137results about How to "Reduce CO content" patented technology

The invention discloses a coal-grading conversion poly-generation device and a method for producing coal gas, tar and carbocoal on a circulating fluid bed. The device combines a circulating fluid bed gasification-furnace with a fluid bed gas retort. The gas retort is a normal-pressure fluid bed and uses circulating coal gas as the fluidizing medium; fuel is firstly heated and cracked in the gas retort to precipitate high-heating-value fugitive constituents comprising coal gas and tar; the heat absorbed by the gas retort is provided by a high-temperature thermal-circulation material in the circulating fluid bed gasification-furnace; the carbocoal part obtained after the coal is retorted is cooled and discharged through the bottom of the gas retort, and part of the carbocoal is conveyed to the circulating fluid bed gasification-furnace along with the circulating material to heat the circulating material; and the medium-temperature coal gas from the gas retort is processed in a dust removal way and cooled by a coal gas purification system, the tar is recycled, and the purified coal gas is output for industrial and civil use, thereby realizing the poly-generation of coal gas, tar and carbocoal in one set of device and realizing the grading conversion and the high-efficiency comprehensive utilization of coal.

The invention discloses a solid waste innocent treatment device and a solid waste innocent treatment method. The solid waste innocent treatment device comprises a solid waste pyrolysis gasifier, a fuel gas oxygen replenishment premixing and filtering chamber, a fuel gas combustion chamber, a dechloridation and desulfurization drying device and a solid waste pretreatment device which are sequentially communicated; the solid waste innocent treatment device also comprises a biomass pyrolysis gasifier and a tail gas treatment device, wherein the biomass pyrolysis gasifier is communicated with the fuel gas oxygen replenishment premixing and filtering chamber; the tail gas treatment device is communicated with the top of the dechloridation and desulfurization drying device. When the method and the device are used for treating solid waste, the content of Dioxin in a detected emitted tail gas is lower than 0.023ng/m<3>, and the emission allowances of other gases, such as CO, SO2, HC1 and NOx, are also highly superior to the emission standard (GB18485-2014) issued by the nation in July 1st, 2014, and can completely meet the requirement of environment-friendliness.

The invention provides an autothermal reforming hydrogenation catalyst and a preparation method thereof. The catalyst takes one or more than one of platinum precious metal Pt, Pd, Ru, Rh and Ir as a main catalytic active component, and takes one or more than one of alkali metal and/or alkaline earth metal oxide Na2O, K2O, MgO, CaO, SrO and BaO, as well as a CeO2-based binary or ternary rare earth compound as a catalytic promoter. The catalyst can be applied in the form of a granular catalyst, and the entire catalytic active components and the catalytic promoter can also be borne on monolithic carriers such as honeycomb ceramics, metallic honeycomb, metal foam and so on, to produce a monolithic catalyst. The catalyst provided by certain embodiments has the advantages of high activity, low CO content in product gas, impact resistance, and long service life; and the quality of the catalyst can be further improved through the preparation method and a use method after the improvement, for example, a CeO2-based compound oxide is produced into a single-phase sosoloid, the catalyst is reduced before the use, etc.

The invention relates to a low water-air ratio and middle water-air ratio carbon monoxide (CO) conversion process. The process comprises the following steps of: (1) feeding raw gas into a pre-converter, wherein the temperature of the raw gas entering the inlet of the pre-converter is between 210 and 250 DEG C and the mole ratio of water to dried gas is 0.21 to 0.23; (2) feeding pre-converted mixed gas into a first converter to perform depth conversion, wherein the temperature of the pre-converted mixed gas entering the inlet of the first converter is between 260 and 290 DEG C and the mole ratio of water to dried gas is 0.8 to 1.0; (3) feeding the mixed gas passing through the first converter into a second converter, wherein the temperature of the mixed gas entering the inlet of the secondconverter is between 220 and 250 DEG C and the mole ratio of water to dried gas is 0.5 to 0.7; (4) feeding the mixed gas passing through the second converter into a third converter, wherein the temperature of the secondary conversion mixed gas entering the inlet of the third converter is between 205and 235 DEG C; and performing conversion on the mixed gas by using the third converter to obtain the mixed gas with the CO content lower than 0.40 percent. The process is unique and has the characteristics of high CO conversion rate, low energy consumption in the conversion process and the like.

The present invention discloses one kind of Cu-Zr catalyst for steam reforming of methanol to prepare hydrogen and its preparation process. The catalyst without Zn and Al components contains CuO10-80 mol%, ZrO2 20-90 mol% and MOx 0-20 mol%, where M is one of Ce, La, Fe, Y and Mn. The Cu-Zr catalyst is used for steam reforming of methanol to prepare hydrogen, and has high activity, high hydrogen selectivity and very high stability. Specifically, it has conversion rate in steam reforming of methanol of 90-99 %, hydrogen selectivity of 95-99 % and CO content in the product lower than 0.5 %.

