31results about How to "Avoid fugitive emissions" patented technology

The invention discloses a treatment method for tail gas of a silane purifying process. The treatment method comprises the following steps of: 11), passing the tail gas of the silane purifying process through a process pipeline, and conveying the tail gas to a first absorbing device, wherein an alkali absorption liquid with concentration of 20%-45% is filled in the first absorbing device; 12), sufficiently absorbing the tail gas of the silane purifying process by the alkali absorption liquid through the stirring of a stirrer in the first absorbing device; and 13), discharging the resultants obtained by the reaction of the tail gas of the silane purifying process and the alkali absorption liquid. According to the treatment method for the tail gas of the silane purifying process disclosed by the invention, the silane in the process tail gas generated in the silane purifying process is absorbed by the alkali solution, so that the tail gas of the silane purifying process is treated in a safe pollution-free manner; and the safety and environment friendliness of a silane rectification process are improved.

The invention discloses a coking tail gas treating method and device. The method includes the following steps that storage tanks storing coking tail gas are closed or sealed through nitrogen filling;the coking tail gas of the storage tanks is charged into a buffering tank for carrying out gas-liquid separation on the coking tail gas, and is cooled and subjected to primary dewatering, naphthaleneremoving and tar removing in the buffering tank; the coking tail gas is sucked into a venture mixer for removing impurities of the coking tail gas from the buffering tank, and a hydrogenation source is introduced into the venture mixer; gas after being mixed in the venture mixer is discharged into a deoxidizing tank and subjected to catalytic hydrogenation deoxidizing; qualified coking tail gas after detection is discharged into a main gas pipe of a coking-plant gas purification system, or is discharged into a later tail gas treatment system. According to the coking tail gas treating method, the collected high-oxygen-content coking tail gas is subjected to hydrogenation deoxidizing, the oxygen content in the coking tail gas is reduced accordingly, the oxygen content in the coking tail gascan be reduced to 0.5% or below, and the coking tail gas can be directly fed into the coking-plant gas purification system and is further purified.

The invention provides a sealing and ventilation dust removal device and method of a coke oven. The sealing and ventilation dust removal device comprises a closed workshop formed by hanging walls, parallel string-net racks, pressure bars, corner braces, a roof, purlines, drawing bars, workshop columns, inter-column braces and the like; dust removal equipment such as an electric valve, a pneumaticvalve, a coke-side smoke exhaust cover, a rising pipe smoke exhaust cover, a furnace top smoke exhaust cover, a compensator, a draught fan, a pulse bag-type dust collector, a chimney and the like; andventilation equipment such as a fresh air pipeline, a primary effect filter, a surface cooler, a refrigerator unit, an air supplier and the like. The method comprises the following steps: 1, sealing;2, ventilating; 3, collecting dust; 4, accident diffusing; 5, smoke conveying pipeline; and 6, treating and discharging the smoke. The sealing and ventilation dust removal device and method have theadvantages that all coke oven smoke released from the top of a coal loader, a rising pipe and a coke extinguishing tank can be collected in a closed space; and by virtue of the ventilation system andaccident treatment system, the labor environment of the operation workers can be improved, the adverse influence of the environment pollution for the operation workers can be reduced, the coke oven smoke can be discharged by reaching standard after the dust removal treatment, and the discharging concentration is less than or equal to 10 mg / Nm3.

The invention provides an oil refining alkali dreg waste liquid processing method including the following steps: (1) sulfuric acid is used for acidification of alkali dreg waste liquid, and nitrogen is introduced; before pH is decreased to 11-9.5, acidified tail gas produced by acidification is discharged into a condensing device, gas discharged by the condensing device is returned to an acidification device to be used as a carrier gas; acidification is continued to be performed until the pH value is dropped to 7-8, acidified tail gas produced by the acidification section is discharged into a sulfur recovery plant for the production of sulfur; acidified tail gas produced after the acidification section is totally returned to the acidification device to be used as the carrier gas; (2) when the alkali dreg waste liquid pH value is dropped to 2-7, acidification is stopped, and oil phase is separated; (3) the waste water with the oil phase recovered is extracted; (4) after extraction, acidic liquid is processed with sodium hydroxide, the sodium hydroxide is added according to the final concentration of alkali of 20wt%-50wt%, and precipitate is isolated to obtain an alkali liquor capable of being reused. The oil refining alkali dreg waste water processing method can effectively recover sulfur resources, sodium resources and phenols in alkali dreg waste water, reduces COD of the waste liquid without production of high salt content and high COD waste liquid, and avoids impact to the sewage treatment field; meanwhile recovered lye can be reused for oil product alkali washing refining and extractant regeneration, and the zero discharge of the alkali dreg waste water can be realized.

