Shandong Longxing Group (Tan Xuezhou     :  ) Thermal oil furnace series: Longxing  Heat transfer oil furnace, coal-fired heat transfer oil furnace, electric heating heat transfer oil furnace, fuel heat transfer oil furnace, gas heat transfer oil furnace, organic heat carrier heat transfer oil furnace, Longxing  Heat transfer oil boiler, coal-fired heat transfer oil boiler, electric heating heat transfer oil boiler, Longxing  Organic heat carrier furnace, Longxing  Organic heat carrier boiler, vertical heat transfer oil furnace, horizontal heat transfer oil furnace
Thermal oil furnace operating procedures : 
1. Inspection before starting 1. Whether the heating furnace and its surroundings are clean and free of debris, check whether the furnace body, burner, controller, fire hole, chimney, etc. are normal;
2. Reverse the process equipment and process, check whether the oil level of the expansion tank is above the 1 / 4 - 1 / 2 liquid level, and whether the thermometer, pressure gauge, etc. are normal;
3. Turn on the power of the heating furnace control cabinet, check whether the voltage is normal, check whether the indicator light and each display instrument are normal;
4. Adjust the gas main pressure reducing valve and the secondary pressure reducing valve so that the pressure is controlled to 0.005 MPa .
Second, start 1 , start the heat transfer oil circulation pump ( save one prepare one, refer to the pump operation rules), after the pump is started, the normal cycle is about 0.5 hours to make the pressure stable;
2. Press the burner start button to observe whether the furnace flame is burning normally. If it does not ignite, restart the burner after troubleshooting.
Third, stop operation  1. Normally shut down the furnace 1 gradually reduce the temperature, turn off the burner, stop the combustion; 2When the temperature of the hot oil drops below 70 °C, stop the operation of the hot oil circulation pump (refer to the pump operation procedure); 3 Turn off the main power supply, do a good job Handover record.
2. Emergency shutdown
If the furnace is emergency shut down due to an emergency, the burner should be quickly shut down, and the burner should be removed along the hinge of the burner to allow natural ventilation between the furnace and the chimney to dissipate the heat stored in the furnace so that the heat transfer oil naturally Cool to prevent overheating.
Fourth, matters needing attention
1. During the inspection, it is necessary to check whether there is leakage around the heat-conducting oil furnace. There should be sufficient fire-fighting equipment in the vicinity of the oil and electrical appliances. Water is not allowed as a fire extinguishing agent;
Thermal oil furnace principle: 
  For electric heating oil furnaces, heat is generated and transmitted by electric heating elements immersed in heat-conducting oil. Using heat-conducting oil as a medium, a circulating pump is used to force the heat-conducting oil to perform liquid phase circulation, and heat is transferred to one or more heats. After the equipment is unloaded by the heat equipment, it is re-circulated by the circulation pump, returned to the heater, and then absorbed heat, and transferred to the heat equipment, so that the heat is continuously transmitted to increase the temperature of the heated object to reach the heating process. Claim.
Electric heating furnace  Electric heating oil furnace  Performance characteristics and technical parameters of electric heating and heat transfer oil furnace products:
Operating temperature: 0 to 350 °C
Working medium: heat transfer oil
Working pressure: atmospheric pressure
Design pressure: 0.7MPa
Heating capacity: 25 ~ 360kW (2 ~ 300,000 kcal / hour)
Product specifications: single heating capacity is 2 , 3 , 4 , 6 , 10 , 15 , 20 , 300,000 kcal / hour
Combustion method: electric heating
Applicable fuel: electricity 380V/220V
Automatic control: mechanized, fully automatic control, proportional adjustment, PLC programmable and touch screen control technology
Although the electric heating furnace is environmentally friendly, Â However, it is not energy efficient. In contrast, fuel gas heat transfer oil furnaces are 80% more energy efficient than electric heating .
Thermal oil furnace cleaning: 
   Construction plan:
   Chemical cleaning adopts China's patented technology, combined with the particularity of the internal structure of the heat transfer oil heating system and the diversity of materials, the following cleaning schemes are determined:
   Heat transfer oil venting - steam rinsing - degreasing - descaling cleaning - rinsing - neutralization
   Passivation - steam flushing - inspection and acceptance - nitrogen purge - reset temperature
  (1) Steam flushing The heat transfer oil in the pipeline is emptied, and the inside of the pipeline is flushed with steam to remove surface impurities, rust and other dirt.
  (2) The purpose of degreasing and degreasing is to remove the oily substances in the system and infiltrate and transform the scales to create conditions for the descaling step. The oil stain originally existed on the surface with a spread oil film, and gradually curled into oil beads under the action of washing and preferential wetting, and was washed after leaving the surface.
  (3) Defocusing and descaling This procedure is a key step in chemical cleaning. The purpose is to chemically react with the scale by using a special decanting detergent to prepare a water-soluble substance to be taken out of the system by the cleaning liquid. To achieve the purpose of clearing the focus and descaling.
   The heat transfer oil is heated and coked on the wall tube, and the coke block is very hard. It has been concluded from the study of clearing practice for many years that the clear focus of the heat transfer oil should adopt the comprehensive effect of clearing focus: solubilization; adsorption ——The adsorption of the surfactant on the surface of the dirt and the object to be washed (the tube) changes the interface and various substances on the surface (such as mechanical, electrical and chemical properties); emulsification - forming a strong interface film, Conducive to the stability of the emulsion, the oil stains are not easy to precipitate on the surface of the solid (furnace tube), add detergent to improve the washing effect. It is beneficial to the suspension of fouling particles, preventing the deposition of fouling particles, plus the effects of temperature (thermal motion) and mechanical force to achieve the optimal washing effect of Zui.
  (4) Rinsing and rinsing is to combine the rinsing liquid prepared according to the regulations with the free ions remaining in the system to further improve the descaling rate and lay a good foundation for the neutralization passivation process.
  (5) The neutralization neutralizing solution reacts with the residual rinsing liquid in the system to make the pH value in the entire system meet the specified requirements.
  (6) The passivation solution for passivation forms a complete and dense passivation protective film on the cleaned metal surface.
  (7) Washing water after washing ensures that all cleaning agents are exhausted and the inside of the pipe wall is clean.
  (8) After inspection and acceptance, the contractor shall first self-check the cleaning quality. After the self-inspection quality is qualified, the contractor shall jointly organize inspection and acceptance. After passing the inspection, both parties shall sign the cleaning acceptance report.
  (9) Nitrogen purge is to discharge the residual moisture in the pipeline as much as possible, and it can be purged with nitrogen or compressed air.
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