9results 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 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.

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 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.

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 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.

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