CN108870987A - 一种冶金行业球团生产线脱硫脱销治理岛的改造方法 - Google Patents
一种冶金行业球团生产线脱硫脱销治理岛的改造方法 Download PDFInfo
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- CN108870987A CN108870987A CN201810269515.XA CN201810269515A CN108870987A CN 108870987 A CN108870987 A CN 108870987A CN 201810269515 A CN201810269515 A CN 201810269515A CN 108870987 A CN108870987 A CN 108870987A
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- 230000003009 desulfurizing Effects 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000005453 pelletization Methods 0.000 title claims abstract description 15
- 238000005272 metallurgy Methods 0.000 title claims abstract description 12
- 238000007634 remodeling Methods 0.000 title claims abstract description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound 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[O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000003546 flue gases Substances 0.000 claims abstract description 25
- 238000006477 desulfuration reactions Methods 0.000 claims abstract description 22
- 238000001035 drying Methods 0.000 claims abstract description 14
- 239000000428 dust Substances 0.000 claims abstract description 6
- 238000000034 methods Methods 0.000 claims description 10
- 280000598855 With Investment companies 0.000 abstract description 2
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- 239000003054 catalysts Substances 0.000 description 3
- 239000004152 Nitrogen oxides Substances 0.000 description 2
- 238000005516 engineering processes Methods 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitric oxide Chemical class 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O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 229910052813 nitrogen oxides Inorganic materials 0.000 description 2
- 239000002994 raw materials Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000007789 gases Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000000452 restraining Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste materials Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
Abstract
一种冶金行业球团生产线脱硫脱销治理岛的改造方法，属于冶金行业球团生产技术领域。工艺步骤：在烟气高温段布置第一脱销装置，实现先脱销后脱硫；在多管除尘器和1#耐热风机之间设置第一脱销装置，实现烟气高温段脱销；在环冷机和链篦机之间的2#耐热风机前设置第一脱销装置，实现烟气高温段脱销；脱销后的烟气在链篦机干燥段通过主引风机抽出后，进入电除尘器和脱硫装置除尘脱硫后，净化后的烟气通过烟囱排入大气。优点在于，在满足国家大气污染物排放标准的情况下，即可降低脱销系统的配置能力，又可以节约投资和运行费用。
