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

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.

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 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 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 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.