79results about "Evaporators with vertical tubes" patented technology

The present application relates to a kind of hot exciting flash evaporation loop lift heat exchanger, including upper head, lower head, cylinder, several heat exchange tubes, the upper end surface of cylinder and the upper head form cavity I between, the lower end surface of cylinder and the lower head form cavity II between, cavity I, cavity II and the inner cavity of cylinder are not communicated with each other between, heat exchange tube is fixed in the inside of cylinder by tube sheet, the upper end of heat exchange tube is placed in cavity I and is communicated with cavity I, lower end and cavity II are communicated, cylinder includes lift section cylinder and hot exciting section cylinder, heat exchange tube includes lift section heat exchange tube and hot exciting section heat exchange tube, lift section heat exchange tube and hot exciting section heat exchange tube are communicated by throttling component between, the inner diameter of throttling component is less than the inner diameter of hot exciting section heat exchange tube.The heat exchanger of the present application is provided with a kind of hot exciting flash evaporation loop lift, will hot exciting pressurization energy storage, throttling flash evaporation kinetic energy release, loop lift heat exchange and vapor-liquid separation function integration in same equipment, solve the problem of traditional lift section heat exchanger dependence big temperature difference.

The utility model discloses a vertical pipe efficient falling film evaporator, and belongs to the technical field of vertical pipe falling film evaporators.The vertical pipe efficient falling film evaporator comprises an evaporation mechanism, two sets of inserting rods are pressed, the two sets of inserting rods enter a mounting block, the mounting block is inserted into a mounting groove block, and the inserting rods are inserted into the mounting groove block under the action of spring bounce; the movable scraping plate is installed in the vertical pipe evaporator body through the installation block, the servo motor drives the connecting rod to rotate, the connecting rod drives the flow guide block and the connecting block to rotate, it can be guaranteed that material liquid is evenly discharged through the flow guide block, and the material liquid can be evenly discharged through the flow guide block. The connecting block drives the movable scraper to rotate, the material liquid can be evenly smeared, the inner wall of the vertical pipe evaporator body can be conveniently cleaned in the later period, the material liquid can be conveniently and evenly discharged and evenly smeared, mounting and dismounting are convenient, the evaporation and extraction efficiency is improved, operation is easy and fast, and using is convenient.

A hybrid process and system for separating water from an inlet brine solution is disclosed. The hybrid process couples at least two different separation processes / systems. The inlet brine solution is fed into a first separation process, which produces a water distillate and a brine concentrate. The brine concentrate from the first separation process is then fed into the second separation process to further recover additional water. The excess heat from the second separation process is supplied to the first separation process.

The invention relates to a process for obtaining free fatty acid and / or free fatty acid ester, in which a liquid mixture containing the free fatty acid and / or the fatty acid ester is separated by contacting a vapour of the liquid mixture in a column of a distillation apparatus with condensate formed from the vapour running downward, wherein heat and mass transfer takes place between the vapour and the condensate on column internals. According to the invention, the column has at least 10 theoretical plates and the separation is conducted with a pressure drop between the top and bottom of the column Δp of ≥ 3.3 mbar. Appropriately, the liquid mixture, preferably produced from vegetable oil or from fish oil, contains polyunsaturated fatty acid, preferably omega-6 or omega-3 fatty acid and / or alkyl monoesters and / or glycerol monoesters. In one configuration of the invention, the column has at least 30, preferably at least 40, theoretical plates and the separation is conducted with a pressure drop Δp between 3.5 mbar and 6 mbar.

The invention relates to an evaporator-condenser-type heat exchanger comprising a plurality of zones, each zone comprising at least one extractor means configured to channel at least a portion of the primary vapor generated in said zone towards the outside of the heat exchanger. The heat exchanger includes a plurality of sub-assemblies consisting in part of a layer of a thermally conductive material.

In one aspect, a mass exchanger having an air inlet, air outlet, airflow generator, and a tubular membrane assembly. The tubular membrane assembly includes an inlet header, an outlet header, and a plurality of tubular membranes. The tubular membranes have side walls configured to facilitate mass transfer between air contacting the tubular membranes and working fluid in the tubular membranes. The inlet header includes an inlet header body having inlet header body openings with inlet end portions of the tubular membranes extending in the inlet header body openings and inlet header potting connecting the inlet end portions of the tubular membranes to the header body. The outlet header includes an outlet header body having outlet header body openings with outlet end portions of the tubular membranes extending in the outlet header body openings and outlet header potting connecting the outlet end portions of the tubular membranes to the header body.

