458results about How to "Eliminate secondary pollution" patented technology

The invention discloses an ammonia-carbon combined desulfurization and denitration method for sintering flue gas. The sintering flue gas is desulfurized through ammonia-containing absorption liquid and then is adsorbed through activated carbon; the activated carbon is obtained by roasting carbonaceous materials and metallic oxide sources at a mass ratio of 2: 1 to 5: 1 at 850-1100 DEG C; the carbonaceous materials refer to semicoke or a mixture of coal and biomass. In the method, ammonia is cooperated with the activated carbon prepared through the method in use, desulfurization and denitration can be effectively achieved, secondary pollution is reduced, the process is cut short, and the treatment cost is reduced.

The invention discloses a synthetic processing recycling reusing method of residual dining rubbish, which comprises the following steps: cutting to remove package bag, waste table cloth and plastic bag; vibrating and sieving to pick chopstick; using magnet to attract bottle cap; washing the separated materials mechanically; collecting splitly; boiling main solid material under 130-150 deg. c for 30-60 min; squeezing the boiled material to separate solid from liquid; proceeding oil-water separation for the squeezed water and oil through centrifuging; doing anaerobic ferment for the waste water to produce methane; esterifying waste oil and carbinol to prepare fatty acid methyl ester. The invention eliminates secondary pollution during environmental protection and disposal, which is a reasonable, industrial, scaling, non-harmful, resourcing disposing pattern for the dining rubbish with good applying prospect.

The invention belongs to the technical field of environment protection, and relates to a device and a process for temperature difference crystallizing ammonia process desulfurization, which is especially suitable for the ammonia process modification and newly-built desulfurization of the original calcium process desulfurization device. The device comprises a desulfurization tower, a densifying device, a gas-liquid heat exchanger, a circulating pump, a concentration circulating pump, a magma pump, a concentration crystallization tank and a drying system, wherein the desulfurization tower, the circulating pump, the magma pump and the drying system adopt the devices in the original calcium process desulfurization; the lower part of the densifying device is provided with a gas distributor, andthe upper part thereof is provided with spray heads which are arranged in 2-3 layers; spray heads in the desulfurization tower are arranged in 2-4 layers, a liquid supplementation pipe is connected with the spray heads at the lowest layer in the desulfurization tower; the concentration crystallization tank is a tank with a conical bottom part; and the upper part of the concentration crystallization tank is provided with a pipeline to be connected with the bottom of the densifying device, the middle of the concentration crystallization tank is provided with a pipeline to be connected with theconcentration circulating pump, and the bottom is provided with a pipeline to be connected with the magma pump. The invention can farthest utilize the original devices on the premise of guaranteeing the normal desulfurization efficiency, thereby saving the investment, reducing the energy consumption and eliminating the secondary pollution.

The invention relates to a process for separating and recovering heavy metallic salt and inorganic acid in pickling waste liquid by a membrane method, which comprises the following concrete steps: filtering and removing solid suspended substances in pickling waste liquid through an inorganic ceramic membrane; separating acid from salt in the ceramic membrane penetrating liquid through diffusion dialysis; and heating the dialysis liquid of a diffusion dialyzer, then introducing the dialysis liquid into a nanofiltration membrane, and cooling and crystallizing the concentrated liquid of a nanofiltration device and then centrifuging the crystal of the concentrated liquid to obtain iron salt, wherein the penetrating liquid of the nanofiltration device passes through a reverse osmosis membrane device, the concentrated liquid of the reverse osmosis device returns to a pickling section, and the water discharged from the reverse osmosis device enters a diffusion dialysis section for recycling. The invention has the characteristics that the pickling waste liquid is completely used as resources, the recovery process is simple, the recovery ratio of metallic salt and acid is high, and water is recycled. The process of the invention can be coupled with various pickling sections to realize continuous and stable automated operation, and the supplemented acid amount can be quantitatively controlled according to the acid amount consumed by the crystallized metallic salt.

