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气力输送的自动控制系统

Automatic control system for pneumatic conveying

One of the advantages of pneumatic conveying is that it can easily achieve automatic control. It mainly includes the detection and control of the gas supply system, the opening and closing of various valves of the bin pump (or feeder), and the signal display of various actions, pressure detection in the conveying pipe, automatic opening and closing of the booster, display of switching signals of the fork (reversing valve), selection of unloading points, control of the unloading exhaust and dust removal system, control and display of the loading and unloading levels of the silo, and cumulative control of the conveying volume

气力输送系统的保养和维护

Maintenance and upkeep of pneumatic conveying system

The smooth application of pneumatic conveying devices in production depends not only on design, manufacturing, installation, and operation, but also on daily maintenance and upkeep. Especially for pneumatic conveying devices that operate in a sealed state, many hidden faults are difficult to detect, which highlights the importance of timely maintenance and upkeep. Pneumatic conveying devices can generally be divided into: gas source machinery, air ducts, feeders, conveying pipes, forks, separators, unloaders, dust pipes, dust collectors

如何减轻气力输送直管磨损

How to reduce the wear of pneumatic conveying straight pipes

In pneumatic conveying, especially when conveying materials with high grinding properties, pipeline wear is particularly important. Once the pipeline is severely worn, it may lead to powder running, low conveying efficiency, and even pipe blockage. Therefore, how to reduce pipeline wear has become an important research object for major manufacturers. Through multiple experiments, Shandong Juheng Environmental Protection Equipment Co., Ltd. has taken the following measures to reduce pipeline wear: measures to reduce straight pipe wear and improve service life: 1) try to reduce the speed of conveying airflow as much as possible. Yes

气力输送中弯头如何提高使用寿命

How to improve the service life of elbows in pneumatic conveying

Wear and tear occur in pneumatic conveying devices, where materials (or objects) move relative to the conveying pipe. Therefore, wear and tear of the conveying pipe is almost impossible to completely prevent. In actual production, various measures are often taken to find the best conveying method to reduce wear and tear. As for the conveying method, the wear of the conveying pipe in pressure pneumatic conveying is relatively light, one of the reasons being that the conveying airflow velocity is relatively small, about 10m/s; Secondly, the mixing ratio is relatively high. Compared to suction pneumatic conveying, powder

气力输送管道堵塞的解决方式

Solution to blockage of pneumatic conveying pipelines

Once a pneumatic conveying pipeline is blocked, the first step is to determine the location of the blockage, whether it is a full line or a partial blockage. Usually, a small hammer is used to tap the pipeline, and the blockage can be detected through sound. Then, effective measures can be taken to eliminate the fault based on the blockage situation. The methods include: 1) If there is a slight blockage in the local area, the pressure of the sending tank can be increased to put the entire system under high pressure, and then a hammer can be used to tap the blocked area to loosen the material, which can be removed without dismantling

气力输送如何防止堵塞

How to prevent blockage in pneumatic conveying

Pipe blockage is a difficult point in pneumatic conveying. To avoid pipe blockage, through the research of Juheng, the following aspects have been summarized. 1) When designing force transmission, it is necessary to determine the force structure based on the actual conditions such as material performance, productivity, and transmission distance, and reasonably determine the various process parameters of the device according to the above conditions. 2) When arranging the conveying pipes, the characteristics of pneumatic conveying should be fully considered, and the number of bends should be minimized as much as possible. The installation of the road should be straight, without misalignment or air leakage. The entire pneumatic system

气力输送管道堵塞的原因

Reasons for blockage of pneumatic conveying pipelines

In certain specific situations, pneumatic conveying systems may also experience blockage due to poor material movement. With changes in material properties, pipeline conditions, mechanical operation of gas sources, and even weather conditions, material blockages may occur, especially when working in a sealed environment. These changes are often difficult to detect and prevent blockages in advance, resulting in sudden blockages that catch people off guard and have a significant impact on production. Block

气力输送的操作要点

Key operating points of pneumatic conveying

Due to the wide variety of pneumatic conveying devices with different principles and operational requirements, it is difficult to explain them in detail in this article. Please refer to the user manual of Shandong Juheng Environmental Protection Equipment Co., Ltd. The following is only a brief introduction to the common parts. 1. The operation points of the pneumatic conveying device include the start stop, operation supervision, lubrication, and other operations of the pneumatic machinery, all of which are carried out using the instruction manual. The general operating points of the pressure feeding pneumatic conveying device itself are as follows: when handling materials

气力输送系统的安装和调试

Installation and commissioning of pneumatic conveying system

Pneumatic conveying equipment is usually a conveying system composed of multiple machines and components, so the installation workload is relatively large and the installation process is also complex, involving lifting, fitter, pipeline, electrical and other occupations. The quality of installation often determines whether the entire device can be used normally, so it should be given sufficient attention. For large-scale pneumatic conveying devices, specialized pneumatic machinery is often installed simultaneously. 1. The installation points of the pressure feeding pneumatic conveying device are as follows: First

脉冲除尘器的结构

Structure of pulse dust collector

The structural form of pulse dust collector bag filter is generally composed of filter elements - filter bag, cleaning mechanism, ash discharge mechanism, box and other departments. 1) Filter bag is an important component of bag filter. The filter bag consists of two parts: filter material and frame. The properties of filter media have a significant impact on the performance of bag filters. A high-performance filter material should not only have high filtration efficiency, large dust holding capacity, good breathability, and low filtration resistance, but also be resistant to wear, corrosion, high temperature, and other factors

