33results about How to "Reduce evaporation costs" patented technology

The invention relates to a method for recovering and separating a potassium salt and a sodium salt from waste incineration fly ash, which comprises the following steps of: extracting the potassium salt, the sodium salt and a calcium salt from the waste incineration fly ash by quartz sand and water to obtain high-concentration salt-containing water, separating the quartz sand from the fly ash, returning the quartz sand for continue use; adjusting the pH value of the high-concentration salt-containing water to 5-7 with an acid, and conducting evaporating and concentrating to obtain potassium andsodium mixed salts and a residual calcium chloride saturated solution; conducting flotation separation on the potassium and sodium mixed salts in saturated potassium chloride and sodium chloride solutions, and conducting filtration, so as to obtain a foam product, namely potassium chloride, and tailings slurry, namely sodium chloride; respectively conducting stirring washing on the potassium chloride and sodium chloride obtained by flotation through corresponding saturated salt water, and conducting filtering to obtain industrial grade potassium chloride and sodium chloride products, whereina washing solution is a saturated potassium chloride and sodium chloride mixed solution and is returned to the flotation procedure as a supplement solution of a flotation medium. The method effectively separates soluble salts in the fly ash: potassium chloride, sodium chloride and calcium chloride without decalcification to obtain high purity or industrial grade potassium chloride and sodium chloride products; and the efficiency-cost ratio of the treatment process is greatly improved.

The invention discloses a low-cost iron phosphate ammonia-nitrogen-containing wastewater treatment method, which comprises: adding an appropriate amount of Ca(OH)2 to an iron phosphate mother liquor,adjusting the pH value to 6-8 to form a calcium sulfate precipitate, and filtering the precipitate to obtain a first mixed liquid, wherein the first mixed liquid mainly contains NH4<+>, SO4<2-> and PO4<3->; carrying out first membrane concentration on the first mixed liquid to obtain a second mixed liquid; carrying out MVR evaporation on the second mixed liquid, and separating to obtain an ammonium sulfate crystal and an ammonium phosphate crystal; and washing the crystals, and drying to obtain the ammonium sulfate finished product and the ammonium phosphate finished product. According to thepresent invention, the process of the method is simple, and the used raw material is Ca(OH)2, and Ca(OH)2 can reduce the salt concentration in the system, such that the amount of the water entering the MVR evaporation can be reduced so as to correspondingly reduce the evaporation cost; and Ca(OH)2 is a solid, and cannot increase the amount of the water in the system so as to reduce the treatment capacity of the first membrane concentration system and the treatment cost.

The invention discloses industrialized application of a sodium-sulfide solution three-time black-ash (a product which is obtained by calcining barite and has the main composition barium sulfide) leaching technology to barium sulfate production industry, and concretely discloses a method for improving sodium sulfide solution concentration by leaching black ash for three times. The method comprises: using a sodium sulfide solution with the concentration of 4-5% to perform leaching on crushed black ash for three times, namely, performing precipitate separation on a solution subjected to first leaching to obtain a mother liquid I, using the mother liquid I to continue to perform secondary leaching on black ash, and performing secondary precipitate separation on the leached solution to obtain a mother liquid II, using the mother liquid II to performing third leaching, and performing precipitate separation on a solution subjected to third leaching to obtain a mother liquid III, using the mother liquid III to react with a sodium sulfate solution to generate barium sulfate and a sodium sulfide solution which has the concentration of 8-10% after three times of leaching, performing solid-liquid separation on the sodium sulfide solution, and then performing precipitation and clarification, so as to enable the sodium sulfide solution to enter a next process of evaporation. The method is reasonable in design, helps to improve the concentration of the sodium sulfide solution and reducing the evaporation amount by performing leaching on black ash for three times, and realizes the purpose of reducing production cost of 60 alkali (an alkali sulfide with the sodium sulfide content of 60%).

The invention discloses a recycling process and system for cyclic utilization of high-salt and high-concentration non-biodegradable organic matter-containing H acid wastewater and production of anhydrous sodium sulfate; the process for production of anhydrous sodium sulfate through solvent-out crystallization, waste acid cyclic utilization and high-temperature boiling granulation and oxidation is designed for the high-salt high-organic-matter H acid wastewater, so all components of the H acid wastewater are recycled with low cost, the production costs of H acid is reduced, zero emission of pollutants is achieved, and the method is the best way for H acid wastewater low-cost recycling, has demonstration significance for treatment of high-salt and high-concentration non-biodegradable organic matter wastewater, and has huge economic and social benefits.

