WO2017152783A1 - 一种用于高温液态熔渣粒化系统 - Google Patents

一种用于高温液态熔渣粒化系统 Download PDF

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Publication number
WO2017152783A1
WO2017152783A1 PCT/CN2017/074805 CN2017074805W WO2017152783A1 WO 2017152783 A1 WO2017152783 A1 WO 2017152783A1 CN 2017074805 W CN2017074805 W CN 2017074805W WO 2017152783 A1 WO2017152783 A1 WO 2017152783A1
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Prior art keywords
granulator
temperature liquid
liquid slag
granulation system
slag granulation
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English (en)
French (fr)
Inventor
王树众
吴志强
陈林
于鹏飞
孟海鱼
张忠清
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Xian Jiaotong University
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Xian Jiaotong University
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Priority to US16/083,824 priority Critical patent/US10801080B2/en
Publication of WO2017152783A1 publication Critical patent/WO2017152783A1/zh
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C21B3/06—Treatment of liquid slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/022—Methods of cooling or quenching molten slag
    • C21B2400/028—Methods of cooling or quenching molten slag with the permanent addition of cooled slag or other solids
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/02—Physical or chemical treatment of slags
    • C21B2400/034—Stirring or agitating by pressurised fluids or by moving apparatus
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2400/00—Treatment of slags originating from iron or steel processes
    • C21B2400/05—Apparatus features
    • C21B2400/052—Apparatus features including rotating parts
    • 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
    • Y02P10/20—Recycling
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies

