12 results about "Salt sodium" patented technology

The invention discloses a waste incineration fly ash coupling sodium-based waste salt harmless treatment resource utilization method, which comprises the following steps: preparing household waste incineration fly ash and sodium-based waste salt according to a dry basis molar content ratio of (1-1.05): 1, uniformly mixing, and carrying out heat treatment at 450-500 DEG C to obtain an ash-salt mixture; washing with water to remove chlorine salt and heavy metal to obtain a chlorine salt solution and a mud cake; treating the chlorine salt solution to obtain industrial regenerated salt sodium chloride and potassium chloride; pulping the mud cake, adding a flotation agent for flotation to obtain flotation residues and industrial dihydrate gypsum, and preparing alpha gypsum from the industrial dihydrate gypsum by using a dry method; and after flotation, feeding residues into a grinding unit for grinding to obtain the desulfurizer. According to the method, the fly ash and the sodium-based waste salt are subjected to coupling treatment in one set of equipment, potassium chloride, sodium chloride, gypsum, calcium carbonate, calcium hydroxide and the like in the waste incineration fly ash and the sodium-based waste salt are effectively and respectively treated into products for all purposes, recycling of all valuable components is achieved, and the resource utilization value is high.

The invention relates to the technical field of wastewater treatment, and discloses a recycling washing water treatment process of sodium chloride high-salinity wastewater, which comprises the following steps: step 1, a pretreatment stage: recycling washing water with a pH value range of 6-9 and main solutes of NaCl and Ca < 2 + lt >; 350mg / L, Mg < 2 + lt >; the method comprises the following steps: introducing washing water with the concentration of 350mg / L and the TDS of more than 100g / L into a multi-medium filter, removing impurities in the washing water through a multi-layer filtering structure by utilizing the adsorption and interception effects of a filtering medium, and controlling the filtering speed to be 8-12m / h; and step 2, a hardness removal stage: the water treated by the multi-medium filter enters a hardness removal resin device, and strong-acid cation exchange resin is adopted to carry out ion exchange reaction with Ca < 2 + > and Mg < 2 + > in the water to remove calcium and magnesium ions in the water. And in the hardness removal process, the flow speed is controlled to be 4-6 m / h. Water resources and salt in washing water are fully separated and recycled, no by-product pollutant is discharged into the environment, pollution to soil, water and atmosphere is greatly reduced, and balance of the ecological environment is protected.

The utility model discloses a high-salt sodium hypochlorite wastewater treatment system in polyvinyl chloride production. Comprising a sodium hypochlorite wastewater tank, a hardness removal lift pump, a pipeline mixer I, a hardness removal device, a pipeline mixer II, a hardness removal buffer tank, an ultrafiltration lift pump, a sand filtration device, an ultrafiltration device security filter, an ultrafiltration device, an ultrafiltration water production tank, a reverse osmosis lift pump, a pipeline mixer III, a reverse osmosis device security filter, a reverse osmosis high-pressure pump and a reverse osmosis device which are connected in sequence, sodium hypochlorite wastewater with the TDS content being smaller than or equal to 20000 mg / L and the COD content being smaller than or equal to 800 mg / L is separated into a low-salt-content reuse water reuse system through a reverse osmosis inter-section pressure pump, a comprehensive adjusting tank, a concentrated water pump, a reuse water tank and a reuse water pump, high-salt-content concentrated water is evaporated and concentrated and then reused for salt dissolving, the problems of resource waste and environmental pollution of the sodium hypochlorite wastewater are fundamentally solved, and the system is suitable for industrial production. And reduction, harmlessness and resource utilization of the sodium hypochlorite wastewater are realized.

The invention discloses a solid sensible heat storage material based on industrial waste salt, a preparation method and application, and belongs to the technical field of heat storage materials, the solid sensible heat storage material comprises 90-99% of a salt heat storage medium and 1-10% of an additive, and the salt heat storage medium comprises sodium sulfate and / or sodium chloride. The solid sensible heat storage material is prepared by mixing industrial waste salt sodium chloride and / or sodium sulfate serving as a raw material with a small amount of additives, so that resource utilization of the industrial waste salt is realized, and the production cost of the heat storage material is reduced.

