Styrene storage tank anti-static grounding device design specification

In the chemical industry, styrene is an important basic chemical raw material, widely used in plastics, rubber, fiber and other production fields. Styrene has the characteristics of flammable, explosive and easy to generate static electricity, so the prevention and control of electrostatic hazards is particularly important in the design and use of storage tanks. Among them, the anti-static grounding device is one of the core measures to ensure the safe operation of the storage tank. This paper will discuss the design points of anti-static grounding device of styrene storage tank in detail from the aspects of design specification, selection principle and installation requirements.

1. Styrene Storage Tank Electrostatic Hazard Overview

Styrene is an organic compound with good insulation properties and is easy to generate static electricity inside the storage tank or during transportation. The accumulation of static electricity may lead to the following hazards:

1. Electrostatic discharge (ESD): Electrostatic discharge may cause combustion or explosion accidents, especially when styrene and air are mixed to the explosive limit.
2. Adsorption of impurities: static electricity will attract air dust or other impurities, affecting the storage tank in the product quality.
3. Equipment damage: electrostatic accumulation may tank, piping or other equipment caused by electrochemical corrosion, shorten the equipment life.

Therefore, in the design of styrene storage tanks, effective anti-static grounding measures must be taken to ensure that static electricity can be exported in time to avoid the occurrence of static electricity hazards.

2. styrene storage tank anti-static grounding device design specification

1. Grounding resistance requirements The core of the anti-static grounding device is to safely introduce the electrostatic charge into the ground, so the control of the grounding resistance is very important. According to relevant industry standards, the grounding resistance of styrene storage tanks should not be greater than 100 ohms. Excessive grounding resistance may result in ineffective discharge of static electricity, increasing safety hazards, while too small may result in waste or additional engineering costs. Therefore, in the design need to consider the soil resistivity, grounding body shape and other factors, reasonable selection of grounding materials and structure.

2. Structural Design of Grounding Device The anti-static grounding device is usually composed of grounding electrode, connecting cable and grounding plate. In the design of styrene storage tanks, the grounding electrode should be embedded in the soil near the tank to ensure a good conductive circuit with the earth. The connecting cable shall be a special cable with anti-static performance, and one end of the cable shall be connected to the ground electrode, and the other end shall be fixed on the surface of the tank. The grounding plate shall be installed at the bottom of the tank to ensure a reliable electrical connection to the tank body.

3. Material selection Because styrene has a certain degree of corrosion, the selection of grounding device needs to consider corrosion resistance. The grounding electrode can be galvanized steel pipe or copper rod, and the connecting cable should be anti-static and anti-aging shielded cable. The grounding plate shall be made of corrosion-resistant stainless steel or aluminum alloy to prolong its service life.

3. Styrene Storage Tank Anti-static Grounding Device Selection Principle

When choosing an anti-static grounding device, the following factors should be considered:

1. Anti-static performance Choose a grounding device with high conductivity and low resistivity to ensure that static electricity can be quickly discharged.

2. Corrosion resistance Considering that styrene storage tanks are usually stored in the open air, the grounding device should have strong corrosion resistance to adapt to complex environments such as humidity and salt spray.

3. Installation convenience The installation of the grounding device should be simplified as much as possible to reduce the difficulty and cost of construction without affecting the normal use of the storage tank.

4. Economy On the premise of meeting the performance requirements, choose a cost-effective grounding device to avoid unnecessary waste.

4. Styrene Storage Tank Anti-static Grounding Device Installation Precautions

1. Installation position The grounding device should be installed at the bottom of the tank to ensure a good conductive path with the tank body. The grounding electrode shall be buried in the soil near the tank and shall not be more than 1 m from the bottom of the tank.

2. Connection mode Grounding cables shall be electrically connected by reliable means, such as welding or bolting, and shall be free from looseness or oxidation. The connection status of the grounding device should be checked regularly to ensure that it is always in good working condition.

3. Anti-corrosion treatment Due to the long-term contact with the soil, the grounding device may be corroded, so the grounding electrode and the ground plate need to be protected against rust, such as galvanized or coated with anti-rust paint. The anti-corrosion coating of the grounding device shall be checked regularly and the damaged part shall be repaired in time.

5. Styrene Storage Tank Anti-static Grounding Device Maintenance and Management

1. Periodic inspection The anti-static grounding device shall be inspected regularly, including grounding resistance test, connection status inspection and anti-corrosion coating inspection. It is recommended that a full inspection be carried out at least once a year to ensure that the device is always in a safe condition.

2. Record and Evaluation Establish inspection records and maintenance files of grounding devices, and analyze and evaluate the results of each inspection. Found that the problem should be dealt with in a timely manner, to avoid the occurrence of electrostatic hazards caused by negligence.

3. update and improvement With the advancement of technology and the update of industry standards, the grounding device should be upgraded in time, and more advanced materials and technologies should be used to improve the anti-static performance.

6. summary

The anti-static grounding device of styrene storage tank is an important facility to ensure the safe operation of the storage tank. Through reasonable design specifications, scientific selection principles and standardized installation and maintenance, the occurrence of electrostatic hazards can be effectively prevented to ensure the safety of the storage tank and the surrounding environment. For chemical companies, we should attach great importance to the design and management of anti-static grounding devices, and operate in strict accordance with relevant standards and specifications to provide a strong guarantee for production safety.