The steam calciner in the drying equipment is a type of drum type reaction equipment for indirect heating of steam in the production of soda ash to decompose the material. The second furnace body consists of a furnace body, an alkali, an alkali, a heating and a transmission device. The second furnace body is a cylinder welded by a steel plate. The furnace body has two rolling rings on the front and rear sides of the furnace body. The furnace body is inclined backward by 1.5% to 2%. A gear ring is arranged near the end of the furnace ring, and the motor rotates through the reducer, the floating coupling and the gear ring. A screw conveyor is used for both the alkali and the alkali. The heating pipes in the furnace are arranged in a concentric circle and supported by the pipe rack. The outer wall of the heating tube has a spiral fin, and the end of the furnace is 2 to 4 m at the end of the furnace. The heavy alkali (sodium bicarbonate) and the return alkali are added to the furnace by the feeder, and are heated indirectly by the medium pressure steam in the heating tube as the furnace body rotates, and the heavy alkali is decomposed into soda ash. The produced soda ash mountain screw conveyor is discharged, and a part is returned to the furnace as a return alkali. At present, the emergence of self-back alkali, throwing and alkali steam forging furnace has made new progress in steam satin furnace.
First, the precautions for the use of steam calciner:
1. Always check the temperature of the 驮 wheel bearing and the sound of the bearing and the rotation of the bearing. If abnormal conditions are found, open the side cover to check the inside. If the problem is serious, stop the furnace for maintenance.
2. The friction surfaces should be kept well lubricated, and the lubricating oil and grease that meet the requirements for drying equipment should be used.
3. When the furnace is shut down, the furnace material should be cleaned, the condensed water should be drained and the steam valve should be cut off to prevent steam leakage.
4. After stopping the furnace, the manhole should be opened and enter the furnace to check whether there is any blockage of the block and whether the inner part is misplaced or fallen off.
5. It is strictly forbidden to beat the furnace and the rotary joint.
6. Regularly check the foundation sinking situation and adjust the height of the base of the 驮 wheel bearing according to the sinking value.
7. Keep the equipment clean and tidy, the insulation layer is complete, and the coating layer should not fall off.
8. Always check and tighten various connecting bolts.
Second, common faults of steam calcining furnaces and their treatment methods
The reason for the large amount of up and down movement of the furnace body is as follows:
1. The position of the wheel is not adjusted well; 2. The lubricating oil changes between the wheel and the ring; 3 the foundation sinks unevenly.
Approach:
1. Adjust the position of the wheel; 2. Check the oiling condition of each wheel and solve it; 3. Adjust the bearing seat gasket after the measurement.
Causes of furnace vibration:
1. The surface of the wheel and the raceway has a concave surface; 2. The gear ring and the pinion gear mesh poorly; 3. The wheel is worn or moved; 4. The connecting bolt of the bearing seat is loose.
Approach:
1. Repair or update; 2. Check and tighten the ring gear bolts; 3. Update or align; 4. Fasten.
Causes of difficulty in starting the furnace:
1. The furnace body is bent; 2. The end face seal is not disengaged; 3. The furnace has many materials and poor fluidity.
Approach:
1. Use the lifting tool to drive the car; 2. Disengage the moving and static sealing rings; 3. Use the lifting tool to drive the car.
Bearing temperature is too high:
1, lack of oil or oil is too dirty; 2, bearing damage; 3, the load of the wheel is too large; 4, the furnace body radiation and conduction heat is large; 5, the bearing clearance is small, the axial force is too large.
Approach:
1. Refueling or oil change; 2. Checking and updating; 3. Adjusting the wheel and feeding amount; 4. Preventing heat and increasing cooling water; 5. Improving the amount of clearance.
Seal ring wear is fast:
1, poor lubrication, into the debris; 2, the sealing surface pressure is too large; 3, the sealing ring is misaligned or skewed.
Approach:
1. Clean the oil hole and surface; 2. Reduce the pressure; 3. Try to adjust.
Causes of leakage of the rotary joint
1. The seal ring is worn or broken;
2, the filler is aging or insufficient pressure;
3. The central axis and the central axis of the furnace are misaligned.
Treatment method: 1. Replace the new one; 2. Replace the packing or tighten the gland bolt; 3. Adjust the suspension spring and the bellows to tighten the bar.
