Explosion-proof Immersion Mineral Insulated Heating Rod for Oil Tank

Explosion-proof immersion electric heating rod for oil tank (hereinafter referred to as electric heating rod) is an electric heating device designed to raise the temperature of the medium in oil tank. The electric heating rod uses a mineral insulated (MI) heating cable as heating element. With a firm and durable structure, it possesses a reliable function with long service life and no coke generated in the heated medium. The electric heater is installed on the wall of the container by inserting into the medium to heat various liquid or gas medium. This product is widely used in petroleum, chemical, pharmaceutical, water treatment, food processing, commercial oil depot, power generation and other departments, especially suitable for heating heavy and high viscosity oil, or medium with high temperature or quality requirements (such as crude oil, asphalt, residual oil, heavy diesel oil, animal fat and vegetable oil, etc.). Typical applications include hot water tanks for offshore oil platforms and fuel oil tanks for commercial oil depots.

2. Model Meaning

3. Technical Properties

1. The heating element is a mineral insulated (MI) heating cable with properties of good thermal conductivity and small temperature difference between the heating core and the metal sheath. According to personized process requirements, the surface heat load density of the MI heating cable can be accurately designed. Under the premise of ensuring the total heat output, the heated medium is not coked or charred. It has solved the shortcomings of the conventional tubular electric heater which has long-term carbon deposition, blasting, core breaking and short life. The heating element can be with a copper sheath and a stainless steel sheath according to the user's place of use and medium.

2. The overall structure is small and solid, with high mechanical strength and installed as an inserted immersion type.

3. It heats evenly with a high heat exchange efficiency.

4. The electric heater is designed to meet the structural requirements of various types of storage containers for petroleum and chemical products. The device connection and electrical connection are in compliance with explosion-proof requirements with a rating of dIIB T1~T6.

5. It possesses reliable work, long service life, convenient operation and maintenance, and no daily maintenance required.

6. Electric heaters have good corrosion resistance to the medium of petroleum, chemicals and their finished products.

7. The heater body has good pressure sealing performance, safe to use with working pressure of 0.1MPa ~ 6.4MPa.

8. A temperature sensor is installed inside the heater body to detect the temperature of the oil, the overheating of the oil, and the surface temperature of the heating element.

9. The product has strong adaptability and practicability. Non-standard type electric heaters can be designed and fabricated according to different purposes and special requirements provided by users.

4. Structure, working principle and technical data

1.Structure

The electric heater is comprised of 6 parts (see draft 1)

⒈ Outer Casing ⒉ Mineral Insulated Heating Cable⒊ Over-temperature Protector⒋Temperature measuring electric resistor⒌Electrical junction box⒍Oil outlet pipe (If necessary)

Figure 1: Schematic diagram of the explosion-proof electric heater for tanks

2. working principle

When the electric heater is turned on, the temperature of the medium naturally rises along the heating element (heating cable), and the cold medium flows in around the heating element to replenish. Repeated thermal is convective flowed and circulated, so that the medium temperature gradually increases with the increased heating time. A temperature measuring sensor is installed on the wall of the container, the temperature signal is collected and transmitted to the electronic control system, and the temperature control instrument controls the primary circuit to realize automatic temperature control of the oil temperature. If the electric heater or the heating element is overheated, the protection device automatically cuts off the power supply, and the control cabinet emits an audible and visual alarm signal (for details, please refer to the instruction manual of the WK series electric heating control cabinet).

3. Technical data

Table 1 Technical data and dimensions of container explosion-proof electric heater

Pasia Industries is a scientific and technological enterprise specializing in researching, developing, producing, installing and providing technical consultation and service for mineral insulated heating cables, heating elements and finished heaters as well as welded honeycomb products for filtering, shielding, sealing and guiding. Located in Puyuan high-tech park, Zhejiang province, it covers an area of more than 10 hectares, with a construction area of more than 50,000 square meters. It possesses a convenient transportation, about 150 kilometers from Shanghai in the north and 40 minutes from Hangzhou Xiaoshan international airport in the south.

With the most professional production lines and the highest automation level in China, Pasia produces mineral insulated heating cables, heating elements and finished heaters, honeycomb cores of stainless steel, brass, nickel, aluminium and other metal or metal alloys according to international standards. Pasia is one of the top four professional manufacturers of industry in the world on capacity and sales. As leading technological products, they possesses advanced properties of good quality, many varieties, full specification range, wide application, long service life, good safety and easy maintenance etc., and have been successfully applied to oil and gas (extraction, transportation, storage, etc.), chemical industry （petrochemical industry, fine chemical, pharmaceutical, etc.), power (nuclear power, solar power, etc.), construction (melting ice and snow), railway, aviation, metallurgy, electronic and et al for the applications as heat tracing and heating, detecting, signaling, power transmission, as well filtering, shielding, guiding and sealing. The company has become one manufacturer of the few in the world of completely electric heating technology and products of four categories including constant wattage, temperature self-regulating, MI heating cable and skin effect resistance and one of the top three wire electric heating products suppliers. The honeycomb core has been widely used by many clients on filtering, water treatment, structure platform with high requirement on flatness, shielding, turbine sealing and straightening etc. It can not only provide complete categories of professional products, also provides customers with solutions, consulting, project reply, EPC project general contracting services which can even be extended to the services including safe operation for maintenance etc. So far, the company has possessed 25 related patented technologies, 13 national new products, and 12 national technological innovation projects.

Upholding a company spirit of leading innovation and win-win cooperation, Pasia has become one of the few in the industry who possesses complete capacity of research and development, design, production and installation of mineral insulated heating cable and its heating equipment, honeycomb core and its parts or modules both home and abroad, relying on professional team, advanced management means, close work with related universities, design institutes and scientific research units, industry leading R&D testing capacity, under the ISO9001 quality system. After several years’ hard and persistent efforts, Pasia have the ability to supply a complete set of products, excellent technical support and perfect follow-up service. A variety of products have not only been applied to meet the requirements from domestic market, but also exported to many countries and regions such as Europe, Asia, Africa and America to serve different categories of purposes. It receives a high visibility and reputation from the industry. Over the past years, the company has involved in thousands of projects from all walks of life, among which the most influential ones are:the explosion-proof natural gas electric heater at Datong natural gas gate station in Shanxi province; Electric heater for paint material for the production bases of Hempel (USA) paint company in Kunshan and Guangzhou; Electric heaters for Tongyi chemical system in Beijing, Lanzhou, Shanghai and Shandong; Complete heating and tracing equipment for large oil and gas fields in Jiangsu oilfield, Benin, Angola, Thailand, Myanmar, Kazakhstan, the UK, Canada; the wind or water tunnels of honeycomb core in Singapore, India, USA and UK, shielding honeycomb core applications from many foreign countries, honeycomb seals for the turbines from Russia etc.

Insists on serving market with sincerity, securing quality with technology, leading innovation with study and driving development with passion, Pasia has become a well-known provider of advanced heating technology solutions at home and abroad, and one of the fastest growing members in the industry.