Application of Solidot C2S Series PROFINET Bus Valve Island in Industrial Pollution Control Systems

Industrial pollution control is one of the core areas of the environmental protection industry. Its process flow covers multiple stages such as exhaust gas purification, wastewater treatment, and solid waste recovery, placing extremely high demands on the stability, response speed, and device integration of automation control. Traditional pneumatic and electrical control solutions have gradually exposed many drawbacks when dealing with complex process flows and frequent maintenance requirements, while the fieldbus valve terminal, with its simple wiring and convenient commissioning, provides another efficient and reliable solution for industrial pollution control systems.

Solidot products used in this case study: C2S-PN-10B-S01

I. Production process introduction

The customer is an environmental protection enterprise company focused on industrial pollution control. The core processes of its intelligent industrial pollution control system include: exhaust gas treatment, wastewater treatment, and solid waste management.

(1) Exhaust gas treatment

Collection and pretreatment: exhaust gas is collected through fans and duct systems, and the spray system precisely controls water flow switching and flow rate to remove particulate matter and some harmful gases.

Adsorption and catalysis: the inlet and outlet valves of the activated carbon adsorption tank are switched according to the process sequence to ensure adsorption efficiency; the catalytic reactor valves dynamically adjust gas flow rate and temperature to ensure sufficient reaction.

Compliant emission: real-time regulation of the exhaust valve opening ensures that emission parameters meet environmental standards.

(2) Wastewater treatment

Stage-by-stage purification: the sedimentation tank and bioreactor are controlled in a coordinated manner through pumps and valves, adjusting the water flow path and treatment intensity based on feedback from pH and turbidity sensors.

Resource recovery: valves in the membrane separation system are controlled to enable the recovery and reuse of valuable components in wastewater.

(3) Solid waste management

Sorting and conveying: pneumatic valves control the solid waste sorting path, precisely directing it to incineration, landfill, or resource recovery units.

II. Application mode of the fieldbus valve terminal

The system uses the PROFINET protocol, with the C2S-PN-10B-S01 connected to a Siemens S7-300 series PLC to implement the following functions:

Exhaust gas treatment valve control: controls the water flow valve of the spray system and the inlet/outlet switching valves of the adsorption tank, opening and closing precisely according to the preset sequence, and dynamically adjusts the gas flow rate valve of the catalytic reactor.

Wastewater treatment interlock control: drives the bioreactor inlet and drain valves and, combined with water quality parameters, achieves dynamic flow regulation; controls the valves of the membrane separation system and supports multi-channel parallel operation.

Solid waste sorting path management: uses a 10-position double solenoid valve to drive the pneumatic sorting valves, enabling rapid switching of the solid waste conveying direction.

3. Optimization results of the Solution

Compared with the pain points of the customer's original conventional solenoid valve control solution, such as complex wiring, difficult maintenance and poor scalability, the Solidot C2S series PROFINET Fieldbus Valve Terminal C2S-PN-10B-S01 uses a bus-based design to significantly improve the system's wiring efficiency and maintainability. The specific optimizations are as follows:

Simple wiring: the bus supports M12 connector connection and expansion, and the 10-position double solenoid valve is integrated on a single valve terminal module, eliminating the separate wiring of each solenoid valve in the conventional solution and significantly reducing the amount of wiring.

Improved operation and maintenance efficiency: the Indicator displays the device's Operational state in real time, helping to quickly identify anomalies; it supports channel short circuit and open circuit diagnostics for precise fault location, greatly shortening troubleshooting time.

The customer is highly satisfied with Solidot's Fieldbus Valve Terminal solution and has already applied it in its latest generation of environmental protection equipment, driving and realizing the enterprise's transformation to intelligent manufacturing.