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1、1,冷却过程 COOLING PROCESS,冷却过程是在一定的时间内将产品 的温度和水分平衡到标准质量状态 的一种热交换过程。 The process balanced temperature and humidity of the product to standard quality within limited time,定义 / Definition,2,温度平衡 TEMPERATURE EQUILIBRIUM,热通过蒸发过程而变成水蒸汽 HEAT USED FOR EVAPORATION PROCESS TO VAPOR 热通过热的传播过程传递到冷却介质上 HEAT TRANSFE
2、R TO COOLANT (MOIST AIR) THROUGH THERMAL DIFFUSION PROCESS,3,- 毛细管作用造成的液体流动 LIQUID MOVEMENT DUE TO CAPILLARITY 渗透力造成的液体流动 LIQUID MOVEMENT DUE TO OSMOTIC FORCE - 水份差异造成的液体流动（液体扩散作用） LIQUID MOVEMENT DUE TO MOISTURE CONCENTRATION DIFFERENCE (LIQUID DIFFUSION),温度平衡 TEMPERATURE EQUILIBRIUM,4,- 重力造成的液体流动
3、LIQUID MOVEMENT DUE TO GRAVITY - 水份差异造成的蒸汽流动（蒸汽扩散作用） VAPOR MOVEMENT DUE TO MOISTURE CONCENTRATION DIFFERENCE (VAPOR DIFFUSION) - 温度差异造成的蒸汽流动（热扩散作用） VAPOR MOVEMENT DUE TO TEMPERATURE DIFFERENCE (THERMAL DIFFUSION),温度平衡 TEMPERATURE EQUILIBRIUM,5,冷却过程 Cooling Process,1. 蒸发 EVAPORATION 2. 热扩散 THERMAL DI
4、FFUSION 3. 机械或化学力造成的液体流动 Liquid movement by Mechanical 蒸发 34 KGs.水需要的热量 So; Heat used to evaporate water 34 KGs. = 34*2,360 KJ. = 80,240 KJ 颗粒必须传递的热量 Heat must be transferred from pellets = 80,240 - 102,600 = 22,360 KJ.,22,空气体积需要量: / Air volume required: 由 Q = mc (t2 - t1) 故; 22,360 = m*1*(45 - 30)
5、空气重量需要量 (m). / Air weight required(m) = 22,360 / 15 = 1,490 KGs 单位空气体积重量 / Weight of air by volume = 1.2 KGs./ 1 m3 故; 空气体积需要量 / So; Air volume required = 1,490 / 1.2 = 1,240 m3 估计的空气体积需要量 1,200 m3/ton-颗粒 Estimated air volume require 1,200 m3/ton-pellets,冷却过程空气体积需要量 Air Volume for Cooling Process,23
6、,颗粒位置与空气流量对环境空气与颗粒间的蒸发和热扩散的影响 Evaporation and Thermal Diffusion Effected between Ambient Air and Pellets at Different Layer And Different Air Volume,24,冷却器后颗粒温度、水份与空气流量之间的关系 Relation of Temperature, Moisture of pellets after cooler and Air Volume,低温,低水份 Low Temp., Low Moisture,高温，高水份 Highest Temp.,
7、Highest Moisture, 800 m3/t,1000 m3/t,高温，高水份 High Temp., High Moisture,低温，高水份 Low Temp., Higher Moisture,1200 m3/t,1500 m3/t, 1800 m3/t,正常温度，正常水份 Normal Temp., Normal Moisture,25,空气流速过高的影响 Effected from Excessive Air Velocity,滑动式排料机构的适宜气流速度: 1.2 m/s (在冷却机最大产能上) 翻板式排料机构的适宜气流速度: 1.3 m/s (在冷却机最大产能上),App
8、ropriate air velocity for Slide Grid Discharge System : 1.2 m/s at max cooler capacity Appropriate air velocity for Swivel Valve Discharge System :1.3 m/s at max cooler capacity,26,不能排料或排料不连续; Cannot discharge pellets from cooler or inconsistent discharge 颗粒开裂或风道吸入粉尘; Cracked pellets or dust is suck
