CN201667733U - Microwave-heating vertical continuous LiFePO4 production apparatus - Google Patents

Microwave-heating vertical continuous LiFePO4 production apparatus Download PDF

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Publication number
CN201667733U
CN201667733U CN2009202763933U CN200920276393U CN201667733U CN 201667733 U CN201667733 U CN 201667733U CN 2009202763933 U CN2009202763933 U CN 2009202763933U CN 200920276393 U CN200920276393 U CN 200920276393U CN 201667733 U CN201667733 U CN 201667733U
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unit
stove
microwave
control circuit
unit stove
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CN2009202763933U
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刘新保
吴铁雷
李恩惠
周永刚
蔡俊明
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HENAN UNION NEW ENERGY CO Ltd
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HENAN UNION NEW ENERGY CO Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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Abstract

The utility model discloses a microwave-heating vertical continuous LiFePO4 production apparatus, which comprises a feed inlet, a feed gas exchange chamber, a pretreatment unit furnace, a presintering unit furnace, a sintering unit furnace, a discharge gas exchange chamber, a cooling discharge mechanism, a discharge outlet, a vacuumizer, a protective gas input unit and an apparatus control circuit, wherein each of the pretreatment unit furnace, the presintering unit furnace and the sintering unit furnace comprises a unit-furnace feed inlet, a unit furnace body, an external unit-furnace microwave-shielding heat-preserving structure layer, a microwave source, a plurality of microwave tubes, at least one suction tube, a unit-furnace discharge outlet and an auger, and the three unit furnaces are vertically arranged, and are communicated with one another through material transfer pipelines. The utility model utilizes microwave sintering to promote the densification of the internal crystalline grains of product, thus effectively increasing the quality of the product; since multiple unit furnaces are adopted for continuous microwave sintering, the sintering efficiency is increased, and the industrialized mass production efficiency and the economic benefit are considerable.

Description

LiFePO 4 by microwaves heats vertical continuous production equipment
One, technical field:
The utility model relates to new forms of energy battery material agglomerating plant field, and particularly a kind of LiFePO 4 by microwaves heats vertical continuous production equipment.
Two, background technology:
Advantages such as lithium ion battery has discharge-rate height, serviceability temperature wide ranges, cycle performance is good, fail safe good, environment friendly and pollution-free, since coming out, be widely used in the portable electric appts such as mobile phone, laptop computer, miniature camera, as energy and material of new generation, use constantly propelling in fields such as electric automobile, satellite, space flight and military affairs, have a extensive future.Positive electrode is the important component part of lithium ion battery, is the key point of research and development high performance lithium ion battery.LiFePO4 (LiFePO 4) as anode material of lithium battery, have that raw material sources is abundant, cheap, non-environmental-pollution, advantage such as capacity is higher, cycle performance is good, good stability, preparation battery safety are given prominence to, in various battery powers field, particularly there are great market prospects large-sized power application of power aspect, is one of the most promising anode material for lithium-ion batteries.
Current LiFePO4 (LiFePO 4) the stove equipment such as atmosphere protection pusher furnace, atmosphere protection rotary furnace that mainly contain of agglomerating plant comparative maturity; these agglomerating plants are generally Electric heating; heater element is resistance wire, Elema; thermal loss is big; and temperature gradient is big; cause product composition and granularity inhomogeneous easily, occupation area of equipment is big simultaneously, the cost of investment height.Microwave sintering mainly is the coupling that utilizes microwave energy and material, be transformed into the direct heating material of heat energy to sintering temperature by the dielectric loss of material and the in-fighting of magnetic dielectric loss consumption generation, being sintered material itself is exactly heater, thereby thermal loss is little, and because of the penetration depth of microwave is big, temperature gradient is very little, can heat up apace and lower the temperature, thereby whole sintering process is shortened significantly, do not have shadow effect, now microwave technology has become one of sintering technology of tool development prospect.LiFePO4 (LiFePO 4) microwave sintering generally use the industrialized microwave stove, can't produce continuously, automaticity is low, scale and benefit are poor, at present still needleless to LiFePO4 (LiFePO 4) the microwave continuous agglomerating plant of the special suitability for industrialized production that proposes of sintering process characteristics.Utility model patent ZL200520051470.7 proposes " a kind of continuous powdery material microwave sintering furnace ", comprise feeding mechanism, microwave source, transition waceguide, body of heater, burner hearth, discharging mechanism, heat-insulation layer, temperature measurer, microwave-assisted absorbing material, body of heater is up big and down small awl bucket shape structure, be provided with helical-ribbon type taper blender in it, link to each other with transmission mechanism; Feeding mechanism is the feed screw structure, and discharging mechanism is a water-cooled spiral discharging mechanism; One cover microwave source is arranged around body of heater with the combination of many cover transition waceguides; At least one group of air inlet and exhaust outlet are provided with the stainless steel microporous filter, and body of heater is provided with the observation port of infrared radiation thermometer, and body of heater is a ceramic material, and helical-ribbon type taper blender is steel construction surface lining ceramic material or stainless steel.This utility model is simple in structure, cost is low, and does not need boat, health environment-friendly, efficient, is suitable for the microwave sintering of some polarity powder body materials.But there is the problem that can not carry out the substep continuous microwave fritting according to the technological requirement of LiFePO4 sintering in this utility model, can't realize industrialization large-scale production, and production cost is also high.
Three, summary of the invention
Technical problem to be solved in the utility model is: overcome weak point of the prior art, provide a kind of and can realize substep continuous sintering, microwave continuous agglomerating plant that can large-scale production.
The utility model is achieved in that
A kind of LiFePO 4 by microwaves heats vertical continuous production equipment, comprise charging aperture, the charging air-exchanging chamber, the pretreatment unit stove, presintering unit stove, sintering unit stove, the discharging air-exchanging chamber, discharging mechanism cools, discharging opening, vacuum extractor, protective gas input unit and equipment control circuit, the pretreatment unit stove, presintering unit stove, sintering unit stove three cover unit stoves, contain unit stove charging aperture equally, the unit body of heater, the outer micro-wave screening insulation construction layer of unit body of heater, microwave source, a certain number of microwave tube, at least one is advanced exhaust tube, unit furnace discharge mouth, unit furnace discharge valve, the auger conveyer, each vacuum degree is installed in each unit body of heater at least surveys probe, temperature measurement probe and pressure measxurement probe, the unit body of heater is the vertical hollow cylindrical of closed, its horizontal cross sectional geometry is an annular, the unit body of heater is wrapped with the outer micro-wave screening insulation construction layer of unit body of heater, unit stove charging aperture is positioned at body of heater upper surface, unit one side, unit furnace discharge mouth is positioned at body of heater lower surface, unit one side, unit furnace discharge mouth is provided with unit furnace discharge valve, microwave source is arranged in unit body of heater outer periphery and links to each other with microwave tube, microwave tube is arranged on the furnace body outer wall, advancing exhaust tube is communicated with unit body of heater inner chamber, be communicated with vacuum extractor and protective gas input unit by the band valve pipe, auger conveyer axis is installed in the unit body of heater with approximate coincidence of unit body of heater axis direction, it links to each other with the drive unit that is located at body of heater upper and lower end face, unit respectively at two ends up and down, vacuum degree is surveyed probe, temperature measurement probe and pressure measxurement probe are installed in inboard wall of furnace body top, unit, are connected with the equipment control circuit corresponding circuits by data wire; The vertical vertical layout of three cover unit stoves; be communicated with in proper order by the material transmission channel between the unit stove; charging aperture is communicated with pretreatment unit stove charging aperture near vertical by the charging air-exchanging chamber; pretreatment unit furnace discharge mouth is communicated with by the material transmission channel with the charging aperture of presintering unit stove; the discharging opening of presintering unit stove is communicated with by the material transmission channel with the charging aperture of sintering unit stove; the discharging opening of sintering unit stove is communicated with cool discharging mechanism and discharging opening by the discharging air-exchanging chamber; each unit stove; the charging air-exchanging chamber; vacuum extractor; the protective gas input unit; the discharging air-exchanging chamber; the discharging mechanism that cools is connected with the equipment control circuit corresponding circuits by data wire.
Microwave source links to each other with certain group of number microwave tube in described each unit stove, every group by the parallel connection of some microwave tubes, microwave tube is arranged on the unit furnace body outer wall, or be arranged in around the unit body of heater, wherein pretreatment unit stove, presintering unit stove microwave source power are 10～15kw, and sintering unit stove microwave source power is 30～100kw; Each unit body of heater is provided with a blast pipe at least, and advance the to bleed mouth of pipe and exhaust pipe mouth are equipped with microporous filter; Described each unit body of heater material is the optional one of quartz glass, pottery, and the auger conveyer is that quartz glass, steel construction surface serve as a contrast ceramic material, stainless steel is optional wherein a kind of; Material transmission channel cross sectional shape is fan-shaped, rectangle, circular optional one between described each unit stove.
