Broken strange situation in the control operations integration and disposal

Successful experiences (1) after taking into account the expansion transformation may cause the actual coal warehouse cone pressure than the original increase, resulting in

pulverized coal flow variation. In order to increase the pulverized coal flow and a reduction of the compressed air into the water, in December 2006 at the end of the compressed

air into the coal

Flow system to help increase the pipeline before the dryer, and strictly control the coal moisture content does not exceed 1.0%. Also in the take-off artificial beat kiln coal   Semi-mobile crushing plant

silo cone and lower pulverized coal pipeline approaches to increase the mobility of .

(2) In order to prevent coal dust "knot arch", in January 2007 in the kiln silo cone adds air guns and vibration motor. After taking these measures, the phenomenon of broken

coal significantly improved, each class usually appear 1 to 2 times, each time 3 ~ 5min.

(3) In order to solve our broken coal kiln Pfister scale problems, in late June 2007 inspect the site and analyze that frequent the real reason for breaking coal flow aid

warehouse cone gas flow aid pipeline exports blocked, while gas shortage led to a flow aid, so that poor pulverized coal under aggregation  crushing equipment

. As production heavier tasks, not emptying the silo kiln handle this, the temporary transformation of the warehouse cone gas flow aid system, to be emptied after the planned

overhaul this thoroughly kiln coal warehouse processing. Temporary modification of specific measures are: to control the air flow past the solenoid valve

Instead straight into the style of the past after a plurality of solenoid valves removed, leaving only a total, annular flow aid directly from the main channel - on the next - a

few inflatable cone hose right positions.

Use effect after a period of use, the tail scales off coal phenomenon has been basically eliminated. Thereby stabilizing the kiln thermal system, avoiding the tail scales

frequently broken coal for clinker production quality. After transformation, the tail rotor load factor trend scales.

After transformation, the tail rotor load factor trend scales preheater system 2 partial pressure, temperature suddenly showing zero earlier in the kiln system during normal

operation, C1 ~ C4 cylinder and cone shaft preheater outlet temperature, pressure, all of a sudden by the normal becomes 0, the tertiary air temperature and pressure by the same

Normal value becomes 0, many a red alarm, the control operation screen. In this case, the control operator rapidly beating the air gun and notify local pressure field inspection

personnel check flap valve abnormalities hammer lever operation is flexible.

Preheater system pressure suddenly showing zero based on past experience, (a) when the preheater system clogging phenomenon are: ① gas pressure instability: clogging over many

parts of sharply negative, blocking parts (generally in the cyclone cone part) the following will soon decline even

To positive pressure; ② rapid temperature changes: clogged suspended in the air stream greatly reduced quantity of raw, raw materials and hot air can not be effectively heat

exchange, resulting in congestion levels over part of the temperature drop cyclone, blocking part of the following various parts of the abnormal temperature rise, especially in

blocking

Plug at the next level cyclone or calciner, because there is no raw material enters the gas temperature will surge; ③ often increased: (a) coal storage space; (2) coal and coal

storage warehouse within cones appear "knot arch", "scaffolding" phenomenon that can not be normal coal out of the warehouse; (3) raw coal silo and mill

The transfer device between failure or blockage. At this point, you must promptly find the mill feed interruption and fast processing; should also be closely monitored and out

into the grinding mill air temperature, because the temperature is too high to prevent spontaneous combustion or explosion of coal dust causes the mill feeding interruption time

More than 10min

Must stop grinding. February 2011 Henan a cement plant using bituminous coal mill coal feeding occur due to interrupt a long time, the control operator is not in a timely manner

into the mill hot air valve is closed, there is no cold air into the mill will be fully open valve, the results of wind temperature up to 150 ℃, coal mill bag filter dust bag

full within

Fire department, a considerable economic loss.

Coal mill electric ear vibration tendency anomaly coal mill electric ear vibration (grinding sound) meter installed in the field through the special structure of the probe, the

mill received the noise, the shielded cable to the instrument and converted to digital decibel instructions, while the output proportional with the decibel value 4 ~ 20mA

electric

Flow signal decibel value of the fill material is inversely proportional to the mill, the grinding media and the material is proportional to the weight ratio, so it can

quantitatively measure the size of the mill load. The operator can control the level of sound under ground coal flow into the mill, mill load in order to achieve the control of

the mill output

Highest and lowest power consumption. Coal mill normal production, electric ear vibration in a small range of fluctuation (), indicating incoming uniform mill load stable, then

mill the highest yield, lowest power consumption.