To provide an improved vapor compression distillation system.SOLUTION: The distillation device comprising a raw fluid input and an evaporator 6060 in fluid communication therewith, the device further comprising a compressor 6064 having an impeller coupled to a motor, the compressor having a low pressure inlet for vapor from the evaporator and a high pressure outlet for compressed vapor, the device further comprising a temperature sensor 6066 monitoring the temperature of the vapor at the inlet, and a condenser 6076 in heat transfer relationship with a plurality of external surfaces of the evaporator and in fluid communication with the outlet of the compressor; The device further comprises a controller 6034 for adjusting the rotational speed of the impeller with an impeller motor command based on a calibrated motor speed for the distillation device, wherein the controller is configured to determine an adjusted motor speed for a next device use and overwrite the calibrated motor speed with the adjusted motor speed.SELECTED DRAWING: Figure 2

The invention discloses a pipe and plate combined triple-effect countercurrent 32-50% caustic soda evaporation process and device, and belongs to the field of caustic soda production, the pipe and plate combined triple-effect countercurrent 32-50% caustic soda evaporation device comprises an evaporation unit, a heat exchange unit, a condensate water recovery unit and a vacuum unit; the evaporation unit comprises a first-effect tubular falling film evaporator, a matched first-effect separation chamber, a second-effect plate-type evaporator, a matched second-effect separation chamber, a third-effect plate-type evaporator, a matched third-effect separation chamber and a surface condenser; new steam is introduced into a shell pass of a heating chamber of the first-effect tubular falling film evaporator, a secondary steam outlet of the first-effect separation chamber is connected with a heating side inlet of the second-effect plate-type evaporator, a secondary steam outlet of the second-effect separation chamber is connected with a heating side inlet of the third-effect plate-type evaporator, and a secondary steam outlet of the third-effect separation chamber is connected with the surface condenser. The device has the effects of improving the heat energy utilization efficiency and reducing the energy consumption.

The embodiment of the invention relates to the technical field of evaporators, in particular to a liquid separation structure suitable for a micro-channel evaporator and the evaporator with the liquid separation structure. The liquid separation structure comprises a liquid blocking part which is used for blocking the upper portion of an inlet of each vertical micro-channel pipe and preventing a working medium from entering the inlet of each vertical micro-channel through the upper portion of the liquid blocking part. The structure further comprises a drainage part which is connected with the liquid blocking part and used for guiding the working medium at the liquid blocking part to flow to the bottom of the collecting pipe. In addition, the structure further comprises a liquid inlet space, and a space formed below the liquid blocking part is surrounded by the drainage part and the liquid blocking part, so that the working medium accumulated at the bottom of the collecting pipe can overflow inlets of the vertical micro-channels exposed in the liquid inlet space through the liquid inlet space. The liquid distribution structure can uniformly distribute a working medium entering the sealed collecting pipe into a plurality of vertical micro-channel pipes which are inserted into the bottom of the collecting pipe side by side in a sealed manner.

The present application provides a kind of black liquor seed crystal concentration evaporator, including outer flow pipe type falling film concentration evaporator unit, black liquor seed crystal mixing and steam separator.Outer flow pipe type falling film concentration evaporator unit includes medium-pressure steam inlet box, black liquor liquid inlet flow guide film forming box, black liquor outer flow falling film evaporation box and condensate and non-condensable gas discharge box.Outer flow pipe type falling film concentration evaporator unit is connected with black liquor seed crystal mixing and steam separator by concentration black liquor discharge pipe.Black liquor seed crystal mixing and steam separator.Due to the modular design of outer flow pipe type falling film concentration evaporator unit, different black liquor processing capacity can be connected with black liquor seed crystal mixing and steam separator by pipeline through multiple units to realize.

A separation system separates a first liquid from a composite liquid. Examples of the composite liquid are seawater, brine, rainwater, wastewater, a biofuel precursor, lactic acid, or juice. The plate heat exchanger includes at least one evaporation channel and at least one condensation channel. The composite liquid flows through the evaporation channel, wherein the first liquid evaporates from the composite liquid into the gas. The direct heat exchanger also vaporizes the first liquid into the gas. The gas flows from the direct heat exchanger through a condensation channel, where the first liquid condenses and thereby separates from the composite liquid.

