KR200317197Y1 - Structure of movable catalystic incinerator for burnning off VOC - Google Patents

Abstract

The present invention relates to a structure of a mobile catalytic incinerator capable of efficiently burning volatile organic compounds generated in various industrial processes.

The structure of the device of the present invention, the casing 11 on the housing; A large diameter supply pipe 12 whose upper end is branched into two pipes; A pair of large diameter tubes (13) (13 ') extending from two branches of the large diameter supply pipe (12) and wound alternately with each other and wound in the form of a coil; A pair of small diameter tubes 14, 14 'extending from the lower portion of the large diameter tube along the central axis of the large diameter tube to a position of the upper end of the large diameter tube; A pair of small diameter discharge pipes 15 and 15 'extending from the lower end of the small diameter pipes 14 and 14' and penetrating the casing 11; A pair of catalytic combustors (16, 16 ') respectively coupled to each upper end of the large diameter tube (13) (13'); The heat exchanger has a double tube coil structure, and the catalytic combustor is located at the inner diameter of the coil. The structure is composed of an electric preheater 17 (17 ') coupled to a lower portion of the catalytic combustor 16, 16'. There are technical features of the design.

The apparatus of the present invention minimizes the heat loss of the combustion gas as the heat exchanger has a coiled double tube structure, and at the same time reduces the volume of the heat exchanger, and unnecessary heat loss in the catalytic combustor by placing the catalytic combustor in the inner diameter of the double tube coil. This has the advantage of being minimized.

Description

Structure of movable catalystic incinerator for burnning off VOC}

The present invention relates to a structure of a mobile catalytic incinerator capable of combusting volatile organic compounds (VOCs) generated in various industrial processes, and more particularly, to a catalytic combustor in a catalytic incinerator of volatile organic compounds. An electric preheater is installed in the inner diameter of the heat exchanger to reduce heat loss, and the heat exchanger has a coil-shaped spiral double tube structure that minimizes the volume occupied by the heat exchanger. will be.

Where organic solvents are used, such as paint manufacturing, printing, painting and coating, and laundry factories, volatile organic compounds (hereinafter referred to as 'VOC') are inevitably emitted during the production of products, such as thinners and solvents. The VOC, which is highly volatile and exists in the form of harmful gases in the air, dissolves oil or fat well, and when it gets on the skin, it passes through the fat and is absorbed into the body, and easily evaporates to be absorbed into the body through breathing. It is highly flammable and has a good fire property.

More than 400 kinds of VOCs are known at present, and are classified into hydrocarbons, halogenated hydrocarbons, alcohols, aldehydes, ethers, esters, ketones, glycol derivatives, and others according to chemical structures. Most of them are addictive and harmful to the brain and nerves. They are harmful substances that cause anesthesia and headaches. They are so toxic that they cause damage to the nerves, respiratory organs, digestive organs and various organs when absorbed by the human body through the skin or respiratory system. It causes poisoning of organic solvents and causes environmental pollution such as cancer.

Therefore, since the VOCs discharged from various industrial processes should be treated, incineration methods using catalytic combustion, which have good processing performance and low operating cost, have been adopted among various methods of treating VOCs.

Since the apparatus for catalytic combustion of VOC is a catalytic incinerator, most of the VOC catalytic incinerators developed so far have been manufactured as a facility suitable for processing of a large flow rate, and thus, the size and cost of installation are high.

In addition, the VOC incineration method using the catalytic combustion has a very small amount of auxiliary fuel compared to the conventional combustion method, but since the catalytic combustion reaction occurs at a certain temperature or more, the concentration of VOC is very low, for example, based on toluene. Below 2000ppm, it is sometimes necessary to supply additional heat for incineration.

That is, if the temperature of the VOC flowing into the catalyst bed from the catalyst incinerator is low, the catalytic combustion reaction rate is low, so that the VOC is not completely incinerated. Therefore, in order to catalytically burn the VOC generated in the process, the VOC must be sufficiently heated to the catalytic combustion reaction temperature. do.

Therefore, when the concentration of VOC is high, the heat of combustion is large, so that the exhaust gas and the inlet gas may be exchanged to preheat the inlet gas containing VOC. Since it is not possible to provide a heating device that can additionally supply the necessary heat, a flame burner or an electric heater is generally used as a heating device. In a small device, an electric heater is used a lot, and a VOC using a double tube heat exchanger is used. In the catalytic incinerator, a catalytic combustor and a preheater are attached to one end of the heat exchanger.

In the VOC catalytic incinerator as described above, heat is generated in the catalytic combustor and the preheater, and the catalytic combustor and the preheater are not only the highest in the catalyst combustor and the preheater but also the heat loss is the highest. It is very important to reduce the heat loss in the part and to recover as much heat as possible from the combustion reaction of the VOC.

Therefore, when the amount of heat generated by incineration is low due to the low concentration of VOC, additional heat can be reduced to recover as much heat as possible.However, if the heat recovery area is increased by increasing the heat transfer area, the heat exchanger increases in size. This will rise excessively.

