92results about How to "To achieve the goal of zero emissions" patented technology

The invention relates to a method of recycling valuable metals from arsenic-containing soot. The method comprises the following steps: (1) mixing acidic wastewater with white soot, controlling the pH value to 2.5-3.0, performing acid leaching at a temperature of 70-80 DEG C, and filtering to obtain leachate and lead slag; (2) replacing indium for the leachate by using zinc powder, and filtering to obtain indium slag; (3) performing rotational-flow electrodeposition arsenic removal and zinc removal on filtrate in sequence to obtain arsenic slag and zinc slag. The method disclosed by the invention can be used for purifying the acidic wastewater to reach a condition for recycling the acidic wastewater to a smelting acid manufacturing and purifying section, so that the treated acidic wastewater can be directly returned to the acid manufacturing and purifying section, and therefore, the gypsum slag is completely removed to truly achieve the purpose of zero emission. Meanwhile, the method disclosed by the invention can also be used for achieving the treatment of white soot and recycling the valuable metals, so that environmental protection and resource comprehensive utilization are achieved.

The invention discloses a method for cooperatively promoting agglomeration growth of PM (particulate matter) 2.5 and treating desulfuration wastewater in an evaporation manner and a device of the method. The method particularly includes steps that agglomeration liquor prepared by desulfuration wastewater, high polymer adhesive and wetting agent is sprayed into an inlet flue of an electric precipitator and is evaporated by the aid of heat of flue gas, in an evaporation process, the wetting agent promotes dust to enter drops of the agglomeration liquor, the high polymer adhesive is connected with PM2.5 via a polymer chain with polar groups, the grain diameter of the PM2.5 is prompted to be enlarged, so that the PM2.5 can be gathered by the follow-up electric precipitator, the desulfuration wastewater is evaporated completely, suspended matters and dissolvable pollutants in the wastewater are converted into solid to be dissolved out, and the suspended matters and the dissolvable pollutants in the wastewater, together with dust in the flue gas, are gathered by the electric precipitator. The device consists of a boiler, an air preheater, the electric precipitator, a desulfurizing tower, a hydraulic cyclone, a desulfuration wastewater clarification tank and an agglomeration liquor preparation tank, and a double-fluid atomizing nozzle is arranged in the flue between the air preheater and the electric precipitator.

The invention discloses a high-salt iron phosphate liquid waste zero-emission treatment device. The device structurally comprises a pre-treatment (PT) system, a reverse osmosis (RO) treatment system and an evaporative crystallization (VC) treatment system. The high-salt iron phosphate liquid waste zero-emission treatment device has the advantages as follows: the device is designed for high salt of the high-salt iron phosphate liquid waste, the high-salt iron phosphate liquid waste is subjected to pre-treatment to remove part of suspended solids and is subjected to reverse osmosis desalination, concentration reduction and reverse osmosis producing water recycling, reverse osmosis concentrated water is subjected to evaporative crystallization treatment finally, condensate water produced through evaporative crystallization is recycled, waste salt is conveyed outwards, and the purpose of zero liquid emission is achieved. The high-salt iron phosphate liquid waste zero-emission treatment device has the specific advantages as follows: pre-treatment, reverse osmosis and evaporative crystallization are organically combined; 2, the reverse osmosis is adopted for concentration reduction, so that the cost of follow-up evaporative crystallization is reduced; 3, an evaporative crystallization technology combining falling film evaporation and MVR (mechanical vapor recompression) is adopted, energy is saved, the efficiency is high, and the operation cost is reduced; 4, the purposes of water recycling and zero liquid emission are achieved.

The invention discloses a recovery method for mother liquor after copper chloride hydroxide production by etching waste liquor, which is characterized in that the mother liquor of the etching waste liquor after the copper chloride hydroxide production is firstly neutralized, precipitated and filtered, the rest liquor sequentially passes through an ion exchanger filled with ion exchange resin and ion exchange resin fibers, then, the exchange liquor is evaporated, evaporation mother liquor and condensed water are obtained, ammonium chloride is obtained after evaporation mother liquor cooling, and ammonia nitrogen contained in the condensed water is removed through an efficient ammonia nitrogen regeneration reactor. In the second exchange liquor treated by the recovery method, the copper content is less than 5mug/L, and the content of the ammonia nitrogen passing through the efficient ammonia nitrogen regeneration reactor is less than 10mg/L. The etching waste liquor treated by the method has the advantages that copper ions are recovered in the form of copper chloride hydroxide, the ammonia is recovered in the forms of ammonia chloride and ammonia water, the waste water can also reach the industrial application standard to be cyclically utilized, and the goal of zero waste emission is realized.

