431results about How to "Compliance with emission standards" patented technology

A wet ammonium flue gas cleaning process for desulfurizing and denitrifying and a system thereof are disclosed. The process oxidates NO in the flue gas to be NO2, makes SO2 and NO2 in the flue gas react with ammonium to product ammonium sulfite, ammonium nitrate and ammonium nitrite, then oxidates ammonium sulfite and ammonium nitrite therein to product the byproduct that is ammiaonia sulfate and ammonium nitrate, and lastly gets the clear flue gas after demisting to the desulfurizing and denitrifying flue gas. The system comprises a dust pre-collector, a hydrogen peroxide or ozone sprayer, and a desulfurizing and denitrifying tower, which are connected in turns, wherein ammonia replenishment system and an air feeding device are mounted at the bottom of the desulfurizing and denitrifying tower, sprinkling layer which can cycle sprinkle is mounted at the middle, and a demister is mounted at the upper. The invention has a simple process, a simplified system, a low investment and operation cost. The invention not only has a high efficiency in desulfurizing and denitrifying, but also a high utilance of desulfurizing and denitrifying absorbent, and byproduct of desulfurization and denitration can be utilized as chemical fertilizer of ammiaonia sulfate and ammonium nitrate.

The invention discloses a low temperature Claus sulfur recovery process. The process mainly comprises a thermal reaction section, a catalytic reaction section and a tail gas incineration section, wherein in a combustion furnace of the thermal reaction section, partial hydrogen sulfide reacts with oxygen to be converted into sulfur dioxide, the hydrogen sulfide and the sulfur dioxide undergo a Claus reaction to generate sulfur, and process gas after sulfur separation enters the catalytic reaction section; in the reactor of each stage of the catalytic reaction section, the hydrogen sulfide and the sulfur dioxide under conventional Claus reaction, catalyst reactivation, sub-dewpoint and sub-solid point low temperature Claus reaction in sequence; after the catalyst reaction section, the tail gas which is subjected to sulfur separation enters the tail gas incineration section, and the tail gas is incinerated and exhausted in the tail gas incineration furnace. The process adopts a lower reaction temperature, contributes to performance of chemical equilibrium towards the direction of sulfur generation, so that conversion rate and recovery rate of sulfur are improved. Moreover, the process has the advantages of simple process flow, relative small equipment and investment, low operation cost and more contribution to environmental protection. The invention also discloses a device for the low temperature Claus sulfur recovery process.

The invention relates to a decomposition process for comprehensively recovering a liquid alkali roasting resource of mixed rare earth concentrate, comprising the following steps of: mixing and roasting the mixed rare earth concentrate and sodium hydroxide according to a weight ratio, wherein the roasting temperature is 200-600 DEG C, and the roasting time is 0.5-4 h; watering the roasted mineral water to be neutral; preferentially dissolving an alkali cake by using hydrochloric acid to obtain a less cerium chlorinated rare earth solution; reducing and dissolving residues by using hydrochloric acid after the hydrochloric acid is preferentially dissolved to obtain a rich cerium chlorinated rare earth solution; after extracting and recovering phosphorus of the rich cerium chlorinated rare earth solution, neutralizing the rich cerium chlorinated rare earth solution to obtain thorium enrichment content; recovering fluorine and sodium hydroxide in a roasted mineral water solution; and after extracting and separating the less cerium chlorinated rare earth solution, recovering calcium chloride. The mixed rare earth concentrate is processed by using the method disclosed by the invention. The continuous production of liquid alkali roasting mixed rare earth concentrate is realized. Tetravalent cerium and trivalent rare earth are separated preferably. Rare earth, thorium, fluorine, phosphorus, calcium and the like are comprehensively recovered. Waste gas and radioactive waste residues are avoided. Cleaner production and resource comprehensive recovery are realized.

