CN202626352U

CN202626352U - Ingot melting state detection device for polycrystalline silicon ingot furnace

Info

Publication number: CN202626352U
Application number: CN 201220264334
Authority: CN
Inventors: 孙建江; 卫国军; 来迪文; 袁华中; 孙力锋
Original assignee: Zhejiang Jinggong Science and Technology Co Ltd
Current assignee: Zhejiang Jinggong Science and Technology Co Ltd
Priority date: 2012-04-13
Filing date: 2012-06-01
Publication date: 2012-12-26
Anticipated expiration: 2022-06-01
Also published as: CN102677165A

Abstract

The utility model discloses an ingot melting state detection device for a polycrystalline silicon ingot furnace. The detection device comprises a human-computer interface device, a programmable logic controller (PLC), an analogue-to-digital (A/D) conversion module, an output module, a temperature measurement thermoelectric couple and an alarm device, wherein the PLC is connected with the human-computer interface device, the A/D conversion module and the output module respectively; the A/D conversion module is connected with temperature measurement thermoelectric couple at the same time; and the output module is connected with the alarm device at the same time. By using the ingot melting state detection device for the polycrystalline silicon ingot furnace, the automatic operation of the judgment of the ingot melting state in the polycrystalline silicon ingot furnace can be realized, so that unnecessary energy consumption is reduced.

Description

Polycrystalline silicon ingot or purifying furnace ingot casting melted state proofing unit

Technical field:

The utility model relates to the polycrystalline silicon ingot casting production technical field, especially relates to a kind of polycrystalline silicon ingot or purifying furnace ingot casting melted state proofing unit.

Background technology:

Silicon is most important a kind of material in the photovoltaic industry, and purified silicon fusing point is 1414 ℃, and the polysilicon purity that is used for solar level is generally more than 99.99%.Polycrystalline silicon ingot or purifying furnace is a kind of silicon remelting device of specialty, is used to produce a large amount of qualified sun power and uses polycrystal silicon ingot, in process of production, the side's of recrystallizing into ingot after need polysilicon being melted fully.Whether melt fully for silicon raw material in the polycrystalline silicon ingot or purifying furnace at present and still can not realize automated operation, need manual work repeatedly to observe and judgement by rule of thumb, cause increasing a large amount of unnecessary energy consumptions.

The utility model content:

The purpose of the utility model is the weak point that exists to prior art and a kind of polycrystalline silicon ingot furnace ingot casting melted state proofing unit is provided; It can realize the automated operation that the ingot casting melted state is judged in the polycrystalline silicon ingot or purifying furnace, thereby reduces unnecessary energy consumption.

For realizing above-mentioned purpose; The polycrystalline silicon ingot or purifying furnace ingot casting melted state proofing unit of the utility model includes: human-computer interface device, PLC programmable logic controller, A/D modular converter, output module, temperature thermocouple and warning howler; Wherein, The PLC programmable logic controller links to each other with human-computer interface device, A/D modular converter and output module respectively, and the A/D modular converter links to each other with temperature thermocouple simultaneously, and output module then links to each other with warning howler simultaneously.

Preferred as technique scheme, described temperature thermocouple is a R type thermopair.

The beneficial effect of the utility model is: it measures the temperature of present position in real time through temperature thermocouple; And give the PLC programmable logic controller with data transmission via the A/D modular converter; The PLC programmable logic controller is judged the ingot casting melted state according to calculating temperature rise rate; When ingot casting melts fully, can report to the police, thereby realize the automated operation that the ingot casting melted state is judged in the polycrystalline silicon ingot or purifying furnace, reduce unnecessary energy consumption through warning howler.

Description of drawings:

Below in conjunction with accompanying drawing the utility model is done further explanation:

Fig. 1 is the proofing unit skeleton diagram of the utility model;

Fig. 2 is the detection method schema of the utility model.

Embodiment:

Be that example comes the utility model is done further explanation with the square ingot that adopts polycrystalline silicon ingot or purifying furnace to make 800 kilograms below.

In the polycrystalline silicon ingot or purifying furnace, adopt square flat quartz crucible as the crystal production container, holding of quartz crucible is of a size of 99mm (length) * 99mm (wide) * 495mm (height).

See shown in Figure 1: polycrystalline silicon ingot or purifying furnace ingot casting melted state proofing unit includes human-computer interface device 10, PLC programmable logic controller 20, A/D modular converter 30, output module 40, temperature thermocouple 50 and warning howler 60; Wherein, Temperature thermocouple 50 is a R type thermopair; And be installed in the position of 40mm under the crucible outer bottom; PLC programmable logic controller 20 links to each other with human-computer interface device 10, A/D modular converter 30 and output module 40 respectively, and A/D modular converter 30 links to each other with temperature thermocouple 50 simultaneously, and 40 whiles of output module link to each other with warning howler 60.

See shown in Figure 2: in crucible, put into the silicon raw material; Heating makes the fusing of silicon raw material; The temperature T that temperature thermocouple is recorded is input to the PLC programmable logic controller; And through PLC programmable logic controller accounting temperature T to the first order derivative of time, obtain the temperature rise rate T ' of temperature thermocouple position and be stored in the PLC programmable logic controller.

After temperature thermocouple records temperature T and surpasses 1200 ℃; Every through one minute; Temperature rise rate T ' the value of current record is deducted the temperature rise rate T ' value of record before ten minutes by the PLC programmable logic controller; Draw difference DELTA T ', judge silicon melting raw materials state according to the size of PM Δ T ' value; If Δ T ' 0.03 ℃/min, then silicon raw material not fusing fully; If 0.03 ℃/min Δ T ' 0.05 ℃/min, then the silicon raw material is in and is about to melt completion status; If Δ T '>0.05 ℃/min, then the silicon raw material melts fully, triggers output module and makes alarm equipment alarm, and the prompting fusing is accomplished, just can jump to the long brilliant stage this moment with the production of polysilicon system.

The above is merely the preferred embodiment of the utility model, does not therefore limit the protection domain of the utility model, and every equalization of doing according to the utility model changes with modifying and all belongs in the claim that the utility model contains.

Claims

1. polycrystalline silicon ingot or purifying furnace ingot casting melted state proofing unit; It is characterized in that: it includes: human-computer interface device, PLC programmable logic controller, A/D modular converter, output module, temperature thermocouple and warning howler; Wherein, The PLC programmable logic controller links to each other with human-computer interface device, A/D modular converter and output module respectively, and the A/D modular converter links to each other with temperature thermocouple simultaneously, and output module then links to each other with warning howler simultaneously.

2. polycrystalline silicon ingot or purifying furnace ingot casting melted state proofing unit according to claim 1 is characterized in that: described temperature thermocouple is a R type thermopair.