refineries in india

Hydrogen Generation system by Water Electrolysis.

The hydrogen generation system by water electrolysis developed by our department is based on summarizing previous achievements of scientific research and absorbing advantages of the same type of equipment home and abroad. After many years' efforts, it has gradually become the current serial hydrogen generator by water electrolysis with a fairly scale, different types and different specifications. The main technical index of the plant has approached or reached the international advanced level of the same products. The electrolyzer body is sealed closely so as to ensure no leak in the body under the condition of repeatedly switching on and off. It can be accorded with users' requirements to use pneumatic control, electric control or the most advanced microprocessor control. The plant has a high degree of automation and standardization and is easy to be operated and maintained. These products have been widely applied to many industries such as aerospace, power, electronics, metallurgy, chemical industry, meteorology and glass manufactures, and also exported to other countries.

Hydrogen Purification System by Catalyst
Based on the features of hydrogen generator by water electrolysis, H2 (O2) purification system is developed and marketed successfully by PERIC, this system can be acted as the downstream of hydrogen generator by water electrolysis but also as the independent purification system to purify the H2 ( O2) gas.
Through H2 (O2) gas purification system, the moisture, O2 (H2) and solid particles can be easily removed to satisfy the customer with higher quality. Up to now, multiple series and models have been developed to meet the different requirements by the customer.

Hydrogen Generation Plant by Methanol's
Hydrogen generation by methanolysis and water vapor conversion is one of industrial hydrogen generating method which is developed in the last two decades. Compared with other hydrogen production method, this technology is characterized by its less investment, simple operation and low operation cost, etc. and it has won more and more customers.

Gas Separation by PSA
The technology of gas separation by Pressure Swing Adsorption (PSA) has been rapidly developed by PERIC, which is mainly used for gas purification and recovery. This kind of technology have made itself secure an important place in the gas purification field in the last 20 years, due to simple process with automatic control system, lower power-consumption and operational cost with high reliability

PSA Nitrogen Gas Generators
safety Features and Audio Visual Alarms

The Nitrogen Gas Generator are Skid Mounted and Pre-commissioned at our works. Are fully automatic and requires virtually no attention of the Operator. Once started it can be left-unattended. All operations take place automatically and Nitrogen Purity remains very consistent. In case of any abnormality the gas Generator would trip automatically with Audio Visual Alarms for Necessary action.

In case of Storage Tank Getting Filled The Gas Generator Goes to Sleep and restarts Once the pressure in storage Tank is Reduces to set Limit.

Audio Visual alarms in our Standard System

* Air Compressor Trip
* Low Feed Air Pressure & High Air Inlet Pressure
* Low Surge Tank Pressure
* High & Very High Oxygen Content - 2 Set Limits
* High Moisture Content (Optional)
* High Storage Tank Pressure

Standard Scope of supply

* Air Intake after cooler, Moisture separator, Prefilter, Auto Drain valve & Wet Air Receiver
* Twin Tower Desiccant based Air Dryer Fully Automatic with Pneumatically Operated Changeover-Valves ( REF. Dryer - Optional )
* Dry Air Receiver with Pressure Gauge, Pressure Switch and Candle type After Filter
* Twin Tower P.S.A. Module with Automatic Pneumatically Operated Changeover valves, Pressure Gauges & Interconnecting Piping
* Surge Vessel with Instruments & Drain valve
* C.M.S. ( CARBON MOLECULAR SIEVES )
* One Charge filled in P.S.A. Adsorption Towers
* Flow meters for Nitrogen with Flow control valve, Nitrogen Three Way Vent Valve NRV and Back Pressure Controller
* Centralized control panel with sequence programmer and Fault Indications Lamps
* Online Oxygen Analyser with settable high oxygen and very high oxygen alarms.

