16results about How to "Reduce processing operating costs" 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 relates to a cold precipitation-salting-out integrated ammonium chloride preparation method and system, which comprises the following steps: reducing the temperature of an ammonium chloride-containing solution generated in a combined alkali production process to below 10 DEG C, then adding sodium chloride into the solution while stirring until an ammonium chloride saturated salt solution is formed, standing, then cooling in a stepped manner, and after ammonium chloride crystals are completely separated out, obtaining ammonium chloride. And centrifuging to obtain an ammonium chloride product. Compared with a traditional separation preparation method of cold precipitation and salting-out in sequence, the method has the advantages that the ammonium chloride-containing solution generated in the combined alkali production process is subjected to cold precipitation and salting-out at the same time through one-step operation, so that the process flow is simplified, the time is greatly saved, the production efficiency and the yield are improved, the equipment investment is reduced, and the process operation cost is reduced; and the yield is improved.

The invention discloses a salt-tolerant denitrifying bacterium and application of the salt-tolerant denitrifying bacterium, the salt-tolerant denitrifying bacterium is specifically Stutzerimonas degrandans and is named as Stutzerimonas degrandans BP, the preservation number of the salt-tolerant denitrifying bacterium is GDMCC No.64297, and the salt-tolerant denitrifying bacterium is preserved in the Guangdong Microbial Culture Collection Center on January 19, 2024. When the Stutzerimonas degrandans BP provided by the invention is used for biological nitrogen removal of high-salinity wastewater, the Stutzerimonas degrandans BP has relatively strong salt-tolerant denitrification capability, NO3 <->-N in a high-salinity water body can be effectively removed, no by-products such as NO2 <->-N and NH4 < + >-N are accumulated, and secondary pollution cannot be caused. Experimental results show that the Stutzerimonas degrandans BP provided by the invention is a facultative anaerobic bacterium, and is suitable for biological nitrogen removal in an anaerobic or anoxic environment. Under an anaerobic condition, high-efficiency salt-tolerant denitrification can be realized by virtue of relatively small biomass (OD600 = 0.15-0.25), so that the yield of sludge can be reduced while the operation cost of the process is reduced.

The invention discloses an ozone fluidized bed catalyst and a preparation method thereof. The preparation method comprises the following steps: step 1, preparing a fluorine-containing polymer aqueous emulsion; 2, adding a certain mass of carbon-based material powder and catalyst powder into the fluorine-containing polymer aqueous emulsion, and dispersing to form a catalyst suspension; step 3, applying the catalyst suspension to a base material by using a wet coating method, and preparing a catalyst film through the steps of solvent drying, sintering, cooling, stripping, washing and the like; and 4, cutting the catalyst film into a certain size to finally obtain the fluidized bed catalyst. The method is easy to fully fluidize and has the advantage of reaction rate.

The invention discloses a citrus peel progressive extraction method and a device thereof. Citrus peel essential oil and citrus core can be recovered by pretreating and progressively extracting the citrus peel. In the process of progressive extraction of the citrus peel, high value-added products such as citrus peel infusion syrup, hesperidin, pectin, dietary fiber, etc. can be obtained in sequence, which has extremely important economic value. The method and the device of the invention can sequentially complete the extraction of citrus infusion syrup, hesperidin, pectin and purification of dietary fiber raw materials without transferring the citrus peel, transforming the traditional complicated extraction operation into a simplified, systematic and continuous operation, greatly improving labor efficiency and reducing material and power consumption. The invention adopts a secondary or tertiary extraction phase process, greatly improving the concentration of the extract in the extract, improving the product recovery rate, and truly realizing the full utilization of the citrus peel, thus expanding extremely important new resources for the development of the food processing industry.

The present application relates to the field of coking, synthetic ammonia and the like containing ammonia wastewater treatment, and discloses a novel ammonia evaporation energy-saving process system, a primary ammonia evaporation tower, an intermediate pressurizing pump set, a water flow regulating device, a secondary ammonia evaporation device, a flash tank, a steam ejector, a pressurizing pump set and a control unit. After the ammonia-containing wastewater is preliminarily treated by the primary ammonia evaporation tower, it is delivered to the secondary ammonia evaporation device by the pressurizing pump, and introduced into new steam for secondary ammonia evaporation. After the secondary ammonia evaporation, the wastewater flows into the flash tank to produce flash steam by cooling and pressure reduction, and the flash steam is pressurized by mixing with the new steam through the steam ejector, and then returns to the primary ammonia evaporation tower or the secondary ammonia evaporation device, so that the steam is recycled multiple times. The system can effectively reduce the new steam consumption by 35-45% under the premise of ensuring the stability of the ammonia nitrogen index of the effluent, improve the energy utilization rate, reduce carbon emissions, and is suitable for direct ammonia evaporation and indirect ammonia evaporation systems.

