited in the range, so that the full pyrolysis degree of the pyrolysis process of the circuit board is further improved, the yield of pyrolysis oil gas is improved, and the waste circuit board is further fully carbonized.
In a preferred embodiment, the temperature of the side-blown smelting process is 1250-1350 ℃, and the smelting slag is SiO2-Al2O3A quaternary slag system of-CaO-FeO, wherein CaO/SiO2＝0.4～1.3，Al2O3/SiO20.21-0.4 percent, and less than 20 percent of FeO. Controlling the amount of oxygen-enriched air blown by 75 percent of each ton of pyrolysis slag to be 20 multiplied by 103Nm3～25×103Nm3. The temperature of the side-blown smelting process includes, but is not limited to, the above range, and limiting the temperature within the above range is beneficial for further improving the recovery efficiency of blister copper in the circuit board.
In a preferred embodiment, the smelting process further comprises, prior to performing the pyrolysis process: sequentially crushing and magnetically sorting the circuit board; crushing the circuit board to obtain crushed materials; then, organic components, glass fibers and valuable metals in the circuit board can be sorted out through magnetic sorting, and meanwhile, entrainment objects such as iron, magnetic components and the like in the crushed materials are removed. More preferably, the crushing granularity in the crushing process is 20-30 mm. More preferably, the above sorting process includes, but is not limited to, magnetic separation, gravity separation, or air separation.
The present application is described in further detail below with reference to specific examples, which should not be construed as limiting the scope of the invention as claimed.
Example 1
The smelting system shown in the attached figure 1 is adopted to treat the circuit board, and the process flow is shown in figure 2.
The smelting method of the circuit board comprises the following steps:
crushing the waste circuit board in a crushing device 11 to obtain crushed materials, wherein the particle size of the crushed materials is 10-30 mm; the crushed aggregates are physically sorted (magnetically separated) in a sorting device 12 to remove the entrainment such as iron, aluminum fins or other components in the crushed aggregates.
And adding the sorted materials into a pyrolysis device 20 (a pyrolysis furnace), heating to 450 ℃, preserving heat for 1.5h, and performing low-temperature pyrolysis to obtain first flue gas, pyrolysis oil gas and pyrolysis residues.
And (3) conveying the pyrolysis oil gas to a condensing device 31 (a condensing pipe) to cool to normal temperature for oil-gas separation to obtain 20% pyrolysis oil, 15% non-condensable gas and 65% pyrolysis residue remained in the furnace. The non-condensable gas is fully combusted in the combustor to generate high-temperature flue gas, and then the high-temperature flue gas is returned to the pyrolysis device 20 (a pyrolysis furnace) for heat supplement, so that self-heating recycling is realized. The temperature of the first flue gas generated by the pyrolysis device 20 (pyrolysis furnace) is maintained at more than 800 ℃, and then the first flue gas is quenched by a quenching device 51, deacidified by an alkali absorption device 52, and absorbed by an absorption device 53 (activated carbon absorption device) in sequence to remove dioxin, HBr, HCl and H2S and other harmful components; the pyrolysis oil is stored in the oil storage 33 for standby or takeout.
The pyrolysis residue is added into a side-blown smelting device 40 (side-blown converter), a large amount of organic carbon in the pyrolysis residue is used as fuel, and simultaneously oxygen-enriched air (oxygen concentration is 75 percent), oxygen-enriched air is blown into the side-blown smelting device 40 (side-blown converter) through an oxygen-enriched air blowing device 60, and the oxygen-enriched air amount required by each ton of pyrolysis residue is 20 multiplied by 103Nm3) The pyrolysis residue is fully combusted to supply heat to the pyrolysis residue to produce blister copper and slag, and the smelting slag is SiO2-Al2O3-CaO-FeO quaternary slag system; wherein in the slag, CaO/SiO2In a weight ratio of 0.4, Al2O3/SiO2The weight ratio of (A) is 0.21, the weight percentage content of FeO is 18%, and the melting temperature is 1350 ℃. After smelting, the blister copper contains 98.63 wt% of copper, the copper recovery rate is 95.87 wt%, and the smoke gas is discharged after reaching the standard after being subjected to waste heat recovery and smoke gas treatment.