Description
一种冶金行业球团生产线脱硫脱销治理岛的改造方法
技术领域
[0001] 本发明属于冶金行业球团生产技术领域，特别涉及一种冶金行业球团生产线脱硫 脱销治理岛的改造方法。适用于钢铁行业球团工序脱硫脱销系统分区域、分温度综合治理 烟气的情况。
背景技术
[0002] 随着国家节能减排政策的逐步推进，冶金行业脱硫脱销烟气治理技术得到广泛的 推广和应用，主要技术均是从电力行业移植或借鉴国外技术装备。脱硫装置和脱销系统的 布置关系均为脱硫后布置脱销装置，流程图见附图1:冶金行业脱硫脱销治理岛常规流程 图。此种方式球团生产线烟气先进入电除尘器6除尘后，进入脱硫装置7脱出烟气中的S，再 进入第二脱销装置11，通过主引风机8排到烟囱9后进入大气环境，其中脱销装置可以布置 在主引风机8前或后。脱硫后烟气温度低、流量大，后续脱销治理难度提高很多，需要考虑采 用调温调质措施，造成脱销运行费用大幅增加和初投资的增加。
发明内容
[0003] 本发明的目的在于提供一种冶金行业球团生产线脱硫脱销治理岛的改造方法，减 弱了球团烟气脱销系统受温度影响的程度，降低脱销系统投资和运行费用。
[0004] 本改造方法结合球团生产的工艺流程和烟气循环过程，将脱销系统布置在脱硫装 置前，在高温区域实现先脱销后脱硫，分区域、分温度综合治理球团烟气。在满足国家大气 污染物排放标准的情况下，即可降低脱销系统的配置能力，又可以节约投资和运行费用。
[0005] 本发明的脱硫系统和脱销系统分别布置在球团生产线的烟气低温和高温区域，实 现分区域、分温度综合治理烟气;具体工艺步骤及控制的技术参数如下：
[0006] 1、在烟气高温段布置第一脱销装置3,实现先脱销后脱硫；
[0007] 2、在多管除尘器2和1#耐热风机4之间设置第一脱销装置3,实现烟气高温段脱销；
[0008] 3、在环冷机和链篦机之间的2#耐热风机12前设置第一脱销装置3,实现烟气高温 段脱销；
[0009] 4、脱销后的烟气在链篦机干燥段通过主引风机8抽出后，进入电除尘器6和脱硫装 置7除尘脱硫后，净化后的烟气通过烟囱9排入大气。
[0010]本发明的优点在于:根据球团生产的烟气循环特性、温度特性将脱硫系统和脱销 系统分开设置，在烟气高温区域设置脱销装置，实现先脱销后脱硫，有效地降低了脱销系统 的治理难度，并排除了脱销系统催化剂受温度的制约因素，解决了球团生产脱硫脱销治理 岛占地大、投资和运行费用高等问题。
附图说明
[0011] 图1为冶金行业脱硫脱销治理岛常规流程图。
[0012] 图2为本发明的脱硫脱销治理岛流程图。
[0013]其中，耐热风管路1，多管除尘器2,第一脱销装置3，1#耐热风机4,主引风管路5,静 电除尘器6,脱硫装置7,主引风机8,烟肉9,环冷热风官路1〇,第一脱销装置11，2#耐热风机 12。
具体实施方式
[00M]治金行业球团生产线氮氧化物产生主要在回转窑中，为充分利用回转窑中烟气的 余热，将链篦机预热段的高温烟气通过1#耐热风机4引到链篦机干燥段，用于干燥原材料。 有的球团生产线还将环冷机的高温烟气引到链篦机干燥段，用于干燥原材料。冷却下来的 烟气温降较大，烟气温度较低，烟气循环量也较大，如采用常规处理方法先脱硫后脱销的 话，势必造成需要增设调温调质措施，造成能源的浪费，带来系统运行不稳定和催化剂成本 的大幅增加。本改造方法结合球团生产流程和烟气循环特性，在烟气高温区域先脱销，在低 温区域再脱硫，实现先脱销后脱硫。
[0015] 本发明首先需要确定耐热风机的烟气温度，计算耐热风的烟气量和氮氧化物含 量;其次选定合适的催化剂和脱销装置;最后根据选定的脱销装置进行系统的设计和匹配。 脱硫系统配置按照环保标准要求进行常规的选配。具体步骤如下：
[0016] 1、烟气高温区域设置脱销装置;在耐热风管路1上，多管除尘器2和W耐热风机4之 间设置第一脱销装置3;在环冷机和链篦机之间的2#耐热风机12前设第一置脱销装置3， [0017] 2、在主引风管路5，静电除尘器6和主引风机8之间设置脱硫装置7。
[0018]以上设施建设完成、单体试车和无符合试车没有问题后，可以进行运行调试，在满 足生产需要的条件下，通过自动控制技术实现脱硫脱销治理岛的运行，满足设计要求。具体 工艺步骤及控制的技术参数如下：
[0019] 1、在烟气高温段布置第一脱销装置3,实现先脱销后脱硫；
[0020] 2、在多管除尘器2和1#耐热风机4之间设置第一脱销装置3,实现烟气高温段脱销； [0021] 3、在环冷机和链篦机之间的2#耐热风机12前设置第一脱销装置3,实现烟气高温 段脱销；
[0022] 4、脱销后的烟气在链篦机千燥段通过主引风机8抽出后，进入电除尘器6和脱硫装 置7除尘脱硫后，净化后的烟气通过烟囱9排入大气。
Claims (1)
1. 一种冶金行业球团生产线脱硫脱销治理岛的改造方法，其特征在于，具体工艺步骤 及控制的技术参数如下： 1) 在烟气高温段布置第一脱销装置⑶，实现先脱销后脱硫； 2) 在多管除尘器(2)和1#耐热风机(4)之间设置第一脱销装置(3)，实现烟气高温段脱 销； 3) 在环冷机和链篦机之间的2#耐热风机（12)前设置第一脱销装置(3)，实现烟气高温 段脱销； 4) 脱销后的烟气在链篦机干燥段通过主引风机(8)抽出后，进入电除尘器(6)和脱硫装 置(7)除尘脱硫后，净化后的烟气通过烟囱®>排入大气。
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