tory burch shoes Performance requirements identifi

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Performance requirements identified from the powder milling process

= F force sent to spray dry,[link widoczny dla zalogowanych], dry powder into water vapor, powder fell into the storage hopper; the other is the air system, fan sent to rely on hot air drying, and then along with the steam from the fan out. Asked to consider the stability of the two systems, under normal circumstances, to control the inlet temperature, outlet temperature, vacuum tower, the feed aperture, mud pressure (rotation speed, air speed). Because I use the Danish Nello Corporation S50 Pressure spray dryer, so use the following parameters to illustrate the control parameters, and other types of spray dryers can learn. 5.2.1 Imports of hot air inlet temperature of the heat source is drying mud, the level of the inlet temperature is inversely proportional to moisture content and powder, that is: the higher the inlet temperature, the lower the moisture content. However, if the inlet temperature higher than a certain value, the atomized droplets sharp = F dry, granular surface curing, the internal water should not be ruled out, resulting in stale powder, the particles expand thinner, measuring moisture decreased, the actual water content increased; command will also cause some bonding of ceramic science and if the beam Lei Li Rui Li i grapes _ * 22 * made with water vapor discharge, reduce green strength, the shrinkage of blanks. 5,2.2 inlet air flow rate of inlet air flow rate directly affects the performance of powder flow rate the faster the smaller vacuum tower, fine particles increased, d50 decreases; while the whereabouts of accelerating particles to promote increased water content of powder the contrary, the greater the velocity the lower the vacuum tower, fine particles are reduced, but the whereabouts of slow particles, powder moisture is low. So we need to open the inlet damper, with PLC control import fan speed, so the reasonable control of the inlet temperature and air flow rate of imports. 5.2.5 exit temperature will determine the powder outlet temperature of water, the high outlet temperature, moisture content, whereas the low moisture content, but the outlet temperature, vacuum tower, inlet temperature, feeding quantity is to contain each of the . In the feeding quantity to improve the stability of the outlet temperature, or increasing the inlet temperature, or increase the fan pumping power, increased waste of fuel inlet temperature on the one hand, on the other hand affect the powder properties, and increase the pumping force of the tower fan the negative pressure. 5.2.4 vacuum tower is the negative pressure spray drying tower to control the most important parameter, which determines the particle size distribution of powder, and leave the tower in the instant powder, negative pressure on the powder particles played a homogenizing effect. The higher negative pressure, the small particles together with the steam discharge, d50: ~ large, whereas d50 decreases, but if the negative pressure rise too high will cause accelerated particles, the particles time to dry, causing high water content . Because the tower vacuum, tower pressure, atmospheric pressure will hold a short particles, slowing the stars expected to leave the speed of the tower, reaching the role of powder homogenization. 5.2.5 larvae L plate L Drive larvae larvae larvae L L plate affect the diameter of one unit of time into the quantity, the other stars expected size of the powder, the greater the larvae feeding quantity L larger diameter, d50 increases, but the powder will increase the water, whereas the smaller larvae feeding quantity L decreased diameter, d50 decreases, this, in turn plate must be periodically replaced. 5.2.6 pressure mud is mud pressure must be controlled,[link widoczny dla zalogowanych], the pressure increases, while mud feeding quantity increases,[link widoczny dla zalogowanych], the water content increased; the other hand, a high increase in slurry, mud plus stay in the tower long, atomized droplets decreases, d50 reduced powder, powder moisture decreased, so the pressure on the powder slurry of water tower must be based on a different analysis. 3.3 old stale powder generally has two roles, on the one hand all of the water, on the other hand reduce the powder temperature, a rubber membrane to prevent scorch. Therefore, subject to stale powder before use. The old control humidity and temperature must be no conditions for the plant, may wish to make the powder sealed. 4. Conclusions In order to create products that meet the requirements, the best use of isostatic pressing, HIP is produced to meet the requirements of the powder,[link widoczny dla zalogowanych], preferably wet milling, spray drying powder manufactured in the milling process, the recommendations from the considered in terms of control of powder: 1. Control the solid content and mud flow time. 2. Select raw materials to add a small mud compound type and the amount added. 3. Materials and air flow from the two systems to consider reasonable adjustments spray drying process parameters. 4. Method of constant temperature and humidity storage of powder used.
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