The application discloses a double-layer liquid layer photocatalytic reactor, which comprises a circular tubular reactor with a cavity, the circular tubular reactor comprises a cylindrical ultraviolet lamp tube and two layers of annular liquid layers; wherein the cylindrical ultraviolet lamp tube is located at the center of the circular tubular reactor, one end of the ultraviolet lamp tube is connected with electricity, and the ultraviolet lamp tube can emit ultraviolet light to the surrounding; wherein the inner layer of the two layers of annular liquid layers is wrapped outside the cylindrical ultraviolet lamp tube, and the outer layer of the two layers of annular liquid layers is wrapped outside the inner layer; wherein the two sides of the inner layer and the outer layer of the two layers of annular liquid layers are respectively provided with water inlets and water outlets, the water inlet of the inner layer and the water outlet of the outer layer are located on the same side and are adjacently arranged, and the water outlet of the inner layer and the water inlet of the outer layer are located on the other side and are adjacently arranged.

The application discloses a method for preparing arsenic-cadmium alloy by using arsenic-cadmium acid waste liquid, and belongs to the technical field of wastewater treatment. The application realizes the selective precipitation of arsenic and cadmium in the form of Cd5H2(AsO4)4.4H2O with high purity and complete crystal form by precisely controlling the molar ratio of cadmium to arsenic in the waste liquid to be 1.2-1.6 and adjusting the pH of the precipitation to be 4-6, thereby realizing the deep removal of the two toxic elements of arsenic and cadmium, and the removal rate of arsenic can reach more than 96.70%, and the process flow is greatly reduced. The Cd5H2(AsO4)4.4H2O-based precipitation slag is converted into high-purity arsenic-cadmium alloy by carbon thermal reduction, the amount of slag is greatly compressed, and the storage and landfill of waste materials are significantly reduced. The alloy can be further used to prepare downstream products such as semiconductor materials as a high-value-added product, realizes the high-value conversion from harmful waste to high-end raw materials, and has remarkable green disposal and resource utilization benefits.

The invention provides a modification method of a molecular sieve catalyst, a catalyst prepared from the molecular sieve catalyst and a series catalyst system containing the catalyst. The invention also provides a method for co-producing caprolactam and 6-aminocapronitrile by performing cyclohexanone-oxime rearrangement ammonification reaction by using the series catalyst system. The molecular sieve catalyst is subjected to acetate modification, so that the conversion rate of cyclohexanone-oxime is increased, and the service life of the catalyst is prolonged. The tandem catalyst system provided by the invention can realize the effect of co-production of caprolactam and 6-aminocapronitrile by taking cyclohexanone oxime as a reaction raw material. The proportion of the two target products can be autonomously regulated and controlled by changing the filling proportion of the series catalyst or changing the proportion of ammonia gas in the reaction carrier gas, so that the selective production of caprolactam and 6-aminocapronitrile can be performed according to the change of the market price of the product, and the method has the advantages of short process flow, high added value of the product and strong market impact resistance.

The utility model discloses an electric heating cracking furnace applied to ethylene production. The furnace wall of a radiation area comprises a heat storage layer, a heat insulation layer and a heat preservation layer from inside to outside. Electric heating elements are arranged in inner holes of the heat storage bricks, end faces are in sealed connection through convex-concave curved surfaces, breather pipes are arranged on the outer sides, and inert gas protects the electric heating elements. The heat insulation layer is made of pasty heat insulation materials, and the total thickness is 10-15 mm. A temperature measuring device is installed in the heat preservation layer, the thermocouple head is arranged in a groove or a pit on the outer side of the heat storage brick, a large spiral ring and a small spiral ring are arranged on the compensation wire, the large spiral ring is arranged in the ceramic tube, the small spiral ring is arranged in the outer end portion, and the large spiral ring and the outer end portion are fixedly connected into a whole in an insulation mode. The furnace wall is provided with flat flame burners which are staggered at intervals, electric heating is mainly used, and flame heating is assisted. The thermal insulation effect is good, emission of combustion tail gas is reduced, the service life of the cracking pipe is prolonged, the electric heating element can heat for a long time, and the temperature measuring device can effectively operate for a long time.

The invention discloses a solvent recovery process and system for butadiene oligomerization reaction. In the process, after the material to be purified from the butadiene oligomerization reaction is rectified by the first distillation tower, a first mixture is extracted from the tower top, and a second mixture is extracted from the tower bottom. After the second mixture is rectified by the second distillation tower, a third mixture is extracted from the tower top. The third compound is subjected to fractional condensation treatment to obtain a fourth mixture of gas phase and a fifth mixture of liquid phase. After the fourth mixture is rectified by the third distillation tower, a solvent is extracted from the tower top, and a seventh mixture is extracted from the tower bottom. A sixth mixture is extracted from the tower bottom of the second distillation tower. After the sixth mixture is rectified by the fourth distillation tower, CDT is extracted from the tower top, and heavy components are extracted from the tower bottom. The invention can effectively remove water and butadiene from the material after the butadiene oligomerization reaction, obtain COD and CDT products with a purity of not less than 99%, save energy consumption and equipment investment through thermal coupling treatment, and reduce the overall process operation cost.

