493 results about "Triple effect" patented technology

The invention discloses a method and device for utilizing sewage containing ammonia and sodium. The method comprises the steps of deamination reaction, denitrification reaction, gas-liquid separation, triple-effect multistage evaporation, evaprative crystallization and freezing crystallization, electrodialysis and sodium filteration membrane, and concentration of reverse osmosis membrane, so that distilled water and membrane deion pure water are recovered, and the resource utilization of sole sodium chloride and sodium sulfate is realized.

The invention relates to a process method for recovering ammonium chloride and sodium chloride from waste water containing the ammonium chloride and the sodium chloride, which produces the ammonium chloride and the sodium chloride by using mother solution which is generated in a process for producing sodium bicarbonate by natural bittern double decomposition reaction and contains the ammonium chloride and the sodium chloride as raw materials. The method adopts ammonium still, evaporation, crystallization and separation process to treat, wherein the evaporation adopts multiple-effect, a heat pump and a vacuum evaporation process, and selects a falling film evaporator and a forced circulation type evaporator to perform triple-effect mixed-flow procedure, so that sodium chloride is crystallized and separated in the evaporation; and the ammonium chloride is crystallized and separated by cooling after the evaporation. The method effectively reduces the operation temperature of the equipment, can repeatedly use secondary steam and condensed water, reduces erosion of the ammonium chloride solution to the equipment, saves the energy, reduces the cost, improves the production efficiency, and reduces environmental pollution.

The present invention provides a method for comprehensively treating high salt content organic industrial wastewater, and relates to the field of the organic material preparing technique. The method of the invention mainly comprises the following steps: executing acid-alkali adjustment to the organic wastewater until pH=7-9, preheating to 30-60 DEG C; introducing the wastewater into a triple effect evaporator for executing triple effect evaporation, executing salting out to the evaporated wastewater which is condensed to a certain degree so that the solid and liquid are separated; separating the concentrated liquid for continuing the condensation; when the separated liquid satisfies a certain requirement, atomizing into an incinerator for incinerating and discharging according to the standard, and introducing the triple effect evaporation condensation water into a biochemical treating system. The method of the invention can totally dispose and remove the organic matter in the high salt content organic industrial wastewater so that the high salt content organic industrial wastewater can be charged according to the standard. The method of the invention has the advantages of unique method, simple technical process, easy operation, low operation cost, large treating capacity, low regeneration energy consumption, no easy forming of secondary pollution after abandon, better economic and social benefit, and wide application range. The method of the invention can be widely applied for the treating of the high salt content organic wastewaters of garbage penetrating fluid, dye intermediate wastewater, etc.

The invention discloses a wastewater evaporation concentration process and a wastewater evaporation concentration device system. The process comprises the following steps of: delivering softened wastewater to be treated to a mechanical vapor recompression (MVR) system to perform evaporation and concentration, compressing the generated secondary steam and then delivering the compressed steam to an evaporator to recycle, delivering the concentrate to a triple-effect mixed flow forced circulating evaporation crystallization system to perform evaporation and crystallization, performing solid-liquid centrifugal separation on the crystallized concentrate and crystal grains, returning the separated mother solution to a stock solution tank or continuously performing evaporation and crystallization, and reclaiming the separated crystal, wherein the secondary steam generated by evaporation and crystallization is recycled for the evaporation crystallization system. After the wastewater is evaporated and concentrated by adopting the process of mechanical vapor recompression circulating evaporation and triple-effect mixed flow forced circulating evaporation crystallization, the wastewater does not need to be discharged to the ground water area, and the wastewater is discharged in a form of steam or closed and embedded in a form of sludge or the like, so the purpose of zero discharge of the wastewater can be fulfilled; and the process system has high heat efficiency, low energy consumption, energy conservation, great reduction in running cost, low temperature difference, low corrosion, difficult scale formation and long equipment service life.

