JP3136497U - Emergency cooling mechanism in chemical reactor - Google Patents

Abstract

The present invention provides an emergency cooling mechanism in a chemical reaction apparatus capable of quickly and accurately cooling a reaction vessel even in an emergency where the reaction temperature has rapidly increased.
A reaction vessel 1 containing a liquid A to be reacted; a heated water tank 2 capable of heating the liquid A in the reaction vessel 1; and surrounding and supporting at least the outer periphery of the liquid agent containing portion of the reaction vessel 1. A ring-shaped pipe member which is capable of cooling the liquid agent A in the reaction vessel 1 by flowing the refrigerant liquid to the outer peripheral surface of the reaction vessel 1; a refrigerant recovery device 4; On the basis of the current temperature signal of the liquid agent A from the temperature sensor 51 installed in, a cooling signal is output when the threshold value is exceeded, the heated water tank 2 is lowered and retracted, and the refrigerant recovery device 4 is operated. At the same time, it includes a control controller capable of conducting and ejecting the refrigerant liquid from the inlet 32 into the shower ring 3 by operating a solenoid valve by a sequencer.
[Selection] Figure 1

Description

  The present invention is an improvement of a chemical reaction device, more specifically, a chemical structure that has a simple structure and can cool a reaction vessel quickly and accurately even in an emergency in which the reaction temperature suddenly rises. The present invention relates to an emergency cooling mechanism in a reactor.

  As is well known, in experiments involving chemical reactions such as polymerization reactions and condensation reactions, the speed of the chemical reaction is greatly influenced by temperature, pressure, concentration, and other external conditions. These conditions need to be accurately and quickly adjusted.

  In particular, in a chemical reaction with exotherm, the reaction rate often changes sensitively to temperature, and the reaction rate increases if the temperature in the reaction system is not adjusted to an appropriate range among the above conditions. Therefore, the temperature control in an emergency in such a chemical reaction, in particular, the cooling operation needs to be performed quickly.

  Therefore, the present applicant, as a device for controlling the temperature of this type of exothermic chemical reaction, provided a cooling jacket at the top of the periphery of the reaction vessel for cooling, and provided a heating tank below the reaction vessel. A chemical reactor was developed that controls the temperature by moving the heating tank in the vertical direction and changing the contact area between the hot water in the heating tank and the lower outer surface of the reaction vessel (see Patent Document 1). .

However, in such an apparatus, when the temperature in the reaction vessel suddenly changes, the reaction vessel is evacuated by moving the heating tank up and down and then frozen by the cooling jacket. Due to the endothermic effect, a time lag is inevitably generated and a sufficient response cannot be obtained.
Japanese Patent Laid-Open No. 3-86251 (page 4-5, FIG. 1-2)

  The present invention has been made in view of the above-described drawbacks of conventional chemical reaction apparatuses, and the object of the present invention is a simple structure and a rapid reaction temperature. An object of the present invention is to provide an emergency cooling mechanism in a chemical reaction apparatus that can cool a reaction vessel quickly and accurately even in an elevated emergency.

  Means adopted by the present inventors for solving the above-described problems will be described with reference to the accompanying drawings.

