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行業(yè)新聞

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氣力輸送技術(shù)在冶金行業(yè)的應(yīng)用

Application of Pneumatic Conveying Technology in Metallurgical Industry

The metallurgical industry, including blast furnace ironmaking, open hearth furnace, converter, and electric furnace steelmaking, involves the transportation of a large amount of granular materials and meets certain process requirements during the transportation process. For example, the transportation and coal injection of blast furnace pulverized coal, the discharge of smoke and slag in the blast furnace furnace, the transportation of lining materials such as dolomite powder, the transportation and carbon injection of carbon materials in the electric furnace foam slag submerged arc technology, the pneumatic sample delivery of samples in front of the furnace and the central laboratory, the injection system of cupola scrap iron, and the use of sending tanks to transport desulfurizer

氣力輸送技術(shù)糧食行業(yè)的應(yīng)用

Application of pneumatic conveying technology in the grain industry

In the mid-20th century, the Swiss company BuHLER began designing pneumatic conveying systems for flour mills. In 1995, China introduced pneumatic conveying from abroad to transport barley, corn, etc. In 1958, Jinhua Flour Mill in Zhejiang Province built China's first pneumatic conveying system for flour processing, which was subsequently promoted and applied nationwide. Due to the fact that pneumatic conveying is beneficial for grain processing technology while completing material conveying, it can increase yield, reduce grain mold and insect infestation, improve workshop hygiene environment, save maintenance costs, and ensure

港口氣力輸送卸料機(jī)

Port pneumatic conveying unloader

Pneumatic unloaders are currently commonly used for unloading bulk grain from ships, commonly known as non suction grain machines. There are many small and medium-sized inland ports in China, and floating grain suction machines can be used according to the conditions of the terminal, water level, ship type, etc. The following figure shows the floating grain suction machine system of Changsha Port. This machine takes advantage of the favorable conditions of the storage ship by placing the pneumatic grain suction machine on the storage ship, which reduces investment costs, is easy to operate, and has little impact on the water level. The following figure shows the XL400 pneumatic grain suction system at Huangpu Port

碼頭散裝水泥氣力卸料機(jī)

Terminal bulk cement pneumatic unloader

With the development of the market economy, the unloading task of bulk materials at Jianghu Wharf is very busy. There is a great demand for pneumatic unloaders for bulk cement for 1000t ships in the Pearl River Delta of Guangdong Province. The pneumatic unloader for difficult to transport materials such as ore and coal needs to be developed and researched. Yueyang Port Bulk Cement Pneumatic Unloader System. It is suitable for unloading about 1000 bulk cement ships in Rivers and Lakes. The system consists of two parts. One is to transport cement from bulk carriers to the cement intermediate tower, using

氣力輸送系統(tǒng)港口的優(yōu)勢

Advantages of pneumatic conveying system in ports

In 1958, Guochang Port and Shanghai Port successively adopted pneumatic grain unloaders. After the 1970s, Guangzhou Huangpu Port, Heilongjiang Jiamusi Port, Guangdong Shiqi Port and other ports also successively built pneumatic grain unloaders. Pneumatic conveying is widely used for unloading bulk materials from ships in ports, such as grains, fly ash, cement, ore powder, salt, fertilizers, etc. It can improve the unloading speed and shorten the berthing time of ships in the port. Pneumatic unloaders are generally negative pressure suction type, negative positive pressure composite type, negative

炭黑氣力輸送系統(tǒng)

Carbon black pneumatic conveying system

Shandong Juheng Environmental Protection Equipment Co., Ltd. adopts advanced German technology to use double tube pneumatic conveying to transport carbon black to a relatively ideal state. Its characteristics are low airflow velocity, average velocity not exceeding 7.5m/s, high mixture concentration of feed and gas, and low pipeline blockage. It can be restarted in case of shutdown and is suitable for transporting particle carbon black that is easy to rub and break and powder carbon black that is easy to adhere. The pneumatic conveying system mainly consists of a bin pump, a double pipe conveying pipe branching valve

聚氯乙烯粉氣力輸送

Pneumatic conveying of polyvinyl chloride powder

The particle size range of PVC powder is large, from fine powder to large particles, with a bulk density of 0.27-0.8v/m 3. The material's conveying performance also varies greatly. In addition, it is sensitive to heat and also has electrostatic effects. In the 1970s and 1980s, low-pressure dilute phase pneumatic conveying was commonly used for PVC powder, which had many drawbacks. With the development of pneumatic conveying, especially the application of dense phase pneumatic conveying, pulse air knife pneumatic conveying and high concentration phase fluidized bed pump conveying have been commonly used in the past decade. Like

化工物料氣力輸送的注意問題

Precautions for pneumatic conveying of chemical materials

Most of the raw materials, semi-finished products, and products in the chemical industry are powdery materials, viscous materials, hot materials, etc. With the automation of the production process, fully sealed pneumatic conveying is the most ideal material transportation equipment. For pneumatic conveying of chemical raw materials, it is necessary to understand the physical and chemical properties of the conveyed material, the process equipment and equipment performance before and after pneumatic conveying, and the working conditions set by the factory in order to determine whether pneumatic conveying can be used, and then

電廠噴鈣脫硫、石灰石粉的氣力輸送

Pneumatic conveying of calcium desulfurization and limestone powder in power plants

