Propane-air, also called LPG-Air or SNG, is essentially synthetic natural gas that is formed by mixing vaporized propane or LPG with air. Once mixed it forms a homogeneous mixture that can be used as a direct replacement for natural gas in combustion applications. The only restrictions are those processes using natural gas that are intolerant of any nitrogen such as hydrogen atmosphere generators.

Propane Air Mixing Systems - Industrial Back-up

Companies in most industries require a back-up system for their primary energy source when there is a risk of energy interruption or when there is a significant economic benefit. This holds true especially for companies using natural gas that have loads greater than 2 million Btu/Hour.

Many industrial processes operate continuously. Fuel interruption halts mass production and as a result major economic losses are incurred. In some cases, as it is in the Glass Industry, fuel interruptions are devastating. Fuel shortage not only results in production losses, there are also hundreds of thousands of dollars lost in capital investments. Covering this risk with a back-up fuel system is a requirement.

The goal for companies in all industries is to be in a competitive position. Seeking a reliable and environmentally friendly energy source that will also offer the lowest possible manufacturing costs can put them ahead of the game. Propane-air back-up systems allow companies to benefit from interruptible Natural Gas rates while relying on environmentally clean fuel sources.

Propane-Air standby systems allow natural gas users the ability to have live back-up when ever required. Because propane air is a "synthetic natural gas" (SNG), it can be used as a direct substitute for natural gas. Unlike diesel, fuel oil or propane, SNG does not require additional gas trains, piping, regulators, or special fuel delivery systems inside the factory. The propane air mixture is simply connected to the natural gas piping just after the metering station (and pressure reducing station) but before entering the building(s). These systems can be placed in live back-up so that they take over upon falling pressure, or they can be turned on manually. In either the case it is akin to having an electrical generator.

There is no size limitation for these systems but generally speaking it is not economically feasible for loads less than 1-2 million Btu/hr.

Utility Peak Shaving with Propane-Air

A leading source of energy in the world today is Natural Gas. Expanding economies and the deployment of gas turbine electricity generation facilities increase the demand for natural gas, resulting in lower pipeline and distribution pressures and the need for additional investment in pipelines, distribution grids, and operating wells. High winter demands also put a strain on natural gas distribution. Natural Gas LDC's have a limited number of options available to help balance and minimize the effects of these constraints - the use of storage buffers and peak shaving systems are two primary examples.

When it comes to peak shaving there are two choices - LNG and Propane-Air. A typical propane-air peak shaving plant consists of LPG storage facilities, truck unloading station, transfer pumps, propane vaporizers, air compressors, propane-air mixer, gas flow rate and calorific value measurement device, and system controls. The benefits of propane-air peak shaving over using LNG are significantly lower capital investment, ease of fuel storage and lower maintenance costs. The drawback to using propane-air is the higher cost of fuel and the need for compressed air when mixing. In most cases the differential in initial capital investment is so extreme that propane-air peak shaving systems are favored.

ALgas's Packaged (propane-air) Systems provide a complete solution for backing up Natural Gas. Simply connect to the fuel storage vessel and the natural gas piping feeding the process load. These systems can also be used prior to natural gas availability.

XPV Packaged Propane-air Mixing System

XPV systems are self-contained units that provide a natural gas compatible mixture of propane and air or LPG vapor and air. These systems are supplied with a dry electric vaporizer and a venturi mixer. An accumulator tank enables the venturi to cycle on and off to meet the required load allowing 100% turndown. Operation is quiet, reliable and safe.

Compact unit incorporates XP electric vaporizer, venturi mixer, and surge tank for ease of installation and operation.

Venturi silencer promotes quiet operation.

Perfect for confined space applications and those requiring additional security - schools, bakeries, general industry - these systems are explosion proof and take up very little space.

Ready to operate in 1 minute from a cold start.

Available in most voltage configurations.

XPM Electric LPG-Air Mixing System

Integrated unit comprised of an XP electric vaporizer and matching venturi mixer.

This unit is similar to the XPV system but does not include an integrated surge tank, thus permitting connection to a locally supplied surge tank.

The vaporizing section transforms incoming liquid LPG to the vapor phase, while the venturi assembly mixes the vapor LPG with atmospheric air to produce a natural gas compatible air/gas mixture.

DFV Packaged Natural Gas Replacement System

DFV propane-air mixing systems from Algas-SDI are self contained units providing a mixture of LP-gas vapor and air which can replace natural gas. DFV systems use the Algas-SDI Direct Fired vaporizers and the Algas-SDI atmospheric venturi system packaged together with an ASME constructed accumulator tank. The gas is mixed with air in the venturi and stored in the accumulator tank to provide uninterrupted flow of mixed gas from full flow to zero flow, automatically.

A liquid pump such as the Algas-SDI STABILAIRE pump system may be required to provide sufficient gas pressure for the mixing process.

100% turndown means these units are perfect for variable or steady loads.

Gas fired vaporizer with electric control system.

QM Packaged Propane-Air Back-Up System

The Algas-SDI QM natural gas replacement system is a combination gas fired waterbath LPG vaporizer and atmospheric venturi LPG/air mixer. All QM models feature an Eclipse Combustion ThermAir forced draft burner and Algas-SDI optimized venturi mixers. PLC controls with an easy to use operator interface are provided in a temperature controlled enclosure to ensure long-term reliable operation. A "Smart-Start" cold start feature automatically senses and controls the inlet propane pressure to make sure only vapor is fed to the burner until the bath is warm enough for full vaporization. When the bath has reached operating temperature an output is switched by the PLC that turns on the LPG pump (STABILAIRE). A maintenance program tracks the hours used, venturi cycles, and burner cycles to allow the user to schedule service accordingly. Flow totalization is also provided for convenience.

Compact system comprised of vertical waterbath vaporizer and atmospheric venturi mixer.

A forced draft burner keeps the waterbath at optimum vaporizing temperature.

Powder coated galvanized steel cabinet.

All these packaged systems are used for producing of alternative fuel which can replace natural gas.

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