Hot water plate heat exchanger

Hot water plate heat exchangers have been widely used in central heating, production, and domestic water use. The difference between hot water plate heat exchangers and steam water heat exchangers is that the heat source of hot water plate heat exchangers is hot water, while the heat source of steam water heat exchangers is mostly steam. There are many types of hot water plate heat exchangers, and plate heat exchangers are commonly used. Let's take a look at the structure and characteristics of hot water plate heat exchangers.

1、 Hot water plate heat exchanger structure
Plate heat exchanger is a type of heat exchanger composed of a series of corrugated metal sheets stacked together. Thin rectangular channels are formed between various plates for heat exchange. Plate heat exchangers are ideal equipment for water to water heat exchange. It has the characteristics of high heat transfer efficiency, low heat loss, compact and lightweight structure, small footprint, wide application, and long service life. Under the same pressure loss, its heat transfer coefficient is 3-5 times higher than that of a tube heat exchanger, occupying one-third of the area of a tube heat exchanger, and its heat recovery rate is much higher than that of a tube heat exchanger.

Hot water plate heat exchangers were initially used as hot water heat exchangers. Due to the limitation of gaskets, detachable plate heat exchangers cannot operate under conditions of high temperature and pressure. With the continuous development of the industry, the birth of fully welded plate heat exchangers not only retains the advantages of high heat exchange efficiency and small footprint of detachable plate heat exchangers, but also overcomes the working conditions of high temperature and high pressure resistance.

Hot water heat exchangers are not only used for heating, but also for heating industrial solvents and other liquids with hot water used in production. However, with the popularity of industrial furnaces, more and more industries are using steam for heating, preheating, and other purposes. The use of water as a heat medium for heating and preheating is becoming more common in the recovery and utilization of waste heat from wastewater.

2、 Application fields of hot water plate heat exchangers
Hot water plate heat exchangers have been widely used in metallurgy, mining, petroleum, chemical, power, medicine, food, chemical fiber, papermaking, textile, shipbuilding, heating and other sectors. They can be used for heating, cooling, evaporation, condensation, waste heat recovery and other situations.

1. Solar energy utilization: Participate in the heat exchange process of heat transfer media such as ethylene glycol and antifreeze in solar collectors to achieve the purpose of utilizing solar energy.
2. Chemical industry: manufacturing titanium oxide, alcohol fermentation, synthetic ammonia, resin synthesis, manufacturing rubber, cooling phosphoric acid, cooling formaldehyde water, alkali carbon industry, electrolytic alkali production.
3. Steel industry: cooling quenching oil, cooling electroplating fluid, cooling reducer lubricating oil, cooling rolling mill, drawing machine cooling fluid.
4. Metallurgical industry: Heating and cooling of aluminate mother liquor, cooling of sodium aluminate, and cooling of lubricating oil for aluminum refining and rolling mills.
5. Mechanical manufacturing industry: various quenching fluids for cooling, lubricating oil for cooling presses and industrial mother machines, and oil for heating engines.
6. Food industry: Hot water plate heat exchangers are used for cooling salt, dairy products, soy sauce, vinegar, heating and cooling animal and vegetable oils, heating and cooling beer and malt extract in beer production, sugar production, gelatin concentration, cooling, and manufacturing of monosodium glutamate.
7. Textile industry: various waste liquid heat recovery, cooling of boiling phosphating fibers, cooling of adhesive solution, cooling of acetic acid and acetic anhydride, cooling of alkaline aqueous solution, heating and cooling of adhesive fibers.
8. Paper industry: cooling black water, heating and cooling of bleaching salt and alkali solution, heat recovery of glass paper waste liquid, heating and cooking acid, cooling of sodium hydroxide aqueous solution, recovery of bleaching paper waste liquid, condensation of exhaust gas, preheating and concentration of pulp like waste liquid.
9. Central heating: Heating in the waste heat area of the thermal power plant, heating domestic water, and heating in the boiler area.
10. Oil industry: Heating and cooling synthetic detergents, heating whale oil, cooling vegetable oil, cooling sodium hydroxide, cooling glycerin and emulsified oil.
11. Power industry: generator shaft pump cooling, transformer oil cooling.
12. Ships: diesel engines, coolers, jacket water coolers, piston coolers, lubricating oil coolers, preheaters, seawater desalination systems (including multi-stage and single-stage).
13. Marine aquaculture seedling cultivation: Supporting boilers to heat up the seawater for seedling cultivation has saved the use of coal, thereby saving energy and environmental protection.
14. Others: pharmaceuticals, petroleum, ceramics, glass, cement, geothermal utilization, etc.