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2775 results about "Reboiler" patented technology

Reboilers are heat exchangers typically used to provide heat to the bottom of industrial distillation columns. They boil the liquid from the bottom of a distillation column to generate vapors which are returned to the column to drive the distillation separation. The heat supplied to the column by the reboiler at the bottom of the column is removed by the condenser at the top of the column.

Hydrocarbon gas processing

A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. In recent years, the preferred method of separating a hydrocarbon gas stream generally includes supplying at least portions of the gas stream to a fractionation tower having at least one reboiler, and often one or more side reboilers, to supply heat to the column by withdrawing and heating some of the tower liquids to produce stripping vapors that separate the more volatile components from the desired components. The reboiler and side reboilers (if any) are typically integrated into the feed stream cooling scheme to provide at least a portion of the refrigeration needed to condense the desired components for subsequent fractionation in the distillation column. In the process disclosed, the tower reboiling scheme is modified to use one or more tower liquid distillation streams from a point higher in the column than is used in the conventional reboiling scheme, providing colder stream(s) for the reboiler(s) that allow more effective cooling of the feed streams and thereby improve the efficiency with which the desired components are recovered. In addition, the tower liquid streams withdrawn from a higher point in the column contain larger quantities of the more volatile components, which when vaporized provide better stripping of undesirable components like carbon dioxide without reducing the recovery of the desired components. The heated distillation stream is returned to a lower point on the fractionation tower that is separated from the withdrawal point by at least one theoretical stage.
Owner:UOP LLC

Hydrocarbon gas processing

A process for the recovery of ethane, ethylene, propane, propylene and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. In recent years, the preferred method of separating a hydrocarbon gas stream generally includes supplying at least portions of the gas stream to a fractionation tower having at least one reboiler, and often one or more side reboilers, to supply heat to the column by withdrawing and heating some of the tower liquids to produce stripping vapors that separate the more volatile components from the desired components. The reboiler and side reboilers (if any) are typically integrated into the feed stream cooling scheme to provide at least a portion of the refrigeration needed to condense the desired components for subsequent fractionation in the distillation column. In the process disclosed, the tower reboiling scheme is modified to use one or more tower liquid distillation streams from a point higher in the column than is used in the conventional reboiling scheme, providing colder stream(s) for the reboiler(s) that allow more effective cooling of the feed streams and thereby improve the efficiency with which the desired components are recovered. In addition, the tower liquid streams withdrawn from a higher point in the column contain larger quantities of the more volatile components, which when vaporized provide better stripping of undesirable components like carbon dioxide without reducing the recovery of the desired components. The heated distillation stream is returned to a lower point on the fractionation tower that is separated from the withdrawal point by at least one theoretical stage.
Owner:UOP LLC

MVR (Mechanical Vapor Recompression) vapor-stripping deamination system and application method thereof

The invention relates to an MVR vapor-stripping deamination system. The MVR (Mechanical Vapor Recompression) vapor-stripping deamination system comprises a vapor-stripping deamination tower, an ammonia water rectification tower and a condenser, wherein a high-ammonia-nitrogen sewage input pipe, a vapor input pipe I, a post-deamination waste water discharge port and an ammonia-containing vapor discharge port I are arranged on the vapor-stripping deamination tower; the vapor-stripping deamination tower is connected with a reboiler; the high-ammonia-nitrogen sewage input pipe is connected with waste water feed preheaters (II and I); the post-deamination waste water discharge port is connected with the waste water feed preheater I and an axial flow pump respectively; the ammonia-containing vapor discharge port I is connected with the reboiler through a mechanical vapor compressor; the reboiler is connected with a dilute ammonia water storage tank connected with the ammonia water rectification tower; a discharge port, an ammonia-containing vapor discharge port II and a vapor input pipe are arranged on the ammonia water rectification tower; the discharge port is connected with a rectification tower kettle discharge pump and the waste water feed preheater II; the ammonia-containing vapor discharge port II is connected with the condenser; a strong ammonia water discharge port is connected with a strong ammonia water storage tank connected with the ammonia water rectification tower. Meanwhile, the invention further discloses an application method of the MVR vapor-stripping deamination system. The MVR vapor-stripping deamination system has the advantages of less investment, high feasibility and high comprehensive utilization ration.
Owner:TIANHUA INST OF CHEM MACHINERY & AUTOMATION