Described charging air-exchanging chamber, comprise that hopper, inlet valve, bleeder valve, vacuum degree survey probe and at least one and advance exhaust tube, the hopper upper port is communicated with charging aperture, lower port is communicated with pretreatment unit stove charging aperture, hopper upper and lower end portion is provided with inlet valve and bleeder valve respectively, advance the exhaust tube opening and be arranged on the hopper upper inside wall, be communicated with vacuum extractor by the band valve pipe, vacuum degree is surveyed probe and is installed in the hopper upper inside wall; Described discharging air-exchanging chamber, comprise that hopper, bleeder valve, vacuum degree survey probe and at least one and advance exhaust tube, the hopper upper port is communicated with sintering unit furnace discharge mouth, lower port is communicated with the discharging mechanism that cools, bleeder valve is located at the hopper bottom, advance the exhaust tube opening and be arranged on the hopper upper inside wall, be communicated with vacuum extractor by the band valve pipe, vacuum degree is surveyed probe and is installed in the hopper upper inside wall.
The described discharging mechanism that cools, comprise Material pipeline, interlayer cover, water inlet, delivery port, auger conveyer, bleeder valve, Material pipeline is a stainless steel, and the interlayer cover is wrapped on the Material pipeline pipeline outer wall, and the one end is provided with water inlet, the other end is provided with delivery port, the auger conveyer is installed in material conveying pipe inside, and outer with being located at the outer both ends of the surface of the pipeline respectively auger conveyer drive unit in its two ends links to each other, and bleeder valve is located at discharging opening top.
Described equipment control circuit contains touch-screen, and touch-screen is communicated with pretreatment unit stove PLC control circuit, presintering unit stove PLC control circuit, sintering unit stove PLC control circuit, the charging ventilation/discharging discharging PLC control circuit of taking a breath/cool respectively by data/address bus; Described pretreatment unit stove PLC control circuit, presintering unit stove PLC control circuit, sintering unit stove PLC control circuit, contain unit stove PLC, PLC external circuits, unit stove signal acquisition circuit equally, auger driving device controls circuit, the microwave source control circuit, the air extractor control circuit; Described PLC external circuits, the hand switch that contains the some that links to each other with input, the switching signal circuit of signal acquisition circuit, and the servo-driver that links to each other with output, unit furnace discharge valve control ac contactor coil, protective gas control ac contactor coil, venting control ac contactor coil, vacuum pump control ac contactor coil, microwave source control ac contactor coil and indicator light; Described unit stove signal acquisition circuit contains input and links to each other with unit stove vacuum degree probe, the vacuum meter that output links to each other with unit stove PLC input, input links to each other with unit furnace temperature measuring probe, the temperature controller that output links to each other with unit stove PLC input links to each other with unit furnace pressure power measuring probe with input, the pressure controller that output links to each other with unit stove PLC input; Described auger conveyer drive unit drive circuit contains the servo-driver that an end links to each other with two-phase power supply, and servo-driver connects the output of servomotor and unit stove PLC; Described microwave source control circuit, the microwave transformer that contains the some that links to each other with three phase mains, hold the microwave tube circuit that links to each other with the microwave transformer, be in series with a contact of temperature control protection switch and multiconductor A.C. contactor on the former end incoming line of microwave transformer, the output of the coil linkage unit stove PLC of A.C. contactor; Described air extractor control circuit contains the A.C. contactor that an end links to each other with three phase mains, and the other end of A.C. contactor links to each other with the air extractor motor by circuit breaker, the coil linkage unit stove PLC output of A.C. contactor; Described touch-screen and pretreatment unit stove PLC control circuit, presintering unit stove PLC control circuit, sintering unit stove PLC control circuit, the charging ventilation/discharging discharging PLC control circuit of taking a breath/cool is communicated with by the RS422/485 bus.
The vertical continuous production equipment of a kind of LiFePO 4 by microwaves heating deflection, comprise charging aperture, the charging air-exchanging chamber, the pretreatment unit stove, presintering unit stove, sintering unit stove, the discharging air-exchanging chamber, discharging mechanism cools, discharging opening, vacuum extractor, protective gas input unit and equipment control circuit, the pretreatment unit stove, presintering unit stove, sintering unit stove three cover unit stoves, contain unit stove charging aperture equally, the unit body of heater, the outer micro-wave screening insulation construction layer of unit body of heater, microwave source, a certain number of microwave tube, at least one is advanced exhaust tube, unit furnace discharge mouth, unit furnace discharge valve, the auger conveyer, each vacuum degree is installed in each unit body of heater at least surveys probe, temperature measurement probe and pressure measxurement probe, the unit body of heater is the vertical hollow cylindrical of closed, its horizontal cross sectional geometry is an annular, the unit body of heater is wrapped with the outer micro-wave screening insulation construction layer of unit body of heater, unit stove charging aperture is positioned at body of heater upper surface, unit one side, unit furnace discharge mouth is positioned at body of heater lower surface, unit one side, unit furnace discharge mouth is provided with unit furnace discharge valve, microwave source is arranged in unit body of heater outer periphery and links to each other with microwave tube, microwave tube is arranged on the furnace body outer wall, advancing exhaust tube is communicated with unit body of heater inner chamber, be communicated with vacuum extractor and protective gas input unit by the band valve pipe, auger conveyer axis is installed in the unit body of heater with approximate coincidence of unit body of heater axis direction, it links to each other with the drive unit that is located at body of heater upper and lower end face, unit respectively at two ends up and down, vacuum degree is surveyed probe, temperature measurement probe and pressure measxurement probe are installed in inboard wall of furnace body top, unit, are connected with the equipment control circuit corresponding circuits by data wire; The vertical layout of the three cover parallel deflections of unit stove; angle of deviation is α; be communicated with in proper order by the material transmission channel between the unit stove; charging aperture is communicated with pretreatment unit stove charging aperture by the charging air-exchanging chamber; pretreatment unit furnace discharge mouth is communicated with by the material transmission channel with the charging aperture of presintering unit stove; the discharging opening of presintering unit stove is communicated with by the material transmission channel with the charging aperture of sintering unit stove; the discharging opening of sintering unit stove is communicated with cool discharging mechanism and discharging opening by the discharging air-exchanging chamber; each unit stove; the charging air-exchanging chamber; vacuum extractor; the protective gas input unit; the discharging air-exchanging chamber; the discharging mechanism that cools is connected with the equipment control circuit corresponding circuits by data wire.
Microwave source links to each other with certain group of number microwave tube in described each unit stove, every group by the parallel connection of some microwave tubes, microwave tube is arranged on the unit furnace body outer wall, or be arranged in around the unit body of heater, wherein pretreatment unit stove, presintering unit stove microwave source power are 10～15kw, and sintering unit stove microwave source power is 30～100kw; Each unit body of heater is provided with a blast pipe at least, and advance the to bleed mouth of pipe and exhaust pipe mouth are equipped with microporous filter; Described each unit body of heater material is the optional one of quartz glass, pottery, and the auger conveyer is that quartz glass, steel construction surface serve as a contrast ceramic material, stainless steel is optional wherein a kind of; Material transmission channel cross sectional shape is fan-shaped, rectangle, circular optional one between described each unit stove; The vertical layout of each unit stove deflection, unit body of heater axis downwards and the horizontal direction angle be skew angle, 80 °≤α≤100 °.
Described charging air-exchanging chamber, comprise that hopper, inlet valve, bleeder valve, vacuum degree survey probe and at least one and advance exhaust tube, the hopper upper port is communicated with charging aperture, lower port is communicated with pretreatment unit stove charging aperture, hopper upper and lower end portion is provided with inlet valve and bleeder valve respectively, advance the exhaust tube opening and be arranged on the hopper upper inside wall, be communicated with vacuum extractor by the band valve pipe, vacuum degree is surveyed probe and is installed in the hopper upper inside wall; Described discharging air-exchanging chamber, comprise that hopper, bleeder valve, vacuum degree survey probe and at least one and advance exhaust tube, the hopper upper port is communicated with sintering unit furnace discharge mouth, lower port is communicated with the discharging mechanism that cools, bleeder valve is located at the hopper bottom, advance the exhaust tube opening and be arranged on the hopper upper inside wall, be communicated with vacuum extractor by the band valve pipe, vacuum degree is surveyed probe and is installed in the hopper upper inside wall.
The described discharging mechanism that cools, comprise Material pipeline, interlayer cover, water inlet, delivery port, auger conveyer, bleeder valve, Material pipeline is a stainless steel, and the interlayer cover is wrapped on the Material pipeline pipeline outer wall, and the one end is provided with water inlet, the other end is provided with delivery port, the auger conveyer is installed in material conveying pipe inside, and outer with being located at the outer both ends of the surface of the pipeline respectively auger conveyer drive unit in its two ends links to each other, and bleeder valve is located at discharging opening top.
