Product introduction: desulfurization, denitration and dust removal technology is a selective non catalytic reduction denitration technology. This technology uses NH3, urea and other reducing agents to be injected into the furnace at a temperature of 850 ~ 1100 ℃. The reducing agent (urea) is rapidly thermally decomposed into NH3 and selectively reacts with NOx in the flue gas. NOx is reduced to nitrogen and water. This method takes the furnace as the reactor, with simple process and convenient operation.