Case Background
Against the backdrop of regular national ecological and environmental inspections, refined pollutant discharge permit management and full implementation of dual-carbon controls, supervision over industrial waste gas emissions has shifted from "end-of-pipe spot sampling" to "full-time, full-point and full-process intelligent management and control". Environmental waste gas scenarios fall into two main categories: organized fixed emissions (exhaust stacks, boilers, desulfurization and denitrification, RTO incineration) and unorganized plant boundary emissions (workshop fugitive emissions, pipeline leakage, material volatilization), covering chemical, coating, printing, pharmaceutical, steel, waste incineration, power and other industries. In accordance with the Atmospheric Pollution Prevention Law, Technical Specifications for Emission Monitoring of Stationary Pollution Sources and Standard for Unorganized Emission Control of VOCs, the core industry pain points and rigid requirements are as follows:
1.1 Complex Emissions of Multiple Pollutants with High Over-limit Risks and Difficult Traceability
Industrial waste gas has complex components including pollutants such as SO₂, NOₓ, CO, VOCs, ammonia, hydrogen sulfide, odor concentration and soot, accompanied by greenhouse gas emissions such as methane and carbon dioxide. Fluctuations in production load, failure of treatment equipment, deactivated activated carbon, abnormal RTO temperature and insufficient desulfurization and denitrification agents easily lead to transient and intermittent emission exceedances. Traditional manual quarterly and monthly spot sampling cannot capture transient over-limit operating conditions. Once emissions exceed limits, root causes cannot be quickly located, which may easily trigger environmental penalties, public complaints and production suspension for rectification.
1.2 Lack of Unorganized Fugitive Emission Control, a Major Weakness in Environmental Inspections
The focus of current environmental inspections has shifted from organized stack emissions to unorganized fugitive emissions at plant boundaries, workshops, tank farms and loading/unloading areas. Material volatilization, flange leakage, aging valves and minor pipeline leaks cause escape of VOCs and odorous gases, resulting in excessive concentrations at plant boundaries and complaints from nearby residents. Most enterprises lack fixed monitoring instruments and rely merely on manual patrols and smell judgment, leading to an extremely high missed detection rate. This constitutes a core pain point causing environmental deduction points and credit downgrade for enterprises.
1.3 Monitoring Data Requires Compliant Network Access, Authenticity and Traceability
Online monitoring devices must be installed at exhaust stacks of stationary pollution sources and connected to environmental protection platforms. Data must be continuous, authentic, valid and tamper-proof to avoid data loss, drift, transmission interruption and false data. Meanwhile, enterprises need to retain complete monitoring ledgers, curves and alarm records for pollutant discharge permit verification, environmental acceptance and credit evaluation. Conventional outdated equipment suffers from poor precision and severe data fluctuation and cannot access the network, which readily results in point deductions for abnormal data and non-compliance.
1.4 Harsh Operating Conditions Require Extremely High Equipment Stability
Waste gas outlets are generally exposed to harsh conditions such as high temperature, high humidity, heavy dust, acid-alkali corrosion and oil-gas adhesion, which easily cause sensor poisoning, pipeline blockage, data drift and frequent equipment failures. Ordinary civilian detectors cannot operate stably for a long time. Frequent calibration and maintenance bring high operation and maintenance costs and severe data gaps.
1.5 Passive Treatment Mode Fails to Achieve Carbon Reduction, Cost Reduction and Efficiency Improvement
Most enterprises only maintain the bottom line of non-exceedance and cannot optimize treatment processes through data. Treatment equipment runs at full load for a long time with high energy consumption and serious waste of consumables. Without data support, air volume, chemicals and incineration temperature cannot be precisely adjusted. Integrated management of emission reduction, energy saving and cost reduction cannot be realized, making it difficult to meet dual-carbon control and ultra-low emission upgrading requirements.
