31results about How to "Realize continuous regeneration" patented technology

The invention relates to a process for producing light aromatics and clean fuel oil by hydrocracking catalytic cracking diesel oil through moving bed. The process comprises the following steps: 1) mixing catalytic cracking diesel oil and hydrogen into a fixed bed hydrotreating reactor Hydrofining reaction to remove sulfur and nitrogen impurities, and carry out hydrogenation saturation of olefins and hydrogenation saturation of partial aromatic rings of condensed aromatic hydrocarbons; After mixing, enter the moving bed hydrocracking reactor for deep hydrocracking reaction, and realize the separation of hydrocracking products and deactivated catalyst at the outlet of the reactor; 3) The deactivated catalyst recovers the hydrocracking activity through online charring and sulfidation 4) Hydrocracking products are separated and fractionated to obtain liquefied gas, light aromatics, high-octane clean gasoline blending components and clean diesel blending components.

The invention relates to a catalyst for purifying tail gas of diesel automobiles, a preparation method and a purification device thereof. The catalyst comprises a first carrier taking cordierite honeycomb ceramics as a matrix, and a second carrier taking SiC or a cordierite wall-flow structure as a matrix, a first coating and active components on the first carrier, as well as a second coating and active components on the second carrier. In the invention, coating, roasting and reduction processes are adopted for preparing the coatings composed of composite oxides. The catalyst and the device in the invention employ a technology combining a DOC (diesel oxidation converter) and a CDPF (catalyzed diesel particulate filter). By means of the DOC at a front end, HC, CO as well as the soluble organic fractions (SOF) in PM are removed through oxidation. Meanwhile, NO is converted to NO2 that has stronger reducibility so as to be good for the reaction of NO2 and C, thus reaching the purposes of removing NO and lowering the combustion temperature of C simultaneously. Depending on the self-temperatures of diesel automobiles to realize regeneration of a particulate filter, the purification device in the invention has the characteristics of high purification efficiency and convenient usage, etc.

The invention relates to a dust removal system and method for raw coke oven gas by virtue of a rotary type fixed bed. The dust removal system comprises a dust remover, a filter material regeneration furnace, a high-temperature bucket elevator and a high-temperature vibrating screen, wherein the filter material outlet of the dust remover is communicated with the feeding hole of the filter material regeneration furnace; the discharge hole of the filter material regeneration furnace is communicated with the feeding hole of the high-temperature bucket elevator; the discharge hole of the high-temperature bucket elevator is communicated with the high-temperature vibrating screen; and the high-temperature vibrating screen is respectively communicated with the filter material inlet of the dust remover through a pipeline. According to the dust removal system and method, updating of the filter material is achieved by using the displacement fixing and circumference rotating mechanisms of a turntable; regeneration and sieving of the filter material are achieved through the filter material regeneration furnace, the high-temperature bucket elevator and the high-temperature vibrating screen; and continuous regeneration of the filter material is achieved, thus the problem that the fixed bed filter material is difficult to regenerate due to carbon deposition is effectively solved; the dust removal efficiency is greatly improved; heat loss is reduced; the dust removal method disclosed by the invention is simple in process, stable in operation, low in cost, and suitable for industrial production; continuous regeneration of the filter material can be achieved; and the dust removal efficiency is greatly improved.

A spray type air source absorption heat pump belongs to the technical field of heat supply. The spray type air source absorption heat pump includes a generator, an absorber, a condenser, a brine regeneration device, a spray tower, a solution heat exchanger, a solution pump and a throttle valve; the present invention adopts the existing centralized heating system Or directly burn fuel to drive an absorption heat pump, and extract low-grade heat energy from the air through a spray evaporator, which improves the primary energy efficiency of heating and reduces pollutant emissions. Compared with traditional air source heat pumps, there is no risk of frost in winter, which ensures the reliability of heating and reduces the area of ​​air-cooled heat exchangers. Using self-exhaust smoke or absorption heat pump refrigeration method can not only realize continuous regeneration of brine, reduce the amount of brine, but also greatly reduce the energy consumption of brine regeneration. The invention has obvious energy-saving and emission-reducing effects for heating supply and preparation of domestic hot water.

The invention provides a method and device for reducing diesel particulate emissions. The method is: the gas with diesel particulate is led into the cylinder filter entocoele which is made up with many filtering elements. Then through the entocole the particulates are filtered and discharged through the leading pipe of offgas. At least one filtering element is always located in the regeneration cavity and others are in work condition. Under the effect of microwave energy, the offgas particulate is eliminated on the filtering pieces, which makes the filtering pieces reborn. The cylinder filter is rotated properly and makes the every filtering piece reborn.

