16results about How to "Reduce Chloride Content" patented technology

The invention discloses a photovoltaic wastewater lime-process crystallization treatment process and a treatment system used by the same, which are characterized in that acid fluoride wastewater and alkali washing wastewater generated in a photovoltaic sheet production process are respectively collected by an acid fluoride wastewater collecting pool and an alkali washing wastewater collecting pool; the acid fluoride wastewater and a lime agent are subjected to a crystallization reaction in a crystallization fluidized bed to obtain calcium fluoride crystals, effluent of the crystallization fluidized bed and alkali washing wastewater are mixed in a secondary defluorination unit, and calcium chloride is added for a defluorination reaction after the pH value is adjusted; the effluent of the second-stage fluorine removal unit reacts with a fluorine removal agent or polyaluminum chloride in the third-stage fluorine removal unit to remove fluorine again, polyacrylamide is added into the third-stage fluorine removal unit to perform a flocculation reaction, and finally, the fluorine ion concentration in the effluent of the third-stage fluorine removal unit meets the discharge requirement. The agent input cost and the sludge treatment cost are reduced, the secondary pollution of chloride ions is avoided, and the effluent is ensured to stably reach the standard.

The invention discloses a preparation method and application of lignin, and relates to the technical field of preparation of natural organic compounds. The preparation method comprises the following steps: mixing a plant raw material containing lignin with a solution containing sulfurous acid and / or sulfite, reacting at the temperature of 100-180 DEG C under the pressure of 0.4-0.8 MPa, and performing solid-liquid separation to obtain lignin filtrate. The lignin and cellulose obtained through the preparation method are easy to separate, the lignin content in the lignin filtrate is high, the lignin filtrate is applied to zinc smelting oxygen pressure leaching, commercially available lignin can be completely replaced, the proportion of flotation tailings cannot be increased, sulfur recovery is more facilitated, and the TOC content and the chloride ion content of the oxygen pressure leaching liquid can be reduced.

The invention discloses a desulfurization wastewater sludge pretreatment system, the desulfurization wastewater sludge pretreatment system comprises a wastewater cyclone station, a pre-sedimentation tank, an integrated clarifier and a dehydrator, the pre-sedimentation tank is communicated with an outlet of the wastewater cyclone station, the pre-sedimentation tank is provided with an overflow port and a bottom drain outlet, the overflow port is communicated with the integrated clarifier, the bottom drain outlet is communicated with the integrated clarifier, and the dehydrator is communicated with the integrated clarifier. The bottom drain outlet is formed in the bottom of the pre-sedimentation tank and communicated with the dehydrator, and the bottom drain outlet can be opened and closed. According to the desulfurization wastewater sludge pretreatment system, when excessive sludge is accumulated at the bottom of the pre-sedimentation tank, the dewaterer can be used for direct treatment, and upper-layer sewage overflows into the integrated clarifier for further sedimentation, so that the influence of overlarge sludge accumulation height of a traditional pre-sedimentation tank on the operation time of desulfurization wastewater can be avoided; the content of chloride ions in the slurry of the absorption tower can be reduced to a reasonable range, the desulfurization effect is ensured, the sludge accumulation amount is reduced, the abrasion of a sludge feeding pump can be reduced, the replacement period of a pump body is prolonged, and the operation cost is reduced.

The invention relates to a method for reducing the chlorine content of sodium hexafluorophosphate, which comprises the following steps: introducing PF5 / HCl mixed gas into a mixed solution of sodium fluoride and an organic solvent, and reacting to generate a sodium hexafluorophosphate synthetic solution; purifying the sodium hexafluorophosphate synthetic liquid to obtain sodium hexafluorophosphate of which the chlorine content is less than 1ppm; the organic solvent is a first organic solvent or a second organic solvent, and the first organic solvent is a hydrocarbon organic solvent; the second organic solvent is a carbonic ester organic solvent. The sodium hexafluorophosphate obtained by the method is high in purity and low in chloride ion content, and meets the application requirements of sodium ion batteries; the method has the advantages of few three wastes, low energy consumption and high yield, and is suitable for industrial production.

