CN210773069U - PCB membrane sediment minimizing processing system based on microwave thermal dehydration - Google Patents
PCB membrane sediment minimizing processing system based on microwave thermal dehydration Download PDFInfo
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- CN210773069U CN210773069U CN201921609133.3U CN201921609133U CN210773069U CN 210773069 U CN210773069 U CN 210773069U CN 201921609133 U CN201921609133 U CN 201921609133U CN 210773069 U CN210773069 U CN 210773069U
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Abstract
The utility model discloses a PCB membrane sediment minimizing processing system based on microwave thermal dehydration, include: a feeding system: used for conveying PCB film slag, the microwave processing system: and the discharge end of the feeding system is connected with the PCB film residue, and the water vapor recovery system is used for performing microwave treatment on the PCB film residue: and the water vapor output end of the microwave treatment system is connected with the membrane slag recovery system and is used for recovering the water vapor generated in the microwave treatment system: and the membrane slag output end of the microwave treatment system is connected with the membrane slag output end of the microwave treatment system and used for recovering the membrane slag generated in the microwave treatment system, and the control system is used for: and the system is used for controlling the work of the feeding system, the microwave treatment system, the water vapor recovery system and the film slag recovery system. The technical scheme of the utility model improves the dehydration efficiency and the dehydration effect of PCB membrane sediment, reduces the treatment cost.
Description
Technical Field
The utility model relates to a PCB membrane sediment processing technology field, in particular to PCB minimizing processing system based on microwave thermal dehydration.
Background
The solid waste residue generated in the film removing process in the manufacturing process of the Printed Circuit Board (PCB) is the PCB film residue. The PCB film slag is overall viscose, has higher viscosity and poorer water permeability, the water content of the PCB film slag is more than 60 percent, the surface of the PCB film slag is easy to crust, and the internal water cannot volatilize. PCB film residues are listed in national hazardous waste records, and cannot be processed by enterprises. If the qualified treatment manufacturer is directly entrusted with incineration treatment without dehydration treatment, the outsourcing treatment cost is seriously influenced, the operation cost of enterprises is increased, and the total amount control of the government environmental protection departments on the dangerous wastes of the enterprises cannot be met.
The existing membrane slag reduction treatment system and method generally adopt centrifugal dehydration, spiral extrusion dehydration and acidification-filter pressing dehydration, the water quantity removed by the dehydration mode is limited, membrane slag obtained after dehydration still contains a small amount of water, the dehydration efficiency is low, the dehydration effect is poor, and the cost of the final membrane slag outsourcing treatment is still high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a PCB minimizing processing system based on microwave thermal dehydration aims at improving the dehydration efficiency and the dehydration effect of PCB membrane sediment, reduces treatment cost.
In order to achieve the above object, the utility model provides a PCB membrane sediment minimizing processing system based on microwave thermal dehydration, include:
a feeding system: is used for conveying the PCB film residues,
a microwave processing system: the microwave treatment system comprises a reaction cavity, a conveying device for conveying the PCB film residues is arranged in the reaction cavity, at least one microwave generating device for performing microwave treatment on the PCB film residues and at least one temperature transmitter for detecting the temperature in the reaction cavity are also arranged in the reaction cavity,
a water vapor recovery system: is connected with the vapor output end of the microwave processing system and is used for recovering the vapor generated in the microwave processing system,
membrane slag recovery system: is connected with the membrane slag output end of the microwave processing system and is used for recovering the membrane slag generated in the microwave processing system,
the control system comprises: and the water vapor recovery system is in control connection with the feeding system, the microwave treatment system, the water vapor recovery system and the membrane slag recovery system and is used for controlling the feeding system, the microwave treatment system, the water vapor recovery system and the membrane slag recovery system to work.
Preferably, the feeding system comprises a bucket elevator, a weighing belt feeder and a feeding hopper which are sequentially connected, and a double-screw propeller is arranged in the feeding hopper; the weighing belt feeder is connected with the feed hopper through a first pneumatic gate valve, and the feed hopper is connected with the microwave treatment system through a second pneumatic gate valve.
Preferably, the membrane slag conveying device comprises a spiral propeller arranged along the length direction of the reaction cavity, a plurality of microwave generating devices are arranged above the reaction cavity along the propelling direction of the spiral propeller, and a plurality of temperature transmitters are arranged between the microwave generating devices.
Preferably, the water vapor recovery system comprises a first condenser and a second condenser which are sequentially connected, an exhaust port of the first condenser is communicated with the second condenser through a vacuum pump, and an exhaust port of the second condenser is connected with an external waste gas recovery system; the water outlets of the first condenser and the second condenser are communicated with a condensed water tank through a condensed water pump.
