In various industries, such as oil and gas, petrochemicals, water and wastewater treatment, power plants, and pharmaceuticals, precise and continuous chemical injection is required. One of the key equipment in this field is chemical injection units, which are designed and manufactured according to the desired fluid type, pressure, and flow rate. At the same time, using a double-head pump with an in-line shock absorber as an advanced solution can improve injection accuracy, reduce pressure fluctuations, and improve system efficiency.
This article provides a comprehensive review of injection kits with double-head pumps and in-line shock absorbers, describing their features, benefits, and applications.
What is a chemical injection package?
A chemical injection unit is a complete set of equipment used to inject chemicals into a process line at a specified flow rate and pressure. These units typically contain the following components:
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Syringe pump (metering pump).
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Chemical storage tanks
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Pipes and fittings
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Precision instruments and control valves
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Shock absorbers or shock absorbers
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Electrical panels and control systems
Each component plays a crucial role in the optimal performance of the unit. The choice of pump type and fittings depends entirely on the process requirements and operating conditions.
What is a double head pump?
A double-head pump is a reciprocating metering pump that has two separate pump heads instead of one. This particular design has several advantages:
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More stable injection: flow and pressure fluctuations are reduced due to the simultaneous movement of two diaphragms or pistons.
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Increased Flow Rate: Higher flow rates can be achieved with two heads.
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Possibility of injecting two fluids simultaneously: In some applications, it may be necessary to inject two materials simultaneously at a specific ratio.
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Improved reliability: If one of the heads has a problem, the second head can maintain system performance to some extent.
In-line shock absorbers and their function
One of the main challenges of metering with reciprocating pumps is the pulsation and pressure fluctuations generated in the injection line. This can lead to the following problems:
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Corrosion and damage to downstream equipment
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Loss of chemical injection accuracy
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Creates noise and vibration in the system
To solve this problem, a device called a pulse damper is used. When the pulse damper is installed inside the pipe, it can absorb pressure fluctuations and make the output flow uniform and stable.
Advantages of in-line shock absorbers
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Reduces pressure fluctuations and pulses
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Extend the life of valves and fittings
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Improve the quality of the injection process
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Reduced maintenance costs
Double-head pump in-line shock absorber injection package structure
A standard package contains the following sections:
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Double head metering pump
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Pump type: diaphragm pump or piston pump
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Material: stainless steel 316, PVC, PVDF or based on chemical compatibility
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High-precision injection capability and working pressure suitable for the process
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In-line shock absorbers
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Installed at the pump outlet
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Equipped with a membrane or air chamber to absorb pressure pulsations
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Material storage tanks
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Design based on daily or weekly consumption
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Material: Polyethylene, fiberglass or anti-corrosion metal
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Valves and fittings
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Pressure relief valve
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Check valve
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Drain sampling valve
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Instrumentation and control systems
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flow meter, pressure gauge
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Injection control automation system based on process signals
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Advantages of using a double-ended injection kit with an in-line damper
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Uniform and stable injection: The combination of a double-head pump with a shock absorber eliminates fluctuations.
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High Precision in Sensitive Processes: The pharmaceutical and food industries require precise injections, and this packaging can meet this requirement.
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Capable of operating at high pressures: suitable for oil, gas and petrochemical process pipelines.
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Increased service life of downstream equipment: due to reduced pulsation and hydraulic shock.
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Reduce energy consumption and maintenance costs: because equipment is less prone to depreciation.
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Possibility of custom design: based on fluid type, capacity and project criteria.
Lewa pumps and complete equipment for oil and gas
Application of double-head injection molding machine with inline damper
This software package is used in various industries, including:
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Oil & Gas Industry: Injecting anti-corrosion, anti-foam, biocide and demulsifier materials.
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Power Plants: Injecting chemicals to treat water from boilers and cooling towers.
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Water and wastewater industry: chlorine injection, polyelectrolytes, and coagulants.
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Food and pharmaceutical industries: high-precision additive injection.
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Petrochemical: Injecting acids, alkalis, solvents.
Points to consider when choosing a double-ended injection kit with in-line damper
To choose the right package, you should pay attention to the following points:
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Fluid type and its chemical properties (corrosiveness, viscosity, temperature).
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Required injection flow
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Process line pressure
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Environmental conditions (temperature, humidity, installation space).
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The safety and quality standards required for the project
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Control and automation capabilities (analog or digital).
Conclusion
Injection units with double-head pumps and in-line dampers are one of the most advanced and efficient solutions for precise and stable injection of chemicals in various industries. The combination of these two technologies significantly reduces pressure fluctuations, extends equipment life, and improves process quality.
In projects where high precision and injection flow stability are critical, such devices will be the best choice. Its design and construction should also be carried out by specialized companies and follow internationally recognized standards to ensure maximum efficiency and safety.