Petroleum filter press is a commonly used solid-liquid separation equipment in oilfield production, and its working principle is to use a high-pressure pump to pass the pressure oil through the filter media such as small holes, filter cloth and filter plate, so that the liquid can penetrate the filter cloth and the solid particles are intercepted, so as to achieve the purpose of solid-liquid separation.
First, the working principle of the oil filter press.
The working principle of the oil filter press is mainly based on the pressure difference and the action of the filter medium. In the process of filter pressing, the high-pressure pump passes the pressure oil through the filter medium such as the small hole and the filter cloth, so that the liquid penetrates the filter cloth and the solid particles are trapped. As filtration progresses, solid particles gradually form a layer of filter cake on the surface of the filter cloth, and when the thickness of the filter cake increases, the filtration resistance will also increase, so it is necessary to clean the filter cake or replace the filter cloth to maintain the filtration efficiency.
Second, the composition of the oil filter press.
The oil filter press is mainly composed of the following parts:
1.Filter media: including filter cloth, filter plate, etc., is the key component to achieve solid-liquid separation.
2.High-pressure pump: used to provide pressure oil so that the liquid can penetrate the filter cloth and the solid particles are trapped.
3.Drive device: including motor, reducer, etc., used to drive the normal operation of the filter press.
4.Hydraulic system: used to control the pressure and action of the filter press to ensure the smooth progress of the filter press process.
5.Control system: It is used to control the automatic operation of the filter press and improve production efficiency.
3. Classification and application of petroleum filter press.
According to the different filter media, oil filter presses can be divided into two categories: plate and frame type and chamber type. The plate-and-frame filter press uses a piece of filter plate and frame to form a filter chamber, which is suitable for small batch production and batch productionThe chamber filter press uses a whole perforated plate and filter media to form a filter chamber, which is suitable for large-scale production and continuous production. In practical application, the appropriate type of filter press should be selected according to the actual situation.
Fourth, the work process of the oil filter press.
The workflow of an oil filter press generally includes the following steps:
1.Mixture feeding: The mixture to be filtered is added to the hopper and evenly mixed by a blender.
2.Filtration: The mixture enters the filter after being pressurized by the feed pump, and the solid-liquid separation is realized through the filtration action of the filter cloth and filter plate.
3.Cleaning: During or after filtration, the filter cake needs to be cleaned to remove impurities that remain on the filter cloth and filter plate. The cleaning liquid can be water, acid, alkali, etc., and the appropriate cleaning solution can be selected according to the actual situation.
4.Cake unloading: After the cleaning is completed, the filter cake is removed from the filter cloth and filter plate through the hydraulic system or mechanical device to complete a filtration cycle.
5.Regeneration: In order to improve the filtration efficiency and service life, the filter cloth and filter plate need to be regenerated, such as cleaning, replacement, etc.
6.Cycle: Repeat the above steps for the next round of filtration.
5. Advantages and disadvantages of petroleum filter press and application scope.
The oil filter press has the advantages of good separation effect, wide range of application and high degree of automation, but it also has the disadvantages of large investment and high maintenance cost. In practical application, the appropriate filter press type and process parameters should be selected according to the actual situation to achieve the best separation effect and economic effect.
To sum up, the oil filter press is an indispensable solid-liquid separation equipment in oilfield production. Knowledge of how it works, composition, classification, process, and scope of application can help to better use and maintain the filter press, improving the efficiency and effectiveness of oilfield production.