阅读说明：本技术 一种用于脱硫用斜弯头的下沉直管及其制备方法 (Sinking straight pipe of inclined elbow for desulfurization and preparation method thereof ) 是由 李民 吕海刚 肖其浩 于 2019-11-25 设计创作，主要内容包括：本发明公开了一种用于脱硫用斜弯头的下沉直管,其原料按重量份包括：双酚A环氧乙烯基树脂20-40,酚醛树脂18-27,聚酰亚胺树脂4-12,复合纤维50-70,耐热纳米颗粒1-2,固化剂1-2,固化促进剂0.1-0.2,抗氧剂264 0.5-1,助抗氧剂DLTP 0.1-0.5,脱模剂1-2,偶联剂1-2,防脆化剂1-2,色素1-2。本发明公开了上述下沉直管制备方法,将复合纤维、耐热纳米颗粒混合,加入乙醇水溶液,超声分散,喷雾干燥得到预处理纤维料；将双酚A环氧乙烯基树脂、酚醛树脂、聚酰亚胺树脂、抗氧剂、脱模剂、偶联剂、防脆化剂混合,然后加入预处理纤维料、固化剂、色素搅拌,注射入模具,固化。(The invention discloses a sinking straight pipe of an inclined elbow for desulfurization, which comprises the following raw materials in parts by weight: 20-40 parts of bisphenol A epoxy vinyl resin, 18-27 parts of phenolic resin, 4-12 parts of polyimide resin, 50-70 parts of composite fiber, 1-2 parts of heat-resistant nano particles, 1-2 parts of curing agent, 0.1-0.2 part of curing accelerator, 2640.5-1 part of antioxidant, 0.1-0.5 part of auxiliary antioxidant DLTP, 1-2 parts of release agent, 1-2 parts of coupling agent, 1-2 parts of anti-embrittlement agent and 1-2 parts of pigment. The invention discloses a preparation method of the sinking straight pipe, which comprises the steps of mixing composite fibers and heat-resistant nano particles, adding an ethanol water solution, carrying out ultrasonic dispersion, and carrying out spray drying to obtain a pretreated fiber material; mixing bisphenol A epoxy vinyl resin, phenolic resin, polyimide resin, an antioxidant, a release agent, a coupling agent and an anti-embrittlement agent, then adding the pretreated fiber material, the curing agent and the pigment, stirring, injecting into a mold, and curing.)

1. A sinking straight pipe for a desulphurization inclined elbow is characterized by comprising the following raw materials in parts by weight: 20-40 parts of bisphenol A epoxy vinyl resin, 18-27 parts of phenolic resin, 4-12 parts of polyimide resin, 50-70 parts of composite fiber, 1-2 parts of heat-resistant nano particles, 1-2 parts of curing agent, 0.1-0.2 part of curing accelerator, 2640.5-1 part of antioxidant, 0.1-0.5 part of auxiliary antioxidant DLTP, 1-2 parts of release agent, 1-2 parts of coupling agent, 1-2 parts of anti-embrittlement agent and 1-2 parts of pigment.

2. The dip pipe for a sloping elbow for desulfurization as claimed in claim 1, wherein the composite fiber comprises by mass: 4-8% of polyester fiber, 6-10% of basalt short fiber, 2-6% of carbon fiber and the balance of glass fiber.

3. The dip pipe for a piping elbow for desulfurization according to claim 2, wherein the diameter of the glass fiber is 20 to 40 μm, and the length distribution of the glass fiber is as follows: 40-50wt% of glass fiber with the length of 0.12-0.18mm, 12-20wt% of glass fiber with the length of 0.22-0.26mm, and the balance of glass fiber with the length of 0.3-0.35 mm.

4. The dip pipe for a piping elbow for desulfurization as claimed in claim 1, wherein the curing agent is hexamethylenetetramine and the curing accelerator is calcium oxide.

