WO2021082755A1 - 一种干熄焦用除尘装置及提高干熄焦锅炉蒸汽产率的方法 - Google Patents

一种干熄焦用除尘装置及提高干熄焦锅炉蒸汽产率的方法 Download PDF

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WO2021082755A1
WO2021082755A1 PCT/CN2020/114460 CN2020114460W WO2021082755A1 WO 2021082755 A1 WO2021082755 A1 WO 2021082755A1 CN 2020114460 W CN2020114460 W CN 2020114460W WO 2021082755 A1 WO2021082755 A1 WO 2021082755A1
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coke powder
coke
dry quenching
burner
dust
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PCT/CN2020/114460
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English (en)
French (fr)
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杨忠义
郑亚杰
陈柳池
王琳琳
杨俊峰
袁朝辉
刘玉虎
张雄飞
王磊
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中冶焦耐(大连)工程技术有限公司
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Priority to JP2022525770A priority Critical patent/JP7400097B2/ja
Priority to BR112022000997A priority patent/BR112022000997A2/pt
Publication of WO2021082755A1 publication Critical patent/WO2021082755A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B39/00—Cooling or quenching coke
    • C10B39/02—Dry cooling outside the oven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/02—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising gravity
    • 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
    • F27D17/004—Systems for reclaiming waste heat
    • F27D2017/006—Systems for reclaiming waste heat using a boiler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2001/00—Composition, conformation or state of the charge
    • F27M2001/04—Carbon-containing material
    • F27M2001/045—Coke
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention relates to the technical field of dry quenching, in particular to a dust removal device for dry quenching and a method for improving the steam yield of a dry quenching boiler.
  • red coke is loaded from the top of the CDQ furnace, and low-temperature inert gas is blown into the red coke layer in the cooling section of the CDQ by a circulating fan to absorb the sensible heat of the red coke, and the cooled coke is removed from the CDQ furnace.
  • the high-temperature inert gas from the annular flue of the CDQ flows through the CDQ boiler for heat exchange.
  • the CDQ boiler generates steam, and the cooled inert gas is blown into the CDQ again by the circulating fan.
  • the inert gas Recycle in a closed system.
  • the high-temperature circulating gas passes through the primary dust collector to separate the coarse particles of coke powder and then enters the CDQ boiler for heat exchange.
  • the low-temperature circulating gas whose temperature drops to about 160°C comes out of the CDQ boiler and is further separated by the secondary dust collector.
  • the circulating fan is sent to the feedwater preheater to cool to about 130°C, and then enter the dry quenching furnace for recycling.
  • the primary dust collector is used to separate the large particles of coke powder in the circulating gas and reduce the erosion and abrasion of the boiler pipe by the circulating gas.
  • the coke powder separated by the primary dust collector is mainly used for sintering, remixing coking and coking dust removal ash-based activated carbon, etc.
  • this process has achieved Its economic benefits are limited, and it is easy to cause environmental pollution.
  • the invention provides a dust removal device for dry quenching coke and a method for increasing the steam yield of a dry quenching boiler.
  • a burner arranged below the dust remover is used to fully burn the coke powder settled from the dust remover, and a large amount of hot flue gas will be generated Introduce the circulating gas to make the CDQ boiler produce more steam, thereby obtaining greater economic benefits.
  • a dust removal device for dry quenching comprising a dust remover, a coke powder bin, a burner, and an ash discharge valve that are sequentially connected from top to bottom; one side of the top of the dust remover is provided with a circulating gas inlet, and the other side of the top is provided with a circulating gas outlet ,
  • the circulating gas inlet is connected with the circulating gas outlet of the dry quenching furnace, and the circulating gas outlet is connected with the circulating gas inlet of the CDQ boiler;
  • the coke powder outlet at the bottom of the dust collector is connected with the coke powder inlet on the top of the coke powder bin;
  • the coke powder outlet at the bottom is connected to the coke powder inlet on the top of the burner.
  • One side of the burner is equipped with a combustion air inlet and a burner nozzle.
