胶合板生产消耗大量能源，为提高经济效益，助力“碳达峰”“碳中和”目标，须提高能源效率，降低能耗。以胶合板生产过程中5股换热物流为研究对象，采用夹点技术对现有生产工况下的换热网络进行分析并提出优化改进方案。应用化工流程系统模拟软件Aspen plus建立胶合板生产流程中的换热网络，计算各侧线流股流量和物性数据，划分温度区间，确定最小传热温差并计算出夹点温度。传统夹点法确定最小传热温差 ( ∆ T_{\mathrm{m}\mathrm{i}\mathrm{n}}）为9 ℃，引入碳排放考虑因素后最小传热温差 ( ∆ T_{\mathrm{m}\mathrm{i}\mathrm{n}}）调整为7 ℃，平均夹点温度为116.5 ℃，利用夹点温度作为分析诊断换热网络中的跨越夹点物流现象，从而精确定位换热网络的瓶颈位置，调整不合理配置的冷热流股换热器，达到优化整个换热网络的目的。优化后系统冷、热公用工程用量各减少862 465.0 kW和202 642.0 kW，显著降低了装置能耗。

The production of plywood consumes a large amount of energy. In order to improve economic efficiency， support carbon peak and carbon neutrality goals， it is necessary to improve energy efficiency and reduce energy consumption. This article took 5 heat exchange logistics in the production process of plywood as the research object， used pinch point technology to analyze the heat exchange network under existing production conditions， and proposed optimization and improvement plans. Aspen Plus was applied to establish a heat exchange network in the plywood production process， calculate the stream flow rate and physical property data of each side line， divide the temperature range， determine the minimum heat transfer temperature difference， and calculate the pinch point temperature. The traditional pinch point method determined the minimum heat transfer temperature difference ∆ T_{\mathrm{m}\mathrm{i}\mathrm{n}} to be 9 ℃. After considering carbon emissions， the minimum heat transfer temperature difference ∆ T_{\mathrm{m}\mathrm{i}\mathrm{n}} was adjusted to 7 ℃， and the average pinch point temperature was 116.5 ℃. The pinch point temperature was used to analyze and diagnose the phenomenon of crossing pinch points in the heat exchange network， accurately located the bottleneck position of the heat exchange network， adjusted the improperly configured cold and hot stream heat exchangers， and achieved the goal of optimizing the entire heat exchange network. After optimization， the usage of cold and hot utilities in the system decreased by 862 465.0 kW and 202 642.0 kW respectively， significantly reducing the energy consumption of the equipment.