80results about How to "Reduce tower diameter" patented technology

The invention relates to a multi-effect rectifying process of methanol, which belongs to the technical field of separation and purification of chemical products. In the process, a crude methanol raw material of coal-to-methanol is rectified by a pre-rectifying tower, a pressurizing tower I, a pressurizing tower II, an atmospheric tower and a recovery tower in turn at appropriate temperature and pressure so as to obtain a high-purity refined methanol product according with quality requirements. In the flow, methanol steam on the top of the pressurizing tower I is used for providing heat for a reboiler at the bottom of the pressurizing tower II, the methanol steam on the top of the pressurizing tower II is used for providing heat for a reboiler at the bottom of the atmospheric tower, and the pressurizing tower I, the pressurizing tower II and the atmospheric tower form multi-effect rectification; and simultaneously, the methanol steam on the top of the recovery tower is used for providing heat for a reboiler at the bottom of the pre-rectifying tower, and the recovery tower and the pre-rectifying tower form double-effect rectification. The invention provides an energy-saving methanol multi-effect rectifying process method which has the advantages of greatly reduced energy consumption, more stable production process, more easily controlled product quality, higher methanol recovery rate and basically equivalent investment compared with a three-tower rectifying process.

The invention discloses a method for recycling hydrogen chloride in tail gas of polysilicon production. In the method, tail gas is cooled and condensed, so that most of chlorosilane is liquefied; compressed gas enters a hydrogen chloride absorption tower and absorbed by chlorosilane solution, and hydrogen gas is exhausted from the hydrogen chloride absorption tower and collected; liquid hydrogen-chloride-rich chlorosilane discharged from the bottom of the hydrogen chloride absorption tower is introduced into a hydrogen chloride distillation tower, and chlorosilane solution is discharged form the bottom of the hydrogen chloride distillation tower; and hydrogen chloride containing trace hydrogen gas is exhausted from the top of the hydrogen chloride distillation tower and enters a full condenser on the top of the distillation tower, condensate of the full condenser on the top of the distillation tower enters a return tank of the distillation tower, the trace hydrogen is exhausted from the top of the return tank of the distillation tower and collected, a part of the condensate of the return tank of the distillation tower is introduced into the hydrogen chloride distillation tower and used as return liquid, and the other part of the condensate enters a liquid hydrogen chloride reservoir for storage. The method improves the purity of recycled hydrogen chloride and the storage amount of hydrogen chloride and saves the investment of equipment.

The invention discloses a high efficiency wet-type desulfurization method through ammonia recovery method for oxidation and concentration outside a tower, and a device thereof. The method comprises the following steps: (1) feeding flue gas into the top part of a concentrating tower after dust removal, cooling down and humidifying the flue gas, then feeding the flue gas into a first level venturi section of a desulfurization absorption system to contact atomized ammonia water so as to have the first level absorption reaction, performing the second level and the third level desulfurizations, and discharging the flue gas after the purification; (2) oxidizing the ammonium sulfite solution generated in a desulfurizing tower and then overflowing the ammonium sulfite solution into a mother liquor tank from the top part of an oxidation tank; and (3) pumping the ammonium sulfate solution in the mother liquor tank to the top part of the concentrating tower through a mother liquor pump to perform heat exchange with the high temperature flue gas after atomization so as to form a supersaturated solution containing 3 to 5 percent of crystal, wherein the supersaturated solution flows out of the bottom of the concentrating tower and is pumped into a hydraulic cyclone through a slurry pump to perform the first level solid-liquid separation, and then the clear solution automatically flows into the mother liquor tank; the crystal-liquid mixed solution flowing out of the bottom of the concentrating tower automatically flows into a centrifugal machine to perform the second level solid-liquid separation, and then the clear solution automatically flows into the mother liquor tank; and solid ammonia sulfate is fed into an automatic packaging machine to be packaged and put into storage. The method has simple processes, greatly reduces investment, and can reclaim agricultural level ammonia sulfate and industrial level ammonia sulfate.

The invention discloses a method of separating catechol / hydroquinone in phenol hydroxylation reaction solution, which is characterized in that: phenol and hydrogen peroxide are reacted under catalyst action to produce reaction solution comprising water, phenol, catechol, hydroquinone and tar; vacuum rectification dehydration, de-phenol, catechol separating, hydroquinone separating and tar removing are made upon the reaction solution to prepare the catechol and the hydroquinone product; thermal medium oil independent circulation stepwise condensation / heat mode is adopted for the distillation system separating the catechol and the hydroquinone; vertical sieve plate is adopted for stripping section of the distillation tower; high-efficiency structured packing is adopted for the distillation section; embedded type structure in the tower is adopted for the condenser and the reboiler of the distillation tower. The method of separating catechol / hydroquinone in phenol hydroxylation reaction solution has the advantages of solving the problems of difficultly liquefying the catechol and the hydroquinone for the condenser at the top part of the distillation tower and easily causing material condensing or gasifying due to small difference value between the boiling point and the freezing point during vacuum rectifying for the catechol and the hydroquinone, prolonging production period, lowering unit consumption of product and reaching more than 99% for product purity of the catechol and the hydroquinone.