The invention relates to an organic sewage constructed wetland processing and high-yield non-food energy plant cultivating technology, which is characterized in that the organic sewage is sent into a methane tank, an oxidation pond and a constructed wetland orderly to achieve the purpose of sewage purification, and simultaneously, the non-food energy plant is cultivated. The invention has the advantages that a buried type ABR system can be ensured to be in an intermediate-temperature fermentation state, the organic matter is digested quickly, and methane is produced with high yield; the methane is used for intensifying light, heating, increasing carbon dioxide fertilizer and enhancing photosynthesis for the system to produce the non-food energy plant with high yield; under the previous condition, plant seeds and energy plants on the oxidation pond (the stabilization pond) and the constructed wetland can grow quickly so as to obtain high yield and produce high-quality protein feed, andthe normal growth and absorption of eutrophic substances in the sewage in winter can be ensured; simultaneously, purified reclaimed water is fully utilized; and the plants inside and outside the system grow quickly, a large amount of carbon dioxide is absorbed and utilized, and zero emission of sewage and methane is realized.

The invention provides an oil refining alkali dreg waste water acidizing processing method including the following steps: (1) acidification processing of oil refining alkali dreg waste water is performed, and nitrogen is introduced; (2) before pH is decreased to 11-9.5, acidified tail gas produced by acidification is discharged into a condensing device, gas discharged by the condensing device is returned to the step (1) to be used as a carrier gas; (3) along with the acidification, the pH value is continued to decrease, and when the pH value is dropped to 7-8, acidified tail gas produced by the acidification section is discharged into a sulfur recovery plant for the production of sulfur; (4) after the acidification is continued to perform until the pH value is dropped to lower than 7, the acidified tail gas is totally returned to the step (1) to be used as the carrier gas; and (5) when the alkali dreg waste water pH value is dropped to 2-7, the acidification is stopped, and oil phase is separated. The oil refining alkali dreg waste water processing method can effectively remove sulfides in alkali dreg waste water, organic sulfide and hydrogen sulfide in the acidified tail gas can be respectively recovered, and recycled, and efficient economic acidification process can be realized.

The invention relates to a surface modification method of a metal-organic framework adsorbing materials. Metal-organic framework porous adsorbing materials (MOFs) are subjected to chemical treatment in a plurality of steps, so that the adsorptive property on non-polar organic gas molecules in presence of water molecules can be improved. The preparation method of the materials comprises the following steps: firstly, putting to-be-modified MOFs into a tube furnace, and introducing nitrogen to ensure no residual air inside; introducing a certain amount of pure pyridine (C5H5N) into the tube furnace together with the N2, and reacting at certain temperature; cooling a reaction tube containing the MOFs to below 50 DEG C, and introducing N2 to the tube furnace; and after desorption is ended taking out and encapsulating the modified MOFs for later use. The metal-organic framework porous adsorbing materials are simple in modification process and high in operability; and the problems of adsorptive property degradation and internal structure damage of the non-polar organic gas molecules caused by hydrophilia of metallic clusters in MOFs porous materials can be solved by the MOFs prepared by the method.

The invention relates to the technical field of thermal engineering, and discloses a yellow phosphorus furnace slag water quenching waste heat recovery device, comprising an electric furnace, a slag discharge port, a chute located below the slag discharge port, a water quenching pool connected to the bottom of the chute, and a slag discharge port A yellow phosphorus combustion device is installed at the junction with the chute, and a spray heat exchanger connected to the water quenching pool through a return pipe and a return pump. The spray heat exchanger is provided with a device for introducing the gas in the combustion device into the spray Induced fan in the heat exchanger. The invention has the following advantages and effects: first, the slag is sprayed and cooled by cold water, and after a large amount of steam is collected by the gas collecting hood, the waste heat is recovered in the steam heat exchanger, and the waste heat recovery efficiency is high; the spray heat exchanger can quench water The heat of hot water in the pool is recovered, and the spray heat exchanger can also exchange heat for P 2 o 5 Absorbed to achieve the effect of saving energy and reducing consumption while controlling pollution.