Taizhi Solutions
Targeting five major pain points of environmental waste gas emission including organized emission exceedance, unorganized fugitive emissions, non-compliant data, unstable equipment and imprecise treatment, this solution builds a four-in-one full-process waste gas monitoring system integrating CEMS/TVOC online monitoring for stationary pollution sources, grid-based monitoring of unorganized emissions at plant boundaries, portable inspection and traceability, and big-data intelligent management platform. It fully covers end-of-pipe treatment of exhaust stacks, workshop process control, plant boundary prevention and leakage source tracing, realizing closed-loop management featuring real-time monitoring of waste gas pollutants, over-limit early warning, intelligent analysis, precise treatment, compliant network access, carbon reduction and efficiency improvement.
2.1 Overall ArchitectureThe solution adopts hierarchical management while balancing compliance, stability, practicality and intelligence:
End Emission Monitoring Layer: Online monitoring devices are deployed at exhaust outlets of boilers, incinerators, desulfurization and denitrification stacks, coating waste gas and organic waste gas discharge ports to monitor parameters such as SO₂, NOₓ, VOCs, particulate matter, temperature, pressure, flow and humidity in real time and meet compliance requirements for environmental network connection.
Plant Boundary Grid Monitoring Layer: Miniature monitoring stations are arranged at plant boundaries, tank farms, workshop air outlets and loading/unloading points to realize grid deployment for unorganized VOCs, odor and toxic gas monitoring and accurately capture points with fugitive emission exceedance.
Mobile Traceability & Inspection Layer: High-precision portable gas detectors are equipped for routine inspection, leakage point screening, over-limit traceability, third-party comparison and equipment calibration re-detection to quickly locate leakage sources and abnormal treatment points.
Intelligent Platform Management Layer: It aggregates all monitoring data to realize real-time display, curve analysis, AI prediction, over-limit alert push, data retention, automatic report generation and docking with environmental protection platforms, supporting refined treatment and compliance management for enterprises.
2.2 Core Concept of the SolutionAdhering to the core logic of "ensuring compliance at end outlets, preventing fugitive emissions via process control, identifying hidden dangers through mobile traceability and reducing costs empowered by data", the system meets mandatory compliance requirements for environmental inspections, pollutant discharge permits and online network access. Meanwhile, it optimizes waste gas treatment processes through big data analysis to deliver multiple values including compliance, safety, energy conservation and carbon reduction.
Impl. Results
3.1 Eliminate Environmental Over-limit Penalties and Achieve 100% Qualified Emissions
The system provides 7×24-hour uninterrupted continuous monitoring of waste gas pollutants, completely eliminating blind spots of traditional manual spot sampling and missed transient exceedances. It realizes early risk prediction and second-level over-limit alarms for hidden hazards caused by production fluctuations, treatment equipment failure and expired consumables. Verified by multiple practical projects, the solution maintains a stable 100% compliance rate of waste gas emissions, thoroughly avoids transient and intermittent over-standard emissions, and effectively prevents environmental fines, production suspension rectification, credit downgrades and complaint accountability, reducing annual compliance losses by over one million RMB for a single enterprise.
3.2 Precisely Control Unorganized Fugitive Emissions and Eliminate Core Inspection Risks
Combining plant boundary grid monitoring with portable traceability detection, the system accurately locates unorganized emission hazards such as workshop volatilization, micro pipeline leakage, tank area fugitive emissions and loading and unloading diffusion, solving the industry dilemma of invisible, untraceable and uncontrollable fugitive pollutants. It precisely identifies local high-concentration accumulation areas and guides targeted leakage blocking, airtight optimization and air volume adjustment, greatly reducing plant boundary odor and VOC escape. It eliminates resident complaints and unorganized emission deduction risks, enabling enterprises to stably maintain A-level environmental credit evaluation.