The invention relates to a water-based airplane surface cleaning agent, which is prepared by uniformly mixing the following components in percentage by weight: 21 to 30 percent of degradable surfactant, 5 to 7 percent of metal corrosion inhibitor, 0.3 to 2 percent of pH regulating agent, 1.7 to 5 percent of stabilizer, and the balance of deionized water. A preparation method comprises the following steps: (1) weighing the pH regulating agent, the degradable surfactant, the metal corrosion inhibitor, the stabilizer and the deionized water according to the ratio of weight percent; (2) adding the pH regulating agent, the metal corrosion inhibitor, the degradable surfactant and the stabilizer into the deionized water at the room temperature of between 23 and 25 DEG C; and (3) stirring the liquid at constant speed of 60 to 80r/min for 20 to 40 minutes to ensure that no bubble is generated in the liquid to prepare the cleaning agent after uniform mixing. The invention has scientific and reasonable formula and simple process without special equipment, and the cleaning agent has the advantages of strong cleaning capability, short cleaning time, low cost, high efficiency and is safe and reliable for use.

The invention relates to a method for treating a low-concentration ammonia-nitrogen wastewater or feed liquid. The method comprises the steps: firstly, pre-treating the low-concentration ammonia-nitrogen wastewater or feed liquid, removing impurities in the wastewater or feed liquid, adjusting the pH of the wastewater or feed liquid to 6-7.5, and increasing the surface tension to 40 mN/m or even 65 mN/m or more; then carrying out selective adsorption treatment on the pretreated low-concentration ammonia-nitrogen wastewater or feed liquid with zeolite, making the ammonia-nitrogen average concentration of the wastewater or feed liquid subjected to adsorption less than a predetermined value, when the ammonia-nitrogen average concentration of the wastewater or feed liquid after the adsorption treatment reaches the predetermined value, carrying out regeneration treatment on zeolite by utilizing a regeneration liquid, and thus obtaining an ammonia-nitrogen enriched regeneration liquid; followed by allowing the ammonia-nitrogen enriched regeneration liquid to enter a gas membrane separation device, and carrying out deamination treatment; and finally carrying out concentration treatment on the ammonia-nitrogen removed regeneration liquid, and thus obtaining a recyclable regeneration liquid. The method has the advantages of simple operation, small energy consumption, low operation cost, no secondary pollution, economy and environmental protection.

The invention relates to a water based environment-friendly cleaning agent and the preparation method, which is characterized in that the agent comprises natural plant extract, degradable surface active agent, inhibiter and de-ionized water. The preparation method is as follows: (1) preparing materials according to the weight ratio, (2) adding the raw material orderly in series, (3) stirring at even pace and (4) evenly mixing to make the finished cleaning agent ultimately. The preparation method for the water based environment-friendly cleaning agent has the advantages of scientific prescription, simple production technique, strong cleaning ability, short cleaning time, low labor and man-hour, high work efficiency, low causticity to the equipment, good safety and low equipment cost. The water based environment-friendly cleaning agent is degradable liquid and can be biologically degraded into harmless material in nature completely. The waste liquid after be cleaned cab be directly discharged without polluting the environment and reach the sewage discharge standard. The water based environment-friendly cleaning agent is provided with the surface active agent and the inhibiter which can form a rustproof protecting film on the metal surface after cleaning, and ensures that the part after cleaning has an advantage of good rust protection.

The invention discloses a wall-hung thin type lampblack depurating machine, which is provided with flat cuboid-shaped shell, wherein a double-volute is arranged in the shell, and two isolated chambers of the double-volute share an air outlet passage on the top of the shell; a turbo-fan with a horizontal output shaft is arranged in the two isolated chambers of the double-volute respectively, and the front end of the output shaft of the turbo-fan extends out of the double-volute and is connected with at least one vertical rotary centrifugal filter screen plate; and the outside of the rotary centrifugal filter screen plate is provided with an annular oil guide ring, the bottom of the annular oil guide ring is provided with an oil leak opening, a fume flow distribution plate is arranged below the annular oil guide ring, an oil guide tank is arranged on the fume flow distribution plate, and the bottom of the shell is provided with an air inlet passage and an oil collection box. The wall-hung thin type lampblack depurating machine has ultra-high efficiency for holding up and collecting lampblack, can basically put an end to the pollution caused by the lampblack to the air, the shell and the external wall of a building, and has the characteristics of overall closure, simple structure, convenient cleaning, energy saving and noise reduction, large cooking space, safe running and long service life.

