Ⅰ. Desulphurization, Denitration and Dust Collection Principles

The high-pressure water mist is continuous and even, with small particle diameter minimized to Nano scale. Its specific surface area is far bigger than that of the common water mist. Also it has high-speed mist particle and high density, with many special properties: quickly absorbing heat and reducing temperature and greatly increasing the surface area of water film contacting the dust and gases like SO₂ and NO_x, thus easily removing the dust, NO_x and SO₂ through absorption, moistening, agglomeration and weight gaining in the gas state, liquid state and vaporizing state between them. In this way the high efficient desulphurization, denitration, dust collection and temperature reduction are realized.

Ⅱ. Desulphurization, Denitration and Dust Collection Process Flow

The high-pressure water mist desulphurization, denitration and dust collection technology adopts different process flows in accordance with boilers and industrial kilns of different types and local raw materials and fuels, as well as combined with the emission requirements of different places. The brief introduction of several typical process flows is as follows:

1.     Process Flow No. 1——Dual-alkali Desulphurization

2.     Process Flow No. 2——Dual-alkali Desulphurization

3.     Process Flow No. 3——Dual-alkali Desulphurization—Integrated Desulphurization, Dust Collection and Temperature Reduction

4.     Process Flow No.4——Ammonia-Fertilizer Method—Integrated Desulphurization and Denitration

Ⅲ. Application Type

High-pressure water mist desulphurization, denitration and dust collection technology is applicable for boilers of various types and places like industrial kilns.

1.     Applicable for middle-size and large boiler, especially for the middle-size and large coal-fired power plants, with high desulphurization and dust collection efficiency.

2.     The cyclone dust collector or two-stage electric dust collector can be selected for the dust reduction of middle-size and small coal-fired boiler, to save investment and operation cost.

3.     Capable of conducting integrated desulphurization, dust collection and temperature reduction for miniature coal-fired, oil-fired boiler and industrial kiln in the industries of iron and steel, smelting, papermaking, pharmaceuticals and cement to substitute electric dust collector and bag dust collector, with obvious advantages of energy and land conservation.

4.     The small coal-fired power plant can add high-pressure water mist fuel coal additive with independent intellectual property rights to the faulty coal and coal gangue to improve the heat efficiency and reduce the emission of sulphur dioxide. Its boiler slag can be used as building material to reduce the cost; the high-pressure water mist can conduct dust reduction and desulphurization with low cost, high efficiency and stable operation.     

5.     Capable of conducting integrated desulphurization and denitration for various coal-fired and oil-fired boilers and industrial kilns, reaching the increasingly high environmental protection requirement, with great perspectiveness.

6.     Applicable for dust collection and temperature reduction of cement, non-ferrous smelting, large-scale homogenizing stock yard as well as various material crushing and conveyance places.

7.     Applicable for coal saving and combustion supporting for coal-fired boiler, to improve the heat efficiency and reduce the boiler slag and the emission of sulphur dioxide.

8.     Applicable for the emission places for malodorous gas with toxin and hazard such as chemical plant, plastics plant, feedstuff factory, non-ferrous smelting and waste incineration, especially advantageous for malodor removal in the old plant modification and new plant with limited land.

Ⅳ. Market Prospects

The combined application of high-pressure water mist coal saving and combustion supporting technology and high efficient desulphurization, denitration and dust collection technology can realize the double standard of high burning efficiency of coal-fired boiler and clean emission, actually realize its energy conservation and emission reduction. If the high-pressure water mist large area dust reduction technology is applied in the burning site synchronously, the problems of dirty, disorderly and bad burning site of the coal-fired boiler will be solved fundamentally. The energy conservation and emission reduction, environmental-friendly operation, clean water and blue sky as well as the clean and high efficient production will be practically realized. Then a revolutionary of the coal-fired boiler for energy conservation and emission reduction as well as clean and high efficient production will be realized in the production field.

The high-pressure water mist technology for desulphurization, denitration and dust collection, coal saving and combustion supporting, and malodorous gas handling totally has independent intellectual property rights. So its promotion and application will necessarily and greatly improve the resource conservation and environmental protection capabilities of China, makes great contribution to saving land and building an Innovation-oriented country and will lead to enormous economic and social benefits.