JPS5849778B2 - Temperature control device for thermal separation equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized by intermittently blowing pressurized gas into the heat generating tube from an inlet and applying work to the residual gas remaining in the heat generating tube with the sucked driving gas. The present invention relates to an improvement of a thermal separation device in which the drive gas is cooled to lower its temperature, while the residual gas in the tube that has been subjected to work is heated to increase its temperature.

Conventionally, there has been a temperature control device for a thermal separation device as shown in FIG.

That is, the thermal separation device 1 consists of a chamber 4 having a driving gas port 2 and a driving gas outlet 3, and a plurality of heat generating tubes 6 each having an opening 5 at one end in the chamber 4, and the other end of the heat generating tubes 6 opening 5. It is connected to the capacity tank 7.

Further, a temperature detection end 9 for detecting the temperature of the exhaust driving gas flowing through the piping system 8 is provided in the driving gas exhaust piping system 8 connected to the driving gas outlet 3, and a detection signal from the temperature sensing end 9 is provided. and the contact signal from the target temperature setting device 10 by the comparator 1.
1, and the output signal from the comparator 11 is sent to the regulator 1.
2 will be sent.

Furthermore, the driving gas exhaust piping system 8 and the capacity tank 7
are interconnected by a pipe 13, and a valve 14 whose opening degree is adjusted by a signal from the regulator 12 is interposed in the pipe 13.

Furthermore, the regulator 12 is connected to a defrosting command transmitter 15.

In the temperature control device of the conventional thermal separation device shown in FIG. The temperature of the residual gas increases, but the amount of residual gas whose temperature has increased to join the driving gas whose temperature has decreased can be changed depending on the degree of opening of the valve 14. Therefore, the degree of opening of the valve 14 can be controlled. Accordingly, the temperature of the exhaust gas 16 or the temperature of the heat generating tube 6 can be controlled.

However, in such a temperature control device, the high temperature gas in the exothermic tube 6 passes through the capacity tank 7 and flows to the valve 14, so the valve 14 must be made to withstand high temperatures.

Furthermore, if the supply gas 18 supplied to the chamber 4 from the inlet pipe 17 via the driving gas port 2 contains moisture, carbon dioxide, etc., the temperature near the inlet 5 of the heat generating tube 6 will be low, so that frozen matter etc. To remove a solidified buildup, valve 14 is opened and the thermal separator is operated at reduced efficiency;
The frozen matter was thawed in such a way that the temperature of the supply gas 18 did not drop.

Therefore, the supply gas temperature must be above the solidification temperature.
In addition, when the supply gas temperature is low, the time required for thawing becomes longer, which reduces the efficiency of the thermal separation device and increases the operating time.The present invention provides a thermal separation device that eliminates these drawbacks. Regarding the improvement of the temperature control device mentioned above, we installed piping from the supply gas piping to the thermal separation device to the container at the tip of the heating tube, and installed a valve with a variable opening degree in the middle of the piping. Its characteristics and purpose are:
Even if a supply gas that contains a large amount of solidified water or carbon dioxide gas or is below the solidification temperature is supplied, the solidified accumulation can be reliably removed within a short period of time, and the efficiency of the thermal separation device can be maintained at a high level. The object of the present invention is to provide a device that can easily control the temperature of exhaust gas or the temperature of a heat generating tube while maintaining the temperature of the exhaust gas or the temperature of the heat generating tube.

As described above, in the present invention, piping is provided from the supply gas piping to the thermal separation device to the container at the tip of the exothermic tube, and a valve whose opening degree is variable is installed in the middle of the piping. By appropriately adjusting the degree of opening of , the temperature of the exhaust gas or the temperature of the heating tube can be freely controlled. In the present invention, the supply gas contains a large amount of solidification components such as moisture and carbon dioxide, or the temperature of the supply gas is below the solidification temperature. Therefore, even if solidified accumulation is generated near the inlet of the exothermic tube, the high temperature gas generated in the exothermic tube can flow back to the inlet of the exothermic tube and heat the inlet, thereby eliminating the solidified accumulation. The material can be rapidly thawed and removed within a short period of time, and a decrease in efficiency of the thermal separation device for thawing and removing the solidified accumulated material can be prevented.

Furthermore, in the present invention, since the supply gas passes through the valve in the piping, there is no need to make the valve heat resistant.

