Product Definition: Core equipment for temperature control in industrial processes
Process water heat exchange units are integrated heat exchange systems specifically designed for industrial production processes, with the core objective of precisely controlling the temperature, flow rate, and pressure of the process medium (mainly process water).By properly matching components such as heat exchangers, pump sets, valves, and control systems, efficient transfer, recovery, and utilization of cold and heat in the process can be achieved. It is not limited to the type of heat exchange medium.It can be adapted to various heat exchange modes such as water-water, water-steam, and water-heat transfer oil according to working conditions, and is a key piece of equipment in industrial production to ensure proces stability and improve energy utilization.
Product Features: Adaptable to process requirements, balancing high efficiency and reliability
Product Functions: Ensuring Stability of the Process in All Dimensions
Precise temperature control
:Heat transfer through heat exchangers and closed-loop regulation of the control system.The process water temperature is stabilized within a set range to meet the stringent temperature requirements of processes such as reaction, distillation, drying, and cooling.
01
Flow and pressure matching:
According to changes in process load, the variable frequency pump set automatically adjusts the output flow rate and works with the pressure regulating valve to maintain stable system pressure, avoiding abnormal process parameters due to flow fluctuations.
02
Media purification and protection;
Some models integrate a filtration system to remove impurities and suspended solids from the process water, preventing heat exchanger clogging; they can also be paired with corrosion inhibition and descaling systems to extend the service life of the equipment and process piping.
03
Waste heat recovery and utilization:
For waste heat resources such as high-temperature process wastewater and exhaust gas, heat exchange units are used to recover heat to heat low-temperature process water, replacing some traditional heat sources such as steam and electric heating, thereby reducing production energy consumption and operating costs.
04
Emergency support functions
Equipped with a backup pump set and a manual adjustment mode, it can quickly switch to emergency operation mode in the event of an automatic system failure, avoiding losses caused by process interruption.
05
Application Site
Industrial production
Chemical, petroleum, power (thermal/nuclear), metallurgical, pharmaceutical, and food processing workshops, used for heating/cooling process media.
Building Supporting Facilities
Central heating/cooling systems for large shopping malls, office buildings, and residential communities; hot water supply stations for hospitals and schools.
Special scenarios
Data center cooling systems, wastewater treatment plant temperature control processes, and thermal management components for new energy (photovoltaic/wind power)
Core Components and Functional Analysis
Process water heat exchangers are integrated thermal devices. Their core components work together to achieve heat transfer and system stability. Key components include:.
Heat exchangers
core heat transfer elements. Common types include plate heat exchangers (high efficiency, compact, easy to disassemble and clean, suitable for small to medium flow conditions) and shell-and-tube heat exchangers (resistant to high pressure and high temperature, highly adaptable, mostly used for high flow rates or media containing particles).Spiral plate heat exchanger (low flow resistance, high heat transfer efficiency, suitable for viscous process water).Its function is to complete the heat exchange between process water and secondary media (such as hot water and cold water) through indirect contact between hot and cold media.
Circulation pump:
Providing power for process water flow, pumps are divided into variable frequency pumps and fixed frequency pumps. Variable frequency pumps can automatically adjust their speed according to load changes, reducing energy consumption and are suitable for scenarios with large load fluctuations (such as temperature control in chemical reactors).Fixed-frequency pumps have a simple structure and low cost, making them suitable for stable load conditions.
Temperature control device;
Includes a temperature sensor, regulating valve, and PLC control system. The sensor monitors the inlet and outlet temperatures of the process water in real time and transmits the signals to the PLC.By adjusting the flow rate of the heat transfer medium/cooling medium (such as the opening degree of the steam valve and the cold water valve), the process water temperature is ensured to be maintained within the set range (the accuracy is usually ±1℃).
Filter
To intercept impurities (such as rust and particulate matter) in process water, prevent heat exchanger clogging, and extend equipment life, the filter screen precision is typically 50-100 mesh
Expansion tank
:To absorb the volume expansion of process water during heating, balance system pressure, and prevent pipeline overpressure. Safety valves, pressure gauges, and thermometers are used for system safety protection and operational status monitoring
Operation, maintenance, and troubleshooting
Regular cleaning
Plate heat exchangers should be disassembled and cleaned every 3-6 months, while shell-and-tube heat exchangers can be cleaned with chemicals (such as citric acid solution) or flushed with high-pressure water to remove scale and impurities..
Parameter monitoring：
Monitor the inlet and outlet temperatures, pressures, and flow rates in real time. If the temperature difference decreases or the pressure loss increases, it may indicate that the heat exchanger is blocked and needs to be addressed promptly.
Lubrication and maintenance:
Lubricate the circulating pump bearings every 6-12 months and check for leaks in the seals
Common faults and solutions:
Heat exchange efficiency decreases
The causes may include scaling, air blockage in the heat exchanger, or insufficient valve opening.Solution: Clean the heat exchanger, vent the air from the exhaust valve, and adjust the valve opening to a reasonable range;
Unstable system pressure
The cause may be insufficient pressure in the expansion tank or a pipeline leak; solutions:Replenish nitrogen pressure in the expansion tank, locate and repair any leaks;
The pump unit vibrates and makes a lot of noise
The cause may be impeller imbalance or loose foundation;Solution: Correct the impeller and tighten the foundation bolts.
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