The invention relates to a liquid alkali roasting decomposition extraction process of mixed rare earth concentrates, which comprises the following steps of: (1) mixing mixed rare earth concentrates and sodium hydroxide (prepared solution) in the weight ratio of 1:0.5 to 1.5; (2) roasting the rare earth ore mixed with the sodium hydroxide at the roasting temperature of between 150 and 500 DEG C for 0.5 to 4 hours; (3) performing size mixing on roasted ore hot water obtained by roasting, adding oxidant simultaneously for oxidation, and performing washing until the mixture is neutral after the oxidation; (4) dissolving trivalent rare earth preferentially in washed alkali cakes in hydrochloric acid, and controlling the pH value to be between 4 and 5 to prepare rare earth chloride solution with less cerium; and (5) performing reductive dissolution of the hydrochloric acid on cerium dregs dissolved preferentially in the hydrochloric acid, and controlling the pH value to be between 4 and 5 to prepare cerium-rich chloride solution. The mixed rare earth concentrates are processed by adopting the extraction process, so that the continuous production of the alkali-decomposing mixed rare earth ore can be realized, cerium-rich products are extracted preferentially, the treatment capacity of the follow-up extraction separation is relieved, and the pollution-free production and comprehensive utilization of resources are realized.

The invention relates to a pipeline cleaning agent which comprises the following components by weight: 15-28 parts of organic acid, 20-35 parts of an asurface active agent, 18-30 parts of a penetrating agent and 0.5-3 parts of an acorrosion inhibitor, wherein the surface active agent comprises one or more ofpolyether, butyl cellosolve, coconut oil fatty acid diethanol amide and fatty alcohol-polyoxyethylene ether sulfate sodium; the penetrating agent comprises one or more of alcohol, sodium dodecyl sulfate, sodium dioctyl sulfosuccinate,dodecyl dimethyl betaine, sodium oleoyl methylamine ethanesulfonate and calcium chloride; the corrosion inhibitor comprises one or more of imidazolinequaternary ammonium salts or imidazoline amides. The pipeline cleaning agent can effectively remove grease and dirt in a pipeline to keep the pipeline unblocked, is safe and non-toxic, cannot corrode equipment, is harmless tohuman skin and conforms to emission standards.

The invention relates to a processing method for cyanogens contained waste salt dredge, the process steps are: the cyanogens contained waste salt dredge is put into the drier to be heated; the heating temperature is controlled with 60-120deg.C, the carbinol and the alcohol volatilize from the dredge, the carbinol and the alcohol are reclaimed with high purity after beings cooled in the condenser; the cyanogens contained waste salt dredge without carbinol and alcohol is baked in oxygen condition, the oxide in the dredge is fully oxidized, the organic is oxidized or volatilized off, thus eliminates the cyanogens and organic in the salt dredge; the gas generated in the baking process is transmitted to the burning furnace, the temperature is not lower than 1100deg.C, thus the tail gas may accord the discharging standard.

The invention discloses a biological response system for multistage sewage treatment as well as a manufacturing method and a sewage treatment method. The biological response system is formed by connecting a multistage precipitation pretreatment unit, a multistage hydrolysis and acidizing treatment unit, an aeration oxygenation treatment unit and a multistage undercurrent wetland treatment unit through pipelines; the multistage undercurrent wetland treatment unit comprises a water inlet wetland pool, two groups of decomposition and percolation wetland pools and a water outlet wetland pool which are sequentially arrayed; and the multistage precipitation pretreatment unit, the multistage hydrolysis and acidizing treatment unit and the aeration oxygenation treatment unit are sequentially arranged on one side of the multistage undercurrent wetland treatment unit in parallel and are connected with one another through pipelines. The biological response system provided by the invention has the advantages of scientific design, reasonable structure, fewer electromechanical devices due to the adoption of an automatic flow mode, low operation cost, low sewage treatment expense, small floor area, obvious sewage treatment effect, convenience for operation and maintenance management, low cost on project capital construction and operation, and capability of carrying out purification treatment all the year round, ; the treated sewage can be directly discharged into reservoirs, rivers and lakes and is in accordance with discharge standards in China; and a bioecological technology has stronger self-regulation capability and repair capability.

