Long term transfer of second-hand tube heat exchangers

Long term transfer of second-hand tube 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

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Long term transfer of second-hand tube heat exchangers

Tube and shell heat exchanger (also known as shell and tube heat exchanger) is a widely used heat exchange equipment in industries such as chemical, petroleum, pharmaceutical, and energy, which exchanges heat through fluids in both the tube and shell sides. The following is a detailed introduction to tube heat exchangers:

1、 Structural composition

The tube heat exchanger is mainly composed of the following components:

1. housingExternal cylindrical body, accommodating tube bundles and shell side fluids.

2. restrainMultiple parallel arranged heat exchange tubes, made of materials such as stainless steel, copper, titanium, etc.

3. tube sheetFix the end plates of the tube bundle to ensure fluid isolation between the tube side and the shell side.

4. Head cover (end cap)Connect the fluid inlet and outlet of the pipeline, which is divided into fixed end and detachable end.

5. baffleGuide the flow of shell side fluid and enhance turbulence to improve heat transfer efficiency.

6. support plateFixed tube bundle to prevent vibration and deformation.

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2、 Working principle

• Pipeline fluidEnters the heat exchange tube from the head, exchanges heat with the shell side fluid through the tube wall, and flows out.

• Shell side fluidEnter through the inlet on the side of the shell, and under the guidance of the baffle, horizontally flush the tube bundle to complete heat exchange before exiting.

• Heat transfer methodsMainly through convection and heat conduction, heat is transferred through the metal tube wall.

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3、 Main types

1. Fixed tube plate：

• The tube bundle is fixed at both ends to the tube plate, with a simple structure and low cost.

• shortcomingWhen the temperature difference between the shell and the tube bundle is large, thermal stress is easily generated, and expansion joints need to be installed.

• Applicable scenariosWorking conditions with small temperature difference and low pressure.

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2. Floating head style：

• One end of the tube plate can float freely to compensate for thermal expansion.

• advantageSuitable for working conditions with high temperature, high pressure, and large temperature differences.

• shortcomingComplex structure and high cost.

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3. U-shaped tube type：

• The heat exchange tube is bent into a U-shape and fixed at both ends on the same tube plate.

• advantageFree expansion and resistance to temperature and pressure changes.

• shortcomingDifficult to clean inside the tube, suitable for cleaning fluids.

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4. Packing box type：

• Floating of the tube bundle is achieved through packing sealing, suitable for corrosive media.

• applicationHeat exchange in strong acid and alkali media in the chemical industry.

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