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Anhydrous Ammonia Storage & Handling

Engineered turnkey packages for bulk unloading, pressurized storage, electric/steam vaporization, and precision ammonia gas dosing in utility-scale SCR applications.

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Anhydrous Ammonia Storage & Handling

Turnkey Anhydrous Ammonia Handling, Storage & Vaporization Packages

The ASHS delivers anhydrous ammonia as a reagent to each boiler unit, consisting of two SCR of two SCR-- Reactors per boiler. The system is designed with two storage tanks and specialized specialized unloading equipment for truck cisterns, all installed in a HAZARDOUS area area classification requiring stringent safety protocols and equipment specifications. specifications.

YARA supplied the Ammonia Supply & Handling System (ASHS) for the L&T-MHPS Boilers Private Limited (LMB) project SJNV, BUXAR 2x660 MW project. This comprehensive system serves two hard coal-fired boilers, each generating live steam for 660 MWel output with separate SCR units for emissions control

System Architecture

Major Equipment & System Components

The ammonia storage and handling system comprises seven critical components designed for safe, efficient NOx reduction in the thermal power plant's emission control system.

01 / Unloading

Unloading Skid

Specialized equipment for safe ammonia transfer from delivery trucks to storage systems, featuring automated controls and safety interlocks.

02 / Compression

Compressor Skid

High-performance compression unit maintaining optimal pressure conditions throughout the ammonia distribution network.

03 / Storage

Anhydrous Ammonia Storage Tanks

2 units - Pressure vessels designed for long-term, safe storage of anhydrous ammonia with advanced monitoring systems.

04 / Vaporization

Ammonia Vaporizer Skids

3 units - Heat exchange systems converting liquid ammonia to gas phase for injection into the SCR system.

05 / Flow Control

Ammonia Flow Control Units

4 units - Precision flow control systems ensuring accurate ammonia dosing for optimal NOx reduction efficiency.

06 / Dosing

HCl Dosing Skid

Hydrochloric acid injection system for mercury control and additional emission reduction capabilities.

07 / Infrastructure

Support Structures

Engineered pipe and cable rack systems providing secure mounting and routing for all interconnecting utilities.

Technical specifications

Unloading Station

 Two unloading arms and compressors for safe truck-to-tank transfer with gas balancing system.

Technical specifications

Storage Tanks

Two $233\text{ m}^3$ tanks, each storing 14 days of ammonia supply at maximum load capacity

Technical specifications

Vaporization System

 Three steam-heated vaporizers (2 operational + 1 standby) with pressure regulation.

Technical specifications

Flow Control Units

 Four AFCU skids providing precise ammonia dosing to each SCR reactor.

Unloading Operations

01 / Connection

Truck Connection

Loading arms connect to truck with emergency release couplings and safety interlocks[cite: 7].

02 / Transfer

Closed Transfer

Compressors create pressure differential while gas balancing prevents atmospheric release[cite: 7].

03 / Recovery

Gas Recovery

Vapor recovery system captures remaining ammonia gas from empty trucks[cite: 7].

Equipment Specification

Unloading Compressors

Pressure & Temp

Design Parameters

Max. Design Pressure: 350 PSI
Max. Design Temp: 70 deg. C[cite: 8]

Build Material

Construction

Material: Carbon Steel[cite: 8]

Connections

Pipeline Interfacing

Inlet connection: 2" ANSI, 300#
Outlet connection: 3" ANSI, 300#[cite: 8]

Equipment Specification

Vaporizer System

Dimensions: 9000L X 2500B X 3200H[cite: 10]

Performance

Flow Rate

475 kg/hr[cite: 10]

Pressure

Operating Pressure

3.96 – 19.36 kg/cm²g[cite: 10]

Design Parameter

Design Pressure

30 kg/cm²g[cite: 10]

Thermal Range

Operating Temperature

3.3 – 95 deg. C[cite: 10]

Design Thermal Limit

Design Temperature

100 deg. C[cite: 10]

Vessel Specification

Storage Tank Specifications

Capacity

Tank Capacity

233.2 Cubic meters gross capacity per storage tank, designed for 14-day ammonia supply at maximum load conditions[cite: 9].

Pressure

Design Pressure

23 Bar maximum allowable working working pressure with stress-relieved fabrication and comprehensive safety systems[cite: 9].

Fill Factor

Maximum Fill Factor

85% maximum safe filling percentage to accommodate thermal expansion and maintain vapor space for pressure equilibrium[cite: 9].

Liquid Volume

Liquid Capacity

126 Metric tons of anhydrous ammonia ammonia storage capacity per tank at $-33^\circ\text{C}$ operating temperature[cite: 9].

Temperature Range

Design Temperature

$-33^\circ\text{C}$ to $+55^\circ\text{C}$[cite: 9]

104
Equipment Specification

Accumulator for Pressure Control

Dimensions: 2500L X 2400B X 3951H[cite: 11]

Pressure

Operating Pressure

19.39 kg/cm³g[cite: 11]

Design Parameter

Design Pressure

22.52 kg/cm2g[cite: 11]

Thermal Range

Operating Temperature

27 deg.c[cite: 11]

Thermal Limit

Design Temperature

75 deg.c[cite: 11]

Volume Capacity

Water Capacity

3088 litre[cite: 11]

Mass & Safety

Weight & Hydrostatic

Empty Weight: 8000 kg
Hydrostatic Pressure: 29.3 kg/cm2g[cite: 11]

Plant Safety

Safety Systems & Monitoring

01 / Detection

Gas Detection

Multiple $NH_3$ sensors with 25 ppm (yellow) and 50 ppm (red) alarm thresholds throughout facility[cite: 12].

02 / Mitigation

Sprinkler Systems

Water spray systems for tank cooling and ammonia gas absorption in leak scenarios[cite: 12].

03 / Decontamination

Emergency Showers

Seven safety shower stations for full body and eye washing at critical locations[cite: 12].

04 / Response

Emergency Controls

Push buttons, signal lamps, and automatic valve closures for rapid response[cite: 12].

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