The invention discloses a diesel engine exhaust purification treatment device and method, comprising a catalytic conversion section housing, a catalytic oxidant carrier, a purification and muffler section housing, a particle filter core, a resonance cavity, a perforated intake pipe, an exhaust collection pipe, and an ECU The control system, inlet and outlet pressure sensors, and fuel injectors can integrate the catalytic conversion of exhaust gas, particle capture and noise reduction functions into one, and the radial flow filter element is used to achieve particle capture, which is beneficial to reduce filter resistance; Under normal working conditions of the diesel engine, through the structural combination of catalytic oxidation and particulate capture, particulate capture and regeneration are carried out simultaneously to achieve continuous regeneration; under long-term low-load operating conditions, the fuel injection auxiliary system is activated to still ensure particulate capture and regeneration. Normal operation of regeneration function. The design of perforated intake pipe, resonant cavity, and porous ceramic noise reduction function can effectively eliminate low and intermediate frequency noise. The device has the advantages of compact structure, high particulate capture efficiency, safe and reliable regeneration process, etc.

The invention discloses a regeneration method of waste sulfuric acid from alkylation. The regeneration method comprises the following contents: the waste sulfuric acid generated in alkylation reactionis firstly subjected to heat exchange by a heat exchanger, mixed with partially recycled regenerated sulfuric acid at the bottom of a regeneration reactor, and a mixed liquid material enters the regeneration reactor from the top, flows through a first filler layer filled with a heat carrier, is uniformly dispersed in the first filler layer and absorbs mass transfer; then the material flows through a second filler layer filled with the heat carrier, organic matter in the liquid phase material is coked and carbonized on the surface of the high-temperature heat carrier and adhered to the surfaceof the heat carrier, regenerated sulfuric acid with the organic matter removed is discharged through the bottom of the regeneration reactor, part of the regenerated sulfuric acid is recycled back tothe regeneration reactor, part of the regenerated sulfuric acid is cooled and filtered and mixed with oleum, and the mixture returns to an alkylation production unit for continuous use. Aiming at defects in the prior art, the invention provides the regeneration method of waste sulfuric acid from alkylation. The method has the advantages of low operating temperature, mild reaction conditions, safereaction process, low energy consumption and the like.

The invention discloses a method for treating fluorine-containing reuse water. The method comprises the following specific steps: (1) pretreatment; (2) flocculation precipitation; (3) filtration-reverse osmosis membrane filtration; (4) total organic carbon (TOC) degradation and ultraviolet sterilization; (5) electrodeionization (EDI) treatment; (6) TOC degradation and ultraviolet sterilization; and (7) precise filtration. The invention has the advantages that water quality of an effluent can reach a standard of ultra-pure water, fluorine removal efficiency is high, the recycling rate of wastewater is high, and operation cost is low.

The invention relates to a method for producing propylene from methanol or dimethyl ether, and mainly solves the problems that a catalyst is easily inactivated due to short reaction residence time and the reaction conditions are frequently fluctuated and the operation is unstable caused by frequent switch and reproduction in the prior art. The method for producing the propylene from the methanol or the dimethyl ether comprises the following steps of: a) making oxygen-containing compounds and a diluent enter a fluid bed reactor from the bottom; b) performing contact reaction on the raw materials and a ZSM-5 molecular sieve catalyst at the temperature of between 400 and 550 DEG C under the pressure of between 0.02 and 0.5 MPa; c) separating gas-phase material flow out of the top of the fluid bed reactor to obtain the propylene; d) extracting the reaction heat by using a heat exchanger; e) controlling the inactivated catalyst with a sliding valve and feeding the catalyst into a regenerator through a catalyst spending inclined tube, reacting the inactivated catalyst with air at the temperature of between 480 and 700 DEG C to burn off carbon deposit, and exhausting waste gas; and f) controlling the regenerated catalyst by using the sliding valve and feeding the regenerated catalyst to the upper part of the fluid bed reactor for circulation through a catalyst regenerating inclined tube. The technical scheme of the invention better solves the problems, and can be applied to the industrial production of the propylene.

The invention discloses a reaction technology for converting an oxygen-containing compound into aromatic hydrocarbons by using a moving bed process. The technology comprises the following steps: preheating the oxygen-containing compound and a diluent, carrying out mixing preheating, reacting in the presence of an aromatization catalyst in an aromatization reactor in order to generate a mixed effluent, sending the mixed effluent to a cooling separation unit, carrying out dehydration and oxide removal, separating to obtain main products comprising benzene, toluene, xylene and other byproducts; circulating the other byproducts, benzene and toluene to the aromatization reactor as return hydrocarbons for a reaction; removing carbon-deposited aromatization catalyst particles from the aromatization reactor when the conversion rate of the oxygen-containing compound under the catalyst in the aromatization reactor is lower than 99%, regenerating in a regenerator, and adding the regenerated catalyst to the aromatization reactor. The technology improves the stability and the activity of the catalyst, and improves the selectivity of the aromatic hydrocarbons especially xylene through recycling product hydrocarbons.