The application discloses a device for preparing electronic-grade sodium hypophosphite dearsenicated salt sodium salt, and belongs to the technical field of electronic chemical preparation. The device realizes the efficient dispersion of phosphine gas into micron-sized bubbles through a membrane dispersion reaction system, realizes the full and stable reaction of the phosphine gas with sodium hypochlorite solution, guarantees the high efficiency and uniformity of the main synthesis reaction from the source, and provides a composition-stable crude product liquid for subsequent continuous purification. Through a bypass arsenic removal unit integrated in a buffer adjustment system, the on-line circulation oxidation-precipitation-separation of arsenic impurities is realized without interrupting the main synthesis process, and the problem of the interruption of the synthesis route caused by the intermittent arsenic removal in the traditional process is solved. By arranging yellow phosphorus storage tanks in parallel and alternately working, the continuous and stable supply of the raw material yellow phosphorus to the phosphine reaction kettle is realized. The device ensures the long-term continuous and stable operation of the synthesis route and the high consistency of product batches, and is particularly suitable for the large-scale continuous production of electronic-grade sodium hypophosphite.

The invention discloses a recovery method and application of sodium sulfate high-salinity wastewater, and belongs to the technical field of resource recovery. The method comprises the following steps: S1, adding a recapturing agent containing a phosphate group into the sodium sulfate wastewater, and reacting to remove heavy metals in the wastewater to obtain a heavy-removed mother solution, S2, concentrating the heavy-removed mother solution, carrying out double decomposition reaction on the concentrated heavy-removed mother solution and ammonium bicarbonate, and separating to obtain a sodium bicarbonate crude product and a double decomposition mother solution, and S3, rectifying the double decomposition mother solution to obtain a rectified mother solution and tower top distillate, s4, carrying out first-stage evaporation and concentration on the rectification mother liquor, and separating to obtain sodium sulfate and first-stage evaporation mother liquor; and S5, carrying out second-stage evaporation and concentration on the first-stage evaporation mother liquor, so as to obtain ammonium sulfate crystals. According to the method disclosed by the invention, heavy metals are efficiently removed, the sodium ion conversion rate is improved, and high-purity ammonium sulfate is obtained and meets the standard of agricultural ammonium sulfate GB / T 535-2020.

This invention discloses a solid sensible heat storage material based on industrial waste salt, its preparation method, and its application, belonging to the field of heat storage material technology. The solid sensible heat storage material comprises 90-99% salt heat storage medium and 1-10% additives. The salt heat storage medium includes sodium sulfate and / or sodium chloride. This invention uses industrial waste salt sodium chloride and / or sodium sulfate as raw materials, mixed with a small amount of additives to prepare a solid sensible heat storage material, thereby realizing the resource utilization of industrial waste salt and reducing the production cost of heat storage materials.

This invention provides a method, system, and application for the co-production of ammonium sulfate from industrial waste sodium sulfate, belonging to the technical field of industrial waste salt resource utilization. The method includes: dissolving solid waste sodium sulfate in water to form a waste sodium sulfate solution; adding an additive for pretreatment; and obtaining a sodium sulfate mother liquor after solid-liquid separation; performing a metathesis reaction between the sodium sulfate mother liquor and solid ammonium bicarbonate; obtaining sodium bicarbonate and a first mother liquor after solid-liquid separation; heating and evaporating the first mother liquor to recover the generated ammonia and carbon dioxide, which are then used to prepare ammonium bicarbonate; cooling and crystallizing the evaporated first mother liquor; recovering solid sodium sulfate after solid-liquid separation; and evaporating and crystallizing the remaining portion to obtain ammonium sulfate; reusing the recovered ammonium bicarbonate in the metathesis reaction; and recycling the solid sodium sulfate. This invention constructs a closed-loop process for the high-value and resource-based utilization of industrial waste sodium sulfate.