The invention discloses a device for directly preparing sulfuric acid and hydrofluoric acid from rare earth concentrate roasting tail gas, which is characterized by comprising an absorption tower, a spray tower, a heat exchanger and a delivery pump, the lower parts of the absorption tower and the spray tower are respectively provided with a tail gas inlet, a circulating water inlet and a circulating water outlet, and the top is provided with an exhaust port; the upper part of the absorption tower is provided with a concentrated sulfuric acid inlet and a concentrated sulfuric acid outlet, an exhaust port of the absorption tower is connected with a tail gas inlet of the spray tower through a gas pipeline, and respective feed liquid outlets of the absorption tower and the spray tower are respectively connected with a heat exchanger and a delivery pump through feed liquid pipelines; and a circulating water outlet and a circulating water inlet of the heat exchanger are respectively connected with a circulating drainage pipeline and a circulating water supply pipeline through circulating pipelines. The invention further discloses a process for directly preparing sulfuric acid and hydrofluoric acid from the rare earth concentrate roasting tail gas. The hydrofluoric acid of sulfuric acid in the rare earth concentrate roasting tail gas can be directly separated and recycled, and the whole technological process is shortened.

This invention proposes a method for treating and reusing lead-zinc ore beneficiation wastewater. The method includes pretreatment of the raw ore to obtain a raw ore slurry, followed by a flotation process. The flotation process includes lead flotation of the raw ore slurry and zinc flotation of the lead flotation tailings. The resulting lead concentrate slurry, zinc concentrate slurry, and tailings slurry undergo solid-liquid separation using reagents and a thickener. Wastewater overflowing from the thickener is transported to a mixing tank for collection. The outlet of the mixing tank is connected to the inlet of an adsorption tower group, and the wastewater overflows into the adsorption tower group. After adsorption, the wastewater overflows into a pump tank, where sodium sulfide is added. The wastewater is then pumped to a high-level water tank and finally reused in the flotation process. This method avoids the investment in large-scale water treatment equipment, uses conventional water treatment reagents, is environmentally friendly and economical, requires small amounts, and is widely available, reducing water treatment operating costs and reagent consumption. The process specifically treats wastewater and has broad application prospects for achieving zero discharge of non-ferrous metal beneficiation wastewater.

The invention discloses preparation and application of a metal-doped carbon nanotube, and the preparation method comprises the following steps: firstly mixing a multi-walled carbon nanotube with dicyandiamide, then adding ferric acetylacetonate for doping, and then carrying out high-temperature pyrolysis to obtain the metal-doped carbon nanotube. The obtained metal-doped carbon nanotube is used as a catalyst for a free chlorine Fenton oxidation process, the powder is easy to recover, and the material is stable and free of secondary pollution. Due to the low catalyst dosage, the process operation cost is reduced, and the situation that the stability of the catalyst is reduced due to excessive oxidation of an oxidizing agent is avoided.

The application discloses a biological sludge recycling type sewage treatment reaction device, and relates to the technical field of sewage treatment. The device comprises a pool body, the inner part of the pool body is fixedly connected with a first partition plate, a second partition plate and a connecting plate respectively, the pool body and the first partition plate form an anaerobic zone, and the first partition plate, the second partition plate and the pool body jointly form an anoxic reaction zone. In the application, the sludge quality separation and reflux system is matched with the gradient sedimentation assembly through the spiral separator, the reinforced cyclone hydraulic field is formed in the anaerobic zone by means of the spiral flow channel with a narrowing inner diameter from top to bottom, the centrifugal force is used to make the inert sludge and heavy particles with a larger density migrate to the pool wall and sink to the sludge hopper to complete in-situ concentration, the preliminary sludge separation is realized, the separation load of the subsequent sedimentation unit is effectively reduced, the mixed contact of the sewage and the anaerobic sludge is strengthened by the cyclone state water flow, a stable anaerobic environment is created for the phosphorus accumulating organisms, and the phosphorus accumulating organisms are promoted to release phosphorus efficiently.

This utility model belongs to the field of coal chemical wastewater pretreatment technology, and discloses a resource substance recovery system for coal chemical wastewater, including an adsorption separation system, an adsorption material regeneration system, and a recovery and regeneration system. The adsorption separation system is used to adsorb and separate resource substances in the wastewater to be treated using adsorption materials. The resource substances in the wastewater to be treated include oils and phenols. The adsorption material regeneration system is used to regenerate the adsorption material using a regeneration solution. The recovery and regeneration system is used to regenerate the regeneration solution and separate and recover the adsorbed resource substances. This utility model achieves efficient separation of oils and phenols by filling the adsorption separation device with adsorption material. The adsorption material regeneration system provides a regeneration solution to the adsorption separation device to achieve elution and regeneration of the adsorption material, thereby realizing the recycling of the adsorption material and effectively reducing the recycling and treatment cost.