CN87216988U

CN87216988U - Two-circuit indirectly-heating hot-blast stove using metal body and burnt coal

Info

Publication number: CN87216988U
Application number: CN 87216988
Authority: CN
Inventors: 李笑光; 何晓鹏; 陆卫
Original assignee: CHINA AGRICULTURAL ENG
Current assignee: CHINA AGRICULTURAL ENG
Priority date: 1987-12-30
Filing date: 1987-12-30
Publication date: 1988-10-12

Abstract

The utility model relates to a two-circuit indirectly-heating hot-blast stove using metal body and burnt coal which is a heating device for the drying of agricultural products and the heating of agriculture facilities. The utility model is composed of a sleeve-shaped two-circuit air heater which is sheathed on a vertical smoke pipe and a vertical furnace casing. The air arrives at hot spots and withdraws towards outside at the time of approaching the heating final temperature, which improves the firing effect. In addition, the two-circuit indirectly-heating hot-blast stove using metal body and burnt coal adopts the ventilation and the combustion supporting of the positive pressure of a small blower fan for cooking, and flue gase withdraws from the vertical smoke pipe welded on the upper part of the furnace, which cancells a special flue gas draught fan accordingly. The utility model has the advantages of simple structure, low cost, high thermal efficiency, no pollution, wide purpose and simple usage.

Description

Two-circuit indirectly-heating hot-blast stove using metal body and burnt coal

The utility model is a kind of heater that can be used for agricultural product drying and agricultural facility heating.

The coal-fired indirect hot-blast stove (being commonly called as the pipe free hot-blast stove) of at present more advanced non-shell and tube metallic object, though be enhanced than traditional shell and tube indirect hot-blast stove, but still exist the problem that some wait to solve: in stove, intersect by causing seal structure complex as flue and air channel, need special-purpose high temperature resistant smoke induced draught fan to increase equipment investment, be connected with air heating pipe in the burner hearth and be easy to burn, heated air did not make the combustion zone be subjected to cooling off largely with regard to arrival outer wall of combustion chamber position before reaching final heating-up temperature and causes burning to worsen the decline of after-flame degree to some extent.And because its cost is higher, even is close to or higher than the price of general agricultural facility, thus be difficult on some common agricultural facilities commonly used, apply, as medium and small agricultural dryer, greenhouse, hot house etc.

The purpose of this utility model is to be to provide a kind of simple in structure, and service life is longer, and the thermal efficiency is higher, and cost is low, the coal-fired two backhaul indirect hot-blast stoves of a kind of medium and small novel vertical barrel metallic object applied widely.

The combustion process of the coal-fired two backhaul indirect hot-blast stoves of metallic object is fuel to be thrown on the grate 1 by coal filling hole 11 burn in flue 9, combustion air is to be blasted with the bottom of little blower fan 12 from grate 1 by cooking, and the gas that burning produces is extracted out by smoke pipe 7 and chimney 6.Heated air is to enter in 3,8 interlayers from the air inlet 14 of overcoat 8 bottoms of two backhaul heaters earlier, and upwards through the top in cover 3 and flue 9 interlayers in entering behind annulus and the spray-hole, and then progressively just outwards extract out after the heating downwards by the ventilation blower that is configured on the agricultural facility at air outlet 2 near hot spots.Remaining slag is removed by shoot door 13 after burning.A narrow meshed fire sealing cover 5 also is housed in addition, so that bank up a fire when not using at short notice on the top of smoke pipe 7.

The utility model is that a cover is welded in the telescopic heater of two backhauls on vertical smoke pipe and the vertical barrel flue shell owing to air heater, so cost not only simple in structure is low, and heat utilization efficiency height (thermal efficiency is up to more than 60%).And because heated air is near the heating final temperature time, just arrive the outer wall place of flue hot spots and discharge, thereby the metallic object hot-blast stove that the cooling degree ratio that makes the furnace outer wall temperature of hot spots is used at present is low, so combustion efficiency and fuel burn-off rate increase, but also incendivity mountain bavin.In addition, also owing to adopt cooking combustion-supporting with little blower fan positive draft, flue gas is extracted out by the smoke pipe and the chimney that are welded on the flue, thereby has cancelled special-purpose high temperature resistant smoke induced draught fan, has further reduced cost.

The utility model is because air heating system and combustion exhaust gas system seal mutually, and the flow direction do not intersect mutually, need not encapsulant, so can provide and outdoor identical clean air.Hot blast temperature can be in 40～120 ℃ of scopes as required by with pipeline that ventilation blower on the facility connects on cold-air flap regulate and various coals of incendivity and Shan Chai etc.Therefore, purposes is very extensive, except that can being used for also can be used for the usefulness of greenhouse, hot house winter heating and other facility heating the various agricultural product dryings in a large number, and installing and uses all very convenient.Adopting the utility model is that the agricultural facility heating is less than 1/3rd of employing heating supply investment as its investments such as greenhouse, hot houses.After the utility model is implemented, will help agricultural to realize facilityization.

Accompanying drawing: the coal-fired two backhaul indirect hot-blast stove structural representations of metallic object

Embodiment of the present utility model as shown in drawings.The hot-blast stove main body by overlap 3 in smoke pipe 7, flue 9 heaters, heater jacket 8 is welded.Combustion system is by the grate 1 and the coal filling hole 11 that is welded on flue 9, interior cover 3, the overcoat 8 that are stuck on the flue 9, and shoot door 13 and the chimney 6 that is fixed by bolts on the smoke pipe 7 constitute.Heated air is entered by the air inlet 14 that is welded on overcoat 8 bottoms, and is discharged by the air outlet on cover 3 bottoms in being welded on 2.Combustion air is imported with little blower fan 12 by the cooking that is fixed by bolts on the shoot door 13.Fire sealing cover 5 usefulness stay bolts are fixed on the top of smoke pipe 7.Umbrella deduster 4 is welded on the top of flue 9, and fin 10 zigzag weld respectively is connected on flue 9 and the interior cover 3 of heater.Make material except that grate is cast iron, other is the A3 general steel plate.

It is that the large, medium and small type series of products of 4～400,000 kJ (kilojoule)s use for different occasions that the utility model can be made into caloric value.

Claims

1, a kind of coal-fired indirect hot-blast stove of being made by all-metal material is characterized in that:

A. air heater is made of cover 3 and overcoat 8 in one the two backhaul heating muff that is enclosed within on vertical smoke pipe 7 and the vertical barrel flue shell 9;

B. combustion air is to be blasted in the combustion chamber with little blower fan 12 malleations by a cooking that is arranged on the shoot door 13, and flue gas is to extract out by the smoke pipe 7 that setting is welded in flue 9 tops and heater sleeve 3 and 8;

C. heated air is to be entered in 3,8 interlayers and upwards through entering the top of 3,9 interlayers behind annulus and the spray-hole by the air inlet 14 that is arranged on two return air heater jackets, 8 bottoms, and then the furnace outer wall place that arrives hot spots downwards outwards discharges through exhaust outlet 2;

D. a fire sealing cover with holes 5 is arranged at the top of smoke pipe 7.