蜜臀国产在线观看

　　一、气力输送输送过程

　　1、 Pneumatic conveying process

　　本系统采用仓泵间歇式输送方式，每输送一泵飞灰，即为一个工作循环。每个工作循环分四个阶段。

　　This system adopts the intermittent conveying mode of the bin pump, and each pump of fly ash conveyed is a working cycle. Each work cycle is divided into four stages.

　　1.进料阶段

　　1. Feeding stage

　　进料阀呈开启状态，进气阀和出料阀关闭，仓泵内部与灰斗连通;?仓泵内无压力(与除尘器内部等压），飞灰源源从除尘器灰斗进入仓泵，当仓泵内飞灰灰位高至与料位计探头接触，则料位计产生一料满信号，并通过现场控制单元进入程序控制器。在程序控制器控制下，系统自动关闭进料阀，进料状态结束。

　　The inlet valve is in the open state, the inlet valve and outlet valve are closed, and the interior of the bin pump is connected to the ash hopper;? There is no pressure inside the bin pump (equal pressure to the inside of the dust collector), and the fly ash source enters the bin pump from the dust collector hopper. When the fly ash level in the bin pump is high enough to contact the level gauge probe, the level gauge generates a full signal and enters the program controller through the on-site control unit. Under the control of the program controller, the system automatically closes the feeding valve and the feeding state ends.

　　2.加压流化阶段

　　2. Pressure fluidization stage

　　进料阀关闭后，打开进气阀，压缩空气通过流化盘均匀进入仓泵，仓泵内飞灰充分流态化，同时?压力升高，当压力高至压力表?上限压力时，则双压力开关输出上限压力信号至控制系统，系统自动打开出料阀，加压流态化阶段结束，进入输送阶段。

　　After the feed valve is closed, open the intake valve, and compressed air enters the bin pump evenly through the fluidized disc. The fly ash in the bin pump is fully fluidized, and at the same time? When the pressure rises to the pressure gauge? When the upper limit pressure is reached, the dual pressure switch outputs the upper limit pressure signal to the control system. The system automatically opens the discharge valve, and the pressurized fluidization stage ends, entering the conveying stage.

　　3.输送阶段

　　3. Transportation stage

　　出料阀打开，此时仓泵边继续进气，一边气灰混和物通过出料阀进入输灰管道，并输送至灰库。当仓泵内飞灰输送完后，管路阻力下降，仓泵内压力降低:当仓泵内压力降低至双压力开关整定的下限压力时，输送阶段结束，进入吹扫阶段，但此时进气和出料阀仍保持开启状态。

　　The discharge valve is opened, and the bin pump continues to intake air while the gas ash mixture enters the ash conveying pipeline through the discharge valve and is transported to the ash silo. After the fly ash is transported in the bin pump, the pipeline resistance decreases and the pressure inside the bin pump decreases: when the pressure inside the bin pump decreases to the lower limit pressure set by the dual pressure switch, the conveying stage ends and enters the purging stage, but the inlet and outlet valves remain open at this time.

　　4.吹扫阶段

　　4. Purging stage

　　进气和出料阀仍开启，压缩空气吹扫仓泵和输灰管道。定时一段时间后，吹扫结束，关闭进气阀、出料阀，然后打开进料阀，仓泵恢复到进料状态。至此，包括四个阶段的一个输送循环结束，重新开始下一个输送循环。

　　The intake and discharge valves are still open, and compressed air is used to blow the bin pump and ash conveying pipeline. After a certain period of time, the blowing is completed, the inlet valve and outlet valve are closed, and then the inlet valve is opened, and the bin pump returns to the feeding state. At this point, one conveying cycle consisting of four stages ends, and the next conveying cycle begins again.

　　六、输送流态

　　6、 Transport flow state

　　1.仓泵内流态

　　1. Flow state inside the bin pump

　　补.加压流化阶段

　　a. Pressure fluidization stage

　　进料阀和出料阀都关闭，压缩空气通过流化盘进入仓泵。仓泵下锥体内飞灰呈均匀流态化，灰气充分混和，同时仓泵内压力升高，此时如同一压力流化床。

　　Both the inlet and outlet valves are closed, and compressed air enters the bin pump through the fluidized bed. The fly ash in the lower cone of the silo pump is uniformly fluidized, and the ash gas is fully mixed. At the same time, the pressure inside the silo pump increases, and it is like a pressure fluidized bed.

