A common fault analysis of asphalt mixing plant - the fault and solution of the dust collector

1. Dust leakage

Open the upper cover plate of baghouse dust collector, and check for cloth bag, take corresponding measures according to condition. Cleaning dust on the top of upper chamber, check if there is dust into the bag.

2. The problem of bag

a. the temperature of dust gas is too high

The temperature of dust gas must not exceed the maximum allowable temperature. The cloth bag can generally be under 200℃ high temperature, if the inlet temperature more than this value, the damper should be opened for the introduction of cold air cooling.

b. the humidity is too large

The bag is blocked if the climate is wet, so the wet cloth bag should be dried or replaces a new bag.

c. dust accumulation

If the dust accumulates at the bottom of the bag in the dust collector, the bag will accelerate wear. At this time, you shall check the running status of dust discharging device and check for leaks, and take corresponding measures.

d. bag wear

The inside of bag is dirty, because the dust is into the bag, which also caused the wear. In addition, if the dust is accumulated in the powder outlet, in order to prevent bag damage, the powder feeding device of the dust collector should be checked and the dust bag should be replaced.

A common fault analysis of asphalt mixing plant - Cold aggregate supply system fault diagnosis and solution

Fault	Cause	solution
The bottom of the belt is damaged.	The environment temper is too high.	Take measures to cool
	Belt tension is insufficient to skid.	Adjust the belt tension
Premature belt breakage	Foreign matter into the bottom of belt.	Adjust the sweeper to ensure effective cleaning
	The pressure of sweeper is too large.	Adjust the sweeper balance beam position.
	The insufficient belt tension made idling.	Adjust the belt tension.
Belt wear	The roller entrained sediment	Regular inspection and cleaning
	Serious non-parallel rollers.	Adjust the parallelism
	Belt tension is insufficient	The tension of belt can be adjusted.
belt slippage	Belt tension is insufficient	Adjust the belt tension
	Belt with oil	Thoroughly clean
Belt to harden	Generate heat due to belt slippage	Adjust the belt tension
	Ambient temperature is too high	Take measures to cool
Belt quiver	The belt is too long	Install the roller in the two axis
	Improper belt tension	Properly adjust the belt tension

How to use asphalt mixing plant for saving energy

Asphalt mixing equipment is usually open-air operated and the aggregate is also piled up in the ground, Affected by rain, whose water content can be increased. So, fuel consumption is increased due to the increasing water content in the aggregate. It is the most effective way to reduce the water content of aggregate for saving energy. It has a good effect, as building good drainage, setting up the canopy, etc. The latest patent proposed: the wasteheat form asphalt mixing equipment produced can be available to preheat cold aggregate, which is a very good suggestion.

Classification Of Asphalt Mixing Plant

1. Press the production capacity can be divided into: small, medium and large.

The productivity of small is under 40t / h.

The productivity of medium is the 40 ~ 240t / h.

The productivity of large is in more than 240t / h.

2. Press the handling methods (migration methods) can be divided into: mobile, trailer and stationary.

Mobile is suitable for the oil and low-level county highway projects. The bin and the stirring pot with tires can vary form a place to place on the basis of the construction site.

Trailer may be usually used for road construction. The devices are on some trailers and assembled at the construction site.

Stationary is also called asphalt processing factory. The operation site of the devices is stationary. It is suitable for the urban road construction that is focus.

3. Press process methods (mixing methods) can be divided into: continuous asphalt drum mix plant and asphalt batch mix plant.

Continuous asphalt drum mix plant: the heating and drying of aggregate and the stirring of mixture are mandatory performed periodically. Aggregate is stirred by separation.

Asphalt batch mix plant, a pot and a pot. The time of stirring a pot of aggregate is 45 seconds to 60 seconds. its output is determined according to the model.

The technique and method of making modified asphalt

The production of modified asphalt can use a blending method, can also adopt secondary blending method. The mixing method and the mixed method are suitable for a blending method; the precursor method is suitable for secondary blending method.

(1) The mixing method

a. the way applies to a variety of modified asphalt by mixing technique;

b. the way is that the modifier is added to hot asphalt, by mechanical mixing strongly, is mixed with asphalt at high temperature to make the modified asphalt having a desired content of the modifier. The finished products can be use in the production of modified asphalt mixture.

c. with making modified asphalt by the way, the mixing time, asphalt mixing time, temperature, and stirring speed should be determined by test.

(2) The mixed method

a. it should adopt the high shear device or colloid mill;

b. Modified asphalt mixing time, temperature, and other parameters should be based on the different asphalt, modifier and equipment capacity to set,

c. the modified asphalt should be used with the production at the construction site, when break time storage, should be transferred to storage with continuously mixing or pump cycle. During storage the modified asphalt can not reduce the effect.

(3) The precursor method

a. the way applies to a variety of modified asphalt matrix by mixing technique;

b. the content of  modifier should be appropriate in the modified asphalt matrix, should be ensured according to the technical requirements, past experience and equipment status.

c. according to the content of the modified of the modified asphalt matrix, the modified should be made to the modified asphalt having a desired content of the modifier.

d. modified asphalt matrix and modified asphalt should be uniform mixing, and blending temperature should be appropriate. The modified asphalt should be producted when needed. when break time storage, should be transferred to storage with continuously mixing or pump cycle.