The invention relates to a swine fermentation bed and a preparation method thereof. The swine fermentation bed contains a fermentation bed packing and a fermentation bed fungicide, wherein the fermentation bed packing per cubic meter is prepared from, by weight, rice husk 10-15 kg, sawdust 20-25 kg, vinasse 15-20 kg, straw 10-15 kg, rice bran 5-8 kg, corn meal 5-8 kg, rapeseed cake 4-6 kg, tea residues 3-5 kg, sediment 5-8 kg, wormcast 5-8 kg, wormwood 0.3-0.5 kg, Chinese fever vines 0.3-0.5 kg, garlic powder 0.1-0.3 kg and salt 0.5-0.8 kg. The fermentation bed fungicide is indigenous rhizobia, and the usage amount is 0.2-0.3 kg per cubic meter. The fermentation bed prepared by adopting the preparation method is reasonable in composition, straw is laid on the bottom layer of the fermentation bed, the thickness of the packing can be decreased, the temperature of the fermentation bed can be also kept, the Chinese herbal medicines are added to the composition, have the disinfection effect on swine excrement and meanwhile can promote proliferation of beneficial bacteria in swine intestinal tracts to promote growth, the environmental pollution brought by breeding is relieved by adopting the fermentation bed, and the purpose of zero breeding emissions is really achieved.

The invention discloses a production method for synthesizing an ammonium bicarbonate fertilizer by using CO2 waste gas, which comprises the following steps of: using a process which adopts countercurrent contact to prepare the CO2 waste gas and strong ammonia water after tail gas dedusting and desulfurization into ammonium bicarbonate; reclaiming ammonia gas in the previous process step by using an ammonia reclaiming tower; and discharging remaining tail gas into the atmosphere directly, wherein the ammonia water in the process is concentrated in a reverse osmosis system and is used for recycling again. The greenhouse gas CO2 in the method is treated, so the discharge amount of the greenhouse gas is reduced; the generation of the ammonium bicarbonate fertilizer in the production process has economic benefits; and the production method adopts a reverse osmosis technique to concentrate diluted ammonia water and recycle the strong ammonia water and dialysis water so as to fulfill the aim of zero discharge.

The invention relates to sewage treatment and solid waste treatment in the environmental engineering field and aims at recycling the excess sludge in a sewage treatment plant. A hydrolyzed solution, which is obtained after the sludge is hydrolyzed, can be used as a flocculating agent which directly flows back for sewage treatment; a calcium chloride solution can be added into the hydrolyzed solution, so that supernatant liquor which contains the biological flocculating agent and bottom sediments which mainly comprise inorganic matters and a small amount of unhydrolyzed organic matters are separated; a crude flocculation solution is obtained by centrifuging the supernatant liquor which contains the flocculating agent; and a flocculating agent crude product can be obtained after the crude flocculation solution reacts with acetone and a reaction product is centrifuged. After being treated, the bottom sediments which mainly comprise the inorganic matters and a small amount of unhydrolyzedorganic matters can be used as a chemical fertilizer. In the invention, after being treated, the sludge is recycled, the purpose of zero sludge discharge is achieved finally, the sludge treatment problem of the sewage treatment plant is thoroughly solved, the cost of water treatment is lowered and the environmental pollution is reduced.

The invention relates to a zero emission treatment method for reverse osmosis concentrated water difficult to decompose. The method comprises the following steps: (a) creation of a treatment system; (b) adsorbing treatment by using an activated carbon filter bed; (c) filtering treatment by using an ultrafiltration component and a second-level reverse osmosis component; (d) electric treatment by using an electrocatalytic oxidation module and a capacitive deionization module; the reverse osmosis concentrated water difficult to decompose is finally treated into fresh water and strong brine, the fresh water is recycled, the strong brine is evaporated to dryness, so that the purpose of zero emission is fulfilled. Meanwhile, the invention further discloses a special treatment system using the treatment method. The special treatment system is simple in structure; the treatment method is easy in operation; the treatment cost is low, and the purification efficiency is high; the reverse osmosis concentrated water difficult to decompose, especially waste water from a petrochemical enterprise, is completely purified to achieve zero emission; the popularization and application of the treatment method and the special treatment system on a large scale has a very high social benefit.

