WO2019105109A1 - 干法除尘无尘卸灰方法 - Google Patents

干法除尘无尘卸灰方法 Download PDF

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WO2019105109A1
WO2019105109A1 PCT/CN2018/106355 CN2018106355W WO2019105109A1 WO 2019105109 A1 WO2019105109 A1 WO 2019105109A1 CN 2018106355 W CN2018106355 W CN 2018106355W WO 2019105109 A1 WO2019105109 A1 WO 2019105109A1
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valve
metal hose
ash
accident
suction device
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PCT/CN2018/106355
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English (en)
French (fr)
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葛雷
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中冶南方工程技术有限公司
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Publication of WO2019105109A1 publication Critical patent/WO2019105109A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/38—Removal of waste gases or dust
    • C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
    • 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

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  • the invention relates to the field of environmental protection equipment, and more particularly to a method for dry dust removal and dust removal.
  • the existing main problems of the dry dust removal ash discharge system of the converter are as follows: First, the ash discharge port is far away from the ash truck, the drop is large, and it is easy to cause secondary dust; the second is that the high temperature coarse ash humidifies and generates a large amount of steam. Affect the working environment in the main building.
  • the technical problem to be solved by the present invention is to provide a method for dry dust removal and dust removal, which not only solves the problem of generating a large amount of steam after humidification of high temperature coarse ash, but also solves the problem of secondary dust caused by large drop of ash discharge. .
  • the technical solution adopted by the present invention to solve the technical problem thereof is: constructing a dry dust removal method for dust removal, comprising the following steps:
  • the ash discharge port of the coarse ash silo and the telescopic metal hose are connected by the unloading main pipe, and the unloading main pipe is provided with a manual plug-in valve and a pneumatic double-layer flap valve;
  • the top of the telescopic metal hose is provided with a pulse valve, and the telescopic metal hose is lifted and lowered by the hoist; the ground suction device is connected to the coarse ash bin through an accidental ash discharge pipe, and the accidental ash discharge There is an accident manual flapper valve and an accident pneumatic double-layer flap valve on the pipe;
  • the nitrogen tube is divided into two paths, one is connected to the pulse valve, the other is connected to the air supply pipe of the ground suction device; the first valve of the pulse valve is provided with a first pneumatic ball valve; There is a second pneumatic ball valve, and the ground suction device outlet is connected with a wear-resistant metal hose;
  • the top of the coarse ash silo is provided with a simple bag filter and a vacuum pressure release valve, and a nitrogen fluidization device is arranged in the lower cone of the coarse ash bin.
  • the manual flapper valve or the accident manual flapper valve is normally opened, and is closed during maintenance.
  • the nitrogen pressure delivered in the step S2 is ⁇ 0.6 MPa.
  • the invention eliminates the humidification and unloading ash, and no steam is generated when the ash is discharged, and the working environment in the main plant is greatly improved;
  • the gray ash silo unloading ash adopts the method of dust-free ash discharging and pneumatic conveying, and there is no dust overflow during ash discharging, which is more environmentally friendly.
  • the invention not only solves the problem of generating a large amount of steam after humidification of high-temperature coarse ash, but also solves the problem of secondary dust caused by large drop of ash discharge, and is especially suitable for a dry dust removal project of converter once, and has broad application prospects.
  • Figure 1 is a schematic illustration of a dry dust removal dust removal system of the present invention.
  • the dry dust removal and dust removal method of the present invention comprises the steps S1-S3, as follows:
  • S1 structure dry dust removal dust-free ash discharge system, as shown in Figure 1, which includes coarse ash silo 1, ash discharge main 5, telescopic metal hose 8, accidental ash discharge pipe 11, ground suction device 14 and resistant Grind the metal hose 15.
  • the ash discharge port of the coarse ash silo 1 and the telescopic metal hose 8 are connected by an unloading main pipe 5, and the unloading main pipe 5 is provided with a manual flapper valve 6 and a pneumatic double flap flapper 7.
  • the top of the coarse ash silo 1 is provided with a simple bag filter 2 and a vacuum pressure release valve 3.
  • the simple bag filter 2 is used to collect the dust discharged from the top of the coarse ash bin 1.
  • the vacuum pressure relief valve 3 serves to prevent the internal pressure of the coarse ash silo 1 from being excessively large.
  • a nitrogen fluidizing device 4 is provided in the lower cone of the coarse ash silo to reduce the coarse ash temperature, dilute the gas mixed in the coarse ash, and prevent coarse ash agglomeration.
  • a pulse valve 10 is provided on the top of the telescopic metal hose 8, and the pulse valve 10 is used to remove the coarse ash remaining in the telescopic metal hose 8.
  • the telescopic metal hose 8 is lifted and lowered by the hoisting machine 9 to reach the ash port of the ash truck 21.
  • the ground suction device 14 is connected to the coarse ash silo 1 through the accidental ash discharge pipe 11, and the accidental ash discharge pipe 11 is provided with an accident manual flapper valve 12 and an accident pneumatic double-layer flapper valve 13.
  • the accident manual flapper valve 12 and the accident pneumatic double-layer flapper valve 13 are opened, the coarse ash in the coarse ash silo 1 enters the ground suction device 14 through the accidental ash discharge pipe 11.
  • the second pneumatic ball valve 18 and the makeup valve 19 are opened, and the coarse ash in the ground suction device 14 is sent to the suction and exhaust vehicle 22 through the wear-resistant metal hose 15.
  • the nitrogen tube 16 is divided into two paths, one connected to the pulse valve 10 and the other connected to the supplemental valve 19 of the ground suction device 14.
  • the first valve of the pulse valve 10 is provided with a first pneumatic ball valve 17, and when the first pneumatic ball valve 17 is opened, the pulse valve 10 is sprayed with dust.
  • the inlet of the air supply valve 19 of the ground suction device 14 is provided with a second pneumatic ball valve 18, and the outlet of the ground suction device 14 is connected to the wear-resistant metal hose 15.
  • the pneumatic double-layer flap valve 7 is closed, the first pneumatic ball valve 17 is opened, the pulse valve 10 is blown with nitrogen to remove the coarse ash remaining in the telescopic metal hose 8, and the telescopic metal hose 8 is raised to the height by the hoisting machine 9.
  • the manual flapper valve 6 or the accident manual flapper valve 12 is normally open and closed during maintenance.
  • the telescopic metal hose 8 or the ground suction device 14 of the present invention employs a method of intermittent ash conveying. Each time the coarse ash is delivered, it is a cycle process, and each cycle includes 2 steps of S2-S3.
  • the material of the coarse ash silo 1 is stainless steel.
  • the material of the telescopic metal hose 8 is stainless steel.
  • the wear-resistant metal hose 15 is made of stainless steel.
  • the hoisting machine is equipped with an electromechanical capacity: 1.0 to 10 kW.
  • the converter in the dry dust removal and dust removal method of the present invention is defined as: decarburization converter or dephosphorization converter or lava homogenization furnace or stainless steel converter or vanadium extraction converter.
  • the method in this embodiment is applicable to the ash discharge of the dry dust removal of the flue gas in a 50t to 400t converter.

