---
title: "Off-gas Cleaning System"
industry: "Basic Metal Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:OFF_GAS_CLEANING_SYSTEM"
  data_integrity_hash: "2fa0d39138943b435773aa1a4d805373"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:OFF_GAS_CLEANING_SYSTEM"
  data_source_uri: "https://cnfx.com/llms/industry/basic-metal-manufacturing/product/off-gas-cleaning-system.md"
  official_resource_url: "https://cnfx.com/industry/basic-metal-manufacturing/product/off-gas-cleaning-system"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-2.0 bar differential pressure across filter media, 150-250°C gas inlet temperature, 10-30 m/s gas velocity in ductwork"
    unit: "Nm³/h"
engineering_limits:
  max_safe_operating_point:
    value: 2.5
    unit: "bar"
    consequence: "Filter media tensile failure due to excessive pressure differential, polymer degradation via Arrhenius kinetics at elevated temperatures, abrasive wear following Finnie's erosion model at critical particle impact velocity"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Condensation formation due to gas temperature dropping below acid dew point (150°C for sulfuric acid)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Insulated ductwork with temperature monitoring and automatic bypass to maintain gas temperature above 180°C"
  - node_2:
      trigger: "Pulse-jet cleaning system solenoid valve coil failure due to 24VDC supply voltage drop below 18V"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Redundant power supply with automatic transfer switch and voltage monitoring at 20V threshold"
bom_nodes:
  quench-tower:
    type: "part"
    urn: "URN:CNFX:ME:QUENCH_TOWER"
    interface_type: "physical-logic-coupled"
  bag-filter-house:
    type: "part"
    urn: "URN:CNFX:ME:BAG_FILTER_HOUSE"
    interface_type: "physical-logic-coupled"
  id-fan:
    type: "part"
    urn: "URN:CNFX:ME:ID_FAN"
    interface_type: "physical-logic-coupled"
  dust-handling-system:
    type: "part"
    urn: "URN:CNFX:ME:DUST_HANDLING_SYSTEM"
    interface_type: "physical-logic-coupled"
  scrubber:
    type: "part"
    urn: "URN:CNFX:ME:SCRUBBER"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 8573-1:2010 (COMPRESSED AIR PURITY CLASSES AND CONTAMINANTS)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/ASME B31.3:2022 (PROCESS PIPING DESIGN AND CONSTRUCTION)"
    scope: "Verified Engineering Specification"
  - standard: "DIN EN 1092-1:2018 (FLANGES AND THEIR JOINTS FOR PIPING SYSTEMS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/basic-metal-manufacturing/product/off-gas-cleaning-system.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "d853b29c20fbe5d2f5b1c5818e838e87ad5e1626b6bcfb6edb878da655bc58ce"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Off-gas Cleaning System

## 1. Technical Definition
A system designed to remove pollutants and particulate matter from exhaust gases generated during steelmaking processes.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-2.0 bar differential pressure across filter media, 150-250°C gas inlet temperature, 10-30 m/s gas velocity in ductwork**. Failure boundary: **Filter media rupture at 2.5 bar differential pressure, baghouse fabric degradation above 280°C, ductwork erosion at 35 m/s gas velocity**, Mechanism: **Filter media tensile failure due to excessive pressure differential, polymer degradation via Arrhenius kinetics at elevated temperatures, abrasive wear following Finnie's erosion model at critical particle impact velocity**.

### 2.1 Analytical Physics Model
Governed by the **Hansen Solubility Distance (HSP)**:

> **Primary Equation**: $R_a = \sqrt{4\Delta\delta_d^2 + \Delta\delta_p^2 + \Delta\delta_h^2}$  
> **Engineering Impact**: Predicts seal/gasket swelling when exposed to CIP chemicals.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| \delta_d | Dispersive | Engineering Constant |
| \delta_p | Polar | Engineering Constant |
| \delta_h | Hydrogen | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Condensation formation due to gas temperature dropping below acid dew point (150°C for sulfuric acid) | 8 | Corrosive attack on carbon steel ductwork following Arrhenius corrosion kinetics | Insulated ductwork with temperature monitoring and automatic bypass to maintain gas temperature above 180°C |
| Pulse-jet cleaning system solenoid valve coil failure due to 24VDC supply voltage drop below 18V | 8 | Filter bag blinding and pressure drop exceeding 2.5 bar across filter media | Redundant power supply with automatic transfer switch and voltage monitoring at 20V threshold |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | Nm³/h | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Quench Tower](https://cnfx.com/llms/industry/chemical-manufacturing/product/quench-tower.md) `(Standalone System)`
- [Bag Filter House](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/bag-filter-house.md) `(Standalone System)`
- [ID Fan](https://cnfx.com/llms/industry/chemical-manufacturing/product/id-fan.md) `(Standalone System)`
- [Dust Handling System](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/dust-handling-system.md) `(Standalone System)`
- [Scrubber](https://cnfx.com/llms/industry/chemical-manufacturing/product/scrubber.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Induced Draft Fan**, **Wastewater Treatment System**, **Baghouse Filter System**  
**Downstream Applications**: Steel Slabs, Steel Coils, Steel Billets  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What pollutants does this off-gas cleaning system remove from steelmaking exhaust?
**A**: Our system effectively removes particulate matter, sulfur oxides, nitrogen oxides, and other pollutants generated during steelmaking processes using a combination of bag filtration and scrubbing technologies.

### Q: Why are different materials like carbon steel and stainless steel used in the construction?
**A**: Carbon steel provides structural strength for most components, while stainless steel is used in corrosive sections to withstand acidic gases. Refractory linings protect against high temperatures, and PTFE/fiberglass filter fabrics handle particulate filtration.

### Q: How does the system handle varying gas volumes and temperatures from steelmaking operations?
**A**: The system includes a quench tower for rapid gas cooling, adjustable ID fans for volume control, and temperature-resistant components that maintain efficiency across the operational range of steelmaking exhaust conditions.

## 6. Manufacturing Compliance
- ISO 8573-1:2010 (COMPRESSED AIR PURITY CLASSES AND CONTAMINANTS)
- ANSI/ASME B31.3:2022 (PROCESS PIPING DESIGN AND CONSTRUCTION)
- DIN EN 1092-1:2018 (FLANGES AND THEIR JOINTS FOR PIPING SYSTEMS)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Off-gas Cleaning System](https://cnfx.com/industry/basic-metal-manufacturing/product/off-gas-cleaning-system)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **5** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: OFF_GAS_CLEANING_SYSTEM | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: f393d95d
