Coal-fired water heating furnace

Abstract

A coal-fired water heater disclosed by the invention is designed to meet the requirements of environmental protection and facilitate the use of users. The ash removal grate composed of trays and moving rows is used under the furnace. Air intake plates are installed at the front and rear of the bottom of the furnace. The high-temperature gas heats the water exchange jacket and then discharges it through the reentrant flue to reduce dust and absorb heat. The front and rear walls of the furnace, the front and rear walls of the flue, the partition wall of the reentrant flue, and the water exchange jacket are connected with the interlayer water jackets on both sides to form an internal space. The combined heat exchange device with the cavities connected to each other can control the combustion and temperature of the furnace by adjusting the temperature regulating damper and opening and closing the furnace air inlet. There is an interlocking device between the coal filling port and the furnace door to prevent smoke from overflowing. The coal-fired water heater has a large amount of coal at one time and a long burning time. Bituminous coal, briquette, anthracite and other coal types can be used. The emission of air pollutants is low and the thermal efficiency is high. It can provide users with heating and domestic hot water.

Description

technical field [0001] The invention belongs to a coal-fired water heating furnace, in particular to a coal-fired water heating furnace meeting the requirements of environmental protection. Background technique [0002] The 195th to 196th pages in the book "Brite Coal and Energy-saving Stoves" published by Popular Science Press in September, 1994 introduced a kind of closed heating stove. Passing through the coal seam against the direction of flame burning, the volatile substances released in the coal seam lead to the flue, and are heated and drawn when passing through the "throat" at the back of the furnace. In order to ensure full combustion, the secondary air is introduced from the small holes of the hollow bricks, and mixed with volatile substances at the "throat", and burned in the secondary combustion chamber. The secondary combustion chamber is located at the rear and lower part of the fuel layer. It is made of heat-insulating refractory bricks, and a chimney is set ...

AI Technical Summary

Problems solved by technology

But this furnace also has some points that can be improved: the coal storage space in the upper part of the furnace is small, and a small amount of fuel must be added frequently during use; the geometry of the secondary combustion chamber section is too simple, and the secondary air only flows from the secondary combustion chamber. The upper part of the inlet is introduced, which affects the combustion effect; after the gas is heated by the boiler, it is directly discharged from the chimney through the flue outlet, not only the smoke and dust in the gas are easily discharged into the atmosphere, but also the boiler does not absorb heat sufficiently, resulting in part of the heat loss; the combustion and temperature The control can be further improved

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