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垃圾焚烧飞灰卧螺离心机

垃圾焚烧飞灰资源化利用

WASTE INCINERATION FLY ASH RESOURCE UTILIZATION

 

成都智楷分离科技有限公司

CHENGDU ZK SEPARATION TECHNOLOGY CO., LTD.

 


 


一、垃圾焚烧飞灰介绍
I. Introduction to waste incineration fly ash

飞灰垃圾焚烧发电厂烟气净化系统收集而得的容重较轻、粒径细小的粉体物质飞灰中不仅含有大CdCrCuNiPbZn等重金属无机有害物含有钾、钠、m离子等可溶性物质),还富集了高浓度的具有强毒性的二噁英等有机致癌物是国家指定的危险废物代号 HW18)。
Fly ash is a powder material with light weight and fine particle size collected by the flue gas purification system in a waste incineration power plant. The ash contains not only a large amount of heavy-metal inorganic harmful substances such as Cd, Cr, Cu, Ni, Pb and Zn, but also soluble substances (salt) like potassium, sodium, and m ions, and it is enriched with highly toxic dioxins and other organic carcinogens of high concentration. Fly ash is a nationally designated hazardous waste (code HW18).


二、垃圾焚烧飞灰资源化利用
II. Utilization of waste incineration fly ash resources

目前飞灰以固化填埋为主,飞灰规范填埋处置率比较低,同时填埋处理会留下巨大生态安全隐患利用化学药剂螯合处理飞灰中重金属的主要问题是对二噁英和溶解盐无明显稳定作用,且化学药剂处理后的飞灰在环境中的长期稳定性不确定,特别是在酸性环境中该问题更加突出。尽管目前政策上允许飞灰螯合固化填埋,但昂贵螯合剂能否长期稳定有效还难有定论,随着时间的迁移,部分填埋场地质条件的变化,項埋场的渗漏已经成为危害环境的毒瘤和定时炸弹。同时在人口稠密的中东部地区,地区经济发达、人口稠密、土地资源稀缺,可用来填埋的土地资源已极其有限,飞灰正面临着填埋场枯竭的严重压力。
At present, fly ash is mainly solidified landfill, and the disposal rate of fly ash is fairly low. Meanwhile, landfill disposal will leave behind a huge ecological safety hazard. The main difficulty in chelation of heavy metals in fly ash using chemical agents is that there is no obvious stabilizing effect on dioxins and dissolved salts, and the long-term stability of fly ash after chemical treatment in the environment is uncertain, especially prominent in acidic environment. Although the current policy allows fly ash to be solidified and landfilled, it is still difficult to determine whether the expensive chelating agent can be effective and stabilized for a long time. As time goes by, the quality of some landfill sites changes, and the leakage of the landfill site has become a malignant tumor and a time bomb to the environment. In the meantime, in the densely populated central and eastern regions of developed economy and scarce land resources, the land resources that can be used as landfill are extremely limited, and fly ash is confronted with the severe pressure of landfill depletion.

2012116日,国内首条水泥窑协同处理垃圾焚烧飞灰示范线在北京金隅琉水环保科技有限公司建成运行,通过201410月的升级改造和20181月第二条生产线的投产运行,目前已经成为年处理飞灰7万吨能力的环保型企业,承担了北京市的飞灰处置任务,被列为"城市保障企业",通过一系列的处理工艺,使飞灰真正达到了"零排放"标准
On November 6, 2012, the first domestic cement kiln co-processing waste incineration fly ash demonstration line was completed and operated in Beijing Jinyu Water Protection Technology Co., Ltd, which, after the upgrading and transformation in October 2014 and the operation of the second production line in January 2018, has become an environmentally-friendly company that handles 70,000 tons of fly ash yearly, has carried out the task of disposing fly ash in Beijing, and has been listed as a “city guarantee enterprise”. With a series of treatment processes, the "zero emission" standard has been met.

