KR20240003610A - Temperature maintenance apparatus for chemical tank and in stallation method therof - Google Patents

Abstract

In the present invention, an inner tank for storing a material, an outer shell that surrounds and protects the inner tank at a certain gap, a plurality of devices arranged at regular intervals around the outer circumference of the inner tank, and converting electrical energy into heat to heat the contents in the inner tank. A heating element, a heat dissipation pad attached respectively between the surface perimeter of the inner tank and the heating element, and dissipating heat generated from the heating element to the inner tank to maximize heat conduction, and an insulation that wraps around the outside of the heating element to prevent loss of heat generated from the heating element. Disclosed is a transport tank temperature maintenance device including a pad, a cover surrounding the heating element, the heat dissipation pad, and the insulating pad to support and protect the heating element, and a controller that detects the temperature of the contents in the inner tank and controls the heating temperature of the heating element. .

Description

Temperature maintenance apparatus for chemical tank and in stallation method therof}

The present invention relates to a device for maintaining a constant internal temperature of a transport tank for storing and transporting various chemicals such as MDI. More specifically, the present invention relates to a device that maintains the contents at a uniform temperature without deviation at any location in the internal space of the transport tank. It relates to a temperature maintenance device and its installation method.

Methylene Diphenyl Diisocyanate (MDI) is a mixture of isomers and is mainly used in the production of flexible polyurethane foam and rigid polyurethane foam. In general, MDI is largely classified into PURE MDI, CRUDE MDI, and MODIFY MDI.

PURE MDI is widely used as a raw material for the manufacture of industrial products, household goods, and sports goods such as elastic fibers (spandex), shoe soles, thermoplastic elastomers (TPU Elastomers), synthetic leather, paints, and adhesives.

CRUDE MDI is widely used in various fields such as hard polyurethane foam fields such as insulation materials for frozen warehouses and refrigerators, building insulation materials, and cold insulation materials for liquefied natural gas carriers, semi-rigid polyurethane fields such as automobile interior materials, adhesives, paints, and waterproof flooring materials. .

MODIFY MDI is a product that liquefies solid PURE MDI for convenient use.

This MDI can solidify at a certain temperature depending on whether it is a mixture, and if the viscosity increases due to temperature changes, it is difficult to unload and must be transported in a solution state. For this, materials with excellent insulation performance are used to transport it. A method of maintaining the temperature inside the tank is mainly adopted.

However, this is due to the structural characteristics of minimizing heat conduction by inserting an insulation material into the space between the inner tank (tank on the inside) and the outer tank (tank on the outside) that constitutes the transport tank and maintaining a vacuum to minimize direct contact between the inner tank and the outer tank as much as possible. There are bound to be limits to maintaining temperature.

On the other hand, in the method of maintaining the viscosity of the contents constant by providing a heating device in the transport tank and directly heating the contents to an appropriate temperature during transportation or before unloading, it is difficult to remove foreign substances adhering to the surface of the heating device, so it is difficult to remove the heating device when used for a long period of time. There is a problem in that the efficiency of the device is reduced and local overheating occurs, resulting in severe internal temperature differences.

Therefore, a new technology is needed that can increase the safety of the transport tank and maintain the entire contents at a uniform temperature without any deviation in the internal temperature.

The background or prior art described above is information possessed by the present inventor or acquired in the process of deriving the present invention, and is only intended to help understand the technical significance of the present invention, and is information to which this invention belongs before filing the application for the present invention. It should be noted that this does not mean that it is a widely known technology in the field.

KR Patent Registration 10-1721160 B1 (2017.03.23) KR Patent Registration 10-0990743 B1 (2010.10.22) KR Patent Registration 10-0965224 B1 (2010.06.14) KR Patent Registration 10-2009-0059579 A (2009.06.11)

Accordingly, the present inventor comprehensively considered all of the above-mentioned matters, and at the same time, with the idea of solving the technical limitations and problems of the existing transport tank temperature maintenance device technology, the present inventor proposed a method of providing heat without compromising the safety of the transport tank that stores and transports MDI. This is distributed evenly, preventing local overheating, and is evenly heated to the set temperature, thereby maintaining the entire contents at a uniform temperature without deviation at any position in the internal space. A transport tank temperature maintenance device of a new structure and the same. As a result of constant research and effort to develop an installation method, the present invention was created.

