An in-depth look at desanders: function, construction and application

The desander plays a vital role in numerous devices in the industrial and environmental fields. It is a device specially designed to remove solid particles of impurities in the fluid, which is of great significance to guarantee the smooth running of the process, improve product quality and protect the environment.

Working principle of desander

Desander based on the principle of centrifugal separation and gravity settling work. When the sand-containing fluid enters the cylinder of the desander tangentially at a certain speed, it will produce a strong rotary motion. Under the action of centrifugal force, solid particles such as sand grains with larger density are thrown to the cylinder wall, and move down along the cylinder wall under the action of gravity, and finally fall into the sand collection hopper. The separated fluid will form an upward vortex and be discharged from the outlet of the desander, thus realising the purpose of solid-liquid separation.

Basic structure of desander


Desander usually consists of the following main parts:

  1. inlet and outlet: the fluid enters the desander through the inlet and is discharged from the outlet after treatment.
  2. Cylinder: As the main part of the desander, the cylinder provides a space to hold the fluid and carry out the separation operation.
  3. cyclone: this is the core part of the desander, by generating a cyclone field, solid particles move towards the wall under the action of centrifugal force.
  4. Sand collection hopper: It is used to collect the separated solid particles for regular cleaning.
  5. control system: used to monitor and adjust the operating parameters of the desander to ensure its stable and efficient operation.

Usage of desander

  1. petroleum industry: in the process of oil extraction and processing, to remove sand and other solid impurities in crude oil, to protect equipment from wear and tear, and improve the quality of oil products.
  2. water treatment: used to purify drinking water, industrial water and sewage treatment, remove sand, gravel and other impurities in water, improve water quality.
  3. Mining industry: in the process of ore dressing, separating sand and fine particles in the ore, improving the grade of the ore.
  4. Chemical industry: to remove impurities in chemical raw materials and products, to ensure the smooth running of the production process and product quality.

Precautions for using desander

  1. Installation position: according to the flow direction of the fluid and process requirements, choose a suitable installation position to ensure the effect of desanding and normal operation of the equipment.
  2. Regular maintenance: Regularly check and clean up the sand collection hopper to prevent excessive accumulation of sand particles affecting the effect of sand removal. At the same time, check and maintain the various parts of the equipment to ensure that they are in good working condition.
  3. Operation parameter control: control the flow rate, pressure and other operation parameters in strict accordance with the operation manual of the equipment, to avoid poor desanding effect or equipment damage due to improper parameters.
  4. Reasonable selection: According to the nature of the treated fluid, flow rate and the size and concentration of solid particles and other factors, select the appropriate model and specifications of the desander to meet the actual needs.

 Benefits of Desanders

First of all, in industrial production, desander effectively protect the production equipment. Industrial fluids are often mixed with sand and other impurities, these impurities in the fluid flow process will cause serious wear and tear and damage to pipelines, valves, pumps and other equipment. In the long run, the cost of repair and replacement of equipment will increase significantly, and may even lead to production interruption, resulting in huge economic losses. The desander can remove these sand impurities in a timely manner, significantly reduce the wear and tear of the equipment, extend its service life, reduce the frequency and cost of equipment maintenance and replacement, to ensure the continuity and stability of production, thereby improving the reliability and efficiency of the entire production system. Secondly, for the improvement of product quality, desander also plays a key role. In many production processes, the purity of the fluid directly affects the quality of the final product. For example, in the chemical industry, if the raw material fluid contains sand particles, it may lead to incomplete chemical reactions, reduced product purity, and even affect the performance and safety of the product. In the food and pharmaceutical industries, the presence of impurities is even more strictly prohibited, as it may contaminate the product and jeopardise the health of consumers. By removing sand and other impurities from the fluid, desander ensures the purity of the fluid used in the production process, which in turn helps to produce high-quality, standard-compliant products and enhances the market competitiveness of the enterprise. Furthermore, grit removers have significant advantages in improving energy efficiency. When grit accumulates in pipes and equipment, it increases the resistance to fluid flow, leading to increased energy consumption. By using grit removers to keep fluid passages clear, the pressure loss during fluid transport can be reduced, reducing energy waste. This not only helps to reduce the enterprise’s energy costs, but also helps to achieve the goal of energy conservation and emission reduction, in line with the requirements of sustainable developmentIn terms of environmental protection, the desander also has important significance. Sandy wastewater generated in the industrial production process, if directly discharged without treatment, will cause serious pollution to the environment and damage the ecological balance. Desander can effectively remove the sand and impurities in the wastewater, so that the treated wastewater meets the environmental emission standards, reducing the harm to the soil, water and other ecological environment. At the same time, through the recovery and treatment of separated sand and impurities, it can also achieve the reuse of resources, further reducing the pressure on the environment.In addition, the use of desander can also optimise the production process. In some processes that require high-precision control and stable fluid quality, such as electronic chip manufacturing, fine chemicals, etc., the desander can provide a pure and stable fluid environment, which helps to improve the precision and stability of the process, thus producing higher quality products. Moreover, the degree of automation of the desander is increasing, and it can realise remote monitoring and operation, which reduces manual intervention and improves the efficiency and accuracy of production management.