3.3 Ensure Accurate and Stable Monitoring Data to Fully Meet Network Compliance Requirements
Equipped with a professional pretreatment system featuring high-temperature heat tracing, dust and humidity removal, oil removal and anti-interference design, the devices adapt to harsh exhaust conditions of high temperature, high humidity and heavy dust, effectively preventing sensor poisoning, data drift and value fluctuation. The deviation between system data and third-party detection is controlled within 8%, far better than conventional industry standards. With true, stable and valid data, the system stably connects to local environmental supervision platforms, avoiding compliance problems such as transmission interruption, data abnormality, zero-value failure and red alarms, and supports one-time pass of environmental acceptance, pollutant discharge permit verification and special inspections.
3.4 Intelligently Optimize Treatment Processes and Greatly Reduce O&M Energy Costs
Based on big-data concentration curve analysis, the platform accurately matches production load with waste gas concentration fluctuations, intelligently guiding chemical dosing for desulfurization and denitrification, RTO temperature adjustment, fan frequency conversion control and activated carbon replacement cycle optimization. It completely changes the traditional inefficient full-load operation mode. Practical tests prove that it reduces waste gas treatment energy consumption and consumable costs by 15%–30%. Meanwhile, it optimizes recovery processes through precise emission control, improving waste gas medium recovery efficiency in some industries and bringing additional benefits with remarkable cost reduction and efficiency improvement.
3.5 Realize Pre-warning Management and Transform from Passive Rectification to Active Prevention
Built with an AI intelligent prediction model, the system predicts pollutant over-limit trends based on historical data, production conditions and ambient temperature changes, and triggers pre-alarms near threshold values for staff to adjust production and treatment processes in advance. It thoroughly changes the passive post-penalty rectification mode and realizes proactive risk prevention. Full-cycle monitoring data, alarm logs and operation records are completely retained to support rapid traceability and closed-loop review during inspections and emergencies, significantly improving enterprise environmental emergency management capability.
3.6 Support Dual-carbon Management and Realize Green Low-carbon Production
The system synchronously and accurately monitors greenhouse gas emissions such as methane and carbon dioxide, establishes enterprise carbon emission ledgers, and precisely calculates total emissions and emission intensity. It provides authentic and valid data support for enterprise carbon accounting, carbon trading, energy-saving renovation and ultra-low emission upgrading, helping enterprises complete dual-carbon assessments and green factory certification successfully.
Solution Value
4.1 Compliance Value: Consolidate Environmental Bottom Line and Avoid Major Operational Risks
Fully complying with national and local specifications for waste gas emission, VOCs management, unorganized emission treatment and online monitoring networking, the solution achieves full-dimensional compliance for both organized and unorganized emissions. It eliminates hidden risks in environmental inspections, avoids operational risks such as fines, production suspension, production restriction and credit downgrade, and ensures continuous and stable production.
4.2 Cost Value: Achieve Precise Cost Reduction and Reduce Invalid Energy Consumption
Data-enabled refined treatment optimizes the consumption of chemicals, electricity, consumables and labor O&M costs, greatly cutting operational expenses of waste gas treatment. It reduces indirect losses caused by equipment shutdown and over-limit rectification, improves production continuity and creates direct economic benefits for enterprises.
4.3 Management Value: Realize Digital Upgrading and Standardize Environmental Management
Replacing traditional manual inspection, paper ledgers and manual statistics, the system realizes full-process digitalization and automation of monitoring, early warning, traceability, report generation and maintenance. It unifies enterprise environmental management standards, solves problems such as extensive management, delayed hazard disposal and disordered records, and promotes intelligent and refined upgrading of environmental governance.
4.4 Brand Value: Enhance Environmental Credit and Industrial Competitiveness
Stable emission compliance, complete environmental management systems and superior plant boundary environment effectively improve enterprise environmental credit ratings. It supports applications for green factory, low-carbon enterprise and environmental benchmark certification, creates advantages in bidding, industry evaluation and policy support, and strengthens core enterprise competitiveness.
4.5 Social Value: Reduce Pollution Emissions and Fulfill Green Production Responsibilities
Precise control of air pollutants and greenhouse gas emissions significantly reduces unorganized atmospheric diffusion and surrounding environmental impact, minimizing resident complaints. It helps enterprises establish a green and environmentally friendly social image and fulfill ecological and environmental social responsibilities.