The invention relates to a method for preparing vanadium trioxide from a vanadium-containing solution. The method comprises the steps of introducing CO2 and H2 into the vanadium-containing solution, carrying out a reaction under heated and pressurized conditions, and carrying out solid-liquid separation after the reaction is completed, thereby obtaining solid vanadium trioxide and a separated solution. According to the method disclosed by the invention, the gas mixture of CO2 and H2 is adopted to react with the vanadium-containing solution, so that the technical problem that a reduction reaction is difficult to carry out due to the fact that sodium hydroxide is produced in a hydrogen gas reduction process of vanadate is solved; the efficiency of reduction of the vanadate is increased, and the vanadium trioxide product with the purity higher than 99% is obtained; and meanwhile, the generation of ammonia nitrogen wastewater is effectively avoided, the cyclic utilization of water resources is achieved, and the aim of zero wastewater emission is achieved. The method has the characteristics of short process flow, high production efficiency, high-end product, environment-friendliness, low cost and the like and is applicable to industrialized popularization.

The invention discloses a cold region livestock and poultry breeding sewage treatment method. The cold region livestock and poultry breeding sewage treatment method comprises following steps: S1, sewage is delivered through a filtering basin, wherein filtering is carried out at a water inlet, a middle part, and a water outlet of the filtering basin using a filter screen; S2, after filtering, low temperature decomposition microorganism colonies are added into water for 3 to 5 days of reaction; S3, the processed water is subjected to coagulation, deposition, and filtering treatment; S4, after coagulation and filtering treatment, the water is delivered into an ozone reaction device, ozone is added for 4 to 5min of ozonization; S5, after ozonization, the processed water is delivered into a biological contact oxidation pond for 0.5 to 1h of biological contact oxidation; and S6, the water processed via biological contact oxidation is delivered into an anaerobic pond, is heated to 15 to 20 DEG C with solar energy, low temperature decomposition microorganism colonies are added at the same time, and the water is subjected to reaction for 5 to 7 days; and S7, disinfection is carried out using an ultraviolet ray sterilizer so as to obtain water for up-to-standard discharge. The cold region livestock and poultry breeding sewage treatment method is simple, is high in efficiency and low in cost, and is capable of solving water pollution problems caused by livestock and poultry breeding.

The invention relates to the technical field of papermaking and particularly relates to a pulp residue treating and recycling system. The system comprises a fine screen tail slurry collecting tank, a reverse residue separator, a first concentrator, a disc mill, a fine screen, a second concentrator, a thermal dispersion device, a residue separator tailing collecting tank, a press filter, a high-concentration residue separator, a white water clarifier, a gravity bed, a residue extracting machine, a residue squeezing machine, a sludge sump and a pyroelectric incinerator. According to the pulp residue treating and recycling system, un-dispersed fiber bundles in residue separator tailings and fine screen tail slurry can be scattered and dispersed again, and lightweight bubbles can be separated; and meanwhile, non-fibrous components such as sand and fine ashes can be further separated from the residue separator tailings and the fine screen tail slurry, so that the pulp residue treating and recycling system has the advantages that fiber loss can be reduced, the content of organic matters in discharged sewage is reduced, the sewage treatment load is reduced greatly, and finally, the energy-saving and environment-friendly social benefits are achieved.

The invention discloses a multi-path recycling method for wastewater produced in acid-making with smelting gas, which belongs to the technical field of chemical engineering. The method comprises the steps of firstly performing discharging reduction on the acid wastewater by an internal circulation concentration method of a purification system, treating the acid wastewater by a process of primary vulcanization, neutralization and secondary vulcanization to remove heavy metals, arsenic, sulfuric acid, iron and zinc in the acid water in sequence, according to market demand, producing magnesium sulfate heptahydrate by cooling crystallization, and preparing sulfuric acid solution by evaporation concentration, thus realizing the ultimate goal of zero acid wastewater discharging. The process flow is reliable and can be used for recycling the acid water in two different ways; operating cost is low, new produced waste quantity is small, multiple products can be produced for generating profit, slag generated in different stages has different utilization values, and the aim of multi-path recycling of the acid wastewater is truly realized.