The present invention will be described below with reference to the embodiment shown in FIG. 3. In the conventional thermal separation device 1 shown in FIG. Instead, the capacity tank 7 and the inlet pipe 17 are connected by a pipe a, and a valve b whose opening degree is adjusted by a signal from the regulator 12 is interposed in the pipe a.

Since the embodiment shown in FIG. 3 is constructed as described above, the supply gas 18 at a pressure higher than the critical pressure with respect to the residual gas pressure remaining in the heat generating tube 6 is used as the driving gas for the thermal separation device 1. When the gas is sucked into the exothermic tube 6 from the inlet 5 in an intermittent jet flow, a shock wave is generated in the residual gas inside the exothermic tube 6 toward the tip of the tube.

When the shock wave passes through the heating tube 6, the internal energy and kinetic energy of the gas in front of the shock wave increase, but the gas behind the shock wave does work by that much, so
The temperature of the driving gas blown into the exothermic tube 6 decreases due to adiabatic expansion.Also, the residual gas repeats compression and expansion within the exothermic tube 6, but its entropy increases due to passage of shock waves, tube wall friction, etc. As its temperature increases, the heating tube 6 acts as a heat generator.

As shown in FIG. 2, the area near the inlet 5 becomes a low-temperature zone X, and the area behind it becomes a high-temperature zone Y due to the entropy of residual gas increasing due to the passage of shock waves and pipe wall friction as described above. becomes.

Furthermore, the measured temperature of the exhaust gas 16 detected by the temperature detection terminal 9 and the target temperature set in the target temperature setting device 1o are measured by the comparator 1.
1, if the measured temperature is lower than the target temperature, the opening degree of the valve 14 is increased by the regulator 12, and a part of the supply gas 18 flows to the capacity tank 7 via the valve 14.
A flow is generated from the capacity tank 7 to the inlet 5 in the exothermic tube 6, and from the inlet 5, in addition to the drive gas whose temperature has decreased due to adiabatic expansion in the exothermic tube 6, there is also high temperature gas in the high temperature zone Y of the exothermic tube 6. Exothermic tube 6 that is exhausted and mixed with the driving gas whose temperature has dropped
The amount of gas from the high temperature zone Y increases, and the temperature of the exhaust gas 16 rises, approaching the target temperature.

Conversely, when the measured temperature of the exhaust gas 16 is higher than the target temperature, the regulator 12 adjusts the opening degree of the valve 14 to be smaller, allowing the temperature to approach the target temperature.

Furthermore, in a state where the supply gas 18 contains moisture, carbon dioxide gas, etc. and the temperature drop of the supply gas 18 by the thermal separation device 1 is large, moisture, carbon dioxide gas, etc.
However, when the regulator 12 fully opens the valve 14 in response to the signal from the defrosting command transmitter 15, the supplied gas 1
8 flows into the capacity tank 7, gas flows from the capacity tank 7 to the inlet 5 in the exothermic tube 6, and the high temperature gas in the high temperature zone Y is exhausted from the inlet 5, effectively removing the solidified accumulation. It is melted away.

When the solidified accumulation is melted and removed, the command to fully open the valve 14 is released and normal operation is resumed.

By adjusting the opening degree of the valve 14 in this way, the temperature of the exhaust gas and the heat generation by the heat generating pipe 6 are controlled by using the heat separated by the heat separation device 1 without using any other heat source. be able to.

In addition, by opening the valve 14 and creating a flow from the capacity tank 7 toward the suction port 5 of the heat generating tube 6, the high temperature zone Y of the heat generating tube 6 is
The solidified build-up can be effectively melted and removed in a very short time using high-temperature gas.

Furthermore, since high temperature gas does not flow through the valve 14, the valve 14
There is no need to make it heat resistant.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a temperature control device of a conventional thermal separator, Fig. 2 is an explanatory diagram illustrating the gas temperature distribution state in the heat generating tube of the thermal separator, and Fig. 3 is a thermal separator according to the present invention. FIG. 2 is an explanatory diagram illustrating an embodiment of the temperature control device of FIG. 1...Thermal separation device, 6...Heating tube, 7
...capacity tank, 17...inlet piping,
a...Piping, b...Valve.

Claims (1)

[Claims] 1. Temperature at which a thermal separation device is turned on, characterized in that piping is provided from the supply gas piping to the thermal separation device to the container at the tip of the heat generating tube, and a valve with a variable opening degree is installed in the middle of the piping. Control device.