CN2093390U - Burnt zone temperature-measuring apparatus for cement rotary kiln - Google Patents

Abstract

The utility model discloses a burnt zone temperature-measuring apparatus for a cement rotary kiln, which is a non-contact type high-temperature measuring apparatus. The burnt zone temperature-measuring apparatus for a cement rotary kiln is suitable for the non-contact measurement of various industrial furnaces with the temperature of 1100 DEG to 1600 DEG, and is particularly suitable for the temperature measurement of the burnt zone for the cement rotary kiln. The burnt zone temperature-measuring apparatus for a cement rotary kiln uses the computer technology, and thus, the sampling is quick and continuous. The signal is taken out at the time when the mist strikes aside. An optical detector is a sealed box body with advantages of high temperature resistance and dust resistance, needs no routine maintenances, and can be positioned far away from a kiln door. The detected data is processed by a computer which has the functions of automatic display, automatic record printing and automatic music warning. A three-way digital-to-analog conversion with the precision of 12 bit is arranged. The output standard signal is connected with an automatic control system. The external dimension can be assembled with a three type instrument in a match way.

Description

Burnt zone temperature-measuring apparatus for cement rotary kiln

Cement rotary kiln clinkering zone temperature measurer is a kind of contactless high temperature measurement instrument, range ability 1100--1600 ℃ (can expand to 800--2000 ℃), be mainly used in cement rotary kiln clinkering zone thermometric, also can be used for other professional high temperature measurement of building materials.

The contactless temperature-measuring technology is used early, as infrared color comparison temperature measurement instrument, colorimetric pyrometer, radiation pyrometer all have been used for industry spot, but from the structure of these temperature measurers, the employing cemented prism optical spectroscopy that light path part has, have by the beam split of driven by motor chopper wheel, the temperature measurer of this structure is when thermal radiation temperature surpasses 50 ℃, prism comes unglued, and light path is obstructed.Chopper wheel divides the light time, because of individual movable part is arranged, more can't guarantee long-term continuous working, especially at cement rotary kiln clinkering zone thermometric, especially wet-process rotary kiln, because the high density dust in the kiln, smog and coal dust are deceived duration and degree of heating, to the interference of measuring, add the Effect of Hyperthermic Environment of kiln hood, the temperature detection of cement rotary kiln clinkering zone is never solved, long-term with flame and grog in the eye-observation kiln of seeing the firer, rely on experiential operating.

The purpose of this utility model is to rely on science data to control and instruct manufacture of cement, and the running rate that improves rotary kiln alleviates labor strength, and steady production improves the quality.

This temperature measurer is that the utilization skill is calculated machine technology, continuous sampling fast, the moment of utilizing smog to get out of the way is taken out signal, presses sampling in the every rotation of the Dayao 60--90 radian (time 6--18 second), thereby has overcome the interference of influence to measuring of black duration and degree of heating wind-engaging, material, coal in the kiln.

Optical detector is installed in the casing of a sealing of one meter far away of wicket tapping, pressure in the kiln weakens after being sprayed by the aperture very soon like this, granule dust can not hit the optical glass on the detector, prevent the detector laying dust, need to install quartz glass on the simultaneously original wicket, with dust hacking or the damage that will be taken out of by malleation in the kiln in several days, now, detector is contained in the dirt seal housing, as long as open a unlimited hole on the wicket, and needn't refill quartz glass, so not only heatproof but also dustproof, and do not need daily servicing, can install away from wicket.

The structural principle block scheme of this temperature measurer is as shown in Figure 1: it is by optical detector (1), A/D converter (2), computer system (3), LED digital indicator (4), given keyboard (5), music alarm (6), mini-printer interface (7) and mini-printer (8) and D/A converter unit such as (9) are formed.

Optical detector is according to heat radiation principle, receive the radiation spectrum of measured target, and be converted into and the corresponding electric signal output of temperature, this electric signal is converted to digital quantity through A/D and send computer system processor, signal after the processing send LED digital displaying temperature value and printer interface circuit on the one hand, timing automatic print record as required, convert 1 ┄ 5VDC to through D/A on the other hand, output of 4--20MA electric signal or figure shape show that automatic time typing and alarming value are imported by keyboard.

