Does the hot blast stove burn coal or natural gas?

A large amount of coal is used for heating, while very little gas is used; switching to gas requires significant costs for modifying the hot air stoves.

This post was last edited by Chemical Gas Purification on 2011-6-29 at 20:43. What more needs to be changed? The internal structure of hot air stoves that use coal and those that use natural gas is different; it’s better to simply buy a gas-powered hot air stove. Natural gas is clean and hygienic; it burns completely without producing any pollutants, and there is no need for complicated processes such as desulfurization or denitrification. It features a high degree of automation, is safe and reliable, and does not require human intervention. This means that it eliminates the cost associated with the need for additional staff compared to coal-fired boilers. With coal in such short supply these days, some power plants can’t even get any coal, and prices show no sign of falling. Chongqing has such an abundance of natural gas; it can be used directly through pipelines, which also saves on the costs associated with transporting coal and the fees needed to dispose of slag. So why not use natural gas? Another important point is that hot air stoves that use natural gas can operate in a direct combustion mode, with air being mixed directly in the combustion chamber; this results in high heat exchange efficiency, with nearly 100% of the heat being utilized ； Moreover, temperature control is easy, with automatic adjustment; the temperature fluctuates by no more than 1 degree. (Even current food drying uses direct combustion methods.) If clean hot air is required, coal-fired hot air generators must employ indirect heat exchange; this results in low heat exchange efficiency, difficulty in controlling temperature, and significant heat loss.

Why switch to natural gas? We have plenty of coal but little oil and even less gas; now we’re already starting projects to convert coal into natural gas, so why change anything? It’s better to just keep using coal

Everyone has their own arguments; the decision should be based on one’s specific circumstances, such as requirements regarding product quality, the difficulty of obtaining fuel, costs, and a whole range of other factors； Our company has gone through a lot, so we recommend that you get a stove that can work with gas, coal, or oil. It’s not that complicated at all – if you can use coal, then you can also use oil and gas; it’s not a hassle. But overall, natural gas is definitely the best option – it’s clean and hygienic, can be fully automated, and the quality of the product isn’t affected at all.

We have been using coal-fired hot air furnaces; environmentally speaking, they are supposed to be replaced with natural gas starting next year, otherwise production will not be allowed. Ah, relationships are tough these days. In Chongqing, it’s still cheaper to use coal for heating. What was mentioned on the 4th floor are all factual situations, but the cost of making the necessary modifications is extremely high; even the pipes have to be paid for by the company itself.

Either one is fine; coal-fired boilers are usually vertical, while gas boilers can be either vertical or horizontal

Our company uses natural gas; we produce urea with natural gas, and those hot air furnaces are completely insignificant.

Coal burning requires a dedicated person to oversee it, and the furnace temperature fluctuates significantly. The advantages of gas burning are rapid temperature rise, stable furnace temperature, and environmental friendliness as there is no slag produced.

I have a question I’d like to ask everyone: could there be a concentration of water vapor in the gas or exhaust gases, and could that affect the drying process?