Mechanical seal sealing and cooling system
By designing a mechanical seal cooling system, the problems of scaling and damage caused by the instability of cooling water in mechanical seals have been solved, thereby improving sealing performance and equipment operation stability, and reducing maintenance and production costs.
Patent Information
- Application Number
- CN202423187862.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Mechanical seals in evaporation equipment may become scaled or damaged due to the instability of circulating cooling water, affecting their service life and the stability of equipment operation.
The mechanical seal cooling system is adopted, including cooling pipelines, mechanical seal water pump, mechanical seal water tank, circulating water pump and plate heat exchanger. The stability of mechanical seal water and cooling effect are ensured by online monitoring and control of water quality, temperature and pressure.
It extends the service life of mechanical seals by 1.5 times, improves sealing performance, reduces wear, enhances the operating efficiency and stability of evaporation equipment, and reduces maintenance costs.
Smart Images
Figure CN223662181U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to mechanical seals for pumps used in evaporation equipment, specifically to a mechanical seal cooling system. Background Technology
[0002] With increasingly stringent wastewater discharge requirements, all enterprises generating industrial wastewater now need to add evaporation equipment to meet final wastewater treatment standards. The wastewater treatment process primarily utilizes evaporation equipment such as MVR evaporators and triple-effect evaporators to achieve compliant discharge. The circulating water pumps and transfer pumps required for evaporation equipment need to be high-temperature and corrosion-resistant. These pumps require mechanical seal water for cooling and sealing. Typically, circulating cooling water is used for mechanical seals. However, during operation, fluctuations in water quality, unstable pressure, and seasonal temperature changes can easily lead to scaling inside the mechanical seal, or damage and unusability due to low water pressure and high temperature. Therefore, using circulating water for cooling mechanical seals has certain drawbacks.
[0003] Research has found that during the operation of mechanical seals, the water supply pipeline for cooling the mechanical seals must ensure stable water pressure, a water temperature below 50°C, and as few calcium ions as possible in the water to extend the service life of the mechanical seals. Utility Model Content
[0004] The purpose of this invention is to provide a mechanical seal cooling system that can prevent scale buildup in the cooling channels inside the mechanical seal and extend the service life of the mechanical seal.
[0005] The technical solution is as follows:
[0006] The mechanical seal cooling system includes: a cooling pipeline, a mechanical seal water pump, a mechanical seal water tank, a circulating water pump, and a heat exchanger. The mechanical seal water tank is equipped with a first outlet, a second outlet, a first inlet, and a second inlet. The inlet of the mechanical seal water pump is connected to the first outlet, and the outlet of the mechanical seal water pump is used to connect to the mechanical seal water pipeline. The inlet of the circulating water pump is connected to the second outlet through a cooling pipeline, and the outlet of the circulating water pump is connected to the inlet of the heat exchanger through a cooling pipeline. The outlet of the heat exchanger is connected to the second inlet through a cooling pipeline. The first inlet is used to connect to the mechanical seal water pipeline.
[0007] Furthermore, a plate heat exchanger is selected.
[0008] Furthermore, online conductivity meters and pressure transmitters are installed at the outlets of the mechanical seal water pump and the circulating water pump, respectively.
[0009] Furthermore, the inlet and outlet of the mechanical seal water pump and the circulating water pump are respectively equipped with water flow indicators.
[0010] This utility model has the following advantages compared with the prior art:
[0011] In pumps used in high-temperature and high-salt rare earth waste liquids, where mechanical seal water is required to cool and seal the mechanical seal, the use of this utility model can extend the service life of the mechanical seal by 1.5 times.
[0012] This utility model can improve the sealing performance of mechanical seals and reduce wear, which not only helps to improve the operating efficiency of evaporation equipment and maintain the stable operation of the system, but also reduces the economic burden of long-term maintenance, ensures stable and continuous production, effectively reduces production costs, and improves production efficiency. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the mechanical seal cooling system of the pump used in the evaporation equipment in this utility model. Detailed Implementation
[0014] The following description fully illustrates specific embodiments of the present invention to enable those skilled in the art to practice and reproduce it.
[0015] like Figure 1 The diagram shown is a schematic diagram of the mechanical seal cooling system of this utility model.