Described equipment control circuit contains touch-screen, and touch-screen is communicated with pretreatment unit stove PLC control circuit, presintering unit stove PLC control circuit, sintering unit stove PLC control circuit, the charging ventilation/discharging discharging PLC control circuit of taking a breath/cool respectively by data/address bus; Described pretreatment unit stove PLC control circuit, presintering unit stove PLC control circuit, sintering unit stove PLC control circuit, contain unit stove PLC, PLC external circuits, unit stove signal acquisition circuit equally, auger driving device controls circuit, the microwave source control circuit, the air extractor control circuit; Described PLC external circuits, the hand switch that contains the some that links to each other with input, the switching signal circuit of signal acquisition circuit, and the servo-driver that links to each other with output, unit furnace discharge valve control ac contactor coil, protective gas control ac contactor coil, venting control ac contactor coil, vacuum pump control ac contactor coil, microwave source control ac contactor coil and indicator light; Described unit stove signal acquisition circuit contains input and links to each other with unit stove vacuum degree probe, the vacuum meter that output links to each other with unit stove PLC input, input links to each other with unit furnace temperature measuring probe, the temperature controller that output links to each other with unit stove PLC input links to each other with unit furnace pressure power measuring probe with input, the pressure controller that output links to each other with unit stove PLC input; Described auger conveyer drive unit drive circuit contains the servo-driver that an end links to each other with two-phase power supply, and servo-driver connects the output of servomotor and unit stove PLC; Described microwave source control circuit, the microwave transformer that contains the some that links to each other with three phase mains, hold the microwave tube circuit that links to each other with the microwave transformer, be in series with a contact of temperature control protection switch and multiconductor A.C. contactor on the former end incoming line of microwave transformer, the output of the coil linkage unit stove PLC of A.C. contactor; Described air extractor control circuit contains the A.C. contactor that an end links to each other with three phase mains, and the other end of A.C. contactor links to each other with the air extractor motor by circuit breaker, the coil linkage unit stove PLC output of A.C. contactor; Described touch-screen and pretreatment unit stove PLC control circuit, presintering unit stove PLC control circuit, sintering unit stove PLC control circuit, the charging ventilation/discharging discharging PLC control circuit of taking a breath/cool is communicated with by the RS422/485 bus.
The beneficial effects of the utility model are:
1, the conventional sintering method of LiFePO4 mainly is an electrical heating method, and this method is utilized heat-conduction principle, begins heating from the outside and is transmitted to inside again, and heat transfer rate is slow, and production efficiency low frit rate of finished products is low.Use microwave sintering LiFePO4 (LiFePO 4) shortened sintering time greatly, have only about 20% of conventional method, reduced sintering energy consumption, economize on electricity is more than 80%, and production cost significantly reduces.The utility model microwave sintering can promote the inner crystal grain densification of product, particle is tiny, distribution of particles is more even, improves product quality effectively, and final products have the superior characteristics of purity height, Stability Analysis of Structures, good cycle, electric conductivity and discharge performance.
2, microwave sintering apparatus of the present utility model is thermal source with the microwave, combine the advantage of conventional sintering stove, vacuum sintering furnace and microwave agglomerating furnace, divide 3 unit stoves to handle stage by stage, sintering process is carried out the substep sequential control, fully realize technological requirement, guaranteed product quality.A plurality of unit stove is set has improved sintering efficient effectively, between a plurality of unit stove material conveying device is set, a plurality of unit stove is connected into an integral body, thereby realize producing continuously, industrialization large-scale production becomes possibility.Under the effect of auger conveyer, material is stirred, overturns, and material is heated evenly, accelerated the sintering of material, has guaranteed the uniformity and the continuity of inlet amount, charging rate.Calculated by 3 hours whole sintering process time, but discharging every day 600kg at least compare with common monomer industrial microwave oven sintering process, production efficiency has improved more than 3 times, economize on electricity is more than 60%, rate of finished products was brought up to more than 90% by 80% of the past.Improved more than 5 times than the production efficiency of traditional sintering furnace about 20 hours, economize on electricity is more than 80%, and industrial-scale production efficient and economic benefit are considerable.
3, microwave sintering makes the product self-heating, has reduced the waste of energy to greatest extent, has improved operational environment; Charging, sintering, discharging are carried out continuously, do not need manually repeatedly to load and unload material, the production efficiency height, and do not have dust from flying, and health environment-friendly does not have " three wastes " and produces, and clean production realized the hommization operational environment.
4, being provided with one group of air inlet around each unit body of heater at least feeds in the unit body of heater; input top is provided with one group of exhaust outlet at least; be provided with microporous filter on the gas port like this; both be convenient to input, got rid of protection or reaction atmosphere; prevented that dust from raising outward, shielded microwave leakage effectively.
5, Equipment Control of the present utility model adopts touch-screen and many PLC centralized control, realize the plant continuous production of step of multiplex (MUX), improved the automaticity and the craft precision of entire equipment, guaranteed the quality of product, realize industrial large-scale production, improved production efficiency.
6, touch-screen, PLC centralized control, man-machine interactive operation is intuitively easy, and equipment debugging is safeguarded simple, and it is convenient to regulate technological parameter, reliable working performance.
Four, description of drawings:
Fig. 1 heats vertical continuous production equipment structural representation for LiFePO 4 by microwaves of the present utility model;
Fig. 2 heats vertical continuous production equipment charging air-exchanging chamber structural representation for LiFePO 4 by microwaves of the present utility model;
Fig. 3 heats vertical continuous production equipment pretreatment unit furnace structure schematic diagram for LiFePO 4 by microwaves of the present utility model;
Fig. 4 heats vertical continuous production equipment presintering unit furnace structure schematic diagram for LiFePO 4 by microwaves of the present utility model;
Fig. 5 heats vertical continuous production equipment sintering unit furnace structure schematic diagram for LiFePO 4 by microwaves of the present utility model;
Fig. 6 heats vertical continuous production equipment discharging air-exchanging chamber structural representation for LiFePO 4 by microwaves of the present utility model;
Fig. 7 heats the vertical continuous production equipment discharging mechanism structural representation that cools for LiFePO 4 by microwaves of the present utility model;
Fig. 8 heats the equipment control circuit schematic block diagram of vertical continuous production equipment for LiFePO 4 by microwaves of the present utility model;
Fig. 9 heats the unit stove control circuit PLC wiring circuit diagram of vertical continuous production equipment for LiFePO 4 by microwaves of the present utility model;
Figure 10 heats the unit stove control circuit schematic diagram of vertical continuous production equipment for LiFePO 4 by microwaves of the present utility model;
Figure 11 is the vertical continuous production equipment structural representation of LiFePO 4 by microwaves heating deflection of the present utility model.
Among the figure, 1-charging aperture, 2-charging air-exchanging chamber; 3-pretreatment unit stove; 4-material transmission channel, 5-presintering unit stove, 6-sintering unit stove; 7-discharging air-exchanging chamber; the 8-discharging mechanism that cools, 9-discharging opening, 10-vacuum extractor; 11-protective gas input unit; 12-charging/bleeder valve, 13-vacuum degree is surveyed probe, and 14-advances exhaust tube; 15-charging air-exchanging chamber hopper; 16-unit stove charging aperture, the outer micro-wave screening insulation construction layer of 17-unit body of heater, 18-unit body of heater; the 19-microwave source; the 20-microwave tube, 21-unit furnace discharge mouth, 22-unit furnace discharge valve; 23-auger conveyer; the 24-temperature measurement probe, 25-pressure measxurement probe, 26-blast pipe; 27-auger conveyer drive unit; 28-discharging air-exchanging chamber hopper, 29-interlayer cover, 30-Material pipeline; the 31-delivery port; the 32-water inlet, 33-pretreatment unit stove PLC control circuit, 34-presintering unit stove PLC control circuit; 35-sintering unit stove PLC control circuit; the 36-charging ventilation/discharging discharging PLC control circuit of taking a breath/cool, 37-unit stove signal acquisition circuit, 38-auger conveyer drive unit drive circuit; 39-microwave source control circuit, 40-air extractor control circuit.
Five, embodiment:
Embodiment one: a kind of LiFePO 4 by microwaves heats vertical continuous production equipment, referring to Fig. 1-Figure 10, comprise charging aperture 1, charging air-exchanging chamber 2, pretreatment unit stove 3, presintering unit stove 5, sintering unit stove 6, discharging air-exchanging chamber 7, discharging mechanism 8 cools, discharging opening 9, vacuum extractor 10, protective gas input unit 11 and equipment control circuit, pretreatment unit stove 5, presintering unit stove 6, sintering unit stove 7 three cover unit stoves, contain unit stove charging aperture 16 equally, the outer micro-wave screening insulation construction layer 17 of unit body of heater, unit body of heater 18, microwave source 19, number microwave tube 20, advance exhaust tube 14, unit furnace discharge mouth 21, auger conveyer 23, each vacuum degree is installed in each unit body of heater surveys probe 13, temperature measurement probe 24 and pressure measxurement probe 25, unit body of heater 19 is the vertical hollow cylindrical of closed, its horizontal cross sectional geometry is an annular, unit body of heater 18 is wrapped with the outer micro-wave screening insulation construction layer 17 of unit body of heater, unit stove charging aperture 16 is positioned at body of heater upper surface, unit one side, unit furnace discharge mouth 21 is positioned at body of heater lower surface, unit one side, unit furnace discharge mouth 21 is provided with unit furnace discharge valve 22, microwave source 19 is arranged in unit body of heater outer periphery and links to each other with microwave tube 20, microwave tube 20 is arranged on the furnace body outer wall, advancing exhaust tube 14 is communicated with unit body of heater 19 inner chambers, be communicated with vacuum extractor 10 and protective gas input unit 11 by the band valve pipe, auger conveyer 23 axis are installed in the unit body of heater 18 with approximate coincidence of unit body of heater axis direction, it links to each other with the drive unit 27 that is located at body of heater upper and lower end face, unit respectively at two ends up and down, vacuum degree is surveyed probe 13,24 of temperature survey spies and pressure measxurement probe 25 are installed in inboard wall of furnace body top, unit, are connected with the equipment control circuit corresponding circuits by data wire; The vertical vertical layout of three cover unit stoves; be communicated with by material transmission channel 4 orders between the unit stove; charging aperture 1 is communicated with pretreatment unit stove 3 charging apertures 16 near verticals by the charging air-exchanging chamber; pretreatment unit stove 3 discharging openings 21 are communicated with by material transmission channel 4 with the charging aperture 16 of presintering unit stove 5; the discharging opening 21 of presintering unit stove 5 is communicated with by material transmission channel 4 with the charging aperture 16 of sintering unit stove 6; the discharging opening 21 of sintering unit stove 6 is communicated with cool discharging mechanism 8 and discharging opening 9 by discharging air-exchanging chamber 7; unit stove 3; 5; 6; charging air-exchanging chamber 2; vacuum extractor 10; protective gas input unit 11; discharging air-exchanging chamber 7; the discharging mechanism 8 that cools is connected with the equipment control circuit corresponding circuits by data wire.
