CN201354321Y - Artificial intelligent controlled atmosphere bell-type two-stack resistance furnace for lithium iron phosphate thermal synthesis - Google Patents

Abstract

The furnace body is arranged on the furnace frame, a trolley used as a movable furnace door is arranged at the bottom of the furnace body, the trolley used for conveying samples is arranged on the rail and is connected with a lifting mechanism, the circulating cooling system is communicated with the top of the furnace body through a pipeline, and the atmosphere system, the furnace body, the circulating cooling system and the lifting mechanism are all connected with the artificial intelligent control system. The utility model relates to a simple structure is compact, low cost, easy and simple to handle, degree of automation is high, control accuracy is high, product quality is good lithium iron phosphate thermal synthesis uses two buttress resistance furnaces of artificial intelligence controllable atmosphere bell-type.

Description

The iron lithium phosphate thermal synthesis is piled up neatly resistance furnaces with artificial intelligence controlled atmosphere bell-jar two

Technical field

The utility model is mainly concerned with the apparatus field that is used for the iron lithium phosphate thermal synthesis, refers in particular to a kind of iron lithium phosphate thermal synthesis and piles up neatly resistance furnaces with artificial intelligence controlled atmosphere bell-jar two.

Background technology

The synthetic method of iron lithium phosphate mainly adopts high-temperature solid phase reaction method: with FeC2O4,2H2O, Li2CO3 and NH4H2PO4 or (NH4) 2HPO4 mix by stoichiometric ratio; under inert atmosphere protections such as argon gas or nitrogen; in about 300 ℃, mixture is tentatively decomposed; be warmed up to 600～800 ℃ then; insulation just can obtain the LiFePO4 material of peridotites crystal formation more than 12 hours.How preventing in heat treated process that ferrous oxidation from being the synthetic critical control point, also is the key issue that preparation equipment must solve.For cobalt acid lithium, lithium manganate, the preparation of LiFePO 4 material is high to equipment requirements.At present, the preparation of LiFePO 4 material all is to adopt intermittent apparatus basically in the world: as atmosphere protection bell jar stove, atmosphere protection box-type furnace etc.; More domestic units have carried out the pushed bat kiln that is used for iron lithium phosphate production in succession, meshbeltfurnace, the R and D of continuous fritting furnaces such as rotary kiln, and cooperate some iron lithium phosphate manufacturing enterprises trying out, obtained some results, but on stability and product sintering quality performance with external work very big distance in addition.

Pushed bat kiln, the meshbeltfurnace turnout can be bigger, but this kind type of furnace atmosphere protection adopts gas curtain mode (a kind of import, outlet are adopted towards nitrogen and formed the gas curtain protection), stove causes furnace pressure to change and because of nitrogen forms the fluctuation that gas curtain instability etc. causes the furnace atmosphere field because material is back to back, and can't satisfy the LiFePO 4 material sintering to atmosphere field (≤50ppm) stability requirement; The control of this kind type of furnace temperature adopts temperature control instrument that the temperature field is controlled, and heating unit and sintering powder are by the refractory materials indirect contact, and heating unit adopts cloth bar mode up and down, slower to the LiFePO 4 material temperature radiation, heat-up time is longer, can't satisfy high-precision requirement to the control in temperature field; Carry out sintering with rotary kiln, except that temperature, the atmosphere field defective the same with above-mentioned continuous oven, also has a fatal shortcoming, because LiFePO 4 material can produce a large amount of moisture content in process of cooling, the rotary kiln rotation can cause powder to mix the processing requirement that a large amount of moisture content causes satisfying material, above-mentioned three kinds of type of furnace types of cooling generally adopt the shell water-cooling pattern, the cooling that can not circulate of the heat in the burner hearth, and speed of cooling is slower.

The utility model content

Problem to be solved in the utility model just is: at the technical problem that prior art exists, the utility model provide a kind of simple and compact for structure, with low cost, easy and simple to handle, level of automation is high, control accuracy is high, the iron lithium phosphate thermal synthesis of good product quality is with artificial intelligence controlled atmosphere bell-jar two buttress resistance furnaces.