Equip. Intro
The equipment of this solution is specially developed for waste gas conditions featured by high temperature, high humidity, heavy dust, corrosion and volatile substances. It falls into four categories: online monitoring devices for stationary pollution sources, miniature plant-boundary monitoring devices, portable traceability detectors and intelligent management platform, fully meeting requirements of environmental compliance and treatment optimization.
5.1 Flue Gas / CEMS Online Monitoring System for Stationary Pollution Sources Suitable for organized emission monitoring of boilers, incinerators, desulfurization & denitrification facilities and industrial exhaust stacks. Adopting high-temperature extraction pretreatment technology and high-precision infrared and ultraviolet detection principles, it performs real-time and accurate measurement of full parameters including SO₂, NOₓ, CO, particulate matter, oxygen, temperature, pressure, flow and humidity. Equipped with full-process high-temperature heat tracing, dust & moisture removal, anti-corrosion and anti-interference capabilities, it eliminates the impact of water vapor and dust on measurement accuracy with stable data and low drift. It supports data upload via standard environmental protection protocols, with traceable and tamper-proof data. Fully compliant with requirements for environmental acceptance, online monitoring and ultra-low emission supervision, it applies to high-temperature flue gas scenarios in power, steel, waste incineration, cement and other industries.
5.2 VOCs Online Monitoring System (Dual Principle: FID / PID) Specially designed for organic waste gas scenarios such as coating, printing, pharmaceutical and chemical industries. The GC-FID hydrogen flame ionization principle is used for high-precision total quantity monitoring, while the PID photoionization principle delivers rapid early warning. It accurately measures TVOC, non-methane total hydrocarbons and characteristic pollutants. Equipped with multi-stage pretreatment, anti-condensation and anti-oil-mist clogging design, it solves typical problems of organic waste gas including adhesion, condensation and sensor poisoning. With accurate and stable monitoring data, it can seamlessly connect to local environmental protection platforms to satisfy demands of VOCs discharge permit, total mass accounting and emission compliance control.
5.3 Miniature Air Monitoring Station for Unorganized Plant-boundary Emissions Applied to grid-based monitoring at plant boundaries, tank farms, workshops and material loading/unloading zones. It monitors parameters such as VOCs, hydrogen sulfide, ammonia, odor concentration, PM2.5, PM10, temperature and humidity in real time. Featuring compact size, easy installation, low power consumption and high protection rating, it supports 4G/5G wireless transmission without complicated construction. It accurately captures hidden risks of unorganized fugitive emissions and excessive odor. Combined with the platform’s grid positioning function, leakage zones can be rapidly located, making it standard core equipment for current unorganized emission control.
5.4 Portable High-precision Waste Gas Detector For routine inspection, leakage traceability, over-limit re-verification and third-party comparative acceptance. Lightweight, fast response and high precision, it can be equipped with measurement modules for SO₂, NOₓ, CO, VOCs, H₂S, NH₃ as required. Built with precision sampling pump and filtering pretreatment structure, it resists interference from on-site dust and water vapor to guarantee stable and reliable data. It supports data storage, export and traceability comparison, enabling rapid investigation of pipeline leakage, abnormal treatment equipment and local over-limit hazards, serving as a core tool for fixed-point traceability and hazard inspection.
5.5 Intelligent Cloud Platform for Environmental Waste Gas Monitoring The platform supports data access from all terminal monitoring devices. Core functions include real-time data monitoring, concentration curve analysis, AI over-limit prediction, multi-level alarm push, automatic equipment fault diagnosis, historical data traceability, automatic generation of environmental ledgers and reports, data interconnection with environmental authorities and carbon emission statistics. It supports remote multi-terminal access, with data stored permanently on cloud and tamper-proof. Fully meeting requirements of environmental inspections, pollutant discharge declaration, data traceability and dual-carbon accounting, it realizes intelligent closed-loop management for the whole waste gas treatment process of enterprises.