Therefore, the technical problem and purpose to be solved by the present invention is to provide a transport tank temperature maintenance device and an installation method thereof that can maintain the entire contents at a uniform temperature without deviation at any position in the interior space without impairing safety. It's about doing it.

Here, the technical problems and objectives to be solved by the present invention are not limited to the technical problems and objectives mentioned above, and other technical problems and objectives not mentioned can be understood from the description below as a matter of common knowledge in the technical field to which the present invention pertains. Those who have it will be able to understand it clearly.

Specific means according to the aspect of the present invention for effectively achieving a specific technical purpose while embodying a new idea for solving the technical problem of the present invention as described above include an inner tank for storing a material, the inner tank and An outer shell that surrounds and protects at a certain gap, a heating element disposed at regular intervals around the outer circumference of the inner tank, and converts electrical energy into heat to heat the contents in the inner tank, between the outer circumference of the inner tank and the heating element. A heat dissipation pad that is respectively attached to the heating element and maximizes heat conduction by dissipating heat generated from the heating element into the inner tank, an insulating pad that surrounds the outside of the heating element to prevent loss of heat generated in the heating element, the heating element, the heat dissipating pad, and the insulation. A transport tank temperature maintenance device is provided, which includes a cover surrounding each pad to support and protect it, and a controller that detects the temperature of the contents in the inner tank and controls the heating temperature of the heating element.

As a result, the present invention does not impair the safety of the transport tank that stores and transports MDI, but heat is distributed evenly, preventing local overheating, and is evenly heated to the set temperature, so that the entire contents are maintained at a uniform temperature without deviation at any location in the internal space. It can be kept constant.

In addition, in a preferred aspect of the present invention, the heating element is composed of a PTC heater whose resistance value changes according to temperature changes and reduces the amount of current when a certain temperature is reached to maintain the appropriate temperature constant, and the heat dissipation pad is made of a glass fiber tape, and the insulating pad may be made of a tape coated with a silicone resin on braided glass fiber.

In addition, a preferred aspect of the present invention is to further include an insulating material that is filled in the gap between the inner tank and the outer shell and prevents heat conduction through direct contact between the inner tank and the outer shell. Heat transfer efficiency can be increased by increasing the heat transfer area of the heating element placed between the and the outer shell.

According to the technical idea and embodiment of the present invention, which is based on a unique solution to solve the above technical problems, the heat transfer area is increased by installing a heating element in the space between the inner tank and the outer shell and filling it with an insulating material, thereby increasing the heat transfer efficiency. can increase.

In other words, heat is distributed evenly without impairing the safety of the inner tank, preventing local overheating and heating evenly to the set temperature, thereby maintaining the entire contents at a uniform temperature without deviation at any location in the inner space of the inner tank.

Here, the effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

Figure 1 is a perspective view showing a transport tank temperature maintenance device according to an embodiment of the present invention.
Figure 2 is a cross-sectional view showing a transport tank temperature maintenance device according to an embodiment of the present invention.
Figure 3 is a local cross-sectional view showing a transport tank temperature maintenance device according to an embodiment of the present invention.
Figure 4 is an electrical wiring circuit diagram of a transport tank temperature maintenance device according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the attached drawings.

Prior to this, the terms described below are defined in consideration of their functions in the present invention, and should be interpreted as concepts consistent with the technical idea of the present invention and meanings commonly used or commonly recognized in the relevant technical field.

Additionally, if it is determined that a detailed description of a known function or configuration related to the present invention may obscure the gist of the present invention, the detailed description will be omitted.

The drawings attached herein may be shown with exaggerated or simplified portions to facilitate explanation and understanding of the composition and operation of the technology, and each component in the drawings does not exactly match the actual size and shape. Reveal.

In addition, in this specification, the term and/or refers to a combination of a plurality of related described items or includes any item among a plurality of related described items, and when a part includes a certain element, this means that it is specifically opposed to Unless otherwise stated, it does not mean excluding other components, but rather including other components.