The technology

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Well Proven Pressure Swing Adsorption Technology
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More Than 10,000 Units Working Satisfactorily Worldwide
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Skid Mounted Pre-commissioned Ready To Use Units

Fully Automatic Plant - Requires No Operator’s Attention
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Low Generation Cost - Pay Back Period Less Than A Year
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Negligible Maintenance No Hassles of Changing Cylinders
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Continuous Purity Check - Purity Up to 99.9999% Achievable

Our Nitrogen Generators operates on Pressure Swing Adsorption, commonly known as P S A Technology. P S A Technology is based on the selective adsorption phenomena of gas molecules under pressure on the surface of highly porous and efficient adsorbent, In this case of Nitrogen Generation the Adsorbent is carbon based Molecular Sieve (C.M.S.) In P S A System when compressed air is passed through a adsorption tower field with C.M.S. the molecules of oxygen, moisture & other unwanted gases are adsorbed on surface of C.M.S. and Nitrogen which is not adsorbed by C.M.S. comes out of adsorption tower and is collected in a surge vessel. For continuous generation of nitrogen two Adsorption towers are provided which are interconnected with Auto change over valves controlled by PLC in the control panel. After saturation of one tower with oxygen the process automatically changes over to another tower and thus the nitrogen production is continuous. Our systems are the best ones in industry to ensure the highest efficiency, user friendly design, Reliable Economical and Durable. Our onsite nitrogen generators are custom made and can be adjusted to give the desired nitrogen quality for your process and application.

Upstream Equipment for Feed Air

In case the Feed Compressed Air required for Nitrogen Generator is not available from your centralized air supply you will be required to attach the following upstream equipment.

Choose Between Screw or Reciprocating Compressor

Packaged Screw Compressor Air Cooled Lubricated Electrically Operated Silent, complete with integral Instruments & Starter Panel along with oil filters (needs no foundation and is vibration free) OR Oil free Water Cooled Reciprocating Compressor with its Standard Accessories, Electric Motor, Drive Arrangement, Foundation Bolts for Grouting it to Foundation, with Instrument Panel and Separate Motor Starter Panel.

Downstream Equipment for Nitrogen Purification

For Nitrogen required with oxygen content in PPM level following downstream equipments can be added.
1) Palladium based De-Oxo System
2) Copper based De-Oxo System

Allied Equipments / Accessories

* Ammonia Crackers & Manifolds
* Gas Purification & Mixing Stations
* Storage Vessels
* Gas Analysers

Methanol Reforming Based

The methanol and water is mixed in specified ratio and pressurized. This mixture is passed through evaporator, metering pump and then to super heater. This hot gas is then fed into a reactor. The reaction of methanol reforming and the shift reaction, takes place in the catalytic reactor of fixed beds simultaneously to form H2 and CO2 finally.

CH3OH=CO+2H2-90.7kj/mol

CO+H2O=CO2+H2+41.2kj/mol

The general reaction

CH3OH+H2O+3H2-49.5kj/mol

The mixed gas after reaction is passed though the heat exchanger to have the heat exchanged with feed gas in order to recover part of heat and then fed further into the gas-liquid separation buffer to separate the unreacted methanol and water, prior to passing to the condenser and cooling gas dryer for condensation in order to ensure the methanol in the reforming gas to meet the specified quality. The liquid from condensation and separation is the mixture of methanol and water, which are returned back to the feedstock tank for reuse. The reformed gas enters a set of PSA system, which separates all impurities through the adsorption and separation in one time. The hydrogen purification through PSA is adopted in the manner of 4-1-2/P and desorption at the atmospheric pressure (4 absorbers, one absorber is in adsorption, 2 times of pressure equalization). Each adsorber in a cycle undergoes adsorption (A); equalized pressure-drop for the first time (E1D); equalized pressure-drop for the second time (E2D); cis-exhale (PP), inverse purge (D); flushing (P); equalized pressure increase for the second time (E2R); equalized pressure increase for the first time (E1R) and the final pressurisation (FR). The four adsorbers shift regularly, alternating between adsorption and regeneration, according to the arranged program in a closed loop. In this way raw gas feeds and hydrogen withdraws continuously.
There are a small amount of carbon monoxide and about 35%(v/v) hydrogen in the desorbed off gas. If it is recovered and used as fuel, it brings the benefit of saving energy and minimizing the pollution.

Features

* Raw material resource is easier, storage is convenient, price is stable.
* Short in flow,high automation,simple operation
* Minimum land occupation,low cost,when capacity is 1500 nm3/hr and under,the land occupation is less than 400m2.
* Low electricity consuming and low cost.
* No environmental pollution.

Main Formula

CH3OH + H2O → CO2 + 3H2

Main Products Index

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Production capacity :-20 Nm3/hr – 4000 Nm3/hr
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Purity :-99% - 99.999%
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Temperature :-Ambient
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Pressure :-8 bar – 25 bar