Finally, the desander also has a positive effect on safeguarding the safety of operators. In some high-pressure, high-temperature fluid handling systems, the presence of sand particles may cause equipment failure and explosion and other safety accidents. The use of desander reduces such risks and creates a safer working environment for operators.

In summary, desander in industrial production, environmental protection, energy saving, product quality improvement and to protect the safety of personnel and so on many aspects have brought a lot of benefits, is the modern industry and environmental protection field indispensable important equipment.


 How to choose the right desander for you:

Define their own treatment needs

  1. Accurate assessment of the treatment flow: the need to treat the fluid flow for accurate measurement and evaluation. Flow is too small, may lead to low production efficiency; flow is too large, if the desander processing capacity is insufficient, will make the sand residue, affecting the process quality and equipment life. Therefore, it is necessary to ensure that the flow rate of the selected desander is perfectly matched with the actual demand.
  2. Determine the characteristics of sand content: in-depth investigation of the concentration of sand in the fluid and the size distribution of particles. Sand concentration is high, large particles of fluid, need a strong separation capacity and efficient filtration system desander; for sand concentration is low, small particles of fluid, you can choose a relatively simple but still meet the requirements of the desander model, in order to achieve the optimisation of the price-performance ratio.

Consideration of fluid properties and installation environment

  1. Analyse the nature of the fluid: a comprehensive understanding of the fluid viscosity, temperature, pressure and chemical properties and other key elements. For high temperature, high viscosity or corrosive fluids, special materials and structural design of the desander must be selected, such as high temperature, corrosion-resistant materials to ensure that the equipment in harsh conditions for long-term stable operation, effective resistance to fluid erosion and damage.
  2. Examine the installation conditions: fully consider the space size, shape and overall layout of the installation site. Choose the desander with appropriate size and compact structure, which not only can be easily installed in the established position, but also saves space to the maximum extent. At the same time, a reasonable layout should facilitate subsequent maintenance of equipment, parts replacement and operation, improve efficiency and convenience.

Comprehensive other important factors

  1. Balance between desanding efficiency and cost: According to the strict requirements for desanding effect in specific application scenarios, carefully weigh the desanding efficiency and equipment cost. In some of the sand removal precision requirements are very high in the field, such as high-end manufacturing, pharmaceutical production, etc., need to spare no expense to choose to achieve ultra-high sand removal efficiency of the advanced desander; in some of the relatively loose requirements of sand removal in the industrial process, you can ensure that under the premise of the basic desanding effect, the choice of a more affordable equipment, to achieve the optimal balance of cost and performance.
  2. Formulate a reasonable cost budget: Combined with their own financial situation and project investment planning, comprehensively consider the purchase cost of the equipment, installation and commissioning costs, energy costs during operation, as well as later maintenance and parts replacement costs. Through detailed cost analysis and comparison of different brands and models of desander offer, make a wise investment decision to ensure that the demand is met while achieving efficient use of funds.
  3. Emphasis on brand and quality assurance: Priority is given to brands with good reputation and wide popularity in the industry, as well as those manufacturers with mature production technology, strict quality control system and perfect after-sales service network. Famous brand usually means more reliable product quality, more advanced technology research and development and more timely and effective after-sales support, can provide users with long-term stable use of security and technical consulting services.
  4. Concerned about the convenience of maintenance and operation: select easy to maintain and operate the desander, for example, with easy to disassemble and clean parts, intelligent monitoring and fault diagnosis system. This can significantly reduce the maintenance personnel’s work intensity and technical difficulties, reduce the downtime and production delays caused by equipment maintenance and operation complexity, thus improving the overall production efficiency and economic benefits.


In summary, only comprehensive consideration of the above aspects, and in-depth and detailed analysis and comparison, in order to successfully select the most suitable for their own needs and the actual situation of the desander, for the stable operation of the production process and quality improvement to provide a strong guarantee.