What should I do before opening the kiln? The steps of opening the kiln and igniting how

1.There is no excessive ash accumulation in the smoke chamber of the kiln, so as not to affect the ventilation and uneven incoming materials after the kiln is opened. The mud around the retaining ring at the end of the kiln and the blanking pipe should be all cleaned out of the kiln, so as not to affect the ventilation and the flow of the slurry.

Keep the position of the blanking pipe correct, the pipeline is complete, and there is no deformation, cracks and abrasion, so as not to affect the blanking after the kiln is opened. The chain is intact, there is no broken end or wrong hanging, and the mud ring or ring root of the chain knot must be knocked off. The feeding nozzle in the kiln should be unobstructed.

The fire bricks are inlaid firmly, there is no loosening or head and tail inversion, and the thinnest part of the fire bricks that have not been replaced in the firing belt shall not be less than half of the thickness of the entire fire bricks. After the overhaul, the useless fire bricks and sundries in the kiln should be removed, and the bridge plate used for the maintenance of the smoke chamber should be taken out.

2.The thermocouple at the kiln tail and with a thermometer should be kept intact. Outside the kiln:

The wind ring between the front kiln mouth and the kiln head, and the rear kiln mouth and the smoke chamber should be tightly combined to prevent air leakage and material leakage. The working door and sampling hole on the kiln body should be covered, and the manholes and small doors under the smoke room at the end of the kiln should be closed to prevent ash and air leakage after the kiln is opened. The coal pipe is complete, the position is correct, the telescopic part is flexible, and there is no debris in the pipe, so as to prevent the flame shape and adjustment after the kiln is opened.

There is enough pulverized coal in the coal bunker, and the coal cutting device is easy to use. After cleaning the coal bunker, the chute of the coal cutting device should be poked open to prevent the coal from being wet and clumping and clogging, and the fire is extinguished due to the failure to get coal after ignition. The water cooling system has enough water and the water pipes are not clogged.

There is sufficient slurry circulation at the end of the kiln. The last test run of ancillary equipment such as coal windmill, exhaust fan, exhaust ram, and coal cutting system was carried out. Control Wheel:.

The switches of the control panel are flexible and easy to use. The indication of each instrument on the control panel is accurate and easy to use, and the pointer reading is at the zero position. The automatic recorder has recording paper and plenty of ink.

The signal devices and indicator lights on the control panel should be intact. After the above inspection and commissioning work are normal, the firewood can be stacked into the kiln.

First of all, the accessories and auxiliary equipment of the boiler should be comprehensively inspected, and the opening and closing positions of each valve should be checked correctly (the valves should be closed: the forward cut of the natural gas pressure reducing valve, the forward cut of the relaxation gas regulating valve, the boiler steam shut-off valve, the feed water shut-off valve, the pilot shower and the blowdown valve. Should open valve:

Boiler gas venting valve, steam venting valve, boiler level gauge root valve, each pressure gauge root valve, fan bearing cooling water valve, etc.), whether the indication of each pressure gauge is correct. Check whether the power supply, natural gas, instrument air, etc. meet the boiler operation requirements. Boiler feed water.

The boiler establishes the liquid level (about 50%). Send the power supply to the boiler control cabinet. If the "automatic" program starts the furnace, you need to close the power switch so that the computer controller can be powered by the display.

Before opening the pressure reducing valve of the natural gas main, cut the gas supply, replace it with a vent valve for 2 3 minutes, and close the vent valve. Turn the combustion "manual" knob to "automatic", "run and drain" knob to "run", press the "on" button of the computer controller, the "burner on" indicator light is on, and the computer is in working state. Start the "induced draft fan" and start the "burner" to ventilate and purge the furnace.

At this point, the computer controller enters the working program. The ignition procedure is automatically completed by the "combustion controller" in about a minute. If the ignition is unsuccessful, you need to press the "Combustion Fault Reset" button to enter the automatic ignition program again.

The contents of the boiler body inspection are unobstructed by the coal falling pipe, secondary air pipe, return pipe and slag discharge pipe. The hood is in good condition, the hood eye is unblocked, and the air shield is cleaned. The castables in the combustion chamber and the furnace are intact and do not fall off.

The length of the thermocouple in the furnace chamber is (200mm), and there is no obvious deformation and bending. There is no dust accumulation in the air chamber, the manhole is closed tightly, the hood is unblocked, and there is no leakage of the slag pipe. There is no debris and personnel in the upper flue of the furnace superheater, economizer and empty preheater, and the manhole door is closed.

The inside of the boiler body separator is clean and free of debris, and the manhole door is closed Check that there is no deformation of the central cylinder, no ash accumulation on the edge of the cylinder, and the flue at the inlet and outlet of the separator is clean and free of debris, and the castable is intact and does not fall off. The return bed of the return separation device is cleaned and the small eye of the hood is unblocked. The mouth of the ash pipe is intact, the ash pipe is unblocked, there is no air leakage, and the manhole door is closed.

There is no air leakage and no dust accumulation in the return air chamber, and the ash pipe plug plate is flexible and tightly closed. The return fan is qualified for trial operation, and the damper of the fan to be run is in the open state, and the pipe sections and valves of the steam water system should be complete and reliable, and the electric door should be powered. Each electric adjustment door should be opened and closed flexibly, and can be opened and closed tightly.

Superheater trap door, air exhaust valve manual and electric door opening, drum venting full. The steam drum and superheater header of the steam water system are opened on the spot and the remote pressure control valve is opened. Valves & Pipes Check Steam and furnace water sampling doors and drum dosing valves are opened.

The kiln firing time process is about one day and night.

First build the kiln door, light the kiln, the fuel is pine firewood, the Tsubaki technical guidance, measure the fire, grasp the kiln temperature changes, and decide the ceasefire time. The various process stages, production links and processes of the ceramic production process are connected with each other and closely cooperated, so that the product can have the shortest stroke, the least time and the least consumption in the production process.

Ceramic firing principle

In the green body of ceramics, there are generally tens of percent pores, and there is only point contact between the particles. During sintering, due to the increase in temperature, the transfer of substances occurs, that is, the mass transfer process, including evaporation and agglomeration, diffusion, viscous flow, plastic rheology, dissolution and precipitation.

In fact, the process of mass transport is complex, and several mass transfer mechanisms may work at the same time. But under different conditions, it may be that different mechanisms are dominant. During the sintering process, along with the grain boundaries.

As the area continues to expand, the green body becomes more dense. Therefore, the sintering process can use the shrinkage, porosity, and relative density of the green body.

and other indicators.

The specific steps are as follows:

1. Master and confirm the position of each valve of the rotary kiln, which mainly includes the inlet valve of the high-temperature fan and the valve of the air duct of the coal injection pipe of the kiln head.

2. Turn on the primary fan of the kiln head, adjust the wind speed to the standard value, and pay attention to the shape of the flame of the rotary kiln while the amount of oil injection increases.

3. Pay attention to prevent the danger of local overcombustion that may occur in the initial stage, because the temperature in the kiln is relatively low in the initial stage of the rotary kiln, and the combustion of fuel pulverized coal in the rotary kiln may not be sufficient in the case of low secondary air temperature, and there are potential safety hazards of combustion.

4. In the process of calcination, the basic principles of slow and orderly heating and continuous calcination process should be followed, and the temperature control of the rotary kiln should be paid attention to in this process.

5. The later stage is the key stage for the stability of clinker quality, and it is necessary to pay attention to the strict control of the temperature of the kiln head and kiln tail of the rotary kiln to ensure the stability of the negative pressure in the kiln.