Why is the operating range of the space furnace 60-110%?

Does writing them separately earn more points? Feed load: 40%; at this level, the oxygen-to-coal ratio is higher than normal.

This post was last edited by jensse on 2015-9-28 at 10:50. The load range is 60%~110%; this is mainly due to considerations related to water cooling. At saturation, a load of 60% corresponds to a pressure of 2.4 MPa, with a vapor pressure of around 1.4~1.6 MPa, resulting in a temperature of approximately 160 degrees. From the perspective of pressure and temperature, this value has little significance for subsequent system (purification) processes

You mean the load is low, the vapor pressure is too high, and heat loss is significant.

The material cost is already 40% – can it be reduced further? Why?

Are these the design requirements? Gasification furnaces are designed to have a certain degree of operational flexibility. The upper limit is generally 10% higher, while the lower limit is usually around 50–60%, depending on the requirements of the designers and clients.

The lower load limit is determined on the one hand to ensure the stability of the coal powder pipeline, and on the other hand because the furnace wall of the space furnace is a water-cooled wall; too low a load results in insufficient heat to maintain normal gasification reactions, and the slag outlet is also prone to clogging. When the load is too low, the flame of the burner is shorter, which can easily cause ablation at the burner tip. The load limit is primarily determined by the fact that there is a certain relationship between the load and the pressure in the gasifier. To maintain the flame shape of the burner when the load is high, the pressure in the vaporization furnace must increase; the design pressure for space furnaces is generally around 4.0 MPa. Additionally, the increase in pressure in the gasifier also poses a challenge to the inert gas in the pulverized coal pipeline. The above are my personal opinions; I hope everyone will feel free to share their views.

The load is too low and the temperature is also low, resulting in incomplete combustion of the coal powder. I’m not sure if it has an impact on air flow transport – is the load too low?

Design! Design! There were too many discussions about operations on the upper floors; people went down the wrong path. A minimum load of 50–60% is the required operational flexibility for conventional chemical plant design. Except in certain industries such as power generation boilers, where the difference between electricity use during off-peak and peak times is significant and the threshold may drop to 25%, chemical processing plants generally aim for stable operation over long periods; a load level of 50-60% already represents low-load operation. Another factor is the high cost of equipment investment; long-term low load operation leads to a decline in economic efficiency. Secondly, there are issues related to control and measurement, as well as problems with equipment selection and procurement. As for the concern that excessive heat transfer from the water wall leads to low operating conditions, this is rarely an issue in practice: generally, the oxygen-coal ratio is increased to compensate for the heat loss.

Learning*:lol:lol:lol

The operational flexibility must be at least 40%, or 50% – meaning that the system cannot operate stably under such loads, rather than it being a matter of inefficiency? Please ask your friend to speak of the essential things.