That is, the present invention comprises a reaction vessel 1 containing a liquid A to be reacted;
A water tank that is disposed directly below the reaction vessel 1 so as to be movable up and down. The tank contains a heat transfer fluid H, and the reaction vessel 1 is brought into contact with the heat transfer solution H to thereby react the reaction vessel 1. A heated water tank 2 capable of heating the liquid agent A therein;
It is a ring-shaped pipe member that surrounds and is supported by at least the outer periphery of the reaction container 1 of the reaction vessel 1, and has an inlet 32 for supplying the refrigerant liquid C into the pipe, and the refrigerant liquid C A shower ring 3 in which ejection holes 31, 31... That can be ejected are arranged, and the coolant A can flow along the outer peripheral surface of the reaction vessel 1 to cool the liquid agent A in the reaction vessel 1;
When the heated water tank 2 is lowered to the lower limit of the movable range, the wound and stored sheet body 41 has a required slope and is drawn out in a curtain shape in a substantially horizontal direction and can be deployed below the shower ring 3. The refrigerant recovery device 4 is configured to receive the refrigerant liquid C ejected from the shower ring 3 on the sheet body 41 and to be discharged from a discharge path 42 disposed on the lower side of the sheet body 41. When;
Based on the current temperature signal of the liquid agent A from the temperature sensor 51 installed in the reaction vessel 1, the current temperature is compared with a threshold value, and a cooling signal is output when the threshold value is exceeded. Based on the signal, the heated water tank 2 is lowered and retracted, the refrigerant recovery device 4 is operated, and the solenoid valve is operated by the sequencer to conduct the refrigerant liquid C from the inlet 32 into the shower ring 3. The emergency cooling mechanism in the chemical reaction apparatus was completed by adopting the technical means of including the control controller 5 capable of being ejected.

  Further, in order to solve the above-mentioned problems, the present invention provides a heat exchange area with the refrigerant liquid C that contacts the surface of the reaction vessel 1 by forming the outer peripheral surface of the reaction vessel 1 in an uneven shape in addition to the above means as necessary. Adopted technical means to increase.

  Furthermore, in order to solve the above-mentioned problems, the present invention employs technical means of heating the heat medium liquid H with a heater and keeping it at a constant temperature in the heated water tank 2 in addition to the above means as necessary. did.

  Furthermore, in order to solve the above-described problems, the present invention provides technical means for deploying an air cylinder as a power source as the drive mechanism 43 for the sheet body 41 of the refrigerant recovery device 4 in addition to the above means as necessary. It was adopted.

  According to the present invention, when the current temperature of the liquid agent in the reaction container exceeds the threshold value, the refrigerant liquid is ejected to flow to the outer surface of the reaction container, so that heat exchange with the refrigerant liquid can be performed quickly on the outer peripheral surface of the reaction container. Even in an emergency, the temperature in the reaction vessel can be quickly cooled.

  Moreover, since a curtain-like sheet body can be rapidly developed, the refrigerant liquid does not enter the heated water tank. Therefore, by using the cooling mechanism of the present invention, it has an extremely excellent response to a chemical reaction accompanied by a rapid temperature change, so that the chemical reaction rate can be stably maintained to suppress overreaction, and safety can be improved. Since the improvement can be achieved, it can be said that the practical utility value is very high.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described in more detail with reference to the drawings specifically shown as follows.

  An embodiment of the present invention will be described with reference to FIGS. In the figure, what is indicated by reference numeral 1 is a reaction container, and this reaction container 1 is a container for containing the liquid agent A to be reacted. In this embodiment, a round bottom glass container is adopted.

  Also, what is indicated by reference numeral 2 is a heated water tank, and this heated water tank 2 is a water tank that is freely movable up and down just below the reaction vessel 1, and in which the heat transfer liquid H is contained. The reaction container 1 is accommodated in the heat medium liquid H so that the liquid A in the reaction container 1 can be heated. In this embodiment, warm water is used as the heat transfer fluid H. The upper and lower movable ranges of the heated water tank 2 are detected by a limit switch and driven by a motor driver.

  In addition, about this heating water tank 2, the heat-medium liquid H can be heated with a heater, and can be kept in the heating water tank 2 at constant temperature. By carrying out like this, a fixed calorie | heat amount can be given with respect to the liquid agent A in the reaction container 1. FIG.

  Next, what is indicated by reference numeral 3 is a shower ring, and this shower ring 3 is a ring-shaped pipe member supported so as to surround at least the outer periphery of the liquid agent storage portion of the reaction vessel 1, and a refrigerant is contained in the pipe. In addition to having an inlet 32 for supplying the liquid C, ejection holes 31, 31...