　　产.输送阶段

　　b. Transportation stage

　　出料阀呈开启状态，灰气混和物进入输灰管道，同时压缩空?气通过流化盘进入仓泵。仓泵下锥体?内出料管端附近局部继续呈急剧流态化，飞灰一边被流态化，?灰气均匀混合，边均匀进入输灰管道实现飞灰的远距离输送。此时仓泵内压力保持稳定。

　　The discharge valve is in the open state, and the ash gas mixture enters the ash conveying pipeline while compressing the air? Gas enters the bin pump through the fluidized bed. The lower cone of the warehouse pump? The area near the inner discharge pipe end continues to exhibit rapid fluidization, while the fly ash is fluidized on one side,? The ash gas is evenly mixed and enters the ash conveying pipeline uniformly to achieve long-distance transportation of fly ash. At this time, the pressure inside the warehouse pump remains stable.

　　肠.吹扫阶段

　　c. Blowing stage

　　此时仓泵内已无飞灰，管道内飞灰逐步减少，最后呈纯空气流动状态。系统阻力下降，仓泵内压力也下降至稳定值。吹扫的目的是吹尽管路和泵体内残留的飞灰，以利于下一循环的输送。

　　At this point, there is no fly ash in the warehouse pump, and the fly ash in the pipeline gradually decreases, finally reaching a pure air flow state. The system resistance decreases, and the pressure inside the bin pump also drops to a stable value. The purpose of purging is to blow away the residual fly ash in the pipeline and pump body, in order to facilitate the transportation of the next cycle.

　　诲.管道流态

　　d. Flow state of pipeline

　　从管道流态上看，本系统采用了正压浓相流态技术。管道前端呈旁路浓相流态，管道后端由于压?气体膨胀，?速度提高而转变为连续浓相流态。

　　From the perspective of pipeline flow state, this system adopts positive pressure dense phase flow technology. The front end of the pipeline is in a bypass dense phase flow state, while the back end of the pipeline is affected by pressure? Gas expansion, right,? As the speed increases, it transforms into a continuous dense phase flow state.

　　别.旁路浓相流态

　　e. Bypass dense phase flow state

　　旁路浓相流态输送浓度高[灰气比可达30- 60Kg/Kg]，同时速度低[根据输送物料，在5~10m/s之间]。

　　The bypass dense phase flow transport has high concentration [ash to gas ratio can reach 30-60Kg/Kg], while the speed is low [between 5-10m/s depending on the transported material].

　　在水平管道内，由于流速较低，飞灰在重力作用下沉降管底?，造成上部流道缩小，上部流道内气流速度增加，又带动飞灰重新飞扬，如此反复，同时下部沉降飞灰在压力作用下呈滑移状态，故是一种动压和静压同时作用的流态。此流态具有输送效率高、耗气量少、流动速度低、对管道磨损小等优点。

　　In a horizontal pipeline, due to the low flow velocity, fly ash settles at the bottom of the pipe under the action of gravity? This causes the upper flow channel to shrink, the airflow velocity inside the upper flow channel to increase, and drives the fly ash to fly again, repeating this process. At the same time, the lower settling fly ash is in a sliding state under pressure, resulting in a flow state where both dynamic and static pressure act simultaneously. This flow state has the advantages of high transport efficiency, low gas consumption, low flow velocity, and minimal wear on pipelines.

　　蹿.连续浓相流态

　　f. Continuous dense phase flow state

　　输送管道后端由于压力减小，气体膨胀，导致流动速度提高，流态也转变为连续浓相。连续浓相流态输送浓度高，同时速度也较大，为此可采用逐段扩径以减小磨损。

　　Due to the decrease in pressure and gas expansion at the rear end of the conveying pipeline, the flow velocity increases and the flow state changes to a continuous dense phase. Continuous dense phase flow conveying has high concentration and high speed, so it is possible to use step-by-step diameter expansion to reduce wear.

　　如图所示，由于管道内流动的压缩空气减压膨胀，输送速度提高，飞灰基本均匀悬浮在管道截面上，在气流的动压带动下稳定流动。

　　As shown in the figure, due to the decompression and expansion of the compressed air flowing inside the pipeline, the conveying speed is increased, and the fly ash is basically uniformly suspended on the cross-section of the pipeline, and flows steadily under the dynamic pressure of the airflow.

　　二、蜜臀国产在线观看性能分析及特点

　　2、 Performance analysis and characteristics of pneumatic conveying system

　　浓相正压气力输灰系统是结合流态化和管道二相流技术研制的，采用动压与静压联合输送方式的高浓度、高效率飞灰输送设备。系统整体性能指标大大超过常规的稀相输送系统，是目前世界上先进的气力输送技术。其系统性能和特点具体说有以下几个方面。

　　The dense phase positive pressure pneumatic ash conveying system is a high concentration and high-efficiency fly ash conveying equipment developed by combining fluidization and two-phase flow technology in pipelines, using a combination of dynamic and static pressure conveying methods. The overall performance indicators of the system greatly exceed those of conventional dilute phase conveying systems, and it is currently the world's advanced pneumatic conveying technology. Specifically, its system performance and characteristics include the following aspects.

