64results about How to "Long continuous operation period" patented technology

The invention discloses a process for producing starch sugar. The process comprises the following steps of: pulp-conditioning edible starch; liquefying; passing liquefied starch through a primary floating clarifier, guiding an upper floating sugar dreg liquid into a primary buffer tank, and then entering a primary disc-type centrifuge to be centrifugated and separated so as to extract sugar dregs; combining a clear sugar liquid flowing out of the primary disc-type centrifuge and a clear sugar liquid flowing out of the primary floating clarifier and flowing into a saccharifying tank to be saccharified into a saccharified liquid; passing the saccharified liquid through a secondary floating clarifier, guiding an upper floating sugar dreg liquid into a secondary buffer tank, and then enteringa secondary disc-type centrifuge to be separated so as to extract sugar dregs; combining a clear sugar liquid flowing out of the secondary disc-type centrifuge and a clear sugar liquid flowing out ofthe secondary floating scum clearing device and filtering by passing through a membrane micro-filtration system; and flowing a micro-filtered concentrated liquid containing dregs back to the secondary buffer tank, entering a micro-filtered clear sugar liquid into an ion exchange system to be decolorized and desalted, and then finally concentrating into a product. According to the process for producing the starch sugar disclosed by the invention, filter aids and activated carbon are not required in the clarification and the filtration processes, and high-purity sugar liquid can be obtained through the efficient operation of solid-liquid separation equipment; and meanwhile, sugar dregs without the filter aids and the activated carbon are extracted and can be used as a feedstuff raw materialfor animals, thereby changing waste into valuable, and no discharge of filtered solid wastes during the whole process exists.

The invention relates to the technical field of hydrate synthesis, storage and transportation and particularly relates to a supergravity hydrate synthesis device. The supergravity hydrate synthesis device comprises a cut-off valve, a one-way liquid valve, a nozzle, a one-way gas valve, a pressure regulating valve, a gas buffer tank, a compressor, a condenser, a turbine flowmeter, an ice maker, a pressure gauge, a pulping machine, a slurry pump, a surfactant storage tank, a Laval spraying valve, a mass flowmeter, a vertical three-phase separator and a supergravity reactor. The supergravity hydrate synthesis device adopts a supergravity technology for enhancing the heat transfer and mass transfer in a hydrate synthesis process, so that the reaction time is shortened, the equipment size decreases, the production cost is reduced, and a tapered outlet is formed so as to be helpful to the outflow of generated hydrates.

The invention belongs to the field of air separation technology and in particular relates to a separation technique for low pressure oxygen-enriched air, comprising the steps of impurity removal by means of air filtration, compression to 0.33-0.44MPa with an air compressor, purification, heat exchange, rectification, liquid oxygen vaporization and pressurization. The technique has the characteristics of being simple in technological process, convenient in operation, stable and reliable in running, stable in oxygen purity of the product, less in outside interference factors, long in continuous running period, low in power consumption for oxygen generation, low in equipment cost, high in automation degree and convenient in engine start and stop.

The invention discloses a method and a device for removing coal dust and oil by enabling coal to be directly liquefied and generate sulphur-bearing waste water in the technical field of coal conversion. The method and the device can avoid deposition blocking of the coal dust in a stripping tower, reduce loads of a steam stripping device and improve steam stripping effect, the running cycle of the device is prolonged, simultaneously recycling of dirty oil is facilitated, the processing loss of the device is reduced, and the economic benefit of the device is improved. Besides, a micro cyclone separator and a cyclone deoiler which are adopted in the device are high in separating efficiency, long in continuous running cycle, small in occupied area, high in impact resistance and simple to operate and maintain. The method and the device are characterized in that the device for removing the coal dust and the oil by enabling the coal to be directly liquefied and generate the sulphur-bearing waste water comprises an adjusting tank, a sewage pump, the micro cyclone separator, a precision filter, the cyclone deoiler and the stripping tower; and sewage finally enters into the stripping tower to be treated after the sewage is treated by the adjusting tank, the sewage pump, the micro cyclone separator, the precision filter and the cyclone deoiler.