Preferably, the membrane slag recovery system comprises a discharge hopper, the feed end of the discharge hopper is connected with the membrane slag output end of the microwave treatment system through a third pneumatic gate valve, the discharge end of the discharge hopper is connected with the feed end of a scraper conveyor through a manual gate valve, a rotary discharge valve and a weightless scale in sequence, and the discharge end of the scraper conveyor is connected with an automatic packing machine; the device comprises a discharge hopper, a radar charge level indicator, a vacuum release valve, a rotation-resistant charge level indicator and a nitrogen protection device are installed on the side wall of the discharge hopper, an air cannon and a vibrator are installed at the bottom of the discharge hopper, and a weighing scale used for weighing is further installed in the discharge hopper.
Compared with the prior art, the beneficial effects of the utility model are that: the characteristics of gummy PCB film residues, poor water permeability, easy incrustation on the surface and incapability of volatilizing internal moisture are characterized in that the PCB film residues are dehydrated by adopting the microwave heating principle and the main characteristics, the dehydration efficiency is high, the dehydration effect is good, acidification is not needed, and secondary pollution is avoided. After the PCB film slag is subjected to reduction treatment, the burning is more convenient, the commission treatment cost can be saved, the pollution to the environment is reduced to a great extent, and the purpose of win-win economic benefit and environmental protection is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a structural diagram of the PCB film slag reduction treatment system of the utility model;
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
Referring to fig. 1, fig. 1 is a structural diagram of a PCB film residue reduction processing system of the present invention;
the PCB film residue reduction processing system based on microwave thermal dehydration that this embodiment provided includes:
a feeding system: is used for conveying the PCB film residues,
a microwave processing system: is connected with the discharge end of the feeding system and is used for carrying out microwave treatment on the PCB film slag, the microwave treatment system comprises a reaction cavity 21, a conveying device 22 for conveying the PCB film slag is arranged in the reaction cavity 21, at least one microwave generating device 23 for carrying out microwave treatment on the PCB film slag and at least one temperature transmitter 24 for detecting the temperature in the reaction cavity 21 are also arranged in the reaction cavity 21,
a water vapor recovery system: is connected with the vapor output end of the microwave processing system and is used for recovering the vapor generated in the microwave processing system,
membrane slag recovery system: is connected with the membrane slag output end of the microwave processing system and is used for recovering the membrane slag generated in the microwave processing system,
the control system comprises: and the water vapor recovery system is in control connection with the feeding system, the microwave treatment system, the water vapor recovery system and the membrane slag recovery system and is used for controlling the feeding system, the microwave treatment system, the water vapor recovery system and the membrane slag recovery system to work. It should be noted that the control system is a PLC control system commonly used in the prior art, and controls the normal operation of the whole processing system by inputting a program.
Further, the feeding system comprises a bucket elevator 11, a weighing belt feeder 12 and a feeding hopper 13 which are connected in sequence, and a pair of screw propellers 14 are arranged in the feeding hopper 13; the weighing belt feeder 12 is connected with the feeding hopper 13 through a first pneumatic gate valve 15, and the feeding hopper 13 is connected with the microwave processing system through a second pneumatic gate valve 16.
Further, the membrane slag conveying device 22 comprises a spiral propeller arranged along the length direction of the reaction cavity 21, a plurality of microwave generating devices 23 are arranged above the reaction cavity 21 along the propelling direction of the spiral propeller, and a plurality of temperature transmitters 24 are arranged between the microwave generating devices 23. The microwave generating device 23 is a microwave generator commonly used in the prior art, the double-helix propeller 14 and the helical propeller are both connected to the driving end of the driving device, and the driving device is a driving motor. It should be noted that the microwave heating technique is a technique for transmitting energy to the inside of an object to be heated by electromagnetic waves to heat the object to a desired level for production. The commonly used microwave frequencies are 915MHz and 2450 MHz. The polar molecules in the substance are changed from the original random arrangement to the arrangement according to the polar direction of the electric field in the electromagnetic field, under the action of microwaves, the arrangement movement is continuously changed at the frequency of billions of times per second, the molecules generate violent movement and collision friction, thereby generating heat, converting electric energy into heat energy in the substance and continuously increasing the temperature of the substance.
Further, the water vapor recovery system comprises a first condenser 31 and a second condenser 32 which are connected in sequence, wherein an exhaust port of the first condenser 31 is communicated with the second condenser 32 through a vacuum pump 33, and an exhaust port of the second condenser 32 is connected with an external waste gas recovery system; the water outlets of the first condenser 31 and the second condenser 32 are communicated with a condensed water tank 35 through a condensed water pump 34.
