The present invention relates to a pneumatic air booster, and provides a pneumatic air booster, which: can minimize the amount of air supplied to a pipeline, through which objects move, of high-density transfer equipment for transferring heavy objects with high specific gravity such as sand and limestone in a blower, a compressor or the like; enables smooth transfer of the objects in the pipeline and reduces even the impact to the pipeline so as to be advantageous in maintenance and repair of equipment; and is independently operated when the air booster is applied to a pneumatic conveying system, so as to enable pressure adjustment of the pipeline, so that a monitoring and control system is simplified, and thus costs for constructing the system can be reduced.

A conveying system for pneumatically conveying plastic granulate comprises a feed location, at which the plastic granulate is fed into a conveying line by pressurized conveying gas, a target location, in conveying connection with the feed location, for moisture contained in the conveying gas, and a condensation tempering unit, which is arranged along a section or sections of the conveying line, for making the conveying line such temperature to at least partial condensation of moisture contained in the conveying gas to form a sliding film on an internal wall of the conveying line.

A conveying system for pneumatically conveying plastic granulate comprises a feed location, at which the plastic granulate is fed into a conveying line by pressurized conveying gas, a target location, in conveying connection with the feed location, for moisture contained in the conveying gas, and a condensation tempering unit, which is arranged along a section or sections of the conveying line, for making the conveying line such temperature to at least partial condensation of moisture contained in the conveying gas to form a sliding film on an internal wall of the conveying line.

The present invention provides a method of airflow transportation of methionine that can minimize the crushing of methionine, which is characterized in that when methionine is transported as airflow using carrier gas, the flow state of methionine is a low concentration floating flow type, and the mixing ratio of methionine and carrier gas is in the range of 4 to 10 kg-methionine/kg-carrier gas. In the method of airflow transportation of methionine of the present invention, if the D50 of methionine is in the range of 150 to 425 μm, the increase rate of the fine powder can be suppressed to 1.5% or less by maintaining the mixing ratio at 4 to 10 kg-methionine/kg-carrier gas, and can be suppressed to 1% or less by maintaining the mixing ratio at 5 to 10 kg-methionine/kg-carrier gas.

Methods and apparatuses for conveying particulate material are described. A particulate material conveying apparatus may comprise a slide duct having a slide duct axis. The slide duct may comprise an interior region, and the interior region may have a top third interior region, a middle third interior region, and a bottom third interior region. The top third interior region is disposed above the middle third interior region and the middle third interior region is disposed above the bottom third interior region. The duct further defines an opening. An air movement mechanism may be connected to the duct an configured to move air through the opening into the slide duct in a direction of the slide duct axis such that a greater amount of air exits through the bottom third interior region than either of the top third interior region or the middle third interior region.

The present invention provides a method of airflow transportation of methionine that can minimize the crushing of methionine, which is characterized in that when methionine is transported as airflow using carrier gas, the flow state of methionine is a low concentration floating flow type, and the mixing ratio of methionine and carrier gas is in the range of 4 to 10 kg-methionine/kg-carrier gas. In the method of airflow transportation of methionine of the present invention, if the D50 of methionine is in the range of 150 to 425 m, the increase rate of the fine powder can be suppressed to 1.5% or less by maintaining the mixing ratio at 4 to 10 kg-methionine/kg-carrier gas, and can be suppressed to 1% or less by maintaining the mixing ratio at 5 to 10 kg-methionine/kg-carrier gas.

Methods and apparatuses for conveying particulate material are described. A particulate material conveying apparatus may comprise a slide duct having a slide duct axis. The slide duct may comprise an interior region, and the interior region may have a top third interior region, a middle third interior region, and a bottom third interior region. The top third interior region is disposed above the middle third interior region and the middle third interior region is disposed above the bottom third interior region. The duct further defines an opening. An air movement mechanism may be connected to the duct an configured to move air through the opening into the slide duct in a direction of the slide duct axis such that a greater amount of air exits through the bottom third interior region than either of the top third interior region or the middle third interior region.

A pneumatic air booster (100) includes; a shaft (160); a body (110, 111) including a first body (110) and a second body (111); an air inlet (112); an air outlet (113); a pressure chamber (114) communicating the air inlet (112); an air control passage (115) communicating the pressure chamber (114); a pressure control chamber (116); a bonnet (190); a valve (140); a valve spring (150); a valve seat (170); and a connection passage (102a) extended between the air outlet (113) and the pressure control chamber (116).

Proposed are a device and a method for recovering and re-injecting excess powder, in which the device includes one or more powder transfer lines transferring powder, a loading chamber loading the powder transferred through a first connecting pipe connected to the powder transfer lines, a storage hopper storing the loaded powder transferred by opening an opening/closing valve disposed at a lower end of the loading chamber, a powder weigher disposed on each side or one side of the loading chamber or the storage hopper, a rotary valve connected to a lower end of the storage hopper and normally discharging the powder stored in the storage hopper, a micro-rotary valve disposed at the storage hopper and recovering the powder exceeding a target supply amount, a recovery chamber connected to the micro-rotary valve and storing the recovered powder, and a controller controlling the rotary valve and the micro-rotary valve.

A pneumatic conveying device for conveying granular material, in particular seeds and/or fertilizer, includes at least one blower with at least one outlet, to which the at least one main air supply line is connected, into which flows an air flow generated by the blower. The at least one main air supply line leads into an air inlet of an air distribution device for controlling the volumetric air flow. The air distribution device has an even number of air outlets, to which the respective one connecting line is connected, to which a metering device for supplying the granular material is connected. The air distribution device is embodied as a cylindrical housing with a rotary slide valve arranged therein, which is equipped for changing an outlet cross-section of the air outlets in order to manipulate the supplied volumetric air flow for transporting the granular material coming from the respective metering device.