The utility model relates to the technical field of low-temperature evaporators, in particular to a detachable pipeline for a low-temperature evaporator, which comprises a liquid adding part and an evaporating pot, the liquid adding part comprises a bottom shell, the top end of the bottom shell is opened, a splitter plate is horizontally fixed in the bottom shell, and a plurality of evaporating pipes are uniformly and vertically assembled on the top surface of the splitter plate in a communicated manner; the bottom end of the evaporation tank is opened, the evaporation tank is detachably communicated and assembled with the top end of the bottom shell, a steam inlet pipe is horizontally communicated and fixed to the upper side of the outer wall of the evaporation tank, a steam exhaust pipe is horizontally communicated and fixed to the lower side of the outer wall of the evaporation tank, and a liquid adding pipe is vertically communicated and fixed to the bottom surface of the bottom shell; and a liquid discharge pipe is vertically communicated and fixed on the top surface of the evaporation tank. When the low-temperature evaporator is used, evaporation liquid is heated and evaporated in the pipeline, evaporation solid impurities remain in the pipeline in the heating and evaporation process, in order to clean the impurities, the wall of the pipeline becomes thick, the heat conduction efficiency of the evaporation pipeline is improved, and the conversion efficiency of the low-temperature evaporator is guaranteed.

The application relates to an MVR system based on a heat shock flash evaporation loop lift heat exchange, which comprises a lift heat exchanger, a vapor-liquid separator, a preheater, a heat shock heater and a throttling component, the preheater is communicated with the heat shock heater, the condensate inlet of the preheater is communicated with the condensate outlet of the lift heat exchanger; the material outlet of the heat shock heater is communicated with the feed inlet of the lift heat exchanger through the throttling component; the lift heat exchanger is communicated with the vapor-liquid separator, so that the secondary steam in the lift heat exchanger enters the vapor-liquid separator, the gaseous phase after separation is compressed and introduced into the lift heat exchanger, and is used as a heat source of the lift heat exchanger; the concentrated liquid flowing out of the vapor-liquid separator and the lift heat exchanger is extracted when the concentration detection is qualified, and is re-injected into the heat shock heater after being pressurized for reuse when the concentration detection is unqualified. The application can form a stable circular flow without relying on a large temperature difference, matches the narrow temperature difference heat transfer characteristics of the MVR system, and greatly reduces the high-grade energy consumption of the lift heat exchanger.

Embodiments of the invention provide systems and methods for water treatment and / or desalination.

The invention relates to the field of evaporators, in particular to an efficient heat exchange evaporator. Comprising a shell; a first partition plate and a second partition plate are fixedly connected in the shell; a plurality of heat exchange pipes are fixedly connected between the first partition plate and the second partition plate. According to the invention, the cooling liquid in the cavity is squeezed into the heat exchange groove, so that all the cooling liquid can exchange heat with the heat exchange pipe through the smaller heat exchange groove, and the problem that the cooling cavity of the existing evaporator is mostly of an integral structure, so that the cooling liquid far away from the heat exchange pipe area cannot exchange heat fully and is directly discharged out of the cooling cavity is solved; a sliding plate and a wiping ring are driven to move up and down through a first electric push rod, and then dirt attached to the outer wall of the heat exchange tube is wiped and scraped through bristles on the inner ring of the wiping ring; a second electric push rod drives a fixing plate, a sliding rod and a scraper to move up and down, dirt on the inner wall of the heat exchange tube is wiped and scraped through the scraper, and the problem that the dirt adheres to the inner wall and the outer wall after the heat exchange tube is used for a long time, and the heat exchange efficiency is affected is solved.

This disclosure provides a baffle plate for a shell-and-tube heat exchanger. The baffle plate includes a flat plate having a region comprising a plurality of annular elements designed to receive tubes from the shell-and-tube heat exchanger. The annular elements are arranged in at least two rows, wherein the rows are staggered relative to adjacent rows. The outer diameter of each annular element is less than 130% of its inner diameter, and each annular element engages with all its adjacent annular elements via a bridging structure oriented along a line connecting the centers of two adjacent annular elements in the plane of the plate, thereby defining a plurality of openings in the plate. This disclosure also provides: a shell-and-tube heat exchanger; a method for heating a liquid composition; a method for stripping a liquid composition comprising urea, carbamate, ammonia, and water; and a method for producing a solid particulate urea-based composition.