The invention relates to a radioactive liquid waste treatment device comprising a feeding device, a volume reducer of radioactive wastes, a tail gas and residual liquid treatment device and a conveyer. The feeding device, the tail gas and residual liquid treatment device and the conveyer are respectively connected with the volume reducer; the feeding device, the tail gas and residual liquid treatment device, the conveyer and the volume reducer are integrally arranged under a vacuum environment; the volume reducer comprises a macroscopic dehydration volume-reduction unit for macroscopically dehydrating and reducing volume of the radioactive liquid wastes and a heating-drying volume-reduction unit, and the heating-drying volume-reduction unit and the macroscopic dehydration volume-reductionunit for breaking the organization structure of the radioactive wastes are connected by a pipeline to form a seal system. A movable radioactive liquid waste treatment device disclosed by the invention has the advantages of little environment pollution, safe and reliable treatment process and reduced storage space, and reaches the state standard of effluent discharge.

The invention relates to an innocent treatment process for livestock and poultry died from diseases. The innocent treatment process comprises the following steps: disinfecting a transport vehicle; breaking livestock and poultry died from diseases, metering and weighing the broken materials, and then carrying out high-temperature and high-pressure sterilization treatment; collecting waste gas generated during the high-temperature and high-pressure sterilization treatment, removing a small amount of materials contained in the waste gas, condensing the waste gas obtained by separation, introducing the condensed waste gas into a biofilter and filtering; performing coarse filtering, namely, performing solid-liquid separation on a mixture of material and oil after high-temperature and high-pressure sterilization treatment, and storing the separated oil into an oil storage tank; performing refined filtering, namely, performing solid-liquid separation on the material obtained by solid-liquid separation again, and storing the separated oil into the oil storage tank; performing oil separation, namely, performing solid-liquid separation on the oil in the oil storage tank, so as to obtain high-purity oil which can be taken as bio-oil for production, wherein the separated tiny material is subjected to refined filtering again; and finally, grinding the material obtained after solid-liquid separation and bagging. According to the innocent treatment process, resource utilization is realized, waste is turned into valuable, energy is saved, and the environment protection purpose is achieved.

The invention relates to a wind speed-reducing water mist removing device which comprises a toggle joint and a purifying cylinder, wherein the toggle joint is connected with an air inlet pipeline, and the purifying cylinder is connected with an air outlet of the toggle joint; the purifying cylinder comprises an outer cylinder body with an air outlet, a middle cylinder body and an inner cylinder body, wherein the outer cylinder body is installed above the air outlet of the toggle joint and the middle cylinder body and the inner cylinder body are installed in the outer cylinder; multiple layers of damping disks are arranged in both an annular passage between the outer cylinder body and the middle cylinder body and an annular passage between the middle cylinder body and the inner cylinder body; multiple layers of damping disks are formed by mutually spacing at least two small damping disks and at least two big damping disks; and a drain pipe is installed at the bottom of the outer cylinder body. The invention is used for the purification processing of industrial waste gases, and the water mist and the waste gases after being mixed are rapidly discharged into the toggle joint by the air inlet pipeline through an induced draft fan; after carrying out centrifugal shunting, the water mist mixed with smoke and poisonous substances is condensed in the purifying cylinder and separated from an airflow, thus purified air is discharged; and the invention has the advantages of low cost and obvious purifying effect.

The invention provides a low-phosphorous environment-friendly scale inhibitor adapting to 'three-high' water quality and preparation thereof. The scale inhibitor is prepared from the following raw materials in part by weight: 1, 1.0 to 2.5 parts of polyamino polyether methylene phosphonic acid (PAPEMP); 2, 1.5 to 3.0 parts of polyepoxysuccinic acid (PESA); 3, 1.5 to 2.5 parts of acrylic acid-hydroxypropyl acrylate-AMPS terpolymer; 4, 1.5 to 2.5 parts of liquid caustic soda; 5, 0.5 to 1.0 part of hydrolyzed plymaleic anhydride; and 6, the balance of water. The scale inhibitor is prepared by the following steps of: pumping the raw materials 1, 2 and 3 into a reaction kettle during synthesis, and continuously stirring; and adding the material 4 into 5 and 6, pumping into the reaction kettle, continuously stirring for 35 to 45 minutes, and discharging to prepare the product. The scale inhibitor has good scale-inhibiting effect on carbonate and phosphate and the scale-inhibiting time of 100 hours, and is suitable for a high-hardness high-alkalinity high-mineralization circulating cooling water system and oil field water treatment. Therefore, the original concentration times is improved from 3 times to 5-6 times, the new water can be saved by 10 to 30 percent per year, and the phosphorus content of sewage treated by the scale inhibitor is 1.5 to 3ppm and accords with the national phosphorus discharge standard.

