Introduce the pneumatic conveying system of Roots blower for ash removal

利用罗茨风机设计除灰系统，要确保能完成预期的输送任务，同时要合理确定所采用的设备类型和容量以及相关问题和设计。不仅要看设备费用的多少，更重要的是综合考虑材料性质对质量的影响、运输量、运输距离、运输路线状况以及运行管理的难易程度和费用等。例如，对于某些材料，各种设备条件都适合气力输送，但由于材料含水量高、粘性强等原因，无法通过罗茨风机进力输送，即使机械运输设备费用较高，也会选择机械运输方式。

When using Roots blower to design the ash handling system, first of all, it is necessary to ensure that the expected conveying task can be completed, and at the same time, it is necessary to reasonably determine the type and capacity of the equipment used, as well as the related problems and design. It depends not only on the equipment cost, but also on the influence of material properties on quality, transportation volume, transportation distance, transportation route, and the difficulty and cost of operation management. For example, for some materials, various equipment conditions are suitable for pneumatic conveying, but due to high water content, strong viscosity and other reasons, pneumatic conveying cannot be carried out through Roots blower. Even if the cost of mechanical transportation equipment is high, mechanical transportation will be selected.

罗茨鼓风机

Roots blower

由于这种情况，在输送某种物料时，例如向循环流化床锅炉炉前料仓输送石灰石粉时，采用罗茨风机气力输送所需的电力较大，乍一看运行成本较高，但从系统合理性和生产技术上看，还是以气力输送为宜.在什么情况下采用哪种方式的技术，应该遵循以下几个要求：经济性比较合理：一般来说，短距离运输时，机械运输有利。相反，对于长距离运输，从所需电力的角度来看，采用罗茨风机的气力输送系统是不利的，但在设备费用方面，采用气力输送系统往往是有利的。设备费用、所需电力和运行成本会根据周围的条件有很大的变化，因此无法一概而论。另外，请注意，根据各种平台支架和附属设备的情况，变化幅度也很大。总之，在设计罗茨风机气力除灰系统时，应根据工程具体条件，通过综合技术经济比较选择更好的输送系统和相应的设备。如果系统的输送出力和输送距离确定，系统的经济性一般取决于输送的灰气混合比

Because of this situation, when conveying certain materials, such as limestone powder to the bunker in front of the circulating fluidized bed boiler, the power required for pneumatic conveying by Roots blower is large. At first glance, the operation cost is high, but from the perspective of system rationality and production technology, pneumatic conveying is preferred Under what circumstances and in which way, the following requirements should be followed: reasonable economy: generally speaking, mechanical transportation is favorable for short distance transportation. On the contrary, for long-distance transportation, from the perspective of power demand, the pneumatic conveying system with Roots blower is unfavorable, but in terms of equipment cost, the pneumatic conveying system is often favorable. The equipment cost, required power and operation cost will vary greatly according to the surrounding conditions, so it cannot be generalized. In addition, please note that according to the situation of various platform supports and auxiliary equipment, the range of change is also large. In a word, when designing the pneumatic ash removal system of Roots blower, better conveying system and corresponding equipment should be selected according to the specific conditions of the project and through comprehensive technical and economic comparison. If the conveying output and distance of the system are determined, the economy of the system generally depends on the ash gas mixture ratio

从设备能耗来看：推(吸)气设备所需功率与系统压力和空气流量的乘积成正比。提高灰气体的混合比可以减少送气用的空气量。在送风速度保持不变的条件下，送风空气量与管径的平方成正比，即QD2，而系统压力，即送风管路阻力与管内径的平方成反比，即P1/D，但与灰气比不成正比增加。因此，提高送气用的灰气体比，减少空气量，降低压力设备的能量消耗是十分有利的。

From the perspective of equipment energy consumption, the power required by air pushing (suction) equipment is proportional to the product of system pressure and air flow. Increasing the mixing ratio of ash gas can reduce the amount of air used for air supply. Under the condition that the air supply speed remains unchanged, the air supply volume is proportional to the square of the pipe diameter, i.e. QD2, while the system pressure, i.e. the resistance of the air supply pipeline, is inversely proportional to the square of the pipe inner diameter, i.e. P1/D, but not proportional to the ash air ratio. Therefore, it is very beneficial to increase the ash gas ratio for air supply, reduce the air volume and reduce the energy consumption of pressure equipment.

从系统建设费用来看：由于灰气比的提高，设备和输送管路的内径、支架和安装费用相应减小，降低系统建设费用的效果也十分明显。显然，灰气比越大，越有利于加大输送能力，经济性也随之提高。但是，如果灰气比过大，相同的气流速度会导致堵塞，输送压力也会变高，负压式和低正压式气力输送系统可能会超过压力机械允许的进气压力或排气压力。因此，灰气比数值受材料物理性质、输运方式和输运条件等因素的限制。特别是正压罗茨风机的气力输送系统，考虑仓泵本身的尺寸和结构、进料管的内径和长度、弯头数量和用气量等条件，灰气比自然更受约束。

From the perspective of system construction cost: due to the increase of ash gas ratio, the inner diameter, support and installation cost of equipment and transmission pipeline are reduced accordingly, and the effect of reducing system construction cost is also very obvious. Obviously, the larger the ash gas ratio is, the more conducive to increasing the transmission capacity and improving the economy. However, if the ash gas ratio is too large, the same air flow speed will lead to blockage, and the delivery pressure will also become higher. Negative pressure and low positive pressure pneumatic conveying systems may exceed the allowable inlet pressure or exhaust pressure of the pressure machinery. Therefore, the value of ash gas ratio is limited by physical properties of materials, transportation methods and conditions. Especially for the pneumatic conveying system of the positive pressure Roots blower, considering the size and structure of the bin pump itself, the inner diameter and length of the feed pipe, the number of elbows and air consumption, the ash gas is more constrained than nature.

以上就是为大家介绍的有关广西气力输送方案设计的详细的介绍,希望对您有所帮助.如果您有什么疑问的话,欢迎联系我们.我们将以的态度,为您提供服务http://www.sddyfd.com/

The above is a detailed introduction to the design of Guangxi pneumatic conveying scheme. I hope it will be helpful to you. If you have any questions, please contact us. We will provide you with professional services http://www.sddyfd.com/