The function of boiler dust collector is to remove particulate smoke and dust from boiler fuel and combustion emissions, thereby significantly reducing the amount of smoke and dust discharged into the atmosphere. This is an important environmental protection equipment for improving environmental pollution and air quality.

The following measures are taken in the dust collector system:

(1) Insulation measures must be taken at the inlet pipe, body, and ash hopper of the boiler dust collector to prevent condensation of the dust collector.

(2) Temperature detection and automatic alarm devices are installed at the inlet and outlet of the boiler dust collector, and a cold air inlet device is installed at the inlet. Once the flue gas exceeds the operating temperature range of the bag filter, an alarm will sound and automatic temperature control measures will be taken to ensure the safe operation of the dust collector.

(3) The boiler dust collector is equipped with electric heating and vibration devices on the ash hopper, which avoids the problem of strong ash accumulation caused by low temperature.

Working principle of boiler dust collector:

(1) Pre separation: The dusty gas discharged from the shaft kiln enters the inlet manifold at the center of the dust collector through the flue, and under the negative pressure generated by the induced draft fan of the dust removal system, it uniformly enters the various bag chambers of the dust collector above the center of the ash hopper. The coarse particles in the dusty flue gas directly fall into the ash hopper due to the obstruction of the guide plate and the effect of its own gravity, completing the pre separation of dust.

(2) Filtering: The dust containing gas from the boiler dust collector enters the filter bag through the flower plate hole, and the dust is trapped on the inner surface of the filter bag. The dust containing gas is purified by filtering through the filter bag, and the purified gas enters the bag chamber. Then, it is discharged into the atmosphere through the lifting switching valve exhaust channel and exhaust pipeline, and discharged into the atmosphere by the exhaust fan. This dust collector is a top outlet, negative pressure operated internal filter dust collector.

(3) The cleaning method can be divided into two types: fixed time and fixed resistance. Timed dust cleaning is a process that follows a time program, with each room automatically taking turns cleaning according to adjustable time parameters. The cleaning cycle of the boiler dust collector can be adjusted in six stages within 0-2.5 hours, with each room cleaning time ranging from 10 seconds to 3 seconds per minute.

The timed dust cleaning control is to sample the pressure difference between the inlet and outlet of the dust collector, and convert it into an electrical signal through a differential pressure transmitter to carry out dust cleaning. The working process is as follows: the inlet and outlet pressure measuring device, differential pressure transmitter, dust cleaning controller, relay, solenoid valve, cylinder lifting switching valve. In addition to the above two control methods, a manual control mechanism is also set up to manually control the normal dust cleaning. For the convenience of operation and management, it is recommended to use a timed dust cleaning method.

(4) The temperature of the flue gas in the temperature controlled vertical kiln generally fluctuates within the range of 60-300 ° C, and the moisture content of the flue gas fluctuates within the range of 4-12%. In order to prevent the occurrence of serious accidents such as condensation and bag burning due to high temperature in the boiler dust collector.