CN2305615Y

CN2305615Y - Double channel smoke heating air preheater

Info

Publication number: CN2305615Y
Application number: CN 97221719
Authority: CN
Inventors: 李广海; 段守斌
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-07-12
Filing date: 1997-07-12
Publication date: 1999-01-27
Anticipated expiration: 2007-07-12

Abstract

The utility model relates to a double channel smoke heating air preheater for alkali recovery furnaces in paper manufacture industry. The utility model is composed of a smoke passage pipe and an air passage pipe. A partition plate is arranged between the two passage pipes, and heat pipes are installed in the two passages by penetrating through the partition plate. The utility model has the advantages of simple structure, small size, light weight, favorable heat transfer property, no dust deposition, and long service life.

Description

Two pass flue gas heating air preheater

The utility model relates to the two pass flue gas heating air preheater that alkali recovery furnace is used on a kind of paper industry.

At present, the flue gas heating air preheater that alkali recovery furnace uses is to be arranged in together by several air funnel spacing parallel arrangings, constitute heating unit (is the product of Wuhan Boiler Works of CN2050537U as patent publication No.), several heating units are together in series, form air preheater.This mechanism is because air is by entering down several air funnels from several air funnels, after air is through several like this heating units, the resistance that is subjected to is very big, not only can not satisfy the requirement of alkali recovery furnace to blast, and make the blower fan power consumption very high, and this volume is big, complex structure, weld seam is many, the problem of leaking out is difficult for solving, and has strengthened the rear portion cold end corrosion, and heat transfer coefficient is low, air funnel is horizontally disposed with, sode ash can produce accumulation on air funnel, increase flue resistance, has influenced the service life and the result of use of equipment greatly, the equipment consumptive material is many, and is uneconomical.

The purpose of this utility model is exactly needs that use at above-mentioned situation with in conjunction with alkali recovery furnace and the two pass flue gas heating air preheater of using on a kind of novel alkali recovery furnace is provided.

The purpose of this utility model is achieved like this, and adds dividing plate between two, constitutes bitubular binary channels, passes dividing plate and adorn a plurality of super heat-conductive pipes in the bitubular.

The utility model is simple in structure, and is easy to install, and cost is low, easily produce, and the heat transfer efficiency height, dust stratification not, the life-span is long, and economic and social benefit is remarkable.

Below in conjunction with accompanying drawing structure of the present utility model is elaborated.

Fig. 1 is a structural profile front view of the present utility model.

Fig. 2 is a vertical view of the present utility model.

Fig. 3 is a left side of the present utility model (right side) view.

Provided by Fig. 1, the utility model is to be made of exhaust gases passes pipe 2, air duct 1, dividing plate 3, heat pipe 4, and 1 of exhaust gases passes pipe 2 and air duct are equipped with dividing plate 3, constitutes flue gas and air binary channels, and passing dividing plate 3 angle mount in two passages has heat pipe 4.For the needs of installing, the mouth of air duct 1 can be in the side (being non-straight tubular) sometimes.Heat pipe 4 adopts commercially available super heat-conductive pipe.

In use, the utility model is contained on the alkali recovery furnace high-temperature flue, when high-temperature flue gas enters from left end in the exhaust gases passes pipe 2, when superheater tube 4 districts, heat transferred heat pipe 4 bottoms, discharge preheater from right-hand member, and air enters from the air duct 1 of right-hand member, when flowing through heat pipe 4 districts, obtains heat from the upper end of heat pipe 4, discharge from left end, thereby finish exchange heat.Be noted that the utility model especially when installing and using, heat pipe will keep vertical with horizontal direction, to eliminate the accumulation of sode ash on heat pipe.

From the above, when the high-temperature flue gas that comes out from alkali recovery furnace flows through exhaust gases passes the built-in super heat-conductive pipe of heat transferred, the other end of super heat-conductive pipe is in air duct, when air flows through air duct, obtain the heat that heat pipe passes over, thereby improved temperature, reach the preheating purpose, and because two passages are straight-through separately, the air current flow resistance is little, the heat transfer efficiency height, the preheater volume is little, in light weight, cost is low, economy and durability, and the easy problem of leaking out that solves, since simple in structure, be easy to make and give birth to, have bright popularizing application prospect.

Claims

1, a kind of two pass flue gas heating air preheater, be to constitute by exhaust gases passes pipe and air duct, it is characterized in that between exhaust gases passes pipe (2) and air duct (1) dividing plate (3) being housed, constitute flue gas and air binary channels, pass dividing plate (3) heat pipe (4) is housed in two passages.

2, two pass flue gas heating air preheater according to claim 1 is characterized in that said heat pipe (4) is a super heat-conductive pipe.

3, two pass flue gas heating air preheater according to claim 1 is characterized in that said heat pipe is to pass dividing plate (3) angle mount in two passages.