  • the other side of the burner is equipped with a hot flue gas outlet.
  • the hot flue gas outlet is connected by a hot flue gas pipe.
  • Dust collector; ash discharge valve is installed at the ash discharge port at the bottom of the burner.
  • the dust collector is a gravity sedimentation type dust collector.
  • the coke powder outlet of the dust collector and the coke powder inlet of the coke powder bin are connected by a flange.
  • the coke powder outlet of the coke powder bin and the coke powder inlet of the combustor are connected by a second flange.
  • the ash discharge port of the burner and the ash discharge valve are connected by three flanges.
  • An insulation layer is provided on the outer side of the hot flue gas pipe.
  • a method for improving the steam yield of a CDQ boiler The circulating gas flows from the CDQ side to the CDQ boiler side through the dust collector.
  • the dust collector most of the coke powder in the circulating gas settles due to gravity;
  • the settled coke powder falls into the coke powder bin below;
  • the coke powder collected by the coke powder bin enters the burner and is fully burned in the burner, and the hot flue gas generated by combustion is introduced into the dust collector through the coke powder bin, or through combustion
  • the hot flue gas pipeline outside the burner is introduced into the dust collector;
  • the hot flue gas brings a large amount of heat into the circulating gas, so that the subsequent CDQ boiler produces more steam;
  • the ash discharge valve under the burner is used to control the ash content
  • the discharge speed of the ash is used to produce a sealing effect to prevent the inhalation of air.
  • Fig. 1 is a schematic diagram of the structure of a dust removal device for dry quenching of the present invention.
  • the dust removal device for dry quenching of the present invention includes a dust collector 1, a coke powder bin 2, a burner 3, and an ash discharge valve 4 connected from top to bottom; the top of the dust collector 1 A circulating gas inlet is provided on one side, and a circulating gas outlet is provided on the other side of the top.
  • the circulating gas inlet is connected with the circulating gas outlet of the CDQ furnace, and the circulating gas outlet is connected with the circulating gas inlet of the CDQ boiler; the dust collector 1
  • the coke powder outlet at the bottom of the coke powder bin is connected to the coke powder inlet on the top of the coke powder bin 2; the coke powder outlet at the bottom of the coke powder bin 2 is connected to the coke powder inlet on the top of the burner 3.
  • a combustion air inlet and a burner nozzle are provided on one side of the burner 3.
  • the other side of the burner 3 is provided with a hot flue gas outlet, which is connected to the dust collector 1 through a hot flue gas pipe; an ash discharge valve 4 is arranged at the ash discharge port at the bottom of the burner 3.
  • the dust collector 1 is a gravity sedimentation type dust collector.
  • the coke powder outlet of the dust collector 1 and the coke powder inlet of the coke powder bin 2 are connected by a flange.
  • the coke powder outlet of the coke powder bin 2 and the coke powder inlet of the burner 3 are connected by a second flange.
  • the ash discharge port of the burner 3 and the ash discharge valve 4 are connected by a third flange.
  • An insulation layer is provided on the outer side of the hot flue gas pipe.
  • the circulating gas flows from the CDQ side to the CDQ boiler side through the dust collector 1.
  • the dust collector 1 most of the coke powder in the circulating gas It settles down due to gravity; the settled coke powder falls into the coke powder bin 2 below.
  • the coke powder collected by the coke powder bin 2 enters the burner 3, and an appropriate amount of combustion-supporting air is injected into the burner 3.
  • the nozzle of the burner 3 After the nozzle of the burner 3 is ignited, the coke powder is fully burned, and the hot smoke produced by the combustion is introduced through the coke powder bin 2 Into the dust collector 1, or introduced into the dust collector 1 through the hot flue gas pipe outside the burner 3, the pressure balance is more optimized through the hot flue gas pipe; the hot flue gas brings a large amount of heat into the circulating gas, thereby Make the subsequent CDQ boiler produce more steam.
  • the ash discharge valve 4 below the burner 3 is used to control the discharge speed of ash, and use the ash to produce a sealing effect to prevent air intake.

