Introduction To Industry Scenarios
The core of the thermal network is the entire process of the heat source (thermal power plant/boiler) → primary network → heat exchange station → secondary network → user. The medium is high-temperature hot water (120-150 ℃), steam, and condensate. Its characteristics include high temperature, high pressure, large pipe diameter, long distance, multiple branches, hydraulic imbalance, high risk of leakage, large temperature difference at the end, and seasonal operation.
Key measuring points:
Heat source/heat exchange station: supply and return water temperature, pressure, pressure difference, flow rate, water tank/softened water level/primary/secondary pipeline network: main/branch line pressure, temperature, pressure difference, pressure before and after valve group
Thermal power station: inlet and outlet pressure/temperature of heat exchanger, inlet and outlet pressure of circulating pump, liquid level of make-up water tank
At the end of the pipeline network: user side pressure, temperature, and household metering flow
Underground pipeline network: well chamber liquid level, leakage monitoring pressure/liquid level
Adapt to Core Products
QDY30A High Temperature Input Type Liquid Level Transmitter (150 ℃ Hot Water/Condensed Water)
QDKG high temperature pressure switch/transmitter (150-200 ℃ hot water/steam)
GLG signal isolator/RS485 isolator (long-distance pipeline signal transmission)
S803/SS803 intelligent digital display instrument (local display, alarm, interlock for heat exchange station/pipeline network)
QDW90A-3051 flange level transmitter (for softened water tank and condensate tank in heat exchange station)
Product Function
QDY30A/QDW90A liquid level class
Heat exchange station softened water tank/make-up water tank/condensate water tank liquid level: Real time monitoring of water level, linkage of make-up water pump automatic make-up water, high liquid level overflow alarm, low liquid level interlock pump stop, ensuring system water side stability and preventing dry burning.
Underground pipe network well/collection pit liquid level: IP68 protection, long-term immersion, monitoring of accumulated water level, linkage of drainage pumps to prevent pipe network flooding and equipment damage.
High temperature condensate/hot water tank: resistant to high temperatures of 150 ℃, made of 316L stainless steel, resistant to scaling and corrosion, and capable of long-term stable measurement.
QDKG high temperature pressure switch/transmitter
Primary/secondary supply and return water pressure/pressure difference of the pipeline network: High precision of 0.075 level, temperature resistance of 200 ℃, real-time monitoring of pipeline network pressure, linkage circulation pump frequency conversion regulation, valve group opening control, balancing the hydraulic power of the entire network, eliminating "near heat far cold".
Inlet and outlet pressure of heat exchanger: Monitor the pressure difference, determine the blockage/scaling of the heat exchanger, provide early warning for cleaning, and ensure heat exchange efficiency.
Pipeline leakage monitoring: pressure sudden change alarm, quickly locate leakage points, reduce water and heat loss.
Overpressure protection: Overpressure interlock closes valves and stops pumps to prevent pipe bursting and equipment damage in the pipeline network.
GLG signal isolator/RS485 isolator
Long distance pipeline network (several kilometers) signal transmission: RS485+Modbus, anti-interference and anti attenuation, ensuring stable uploading of pressure/temperature/liquid level signals to the dispatch center without packet loss or delay.
Heat exchange station strong electromagnetic interference (frequency converter, circulating pump): 2500V isolation, cutting off the ground loop, suppressing common mode interference, preventing DCS/SCADA signal drift and false alarms.
S803/SS803 digital display instrument
Local display of heat exchange station: high brightness LED, real-time display of supply and return water pressure/temperature/liquid level, convenient for inspection and on-site operation.
Alarm/Interlock: Upper and lower limit alarm, relay output, driving sound and light alarm, linkage pump/valve, realizing unmanned heat exchange station.
Data accumulation/communication: Accumulate traffic/heat, upload to the dispatch center, achieve household metering, energy consumption statistics, and heat cost settlement.
Addressing Industry Issues
Serious hydraulic imbalance
The pipeline network is long and has multiple branches, with near heating and far cooling, uneven heating and cooling, multiple user complaints, and significant energy waste (imbalance loss of 20% -30%).
High leakage and water loss rate
The underground pipeline network is aging and has many joints, making it difficult to detect leaks in a timely manner. The water loss rate is high (5% -15%), resulting in significant heat loss and high water replenishment costs.
High energy consumption and low efficiency
Inaccurate pressure/temperature control, scaling of heat exchangers, large heat dissipation losses in pipeline networks, high energy consumption of heat sources, high coal/gas consumption, and high heating costs.
High labor costs and extensive management
There are many heat exchange stations, widely distributed, and manual inspections, meter readings, and adjustments are inefficient and slow to respond, making it impossible to achieve refined scheduling.
Safety risks
Overpressure bursting of high temperature and high pressure pipeline network, scalding caused by hot water leakage, frost cracking (low temperature in winter), affecting people's livelihood and safety.
Direct Customer Benefits
Energy saving benefits (core)
Hydraulic balance optimization: precise pressure/pressure difference control, eliminating near heating and far cooling, saving 15% -25% energy for the entire network, saving steam/hot water costs of ≥ 3 million yuan per year for a heating area of 3 million square meters.
Efficiency improvement of heat exchanger: pressure difference monitoring, warning and cleaning, heat exchange efficiency increased by 10% -15%, reducing heat source energy consumption by ≥ 10%.
Pipeline leakage reduction: Pressure mutation alarm quickly locates leaks, reduces water loss rate to ≤ 3%, and reduces annual water replenishment/heat loss costs by ≥ 500000 yuan.
Security and stability benefits
Overpressure interlock protection: prevents pipe bursting and equipment damage in the pipeline network, reduces accidents and shutdowns by ≥ 90%, and ensures stable heating in winter.
Low temperature antifreeze: liquid level/pressure monitoring linked circulation pump to prevent pipeline freezing and cracking, reducing winter repair costs by ≥ 80%.
Unmanned: With intelligent instruments and interlocking, the unmanned rate of the heat exchange station is 100%, and the safety accident rate is reduced by ≥ 80%.
Management and cost-benefit analysis
Labor cost reduction: remote monitoring+automatic adjustment, reducing manual inspection/meter reading by ≥ 70%, saving labor costs of ≥ 300000 yuan annually.
Maintenance cost reduction: instrument stability, low failure rate, reduced annual maintenance costs by ≥ 50%, reduced spare parts/maintenance expenses by ≥ 200000 yuan, Heilongjiang Provincial Government Procurement Network.
Data refinement: Real time data+cumulative measurement, achieving precise billing by household, energy consumption traceability, fault analysis, and improving management efficiency by ≥ 50%.
Livelihood and Brand Revenue
Improvement of heating quality: hydraulic balance, temperature stability, reduction of user complaints by ≥ 90%, increased satisfaction, and enhancement of corporate brand.
Environmental compliance: Reduce energy consumption and emissions, meet ultra-low emission requirements for environmental protection, avoid fines, and fulfill social responsibilities.