The invention discloses a liquid distributor and a falling film head for a falling film evaporator. The liquid distributor comprises a liquid inlet distribution mechanism, a heat exchange mechanism and a collecting and discharging mechanism, the heat exchange mechanism comprises a heating cylinder, two tube plates, a plurality of heat exchange tubes and a plurality of falling film heads, the tube plates are fixedly connected to the inner walls of the upper end and the lower end of the heating cylinder, the upper ends and the lower ends of the heat exchange tubes penetrate through the tube plates at the upper ends and the lower ends correspondingly, and the falling film heads are horizontally arranged and fixedly installed at the upper ends of the heat exchange tubes in a one-to-one correspondence mode. Tangential notches parallel to the center line of the heat exchange tube are symmetrically formed in the two sides of the falling film head. The liquid inlet distribution mechanism is provided with a liquid distributor and comprises a distribution cone, a drainage cylinder and an unpowered flow dividing assembly, and the flow dividing assembly evenly disperses liquid to the surface of the tube plate through rotation of a flow dividing paddle. By optimizing the distribution structure and the flowing mode, the problems of wall drying, splashing, scaling and the like caused by uneven liquid distribution and out-of-control flow speed in the prior art are solved, and the uniformity and the heat transfer efficiency of a liquid film are improved.

The present invention relates to a process for preparing a refined vegetable oil. It relates to a process for reducing the content of free chloropropanols and chloropropanol fatty acid esters in a vegetable oil, and it is comprising the following steps in order: a) refining a vegetable oil, wherein the refining is comprising at least a deodorization step at a temperature below 230° C., and subjecting the refined vegetable oil to a short path evaporation, and collecting a vegetable oil having a content of free chloropropanols and chloropropanol fatty acid esters of not more than 500 ppb and a color expressed as its red component equal or below 3.0.

The invention discloses a phosphoric acid concentration production device which comprises a tail gas defluorination treatment unit, a falling film heat exchange waste heat absorption unit, a condensation heat carrying and lifting unit, a steam treatment and recycling unit and a tail gas condensation and evacuation unit, and the tail gas defluorination treatment unit is used for communicating a phosphoric acid evaporation concentration flash chamber with the falling film heat exchange waste heat absorption unit; a shell pass A of the falling film heat exchange waste heat absorption unit is communicated with the condensation heat exchange carrying lifting unit, and a tube pass A of the falling film heat exchange waste heat absorption unit is communicated with the tail gas condensation evacuation unit. The invention discloses a phosphoric acid concentration production method. The method comprises the following steps: S1, starting preparation; s2, starting steam circulation; s3, starting steam circulation; s4, falling film heat exchange; s5, heat is transferred; and S6, heat source replacement. Polluted heat can be converted into clean heat energy; heat energy at a low temperature position can be effectively carried and converted into heat energy at a medium temperature position; the problems of phosphoric acid concentration production blockage, poor operation environment and short operation period in a traditional mode can be solved.

The utility model discloses a product concentration device for chicken essence production belongs to chicken essence production technical field, and this product concentration device for chicken essence production includes the condensation jar and installs the liquid inlet pipe and the liquid outlet pipe of the two sides of the condensed pipe outer wall, the steam heating pipe is fixed with in the inlay of the central position department of condensation jar, and the inner wall top of condensation jar is fixed with the baffle, and is separated with the equipment bin through the baffle, wherein the top of condensation jar is fixed with the steam output pipe, the steam heating pipe is rotatably connected with the rotating pipe, the outer wall of rotating pipe is fixed with a plurality of heat -conducting stirring rods, and this product concentration device for chicken essence production drives the rotating pipe rotation through motor, drive shaft, first gear and second gear, and the heat -conducting stirring rod makes chicken essence fully contact with the heating source in the process of rotating, makes the steam heating pipe even heat to chicken essence, avoids the situation that chicken essence solution is sticky and heats the equipment one side because of the excessively high heating temperature.

The present disclosure relates to a corrosion resistant duplex stainless steel (ferritic austenitic alloy) which is suitable for use in a plant for the production of urea; and uses thereof. The disclosure also relates to objects made of said duplex stainless steel Furthermore, the present disclosure also relates to a method for the production of urea and to a plant for the production of urea comprising one or more parts made from said duplex stainless steel, and to a method of modifying an existing plant for the production of urea.

The utility model relates to chemical technical field, an embodiment of the utility model provides a kind of crystallization device for hydroquinone production, including flash crystallizer, the top of the flash crystallizer is provided with demister, the side of the flash crystallizer is provided with hydroquinone production component, the hydroquinone production component includes condenser, the condenser is arranged in the side of demister, the lower portion of the condenser is provided with condensate tank, the side of the condensate tank is provided with thickener, the lower portion of the thickener is provided with mother liquor tank, the upper portion of the mother liquor tank is provided with centrifuge, the side of the flash crystallizer is provided with crystallization discharge pump, the side of the crystallization discharge pump is provided with clear liquid pump, the side of the clear liquid pump is provided with condensate pump. By the above technical scheme, the technical problem that a kind of crystallization device for hydroquinone production in related art / prior art cannot make crystallizer can produce larger size crystal is solved.