The invention relates to the technical field of waste incineration fly ash treatment, and discloses a waste incineration fly ash comprehensive utilization treatment device and a treatment method. The device comprises a water washing desalination unit, a water washing liquid purification unit and an evaporation salt production unit, chlorine salt in fly ash is effectively removed through multi-stage countercurrent water washing and solid-liquid separation, water washing slag with the chlorine ion content reaching the standard is separated out, and the dechlorinated water washing slag can be further utilized; meanwhile, sodium sylvite is effectively separated out through follow-up water washing liquid treatment, and harmless and resource utilization of the fly ash is achieved; the waste incineration fly ash treatment device achieves the effects of efficiently treating waste incineration fly ash, reducing environmental pollution and improving the water resource utilization rate.

The present invention relates to a desulfurization and dechlorination method and special equipment for regenerated lead smelting ash. The desulfurization and dechlorination method has the following steps: S1, passing the regenerated lead smelting ash into a dechlorination device containing acid liquid and strong oxidizing substances below the liquid level, and performing oxidation reaction to obtain chlorine and acidic materials; S2, filtering the acidic materials to obtain filter residue and filtrate I, conveying the filter residue to the desulfurization device, further filtering the filtrate to obtain filtrate II, and passing it into the desulfurization device for desulfurization reaction to obtain desulfurized materials; S3, filtering the desulfurized materials, and the obtained solid is qualified chlorine-free and desulfurized ash, and the obtained liquid is purified and crystallized to obtain ammonium sulfate byproduct. The entire dechlorination and desulfurization process of the present invention can greatly reduce the processing cost, the process is simple, the chloride ion content in the ash after dechlorination is reduced to less than 500ppm, the risk of equipment corrosion is greatly reduced, the slag-making auxiliary materials required for sulfur fixation in the smelting process are reduced, the smelting output flue gas SO2 content is low, and the pollution to the environment is reduced.

The invention relates to a chlorine removal method for chlorosilane hydrolysate, which comprises the following steps: carrying out single-stage washing or multi-stage countercurrent washing on the chlorosilane hydrolysate, and each stage of washing in the single-stage washing or the multi-stage countercurrent washing comprises the following steps: S100, feeding the chlorosilane hydrolysate and a washing agent into a static mixer for mixing; s200, feeding the mixture into a first coalescer for treatment; s300, feeding a product of the first coalescer into a second coalescer for treatment; s400, conveying a product of the second coalescer into a coalescence buffer tank for separation; wherein in the last-stage washing of the single-stage washing or the multi-stage countercurrent washing, desalted water is used as a washing agent; and besides the first-stage washing, the acid water in the coalescence acid tank of each stage of washing in the multi-stage countercurrent washing is used as a washing agent of the previous stage of washing, and the acid water in the coalescence acid tank of the first-stage washing in the single-stage washing and the multi-stage countercurrent washing is returned to the hydrolysis unit.

The utility model discloses a system of removing chlorine ion in lean organic phase in the system of crude phosphoric acid organic extraction production potassium dihydrogen phosphate, which comprises: a back extraction tank for reacting hydrochloric acid organic phase with ammonia water to generate ammonium chloride and separating phases; an aging tank connected to the outlet of the back extraction tank for static separation and phase separation to precipitate a chlorine-containing water phase; a multi-stage countercurrent water washing tank comprising at least three series-connected water washing tanks for washing the organic phase step by step; and an adsorption tower connected to the outlet of the last-stage water washing tank and provided with an adsorbent for further removing chlorine ions in the organic phase. The utility model fully utilizes washing water, reduces water consumption, realizes a chlorine ion removal rate of 94% to 96% in the lean organic phase, improves the purity of potassium dihydrogen phosphate products, prolongs the service life of the extraction agent, and systematically solves the industry problem that it is difficult to remove alkyl halides in the lean organic phase.

