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Production method for co-production of sulfuric acid and cement from gypsum
The invention discloses a production method for co-production of sulfuric acid and cement from gypsum, and relates to the technical field of cement production, and the method comprises the following steps: S1, drying and dehydrating raw materials and auxiliary materials: dehydrating the raw material dihydrate gypsum and the auxiliary materials sandstone, clay and the like through a drying device, and converting the dihydrate gypsum into semi-hydrated gypsum; s2, the raw materials and the auxiliary materials are mixed in proportion and ground into raw materials; s3, feeding the raw material into a primary reduction decomposition kiln; s4a, putting the raw material into an oxidation firing kiln; s5a, cooling to obtain cement clinker; s6a, cement clinker grinding and delivery; s4b, the sulfur-containing flue gas output in the step S3 is subjected to dust removal; s5b, purifying and drying; s6b, catalytic oxidation: the sulfur-containing flue gas enters a two-conversion and two-absorption system after being purified and dried, SO2 in the sulfur-containing flue gas is converted into SO3 under the action of a catalyst, and sulfuric acid is obtained after the SO3 is absorbed; neutralizing the rest sulfur-containing gas with ammonia; and S7b, the tail gas is discharged after reaching the standard. The flue gas emission is greatly reduced, and meanwhile the production capacity of the device is improved.
本发明公开了一种石膏制硫酸联产水泥生产方法，涉及水泥生产技术领域，包括以下步骤：S1、原料、辅料烘干脱水：原料二水石膏、辅料砂岩、粘土等通过烘干装置脱水，其中二水石膏转化为半水石膏；S2、原料、辅料按比例混合研磨成生料；S3、生料入一级还原分解窑；S4a、生料入氧化烧成窑；S5a、冷却得水泥熟料；S6a、水泥熟料粉磨、出厂；S4b、S3工序输出的含硫烟气除尘；S5b、净化、干燥；S6b、催化氧化：含硫烟气净化干燥后进入两转两吸系统，其中的SO2在催化剂的作用下转化成SO3，SO3经吸收后得硫酸；其余含硫气体氨中和；S7b、尾气达标排放。本发明大幅度降低烟气排放量，同时提高装置的生产能力。
Production method for co-production of sulfuric acid and cement from gypsum
The invention discloses a production method for co-production of sulfuric acid and cement from gypsum, and relates to the technical field of cement production, and the method comprises the following steps: S1, drying and dehydrating raw materials and auxiliary materials: dehydrating the raw material dihydrate gypsum and the auxiliary materials sandstone, clay and the like through a drying device, and converting the dihydrate gypsum into semi-hydrated gypsum; s2, the raw materials and the auxiliary materials are mixed in proportion and ground into raw materials; s3, feeding the raw material into a primary reduction decomposition kiln; s4a, putting the raw material into an oxidation firing kiln; s5a, cooling to obtain cement clinker; s6a, cement clinker grinding and delivery; s4b, the sulfur-containing flue gas output in the step S3 is subjected to dust removal; s5b, purifying and drying; s6b, catalytic oxidation: the sulfur-containing flue gas enters a two-conversion and two-absorption system after being purified and dried, SO2 in the sulfur-containing flue gas is converted into SO3 under the action of a catalyst, and sulfuric acid is obtained after the SO3 is absorbed; neutralizing the rest sulfur-containing gas with ammonia; and S7b, the tail gas is discharged after reaching the standard. The flue gas emission is greatly reduced, and meanwhile the production capacity of the device is improved.
本发明公开了一种石膏制硫酸联产水泥生产方法，涉及水泥生产技术领域，包括以下步骤：S1、原料、辅料烘干脱水：原料二水石膏、辅料砂岩、粘土等通过烘干装置脱水，其中二水石膏转化为半水石膏；S2、原料、辅料按比例混合研磨成生料；S3、生料入一级还原分解窑；S4a、生料入氧化烧成窑；S5a、冷却得水泥熟料；S6a、水泥熟料粉磨、出厂；S4b、S3工序输出的含硫烟气除尘；S5b、净化、干燥；S6b、催化氧化：含硫烟气净化干燥后进入两转两吸系统，其中的SO2在催化剂的作用下转化成SO3，SO3经吸收后得硫酸；其余含硫气体氨中和；S7b、尾气达标排放。本发明大幅度降低烟气排放量，同时提高装置的生产能力。
Production method for co-production of sulfuric acid and cement from gypsum
一种石膏制硫酸联产水泥生产方法
ZHU JIAN (author) / XIA CHENGHUA (author) / LI CHUNPING (author) / WANG SHUJUN (author) / WANG QIAN (author) / WANG YONGQUAN (author) / ZHAO WENBO (author)
2023-06-23
Patent
Electronic Resource
Chinese
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