The invention discloses a wastewater evaporating process and device system. The wastewater evaporating process comprises the following steps: the wastewater to be treated firstly enters a pretreatment softening system for softening treatment and secondly enters a mechanical vapor recompression (MVR) system for evaporation concentration; the generated secondary steam is compressed and enters an evaporator for recycling; the concentrated solution enters a triple effect flow-mixing forced circulation evaporation and crystallization system for evaporation and crystallization; the generated secondary steam is reused by the evaporation and crystallization system; the concentrated solution and crystalline grains obtained through crystallization are subject to solid-liquid centrifugal separation; the separated mother solution is sent back to a raw liquor tank or evaporated continuously for crystallization; and the separated crystals enter a centrifugal drying and packaging system for weighting and packaging. After the process disclosed by the invention is adopted to soften, evaporate and crystallize wastewater and dry and package the obtained crystals, wastewater is not discharged to the water bodies of the surface of earth and the aim of zero wastewater discharge can be realized; the process system is low-carbon and environmentally friendly; the material can be recycled, the thermal efficiency is high, the energy consumption is low, the energy can be saved, the operating cost can be greatly reduced, the range of temperature is small, the corrosion is low and the service life of the equipment is long, and the scaling has small possibility of occurrence.

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.

A pretreatment method for glyphosate industrial waste water relates to the technical field of the treatment method for the industrial waste water from pesticides. The invention provides the pretreatment method for the glyphosate industrial waste water, which can remove glyphosate, sodium chloride and reduce COD cr value. The pretreatment method can effectively remove the vast majority of sodium chloride and glyphosate in the glyphosate industrial waste water by adopting steps such as adjusting Ph value, catalytic oxidation, calcification phosphorus removal, triple effect evaporation crystallized sodium chloride removal and the like, and greatly reduces COD cr value; the pretreated waste water can be discharged into a follow-up biochemical treatment system for biochemical treatment, thus causing waste water to be discharged after reaching standards, being beneficial to the protection of the environment and having good social benefits.

The invention provides an energy utilization system of organic wastes with zero emission of carbon dioxide, which organically combines anaerobic fermentation hydrogen production, methane fermentation, CO2 absorption, microalgae fixation CO2, biogas liquid treatment and energy grass planting. The system is suitable for treating various types of organic wastes, can be applied to the treatment of agricultural organic wastes, industrial organic wastes, domestic organic wastes, slurry and the like, and the industries, such as new energy development. Through the application of the invention, the specific application demonstration of recycling economy can be carried out, clean energy is obtained while eliminating environmental pollution, no greenhouse gas emits in the process, and the triple effects of wastes treatment, production of clean and renewable energy sources and reduction of carbon dioxide emission can be realized.

The invention relates to a waste acid concentration multistage treatment method which comprises the following steps of: heating 20-22% waste acid by a preheater, evaporating by a one-effect evaporation heater and a double-effect evaporation heater, cooling by a cooler and crystallizing by a crystallizer; heating by a triple-effect evaporation heater and separating by a separator to obtain 65% concentrated acid. The secondary steam part is used as a heat source part of the next stage heater and is condensed by spraying cooling water, wherein the one-effect evaporation heater and the double-effect evaporation heater are falling film graphite tube array evaporation heaters; the triple-effect evaporation heater is a floating head tube array graphite heat exchange. The water evaporation capability of the method is increased from 2.5 tons to 10 tons, and the stage number is 3 or more. A large amount of steam and cooling water is saved, and the pollution to the environment is reduced. The heat exchange area of equipment is reduced by 30%, and materials are saved and manufacturing cost is reduced correspondingly. The heat of steam is fully utilized, more than 35% of steam is saved, and more than 30% of cooling water can be saved. The condensed water part of the steam is used as the hear source part of the preheater and is recycled for other uses.

The invention relates to a low-temperature deabsorption repairing process used for polluted soil, comprising three stages, namely polluted soil preparation stage, low-temperature deabsorption stage and tail gas treatment stage. In the polluted soil preparation stage, after being conveyed to a low-temperature deabsorption workshop, the polluted soil are processed into a plurality of elongated soilstacks by virtue of equipment; in the low-temperature deabsorption stage, the soil stacks are intermittently turned over by soil turning equipment to volatilize pollutants in the soil and the turned soil is detected regularly; and in the tail gas treatment stage, gas carrying the pollutants after volatilization are led out by a centrifugal exhaust fan, and the gas is dedusted by a cloth bag and absorbed by triple-effect activated carbon absorption so as to realize the clean discharge of the tail gas. In the invention, based on the characteristic that the pollutants in the soil are easy to volatilize at normal temperature, the soil is turned over to volatilize the pollutants; enforced drawing ventilation is carried out on air in an airtight workshop, the gas carrying the pollutants is dedusted and absorbed by activated carbon, and finally the pollutants in the soil are removed by deabsorption, thus effective repairing of the polluted soil is realized.

