CN204058560U - The supercritical water treatment device of discarded circuit board - Google Patents

The supercritical water treatment device of discarded circuit board Download PDF

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CN204058560U
CN204058560U CN201420504783.2U CN201420504783U CN204058560U CN 204058560 U CN204058560 U CN 204058560U CN 201420504783 U CN201420504783 U CN 201420504783U CN 204058560 U CN204058560 U CN 204058560U
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reactor
heat exchanger
pipeline
circuit board
water
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彭英利
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Abstract

The utility model relates to a kind of supercritical water treatment device of discarded circuit board, it is characterized in that, includes: stirring-type, to batch can, is uniformly mixed container as the crushed material of discarded circuit board and water and alkaline additive; Diaphragm type high-pressure pump, for pressurizeing mixture; Vapor heat exchanger, the high-temperature steam utilizing reactor to export carries out steam heating to the mixture sent into, and gas heating and separating gone out and water vapor are discharged from top, are discharged by isolated oil fuel from bottom; Well heater, sends into reactor after carrying out second-heating to the material exported; Oxygen supply/hydrogen supply machine, for reactor provides oxygen needed for reaction or hydrogen; And reactor, for making water in material produce supercritical state, fuse with material, and burn under the catalysis of oxygen or hydrogen, realize being separated and recovery of rare metal and non-ferrous metal.The utility model compact construction, efficiency are high, process is thorough, discharge does not have secondary pollution, applied widely.