In other words, terms such as 'include' or 'have' used in this specification mean the existence of a feature, number, step, operation, component, part, or combination thereof, and do not mean the existence of one or more of them. It should be understood that the presence or addition of other features, numbers, step operation components, parts, or combinations thereof is not excluded.

In addition, terms such as top, bottom, upper surface, lower surface, or upper, lower, upper, lower, front and back, left and right are used for convenience to distinguish the relative positions of each component. For example, the upper part of the drawing may be referred to as upper and the lower part as lower, the longitudinal direction may be referred to as the front-to-back direction, and the width direction may be referred to as the left-right direction.

Additionally, terms such as first and second may be used to describe various components. That is, terms such as first, second, etc. may be used only for the purpose of distinguishing one component from another component. For example, the first component may be named the second component as long as it does not deviate from the scope of protection of the present invention, and the second component may also be named the first component.

As shown in Figures 1 to 4, the main elements constituting the transport tank temperature maintenance device (T) according to an embodiment of the present invention include an inner tank (10), an outer shell (20), a heating element (30), and a heat dissipation pad (40). ), insulation pad 50, cover 60, and controller 70.

The inner tank 10 is formed as a cylindrical airtight structure with an overall empty interior to provide an accommodation space for storing and transporting a certain amount of materials such as MDI.

In addition, separate contents inlet and outlet are provided at the upper part of the inner tank 10.

That is, the inner tank 10 is a pressure vessel structure in which a stainless steel plate or alloy having excellent chemical resistance, corrosion resistance, heat resistance, etc. is rolled into a cylindrical shape and finished by welding end plates to both ends of the cylindrical shape. It consists of overlapping with a certain space within the outer shell (20).

The outer shell 20 surrounds the inner shell 10 with a certain gap and is formed as a cylindrical airtight structure with an overall empty interior to protect it from the outside.

That is, the outer shell 20 is made by rolling a stainless steel plate with excellent heat resistance and weldability into a cylindrical shape to prevent the contents from leaking due to damage to the inner tank 10, and end plates are welded to both ends of the cylindrical shape. It is formed as a double container outer cylinder structure that completely surrounds the inner tank 10 by attaching it with a .

And the outer shell 20 is surrounded by the inner tank 10 and the underframe 90 with a closed space therebetween.

In other words, the underframe 90 serves to protect and support the transport tank temperature maintenance device (T) structure from external shock.

Here, the underframe 90 supports the inner tank 10 and the outer shell 20 at a certain height with respect to the ground (floor) and connects section steel, bars, steel pipes, iron plates, etc. to stably support and sustain them without moving forward, backward, left, and right. And it is preferable to assemble it to form a long skeleton front and back.

A plurality of heating elements 30 are arranged at regular intervals around the outer circumference of the inner tank 10 to heat the contents of the inner tank 10 by converting electrical energy into heat.

That is, a plurality of heating elements 30 are radially attached to the outer circumference of the inner tank 10, so that when current is supplied, heat of a predetermined temperature can be generated to heat the contents of the inner tank 10.

In addition, current supply to the heating elements 30 can be controlled by the controller 70 connected to each heating element 30.

Additionally, the heating element 30 may include a temperature sensor that measures the heating temperature.

Here, the heating element 30 is preferably made of a PTC heater whose resistance value changes according to temperature changes and reduces the amount of current when a certain temperature is reached to maintain the appropriate temperature constant.

The heat dissipation pad 40 is attached between the surface of the inner bath 10 and the heating element 30 to maximize heat conduction by dissipating heat generated from the heating element 30 to the inner bath 10.

Here, the heat dissipation pad 40 may be made of glass fiber tape.

As another example, the glass fiber tape is made of a double layer of first and second glass fiber tapes in close contact with each other, and a carbon woven plate made of carbon yarn is placed between them to make them adhered together to enable rapid and even heat conduction. You can.

The insulating pad 50 surrounds the outside of the heating element 30 to prevent loss of heat generated from the heating element 30.