　　1.较高的灰气比

　　1. Higher ash to gas ratio

　　灰气比可达30?~ 60Kg/Kg,而常规稀相系统为5 ~ 15Kg/Kg。因此其空气耗量大为减小，在大多数情况下，浓相正压气力输灰系统的空气消耗量约为其它系统的1/3 ~ 1/2。由此带来一系列有利的因素:

　　Can the ash to gas ratio reach 30? ~ 60Kg/Kg, And the conventional dilute phase system is 5-15Kg/Kg. Therefore, its air consumption is greatly reduced. In most cases, the air consumption of the dense phase positive pressure pneumatic ash conveying system is about 1/3 to 1/2 of that of other systems. This brings a series of favorable factors:

　　补.供气不必使用大型空气压缩机，因而可采用性能可靠的小型螺杆式空压机。供气系统投资较低，为使系统更加可靠稳定，在压缩空气站增加套压缩空气干燥过滤系统在经济上也是允许的。

　　a. Gas supply does not require the use of large air compressors, therefore reliable small screw air compressors can be used. The investment in the gas supply system is relatively low. In order to make the system more reliable and stable, it is economically feasible to add a compressed air drying and filtering system to the compressed air station.

　　产.输灰系统输送入贮灰库的气量较小，因而贮灰库上的布袋过滤器排负荷大大降低，从而有利于布袋过滤器的长期可靠运行。通常由于贮灰库所需过滤的空气量大，而贮灰库页部的空间较小，往往造成在高比负荷下运行的布袋过早损坏。而本系统较好地解决了这一难题。

　　b. The amount of air transported by the ash conveying system into the ash storage bin is relatively small, so the discharge load of the bag filter on the ash storage bin is greatly reduced, which is conducive to the long-term reliable operation of the bag filter. Usually, due to the large amount of air that needs to be filtered in the ash storage bin and the small space in the ash storage bin, it often leads to premature damage of the bag operated under high specific load. And this system has effectively solved this problem.

　　c.在通过提高浓度满足出力的前提下，所用管道口径大为减小，常用DN65、DN80、DN100、 DN125等小口径管道而稀相系统管道口径一般在DN125 DN250之间。由于管道口径减小，因而管道自重和冲击力较小，可选用轻型支架或利用现有厂房建筑敷设安装，十分方便，且投资要比常规稀相系统低得多。

　　c. Under the premise of increasing the concentration to meet the output, the diameter of the pipeline used is greatly reduced. Small diameter pipelines such as DN65, DN80, DN100, DN125 are commonly used, while the diameter of pipelines in dilute phase systems is generally between DN125 and DN250. Due to the reduced diameter of the pipeline, its own weight and impact force are relatively small. Lightweight supports or existing factory buildings can be used for installation, which is very convenient and requires much lower investment than conventional dilute phase systems.

　　2.较低的输送流速

　　2. Lower conveying flow rate

　　在通过提高浓度满足出力的前提下，尽可能降低输送流速以减少磨损。本系统平均流速在8 ~ 12m/s,而起始段流速为5~8m/s, 为常规稀相系统的一半左右，因此输灰管道磨损大为减少。管道?磨损小，就可不用昂贵的耐磨管而采用普通无缝钢管即可，?只在弯头部位采用耐磨材料或增加壁厚。

　　On the premise of increasing the concentration to meet the output, try to reduce the conveying flow rate as much as possible to minimize wear. The average flow velocity of this system is 8~12m/s, while the initial flow velocity is 5~8m/s, which is about half of the conventional dilute phase system. Therefore, the wear of the ash conveying pipeline is greatly reduced. The Conduit? If the wear is small, ordinary seamless steel pipes can be used instead of expensive wear-resistant pipes,? Only use wear-resistant materials or increase wall thickness in the elbow area.

　　3.较高的工作压力

　　3. Higher work pressure

　　系统工作压力较高，一般为2~4Kg/cm2, 对设备密封性要求较严。但可充分利用常规空压机提供的压头。且由于其流量大为减小，故足以抵消压力增高所增加的费用。

　　The working pressure of the system is relatively high, generally ranging from 2 to 4Kg/cm2, and there are strict requirements for equipment sealing. But it can fully utilize the pressure head provided by conventional air compressors. And due to its significantly reduced flow rate, it is sufficient to offset the increased cost caused by increased pressure.

　　4较好工作适应范围

　　4. Good job adaptability range

　　输送距离范围宽广，从短距离的50米至1500米长距离，?本系统都有其良好的输送记录。对于更长距离的输送，可采用中间站接力的方式解决，如一级输送采用小型仓泵把飞灰集中至中间转运灰库，二级输送用大型仓泵远距离输送至终端主灰库。

　　The conveying distance range is wide, from short distances of 50 meters to long distances of 1500 meters,? This system has a good delivery record. For longer distance transportation, intermediate station relay can be used to solve the problem. For example, small bin pumps are used for primary transportation to concentrate fly ash in the intermediate transfer ash silo, while large bin pumps are used for secondary transportation to transport it over long distances to the terminal main ash silo.

