39results about How to "Solve easy coking" patented technology

he invention provides a method for producing olefin. The method comprises step of placing cracking raw materials in a cracking furnace tube for cracking, so as to obtain the olefin. The cracking furnace tube comprises a cracking furnace tube matrix, and an inert coating attached to an inner wall of the cracking furnace tube matrix. The inert coating can prevent contact between coke and cracking furnace tube matrix, but does not react with the cracking raw materials and / or cracking products; the inert coating has a porous structure with average pore radius of 0.5-15nm, and specific surface area from 1m<2> / g to less than 150m<2> / g; the inert coating can also catalyze reaction between coke and water vapor; or the inert coating surface is attached by an active catalytic layer capable of catalyzing reaction between coke and water vapor; or the inert coating can catalyze reaction between coke and water vapor, and is also attached by an active catalytic layer capable of catalyzing reaction between coke and water vapor. The method for producing olefin provided by the invention has simple operation and good anti-coking performance.

The invention relates to a method and system for preparing low-carbon olefins. The method is carried out as follows: the crude oil is sent to the first tube group of the convection section of the cracking furnace for preheating, and then vapor-liquid separation is performed to form a first vapor phase and a first liquid phase. phase; the first liquid phase is sent to the first tube group of the convection section for preheating, and the preheated first liquid phase is distilled to form a tower top fraction, a middle distillate and a tower bottom fraction; the tower bottom fraction is subjected to hydroprocessing , to obtain circulating hydrogen, light components after hydrogenation and heavy components after hydrogenation; mix the top distillate with the middle distillate, mix with the first vapor phase, and light components after hydrogenation, and send them to the cracking furnace for cracking to obtain a low carbon olefins. The present invention adopts the combination of cracking furnace, vapor-liquid separation unit, distillation unit and hydroprocessing unit, which can effectively solve the problems that the heavy cracking raw material cannot be fully gasified in the convection section and is easy to coke in the radiation section and the quenching section.

A high-efficiency coke-free briquette boiler, including a furnace body, a furnace, a smoke chamber, a high-level water tank, a preheater and a dust collector. Including the outer furnace body, outer water jacket and inner smoke chamber; the furnace includes the combustion zone and the air chamber; the high-level water tank is respectively connected with the outer water jacket and the preheater; the preheater is connected with the water inlet pipe, and the preheater is connected with the inner and lower water jacket Connected; the inner and lower large water jackets are connected with the outer water jacket; the outer water jacket is connected with the outlet pipe; a water level gauge and a water level controller are installed in the high water tank, which are respectively connected with the outer water jacket and the preheater. The present invention utilizes the design features of the water-cooled wall tube and the air chamber, so that there is sufficient air circulation in the furnace, the briquettes are fully burned, and a large amount of nitrogen oxides cannot be formed, which reduces the discharge of nitrogen oxides, reduces urban pollution, and The flame in the combustion area is scattered, and it also solves the problem of easy coking in traditional small hand-burning furnaces. It is an environmentally friendly, high-efficiency and energy-saving new boiler.

The invention relates to a method and system for preparing low-carbon olefins from crude oil. The method is carried out as follows: the crude oil is sent to the first tube group in the convection section of the cracking furnace for preheating, and then vaporized to form the first vapor phase and the second steam phase. One liquid phase; the first liquid phase is sent to the first tube group of the convection section of the cracking furnace to be preheated and then distilled to form an overhead fraction, a middle fraction and a bottom fraction; the overhead fraction, the middle fraction and the first After the steam phase is mixed, it is sent to the second tube group of the convection section of the cracking furnace, and after being heated to the crossing temperature, it is sent to the radiation section for cracking to obtain cracked gas; the bottom fraction is subjected to deep catalytic cracking to obtain deep catalytic cracking gas, which is then combined with the The cracked gas is separated to obtain light olefins. The invention adopts cracking furnace to cooperate with vaporization treatment unit, distillation unit and deep catalytic cracking unit, which can effectively solve the problems that heavy cracking raw materials cannot be fully gasified in the convection section and are easy to coke in the radiation section and the quenching section.

The invention relates to the technical field of waste incineration power generation, and discloses a waste incinerator. The waste incinerator comprises a drying area, a main combustion area and a burnout area, wherein the main combustion area comprises a hearth, the hearth comprises a rear wall and two side walls which are connected with one another; the rear wall and the two side walls are all heat insulation furnace walls, new water cooling walls covered with the heat insulation furnace walls are arranged on the inner side walls of the heat insulation furnace walls; and the invention furtherdiscloses a construction method of the waste incinerator. According to the waste incinerator and the construction method, the problems that the furnace wall near the main combustion area of an existing waste incinerator is easy to coke is effectively solved.