The invention discloses a production method of low-sugar soya-bean milk, which mainly comprises the following steps: (1) pretreatment: soybean extracting solution is filtered by a filtering bag, suspended matters such as bean dregs in the soybean extracting solution can be removed, so as to ensure the safety of a membrane system and obtain clear solution of the soybean extracting solution; (2) sugar removal by hyperfiltration: the clear solution of the soybean extracting solution, which is pretreated, enters into a hyperfiltration membrane system, hyperfiltration concentration is carried out,and the solution is concentrated by two times, water is added in the concentrated solution for washing, so as to wash sugar ingredient in the concentrated solution in a circulating way and measure thesugar degree in the concentrated solution and dialysate at regular time, until the sugar ingredient in the concentrated solution is reduced to be stable, the treatment of sugar removal by hyperfiltration is stopped; (3) nanofiltration and contraction: the hyperfiltration dialysate is placed in a nanofiltration membrane system, the sugar ingredient in the dialysate is concentrated and extracted, and the nanofiltration dialysate water returns back to the production to be used as pulping water. In the whole treating process, other substances are not added, the treatment is carried out at normaltemperature, and the method has the advantages of energy saving, environmental protection and good separating effect.

The invention provides an electroplating waste water zero discharge system and relates to the technical field of sewage treatment. The bottoms of a nickel-containing waste water regulating pool, a nickel-containing waste water PH regulating pool, a nickel-containing waste water buffer pool, a nickel-containing waste water coagulating pool, a nickel-containing waste water flocculating pool and a nickel-containing waste water settling pool are connected with a nickel-containing sludge concentration pool through pipelines; the nickel-containing sludge concentration pool is connected with a nickel-containing sludge compressor; concentrated liquid in the nickel-containing sludge compressor is connected with the nickel-containing waste water regulating pool through a pipeline; a phosphorus-containing waste water regulating pool, a phosphorus-containing waste water PH regulating pool, a phosphorus-containing waste water reaction pool, a phosphorus-containing waste water coagulating pool, a phosphorus-containing waste water flocculating pool and a phosphorus-containing waste water settling pool are connected through pipelines. The electroplating waste water zero discharge system is high inremoval rate of pollutants and stable to operate, reasonably utilizes an advanced membrane technology, reduces membrane blockage, guarantees the service life of the membrane, increases the water production rate of the membrane, can reduce evaporation cost and has higher practicability.

The invention relates to a method and device for recycling lithium from exchange waste fluid containing lithium. The method comprises the steps of modulating potential of hydrogen (pH) value and concentration of the exchange waste fluid, evaporating and recrystallizing, cooling crystal mush, continuously subsiding and performing centrifugal separation, performing fluidized drying, dissolving withethanol and performing vacuum filtration distillation. Compared with the prior art, the method and device for recycling the lithium from the exchange waste fluid containing the lithium are suitable for recycling the lithium in the exchange waste fluid containing the lithium which is produced in the production of efficient adsorbent containing the lithium, and the method is high in recycling rate of lithium chloride, simple in process control, friendly to environment and free of pollution of waste gas, waste water and waste residues.

The invention discloses an internal-combustion waste water treatment device which comprises a motor, a transmission device, an evaporation cylinder, an evaporation tank, a chimney, an ash discharge port, an air blower, an air valve, an air supply pipe, a fuel inlet pipeline, an ash discharge pipeline, a frame, a waste water raw material pool and a liquid transmission pipe, wherein one side of the transmission device is connected with the motor, and the other side is connected with the evaporation cylinder; the evaporation cylinder is installed inside the evaporation tank; both ends of the evaporation cylinder are respectively provided with an opening, one opening is connected with the fuel inlet pipeline, and the other opening is connected with the ash discharge pipeline; the waste water raw material pool is positioned on the upper end of the back side of the frame; the upper end of the front side of the frame is provided with a front support and a back support; the evaporation tank is positioned between the front support and the back support; the fuel inlet pipeline is installed on the upper end of the front support; the ash discharge pipeline is installed on the upper end of the back support; the tail end of the ash discharge pipeline is provided with the chimney and the ash discharge port; the side of the fuel inlet pipeline is provided with the air blower; and the waste water raw material pool is connected with the evaporation tank through the liquid transmission pipe. The invention has the advantages of low heat loss, manpower saving and low cost for waste water treatment.

The invention relates to evaporation cooling integrated equipment. The equipment comprises a distillation still, a condenser, a heat exchanger, a compressor and an air cooling unit. The distillation still is connected to a water vapor inlet of the condenser through a pipeline, an evaporation condensed water outlet of the condenser is connected to a second water tank through a pipeline, the condenser is connected to a vacuum pump, a cooling water inlet and a cooling water outlet of the condenser are both connected to a first water tank, the distillation still is equipped with a waste liquid pipe and a slagging pipe, the compressor, the air cooling unit, an expansion valve and the heat exchanger are connected through pipelines to form a refrigerant circulation loop, and water from the firstwater tank enters the heat exchanger through a pipeline and is cooled by a refrigerant to form low-temperature water, which then returns to the first water tank again.