The invention provides a method for preparing a visible light micro-nano reactor membrane for the selective removal of ammonia nitrogen. The amide is used as the main raw material, and the obtained mixed material solution is coated on a flat plate, and after the dimethylacetamide is transferred in water, it is taken out and dried to obtain a visible light micro-nano reactor film. The visible light micro-nano reaction membrane of the present invention can effectively realize the selective exchange of ammonium ions from the water body through the ammonium ion sieve material, cooperate with the chloride ion adsorbent visible light catalyst to realize the continuous regeneration of the ammonium ion sieve, and effectively realize the continuous operation of the membrane and stable water output , to solve the technical problems of low selectivity of conventional ion exchangers, difficult treatment of regeneration solution, high regeneration costs, and difficulty in realizing real-time regeneration in situ.

The invention relates to a method for upgrading naphtha and light hydrocarbons, comprising: introducing naphtha into a fixed-bed reaction zone to contact with a dehydrogenation catalyst and performing a dehydrogenation reaction under dehydrogenation reaction conditions, so that part of the naphtha Naphthenic hydrocarbons are converted into aromatic hydrocarbons; wherein, the dehydrogenation catalyst includes a carrier and chlorine elements and Group VIII metals loaded on the carrier; the reaction product obtained in the fixed bed reaction zone is mixed with light hydrocarbons and then introduced into the moving bed reaction zone and the modified catalyst Contact and carry out upgrading reaction to obtain the reaction product and the unused catalyst; the reaction product obtained in the moving bed reaction zone is cooled and separated to obtain the gas phase product and the liquid phase product, and at least part of the gas phase product is returned to the fixed bed reaction zone; the unused catalyst is It is introduced into a regenerator for coke regeneration, and the resulting regenerated catalyst is returned to the moving bed reaction zone. The liquid product yield and octane number of the upgrading method of the present invention are high.

The invention discloses an oxidative desulfurization process in which the desulfurizer can be continuously regenerated, which is characterized in that it comprises the following content: in a fixed bed reactor, hydrogen sulfide-containing gas, oxygen-containing gas and the desulfurizer are in contact with the desulfurizer bed to perform oxidative desulfurization And the desulfurization agent regeneration reaction, the purified gas is discharged from the top of the reactor, and the catalytic cracking diesel oil is introduced during the reaction process to dissolve the elemental sulfur generated by the regeneration reaction, and the catalytic cracking diesel oil dissolved in the elemental sulfur flows out of the reactor, and after solid-liquid separation recycle. The process has high desulfurization precision, long service life of desulfurizer, simple operation and low cost.

The invention relates to a method for upgrading naphtha, comprising: introducing naphtha into a fixed bed reaction zone, contacting with a dehydrogenation catalyst, and performing a dehydrogenation reaction under dehydrogenation reaction conditions, so as to convert part of the naphthenes in the naphtha It is an aromatic hydrocarbon; wherein, the dehydrogenation catalyst includes a carrier and chlorine elements and Group VIII metals loaded on the carrier; the reaction product obtained in the fixed bed reaction zone is introduced into the moving bed reaction zone to contact with the reforming catalyst and carry out the reforming reaction to obtain Reaction products and unused catalysts, the reaction products are cooled and separated to obtain gas phase products and liquid phase products, and at least part of the gas phase products are returned to the fixed bed reaction zone; in the bed reaction zone. The liquid product yield and octane number of the upgrading method of the present invention are high.

The invention discloses a method for increasing the yield of propylene and aromatic hydrocarbon by adopting a moving bed technology. The method for increasing the yield of propylene and aromatic hydrocarbon by adopting the moving bed technology comprises the following steps: (1) introducing raw materials for a first reaction zone and a diluent into the first reaction zone to be contacted and reacted with an A-type molecular sieve based catalyst, wherein a first reaction zone material flow comprises hydrogen, C1-C5 hydrocarbon, an aromatic hydrocarbon component and a C5 or above non-aromatic hydrocarbon component; (2) treating the first reaction zone material flow, then introducing the treated first reaction zone material flow into a separation zone 1 to be separated, mixing one part of return material of the separation zone 1 with the first reaction zone raw materials in ratio, and introducing feedstock for a separation zone 2 into a separation zone 2 to be separated; and (3) introducing raw materials for a second reaction zone, a diluent and the rest return material, obtained in the step (2), of the separation zone 1 into the second reaction zone to be contacted with a molecular sieve based catalyst B, carrying out aromatization reaction for producing a second reaction zone material flow, and mixing the second reaction zone material flow with the first reaction zone material flow. The method for increasing the yield of propylene and aromatic hydrocarbon by adopting the moving bed technology has the advantages that on one hand, the catalyst stability is improved, and on the other hand, flexible yield increase of propylene and aromatic hydrocarbon is realized through multi-reaction zone regulation and circular hydrocarbon selective reprocessing.