Transfer of second-hand plate heat exchangers

Transfer of second-hand plate heat exchangers

Company Introduction

Liangshan County DeDe Second hand Equipment Purchase and Sales Department provides long-term supply of second-hand drying equipment, second-hand domestically imported disc separators, second-hand heat-conducting oil furnaces, second-hand horizontal spiral centrifuges, second-hand plate and frame filter presses, second-hand horizontal scraper centrifuges, and second-hand horizontal two-stage piston pushing centrifuges Used bundle dryer, used flash dryer, used enamel reaction kettle, used stainless steel reaction kettle, used stainless steel tube condenser, etc., used stainless steel cold and hot cylinders, used high-pressure homogenizer, used dairy equipment, used beverage equipment, edible oil processing plant, feed processing plant, alcohol plant, dairy plant, food protein plant, beverage plant complete set of production equipment

dehangershouhuagongshebei-miaoyuanyuan

Transfer of second-hand plate heat exchangers

Plate heat exchanger is an efficient and compact heat exchange device widely used in industries, buildings, energy and other fields. It achieves rapid heat transfer through the flowing medium between metal plates. The following is a detailed introduction about plate heat exchangers:

1、 Structure and Working Principle

Core components:

Corrugated sheet: made of stainless steel, titanium alloy and other materials, with a corrugated surface stamped to increase heat transfer area and turbulence effect.

Sealing gasket: Made of rubber or polymer material, it seals the gaps between the plates and guides the flow path of the medium.

Framework: The clamping plate, guide rod, and bolt that fix the plate are used to withstand system pressure.

Workflow:

Cold and hot media flow in opposite directions within the channels formed by adjacent plates.

The corrugated structure enhances turbulence, destroys the boundary layer, and significantly improves heat transfer efficiency.

Heat is rapidly conducted through thin metal plates to achieve heat exchange between cold and hot media.

2、 Main features and advantages

Efficient heat transfer:

The heat transfer coefficient is high (up to 3000-7000 W/(m ² ·℃)), which is 3-5 times that of shell and tube heat exchangers.

The corrugated plate design significantly increases the effective heat transfer area.

Compact and energy-saving:

Small in size and light in weight, occupying only 10% -30% of the space of a shell and tube type.

Low flow resistance and reduced pumping energy consumption.

Flexible and adjustable:

Adapt to different flow and temperature requirements by increasing or decreasing the number of plates or adjusting the combination of flow channels.

Multi pass design can handle working conditions with large temperature differences.

Easy maintenance:

Modular structure, easy to disassemble and clean, suitable for media that are prone to scaling.

Single board damage can be replaced separately to reduce maintenance costs.

3、 Application Fields

Heating, Ventilation, and Air Conditioning (HVAC):

District heating, cooling circulation system, heat pump unit.

Waste heat recovery (such as heat exchange between exhaust and fresh air).

Industrial process:

Chemical industry: reactor heating/cooling, solvent recovery.

Food: Pasteurization, fruit juice cooling, dairy processing.

Pharmaceutical: Purified water system, fermentation tank temperature control.

Energy and Environmental Protection:

Power plant waste heat utilization and geothermal system.

Heat exchange in wastewater treatment.

Ships and Transportation:

Engine cooling and lubricating oil heat dissipation.

Thermal management of electric vehicle batteries.

4、 Classification and selection

Common types:

Detachable: Suitable for frequent cleaning or conditions prone to scaling.

Brazing type: Plate brazing sealing, high pressure resistance, no gasket, suitable for refrigeration systems.

Fully welded: no gasket design, high temperature and high pressure resistance, used for corrosive media.

Key parameters for selection:

Media properties (corrosiveness, viscosity, particle content).

Working temperature and pressure.

Flow rate, temperature difference, and allowable pressure drop.

Material selection (such as titanium plate required for seawater environment).

5、 Limitations and precautions

Applicable restrictions:

The medium containing large particles or fibers is prone to clogging the flow channel.

Special structures (such as fully welded) are required for high-temperature and high-pressure working conditions.

Rubber gaskets are not resistant to organic solvents or high temperatures (usually ≤ 180 ℃).

Maintenance requirements:

Regularly check the aging condition of the gasket to prevent leakage.

Hard water or easily scaling media require chemical cleaning or softening pretreatment.