51results about How to "Avoid secondary environmental pollution" patented technology

The invention discloses a contaminated soil repair method and a repair device. The repair method comprises the steps of (S1) vacuum thermal separation: performing thermal separation on soil in a vacuum environment so as to separate hazardous substances, and purifying the hazardous substances; (S2) chemical washing: chemically washing the soil on which the vacuum thermal separation is performed; (S3) reduction treatment: adding a reducing agent to the soil on which the chemical washing is performed; (S4) repair: applying a soil repair agent to the soil on which the reduction treatment is performed; (S5) stabilizing treatment: applying a heavy metal cadmium stabilizer and a microbial agent to the repaired soil; and (S6) improvement and maintenance: improving and maintaining the stabilized soil. According to the contaminated soil repair method, the contaminated soil can be thoroughly repaired once with low cost and high efficiency.

The invention provides a preparation method of composite envelope water retaining and slowly-releasing urea. The water retaining and slowly-releasing urea of a dual-layer film structure is formed with large granular urea as a kernel, a chitosan-polyving akohol composite film as an inner coating layer and a water-retaining agent as an outer coating layer, and the water retaining and slowly-releasing urea has excellent water retaining and nutrient slowly releasing properties. The method is characterized by comprising the steps that the large granular urea with the diameter of 2-5 mm is put into a coating device, the urea rolls in the coating device and is heated to be 80-100 DEG C, chitosan-polyving akohol coating fluid is sprayed to the surface of the urea, the water-retaining agent of the grain size of 0.075 mm is added, epoxy chloropropane with the concentration of 0.5% is sprayed by a spraying gun with the intensity of pressure larger than or equal to 0.4 MPa for the surface cross-linking reaction, and finished fertilizers are obtained after drying is performed. The water retaining and slowly-releasing urea is simple in production process, low in investment cost, and easy in industrial production. No organic solvent is used in the production process, and secondary pollution caused by using organic solvents is avoided accordingly.

The invention relates to an industrial wastewater and municipal wastewater processing method. The sewage treating apparatus comprises: TR1, TR2, TR3 and TR4 on-line water processor units which grind pulp in the pulping process and in the primary and second pulp washing process; a flocculating filtration apparatus, a mechanical filtration apparatus, a secondary filtration apparatus and a hyperfiltration apparatus which process the water in the bleaching and rinsing process; and a desalinisation processing apparatus TR5 which ensures the final desalinisation of the circulating water. The processing method changes the fluid form in the whole process after adding the flocculant in the wastewater. In the biochemical polymerization reaction and mechanical physical movement process, the polluting factors rapidly generate the flocculation dissociation in the flow process, thus making the tiny microparticle impurities generate the agglomerate which is convenient for filtration, hydrophilic and insoluble and dewatering the pollutant to be sorted into dry matters. The invention has the advantages of low equipment investment, no waste liquid discharge and remarkable economic benefit. The processed water is used in cycle. The invention is applied to paper-making pulping, municipal wastewater and industrial wastewater process.

Disclosed is a laminated floor using a poly lactic acid (PLA) resin, of which a surface layer is formed of the PLA resin, thereby being environment-friendly and providing soft feeling and excellent workability. The laminated floor using a PLA resin, which is constructed on floor, includes a bottom layer formed of a HDF or MDF; and a surface layer comprising a reinforcement layer, a printed layer, a transparent layer and a surface treatment layer which are stacked on the bottom layer, wherein one or more of the reinforcement layer, the printed layer, the transparent layer and the surface treatment layer are formed of the PLA resin.

The invention discloses a high-molecular coagulation cohesive dust suppression agent and a preparation method thereof. The dust suppression agent is prepared from the following components: 0.5-1.0% ofhydroxyethyl cellulose, 1-2% of polyacrylamide, 2-4% of itaconic acid, 0.01-0.03% of an initiator, 0.01-0.02% of a cross-linking agent, 0.01-0.02% of an anti-freezing agent, 0.01-0.02% of a surfactant and the balance water. The dust suppression agent and the preparation method thereof have the advantages that the hydroxyethyl cellulose serves as a matrix and is subjected to graft copolymerizationreaction with the polyacrylamide, so that the frictional resistance of a solution is reduced, the liquidity of the solution is improved, then a proper amount of itaconic acid is grafted to enable thesolution to become colloid with relatively good liquidity and diffusivity, the anti-freezing performance of the dust suppression agent is improved by adding a small amount of anti-freezing agent, dust can be covered, a dense coating is formed on the surface of the dust, after the dense coating becomes dry and hard, the dense coating and dust together form a hard shell, the dust suppression agenthas the advantages of being non-toxic, environmentally friendly, low in price and biodegradable, and secondary environmental pollution is avoided.