An apparatus to co-produce formaldehyde and UFC (urea-formaldehyde concentrate) by iron-molybdenum process comprises a methanol evaporator, a methanol oxidizer and an absorbing column; fresh air and methanol vapor are mixed in the methanol evaporator, and formaldehyde is generated in the methanol oxidizer; formaldehyde vapor enters the absorbing column via the methanol evaporator; in the absorbingcolumn, the formaldehyde vapor is liquefied, and a liquid formaldehyde product is attained from the bottom; urea and an alkali liquid are added into the absorbing column to react with the formaldehyde to obtain UFC. The apparatus has the advantages that consumption indexes are good, single consumption of formaldehyde is 0.422-0.426 t, byproduct vapor specification is high, up to 22 bar 0.75 t / t,oxidation temperature is controlled to 245-380 DEG C, the methanol oxidizer has designed life up to 20 years and longer, the whole apparatus has designed life of not shorter than 35 years, the apparatus is suitable for flexibly producing formaldehyde products having a concentration of 37-55%, UFC can be produced just by proportionally adding an alkali liquid, and in order to further increase absorbing efficiency of process water, sodium hydroxide solution can be injected into the system to remove the byproduct, formic acid.

The invention relates to a radial fixed bed oxidative dehydrogenation reactor for regenerating a catalyst by sections and belongs to the field of chemical manufacturing equipment. A reaction gas outlet of a 1# reactor is connected with a reaction gas inlet of a 2# reactor through a pipeline. The radial fixed bed oxidative dehydrogenation reactor is characterized in that each one of the 1# reactor and the 2# reactor is a bearing shell formed by a cylindrical body, an upper end socket and a lower end socket; each bearing shell is internally provided with a catalyst inner cylinder and a catalyst outer cylinder, which are concentric and are formed by an opening cylinder and a Johnson net; the catalyst is filled into an annular space between the catalyst inner cylinder and the catalyst outer cylinder; and the part of the Johnson net is filled with an inert magnetic ball. A plurality of annular plates are arranged between the catalyst outer cylinder and the catalyst inner cylinder and a space between the catalyst outer cylinder and the catalyst inner cylinder is divided into a plurality of sections; and each section of the 1# reactor is provided with a material inlet and each section of the 2# reactor is provided with a reaction gas inlet and a regenerated gas inlet. The radial fixed bed oxidative dehydrogenation reactor for regenerating the catalyst by sections disclosed by the invention realizes the aim of carrying out an oxidative dehydrogenation reaction and catalyst regeneration at the same time in an online manner.

The invention relates to a flash evaporation-sedimentation-fluidized bed separation combined purification method and device for coal gasification black water. The flash evaporation-sedimentation-fluidized bed separation combined purification method for the coal gasification black water comprises the following steps: (i) carrying out flash evaporation treatment on the coal gasification black water; (ii) feeding the coal gasification black water having been subjected to flash evaporation treatment into a sedimentation tank, conducting sedimentation and separating, feeding bottom concentrated suspended matters into a vacuum filter pressing system, and feeding a supernatant of the sedimentation tank, namely coal gasification ash water, into an ash water tank; (iii) pumping the coal gasification ash water out of the ash water tank, and sending the coal gasification ash water to a fluidized bed separator to deeply remove fine particles in the coal gasification ash water; (iv) sending the coal gasification ash water purified by the fluidized bed separator to a deaerator for deoxygenation; and (v) after the fluidized bed separator is operated for a period of time and a pressure difference is 0.3 MPa, mixing the coal gasification ash water and nitrogen, and reversely feeding the obtained mixture to regenerate a separation medium of the fluidized bed separator. The invention further provides the flash evaporation-sedimentation-fluidized bed separation combined purification device for coal gasification black water.

The invention relates to coolant rotational-flow purification methods and devices for boron removal sections of boron recycle systems and provides a coolant rotational-flow purification method for a boron removal section of a boron recycle system. The method comprises the following steps that (i) a micro-rotational-flow separation complete device is provided, wherein the device comprises a shell (1), a micro-cyclone core tube (3) and a dust hopper (9); the shell (1) comprises an upper cavity, a middle cavity (6) and a lower cavity; the micro-cyclone core tube (3) is arranged in the middle cavity (6); the dust hopper (9) is arranged in the upper cavity; (ii) in the boron removal section, reactor coolant distillate is fed into the middle cavity of the micro-rotational-flow separation complete device after boron removal is performed, and rotational-flow separation is performed on the distillate through the micro-cyclone core tube to separate solid impurity particles from the distillate to obtain concentrate containing the solid impurity particles and clear liquid; (iii) the obtained concentrate is fed into the upper cavity to be settled in the dust hopper, so that filtrate is obtained; (iv) the obtained filtrate and the obtained clear liquid converge and then flow to downstream equipment.