The utility model relates to the technical field of desulfurization and impurity removal, in particular to a slurry impurity removal device of a belt conveyor. The slurry impurity removing device of the belt conveyor comprises a driving wheel, a filtering conveying belt is arranged on the driving wheel, a discharging port is formed in the filtering conveying belt, a discharging outlet is formed in one side of the driving wheel, and a first-stage rotary washing wheel and a second-stage rotary washing wheel are arranged between the discharging port and the discharging outlet. A loosening rake is arranged between the first-stage rotary washing wheel and the second-stage rotary washing wheel, a first-stage supporting frame is arranged below the first-stage rotary washing wheel, a first-stage scraping plate is arranged on the first-stage supporting frame, a first-stage impurity removing canvas is arranged on the first-stage scraping plate, and the first-stage impurity removing canvas is in contact with the filtering conveying belt. According to the device, through the arrangement of the loosening rake, black substances attached to the interior or the bottom of gypsum are also exposed, and the impurity removal efficiency is greatly improved; and through the arrangement of a scraping plate, the working efficiency of the impurity removal canvas is improved.

The invention relates to a fly ash recycling system and method. The system comprises a fly ash curing subsystem for curing and forming fly ash raw materials into cured ash, a water washing subsystem, a water washing liquid post-treatment system and a wet ash post-treatment subsystem, the washing subsystem comprises a washing hopper, n stages of washing liquid barrels and a pump, the washing hopper comprises a filter screen, a liquid distributor, an air pipe and a supporting plate, the liquid distributor is connected with an inlet pipe, the bottom of the washing hopper is connected with an outlet pipe, an inlet of the pump is connected with the outlet pipe and an outlet of each stage of washing liquid barrel, and an outlet of the pump is connected with the inlet pipe and an inlet of each stage of washing liquid barrel. Valves are respectively arranged on the inlet pipe and the outlet pipe, and valves are respectively arranged on pipelines of an inlet and an outlet of each stage of washing liquid bucket. According to the system and method, solid-liquid separation is easy to achieve after water washing, the water-cement ratio in the water washing process is low, water in all stages of water washing liquid buckets is recycled, and the system and method have the advantages of being good in technological process economical efficiency, more convenient to operate, low in energy consumption cost, efficient and the like.

The application belongs to the technical field of wastewater treatment, and relates to a method and system for extracting and removing chlorine ions in industrial wastewater, which comprises the following steps: sending chlorine-containing wastewater into a first extraction tower to contact with an extraction solvent for extraction, so as to obtain a chlorine ion extract and raffinate wastewater; the raffinate wastewater enters a second extraction tower to contact with a diluent for extraction, the residual extraction agent is recovered into the diluent phase, the recovered wastewater enters a diluent stripping tower, an azeotrope of the diluent and water is obtained from the top of the tower, and treated wastewater is obtained from the bottom of the tower; the azeotrope of the diluent and water is pumped into a diluent recovery tower for rectification and separation, so as to obtain pure diluent and still liquid; and the chlorine ion extract is sent into an extraction agent regeneration tower to be regenerated by back extraction with lye, so as to obtain the extraction agent and a chlorine ion concentrate. The application can efficiently remove the chlorine ions in the wastewater, simultaneously realizes complete recovery of the residual extraction agent and diluent in the wastewater, can eliminate secondary pollution, and has the advantages of being clean and environmentally friendly.

The utility model provides an ammonia desulfurization system which comprises an absorption tower, a drying machine, a cyclone group connected between the absorption tower and the drying machine in series, and a return tank connected with the absorption tower through a return pipeline, at least one swirler in the swirler group is connected with the return tank, and the dryer is connected with the return tank through a bypass pipeline. According to the ammonia desulfurization system provided by the utility model, on one hand, the ammonia recovery rate can be improved, the chlorine ion content in the ammonia desulfurization system is reduced, and the corrosion to equipment and an anti-corrosion coating in an absorption tower is reduced, and on the other hand, the equipment use and floor area can be reduced, so that the equipment operation and maintenance cost is reduced; therefore, the technical problems of high equipment operation and maintenance cost, low ammonia recovery rate and unfavorable production benefit improvement caused by more equipment use and larger occupied area in the prior art are solved.

