CN201116734Y

CN201116734Y - Petrochemical industry device heating furnace dew point corrosion resisting composite lining

Info

Publication number: CN201116734Y
Application number: CNU2007200300139U
Authority: CN
Inventors: 席晓霞; 何智灵; 王春江; 王寿杰
Original assignee: Shandong Sunway Petrochemical Engineering Co Ltd
Current assignee: Shandong Sunway Petrochemical Engineering Co Ltd
Priority date: 2007-10-31
Filing date: 2007-10-31
Publication date: 2008-09-17
Anticipated expiration: 2017-10-31

Abstract

The utility model relates to a petrochemical unit heating-furnace dew point corrosion resistance composite lining, belonging to the chemical industry high temperature heating-furnace field, which comprises a heating-furnace lining layer. The technical key points lie in that the lining layer is a spray high aluminum fire-resistance fiber layer, a spray general aluminum fire-resistance fiber layer, a light-weight casting material layer and a spray high aluminum fire-resistance fiber layer in turn from the external side to the walls of the furnace, wherein the spray general aluminum fiber-resistance fiber layer is fixed on the light-weight casting material layer through a group of anchoring insulation pins, and the other ends of the anchoring insulation pins are buried in the spray high aluminum fire-resistance fiber layer. After improving the prior art, the composite lining has the advantages of great improvement of fire resistance in large amplitude, convenient construction and safe operation of devices in long term with largest guarantee, owing to small backfire lateral unit weight and excellent fire resistance.

Description

The petrochemical plant heating furnace compound lining of anti-the dew point corrosion

Technical field

The utility model belongs to chemical industry high-temperature heater field, specifically is a kind of petrochemical plant heating furnace compound lining of anti-the dew point corrosion.

Background technology

Heating furnace is one of petrochemical industry manufacturing enterprise equipment commonly used.The heating furnace radiation chamber lining material of prior art and structure have successively experienced the little brick structure of standard, full pouring material structure, fritter fire-retardent fiber felt-rug furnace lining structure, acupuncture volume blanket folding block structure, the complete fine spraying structure of making pottery.Described structure all in various degree existence deficiency: the 1. little brick structure of standard: owing to be subjected to the restriction of refractory material and level of processing, refractory brick can only be with common standard brick and smaller special form brick, it is many to build the back brickwork joint by laying bricks or stones, and the level of in addition building by laying bricks or stones is lower, and brickwork joint is big (national Specification is not more than 2mm), shape is also irregular, and the construction period time is long, and thermal conductivity factor is big, and unit weight is big, require furnace binding huger, ground is handled darker.2. full pouring material structure: thermal conductivity factor is big, and the lining desired thickness is thicker, and unit weight is big, requires furnace binding huger, and ground is handled darker, and the construction period time is long and need ramming, also needs baker, prolongs on-stream time.3. fritter fire-retardent fiber felt-rug furnace lining structure seam in whole furnace lining is a lot of, must " fissure of displacement " between each layer fire-retardent fiber felt-rug in the construction, and need adopt " splicing processes " construction in furnace wall corner.Furnace lining shrinks under the high-temperature flue gas environment, the slit occurs, causes the furnace body outer wall temperature too high.4. needle punched blanket folding piece easily produces in construction and leads directly to the slit, even seam occurs connecting, increases the radiation loss of furnace wall, the service life of shortening furnace lining, and the cost height.5. the complete fine spraying structure of making pottery is owing to sulfur-bearing in the fuel oil, and flue gas of heating furnace contains SO ₂, SO ₃Gas, under the operating mode of body of heater wall temperature≤80 ℃ (heating furnace that has for improving thermal efficiency of heating furnace, body of heater wall temperature≤60 ℃), flue gas very easily penetrates unsound refractory fiber lining and forms SO at furnace wall plate place ₂, SO ₃The dew point corrosion environment, cause the wallboard local corrosion to penetrate and emit flue gas, the corrosion fracture of bar for line Root Stress, refractory fiber lining large tracts of land to come off, install consequences such as unplanned shutdown, affects safety production.

The utility model content

The purpose of this utility model is to solve above-mentioned deficiency of the prior art, and prior art is improved, and provides a kind of for avoiding furnace wall plate and bar for line root to be subjected to SO ₂, SO ₃Dew point corrosion, counter-fire side employing unit weight is little, fire resistance is better, and the material of easy construction is to guarantee the petrochemical plant heating furnace compound lining of anti-dew point corrosion of equipment long period safe operation.

For achieving the above object, the utility model is achieved through the following technical solutions:

It is a kind of petrochemical plant heating furnace compound lining of anti-the dew point corrosion, comprise heating furnace backing layer body, the present technique main points are that the backing layer body is followed successively by spraying high-alumina refractory fiber layer, the general aluminium refractory fiber floor of spraying, lightweight and builds the bed of material from side, export-oriented furnace wall, spraying high-alumina refractory fiber layer, the general aluminium refractory fiber floor of spraying are fixed on lightweight by the anchoring bar for line more than 1 group and build on the bed of material, and the anchoring bar for line other end is embedded in the spraying high-alumina refractory fiber layer.

