41results about How to "Long penetration time" patented technology

The invention provides efficient enrichment and separation equipment for ultralow-concentration gas. The efficient enrichment and separation equipment comprises an air compressor, a mass flow meter, a solenoid valve, an infrared ray gas analyzer, a vacuum pump and an online collection system. The equipment has the advantages that a double-tower adsorption and desorption system is arranged; one tower is used for adsorption while the other tower is used for desorption; room-temperature and normal-pressure absorption, vacuum desorption and reaction conditions are easy to realize and the possibility of industrial large-scale production exists; the ultralow-concentration gas which is lower than 0.5% can be separated and purified and the problem that mine gas which is lower than 0.1% can not be used. The adsorption tower is internally provided with three adsorption pipelines which are connected in series so as to prolong the gas penetration time and improve the adsorption efficiency of an adsorbent; the adsorption tower is internally provided with a buffering region and is connected with a desorption tower through a pipeline so as to reduce the energy consumption of the vacuum pump in the switching work process, and improve the economic efficiency; a multi-grade concentration lifting device can meet different working conditions and can recycle low-concentration methane in product gas so as to further reduce the discharging of the methane.

The invention discloses a regeneration method for an adsorbent, belonging to the technical field of flue gas purification. The regeneration method comprises the following steps: conveying an adsorbenthaving adsorbed sulfide into a regeneration reactor for contact with reducing gas, and reducing at least a part of the sulfide so as to obtain the adsorbent with reduced sulfide content and regeneration tail gas, wherein the adsorbent having adsorbed sulfide and the reducing gas are conveyed, in the form of parallel flow, into a reduction reaction section of the regeneration reactor for a reduction reaction, and the adsorbent and the reducing gas in the reduction reaction section have respectively reached temperatures required for the reduction reaction, or the adsorbent and the reducing gasin the reduction reaction section are respectively heated to temperatures required for the reduction reaction. The invention also discloses a flue gas purifying method. As the method is applied to regeneration of the adsorbent having adsorbed sulfide, the production amount of elemental sulfur during regeneration can be effectively inhibited, and the regenerated adsorbent presents prolonged penetration time.

The invention provides a composite molecular sieve, a desulfurization adsorbent as well as a preparation method and application thereof. The preparation method of the composite molecular sieve comprises the following steps: adding a template agent for preparing a mesoporous molecular sieve into an alkaline solution, and stirring to obtain a clear solution; adding a metal zinc in-situ modified silicon-aluminum molecular sieve into the clear solution, and stirring to obtain a turbid liquid; adding a silicon source into the turbid liquid for stirring reaction, and filtering, drying and roasting after reaction to obtain the composite molecular sieve. The desulfurization adsorbent is prepared from the following raw materials in parts by weight: 30-70 parts of a composite molecular sieve, 1-10 parts of an IA group and / or IIA group metal oxygen-containing compound precursor and 30-60 parts of a binder. The desulfurization adsorbent disclosed by the invention is high in adsorption capacity, good in selectivity, high in desulfurization precision, capable of being recycled and long in service life; and C5 oil desulfurized by the desulfurization adsorbent can be directly used as a raw material for high-value utilization.

The invention discloses a modification method of an activated carbon fiber filter screen for removing high-concentration formaldehyde in air, and a product and application of the activated carbon fiber filter screen. The method comprises the steps of activated carbon fiber filter screen pretreatment, pretreatment ozone surface strong oxidation treatment, drying treatment, ammonium persulfate modification treatment and drying treatment, wherein the obtained activated carbon fiber filter screen is laid flat and dried for 24h at the temperature of 110 DEG C in a drying oven, and a needed productis obtained. The preparation process is simple, the removal rate of the prepared modified activated carbon fiber filter screen reaches 100% when the formaldehyde concentration is 15 mg / m<3>, and the removal rate can be maintained for a long time.

The invention belongs to the technical field of protection of electric materials, and discloses antirust paint for the electric materials. The antirust paint is prepared from defoamer, coalescing agent, petroleum sodium sulfonate, sodium carboxymethylcellulose, silica gel powder, nanometer aluminum powder, mica powder, silicone emulsion, iron oxide red, normal butanol, n-butyl acetate, crylic acidand deionized water. The antirust paint has good rust resistance and corrosion resistance, and the preparing technology is easy and feasible.

