23results about "Cascade evaporators" patented technology

Provided is a method for concentrating a sodium hydroxide aqueous solution including: in a stepwise concentration process of sodium hydroxide aqueous solution, including a concentration part in which a plurality of evaporators from a first evaporator to a nth evaporator are connected in series, adding a sodium hydroxide aqueous solution to the first evaporator and then performing evaporation to obtain a first sodium hydroxide concentrate, and recovering steam evaporated from the sodium hydroxide aqueous solution; and adding the first sodium hydroxide concentrate to an evaporator at a subsequent stage, and adding the steam recovered from the first evaporator to a mechanical vapor recompression device to perform compression, wherein the nth evaporator uses the compressed steam as a heat source.

The present application relates to the technical field of urea production, and is a urea system flushing evaporation flushing method and device. The urea system flushing evaporation flushing method pre-raises the temperature of the evaporation system before flushing, prevents excessive crystalline substances from blocking the pipeline by intermittently flushing the relevant parts of the second-stage evaporation separator, the top gas phase pipeline of the second-stage evaporation separator, the first-stage evaporation separator and the top gas phase pipeline of the first-stage evaporation separator, ensures that the urea evaporation system runs more stably, and recovers ammonia and other substances in the gas phase separated by evaporation after condensation to reduce the emission of pollutants. The present application has a reasonable and compact structure, a simple process, simple operation, low equipment cost, conforms to the development concept of environmental protection and resource utilization, not only makes the urea product meet the national standard GB2440-2017, but also makes the evaporation system run more stably.

The invention discloses a titanium dioxide waste acid concentration system and method, and belongs to the technical field of sulfuric acid process titanium dioxide production or similar waste acid concentration. The system comprises a primary concentration and ferrous separation module and a secondary concentration and ferrous separation module. The primary concentration and ferrous separation module realizes primary concentration and solid-liquid separation of waste acid through an evaporation concentration kettle, a flash tank and a primary diaphragm filter press; and the secondary concentration and ferrous separation module is used for carrying out deep concentration and secondary separation on the waste acid through a scraper evaporator and a secondary diaphragm filter press. The system adopts the technologies of ultrasonic descaling, stepped concentration and solid removal, partition temperature control film evaporation and the like, and is matched with a mirror surface level inner wall scraper evaporator and an adjustable rapping device, so that the problem of scaling blockage in the waste acid concentration process is effectively solved. The method can increase the concentration of waste acid to 60% or above, realizes continuous automatic operation, and has the advantages of low equipment investment, low operation cost, environmental friendliness, high resource recovery rate and the like.

The invention relates to a corn steep liquor dry powder production process and equipment. The production process comprises the following steps: 1, a corn steep liquor production process: (1) raw material pretreatment, (2) soaking process, and (3) soaking liquid separation; 2, concentrating the corn steep liquor; and 3, drying the concentrated corn steep liquor. The production equipment comprises a low-temperature vacuum concentrator, an evaporation concentration system with a heat pump system and a vacuum liquid belt dryer. The corn steep liquor concentration efficiency is high, the concentration effect is good, energy consumption is low, waste gas pollution is avoided, active ingredients of the corn steep liquor are well kept, and the product quality is excellent.

A modular water purification system comprising an evaporation assembly, a condensation assembly, and a waterproof enclosure The evaporation assembly is heated primarily by sun heat, with optional supplementary heating. The condensation assembly converts water vapor to liquid, optionally aided by external power. The waterproof enclosure covers and seals the condensation assembly and the evaporation assembly to prevent external contamination defining a water purification device. The water purification device includes an inlet for the water source and an outlet from the condenser reservoir. The modular water purification system allows for vertical stacking, enabling simultaneous increase in water elevation and purity as it progresses through the stack.

The present invention relates to a continuous process for obtaining 2-ethylhexyl acrylate (2-EHA) from a mixture (1) which is liquid under an absolute pressure in the range of 0.5 to 100 bar and has a temperature in the range of 0 to 300° C. and comprises 2-EHA, at least one high-boiling substance, at least one homogeneous catalyst and at least one low-boiling substance, in which the mixture (1) is reduced in pressure to an absolute pressure level in the range of 0.1 to 10 bar by a pressure maintaining device (3) and the resulting two-phase gas-liquid mixture (16) is continuously fed to a spiral tube evaporator (4) in which, at a temperature in the range of 50 to 300° C., the 2-EHA content of the liquid phase of the two-phase gas-liquid mixture is reduced by partial evaporation, which is accompanied in parallel by an increase in the 2-EHA content of the gas phase of the two-phase gas-liquid mixture, and the two phases are discharged in the form of a resulting two-phase gas-liquid output stream (17).

