CN202791146U

CN202791146U - Carbon steel hot air pipeline with fireproofing material linings

Info

Publication number: CN202791146U
Application number: CN 201220397479
Authority: CN
Inventors: 苗海龙; 徐文升; 赵存宝
Original assignee: SHANDONG BAISIDA CHEMICAL CO Ltd
Current assignee: SHANDONG BAISIDA CHEMICAL CO Ltd
Priority date: 2012-08-10
Filing date: 2012-08-10
Publication date: 2013-03-13
Anticipated expiration: 2022-08-10

Abstract

The utility model discloses a carbon steel hot air pipeline with fireproofing material linings. An outer shell of the carbon steel hot air pipeline is a coil-molded steel plate, and three fireproofing material layers are arranged in the carbon steel hot air pipeline. The carbon steel hot air pipeline is obvious in energy-saving effect, long in service life, and low in maintenance cost.

Description

A kind of inner lining refractory carbon steel heat wind pipeline

Technical field

This practicality relates to a kind of inner lining refractory carbon steel heat airduct, is used for descending at the pipe temperature that production of carbon black reduces from air preheater to the reaction furnace hot air, belongs to production of carbon black utensil field.

Background technique

In carbon black process, the hot air duct from the air preheater to the reaction furnace generally adopts the SU304 stainless steel to make at present, and its disposable input is larger, and heat insulation effect is relatively poor, and the temperature drop from air preheater to the reaction furnace import is generally all about 150-200 ℃.The another kind of method that generally adopts is at metal shell liner cellucotton, builds refractory brick, this way overall structure poor stability, seal bad, easy local generation crack, difficulty of construction is large, occurs easily potential safety hazard in the practical application in industry.

As everyone knows, the relation that the use amount of the temperature of hot blast and fuel oil generally is inversely proportional in production of carbon black, namely to advance the temperature of reaction furnace higher for hot blast, and the fuel oil use amount is fewer, cost of production is lower, so a kind of hot air duct that can more effective maintenance hot blast temperature is badly in need of in related domain.

Summary of the invention

Needs for prior art, this practicality provides a kind of inner lining refractory carbon steel heat airduct, can effectively reduce the temperature difference that reduces in the production of carbon black from air preheater to the reaction furnace hot air, thereby reduced the consumption of fuel oil, and total adopts cast, overall structure is stable, good seal, and construction is simple.

For achieving the above object, this practicality is achieved through the following technical solutions:

A kind of inner lining refractory carbon steel heat wind pipeline, shell is for rolling steel plate, and inside is 3 layers of refractory masses.

When the above-mentioned pipeline of preparation, three layers of refractory masses are laid, built to the pipeline of innermost layer successively, then with refractory material and box hat integrated casting, get final product with connections such as rivet connection or welding.

In this practicality, described shell is that the Q235 steel plate rolls.

In this practicality, 3 layers of inner refractory masses, from shell inwardly (i.e. the pipeline to inside center from the steel plate of shell) be followed successively by first layer, the second layer, the 3rd layer, wherein first layer is that lightweight heat-proof is poured into a mould the bed of material; The second layer is the light weight castable refractory layer; The 3rd layer is corundum-mullite brick layer.

Wherein, described lightweight heat-proof cast bed of material density is 0.7g/cm3; Described light weight castable refractory layer density is 1.0g/cm3.

In this practicality, used the lightweight heat-proof cast bed of material, light weight castable refractory layer are well known to those skilled in the art, such as the common lightweight heat-proof cast bed of material perlite heat insulating casting material, vermiculite heat-insulating castable, silicious marl heat insulating casting material, light-weight brick sand heat insulating casting material, haydite heat insulating casting material etc. are arranged usually, these all commercially have ripe product widely to sell; Light weight castable refractory such as expanded perlite castable refractory, clay high-alumina refractory castable, float pearl and expanded perlite mixing castable refractory etc., is commercially also widely sold, and being art technology person can adopt.Wherein used corundum-mullite brick is a kind of high-temperature refractory that widely uses, and alumina content 75-90% wherein has numerous manufacturers all to produce this product.

Adopt the hot air duct of this utility structure; can effectively protect hot blast impact to tube wall in the process of circulation; and the hot blast that can make air preheater outlet about 30 ℃, effectively reduces the use amount of fuel oil to the reaction furnace import temperature difference, effectively reduces production costs.

The claimant contrasts discovery in actual use, and this practical hot air duct energy-saving effect is obvious, than not using this pipeline fuel oil to save about 15%-20%, effectively reduces user cost; And long service life, normal use can be used about 20 years; With respect to existing procucts, this product maintenance expense is low, does not substantially need to safeguard when normal the use.

Description of drawings

Fig. 1 is the sectional view of this utility pipes;

Fig. 2 is this utility pipes installment state schematic representation.

Embodiment

With reference to figure 1, the inner lining refractory carbon steel heat wind pipeline that this is practical, conduit enclosure is the steel plate 1 of thickness 10mm, the inside refractory material that haves three layers, first layer is the lightweight heat-proof cast bed of material 2 of density 0.7g/cm3, the second layer is 3, the three layers of employing of light weight castable refractory layer corundum-mullite brick layer 4 of density 1.0g/cm3.

With reference to figure 2, this practical warm-air pipe A is installed in air preheater B between the reaction furnace C and with the two connection, the claimant finds in experiment, with the air heating to 850 in the air preheater degree centigrade, when not adopting hot air duct of the present utility model, the air temperature of reaction furnace C is 650 degrees centigrade, and namely the temperature difference is 200 degrees centigrade; After adopting this novel hot air duct, the air temperature of reaction furnace C is 820 degrees centigrade, and namely the temperature difference is 30 degrees centigrade, this shows, this practical hot air duct can significantly reduce the temperature difference between air preheater and the reaction furnace, reduces the consumption of fuel oil.

Claims

1. an inner lining refractory carbon steel heat wind pipeline is characterized in that shell for rolling steel plate, and inside is 3 layers of refractory masses.

2. inner lining refractory carbon steel heat wind pipeline according to claim 1 is characterized in that described shell is that the Q235 steel plate rolls.

3. inner lining refractory carbon steel heat wind pipeline according to claim 1 is characterized in that 3 layers of inner refractory masses, inwardly is followed successively by first layer, the second layer, the 3rd layer from shell, and wherein first layer is the lightweight heat-proof cast bed of material; The second layer is the light weight castable refractory layer; The 3rd layer is corundum-mullite brick layer.

4. inner lining refractory carbon steel heat wind pipeline according to claim 3 is characterized in that described lightweight heat-proof cast bed of material density is 0.7g/cm ³

5. inner lining refractory carbon steel heat wind pipeline according to claim 3 is characterized in that described light weight castable refractory layer density is 1.0g/cm ³