Boiler Smoke

The dust (including fly ash and carbon black), sulfur and nitrogen oxides contained in the boiler flue gas are all substances that pollute the atmosphere. Without purification, their emission indicators can reach several to tens of times that of environmental protection regulations. Measures to control the emissions of these substances include pre-combustion treatment, improved combustion technology, dust removal, desulfurization, and denitrification. The use of high chimneys can only reduce the concentration of pollutants in the atmosphere near the chimneys.

The forces used in flue gas dust removal include gravity, centrifugal force, inertial force, adhesion, acoustic waves, and static electricity. Gravity sedimentation and separation of inertial force are generally used for coarse particles. Centrifugal force is often used to separate dust at higher capacity. Electrostatic precipitators and bag filters have higher dust removal efficiency. The water droplets in wet and venturi-water film dust collectors can adhere to fly ash, have high dust removal efficiency and can absorb gaseous pollutants.

Since the 1950s, people have worked hard to develop comprehensive utilization of ash and slag to turn harm into profit. Such as the use of ash to make cement, bricks and concrete aggregates and other building materials. Since the 1970s, hollow microspheres have been extracted from fly ash and used as refractory and thermal insulation materials.

The future development of boilers will further improve the thermal efficiency of boilers and power stations; reduce the equipment cost per unit power of boilers and power stations; improve the operating flexibility and automation level of boiler units; develop more types of boilers to adapt to different fuels; improve boiler units and their Operational reliability of auxiliary equipment; reduce environmental pollution