Wherein, microwave source 19 links to each other with 6 groups of microwave tubes in each unit stove, every group of 3 microwave tube parallel connections, and microwave tube 20 is evenly arranged on unit body of heater 18 walls, wherein pretreatment unit stove 3, presintering unit stove 5 microwave source power are 15kw, and stove 6 microwave source power in sintering unit are 100kw; Each unit body of heater 18 is provided with a blast pipe 26, advances 14 mouthfuls of exhaust tubes and blast pipe and is equipped with microporous filter for 26 mouthfuls; Each unit body of heater 18 material is a quartz glass, and auger conveyer 23 is a quartz glass; Material transmission channel 4 cross sectional shapes are fan-shaped between each unit stove.
Charging air-exchanging chamber 2, comprise hopper 15, inlet valve 12, bleeder valve 12, vacuum degree detection probe 13 and advance exhaust tube 14, hopper 15 upper port are communicated with charging aperture 1, lower port is communicated with pretreatment unit stove charging aperture 16, hopper 15 upper and lower end portions are provided with inlet valve 12 and bleeder valve 12 respectively, advance exhaust tube 14 openings and be arranged on hopper 15 upper inside wall, be communicated with vacuum extractor 10 by the band valve pipe, vacuum degree is surveyed probe 13 and is installed in the hopper upper inside wall.
Discharging air-exchanging chamber 7, comprise hopper 28, bleeder valve 12, vacuum degree detection probe 13 and advance exhaust tube 14, the hopper upper port is communicated with sintering unit furnace discharge mouth 21, lower port is communicated with the discharging mechanism 9 that cools, bleeder valve 12 is located at hopper 28 bottoms, advance exhaust tube 14 openings and be arranged on hopper 28 upper inside wall, be communicated with vacuum extractor 10 by the band valve pipe, vacuum degree is surveyed probe 13 and is installed in hopper 28 upper inside wall.
Discharging mechanism 8 cools, comprise interlayer cover 29, Material pipeline 30, water inlet 33, delivery port 31, auger conveyer 23, bleeder valve 12, Material pipeline 30 is a stainless steel, interlayer cover 29 is wrapped on material conveying pipe 30 outer walls, the one end is provided with water inlet 32, the other end is provided with delivery port 31, auger conveyer 23 is installed in material conveying pipe 30 inside, outer with the being located at the pipe ends face respectively auger conveyer drive unit 27 in its two ends links to each other, and bleeder valve 12 is located at discharging opening 9 tops.
Equipment control circuit contains touch-screen, and touch-screen is communicated with pretreatment unit stove PLC control circuit 33, presintering unit stove PLC control circuit 34, sintering unit stove PLC control circuit 35, the charging ventilation/discharging discharging PLC control circuit 36 of taking a breath/cool respectively by data/address bus RS422/485; Pretreatment unit stove PLC control circuit 33, presintering unit stove PLC control circuit 34, sintering unit stove PLC control circuit 35, contain unit stove PLC, PLC external circuits, unit stove signal acquisition circuit 37 equally, auger driving device controls circuit 38, microwave source control circuit 39, air extractor control circuit 40; The PLC external circuits, contain the hand switch B2-B11 that links to each other with input, the switching signal circuit of signal acquisition circuit 37, and the servo-driver that links to each other with output, unit furnace discharge valve control ac contactor coil KF1, protective gas control ac contactor coil KF2, venting control ac contactor coil KF3, vacuum extractor control ac contactor coil KM1, microwave source control ac contactor coil KA1-KA18 and indicator light L3-L14; Unit stove signal acquisition circuit 37 contains input and links to each other with unit stove vacuum degree probe 13, the vacuum meter that output links to each other with unit stove PLC input, input links to each other with unit furnace temperature measuring probe 24, the temperature controller that output links to each other with unit stove PLC input links to each other with unit furnace pressure power measuring probe 25 with input, the pressure controller that output links to each other with unit stove PLC input; Auger conveyer drive unit drive circuit 38 contains the servo-driver that an end links to each other with two-phase power supply, and servo-driver connects the output of servomotor SM1 and unit stove PLC; Microwave source control circuit 39, contain 18 microwave transformer T1-T18 that link to each other with three phase mains, hold the microwave tube circuit that links to each other with the microwave transformer, be in series with a contact of temperature control protection switch DZ2-DZ19 and three contact A.C. contactors on the former end incoming line of microwave transformer, be respectively KA1-KA18, the output of the coil linkage unit stove PLC of A.C. contactor; Air extractor control circuit 40 contains the A.C. contactor KM1 that an end links to each other with three phase mains, and the other end of A.C. contactor links to each other the coil linkage unit stove PLC output of A.C. contactor KM1 by circuit breaker DZ20 with air extractor motor M 1.
It is thermal source with the microwave that LiFePO 4 by microwaves of the present utility model heats vertical continuous production equipment, from LiFePO4 (LiFePO 4) sintering process set out, combine the advantage of conventional sintering stove, vacuum sintering furnace and microwave agglomerating furnace, realize preliminary treatment, presintering and three technological processes of sintering, whole agglomerating plant is divided into 3 unit stoves, each unit stove is finished a technological process, and the material transmission channel is set between the unit stove, a plurality of unit stove is connected into an integral body realize producing continuously, can raise the efficiency like this, promote output.As Fig. 1, Fig. 3-shown in Figure 5, three unit furnace bodies 18 are airtight vertical cylindrical shape, the body of heater material is a quartz glass, the about 250mm of furnace diameter, pretreatment unit stove 3 and the about 3m of presintering unit stove 5 length, quartz glass tubular structure more becomes simple than thorax structure in the stainless steel of traditional microwave sintering furnace, the whole seal of body of heater is better, and microwave source is evenly distributed on furnace body outer wall, and the microwave penetrating body of heater adds thermal material, can reduce lossy microwave, improve the efficiency of heating surface.Body of heater outer micro-wave screening insulation construction layer 17 in unit is a sandwich construction, and what internal layer and body of heater 18 were complementary is microwave shielding layer, adopts stainless steel material processing, and micro-wave screening is effective, can prevent microwave leakage; Screen is outward the heat-insulation layer by the insulation material parcel, reduces the loss of heat.The unit stove reaches non-oxide atmosphere; need be to vacuumizing in the stove and input protection gas; each unit stove is provided with into, and exhaust tube 14 is communicated with unit body of heater inner chamber; be communicated with vacuum extractor 10 and protective gas input unit 11 by the band valve pipe; valve is a gas solenoid valve; before being installed in vacuum extractor and protective gas input unit respectively, the switching signal control of the opening of gas solenoid valve, closed output circuit output by each unit stove PLC.Material in the utility model in the stove concentrates on the sintering furnace bottom, auger conveyer 23 constantly just, change counter-rotating to material stir, upset, material is heated evenly; Mass transport between the unit stove by the material self gravitation, is entered in the next body of heater by bleeder valve 22 controls by approximately perpendicular material transmission channel; Auger conveyer 23 in the unit stove is similar to the body of heater axis and overlaps installation, its helical blade edge is close with inboard wall of furnace body, material spins upside down under helical blade stirs and is heated, outer with the being located at the unit body of heater respectively drive unit 27 in auger conveyer two ends links to each other, drive unit 27 is the servomotor of unit stove PLC control, also can use motor, speed changer, speed regulating device are realized, by servomotor is controlled, the auger conveyer keeps 20 rev/mins rotating speed, after just changeing 5 minutes, servomotor backward rotation 5 minutes, make material in body of heater on, following upset is moved, be heated evenly, improve sintering quality; Auger conveyer 23 is a quartz glass for material, and the microwave penetrating rate is good, and loss is little; Each unit stove upper inside wall is provided with vacuum degree and surveys probe 13, temperature measurement probe 24 and pressure measxurement probe 25, and vacuum degree signal, temperature signal, pressure signal that probe is gathered link by signal acquisition circuit 37 and unit stove PLC input; Each unit body of heater is provided with a blast pipe 26, and blast pipe one end is equipped with exhaust solenoid valve, and by unit stove PLC control, advance the to bleed mouth of pipe and exhaust pipe mouth are provided with microporous filter, reduce the pollution in producing; Discharging opening 21 in each unit stove is provided with unit furnace discharge valve 22, the transmission and the process of control material, bleeder valve 22 is the driven plate valve, also can select electronic gate valve, electrical ball valve, electric butterfly valve, electronic bleeder valve for use, the opening and closing of unit furnace discharge valve are by the switching signal control of unit stove PLC output.