目前浙江省内有多家企业正在着手垃圾焚烧飞灰资源化利用工程,处置后的飞灰有用于水泥企业作为替代原料,也有用于城市基建用水泥砖替代原料等等;不论何种处理工艺和飞灰的最终出路,都是为了解决飞灰污染,打造成城市环境安全的保障性企业,其中水泥生产企业由"资源消耗型"的工业生产企业升级为"飞灰终结者"的城市污染消纳型企业。
Currently, a number of enterprises in Zhejiang Province are embarking on the utilization project of waste incineration fly ash resources. The disposed fly ash is used as a substitute material for cement enterprises and also a substitute for cement bricks in urban infrastructure; the ultimate goal is to solve fly ash pollution and establish a guarantee enterprise for urban environmental safety. In the meantime, cement production enterprises are upgraded from "resource-consumption" industrial producers to "fly ash terminator" of urban pollution.


三、垃圾焚烧飞灰资源化利用
III. Utilization of waste incineration fly ash resources

要实现垃圾焚烧飞灰资源化利用,其关键技术是如何脱氯和分解二噁英,并使飞灰中的重金厲处于固化状态。
To realize the resource utilization of waste incineration fly ash, the key technology is how to dechlorinate and decompose dioxin and make the heavy metal in the fly ash in a solidified state.

洗脱除盐是关键
Salt removal as key process

垃圾焚烧飞灰具有高氯、硫、碱、钾、钠的特征直接入窑容易成为水泥窑结皮堵塞的诱因
 Waste incineration fly ash features high chlorine, sulfur, alkali, potassium, and sodium, which are easy to cause cement kiln crust and blockage without treatment;

飞灰的脱氯---为了提高水泥窑处置飞灰的能力避免水泥窑结皮堵塞飞灰的脱氯处理则是决定能否利用水泥窑协同处置的关键因索
 Dechlorination of fly ash–To improve the capability of the cement kiln to dispose fly ash and avoid clogging, the dechlorination treatment of fly ash is the critical reason for determining whether to adopt cement kiln co-disposal technology;

最有效和经济的脱氯方式---水漂洗
 The most effective and economical dechlorination method - water rinsing.

飞灰水洗脱氯、最终零排放工艺简介
Brief introduction to fly ash chlorine elution by water cleaning and final “zero emission” processes


四、垃圾焚烧飞灰水洗后脱水的核心设备---离心机
IV. Core equipment for dewatering of waste incineration fly ash after washing – centrifuge

飞灰的物理性质
 Physical properties of fly ash

物料粒度平均粒度为10μm左右其中<5μm的颗粒占20-25%;飞灰与水按一定的工艺比例制浆浆体物性粘稠类似于脱硫石膏的浆体碱性强PH > 12,原浆较易沉降飞灰物料密度0.4-1.0
Material particle size: The average particle size is about 10 μm, of which <5 μm particles account for 20-25%; fly ash and water are pulped at a certain process ratio, and the slurry is viscous; similar to the slurry of desulfurized gypsum, it is strong in alkali (pH > 12), the slurry easier to settle, and the fly ash material density 0.4-1.0;

飞灰的化学组成
 Chemical composition of fly ash

飞灰的主要化学成分为Ca(OH)235-40%SiO220%左右、氯离子占18-22%、钾钠离子占7-8%左右、其他成分主要为无机类氧化物
Main chemical composition of fly ash: 35-40% Ca(OH)2, 20% SiO2, 18-22% chloride ions, about 7-8% potassium and sodium ions, and other components mostly inorganic oxidation;

飞灰浆体脱水专用离心机的技术特点
 Technical characteristics of special centrifuge for fly ash slurry dewatering

?极低地基建费用投入、良好的现场操作环境
? Extremely low infrastructure investment and good on-site operating environment

相对于传统的过滤型设备(板框压滤机、带式过滤机等),离心机具有结构紧凑、高效,占地面积仅为1/3左右,无需配备辅助气源、高压水等,设备进出口管路结构更简单。而且全封闭运行,操作环境更加人性化。
Compared with the conventional filter-type equipment (plate-and-frame filter, belt filter, etc.), the centrifuge is compact and efficient, covering only about a third of land, needless of auxiliary gas source, high-pressure water, and with simpler pipe structures at the inlet and outlet. And it features fully enclosed operation and more user-friendly operating environment.

