兰州市中深层水热型地热供暖工艺研究

李皓东; 朱俊宇; 王　辉; 刘行祥; 刘文辉; 杨永辉; 孙　睿

李皓东,朱俊宇,王　辉,刘行祥,刘文辉,杨永辉,孙　睿.兰州市中深层水热型地热供暖工艺研究[J].甘肃地质,2024,(3):45-51

兰州市中深层水热型地热供暖工艺研究

Thermal Geothermal Heating Technology of Deep Water ｉn Lanzhou City

DOI：

中文关键词: 水热型地热供暖回灌工艺兰州市主城区

英文关键词:hydrothermal geothermal heating process Lanzhou City

基金项目:甘肃省科技计划项目（22YF11GA320）、甘肃省地矿局2021年度创新资金项目（2021CX06）资助

作者	单位
李皓东	1. 甘肃省地质矿产勘查开发局第二地质矿产勘查院，甘肃　兰州　730020；2. 甘肃水文地质工程地质勘察院有限责任公司，甘肃　兰州　730020；3. 甘肃省地热资源勘查开发技术创新中心，甘肃　兰州　730020
朱俊宇	1. 甘肃省地质矿产勘查开发局第二地质矿产勘查院，甘肃　兰州　730020；2. 甘肃水文地质工程地质勘察院有限责任公司，甘肃　兰州　730020；
王　辉	1. 甘肃省地质矿产勘查开发局第二地质矿产勘查院，甘肃　兰州　730020；2. 甘肃水文地质工程地质勘察院有限责任公司，甘肃　兰州　730020；
刘行祥	1. 甘肃省地质矿产勘查开发局第二地质矿产勘查院，甘肃　兰州　730020；2. 甘肃水文地质工程地质勘察院有限责任公司，甘肃　兰州　730020；3. 甘肃省地热资源勘查开发技术创新中心，甘肃　兰州　730020
刘文辉	1. 甘肃省地质矿产勘查开发局第二地质矿产勘查院，甘肃　兰州　730020；2. 甘肃水文地质工程地质勘察院有限责任公司，甘肃　兰州　730020；
杨永辉	1. 甘肃省地质矿产勘查开发局第二地质矿产勘查院，甘肃　兰州　730020；2. 甘肃水文地质工程地质勘察院有限责任公司，甘肃　兰州　730020；
孙　睿	1. 甘肃省地质矿产勘查开发局第二地质矿产勘查院，甘肃　兰州　730020；2. 甘肃水文地质工程地质勘察院有限责任公司，甘肃　兰州　730020；

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中文摘要:

地热供暖工艺是决定地热供暖系统稳定运行的关键技术，为探索一套适宜于兰州市主城区的中深层水热型地热水供暖工艺流程，本文依托于彭家坪华润未来城市小区，首次设计开展了兰州市主城区中深层水热型地热供暖工艺试验研究。通过对地热水化学特征分析，研究了地热水的结垢性与腐蚀性对供暖管道和换热器的影响，并依据系统实际运行情况对回灌工艺进行了优化。结果表明，兰州市主城区中深层地热水具有高矿化度、强腐蚀性和多结垢性的特征，采用PE-RT Ⅱ型保温管和钛合金板式换热器可有效解决该设备腐蚀结垢问题。同时，采用旋流除砂器 + 150目不锈钢自清洗过滤器 + 200目尼龙网袋式过滤器 + 30 μm PP粗滤过滤器 + 5 μm PP精滤过滤器的回灌过滤工艺组合可初步解决回灌过滤难题，并经过试验验证，总结出了一套适宜于中深层水热型地热水供暖工艺流程，为兰州市主城区地热供暖规模化开发利用提供技术支撑。

英文摘要:

Geothermal heating technology is a key technology that determines the stable operation of geothermal heating systems. In order to explore a set of suitable deep water thermal geothermal heating process for the main urban area of Lanzhou City, this article relies on the Pengjiaping CR Future Urban Community to design and carry out experimental research on the deep water thermal geothermal heating technology for the first time in the main urban area of Lanzhou City. By analyzing the chemical characteristics of geothermal water, the influence of the scaling and corrosiveness of geothermal water on heating pipelines and heat exchangers was studied, and the reinjection process was optimized based on the actual operation of the system. The results show that the deep geothermal water in Lanzhou has the characteristics of high mineralization, strong corrosiveness, and multiple scaling. The use of PE-RT II insulation pipes and titanium alloy plate heat exchangers can effectively solve the problem of corrosion and scaling of the equipment. At the same time, a cyclone sand remover and a 150 mesh stainless steel self-cleaning filter and a 200 mesh nylon mesh bag filter and 30 μm PP coarse filter with 5 μm PP fine filter, the combination of backflow filtration process can preliminarily solve the problem of backflow filtration, and after experimental verification, a set of suitable deep water thermal geothermal heating process flow for Lanzhou area has been summarized, aiming to provide technical support for the large-scale development and utilization of geothermal heating in the main urban area of Lanzhou City.

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