Pneumatic Conveying Vacuum Conveyor Positive Negative Pressure

Product Details

1.Negative Pressure Conveying

1) Introduction

The negative pressure conveyor conveys the material through negative pressure. The conveying process adopts closed pipeline transportation, and there is no leakage of dust; the particle size of the conveyed material ranges from 0.2 microns to 1 mm, and we use imported filter materials. Ti07 type filter, the filtration ratio is 99.99%, no dust will leak into the environment through the filter. The noise of the system is less than 70 decibels during operation.

2) Working principle

The negative pressure conveyor forms a negative pressure airflow under the vacuum. Under the action of this airflow, the conveyed materials are instantly transported to another container through the suction hose or pipe . Since the material is always in a vacuum state during the conveying process, even if a pipeline leak occurs, the material will not leak into the surrounding environment.

Working procedure:

A. The Roots blower works to generate vacuum in the separation container of the vacuum conveying equipment. Inhale the material from the feed port through the suction hose and the suction port

B. Separate air and materials in the filter bin of the separation container, and collect the materials in the bin. Cyclone separators prevent fine powder from entering the filter to increase the efficiency of the filter.

C. When the silo is full of materials, the converter is automatically closed, and the pressure in the conveying equipment reaches a balance. The discharge valve is opened, and the material flows out through the discharge port and directly falls into the storage container.

D. The discharge compartment is closed, and the entire conveying process is started again.

3) Equipment components

The equipment is mainly composed of Roots blower, filter bin and filter, recoil air bag, separation bin, silo, pneumatically controlled feeding valve, pneumatically controlled vibrator, quick-open connection clamp, sealing ring (natural silicone rubber), The air control controller and the connection system are composed together.

4) Product features:

Simple: PLC automatic control;

Hygiene: Meet GMP standards and meet CIP requirements;

Clean: Dust-free operation, the conveying process will not cause pollution to the environment ; Economical: Low maintenance costs;

Main Parameter

2. Positive Pressure Conveying Equipment

1) Introduction:

material enters the conveying pipe from the sending tank, and the compressed gas is opened and closed at a certain frequency through the solenoid valve to form a pulsed air flow (air knife ) . The static pressure difference is used as the driving force to push the material forward. After reaching the separation device for material and gas separation, the material falls into the silo, and the gas is discharged into the atmosphere to realize transportation.

2) Features:

1. Low flow rate but large conveying capacity, almost no effect on material quality.

2. The system has higher pressure and lower air consumption.

3. The control system is automated, and the requirements for various electrical components are high.

4. Multi-point feeding and multi-point unloading.

5. The sending tank (also known as the silo pump) is a pressure vessel, which is a mandatory signing equipment.

6. The air source is generally a screw air compressor, and the post-processing equipment must be matched.

3) Parameters

1. Positive pressure dense phase dynamic pressure conveying, air speed: 8m/s ~ 15m/s, delivery capacity: ~ 50t/h , conveying distance: maximum 2000m, air source type: compressor

2. Positive pressure dense phase plug conveying, air speed: 1m/s ~ 8m/s , conveying capacity: ~ 50t/h , conveying distance: maximum 1000m, air source type: compressor

This system generally uses the Roots blower as the air source, the rotary feeder, the ejector, etc. as the feeding device, and the materials are transported through the feeding device.

The pipeline is mixed with high-speed pneumatic and transported to the end receiving bin, and the gas filtered by the material gas separation device is discharged into the atmosphere; suitable for short transport distances (300

Within meters), the material wear is small, and the project of multiple receiving bins.

Fundamental:

Positive pressure pneumatic conveying generally uses a Roots fan as the power source. The outlet of the fan passes through a cooler to reduce the gas temperature to an appropriate temperature. After further filtering the gas, it is mixed with the material in the mixing chamber. The material is suspended in the pipeline, and the material and gas are mixed. After entering the separation equipment, the material is separated and the gas is discharged.

Features:

1. The conveying distance is long, generally, the low-pressure dilute phase can be sent for 10-300m distance;

2. The energy consumption of the conveying power source is relatively low (compared to the negative pressure dilute phase);

3. Multi-point feeding and multi-point unloading;

4. With automatic control device, it is easy to realize automation;

5. Very reliable, less maintenance system;

6. Airtight and leak-free, energy saving, beautify the environment.

The nitrogen-protected vacuum conveyor is supplemented by a nitrogen-protected conveying process, and uses compressed air as the power source of the equipment to play a role in safety and explosion-proof. It is widely used in chemical enterprises.

In the pharmaceutical industry, some flammable and explosive materials are often transported. Due to the low ignition point of such materials, in the process of material transportation, there is a danger of explosion if a little carelessness occurs, which poses a great threat to the surrounding environment and personal safety. At this time, it is necessary to use vacuum conveying equipment with nitrogen protection device.

The nitrogen-protected vacuum conveyor is professionally designed for the special explosion-proof feeding requirements of chemical, pharmaceutical, food processing and other enterprises, and complies with GMP standards and CIP requirements.

The highly integrated structure can meet the frequent replacement of products, the equipment can be cleaned quickly, and the cross-contamination of products can be reduced. The excellent manufacturing quality and seamless structure meet the requirements of high quality.

Nitrogen protection type vacuum feeder, the whole system uses nitrogen as the protective gas, air as the power source, and nitrogen is only used as the transmission process of the protective gas. Features of nitrogen-protected vacuum conveyor: vacuum conveying equipment for explosion-proof areas,

◆ No flammable source

◆ Fully pneumatic operation, no power supply required

◆ Fully conductive design

◆ Small filling volume

◆ Low conveying speed

◆ No heat generation

◆ No rotating parts

◆ Easy control and operation

Working principle:

When the vacuum pump draws out air from the powder collecting tank, a strong negative pressure is generated in the tank, thereby forming a negative pressure airflow, and the powder material is sucked into the powder collecting tank together with the air through the powder suction pipe, and the filter in the powder collecting tank will Effectively prevent dust and fine particles from being drawn out with the air. During this process, the accumulator tank next to the powder collecting tank is filled with air under a certain pressure, and the air in the accumulator tank will be released in an instant pulse. The material on the filter element enables the filter element to maintain a normal filtering area without affecting the output. Continuously backflush each filter element individually to ensure good filtration effect. When the system starts to run, the unloader under the powder collecting tank starts to work, continuously dropping the powder materials . The body fell smoothly. Through the material level control of the material level meter, when the material in the powder collecting tank is too high, the material suction is automatically suspended, and when the material level drops, the material feeding is automatically started.

Features:

1. Replacing the inefficient manual powder conveying method, it can be directly used in the production process to reduce air pollution and waste of raw materials;

2. Patented airflow induction system to prevent sudden powder eruption;

3. The system is economical and simple to install and use - unlike the expensive traditional large and complex pre-installed powder conveying systems;

4. Lightweight: It can be easily used anywhere (site-to-site), and it can be used immediately without installation and debugging;

5. It can be widely used in a variety of dry powders, such as fumed silica, white carbon black, expanded mica and other non-mineral powders; acrylic resins, silicone resins and other organic powders; fine chemicals, pharmaceutical raw materials and intermediates production The industry and the conveyance of all lightweight powders are very versatile.