In order to improve the heat-insulating property of backing layer body, in building the bed of material, lightweight vertically buries the V-arrangement bar for line successively from top to bottom underground, this V-arrangement bar for line is positioned at the medium position that lightweight is built the bed of material, the V-arrangement bar for line just can absorb heat immediately like this, and build under the bed of material effect in lightweight, play certain insulation effect, reduce outwards distributing of heat.

In addition, for strengthening the heat absorption capacity of V-arrangement bar for line, the opening of V-arrangement bar for line heat-absorbent surface toward the outer side is with the absorption heat of maximum possible.

Described anchoring bar for line end is a Y shape structure.

The utility model is owing to adopted lightweight to build the compound of the bed of material and refractory fiber floor, make the backing layer body have both advantages on the whole, the overall performance that is the lightweight heat-proof cast bed of material is good, closely knit, heatproof, thermal shock resistance are good, unit weight is light, thermal conductivity factor is little, acid resistance corrodes, and the compressive resistance height of refractory fibrous material, permanent linear shrinkage is little, thermal conductivity factor is low, and the bar for line of refractory fibre furnace lining is embedded in the fiber lining fully, no any bar for line that exposes, thus the appearance of heating furnace outer wall " focus " avoided.Thereby avoided furnace wall plate and bar for line root to be subjected to SO ₂, SO ₃Dew point corrosion, unit weight is little, fire resistance is better because the counter-fire side adopts, and therefore have whole fire resistance and be largely increased, and easy construction, the advantage of the assurance equipment long period safe operation of maximum possible.

Description of drawings

Below in conjunction with accompanying drawing the utility model is described in further detail:

Fig. 1: the utility model structural representation.

The specific embodiment

As shown in Figure 1, this petrochemical plant heating furnace compound lining of anti-the dew point corrosion, comprise heating furnace backing layer body, the present technique main points are that the backing layer body is followed successively by spraying high-alumina refractory fiber layer 2, the general aluminium refractory fiber floor 3 of spraying, lightweight and builds the bed of material 1 from side, export-oriented furnace wall, spraying high-alumina refractory fiber layer 2, the general aluminium refractory fiber floor 3 of spraying are fixed on lightweight by the anchoring bar for line 5 more than 1 group and build on the bed of material 1, and anchoring bar for line 5 other ends are embedded in the spraying high-alumina refractory fiber layer 2, and the end of this anchoring bar for line 5 is a Y shape structure.

In order to improve the heat-insulating property of backing layer body, in building the bed of material 1, lightweight vertically buries V-arrangement bar for line 4 successively from top to bottom underground, this V-arrangement bar for line 4 is positioned at the medium position that lightweight is built the bed of material 1, V-arrangement bar for line 4 just can absorb heat immediately like this, and build under the bed of material 1 effect in lightweight, play certain insulation effect, reduce outwards distributing of heat.

In addition, for strengthening the heat absorption capacity of V-arrangement bar for line 4, the opening of V-arrangement bar for line 4 heat-absorbent surface toward the outer side is with the absorption heat of maximum possible.

The utility model is owing to adopted lightweight to build the compound of the bed of material 1 and refractory fiber floor 2,3, make the backing layer body have both advantages on the whole, the overall performance that is the lightweight heat-proof cast bed of material 1 is good, closely knit, heatproof, thermal shock resistance are good, unit weight is light, thermal conductivity factor is little, acid resistance corrodes, and the compressive resistance height of refractory fibrous material 2,3, permanent linear shrinkage is little, thermal conductivity factor is low, and the bar for line of refractory fibre furnace lining is embedded in the fiber lining fully, no any bar for line that exposes, thus the appearance of heating furnace outer wall " focus " avoided.Thereby avoided furnace wall plate and bar for line root to be subjected to SO ₂, SO ₃Dew point corrosion because counter-fire side unit weight is little, fire resistance is better, therefore the utlity model has whole fire resistance and is largely increased, and easy construction, the advantage of the assurance equipment long period safe operation of maximum possible.

Claims

1, a kind of petrochemical plant heating furnace compound lining of anti-the dew point corrosion, comprise heating furnace backing layer body, it is characterized in that the backing layer body is followed successively by spraying high-alumina refractory fiber layer, the general aluminium refractory fiber floor of spraying, lightweight and builds the bed of material from side, export-oriented furnace wall, spraying high-alumina refractory fiber layer, the general aluminium refractory fiber floor of spraying are fixed on lightweight by the anchoring bar for line more than 1 group and build on the bed of material, and the anchoring bar for line other end is embedded in the spraying high-alumina refractory fiber layer.

2, the petrochemical plant heating furnace compound lining of anti-dew point corrosion the according to claim 1 is characterized in that vertically burying the V-arrangement bar for line successively from top to bottom underground in lightweight is built the bed of material, and this V-arrangement bar for line is positioned at the medium position that lightweight is built the bed of material.

3, the petrochemical plant heating furnace compound lining of anti-dew point corrosion the according to claim 2, the opening that it is characterized in that the V-arrangement bar for line toward the outer side.

4, the petrochemical plant heating furnace compound lining of anti-dew point corrosion the according to claim 1, the end that it is characterized in that the anchoring bar for line is a Y shape structure.