9、ed up to air duct. 料层一直上下移动,使颗粒料在冷却器中停留时间变化不定。 因而造成颗粒料排出冷却器后有效水份和温度不均。 Pellets layer move up and down all the time and cause the time of pellets in cooler are different. So these effect moisture and temperature after discharge cooler are uneven. 引起料层出现空洞，使多数冷却空气由此穿过。 Cause of the holes in the produc
10、t layer. So most air is flowed through these hole,空气流速过高的影响 Effected from Excessive Air Velocity,27,逆流式冷却器的主要部件 Important component of COUNTERFLOW COOLER,1. 喂料闭风器 INLET ROTARY VALVE 2. 顶盖 / HOOD 3. 分料器 / PRODUCT DISTRIBUTOR 4. 冷却室 / COOLER BIN 5. 排料门 / DISCHARGE GATE 6. 支架 / SUPPORT FRAME 7. 集料斗 / C
11、OLLECTING HOPPER 8. 排料传感器 DISCHARGE LEVEL SENSOR 9. 溢料传感器 OVERFLOW LEVEL SENSOR 10.装有着火调温器的出风管 AIR OUTLET WITH FIRE THERMOSTAT,28,逆流式冷却器的附属部件 Accessory part of COUNTERFLOW COOLER,29,固定分料器 / STATIONARY PRODUCT DISTRIBUTOR,分料器 PRODUCT DISTRIBUTOR,1. 在上下与水平方向上调节分料器以使颗粒料进入冷却机箱体时分散均匀。 Adjust product dist
12、ributor vertically and horizontally for distribute pellets to the cooler housing. 2. 调节分料器中间间隙，以控制颗粒料在中间位置和四周的数量。 Adjust the gap of product distributor for control pellets quantity at the middle and the corner of cooler,30,旋转分料器 / ROTATING PRODUCT DISTRIBUTOR,分料器 PRODUCT DISTRIBUTOR,31,旋转分料器 ROTATIN
13、G PRODUCT DISTRIBUTOR,调节分料器(1)的角度使颗粒料流经散料器进入冷却器。 Adjust the angle of the product distributor(1) for control the distribution of pellets through the cooler housing. 分料板之间的距离可以靠松掉螺栓(2)来调节。下端的间隙应大于上端的间隙。 The gap between the distributor trays can be adjusted by releasing the bolts (2) and sliding the tr
14、ays. The lower gap should be larger than the upper gap.,32,滑动式排料门 SLIDE GRID DISCHARGE GATE,33,顶部框（1）为固定框，中间框（2）为活动框 由电机驱动, 下面的工作框(3)的位置改变 依靠气缸驱动 TOP GRID(1) STATIONARY GRID, MIDDLE GRID(2) MOVABLE GIRD DRIVE BY MOTOR, LOWER GRID(3) CHANGE POSITION DRIVE BY PNUEMATIC CYLINDER,排料位置 / DISCHARGE MOVEME
15、NT,不排料位置 / CLOSED POSITION,清料时，框 (3) 向右移动 CLEAN OUT (3) MOVE TO RIGHT,动力切断时，框 (3) 移动到左边 POWER FAIL (3) MOVE TO LEFT,滑动式排料门 / SLIDE GRID DISCHARGE GATE,34,Control circuit,35,翻板式排料门 SWIVEL VALVE DISCHARGE GATE,36,关闭位置 CLOSED POSITION,打开位置 OPEN POSITION,清料位置 CLEAN OUT,翻板式排料门 SWIVEL VALVE DISCHARGE GATE
16、,37,翻板式排料门 SWIVEL VALVE DISCHARGE GATE,38,关闭位置 CLOSED POSITION,打开位置 OPEN POSITION,清料位置 CLEAN OUT,翻板式排料门 SWIVEL VALVE DISCHARGE GATE,39,Timer for delay discharge time of the next stroke.,When “Clean Out” Circuit will force Open solenoid.,控制电路 Control circuit,40,溢料料位传感器 OVERFLOW LEVEL SENSOR 当颗粒料触到这个传感器执行部位时，控制电路切断制粒机喂料器。 When the product reaches the active part of this se