The invention discloses a preparation method of a stacking-coral-like biomass-charcoal-based catalyst. The preparation method comprises the following steps: cleaning and crushing a biomass raw material, and conducting carbonizing under the protection of inert gas; performing grinding, then carrying out washing with water to remove impurities on the surface of a carbonized material, and then conducting drying to obtain a biomass-charcoal-based carrier; mixing the biomass-charcoal-based carrier, a nitrate solution and nitric acid in a reaction kettle, and then performing a hydrothermal reaction to prepare a biomass-charcoal-based catalyst precursor; and roasting the biomass-charcoal-based catalyst precursor in an inert atmosphere to obtain the stacking-coral-like biomass-charcoal-based catalyst. Compared with a traditional impregnation method, the catalyst prepared by the method disclosed by the invention has the advantages that an active component has a unique morphological structure, so the active component is exposed more sufficiently, and the catalyst can adapt to different flue gas atmospheres to remove different sulfur-containing gases; the activity of the catalyst is higher, penetration time is longer, and the sulfur capacity of the catalyst is larger; and raw materials are wide in source, cost is low, and the method is suitable for industrial production and market popularization and application.

The invention discloses a method for modifying an activated carbon fiber filter screen for removing formaldehyde with a relatively high concentration in the air and its product and application, including activated carbon fiber filter screen pretreatment, activated carbon fiber filter screen ozone surface strong oxidation treatment, drying treatment, filtration Ammonium sulfate modification treatment and drying treatment, the obtained activated carbon fiber filter was laid flat, and dried in an oven at 110° C. for 24 hours to obtain the desired product. The preparation process of the present invention is simple, and the prepared modified activated carbon fiber filter screen has a concentration of formaldehyde of 15 mg / m 3 When the removal rate reaches 100%, and can last for a long time.

The invention provides a modified small-pore molecular sieve adsorbent, and a preparation method and a use thereof. The modified molecular sieve adsorbent comprises: a carrier; and an active componentloaded on the carrier, and the active component comprises an alkaline earth metal and / or a transition metal, wherein a weight ratio of the active component to the carrier is 0.01-0.5, preferably 0.01-0.3 and more preferably 0.02-0.2; and the carrier comprises a molecular sieve having an average pore size of 0.001-2 nm. The modified molecular sieve adsorbent can adsorb ammonia gas at normal temperature (20-30 DEG C), has the characteristics of large adsorption capacity and long penetration time, and can well meet the practical application requirements. The modified molecular sieve adsorbent ofthe present invention can be used for recovering ammonia gas generated by agricultural sources such as breeding industry plants, and also can be used to treat industrial flue gas and escape ammonia generated in motor vehicle (diesel vehicle) tail gas SCR systems.

A refrigeration assisted adsorption type VOCs (volatile organic compounds) recovery device and recovery method belongs to the fields of energy utilization, resource recovery, environmental protection and the like. The device comprises a coarse filtration unit, a cooling unit, an absorption device, a fan, a vacuum pump and a branch diversion channel which are sequentially connected. The method comprises steps of coarse filtration, cooling for vapour removal and gas mixture cooling, adsorption, heating assisted vacuum desorption, cooling capacity recovery, exhausting and the like sequentially. The cooling unit comprises an evaporator, a compressor, a forced air cooling condenser, a liquid storage tank, a throttle valve and the like. The cooling unit is used for removing vapour in a gas mixture, and reducing the temperature of the gas mixture, so as to remarkably improve the subsequent absorption effect and prolong the service cycle of the absorption device. The recovery device is high in recovery efficiency, relatively low in cost, simple in structure, long in service life, and easy to control and operate, and is particularly suitable for recovery processing of low concentration VOCs, which are not suitable for condensation methods, in chemical engineering, automobile industry and other fields.

The invention relates to a farmland irrigating machine. According to the graphical representation and introduction and a trial result, the farmland irrigating machine has several outstanding expressions that 1, a water spray area is large, water flow is dispersed, and water flows slowly and does not have impact force on crops and the ground, so a farmland is irrigated uniformly, and water has enough time to permeate into soil; 2, the farmland irrigating machine can move automatically, so the physical labor of peasants is relieved; 3, the farmland irrigating machine can be folded, and is convenient to move; 4, raw materials are sufficient, and the farmland irrigating machine does not rust and is not obsolete; 5, joints of pipe fittings are movable joints and are convenient to disassemble and maintain; 6, the farmland irrigating machine is easy to manufacture, and can be manufactured by simple trainings; 7, large equipment is not needed to be invested; and 8, the production cost is low, namely the price of a complete set of equipment is about 1 thousand yuan, so the peasants can accept the price easily under the current economic condition. Therefore the farmland irrigating machine can be widely popularized.