Definitions

  • the invention relates to the technical field of high temperature liquid slag waste heat recovery, in particular to a high temperature liquid slag granulation system.
  • China is currently the world's largest steel producer, and steel production has maintained its number one position in the world for 17 consecutive years.
  • China's pig iron production reached 711 million tons, accounting for about 60% of the world's total production.
  • blast furnace slag containing huge heat was also produced.
  • the blast furnace slag is generally discharged at a temperature between 1400 and 1550 ° C.
  • Each ton of slag contains (1260 to 1880) ⁇ 10 3 kJ of sensible heat, equivalent to 60 kg of standard coal.
  • the dry slag pit cooling method and the water slag slag method are the most common blast furnace slag treatment methods in China.
  • the dry slag pit cooling method directly discharges the high-temperature liquid slag into the dry slag pit to be air-cooled, and assists water cooling.
  • the method generates a large amount of water vapor when cooling, and releases a large amount of H 2 S and SO 2 gas, corrodes buildings, damages equipment, and deteriorates the working environment. Generally, the method is used only in accident handling. 90% of blast furnace slag in China is treated by water slag.
  • the water slag method refers to the use of low-temperature cooling water to directly mix with high-temperature liquid slag, so that the liquid slag temperature is rapidly lowered and the glass body slag particles are formed.
  • the water slag method can be divided into Inba method, Tula method, bottom filtration method, Lhasa method and Mintek method according to different process flow.
  • the core of the technology is to spray water quenching of high temperature liquid slag to achieve the purpose of cooling and granulation, and then slag separation, the slag water is recirculated through precipitation filtration. use.
  • vitreous slag produced by this method can be used in the cement industry for resource utilization, the process wastes a lot of water resources, generates harmful gases such as SO 2 and H 2 S, and cannot effectively recover the high temperature liquid slag. Quality waste heat resources.
  • the object of the present invention is to provide a high-temperature liquid slag granulation system, which has uniform granulation, high heat recovery efficiency, and can recover heat of liquid slag without pollution.
  • a high-temperature liquid slag granulation system comprising a granulator, a granulator connecting part and a granulator driving part; the granulator is in the form of a disk or a cup, and a guiding cone is arranged at the center of the granulator a flow cone to the outer edge of the granulator is provided with ribs; the granulator is connected to the granulator driving part through a granulator connecting part; the granulator driving part is used to drive the granulator to rotate through the granulator connecting part, and the drips The liquid slag in the granulator is granulated into small droplets.
  • the granulator connecting part comprises a granulator base, a rotating shaft and two thrust bearings; the granulator is fixedly connected with the granulator base, the granulator base is fixedly connected with the shaft; the shaft passes through two thrust bearings and a sleeve The barrel is fixed while being coupled to the granulator drive unit via a coupling.
  • edge of the granulator is at an angle of 15° to 60° with respect to the horizontal plane.
  • the air supply component is further included; the air supply component comprises two air duct outer sleeves having different outer diameters, and an inner sleeve of the air duct, wherein the shaft sleeve is fixed to the inner sleeve of the air duct through the bottom annular end cover; the top of the air supply assembly is opened Ring tuyere.
  • annular tuyere is located at the outer periphery of the granulator, and the outlet angle of the annular tuyere is consistent with the inclination angle of the edge of the granulator, and the angle with the horizontal plane is 15-60°.
  • annular tuyere is located below the outer edge of the granulator.
  • shaft sleeve is provided with cooling air holes on both sides of the two thrust bearings.
  • the present invention has the following beneficial effects:
  • the annular wind can enhance the edge of the rotor and disturb the granulation effect.
  • the annular wind accelerates the convective heat transfer of the liquid slag particles, accelerates the cooling rate, and increases the glass phase ratio.
  • the annular wind can be used to enhance the cooling of the motor shaft to prevent overheating of the motor end.
  • the structure of the annular end cap and the like in the invention can effectively reduce the air flowing back to the atmosphere in the granulation chamber and pollute the external environment.
  • the suspension structure of the motor of the present invention can effectively prevent the thermal expansion from being inconsistent in the direction of thermal expansion.
  • the reverse flow cone can effectively reduce the impact force of the slag.
  • FIG. 1 is a schematic view of a granulating device for granulating liquid slag and recovering part of heat
  • a high temperature liquid slag granulation system of the present invention comprises a granulator 1, a granulator connecting part, a granulator driving part, a wind supplying part and an auxiliary device.
  • the granulator 1 is in the form of a disk or a cup.
  • the granulator 1 is provided with a flow guiding cone at the center, and the guiding cone is connected to the outer edge of the granulator 1; the edge of the granulator 1 is at an angle of 15-60° with the horizontal plane;
  • the granulator connecting member is a granulator base 2, a rotating shaft 3 and a thrust bearing 4; the granulator 1 and the granulator base 2 are connected by bolts, and the granulator base 2 and the shaft 3 are connected by a key.
  • the shaft 3 is fixed to the shaft sleeve 9 through the thrust bearing 4, and is connected to the motor 10 through the coupling;
  • the air supply assembly is composed of two air duct outer sleeves 7 and air duct inner sleeves 8 having different outer diameters, and the shaft sleeve 9 is fixed to the inner tube sleeve 8 through the bottom annular end cover 5;
  • the outer tube sleeve 7 is fixed to the fixed sleeve and the plate 6 on the outside.
  • the annular tuyere 11 opened at the top of the air supply assembly is located at the outer periphery of the granulator 1, and the outlet angle of the annular tuyere is consistent with the inclination angle of the edge of the granulator, and the angle with the horizontal plane is 15-60.
  • the air duct inner sleeve 8 and the shaft sleeve 9 are provided with an annular air outlet at the upper portion, and the shaft sleeve is provided with cooling air holes on both sides of the two thrust bearings 4.
  • the liquid slag in the slag bag enters the granulation bin through the slag pipe under the control of the plug rod, and falls on the granulator 1, and the high-speed rotating granulator 1 will flow the liquid slag particles flowing into the rotor cup.
  • the small droplets are formed, and the small droplets are splashed into the large space of the granulation chamber.
  • the surface becomes a hard outer surface. Slag particles.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
  • Manufacture Of Iron (AREA)

Abstract

一种液态熔渣粒化系统，包括粒化器（1）、粒化器连接部件和粒化器驱动部件，粒化器（1）为盘状或杯状，粒化器（1）中心处设置导流锥，粒化器驱动部件带动粒化器进行旋转，将液态熔渣粒化。该系统还包括供风组件。

