Nitrogen Generator for Coal Mining in Sichuan, China

Coal Mining Nitrogen System Configuration

The KFD97-1200 is a PSA nitrogen generation system configured to supply 1,200 Nm³/h of nitrogen at ≥97% purity and an adjustable delivery pressure of 0–0.6 MPa.

Huatai supplied this fixed indoor system to Sichuan Guxu Coalfield Development Co., Ltd. for continuous nitrogen supply at a new coal mining project. The system uses Siemens PLC control and, according to available project records, has operated for more than eight years.

Huatai configures coal mining nitrogen generation systems around the required nitrogen purity, flow, pressure, operating schedule and installation conditions. Contact us to discuss your project requirements.

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Nitrogen Requirement for the Coal Mining Project

Sichuan Guxu Coalfield Development Co., Ltd. required a dedicated nitrogen supply system for a new coal mining project. As no existing nitrogen source was available at the site, an on-site system was needed to meet the project’s continuous nitrogen demand.

The customer specified three primary operating parameters: nitrogen purity of ≥97%, a production capacity of 1,200 Nm³/h and an adjustable delivery pressure of 0–0.6 MPa. These requirements formed the basis of the KFD97-1200 system configuration.

Project Requirements

  • On-site nitrogen generation for a new coal mining project
  • Continuous nitrogen supply for the coal mining process
  • Nitrogen purity: ≥97%
  • Nitrogen flow: 1,200 Nm³/h
  • Delivery pressure: 0–0.6 MPa

Huatai configures nitrogen generators for coal mining according to the specific application, required nitrogen purity, flow rate, delivery pressure and operating schedule.

Why the KFD97-1200 Was Selected

The KFD97-1200 nitrogen generator was selected around the required 1,200 Nm³/h capacity, at least 97% nitrogen purity and delivery pressure up to 0.6 MPa.. The system needed to deliver 1,200 Nm³/h of nitrogen while meeting the specified purity and delivery-pressure requirements.
For a project of this scale, nitrogen flow, purity, delivery pressure, operating schedule and available compressed-air conditions must be evaluated together. The required flow should always be assessed at the specified nitrogen purity rather than treated as an independent nominal value.
Customer Requirement Project Configuration
Nitrogen Purity ≥97%
Nitrogen Flow 1,200 Nm³/h
Delivery Pressure 0–0.6 MPa
Operating Mode Continuous
Installation Type Fixed
Installation Environment Indoor Equipment Room
Power Supply 380/220 V

Complete Nitrogen Generation System

Huatai configured an integrated nitrogen generation system covering compressed-air treatment, nitrogen separation, nitrogen buffering and automatic control. The equipment was arranged as a fixed installation in the customer’s indoor equipment room.

System Configuration

  • 1. Four-stage filtration system
  • 2. Refrigerated air dryer
  • 3. Oil removal unit
  • 4. KFD97-1200 nitrogen generator
  • 5. Nitrogen buffer system
  • 6. Siemens PLC control system

Process Flow

Compressed Air → Four-Stage Filtration → Refrigerated Air Dryer → Oil Removal → KFD97-1200 Nitrogen Generator → Nitrogen Buffer System → Coal Mining Process


Air treatment, nitrogen generation and nitrogen buffering equipment installed for the project.

Automatic Control

The Siemens PLC manages the programmed operating sequence and valve switching. During normal operation, the nitrogen generator completes its operating cycles according to the configured control logic. Routine inspections and scheduled maintenance remain part of the site’s operating procedures.

Key System Features

  • 1,200 Nm³/h Nitrogen Capacity
  • Siemens PLC Control
  • Siemens PLC Control
  • Configured for Continuous Operation

Huatai provides complete Gas Generation Solutions covering air treatment, gas separation, buffering and automatic control based on project requirements.

Indoor Installation and Engineering Service

The KFD97-1200 nitrogen generation system was installed in a dedicated indoor equipment room at the customer’s site. The fixed layout integrates the air-treatment section, nitrogen generator, buffer system and control equipment within one operating area, providing access for routine inspection and maintenance.

Available project records also show Huatai engineers carrying out on-site service work for the installed system. The images document the equipment condition, system layout and engineering activities at the project site.

On-Site Project Details

    • Complete equipment-room layout
    • KFD97-1200 nitrogen generator
    • Compressed-air treatment equipment
    • Nitrogen buffer system
    • Siemens PLC and field instruments
    • On-site service work by Huatai engineers
    • Pipeline, valve and control-section inspection points

Huatai provides applicable nitrogen generator service for installed systems according to the project scope and equipment condition.

Operation After More Than Eight Years

The KFD97-1200 nitrogen generation system was installed and commissioned for the customer’s coal mining project. According to the available project record, the system has remained in operation for more than eight years.
This project provides a reference for an on-site nitrogen system configured to deliver 1,200 Nm³/h at a purity of ≥97%, with an adjustable delivery pressure of 0–0.6 MPa and support for continuous operation.

System Installation and Supply Parameters

        • KFD97-1200 system installed and commissioned
        • On-site nitrogen generation capacity established
        • Nitrogen flow configured at 1,200 Nm³/h
        • Nitrogen buffer system
        • Nitrogen purity configured at ≥97%
        • Delivery pressure set at 0–0.6 MPa
        • Fixed indoor installation completed

Continuous Operation and Project Support

            • System configured for continuous operation
            • More than eight years of operation documented
            • On-site service provided by Huatai engineers

Planning a Nitrogen System for a Coal Mining Project?

The appropriate nitrogen generation system for a coal mining project depends on the specific application, required nitrogen purity, flow rate, delivery pressure, operating schedule, available compressed-air conditions and installation environment.
Share your process and site requirements with Huatai. Our engineering team can review your nitrogen demand and recommend a complete on-site nitrogen generation configuration for your project.
Explore Huatai’s nitrogen generation solutions or share your process parameters for a project-specific configuration review.