Description

The supercritical water treatment device of discarded circuit board
Technical field
The utility model relates to a kind of discarded circuit board treatment unit, specifically a kind of supercritical water treatment device of discarded circuit board.
Background technology
Supercritical Water Oxidation Technology has benefited from the overcritical performance of water, and under high-temperature high-pressure state, the physicals of water is especially completely different under solubility property and normal temperature, and this state is called as supercritical state.In the supercritical state, water has very high dissolving power to organism as highdensity gas, can dissolve each other completely with most of organic gas and CO etc., but mineral compound especially salt be insoluble in wherein.In addition, supercritical water has higher spread coefficient and lower viscosity.These overcritical performances above-mentioned add higher temperature and pressure makes water become the perfect medium of Organic oxidation reaction.
Supercritical Water Oxidation Technology, compared with other treatment technologies, has obvious advantage: (1) efficiency is high, and thoroughly, the clearance rate of toxic substance is up to more than 99. 99% in process; (2) speed of response is fast, and the residence time is short, and structure of reactor is simple, and volume is little; (3) wide accommodation, goes for the process of various toxic substance wastewater and waste materials; (4) do not have secondary pollution, do not need further process, and inorganic salt can be separated from water, the waste water after process can be recycled completely; (5) when organic content is more than 10%, do not need additional heat, realize heat self-sufficiency.
The method in the past processing the band components and parts wiring board of waste computer, mobile phone etc. is: one, adopt and entirely carbonize process, and be namely placed in and fill nitrogen carbonizing apparatus after electrothermal high-temperature decomposition charing, residual metallic uses mechanical separation out; Two, combined separation mechanism is used, after discarded circuit board (band element) entirety is pulverized, through magnetic separation, electrostatic separation, proportion separation etc., the most of metal in wiring board and components and parts and the organism such as resin, weighting material and inorganics are separated again, form the many clipped wires of Combination and lightweight and heavy organic impurity etc.The defect of these treatment processs is, disposable process is incomplete, and in raw material, contained various metals can not get effective separation and recycling.The material reclaimed needs again or repeatedly could refine a small amount of rare precious metal such as copper, gold, iron, tin, aluminium and non-ferrous metal with the method for pyrometallurgical smelting or chemistry refinement, cause multiple rare precious metal and non-ferrous metal to can not get being separated and reclaiming, make productivity effect not good.
Utility model content
The purpose of this utility model is just to provide a kind of supercritical water treatment device of discarded circuit board, to solve the problem that incomplete, the multiple rare precious metal of existing processing mode process and non-ferrous metal can not get effectively being separated and recycling.
The utility model is achieved in that a kind of supercritical water treatment device of discarded circuit board, and its structure includes:
Stirring-type, to batch can, is connected with diaphragm type high-pressure pump by pipeline, is uniformly mixed container as the crushed material of discarded circuit board and water and alkaline additive;
Diaphragm type high-pressure pump, is connected to batch can and vapor heat exchanger with stirring-type respectively by pipeline, sends into vapor heat exchanger for the mixture pressurization exported to batch can by stirring-type;
Vapor heat exchanger, connected with diaphragm type high-pressure pump, well heater and reactor respectively by pipeline, the high-temperature steam utilizing reactor to export carries out steam heating to the mixture sent into through the pressurization of diaphragm type high-pressure pump, and gas heating and separating gone out and water vapor are discharged from the top of vapor heat exchanger, the bottom of isolated oil fuel from vapor heat exchanger is discharged;
Well heater, is connected with vapor heat exchanger and reactor respectively by pipeline, sends into reactor after carrying out second-heating to the material exported by vapor heat exchanger;
Oxygen supply/hydrogen supply machine, is connected with reactor by pipeline, for reactor provides oxygen needed for reaction or hydrogen; And
Reactor, being connected with vapor heat exchanger, well heater and oxygen supply/hydrogen supply machine respectively by pipeline, for making the water in material produce supercritical state, fusing with material, and combustion reactions under the catalysis of oxygen or hydrogen, realize being separated and recovery of rare metal and non-ferrous metal.
The utility model also includes:
Hold-up vessel, is arranged on the lower end of described reactor, the rare metal obtained after reacting in order to recovery and non-ferrous metal.
The utility model also includes:
Separator, is connected with described vapor heat exchanger by pipeline, for being discharged on the top of expellant gas from described vapor heat exchanger from separator, is discharged the bottom from separator after the water vapor condensation of discharging from described vapor heat exchanger.
Principle of work of the present utility model is, raw material mixes with water after in small, broken bits, utilize the mode that mechanical pressurization and physics are heated, the supercritical water of high temperature (T>400 DEG C) and high pressure (P>25Mpa) is formed in closed unit, organism in supercritical water and raw material and inorganics fuse, (determine to use oxygen or hydrogen according to feedstock property and needs) under the catalysis of oxygen or hydrogen and produce fierce burning, and the temperature and pressure in reactor is elevated to respectively 550 DEG C ~ 650 DEG C and 30Mpa ~ 35Mpa rapidly, now, in raw material, institute's containing metal can all be melted within the time of 1 ~ 4 minute, and oxygen (hydrogen) occurs change reduction reaction.The metallic particles classification be melted is gathered, and precipitate and separate, after the organic substances such as resin produce burning in water, oxygenolysis is CO 2, N 2or hydroconverted be that hydro carbons hydride etc. is discharged from reactor top, other inorganics resolves into inorganic salt precipitation.
