Technical transformation scheme and commissioning of dryer for increasing production and reducing consumption

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Technical transformation scheme and debugging of dryer for increasing production and reducing consumption

Industrial use dryer Most of them are roller shaped, and the drying process is mainly through the effect of material lifting plate throwing and hot air convection. However, with the wide application of dryers, the dryers on the market are also mixed, which leads to the production process of many manufacturers can not reach the expected output, and the energy consumption is high. In view of the above problems, Hongxing dryer manufacturer Analyze the reasons and make technical transformation plan.

 dryer

1、 Cause analysis

1. The area of bulk material is small and the total air volume is less.

2. The air volume in the high temperature area is less, which leads to poor quick drying.

3. The gap between baffle and lifting plate is too large, resulting in serious leakage and short-circuit of air flow.

4. The sealing of partition board between air chambers failed, and the air channeling was serious.

 dryer

2、 Technical transformation plan

Based on the principle of small investment and good quality, combined with the actual operation of the dryer, the final technical transformation scheme is as follows:

1. The first section of the lifting board is widened from 2.7m to 3.3m, and the area is increased by 5.6m2; the low wall of the fourth section is thinned and the area is increased by 1.8m2, making its total area increase by 7.4m2. Replace the relevant baffle and lifting plate, modify the upper and lower rotating drum and baffle on site, and replace the new air duct system.

2. The outlet adopts multi unit air supply mode. Each unit is equipped with independent air duct and regulating valve. The opening of fan valve is adjusted according to the thickness of material layer and clinker particles in each area, so that the clinker can be dried at the discharge port.

3. The high temperature area is replaced by fan, the corresponding baffle is replaced, and the independent fan air supply system is installed to accelerate the drying of clinker in this area.

4. In high temperature area, ventilation side plate is set at the fine material side to protect the baffle on the side and reduce the influence of red river.

5. Repair the movable frame, replace the deformed drum, and re align.

6. Replace the air inlet pipe with high resistance to reduce pressure loss.

7. Optimize the fan configuration to meet the demand of increasing production.

8. Repair the leakage air lock system to reduce air leakage in the air chamber.

9. The utility model is a new type of sealing device on the rotating chamber to avoid air channeling.

 dryer

3、 Commissioning process

During the debugging, the control of the dryer was adjusted

1. Due to the increase of the area, the speed of the first stage transmission is reduced by 3 ~ 5 revolutions, and the pressure of the second stage is ensured to be 4.3 ~ 4.6kpa.

2. Due to the increase of production, the speed of the second stage is increased by 2-3 turns to ensure that the pressure of the fifth stage is 1.7-1.9kpa.

3. After the technical transformation, the rated air volume is increased by 79300m 3 / h, but the actual air volume is only increased by 20000 ~ 35000 m3 / h after calculation. During the commissioning, the fan damper is reasonably adjusted. The adjustment principle is to ensure the stable operation of the kiln. The air valve in the high temperature section is large, and the air valve in the low temperature section is small. The air volume must be reasonable. If the air volume is too small, the drying is poor. If the air volume is too large, the flame will be unstable, that is, the bad "fire head". Through practice, the reasonable control of fan damper has been ensured.

4. In this technical transformation, 4 fans were added and 3 fans were adjusted. The rated air volume was increased by 79300 m3 / h and the fan power was increased by 365 kW.

Before the transformation, during the operation, the air doors of the dryer 10 fan were fully opened by 98%. Because the power of the head row and high-temperature fan did not increase, and the air consumption of the kiln system should be very reasonable. After the transformation, in order to ensure the stable calcination, when the feeding rate is 175t / h, the newly added 4 fans are configured as follows: the air valve of side blowing blind plate fan is 15%, the fixed fan damper is 70%, and the second and third sections are two The air volume configuration of the original fan is as follows: the first stage fan and the second stage fan are controlled at 80%, the third stage fan damper is 70%, the fourth section fan damper is 60%, the fifth section fan damper is 40%, and the sixth section fan damper is 30%. When the output is increased to 180t / h, all the fan damper will increase by 5%; when the output is increased to 185t / h, all fan damper will be increased by 3%; when the output is increased to 188t / h, all fan damper will increase by 2%, and the side blowing blind plate fan will not be adjusted. After the transformation, the fan configuration can meet the output of 3000t / D, and there is plenty of room for increasing production.

Analysis of dryer problems Through the above-mentioned technical transformation scheme, the output of dryer has reached a new height, and the heat recovery efficiency has been significantly improved in terms of energy saving and consumption reduction. Red Star dryer manufacturer as a dryer manufacturer, the implementation of the dryer R & D, production and sales of one-stop service, after-sales problems are also very important to us. If necessary, please call 0371-67772626.

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