38results about How to "Improve evaporation and concentration efficiency" patented technology

The invention discloses a novel heat pump evaporation heat recovery combined device and an efficient effluent concentration method.A suction pump is utilized for sucking effluent into an evaporation tank and spraying the effluent towards filler, hot and dry air exhausted by a heat pump and the sprayed effluent carry out heat exchange, water in the effluent is evaporated, and a concentrated solution obtained in the evaporation tank is circulated through the suction pump and enters the evaporation tank to be evaporated continuously; hot air obtained after heat exchange is sent back to the heat pump from the top of the evaporation tank, subjected to heat recovery through a heat recovery device in the heat pump and then passes through an evaporator to obtain condensate water and first cooling gas; before the effluent enters the evaporation tank, a heat exchanger is arranged to utilize the first cooling gas for preheating the effluent, the preheated effluent enters the evaporation tank and is sprayed towards the filler again, second cooling gas obtained after the first cooling gas releases heat is sent back to a condenser of the heat pump, and the hot and dry air is obtained under the action of the condenser.In this way, on the premise of not increasing energy consumption, evaporation and concentration efficiency is greatly improved.

The invention discloses an environment-friendly and efficient production method of high-purity silver nitrate. The method includes steps of: firstly, performing a reaction on a silver ingot with nitric acid to obtain a silver nitrate solution; purifying the silver nitrate solution, and sequentially carrying out efficient evaporation under reduced pressure, efficient crystallization, solid-liquid separation, drying, crushing and packaging operations. According to the method, a finished product of 1150-1210 kg of high-purity silver nitrate crystals can be produced from the time when 800-850 kg of silver ingots enter a production line for 22-22.5 hours; hydrogen peroxide is used for absorbing nitric oxide into nitric acid for cyclic utilization; after impurities are removed through the impurity removing agent, filtration is conducted through combination of the negative-pressure filter element and the positive-pressure filter element, efficient solid-liquid separation of silver nitrate isachieved through a suction filtration mode of combination of the pneumatic diaphragm pump and vacuum negative pressure after efficient reduced-pressure evaporation; compared with the prior art, the production method of high-purity silver nitrate has the advantages of being environmentally friendly, efficient, low in cost and high in quality.

The invention provides a spiral falling-film evaporator, and belongs to the field of chemical industry production. The spiral falling-film evaporator comprises an upper barrel, an evaporated stock solution inlet, a spiral falling-film tube, an upper tube plate, a shell, a heating steam inlet, a condensed water outlet and a lower tube plate. The upper end of the upper tube plate is connected with the upper barrel, the evaporated stock solution inlet is formed in the upper end of a side surface of the upper barrel, the lower end of the upper tube plate is connected with the shell, the heating steam inlet is formed in the middle of a side surface of the shell, the condensed water outlet is formed in the bottom of a side surface of the shell, the lower end of the shell is connected with the lower tube plate, the spiral falling-film tube is arranged between the upper tube plate and the lower tube plate, an upper orifice of the spiral falling-film tube extends out of the upper portion of theupper tube plate and is close to the evaporated stock solution inlet, and a lower orifice of the spiral falling-film tube extends out of the lower portion of the lower tube plate. The spiral falling-film evaporator has the advantage that the evaporation concentration efficiency of the spiral falling-film evaporator can be improved.

The invention provides a graphite evaporator. The graphite evaporator comprises a housing, a waveform heat insulating layer is spread on an inner wall of the housing, a corrosion preventing composite layer is spread on an outer wall of the housing, and the housing is made from stainless steel; the upper part, the middle part and the lower part of the housing are separately provided with a loop of steam distributor, sides of each of the steam distributors at the upper part and the lower part of the housing are provided with steam inlets, a steam inlet passage is arranged at one side of the steam distributor in the middle part of the housing, automatic control systems are connected to the steam inlets, and a steam outlet is arranged above one side of the steam inlet at the upper part of the housing; several U-shaped grooves and lateral through holes are arranged at the outside of graphite heat exchange blocks, and places between every two layers of the graphite heat exchange blocks are sealed with fluororubber. The graphite evaporator has the advantages of improved steam utilization rate, enhanced corrosion resistance, high temperature resistance and high pressure resistance, prolonged service life, and excellent performance; automatic control is realized at the same time. The invention also comprises an automatic control system for controlling the graphite heat exchanger.

The invention discloses a sewage treatment device for a synthesis reaction of phenol and acetone. The device is formed through assembly connection of a neutralization kettle, an oil-water separator, asettling tank, a falling-film evaporator, a rectification tower, evaporation crystallization chambers and other equipment through pipelines. Wastewater produced by the rectification tower mainly comprises low-boiling organic matter and a sodium sulfate salt, multi-effect operation is carried out after the wastewater is introduced into the falling-film evaporator so as to achieve sufficient gas-liquid separation, and after the high-boiling sodium sulfate aqueous solution is introduced into a second evaporation crystallization chamber, centrifugal separation and washing are performed on the high-boiling sodium sulfate aqueous solution and sodium sulfate crystal produced in a first evaporation crystallization chamber so as to complete high-purity extraction of sodium sulfate, wherein the recovery rate is high, direct recycling utilization is performed, and the sewage treatment cost is reduced greatly; and the phenol removal rate reaches 99.5% or above after the sewage is treated, the removal rate of acetone, methanol and CODcr reaches 98.5-99.6%, the extraction rate of sodium sulfate reaches 92% or above, and the purity is larger than 95%.