The advantage of supercritical water treatment device is: 1, single unit system is compact, little (the only 50m of area occupied 2), can automatic (nature) run continuously; 2, can automatic pressure control and temperature; 3, (reaction) time short (in 1 ~ 4 minute) is processed; 4, can green harmless process, ejecta is CO 2, N 2, Combination oil fuel, pure water and minerals etc., be all nontoxic material; 5, can refine and isolate nearly all metal in raw material, comprise rare precious metal and the non-ferrous metals such as gold and silver, platinum, rhodium, palladium, molybdenum, copper, zinc, lead, tin, aluminium, the metals such as the iron that content is large, silicon can be purified and be separated separately; 6, can ON-LINE SEPARATION throw out and metal object; 7, this device also can be used for the metal smelting of refractory gold concentrate, Complex concentrate.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1, stirring-type is to batch can, 2, diaphragm type high-pressure pump, 3, pipeline, 4, vapor heat exchanger, 5, oil fuel discharge outlet, 6, separator, 7, well heater, 8, oxygen supply/hydrogen supply machine, 9, reactor, 10, valve, 11, hold-up vessel, 12, discharge purified water mouth.
Embodiment
As shown in Figure 1, the utility model comprises stirring-type to batch can 1, diaphragm type high-pressure pump 2, vapor heat exchanger 4, well heater 7, oxygen supply/hydrogen supply machine 8 and reactor 9.
Wherein, stirring-type is connected with diaphragm type high-pressure pump 2, vapor heat exchanger 4, well heater 7 by pipeline 3 successively to batch can 1.Stirring-type to after discarded circuit board is in small, broken bits in batch can 1 with alkaline additive together with water, diaphragm type high-pressure pump 2 is inputted by by pipeline 3 after stirring, mixture is forced into >25Mpa and sends in vapor heat exchanger 4 by diaphragm type high-pressure pump 2, vapor heat exchanger 4 is that the high-temperature steam that utilizes reactor to export carries out one-level heating to the mixture sent into, then sends into well heater 7 and carry out secondary heating.Be heated to >=400 DEG C after, mixture is by Pipeline transport in reactor 9, and oxygen supply/hydrogen supply machine 8 simultaneously oxygenation/hydrogen enters (oxygen or hydrogen can be changed as required) in reactor 9.Produce in water after oxygen/hydrogen mixes with raw material and burn and form supercritical state, reach temperature 550 DEG C ~ 650 DEG C and pressure position 30Mpa ~ 35Mpa condition in reactor 9 under, there is oxygen (hydrogen) in reactor 9 and change reduction reaction, now, the raw material entered in reactor 9 forms automatic combustion state, and electric heater 7 stops heating.The metallics entered in reactor 9 is melted in 1 ~ 4 minutes, and category is assembled in various metals particle, and silicon is melted for elemental silicon, and inorganic substance resolve into inorganic salt.
In combustion reactions, organism is oxidized in supercritical water is decomposed into CO 2and N 2or hydroconvertedly go upward to the upper outlet of reactor 9 for hydride, be drained in heat exchange segregator 4 together with water vapor by the road, the gas that heating and separating goes out and water vapor are discharged from the top of vapor heat exchanger, be converted into aqueous combustion oil discharge from oil fuel discharge outlet 5 bottom heat exchange segregator 4 through decompression separation hydro carbons hydride.All descending bottoms being precipitated to reactor 9 such as metallic particles, elemental silicon, inorganic salt, then through the by-pass valve control 10 of outlet at bottom, precipitation separation material is drained in hold-up vessel 11.The top of heat exchange segregator 4 is provided with pipeline connect with separator 6, CO 2and N 2be disposed in separator 6 with water vapor, water recovery becomes the discharge purified water mouth 12 bottom water purification self-separation device 6 to discharge, CO 2, N 2the top of self-separation device 6 is discharged.
Enumerate two kinds of concrete technological processs below to do the utility model and further illustrate:
One: discarded computer wiring board (strips) raw material is a collection of, records and has Au, Ag, Pe, Rn, Pd, Mo, Th, Sn, Ir, Al, Fe, Si etc. containing major metal.As calculated, have a certain amount of and be worth only have the metals such as gold, copper, platinum, rhodium, palladium, iridium, molybdenum, the little value of other because of metal amounts is low to be disregarded.Therefore, determine to adopt the processing method of supercritical water oxidation to process raw material, extract its rare metal, non-ferrous metal and iron, silicon etc. simultaneously.
Computer wiring board will be discarded in small, broken bits to 200 orders, with alkaline additive with a certain proportion of water mix and blend, input high-pressure diaphragm pump 2, by high-pressure delivery pipeline 3, vapor heat exchanger 4 and electric heater 7, Pressurized-heated enters in reactor 9 to P > 250Mpa, T > 400 DEG C.Start aerator 8, mix in oxygen input reactor 9 with the water of high pressure-temperature, produce burning.Within 1 ~ 4min reaction times, pressure reaches 30Mpa ~ 35Mpa, temperature reaches 550 DEG C ~ 650 DEG C, now metal generation redox reaction, metallic fine particle is melted and automatically assembles by kind and be separated descending precipitation together with the inorganics do not melted, and enters hold-up vessel 11 from the control valve 10 bottom reactor 9.Resin is oxidized is decomposed into CO 2, N 2enter separation system with water vapor etc. to discharge.
Two, waste mobile telephone wiring board (strips) raw material is a collection of, through chemically examining the major metal recorded be: the about 280g/t such as golden 300g/t, platinum, rhodium, palladium, iridium, indium, molybdenum, cobalt, copper is also had to account for 20%, tin accounts for 10%, and aluminium accounts for 5%, and iron accounts for > 10%, silicon accounts for > 10% etc., this raw material not only metal species is many, and the many and silicon of rare precious metal etc. also accounts for significant proportion, is applicable to using the processing method of supercritical water hydrogenation to process.
By after in small, broken bits for discarded cell phone lines plate and alkaline additive and water be mixed in proportion, high-pressure diaphragm pump 2 is inputted to batch can 1 by stirring-type, sent in vapor heat exchanger 4 and electric heater 7 by high-pressure delivery pipeline 3, enter in reactor 9 after reaching T > 400 DEG C and P > 25Mpa.Start hydrogen supply machine 8, hydrogen is pressed in reactor 9 and mixes with high pressure-temperature raw water, now temperature reaches 550 ~ 650 DEG C, pressure is 30 ~ 35Mpa, all metal ions generation hydro-reduction reacts, there is the reaction of hydroconverted hydro carbons hydride in the organism such as resin, clipped wire is melted reduction and is gathered into metallic particles by kind, precipitate and separate, and the reaction times is only 1 ~ 4min.Hydrocarbon Organic after reaction occurs, hydride enter decompression separation heat exchange segregator 4 together with water vapor from reactor 9 top be that Combination oil fuel is discharged from oil fuel discharge outlet 5, water vapors etc. enter in the second separator 6 by pipeline together, water recovery becomes water purification to discharge from discharge purified water mouth 12, and waste gas etc. are discharged from top.Reaction postprecipitation enters in hold-up vessel 11 in the metallic particles of reactor bottom through control valve 10.

