46results about How to "Reduce high temperature corrosion" patented technology

The invention belongs to the technical field of low-nitric oxide combustion of W-flame boilers, and relates to a W-flame boiler, in particular to a W-flame boiler with rotational flow pulverized coal burners with primary air and secondary air eccentrically arranged to solve the problems that a W-flame boiler with rotational flow pulverized coal burners arranged on an arch is large in NOx discharge and high in fly ash combustible matter content, scorification occurs on a front wall water wall and a rear wall water wall of a lower hearth, and high-temperature abrasion happens. The W-flame boiler comprises a boiler body, the multiple rotational flow pulverized coal burners, a plurality of exhausting steam nozzles and a plurality of classification wind nozzles. The boiler body is composed of a lower hearth and an upper hearth. The multiple rotational flow pulverized coal burners are evenly distributed on a front arch and a rear arch of the upper hearth. An inner secondary air pipe and an outer secondary air pipe in each rotational flow pulverized coal burner are arranged in the direction far away from the center line of the hearths in an offset manner relative to primary air pipes.

The present invention relates to an internal recycling fluidized bed refuse incineration equipment with viscous melt-phase dechlorination which is used in the field of environment protection. Said equipment includes internal recycling fluidized bed furnace cavity, inclined non-uniformly air-distributing plate, low-speed first ai chamber, high-speed first air chamber, life pipe, refuse fuel inlet, dechlorination agent inlet, slag discharge outlet, secondary air inlet, separation air inlet, thermal decomposition zone, combustion zone and burning zone, etc.

The present invention relates to an internal recycling fluidized bed refuse incineration method with viscous melt-phase dechlorination. Said method includes the following main steps: adopting non-uniformly air-distributing internal recycling fluidized bed, dividing internal recycling fluidized bed furnace cavity into pyrolysis zone and combustion zone, making pyrolysis of refuse, making low-temperature dechlorination, adding secondary air and making incineration, finally discharging slag.

The invention discloses a pulverized coal burner and a boiler with the same. The disclosed pulverized coal burner comprises a heat source and an internal burning chamber, wherein the internal burning chamber ensures that an internal pulverized coal flow has a predetermined excess air coefficient; the heat source is positioned in the internal burning chamber; the internal burning chamber is provided with an inlet, a long cylindrical main burning chamber and an outlet; the heat source can ignite pulverized coal which passes through the internal burning chamber and ensures that the pulverized coal reducibly burns in the internal burning chamber; preferably, the internal burning chamber comprises the main burning chamber and a decelerating inlet section; and the sectional area of the decelerating inlet section is less than that of the main burning chamber. The internal burning chamber of the pulverized coal burner can maintain a smaller air coefficient, so reducing atmosphere is formed inthe internal burning chamber; the pulverized coal reducibly burns in the internal burning chamber, so the pulverized coal flow enters a hearth in the form of high-temperature pulverized coal burning flame to improve the burning stability of the pulverized coal; meanwhile, the reducing burning can also convert a nitrogen element into a reducing intermediate product, so that fuel type nitrogen oxides are prevented from being produced.

Disclosed is a secondary air offset whirl pulverized coal burner for a W flame boiler. The problems of high NOx discharge amount, high fly ash combustible matter content, slag-bonding to water walls of front and back walls of a lower combustion chamber and high temperature corrosion of the W flame boiler which is provided with an existing whirl pulverized coal burner on an arch are solved. A circular ring inner secondary air stop block in the circumferential direction is added in inner secondary air on a dividing cylinder of primary air and inner secondary air of the whirl pulverized coal burner; the angle of the circular ring inner secondary air stop block in the circumferential direction is 180 degrees; a circular ring outer secondary air stop block in the circumferential direction is added in outer secondary air on a dividing cylinder of the inner secondary air and the outer secondary air; the angle of the circular ring outer secondary air stop block in the circumferential direction is 180 degrees; the boundary line in the diameter direction of the circular ring inner secondary air stop block and the circular ring outer secondary air stop block is parallel to the front and back walls of the boiler; the circular ring inner secondary air stop block and the circular ring outer secondary air stop block are mounted on one side close to the center of a combustion chamber. The secondary air offset whirl pulverized coal burner is used for the W flame boiler.