Description

一种用于高温液态熔渣粒化系统 技术领域
本发明涉及高温液态熔渣余热回收技术领域，特别涉及一种用于高温液态熔渣粒化系统。
背景技术
中国目前是全球最大的钢铁生产国，钢铁产量已连续17年保持世界第一。2014年中国生铁产量达到7.11亿吨，约占世界总产量的60％，在冶炼生铁的过程中同时会产生蕴含巨大热量的高炉渣。高炉渣的出炉温度一般在1400～1550℃之间，每吨渣含(1260～1880)×103kJ的显热，相当于60kg标准煤。在我国现有的炼铁技术下，每生产1吨生铁副产0.3吨高炉渣，以目前我国生铁产量7.11亿吨进行计算，可折合产生2.13亿吨以上的高炉渣，其显热量相当于1278万吨标准煤。
干渣坑冷却法和水冲渣法是目前我国最常见的高炉渣处理方法。干渣坑冷却法将高温的液态熔渣直接排入干渣坑空冷，辅助水冷。该法降温时产生大量水蒸气，同时释放出大量的H2S和SO2气体，腐蚀建筑、破坏设备和恶化工作环境，一般只在事故处理时使用该法。我国90％的高炉渣都采用水冲渣法处理。水冲渣法是指利用低温的冷却水直接与高温的液态熔渣混合，使得液态熔渣温度迅速降低并形成玻璃体态炉渣颗粒。水冲渣法按照不同的工艺流程可分为因巴法、图拉法、底滤法、拉萨法、明特克法。尽管水冲渣工艺不断发展，但其技术的核心还是对高温液态熔渣进行喷水水淬，进而达到冷却和粒化的目的，然后进行水渣分离，冲渣的水经过沉淀过滤后再循环使用。尽管该法产生的玻璃体态熔渣可以应用于水泥工业进行资源化利用，但是处理过程浪费大量水资源，产生SO2和H2S等有害气体，也不能有效回收高温液态熔渣所含有的高品质余热资源。
综上所述，目前普遍采用的干渣坑冷却法和水冲渣法，不仅浪费了高温液态熔渣所含有的 全部高品质余热资源，而且消耗大量水资源，对环境造成严重污染，这些处理方式已不能适应目前钢铁行业节能减排的迫切需求。必须寻求一种高效、无污染的新技术对液态熔渣资源进行有效回收。
发明内容
本发明的目的在于提供一种用于高温液态熔渣粒化系统，其粒化均匀、热量回收效率高，可无污染的回收液态熔渣的热量。
为了实现上述目的，本发明采用的技术方案是：
一种用于高温液态熔渣粒化系统，包括粒化器、粒化器连接部件和粒化器驱动部件；粒化器为盘状或杯状，粒化器中心处设置导流锥，导流锥至粒化器外边缘设置肋片；粒化器通过粒化器连接部件连接粒化器驱动部件；粒化器驱动部件用于通过粒化器连接部件带动粒化器进行旋转，将滴入粒化器中的液态熔渣粒化成小液滴。
进一步的，粒化器连接部件包括粒化器底座、转轴及两个推力轴承；粒化器与粒化器底座固定连接，粒化器底座与轴固定连接；轴通过两个推力轴承与轴套筒固定，同时通过联轴器与粒化器驱动部件相连接。
进一步的，粒化器边缘与水平面角度为15°-60°。
进一步的，还包括供风组件；供风组件包括两个外径不同的风道外套筒、风道内套筒，轴套筒通过底部环形端盖与风管内套筒固定；供风组件顶部开设有环形风口。
进一步的，环形风口位于粒化器外周，环形风口的出风角度与粒化器边缘倾角一致，与水平面夹角为15-60°。
进一步的，环形风口位于粒化器外边缘下方。
进一步的，轴套筒在两推力轴承两侧均开冷却风孔。
相对于现有技术，本发明据有以下有益效果：
(1)本发明中环形风可加强转杯边缘扰动，加强粒化效果。
(2)本发明中环形风可加速液态渣粒的对流换热，加快冷却速率，增加玻璃相率。
(3)本发明中套筒结构可利用环形风加强电机轴的冷却，防止电机端过热。
(4)本发明中环形端盖等结构可有效减少粒化仓中空气倒流至大气，污染外部环境。
(5)本发明中电机悬挂结构可有效防止热膨胀方向不一致产生热应力。
(6)本发明中倒流锥可有效减少熔渣的冲击力。
附图说明
下面结合附图和具体实施方式对本发明做进一步详细说明。
图1为本发明的粒化液态熔渣并回收部分热量的粒化装置示意图；
1、粒化器；2、粒化器底座；3、转轴；4、推力轴承；5、环形端盖；6、固定套筒及平板；7、风道外套筒；8、风道内套筒；9、轴套筒；10、电机；
具体实施方式
请参阅图1所示，本发明一种用于高温液态熔渣粒化系统，包括粒化器1、粒化器连接部件、粒化器驱动部件、供风部件及辅助装置。
粒化器1为盘状或杯状，粒化器1中心设置导流锥，导流锥至粒化器1的外边缘设施肋片；粒化器1边缘与水平面角度为15-60°；粒化器连接部件为粒化器底座2、转轴3及推力轴承4；粒化器1与粒化器底座2通过螺栓相连，粒化器底座2与轴3通过键进行连接。轴3通过推力轴承4与轴套筒9固定，同时通过联轴器与电机10相连接；供风组件由两个外径不同的风道外套筒7、风道内套筒8组成，轴套筒9通过底部环形端盖5与风管内套筒8固定；风管外套筒7在外部与固定套筒及平板6固定。供风组件顶部所开环形风口11位于粒化器1外周，环形风口的出风角度与粒化器边缘倾角一致，与水平面夹角为15-60°。
风道内套筒8与轴套筒9在上部开有环形风口，轴套筒在两推力轴承4两侧均开冷却风孔。
渣包中的液态熔渣在塞棒的控制下以一定的流量通过落渣管进入粒化仓，落在粒化器1上，高速旋转的粒化器1将流入转杯的液态熔渣粒化成小液滴，小液滴飞溅至粒化仓的大空间内，小液滴飞行过程中在粒化仓受热面和粒化器环形风的双重冷却作用下，变成具有硬质外表面的渣粒。
最后应说明的是：以上实施方式仅用以说明本发明而非限制本发明所描述的技术方案；因此，尽管本说明书参照上述的各个实施方式对本发明已进行了详细说明，但是，本领域的普通技术人员应当理解，仍然可以对本发明进行修改或等同替换；而一切不脱离本发明的精神和范围的技术方案及其改进，其均应涵盖在本发明的权利要求范围中。