The present invention is synergistic furaldehyde-degrading ultrasonic wave and nanometer TiO2 method. The method features that nanometer TiO2 is first dispersed inside furaldehyde solution or loaded on carrier and suspended inside furaldehyde solution, and H2O2 solution is added; and the furaldehyde solution is then ultrasonic treated for being degraded into harmless CO2 and water. The method of the present invention can decarbonylate furaldehyde in 60 min and degrade furaldehyde into harmless CO2 and water in 3 hr, and has excellent application foreground in degrading waste water containing toxic furaldehyde and other harmful compound.

The invention mainly discloses hollow glass, comprising two pieces of glass, a hollow layer formed between the two pieces of glass, a separation frame containing a drying agent, an inner-layer sealant, a metal section and an outer-layer seal structural adhesive, wherein the separation frame surrounds the hollow layer, the two sides of the separation frame are adhered to the two pieces of glass by using the inner-layer sealant to form the closed hollow layer, the outer side of the separation frame and the two pieces of glass form a groove, the metal section is arranged in the groove, and the outer-layer seal structural adhesive is filled between the metal section and the groove. Under the condition of meeting various performance indexes of original hollow glass, after being applied to a curtain wall in a later stage, the hollow glass has the advantages of saving auxiliary frames and other materials of curtain wall glass and avoiding secondary pollution caused by adhesion of the auxiliary frames.

The invention relates to multifunctional separation equipment for high-temperature biological mixed gas. A heat exchange chamber and a static separating chamber are arranged in a shell; both ends of heat exchange pipes in the heat exchange chamber are respectively communicated with a biological gas outlet at the top part of the heat exchange chamber and a biological mixed liquor outlet at the bottom part of the heat exchange chamber; a high-temperature biological mixed gas inlet arranged in the side wall of the shell is communicated with the bottom ends of the heat exchange pipes; the static separating chamber is divided into a left chamber and a right chamber by a partition plate in the static separating chamber; the lower parts of the two chambers are communicated; a biological mixed liquor inlet is located above one of the two chambers; a biological light tar outlet is arranged above the side wall of the chamber provided with a biological mixed liquor inlet; a biological acetic acid outlet is arranged above the side wall of the other chamber; and the bottom part of the static separating chamber is provided with a biological heavy tar outlet. As corollary equipment of a pyrolysis comprehensive conversion and utilization system for biomass waste resources, because solid purification and separation equipment, liquid purification and separation equipment and gas purification and separation equipment are integrated, the multifunctional separation equipment for the high-temperature biological mixed gas has a compact structure and less occupied space. Secondary pollution and wastes of secondary transformation resources in the transformation process are eliminated.

The invention discloses a SO3 online measurement system and method in flue gas. A sampling port of a heat-tracing sampling device is inserted into a flue, an outlet of the heat-tracing sampling devicecommunicates with an inlet of an electrochemical measurement system, a flue gas outlet of the electrochemical measurement system communicates with the inlet of a flue gas dump pump through the flue gas flow measurement device; the outlet of the flue gas dump pump communicates with the flue gas inlet on a flue wall surface; an absorption liquid outlet of the electrochemical measurement system communicates with the inlet of the absorption liquid conveying pump through an absorption liquid flow measurement device, and the outlet of the absorption liquid conveying pump is divided into two paths;one path communicates with the absorption liquid recycling device, and the other path communicates with the inlet of the absorption liquid atomizing device; a control end of the heat-tracing samplingdevice, a control end of a filter back-flushing device, an output end of the absorption liquid flow measurement device and the output end of the flue gas flow measurement device are connected with a controller. The system and method disclosed by the invention can accurately measure the SO3 concentration in the flue gas in real time.