Abstract

一种干法除尘无尘卸灰方法，包括步骤：S1、构造干法除尘无尘卸灰系统，其包括粗灰仓（1）、卸灰主管（5）、伸缩式金属软管（8）、事故卸灰管（11）、地面吸料装置（14）和耐磨金属软管（15）；S2、手动插板阀（6）和气动双层翻板阀（7）开启，伸缩式金属软（15）管通过卷扬机（9）将其降至低位，或事故手动插板阀（12）和事故气动双层翻板阀（13）开启，粗灰卸至运灰车或进入地面吸料装置（14）；S3、关闭气动双层翻板阀（7），打开第一气动球阀（17），脉冲阀（10）喷吹氮气清除伸缩式金属软管（8）内残留的粗灰，伸缩式金属软管（8）通过卷扬机将其升至高位，关闭第一气动球阀。该方法解决了高温粗灰加湿后产生大量蒸汽的问题，以及由于卸灰落差大引起的二次扬尘的问题。

Description

干法除尘无尘卸灰方法 技术领域
本发明涉及环保设备领域，更具体地说，涉及一种干法除尘无尘卸灰方法。
背景技术
随着新的环保标准不断提高，新建及改建的转炉大都采用干法除尘系统。蒸发冷却器收集的高温粗灰通过内置双链式输送机送至主厂房内的粗灰仓，加湿后由汽车外运。
现有的转炉干法除尘粗灰卸灰系统主要存在的问题：一是卸灰口离运灰车较远，落差大，容易引起二次扬尘；二是高温的粗灰加湿后产生大量蒸汽，影响主厂房内工作环境。
发明内容
本发明要解决的技术问题在于，提供一种干法除尘无尘卸灰方法，不但解决了高温粗灰加湿后产生大量蒸汽的问题，也解决了由于卸灰落差大引起的二次扬尘的问题。
本发明解决其技术问题所采用的技术方案是：构造一种干法除尘无尘卸灰方法，包括以下步骤：
S1、构造干法除尘无尘卸灰系统，其包括粗灰仓、卸灰主管、伸缩式金属软管、事故卸灰管、地面吸料装置和耐磨金属软管；
所述粗灰仓的卸灰口和所述伸缩式金属软管通过所述卸灰主管连接，所述卸灰主管上设有手动插板阀和气动双层翻板阀；
所述伸缩式金属软管顶部设有脉冲阀，所述伸缩式金属软管通过所述卷扬机升降；所述地面吸料装置通过事故卸灰管与所述粗灰仓连接，所述事故卸灰管上设有事故手动插板阀和事故气动双层翻板阀；
所述氮气管分为两路，一路与所述脉冲阀连接，另一路与所述地面吸料装置补气管连接；所述脉冲阀入口设有第一气动球阀；所述地面吸料装置入口设 有第二气动球阀，所述地面吸料装置出口连接耐磨金属软管；
S2、手动插板阀和气动双层翻板阀开启，伸缩式金属软管通过卷扬机将其降至低位，或事故手动插板阀和事故气动双层翻板阀开启，粗灰在重力作用下卸至运灰车或进入地面吸料装置。地面吸料装置接收粗灰后，关闭事故气动双层翻板阀，打开第二气动球阀，对地面吸料装置进行补气，混合均匀的气灰混合物通过耐磨金属软管送至吸排车，输送完并吹扫干净；
S3、关闭气动双层翻板阀，打开第一气动球阀，脉冲阀喷吹氮气清除伸缩式金属软管内残留的粗灰，伸缩式金属软管通过卷扬机将其升至高位，关闭第一气动球阀；或关闭第二气动球阀和事故气动双层翻板阀；伸缩式金属软管或地面吸料装置恢复输送状态。
上述方案中，所述粗灰仓顶部设有简易布袋除尘器和真空压力释放阀，所述粗灰仓下锥斗内设有氮气流化装置。
上述方案中，所述手动插板阀或事故手动插板阀常开，检修时关闭。
上述方案中，所述步骤S2中输送的氮气压力≥0.6MPa。
实施本发明的干法除尘无尘卸灰方法，具有以下有益效果：
1、本发明取消了加湿卸灰，卸灰时无蒸汽产生，主厂房内工作环境大大改善；
2、粗灰仓卸灰采用无尘卸灰及气力输送的方式，卸灰时无粉尘外溢，更环保。