Further, the membrane slag recovery system comprises a discharge hopper 41, the feed end of the discharge hopper 41 is connected with the membrane slag output end of the microwave treatment system through a third pneumatic gate valve 42, the discharge end of the discharge hopper 41 is connected with the feed end of a scraper conveyor 46 through a manual gate valve 43, a rotary discharge valve 44 and a weightlessness scale 45 in sequence, and the discharge end of the scraper conveyor 46 is connected with an automatic packing machine 47; the top of the discharge hopper 41 is also provided with a radar level gauge 48 and a vacuum release valve 49, the side wall of the discharge hopper 41 is provided with a rotation-resistant level gauge 410 and a nitrogen protection device 411, the bottom of the discharge hopper 41 is provided with an air cannon 412 and a vibrator 413, and the interior of the discharge hopper 41 is also provided with a weighing scale 414 for weighing.
Specifically, after the PCB film residues are conveyed to a weighing belt feeder 12 through a bucket elevator 11 for accurate measurement, a first pneumatic gate valve 15 is opened, and the PCB film residues are conveyed into a feed hopper 13. Through the accurate measurement of the weighing belt feeder 12, the PCB film residues added into the feed hopper 13 can be effectively controlled, and the PCB film residues in the feed hopper 13 are prevented from exceeding the rated capacity. And closing the first pneumatic gate valve 15, opening the second pneumatic gate valve 16, starting the driving device, pushing the PCB film residues in the feed hopper 13 into the reaction cavity 21 by the double-helix propeller 14, and pushing the PCB film residues along the length direction of the reaction cavity 21 by the double-helix propeller. At this time, the microwave generating device 23 is started to change the moisture in the PCB film residues into water vapor, the temperature in the reaction cavity 21 is detected by the temperature transmitter 24 and is remotely transmitted to the PLC system, the power of the microwave generating device 23 is automatically controlled, and the temperature of microwave heating is adjusted. It should be noted that the temperature in the reaction chamber 21 is controlled and adjusted by the PLC control system to adjust the power of the microwave generator 23 and the rotation speed of the driving device, so as to control the temperature of the area in the reaction chamber 21 within the range of 50 ℃ to 180 ℃, and the residence time of the PCB film residues in the reaction chamber 21 is maintained for 3min to 15 min.
The water vapor generated in the microwave processing system enters the water vapor recovery system through the water vapor output end, the water vapor firstly enters the first condenser 31 for condensation, and the condensed water is recovered to the condensed water tank 35 through the condensed water pump 34. The residual gas in the first condenser 31 enters the second condenser 32 through the vacuum pump 33 for secondary condensation, the condensed water after the secondary condensation is recycled to the condensed water tank 35 through the condensed water pump 34, and the residual gas after the secondary condensation is discharged to an external waste gas treatment system for treatment.
In the process of pushing the PCB film residues forwards by the internal spiral propeller of the reaction cavity 21, the third pneumatic gate valve 42 is normally opened, the PCB film residues enter the discharge hopper 41, the radar level gauge 48 is arranged at the top of the discharge hopper 41 to continuously monitor the material level, and the vacuum release valve 49 protects the discharge hopper 41 from being influenced by excessive positive pressure and negative pressure when the air pressure is abnormal. When the material level in the discharging hopper 41 is too high or too low, the rotation-resisting level indicator 410 on the side wall automatically alarms and transmits the alarm to the PLC control system. The air cannon 412 and the vibrator 413 at the bottom of the discharge hopper 41 can effectively prevent the PCB film residues from adhering to the wall and blocking the discharge hole due to hardening. When the temperature in the discharging hopper 41 is too high, the nitrogen protection device 411 can be opened.
When the storage space of the discharge hopper 41 is insufficient, the metering scale 414 is started, the weight of the discharged PCB film residue is measured for the time, the manual gate valve 43 is opened, the rotary discharge valve 44 is started, the PCB film residue enters the weightlessness scale 45 for secondary metering, and the PCB film residue after secondary metering enters the automatic packaging machine 47 through the scraper conveyor 46 to be packaged.