The invention relates to a method for synergistic treatment and harmless cyclic utilization of refuse fly ash by using a cement kiln. The method for synergistic treatment and harmless cyclic utilization of refuse fly ash by using thecement kiln comprises a three-stage washing desalination technology, a technology of removing heavy metals by coagulation and sedimentation, a membrane distillation concentration technology, a technology of removing slight trace carnallite and a triple-effect evaporation crystallization technology, wherein the three-stage washing desalination technology can remove heavy metals and chloride ions in the fly ash, and the fly ash which contains water and dioxin and the fly ash which contains less than 1% of chlorine ions enter the cement kiln and are incinerated at the temperature of above 1400 DEG C to turn into cement raw materials, and the dioxin is split at the temperature of above 800 DEG C; the technology of removing the heavy metals by coagulation and sedimentation can remove multiple metal ions in the fly ash, and precipitates are dried in advance and then enter the cement kiln to be incinerated; the membrane distillation concentration technology can remove the rest of chloride ions in a solution, and generated distilled water can be recycled; the technology of removing the slight trace carnallite can remove the slight trace carnallite, and heat energy can be recycled; and the triple-effect evaporation crystallization technologyevaporates and separates high salt content concentrated liquid to obtain industrial salt which is used for a paper making technology, snow-melting agents and chloro-alkali industries.

The invention discloses a production method and a device for sodium gluconate energy-saving triple effect concentration and crystallization. The continuity of sodium gluconate concentration and crystallization can be realized, that is, a raw material liquid enters a preheater continuously; the moisture can be evaporated after passing through 1st, 2nd and 3rd effect heating evaporators and 1st, 2nd and 3rd effect separators; the 2nd steam is separated continuously to heat and evaporate materials in the 1st, the 2nd and the 3rd effect heating evaporators; the crystal of sodium gluconate is separated out in the 3rd effect heating evaporator and pumped out continuously; therefore, the process of feeding, concentration and crystallization, and crystal separation at the same time is formed continuously, the 2nd steam is fully utilized, the steam consumption for evaporating moisture is 0.28 Tsteam/Twater, the crystallization rate achieves 65%, and materials can form a large amount of crystal in the 3rd effect heating evaporator. The invention can improve the productivity, reduce the steam consumption and improve the quality of products.

The invention provides a high-concentration ammonia nitrogen wastewater treatment system and treatment method. The treatment system comprises a pretreating and regulating unit, a triple-effect evaporation unit, a rectifying and ammonia distilling unit and a film scraper evaporation unit; the pretreating and regulating unit is used for receiving high-concentration ammonia nitrogen wastewater and regulating the pH value of the high-concentration ammonia nitrogen wastewater to be alkaline; the triple-effect evaporation unit is used for evaporating the alkalized high-concentration ammonia nitrogen wastewater into desalted high-concentration ammonia-containing wastewater and low-ammonia-nitrogen high-salinity wastewater; the rectifying and ammonia distilling unit is used for conducting rectifying and ammonia distilling on the desalted high-concentration ammonia-containing wastewater to generate ammonium hydroxide and low-ammonia-nitrogen tail water capable of being biochemically treated; the film scraper evaporation unit is used for evaporating the low-ammonia-nitrogen high-salinity wastewater into low-ammonia-nitrogen tail water capable of being biochemically treated and high-concentration saline water. According to the wastewater treatment system, after the high-concentration ammonia nitrogen wastewater is subjected to efficient evaporation, rectifying and ammonia distilling and film scraper evaporation desalting, the ammonia recovery efficiency can reach 95% or above, ammonium hydroxide can be effectively recovered to increase the economic benefit, and inorganic salt components in the wastewater are removed; by adopting an efficient evaporation device, heat energy is effectively saved, and the energy utilization efficiency is improved.

The invention discloses a process for preparing a calcium chloride solution by utilizing ammonia soda filtration mother liquor and relates to the field of the production method of calcium chloride. The process comprises the following steps: distilling the filtration mother liquor to obtain mother liquor without ammonia, performing triple effect evaporation and separation to the obtained mother liquor to obtain an ammonium chloride saturated solution, then using the ammonium chloride saturated solution to react with lime powder in a reactor and generate a calcium chloride solution, and finally purifying the calcium chloride solution to prepare the finished product-calcium chloride solution. By adopting the process, the soda-calcium production can be realized under the premise of ensuring the recovery and recycling of ammonia and carbon dioxide and the content of the calcium chloride solution is more than 30wt%.