Each unit stove microwave source 19 adopts 6 groups of microwave tubes to link to each other, the structure of every group of 3 microwave tube parallel connections, microwave tube can adopt the industrial magnetron of 0.8kw/2450MHz, this many group microwave tube power synthesis modes, guarantee that microwave heating is even in the stove, heating-up temperature, power control are accurately; Whole microwave source is provided with temperature protective device, can the long-time continuous stable reliably working.
Charging air-exchanging chamber 2, discharging air-exchanging chamber 7 guarantee in the equipment continuous flow procedure, can not destroy the non-oxygen environment in the unit stove when dropping into raw material, product discharging, realize producing continuously.As Fig. 2, shown in Figure 6, charging air-exchanging chamber 2 is provided with hopper 15, inlet valve 12, bleeder valve 12,13 and one of vacuum degree probes advance exhaust tube 14, airtight hopper inner chamber adopts stainless steel processing, cross sectional shape is square, also can do circular as required or rectangle, inlet valve 12 is established in hopper 15 upper ends, and bleeder valve 12 is established in the bottom, and inlet valve, bleeder valve are the driven plate valve, also can select electronic gate valve, electrical ball valve, electric butterfly valve, electronic bleeder valve for use, the opening and closing of material valve are by the switching signal control of PLC output; Vacuum degree probe 13, operation principle and each unit stove identical of advancing exhaust tube 14, effect is under the hopper closed state, the non-oxygen environment of vacuumize, the formation of input protection gas is consistent with the unit stove.The structure and the course of work of the structure of discharging air-exchanging chamber 7 and charging air-exchanging chamber are basic identical, owing to link to each other with the bleeder valve of sintering unit stove, the discharging air-exchanging chamber is not established inlet valve.
The discharging mechanism 8 that cools can make the final products fast cooling after finishing last sintering process flow process, guarantee to produce continuously.As shown in Figure 7, the discharging mechanism that cools adopts water-cooling pattern, mass transport is used the auger conveyer, and Material pipeline 30 is a stainless steel, and length is 6m, interlayer cover 29 is wrapped on Material pipeline 30 outer walls, the one end is provided with water inlet 32, and the other end is provided with delivery port 31, sets the flow 80L/min of water, water inlet control is controlled by the electromagnetism water valve that is located at the water inlet, and the opening and closing of electromagnetism water valve are by the switching signal control of PLC output; Auger conveyer drive unit 27 is the servomotor of PLC control, also can use motor, speed changer, speed regulating device to realize; Bleeder valve 12 is the driven plate valve, also can select electronic gate valve, electrical ball valve, electric butterfly valve, electronic bleeder valve for use, and the opening and closing of material valve are by the switching signal control of PLC output.
Equipment control circuit adopts the circuit structure of the many PLC of touch-screen centralized control, realizes the automatic control of entire equipment.As shown in Figure 8, wherein touch-screen is a MT500 type touch-screen, touch-screen is communicated with 36 with pretreatment unit stove PLC control circuit 33, presintering unit stove PLC control circuit 34, sintering unit stove PLC control circuit 35, the charging ventilation/discharging discharging PLC control circuit of taking a breath/cool respectively by the RS422/485 data/address bus, the procedure parameter of equipment, processing parameter setting, control program, the programming of PLC all can be undertaken by the man-machine interface of touch-screen.PLC adopts Delta DVP40ES200RT type PLC, its input, output point number average are 24 points, pretreatment unit stove PLC control circuit, presintering unit stove PLC control circuit, sintering unit stove PLC control circuit, circuit structure and function are basic identical, contain unit stove PLC, PLC external circuits, unit stove signal acquisition circuit 37 equally, auger driving device controls circuit 38, microwave source control circuit 39, air extractor control circuit 40.
As shown in Figure 9, unit 24 input points of stove PLC input are connected with ten hand switches of B2-B11, S3, and S5-S10 connects the switching signal of signal acquisition circuit.B2 connects PLC input X0, be air extractor control hand switch, B3 connects X1, is the exhaust solenoid valve hand switch, B4 connects X2, be microwave group 1 hand switch, B5 connects X3, is microwave group 2 hand switches, B6 connects X4, be microwave group 3 hand switches, B7 connects X5, is microwave group 4 hand switches, B8 connects X6, be microwave group 5 hand switches, B9 connects X7, is microwave group 6 hand switches, B10 connects X17, be auger conveyer drive unit hand switch, B11 connects X18, is unit furnace discharge valve hand switch; It is when abnormal conditions occurring in equipment operation that hand switch is set, and manually stops or using when starting relevant device.S3 connects PLC input X10, is temperature switch, and S5, S6 connect X11, X12, be the temperature controller output switching signal, S7, S8 connect X13, X14, are the vacuum meter output switching signal, S9, S10 connect X15, X16, are the pressure controller output switching signal.Y0-Y18 in 24 input points of PLC output, wherein Y0-Y3 connects servo-driver, Y4 linkage unit furnace discharge valve control ac contactor coil KF1, KF1 is parallel with indicator light L3; Y5 connects protective gas control ac contactor coil KF2, i.e. electromagnetic gas valve coil, and KF2 is parallel with indicator light L4; Y6 connects venting control ac contactor coil KF3, i.e. electromagnetic gas valve coil, and KF3 is parallel with indicator light L5; Y7 connects vacuum pump control ac contactor coil KM1; Y10-Y12 connects temperature indicator L6 respectively, vacuum degree indicator light L7, pressure indicator light L8; Y13-Y18 connects six microwave group control ac contactor coil KA1-3 respectively, KA4-6, and KA7-9, KA10-12, KA13-15, it is L9-L14 that KA16-18 and each coils from parallel connection of coils have indicator light.
Unit stove signal acquisition circuit 37, as shown in figure 10, containing input links to each other with unit stove vacuum degree probe, the vacuum meter that output links to each other with unit stove PLC input, the vacuum degree probe signal enters vacuum meter, compare with the vacuum degree higher limit of setting, lower limit, reach in limited time, switching signal of vacuum meter upper limit output output enters the X13 input of PLC; Reach down in limited time, switching signal of vacuum meter lower limit output output enters the X14 input of PLC; The course of work of temperature controller, pressure controller is the same with vacuum meter, temperature controller upper limit output, lower limit output connect X11, the X12 input of PLC respectively, and pressure controller upper limit output, lower limit output connect X11, the X12 input of PLC respectively.
Auger conveyer drive unit drive circuit 38, contain the servo-driver that an end links to each other with two-phase power supply as shown in figure 10, its signal input end links to each other with unit stove PLC output X0-X3, servo-driver connects servomotor SM1, servomotor is as the drive unit of unit stove auger conveyer, and control precision height, equipment connect simply, technology maturation, good reliability; Circuit breaker DZ21 provide overcurrent protection.
Microwave source control circuit 39; as shown in figure 10; contain 18 microwave transformer T1-T18 that link to each other with three phase mains; hold the microwave tube circuit that links to each other with the microwave transformer; each microwave tube circuit contains a microwave tube G1-G18; be in series with a contact of temperature control protection switch and three A.C. contactors on the former end incoming line of each microwave transformer; three contacts are one group; by one three contact A.C. contactor control; 18 microwave tubes have 6 groups altogether for 3 one group, and the ac contactor contact adhesive is controlled by PLC, by controlling the adhesive of corresponding A.C. contactor; start one group of corresponding three microwave tube, different microwave tube combinations realizes that power is synthetic.The temperature detect switch (TDS) effect is to surpass in limited time in the microwave tube working temperature, open circuit, and the protection microwave tube can not burn out.
Air extractor control circuit 40; as shown in figure 10; contain the A.C. contactor KM1 that an end links to each other with three phase mains; the other end of A.C. contactor links to each other with air extractor motor M 1 by circuit breaker DZ20; the coil linkage unit stove PLC output of A.C. contactor KM1; the motor M of bleeding 1 is three phase electric machine, and M1 starts the control signal control by PLC output, and circuit breaker DZ20 provides overcurrent protection for motor M 1.
Charging ventilation/discharging discharging PLC the control circuit 36 of taking a breath/cool; the control of the charging/bleeder valve that relates to, vacuum degree signals collecting, vacuumize, structure, the operation principle of interlock circuit is basic identical in process control such as the driving of the control of input protection gas, current, auger conveyer and the unit stove, no longer draw to illustrate and repeat.
