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280results about How to "Control amount" patented technology

Incineration treatment device for nitrogen-containing organic wastes and incineration treatment process

The invention discloses an incineration treatment process for nitrogen-containing organic wastes, which includes: a, sending wastes into an incinerator to incinerate at a high temperature and maintaining the incineration temperature by injecting after-burning fuel; b, injecting combustion-supporting air which is divided into primary air and secondary air according to a certain proportion into a fire chamber for supporting combustion; c, injecting reducing agents to the tail of a hot oxidation furnace and reducing part of NOx in flue gas by the SNCR (selective non-catalytic reduction) method; d, leading high-temperature flue gas from the hot oxidation furnace into a waste heat boiler to recover part of heat; e, leading the flue gas from the waste heat boiler into an SCR(selective catalytic reduction) treater to reduce content of NOx in flue gas further; and f, further recovering afterheat of flue gas by the aid of an air preheater arranged at the downstream of the SCR treater and then discharging flue gas through a chimney. The incineration treatment process is simple and low in cost for incineration of organic wastes, denitration efficiency can be guaranteed by a two-stage denitration process, emission standards can be met, afterheat of flue gas can be recovered, and accordingly the incineration treatment process can be applied to the similar organic waste treatment projections in the chemical industry.
Owner:天津辰创环境工程科技有限责任公司

Environment-friendly formaldehyde preparation process

The invention relates to the field of chemical production, and in particular relates to an environment-friendly formaldehyde preparation process which comprises the following steps: gasifying methanol, mixing with air, and conveying the mixed gas into a preheater, wherein the preheating temperature is 100 DEG C; then reacting, wherein the temperature inside a reactor is 200 DEG C, an iron-molybdenum catalyst is used as a catalyst, and the reaction time is 2-5 minutes; keeping the temperature inside the reactor to be 270-300 DEG C, reducing the temperature of formaldehyde discharged from the reactor to 100-120 DEG C, feeding into an absorbing tower, diluting inside the absorbing tower, sucking out when the concentration is 37-50%, circulating 20% of formaldehyde back to the absorbing tower, and pumping the other part of formaldehyde as a product to a formaldehyde storage tank; recycling 60-90% of the gas discharged from the top of the absorbing tower by using a blower; and feeding the other part of the gas into a tail gas reactor for oxidation reaction at 200-300 DEG C. According to the process, the heat in production is sufficiently utilized, the parameters are strictly controlled, the methanol conversion rate of the process is greater than 98%, the purity of formaldehyde is 37-50%, the content of formaldehyde, methanol and carbon monoxide in the tail gas is all zero, and the content of carbon dioxide is also effectively controlled.
Owner:山东滨州新天阳化工有限责任公司

Gas burner capable of multilevel controlled

A combustion gas burner enabling a multi-stage control is provided, which includes a main casing on the bottom surface of which an air blower is mounted so that air can be supplied from the air blower through an air inlet formed in the lower portion of the main casing, a tube-shaped burner mounted on the main casing in which fire hole units each having a number of fire holes formed at a predetermined distance from one another are disposed on the upper end surface of the main casing in order to burn gas and air which are mixed and supplied to the tube-shaped burner, a plate-shaped burner which is detachably disposed between the fire hole units formed on the upper end surface of the tube-shaped burner, and includes fire hole units having a number of fire holes, a number of mixture supply tubes inserted in the tube-shaped burner and disposed at a predetermined distance so that gas and air are mixed and the mixed gas and air is supplied to the tube-shaped burner and the plate-shaped burner, a Venturi tube installed in front of the mixture supply tubes, mixing gas and air and playing a role of distributing an amount of flow of the mixed gas and air which is needed for independent combustion in each burner, and a manifolder connected to the Venturi tube and the mixture supply tubes, controlling an amount of gas and air. A number of premixed combustion gas burners each having an identical output capacity of the burner, are disposed in parallel with one another and a number of operating burners is varied according to a desired calorie.
Owner:KYUNGDONG NAVIEN
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