China strictly controls the SOz emission standards in the atmosphere of power plants. Power plants with high sulfur content in coal require the use of desulfurization technology. There are currently two commonly used desulfurization methods: one is to use a circulating fluidized bed boiler, in which limestone powder is mixed and burned inside the boiler; The second is to set up a separate flue gas desulfurization system behind the flue. The former uses pneumatic conveying method to transport limestone powder, which contains calcium carbonate and calcium oxide. Limestone powder properties: bulk density of 1.2~1.5vm, resting angle of 30 °~

雙管紊流氣力輸灰輸送系統(tǒng)

Double tube turbulent pneumatic ash conveying system

With the widespread application of pneumatic ash conveying technology and the advancement of comprehensive utilization technology of fly ash, there is a demand for ultra long distance conveying of fly ash (greater than 1000m) in the power industry. Technical measures such as double casing special pipeline structure are adopted to achieve long-distance conveying. The process flow and equipment composition of this system are basically the same as those of conventional positive pressure pneumatic ash removal systems. The bin pump still uses an upward flow fluidized bin pump, but the difference is that the conveying pipeline adopts a special structure to maintain continuous conveying of air

正壓氣力除灰系統(tǒng)

Positive pressure pneumatic ash removal system

The positive pressure pneumatic ash removal system uses compressed air as the conveying medium to transport dry ash to ash silos or other designated locations. Due to its characteristics of long conveying distance, large conveying volume, and few system equipment, it is widely used in coal-fired power plants in China. Positive pressure pneumatic ash removal mainly consists of feeding, gas source, aggregate equipment, and pipeline control system. The types, performance, and layout of equipment used in different types of pneumatic ash removal systems vary, including centralized feeding and direct supply

負(fù)壓氣力除灰與分選一體化系統(tǒng)

Integrated system of negative pressure pneumatic ash removal and sorting

This system utilizes a vacuum pump and air ash separation (cyclone and bag filter) of a negative pressure pneumatic ash removal system combined with a volute air flow classification to integrate negative pressure conveying and sorting. As shown in the figure, the system consists of an electrostatic precipitator ash hopper, a pneumatic ash unloader, an air inlet valve, and ash pipeline switching. 4 sets of 220t/h boilers are equipped with 4 sets of three electric field electrostatic precipitators, totaling 24 ash hoppers. The vacuum conveying and sorting system can select any ash hopper from the 24 for ash collection. The electrostatic precipitators II and III electric field fine ash

粉料氣力輸送系統(tǒng)的設(shè)計

Design of Powder Pneumatic Conveying System

At present, the pneumatic conveying methods in the casting industry are divided into dilute phase and dense phase, suction conveying and pressure conveying. According to the characteristics and process requirements of the conveyed material, the pneumatic conveying type is selected. The following introduces the pneumatic conveying form for powdered materials. Due to the fact that coal powder and clay powder used in the casting industry are often bagged, pneumatic conveying of powdered materials is generally carried out manually. The materials are then loaded into the sending tank and sent to the hopper through a dumping machine, or directly pressed into the hopper by a bulk truck. Powder pneumatic conveying

氣力輸送的應(yīng)用行業(yè)

Application industry of pneumatic conveying

In recent years, with the development of production and the increasing automation of production processes, the requirements for energy conservation and environmental protection have become higher and higher. Pneumatic conveying technology has rapidly developed and applied based on its own technical characteristics. In the process of continuous exploration and innovation, the object of pneumatic conveying has rapidly expanded from early grains, flour, and letters to materials such as cement, sand, chemical raw materials, fly ash, coal powder, etc. Its application scope covers grain, ports, chemical industry, metallurgy, electricity, and more

倉泵的串聯(lián)自控型脈沖氣力輸送裝置

Series automatic control pulse pneumatic conveying device for warehouse pumps

A series continuous transmission self-control pulse pneumatic conveying device with a buffer chamber pump. Its action program: 1) There is no material in the buffer tank pump, the pressure is zero, the pressure gauge electrical contact is closed, and the pneumatic gate valve is activated to open the feeding bell cover valve and start feeding. 2) After the material is filled to the upper level, the gate valve closes and stops feeding. 3) After a delay of several seconds, the feeding bell cover valve and the release valve 7F are closed, and the intake valve is manually opened to start the intake of air into the buffer tank, and the electrical contact of the pressure gauge is disconnected. 4) The material inside the warehouse pump

氣力輸送的壓降影響分析

Analysis of the Impact of Pressure Drop in Pneumatic Conveying

There are many calculation methods for pipeline pressure loss in pneumatic systems, and some models treat it as a gas with variable temperature and speed flow. The calculation requires a large number of parameters, which is very cumbersome and difficult to calculate; Some models simplify it too much, although the calculation is very simple, the calculation results deviate greatly from reality and have no practical value. The calculation model of this article is: the transported gas flows in the pipeline, and its pressure and velocity are constantly changing. The temperature variation range of the transported gas

脈沖式氣力輸送操作程序

Pulse pneumatic conveying operation procedure

Pulse type pneumatic conveying devices require more automatic control systems or program control systems because the material and gas are transported in intervals. Once operated incorrectly, material blockage may occur and the conveying may stop. Secondly, when a large conveying volume is required and continuous conveying is adopted, an automatic control program system must be designed. If operated manually, it will inevitably make the operator too nervous and cause misoperation. The control method of pulse pneumatic conveying is basically similar to that of dynamic pressure conveying. Here, we will first introduce

氣力輸送的自動控制系統(tǒng)

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

氣力輸送系統(tǒng)的保養(yǎng)和維護(hù)

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

如何減輕氣力輸送直管磨損

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

氣力輸送中彎頭如何提高使用壽命

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

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