In the actual production, it at first is 200810237321.8 patent application according to the utility model people application number, " preparation method of ferric lithium phosphate precursor and charging battery electrode thereof ", prepare ferric lithium phosphate precursor, per hour pressing, 50 kilograms speed adds in the feed appliance, add the 25KG ferric lithium phosphate precursor, be numbered material A, drop into LiFePO 4 by microwaves of the present utility model and heat vertical continuous production equipment charging aperture 1, each unit stove under the equipment initial condition, air-exchanging chamber charging/discharging valve plate all is in the closing seam state, at first equipment control circuit is opened charging air-exchanging chamber inlet valve 12, the presoma material A enters hopper 15, the closure of feed valve 12 then, open the preceding electromagnetic gas valve of pump, and formation vacuumizes path and starts vacuum extractor 10 by being drawn into gas port 14, the charging air-exchanging chamber is vacuumized, the data that detect according to vacuum degree detecting head in the charging air-exchanging chamber 13 determine to reach set vacuum degree after, stop to bleed, finish fill process.Then preliminary treatment stove 3 unit bodies of heater 18 are vacuumized; after vacuum degree detection probe 13 detects and reaches set point; open charging air-exchanging chamber bleeder valve 12; the presoma material falls into preliminary treatment stove 3 unit bodies of heater 18 through unit stove charging aperture 16; after material all enters the pretreatment unit stove; close charging air-exchanging chamber bleeder valve; open the preposition electromagnetic gas valve of protective gas input unit; enter the unit body of heater 18 that vacuumizes by advancing exhaust tube 14 input nitrogen; after body of heater internal pressure measuring probe 25 measurement data determining unit body of heater internal pressures in unit reach normal pressure; close preposition electromagnetic gas valve and stop gas transmission; start microwave source 19; start 6 groups of microwave tubes that are located at body of heater outside, unit by equipment control circuit; setting the heating gross power is 12kw; material is heated; reach 90 ℃ of temperature; start the auger conveyer; by drive unit servomotor control auger conveyer rotating speed is that per minute 20 changes; just changeed in 5 minutes; counter-rotating in 5 minutes; constantly stir and make materials overturning, thermally equivalent heats and finished the pretreating process flow process in 30 minutes.Carry out getting the 25KG ferric lithium phosphate precursor again in the pretreating process process in material A, be numbered material B, drop into the agglomerating plant charging aperture, enter charging air-exchanging chamber hopper, the sealing air-exchanging chamber vacuumizes air-exchanging chamber, and material B is pending in charging air-exchanging chamber hopper.
The material A pretreating process later stage, to presintering unit stove evacuation, reach set point after, in presintering unit body of heater, import nitrogen by the protective gas input unit, reach normal pressure.Material A is finished pretreating process, open unit furnace discharge valve 22, the auger conveyer quickens just turning to down the propelling movement material, material is under self gravitation and auger propelling movement effect, fall into the pre-burning freezing of a furnace by mass transport passage 4, after leftover materials fall in the pre-burning freezing of a furnace, pretreatment unit furnace discharge valve closure.After material enters the pre-burning freezing of a furnace, start microwave source 19, start 6 groups of microwave tubes that are located at body of heater outside, unit by equipment control circuit, setting the heating gross power is 12kw, material is heated, reach 230 ℃ of temperature, start the auger conveyer, by drive unit servomotor control auger conveyer rotating speed is that per minute 20 changes, just changeed in 5 minutes, counter-rotating in 5 minutes is constantly stirred and is made materials overturning, thermally equivalent heats and finished the pre-sintering process flow process in 30 minutes.
After material A entered the pre-burning freezing of a furnace fully, after the bleeder valve closure of pretreatment unit stove, the material B in the charging air-exchanging chamber hopper entered the pretreating process that the pretreatment unit stove carries out, and all have material in pretreatment unit stove and the presintering unit stove this moment.Carry out getting the 25KG ferric lithium phosphate precursor again in the pretreating process process at material B, be numbered material C, drop into the agglomerating plant charging aperture, enter charging air-exchanging chamber hopper, the sealing air-exchanging chamber vacuumizes air-exchanging chamber, and material C is pending in charging air-exchanging chamber hopper.
In the material A pre-sintering process later stage, equipment control circuit starts vacuum extractor to sintering unit stove evacuation, reach set point after, the protective gas input unit is imported nitrogen in presintering unit body of heater, reach normal pressure.Material A is finished pre-sintering process, opens unit furnace discharge valve 22, and the auger conveyer quickens just turning to down the propelling movement material, material is under self gravitation and auger propelling movement effect, fall into sintering furnace by mass transport passage 4, after leftover materials fall in the sintering furnace, presintering unit furnace discharge valve closure.After material enters the pre-burning freezing of a furnace, start microwave source 19, start 6 groups of microwave tubes that are located at body of heater outside, unit by equipment control circuit, setting the heating gross power is 30kw, material is heated, reach 550 ℃ of temperature, start the auger conveyer, by drive unit servomotor control auger conveyer rotating speed is that per minute 20 changes, just changeed in 5 minutes, counter-rotating in 5 minutes is constantly stirred and is made materials overturning, thermally equivalent heats and finished the pre-sintering process flow process in 120 minutes.In the material A sintering process, material B carries out pre-sintering process in the pre-burning freezing of a furnace handles, and material C carries out pretreating process in the pretreatment unit stove handles, and gets the 25KG ferric lithium phosphate precursor again, is numbered material D, enters in the charging air-exchanging chamber hopper pending.After material B, C finished treatment process, equipment control circuit was closed the microwave heating and the auger conveyer of pretreatment unit stove and presintering unit stove, and wait material A sintering processes technology is finished.
In the material A sintering process later stage, equipment control circuit starts vacuum extractor the discharging air-exchanging chamber is vacuumized, and stops after reaching set point.After material A is finished sintering, open unit furnace discharge valve 22, the auger conveyer quickens just turning to down the propelling movement material, material is under self gravitation and auger propelling movement effect, fall into the discharging air-exchanging chamber by mass transport passage 4, after leftover materials fall into the discharging air-exchanging chamber from discharging opening, sintering unit furnace discharge valve closure.After discharging is finished, sintering unit furnace discharge valve closure, the bleeder valve of pre-burning freezing of a furnace unit stove is opened, unit stove auger conveyer is sent unit furnace discharge mouth with material B and is entered in the sintering furnace by the material transmission channel, close presintering unit furnace discharge valve, material B carries out sintering process in sintering furnace handles.After the presintering bleeder valve cuts out, material C in the pretreatment unit stove enters in the presintering unit stove through the material transmission channel, carry out presintering, material D in the charging air-exchanging chamber is after the bleeder valve of pretreatment unit stove cuts out, enter and carry out pretreating process in the pretreatment unit stove, get the 25KG ferric lithium phosphate precursor again, be numbered material E, enter in the charging air-exchanging chamber hopper pending.
Material A enters the hopper of discharging air-exchanging chamber, after sintering unit furnace discharge valve closure, equipment control circuit is opened the bleeder valve of discharging air-exchanging chamber, material falls in the Material pipeline 31 of the mechanism 8 that cools in the self gravitation effect, after material A enters feed tube fully, the bleeder valve of closed discharging air-exchanging chamber 7.The auger conveyer pushes material and moves to discharge port end, quickens heat exchange with tube wall, and feed tube is provided with the interlayer cover outward, the flow velocity of opening electromagnetism water valve cooling water 80L/min enters the interlayer cover by water inlet, flow out from delivery port, take away the heat of feed tube tube wall, shorten cooling the time.Material is transferred device and pushes to discharge port end after a period of time, control circuit cuts out the electromagnetism water valve and stops cooling water, open bleeder valve and improve auger conveyer rotating speed, push the LiFePO4 final products and enter the product storeroom from discharging opening 9, material A is finished whole sintering processes.Pretreatment unit stove, presintering unit stove, sintering unit stove all have material to handle at this moment, and whole microwave sintering apparatus enters continuous production status, and repetitive cycling is carried out above each technological process, and the realization heavy industrialization is produced continuously.
LiFePO 4 by microwaves of the present utility model heats vertical continuous production equipment a plurality of unit stove is set, can improve sintering efficient effectively, realize producing continuously, carry out industrialization large-scale production, calculated by 3 hours whole sintering process time, 600kg at least can manufacture a finished product every day, compare with common monomer industrial microwave oven sintering process, production efficiency has improved more than 3 times, and economize on electricity is more than 60%, and rate of finished products was brought up to more than 90% by 80% of the past.Improved more than 5 times than the production efficiency of traditional sintering furnace about 20 hours, economize on electricity is more than 80%, and industrial-scale production efficient and economic benefit are considerable.
Embodiment two: a kind of LiFePO 4 by microwaves heats vertical continuous production equipment, basic identical with embodiment one, description of drawings no longer, the content something in common no longer repeats, difference is that each unit body of heater material is a ceramic material, and auger conveyer material is a steel construction surface lining ceramic material in each unit stove; Microwave source links to each other with 5 groups of microwave tubes in each unit stove, and every group by 3 microwave tube parallel connections; Material transmission channel 4 cross sectional shapes are circular between each unit stove.
Embodiment three: a kind of LiFePO 4 by microwaves heats vertical continuous production equipment, and is basic identical with embodiment one, description of drawings no longer, and the content something in common no longer repeats, and difference is that auger conveyer material is a stainless steel material in each unit stove; Microwave source links to each other with 8 groups of microwave tubes in each unit stove, and every group by 3 microwave tube parallel connections; Material transmission channel 4 cross sectional shapes are rectangle between each unit stove.
