Bottom bonding material used in preservative treatment of chimney and flue

A bonding material and anti-corrosion treatment technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of high-temperature smoke at 180°C, large thermal expansion and contraction of the lining, and negative pressure resistance Poor and other problems, to achieve the effect of easy control of the quality process, low load requirements, and good erosion resistance

Active Publication Date: 2009-12-16
重庆大众防腐股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large thermal expansion and contraction of this type of lining, easy deformation, and poor negative pressure resistance, it cannot be used at all under the working conditions of 180°C high-temperature flue gas in the chimney and flue, and the existence of alternating cold and heat and long-term negative pressure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] 1. Preparation of modified silicone rubber M50:

[0061] In a 100L vacuum mixer, first add 100kg room temperature vulcanized silicone rubber and 3kg nano-SiO x and 3kg of white carbon black, stirred for 1 hour with the best 300-400 rpm speed; then add 2kg of TiO in proportion 2 Afterwards, vacuumize, and stir for 2 hours at a speed of 400-500 rpm under the condition that the vacuum degree is controlled at -0.5 to -0.01MPa, and the M50 finished product is obtained after passing the inspection;

[0062] 2. Preparation of surface modified polytetrafluoroethylene DS1:

[0063] First, the PTFE film is roughened on 120# and 220# oil stones in turn, and the surface roughness is Ra=2.5-5 microns, Rz=10-20 microns;

[0064] Then wash in acetone or ethanol, dry at 78-83°C, and then perform sodium-naphthalene chemical treatment for 20-30 minutes;

[0065] The preparation process of sodium-naphthalene chemical treatment liquid is as follows: In the reaction kettle equipped with ...

Embodiment 2

[0070] In this example, only the specific formulations of the modified silicone rubber M50, the surface-modified polytetrafluoroethylene DS1 and the sodium-naphthalene chemical treatment solution are different, and the rest of the preparation, treatment and construction methods are the same.

[0071] 1. Modified silicone rubber M50

[0072] In a 100L vacuum mixer, first add 100kg room temperature vulcanized silicone rubber and 2kg nano-SiO x and 4kg white carbon black, stir for 1 hour with the best 300-400 rpm speed; then add 2kg of TiO in proportion 2 Afterwards, vacuumize, and stir for 2 hours at a speed of 400-500 rpm under the condition that the vacuum degree is controlled at -0.5 to -0.01MPa, and the M50 finished product is obtained after passing the inspection;

[0073] 2. Surface modified polytetrafluoroethylene DS1

[0074] First, the PTFE film is roughened on 120# and 220# oil stones in turn, and the surface roughness is Ra=2.5-4 microns, Rz=10-15 microns;

[0075]...

Embodiment 3

[0081] In this example, only the specific formulations of the modified silicone rubber M50, the surface-modified polytetrafluoroethylene DS1 and the sodium-naphthalene chemical treatment solution are different, and the rest of the preparation, treatment and construction methods are the same.

[0082] Modified silicone rubber M50

[0083] In a 100L vacuum mixer, first add 100kg room temperature vulcanized silicone rubber and 2kg nano-SiO x and 6kg of white carbon black, stir for 1 hour with the best 300-400 rpm; then add 1kg of TiO in proportion 2 Finally, vacuumize, and stir for 2 hours at a speed of 450-550 rpm under the condition that the vacuum degree is controlled at -0.5 to -0.01MPa, and the M50 finished product is obtained after passing the inspection;

[0084] Surface modified PTFE DS1

[0085] First, the PTFE film is roughened on 120# and 220# oil stones in turn, the surface roughness is Ra=3-6 microns, Rz=15-20 microns;

[0086] Then wash in acetone or ethanol, dry...

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Abstract

The invention relates to a bottom bonding material used in preservative treatment of a chimney and a flue. The bottom bonding material is modified silicon rubber (M50), and surface modified polytetrafluoroethylene (DS1) of a surface preservative material is bonded to the inner walls of the chimney and the flue; the modified silicon rubber (M50) is formed by modifying room-temperature vulcanized silicon rubber through nano SiOx and TiO2 additives, and the weight ratio of the room-temperature vulcanized silicon rubber to the nano SiOx to the TiO2 is 100:2-6:1-3; and x in the nano SiOx is 1.2 to 1.6. The bottom bonding material can provide effective bonding for DS1 (surface modified polytetrafluoroethylene board) with temperature resistance and strong corrosion resistance in the preservative treatment of the chimney and the flue so that an integral preservative layer has good temperature resistance, strong adhesive force, super-strong acid resistance, good thermal shock resistance, good weather resistance, strong permeability resistance, strong pollution resistance and good scouring resistance.

Description

technical field [0001] The invention relates to a bonding material for a high-temperature-resistant and anti-corrosion inner lining material, which is mainly used in the anti-corrosion of chimneys and flues in thermal power plants after desulfurization, and belongs to the field of organic polymer materials. Background technique [0002] At present, there are gaps or insufficient experience in anti-corrosion measures for chimneys after desulfurization, whether in terms of chimney design, construction and other standard specifications, or in practical engineering applications. Due to investment and technical problems, the five major power plants in my country Led by the group, since the second half of 2006, 80% of the start-up projects of various power generation companies have adopted the removal of GGH (flue gas heat exchange device). However, when the FGD unit is out of operation, the temperature of the direct discharge reaches over 130°C, so the chimney must be treated with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J11/04
Inventor 唐健
Owner 重庆大众防腐股份有限公司
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