The present invention discloses method and apparatus for recovering SO2 from waste gas to produce ammonium sulfate. The present invention has combined process of oxidizing ammonium sulfite into ammonium sulfate and crystallizing ammonium sulfate to simplify structure of desulfurizing tower, lower its height and facilitate use of GRP material. Inside the desulfurizing tower, high temperature fume as material enters from the top, the desulfurized product is exhausted from the bottom, and both the fume and the absorbing liquid flow from top to bottom, resulting in high mass transfer efficiency, simple structure, great fume processing capacity and high eliminating efficiency of harmful SO2, SO3, NOx, HCl, HF and dust. The present invention has high industrial application.

The invention provides a novel radial flow adsorption tower for pressure swing adsorption, and belongs to the technical field of adsorption tower. The novel radial flow adsorption tower comprises an upper seal head, a lower seal head, a tower cylinder body, an isolation drum and a center pipe, wherein the tower cylinder body, the isolation drum and the center pipe are distributed in a concentric circle way; an annular outer passage is formed between the outer drum wall of the isolation drum and the tower cylinder body, and an annular inner passage is formed between the inner drum wall of the isolation drum and the outer wall of the center pipe; a flow distributing pipe and an air exhaust pipe are arranged at the top part of the interior of the adsorption tower, the flow distributing pipe is used for communicating the center pipe and the annular outer passage, and the air exhaust pipe is connected and communicated with the annular inner passage; air flow hole passages are distributed on a drum body of the isolation drum, and an adsorbent is filled into the drum body. The novel radial flow adsorption tower has the advantages that the raw gas is guided into the annular outer passage by the center pipe passage via the flow distributing pipe, flown into the adsorbent layer in the radial way, and sent into the annular inner passage after adsorbing and separating; the gas flows outside the adsorption tower and in the inner passage to form the U-shaped flowing type, so that the change trends of static pressures in the inner passage and the outer passage are basically the same in the axial flowing direction of gas flow, and the uniform distribution of the gas flow is realized.

The invention discloses a crude oil pressure-reduced distillation method and a crude oil pressure-reduced distillation device. A flash tower is arranged between a reduced-pressure furnace and a reduced-pressure distillation tower, an oil transfer line is eliminated, a reduced-pressure distillation raw material is heated in the reduced-pressure furnace and directly enter the flash tower, a small amount of stripping gas is introduced into the flash tower, and the liquid phase, namely flash bottom oil, obtained by gas-liquid separation in the flash tower is introduced into the reduced-pressure distillation tower; and a gas phase, namely flash top gas, discharged from the top of the flash tower is condensed into a liquid phase to be led out of the device. A high-temperature hydrogen or inert gas is introduced into the bottom of the flash tower. When the pressure-reduced distillation method and the pressure-reduced distillation device, in which the flash tower for high-temperature hydrogen or inert gas stripping flash tower is arranged behind the reduced-pressure furnace, are used, the yield of a reduced-pressure fraction oil is increased, the conventional reduced-pressure oil transfer line is not used, the operation load of the reduced-pressure furnace is lowered, and the tower diameter of the reduced-pressure tower can be reduced properly; therefore, equipment investment is reduced, and operation cost is reduced.

The present invention relates to a method and a system for recovering oxysulfide from flue gases, and the recovered products thereof. In the present invention, the process of oxidizing ammonium sulfite to ammonia sulfate and the crystallization process of ammonia sulfate are carried out at the bottom of the oxysulfide absorbing tower, thereby the structure of the oxysulfide absorbing tower is simplified and the height of the oxysulfide absorbing tower is reduced; the flue gases inlet is arranged at the top of the oxysulfide absorbing tower, and the flue gases outlet is arranged at the middle part of the oxysulfide absorbing tower, so that the flue gases with highest temperature is positioned at the top of the oxysulfide absorbing tower, while the flue gases temperature at other parts of the tower is less than 70 DEG C, thereby the oxysulfide absorbing tower is adapted to be integratedly manufactured by fiber glass reinforced plastics material, and excellent corrosion resistance and shorter construction cycle can be realized. The bottom of the oxysulfide absorbing tower is named as crystallization and oxidation reactor; the flue gases and absorbing liquid flow downwards from the top of the tower in a concurrent flow manner inside of the oxysulfide absorbing tower, and the oxysulfide absorbing tower has a simple structure, a large handling capacity, a high sulfur removing efficiency, and has a major industrialization prospect.

