PL104403B1 - THE WAY OF RECOVERING WASTE HEAT - Google Patents

Description

The subject of the invention is a recovery method waste heat, lost from escaping to flue gas generating atmosphere in industrial furnaces, especially fired natural gas, i.e. the way to reduce yes known as the stack loss. The invention is intended it is particularly suitable for use in the glass industry skim ii and in metallurgy * Known methods of waste heat recovery, waste heat due to the escape of hot gases into the atmosphere combustion gases produced in combustion furnaces thinking, is to heat the hot ones flue gas prior to their escape to the charge atmosphere furnace or primary air and / or necessary for proper mileage the process of burning, i.e. the recovery of some physical heat one. Devices in which they give off hot exhaust fumes part of the waste heat in the furnace charge, relatively primary and / or secondary air, they are called heat exchangers, among which a distinction is made between regenerators operating periodically and re- continuously operating cuperatures.

(A disadvantage of the known heat recovery processes is omitted what is important is that, regardless of the type of device, heat exchange occurs through heat transfer from the flue gas to the furnace charge and / or to the air, relatively by heat transfer from the flue gas to components of devices and then through the beam transferring heat from these elements to the furnace charge 2 air and / or air. In either case it is only physical heat.

The essence of the invention is the use of heat the combustion gases produced in the furnace industrial, for endothermic converter reaction the separation of methane from steam, the mixture being a mixture methane and water vapor in the weight ratio CH 4: H 2 O, most preferably 16:18, warmed to temperatures above 950 ° K with the heat of the gases deviating running out of the reaction chamber of the furnace. Newly established a gas mixture of carbon monoxide and hydrogen was introduced it is then put into combustion in the reaction chamber of the furnace.

[An advantage of the method of the invention is that obtained by a heat-absorbing reaction converting methane from water vapor to an oxide mixture carbon and free hydrogen is about 2.500 (the age ofJsiza calorific value than used in the production of this city methane gas.

A practical example of using the invention is shown and discussed in one of the many pictures live circuits in the figure showing layout diagram.

Example. Exhaust gases, producing in 1 glass furnace, fired with natural gas, having a temperature above 1! 2J00 ° K drives partially to converter 2, in which methane reacts at temperatures above 55 ° C with steam water, lead to CH4 + H20 + conversion + q = 00 + 3H2, and partially to one of the regions 104 403 104 403 rieratorów 3, and then to the boiler trench 4 and only herds with a temperature of approx 400 ° iK to the atmosphere. At this time, furnace 1 energized there is a mixture of converter 2 and air to heated in the second regenerator 5. After certain period, the hot exhaust gases are directed from the furnace X to converter 2 and to regenerator 5 and then furnace 1 is supplied with air heated in regene ratorze 3. The amount of methane to water vapor is 16 parts by weight of methane to 18 parts by weight water vapor. 4> water LZGraf. Z-d No. 2 - H224 / 79 100 copies A-4 Price PLN 45

Claims (1)

1. Patent claim and a method of recovering waste heat in industrial furnaces, especially natural gas-fired furnaces, consisting in the use of the heat of flue gases for the endothermic reaction of methane-steam conversion, characterized by the mixture of methane and water vapor in the weight ratio CH4: H 2 O, most preferably 16:18, is heated to a temperature above 550 ° K by the heat of the gases leaving the furnace reaction chamber and the newly formed carbon monoxide and hydrogen gas mixture is fed to the furnace reaction chamber. air natural gas + *