For solving the problems of the technologies described above, the solution that the utility model proposes is: a kind of iron lithium phosphate thermal synthesis is piled up neatly resistance furnaces with artificial intelligence controlled atmosphere bell-jar two, it is characterized in that: it comprises body of heater, circulating cooling system, grate, the atmosphere system, track and artificial intelligent control system, described body of heater is installed on the grate, the bottom of body of heater is provided with the dolly as movable fire door, being used for the dolly of sample presentation is installed on the track and with hoisting appliance and links to each other, circulating cooling system is connected with the top of body of heater by pipeline, described atmosphere system, body of heater, circulating cooling system and hoisting appliance all link to each other with the artificial intelligent control system.

Described body of heater is parallel cloth bar mode bell-jar sintering oven.

Described artificial intelligent control system comprises main control computer and expansion module and three temperature regulators that link to each other with main control computer respectively, oxygen level monitoring unit, pressure monitor unit, discharge alarm unit, dolly push-button control input block, temperature control module warning input block, globars protection grating detection system and the dolly position limitation protection of coming out of the stove, oxygen level monitoring unit and pressure monitor unit are installed in the body of heater, are used for monitoring intravital oxygen level of stove and pressure; Three temperature regulators are used for the intravital temperature of stove is monitored and controlled.

Compare with existing conventional art, advantage of the present utility model just is:

(1), Controlling System of the present utility model adopts unique fuzzy neuron network artificial intelligence collecting and distributing type Computer Control Technology that the temperature in the stove, atmosphere, pressure are realized centralized Control, simultaneously can set stove inner control program and make amendment in real time, can realize monitoring and data analysis in real time the temperature in the stove, atmosphere, pressure according to different processing requirements;

(2), temperature field of the present utility model adopts globars directly to divide in the 7 layers of stove that is arranged in parallel, carry out thermal radiation with a plurality of aspects of iron lithium phosphate powder, more traditional type of furnace radiation efficiency height conducts heat, and by three point for measuring temperature temperature controls, the fuzzy neuron network artificial intelligence computer control techniques by uniqueness can satisfy the control requirement of LiFePO 4 material to the temperature field fully;

(3), atmosphere field employing bell-jar sintering oven sealed structure of the present utility model, adopt multiple intake methods such as point, face, the end, terminal box, the point owing to obviously do not leak gas, and because the atmosphere eddy flow field that particular form produced of intake method can overcome the fluctuation of atmosphere field in the sintering process fully, can guarantee that iron lithium phosphate is in sintering process, not oxidation of ferrous iron is effectively protected and reaches atmosphere field blended consistence, and oxygen level can be controlled in 20 ppm;

(4), the utility model adopts unique exhaust-valve pressure control system to guarantee that furnace pressure keeps the operating pressure of needs;

(5), the type of cooling of the present utility model adopts interchanger to cooperate the circulation air cooling way, because the cooling circuit motor adopts hermetic water-cooled machine, cause the air-cooled loop of full cycle not have the gas leakage point, can guarantee the stable and blended consistence of atmosphere field in the big air quantity process of cooling, traditional relatively type of furnace, because be that a large amount of gases in the stove are adopted the air-cooled mode of pump circulation with frequency conversion fan by interchanger, cooling efficiency improves greatly.

Description of drawings

Fig. 1 is a main TV structure synoptic diagram of the present utility model;

Fig. 2 is a side-looking structural representation of the present utility model;

Fig. 3 is the control principle synoptic diagram of artificial intelligent control system in the utility model;

Fig. 4 is a upper of furnace body temperature controlling principle schematic in the utility model;

Fig. 5 is a body of heater middle part temperature controlling principle schematic in the utility model;

Fig. 6 is the control principle synoptic diagram of body of heater temperature of lower in the utility model;

Fig. 7 is the monitoring principle schematic of the interior temperature of body of heater in the utility model;

Fig. 8 is the control principle synoptic diagram of body of heater internal pressure in the utility model;

Fig. 9 is the control principle synoptic diagram of the interior oxygen level of body of heater in the utility model;

Figure 10 is the come out of the stove control principle synoptic diagram of position limitation protection of discharge alarm unit in the utility model, dolly push-button control input block, temperature control module warning input block, globars protection grating detection system, dolly;

Figure 11 is the control principle synoptic diagram of dolly lifting control in the utility model, big flow solenoid valve control, low discharge solenoid control, the control of cooling circuit butterfly valve, report to the police output control, temperature control module start and stop control, the start and stop of oxygen analyzer air pump.

