CN208968300U - A kind of assembly of reduction furnace and its tail gas cooling structure - Google Patents

Abstract

The utility model discloses a kind of assembly of reduction furnace and its tail gas cooling structure, which includes: spool piece, which includes the exhaust inner tube being mutually arranged and a collet outer tube；Exhaust gas channel is formed in the exhaust internal tube；And cooling channels, it is formed between the exhaust inner tube and the collet outer tube；Wherein, which has a tube wall, and the tube wall is corrugated in the axial direction.The tube wall of the utility model exhaust inner tube is set as corrugated, or round tube is substituted using bellows or bellows tube, corrugated inner wall itself has retractility, can be used for compensating differences in expansion caused by the interior extension tube attached temperature difference, so that tail gas cooling structure does not need design expansion joint, simplify tail gas cooling structure.

Description

A kind of assembly of reduction furnace and its tail gas cooling structure

Technical field

The utility model designs the tail gas cooling structure of a kind of tail gas cooling structure, especially assembly of reduction furnace.

Background technique

Reaction temperature can reach 1200 DEG C in reduction furnace, and the exhaust temperature generated after reaction can reach spends more 700, usually It is cooled down using jacket structured with recirculated water, jacket structured increase expansion joint compensates swell increment difference, due to air slit diameter It is smaller, in addition expansion joint structure, so that exhaust pipe occupies biggish space in actual production.Exhaust pipe at equipment, Since heat exchange rate is lower, tail gas can not cool down rapidly, be affected to exhaust pipe.So exhaust pipe structure need to be improved, if Count a kind of cooling exhaust structure compact-sized, heat exchange efficiency is high.

Utility model content

It is existing to overcome the main purpose of the utility model is to provide a kind of assembly of reduction furnace and its tail gas cooling structure The defects of tail gas cooling structure is not compact enough in technology, and heat exchange efficiency is low, not easy to overhaul.

In order to achieve the above object, the utility model provides a kind of tail gas cooling structure, which includes:

Spool piece, the spool piece include the exhaust inner tube being mutually arranged and a collet outer tube；

Exhaust gas channel is formed in the exhaust internal tube；And

Cooling channels are formed between the exhaust inner tube and the collet outer tube；

Wherein, which has a tube wall, and the tube wall is corrugated in the axial direction.

Tail gas cooling structure described in the utility model, wherein the spool piece is equipped with one and blocks water breather valve, this blocks water Breather valve is two flanges, and the spool piece of the breather valve two sides that block water is respectively first exhaust casing and second exhaust casing, Two flange is separately connected the first exhaust casing and second exhaust casing.

Tail gas cooling structure described in the utility model, wherein the cooling channels of the first exhaust casing are communicated with First adapter tube, the cooling channels of the second exhaust casing are communicated with the second adapter tube, first adapter tube and second adapter tube point Not Tong Guo flange and a third adapter tube be connected to, third adapter tube is metal hose；The exhaust gas channel of the first exhaust casing with should The exhaust gas channel of second exhaust casing is connected to.

Tail gas cooling structure described in the utility model, wherein the first exhaust casing includes first exhaust inner tube and One collet outer tube, the second exhaust casing include second exhaust inner tube and the second collet outer tube, the tube wall of the first exhaust inner tube Corrugated, the cross-sectional diameter of the second exhaust inner tube is identical.

Tail gas cooling structure described in the utility model, wherein the tail gas cooling structure further includes limit plate, is set to this It is vented the outer wall of inner tube.

In order to achieve the above object, the utility model additionally provides a kind of assembly of reduction furnace, including furnace body and above-mentioned tail Air cooling structure, the tail gas cooling structure include:

Spool piece, the spool piece include the exhaust inner tube being mutually arranged and a collet outer tube；

Exhaust gas channel is formed in the exhaust internal tube；And

Cooling channels are formed between the exhaust inner tube and the collet outer tube；

Wherein, which has a tube wall, and the tube wall is corrugated in the axial direction.

The utility model has the beneficial effects that

1. the tube wall of the utility model exhaust inner tube is set as corrugated, or substitutes round tube using bellows or bellows tube, Corrugated inner wall itself has retractility, can be used for compensating differences in expansion caused by the interior extension tube attached temperature difference, so that tail gas is cooling Structure does not need design expansion joint, simplifies tail gas cooling structure.

2. the tube wall of the utility model exhaust inner tube is set as corrugated, changed under same specification compared to common round tube The thermal efficiency can be improved 2-4 times, and can be cooled to exhaust inner tube after high-temperature tail gas discharge rapidly allows at use temperature.Since heat exchange is imitated Rate is high, can reduce the length of exhaust pipe, saves space and cost.

3, at end face of flange, by connection by metal hose, compared with rigid connection, this structure can make flange close Cover has enough pretightning forces, guarantees sealing effect when cooling fluid pressure is higher in collet.

Detailed description of the invention

Fig. 1 is the utility model tail gas cooling structure schematic diagram.

