CN105013434B - Transformer deterioration oil adsorbent and preparation method thereof - Google Patents

Abstract

The invention discloses an adsorbent for degraded transformer oil and a preparation method thereof, which belongs to the field of solid adsorbent composition or filter aid composition and is used to solve the problems that the existing adsorbent is unsafe and pollutes the environment. The degraded transformer oil adsorbent of the present invention comprises the following effective components in parts by weight: 30-40 parts of alumina, 20-40 parts of sodium silicate, and 20-30 parts of aluminum chloride. The adsorbent prepared by the present invention is an inorganic component, non-toxic, non-flammable, and will not cause dangers such as explosions in the process of waste oil treatment; and the preparation method of the adsorbent used is simple, low in cost, and has no environmental pollution; Large specific surface area, good adsorption and purification effect.

Description

Transformer deterioration oil adsorbent and preparation method thereof

technical field

The invention belongs to the field of solid adsorbent composition or filter aid composition, and in particular relates to a transformer deteriorated oil adsorbent and a preparation method thereof.

Background technique

During the operation of the transformer, the transformer oil will be oxidized due to foreign matter pollution or the influence of high temperature, electromagnetic field, metal catalysis, etc. during the operation, and then the impurities in the oil will increase, the oil will be turbid, and finally become deteriorated waste oil. The more common treatment methods in the prior art are to use H ₂ SO ₄ -clay clay method, acid-alkali-clay clay method to adsorb transformer oil, but there are mainly the following defects: liquid chemical materials such as acid and alkali are used in the treatment process, There are potential safety hazards for operators, and some acid residues and alkali residues will be generated, which cannot be processed and utilized, causing greater pressure on the environment.

Contents of the invention

In order to solve the above problems, the present invention provides a relatively safe adsorbent for degraded transformer oil with good adsorption effect and a preparation method thereof.

The transformer deteriorated oil adsorbent of the present invention comprises the following effective components in parts by weight: 30-40 parts of alumina, 20-40 parts of sodium silicate, and 20-30 parts of aluminum chloride.

Preferably, the adsorbent contains the following effective components in parts by weight: 30-35 parts of aluminum oxide, 30-35 parts of sodium silicate, and 25-30 parts of aluminum chloride.

Further, another object of the present invention is to provide the preparation method of the degraded transformer oil adsorbent, comprising the following steps:

(1) Aluminum oxide, sodium silicate, aluminum chloride and sulfuric acid are mixed uniformly; the mass fraction of sulfuric acid used is 25-40%;

(2) the mixture obtained in (1) is made into particles with a particle diameter of 2-3mm by a molding machine;

(3) Place the granules obtained in step (2) in an oven and bake at 70°C for 2 hours; then quickly raise the temperature to 700°C and dry for 1 hour to obtain the finished dry granules.

The adsorbent of the present invention can be made into a finished product of particulate matter, and the finished product can be directly put into the transformer oil through the natural precipitation of the particulate matter, and then impurities such as oxidized substances in the transformer oil can be taken away, or it can be made according to the following method Adsorption filter plate: The adsorption filter plate includes filter plate I placed on the upper layer and filter plate II placed on the lower layer; the filter plate I has a pore size of 200-250um, and the filter plate II has a pore size of 160-190um; the filter plate II is evenly placed For the finished particulate matter produced in step (3), filter paper or filter cloth is arranged above the finished particulate matter. At the same time, in order to increase the filtering effect, the finished particulate matter obtained in step (3) can also be placed on the top of the filter plate I, or multiple layers of filter plates identical to the filter plate II can be arranged.

When the filter plate is used to realize the function of filtration and adsorption, the upper filter plate has a larger pore size, which can keep the insoluble matter in the transformer oil on the filter plate I, thereby reducing the filtration and adsorption pressure of the filter plate II. Multi-layer filter plates are used Filter adsorption can better absorb impurities in transformer oil and obtain better quality filter oil.

Compared with prior art, the beneficial effect of the present invention is:

(1) The adsorbent of the present invention is an inorganic component, non-toxic, non-flammable, and will not cause dangers such as explosions in the waste oil treatment process; and the adsorbent used and its preparation method have low cost and no environmental pollution ;

(2) The adsorbent particles prepared by the present invention have a larger specific surface area, and aluminum chloride itself can be used as a refining agent, and can also be used as a carrier to attach alumina and sodium silicate powder to its surface to form particles. Under the action of , it can form particles with larger specific surface area, which can improve the adsorption effect;

(3) Alumina, which contains a rigid skeleton structure formed by hydroxide crystals, can decolorize and adsorb transformer oil and restore the original color of transformer oil; sodium silicate is a three-dimensional skeleton-like compound composed of silicon-oxygen and aluminum-oxygen tetrahedrons , can adsorb impurities in transformer oil, and the specific surface area of the compound with a skeleton structure is large, and the adsorption effect is better.