5. The dip pipe for a piping elbow for desulfurization according to claim 1, wherein the release agent is zinc stearate.

6. The dip pipe for a piping elbow for desulfurization as recited in claim 1, wherein the coupling agent is aminopropyltriethoxysilane.

7. The dip pipe for a slanted elbow for desulfurization as claimed in claim 1, wherein the heat-resistant nanoparticles are prepared by the following process: adding chitosan into acetic acid water solution, mixing, adding nanometer attapulgite and nanometer silicon dioxide, performing ultrasonic treatment at 60-80 deg.C for 1-2h, filtering, and spray drying to obtain heat-resistant nanoparticles.

8. The dip pipe for the oblique elbow for desulfurization as recited in claim 7, wherein in the process for preparing the heat-resistant nanoparticles, the mass ratio of chitosan, the aqueous solution of acetic acid, the nano-attapulgite and the nano-silica is 1-3: 50-60: 2-8: 4-10 percent, wherein the mass fraction of the acetic acid aqueous solution is 10-20 percent.

9. A method for preparing a sinking straight pipe for a slanted elbow for desulfurization according to any one of claims 1 to 8, comprising the steps of:

(1) uniformly mixing the composite fibers and the heat-resistant nanoparticles, adding an ethanol water solution, fully stirring, performing ultrasonic dispersion, and performing spray drying to obtain a pretreated fiber material;

(2) mixing bisphenol A epoxy vinyl resin, phenolic resin, polyimide resin, antioxidant 264, antioxidant DLTP, release agent, coupling agent and anti-embrittlement agent, adding pretreated fiber material, curing agent, curing accelerator and pigment, continuously stirring, pressurizing and injecting into a mold, and curing to obtain the sinking straight pipe of the inclined elbow for desulfurization.

Technical Field

The invention relates to the technical field of glass fiber reinforced plastics, in particular to a sinking straight pipe of an inclined elbow for desulfurization and a preparation method thereof.

Background

Glass Fiber Reinforced Plastic (GFRP) is a fiber reinforced plastic, which is a reinforced plastic made of unsaturated polyester, epoxy resin and phenolic resin matrix reinforced by glass fiber, glass fiber or its product as reinforcing material, and is called glass Fiber Reinforced Plastic (FRP), or glass Fiber Reinforced Plastic (FRP), which is different from toughened glass.

The glass fiber reinforced plastic is one of composite materials, and has been widely applied in related industries such as a power plant desulfurizing tower and the like due to unique performance advantages and is well praised; in a desulfurizing tower of a power plant, lime water reacts with sulfur and sulfur dioxide in high-temperature waste gas to be discharged and prevented from emptying, the equipment of the process is mainly characterized in that a plurality of layers of lime water pipelines supported by a support frame are arranged in a desulfurizing tower body, branch pipes are connected to the lime water pipelines, and a lime water spray head is arranged on each branch pipe or each lime water pipeline; when the device works, the lime water is sprayed out from the spray head to react with sulfur and sulfur dioxide in the high-temperature waste gas. At present, in a desulfurization absorption tower, a sinking straight pipe of an inclined elbow is different from a traditional material product, the sinking straight pipe has extremely high requirement on the bending strength, and in addition, the sinking straight pipe has extremely high requirement on the heat resistance of the inner wall of a pipeline and needs to be maintained and replaced frequently, so that the normal work of a power plant can be seriously influenced.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a sinking straight pipe of an inclined elbow for desulfurization and a preparation method thereof.

A sinking straight pipe for a desulphurization inclined elbow comprises the following raw materials in parts by weight: 20-40 parts of bisphenol A epoxy vinyl resin, 18-27 parts of phenolic resin, 4-12 parts of polyimide resin, 50-70 parts of composite fiber, 1-2 parts of heat-resistant nano particles, 1-2 parts of curing agent, 0.1-0.2 part of curing accelerator, 2640.5-1 part of antioxidant, 0.1-0.5 part of auxiliary antioxidant DLTP, 1-2 parts of release agent, 1-2 parts of coupling agent, 1-2 parts of anti-embrittlement agent and 1-2 parts of pigment.