The invention provides a large-scale livestock breeding sewage treatment method. The large-scale livestock breeding sewage treatment method comprises the following steps of: step a. carrying out physicochemical treatment on livestock breeding sewage by adopting a chemical agent, so that soluble ammonia nitrogen and phosphorus in the livestock breeding sewage form ammonium phosphate crystals, then removing the ammonium phosphate crystals formed in the sewage and suspended organic pollutants together through flocculation; step b. carrying out biochemical treatment on the sewage treated in the step a, and further removing soluble organic pollutants in the sewage; and step c. using a part of treating water treated in the step b as flushing water for colony houses of livestock, thus realizing the cyclic utilization of sewage. The invention also provides large-scale livestock breeding sewage treatment equipment. The large-scale livestock breeding sewage treatment equipment provided by the invention can be used for preventing pollution caused by livestock sewage breeding and realizing recycle processing and cyclic utilization of breeding sewage.

The invention discloses an industrial waste treatment technology and a device thereof. A method comprises the steps that hazardous waste of tar and the like is subjected to incineration, high-concentration high-salinity sewage is subjected to incineration, the two segments of incineration are combined to form a secondary complete incineration system, hazardous pollutants are removed, and the solidhazardous waste is treated when sewage incineration is conducted; meanwhile, high-temperature waste heat and medium-temperature waste heat are recycled, so that the sewage treatment cost is reduced;an integrated sewage concentration system is adopted, so that the sewage incineration quantity is reduced by 40%-60%, the sewage treatment cost can be saved by 30% or above, the direct cost of sewageincineration is reduced, whole system energy consumption is low, and sewage treatment recycling is achieved.

The invention provides a zero release device of high-salt high-ammonia-nitrogen waste water. The zero release device is mainly used for solving problems of conventional devices that discharge standards are not reached, and water resource recovery rate is low in high-salt high-ammonia-nitrogen waste water treatment. The zero release device is a membrane coupling device, and mainly comprises a membrane absorption unit, a nanofiltration unit, a forward osmosis unit, and a cooling crystallization unit; the membrane absorption unit is connected with the nanofiltration unit, the nanofiltration unit is connected with the forward osmosis unit, the forward osmosis unit is connected with the membrane absorption unit and the cooling crystallization unit, and a plurality of circulation loops are formed via connection of the units. The zero release device is easy for operation, and is easy for realization. The zero release device can be used for solving processing problems of high-salt high-ammonia-nitrogen waste water effectively, water recovery rate is high, and quality of obtained water is high. The zero release device is used for circulating condensation of high-salt high-ammonia-nitrogen waste water, almost no concentrated water is discharged, and recovery of water resource of high-salt high-ammonia-nitrogen waste water is realized as far as possible.

The invention relates to a zero-discharge recycling treatment device for wastewater with high salinity and high organic substance content, relates to the technical field of treatment of high-salinity wastewater and solve the technical problems that treatment is large in investment and high in operation cost and cannot realize expected purification effect in the prior art. The zero-discharge recycling treatment device for wastewater with high salinity and high organic substance content comprises a cathode chamber circulating unit, a recycling module and an anode chamber circulating unit, wherein wastewater entering the recycling module can be subjected to a redox reaction by means of a membrane stack in the recycling module, so that the chemical oxygen demand can be reduced, and organic substances in the wastewater can be degraded effectively; besides, salts in wastewater can be recycled well by means of electrochemical principles, and zero-discharge recycling is realized.

The invention relates to a lampblack depuration machine comprising a housing. A water container is arranged in the housing. The water container is connected to a blower through a pipe. The blower is connected to a lampblack hood through a pipe. The water container is connected to a water inlet pipe and a water overflow pipe which is positioned above the water inlet pipe. A waste discharge pipe is arranged on the bottom of the water container. An exhaust vent is arranged on the upper part of the water container. With the lampblack depuration machine provided by the invention, environment pollution caused by lampblack and dust is solved, and harmful gas zero discharge is realized. The lampblack depuration machine can be widely applied in domestic kitchens and catering operating rooms of restaurants, hotels, and canteens. The lampblack depuration machine can also be used in factories and hospital infectious disease areas.

The invention provides a rare earth heavy metal waste liquid treatment method, relates to the field of wastewater treatment, and aims at providing a clean production method for achieving heavy metal wastewater zero discharging. The rare earth heavy metal waste liquid treatment method comprises the following steps of 01 diffusing dialysis; 02 pretreatment, wherein pretreatment comprises the following steps of 021 alkali neutralization, 022 nanofiltration and separation, 023 SS adsorption, 024 Na resin softening and 025 homogeneous electrodialysis; 03 bipolar membrane electrodialysis.