Marginal data

1, body of heater 2, circulating cooling system

3, LiFePO 4 material 4, grate

5, atmosphere system 6, dolly

7, track 8, artificial intelligent control system

9, hoisting appliance

Embodiment

Below with reference to the drawings and specific embodiments the utility model is described in further details.

As depicted in figs. 1 and 2, iron lithium phosphate thermal synthesis of the present utility model is piled up neatly resistance furnaces with artificial intelligence controlled atmosphere bell-jar two, it comprises body of heater 1, circulating cooling system 2, grate 4, atmosphere system 5, dolly 6, track 7 and artificial intelligent control system 8, body of heater 1 is a five-way shell that is welded into by steel plate, liner is equipped with refractory materials and Heating element, inner lining material adopts corrosive materials such as the ability ammonia radical ion of import, green ion, builds cotton and fastening means and adopts unique technology mode.Body of heater 1 is installed on the grate 4, and body of heater 1 structure adopts parallel cloth bar mode bell-jar sintering oven.Circulating cooling system 2 is connected by the top of pipeline with body of heater 1, is used under the stable situation in guaranteeing body of heater 1 atmosphere field furnace gas being cooled off fast.The bottom of body of heater 1 is provided with the dolly 6 as movable fire door, is used for the dolly 6 of sample presentation to be installed on the track 7 and with hoisting appliance 9 and to link to each other.Atmosphere system 5 links to each other with body of heater 1; be used for providing enough protective gas for the LiFePO 4 material sintering; according to the requirement of iron lithium phosphate agglomerated material, adopt the pressure-fired Controlling System of finding time to guarantee at the beginning in conjunction with big flow inlet system that oxygen level is fallen rapidly in the stove and cause below the 50PPM.Atmosphere system 5, body of heater 1, circulating cooling system 2 and hoisting appliance 9 all link to each other with artificial intelligent control system 8.The dolly 6 that is used to load processed LiFePO 4 material 3 can rise to the working order of combining closely with body of heater 1 under hoisting appliance 9 effects of chain gear.Bell-jar sintering oven sealed structure is adopted in atmosphere of the present utility model field; adopt multiple intake methods such as point, face, the end, terminal box; the point owing to obviously do not leak gas; and because the atmosphere eddy flow field that particular form produced of intake method can overcome the fluctuation of atmosphere field in the sintering process fully; can guarantee iron lithium phosphate in sintering process, not oxidation of ferrous iron is effectively protected and reaches atmosphere field blended consistence.

