The disclosure discloses a spiral-flow type fluidized-bed cooling crystallization system. The system comprises a first fluidized-bed crystallizer, a second fluidized-bed crystallizer, a crystal growing tank, a centrifuge, a circulating pump, a flow control valve, a densimeter and the like, wherein vertical heat transfer pipes are arranged in the first fluidized-bed crystallizer and the second fluidized-bed crystallizer, and scraping particles are contained in the heat transfer pipes. According to the invention, feed liquid exchanges heat with a cooling medium through the vertical heat transfer pipes; meanwhile, spiral spray heads at the bottoms of the heat transfer pipes are used for enabling the feed liquid in the pipes to form a spiral flow field, and the scraping particles are efficiently driven to continuously impact and crush crystals attached to heat transfer wall faces, so the effects of heat transfer enhancement, heat transfer wall face self-cleaning.

A sand separation system and method for operating a sand separation system, in which the method includes separating sand from a fluid using a separator. The method includes, signaling for a blowdown unit to blowdown the separator, opening one or more blowdown valves of the blowdown unit coupled to the separator in response to the signaling, so as to blowdown the separator, and receiving the sand from the separator into a sand disposal unit. The sand passes through the one or more blowdown valves that are opened. The method includes measuring a weight of at least some of the sand that was separated in the separator using a load cell of the separator, a load cell of the sand disposal unit, or both, and determining a blowdown interval for subsequent blowdown operations of the separator based in part on the weight of the sand.

The disclosure relates to a method for separation and purification of N-acetyl-glucosamine, and belongs to the technical field of biological engineering. In the disclosure, a raw material solution containing N-acetyl-glucosamine is obtained by microbial fermentation or by hydrolyzing the chitin. The raw material solution is subjected to flocculation pretreatment, and continuous centrifugation or pressure filtration is performed to remove suspended solids such as microorganisms, proteins and polysaccharides to obtain clear liquid. Double-stage ion exchange chromatography is performed to remove impurities such as charged organic molecules and inorganic salts. Membrane concentration is performed to efficiently remove water to improve the concentration of the target product. Spray drying or further evaporation concentration and crystallization are performed. Finally drying is performed to obtain an N-acetyl-glucosamine crystal of which the purity is more than 99%.

This disclosure describes methods to separate solids from liquids in a production facility. A process separates components in the process stream by using a mechanical device to separate the solids from the liquids based on a density difference. The process produces the liquids and solids, which may be further processed to create valuable animal feed products.

This disclosure describes methods to separate solids from liquids in a production facility. A process separates components in the process stream by using a mechanical device to separate the solids from the liquids based on a density difference. The process produces the liquids and solids, which may be further processed to create valuable animal feed products.

The invention relates to a solid bowl centrifuge with a horizontal elongated, hollow, rotatable, solid-wall bowl (2) with an inlet and an outlet and a rotatable screw conveyor with a shaft (6) and helical screw (7) rotatable mounted inside said bowl and extending substantially the full length thereof. It is mainly characterized in that on the shaft there are mounted a number of truncated conical discs (24), whereby the discs are directly surrounded by the helical screw. With such design the decanter capacity can be increased and the polymer consumption reduced. Further power consumption can be reduced by obtaining the same performances as the traditional decanter at lower rotational speed (lower g-force).

A separation tank for crude oil. Fluid enters an inlet section of a center column of the tank via an offset inlet pipe so the fluid enters swirling. Solids that settle in the inlet section are removed by a center column drain and a solids removal system. Free gas rises and exits from the top of the tank. Liquid flows out of the center column via a diffuser that spirals the fluid evenly toward the wall of the tank where oil coalesces and wicks upward. Liquid flows downward around two flow diverting baffles where more oil coalesces and wicks upward via an oil conduit into the oil layer. The water flows under the lower flow diverting baffle and exits the tank through the outlet section. A large circular oil collector weir uniformly removes oil from the oil layer. Interface draw offs located below the oil-water interface remove excess BS&W.

A clip of the present application generally comprises a first clip member, a second clip member, and a retention feature. The first clip member and the second clip member are coupled together and capable of being placed in at least two positions. In the first position, the clip is capable of receiving a bag containing a fluid, and, in the second position, the bag is capable of being held between the first and second clip members. While the clip is holding the bag, two or more pockets are formed in the bag, and the fluid is generally restricted or prohibited from transferring from one pocket to another pocket while the clip is in this position. A retention feature retains the clip, which is holding a bag, to a centrifuge receptacle and allows the clip to be placed in a predetermined position on the centrifuge receptacle.

The invention relates to a system, comprising: a) a sample processing unit, comprising an input port and an output port coupled to a rotating container having at least one sample chamber, the sample processing unit configured provide a first processing step to a sample or to rotate the container so as to apply a centrifugal force to a sample deposited in the chamber and separate at least a first component and a second component of the deposited sample; and b) a sample separation unit coupled to the output port of the sample processing unit, the cell separation unit comprising separation column holder (42), a pump (64) and a plurality of valves (1-11) configured to at least partially control fluid flow through a fluid circuitry and a separation column (40) positioned in the holder, the separation column configured to separate labeled and unlabeled components of sample flowed through the column.

To provide a quantum dot and manufacturing method of the dot particularly capable of reducing organic residues adhering to the quantum dot surface and of suppressing the black discoloration occurrence of a layer including the quantum dot positioned immediately above a light emitting device, and a compact, sheet member, wavelength conversion member and light emitting apparatus with high luminous efficiency using the quantum dot, a quantum dot of the present invention has a core portion including a semiconductor particle, and a shell portion with which the surface of the core portion is coated, and is characterized in that a weight reduction up to 490° C. is within 75% in a TG-DTA profile. Further, the quantum dot of the invention is characterized in that oleylamine (OLA) is not observed in GC-MS qualitative analysis at 350° C.