Low-speed pump sealing method for replacing water sealing with lubricating oil sealing

Abstract

The invention relates to the technical field of mechanical sealing, and discloses a low-speed pump sealing method for replacing water sealing with lubricating oil sealing, which comprises the following steps: step 1, determining applicable scene and equipment conditions; step 2, selecting adaptive medium and low temperature lubricating oil; 3, a lubricating oil sealing device is installed; 4, debugging and parameter confirmation before operation; 5, operating and maintaining the system; and 6, environmental benefit and leakage prevention and control. According to the low-speed pump sealing method with lubricating oil sealing replacing water sealing, the lubricity and the abrasion resistance of lubricating oil are remarkably superior to those of traditional water sealing, the friction loss of mechanical sealing faces (such as a sealing ring and a shaft sleeve) can be reduced, the service life of a sealing element is prolonged, equipment failures caused by sealing abrasion are reduced, the shutdown maintenance time is shortened, and the production continuity is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical seals, in particular to a low-speed pump sealing method in which lubricating oil seals replace water seals. Background Art

[0002] In traditional pumping systems, mechanical seals are usually cooled and sealed with water. However, this method results in large water losses, and long-term operation may lead to problems such as water leakage, equipment corrosion, and environmental pollution. To improve this situation, some application areas have begun to try to use lubricating oil instead of water seals. Lubricating oil can not only effectively avoid water leakage problems, but also provide better lubrication effects and extend the service life of mechanical seals.

[0003] At present, the application of lubricating oil seals is still subject to restrictions, such as applicable pump speed, conveying medium temperature, cooling requirements, etc. Therefore, studying how to optimize the performance of lubricating oil seals while meeting these conditions has become an important direction for improving the reliability of industrial pump systems. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the present invention provides a low-speed pump sealing method in which lubricating oil seals replace water seals, thereby solving the problems raised in the above-mentioned background technology.

[0006] (2) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solution: a low-speed pump sealing method using lubricating oil seal instead of water seal, comprising the following steps:

[0008] Step 1: Determine applicable scenarios and equipment conditions;

[0009] Step 2: Select suitable medium and low temperature lubricating oil;

[0010] Step 3: Install the lubricating oil sealing device;

[0011] Step 4: Debug and confirm parameters before operation;

[0012] Step 5: System operation and maintenance;

[0013] Step 6: Environmental benefits and leakage prevention and control.

[0014] Preferably, the lubricating oil seal is used for the mechanical seal of a low-speed pump, wherein the pump speed does not exceed 1450 rpm, the temperature of the conveying medium does not exceed 80°C, and the sealing system is suitable for a conveying system that does not require additional cooling.

[0015] Preferably, the lubricating oil is a medium to low temperature lubricating oil, which can provide lubrication without affecting the sealing effect.

[0016] Preferably, the low-speed pump is a slurry circulation pump for wet desulfurization, the conveying medium is a slurry with a temperature of about 55°C, and the conveying volume is large, which can be cooled by self-circulation.

[0017] Preferably, the lubricating oil system can maintain the sealing effect and reduce the frequency of mechanical seal replacement by regularly checking the quality and amount of the lubricating oil.

[0018] Preferably, the sealing system can effectively prevent slurry leakage, reduce environmental pollution and workplace hygiene issues.

[0019] Preferably, the device comprises a mechanical seal portion suitable for a low-speed pump, wherein lubricating oil is supplied to the seal through a pipeline to form a lubricating oil seal, replacing a traditional water sealing system.

[0020] (3) Beneficial effects

[0021] Compared with the prior art, the present invention provides a low-speed pump sealing method in which lubricating oil seals replace water seals, which has the following beneficial effects:

[0022] 1. This low-speed pump sealing method uses lubricating oil seals instead of water seals. The lubricity and wear resistance of lubricating oil are significantly better than traditional water seals, which can reduce the friction loss of mechanical sealing surfaces (such as sealing rings and sleeves), extend the life of sealing elements, reduce equipment failures caused by seal wear, shorten downtime for maintenance, and improve production continuity.

[0023] 2. This lubricating oil seal replaces the water seal sealing method for low-speed pumps. The lubricating oil seal layer can effectively prevent the leakage of slurry or media, avoid the cross-leakage problem that is prone to occur in traditional water seals, reduce work site pollution, reduce the cleaning costs and environmental management pressure caused by leakage, and comply with industrial hygiene standards and environmental protection requirements.

[0024] 3. This low-speed pump sealing method uses lubricating oil seals to replace water seals. Through the system used for self-circulation cooling (such as wet desulfurization slurry pumps), it saves the investment and energy consumption of equipment such as cooling water pumps and heat exchangers, simplifies the system structure; extends the life of the mechanical seal and directly reduces the number of replacements, reduces the cost of purchasing accessories and labor maintenance costs; completely replaces water seals, avoids the continuous water loss of traditional water seals, and is especially suitable for scenes with water scarcity or high water consumption restrictions.