The invention provides a double-effect and triple-effect first-type absorption heat pump with a heat return end and a heat supply end, which belongs to the technical field of absorption heat pumps. A second absorber is sequentially communicated with a second solution pump, a third solution heat exchanger, a first absorber, a first solution pump, a second solution heat exchanger, a first solution heat exchanger and a first generator, the first generator is further sequentially communicated with the first solution heat exchanger, a second generator, the second solution heat exchanger, a third generator, the third solution heat exchanger and a second absorber, the first generator is provided with a steam channel used for communicating with the second generator and the third generator, the second generator is communicated with a condenser via a first throttling valve, the third generator is communicated with the condenser via a second throttling valve, the second generator is provided with a steam channel used for communicating with the condenser, the third generator is provided with a steam channel used for communicating with the first absorber, the condenser is communicated with an evaporator via a third throttling valve, and the evaporator is provided with a steam channel used for communicating with the second absorber, so that the double-effect first-type absorption heat pump with the heat return end and the heat supply end is formed.

A triple-effect distillation and recovery method for wet synthetic leather dimethylformamide(DMF) solution includes: feeding, preheating, condensing and separating it by a concentration tower and a distillation tower to output it to complete the recovery process, in which, low-pressured steam is the heating media, using decompressed concentration for step I, atmospheric concentration for level II and vacuum distillation, the decompressed concentration processes in the packing tower, atmospheric concentration processes in the plate column, decompressed concentration processes in the combined packing and plate column. In the described cycle process, energy can be recycled between the steam in the top, heating at the bottom, feed preheating, preheating of finished condensation, distillation, reboilling processes.

The invention relates to a garbage percolate treatment method. Garbage percolate is subjected to homogenization, a two-phase anaerobic biochemical system, a triple-effect enhanced biotreatment system and advanced treatment, a plurality of pollution elements can be removed with high efficiency by effectively aiming at the characteristics of high organic matter and ammonia nitrogen content in the garbage percolate in each step, and the effluent index is greatly superior to the standard in China. The garbage percolate treatment method has strong impact resistance capacity, can adapt to changes of water quality and water quantity of the garbage percolate in different seasons and different stages (a primary stage, a middle stage and an aged stage), prolongs the service life and the lifetime of the systems and reduces the treatment cost of the garbage percolate.

The invention discloses a desulfurization wastewater concentration, evaporation, crystallization, and salt separation process. The process comprises the steps as follows: introducing raw water into a quadruple-effect counter-flow forced circulation evaporator, treating sodium sulfate through evaporating, concentrating and crystalizing, separating sodium sulfate first, and freezing separated mother liquor, wherein most of sodium sulfate in the mother liquor is successfully separated; introducing the frozen mother liquor into a triple-effect evaporator after preheating, evaporating, concentrating and crystalizing sodium chloride, wherein the obtained crystal salt is used as an industrial raw material; introducing the mother liquor produced by a sodium chloride evaporator into a single-effect evaporator to obtain an abraum salt crystal. The process successfully separates the sodium sulfate in the desulfurization wastewater, and the sodium chloride is treated through evaporating, concentrating and crystalizing, the obtained sodium chloride crystal salt is used as the industrial raw material, the mother liquor produced by the sodium chloride evaporator enters the single-effect evaporator to obtain the abraum salt crystal, so that the sodium sulfate and the sodium chloride are effectively separated.

The invention relates to a method for recycling and treating the salt water of pickled krault and is realized by the following steps: after the salt water is coarsely and then finely filtered, the residue is dried and used as boiler fuel, the filtrate enters into triple effect concentration, the saturated salt solution of the condensed juice is pumped into a crystallizer for crystallization, and salt is obtained after centrifugal separation, and the liquid after centrifugation is hydrolyzed, discolored, deodorized, filtered, prepared, filled and sterilized to obtain vegetable amino acid. The invention has simple operation and no regeneration of waste, the recycled residue can be used as the boiler fuel, the salt and the vegetable amino acid can be used as food and chemical fuel, thus eliminating the pollution of the salt water of pickled krault to environment.

The invention discloses a solvent recovery method of Lyocell fibers, comprising the following steps: processing collected Lyocell fibers into a washing liquor, introducing the washing liquor to a decolouring groove, using active carbon powder to decolor through suspension, then removing the active carbon and impurities from the decolored washing liquor by a two-stage filtration containing prefiltration and ultrafiltration, removing the water from the washing liquor by one of the following two methods: mechanical vapor recompression condensation method and triple effect evaporation vapor condensation method, so as to obtain a recovered solution with the solvent concentration which coincides with fiber processing. Because the recovery process is simple, the devices used in conjunction with the process are not complicate, easy to access, and suitable for using in the recovery of a large amount of low concentration washing liquor, so that the invention has competitive recovery cost, recovery efficiency and quality of the recovered solution, and has practicability and environmental nature.

