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2* 150t 无烟煤石灰窑设计技术方案及投资概算

2* 150t Anthracite Lime Kiln Design Technical Scheme and investment estimates

（briefly）

一、 简述：

贵公司要求两套日产 150 吨石灰生产线，我建议用两台 200M3 无烟煤竖窑完成，具体方案及概算如下：

1. Brief description:

Your company requires two sets of lime production lines with a daily output of 150 tons. I propose to use two sets of 200M3 anthracite shaft kilns to complete the production. The specific plans and estimates are as follows:

二、基本参数和指标

1． 窑型为圆型竖窑，单窑容积 220m³有效容积 200m³炉体总高度约 28M 左右。

2． 单窑产量：150—155t/日

3． CaO>80%以上,生过烧率 9%以下。

4． 无烟煤消耗量 145kg/t.灰。

5． 单台窑烟气尘总量 15000-20000Nm³/h 左右。

6． 经除尘净化后烟气排放浓度<30mmg。

Two . Basic parameters and indicators

1. The kiln type is a circular shaft kiln with a single kiln volume of 220m³ and an effective volume of 200m³. The total height of the furnace body is about 28M.

2. Single kiln output: 150—155t/day

3. CaO>80% or more, the raw overburn rate is less than 9%.

4. Anthracite consumption 145kg/t. ash.

5. The total amount of flue gas and dust in a single kiln is about 15000-20000Nm³/h.

6. After dust removal and purification, the emission concentration of flue gas is less than 30mmg.

三、原燃料条件:

1.石灰石; 入窑 粒度 40-80mm,＜40mm＞80mm＜10%。

2.煅烧温度 900-1200℃。

   无烟煤热值>6000 大卡/Nm³;

3.无烟煤粒度 5-15mm,水分≤8%

Three,Raw fuel conditions:

1. Limestone; kiln particle size 40-80mm, <40mm>80mm<10%.

2. The calcination temperature is 900-1200℃.

   Anthracite calorific value>6000 kcal/Nm³;

3. Anthracite particle size 5-15mm, moisture ≤8%

四、200M³竖窑主要结构

       无烟煤石灰窑主体外型为园形竖窑（内部炉体为Φ2.5*m 圆形结构）主要有窑体、上料斜桥、料车、双向密封布料装置、窑中段安装有偏火控制系统，窑下有助燃风机、冷却风机、窑内安装有概率风帽窑外安装有卸灰装置、抽烟除尘和温度仪表及电器控制部分等几部分组成。炉体为金属壳，内砌耐火砖和保温材料另有计量系统和温度控制系统部分组成。

1. Four. Main structure of 200M³ shaft kiln

   The main body of the anthracite lime kiln is a circular shaft kiln (the inner furnace body is a Φ2.5*m circular structure), which mainly includes a kiln body, a feeding inclined bridge, a feeding truck, a two-way sealing and distributing device, and a partial fire control installed in the middle of the kiln. The system consists of a combustion-supporting fan, a cooling fan under the kiln, a probability air cap installed in the kiln, an ash unloading device, a smoke and dust removal device, a temperature instrument and an electrical control part installed outside the kiln. The furnace body is a metal shell, and the inner refractory bricks and insulation materials are also composed of a metering system and a temperature control system.

五、工艺简述

       经筛分处理后的合格石灰石原料和无烟煤经过计算机控制的计量系统按一定的比例配合，共用一套上料系统，由卷杨机拉动料车经斜桥至窑顶经分料仓进入两个窑顶布料装置（专利号 ZL20110307893.6）布入窑内。每座窑在窑体煅烧段周边，装有偏火控制系统（专利号 ZL201120307918.2），石灰石经上层燃烧器煅烧在煅烧带上段基本完成煅烧分解，二层补充空气主要补充中心部位的部分欠烧和增加石灰活性。石灰石在自重作用下的下降过程中，经过复杂的热交换分解和脱炭反应，并伴随着石灰石的晶粒发育成长过程完成煅烧，到冷却带被送入窑内的风冷风冷却， 助燃风经窑内冷却余热换热助燃风送入窑内重新助燃，（专利号 ZL20112037894.0）烧成的石灰由园盘出来机和两段出灰阀在始终保持炉内密封状态下经卸出窑外出灰皮带机上送至成品灰仓。同时窑顶烟尘由抽风机将烟尘引入（重力）旋风除尘和水膜（脱硫）除尘系统对烟尘净化烟尘浓度≤30mg 达到国家要求的环保标准排入大气。

1. Five. Brief description of the process

   After screening, the qualified limestone raw materials and anthracite coal are matched in a certain proportion by the computer-controlled metering system, and share a set of feeding system. The kiln top distribution device (patent number ZL20110307893.6) is distributed into the kiln. Each kiln is equipped with a partial fire control system (Patent No. ZL201120307918.2) around the calcination section of the kiln body. The limestone is calcined by the upper burner in the upper section of the calcination zone to basically complete the calcination and decomposition. Burn and increase lime activity. During the descending process of limestone under the action of its own weight, it undergoes complex heat exchange decomposition and decarbonization reactions, and is calcined along with the development and growth of limestone grains. In the cooling zone, it is cooled by the air-cooled air sent into the kiln, and the combustion-supporting air After cooling the residual heat in the kiln, the combustion-supporting air is sent into the kiln for re-combustion. The outgoing ash belt conveyor is sent to the finished ash warehouse. At the same time, the smoke from the top of the kiln is introduced into the (gravity) cyclone dust removal and water film (desulfurization) dust removal system by the exhaust fan.