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the smelting system is adopted to carry out independent treatment on the circuit board, so that the effects of no need of replenishing reducing agent and fuel and high-efficiency recovery of valuable metals are achieved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A melting system for a circuit board, the melting system comprising:
the pyrolysis device (20) is a rotary pyrolysis furnace and is provided with a feed inlet, a jacket heating inlet, a pyrolysis flue gas outlet, a pyrolysis oil gas outlet and a pyrolysis residue outlet, and the circuit board is added through the feed inlet;
the oil-gas separation unit (30), the oil-gas separation unit (30) is provided with a pyrolysis oil-gas inlet, a non-condensable gas outlet and a pyrolysis oil outlet, the pyrolysis oil-gas inlet is communicated with the pyrolysis oil-gas outlet, and the non-condensable gas outlet is communicated with the jacket heating inlet and used for supplementing heat;
the side-blown smelting device (40), the side-blown smelting device (40) is provided with a pyrolysis residue inlet, a flux inlet, an oxygen-enriched air inlet, a smelting flue gas outlet, a crude copper outlet and a water quenching slag outlet, and the pyrolysis residue inlet is communicated with the pyrolysis residue outlet; and
and the oxygen-enriched air injection device (60) is used for injecting oxygen-enriched air to the side-blown smelting device (40) so as to combust the pyrolysis residual carbon into carbon monoxide.
2. Smelting system for circuit boards according to claim 1, characterized in that the oil-gas separation unit (30) comprises:
the condensing device (31) is provided with a pyrolysis oil gas inlet, the non-condensable gas outlet and a pyrolysis oil outlet, and the non-condensable gas outlet is communicated with the jacket heating inlet; and
an inlet end of the oil storage device (32) is communicated with the pyrolysis oil outlet.
3. Smelting system for a circuit board according to claim 1, further comprising a burner (70), said burner (70) being arranged at the jacket heating inlet for burning the non-condensable gasses.
4. Smelting system for a circuit board according to claim 2 or 3, further comprising a flue gas cleaning unit (50), said flue gas cleaning unit (50) being provided with a first flue gas inlet, said first flue gas inlet being in communication with said pyrolysis flue gas outlet.
5. Smelting system for circuit boards according to claim 4, wherein the flue gas cleaning unit (50) comprises:
a quench device (51), said quench device (51) being provided with said first flue gas inlet and a cooling gas outlet; and
the alkali absorption device (52), the alkali absorption device (52) is provided with a cooling gas inlet and a deacidification gas outlet, and the cooling gas inlet is communicated with the cooling gas outlet.
6. Smelting system for a circuit board according to claim 5, wherein the flue gas cleaning unit (50) further comprises an adsorption device (53), the inlet end of the adsorption device (53) being in communication with the deacidification gas outlet.
7. Smelting system for circuit boards according to claim 6, characterized in that the adsorption device (53) is an activated carbon adsorption device.
8. Smelting system for circuit boards according to claim 7, characterized in that the smelting system comprises a pre-treatment unit (10), the pre-treatment unit (10) comprising:
the crushing device (11) is provided with a circuit board inlet and a crushed material outlet, and the crushed material outlet is communicated with the feeding port;
a sorting device (12), the sorting device (12) being arranged in a flow path between the crushed material outlet and the feed opening to remove material entrained in the circuit board.
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| CN202020653004.0U CN211972412U (en) | 2020-04-26 | 2020-04-26 | Smelting system of circuit board |
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| CN202020653004.0U CN211972412U (en) | 2020-04-26 | 2020-04-26 | Smelting system of circuit board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111411236A (en) * | 2020-04-26 | 2020-07-14 | 中国恩菲工程技术有限公司 | Circuit board smelting system and smelting method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111411236A (en) * | 2020-04-26 | 2020-07-14 | 中国恩菲工程技术有限公司 | Circuit board smelting system and smelting method |
| CN111411236B (en) * | 2020-04-26 | 2024-04-05 | 中国恩菲工程技术有限公司 | Smelting system and smelting method of circuit board |
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