The ENVADA Online monitoring and fault diagnosis system contains the products and services provided by ENVADA and her companion.  The aim of the system is to help the client create a safe and comfortable production and live space so as to make the client not worrying the safe problem of their device any longer. This solution is for petrochemical industry. How to solve the problems of safety of production and device protection is introduced hereafter.

This is one of complete sets of guides introducing ENVADA’s solutions for the good of clients and some successful examples through the cooperation between ENVADA and other companies.

1. Petrochemical industry present development trend

There are enterprises of petrochemical industry of more than 30,000 in China at present, they holds the sum of industrial enterprises of 73%. Among them there are large-scale petrochemical enterprise groups of more than 10, the capital of each is more than 1 billion RMB, and the medium-scale and small-scale enterprises hold the sum of petrochemical industrial enterprises of 99%. These enterprises have the same characteristics although the scales of them are different. The production mode of them is a typical continual large-scale mode. The raw material occupies a large part in the cost of product; the automatically level of their shops is high; the demands to the action devices, the meters and the conditions of devices are high. Therefore, it is difficult to save energy consumption in the process of production on the premise of no technique innovation. The production device in petrochemical industry is a fixed continual production line so the maintenance is very important. Once the device in the line has a fault may the line be stopped and the economical loss be great.

The continual safe operation of device is the first task of petrochemical industry. To complete this task, the device must always be in a good condition. The unexpected accident, tear and wear rate and life prediction of device should be understood in advance. Therefore, the petrochemical enterprises should be able to predict various conditions that the device may meet so as to take suitable measures in advance to ensure continual safe operation of device.

2.     Solving your problem is our aim

To complete continual safe production, the device must always be in a good condition. Therefore, the forward real-time online monitoring is required so as to understand possible condition and time of occurrence of fault through monitoring variety of operation parameters of device before the fault occurs. Because the random fault occurs abruptly, which will produce the largest damage and cause the hardest loss, how to avoid the occurrence of random fault of device should be firstly considered. The technique of automatic online monitoring mode is advanced in comparison with online measuring and offline analysis monitoring mode as well as periodic monitoring mode so it can prevent the occurrence of abrupt fault of device and no special operator is needed to operate in the site. To predict the fault of device, which has much to do with time, and to change the maintenance mode of device are mainly take into attention here. The technique develops on the basic of state monitoring and fault analysis and is a key to complete that advanced predict maintenance substitutes preventative maintenance based on time.

The vibration signal is most widely used among many signals reflecting the status of device. Because the vibration is often the main cause of fault of device, the signal of vibration commonly reflects variety of fault of device and contains variety of rich messages. Measuring vibration of device is convenient and generally without any effect on normal operation of device.

The vibration monitoring is an important component monitoring operation state of rotating machinery. The fault diagnosis and predictive technique based on state maintenance is developed and applied along with the development of production technique. The technique development will make device maintenance mode transiting from traditional accident maintenance and periodic maintenance to advanced predictive maintenance so the utilization ratio is greatly improved, the shutdown maintenance time, the maintenance cost, the production cost and the inventory of backup are decreased. Otherwise, the vibration monitoring technique of rotating machinery is an essential tool for dynamic balance of rotator in the site and studying power characteristics of rotator. The important meaning of vibration protection of rotating machinery is that when there is an abnormal state in the device, the protection system would automatically make the device shutdown so as to avoid destructive or disastrous loss. This technique is developed on the base of state monitoring and fault analysis and is a key technique to complete that advanced predictive maintenance mode substitutes for preventative maintenance mode based on the time.

The vibration monitoring of rotating machinery has three characteristics：

 Convenience

      Making use of variety of advanced vibration sensor and secondary meter to monitor the signal of vibration of device conveniently.

 Online

The task of monitoring may be executed in the condition of normal operation of device and in the working place.

 Non-destructiveness

The monitoring procedure would not make any damage to the device monitored generally.

The online vibration monitoring technique is able to monitor and analyze the operating state of device. Not only may the fault and the seriousness of fault be understood at any time but also may that in what time the fault of device becomes unacceptable be predicted so the device should be shut down for maintenance through monitoring and analyzing the fault state and the development of fault of device in real time. That substitutes the traditional preventative maintenance mode based on the time with advanced predictive maintenance mode so as to provide scientific safeguard for safety of production.

3. EN3800 feature and advantage---Our product ensures safety of your device

The EN3800 online vibration monitoring and protection system made in ENVADA is designed and produced to meet above demands. The system is suited for online monitoring and protection of all large-scale and medium-scale rotating machinery including the steam turbine, water turbine, compressor, gas turbine, blower, motor, pump and so on. It can be used to monitor variety of parameters relevant to safety of device continually, e.g. rotating speed, shaft vibration, bush vibration, different expansion, eccentricity, swing, shaft displacement, case expansion etc and can be compatible with variety of sensors which are meet an international standard (including vibration displacement sensor and vibration speed sensor). This system would provide safeguard for continual safe production of your device.

EN3800 system overall construction

The EN3800B system is generally composed of the sensor system (electric eddy sensor and speed sensor), the EN3800 system and the computer (making use of the software of upper computer to analyze, diagnose and count the history data).

 Actual Case：Organic Chemical Plant Jilin Chemical Industry Company

1. Introduction

The Jilin Chemical Industry Ltd was established in Dec 13 1994. The largest shareholder was Jilin Chemical Group at that time. Since the Jilin Chemical Industry Ltd fell under China Petroleum Gas Group in 1999 and reorganization of assets of China Petroleum Gas Group, China Petroleum Gas Ltd has become the largest shareholder of Jilin Chemical Industry Ltd.

The Jilin Chemical Industry Ltd has 11 subsidiary units under it. There are 6 main production plants among it and others are auxiliary units. The capital of it is about 17.7 billions RMB. It is one of the largest manufacturer producing basic chemical industry product and chemical material. It mainly produces and markets the petroleum product, the petrochemical product, the organic chemical industry product, the inorganic chemical industry product, the chemical fertilizer, synthetic rubber and so on.

The EN3800 vibration monitoring system in Jilin Chemical Industry Ltd is composed of the eddy current sensor and monitoring system. The monitoring system adopts EN3800 intelligent online vibration monitoring and protection system made in ENVADA Beijing. There are three types: 8 channels, 12 channels and 16 channels. To meet the demands of monitoring in a long period and easy of maintenance for individual device, the monitoring systems for three units are individually distributed：A 8 channels EN3800 monitoring system for the steam turbine, a 8 channels EN3800 monitoring system for the compressor and a 8 channels EN3800 monitoring system for the tail gas turbine.