Wherein, appended drawing reference:

1 spool piece

10 first exhaust casings

101 first exhaust inner tubes

102 first collet outer tubes

20 second exhaust casings

201 second exhaust inner tubes

202 second collet outer tubes

3 cooling channels

4 block water breather valve

5 first adapter tubes

6 second adapter tubes

7 thirds adapter tube

8 flanges

9 flanges

30 limit plates

Specific embodiment

Elaborate below to the embodiments of the present invention: the present embodiment before being with technical solutions of the utility model It puts and is implemented, give detailed embodiment and process, but the protection scope of the utility model is not limited to following realities Example is applied, in the following examples, the experimental methods for specific conditions are not specified, usually according to normal condition.

The utility model discloses a kind of tail gas cooling structure, which can be used for various generation high-temperature tail gas Device, be preferred for reduction furnace.Assembly of reduction furnace includes furnace body and the tail gas cooling structure for being connected to furnace body, the utility model The link position and connection type of furnace structure and exhaust gas cooling device and furnace body are not particularly limited.Referring to Fig. 1, figure 1 is the utility model tail gas cooling structure schematic diagram, which includes spool piece 1, exhaust gas channel 2 and cooling stream Body channel 3.

Specifically, spool piece 1 includes the exhaust inner tube being mutually arranged and collet outer tube, is vented inner tube and collet outer tube It is preferred that longitudinal center line having the same, but the utility model is not limited.The inside for being vented inner tube forms exhaust gas channel 2, The gap being vented between inner tube and collet outer tube forms cooling channels 3.

Further, spool piece 1 is equipped with the breather valve 4 that blocks water, and the breather valve 4 that blocks water can be made of two flanges, hinders Only cooling fluid passes through in two flange of cooling channels 3, but does not influence passage of the tail gas at this, and flange is set Count structure, it is ensured that exhaust cooling structure is easy for installation, meets pipe range required for equipment cooling simultaneously.Along spool piece 1 axial direction, the breather valve 4 that blocks water divide spool piece 1 for first exhaust casing 10 and second exhaust casing 20, composition resistance Two flanges of water breather valve 4 are separately connected first exhaust casing 10 and second exhaust casing 20.And first exhaust casing 10 wraps First exhaust inner tube 101 and the first collet outer tube 102 are included, second exhaust casing 20 includes second exhaust inner tube 201 and the second folder Cover outer tube 202.In one embodiment, first exhaust inner tube 101 is connected to reduction furnace furnace body, to receive the high temperature tail of furnace body discharge Gas, second exhaust inner tube 201 are equipped with offgas outlet, tail gas are conveyed into follow up device.The cooling of second exhaust casing 20 Fluid channel (channel i.e. by being formed between second exhaust inner tube 201 and the second collet outer tube 202) and cooling fluid supply fill Connection is set, to provide endlessly cooling fluid, the cooling channels of first exhaust casing 10 are (i.e. by first exhaust inner tube 101 and first channel that is formed between collet outer tube 102) on be provided with cooling fluid outlet, cooling fluid is exported into tail gas Cooling structure.

First collet outer tube 102 is connected with the first adapter tube 5, and the second collet outer tube 202 is connected with the second adapter tube 6, and first connects Pipe 5 and the second adapter tube 6 are connected to third adapter tube 7 respectively by flange 8 and 9.That is, the cooling channels of first exhaust casing 10 It is connected to the first adapter tube 5, the cooling channels of second exhaust casing 20 are connected to the second adapter tube 6, the first adapter tube 5 and second Adapter tube 6 is connected to by third adapter tube 7.Third adapter tube 7 is preferably metal hose, compared with rigid connection, the structure of metal hose Flange sealing surface can be made there are enough pretightning forces, guarantee sealing effect when hydraulic pressure is higher in collet.

It follows that tail gas can smoothly flow into second exhaust inner tube by the breather valve 4 that blocks water by first exhaust inner tube 101 201, but cooling fluid can only be passed through due to the obstruction for the breather valve 4 that blocks water by the cooling channels of second exhaust casing 20 Second adapter tube 6, third adapter tube 7 and the first adapter tube 5 flow into the cooling channels of first exhaust casing 10.

Wherein, exhaust inner tube has a tube wall, and the tube wall is corrugated in the axial direction, that is to say, that exhaust inner tube It can be metal bellows or metal bellows tube, undulatory exhaust inner tube itself has expansion compensation effect, for substituting Usually take over used by expansion joint, not only tail gas cooling structure can be made compact, save space, and with common metal pipe phase Than the heat exchange efficiency that can promote 2-4 times.

