Chemical Industry

The chemical industry,due to its complex processes,diverse materials and high potential risks,has extremely strict requirements for environmental and safety monitoring.

Part One:Gas Detection Solutions

The gas risks in the chemical industry are mainly classified into three categories:flammable gases,toxic gases,and oxygen concentration.

I. Monitoring scenes and target objects

Production facility area (reactors, towers, pipelines)

Target substances: raw materials, intermediates, product vapors. For example: benzene series substances, chlorine, ammonia, hydrogen sulfide, VOCs (volatile organic compounds).

Key point: Leakage monitoring.

Storage tank area

Target: Steam for storing materials. For example: benzene, toluene, xylene, propylene, liquefied petroleum gas, etc.

Key points: Leakage monitoring and regional safety protection.

Sewage treatment plant/waste gas treatment device

Target substances: hydrogen sulfide, ammonia, methane, VOCs.

Key points: Safety of workers and monitoring of fugitive emissions.

Laboratory, research and development center

Target substances: Various experimental gases and solvent vapors.

Key points: Environmental safety and personnel health.

The factory boundary and its perimeter

Target substances: Characteristic pollutants (such as VOCs, malodorous gases).

Key point: Environmental compliance to prevent any impact on the surrounding communities.

Ii. Detection Technology and Equipment Selection

Fixed gas detector

Technical principle

Catalytic combustion (LEL) : Used for combustible gases.

Electrochemistry (EC) : It is used for toxic gases (H₂S,CO,Cl₂,NH₃, etc.) and has high sensitivity.

 Infrared (IR) : Used for VOCs and hydrocarbons, it is anti-toxic, has a long service life, and is suitable for oxygen-deficient environments.

Photoionization (PID) : It is used for wide-range detection of VOCs, especially suitable for low-concentration leakage.

Deployment: Install sensors at key risk points and connect the data to the central control system.

Portable/handheld gas detector

Usage: Inspection, entry into confined Spaces, emergency response, and leakage point investigation.

Part Two: Water Quality Testing Solutions

 Chemical water quality monitoring covers the entire process from influent, process, wastewater treatment to discharge.

Monitoring points and key indicators

Incoming water (raw water/tap water)

Indicators: pH, turbidity, residual chlorine, conductivity.

Objective: To ensure that the quality of water sources meets production requirements.

Process water

Indicators: Related to specific processes, such as the concentration of specific ions (Cl⁻,F⁻,Na⁺), organic matter content (COD/TOC), pH, temperature, etc.

Objective: To monitor reaction efficiency and ensure product quality.

Boiler feed water/circulating cooling water

Indicators: Electrical conductivity, pH, dissolved oxygen, hardness.

Objective: To prevent scaling, corrosion and microbial growth, and ensure the safe operation of equipment.

Wastewater treatment unit

Pretreatment unit: pH, flow rate

Biochemical treatment unit (A/O tank) : DO (Dissolved Oxygen), MLSS (Suspended solids in mixed liquid), ORP (Oxidation-reduction potential), temperature, ammonia nitrogen, nitrate nitrogen.

Discharge outlet

Conventional indicators: pH, chemical oxygen demand (COD), ammonia nitrogen (NH₃-N), total nitrogen (TN), total phosphorus (TP), suspended solids (SS), flow rate.

Ii. Detection Technology and Equipment Selection

Online water quality analyzer

Necessity: Achieving 24/7 continuous monitoring is a standard feature of modern chemical water management.

Common types

pH/ORP/ conductivity/dissolved oxygen analyzer: Fundamental and crucial.

COD online analyzer: Ultraviolet (UV) method is used for rapid early warning, and chemical method (potassium dichromate) is used for precise measurement and compliance.

TOC (Total Organic Carbon) analyzer: Rapidly reflects the degree of organic pollution in water bodies.

Specific ion online analyzers: such as fluoride ion, chloride ion analyzers, etc.