Desulphurization method of amine liquid with high removal rate of hydrogen sulfide and special equipment

The invention discloses an amine liquid desulphurization method with high hydrogen sulphide removal rate and a special device. A regeneration tower is divided into an upper section and a lower section; by a third pipeline which is provided with a third pump and is added between the middle part of an absorption tower and the outlet of the upper section of the regeneration tower, and a fourth pipeline by which the outlet of the regeneration third pump and the inlet of the lower section of the regeneration tower are communicated with each other, two-step absorption and two-step regeneration are carried out by using solvents with different hydrogen sulphide contents, a small part of solvent with little hydrogen sulphide is used as absorbent of final-step, therefore, the solvent quantity which achieves the low content of hydrogen sulphide is little, thus the steam dosage is reduced, the reboiler steam is saved by about 30 percent, the operation energy consumption is greatly reduced and the desulphurization expense is reduced further; meanwhile, the content of the hydrogen sulphide in the processing gas purified by the invention can achieve less than 50ppmv; therefore, the absorption effect is good and the hydrogen sulphide removal rate is high.
Owner:ZHENHAI PETROCHEMICAL ENG CO LTD

Low-pressure ethanol recovery device and method with triple effect rectification

The invention discloses a low-pressure ethanol recovery device and method with triple effect rectification. The low-pressure ethanol recovery device with triple effect rectification comprises a first rectifying tower, a second rectifying tower, a third rectifying tower, a rectifying tower reboiler, a rectifying tower feed preheater, a condenser, a return tank, a dilute ethanol feed preheater, a temporary finished product storage tank and a finished product cooler. In the ethanol recovery method with triple effect rectification, by controlling the recovery of the finished ethanol in the second rectifying tower, the content of ethanol in tower bottom wastewater of the second rectifying tower is 5wt%-30wt%, the temperature of the tower bottom wastewater is 100-120 DEG C, and the working pressure of the third rectifying tower is 250-400kPa. The invention adopts the low-pressure triple effect rectification technique and reduces energy loss in the technical process, thus greatly reducing the energy consumption; and the operating pressure and temperature of the third rectifying tower are greatly reduced, and the requirements on the high temperature resistant and corrosion resistant properties of equipment are reduced, thereby reducing the equipment investment and the maintenance cost.
Owner:GUANGDONG ZHONGKE TIANYUAN NEW ENERGY SCI & TECH

Rectification tower automatic control and optimization method

The invention relates to a method for controlling and optimizing the distillation tower. It controls the distillation tower in dependence on the material balance relation and component balance relation, optimizes the distillation tower by using representative model. Employing the abstraction proportion between the light product on the top of the tower and heavy product in the bottom of the tower (in following, taking the proportion between light and heavy product for abbreviation) as main controlled variable depending on the distillation principle, the material balance and component balance in the distillation tower, controlling the proportion between the light and heavy product, temperature, reflux ratio to realize stable operation by regulating the quantity of reflux and heat load of re-boiler. Simulating the practical course through the technological process simulation software, and training the nerve net model to become the representative model for the course optimization. Optimizing the operation with the representative model by using the analytical data for the raw material and product to realize the product Ka bian optimization, increasing the productivity of product with high value on the condition of guaranteeing the product quality and realizing the device energy saving and consumption reduction.
Owner:TSINGHUA UNIV

Method and system for preparing high purity gas by rectification method

The invention relates to a method and a system for preparing high purity gas by a rectification method. According to the method disclosed by the invention, a target gas raw material is firstly processed by a light component removal tower to remove light component impurities and then is processed by a heavy component removal tower to remove heavy component impurities; obtained purified gas is compressed into compressed gas; the compressed gas is at least divided into two parts which are respectively used as heat sources of a tower kettle reboiler of the light component removal tower and a tower kettle reboiler of the heavy component removal tower; the two parts of compressed gas are condensated into liquid to be converged and stored; the stored liquid is divided into three parts; two parts of the stored liquid are respectively used as a cooling medium of a tower top condenser of the light component removal tower and reflux of the heavy component removal tower after being respectively subjected to throttling expansion; and the third part of the stored liquid is recovered as a product. The system disclosed by the invention comprises the light component removal tower, the tower top condenser of the light component removal tower, the heavy component removal tower, a compressor, the tower kettle reboiler of the light component removal tower, the tower kettle reboiler of the heavy component removal tower, a liquid storage tank and a connecting pipeline. The method and the system which are disclosed by the invention have the advantages that equipment is simple; energy is saved; the method and the system are flexible to operate and have wide application; the system is easy to maintain; and the method and the system have few requirements on public works.
Owner:北京华宇同方化工科技开发有限公司