The invention relates to a method for extracting tea saponin from camellia seed meal, comprising the following steps of: crushing camellia seed meal into powder with the particle size of 100-200 meshes, packaging into cloth bags and sealing the openings; putting the cloth bags with the camellia seed meal into a batch extractor which is provided with a filter screen at the position of a conical opening of a conical tank bottom and connected with a condenser; injecting hydrous ethanol into the batch extractor according to the mass ratio of the camellia seed meal powder to the ethanol of 1:8-10, raising the temperature to 80-90 DEG C to enable the ethanol to back flow, extracting tea saponin in the states of stirring and ethanol reflux for 3-4h to obtain a tea saponin extract; pumping the extract out from the batch extractor, injecting into a concentration tank and carrying out the triple-effect concentration to obtain tea saponin rough products with the tea saponin yield of about 20 percent. With the method, the problem of plugging in the procedure of separating the tea saponin extract can be solved; and the method can improve the yield of the tea saponin, save the filter procedure and simplify the process.

The invention relates to the field of the fume wet-type magnesia desulfated waste-liquid recovery of boilers and sinter machines, and the like, in particular to a fume wet-type magnesia desulfated waste-liquid recovery method which adopts flash-evaporating concentration for processing a magnesium sulfate solution, the steps are as follows: the first-effect concentrating step of the magnesium solution, using positive-pressure operation and using fresh vapor as a heat resource, and concentrating the magnesium sulfate solution to 20 percent to 25 percent; the second-effect step of the magnesium sulfate solution, heating the solution by using secondary vapor generated in the first-effect evaporation until the concentration of the magnesium sulfate solution reaches 30 percent to 35 percent; the triple-effect concentrating step of the magnesium solution, heating by triple vapor generated in the second-effect concentrating step by adopting an atmosphere condenser and an evacuator so that the triple-effect concentrating step is operated in a vacuum state, and concentrating the magnesium sulfate solution to the set concentration to form a super-saturation solution in the thrice-effect concentrating step of the magnesium solution; the crystallizing step of magnesium sulfate: conveying the super-saturation solution to a crystallizer to enable the magnesium sulfate to form the crystal of magnesium sulfate heptahydrate to be continuously separated out; and the recovery step of the magnesium sulfate heptahydrate. The invention can generate hydrous magnesium sulfate and achieve high recovery rate.

The invention relates to the technical field of wastewater treatment, in particular to a system and method for treating wastewater containing sodium chloride. The system for treating wastewater containing sodium chloride comprises a crystallization centrifugal separation system and is characterized in that the crystallization centrifugal separation system comprises a hydrocyclone, a thickener and a centrifugal machine which are sequentially connected, wherein the hydrocyclone is connected with a triple effect evaporation device used for concentrating wastewater containing the sodium chloride. The system has the beneficial effects of realizing zero emission of the wastewater, reducing negative effects of salt-containing wastewater emission on local surface water body and agricultural production, recycling a large quantity of steam condensate and sodium chloride, realizing win-win targets of economic benefit and environmental protection benefit, reducing consumption of live steam and lowering operation cost, and has a wider application prospect in the high-salinity wastewater treatment project.

The invention relates to an outer drying steam triple-effect heat exchange system. A flow divider is arranged in the liquid phase space of a water-bath-type saturated steam generator, and a steam discharge pipeline of the flow dividier is sequentially provided with a steam water separator and a steam drying heat exchanger; overheated steam enters the flow divider through a pressure control valve; wet saturated steam from the saturated steam generator is heated into dry saturated steam by overheated steam; the dry saturated steam enters a main steam heat exchanger and becomes high-temperature condensation water after materials are heated for the third time; flash steam of the high-temperature condensation water heats the materials in the flash steam heat exchanger for the second time; condensed flash steam enters the condensation water heat exchanger; the condensation water in the high-temperature condensation water continuously releases sensible heat to heat the material for the first time; the condensation water after temperature reduction enters a water collecting tank, and is pumped into the saturated steam generator by a water supplying pump; and the aperture of the pressure control valve is regulated by a PLC (programmed logic controller) according to the material outlet temperature. The system achieves cascading utilization of steam heat energy, guarantees that the steam heat energy can be used up, and improves the energy efficiency.