A method for concentrating an aqueous sodium hydroxide solution is provided, comprising: in a stepwise concentration process of an aqueous sodium hydroxide solution including a concentration section comprising a first evaporator to an nth evaporator connected in series, adding the aqueous sodium hydroxide solution to the first evaporator, then evaporating it to obtain a first sodium hydroxide concentrate, and recovering the vapor evaporated from the aqueous sodium hydroxide solution; and adding the first sodium hydroxide concentrate to a subsequent evaporator, and adding the vapor recovered from the first evaporator to a mechanical vapor recompression device for compression, wherein the nth evaporator uses the compressed vapor as a heat source.

The present invention relates to an arrangement that is suitable for processing an aqueous metal-containing slurry to separate undesired fractions therefrom, including the units intended for cooling the slurry and simultaneously causing air-induced evaporation of a fraction of the water in the slurry. Further, the invention relates to a method for such processing.

Provided herein is a method for treating a liquefied biomass product stream, said method comprising: i) providing a liquefied biomass product stream comprising hydrocarbons, water and emulsifier(s), ii) subjecting the liquefied biomass product stream to a high pressure high temperature separation step (HPHT) to obtain a heavy oil fraction (A), and a HPHT separator gas fraction, iii) subjecting the HPHT separator gas fraction to a high pressure separation step to obtain a stream with an increased amount of emulsifier(s), wherein the high pressure separation step is a high pressure medium temperature (HPMT) separation step or a high pressure low temperature (HPLT) separation step.

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.

The present invention relates to a method for concentrating a sodium hydroxide solution in a step-by-step process for concentrating the sodium hydroxide solution using a concentration unit in which a plurality of evaporators from a first evaporator to an nth evaporator are connected in series, the method comprising: introducing the sodium hydroxide solution into the first evaporator and then evaporating same to obtain a first sodium hydroxide concentrate, and recovering steam evaporated from the sodium hydroxide solution; and introducing the first sodium hydroxide concentrate into a subsequent evaporator, and introducing the steam recovered from the first evaporator into a mechanical steam recompression device and compressing same, wherein the nth evaporator uses the compressed steam as a heat source.

A system includes a first separator configured to receive waste water, retain a first portion of the waste water, and separate the first portion of the waste water into a first vapor and a first solid material; and a second separator in fluid communication with the first separator, the second separator being configured to receive a second portion of the waste water from the first separator and to separate the second portion of the waste water into a second vapor and a second solid material, the second separator including a first condenser, a heating element, and a first electrocoagulation unit. Related apparatus, systems, techniques and articles are also described.

The present invention belongs to the technical field of evaporation concentrators, and particularly relates to an electromagnetic induction evaporation concentrator, which includes an evaporation chamber, a separator, a first heating device and a second heating device. Both the first heating device and the second heating device include a magnetic conductive circular tube and an induction coil. The induction coil is wound around the magnetic conductive circular tube, and the induction coil is electrically connected to an alternating current induction power supply. The magnetic conductive circular tube of the first heating device is sleeved on the lower part of the evaporation chamber. The secondary steam outlet of the evaporation chamber is communicated with the steam inlet of the separator. The magnetic conductive circular tube of the second heating device is sleeved on the pipeline of the steam outlet of the separator. Beneficial effects: This electromagnetic induction evaporation concentrator omits the compressor, has a low cost, a wider application range, is more energy-efficient than MVR, has higher efficiency, is safe and reliable when evaporating and concentrating organic solvents, has no noise pollution problem, and the silica wool plays a role in sound absorption. It is convenient for replacement and maintenance and has a long service life.

The invention belongs to the technical field of evaporators, and particularly relates to an MVR single-effect multi-body evaporator set. Comprising a separator and a plurality of MVR evaporators, a shell of each MVR evaporator is composed of a feeding section, a heating section and a discharging section, a steam inlet is formed in the side face of the upper portion of each heating section, and a steam outlet is formed in the side face of the lower portion of each heating section; a separator steam inlet is formed in the side face of the lower portion of the separator and connected with a steam conveying pipeline, the steam conveying pipeline is connected with a steam collecting pipeline, the steam outlet is connected with a steam exhaust pipe, and the steam exhaust pipe is connected with the steam collecting pipeline. A second partition plate is arranged in the feeding section, a third partition plate is arranged in the discharging section, and a material passing pipe is arranged in the heating section; a stirring rod is arranged in the material passing pipe; according to the invention, steam recycling is carried out on the plurality of MVR evaporators through the steam collecting pipeline and the separator, so that the heat conduction heating efficiency of each evaporator is improved, and the overall operation cost is reduced.

Embodiments relate to a urea plant and operation of the urea plant in a low load mode. In embodiments, two evaporators connected in parallel to a finishing section and a melamine plant, respectively, are used.

