Principle classification and characteristics of Botou steelmaking dust collector

Principle classification and characteristics of boiler dust collector
The equipment that separates dust from flue gas is called dust collector or dust removal equipment. Boiler dust collector is a commonly used supporting equipment in boilers and industrial production. Its function is to remove the particulate smoke and dust in the boiler fuel and combustion exhaust gas, thereby greatly reducing the amount of smoke and dust discharged into the atmosphere. This is an important environmental protection equipment to improve environmental pollution and improve air quality.
According to different principles, boiler dust collectors can be divided into steam dust collectors, bag dust collectors, boiler desulfurization dust collectors, vertical kiln bag dust collectors, etc.
Shaft kiln bag dust collector
Detailed introduction of shaft kiln large bag dust collector
Working principle
Pre-separation: The dust-containing gas discharged from the shaft kiln enters the center of the dust collector through the flue. In the air main pipe, under the negative pressure generated by the induced draft fan of the dust removal system, it evenly enters each bag chamber of the dust collector above the center of the ash hopper. The coarse dust in the dust-containing flue gas falls directly into the dust collector due to the obstruction of the deflector and its own gravity. Ash hopper completes the pre-separation of dust.
Filtration: Dust-containing gas enters the filter bag through the hole in the flower plate. The dust is trapped on the inner surface of the filter bag. The dust-containing gas is filtered and purified by the filter bag. The purified gas enters the bag chamber and then passes through the lifting switching valve. The exhaust channel and air outlet pipe are discharged into the atmosphere by the exhaust fan. This dust collector is a top-exhaust air, negative pressure operated inner filter type dust collector. Dust cleaning methods can be divided into two methods: fixed time and fixed resistance. Scheduled dust cleaning is based on a time program. Each room automatically cleans dust in turn according to adjustable time parameters. The dust collector cleaning cycle is adjustable in six levels within an hour. The cleaning time of each room is six levels from seconds to 3 seconds. choose. Timing dust cleaning control is to sample the inlet and outlet pressure difference of the dust collector, and convert it into an electrical signal through a differential pressure transmitter to perform dust cleaning. The working process is as follows: The inlet and outlet pressure taking devices are cleaned by the differential pressure transmitter. In addition to the above two control methods, the ash controller, relay, solenoid valve, cylinder lift switching valve is also equipped with a manual control mechanism, which can manually control normal ash cleaning. For the convenience of operation and management, it is recommended to use regular dust cleaning method. 4. Temperature control The flue gas temperature of the vertical kiln generally fluctuates within a range, and the moisture content of the flue gas fluctuates within a - range, in order to prevent condensation in the dust collector and bag burning due to excessive temperature.
The following measures should be taken in this dust collector system:
(1) Insulation measures must be taken at the air inlet pipe, body and ash hopper of the dust collector to prevent condensation in the dust collector.
(2) Install temperature detection and automatic alarm devices at the air inlet and exhaust outlet of the dust collector, and install a cold air inlet device at the air inlet. Once the flue gas exceeds the operating temperature range of the bag dust collector, an alarm will occur and temperature control measures will be automatically taken to ensure the safe operation of the dust collector.
(3) Electric heating and rapping devices are installed on the ash hopper to avoid the problem of forced exposure and dust accumulation due to low temperature.
The boiler dust collector is suitable for dust removal, smoke elimination, and desulfurization. It has the characteristics of low resistance, flexible installation and layout, high desulfurization efficiency, and long service life!