Here, the insulating pad 50 is preferably made of a tape coated with silicone resin on braided glass fiber.

The cover 60 is mounted around the surface of the inner tank 10 by a joining method such as bolting or welding to surround, support, and protect the heating element 30, the heat dissipation pad 40, and the insulating pad 50, respectively.

That is, the cover 60 can be firmly attached to the periphery of the surface of the inner tank 10 with the heating element 30, the heat dissipation pad 40, and the insulating pad 50 in close contact with each other.

Here, the cover 60 is preferably formed by bending a stainless steel plate with excellent heat resistance and weldability.

The controller 70 is mounted on the frame 90 to detect the temperature of the contents in the inner tank 10 and control the heating temperature of the heating element 30.

And the controller 70 is electrically connected to the heating element 30 and a temperature sensor that measures the temperature of the contents in the inner tank 10, respectively.

That is, the controller 70 can operate by receiving power from a battery or an external source, and can adjust the amount of current supplied to the heating element 30 and the operating time according to a predetermined temperature value.

For example, the controller 70 receives the temperature value of the contents of the inner tank 10 from the temperature sensor in real time, compares it with a predetermined temperature value, and supplies current to the heating element 30 until the temperature values are the same or close to each other. Control and heat, or receive the actual temperature value of the heating element 30 from a temperature sensor in real time, compare it with a predetermined temperature value, and control the current supply to the heating element 30 until the temperature values are the same or close to each other. By heating, the temperature of the contents in the inner tank 10 can be kept constant at the set temperature.

Here, the controller 70 can control the overall operation of the heating element 30 by operating it organically and sequentially using a pre-input microprocessor or PLC-type setting program (control program contained in a logic computer).

In addition, the controller 70 may be provided in the form of an operation panel that allows the operator to directly manipulate switches, etc. or select and input specific commands, and may apply a signal according to the operation and opening and closing of a push switch, etc., and may be provided with a heating element ( 30) It may be composed of a control system that monitors the operation of the system and obtains a target result or value.

The insulation material 80 prevents heat conduction through direct contact between the inner tank 10 and the outer shell 20, and also maintains the temperature of the contents in the inner tank 10 for a long time. 20) The gap between them is filled.

Here, it is desirable to fill the insulation 80 with a thickness of 50 mm or more without gaps using glass fiber to prevent heat energy from escaping.

The transport tank temperature maintenance device (T) according to the embodiment of the present invention configured as described above is installed by arranging the heating elements 30 radially in the space between the inner tank 10 and the outer shell 20 and filling the insulation material 80. Heat transfer efficiency can be improved by increasing the heat transfer area.

Moreover, since heat is evenly transmitted to the inner tank 10, local overheating does not occur, and the temperature of the entire contents in the inner tank 10 can be maintained uniformly without deviation by being evenly heated to the set temperature.

Meanwhile, the installation method of the transport tank temperature maintenance device (T) according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3 as follows.

First, the outer circumference of the inner tank 10 is protected by surrounding it with the outer shell 20, and the space between the inner tank 10 and the outer shell 20 is filled with an insulating material 80 that prevents heat conduction. After preparing the tank, the outer skin 20 and the insulation material 80 in the area where the heating element 30 is to be placed are partially cut to expose the left and right surfaces of the inner tank 10.

Next, a plurality of mounting brackets 61, consisting of a pair, are arranged by welding and attaching them to the left and right surfaces of the inner tank 10 at regular radial intervals.

Next, heat dissipation pads 40 that maximize heat conduction are attached to the outer circumference of the inner shell 10 located between a pair of mounting brackets 61, and then each heat dissipation pad 40 is placed on the surface of the heat dissipation pad 40. A heating element 30 is attached to heat the contents in the inner tank 10 by converting electrical energy into heat.

Next, an insulating pad 50 is attached to the outside of the heating element 30 to prevent loss of heat generated from the heating element 30, and a controller 70 that controls the heating temperature of the heating element 30 is installed on the heating element 30. ) respectively.

Next, both ends of the cover 60 surrounding the heating element 30, the heat dissipation pad 40, and the insulating pad 50 are fixed to a pair of mounting brackets 61 using a joining method such as bolting or welding. .