The utility model relates to a drying device for sodium ferrocyanide production relates to sodium ferrocyanide production equipment technical field, including: tank body, tank body top is equipped with feeding hopper, and tank body lower part one side is opened has the discharge gate, the feeding hopper is arranged between the discharge gate with the tank body in the tank body, and the spiral structure is arranged, and the vibration subassembly is arranged between the tank body bottom with the feeding hopper, and the hot -blast subassembly is arranged in tank body lower part one side, and the hot -blast subassembly's air outlet end is linked with the tank body inside, the vibration subassembly drives the feeding hopper and vibrates in vertical direction to make sodium ferrocyanide even dry discharge along the track of feeding hopper, and the operation is simple and convenient, can carry out the continuous drying operation to sodium ferrocyanide, and under the action of vibration force still can make sodium ferrocyanide even lay in the feeding hopper and carry out the discharge under the action of vibration force, avoid its occurrence stick and agglomerate, guarantee the drying efficiency and drying quality.

The invention discloses a method for producing baking soda and ammonium sulfate by utilizing solid treatment hazardous waste salt sodium sulfate, and belongs to the technical field of chemical engineering. The method comprises the following steps: performing high-temperature refining on the waste salt sodium sulfate, mixing the refined waste salt sodium sulfate with ammoniated mother liquor, adding mixed salt for reaction, performing salting-out crystallization, and performing cold-out crystallization; cO2 is introduced into the cold separation mother liquor, ammonium bicarbonate solids and CO2 are added into the carbonized solution, sodium bicarbonate solids and mother liquor are formed through separation, ammonia gas is introduced into the mother liquor to enter an ammoniation process, the ammoniated mother liquor is subjected to salting-out crystallization, and circulation is formed; refining the double salt I to obtain mixed salt and mixed salt mother liquor, cooling the mixed salt mother liquor to obtain double salt II and an ammonium sulfate solution, evaporating the ammonium sulfate solution to obtain ammonium sulfate, and enabling the double salt II to enter a double salt refining process for recycling. Efficient treatment and resource utilization of the industrial waste salt are achieved, the process is environmentally friendly, secondary pollution is low, and the quality of the product baking soda and ammonium sulfate is stable.

The invention relates to the field of chemical production, in particular to a system and a preparation method for producing low-salt soda ash by a combined soda production process, a carbonization tower is arranged at the front end of the system, filtering and washing equipment and calcining equipment are sequentially arranged behind the carbonization tower, and the filtering and washing equipment comprises primary washing equipment and secondary washing equipment; the method comprises the following steps: treating a carbonizer extraction liquid through primary washing equipment to obtain sodium bicarbonate, and enabling the generated mother liquor to enter a mother liquor circulating system; the sodium bicarbonate is subjected to back washing and dehydration treatment, and generated mother liquor enters a mother liquor circulating system; calcining the re-washed sodium bicarbonate to obtain a sodium carbonate product; the total washing water amount used in the method is 0.58-0.62 m < 3 > / ton of sodium carbonate, under the condition that a small amount of washing water is used, the stability of the mother liquor is maintained, meanwhile, the salt content of the prepared sodium carbonate is 0.2-0.3 wt%, the purity can reach 99.4%, the quality requirement of low-salt sodium carbonate is met, and the method is suitable for industrial production. The prepared soda ash can be applied to multiple fields of optical glass manufacturing, kinescope glass bulb manufacturing, vehicle-mounted glass manufacturing and the like.

The invention discloses a novel method for co-extracting lithium, rubidium and cesium by roasting lepidolite through organic sodium salt reinforced sulfate, and belongs to the technical field of valuable metal extraction of ores. Thermodynamic analysis is carried out on isomorphic substitution reaction of sodium ions and calcium ions in sulfate, and the sulfate and sodium carboxymethyl cellulose are adopted as co-roasting agents to carry out grinding, roasting and water leaching treatment on lepidolite, so that efficient leaching of lithium, rubidium and cesium is realized. According to the method, due to the introduction of sodium carboxymethyl cellulose, the remarkable effects are achieved: the use amount of a sulfate additive is reduced by 10%-25%, the leaching rates of lithium, rubidium and cesium are improved by 5%-10%, and the leaching residue amount is also reduced by 20%-30%. According to the method, on the basis of a traditional sulfate roasting lithium extraction process, the organic salt sodium carboxymethyl cellulose is creatively selected as a roasting additive, and a new thought and a technical path are provided for subsequent related experimental research.