Embodiment four: the vertical continuous production equipment of a kind of LiFePO 4 by microwaves heating deflection, referring to Figure 11, to number identically with embodiment one, and the content something in common no longer repeats.Difference is pretreatment unit stove 3, presintering unit stove 5 and sintering unit stove 6, each unit body of heater is a closed inclination hollow cylindrical, and its axis normal cross sectional shape is an annular, the vertical layout of the parallel deflection of each unit stove, angle of deviation is α, α=85 °.The operation of entire equipment and production procedure and embodiment one are basic identical, no longer repeat.
Embodiment five: the vertical continuous production equipment of a kind of LiFePO 4 by microwaves heating deflection, and basic identical with embodiment four, description of drawings no longer, the content something in common no longer repeats, and difference is that each unit tilting furnace arranges that the inclination angle is α, α=80 °; Each unit body of heater material is a ceramic material, and auger conveyer material is a steel construction surface lining ceramic material in each unit stove; Microwave source links to each other with 5 groups of microwave tubes in each unit stove, and every group by 3 microwave tube parallel connections; Material transmission channel cross sectional shape is circular between each unit stove.
Embodiment six: the vertical continuous production equipment of a kind of LiFePO 4 by microwaves heating deflection, basic identical with embodiment four, description of drawings no longer, the content something in common no longer repeats, difference is each unit tilting furnace layout, the inclination angle is α, α=95 °, and each unit furnace discharge mouth is located at a side; Auger conveyer material is a stainless steel material in each unit stove; Microwave source links to each other with 8 groups of microwave tubes in each unit stove, and every group by 3 microwave tube parallel connections; Material transmission channel cross sectional shape is a rectangle between each unit stove.
Embodiment seven: the vertical continuous production equipment of a kind of LiFePO 4 by microwaves heating deflection, basic identical with embodiment four, description of drawings no longer, the content something in common no longer repeats, difference is each unit tilting furnace layout, the inclination angle is α, α=100 °, and each unit furnace discharge mouth is located at a side.
The above, it only is the utility model preferred embodiment, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.

Claims (10)

1. a LiFePO 4 by microwaves heats vertical continuous production equipment, it is characterized in that: comprise charging aperture, the charging air-exchanging chamber, the pretreatment unit stove, presintering unit stove, sintering unit stove, the discharging air-exchanging chamber, discharging mechanism cools, discharging opening, vacuum extractor, protective gas input unit and equipment control circuit, the pretreatment unit stove, presintering unit stove, sintering unit stove three cover unit stoves, contain unit stove charging aperture equally, the unit body of heater, the outer micro-wave screening insulation construction layer of unit body of heater, microwave source, a certain number of microwave tube, at least one is advanced exhaust tube, unit furnace discharge mouth, unit furnace discharge valve, the auger conveyer, each vacuum degree is installed in each unit body of heater at least surveys probe, temperature measurement probe and pressure measxurement probe, the unit body of heater is the vertical hollow cylindrical of closed, its horizontal cross sectional geometry is an annular, the unit body of heater is wrapped with the outer micro-wave screening insulation construction layer of unit body of heater, unit stove charging aperture is positioned at body of heater upper surface, unit one side, unit furnace discharge mouth is positioned at body of heater lower surface, unit one side, unit furnace discharge mouth is provided with unit furnace discharge valve, microwave source is arranged in unit body of heater outer periphery and links to each other with microwave tube, microwave tube is arranged on the furnace body outer wall, advancing exhaust tube is communicated with unit body of heater inner chamber, be communicated with vacuum extractor and protective gas input unit by the band valve pipe, auger conveyer axis is installed in the unit body of heater with approximate coincidence of unit body of heater axis direction, it links to each other with the drive unit that is located at body of heater upper and lower end face, unit respectively at two ends up and down, vacuum degree is surveyed probe, temperature measurement probe and pressure measxurement probe are installed in inboard wall of furnace body top, unit, are connected with the equipment control circuit corresponding circuits by data wire; The vertical vertical layout of three cover unit stoves; be communicated with in proper order by the material transmission channel between the unit stove; charging aperture is communicated with pretreatment unit stove charging aperture near vertical by the charging air-exchanging chamber; pretreatment unit furnace discharge mouth is communicated with by the material transmission channel with the charging aperture of presintering unit stove; the discharging opening of presintering unit stove is communicated with by the material transmission channel with the charging aperture of sintering unit stove; the discharging opening of sintering unit stove is communicated with cool discharging mechanism and discharging opening by the discharging air-exchanging chamber; each unit stove; the charging air-exchanging chamber; vacuum extractor; the protective gas input unit; the discharging air-exchanging chamber; the discharging mechanism that cools is connected with the equipment control circuit corresponding circuits by data wire.
2. the vertical continuous production equipment of microwave heating according to claim 1, it is characterized in that: microwave source links to each other with certain group of number microwave tube in described each unit stove, every group by the parallel connection of some microwave tubes, microwave tube is arranged on the unit furnace body outer wall, or be arranged in around the unit body of heater, wherein pretreatment unit stove, presintering unit stove microwave source power are 10～15kw, and sintering unit stove microwave source power is 30～100kw; Each unit body of heater is provided with a blast pipe at least, and advance the to bleed mouth of pipe and exhaust pipe mouth are equipped with microporous filter; Described each unit body of heater material is the optional one of quartz glass, pottery, and the auger conveyer is that quartz glass, steel construction surface serve as a contrast ceramic material, stainless steel is optional wherein a kind of; Material transmission channel cross sectional shape is fan-shaped, rectangle, circular optional one between described each unit stove.
3. the vertical continuous production equipment of microwave heating according to claim 1, it is characterized in that: described charging air-exchanging chamber, comprise that hopper, inlet valve, bleeder valve, vacuum degree survey probe and at least one and advance exhaust tube, the hopper upper port is communicated with charging aperture, lower port is communicated with pretreatment unit stove charging aperture, hopper upper and lower end portion is provided with inlet valve and bleeder valve respectively, advance the exhaust tube opening and be arranged on the hopper upper inside wall, be communicated with vacuum extractor by the band valve pipe, vacuum degree is surveyed probe and is installed in the hopper upper inside wall; Described discharging air-exchanging chamber, comprise that hopper, bleeder valve, vacuum degree survey probe and at least one and advance exhaust tube, the hopper upper port is communicated with sintering unit furnace discharge mouth, lower port is communicated with the discharging mechanism that cools, bleeder valve is located at the hopper bottom, advance the exhaust tube opening and be arranged on the hopper upper inside wall, be communicated with vacuum extractor by the band valve pipe, vacuum degree is surveyed probe and is installed in the hopper upper inside wall.
4. according to the vertical continuous production equipment of the described microwave heating of the arbitrary claim of claim 1～3, it is characterized in that: the described discharging mechanism that cools, comprise Material pipeline, the interlayer cover, water inlet, delivery port, the auger conveyer, bleeder valve, Material pipeline is a stainless steel, the interlayer cover is wrapped on the Material pipeline pipeline outer wall, the one end is provided with water inlet, the other end is provided with delivery port, the auger conveyer is installed in material conveying pipe inside, outer with being located at the outer both ends of the surface of the pipeline respectively auger conveyer drive unit in its two ends links to each other, and bleeder valve is located at discharging opening top.
5. the vertical continuous production equipment of microwave heating according to claim 4, it is characterized in that: described equipment control circuit contains touch-screen, and touch-screen is communicated with pretreatment unit stove PLC control circuit, presintering unit stove PLC control circuit, sintering unit stove PLC control circuit, the charging ventilation/discharging discharging PLC control circuit of taking a breath/cool respectively by data/address bus; Described pretreatment unit stove PLC control circuit, presintering unit stove PLC control circuit, sintering unit stove PLC control circuit, contain unit stove PLC, PLC external circuits, unit stove signal acquisition circuit equally, auger driving device controls circuit, the microwave source control circuit, the air extractor control circuit; Described PLC external circuits, the hand switch that contains the some that links to each other with input, the switching signal circuit of signal acquisition circuit, and the servo-driver that links to each other with output, unit furnace discharge valve control ac contactor coil, protective gas control ac contactor coil, venting control ac contactor coil, vacuum pump control ac contactor coil, microwave source control ac contactor coil and indicator light; Described unit stove signal acquisition circuit contains input and links to each other with unit stove vacuum degree probe, the vacuum meter that output links to each other with unit stove PLC input, input links to each other with unit furnace temperature measuring probe, the temperature controller that output links to each other with unit stove PLC input links to each other with unit furnace pressure power measuring probe with input, the pressure controller that output links to each other with unit stove PLC input; Described auger conveyer drive unit drive circuit contains the servo-driver that an end links to each other with two-phase power supply, and servo-driver connects the output of servomotor and unit stove PLC; Described microwave source control circuit, the microwave transformer that contains the some that links to each other with three phase mains, hold the microwave tube circuit that links to each other with the microwave transformer, be in series with a contact of temperature control protection switch and multiconductor A.C. contactor on the former end incoming line of microwave transformer, the output of the coil linkage unit stove PLC of A.C. contactor; Described air extractor control circuit contains the A.C. contactor that an end links to each other with three phase mains, and the other end of A.C. contactor links to each other with the air extractor motor by circuit breaker, the coil linkage unit stove PLC output of A.C. contactor; Described touch-screen and pretreatment unit stove PLC control circuit, presintering unit stove PLC control circuit, sintering unit stove PLC control circuit, the charging ventilation/discharging discharging PLC control circuit of taking a breath/cool is communicated with by the RS422/485 bus.