3、本发明不但解决了高温粗灰加湿后产生大量蒸汽的问题，也解决了由于卸灰落差大引起的二次扬尘的问题，尤其适合转炉一次烟气干法除尘项目，应用前景广阔。
附图说明
下面将结合附图及实施例对本发明作进一步说明，附图中：
图1是本发明干法除尘无尘卸灰系统的示意图。
具体实施方式
为了对本发明的技术特征、目的和效果有更加清楚的理解，现对照附图详细说明本发明的具体实施方式。
本发明的干法除尘无尘卸灰方法包括步骤S1-S3，具体如下：
S1、构造干法除尘无尘卸灰系统，如图1所示，其包括粗灰仓1、卸灰主管5、伸缩式金属软管8、事故卸灰管11、地面吸料装置14和耐磨金属软管15。
粗灰仓1的卸灰口和伸缩式金属软管8通过卸灰主管5连接，卸灰主管5上设有手动插板阀6和气动双层翻板阀7。
粗灰仓1顶部设有简易布袋除尘器2和真空压力释放阀3。简易布袋除尘器2用于收集粗灰仓1顶部排出的粉尘。真空压力释放阀3用于防止粗灰仓1内部压力过大。粗灰仓1下锥斗内设有氮气流化装置4用于降低粗灰温度、稀释粗灰中夹杂的煤气和防止粗灰结块。
伸缩式金属软管8顶部设有脉冲阀10，脉冲阀10用于清除伸缩式金属软管8内残留的粗灰。伸缩式金属软管8通过卷扬机9升降，到达运灰车21进灰口。
地面吸料装置14通过事故卸灰管11与粗灰仓1连接，事故卸灰管11上设有事故手动插板阀12和事故气动双层翻板阀13。事故手动插板阀12和事故气动双层翻板阀13开启时，粗灰仓1内的粗灰通过事故卸灰管11进入地面吸料装置14内。打开第二气动球阀18和补气阀19，地面吸料装置14内的粗灰经过耐磨金属软管15送至吸排车22内。
氮气管16分为两路，一路与脉冲阀10连接，另一路与地面吸料装置14的补气阀19连接。
脉冲阀10入口设有第一气动球阀17，第一气动球阀17开启时，脉冲阀10喷吹清灰。
地面吸料装置14的补气阀19入口设有第二气动球阀18，地面吸料装置14出口连接耐磨金属软管15。
S2、输送：手动插板阀6和气动双层翻板阀7开启，伸缩式金属软管8通过卷扬机9将其降至低位，或事故手动插板阀12和事故气动双层翻板阀13开启，粗灰在重力作用下卸至运灰车21或进入地面吸料装置14。地面吸料装置14接收粗灰后，关闭事故气动双层翻板阀13，打开第二气动球阀18，对地面吸 料装置14进行补气，混合均匀的气灰混合物通过耐磨金属软管15送至吸排车22，输送完并吹扫干净。
S3、关闭气动双层翻板阀7，打开第一气动球阀17，脉冲阀10喷吹氮气清除伸缩式金属软管8内残留的粗灰，伸缩式金属软管8通过卷扬机9将其升至高位，关闭第一气动球阀17；或关闭第二气动球阀18和事故气动双层翻板阀13；伸缩式金属软管8或地面吸料装置14恢复输送状态。手动插板阀6或事故手动插板阀12常开，检修时关闭。
本发明的伸缩式金属软管8或地面吸料装置14采用间断输灰的方式。每输送一次粗灰，即为一个循环过程，每个循环包括S2-S3共2个步骤。
进一步的，粗灰仓1的材质为不锈钢。
进一步的，伸缩式金属软管8的材质为不锈钢。
进一步的，耐磨金属软管15的材质为不锈钢。
进一步的，卷扬机装机电容量：1.0～10kW。
本发明干法除尘无尘卸灰方法中的转炉定义为：脱碳转炉或脱磷转炉或熔岩均化炉或不锈钢转炉或提钒转炉。本实施例中的方法适用于50t～400t转炉一次烟气干法除尘粗灰的卸灰。
上面结合附图对本发明的实施例进行了描述，但是本发明并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本发明的启示下，在不脱离本发明宗旨和权利要求所保护的范围情况下，还可做出很多形式，这些均属于本发明的保护之内。