The invention discloses a crude oil distillation method. A primary flash distillation tower is arranged between a normal pressure distillation tower and a pressure reduction furnace, a pressure reduction oil line from an outlet of the pressure reduction furnace to a pressure reduction distillation tower is omitted, a secondary flash distillation tower is arranged between the pressure reduction furnace and the pressure reduction distillation tower, tower bottom heavy oil of the normal pressure distillation tower, i.e. normal bottom oil enters the primary flash distillation tower after being mixed with cyclic pressure reduction slag oil, the tower top gas phase of the primary flash distillation tower is converted into a liquid phase to be used as products through heat exchange and condensing, bottom oil of the primary flash distillation tower enters the secondary flash distillation tower through being heated by the pressure reduction furnace, the tower top gas phase of the secondary flash distillation tower is converted into a liquid phase to be used as products through heat exchange and condensing, and bottom oil of the secondary flash distillation tower is introduced into a flash distillation section of the pressure reduction distillation tower for pressure reduction distillation. Compared with the prior art, the method has the advantages that on one hand, the yield of the pressure reduction slag oil is reduced, and the economic benefits of devices are improved; and on the other hand, the load of the pressure reduction furnace and the pressure reduction distillation tower is reduced, the device investment is saved, and the energy consumption of the devices is reduced.

The invention discloses a reduced pressure distillation method with low energy consumption and deep total distillation rate. By arranging a reduced pressure flashing tower behind a reduced pressure heating furnace, light fractions vaporized by heat are separated out, load of a reduced pressure distillation tower is reduced and energy consumption of an apparatus is reduced; by arranging a reduced pressure flashing tank behind the reduced pressure distillation tower, relatively light fractions in reduced pressure residues can be further flashed under a vacuum degree higher than that of the bottom of a reduced pressure distillation tower, yield of reduced pressure distillate oil is increased, and thus a reduced pressure distillation operation with low energy consumption and deep total drawing rate can be realized. With the reduced pressure distillation method, the content of fractions with a temperature lower than 500 DEG C in the reduced pressure residues can be reduced to the minimum, so that the distillation rate of the reduced pressure distillation is increased and economic benefits of the apparatus can be increased.

The invention provides a methane chloride recycling and feeding process and device. The process comprises the following specific steps: removing the vast majority of dust from a methane-chloride-containing gas mixture from the top of a reactor via a dust removal system, and then washing the gas mixture via a dust removal tower to remove high-boiling-point substances and fine powder; after condensing a material on the top of the dust removal tower via a cooling system, taking part of the material as a cleaning solution, and feeding the other part of the material to a refining tower; feeding noncondensable gas in the cooling system to a compressing system; carrying out heat exchange on compressed gas and liquid methane chloride via a vaporizer, vaporizing the liquid methane chloride, coolingand condensing the compressed gas, and then feeding the compressed gas into a condenser for further condensing, carrying out tail gas removal treatment on noncondensable gas in the condenser, and feeding condensate to a buffering tank; enabling the methane chloride of the buffering tank and the methane chloride of a storage tank to enter the refining tower together; and enabling a gas phase on the top of the refining tower to enter a partial condenser for partial condensing, and feeding the condensate into a refluxing tank and totally refluxing the condensate into the refining tower. The methane chloride can be recycled effectively, the main content is higher than 99.5%, moreover, the process is simple, the investment of equipment is low, and energy conservation and consumption reductionare implemented.

The invention discloses a method for extracting 2,6-dimethylphenol from crude phenol and a device applied to the method. A two-stage distillation technology is adopted for the method, primary distillation treatment is performed on crude phenol firstly to remove light components lighter than 2,6-dimethylphenol, the light components are prevented from affecting the effect of follow-up secondary distillation treatment, and product yield and quality of 2,6-dimethylphenol are improved; then secondary distillation treatment under specific operation conditions is performed, especially, the operationpressure of the secondary distillation treatment is controlled to be not higher than 5 KPa, so that on one hand, the relative volatility of 2,6-dimethylphenol and other components in a primary distillation product is improved and high-concentration 2,6-dimethylphenol can be obtained by extraction, on the other hand, 2,6-dimethylphenol cannot have an isomerism change in the distillation processes,and the 2,6-dimethylphenol separation effect is guaranteed. Tests prove that the yield of 2,6-dimethylphenol is as high as 99.98%, and the purity is as high as 99.9%.

The invention provides a light oil and wide fraction separation technology and equipment applicable to tar distillation. The equipment comprises a quench tower, an ammonia water tank, a distillation tower, an oil and water separation tank and a condenser cooler, wherein the quench tower is connected with a feeding port of the distillation tower; an ammonia water outlet of the distillation tower is connected with the ammonia water tank which is connected with the quench tower through an ammonia water pump; a light fraction escape port in the top of the distillation tower is connected with the condenser cooler; the condenser cooler is connected with the oil and water separation tank which is connected with a reflux port of the distillation tower through a light oil reflux pump. Compared with the prior art, the technology and the equipment have beneficial effects as follows: 1), condensing cooling load of the top of a rectifying tower is greatly reduced, and a reflux ratio of the top of the rectifying tower is reduced; 2), heavy components capable of being separated out through cooling are firstly guided into an oil and water separation region at the lower part of the tower through quenching, so that unnecessary circulation of materials in the equipment is reduced; 3), the diameter of the rectifying tower is reduced.