Reconditioning of EH Oil at IL&FS Tamil Nadu Power Company Limited

 Customer: IL&FS Tamil Nadu Power Company Limited, is a 1200 MW (2 x 600 MW) Thermal Power Project at Cuddalore district in Tamil Nadu. This case shot is about the awareness of their team towards Lubrication Reliability and robust reconditioning procedures to maintain the parameter of EH Oil within the limit to avoid breakdown of the plant and generation loss.

Concern Analysed: Rapid increase in the Total Acid Number (TAN) which could degrade the EH oil and led to possibilities of failure of Servo valve, hunting, power generation loss, unplanned shutdown, etc.

Proactive Measures Taken:

• Oil Analysis was done to check the properties of EH oil like Moisture, NAS value, Total Acid Number.

• External reconditioning System “MLC LVDH TRIX-20” was installed at the site along with the deployment of Service Engineers till the desired target was achieved.

Below graph shows the trend analysis of tracked values during the recondition of EH Oil at Unit #2:


Solutions Implemented: The EH oil reconditioning units of Minimac system i.e. TAN Reduction by Ion Exchange method (TRIX) MLC LVDH TRIX 20 played a major role in achieving the properties range within the recommended limits and simultaneous reduction of TAN, Moisture, and NAS value of the EHC fluid. Onsite training on the function of EH oil Re-Conditioner, FRF maintenance and contamination control, Importance of Oil Analysis Program was provided to their team by Minimac’s Service Engineer.

Consumable details are:

Filter consumption: 01 qty of 10-micron filter element and 01 qty of 3 microns consumed to achieve NAS 5 cleanliness

Total consumption of Resin: 60 Ltr


Benefits:

• Extending oil life

• Reduced TAN value

• Increased turbine availability & reliability

• Eliminate oil change


Way Forwards:

• It is advised to use FRF Re-conditioning system on regular basis 24x7 to keep oil properties within acceptable limits

• FRF maintenance program should be scheduled and to be followed dedicatedly

• Standard procedures of Refilling & changeover of control fluid should be followed

• Oil Analysis Program (OAP) should be implemented

Comments

Post a Comment

Popular posts from this blog

Control System Of Turbine - Failure & Maintenance

Image
Control System The turbine control system describes the control over the opening of control valves corresponding to demand signals, and steam flows into the turbine with the help of a governing system that facilitates the operation of the turbo set in an interconnected grid system. Governing system is responsible for various function such as speed & load control functions, the start-up/shut-down controls, the over-speed control, turbine stress calculation, to control the initial run-up and synchronization of the Unit, to assists in matching the power generated to that demanded by responding to system frequency changes, to regulate the steam control valves position (and hence the load generated)in response to signal from the operator or from the load dispatch Centre, to restrict the speed rise within acceptable limits should the unit get disconnected (islanding) from the lgridoad and some protective trip functions. With continuous research and developments in modern turbine technolo
Read more

Reconditioning of EH Oil

Image
A 1200 MW coal-fired thermal power plant using Into-Chinese Turbine EHC System in Southern India. The Plant was struggling with the rapid increase in TAN values in the EH oil of the governing system of the turbine. Also, the moisture content was more than permissible limits. Degradation of the oil was due to contamination ingression into the system resulting in by-product formation. Minimac’s EH oil reconditioning system “ MLC LVDH TRIX 20 ” proved to be the savior and an unexpected shutdown of the turbine worth ₹1.05 Cr per day was saved . PROBLEMS A rapid increase in the Total Acid Number (TAN) could degrade the EH oil and lead to the possibilities of failure of servo valve, hunting, power generation loss, unplanned shutdown, etc. Oil Analysis was done to check the properties of EH oil like Moisture, NAS value, Total Acid Number. SOLUTIONS Installation of Minimac’s EH Oil Reconditioning System “ MLC LVDH TRIX 20 ” is comprehensively designed with 4 major technologies to: Remove solid
Read more

Minimac Technology

Image
 The secret recipe of the growth story at Minimac Syste ms has been its capability to drive technological advancement in the field of contamination control for lubrication reliability. Research and development on technology and products have always been the key reason to keep the Minimac products a step ahead of its competitors in the market. Technological development has been one of the core competencies which Minimac possesses, thereby ensuring a definite competitive advantage. Contaminations in lubricants are of various types and characteristics depending on the lubricant, equipment application, ambient conditions, age of equipment, etc. In order to control, separate or eliminate the contamination, there are multiple techniques. Each technique has pros and cons and hence there is no single technology that can be considered universally better than others. ​ Minimac Systems over the years has become equipped with almost all the technologies which are required for contaminat
Read more