In the present invention, exhaust inner tube is that interval is divided into first exhaust inner tube 101 and second with the breather valve 4 that blocks water It is vented inner tube 201.In one embodiment, the tube wall of first exhaust inner tube 101 and second exhaust inner tube 201 is all corrugated； In another embodiment, first exhaust inner tube 101 is connected to reduction furnace furnace body, to receive the high-temperature tail gas of reduction furnace discharge, After tail gas enters first exhaust inner tube 101, temperature can not cool down rapidly, therefore first exhaust inner tube 101 and the first collet outer tube 102 differences in expansion is much higher than the differences in expansion of second exhaust inner tube 201 and the second collet outer tube 202, it is possible thereby to by first The tube wall of exhaust inner tube 101 is set as corrugated, and second exhaust inner tube 201 is common metal pipe, the i.e. cross of second exhaust inner tube 201 Diameter of section is identical.

In an embodiment of the utility model, limit plate 30, specifically, limit plate are additionally provided in cooling channels 3 30 are arranged on the outer wall of the exhaust inner tube, in an embodiment of the utility model, axis of the limit plate 30 in exhaust outer wall of inner tube Setting is spaced on direction, in another embodiment, limit plate 30 is arranged in 6 junction of second exhaust casing 20 and the second adapter tube And close to the position for the breather valve 4 that blocks water, so, it is ensured that cross-sectional area is uniform in exhaust inner tube circumferencial direction, so that cooling Effect is consistent.

In one embodiment, the utility model tail gas cooling structure application method is as follows:

First exhaust inner tube 101 is connected to reduction furnace furnace body, receives the high-temperature tail gas of furnace body discharge, high-temperature tail gas is along row The flowing of gas inner tube, by blocking water, breather valve 4 flows into second exhaust inner tube 201；On the cooling channels of second exhaust casing 20 Equipped with cooling fluid inlet, which is connected to coolant supply (not shown), and cooling fluid is from second exhaust casing 20 cooling channels pass sequentially through the second adapter tube 6, third adapter tube 7 and the first adapter tube 5, flow into the cold of first exhaust casing 10 But in fluid channel, to be cooled down to the high-temperature tail gas in first exhaust inner tube 101 and second exhaust inner tube 201.

After high-temperature tail gas enters first exhaust inner tube 101, exhaust temperature is reduced, and first exhaust inner tube temperature rises, cold But the cooling fluid in fluid channel 3 (for example being water) cools down tail gas, and exhaust inner tube is different with collet outer tube temperature, swollen Bulk is different, and exhaust inner tube swell increment is big, and collet outer tube swell increment is small, and exhaust inner tube uses metal bellows or metal bellows tube After (i.e. the tube wall of exhaust inner tube is corrugated), exhaust inner tube can inherently compensate swell increment difference, so this structure is not Need additional designs expansion joint.Moreover, under same specification, corrugated is vented inner tube heat exchange efficiency can compared to common round tube To improve 2-4 times, so that cooling system is more efficient.

Certainly, the utility model can also have other various embodiments, without departing substantially from the spirit of the present invention and its essence In the case of, those skilled in the art can make various corresponding changes and modifications, but these phases according to the utility model The change and modification answered all should belong to the protection scope of the utility model claims.

Claims (6)

1. a kind of tail gas cooling structure, which is characterized in that the tail gas cooling structure includes:

Spool piece, the spool piece include the exhaust inner tube being mutually arranged and a collet outer tube；

Exhaust gas channel is formed in the exhaust internal tube；And

Cooling channels are formed between the exhaust inner tube and the collet outer tube；

Wherein, which has a tube wall, and the tube wall is corrugated in the axial direction.

2. tail gas cooling structure according to claim 1, which is characterized in that the spool piece is equipped with one and blocks water ventilation Valve, which is two flanges, and the spool piece of the breather valve two sides that block water is respectively first exhaust casing and second Spool piece, two flange are separately connected the first exhaust casing and second exhaust casing.

3. tail gas cooling structure according to claim 2, which is characterized in that the cooling channels of the first exhaust casing Be communicated with the first adapter tube, the cooling channels of the second exhaust casing are communicated with the second adapter tube, this first adapter tube and this second Adapter tube is connected to by flange with third adapter tube respectively, and third adapter tube is metal hose；The tail gas of the first exhaust casing is logical Road is connected to the exhaust gas channel of the second exhaust casing.

4. tail gas cooling structure according to claim 2, which is characterized in that the first exhaust casing includes in first exhaust Pipe and the first collet outer tube, which includes second exhaust inner tube and the second collet outer tube, the first exhaust inner tube Tube wall it is corrugated, the cross-sectional diameter of the second exhaust inner tube is identical.

5. tail gas cooling structure according to claim 1, which is characterized in that the tail gas cooling structure further includes limit plate, It is set to the outer wall of the exhaust inner tube.

6. a kind of assembly of reduction furnace, including furnace body and tail gas cooling structure of any of claims 1-5, feature exist In the tail gas cooling structure includes:

Spool piece, the spool piece include the exhaust inner tube being mutually arranged and a collet outer tube；

Exhaust gas channel is formed in the exhaust internal tube；And

Cooling channels are formed between the exhaust inner tube and the collet outer tube；

Wherein, which has a tube wall, and the tube wall is corrugated in the axial direction.