Heat injection steam pipe insulation project


Heat injection steam pipe insulation engineering status quo
1. Traditional insulation structure is irrational, insulation thickness is not standardized, insulation construction is not in place.
2. Traditional insulation materials are easy to deform, settle, poor thermal stability, large damage rate, poor post-insulation effect, unable to meet the process and barbaric construction requirements.
3. The traditional insulation material life is short, basically only 3 to 5 years, all need to be replaced, raising the cost of all aspects of expenses.
4. Insulation effect of traditional insulation materials is poor and drops significantly, resulting in a substantial increase in the cost of insulation engineering maintenance, equipment operation and labor costs increase.
5. Traditional insulation materials generally not completely waterproof, easy to absorb water, moisture absorption led to easy corrosion pipes, thinning the pipe to bring security risks.

pipelineinsulation.jpg
Aerogel insulation compared with traditional insulation materials
 
1. Silica Aerogel insulation special three-dimensional space network structure and its waterproof, anti-pressure properties of its life can be up to 15 years, well above the life of traditional insulation materials.
2. The unique three-dimensional network structure of nano-space provides extraordinary high temperature stability, thermal insulation, thermal insulation and fire performance is constant and lasting.
3. Excellent thermal insulation performance, unique nano-scale network structure and holes can effectively prevent the heat transfer, is the world's lowest thermal conductivity of solid materials, only traditional insulation materials 1/3 to 1/5, Greatly reduces heat loss.
4. Has good flexibility and tensile strength, compressive strength, resistant to brutal construction outdoors, long-term use does not subsidence, no deformation. Avoid the traditional insulation materials in the long-term high temperature or vibration and deformation resulting from the accumulation and insulation properties of a sharp decline in the phenomenon.
5. With excellent overall hydrophobic properties, while allowing water vapor through, will not be due to water absorption, damp cause corrosion of pipes, to ensure that the insulation, insulation long-term effective, is the hot steam pipe, petrochemical pipe insulation materials best select.
6. Green energy saving, environmental protection, safe and reliable, can ensure employee health, avoid environmental pollution, improve equipment safety.
7. Lightweight and convenient, easy to construct, easy to install, save transportation, storage, construction and labor costs.

Thermal Calculation of Silica aerogel insulation blanket Steam Tube and Glass Felt Tube
1, the basic parameters
(1) The buried depth of the pipe is 1.5m, the temperature of soil in the buried depth is 10 ℃, and the thermal conductivity of soil is 1.7W / (m • k).
(2) the air thermal conductivity is 0.23 W / (m • k);
(3) The medium temperature is 300 ℃
(4) The thermal conductivity of Silica aerogel insulation mat is:
 
Silica aerogel Insulation structure diagram is as follows:
 

temperature（℃）

0

100

200

300

Thermal Conductivity（W/(m·k）

0.015

0.017

0.02

0.025

 

(5) Thermal conductivity of glass wool blanket:

 


temperature（℃）

0

100

200

300

Thermal Conductivity（W/(m·k）

0.025

0.048

0.071

0.094

 

2, Calculate the result

Insulation with glass wool blanket

pipe specifications (diameter × thickness)（mm）

out pipe specifications （diameter × thickness）（mm）

Insulation thickness（mm）

Air layer thickness（mm）

Surface temperature（℃）

Heat loss（W/m2）

426×7.0

820×9.0

140

48.0

49.0

71.7

 

Aerogel Insulation Blanket

pipe specifications (diameter × thickness)（mm）

out pipe specifications （diameter × thickness）（mm）

Insulation thickness（mm）

Air layer thickness（mm）

Surface temperature（℃）

Heat loss（W/m2）

426×7.0

630×8.0

48

46.0

47.4

79.8

Insulation structure diagram is as follows:

pipe aerogel issulation.jpg 

① anticorrosion coating ② outer steel tube ③ fiberglass tape ④ inorganic insulation (aerogel insulation blanket or aerogel blanket + rock wool) ⑤ sliding guide ⑥ work tube ⑦ air layer

pipelineinsulation1.jpg 

This type of pipeline is mainly targeted at 100 to 500 degrees of high temperature pipeline. At present, the insulation of such pipelines mostly has the problems of short service life of the insulation material, frequent maintenance and replacement, poor structural strength of traditional silicate insulation materials and prone to thinning on the bottom. Most traditional inorganic materials have no waterproof effect , Easily lead to corrosion of the pipeline, making the pipeline can not guarantee the design pressure requirements; pipeline due to the decline of thermal insulation, making the internal fluid in the end has been unable to meet the design temperature and pressure requirements.

The main reason for the above problems:

● traditional insulation material performance decay quickly

● poor insulation structure, the emergence of thin under the thick, making the pipeline prone to hot seam, resulting in serious heat loss

● Uneven insulation and high heat loss, resulting in lower pipe end temperature and pressure and lead to increased boiler load, increased operating costs

● The traditional insulation material has no waterproof effect, which makes the pipeline corrode seriously and easily bring huge security risks


Advantages of using Silica aerogel insulation materials:

● Relatively traditional insulation material airgel felts can greatly reduce the thickness of thermal insulation layer, reduce heat loss, and save energy.

● Silica Aerogel insulation material structure is good, high compressive strength, stable performance, long life cycle

● Silica aerogel insulation material has a good waterproof effect, to prevent corrosion to a maximum extent

● reduce the installation time and labor, easy to cut according to the complexity of the shape, curvature and space to cut the material and installation

● Aerogel insulation materials with less dosage, can reduce the amount of outer protective layer, reduce transportation and storage costs

● Aerogel used in combination with other traditional materials to provide a more economical thermal solution for users

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