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What is the purpose and specific operation of debugging the thermal oil furnace?

What is the purpose and specific operation of debugging the thermal oil furnace?

The debugging of thermal oil furnace is divided into two parts: cold debugging and hot debugging. Now we will introduce the contents of these two parts in detail, so that the user knows how to debug the thermal oil furnace and make it better

The debugging of thermal oil furnace is divided into two parts, namely cold debugging and hot debugging. Now we will introduce the contents of these two parts in detail, so that the user knows how to debug the thermal oil furnace and make it work better.

One, cold debugging

Purpose 1.

(1) check whether the operation of each unit is normal or not.

(2) check whether the system operates normally under cold conditions.

(3) make the operation familiar with and master the operation essentials.

2. Request

(1) all the motors are turned correctly, the equipment is under normal load, and the operation is correct and continuous for more than 2 hours.

(2) the circulating oil pump should be cold adjusted before hydrostatic test.

(3) make debugging and running records, timely eliminate possible faults, and make all preparations before debugging.

Step 4.

(1) check whether all equipment and pipeline installation meet the requirements of the drawing.

(2) check whether the pressure test sweep of the system meets the requirements.

(3) check whether the electrical system and control instruments are properly installed.

(4) hot oil pump bearing box and other transmission mechanism according to the requirements of the injection of lubricating oil or grease.

(5) test each motion mechanism on a single machine to check whether the running direction is correct and whether the sound is normal.

(6) adjust each valve of the system to prepare for oil injection and test run.

(7) the injection pump is injected into the high expansion tank.

(8) start the hot oil circulating pump.

(9) observe whether the working display of instruments such as inlet and outlet pressure of hot oil circulating pump, pressure drop of furnace body, inlet and outlet oil temperature and smoke exhaust temperature is normal.

(10) run in cold state for more than four hours continuously. If there is no abnormal phenomenon, hot debugging can be conducted.

 

2. Thermal debugging

1. Initial heating stage

Start the hot oil circulating pump and start the cold furnace.After the ignition of the cold furnace, the temperature is increased at the rate of 10℃/ hour until 90 -- 95℃.Due to the high viscosity of oil in cold furnace, the flow rate inside the heating surface is low, the oil film on the tube wall is thick, and the heat transfer condition is poor, which makes the local oil film temperature too high.

2. Dehydration stage

In the range of 90-110 ℃, the residual water and the trace water contained in the organic heat carrier in the expulsion system are the stages.The heating rate is controlled within the range of 0-5 ℃, and the time is short depending on the dehydration.When the high expansion groove at the air pipe discharge volume is large, the bottom of the sound of water hammer, pipe vibration is intensified, the pressure gauge pointer swing range is large.Must stop heating, maintain constant temperature, if necessary, you can open the furnace door to reduce combustion.

In this stage, depending on the amount of residual water and the quality of the heat carrier, we must not blindly accelerate the rate of heating up the dehydration, because once the system water evaporation and vaporization, the volume will expand more than 1000 times, not only cause "boiling", so that the oil level rapid expansion of a large number of jet, and may make the compression component rupture accident.

3. Re-heating stage

When the sound of the thermal oil furnace and pipeline becomes less and less, and the hot oil circulating pump is no longer evacuated, the speed of 5℃/ h can be heated up again, but not more than 120℃, until the air discharge pipe is no longer steam excluded.

4. Degassing phase

After the dehydration process is completed, reheat at the rate of 30℃/ h, but it should still be noted that there may be residual water evaporation, and stop heating at any time.When the temperature reached 210-230 ℃ to stop, then the main thermal oil furnace to remove the light components.The light component in the heat carrier of liquid phase heating exists in the gas phase, which will cause "gas resistance" and make the pressure of the hot oil circulating pump unstable, the flow rate drop or interrupt.

The length of the deweighting process depends on the mass of residual heat carrier.When the air discharge pipe is no longer discharged, the pressure of the hot oil circulating pump is stable, that is, the speed of 0-10 ℃/ can be heated again.

5. Re-heating stage

From 210 ℃ to the working temperature of the heat-conducting oil furnace is heated up again at the speed of 40℃/ hour after the end of degasification. At this time, the indication of each measuring instrument and whether the operation is sensitive and accurate should be comprehensively investigated.Check whether the auxiliary machines and auxiliary equipment are working normally, and comprehensively check whether the heat carrier furnace and the whole heating system are working normally.