Extremely shown in Figure 11 as Fig. 3, artificial intelligent control system 8 mainly is made up of temperature regulator regulator cubicle and the housing that computer and PLC module controls system are housed, mainly temperature, atmosphere, the real-time process curve of pressure in the stove are realized automatic follow-up control, to satisfy the sintering process requirement of LiFePO 4 material by computer.Referring to Fig. 3, the three-phase primary source is introduced by circuit breaker Q F1 in the present embodiment, temperature regulator JC101, JC102, JC103 input power supply is connected with AC power by melting RSF1～RSF3 soon, output control is connected with globars assembly GTBZ1～GTBZ6 respectively, circulation cooling air JO201 machine is by frequency transformer SC101, circuit breaker Q F2, QF7 is connected with AC power, dolly lifting motor JO101 is by alternating current contactor KM1, KM2, circuit breaker Q F2, QF7 is connected with AC power, oxygen analyzer AT101 is by transformer T1, circuit breaker Q F4, QF5, QF7 is connected with AC power, PLC control power ps 101 is by transformer T1, circuit breaker Q F4, QF7 is connected with AC power, refrigeration cycle water pump JO301 is by alternating current contactor KM3, circuit breaker Q F6, QF7 is connected with AC power, referring to Fig. 4, Fig. 5 and Fig. 6, in the present embodiment, three temperature control module TC101, TC102, TC103 all adopts the programmable logic controller of S7-300, by temperature sensor TE101, TE102, body of heater 1 top that TE103 monitors respectively, the temperature of middle part and bottom sends temperature control module TC101 to, TC102, TC103, temperature sensor TE101, TE102, TE103 all adopts thermopair WRN-130, TC101, TC102, control signal after TC103 will handle respectively sends JC101 to, JC102, JC103 realizes temperature Continuous Tracking control in the stove, JC101, JC102, JC103 can adopt PS16-300, TC101, TC102, TC103 sends signal to TI101 respectively, TI102, TI103 shows, and wherein imports by analog quantity between each parts, output expansion module SM331, SM332 connects.Referring to Fig. 7, gather body of heater 1 temperature inside by temperature sensor TE104, TE105, TE106, TE107, TE108, TE109, TE110 in the present embodiment and send display unit TI104, TI105, TI106, TI107, TI108, TI109, TI110 respectively to by S7300 analog quantity load module SM331.Referring to shown in Figure 8, body of heater 1 internal pressure sends PC101 to after being gathered by pressure unit PT101 in the present embodiment, and wherein PT101 adopts FB0803AE3R, and PC101 adopts S7-300.Pressure-controlling module PC101 adopts the programmable logic controller of S7-300, send PC101 by pressure transmitter to after with the collection of body of heater pressure inside, pressure transmitter adopts FB0803AE3R, control signal after PC101 will handle sends PV101 to and realizes the control of furnace pressure Continuous Tracking, PV101 can adopt 2702, PC101 sends signal to PI101 and shows, and wherein connects by analog quantity input, output expansion module SM331, SM332 between each parts.Referring to shown in Figure 9, the oxygen level of gathering body of heater 1 inside by sensors A T101 of the oxygen level in the body of heater 1 sends display unit AI101 to by S7300 analog quantity load module SM331 and shows in the present embodiment.Referring to shown in Figure 10, PLC links to each other and it is controlled with flow alarm unit, dolly push-button control input block, temperature control module warning input block, globars protection grating detection system, the dolly position limitation protection unit of coming out of the stove respectively in this example.Referring to shown in Figure 11, PLC respectively with car lifting control unit, big flow solenoid valve control unit, low discharge solenoid control unit, cooling circuit butterfly valve control unit, warning output control unit, temperature control module start and stop control unit, oxygen analyzer air pump control unit links to each other and it is controlled.

Principle of work: the earthen bowl that the operative employee will be equipped with LiFePO 4 material 3 is packed on the kiln furnitures of dolly 6, by 9 drivings of chain hoisting appliance dolly 6 is risen up in the body of heater 1, input technology sintering program on artificial intelligent control system 8 industrial computer, and download in the industrial computer, by industrial computer the pressure in the body of heater 1 is tested then, qualified back starts button operation sintering program on the industrial computer.Industrial computer is realized temperature, the atmosphere of technique initialization, the real-Time Tracking Control and the monitoring of pressure curve automatically by PLC control module whole process (intensification, constant temperature, temperature descending section), only finish the operation that industrial computer stops body of heater 1 inner heating device automatically, finish the technology sintering flow process of a complete iron lithium phosphate powder to the program run of technology sintering.Iron lithium phosphate thermal synthesis artificial intelligence controlled atmosphere bell-jar two buttress resistance furnaces are by seeing at institute of horizontal shopkeeper's magnetic central authorities operation result, the maximum sintering weight of every stove 60KG, and every technical indicator all satisfies processing requirement, and atmosphere, that consistent performance is followed the tracks of in the temperature field is good.The experimental prototype performance data is as follows:

