Blending Skids

Our fuel gas blending skids are designed to efficiently blend biogas with natural gas for boilers and generators, optimizing the use of renewable energy sources. These systems prioritize biogas, such as digester or landfill gas, reducing the consumption and cost of natural gas. Ideal for facilities with an existing biogas supply, our blending skids ensure consistent energy production while cutting down on natural gas reliance.

  • Overview
  • Application
  • Features
Overview

Boiler or generator owners who have invested in a source of biogas, such as digester gas or landfill gas, aim to maximize the use of their “free gas.” Preferred’s gas blending skids are designed to optimize this process. 

  • Maximizing Free Gas Use: Owners of boilers or generators using biogas (such as digester or landfill gas) aim to maximize the use of their “free gas.”

  • Optimized Blending Skids: Preferred’s gas blending skids are specifically designed to optimize the use of biogas.

  • Real-Time Monitoring: Our skids continuously monitor the availability and flow of biogas to ensure efficient usage.

  • Low Demand Operation: During low demand periods, the skids utilize as much biogas as possible.

  • Load Management: When the load exceeds the available biogas supply, the blending skid automatically integrates natural gas to meet the demand.

  • Controlled Blending: The blending process is meticulously controlled to manage fuel variability and quality.

  • Considerations for Fuel Management: The system accounts for variable Btu values, gas engine requirements, and cold start considerations, ensuring balanced and efficient fuel management.

This blending process is meticulously controlled to address the variability and quality of the fuel. Our systems take into account the variable Btu values of the fuel, the specific requirements of gas engine applications, and considerations for cold starts, ensuring balanced and efficient fuel management.

Application

In industrial settings, blending skids are used to manage and optimize fuel supplies, particularly when different types of fuels are available.

  • Power Generation: In power plants and cogeneration facilities, blending skids manage and optimize the mixture of fuels like biogas and natural gas to ensure efficient and stable operation of boilers and generators.

  • Waste Management: Facilities that process biogas from landfills or digesters use blending skids to optimize the use of renewable biogas and supplement it with natural gas or other fuels as needed.

  • Chemical Processing: In chemical manufacturing, blending skids are used to mix different chemicals or feedstocks in precise ratios, ensuring consistency and quality in the final product.

  • Petrochemical Industry: Blending skids help in blending various grades of hydrocarbons or additives to produce specific formulations for fuels or lubricants.

  • Refineries: Refineries use blending skids to mix different types of crude oil or refined products to achieve desired specifications and optimize production.

  • Food and Beverage: In the food and beverage industry, blending skids are used to mix ingredients or additives accurately to ensure product consistency and quality.

  • Pharmaceuticals: Blending skids help in the precise mixing of pharmaceutical ingredients to ensure uniformity and compliance with strict industry standards.

Features

  • Supply Pressure Transmitters: Installed at the inlet of both the biogas and natural gas trains, these transmitters confirm gas availability and may also pressure-compensate the gas flow meters.

  • Gas Flow Meters: Pressure and temperature-compensated flow meters provide critical input to the control system, ensuring accurate measurement of gas flow rates.

  • Flow Control Valves: Electric or pneumatic flow control valves regulate the flows of biogas and natural gas, achieving the desired gas mixture with precision.

  • Discharge Pressure Transmitter: This component helps maintain the discharge pressure of the blended gas within acceptable limits.

  • Wobbe Index Analyzer: To ensure proper combustion, a Wobbe Index or Btu analyzer measures the heating value of the fuel, especially when using specific combinations of biogas fuels and fired devices.

  • Controls: The system is managed by a Preferred PWC or third-party PLC, with color touchscreens providing an intuitive interface for operators and service technicians.

  • Materials of Construction: Natural gas trains are typically constructed from carbon steel valves and piping, while biogas trains use 304 or 316 stainless steel based on biogas composition. Electrical enclosures are built to NEMA 4, NEMA 4X, or NEMA 7 standards, depending on local requirements.

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