Introduction Of Glass Fiber Extraction Thimbles

 Introduction Of Glass Fiber Extraction Thimbles

The glass fiber extraction thimbles are made of high-grade special ultra-fine glass wool and carefully processed by a special process. It is a high-efficiency filter device that collects harmful substances such as smoke, acid mist, and beryllium substitutes. Glass fiber extraction thimbles has the advantages of high-temperature resistance, low weight loss, high efficiency, and good strength.

Technical indicators

Temperature resistance: can withstand below 600 ℃. Resistance: 14-20mmHg. Efficiency: 99.9999% (for dust particles with a particle size ≥ 0.3 ч). Weight loss: 0.2%. The current extraction thimbles are all glass fiber (applicable below 400 degrees).

The weight must be weighed before the boiler dust sampling. In this process, it is best to dry and weigh in small batches. Because if it is a large batch, the opening and closing of the dryer cover during the weighing process will inevitably make it absorb moisture, which will increase the blank value and cause the measurement result to below.

Punching problem

Generally, there are two areas of the test hole that are not punched. One is on the horizontal pipe, in front of the base of the vertical chimney, and the other is on the vertical chimney. When the cross-sectional area of the flue is constant, it is considered that the location of the test hole is the same everywhere.

Because after the flue gas passes through the dust collector, the remaining part is only a part of the particulate smoke and the cold rail coil, so in the case of constant airflow, it generally cannot be completely settled.

For example, during a monitoring process, the glass screen printing machine, due to the opening of the plug, vibrated a part of iron filings. During the test process, I found that there were some iron filings in the extraction thimbles. Just imagine that the iron filings cannot be settled, not to mention the small Where’s the smoke? Therefore, when the cross-sectional area of the flue remains unchanged, the location of the test hole has little effect on the test result.

Of course, if there is a significant change in the cross-sectional area of the flue after the dust collector, it is better to punch the test hole at the end where the cross-sectional area of the flue becomes larger because this can make use of the larger cross-sectional area of the flue and slower airflow. Precipitating a part of smoke and dust, making the test result smaller.

What are the operating conditions of the glass fiber extraction thimbles?

Due to the characteristics of glass fiber, the following points must be paid attention to when using it. Before use, check that the two sampling heads are slightly blocked, slightly hooped, whether the taper is the same, matching, and the clearance is appropriate. When the extraction thimbles are loaded and unloaded, it is not affected by the force of tearing, shearing, etc., so that the extraction thimbles mouth is not broken.

If the glass fiber extraction thimbles are found to have voids, cracks, or uneven thickness, it cannot be used to avoid being blown by the airflow and causing sampling failure. It should be used within the specified temperature range to ensure that the extraction thimbles works under sufficient strength.

According to reports, when the glass fiber is heated to above 200°C and then cooled, its strength begins to drop continuously. After the fiber is heated to 510°C and cooled, its strength only maintains 35% of its original strength. The fiber can maintain high strength when heated, but after cooling, its strength is greatly reduced.

The glass fiber extraction thimbles have been widely used in China since it was put into production in 1974. Due to the use of glass fiber extraction thimbles, my country’s smoke and dust detection work has been greatly improved.

 Introduction Of Glass Fiber Extraction Thimbles

Use of Laboratory Extraction Thimble

 Soxhlet extraction is a form of continuous solid-liquid extraction in which a solvent is used to extract the desired compound from a solid material. Although there are other methods for extraction, such as adding solids directly to the solvent and adding filtration, Soxhlet synthesis is particularly effective when the solubility in the extraction solvent is limited, and the solvent will be repeatedly used during the extraction process.

The principle of Soxhlet extraction

Heat the flask containing the solvent to evaporate the solvent, and the solvent flows along the side arm until it reaches the condenser. The steam condenses and drips into the thimble in the extraction thimble, which should contain the material to be extracted.

The material to be extracted should be ground as much as possible, and the required compounds can be easily removed. Over time, the solvent will evaporate and concentrate from the flask to fill the extraction thimble. After filling the Soxhlet, the liquid content will be emptied back into the solvent bottle along with any compounds dissolved in the solvent.

This process will continue to circulate, and the solvent will evaporate from the flask and be refilled. Over time, all soluble components will be extracted into the round bottom flask. The compounds can then be separated by rotary evaporation. One of the most common uses of the extraction thimble is to obtain compounds from natural products, such as extracting compounds from seeds or fruits.

Key points of using extraction thimble

1. The size of the flask and the amount of solvent must be larger than the Soxhlet extraction capacity to avoid boiling and drying the solvent bottle and keeping the extracted components in solution when the extraction thimble is running. The choice of solvent is critical to the success of extraction.
2. Crushing, grinding, or shredding the extract can greatly reduce the time required for extraction. The solid is held in a sleeve usually made of cellulose. If you want to quantify the number of certain substances in the extract, the thimble may also have an internal standard added.
3. Firmly clamp the round bottom flask or pressurized pellet containing the solvent and stirring rod on the heat source. It is usually desirable to be able to remove the heat source at the end of the reaction, using a laboratory jack.
4. Soxhlet extraction may last an hour or may last several days, so the experiment needs to be prepared for extraction. The heat source needs to be protected.
5. In order to cool the solvent vapor in the condenser, an effective condenser is required.

Extraction thimbles are laboratory equipment designed to process certain solids. These devices continuously process samples with solvents over a period of hours or days to extract target compounds. They are commonly used by chemists in various fields of sample testing, analysis, quality control, and related applications. As a supplier of laboratory equipment, Hawach can provide various sizes of accessories and accessories.

Use of Laboratory Extraction ThimbleUse of Laboratory Extraction Thimble