The invention provides a production method of a foam slurry core-filled building block capable of being quickly condensed under a steam-curing-free condition, belonging to the technical field of building block production. The invention aims to provide an automatic production method for producing a foam slurry core-filled building block under a steam-curing-free condition. The technical key points are as follows: the production method sequentially comprises the following steps of: preparing materials, molding, carrying out primary maintenance, carrying out foam slurry core filling, carrying out secondary maintenance, stacking, naturally maintaining after stacking, and returning a supporting plate; after molding a hollow building block by carrying out material preparation and molding, entering the primary maintenance step; after the hollow building block has a certain strength, entering the foam slurry core filling step to inject slurry to form a core-filled heat-preservation building block; then, carrying out the secondary maintenance; after the foam slurry is condensed, entering the stacking step and the natural maintenance step after the stacking step; then, entering the natural maintenance step; after stacking, returning the supporting plate back to the building block molding step through the step of returning the supporting plate; and then, carrying out the next cycle of circulation.

The present invention provides a method for recovering lead oxide from waste containing lead oxide. The method comprises: (1) contacting waste containing lead oxide and a complexing agent solution, and carrying out solid-liquid separation on the contacting mixture to obtain the lead-containing filtrate and the filter residue; (2) carrying out a reaction of the lead-containing filtrate and a precipitating agent, carrying out solid-liquid separation on the obtained reaction product to obtain a lead salt precipitate and a regenerated complexing agent filtrate, and returning the complexing agent filtrate to the dissolving process of the step (1); and (3) carrying out desalination decomposition on the lead salt precipitate to obtain PbO. With the method of the present invention, the PbO in the waste containing lead oxide can be efficiently and selectively recovered, the impurities can be effectively removed, and the high-purity PbO can be obtained.

The invention provides a semi-automatic production method of foam slurry core-filling building blocks, belonging to the technical field of building block production, and adopting a combination way of mechanical production, manpower push, fully automatic slurry injection and natural maintenance to produce new type compound insulating building blocks. The key technical point is that raw materials are conveyed to in a building block shaping machine 4 through a batching machine 1, a stirring machine 2 and a concrete belt conveyor 3; and the building blocks are conveyed to a block folding machine 6 by a building block conveyor 5 after being shaped, conveyed to a primary maintenance field 8 for the natural maintenance by manpower through a forklift 7 after being folded into a plurality of layers, conveyed to a building block decoding layering conveyor 10 by manpower through a forklift 9 after having certain strength, conveyed to a building block conveyor 11 layer one layer so as to be injected with slurry by a foam slurry core filling machine, then conveyed to a block folding machine 13, conveyed to a second maintenance field 15 for the natural maintenance by the manpower through a forklift 14 after being folded into a plurality of layers, and finally conveyed to a storage yard by the manpower through a forklift 16 to pile up for further natural maintenance after the solidification of the foam slurry.

The invention discloses a biological sediment modifier for a fishpond, belonging to the technical field of water quality purification of fishponds. The biological sediment modifier is prepared from the following raw materials in parts by weight: 3-8 parts of bacillus subtilis powder, 3-8 parts of nitrifying bacteria powder, 3-8 parts of denitrifying bacteria powder, 3-8 parts of sulfurizing bacteria powder, 10-40 parts of zeolite powder, 40-70 parts of sodium humate, and 0.5-3 parts of calcium peroxide, wherein the total content of viable bacteria is 2*10<8>-2*10<9> per gram. The biological sediment modifier disclosed by the invention can be used for absorbing the nutrition of sediment, and forming a bacterium membrane on the sediment via fermentation, breeding and bacterial community expansion, so as to cover the sediment and prevent the sediment from polluting water quality, thus benefiting the growth of aquatic animals, greatly increasing a degradation rate, and avoiding the secondary pollution of chemical degradation to a water body.