(1) temperature curve

Room temperature is to high temperature section (800 ℃): 6～8h (180 ℃ begin to have the atmosphere requirement, and logical N2 protects, and O2 content is 50ppm);

Constant temperature zone (800 ℃): 10～16h (O2 content is less than 50ppm);

Constant temperature zone is to room temperature: 4～6h (O2 content is less than 50ppm);

(2) pine of powder dress is than being 0.4;

(3) production capacity: 60kg/d;

(4) gas CO2, the NH3 of Chan Shenging, H2O, CO (200 ℃ begin that gas evolution is arranged);

(5) temperature accuracy ± 5 ℃;

(6) gas flow: less than 10m3/h;

(7) kiln discharge temperature:＜80 ℃.

Analyze from principle, the utility model adopts the intermittent type sintering oven can address the problem than continous way sintering oven to the iron lithium phosphate sintering:

(1) atmosphere control does not have the moving material turnover easily, does not have continuous gas leakage point, can guarantee iron lithium phosphate in sintering process, and not oxidation of ferrous iron is effectively protected, thereby guarantees quality product.

(2) Temperature Field Control is more even, adopts the bell jar stove of parallel cloth rod, and its Heating element and product center are apart from little than continuous working kiln, thereby the heat transfer time is shorter.

(3) control of temperature and atmosphere is compared with continuous working kiln, can realize the accurate control of computer, guarantee product sintering industrialization volume production after, can realize the repeated amplification with the laboratory experiment result.

(4) the bell jar stove can be realized full-automatic operation, and the workman's amount that needs greatly reduces than continuous oven.

(5) the bell jar stove is a kind of production unit of highly flexibleization very flexibly, and manufacturing enterprise can organize at any time according to the order situation and produce or stopping production, and continuous oven is difficult to accomplish this point.One opens stove will keep the long period continuous production, otherwise loss is very big.

(6) production of bell jar stove and easily tissue are easy to the production management of enterprise.

The above only is a preferred implementation of the present utility model, and protection domain of the present utility model also not only is confined to the foregoing description, and all technical schemes that belongs under the utility model thinking all belong to protection domain of the present utility model.Should be pointed out that for those skilled in the art in the some improvements and modifications that do not break away under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (3)

1, a kind of iron lithium phosphate thermal synthesis is piled up neatly resistance furnaces with artificial intelligence controlled atmosphere bell-jar two, it is characterized in that: it comprises body of heater (1), circulating cooling system (2), grate (4), atmosphere system (5), dolly (6), track (7) and artificial intelligent control system (8), described body of heater (1) is installed on the grate (4), the bottom of body of heater (1) is provided with the dolly (6) as movable fire door, being used for the dolly (6) of sample presentation is installed on track (7) and goes up and link to each other with hoisting appliance (9), circulating cooling system (2) is connected by the top of pipeline with body of heater (1), described atmosphere system (5), body of heater (1), circulating cooling system (2) and hoisting appliance (9) all link to each other with artificial intelligent control system (8).

2, iron lithium phosphate thermal synthesis according to claim 1 is piled up neatly resistance furnaces with artificial intelligence controlled atmosphere bell-jar two, and it is characterized in that: described body of heater (1) is parallel cloth bar mode bell-jar sintering oven.

3, iron lithium phosphate thermal synthesis according to claim 1 and 2 is piled up neatly resistance furnaces with artificial intelligence controlled atmosphere bell-jar two, it is characterized in that: described artificial intelligent control system (8) comprises main control computer and expansion module and three temperature regulators that link to each other with main control computer respectively, the oxygen level monitoring unit, the pressure monitor unit, the discharge alarm unit, dolly push-button control input block, temperature control module warning input block, globars protection grating detection system and the dolly position limitation protection of coming out of the stove, oxygen level monitoring unit and pressure monitor unit are installed in the body of heater (1), are used for monitoring intravital oxygen level of stove and pressure; Three temperature control controllers are used for the temperature in the body of heater (1) is monitored and controlled.

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