Views: 0 Author: JUSH Marketing Department Publish Time: 2025-05-19 Origin: Shanghai JUSH Pump
The hot water circulation system solution for high-temperature sewage pumps (120 ℃) requires a combination of high-temperature heat pump technology, waste heat recovery, and system optimization design. The following are the key points of a comprehensive solution:
1、 Core technology and equipment selection
Ultra high temperature heat pump technology
Adopting a cascade heat pump system, such as Midea's ultra-high temperature single machine two-stage variable frequency centrifugal industrial heat pump (130 ℃) and two-stage magnetic levitation steam compressor (150-200 ℃), the output of high-temperature steam or hot water is achieved through multi-stage compression and efficient heat exchange. This type of equipment utilizes environmentally friendly refrigerants (such as R1233zd (E)), with a heating efficiency ratio (COP) of 4.2 or higher, suitable for high temperature requirements in industrial scenarios such as chemical and textile industries.
Coupling technology of vortex tube and steam compression
Separate hot and cold air flows through vortex tubes, and use a compressor to increase the temperature of the heat source. For example, in the patent scheme of Tianjin University of Commerce, a high-temperature heat exchanger is connected to the hot end outlet of a vortex tube to achieve a three-step heat exchange cycle and improve the efficiency of thermal energy utilization.
2、 System Design and Optimization
Dual tank preheating system
The main water tank (high-temperature heat storage) is combined with the auxiliary water tank (preheating cycle) to avoid mixing of cold and hot water. The auxiliary water tank is quickly heated to the set temperature by a heat pump, and then transported to the main water tank for storage, reducing the operating time of the heat pump in the high-temperature section and improving energy efficiency.
High temperature resistant materials and anti-corrosion design
The pipeline and heat exchanger are made of corrosion-resistant materials (such as titanium alloy, stainless steel) to ensure long-term resistance to high temperatures of 120 ℃ and sewage corrosion.
Sealed design: For example, the Wuhan sewage source heat pump system adopts a closed-loop pipeline to prevent sewage from coming into contact with the heating medium and avoid pollution.
Intelligent regulation and energy efficiency management
Integrating IoT technology for real-time monitoring of temperature, pressure, and flow, such as Taizhong Group's smart heating system adjusting heating parameters through big data to ensure stable high-temperature output.
Dynamically adjust the operation mode of the heat pump, switch between single machine or stacked operation according to load demand, and reduce energy consumption.
3、 Application scenarios and economic benefits
Industrial sector
The process flow of high-temperature hot water or steam required by industries such as textiles, chemicals, and food processing can replace traditional boilers, with an annual energy-saving cost of millions of yuan.
Case: A textile factory adopts Midea ultra-high temperature heat pump system, saving 2.77 million yuan in steam costs annually and reducing carbon emissions by 1568 tons.
Municipal and architectural fields
Universities and commercial bathing centers: Utilizing waste heat recovery technology, such as Weihai Shuangxin's bathing wastewater heat pump system, the heating cost is only 1/6 of electric heating.
Regional heating: For example, the Wuhan sewage source heat pump system provides heating for a 10000 square meter residential area, reducing operating costs by 40%.
4、 Challenges and coping strategies
Efficiency attenuation under low-temperature climate
By using auxiliary electric heating or solar energy coupling technology to supplement the heat source, stable supply is ensured during extreme weather conditions.
System maintenance and cleaning
Integrated automatic cleaning function to prevent scaling of heat exchangers, such as the timed automatic filtration design of Weihai Shuangxin system.
Cascade utilization of waste heat
Combining industrial waste heat or wastewater waste heat recovery, for example:
Bath wastewater waste heat recovery: Heat is extracted from the 30 ℃ wastewater through a multi-stage heat exchanger, and then heated to 45-55 ℃ using a heat pump for secondary heating.
Industrial circulating water waste heat: Shanxi Taizhong Group utilizes 33-48 ℃ cooling water from the smelting workshop and upgrades it into a heating source through a water source heat pump system.
The core of the high-temperature sewage pump circulation system lies in high-efficiency heat pump technology, waste heat cascade utilization, and intelligent regulation. It is necessary to choose a cascade heat pump and waste heat recovery scheme based on specific scenarios, and optimize energy efficiency by combining high-temperature resistant materials and dual water tank design. In practical applications, customized design can be based on industrial cases (such as textile factories, chemical enterprises) or municipal projects (such as sewage source heating).