Claims (3)

1. a supercritical water treatment device for discarded circuit board, is characterized in that, include:
Stirring-type, to batch can, is connected with diaphragm type high-pressure pump by pipeline, as material stirring mixing vessel;
Diaphragm type high-pressure pump, is connected to batch can and vapor heat exchanger with stirring-type respectively by pipeline, for carrying out positive delivery to mixture;
Vapor heat exchanger, is connected with diaphragm type high-pressure pump, well heater and reactor respectively by pipeline, for carrying out steam heating to mixture, and isolated gas, water vapor and oil fuel is discharged;
Well heater, is connected with vapor heat exchanger and reactor respectively by pipeline, for carrying out second-heating to material;
Oxygen supply/hydrogen supply machine, is connected with reactor by pipeline, for reactor provides oxygen needed for reaction or hydrogen; And
Reactor, is connected with vapor heat exchanger, well heater and oxygen supply/hydrogen supply machine respectively by pipeline, for material reaction, realizes being separated and recovery of rare metal and non-ferrous metal.
2. the supercritical water treatment device of discarded circuit board according to claim 1, is characterized in that, also include:
Hold-up vessel, is arranged on the lower end of described reactor, the rare metal obtained after reacting in order to recovery and non-ferrous metal.
3. the supercritical water treatment device of discarded circuit board according to claim 1, is characterized in that, also include:
Separator, is connected with described vapor heat exchanger by pipeline, for being discharged on the top of expellant gas from described vapor heat exchanger from separator, is discharged the bottom from separator after the water vapor condensation of discharging from described vapor heat exchanger.
CN201420504783.2U 2014-09-03 2014-09-03 The supercritical water treatment device of discarded circuit board Expired - Lifetime CN204058560U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104692580A (en) * 2015-03-23 2015-06-10 内蒙古天一环境技术有限公司 Novel fermentation-type pharmaceutical wastewater overall treatment system and method
CN109022770A (en) * 2018-08-01 2018-12-18 昆明理工大学 Leaching method of zinc sulfide concentrate
WO2019221591A1 (en) 2018-05-18 2019-11-21 Jimenez Guzman Francisco Javier System for the recovery and refining in a physical-mechanical manner of non-ferrous metals from electronic scrap
CN112209381A (en) * 2019-07-11 2021-01-12 深圳市智合碳硅科技有限公司 Method for preparing high-purity silicon by supercritical fluid

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104692580A (en) * 2015-03-23 2015-06-10 内蒙古天一环境技术有限公司 Novel fermentation-type pharmaceutical wastewater overall treatment system and method
WO2019221591A1 (en) 2018-05-18 2019-11-21 Jimenez Guzman Francisco Javier System for the recovery and refining in a physical-mechanical manner of non-ferrous metals from electronic scrap
CN109022770A (en) * 2018-08-01 2018-12-18 昆明理工大学 Leaching method of zinc sulfide concentrate
CN109022770B (en) * 2018-08-01 2020-02-07 昆明理工大学 Leaching method of zinc sulfide concentrate
CN112209381A (en) * 2019-07-11 2021-01-12 深圳市智合碳硅科技有限公司 Method for preparing high-purity silicon by supercritical fluid

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