The invention discloses a waste drilling mud treatment process. The process comprises the following steps: adding a proper amount of a first flocculant into mud so as to primarily destabilize the mud; adding a proper amount of a second flocculant into the primarily destabilized mud for destabilizing continuously so as to complete the mud destabilization; performing solid-liquid separation treatment on the destabilized mud so as to obtain sediments and supernatant; clearing away the sediments and adding a proper amount of a third flocculant into the supernatant so as to remove residual flocculating constituents; adding a proper amount of a first pH regulator into the supernatant, in which the residual flocculating constituents are removed; discharging the supernatant. Compared with the prior art, the waste drilling mud treatment process has the advantages that through the combined flocculation of the first flocculant and the second flocculant, the flocculation effect is better and the water content of the sediments is lower.

The invention discloses a physical sewage treatment system used for sewage treatment from the source, comprising a solid-liquid separation device and a settling device. The solid-liquid separation device is provided with a solid-liquid separator, and a separation water inlet, a separation water outlet and a separation sewage discharging port of the solid-liquid separator; the settling device comprises a settling shell the bottom of which is provided with a settling sewage discharging port, a water inlet hose and a water outlet hose are arranged in the settling shell, the water inlet end of the water inlet hose is connected with the separation water outlet of the solid-liquid separation device, the water outlet end of the water inlet hose is connected with a hollow floating disk, the outline of the floating disk adapts to that of the cross section of the settling shell, and a plurality of through holes are uniformly distributed in the annular area of the bottom surface, close to the edge; a floating disk water outlet is arranged on the bottom of the floating disk and is connected with the water inlet end of the water outlet hose, and the water outlet end of the water outlet hose extends out of the settling shell. The sewage treatment system can be used for treating sewage timely from the pollution sources, thus reducing or avoiding the phenomenon that sewage enters public water body.

The invention relates to a chemical for cleaning a boiler, and belongs to the technical field of the chemical cleaning of equipment. The chemical comprises a corrosion-inhibiting acid-washing agent, a bleaching agent and a passivant, wherein the corrosion-inhibiting acid-washing agent consists of 1,3,5,7-tetraaza-adamantane, ethylenediamine tetracetic acid, hydrochloric acid, phosphoric acid, silicon fluoride, hydrazine hydrate, sodium silicate, cetyl dimethyl benzyl ammonium chloride, ammonium thiocyanate, sodium dodecyl benzene sulfonate and the balance of water; the bleaching agent is citric acid solution; and a passivant consists of ethidene diamine, formaldehyde, diammonium phosphate, hydrogen peroxide, sodium nitrite and the water. The chemical has stable chemical properties, low toxicity, a good sustained-release effect and high scale dissolving capacity, and does not have the damage of sour corrosion to the boiler.

The invention belongs to the technical field of chemical engineering and particularly relates to a water vapor electrolytic process based system for joint production of ammonia and nitric acid. The system comprises a nitrogen generation unit, an ammonia synthesis unit, a nitric acid generation unit, and a solid oxide electrolyzer. The ammonia synthesis unit is used to provide the material ammonia and process vapor for the nitric acid generation unit, no ammonia is externally purchased for the nitric acid generation unit, meanwhile, a heat recovery boiler is eliminated. The reaction heat of the ammonia synthesis unit and the nitric acid generation unit is used to produce high temperature vapor, the high temperature vapor is applied to the solid oxide electrolyzer, the solid oxide electrolyzer produces hydrogen and oxygen, the hydrogen and the oxygen are applied to the ammonia synthesis unit and the nitric acid generation unit, so that a mode of joint production of ammonia and nitric acid by taking air and water as raw materials is achieved, no materials or fuels are externally purchased, only electric energy is used, so that the system has the characteristics of high integration, low production cost, single and convenient energy consumption, reasonable recovery of energy, less environment pollution, conformity to the international emission standard and the like, and has an excellent economic benefit and an excellent application prospect.