The present application provides a water removal and recovery system and water removal and recovery method for LiFSI. Specifically, two stages of thin-film evaporators connected in series are used to purify a crude LiFSI product, so that LiFSI with sufficiently high purity is obtained by means of a relatively simple configuration. A thin-film evaporator itself integrates an evaporation system and a condensation system, not only simplifying the system configuration of connecting piping or pipes, but also reducing resistance and reducing the risk of system leakage. In addition, after evaporation, a solvent and water can be effectively separated by means of a water separator, such that the content of an organic phase solvent in the separated water is very low and the content of water in the organic phase solvent is also very low. In this way, a solvent with high purity can be recovered as much as possible for reuse, and the treatment costs of wastewater can be reduced.

The present invention provides a film-forming raw material mixed gas generator and film-forming apparatus that can more reliably vaporize the film-forming raw materials. [Solution] A film-forming raw material mixed gas generating apparatus according to one aspect of the present invention comprises: a film-forming raw material supply unit that supplies liquid film-forming raw materials at a predetermined flow rate; a carrier gas supply unit that supplies carrier gas at a predetermined flow rate; a main vaporization unit that vaporizes the film-forming raw materials by heating the film-forming raw materials supplied from the film-forming raw material supply unit and the carrier gas supplied from the carrier gas supply unit; and an auxiliary vaporization unit having a porous vaporization member that captures droplets of the film-forming raw materials carried over into the gas flowing out from the main vaporization unit and vaporizes the captured droplets of the film-forming raw materials.

A process that produces a non-alcohol cereal beverage (NACB) includes separating an input fermented malt beverage (FMB) into an output FMB and the NACB, wherein the separating includes multiple stages; and adding water during the separating so that the output FMB has the same alcohol by volume (ABV) as the input FMB during each stage of the separating.

Embodiments pertain to a urea plant and to the operation of a urea plant in a reduced load mode. In embodiments, two evaporators in parallel are used, connected to a finishing section respectively to a melamine plant.

The invention provides an ecological sea salt production method which comprises the following steps: absorbing moisture and storing water: during moisture absorption, filtering seawater at a water inlet through three filtering processes and then entering a reservoir for precipitation; the brine preparation process comprises the following steps: evaporating the settled seawater in the water storage tank in a primary evaporation tank, a middle evaporation tank and a high evaporation tank in sequence to form high-concentration brine; a crystallization process: the brine flows into a crystallization pond through an evaporation pond for shallow brine short-term crystallization, and the crystallization process is accelerated by adopting an automatic salt spinning technology; and automatically collecting salt, namely collecting salt crystals in the crystallizing pond by adopting an automation technology, and stacking by adopting an intelligent stacking machine after collection. According to the ecological sea salt manufacturing method, the salt pan structure is reasonable, the production process is scientific, the control system is intelligent, salt collection is mechanized, the sea salt production quality and efficiency can be greatly improved, the production cost is reduced, and good economical efficiency and applicability are achieved.

The present disclosure is provided with water removal and recovery system and method for lithium bis(fluorosulfonyl)imide. Specifically, the purification of lithium bis(fluorosulfonyl)imide crude products is achieved by two-stage thin film evaporators in series, thereby acquiring lithium bis(fluorosulfonyl)imide with sufficiently high purity with a relatively simple structure. The thin film evaporators themselves integrate the evaporation system and the condensation system, which not only simplifies the system configuration of connecting pipelines or tubs, but also lowers resistance and reduces the risk of system leakage. Furthermore, the solvents and water after evaporation can be effectively separated by a water separator, such that the content of organic phase solvents in the separated water is very low, and the content of water in the organic phase solvents is also very low. This allows for the maximum recovery of high-purity solvent for reuse, thereby facilitating the reduction of wastewater treatment costs.

To provide a production apparatus of a mixed gas of a film deposition raw material capable of vaporizing a film deposition raw material more certainly, and a film deposition apparatus.SOLUTION: A production apparatus of a mixed gas of a film deposition raw material according to an aspect of the present invention includes a film deposition raw material supply unit 11 for supplying a film deposition raw material liquid R1 at a specified flow rate, a carrier gas supply unit 12 for supplying a carrier gas C at a specified flow rate, a main vaporization unit 13 for vaporizing the film deposition raw material by heating the film deposition raw material supplied from the film deposition raw material supply unit and the carrier gas supplied from the carrier gas supply unit, and an auxiliary vaporization unit 14 having a porous vaporization member 141 for capturing droplets of the film deposition raw material carried over into a gas flowing out of the main vaporization unit and vaporizing the captured droplets of the film deposition raw material.SELECTED DRAWING: Figure 1

Embodiments relate to a urea plant and operation of the urea plant in a low load mode. In an embodiment, two evaporators connected in parallel to a finish machining section and a melamine plant, respectively, are used.