The present invention will be further explained with reference to the following embodiments:
treating PCB film residues with the water content of 60%, heating and dehydrating the PCB film residues with the output power of 1000W and the frequency of 2.45GHz by using a microwave generating device 23, controlling the temperature of the area in the reaction cavity 21 within the range of 50-180 ℃, and keeping the retention time of the PCB film residues in the reaction cavity 21 for 3-5 min; specifically, in this embodiment, the number of the microwave generators 23 is three, the microwave generators are sequentially installed along the propulsion direction of the auger, the number of the temperature transmitters 24 is two, and the two temperature transmitters are respectively installed between the first microwave generator 23 and the second microwave generator 23, and behind the third microwave generator 23, the reaction cavity 21 is divided into two areas, the first area is provided with the first microwave generator 23, the second area is provided with the second microwave generator 23 and the third microwave generator 23, wherein the temperature of the first area is controlled to be 50-100 ℃, the residence time of the PCB film residues in the first area is kept for 3min, the temperature of the second area is controlled to be 180 ℃, and the residence time of the PCB film residues in the first area is kept for 2 min; and finally, analyzing the water content of the PCB film residue by taking the dehydrated PCB film residue sample to be 5%.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (5)
1. A PCB membrane sediment minimizing processing system based on microwave thermal dehydration which characterized in that includes:
a feeding system: is used for conveying the PCB film residues,
a microwave processing system: the microwave treatment system comprises a reaction cavity, a conveying device for conveying the PCB film residues is arranged in the reaction cavity, at least one microwave generating device for performing microwave treatment on the PCB film residues and at least one temperature transmitter for detecting the temperature in the reaction cavity are also arranged in the reaction cavity,
a water vapor recovery system: is connected with the vapor output end of the microwave processing system and is used for recovering the vapor generated in the microwave processing system,
membrane slag recovery system: is connected with the membrane slag output end of the microwave processing system and is used for recovering the membrane slag generated in the microwave processing system,
the control system comprises: and the water vapor recovery system is in control connection with the feeding system, the microwave treatment system, the water vapor recovery system and the membrane slag recovery system and is used for controlling the feeding system, the microwave treatment system, the water vapor recovery system and the membrane slag recovery system to work.
2. The PCB film slag reduction treatment system based on microwave thermal dehydration of claim 1, wherein the feeding system comprises a bucket elevator, a weighing belt feeder and a feeding hopper which are connected in sequence, and a double-screw propeller is arranged in the feeding hopper; the weighing belt feeder is connected with the feed hopper through a first pneumatic gate valve, and the feed hopper is connected with the microwave treatment system through a second pneumatic gate valve.
3. The PCB film slag reduction processing system based on microwave thermal dehydration of claim 1, wherein the film slag conveying device comprises a spiral propeller installed along the length direction of the reaction cavity, a plurality of microwave generating devices are installed above the reaction cavity along the propelling direction of the spiral propeller, and a temperature transmitter is installed between the plurality of microwave generating devices.
4. The microwave thermal dehydration-based PCB film residue reduction processing system of claim 1, wherein the water vapor recovery system comprises a first condenser and a second condenser which are connected in sequence, the exhaust port of the first condenser is communicated with the second condenser through a vacuum pump, and the exhaust port of the second condenser is connected with an external waste gas recovery system; the water outlets of the first condenser and the second condenser are communicated with a condensed water tank through a condensed water pump.
5. The microwave thermal dehydration-based PCB film slag reduction processing system of claim 1, wherein the film slag recovery system comprises a discharge hopper, the feed end of the discharge hopper is connected with the film slag output end of the microwave processing system through a third pneumatic gate valve, the discharge end of the discharge hopper is connected with the feed end of a scraper conveyor through a manual gate valve, a rotary discharge valve and a weightless scale in sequence, and the discharge end of the scraper conveyor is connected with an automatic packing machine; the device comprises a discharge hopper, a radar charge level indicator, a vacuum release valve, a rotation-resistant charge level indicator and a nitrogen protection device are installed on the side wall of the discharge hopper, an air cannon and a vibrator are installed at the bottom of the discharge hopper, and a weighing scale used for weighing is further installed in the discharge hopper.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921609133.3U CN210773069U (en) | 2019-09-25 | 2019-09-25 | PCB membrane sediment minimizing processing system based on microwave thermal dehydration |
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| CN201921609133.3U CN210773069U (en) | 2019-09-25 | 2019-09-25 | PCB membrane sediment minimizing processing system based on microwave thermal dehydration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530114A (en) * | 2019-09-25 | 2019-12-03 | 深圳市星河环境技术有限公司 | A kind of PCB film slag reduction treatment system and method based on microwave heat dehydration |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530114A (en) * | 2019-09-25 | 2019-12-03 | 深圳市星河环境技术有限公司 | A kind of PCB film slag reduction treatment system and method based on microwave heat dehydration |
| CN110530114B (en) * | 2019-09-25 | 2024-01-02 | 深圳星河环境股份有限公司 | PCB film residue reduction treatment system and method based on microwave thermal dehydration |
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Address after: 518000 101, maozhouhe industrial complex, Langxia community, Songgang street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Xinghe environment Co.,Ltd. Address before: No.01-03, B2 / F, building 2, Shenzhen Bay science and technology ecological park, 1809 Shahe West Road, high tech community, Yuehai street, Nanshan District, Shenzhen, Guangdong 518000 Patentee before: SHENZHEN STARIVER ENVIRONMENT TECHNOLOGY Co.,Ltd. |