6. a LiFePO 4 by microwaves heats the vertical continuous production equipment of deflection, it is characterized in that: comprise charging aperture, the charging air-exchanging chamber, the pretreatment unit stove, presintering unit stove, sintering unit stove, the discharging air-exchanging chamber, discharging mechanism cools, discharging opening, vacuum extractor, protective gas input unit and equipment control circuit, the pretreatment unit stove, presintering unit stove, sintering unit stove three cover unit stoves, contain unit stove charging aperture equally, the unit body of heater, the outer micro-wave screening insulation construction layer of unit body of heater, microwave source, a certain number of microwave tube, at least one is advanced exhaust tube, unit furnace discharge mouth, unit furnace discharge valve, the auger conveyer, each vacuum degree is installed in each unit body of heater at least surveys probe, temperature measurement probe and pressure measxurement probe, the unit body of heater is the vertical hollow cylindrical of closed, its horizontal cross sectional geometry is an annular, the unit body of heater is wrapped with the outer micro-wave screening insulation construction layer of unit body of heater, unit stove charging aperture is positioned at body of heater upper surface, unit one side, unit furnace discharge mouth is positioned at body of heater lower surface, unit one side, unit furnace discharge mouth is provided with unit furnace discharge valve, microwave source is arranged in unit body of heater outer periphery and links to each other with microwave tube, microwave tube is arranged on the furnace body outer wall, advancing exhaust tube is communicated with unit body of heater inner chamber, be communicated with vacuum extractor and protective gas input unit by the band valve pipe, auger conveyer axis is installed in the unit body of heater with approximate coincidence of unit body of heater axis direction, it links to each other with the drive unit that is located at body of heater upper and lower end face, unit respectively at two ends up and down, vacuum degree is surveyed probe, temperature measurement probe and pressure measxurement probe are installed in inboard wall of furnace body top, unit, are connected with the equipment control circuit corresponding circuits by data wire; The vertical layout of the three cover parallel deflections of unit stove; angle of deviation is α; be communicated with in proper order by the material transmission channel between the unit stove; charging aperture is communicated with pretreatment unit stove charging aperture by the charging air-exchanging chamber; pretreatment unit furnace discharge mouth is communicated with by the material transmission channel with the charging aperture of presintering unit stove; the discharging opening of presintering unit stove is communicated with by the material transmission channel with the charging aperture of sintering unit stove; the discharging opening of sintering unit stove is communicated with cool discharging mechanism and discharging opening by the discharging air-exchanging chamber; each unit stove; the charging air-exchanging chamber; vacuum extractor; the protective gas input unit; the discharging air-exchanging chamber; the discharging mechanism that cools is connected with the equipment control circuit corresponding circuits by data wire.
7. the vertical continuous production equipment of microwave heating deflection according to claim 6, it is characterized in that: microwave source links to each other with certain group of number microwave tube in described each unit stove, every group by the parallel connection of some microwave tubes, microwave tube is arranged on the unit furnace body outer wall, or be arranged in around the unit body of heater, wherein pretreatment unit stove, presintering unit stove microwave source power are 10～15kw, and sintering unit stove microwave source power is 30～100kw; Each unit body of heater is provided with a blast pipe at least, and advance the to bleed mouth of pipe and exhaust pipe mouth are equipped with microporous filter; Described each unit body of heater material is the optional one of quartz glass, pottery, and the auger conveyer is that quartz glass, steel construction surface serve as a contrast ceramic material, stainless steel is optional wherein a kind of; Material transmission channel cross sectional shape is fan-shaped, rectangle, circular optional one between described each unit stove; The vertical layout of each unit stove deflection, unit body of heater axis downwards and the horizontal direction angle be skew angle, 80 °≤α≤100 °.
8. the vertical continuous production equipment of microwave heating deflection according to claim 6, it is characterized in that: described charging air-exchanging chamber, comprise that hopper, inlet valve, bleeder valve, vacuum degree survey probe and at least one and advance exhaust tube, the hopper upper port is communicated with charging aperture, lower port is communicated with pretreatment unit stove charging aperture, hopper upper and lower end portion is provided with inlet valve and bleeder valve respectively, advance the exhaust tube opening and be arranged on the hopper upper inside wall, be communicated with vacuum extractor by the band valve pipe, vacuum degree is surveyed probe and is installed in the hopper upper inside wall; Described discharging air-exchanging chamber, comprise that hopper, bleeder valve, vacuum degree survey probe and at least one and advance exhaust tube, the hopper upper port is communicated with sintering unit furnace discharge mouth, lower port is communicated with the discharging mechanism that cools, bleeder valve is located at the hopper bottom, advance the exhaust tube opening and be arranged on the hopper upper inside wall, be communicated with vacuum extractor by the band valve pipe, vacuum degree is surveyed probe and is installed in the hopper upper inside wall.
9. according to the vertical continuous production equipment of the described microwave heating deflection of the arbitrary claim of claim 6～8, it is characterized in that: the described discharging mechanism that cools, comprise Material pipeline, the interlayer cover, water inlet, delivery port, the auger conveyer, bleeder valve, Material pipeline is a stainless steel, the interlayer cover is wrapped on the Material pipeline pipeline outer wall, the one end is provided with water inlet, the other end is provided with delivery port, the auger conveyer is installed in material conveying pipe inside, outer with being located at the outer both ends of the surface of the pipeline respectively auger conveyer drive unit in its two ends links to each other, and bleeder valve is located at discharging opening top.
10. the vertical continuous production equipment of microwave heating deflection according to claim 9, it is characterized in that: described equipment control circuit contains touch-screen, and touch-screen is communicated with pretreatment unit stove PLC control circuit, presintering unit stove PLC control circuit, sintering unit stove PLC control circuit, the charging ventilation/discharging discharging PLC control circuit of taking a breath/cool respectively by data/address bus; Described pretreatment unit stove PLC control circuit, presintering unit stove PLC control circuit, sintering unit stove PLC control circuit, contain unit stove PLC, PLC external circuits, unit stove signal acquisition circuit equally, auger driving device controls circuit, the microwave source control circuit, the air extractor control circuit; Described PLC external circuits, the hand switch that contains the some that links to each other with input, the switching signal circuit of signal acquisition circuit, and the servo-driver that links to each other with output, unit furnace discharge valve control ac contactor coil, protective gas control ac contactor coil, venting control ac contactor coil, vacuum pump control ac contactor coil, microwave source control ac contactor coil and indicator light; Described unit stove signal acquisition circuit contains input and links to each other with unit stove vacuum degree probe, the vacuum meter that output links to each other with unit stove PLC input, input links to each other with unit furnace temperature measuring probe, the temperature controller that output links to each other with unit stove PLC input links to each other with unit furnace pressure power measuring probe with input, the pressure controller that output links to each other with unit stove PLC input; Described auger conveyer drive unit drive circuit contains the servo-driver that an end links to each other with two-phase power supply, and servo-driver connects the output of servomotor and unit stove PLC; Described microwave source control circuit, the microwave transformer that contains the some that links to each other with three phase mains, hold the microwave tube circuit that links to each other with the microwave transformer, be in series with a contact of temperature control protection switch and multiconductor A.C. contactor on the former end incoming line of microwave transformer, the output of the coil linkage unit stove PLC of A.C. contactor; Described air extractor control circuit contains the A.C. contactor that an end links to each other with three phase mains, and the other end of A.C. contactor links to each other with the air extractor motor by circuit breaker, the coil linkage unit stove PLC output of A.C. contactor; Described touch-screen and pretreatment unit stove PLC control circuit, presintering unit stove PLC control circuit, sintering unit stove PLC control circuit, the charging ventilation/discharging discharging PLC control circuit of taking a breath/cool is communicated with by the RS422/485 bus.
CN2009202763933U 2009-12-11 2009-12-11 Microwave-heating vertical continuous LiFePO4 production apparatus Expired - Lifetime CN201667733U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI468081B (en) * 2012-03-07 2015-01-01 Chien Te Hsieh Device of microwave reactor
CN105101501A (en) * 2014-05-08 2015-11-25 南京三乐微波技术发展有限公司 Dewatering dehumidifying system used for microwave heating system
CN109158200A (en) * 2018-10-31 2019-01-08 上海成界制药设备有限公司 A kind of modified form discharging device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI468081B (en) * 2012-03-07 2015-01-01 Chien Te Hsieh Device of microwave reactor
CN105101501A (en) * 2014-05-08 2015-11-25 南京三乐微波技术发展有限公司 Dewatering dehumidifying system used for microwave heating system
CN105101501B (en) * 2014-05-08 2017-01-11 南京三乐微波技术发展有限公司 Dewatering dehumidifying system used for microwave heating system
CN109158200A (en) * 2018-10-31 2019-01-08 上海成界制药设备有限公司 A kind of modified form discharging device

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