What is the relationship between the negative pressure value and the furnace temperature?

Film, Books, Broadcasting Group: Open with the app, write articles, fast downloads. Open – Regarding furnace negative pressure: Furnace negative pressure is a parameter that indicates the pressure level inside the furnace. However, when trying to understand this concept of negative pressure, people often confuse it with the absolute pressure inside the furnace. Both are parameters that reflect the pressure conditions inside the furnace, but their measurement bases are different, and as a result, the values obtained are also opposite to each other! There are two ways to express pressure: one is called absolute pressure (which can also be understood as true pressure), and it is the pressure value obtained by using absolute vacuum as the reference point. Another type is called relative pressure, which is a pressure value determined by using the local atmospheric pressure as a reference point. Relative pressure is further divided into gauge pressure and negative pressure (vacuum pressure). When the actual pressure at a measured point is higher than the local atmospheric pressure, that point is under positive pressure, and the corresponding relative pressure is commonly referred to as gauge pressure. The greater the gauge pressure, the higher the absolute pressure (true pressure) at the measured point as well ； Many pressure measurements taken at the site, which are under positive pressure, are generally relative pressures, that is, gauge pressures ； When the actual pressure at the point being measured is lower than the local atmospheric pressure, that point is in a negative pressure state; the corresponding relative pressure is negative. The absolute value of this negative number represents our measurement value, which is commonly referred to as the vacuum value or negative pressure value. The negative pressure value inside the furnace also refers to this value, and it is not the same as absolute pressure. The higher the vacuum value (negative pressure value), the greater the difference between the absolute pressure at the measured point and the local atmospheric pressure! When the measured point is under negative pressure, the concept of a vacuum value means that the way pressure is expressed is somewhat more complex compared to the case of positive pressure. Positive and negative pressure protection in the furnace is an important safeguard to prevent abnormal situations from occurring during operation, which could lead to an \"internal explosion\" or \"external explosion\" of the furnace, thus ensuring the safety of the boiler. An external explosion occurs when the positive pressure inside the furnace becomes too high, exceeding the structural strength of the boiler’s water wall or flue ducts, resulting in tearing or bulging damage to the furnace or flue ducts ； An internal explosion occurs when the negative pressure in the furnace is too high, causing the furnace or the flue and air ducts to be crushed by atmospheric pressure. High positive pressure in the boiler is a precursor signal to furnace deflagration, while high negative pressure is a precursor signal to boiler shutdown. Therefore, accurately detecting changes in the pressure inside the furnace and taking appropriate, preemptive protective actions to ensure the safe shutdown of the unit plays a vital role in preventing furnace damage accidents

The negative pressure is high, which increases the suction force inside the furnace; as a result, the flame height rises and the furnace temperature goes up as well；