Coal-fired power plant flue gas sulfur dioxide catalytic desulfurization production and technical flow

Abstract

The invention discloses a coal-fired power plant flue gas sulfur dioxide catalytic desulfurization production and technical flow and application of catalyst for coal-fired power plant flue gas sulfur dioxide catalytic desulfurization. The invention has high desulfurization rate, is stable and is easy to grasp, can recycle and use the sulfur dioxide and turn the harm into benefit to create huge economic benefits for coal power enterprises. The catalytic desulfurization production and technical flow are applications of the catalyst in practice. A catalytic desulfurization device comprises a supply system for producing catalyst and a catalyst distributing tank, a raw gas processing system consisting of a secondary dedusting and pressurizing fan and a heat exchanger, and dual-body catalytic towers arranged in a core device and mutually switched through an appliance and control system and a transfer switch, and the uniformity of a catalytic system and a cycling system is formed by shifting operation; and after desulfurization, a sulfur dioxide saturated sulphate liquid becomes an industrial material, thus achieving the purpose of changing wastes into values. The technology is applicable for the environmental protection of various coal-fired enterprises.

Description

Technical field: [0001] The present invention mainly relates to the fields of environmental protection, energy saving, emission reduction, transformation of economic growth mode, etc. The present invention has three parts: 1. SO 2 , the invention of the catalyst, and the production and supply system of the catalyst; 2. The flue gas sulfur dioxide in coal-fired power plants, the catalytic desulfurization production and process system; 3. The sulfate solution recovered after desulfurization, the purification and product production system. (This system is provided by Jiangsu Complete Chemical Equipment Co., Ltd.). Background technique: [0002] Sulfur dioxide SO 2 It is the first of the top ten pollution hazards in the world. Almost all industrial coal, gas and fuel oil produce sulfur dioxide SO 2 , but the largest emitters are coal-fired power plants. my country's air pollution is soot-type pollution. The research report of the Chinese Academy of Engineering shows that 85% o...

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Problems solved by technology

Such a huge expenditure cannot generate economic benefits for enterprises according to the current domestic policy, and it is not completely suitable for the national conditions, and it is not acceptable to the majority of coal-fired users in our country

[0015] (2) The FGD system equipment is huge and difficult to manage

[0017] Such a large and complex desulfurization system project, and there are a series of difficult difficulties and problems in the operation process, which seriously hinder the development of the desulfurization industry of coal-fired power plants in various countries in the world

[0018] (3) There are many obstacles in digestion and absorption of imported technology

[0020] (2) SO at low pH value operation 2 The emission exceeds the standard significantly, and on the other hand, the corrosion of equipment is intensified; SO 2 Emissions are significantly reduced, but solid particles accumulate and scale inside the desulfurization equipment, making the equipment blocked and unable to operate safely; when operating at a neutral pH value, the desulfurization rate is high, but the cost is the largest

It is difficult to improve;

[0024] ③Desulfurization enterprises are currently forced to operate with difficulty under the condition of meager profit

[0025] (4) Scaling problem is serious

[0029] (5) The by-products are difficult to deal with, and the area is large, causing secondary pollution

[0039] Compared with natural gypsum, desulfurized gypsum has no advantages at all. If it is left to be stacked and developed, it will waste resources, occupy land, and cause secondary pollution

[0040] (6) Low desulfurization rate

[0042] FGD limestone / gypsum wet desulfurization is difficult to be accepted by the majority of desulfurization enterprises. The reason is that the limestone / gypsum wet desulfurization rate is low, the operating cost is high, and the operation of enterprises is difficult, which is still an important reason for desulfurization enterprises.

[0043] A series of difficulties and problems above have seriously restricted the development of the desulfurization industry of my country's coal-fired enterprises. At present, insufficient power supply is still one of the main reasons restricting the development of national production.

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