Abstract

本发明涉及一种干熄焦用除尘装置及提高干熄焦锅炉蒸汽产率的方法，循环气体通过除尘器由干熄炉侧向干熄焦锅炉侧流动，在除尘器中，循环气体中的大部分焦粉由于重力作用沉降下来；沉降下来的焦粉落入到下方的焦粉仓中；经过焦粉仓收集后的焦粉进入到燃烧器中并在燃烧器中充分燃烧，燃烧产生的热烟气经过焦粉仓导入到除尘器中，或者通过燃烧器外部的热烟气管道导入到除尘器中；热烟气向循环气体中带入大量的热量，使后续的干熄焦锅炉产生更多的蒸汽，从而获得更大的经济效益。

Description

一种干熄焦用除尘装置及提高干熄焦锅炉蒸汽产率的方法
本申请要求于2019年11月01日提交中国专利局、申请号为201911059317.1、发明名称为“一种干熄焦用除尘装置及提高干熄焦锅炉蒸汽产率的方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及干熄焦技术领域，尤其涉及一种干熄焦用除尘装置及提高干熄焦锅炉蒸汽产率的方法。
背景技术
在干熄焦工艺过程中，红焦从干熄炉顶部装入，低温惰性气体由循环风机鼓入干熄炉冷却段红焦层内，吸收红焦显热，冷却后的焦炭从干熄炉底部排出，从干熄炉环形烟道出来的高温惰性气体流经干熄焦锅炉进行热交换，由干熄焦锅炉产生蒸汽，冷却后的惰性气体由循环风机重新鼓入干熄炉，惰性气体在封闭的系统内循环使用。通常情况下，高温循环气体经过一次除尘器分离粗颗粒焦粉后进入干熄焦锅炉进行热交换，温度降至约160℃的低温循环气体由干熄焦锅炉出来，经过二次除尘器进一步分离细颗粒焦粉后，由循环风机送入给水预热器冷却至约130℃，再进入干熄炉循环使用。
一次除尘器用于将循环气体中的大颗粒焦粉分离出来，减少循环气体 对锅炉管道的冲刷磨损。目前，一次除尘器分离出来的焦粉主要用于烧结、回配炼焦以及制焦化除尘灰基活性炭等，但由于分离出的焦粉品质低、能耗高或技术水平的限制，这种工艺取得的经济效益有限，且易造成环境污染。
发明内容
本发明提供了一种干熄焦用除尘装置及提高干熄焦锅炉蒸汽产率的方法，利用设于除尘器下方的燃烧器充分燃烧从除尘器沉降的焦粉，将产生的大量热烟气导入循环气体中，使干熄焦锅炉产生更多的蒸汽，从而获得更大的经济效益。
为了达到上述目的，本发明采用以下技术方案实现：
一种干熄焦用除尘装置，包括自上至下依次连接的除尘器、焦粉仓、燃烧器及排灰阀；所述除尘器的顶部一侧设循环气体入口，顶部另一侧设循环气体出口，循环气体入口与干熄炉的循环气体出口相连接，循环气体出口与干熄焦锅炉的循环气体入口相连接；所述除尘器的底部设焦粉出口与焦粉仓顶部的焦粉入口相连；焦粉仓底部的焦粉出口连接燃烧器顶部的焦粉入口，燃烧器的一侧设助燃空气入口及燃烧器喷嘴，燃烧器的另一侧设热烟气出口，热烟气出口通过热烟气管道连接除尘器；燃烧器底部的排灰口处设排灰阀。
所述除尘器为重力沉降式除尘器。
所述除尘器的焦粉出口与焦粉仓的焦粉入口之间通过法兰一连接。
所述焦粉仓的焦粉出口与燃烧器的焦粉入口之间通过法兰二连接。
所述燃烧器的排灰口与排灰阀之间通过法兰三连接。
所述热烟气管道的外侧设保温层。
一种提高干熄焦锅炉蒸汽产率的方法，循环气体通过除尘器由干熄炉侧向干熄焦锅炉侧流动，在除尘器中，循环气体中的大部分焦粉由于重力作用沉降下来；沉降下来的焦粉落入到下方的焦粉仓中；经过焦粉仓收集后的焦粉进入到燃烧器中并在燃烧器中充分燃烧，燃烧产生的热烟气经过焦粉仓导入到除尘器中，或者通过燃烧器外部的热烟气管道导入到除尘器中；热烟气向循环气体中带入大量的热量，使后续的干熄焦锅炉产生更多的蒸汽；燃烧器下方的排灰阀用于控制灰分的排出速度，利用灰分产生密封作用，防止吸入空气。
与现有技术相比，本发明的有益效果是：
1)可以直接将从除尘器沉降分离出的焦粉进行充分燃烧，产生的大量热烟气导入循环气体中，使干熄焦锅炉产生更多的蒸汽，工艺路径短，热量回收效率高，从而获得更大的经济效益；
2)降低了焦粉后续处理的负荷，减少了焦粉的逸散，经济环保。
附图说明
图1是本发明所述一种干熄焦用除尘装置的结构示意图。
图中：1.除尘器 2.焦粉仓 3.燃烧器 4.排灰阀
具体实施方式
下面结合附图对本发明的具体实施方式作进一步说明：
如图1所示，本发明所述一种干熄焦用除尘装置，包括自上至下依次连接的除尘器1、焦粉仓2、燃烧器3及排灰阀4；所述除尘器1的顶部一侧设循环气体入口，顶部另一侧设循环气体出口，循环气体入口与干熄炉的循环气体出口相连接，循环气体出口与干熄焦锅炉的循环气体入口相连接；所述除尘器1的底部设焦粉出口与焦粉仓2顶部的焦粉入口相连；焦粉仓2底部的焦粉出口连接燃烧器3顶部的焦粉入口，燃烧器3的一侧设助燃空气入口及燃烧器喷嘴，燃烧器的另一侧设热烟气出口，热烟气出口通过热烟气管道连接除尘器1；燃烧器3底部的排灰口处设排灰阀4。
所述除尘器1为重力沉降式除尘器。
所述除尘器1的焦粉出口与焦粉仓2的焦粉入口之间通过法兰一连接。
所述焦粉仓2的焦粉出口与燃烧器3的焦粉入口之间通过法兰二连接。
所述燃烧器3的排灰口与排灰阀4之间通过法兰三连接。
所述热烟气管道的外侧设保温层。
本发明所述一种提高干熄焦锅炉蒸汽产率的方法，循环气体通过除尘器1由干熄炉侧向干熄焦锅炉侧流动，在除尘器1中，循环气体中的大部分焦粉由于重力作用沉降下来；沉降下来的焦粉落入到下方的焦粉仓2中。经过焦粉仓2收集后的焦粉进入到燃烧器3中，向燃烧器3中喷入适量的助燃空气，燃烧器3的喷嘴点火后使焦粉充分燃烧，燃烧产生的热烟气经过焦粉仓2导入到除尘器1中，或者通过燃烧器3外部的热烟气管道导入到除尘器1中，通过热烟气管道导入压力平衡更为优化；热烟气向循环气体中带入大量的热量，从而使后续的干熄焦锅炉产生更多的蒸汽。燃烧器3下方的排灰阀4用于控制灰分的排出速度，利用灰分产生密封作用，防 止吸入空气。
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。