气力输送噪音解决方法

Solution to noise in pneumatic conveying

To address the radiation noise from the intake and exhaust ports, the external radiation noise from the fan casing, and the spatial radiation noise from the foundation vibration, the following methods can be used to solve these problems. 1) Install silencers for inlet and outlet noise. The simplest and most effective way to control the radiated noise from the inlet and outlet of a fan is to install mufflers at the inlet and outlet of the fan. The so-called muffler is a noise control device that can prevent sound propagation and allow airflow to pass through

气力输送如何降噪

How to reduce noise in pneumatic conveying

The significance and control methods of reducing noise. Pneumatic conveying devices come in various forms, and the conveying capacity and purpose require the use of different forms, capacities, and pressures of aerodynamic machinery. Such as Roots blower, centrifugal fan, reciprocating compressor, etc. These aerodynamic machinery generate strong noise during operation, which is the main source of noise in pneumatic conveying systems. The peak noise can reach 100-125dB, seriously polluting the surrounding environment and endangering the health of workers. Because

气力输送袋式除尘器的工作原理

Working principle of pneumatic conveying bag filter

Bag filter is an efficient purification device that uses filter bags made of organic or inorganic fiber fabrics to filter out dust from the airflow. Used to capture non sticky, non fibrous industrial dust and volatiles. The capture of dust particles can reach 0.1pm, and the efficiency is generally stable at over 99%, but it is not suitable for filtering dust containing oil mist, condensed water, and viscosity. It has a large volume, high equipment investment and maintenance costs, and a complex control system. 1. Working principle: Currently, bag type

影响旋转供料器的工作性能因素有哪些

What are the factors that affect the working performance of the rotary feeder

The factors that generally affect the working performance of a rotary feeder include air leakage, number of blades, feed inlet width, rotational speed, material characteristics, blade shape, etc. Let's take a look at the factors that affect the working performance of a rotary feeder. (1) Leakage: Due to the pressure difference between the feed side and discharge side of the rotary feeder, the upward high-pressure airflow brought in by the gap leakage and impeller compartment will hinder the smooth entry of material particles into the rotary feeder compartment, resulting in

气力输送的卸料器装置

Unloader device for pneumatic conveying

In pneumatic conveying devices, unloaders (dust collectors) are often used to discharge materials and dust, and to prevent external air from entering the pneumatic conveying system during the discharge process. At present, there are several types of unloaders (ash unloaders), including impeller type and valve type. 1、 Blade type unloader 1. Basic characteristics: Blade type unloader is the most commonly used discharge equipment in pneumatic conveying systems, and it is used as a feeder in medium and low-pressure pressure feeding systems. In the process of powder technology, its application is very wide

除尘器的类型及其选择

Types and selection of dust collectors

Special dust removal equipment is often installed after the material separator of the pneumatic conveying system to remove dust from the airflow, reduce environmental pollution, protect the gas source machinery, and recycle some economically valuable powders. There are many types of dust collectors. According to its principle of action; It can be divided into several types, such as gravity type, inertia type, centrifugal type, bag filter type, electrostatic type, cleaning type, sonic type, etc. From the perspective of dust removal methods, it can be divided into two categories: dry and wet. The sonic dust collector is currently in use

推压式仓泵的工作原理和结构

Working principle and structure of push type bin pump

The operating principle of the push type bin pump in Figure 1 is as follows: after the material is loaded into the bin pump, compressed air enters in three ways: one way enters from the top of the bin pump, quickly creating pressure at the top to push the material downwards; Inject the material from the larger nozzle that is tangent to the cone and inner wall of the warehouse pump, causing the material to rotate and loosen; There is a spray mixing chamber at the lower part of the warehouse pump, and air is sprayed from the main pipeline directly towards the material conveying pipe to push and transport the material. The above three air sources are mainly from the third air source, which has a large intake volume

气力输送物料的输送速度

The conveying speed of pneumatic conveying materials

The movement speed of the transported material: In pneumatic conveying, the movement speed of the transported material particles is slower than the airflow speed, and there is a speed difference between the two. The aerodynamic force that drives particle movement is the resistance generated by the velocity difference of the airflow passing around the particles. In other words, the energy that causes particle movement is transferred from the airflow to the particles through the velocity difference. Therefore, the velocity of material particles in the conveying pipe is the basis for calculating the pressure loss of two-phase flow. Due to the complexity of two-phase flow testing technology

气力输送气流速度的影响

The influence of airflow velocity in pneumatic conveying

Pneumatic conveying airflow velocity: When designing a suction type pneumatic conveying system, it is extremely important to correctly determine the reasonable conveying airflow velocity for different materials, which is related to the reliability and economy of the device's operation. This is also the key to determining the performance of the conveying device. Usually, each material has an optimal air velocity that can ensure the particle group is in a suspended state for normal transportation, which is called the safe transportation air velocity or economic velocity. If the selected conveying speed is higher than

气力输送系统的计算方式

Calculation method of pneumatic conveying system

When designing calculations, the first step is to meet the required conveying performance. In addition, the production task and future planning shall be carefully considered. The selected equipment shall be progressiveness in performance, and the convenience of use and maintenance as well as the advantages of pneumatic conveying shall be fully considered. Therefore, the calculation shall be first estimated and continuously adjusted, and then corrected to make the calculation result close to reality. The calculation of pressure pneumatic conveying mainly includes the following main parameters:

气力输送设计程序

Pneumatic conveying design program

After mastering the important parameters of designing pneumatic conveying, the design scheme and main technical parameters of positive pressure pneumatic conveying are determined based on comprehensive analysis. 1) The form and system composition of transportation. 2) The main structural formula and material selection of the device. 3) The determination of the main technical parameters of the conveying device: airflow velocity, design conveying capacity, mixing ratio, air volume for conveying, and calculation of resistance loss, in order to determine the pressure and capacity of the air source machinery and the power of the electric motor. 4) Determine the interior of the feeding pipe