The invention belongs to a thallium-containing heavy metal wastewater advanced treatment method. The method comprises the following steps: (1) pretreating thallium-containing heavy metal wastewater: adjusting the pH value of wastewater to 9.5-11.5 with alkaline, and adding a chemical thallium removing agent according to the mass ratio of the chemical thallium removing agent to thallium of (0.5-1.5):1; (2) medicating according to the mass ratio of the chemical thallium removing agent to wastewater after the reaction in step (1) for 15-30 minutes, and carrying out mixed reaction for 15-30 minutes; (3) adding liquid alkaline into the solution obtained from the step (2), adjusting the pH value to 11.0-11.5, reacting for 10-20 minutes, adding 5-50g/m<3> of flocculating agents, reacting for 10-20 minutes, carrying out solid-liquid separation by oblique plate deposition or plate frame press filtration, standing for 1-2 hours, and discharging or recycling supernate. The thallium contained heavy metal wastewater treatment method is simple in process, has no secondary pollution, is high in treatment efficiency, runs stably and low in cost, and has very high practicability.

The invention discloses and provides a heavy metal polluted soil treatment system and process, aiming to solve the screening problem of magnetic heavy metal pollutants in polluted soil, which includes a first crushing and screening mechanism, a second crushing and screening mechanism, and a transfer and conveying mechanism And the lifting mechanism, through the oblique lifting and throwing of the heavy metal contaminated soil after the initial crushing to the screening rake with magnetic adsorption, the secondary crushing of the heavy metal contaminated soil is carried out by the screening rake, and the heavy metal contaminated soil is sucked out by magnetic adsorption The magnetic heavy metals contained in it improve the quality and efficiency of heavy metal pollutants in the subsequent treatment process.

The invention discloses a traditional Chinese medicine aldehyde-removing air purifying agent and a preparation method thereof. The air purifying agent is prepared from the following raw materials in parts by weight: 15-20 parts of holy basil, 10-15 parts of fiveleaf gynostemma herb, 10-15 parts of mint, 16-22 parts of folium eucalypti, 12-18 parts of cortex cinnamomi, 5-10 parts of fernleaf hedge bamboo, 8-14 parts of ficus benjamina, 15-20 parts of pomegranate leaves, 10-15 parts of green bonnie flowers, 6-12 parts of marigold, 13-19 parts of tuberose, 10-15 parts of litsea cubeba, 5-10 parts of mangnolia officinalis, 11-17 parts of radix dichroa, and 8-14 parts of honeysuckle. The aldehyde-removing air purifying agent is prepared from pure plants, can enable indoor toxic dust to be quickly precipitated, and can quickly remove methanal and other residual hazardous substances indoors or in furniture, the removal ratio reaches over 96%, and the secondary pollution is avoided; in addition, the harmful bacteria in indoor air can be inhibited and killed, and the pungent peculiar smell can be quickly removed; the air purifying agent contains no chemical preparation, is free from corrosion, non-toxic, free from contamination, convenient to use, safe and environmental-friendly, and causes no toxic or side effects on human bodies.

The invention discloses a rainwater collecting and recycling system for an urban green land and a plaza; the rainwater collecting and recycling system comprises the green land, roads around the green land and the plaza; the green land is of a sunken structure which is lower than the roads and the plaza; the plaza is of a dome structure which is slightly lower at four sides; and the roads are of arched structures which are higher at the middle and slightly lower at two sides; rainwater on the roads and the plaza enters a water collecting well which is connected with a covered filtering channel; the water drain end of the covered filtering channel is connected with an underground impounding reservoir; a concrete cover plate layer is arranged at the upper part of the impounding reservoir; the green land is arranged at the upper part of the concrete cover plate layer; a water pump is arranged in the underground impounding reservoir; and the water outlet of the water pump is connected with a green land irrigation spray head. The rainwater collecting and recycling system for the urban green land and the plaza relieves the pressures on sewage disposal, municipal water supplying and shortage of urban water sources, realizes rainwater recovery and gives full play to the ideas of energy conservation, emission reduction and sustainable development.

The invention discloses a biochar soil remediation agent and a preparation method thereof. The biochar soil remediation agent is prepared from titanium dioxide supported biochar, compost materials, compound fertilizer, a biological bacteria solution, clay, a binder and microelements; the preparation method of the biochar soil remediation agent comprises steps as follows: preparation of titanium dioxide supported biochar, preparation of the compost materials, preparation of the biological bacteria solution, preparation of the clay, preparation of a mixed material coated with biochar, pelletizing and drying. The preparation process is environmentally friendly and simple to operate, the raw materials are widely sourced, the prepared soil remediation agent not only can adsorb and degrade pollutants in soil, but also increases content of organic matter and microorganisms in the soil, and accordingly, economic benefit and environmental benefit are remarkably increased.

