Neutralization Reactor for Ammonium Nitrate Melt | Chemical Manufacturing Component

Product Specifications

Technical details and manufacturing context for Neutralization Reactor

Definition

The Neutralization Reactor is a critical component within the Continuous Ammonium Nitrate Melt Production and Concentration System. It is designed for the continuous, exothermic reaction between gaseous or aqueous ammonia and nitric acid to form an ammonium nitrate solution (melt). The reactor ensures precise control over reaction parameters such as temperature, pressure, and pH to maximize yield, maintain safety by preventing thermal runaway, and produce a consistent melt for subsequent concentration and prilling/granulation processes. The reactor operates on the principle of continuous flow neutralization. Pre-metered streams of nitric acid and ammonia are introduced into the reactor, often with vigorous mixing or agitation. The highly exothermic reaction (NH₃ + HNO₃ → NH₄NO₃) releases heat, which is typically managed via an internal cooling system (e.g., cooling coils or jacket) to maintain the melt at an optimal temperature (typically between 140-180°C) to prevent decomposition and ensure a stable product. The resulting ammonium nitrate melt is continuously discharged for the next stage of concentration. The reactor is typically constructed from corrosion-resistant materials such as stainless steel (e.g., 316L), Hastelloy, or specialty alloys, depending on the specific process requirements. Key parameters include rated capacity (10–50 m³/h), operating pressure (1.0–1.6 MPa), design temperature (150–200°C), pH control accuracy (±0.1), residence time (10–30 min), motor power (15–45 kW), agitator speed (60–180 rpm), heat transfer area (5–20 m²), material of construction (316L), corrosion allowance (3–6 mm), noise level (≤85 dB(A) at 1 m), and weight (2000–8000 kg). These values are reference ranges and must be verified for the specific model and application. The reactor is a component, not a standalone system, and its selection depends on the overall plant design. It is essential to confirm all parameters with the legal manufacturer or supplier before procurement.

Working Principle

The reactor operates on the principle of continuous flow neutralization. Pre-metered streams of nitric acid and ammonia are introduced into the reactor, often with vigorous mixing or agitation. The highly exothermic reaction (NH₃ + HNO₃ → NH₄NO₃) releases heat, which is typically managed via an internal cooling system (e.g., cooling coils or jacket) to maintain the melt at an optimal temperature (typically between 140-180°C) to prevent decomposition and ensure a stable product. The resulting ammonium nitrate melt is continuously discharged for the next stage of concentration.

Common Materials

Stainless Steel (e.g., 316L), Hastelloy, Specialty Alloys

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Capacity	10–50 m³/h	Throughput of ammonium nitrate melt
Design Temperature	150–200 °C	Max continuous operating temperature
pH Control Accuracy	±0.1 pH	Ensures neutralization completeness
Residence Time	10–30 min	For complete reaction
Motor Power	15–45 kW	For agitator driveIEC 60034
Agitator Speed	60–180 rpm	Variable speed for mixing
Heat Transfer Area	5–20 m²	For cooling/heating jacket
Material of Construction	316L	Stainless steel for corrosion resistanceASTM A240
Corrosion Allowance	3–6 mm	For acidic environmentISO 13709
Noise Level	≤85 dB(A)	At 1 m distanceISO 3744
Weight	2000–8000 kg	Depends on capacity and material

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Agitator/Impeller
Provides vigorous mixing of the nitric acid and ammonia feeds to ensure homogeneous reaction and efficient heat transfer.

Material: Stainless Steel or Corrosion-Resistant Alloy
Cooling Coils/Jacket
Removes the exothermic heat of reaction to maintain a safe and optimal operating temperature, preventing thermal decomposition.

Material: Stainless Steel
Feed Inlet Nozzles Part
Precise entry points for the separate streams of nitric acid and ammonia into the reactor.

Material: Corrosion-Resistant Alloy
Melt Outlet Nozzle Part
Controlled discharge point for the produced ammonium nitrate melt to flow to the next process stage (e.g., concentrator).

Material: Stainless Steel
Temperature & pH Probes
Sensors for real-time monitoring and control of critical reaction parameters.

Material: Sensor-specific (e.g., Hastelloy sheath)
Reactor Vessel
The pressure-containing body itself, where the neutralisation actually happens.

Manufacturers of Neutralization Reactor

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Frequently Asked Questions

What is the typical operating temperature range for the neutralization reactor?

The design temperature range is 150–200°C, but the optimal melt temperature is typically maintained between 140–180°C to prevent decomposition. Always verify the exact range for your specific model.

What materials are commonly used for construction?

Common materials include stainless steel (e.g., 316L), Hastelloy, and specialty alloys. The choice depends on the corrosive environment and process conditions. Confirm the material grade with the supplier.

How is the pH controlled in the reactor?

The reactor is designed to maintain pH control accuracy of ±0.1 to ensure complete neutralization. This is achieved through precise metering of acid and ammonia streams and continuous monitoring.

What safety considerations are important for this reactor?

The exothermic reaction requires careful temperature control to prevent thermal runaway. The reactor includes cooling systems and pressure relief mechanisms. Always follow the manufacturer's safety guidelines and verify compliance with relevant standards.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	0.5-2.0 bar (slightly above atmospheric to prevent air ingress)
flow rate:	5-50 m³/hr (continuous process dependent on plant capacity)
temperature:	150-200°C (typical operating range for ammonium nitrate melt production)
slurry concentration:	70-85% ammonium nitrate by weight (pre-melt concentration)

Neutralization Reactor

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