Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Circulating freezing device fully utilizing liquid nitrogen cooling capacity and construction method
The invention discloses a circulating freezing device fully utilizing liquid nitrogen cooling capacity and a construction method, and belongs to the technical field of underground engineering. The circulating freezing device comprises a liquid nitrogen supply system, a freezing pipe circulating system and a nitrogen freezing system; the freezing pipe circulating system comprises a plurality of freezing pipes which are inserted into a soil layer and are communicated with one another; the liquid nitrogen supply system is connected with each freezing pipe and is used for inputting liquid nitrogen into the freezing pipes; the liquid nitrogen freezes the surrounding soil layer, the gasified nitrogen circulates among the freezing pipes, and the soil layer continues to be frozen; the nitrogen freezing system comprises a freezing tank, an auger rod and a Stirling cryocooler; the auger rod is fixed in the freezing tank, and the Stirling cryocooler is used for cooling and freezing the auger rod; the freezing pipes are communicated with the freezing tank; nitrogen in the freezing pipe is input into the freezing tank to be frozen by the auger rod and then is conveyed back to the freezing pipe. The cooling capacity of the low-temperature nitrogen after the liquid nitrogen is gasified is fully utilized, the temperature rise of the gasified low-temperature nitrogen is delayed, and the method has the advantages that the liquid nitrogen freezing cost is reduced, and the construction safety is improved.
本发明公开了一种充分利用液氮冷量的循环冻结装置及施工方法，属于地下工程技术领域，包括液氮补给系统、冻结管循环系统和氮气冷冻系统；冻结管循环系统包括若干插入在土层中且相互连通的冻结管；液氮补给系统与各冻结管连接，为其输入液氮；液氮对周围的土层进行冻结，气化后的氮气在若干冻结管之间循环，继续冻结土层；氮气冷冻系统包括冷冻罐、绞龙杆和斯特林制冷机；绞龙杆固定在冷冻罐内，斯特林制冷机对绞龙杆进行降温冷冻；若干冻结管与冷冻罐连通；冻结管内的氮气输入至冷冻罐内被绞龙杆冷冻，然后再输送回冻结管。本发明充分利用液氮气化后低温氮气的冷量，延缓气化后低温氮气的升温，具有降低液氮冻结成本、提高施工安全性等优点。
Circulating freezing device fully utilizing liquid nitrogen cooling capacity and construction method
The invention discloses a circulating freezing device fully utilizing liquid nitrogen cooling capacity and a construction method, and belongs to the technical field of underground engineering. The circulating freezing device comprises a liquid nitrogen supply system, a freezing pipe circulating system and a nitrogen freezing system; the freezing pipe circulating system comprises a plurality of freezing pipes which are inserted into a soil layer and are communicated with one another; the liquid nitrogen supply system is connected with each freezing pipe and is used for inputting liquid nitrogen into the freezing pipes; the liquid nitrogen freezes the surrounding soil layer, the gasified nitrogen circulates among the freezing pipes, and the soil layer continues to be frozen; the nitrogen freezing system comprises a freezing tank, an auger rod and a Stirling cryocooler; the auger rod is fixed in the freezing tank, and the Stirling cryocooler is used for cooling and freezing the auger rod; the freezing pipes are communicated with the freezing tank; nitrogen in the freezing pipe is input into the freezing tank to be frozen by the auger rod and then is conveyed back to the freezing pipe. The cooling capacity of the low-temperature nitrogen after the liquid nitrogen is gasified is fully utilized, the temperature rise of the gasified low-temperature nitrogen is delayed, and the method has the advantages that the liquid nitrogen freezing cost is reduced, and the construction safety is improved.
本发明公开了一种充分利用液氮冷量的循环冻结装置及施工方法，属于地下工程技术领域，包括液氮补给系统、冻结管循环系统和氮气冷冻系统；冻结管循环系统包括若干插入在土层中且相互连通的冻结管；液氮补给系统与各冻结管连接，为其输入液氮；液氮对周围的土层进行冻结，气化后的氮气在若干冻结管之间循环，继续冻结土层；氮气冷冻系统包括冷冻罐、绞龙杆和斯特林制冷机；绞龙杆固定在冷冻罐内，斯特林制冷机对绞龙杆进行降温冷冻；若干冻结管与冷冻罐连通；冻结管内的氮气输入至冷冻罐内被绞龙杆冷冻，然后再输送回冻结管。本发明充分利用液氮气化后低温氮气的冷量，延缓气化后低温氮气的升温，具有降低液氮冻结成本、提高施工安全性等优点。
Circulating freezing device fully utilizing liquid nitrogen cooling capacity and construction method
一种充分利用液氮冷量的循环冻结装置及施工方法
FAN WENHU (Autor:in) / WANG JIAQI (Autor:in) / ZHANG TAO (Autor:in) / LIU ZHIFENG (Autor:in) / XIAO ZHI (Autor:in) / ZUO XI (Autor:in) / LIU DAN (Autor:in) / KIM JIN-HWA (Autor:in) / XUE LEI (Autor:in) / SHI ZHIXIN (Autor:in)
10.09.2024
Patent
Elektronische Ressource
Chinesisch
Mass concrete circulating water cooling construction method
| Europäisches Patentamt | 2020
Ground Freezing with liquid Nitrogen
British Library Online Contents | 2000