The invention relates to a molecular sieve ceramic membrane material for olefin purification as well as a preparation method and application of the molecular sieve ceramic membrane material. In the molecular sieve ceramic membrane material, the particle sizes of molecular sieve particles supported on the surface of the ceramic material are 0.1-3 [mu]m, and the thickness of a molecular sieve layeris 3-5 [mu]m; during preparation, ceramic material pretreatment, molecular sieve seed crystal pre-coating and sealed crystallization are sequentially carried out; and the molecular sieve ceramic membrane material is used for removing a polar oxygenated compound in a gaseous olefin flow to be 1ppm or below. Compared with the prior art, the molecular sieve ceramic membrane material prepared by the preparation method of the invention has the molecular sieve layer with higher mechanical strength, larger specific surface area and uniform thickness, in addition, the molecular sieve layer has no longitudinal or horizontal cracks, has no air pores in the surface and is high in bonding strength and not easy to fall off; and when the polar oxygenated compound in the olefin flow is adsorbed, the purification depth is 1ppm or smaller, so that not only is the mass transfer resistance lower, but also the energy consumption is lower, and the regeneration capacity is high.

The invention discloses waterborne antirust paint and a preparation method thereof. The waterborne antirust paint is prepared from, by mass, 10-25 parts of waterborne acrylic acid modified epoxy ester, 0.6-1.2 parts of neutralizer, 20-30 parts of deionized water, 0.5-1.5 parts of dispersing agents, 0.2-0.5 part of defoaming agent, 14-18 parts of iron oxide red, 2-4 parts of mica powder, 6-10 parts of modified zinc phosphate, 10-14 parts of precipitated barium sulphate, 1-2 parts of propylene glycol, 10-15 parts of styrene-acrylic emulsion, 0.5-1.0 part of coalescing agent, 0.5-1.0 part of waterborne flush rust prevention agent, 0.5-1.5 parts of thickening agents and 0.2-0.5 part of mildew prevention agent. The waterborne antirust paint is high in film hardness, good in adhesive force and excellent in corrosion-resistant performance and mechanical performance, dryness and initial water resistance of paint films are remarkably improved due to the addition of styrene-acrylic emulsion, and the flush rust restraining performance of paint films is improved due to the addition of the waterborne flush rust prevention agent. Water serves as the diluent for the waterborne antirust paint, VOC emission in production and construction projects is greatly reduced, and the waterborne antirust paint is safe, environmentally friendly and capable of being widely used for paint coating on the aspects of steel structures, pipelines, automobile parts and the like.

The invention discloses a material for deep removal of ammonia nitrogen from water, and a preparation method and an application method of the material. The preparation method comprises the following steps: adopting natural zeolite powder as a main raw material, adding a binder and a foaming agent, proportioning above materials, mixing all the materials, molding the obtained mixture, cutting the molded mixture, and carrying out autoclaved curing to obtain the zeolite aerated concrete particle material with the particle size of 10-30mm, small apparent density and high open porosity. The material can selectively adsorb ammonia nitrogen in water, and is a high-efficiency microbial carrier material; and a nitrogen removal treatment tank is filled with the material, and then adsorption, water emptying, blasting oxygen introduction and water leaching are sequentially carried out to make the concentration of ammonia nitrogen in water be smaller than 1.5 mg / L.

The invention provides a composite molecular sieve, a desulfurization adsorbent, a preparation method and application thereof. The preparation method of the composite molecular sieve comprises: adding the template agent for preparing the mesoporous molecular sieve into the alkali solution, and stirring to obtain a clear solution; The source is added into the suspension to carry out stirring reaction, and after the reaction, it is filtered, dried and calcined to obtain a composite molecular sieve. The raw material composition for preparing the desulfurization adsorbent includes: 30-70 parts of composite molecular sieve, 1-10 parts of Group IA and / or Group IIA metal oxygen compound precursor and 30-60 parts of binder. The desulfurization adsorbent of the present invention has high adsorption capacity, good selection, high desulfurization precision, can be recycled and utilized, and has a long service life; the desulfurized carbon five oil can be directly used as a raw material for high-value utilization by using the desulfurization adsorbent.