The cement industry is a high energy consuming industry, and cement kilns generate a large amount of waste heat during the production process. According to statistics, the waste heat from cement kilns accounts for 30% to 60% of the total energy consumption in cement production. Recycling and utilizing this waste heat can help save energy and reduce emissions, and promote the sustainable development of the cement industry. Among numerous waste heat recovery equipment, our plate heat exchanger has been widely used due to its efficient heat transfer performance.
Product Structure
A plate heat exchanger is composed of a series of metal plates with certain corrugated shapes stacked together, forming narrow and winding channels between the plates. The edges of adjacent plates are sealed with sealing gaskets to ensure that the medium does not leak. Suitable materials can be selected based on the characteristics of different media and working temperatures.
Technical principles
Plate heat exchangers are based on the principle of wall to wall heat transfer, where two fluids of different temperatures flow on both sides of the plate and transfer heat through the plate. Usually, the counterflow heat transfer method is used, where two fluids flow in opposite directions inside the heat exchanger. This heat exchange method maintains a large temperature difference between the hot and cold fluids throughout the entire heat exchange process, thereby improving heat exchange efficiency and maximizing the recovery of waste heat. Compared with traditional shell and tube heat exchangers, the heat transfer coefficient of plate heat exchangers can be increased by 3-5 times.
Waste heat recovery plan
The high-temperature exhaust gas discharged from the cement kiln first enters the waste heat collection device and is transported to the plate heat exchanger through pipelines. In order to prevent dust in the exhaust gas from causing wear and blockage of the heat exchanger, dust removal equipment is usually installed before entering the heat exchanger. In the plate heat exchanger, high-temperature exhaust gas exchanges heat with low-temperature water or other heat media. After absorbing heat from exhaust gas, the temperature of the heat medium increases, which can be used to produce hot water, steam, or provide thermal energy for other processes. After heat exchange, the temperature of the exhaust gas decreases and meets the emission standards before being discharged into the atmosphere.