Claims (7)

  1. 一种用于高温液态熔渣粒化系统，其特征在于：包括粒化器(1)、粒化器连接部件和粒化器驱动部件；
    粒化器(1)为盘状或杯状，粒化器中心处设置导流锥，导流锥至粒化器外边缘设置肋片；
    粒化器(1)通过粒化器连接部件连接粒化器驱动部件；粒化器驱动部件用于通过粒化器连接部件带动粒化器(1)进行旋转，将滴入粒化器(1)中的液态熔渣粒化成小液滴。
  2. 根据权利要求1所述的一种用于高温液态熔渣粒化系统，其特征在于：粒化器连接部件包括粒化器底座(2)、转轴(3)及两个推力轴承(4)；粒化器(1)与粒化器底座(2)固定连接，粒化器底座(2)与轴(3)固定连接；轴(3)通过两个推力轴承(4)与轴套筒(9)固定，同时通过联轴器与粒化器驱动部件相连接。
  3. 根据权利要求1所述的一种用于高温液态熔渣粒化系统，其特征在于：粒化器边缘与水平面角度为15°-60°。
  4. 根据权利要求1所述的一种用于高温液态熔渣粒化系统，其特征在于：还包括供风组件；供风组件包括两个外径不同的风道外套筒(7)、风道内套筒(8)，轴套筒(9)通过底部环形端盖(5)与风管内套筒(8)固定；供风组件顶部开设有环形风口(11)。
  5. 根据权利要求4所述的一种用于高温液态熔渣粒化系统，其特征在于：环形风口(11)位于粒化器(1)外周，环形风口的出风角度与粒化器边缘倾角一致，与水平面夹角为15-60°。
  6. 根据权利要求4所述的一种用于高温液态熔渣粒化系统，其特征在于：环形风口(11)位于粒化器外边缘下方。
  7. 根据权利要求4所述的一种用于高温液态熔渣粒化系统，其特征在于：轴套筒在两推力轴承(4)两侧均开冷却风孔。
PCT/CN2017/074805 2016-03-11 2017-02-24 一种用于高温液态熔渣粒化系统 Ceased WO2017152783A1 (zh)

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US16/083,824 US10801080B2 (en) 2016-03-11 2017-02-24 High-temperature liquid slag granulating system

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CN201610141188.0 2016-03-11
CN201610141188.0A CN105624348B (zh) 2016-03-11 2016-03-11 一种用于高温液态熔渣粒化系统

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