Vertical recycling, drying and calcining furnace for SCR (selective catalytic reduction) denitration catalysts

Abstract

The invention discloses a vertical recycling, drying and calcining furnace for SCR (selective catalytic reduction) denitration catalysts. The vertical recycling, drying and calcining furnace comprises a furnace body, a material transport return system, a fire-resistant heat-insulation system, a drying zone, a calcining zone, a cooling zone, a first electric heating system, a second electric heating system, a first internal hot-air circulation unit, a second internal hot-air circulation unit, a third internal hot-air circulation unit, a moisture removing system, a waste gas exhaust system, a cooling and aerating air system, a waste heat recycling system and a control system. The material transport return system is matched with the furnace body, the fire-resistant heat-insulation system is arranged in the furnace body, the drying zone, the calcining zone and the cooling zone are sequentially arranged in the furnace body, the first electric heating system is arranged in the drying zone, the second electric heating system is arranged in the calcining zone, the first internal hot-air circulation unit is arranged in the drying zone, the second internal hot-air circulation unit is arranged in the calcining zone, the third internal hot-air circulation unit is arranged in the cooling zone, the moisture removing system is matched with the drying zone, the waste gas exhaust system is matched with the calcining zone, the cooling and aerating air system is matched with the cooling zone, the waste heat recycling system is connected between the cooling zone and the calcining zone, and the calcining furnace can work under the control of the control system. The vertical recycling, drying and calcining furnace has the advantages that calcining conditions such as heating rates, product calcining cycles, waste gas contents and product temperature field uniformity can be accurately controlled and guaranteed, and accordingly quality index requirements on products can be assuredly met.

Description

technical field [0001] The invention relates to the technical field of calcination furnaces, and more specifically relates to a vertical regenerative drying calcination furnace for SCR denitration catalysts. Background technique [0002] Nitrogen oxides (NOx) are one of the main components of air pollutants, SO 2 and smoke and dust removal technology has been relatively mature, and has a large-scale application, SO 2 And smoke and dust have been effectively controlled. The attention to NOx is relatively late, and the massive emission of NOx at this stage directly leads to environmental pollution. In my country, 70% of nitrogen oxide emissions come from coal combustion, and power plants are large coal consumers. How to effectively control NOx emissions has become the focus of attention in my country and even the world. At present, in the technical field of NOx treatment, Selective Catalytic Reduction (SCR) has been widely used due to its high reliability, no by-products, a...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a vertical regenerative drying and calcining furnace for SCR denitrification catalyst that can solve the drying and calcination problems in the regeneration process of SCR denitrification catalyst

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