The invention provides a traditional Chinese medicine concentrating device and a traditional Chinese medicine concentrating process, and relates to the pharmaceutical technical field. The traditionalChinese medicine concentrating device includes a raw liquid tank, a main evaporation tank, a gas-liquid separating tank and a steam conveying pipeline; the outlet end of the raw liquid tank is connected with the inlet end of the main evaporation tank, and the output end of the main evaporation tank is connected with the input end of the gas-liquid separating tank; a plurality of first evaporationpipes are arranged in the main evaporation tank, the bottom of the gas-liquid separating tank is provided with a first material chamber and a second material chamber; a plurality of second evaporationpipes are arranged in the first material chamber; a first gas outlet of the top of the gas-liquid separating tank is connected with heating chambers of the first evaporation pipes on the main evaporating tank through a steam compressor. The traditional Chinese medicine concentrating process can significantly reduce energy consumption, can directly obtain high-concentration concentrate, and is suitable for large-scale industrialized application.

The invention provides a graphite evaporator for concentration by evaporation. The graphite evaporator comprises a housing, a waveform heat insulating layer is spread on an inner wall of the housing, a corrosion preventing composite layer is spread on an outer wall of the housing, and the housing is made from stainless steel; the upper part, the middle part and the lower part of the housing are separately provided with a loop of steam distributor, sides of each of the steam distributors at the upper part and the lower part of the housing are provided with steam inlets, a steam inlet passage is arranged at one side of the steam distributor in the middle part of the housing, automatic control systems are connected to the steam inlets, and a steam outlet is arranged above one side of the steam inlet at the upper part of the housing; several U-shaped grooves and lateral through holes are arranged at the outside of graphite heat exchange blocks, and places between every two layers of the graphite heat exchange blocks are sealed with fluororubber. The graphite evaporator has the advantages of improved steam utilization rate, enhanced corrosion resistance, high temperature resistance and high pressure resistance, prolonged service life, and excellent performance; and automatic control is realized at the same time. The invention also comprises an automatic control system for controlling the graphite heat exchanger for concentration by evaporation.

The invention relates to a double-effect evaporation final-effect vapour system. According to the double-effect evaporation final-effect vapour system, a discharge pipe arranged on the lower part of a I-effect slurry flash chamber is communicated with a feed inlet of a I-effect slurry circulating pump; a vapour outlet pipe arranged on the top part of the I-effect slurry flash chamber is communicated with a vapour inlet of a final-effect slurry heater; a feed outlet of the I-effect slurry circulating pump is communicated with a feed inlet arranged on the lower part of a I-effect slurry heater; a discharge pipe arranged on the upper part of the I-effect slurry heater is communicated with a feed inlet of the I-effect slurry flash chamber; a liquor condensate pipe of the I-effect slurry heater is communicated with a I-effect liquor condensate collecting tank; a discharge pipe arranged on the lower part of a final-effect slurry flash chamber is communicated with a feed inlet of a final-effect slurry circulating pump; a feed outlet of the final-effect slurry circulating pump is communicated with a feed inlet arranged on the lower part of the final-effect slurry heater; a discharge pipe arranged on the upper part of the final-effect slurry heater is communicated with a feed inlet of the final-effect slurry flash chamber; and a liquor condensate pipe of the final-effect slurry heater is communicated with a final-effect liquor condensate collecting tank. Process flow is simple; automatic control is adopted; thermal energy of final-effect discharged vapour is used effectively; energy waste is reduced; no polluted water is generated; environmental pollution is avoided; production cost is reduced; and productivity is increased.

The invention belongs to the technical field of processing of cortex eucommiae, and particularly relates to a production process of cortex eucommiae fine powder. The production process is characterized by comprising the following steps: by adopting enzymatic hydrolysate filtrate obtained by degrading folium eucommiae or cortex eucommiae by adopting a biological enzyme method as a raw material, centrifugally separating, precipitating, concentrating, alcohol precipitating, separating, purifying, embedding by virtue of cyclodextrin, and drying, thus obtaining the cortex eucommiae fine powder. Theimprovement of the production process lies in twice centrifugal treatment, filtering and concentration prior to the alcohol precipitation, so that the concentration efficiency can be favorably improved, the production cost can be decreased, the quality of a product can be effectively protected, the heat exchanging efficiency is basically kept unchanged, the evaporation concentration efficiency can be improved, and the energy consumption can be effectively reduced.

The invention discloses a double-effect energy-saving evaporation and concentration system, which can be used for preparing Geshan food retention removing particles. The system comprises a first-effect heater, a first-effect evaporator, a second-effect heater, a second-effect evaporator, a condenser and a vacuum pump which are connected in sequence, and further comprises a heating enhancing mechanism. The heating enhancing mechanism comprises a steam supplementing pipe, the first-effect evaporator is connected with the second-effect heater through a steam conveying pipe, the steam supplementing pipe communicates with the steam conveying pipe, and a one-way valve is arranged on the steam supplementing pipe. By using the double-effect energy-saving evaporation and concentration system, steam can be supplemented and added into the double-effect heater so as to increase the steam amount and temperature, so that the concentration efficiency of liquid medicine in the double-effect evaporator is accelerated, the steam in the single-effect evaporator is utilized to achieve the energy-saving effect, and the processing efficiency of the double-effect evaporator is improved.