The invention discloses a method for synchronously removing sodium sulfate and sodium chloride in wastewater through three cycles. The method has the advantages of simple process flow, strong stability, high product purity, low energy consumption and the like. The method provided by the invention comprises the following steps: first cycle: sodium sulfate crystallization cycle; second cycle: sodiumchloride crystallization cycle; third cycle: sodium chloride similar ion cycle.

The invention discloses an internal combustion type wastewater treatment device with an automatic temperature control rotating speed device, which comprises a motor, a driving device, the automatic temperature control rotating speed device, an evaporation cylinder, an evaporation groove, a chimney, an ash discharging port, a blower, an air valve, an air supply pipe, a fuel feeding pipeline and an ash discharging pipeline; one end of the automatic temperature control rotating speed device is connected with a power supply, and the other end is connected with the motor; one side of the driving device is connected with the motor, and the other side is connected with the evaporation cylinder; the evaporation cylinder is arranged inside the evaporation groove; the inside of the evaporation cylinder is hollow; a hearth is arranged inside the evaporation cylinder; two openings are respectively reserved at two ends of the evaporation cylinder; one opening is connected with the fuel feeding pipeline; the other opening is connected with the ash discharging pipeline; the chimney and the ash discharging port are arranged at the tail end of the ash discharging pipeline; the chimney is arranged at the upper part of the tail end of the ash discharging pipeline; the ash discharging port is arranged at the lower part of the tail end of the ash discharging pipeline; the blower is arranged on the side of the fuel feeding pipeline; the air supply pipe is arranged outside the blower and is connected to the hearth; and the air valve is arranged on the air supply pipe. The invention has the advantages of less heat loss, high evaporation efficiency and low wastewater treatment cost.

The invention discloses a reverse osmosis concentrated water concentration reduction method. The method comprises the following steps: detecting the inlet water quality of reverse osmosis concentratedwater, directly entering a next step when the water quality of the reverse osmosis concentrated water meets the standard, otherwise, pretreating the reverse osmosis concentrated water, and then entering the next step; carrying out multiple times of circulating concentration on the reverse osmosis concentrated water, and heating the reverse osmosis concentrated water and then carrying out pervaporation during each time of concentration; concentrating the reverse osmosis concentrated water for multiple times to obtain a secondary concentrated solution, and entering the next step; and carrying out MVR multi-effect evaporation on the secondary concentrated solution to obtain fresh water and inorganic salt crystals. The method has the characteristics of large application range, low treatment cost and good treatment effect.

The invention discloses a method for recovering sodium sulfate from white carbon black feed liquid. The method comprises the following steps: (1) filtering a white carbon black feed liquid to obtain filtrate with SDI less than or equal to 5; (2) performing membrane concentration on the filtrate to obtain a membrane concentrated solution with the sodium sulfate content being greater than or equal to 180 g/L; (3) evaporating and concentrating the membrane concentrated solution to obtain an evaporated concentrated solution with the content of sodium sulfate being greater than or equal to 280 g/L; and (4) separating out sodium sulfate in the evaporation concentrated solution to obtain sodium sulfate. According to the method disclosed by the invention, residual silicon dioxide in the white carbon black feed liquid is effectively recovered in a filtering manner, the loss and pollution of granular silicon dioxide are reduced, the pretreatment investment is reduced, and the stability and economic benefits of the process are improved; through verification, compared with the mode of pure evaporation and concentration, the mode of combining membrane concentration and evaporation and concentration can reduce the evaporation capacity by 75-85%, so that the evaporation cost is reduced by more than 50%; and the sodium sulfate finally obtained by the method is high in purity and can be sold, and salt benefits are remarkably improved.

The invention relates to a method for recycling waste mushroom sticks, which comprises the following steps: (1) exposing the shiitake mushroom waste mushroom sticks to the sun, crushing, sieving, andcarrying out constant-temperature treatment in hydrochloric acid, so as to obtain shiitake mushroom waste mushroom stick powder; 2) soaking the shiitake mushroom waste mushroom stick powder in the fresh tobacco leaf boiling liquid at a high temperature, and performing ultrasonic treatment to obtain a mixed liquid; 3) preparing a sodium hydroxide solution from the mixed solution and carrying out constant-temperature treatment; 4) preparing an ammonium nitrate solution from the mixed solution and carrying out constant-temperature treatment; 5) adjusting the pH value of the mixed solution by using vinegar residues, and then evaporating and concentrating to obtain a mushroom waste stick recycled material; (6) mixing and fermenting the shiitake mushroom waste mushroom stick recycled material with potato residues, corncob powder, beet pulp and an EM microbial agent to obtain a fermented material; 7, adding urea, monopotassium phosphate, calcium superphosphate and lime into the fermented material, then performing constant-temperature treatment and bagging, and obtaining the composite organic material. The composite organic material prepared through the method is used for the shiitake mushroom and oyster mushroom cultivation material, so nutritional requirements in the hypha germination and growth process can be met, and the effect of preventing diseases and insect pests is achieved.