Claims (8)

  1. 一种干熄焦用除尘装置，其特征在于，包括自上至下依次连接的除尘器、焦粉仓、燃烧器及排灰阀；所述除尘器的顶部一侧设循环气体入口，顶部另一侧设循环气体出口，循环气体入口与干熄炉的循环气体出口相连接，循环气体出口与干熄焦锅炉的循环气体入口相连接；所述除尘器的底部设焦粉出口与焦粉仓顶部的焦粉入口相连；焦粉仓底部的焦粉出口连接燃烧器顶部的焦粉入口，燃烧器的一侧设助燃空气入口及燃烧器喷嘴；燃烧器底部的排灰口处设排灰阀。
  2. 根据权利要求1所述的一种干熄焦用除尘装置，其特征在于，所述除尘器为重力沉降式除尘器。
  3. 根据权利要求1所述的一种干熄焦用除尘装置，其特征在于，所述除尘器的焦粉出口与焦粉仓的焦粉入口之间通过法兰一连接。
  4. 根据权利要求1所述的一种干熄焦用除尘装置，其特征在于，所述焦粉仓的焦粉出口与燃烧器的焦粉入口之间通过法兰二连接。
  5. 根据权利要求1所述的一种干熄焦用除尘装置，其特征在于，所述燃烧器的排灰口与排灰阀之间通过法兰三连接。
  6. 根据权利要求1所述的一种干熄焦用除尘装置，其特征在于，所述热烟气管道的外侧设保温层。
  7. 根据权利要求1-6任一项所述的一种干熄焦用除尘装置，其特征在于，燃烧器的另一侧设热烟气出口，热烟气出口通过热烟气管道连接除尘器。
  8. 一种基于权利要求1-7任一项所述干熄焦用除尘装置的提高干熄焦锅炉蒸汽产率的方法，其特征在于，循环气体通过除尘器由干熄炉侧向干熄焦锅炉侧流动，在除尘器中，循环气体中的大部分焦粉由于重力作用沉降下来；沉降下来的焦粉落入到下方的焦粉仓中；经过焦粉仓收集后的焦粉进入到燃烧器中并在燃烧器中充分燃烧，燃烧产生的热烟气经过焦粉仓导入到除尘器中，或者通过燃烧器外部的热烟气管道导入到除尘器中；热烟气向循环气体中带入大量的热量，使后续的干熄焦锅炉产生更多的蒸汽；燃烧器下方的排灰阀用于控制灰分的排出速度，利用灰分产生密封作用，防止吸入空气。
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