  Then, by ejecting the refrigerant liquid C from the ejection holes 31, 31..., The refrigerant liquid C can be transmitted to the outer peripheral surface of the reaction container 1 to cool the liquid agent A in the reaction container 1. In the present embodiment, cold water such as constant-temperature tap water is used as the refrigerant liquid C, and cold water having a substantially constant temperature is supplied from the inlet 31 into the ring 3 by opening the electromagnetic valve, and is supplied to the ejection hole 31. It can be made conductive.

  What is indicated by reference numeral 4 is a refrigerant recovery device, and when the heated water tank 2 is lowered to the lower limit of the movable range, the sheet body 41 wound and accommodated has a required inclination gradient. It can be drawn out in the form of a curtain in the substantially horizontal direction and deployed below the shower ring 3. Accordingly, the refrigerant liquid C ejected from the shower ring 3 can be received on the sheet body 41, and the sheet body 41 is provided at an inclination, so that the discharge path 42 disposed on the lower side is provided. From which the refrigerant liquid C can be discharged.

  Also, what is indicated by reference numeral 5 is a control controller, and this controller 5 is based on the current temperature and threshold value based on the current temperature signal of the liquid agent A from the temperature sensor 51 installed in the reaction vessel 1. And a cooling signal can be output when the threshold value is exceeded.

  Therefore, the operation process of the cooling mechanism of this embodiment will be described below. First, the chemical reaction of the liquid agent A in the reaction vessel 1 is started. At normal times, the heating medium tank 2 is moved up and down to bring the heat transfer fluid H into contact with the outer peripheral surface of the reaction vessel 1 to control the temperature of the liquid A within a certain range (see FIG. 1). At this time, the case where heat of reaction is generated in the liquid A and the temperature in the reaction vessel 1 abnormally rises becomes a cooling target.

  The temperature of the liquid A in the reaction container 1 is measured in real time by the temperature sensor 51 and is transmitted to the controller 5 as a current temperature signal. Then, the current temperature is compared with the threshold value by the current temperature signal, and when the threshold value is exceeded, a cooling signal is output from the controller 5, and the table of the heated water tank 2 is first lowered based on this cooling signal. . Thereby, as an initial stage treatment, the contact area between the outer surface of the reaction vessel 1 and the heat transfer fluid H can be reduced and completely retracted (see FIG. 2) to suppress the reaction heat of the liquid agent A. .

  Next, when the heated water tank 2 is lowered to the lower limit of the movable range, the sheet body 41 of the refrigerant recovery device 4 is drawn out in a curtain shape in a substantially horizontal direction (see FIG. 3). This sheet body 41 is wound and housed near the heated water tank 2 and the shower ring 3, and is provided with a required inclination gradient (see FIG. 4).

  In the present embodiment, the drive mechanism 43 for driving the sheet body 41 of the refrigerant recovery device 4 can be instantaneously deployed by using an air cylinder as a power source, and the refrigerant liquid C can be used as the heat transfer liquid tank 2. You can prevent it from entering. In addition, limit ranges can be provided at both ends of the drive mechanism 43 to detect the movable range. As the drive mechanism 43, a fluid pressure cylinder such as an air cylinder or a hydraulic cylinder, a motor, or the like can be used.

  Then, by operating the electromagnetic valve by the sequencer, the refrigerant liquid C is conducted from the inlet 32 into the shower ring 3 and ejected. As a result, the refrigerant liquid C can be brought into contact with the outer surface of the reaction vessel 1 while being transferred, so that the reaction heat of the liquid agent A can be suppressed and cooled quickly.

  Then, the refrigerant liquid C ejected from the shower ring 3 and flowing through the outer peripheral surface of the reaction vessel 1 and exchanging heat is spilled on the sheet body 41 and received. Since the sheet body 41 has an inclination, the sheet body 41 is discharged from a discharge path 42 disposed on the lower side of the sheet body 41. At this time, the surface of the sheet body 41 can be subjected to water repellent finishing.