Claims (4)

  1. 一种干法除尘无尘卸灰方法，其特征在于，包括以下步骤：
    S1、构造干法除尘无尘卸灰系统，其包括粗灰仓、卸灰主管、伸缩式金属软管、事故卸灰管、地面吸料装置和耐磨金属软管；
    所述粗灰仓的卸灰口和所述伸缩式金属软管通过所述卸灰主管连接，所述卸灰主管上设有手动插板阀和气动双层翻板阀；
    所述伸缩式金属软管顶部设有脉冲阀，所述伸缩式金属软管通过所述卷扬机升降；所述地面吸料装置通过事故卸灰管与所述粗灰仓连接，所述事故卸灰管上设有事故手动插板阀和事故气动双层翻板阀；
    所述氮气管分为两路，一路与所述脉冲阀连接，另一路与所述地面吸料装置补气管连接；所述脉冲阀入口设有第一气动球阀；所述地面吸料装置入口设有第二气动球阀，所述地面吸料装置出口连接耐磨金属软管；
    S2、手动插板阀和气动双层翻板阀开启，伸缩式金属软管通过卷扬机将其降至低位，或事故手动插板阀和事故气动双层翻板阀开启，粗灰在重力作用下卸至运灰车或进入地面吸料装置；地面吸料装置接收粗灰后，关闭事故气动双层翻板阀，打开第二气动球阀，对地面吸料装置进行补气，混合均匀的气灰混合物通过耐磨金属软管送至吸排车，输送完并吹扫干净；
    S3、关闭气动双层翻板阀，打开第一气动球阀，脉冲阀喷吹氮气清除伸缩式金属软管内残留的粗灰，伸缩式金属软管通过卷扬机将其升至高位，关闭第一气动球阀；或关闭第二气动球阀和事故气动双层翻板阀；伸缩式金属软管或地面吸料装置恢复输送状态。
  2. 根据权利要求1所述的干法除尘无尘卸灰方法，其特征在于，所述粗灰仓顶部设有简易布袋除尘器和真空压力释放阀，所述粗灰仓下锥斗内设有氮气流化装置。
  3. 根据权利要求1所述的干法除尘无尘卸灰方法，其特征在于，所述手动插板阀或事故手动插板阀常开，检修时关闭。
  4. 根据权利要求1所述的干法除尘无尘卸灰方法，其特征在于，所述步骤S2中输送的氮气压力≥0.6MPa。
PCT/CN2018/106355 2017-11-28 2018-09-19 干法除尘无尘卸灰方法 WO2019105109A1 (zh)

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