43results about How to "Reduce sulfide content" patented technology

The invention provides a desulfurization wastewater cyclone dedusting method, wherein, after the wastewater treated by the gypsum dehydration system is treated by the wastewater cyclone, part of the underflow goes to the desulfurization tower for reuse, and part of the overflow goes to the waste water tank for collection, and the waste water is transported to The rotary atomizer conducts atomization, and the atomized mist descends and contacts with the high-temperature flue gas connected in front of the air preheater. The outlet flue of the evaporation tower enters the front flue of the dust collector, and the waste water enters the desulfurization tower through the dust collector in the form of purified water vapor. The invention has high stability of waste water treatment, is not affected by unit load, has low investment and operation costs, saves water consumption and energy consumption, realizes the simultaneous increase of flue gas humidity in waste water, and improves the dust removal efficiency of the dust collector.

The invention discloses a gas mixing system, comprising: a first-stage gas mixing device and a second-stage gas mixing device cascaded in sequence; the first-stage gas mixing device is used to mix blast furnace gas and converter gas to obtain high-revolution gas ; The second-stage gas mixing device is used to mix high-rev gas with refined coke oven gas to obtain low-sulfur mixed gas; and mix high-rev gas with ordinary coke oven gas to obtain ordinary mixed gas. This application maximizes the use of low-quality blast furnace gas and converter gas through the first-stage gas mixing device, and reduces the amount of coke oven gas used by the second-stage gas mixing device to meet the needs of equipment for high calorific value. At the same time, it can relatively reduce the mixing The sulfide content in the coal gas solves the technical problem in the prior art that the requirements of different equipment and processing techniques on the calorific value and sulfide of the gas cannot be taken into account at the same time.

The invention relates to a metallic fiber and multi-hole ceramic dielectricsurface burner, belonging to heat energy engineering technology area. The burner comprises burner shell, gas pipeline and air pipeline. In the empty cavity constituted by the burner shell, metallic fiber medium in combustion zone and ceramic medium in preheat zone are set from upper to lower in turn and two medium are tightened together. The material of metallic fiber medium in combustion zone is made of Fe-Cr-Al alloy and the material of ceramic medium in preheat zone is made of zirconia or silicon carbide. Compared with ordinary surface burner, the invention can prevent tempering effectively, improve the adjustable range of fuel and air and improve burning temperature in certain range so as to improve thermal efficiency. The burner in invention can burn natural gas, liquefied petroleum gas and mixed gas so on, also burn air fuel with low thermal value which is approached to 1000kcal / m3.

The invention discloses a process for recovering all components of desulfurization waste liquid. The process is to pretreat the desulfurization waste liquid. The pretreatment process includes preheating or evaporation concentration; then the pretreatment liquid is passed into an oxidation conversion reactor, Carry out catalytic conversion treatment, add concentrated sulfuric acid with a mass percentage of 92%-98% during the conversion process, the conversion temperature is 110-130°C, and the conversion pressure is 0.1-0.5 MPa; the converted acid gas is washed with desulfurization liquid, and the converted The desulfurization solution is decolorized to obtain a sulfuric acid solution containing ammonium bisulfate. The invention converts all auxiliary salts in desulfurization waste liquid, has simple process flow, low investment and operation costs, solves the problems of difficult desulfurization waste liquid treatment and slow sales of desulfurization waste liquid auxiliary salts, and realizes full component recovery of desulfurization waste liquid and use.

The invention relates to a method for desulphurizing gasoline. In the method, a beta molecular sieve serves as a carrier; a selective adsorbent is adopted to adsorb thiophene sulfides in the gasoline and remove the thiophene sulfides from the gasoline; a hydrogen type beta molecular sieve serves as the carrier of the adsorbent; the molecular sieve carries copper, silver, zinc, nickel or gallium metal ions and metal cerium ions; and the exchange amount of the metal ions is 0.001 to 15 percent based on the mass of the hydrogen type beta molecular sieve. The adsorbent is used to selectively adsorb the thiophene sulfides in the gasoline and deeply remove the thiophene sulfides from the gasoline. A result shows that: the bimetallic ions have a synergistic effect, improve the selectivity of adsorptive desulphurization and can reduce the content of the sulfides in the fluid catalytically cracked (FCC) gasoline to below 1mu g / g or zero from 200mu g / g. The reaction condition is mild; the equipment is simple; the activity of the adsorbent is high; and the adsorbent is easy to regenerate. At normal temperature and normal pressure, hydrogen is not consumed and the gasoline is finely desulphurized.

The invention discloses a smokeless vehicle diesel oil, which comprises the following components in parts by weight: 180 to 220 parts of aviation kerosene, 90 to 110 parts of plant oil, 245 to 265 parts of finely-processed drainage oil, 290 to 310 parts of self-made smokeless oil, 45 to 55 parts of anti-freezing and pour point reducing agent, 8 to 12 parts of upgrading agent, and 30 to 40 parts of flame retardant. The finely-processed drainage oil is prepared by the following steps: heating drainage oil, removing impurities from drainage oil, carrying out primary filtration by a filter screen, and carrying out secondary filtration through pressurization. The smokeless vehicle diesel oil is prepared by the following steps: mixing smoke oil and edible vinegar according to a weight ratio of 1000:10-15, stirring for 40 to 50 minutes at a temperature of 11 to 12 DEG C in a rotation speed of 60 to 120 r / min, allowing the system to stand still, when the precipitate has a dark-red color and the supernatant oil has a white-green color so as to obtain the self-made smokeless oil (supernatant oil); mixing kerosene, plant oil, and finely-processed drainage oil, stirring until specific gravity reaches 0.85, transferring the mixture to another container, adding self-make smokeless oil, an anti-freezing and pour point reducing agent, an upgrading agent, and a flame retardant, stirring until the specific gravity of the mixture reaches 0.85, stopping stirring, and completely transferring the mixture to an oil storage tank so as to obtain the smokeless vehicle diesel oil. The raw material costs of the smokeless vehicle diesel oil are reduced, moreover, the diesel oil is smokeless and environment-friendly, and the quality of the diesel oil meets the standards of DB11 / 239-2010.