Description of drawings

Fig. 1 is the structural representation of filter plate described in embodiment 2 of the present invention;

Among them: 1-filter plate I; 2-filter plate II; 3-adsorbent particles.

detailed description

The present invention will be further explained below in conjunction with the accompanying drawings and embodiments.

Example 1

An adsorbent for degraded transformer oil comprises the following effective components in parts by weight: 30 parts of aluminum oxide, 40 parts of sodium silicate and 30 parts of aluminum chloride.

The raw material alumina powder, sodium silicate powder and aluminum chloride powder plus mass fraction of 40% sulfuric acid are mixed evenly, and the mixture obtained in (1) is made into particles with a particle diameter of 2 mm by a molding machine; then the particles are placed Bake in an oven at 70°C for 2 hours; then quickly raise the temperature to 700°C, and dry for 1 hour to obtain the finished product of adsorbent granules 3 with a specific surface area of 256m ² /g.

When in use, put the finished product of the adsorbent particle 3 in the transformer oil to absorb it by natural sedimentation, and keep the temperature of the transformer oil at a relatively high temperature, such as 60°C, during the adsorption.

Example 2

This embodiment is the same as Embodiment 1 except the following features:

An adsorbent for degraded transformer oil comprises the following effective components in parts by weight: 40 parts of aluminum oxide, 30 parts of sodium silicate and 25 parts of aluminum chloride. Alumina, sodium silicate, aluminum chloride plus mass fraction are 25% sulfuric acid and are mixed evenly, and the mixture obtained in (1) is made into particles with a particle diameter of 3 mm by a molding machine; then the particles are placed in an oven at 70 Bake at ℃ for 2 hours; then quickly raise the temperature to 700℃, and dry for 1 hour to obtain the finished product of adsorbent particles 3, the specific surface area of the obtained particles is 262m ² /g.

After the finished product of adsorbent particles 3 is obtained, the adsorption filter plate is made according to the following method: the adsorption filter plate includes filter plate I1 placed on the upper layer and filter plate II2 placed on the lower layer; the filter plate I1 has a pore size of 200um, and the filter plate The pore size of II2 is 160um; the finished product of adsorbent particles 3 is evenly placed on the top of the filter plate II2, and filter paper or filter cloth is arranged above the finished product of adsorbent particles 3.

Example 3

This embodiment is the same as Embodiment 2 except the following features:

An adsorbent for degraded transformer oil comprises the following effective components in parts by weight: 35 parts of aluminum oxide, 35 parts of sodium silicate and 25 parts of aluminum chloride. Alumina, sodium silicate, aluminum chloride plus mass fraction are 30% sulfuric acid and mix uniformly, and the mixture obtained in (1) is made into particles with a particle diameter of 3 mm by a molding machine; then the particles are placed in an oven at 70 Bake at ℃ for 2 hours; then quickly increase the temperature to 700°C, and dry for 1 hour to obtain the finished product of adsorbent granules 3 with a specific surface area of 252m ² /g.

The finished adsorbent particle 3 is placed above the filter plate I1, and filter paper or filter cloth is placed above the finished adsorbent particle 3. The filter plate I1 has a pore size of 250 um, and the filter plate II2 has a pore size of 160 um.

Example 4

This embodiment is the same as Embodiment 2 except the following features:

A filter plate identical to that of filter plate II is arranged under the filter plate II.

Example 5

Table 1 is the performance index of transformer oil after using the adsorbent produced by the present invention.

Table 1 Comparison table of transformer oil before and after treatment

Claims (4)

1. a preparation method of transformer deterioration oil adsorbent, is characterized in that, the steps are as follows: (1) aluminum oxide, sodium silicate, aluminum chloride plus mass fraction are mixed uniformly with sulfuric acid of 25-40%; (2) the mixture obtained in (1) is made into particles with a particle diameter of 2-3mm by a molding machine; (3) Place the granules obtained in step (2) in an oven and bake at 70°C for 2 hours; then quickly raise the temperature to 700°C, and dry for 1 hour to obtain the finished dry granules; The dosages of aluminum oxide, sodium silicate and aluminum chloride are: 30-40 parts of aluminum oxide, 20-40 parts of sodium silicate and 20-30 parts of aluminum chloride, the parts are parts by weight. 2. The preparation method of transformer degraded oil adsorbent according to claim 1, characterized in that the amounts of alumina, sodium silicate, and aluminum chloride are: 30-35 parts of alumina, 30-35 parts of sodium silicate , 25-30 parts of aluminum chloride. 3. The preparation method of transformer degraded oil adsorbent according to claim 1, characterized in that the finished product of dried particles is used to make an adsorption filter plate: the adsorption filter plate includes filter plate I placed on the upper floor and filter plate placed on the lower floor II; the filter plate I has a pore size of 200-250 μm, and the filter plate II has a pore size of 160-190 μm; the finished particulate matter prepared in step (3) is evenly placed on the top of the filter plate II, and a filter paper or filter cloth. 4. An adsorbent prepared by using the preparation method of the transformer degraded oil adsorbent described in claim 1, 2 or 3.