The invention discloses a natural gas hydrogen preparation and proton-exchange film fuel cell integrated generation method and a device thereof. The high-temperature fluid side of a fourth heat exchanger of the device is respectively connected with the high-pressure side of a film separator and a pressure adjusting valve; the low-temperature fluid side is connected with a pipeline between a compressor and a third heat exchanger; the high-temperature fluid side of the third heat exchanger is respectively connected with a fuel gas outlet and an exhaust pipe of a reforming reactor, and the low-temperature fluid side is respectively connected with the compressor and the inlet of the reforming reactor. The invention utilizes hydrogen-preparing raw material gas harmless to the proton-exchange film fuel cell, namely the natural gas, as blowing gas at the inner side of a palladium film and decreases the partial pressure of the hydrogen at the inner side of the film so as to improve the hydrogen partial pressure difference inside and outside the film and improve the whole generation efficiency of the natural-gas reforming hydrogen preparation system and the fuel cell integrated generation system. The invention has simple design, good system heat match and high energy utilization rate and provides a new technological method for the natural gas reforming palladium film hydrogen preparation and proton-exchange film fuel cell integrated generation.

Disclosed herein are wall flow reactors that are suitable for the production of hydrogen gas from hydrocarbon and/or its derivative feed streams. The wall flow reactors are generally comprised a monolithic honeycomb substrate defining a plurality of cell channels bounded by porous channel walls that extend longitudinally from an upstream inlet end to a downstream outlet end; wherein a first portion of the plurality of cell channels are plugged at the downstream outlet end to form inlet cell channels and a second portion of the plurality of cell channels are plugged at the upstream inlet end to form outlet cell channels. A plurality of catalyst layers are positioned within at least a portion of the plurality of cell channels and comprise at least a first catalyst layer and a second catalyst layer. Also disclosed are methods for treating reactant feed streams.

The invention relates to an ammonium salt-containing tobacco leaf reproduced by means of rolling. The tobacco leaf comprises the following components in parts by weight: 0.4-0.8 part of ammonium salt, 0.2-0.4 part of amino acid, 100 parts of dry material and 66-67 parts of wet material. Compared with the tobacco leaf reproduced by means of rolling, the ammonium salt and the amino acid are added into ammonium salt-containing tobacco leaf reproduced by means of rolling, thereby being capable of reducing the impure gas and the piquancy of the reproduced tobacco leaf, so that the ammonium salt-containing tobacco leaf has abundant fragrance; improves the remaining smell; leads the tobacco leaf with heavy impure gas, dirty oral cavity and piquancy feel to have natural tobacco fragrance; has unconspicuous impure gas and piquancy fell; leads the tobacco gas to have sweet and wet feel; can clean the oral cavity; and is smooth to a throat. The reproduced tobacco leaf not only improves the quality of sense organ, but also reduces the content of objectionable constituents such as phenol, CO and the like, and the content of tar, CO and the like in smoke indexes.

The invention discloses a catalyst and a preparation method thereof, in particular to a hydrogen production catalyst with high-temperature methyl alcohol water vapour and a preparation method thereof. The catalyst comprises active components of VIII group metal and auxiliary agent and also comprises modified Al2O3 spherules serving as a carrier, wherein, the sharing carrying capacity of the active components occupies 2.6-10wt% of the carrier, and the ratio of the active components to the auxiliary agent ZnO is 0.24-0.38:1. The catalyst has high reaction activity, high stability and simple manufacturing method, can lower cost and adopts the method of cocurrent flow dipping and ultrasonic dispersion, so that noble metal has small use amount and little waste, which can satisfy the requirement of the activity and service life of catalyst by industrialization. The catalyst of the invention can be applied in the fuel battery hydrogen supplying field on a large scale.

The invention provides a method for preparing a synthetic natural gas. The method comprises the step of performing a methanation reaction on a raw material gas which contains CO, CO2 and H2 in the presence of liquid saturated water. The invention also provides a device for implementing the method. The device comprises a methanator which is provided with a raw material gas inlet, a product outlet,and a nickel-based catalysts and liquid water inlet. The method of the invention is convenient and easy, and is suitable for various raw material gases; the ratio of H2 to CO in the raw material gas is improved by a water gas shift reaction; and a great amount of heat released by the methanation reaction is removed fast by vaporizing the liquid saturated water, so that a reaction temperature is controlled effectively, high-temperature carbon deposit of a catalyst is slowed down and the service life of the catalyst is prolonged. The device of the invention has the characteristics of simple structure and convenient operation.

The invention discloses a low cost hydrogen storage alloy which is AB5 type alloy with the general formula of Laa M(1-a) Nib Coc Mnd Ale Cuf, wherein M is at least one in Ce, Pr, Nd, Pm, Sm, Dy, Y, Zr and Ti; a, b, c, d, e and f represent mole ratio with the number range: a is more than or equal to 0.3 and less than or equal to 0.8, b is more than 3.6 and less than or equal to 4.1, c is more than 0 and less than or equal to 0.15, d is more than or equal to 0.3 and less than or equal to 0.65, e is more than or equal to 0.04 and less than or equal to 0.35, f is more than or equal to 0.3 and less than or equal to 1.0, and the sum of b, c, d, e and f is more than or equal to 5.1 and less than or equal to 5.35. The hydrogen storage alloy has CaCu5 crystal structure, and the ratio (c/a) of lengths of c axis and an axis of the CaCu5 crystal structure is more than or equal to 0.81. The invention also discloses a preparation method of the hydrogen storage alloy as well as the application thereof in negative pole material of a nickel-metal hydride battery. The hydrogen storage alloy has low cost, good activation performance, large discharge capacity and long cycle life.