The utility model relates to a bar anti-corrosion device, and relates to the technical field of steel bar production. The device comprises a machine body, a red steel channel allowing bars to pass through is formed in the machine body, a cleaning cavity is formed in one end of the red steel channel, a water inlet pipe is arranged on the machine body, production new water circulates in the water inlet pipe, a plurality of high-pressure water mist nozzles are arranged in the cleaning cavity and all communicate with the water inlet pipe, and the high-pressure water mist nozzles are communicated with the water inlet pipe. A water flowing pipe is arranged on the bottom wall of the machine body and communicates with the bottom wall of the cleaning cavity. The method has the effects that the chlorine ion content of the surface of the finished bar is reduced, and the problem that the bar is prone to being rusted is solved.

The invention belongs to the technical field of harmless and resourceful treatment of household garbage incineration fly ash, and particularly relates to a method for preparing foamed ceramic based on high-calcium and low-silicon type household garbage incineration fly ash. Comprising the following steps: washing the high-calcium low-silicon household garbage incineration fly ash with water to reduce the content of chloride ions; the preparation method comprises the following steps: by taking water-washed fly ash, kaolin and quartz or waste glass powder as raw materials and silicon carbide as a foaming agent, carrying out ball milling, and after ball milling is completed, drying and screening to prepare a mixture; and tabletting the mixture, and sintering to obtain the foamed ceramic. The heavy metal ion leaching concentration of the foamed ceramic prepared through the method meets the national standard requirement, the bending strength far exceeds the national standard requirement, waste utilization is achieved, a new way is provided for harmless treatment of the household garbage incineration fly ash, waste is turned into wealth, and the recycling application field of the household garbage incineration fly ash is widened.

The invention discloses high-performance concrete and a preparation method thereof. The high-performance concrete comprises the following components: dry materials: 500-700 parts of cement, 600-700 parts of pretreated sea sand, 60-80 parts of silica fume, 250-350 parts of steel slag micro powder, 150-180 parts of fly ash, 80-100 parts of quartz sand, 30-35 parts of short linear steel fibers, 20-30 parts of annular steel fibers and 15-17.5 parts of PVA fibers; wet materials: 170-200 parts of water, 8-10 parts of a water reducing agent, 5-7 parts of a retarder and 1-2 parts of an air entraining agent. The pretreated sea sand is utilized, the utilization rate of the sea sand is achieved, the tensile strength of the concrete can be remarkably improved by adding the steel fibers, after the sea sand and the steel fibers are mixed for use, the overall mechanical property of the concrete can be improved, and the corrosion resistance of reinforcing steel bars wrapped in the concrete is enhanced.

The application discloses a resin regeneration wastewater acid-base recycling system, which comprises a chlorine salt wastewater recycling system and a sodium salt wastewater recycling system, and the chlorine salt wastewater recycling system and the sodium salt wastewater recycling system are connected with a salt solution storage tank through pipelines; a chlorine ion monitor is arranged on the pipeline connected with the salt solution storage tank, and the chlorine ion monitor is arranged close to the salt solution storage tank; and the application further discloses a wastewater treatment method of the resin regeneration wastewater acid-base recycling system. The cation resin chlorine salt wastewater is electrolyzed through an electric adsorption electrolysis device to obtain hydrochloric acid solution and miscellaneous alkali solution which are respectively transported to a hydrochloric acid storage tank and a miscellaneous alkali water tank; meanwhile, the anion resin sodium salt wastewater is electrolyzed through a sodium salt electric adsorption electrolysis device to obtain sodium hydroxide solution and miscellaneous acid solution which are respectively transported to a sodium hydroxide storage tank and a miscellaneous acid water tank; and the miscellaneous acid solution and the miscellaneous alkali solution are mutually neutralized in the pipeline to obtain a salt solution for a desulfurization system. The recycling system avoids the problem of high chlorine content in the desulfurization system.