CN2331856Y

CN2331856Y - Smoke heat exchanger

Info

Publication number: CN2331856Y
Application number: CN98224430U
Authority: CN
Inventors: 申若飞; 王卫东; 王卫红
Original assignee: 申若飞
Priority date: 1998-06-24
Filing date: 1998-06-24
Publication date: 1999-08-04
Anticipated expiration: 2008-06-24

Abstract

The utility model discloses a smoke heat exchanger, which is used for dust removal for industrial furnaces. The utility model comprise a low temperature smoke cavity, a high temperature smoke pipe and fins, wherein, high temperature smoke gas exhausted by a furnace carries out heat exchange with low temperature smoke gas exhausted by a dust remover in the low temperature cavity through the high temperature smoke pipe and the fins arranged on a channel pipe; then the smoke gas temperature on the exhausting point of a draught fan is higher than the dew point. Thereby, the utility model can eliminate dust junction on the draught fan and the air channel of the draught fan because the dust junction can corrode a blower and the air channel. The utility model has the advantage of long service life.

Description

Flue gas heat exchanger

The utility model relates to a kind of special equipment of Industrial Stoves smoke evacuation dedusting technology, specifically is kiln discharging flue gas heat exchanger.

The high-temperature flue gas of general industry kiln discharging enters deduster or directly enters wet scrubber through venturi, and through the water spray cooling, its temperature generally drops to below the flue gas dew point, by air-introduced machine discharging atmosphere.Because temperature is lower than dew point, contains SO ₂The gas dewfall, can condense in the impeller of blower fan, on casing and the wind path wall, corrosion blower fan and air channel thereof influences the service life of equipment, long-term knot gathers thicker grieshoch, directly influences the operational efficiency of dust removing effects and equipment.At present, adopted and a kind ofly protected blower fan with high-temperature flue gas by the low-temperature flue gas device that the air channel adds hot driving, but volume is big, erection space is placed restrictions on, and the heat exchange effect is bad, and day cold dewfall phenomenon that still occurs is difficult to obtain industrial applications.

The utility model can not be eliminated to overcome and discharge the flue gas dew point temperature, and provide a kind of discharging flue-gas temperature that can make to be higher than dew-point temperature above-mentioned the deficiencies in the prior art, prevents that the flue gas heat exchanger of bonding grieshoch from appearring in blower fan and air channel thereof.

The utility model realizes that the goal of the invention technical scheme is as follows:

This flue gas heat exchanger is arranged between Industrial Stoves fume emission mouth and the air-introduced machine, it includes the low temperature smoke chamber, high-temperature flue, fin, low temperature smoke chamber are equipped with upper inlet and outlet down, connect deduster exit and air-introduced machine respectively, one group of high-temperature flue passes in the inner chamber of low temperature smoke chamber, be tightly connected between them, the high-temperature flue wall in the low temperature smoke chamber is provided with some fins, and high-temperature flue is connected between kiln exhaust opening and the deduster import.

This flue gas heat exchanger has good protective action to air-introduced machine and discharging air channel thereof, and the high-temperature flue gas of kiln discharging enters wet scrubber through high-temperature flue, reduces temperature; high-temperature flue gas heat-shift in low temperature smoke chamber and high-temperature flue; improve temperature, avoid dewfall, eliminating can SO ₂Gas increases the service life to blower fan and air channel corrosion.

Below, describe technology contents of the present utility model in detail with embodiment with reference to the accompanying drawings.

Fig. 1 is the utility model topology view.

As shown in the figure: the one group of high temperature smoke pipe 7 that connects Industrial Stoves exhaust opening 1 and deduster import 3 places is by low temperature smoke chamber 6 inner chambers, high temperature smoke pipe 7 can be with many, present embodiment is 2, the outer wall of the high temperature smoke pipe 7 in its inner chamber is provided with some fins 5 of heat radiation, how many sheet numbers of this fin 5 can be according to the length setting of low temperature smoke chamber 6 sizes and high temperature smoke pipe 7, high-temperature flue gas enters behind the wet scrubber 2 from high temperature smoke pipe 7, the flue gas that its temperature reduces enters low temperature smoke chamber 6 from the import 4 of low temperature smoke chamber, carry out heat exchange by the tube wall of high temperature smoke pipe 7 and the high-temperature flue gas in fin 5 and the pipe, improved temperature, arrive more than the dewpoint, be discharged into atmosphere by air-introduced machine from the outlet 8 of low temperature smoke chamber 6.The discharging flue gas accounts for designing requirement more than the temperature at dew, is the size by the kiln gas discharge capacity, reaches low temperature smoke chamber 6 sizes, high temperature smoke pipe 7 numbers and size and fin 5 what and decide.

Claims

1, a kind of flue gas heat exchanger, it includes the low temperature smoke chamber, and high temperature smoke pipe and fin is characterized in that one group of high temperature smoke pipe (7) passes [inner chamber of low temperature smoke chamber (6), they are tightly connected, and on the tube wall of the high temperature smoke pipe (7) in low temperature smoke chamber (6) inner chamber some fins (5) are arranged.