This invention discloses a method for treating acidic wastewater produced during titanium dioxide production by H2SO4 method by using quicklime. The method comprises: wet-grinding quicklime digestion dreg into 60 mesh slurry (90%), and pre-neutralizing the acidic wastewater of titanium dioxide with the slurry. The method has such advantages as high quicklime utility, and no secondary pollution.

A method for preparing coconut shell activated carbon with a silver controlled-release sterilizing function through hydrothermal reaction is characterized in that: using coconut shell activated carbon as a raw material and silver nitrate as an impregnating liquid, preparing silver-carried activated carbon through hydrothermal reaction, and forging at a high temperature under nitrogen protecting conditions to obtain the product. The operating technology has the main characteristics that the coconut shell activated carbon is used as the raw material, the absorption capacity is high, the speed is high, and the product is durable and regenerative; silver is more effectively loaded on the activated carbon through hydrothermal reaction preparation, and high specific surface area (1000m<2>/g) and high antibacterial activity (the sterilizing time of 107/mL is 35 minutes) are obtained; high-temperature forging is favorable to the reactivation of the silver-carried activated carbon, silver granules are more uniformly distributed on the surface of the activated carbon, and a silver controlled-release function is realized.

The present invention is process of treating mother liquid residue from sodium formate method to produce sodium hyosulfate and after being rectified to recover methanol. The process includes the following steps: 1. concentrating to obtain concentrated residue with or without sodium formate recovery; 2. incinerating the concentrated residue in a converter or one combined furnace to obtain incinerated clinker; 3. discharging high temperature clinker; 4. dissolving the clinker to form water solution; 5. absorbing SO2 from the incinerating fume with the water solution; and 6. adding sulfur to the absorbed solution to prepare sodium thiosulfate. The process can eliminate pollutant while producing sodium thiosulfate as chemical material.

The present invention relates to an air purifier, in particular to a water washing type air purifier. The present invention resolves the problems of the prior devices, including low concentration of attached pollutants and incapability of thoroughly eliminating the secondary pollution. First nozzles are communicated with a buffer tank through a pipeline; an ozone water machine is communicated with the buffer tank through a pipeline; the bottom of the buffer tank is provided with a first drainpipe, which is provided with a first drainage control valve; an exhaust pipe is arranged on the top of a purification tower; the inflow end of a waste pipe is connected with the bottom of the purification tower; the outflow end of the waste pipe is arranged inside the buffer tank; and a first purifier arranged in the purification tower is inclined relative to the horizontal plane of the purification tower at an angle between 10 degrees and 15 degrees. The air purifier utilizes the ozone water produced by the ozone water machine to clean and disinfect the foul air in the purification tower, thus cleaning out pollutants, and since the first purifier is obliquely arranged in the purification tower, the disinfected sewage can flow into the buffer tank, so the secondary pollution is eliminated.

The invention provides a method for preparing light ceramsite by adopting DSD acid industrial sludge, which is characterized in that the following raw materials are utilized in the method: DSD acid sludge, binders, fluxing agents and expanding agents. The method comprises the following steps: (1) respectively grinding the dried DSD acid sludge and the binders and sieving the substances with 100-mesh sieves; (2) sieving the fluxing agents and the expanding agents with 300-mesh sieves; (3) weighing the binders, the fluxing agents, the expanding agents and the dried DSD acid sludge in a weight ratio of 3-5:0.5:0.5:4-6 and pelletizing the substances in a drum-type pelletizer with water as an adhesive to prepare raw pellets with the diameter being about 5mm; (4) drying the raw pellets at normaltemperature; (5) placing the raw pellets into box-type resistance furnaces, transferring the raw pellets into tube-type resistance furnaces to be fired after preheating and cooling the ceramsite at room temperature, thus obtaining the DSD acid sludge light ceramsite. The method lowers the cost on sludge treatment, avoids environmental pollution and features simple preparation process. The prepared DSD acid sludge light ceramsite has the characteristics of light weight, low water absorption, large specific surface area and the like.