Finally, the initially cut outer shell 20 and part of the insulation material 80 are attached to the original to insulate and seal the outer perimeter of the inner tank 10.

At this time, the cut portion of the outer skin 20 can be sealed by adding a tie-plate and welding it.

Meanwhile, the present invention is not limited to the above-described embodiments and the accompanying drawings, and may be modified and applied in various ways not exemplified without departing from the technical spirit of the present invention. It is clear to those skilled in the art that the present invention can be broadly applied by replacing components and changing it to other equivalent embodiments.

Therefore, contents related to modifying and applying the technical features of the present invention should be construed as being included within the technical idea and scope of the present invention.

10: inner tank 20: outer shell
30: heating element 40: heat dissipation pad
50: insulation pad 60: cover
70: Controller 80: Insulating material
90: Underframe T: Transport tank

Claims (5)

an inner tank (10) for storing materials;
an outer shell (20) that surrounds and protects the inner tank (10) with a certain gap;
A plurality of heating elements (30) arranged at regular intervals around the outer circumference of the inner tank (10) and converting electrical energy into heat to heat the contents of the inner tank (10);
A heat dissipation pad (40) attached between the outer circumference of the inner tank (10) and the heating element (30), and dissipating heat generated from the heating element (30) to the inner tank (10) to maximize heat conduction;
An insulating pad 50 that surrounds the outside of the heating element 30 to prevent loss of heat generated from the heating element 30;
A cover 60 surrounding the heating element 30, the heat dissipation pad 40, and the insulating pad 50 to support and protect each; and
A controller 70 that detects the temperature of the contents in the inner tank 10 and controls the heating temperature of the heating element 30;
A transport tank temperature maintenance device comprising a.
According to paragraph 1,
The heating element 30 is,
It consists of a PTC heater whose resistance value changes according to temperature changes and reduces the amount of current when a certain temperature is reached to maintain a constant appropriate temperature.
The heat dissipation pad 40 is,
Made of glass fiber tape,
The insulation pad 50 is,
A transport tank temperature maintenance device characterized by consisting of a tape coated with silicone resin on braided glass fiber.
According to paragraph 1,
A thermal insulation material (80) filled in the gap between the inner shell (10) and the outer shell (20) and preventing heat conduction through direct contact between the inner shell (10) and the outer shell (20);
A transport tank temperature maintenance device further comprising:
According to paragraph 2,
A transfer tank temperature maintenance device characterized in that the glass fiber tape is made up of a double layer of first and second glass fiber tapes in close contact with each other and further includes a carbon woven plate made of carbon yarn between them.
How to install a transport tank temperature maintenance device consisting of the following processes.
(A) The outer perimeter of the inner tank 10 is protected by surrounding it with the outer shell 20, and the space between the inner shell 10 and the outer shell 20 is filled with an insulating material 80 that prevents heat conduction. A process of exposing the left and right surfaces of the inner tank 10 by partially cutting the outer skin 20 and the insulation material 80 of the transport tank;
(B) A process of attaching and arranging a plurality of mounting brackets 61, which are made up of two pairs, at regular intervals radially, on the left and right surfaces of the inner tank 10;
(c) a process of attaching heat dissipation pads 40 that maximize heat conduction to the outer circumference of the inner tank 10 located between the pair of mounting brackets 61;
(d) a process of attaching a heating element 30 to the surface of the heat dissipation pad 40, which converts electrical energy into heat and heats the contents of the inner tank 10;
(E) A process of attaching an insulating pad (50) to the outside of the heating element (30) to cover each of the heating elements (30) to prevent loss of heat generated from the heating element (30);
(F) a process of connecting a controller 70 that controls the heating temperature of each heating element 30 to the heating element 30;
(g) a process of fixing a cover 60 surrounding the heating element 30, the heat dissipation pad 40, and the insulating pad 50 to the pair of mounting brackets 61, respectively;
(H) A process of insulating and sealing the outer periphery of the inner tank 10 by attaching the outer shell 20 and a portion of the insulation material 80 cut in the process (a) back to the original;

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