Method for producing liquefied natural gas by using coke oven gas

The invention provides a method for producing liquefied natural gas by using coke oven gas. The method comprises the following steps: (1) the coke oven gas is pretreated to remove benzene, naphthalene, tar and HCN (hydrogen cyanide); (2) sulfur is removed; (3) carbon is removed and the coke oven gas is dried; (4) the coke oven gas is led to a first heat exchanger and pre-cooled; (5) the pre-cooled coke oven gas passes through a second heat exchanger, a reboiler at the bottom of a low-temperature rectifying tower and a third heat exchanger in sequence, so that the temperature is lowered step by step; (6) gaseous liquid coming out of the third heat exchanger is led to a gas-liquid separator for gas-liquid separation, then the liquid coming out of the gas-liquid separator enters the low-temperature rectifying tower, and a liquefied natural gas product is acquired at the bottom of the low-temperature rectifying tower; and otherwise, the gaseous liquid coming out of the third heat exchanger is directly led to the low-temperature rectifying tower, and the liquefied natural gas product is acquired at the bottom of the low-temperature rectifying tower. The method for producing the liquefied natural gas by using the coke oven gas as raw material has the advantages of high output as well as low energy consumption and cost, and is easy to operate.
Owner:BEIJING ZHONGKE RUIAO ENERGY TECH CO LTD

A kind of energy-saving method for recovery and treatment of phenol ammonia wastewater

The invention relates to a method for treating wastewater containing phenol and ammonia, in particular to an energy-saving process for recycling the wastewater containing the phenol and the ammonia. Equipment among an acid removing tower, an ammonia removing tower and a water tower is coupled, namely a crude ammonia condenser on the top of the ammonia removing tower is taken as a reboiler of the acid removing tower and the water tower; and a differential pressure rectification technology is utilized, so that the step comprehensive utilization of a heat resource is realized, the energy consumption of wastewater treatment is reduced, and the using amount of steam and circulating water is greatly saved; particularly the equipment is coupled, the differential pressure rectification technologyis utilized and the ammonia and the phenol in the coal gasification wastewater are recycled simultaneously, so that the aims of saving energy and reducing emission in the wastewater treatment and recycling process are fulfilled. The technical problem that the energy consumption is high when the wastewater containing the phenol and the ammonia is recycled in the coal gasification process is solved; and the comprehensive utilization of energy is realized, and the method is high in social value and economic value.
Owner:TIANJIN HAOYONG CHEM TECH

Trichlorosilane three-tower differential pressure coupling energy-saving rectifying and purifying system and operating method

The invention relates to a trichlorosilane three-tower differential pressure coupling energy-saving rectifying and purifying system and an operating method. The trichlorosilane three-tower differential pressure coupling energy-saving rectifying and purifying system comprises a primary tower, a secondary tower and a tertiary tower; the three towers are connected in series from low pressure to highpressure or from high pressure to low pressure, and a condensation re-boiler is arranged between the primary tower and the secondary tower and between the secondary tower and the tertiary tower respectively; and the three towers can be used for light removal, heavy removal and light removal in turn, and also can be used for combining light removal, heavy removal and light removal. According to the characteristics of approach full tower composition and approach temperature in the process of rectifying the trichlorosilane, the invention provides a trichlorosilane differential pressure coupling rectifying process which is expected to greatly reduce the production cost and energy consumption and theoretically rectify and save energy by nearly 70 percent. The technology remarkably improves themarket competitiveness of polycrystal silicon materials and promotes the development of a photovoltaic and information material industry chain.
Owner:TIANJIN UNIV
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