　　5.与除尘器的协调性

　　5. Coordination with dust collectors

　　仓泵与除尘器灰斗直接连通，正常工作情况下，灰斗内仅仅在相应仓泵处于输送状态时才有少量积灰，因而灰斗般可不设加热和气化设备，并大大有利于除尘器的运行。

　　The bin pump is directly connected to the ash hopper of the dust collector. Under normal working conditions, there is only a small amount of ash accumulation in the ash hopper when the corresponding bin pump is in the conveying state. Therefore, the ash hopper generally does not need heating and gasification equipment, which greatly facilitates the operation of the dust collector.

　　5.安装维修方便

　　5. Easy installation and maintenance

　　由于仓泵体积小重量轻，故安装方便，维修也容易。常用仓泵规格为0.25 ~ 2.5m3,重量在250~1500Kg之间，可直接吊挂在灰斗下。

　　Due to its small size and light weight, the warehouse pump is easy to install and maintain. The commonly used bin pump specifications are 0.25~2.5m3, with a weight between 250~1500Kg, and can be directly hung under the ash hopper.

　　7.配置灵活

　　7. Flexible configuration

　　本系统配置灵活方便，可根据出力需要灵活配置仓泵规格、输灰管道连接方式，以适应实际工况要求。

　　This system is flexible and convenient to configure, and can flexibly configure the specifications of the bin pump and the connection method of the ash conveying pipeline according to the output needs to adapt to the actual working conditions.

　　8.可靠性和可维修性

　　8. Reliability and maintainability

　　本系统在设计过程中即考虑了系统设备的可靠性和可维修性要求。主要体现在以下几个方面:

　　The reliability and maintainability requirements of the system equipment were taken into consideration during the design process. Mainly reflected in the following aspects:

　　9.系统具备的故障备用方式优越，可大大提高系统级可靠性和可维修性。如电除尘器一旦某一?电场下仓泵故障，即可停止此电场仓泵的输送，而不影响其它电场仓泵工作，这对维修是有利的。对于本系统内的主要动作部件，如电磁阀、气缸，由于控制用气经过彻底的净化处理，因而具有很高的可靠性。对于本系统内工作工况恶劣的关键部件，如进料阀和出料阀等，针对高冲蚀性灰气?相流工况进行设计和制造，以满足其工?况适应性和长期使用可靠性能要求，并考虑可维修性要求。对于本系统内工作工况恶劣的关键部件，如进料阀和出料阀等，针对高冲蚀性灰气混合二相流工况进行设计和制造，以满足其工况适应性和长期使用可靠性能要求，并考虑可维修性要求。

　　9. The system has superior fault backup methods, which can greatly improve system level reliability and maintainability. What if an electrostatic precipitator is used? If there is a malfunction in the electric field bin pump, the delivery of this electric field bin pump can be stopped without affecting the operation of other electric field bin pumps, which is beneficial for maintenance. For the main operating components within this system, such as solenoid valves and cylinders, due to thorough purification treatment of the control air, they have high reliability. For critical components with harsh working conditions within this system, such as feed valves and discharge valves, what is the solution for high erosive ash gas? Design and manufacture phase flow conditions to meet their requirements? Adaptability and long-term reliability performance requirements, while considering maintainability requirements. For critical components in this system that work under harsh conditions, such as feed valves and discharge valves, design and manufacture for high erosion ash gas mixed two-phase flow conditions to meet their adaptability and long-term reliability requirements, while considering maintainability requirements.

　　系统的大量配套件，如阀门、?气缸、仪器仪表等都尽量采用标准元件，互换性强，维修费用低且更换方便。

　　A large number of system accessories, such as valves? Cylinders, instruments, etc. should use standard components as much as possible, with strong interchangeability, low maintenance costs, and easy replacement.

　　自动运行水平

　　Automatic operation level

　　叁、蜜臀国产在线观看自动化程度高，操作简单。

　　3、 The pneumatic conveying system has a high degree of automation and is easy to operate.

　　系统动态显示、故障报警和处理功能齐全。在必要的时间，既可与除尘器控制中心联系构成一集控中心，同时又可在本系统局部范围内摆如对某一仓泵闭实现手动操作，因此操作管理都非常灵活方便。

　　The system has complete functions of dynamic display, fault alarm, and handling. At the necessary time, it can be connected to the dust collector control center to form a centralized control center, and at the same time, manual operation can be achieved within the local scope of the system [such as for a certain bin pump], so the operation management is very flexible and convenient.

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