  The above control operation is as shown in the control system diagram shown in FIG.

  The present invention is generally configured as described above. However, the present invention is not limited to the illustrated embodiment, and various modifications can be made within the description of “the scope of claims for utility model registration”. For example, it is possible to increase the heat exchange area with the refrigerant liquid C that contacts the surface by forming the outer peripheral surface of the reaction vessel 1 in an uneven shape.

  Further, the heat medium liquid H can be circulated at a constant speed in the heated water tank 2 through the flow path from the heat medium liquid supplier, and any of these belong to the technical scope of the present invention.

It is an explanatory front view showing the cooling mechanism of the embodiment of the present invention. It is an explanatory front view showing the cooling mechanism of the embodiment of the present invention. It is an explanatory front view showing the cooling mechanism of the embodiment of the present invention. It is explanatory side view showing the cooling mechanism of the embodiment of the present invention. It is an explanatory schematic diagram showing a control system of a cooling mechanism of an embodiment of the present invention.

Explanation of symbols

1 Reaction vessel A Liquid 2 Heated water tank H Heat transfer liquid 3 Shower ring
31 outlet
32 Inlet C Refrigerant liquid 4 Refrigerant recovery device
41 Sheet body
42 Discharge channel
43 Drive mechanism 5 Control controller
51 Temperature sensor

Claims (4)

A reaction vessel 1 containing the liquid A to be reacted;
A water tank that is disposed directly below the reaction vessel 1 so as to be movable up and down. The tank contains a heat medium liquid H, and the reaction container 1 is brought into contact with the heat medium liquid H so that the reaction container 1 A heated water tank 2 capable of heating the liquid agent A therein;
A ring-shaped pipe member that surrounds and is supported by at least the outer periphery of the reaction container 1 of the reaction vessel 1 and has an inlet 32 for supplying the refrigerant liquid C into the pipe, and the refrigerant liquid C is placed on the inner surface of the ring. A shower ring 3 in which ejection holes 31, 31... That can be ejected are arranged, and the coolant A can flow along the outer peripheral surface of the reaction vessel 1 to cool the liquid agent A in the reaction vessel 1;
When the heated water tank 2 is lowered to the lower limit of the movable range, the wound and stored sheet body 41 has a required slope and can be drawn out in a curtain shape in a substantially horizontal direction and can be deployed below the shower ring 3. The refrigerant recovery apparatus 4 is configured to receive the refrigerant liquid C ejected from the shower ring 3 on the sheet body 41 and to be discharged from a discharge path 42 disposed on the lower side of the sheet body 41. When;
Based on the current temperature signal of the liquid agent A from the temperature sensor 51 installed in the reaction vessel 1, the current temperature is compared with a threshold value, and a cooling signal is output when the threshold value is exceeded. Based on the signal, the heated water tank 2 is lowered and retracted, and the refrigerant recovery device 4 is operated, and the solenoid valve is operated by the sequencer to conduct the refrigerant liquid C from the inlet 32 into the shower ring 3. And an emergency cooling mechanism in the chemical reaction apparatus, characterized in that it includes a control controller 5 capable of jetting.
The technical means to do was adopted.   The emergency cooling mechanism in a chemical reaction device according to claim 1, wherein the outer peripheral surface of the reaction vessel (1) is formed in an uneven shape to increase the heat exchange area with the refrigerant liquid (C) in contact with the surface.   The emergency cooling mechanism in the chemical reaction apparatus according to claim 1 or 2, wherein the heat medium liquid H is heated by a heater and maintained at a constant temperature in the heated water tank 2.   The emergency cooling mechanism in the chemical reaction device according to any one of claims 1 to 3, wherein the drive mechanism 43 of the sheet body 41 of the refrigerant recovery device 4 is deployed using an air cylinder as a power source.

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