36results about How to "Simplify the desulfurization process" patented technology

The invention discloses a high sulfur bauxite pre-desulphurization method. The method is characterized in that a solution obtained after the pre-desulphurization of high sulfur bauxite by using a sodium hydroxide solution with a low concentration in the presence of oxygen is recycled, and the concentrated solution is used to dissolve out aluminum in bauxite. The method is simple and effective. The sulfur content decreases to below 0.7% after the desulphurization pretreatment of the high sulfur bauxite, and the pre-desulphurized bauxite can be used in a barer process. The method has the advantages of low operation temperature, good desulphurization effect, low energy consumption and the like.

A desulfurizer compounded by industrial wastes and a production method thereof separately relate to a desulfurizer and a production method thereof. The desulfurizer uses carbide slag, iron-making slag and coal ash slag as basic materials and is an efficient compound desulfurizer used in the dry desulphurization of the circulating fluidized bed boiler, wherein the mixing percentages of carbide slag, coal ash slag and steel slag powder are 30-40%, 50-60% and 10-5% respectively. The production method comprises the following steps: crushing and grinding carbide slag and steel slag to powder of being less than 100 microns, screening coal ash slag to obtain particles of 1-2 mm, performing hydration treatment according to the percentages, placing in a stirrer to fully stir, drying, and screening to obtain the product, wherein the particle size of the qualified product is 1-2mm through inspection. When the ratio of Ca / S is 2.5, the desulphurizing rate of the desulfurizer of the invention is more than 80%; the processing equipment is simple, the investment cost and operating cost are low; and the existing consumption technology and equipment are not changed and the boiler efficiency and the electricity consumption of the fan are not obviously affected. The desulfurizer of the invention can be popularized in the desulfurization of the circulating fluidized bed boiler.

The invention relates to a method for preparing regenerated rubber at low temperature at one time, belonging to the technical field of rubber regeneration. In this method, vulcanized rubber powder, auxiliaries and plasticizers are added to a high-shear internal mixer, and the regenerated rubber sheets are discharged after internal mixing. The mixing temperature is maintained at 60-90°C. The outer end of the feed inlet of the internal mixer is connected with a double auger feeding mechanism to improve the uniformity and efficiency of material transportation. The rotors in the internal mixing chamber are set horizontally and are four in a rectangular distribution. The shearing, squeezing and rubbing intensity of the material increases exponentially. Combined with the wavy shape of the working end surface of the top bolt and press head, the physical properties of the material improve quickly, ensuring that the low-temperature kneading process does not affect or even improve the entire internal kneading process. The working efficiency of the machine, the low-temperature preparation method of recycled rubber involved in the present invention can not only retain the advantage of not affecting the external environment during low-temperature preparation, but also greatly improve the efficiency of low-temperature mixing and the quality of the recycled rubber.

The invention discloses a natural gas desulphurization device in an integrated type oil-gas field. An absorption oxidation reactor is vertical cylinder-shaped; an inner cylindrical barrel of which the upper seal is sealed and the lower part is opened is arranged at a central part from an upper seal to a lower bottom; an annular barren liquor chamber is arranged at the inner periphery from the middle part to the lower part; a natural gas inlet pipeline is arranged from the periphery of the lower part of the upper seal to the middle part of the inner barrel; a barren liquor circulation pipeline is arranged from the bottom part of the barren liquor chamber to the middle and upper part of the inner barrel; an air oxidation circulation pipeline is arranged from the lower part of the barren liquor chamber to the natural gas intake pipeline; an oxygen supplement pipeline is arranged at an inlet of the air oxidation circulation pipeline; a natural gas output control pipeline is arranged at the center of the upper seal of the absorption oxidation reactor; a sulfur collecting and preparing pipeline is arranged at the center of a lower end seal of the absorption oxidation reactor; a heating pipeline is arranged at the lower part inside the absorption oxidation reactor; and a dosing control pipeline under the control of liquid level difference of a liquidometer arranged at the middle and lower part of the absorption oxidation reactor and a liquidometer arranged at the middle and lower part of the inner barrel is arranged at the periphery of the middle and lower part of the absorption oxidation reactor.

The invention relates to the technical field of aluminum oxide, and in particular relates to a method for producing aluminum oxide through sintering sulfur-containing monohydrallite and lime. According to the method, through properly adding a small amount of flue gas desulfurization slag and the lime into sulfur-containing monohydrallite for sintering, the aluminum oxide is produced, enabling aluminum element and sulphur element in a raw material to form a 4Cao.3Al2O3.SO3 phase, and by enabling silicon element to form a gamma-2CaO.SiO2 phase, and then adopting a low-temperature dissolution technology to perform aluminum oxide production, the deleterious effect of the sulphur element is reduced, the aluminum oxide dissolution performance of clinker is improved, and better market application value and social benefit are realized.

The invention discloses a compound desulfurization adsorbent and a preparation method thereof. The compound desulfurization adsorbent is prepared from 100 parts by weight of modified mesoporous molecular sieve, 50 to 80 parts by weight of modified microporous molecular sieve, 20 to 30 parts by weight of aluminum oxide and 15 to 30 parts by weight of nitric acid solution. The preparation method comprises the following steps: uniformly mixing the modified mesoporous molecular sieve, the modified microporous molecular sieve, the aluminum oxide and the nitric acid solution, carrying out extrusionforming to obtain particles and curing at the room temperature; drying the cured particles and carrying out high-temperature activated roasting to obtain the compound desulfurization adsorbent. The application also provides application of the compound desulfurization adsorbent in removing sulfide in sulfur-containing substances. The compound desulfurization adsorbent disclosed by the application can effectively remove various sulfides in the sulfur-containing substances and simplifies the desulfurization process; in addition, the preparation method has the advantages of simple preparation process, easiness in raw material obtaining and lower cost.