[0016] The mechanical seal cooling system includes: a cooling pipeline 1, a mechanical seal water pump 2, a mechanical seal water tank 3, a circulating water pump 4, and a heat exchanger 5. The mechanical seal water tank 3 is provided with a first outlet 31, a second outlet 32, a first inlet 33, and a second inlet 34. The inlet of the mechanical seal water pump 2 is connected to the first outlet 31, and the outlet of the mechanical seal water pump 2 is used to connect to the mechanical seal water pipeline 7. The inlet of the circulating water pump 4 is connected to the second outlet 32 through the cooling pipeline 1, and the outlet of the circulating water pump 4 is connected to the inlet of the heat exchanger 5 through the cooling pipeline 1. The outlet of the heat exchanger 5 is connected to the second inlet 34 through the cooling pipeline 1. The first inlet 33 is used to connect to the mechanical seal water pipeline 7.
[0017] Mechanical seal water pipeline 7 serves as the mechanical seal water passage for the mechanical seal, used to transport mechanical seal water and cool the mechanical seal. MVR evaporator 8 and triple-effect evaporator 9 are connected in parallel to mechanical seal water pipeline 7.
[0018] Mechanical seal water pump 2 is used to deliver mechanical seal water to mechanical seal water pipeline 7. Mechanical seal water tank 3 is used to store fresh water with good water quality. Fresh water is used as mechanical seal water. Circulating water pump 4 is used to deliver mechanical seal water to cooling pipeline 1. Heat exchanger 5 is used to cool mechanical seal water. Cooled mechanical seal water returns to mechanical seal water tank 3 through second inlet 34.
[0019] Heat exchanger 5 is a plate heat exchanger with a circulation pipeline. The circulating water in the circulation pipeline exchanges heat with the mechanical seal water, thereby cooling the mechanical seal water. By utilizing the working principle of the plate heat exchanger's alternating hot and cold operation, the mechanical seal water in the mechanical seal water tank 3 is cooled to ensure that the equilibrium temperature of the mechanical seal water is below the set value.
[0020] The outlets of mechanical seal water pump 2 and circulating water pump 4 are equipped with online conductivity meters and pressure transmitters. The signals are sent to the remote central control unit, and the central control display screen shows the data in real time, which can monitor the changes in mechanical seal water quality at any time.
[0021] The mechanical seal water pump 2 and the circulating water pump 4 are equipped with water flow indicators at their inlet and outlet to observe the water flow.
[0022] The mechanical seal water stored in the mechanical seal water tank 3 is recycled, which effectively reduces the temperature of the mechanical seal water, ensures the water quality, and ensures the stability of the water quality.
[0023] This invention, through process and equipment optimization, reduces equipment damage and the number of mechanical seal replacements, achieving stable operation of the evaporation crystallization system. Simultaneously, it increases the effective uptime of the equipment, improves wastewater treatment capacity, and reduces the treatment cost of the evaporation system.
[0024] Because the evaporation crystallization system involves material concentration and crystallization during operation, with the crystallized material temperature around 100℃, the high liquid temperature necessitates the use of pumps with organic seals. Most of these pumps are made of titanium, and the mechanical seals themselves must also be made of titanium, resulting in higher costs. Furthermore, high temperatures, high calcium levels, insufficient pressure, and insufficient flow in the mechanical seal water will affect its lifespan. To extend the mechanical seal's lifespan, the water quality is monitored to ensure that the temperature, pressure, and flow rate remain within acceptable limits, thus extending the seal's lifespan and providing a solid foundation for stable pump operation. Simultaneously, this improves the pump's continuous operation rate, avoiding frequent start-ups and shutdowns due to mechanical seal replacements, and reducing production costs.
[0025] The terminology used in this invention is descriptive and exemplary, and not restrictive. Since this invention can be embodied in various forms without departing from the spirit or essence of the technical solution, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.
Claims
1. A mechanical seal cooling system, characterized in that, include: The system includes a cooling pipeline, a mechanical seal water pump, a mechanical seal water tank, a circulating water pump, and a heat exchanger. The mechanical seal water tank has a first outlet, a second outlet, a first inlet, and a second inlet. The inlet of the mechanical seal water pump is connected to the first outlet, and the outlet of the mechanical seal water pump is used to connect to the mechanical seal water pipeline. The inlet of the circulating water pump is connected to the second outlet through a cooling pipeline, and the outlet of the circulating water pump is connected to the inlet of the heat exchanger through a cooling pipeline. The outlet of the heat exchanger is connected to the second inlet through a cooling pipeline. The first inlet is used to connect to the mechanical seal water pipeline.
2. The mechanical seal cooling system as described in claim 1, characterized in that, Plate heat exchangers are selected.
3. The mechanical seal cooling system as described in claim 1, characterized in that, Online conductivity meters and pressure transmitters are installed at the outlets of the mechanical seal water pump and the circulating water pump, respectively.
4. The mechanical seal cooling system as described in claim 1, characterized in that, The mechanical seal water pump and the circulating water pump are equipped with water flow indicators at their inlet and outlet.