Preferably, the composite fiber comprises, in mass percent: 4-8% of polyester fiber, 6-10% of basalt short fiber, 2-6% of carbon fiber and the balance of glass fiber.

Preferably, the diameter of the glass fibers is 20 to 40 μm, and the length distribution of the glass fibers is as follows: 40-50wt% of glass fiber with the length of 0.12-0.18mm, 12-20wt% of glass fiber with the length of 0.22-0.26mm, and the balance of glass fiber with the length of 0.3-0.35 mm.

Preferably, the curing agent is hexamethylenetetramine and the curing accelerator is calcium oxide.

Preferably, the release agent is zinc stearate.

Preferably, the coupling agent is aminopropyltriethoxysilane.

Preferably, the heat-resistant nanoparticles are prepared by the following process: adding chitosan into acetic acid water solution, mixing, adding nanometer attapulgite and nanometer silicon dioxide, performing ultrasonic treatment at 60-80 deg.C for 1-2h, filtering, and spray drying to obtain heat-resistant nanoparticles.

Preferably, in the preparation process of the heat-resistant nanoparticles, the mass ratio of chitosan to acetic acid aqueous solution to nano-attapulgite to nano-silica is 1-3: 50-60: 2-8: 4-10 percent, wherein the mass fraction of the acetic acid aqueous solution is 10-20 percent.

The preparation method of the sinking straight pipe of the inclined elbow for desulfurization comprises the following steps:

(1) uniformly mixing the composite fibers and the heat-resistant nanoparticles, adding an ethanol water solution, fully stirring, performing ultrasonic dispersion, and performing spray drying to obtain a pretreated fiber material;

(2) mixing bisphenol A epoxy vinyl resin, phenolic resin, polyimide resin, antioxidant 264, antioxidant DLTP, release agent, coupling agent and anti-embrittlement agent, adding pretreated fiber material, curing agent, curing accelerator and pigment, continuously stirring, pressurizing and injecting into a mold, and curing to obtain the sinking straight pipe of the inclined elbow for desulfurization.

The technical effects of the invention are as follows:

(1) according to the invention, nano-attapulgite and nano-silica are compounded, uniformly loaded and adsorbed in a three-dimensional porous structure of chitosan, and then amino groups on a molecular chain of the chitosan interact with active groups on a coupling agent, so that the nano-silica is firmly combined with bisphenol A epoxy vinyl resin, on one hand, the compatibility of heat-resistant nano particles and other organic macromolecules is remarkably improved, and on the other hand, the nano-silica is uniformly dispersed in glass fibers.

(2) The invention adopts the combination of bisphenol A epoxy vinyl resin, phenolic resin and polyimide resin as base materials, the compatibility of the bisphenol A epoxy vinyl resin, the phenolic resin and the polyimide resin is good, the compatibility of the bisphenol A epoxy vinyl resin, the phenolic resin and the polyimide resin is reasonable, the heat resistance, the corrosion resistance and the aging resistance of the sinking straight pipe can be effectively enhanced, the composite fiber is added as a reinforcing material, and the heat-resistant nano particles are added and dispersed in the reinforcing material, so that the compatibility between the reinforcing material and the base materials can be effectively improved, and the bending strength, the high temperature resistance and.

(3) The service life of the sinking straight pipe for the inclined elbow for desulfurization can reach more than 50 years through detection, the sinking straight pipe does not need to be replaced in the using process and can ensure the normal operation of a desulfurization device, the sinking straight pipe can not deform for 10 hours at the environment temperature of 210 plus 230 ℃, and the sinking straight pipe has the characteristic of high temperature resistance and can meet the performance requirement of a desulfurization tower of a power plant.

Detailed Description

The technical solution of the present invention will be described in detail below with reference to specific examples.