The invention relates to the technical field of microbial remediation devices, and discloses a recycling, repairing and stirring device for biogas fermentation. The recycling, repairing and stirring device comprises a shell, a button is fixedly connected to the outer part of the shell, a through hole is formed in the surface of the shell, a gear I is fixedly connected to the outer part of the shell, and a connecting rod I is movably connected to the inner part of the shell; a gear II is movably connected outside the connecting rod I; under the interaction of the through hole, the gear I, the connecting rod I, the gear II, a connecting rod II, a connecting rod III, a sliding rail, a sliding block, a contact rod, a mounting plate, a fixed shell, a magnetic ring, an electromagnet, a movable plate, a support plate, a stirring head, a detection assembly I, a detection assembly II and a delay assembly, the biogas fermentation yield can be greatly improved, and the economic income of users is increased; meanwhile, the yield of organic substances repaired by microorganisms is increased, and the phenomenon that the organic substances generated in life pollute the environment is avoided, so that the organic substances are reasonably and scientifically utilized.

The invention provides a comprehensive protection system for a corrosive gas cylinder. The comprehensive protection system comprises a cabinet body, a sealing door, a waste discharge filtering device;the sealing door is covered in the cabinet body in a sealing manner, and the waste discharge filtering device is in communication with a waste gas discharge port of the cabinet body; a working area and a storage area are arranged in the cabinet body, and each of the working area and the storage area is provided with at least one group of fixing positions capable of accommodating steel cylinders;a steel cylinder valve is mounted at a top port of each steel cylinder, a gas outlet of each steel cylinder valve is connected with a pressure reducing valve, and an outlet of the pressure reducing valve is guided to a gas outlet of the cabinet body through a gas pipe; the cabinet body is also connected with a gas leakage alarm instrument which can be used for detecting gas leakage in the cabinetbody; and the waste discharge filtering device comprises a first electromagnetic valve capable of controlling opening and closing of a gas inlet in the cabinet body, a second electromagnetic valve capable of controlling opening and closing of a waste gas discharge port in the cabinet body and a filtering body capable of adsorbing leaked gas in the filtering cabinet body. According to the comprehensive protection system, the corrosive gas cylinder can be safely stored, and the sealing and protecting effects are better.

The invention provides a system and a method for realizing aluminum ash resource utilization by utilizing a plasma technology. The system comprises a pretreatment unit, a preheating feeding system, aplasma rotary kiln, a waste heat utilization unit, a tail gas purification unit, a carrier gas supply control system, an oxygen generation unit, a plasma torch and a purification unit. The method comprises the following steps that: aluminum ash is pretreated and preheated and then enters a plasma rotary kiln to be subjected to oxygen-enriched roasting, metal aluminum, aluminum nitride and aluminumcarbide in the aluminum ash are converted into aluminum oxide, fluoride salt and chlorate to volatilize; a calcined oxide is cooled, so that a low-purity aluminum oxide raw material can be obtained;the low-purity aluminum oxide raw material is purified through the purification unit, so that an aluminum oxide product can be obtained; tail gas of the plasma rotary kiln is subjected to heat exchange through the waste heat utilization unit and used for preheating the aluminum ash, and and therefore, energy consumption is reduced; the tail gas subjected to heat exchange is purified and then mixedwith oxygen to be recycled as carrier gas. According to the system and method, aluminum ash resource utilization is achieved, secondary environmental pollution caused by flue gas emission is avoided,and the economical efficiency and the environmental protection property are better.

Proposed are a low-temperature de-NOx catalyst for treating exhaust gas from a stationary source and a method of manufacturing the same. The low-temperature de-NOx catalyst can promote the reduction reaction of nitrogen oxide even at a low temperature despite supporting vanadium in a small amount, can increase resistance to sulfur poisoning, and can be easily manufactured in a manner that does not deteriorate nitrogen oxide removal efficiency even after long-term operation because it prevents secondary environmental pollution due to the treated gas and has superior abrasion resistance, thereby contributing to commercialization.

The invention relates to a liquid organic fertilizer preparation method, which comprises: mixing 1000 parts by weight of deteriorated seafood, 5-15 parts by weight of urea, 50-120 parts by weight of plant ash, and 500 parts by weight of water, placing the uniformly mixed material into a fermentation tank, and carrying out aerobic fermentation for a certain time to prepare the liquid organic fertilizer, wherein the mixed material is flipped every 5-7 days. According to the present invention, the liquid organic fertilizer is added to water according to a ratio of 5-8%, and the obtained mixture is applied at the root part of crops.