The invention discloses a purifying exhaust structure for a road tunnel, which comprises a draught opening, a draught pipe communicated with the draught opening, a tunnel polluted air purifying device connected with the draught pipe, a fan connected with the tunnel polluted air purifying device, an exhaust pipe connected with the fan, and air exhaust opening communicated with the exhaust pipe. The structure overcomes the drawbacks of an exhaust airway and exhaust tower scheme and a tunnel opening direct polluted air exhaust scheme, radically solves the problem that the sites of the exhaust airway and exhaust tower for the road tunnel are difficult to select and the problem that the exhaust airway and exhaust tower for the road tunnel are unfavorable for landscape and greatly reduces the pollution of the tunnel to the atmospheric environment.

The invention discloses a high-efficiency burner of a blast type gas cooking appliance. The high-efficiency burner comprises a main burning torch (1), an eternal torch (2) and an air ring (3). The air ring, which is in the shape of an annular groove and surrounds the outer wall of the lower part of the main burning torch, is arranged between the main burning torch and the eternal torch; when the burner works, air flow supplied by a fan enters the air ring through an auxiliary air hole in the lower part of the main burning torch, and then is guided by the air ring to form air jet flow which surrounds the outer wall of the main burning torch, is positioned between the main burning torch and the eternal torch and is jetted upwards; when no iron pan is erected on the gas cooking appliance, the air jet flow does not interfere the normal burning of main burning torch flames and eternal torch flames; when the iron pan is erected, the air jet flow automatically participates in pan bottom mixed torch flames consisting of the main burning torch flames and the eternal torch flames to help burning, so that incomplete burning of the pan bottom mixed torch flames due to oxygen insufficiency is avoided according to the technical scheme. Therefore, the blast type gas cooking appliance achieves the aims of enhancing the burning rate, stabilizing the burning and lowering the content of CO in waste gas.

The invention discloses a green and efficient incineration method for hazardous waste in a rotary kiln based on oxygen enriched air supply in a secondary combustion chamber. The method comprises the steps of (1) adding solid waste, liquid waste and a first combustion-supporting gas to the rotary kiln for performing treatment; (2) feeding the waste and the liquid waste which are treated by means ofthe rotary kiln and a second combustion-supporting gas into a secondary combustion chamber for performing combusting treatment; and (3) exhausting the gas which is obtained after the combustion in the secondary combustion chamber, wherein the second combustion-supporting gas is formed by mixing air and an oxygen enriched gas; the incineration temperature in the secondary combustion chamber is risen to 1,100 to 1,200 DEG C; the oxygen concentration of the second combustion-supporting gas is 23 to 28 percent; the oxygen content of a combustion environment in the secondary combustion chamber isimproved, and a technical means of the preheating is effectively utilized, which are beneficial to removing nitrogen oxides from flue gas in a waste heat utilization system under the condition of ensuring complete decomposition of the harmful substances, such as dioxin; the production and emission of secondary environment pollution substances in an incineration processing process are avoided or remarkably reduced; and efficient and green treatment of maximum reduction of the hazardous waste is realized.

The invention relates to a sintering flue gas denitration direct-fired type heating device. The sintering flue gas denitration direct-fired type heating device comprises a gas pipe (1) and a sinteringflue gas pipe (2), wherein the gas pipe and the sintering flue gas pipe are respectively connected with a gas chamber (42) and an oxidant gas chamber (41) of a direct-fired heating device body (4), and the oxidant gas chamber (41) and the gas chamber (42) are sequentially connected with a mixing combustion chamber (43) and a flue gas heating chamber (45), an inlet of flue gas heating chamber (45)is connected with a GGH heat exchanger (3), an outlet of the flue gas heating chamber (45)is connected with a denitration flue (7), an ammonia injection gird (8) is arranged above the denitration flue (7), a denitration catalyst (9) is arranged in a denitration reactor (6), the denitration reactor (6) is connected with the GGH heat exchanger (3), the GGH heat exchanger (3) is connected with an induced draft fan (10), and an outlet of the induced draft fan (10) is connected with one chimney (11). The sintering flue gas denitration direct-fired type heating device has the advantages of ensuringthe denitration efficiency, reducing CO content in flue gas and heated gas volume, and energy conservation and emission reduction.

A low-height boiler is composed of chimney, main body, firebox consisting of upper heat exchanging chamber and lower combustion chamber, coal feeder, ash discharger and power unit for coal feeder andash discharger. Said upper heat exchanging chamber is composed of common channel for exhausting smoke and feeding coal, reverse U-shaped water jacket, heat exchanging tubes, and water outlet tube. Said combustion chamber consists of external and internal water tubes and horizontal water tube. Its advantages are less floor area, big heat exchange area and high thermal efficiency.