Low carbon and environmental protection construction in ecological cities, with desulfurization and denitrification technology and dust removal technology taking the lead

Low-carbon and environmental protection construction is an essential aspect of sustainable development in ecological cities. Desulfurization, denitrification technology, and dust removal technology play a significant role in achieving clean and healthy living environments.

1. Desulfurization technology:

Desulfurization technology is used to remove sulfur dioxide (SO2) from exhaust gases generated by coal-fired power plants, industrial boilers, and other fossil fuel-burning facilities. This technology converts sulfur dioxide into harmless by-products, such as sulfates, which can be used as fertilizers.

Key desulfurization technologies include:

a. Wet scrubbing: This method involves spraying a liquid absorbent solution onto the exhaust gas, capturing the sulfur dioxide and other pollutants. The absorbent solution is then regenerated and recycled through a solvent recovery system.

b. Dry scrubbing: This technology uses dry sorbents, such as limestone or activated carbon, to adsorb sulfur dioxide from the exhaust gas. The sorbent is then heated or treated to release the captured sulfur dioxide, which is converted into harmless by-products.

c. Electrostatic precipitation: This method utilizes electrostatic charges to collect particles containing sulfur dioxide and other pollutants from the exhaust gas. The collected particles are then removed from the system for disposal or reuse.

2. Denitrification technology:

Denitrification technology is employed to reduce nitrogen oxides (NOx) emissions from combustion processes. These technologies convert nitrogen oxides into nitrogen gas, which is harmless to the environment.

Key denitrification technologies include:

a. Selective catalytic reduction (SCR): This technology involves injecting a reductant, such as urea or ammonia, into the exhaust gas and passing it through a catalyst. The catalyst promotes the chemical reaction between the reductant and nitrogen oxides, converting them into nitrogen gas and water.

b. Non-selective catalytic reduction (NSCR): This method uses a catalyst to convert nitrogen oxides and other pollutants into harmless by-products without the need for a reductant.

c. Low-temperature selective catalytic reduction (LT-SCR): This technology is designed for engines operating at low temperatures. It uses a unique catalyst and reductant mixture to achieve denitrification at lower temperatures than traditional SCR systems.

3. Dust removal technology:

Dust removal technology is essential for controlling airborne particulate matter (PM) emissions from construction sites, coal mines, and other dust-generating activities. These technologies capture and filter dust particles, preventing them from reaching the atmosphere and causing respiratory diseases and other health problems.

Key dust removal technologies include:

a. Wet dust suppression: This method involves spraying water or other liquid solutions onto the dust-generating source, reducing the dust particles' mobility and preventing them from being released into the air.

b. Dry dust collection: This technology uses mechanical or electrostatic dust collectors to capture dust particles from the air. The collected dust is then disposed of or recycled for use in cement production or other applications.

c. Baghouse filtration: This system employs fabric bags or cartridges to filter dust particles from the air. The bags are periodically cleaned or replaced to maintain efficient dust removal.

By incorporating desulfurization, denitrification, and dust removal technologies into low-carbon and environmental protection construction, ecological cities can achieve cleaner air and healthier living environments for their residents. These technologies contribute to reduced greenhouse gas emissions, improved respiratory health, and a stronger commitment to sustainable development. Implementing these solutions will contribute to the overall goal of creating ecologically harmonious and livable cities for future generations.