The invention discloses a preparation method of salted vegetable concentrated liquid, comprising the following steps of: collecting fermented and ripened salted vegetable fermentation liquid into a regulating settling tank, carrying out coarse filtration by a bottom filter screen of the regulating settling tank, and carrying out primary clarification on the salted vegetable fermentation liquid; feeding the coarsely filtered fermentation liquid into a triple-effect evaporation device, and heating and evaporating at the conditions that the vacuum degree is 0.08MPa and the boiling point is 50-55 DEG C; feeding the treated salted vegetable fermentation liquid into a double-effect evaporation device, and heating and evaporating at the conditions that the vacuum degree is 0.06MPa and the boiling point is 80-85 DEG C; feeding the treated salted vegetable fermentation liquid into an activated carbon and kieselguhr filtering device, and carrying out decoloration and foreign taste removal treatment on the salted vegetable fermentation liquid; and feeding the decolored clear liquid the foreign taste of which is removed into a single-effect evaporation device, and heating and evaporating at the conditions that the vacuum degree is 0.04MPa and the boiling point is 90-95 DEG C to prepare the required salted vegetable concentrated liquid. The invention has low production cost and realizes the recycle of the salted vegetable concentrated liquid.

A method of using a triple-effect absorption system to recover methane from landfill gas contaminated with CO₂ and trace contaminates such as chlorinated hydrocarbons and aromatics involves processing the landfill gas with three absorbers and a flash system. One absorber uses a solvent to absorb the trace contaminants from the landfill gas, the second absorber in conjunction with the flash system extracts CO₂ from the gas, and just a first portion of that CO₂ is used for stripping the trace contaminates from the solvent in the third absorber. The rest of the extracted CO₂ is vented to atmosphere to prevent dampening the combustion of the trace contaminants absorbed by the first portion of CO₂.

The invention relates to a method for preparing azeotropic ethanol through three-tower triple-effect differential pressure heat integration and mainly solves the problem of high energy consumption in the prior art. The method is realized in the following heating modes that: a first reboiler in the kettle of a rough distillation tower is heated by absolute ethanol gas 21 from a molecular sieve dehydration unit; a second reboiler in the kettle of the rough distillation tower is heated by a material fluid 7 from the top of a rectifying tower I; flash vapor 15 from a flash evaporation tank 13 andflash vapor 17 from a flash evaporation tank 14 enter the rough distillation tower to directly heat the rough distillation tower; a reboiler in the kettle of a rectifying tower is heated by a material fluid 10 from the top of a rectifying tower II; and a reboiler in the kettle of the rectifying tower II is heated by primary vapor 19 from the outside. By the technical scheme, the problem is preferably solved; and the method can be applied to an industrial production process for preparing the azeotropic ethanol through three-tower triple-effect differential pressure distillation.

The invention belongs to a fruit tree yellowing disease preventing and treating comprehensive preparation in fruit tree fertilizers. The preparation comprises (1) a foliage spray micro element fertilizer comprising the following components in percentage by weight: 18-22% of sequestration iron, 13-17% of magnesium, 13-17% of boron, 18-22% of zinc, 9-11% of silicon, 9-11% of selenium, 9-11% of kalium, 0.02% of endogenous hormone and 0.02% of gibberellin, total being 100%, and adding 500-700 times of water for foliage spray; (2) a root-irrigation conditioner comprising the following components in percentage by weight: 11-14% of sequestration iron, 45-55% of citric acid, 2-3% of soil conditioner, 30-40% of nitrogen, phosphorus and potash fertilizers which are same in amount, and trace of protease, total being 100%; and adding 40-60 times of water for the root-irrigation; and (3) a stem-coating nutritional agent comprising the following components in percentage by weight: 18-22% of sequestration iron, 0.1-0.3% of humic acid, 0.1-0.3% of fulvic acid, trace of aspartic acid and threonine and the balance of soft water penetrating agent, total being 100%; and adding 10-20 times of water for stem-coating. After kiwi fruit flowers, before a fruit expanding period (the first-ten and middle ten days of June), the foliage spray micro element fertilizer (the sequestration iron and multiple micro element nutrient solution) can be sprayed on leaves, meanwhile the conditioner (multiple nutrients and enzyme compounds and endogenous root-generating healing agents) is performed. A leaf fast green comprehensive preventing and treating preparation is coated on stems for the serious fruits. Triple effect is united as one, and the purpose of curing the yellowing disease is achieved.