The embodiment of this temperature measurer as shown in Figure 2, the optical detector of forming by two photovoltaic detection sheets (1), after the radiation spectrum study of Confucian classics system meeting coalescence beam split with the rotary kiln clinkering zone, be detected the sheet reception and convert electric signal to, the ratio of the signal of two foil detectors is directly exported, and the size of this signal is directly proportional with the height of temperature.Probe body (11) is a square type seal case, is made by sheet metal, and high temperature resistant optical glass (12) is equipped with in the front, for measurement provides path.A/D converter (2) is selected 0809 chip for use, plays the analog to digital conversion effect, and computer system (3) is a complete single card microcomputer structure, divides two boards to install and forms.Clock circuit (10) select for use the 400MHZ crystal oscillator not frequency division directly import, more fast again than TP801 single card microcomputer clock frequency, continuous sampling fast, in the time of the every rotation of cement kiln 60--90 radian (6--18 second) be sampling processing, data by the sampling acquisition, after the machine system handles, identify the data of representation temperature as calculated, carry out temperature by LED charactron (4) and show.Also send simultaneously little interface circuit (7) of beating, as required by the automatic print record temperature value of mini-printer (8), the alarming value of the timed print of printer and bound alarm (6) is by given keyboard (5), is inserted by the user according to actual conditions.D/A converter is selected 8253 chips for use, constitute the digital to analog converter of 12 of triple channel, the digital quantity corresponding with temperature is converted to 1--5VDC, the analog quantity output of 4--20MA, be applicable to low-speed highly precise control, can not select 8 D/A chips for use if do not consider precision.If select the TP--801 single card microcomputer for use, CPV, CTCPIO should be replaced by A series, by (10) input clock frequency, RAM selects 6264 chips for use, sets up printer interface circuit and gets final product.

The advantage of this temperature measurer: do not use the circuit devcie that changes performance because of variations in temperature, photodetector is directly exported detectable signal, guarantees not to be acted upon by temperature changes. Light path partly adopts fixedly light splitting; each parts is disposable to be adjusted; immobilize; no movable member; guarantee to work reliably and with long-term; owing to adopt the dirt seal housing device, both protected the instrument camera lens, solved again the difficulty that quartz glass is installed at peep hole; the function of using temperature measurer instructs production; can improve working conditions, reduce labour intensity, temperature measurer has the automatic alarm writing function simultaneously; can make and see the firer in time pinpoints the problems and in time process; the operator also can heavily wait situation according to material KH saturation ratio and SM silica modulus and liter, and oneself formulates the bound alarming value, just can reach alarm in case overflow; this is to constant product quality; certain guarantee and facilitation have all been played in the long-term operation of kiln and safety in production; calcination to the control rotary kiln clinker realizes carrying out production strictly in line with rules and regulations the effective ways of scientific management.

Description of drawings:

Fig. 1 is the structural principle block scheme of temperature measurer

1 ┄ optical detector, 2 ┄ A/D converters

3 ┄ computer systems, 4 ┄ LED digital indicators

The given keyboard 6 ┄ music alarms of 5 ┄

The little interface 8 ┄ mini-printers of beating of 7 ┄

9 ┄ D/A converters

Fig. 2 is a temperature measurer example structure synoptic diagram

1 ┄ 9 is with Fig. 1 10 ┄ clock circuits

11 ┄ probe bodys, 12 ┄ optical glass

Claims (3)

1, cement rotary kiln clinkering zone temperature measurer is a kind of contactless high temperature measurement instrument, it is characterized in that: the optical detector that it is made up of two photovoltaic detection sheets (1), the radiation spectrum of rotary kiln clinkering zone is converted to and the corresponding electric signal output of temperature, this electric signal is through A/D converter (2), convert digital quantity to, send computer system (3), signal after machine is handled as calculated, send LED digital indicator (4) displays temperature value on the one hand, and printer interface circuit (7), timing automatic print record as required, through D/A converter (9), the digital conversion corresponding with temperature become 1--5VDC on the other hand, the electric signal output of 4--20MA, or figure shape shows that optical detector is installed in a seal case of 1 meter far away of wicket tapping.

2, temperature measurer as claimed in claim 1 is characterized in that the time of using computing machine to sample rapidly, continuously is 6--18 second, that is sampling in the cement kiln rotation 60--90 radian.

3, temperature measurer as claimed in claim 1 is characterized in that optical detector is installed in the rectangular seal case of being made by sheet metal, and high temperature resistant optical glass is equipped with in the seal box front.