[0025] 4. This low-speed pump sealing method uses lubricating oil seals instead of water seals. It is specially designed for low-speed pumps ≤1450 rpm to ensure that the lubricating oil is evenly distributed at low speeds, forming a stable lubrication layer and avoiding lubrication failure caused by high-speed centrifugal force. It is suitable for medium and low-temperature liquids ≤80°C (such as desulfurization slurry, food liquid, chemical solvents, etc.), broadening industrial application scenarios (such as wet desulfurization, food processing, petrochemicals, etc.); the lubricating oil type can be flexibly selected according to different equipment models and medium characteristics (such as corrosiveness and viscosity), and auxiliary functions such as oil level / oil temperature monitoring are added to improve system stability.

[0026] 5. This lubricating oil seal replaces the water seal sealing method for low-speed pumps. By regularly checking the lubricating oil quality and oil level, the problem of insufficient lubrication can be discovered and resolved in a timely manner. The maintenance process is simple and the operation threshold is lowered. The lubricating oil seal device accurately transports the lubricating medium through the pipeline. The structure is adapted to the mechanical seal of the low-speed pump. After installation, it can operate stably for a long time, reducing the risk of systemic failure. DETAILED DESCRIPTION

[0027] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0028] The present invention provides a technical solution: a low-speed pump sealing method using lubricating oil seal instead of water seal, comprising the following steps:

[0029] Step 1: Determine applicable scenarios and equipment conditions;

[0030] Step 2: Select suitable medium and low temperature lubricating oil;

[0031] Step 3: Install the lubricating oil sealing device;

[0032] Step 4: Debug and confirm parameters before operation;

[0033] Step 5: System operation and maintenance;

[0034] Step 6: Environmental benefits and leakage prevention and control.

[0035] In the present invention, in order to extend the sealing life, reduce leakage pollution, save maintenance costs, and do not require additional cooling equipment, a lubricating oil seal is provided for the mechanical seal of a low-speed pump, wherein the pump speed does not exceed 1450 rpm, and the temperature of the conveying medium does not exceed 80°C. The sealing system is suitable for conveying systems that do not require additional cooling. Lubricating oil is used instead of water seals, which is suitable for low-speed pumps ≤1450 rpm and medium and low temperature media ≤80°C, extending the sealing life, reducing leakage pollution, saving maintenance costs, and achieving the advantage of not requiring additional cooling equipment.

[0036] In the present invention, in order to improve the sealing effect, the lubricating oil is set to be a medium-low temperature lubricating oil, which can provide lubrication without affecting the sealing effect. The medium-low temperature lubricating oil is selected, which can stably lubricate at the applicable temperature and adapt to the working conditions.

[0037] In the present invention, in order to adapt to specific scenarios and have the advantage of energy saving, a low-speed pump is set as a slurry circulation pump for wet desulfurization. The conveying medium is a slurry with a temperature of about 55°C, and the conveying volume is large. It can be cooled by its own circulation. It is suitable for a wet desulfurization slurry circulation pump. The medium temperature is about 55°C. It uses its own circulation to cool down. No additional equipment is required. It can adapt to specific scenarios and has the advantage of energy saving.

[0038] In the present invention, in order to reduce maintenance costs, a lubricating oil system is set up to maintain the sealing effect by regularly checking the quality and quantity of the lubricating oil and reduce the frequency of replacing the mechanical seal. By regularly checking the quality and quantity of the lubricating oil, the stability of the sealing system can be maintained in time, the frequency of replacing the mechanical seal can be reduced, the equipment maintenance cost can be reduced, the equipment operation cycle can be extended, and the system reliability can be improved.

[0039] In the present invention, in order to reduce environmental pollution and improve the working environment, a sealing system is set up to effectively avoid slurry leakage, reduce environmental pollution and work site hygiene problems. The lubricating oil sealing system can significantly prevent slurry leakage, reduce pollution to the environment and health hazards in the workplace, improve the cleanliness and environmental friendliness of the production environment, and reduce cleaning and maintenance costs.

[0040] In the present invention, in order to improve the sealing effect and simplify system maintenance, a device is provided including a mechanical sealing part suitable for a low-speed pump, wherein lubricating oil is supplied to the sealing part through a pipeline to form a lubricating oil seal, replacing the traditional water sealing system. A special device is used to transport the lubricating oil to the sealing part through a pipeline to form a lubricating layer, replacing the traditional water seal. The structure is adapted to the low-speed pump and can provide stable lubrication after installation, thereby improving the sealing effect and simplifying system maintenance.

[0041] Example 1: Application in wet desulfurization system:

[0042] The lubricating oil sealing technology of the present invention is applicable to the slurry circulation pump in the wet flue gas desulfurization system. During the wet flue gas desulfurization process, the slurry temperature is usually between 50°C and 55°C. Due to the large volume of fluid being transported, the equipment itself will cool the slurry. Therefore, in this embodiment, the lubricating oil temperature range should be selected to meet the working environment of 50°C to 80°C to avoid the lubrication effect affected by overheating of the lubricating oil.