?运行稳定性
? Operational stability

过滤型设备(板框压滤机、带式过滤机等)是利用过滤方式去除固体颗粒,粘稠的固体颗粒扱易造成滤布的堵塞,造成脱水性能下降,粘接后的滤布无法实现再生.而离心机是依靠固液本身存在的比重差,借助高速旋转产生的离心力,使固液快速实现分离,从而使生产线连续、稳定运行变成了现实,也降低了后续的维护费用和操作人员的劳动强度。
Filter type equipment (plate-and-frame press, belt filter, etc.) is used to remove solid particles by filtration. Viscous solid particles easily cause clogging of the filter cloth, reducing the dehydration performance, and the filter cloth after bonding cannot be reused. The centrifuge, however, relies on the difference in specific gravity of the solid-liquid itself. The centrifugal force generated by high-speed rotation quickly separates solid from liquid, making the production line realize continuous and stable operation, and lowering the subsequent maintenance cost and the labor intensity of operators.


?离心机的耐磨措施和手段离心机稳定运行和降低后期运行费用的关键技术之一
? Centrifuge wear-resistant measures and means (one of the key technologies for stable operation of the centrifuge and for reduction of later-stage operating cost)

 

?全自动控制模式从启动-分离-清洗-停机全部实现了程序化自动控制模式减少了设备运行期间的人为干预降低了操作人员素质的要求
? Fully automatic control mode: Programmatic automatic control mode from start to separation to cleaning to stop reduces human intervention during the operation of the equipment and lowers the requirements on operator quality;

?智能化控制模式配备了测振、测温、速度等传感器预判和解决设备运行故障的能力得到了加强
? Intelligent control mode: It is equipped with sensors for vibration measurement, temperature measurement, speed, etc., which strengthens the capability to predict and solve equipment operation failures;

 

飞灰残氯含量
 Fly ash residual chlorine content

离心机在三级水洗后脱水的渣相含水控制是保证飞灰残氯含量的关键。【智楷分离】离心机处理后飞灰残氯含量可稳定控制在≤0.5?1%
The water content control of the slag phase after the three-stage water rinsing by the centrifuge is the key to ensure the residual chlorine content of the fly ash. After treatment by the [ZK Separation] centrifuge, the residual chlorine content of fly ash can be stably controlled at ≤0.5~1%.


飞灰处置能力和离心机配置
 Fly ash disposal capacity and centrifuge configuration


五、离心机型号及技术参数
V. Three-phase centrifuge model and technical parameters

项目
Item

单位
Unit

LW450×1845B

LW520×2150B

LW580×2400B

LW650×2600B

处理量
Throughput

m3/h

10-15

25-30

30-35

40-50

转鼓直径
Roller diameter

mm

450

520

580

650

长径比
Length-diameter ratio

 

4.1

4.1

4.1

4

转速
Speed

rpm

3200

2800

2600

2400

分离因数
Separation factor

 

2580

2283

2352

2097

差转速
Differential speed

rpm

1~34

1~34

1~30

1~28

主电机功率
Main motor power

kW

37

55

75

90

副电机功率
Ancillary motor power (kW)

kW

15

18.5

22

30

重量
Weight

kg

4200

5200

6500

7800

外形尺寸 (长××高)
Boundary dimension (L*W*H)

mm

4300×1150×1450

5100×1250×1600

5520×1450×1700

6000×1650×1800

说明:处理里与物料特性有关。
Note: The throughput is related to material characteristics.


相关标签:卧螺离心机,

来源:http://www.zkseparation.com/product144329.html

发布时间 : 2019-03-06 10:30:08