The invention discloses a membrane module and a tubular falling film evaporator thereof, and relates to the technical field of evaporation, the membrane module comprises a membrane distribution plate and a discharge plate, the bottom of the membrane distribution plate is fixedly connected with a first isolation plate, the top of the discharge plate is fixedly connected with a second isolation plate, and a plurality of groups of evaporation tubes are annularly distributed between the membrane distribution plate and the discharge plate; driving mechanisms are arranged between the film distributing plate and the first isolation plate and between the discharging plate and the second isolation plate, transmission mechanisms are further arranged between the film distributing plate and the first isolation plate and between the discharging plate and the second isolation plate, and the two transmission mechanisms are in power connection with the two driving mechanisms correspondingly. The transmission mechanism is used for driving the multiple sets of evaporation pipes at the same time so that the multiple sets of evaporation pipes can rotate at the same time, and the rotating evaporation pipes enable evaporation liquid on the inner walls of the evaporation pipes to generate centrifugal force and turbulent flow. The centrifugal force can increase the friction force between the evaporation liquid and the inner wall of the evaporation pipe, the flow speed of the evaporation liquid on the inner wall of the evaporation pipe is reduced, and the evaporation liquid can wash the inner wall of the evaporation pipe through the turbulence effect.

The invention relates to a juice concentration plant (1) comprising at least one group of evaporators (2, 4), in particular Robert-type evaporators, configured to form a continuous boil (100) or a batch boil (200), said evaporators being supplied in parallel with high-pressure steam at a temperature between 90°C and 120°C, preferably around 100°C, from a high-pressure steam network (401) and producing at the outlet water vapor typically at 60°C. The plant (1) comprises at least one group of mechanical steam compressors (300) mounted in series, into which the water vapor is injected, said group of mechanical steam compressors being configured to produce at the outlet high-pressure steam at a temperature between 90°C and 120°C, preferably around 100°C. Control systems are in place to supply this group of mechanical steam compressors with a virtually constant flow of steam.

This invention relates to a corrosion-resistant duplex stainless steel (ferritic austenitic alloy) for use in an apparatus for urea production; and its applications. This disclosure also relates to objects made of said duplex stainless steel. Furthermore, this disclosure relates to a method for urea production and an apparatus for urea production comprising one or more components made of said duplex stainless steel, and to a method for modifying an existing apparatus for urea production.

The utility model relates to the technical field of spraying evaporation, in particular to a forced circulation spraying evaporator which comprises an evaporation cylinder, an air inlet bin and an air outlet bin are arranged at the upper end in the evaporation cylinder, a transfer bin is arranged at the lower end in the evaporation cylinder, and a plurality of heat exchange pipes are fixedly arranged in the air inlet bin, the transfer bin and the air outlet bin. A plurality of heat exchange fins are fixedly arranged on the surface of the heat exchange pipe, a plurality of spraying net plates are fixedly arranged in the evaporation barrel, liquid is driven by the water pump to forcibly circulate in the evaporation barrel, and the problem that circulation is not smooth when a traditional natural circulation evaporator treats a high-concentration and high-viscosity solution can be effectively solved. Forced circulation ensures uniform distribution and rapid flow of liquid on the surface of the heat exchange tube, so that the evaporation efficiency is remarkably improved, and the evaporation time is shortened.

The invention relates to a discharge chimney (16) for discharging a cryogen (H2), which has a liquid phase (LH2) and a gaseous phase (GH2), into the surroundings (15) of the discharge chimney (16), comprising a tubular chimney section (21, 22A, 22B), which extends along the direction of the gravitational force (g), wherein the interior (36) of the discharge chimney (16) is heat-insulated from the surroundings (15); a phase separator (31) for separating the liquid phase (LH2) from the gaseous phase (GH2); and an evaporator unit (37) for evaporating the separated liquid phase (LH2).

An evaporator includes: a cylindrical member 10 through which a heating medium can flow; a heat exchange structure provided on a radially inner side of the cylindrical member 10; and a jacket member 30 provided on a radially outer side of the cylindrical member 10 with a space so as to define a flow path for a liquid and a vapor thereof, the jacket member 30 having a feed port 31 for a liquid M1 and a discharge port 32 for a vapor.