[0043] In this application, lubricating oil is delivered to the mechanical seal for lubrication, eliminating the need for conventional water seals. The lubricating oil offers enhanced lubricity and wear resistance, reducing seal ring wear and extending the life of the mechanical seal. Regularly checking the lubricating oil quality and level ensures an adequate supply of lubricating oil to the sealing system.

[0044] Implementation steps:

[0045] 1. Equipment selection: Choose a low-speed pump with a pump speed not exceeding 1450 rpm to ensure that the lubricating oil can be lubricated evenly in a low-speed environment;

[0046] 2. Lubricant selection: According to the characteristics of the conveying medium, select appropriate medium and low temperature lubricant to ensure that it can maintain good lubrication performance at an operating temperature of about 55°C;

[0047] 3. Install the lubricating oil sealing system: Install the lubricating oil sealing device at the mechanical seal of the pump to ensure that the lubricating oil can form an effective lubricating layer on the sealing surface;

[0048] 4. Operation monitoring: During the operation of the system, set up oil level and oil temperature monitoring devices to ensure that the state of the lubricating oil is normal and avoid affecting the sealing effect due to insufficient oil or excessive oil temperature.

[0049] Example 2: Other low-speed pump system applications:

[0050] In addition to wet flue gas desulfurization systems, the present invention is also applicable to other low-speed pump systems, such as those used to transport medium- and low-temperature liquids in industries such as food processing and petrochemicals. The pump speed in these systems also does not exceed 1450 rpm, and the temperature of the transported medium typically does not exceed 80°C, without the need for additional cooling equipment.

[0051] In such applications, the choice of lubricant needs to be further adjusted according to the specific working conditions, such as choosing a lubricant with strong antioxidant properties to cope with long-term high-temperature operation.

[0052] Implementation steps:

[0053] 1. Equipment selection: Equipment selection suitable for low-speed pumps to ensure that it meets the requirements of lubricating oil sealing technology;

[0054] 2. Lubricant selection: Select the appropriate lubricant based on the type and temperature range of the conveying liquid to ensure it has good lubricity and stability at the predetermined operating temperature;

[0055] 3. System installation: Install the lubricating oil sealing system to ensure that the system can adapt to the operating conditions of the pump and provide stable sealing and lubrication effects;

[0056] 4. Regular maintenance: Establish a regular inspection mechanism to ensure the stable operation of the lubricating oil system and avoid seal failure due to insufficient lubrication.

[0057] Summary: This invention systematically solves the pain points of traditional water seals such as high loss, easy leakage, and complex maintenance through three core paths: upgrading the lubricating medium, accurately adapting to the working conditions, and simplifying the system to save energy. It is technologically advanced, economically feasible, and environmentally friendly, and is suitable for industrial scenarios with low-speed, medium- and low-temperature medium transportation, and has significant promotion value.

[0058] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A low-speed pump sealing method using lubricating oil seal instead of water seal, characterized by: The steps include: Step 1: Determine applicable scenarios and equipment conditions; Step 2: Select suitable medium and low temperature lubricating oil; Step 3: Install the lubricating oil sealing device; Step 4: Debug and confirm parameters before operation; Step 5: System operation and maintenance; Step 6: Environmental benefits and leakage prevention and control.

2. The low-speed pump sealing method using lubricating oil seal instead of water seal according to claim 1 is characterized in that: The lubricating oil seal is used for the mechanical seal of a low-speed pump, wherein the pump speed does not exceed 1450 rpm, the temperature of the conveying medium does not exceed 80°C, and the sealing system is suitable for conveying systems that do not require additional cooling.

3. The low-speed pump sealing method using lubricating oil seal instead of water seal according to claim 1 is characterized in that: The lubricating oil is a medium to low temperature lubricating oil, which can provide lubrication without affecting the sealing effect.

4. The low-speed pump sealing method using lubricating oil seal instead of water seal according to claim 1 is characterized in that: The low-speed pump is a slurry circulation pump for wet desulfurization. The conveying medium is slurry with a temperature of about 55°C, and the conveying volume is large, which can be cooled by self-circulation.

5. The low-speed pump sealing method using lubricating oil seal instead of water seal according to claim 1 is characterized in that: The lubricating oil system can maintain the sealing effect by regularly checking the quality and amount of the lubricating oil, and reduce the frequency of replacing the mechanical seal.

6. The low-speed pump sealing method using lubricating oil seal instead of water seal according to claim 1 is characterized in that: The sealing system can effectively prevent slurry leakage, reduce environmental pollution and reduce work site hygiene problems.

7. The low-speed pump sealing method using lubricating oil seal instead of water seal according to claim 1 is characterized in that: The device comprises a mechanical sealing part suitable for a low-speed pump, wherein lubricating oil is supplied to the sealing part through a pipeline to form a lubricating oil seal, replacing a traditional water sealing system.