Further, even if catalytic combustion is introduced to incinerate low concentration of VOC, additional heat supply problem has to be solved, so it is relatively easy to preheat and install countercurrent heat exchanger to make full use of the heat generated by VOC combustion. A catalytic combustion type volatile organic compound incinerator for improving heat recovery rate is disclosed in Korean Utility Model Application No. 2001-47073.

However, in the general VOC catalytic incineration apparatus including the incineration apparatus, the insulation layer is thickened to reduce the heat lost in the combustion catalyst installation portion having the highest temperature and the most heat loss. In the case of the heat exchanger, since the length of the double pipe required to obtain the heat transfer area required for the VOC catalytic incinerator is 10 m or more, the volume becomes too large and it is very difficult to use for movement.

The present invention was devised to solve all the problems of the conventional VOC incinerator, and it is possible to reduce the heat loss and improve the volume of the incinerator by improving the structure of the heat exchanger and the location of the catalytic combustor provided in the VOC incinerator. It is an object of the present invention to provide a structure of a VOC catalytic incineration apparatus that can be easily used for moving by reducing it.

1 is a structural diagram of one embodiment of the present invention.

((Explanation of symbols for main part of drawing))

11. Casing 12. Large diameter supply pipe

13,13 '. Grand Palace 14,14 '. Small diameter

15,15 '. Small diameter discharge line 16,16 '. Catalytic combustor

17,17 '. Electric preheater

The above object of the present invention is achieved by a coiled double tube structure of a heat exchanger and a catalytic combustor mounted structure positioned on the upper inner diameter of the coiled double tube.

The present invention mobile volatile organic compound catalytic incineration device, the heat exchanger provided therein is composed of a pair of double pipes, each double pipe is a structure in which the small diameter pipe is located on the same axis line in the inner center of the large diameter pipe, It is more preferable to use a small diameter tube as a corrugated tube to increase heat exchange efficiency.

The pair of double tubes each having a coil shape has two coils overlapping each other like one coil, and a catalytic combustor and an electric preheater are coupled to an upper end of each double tube.

At this time, the upper end of each double pipe is bent to the inner diameter side of the double pipe coil, the catalytic combustor and electric preheater coupled to the bar is located in the inner diameter of the double pipe coil, the present invention in the coil structure of the double pipe and the position of the catalytic combustor There are technical features.

As described above, as the double pipe forms a coil, it is possible to minimize the volume increase of the VOC catalyst incineration device due to the increase in the heat transfer area, and to suppress the loss of combustion heat by placing the catalytic combustor in the inner diameter of the double pipe coil. .

The details of the purpose and technical constitution according to the present invention, including the effect thereof, will be clearly understood by the following description with reference to the drawings showing preferred embodiments of the present invention.

Figure 1 shows a schematic structural diagram of an embodiment VOC catalytic incineration apparatus of the present invention.

As shown, the apparatus of the present invention comprises: a casing 11 on an enclosure; A large diameter supply pipe 12 connected to the lower part of the casing from the outside of the casing and branched into two tubes at the upper end; A pair of upper ends of the large diameter supply pipes 12 extend from two branches and alternately overlap each other while winding in the form of a coil to the upper portion of the casing, and each upper end is bent toward the inner diameter side of the coil to have a "-" shape. Large diameter tubes 13 and 13 '; The lower end penetrates the lower part of the large diameter tube 13, 13 'from the outside to the inside, and extends from the lower end of the large diameter tube 13 to the upper end position of the large diameter tube along the central axis of the large diameter tube 13, 13'. A pair of small diameter pipes 14, 14 ', which together with each large diameter pipe form a double pipe structure; A pair of small diameter discharge pipes 15 and 15 'extending from the lower end of the large diameter pipe 14, 14' and passing through the casing 11, and then bent toward the upper casing; A pair of catalytic combustors (16, 16 ') coupled to respective upper ends of the large diameter tubes (13) and (13') and positioned at the inner diameter side of the large diameter tube coil; It has a structure composed of electric preheaters 17 and 17 'coupled to the lower portion of the catalytic combustor 16 and 16'.

Looking at the process of burning the VOC through the apparatus of the present invention having the structure as described above are as follows.

Exhaust gas including VOC generated in the workplace flows from the outside through the large diameter supply pipe 12 to the lower side of the casing, and then branched at its upper end, wound like a coil, and extended to the upper portion of the casing 11. (13) and 13 'are moved from the lower side to the upper side of the casing and fed to the catalytic combustors 16 and 16'.

At this time, the exhaust gas flows from the lower side to the upper side through the space between the inner circumferential surface of the large diameter tube 13, 13 'and the outer peripheral surface of the small diameter tube 14, 14', and the VOC is combusted in the catalytic combustor connected to the upper end. The combustion gas proceeds from the upper side to the lower side of the casing through the hollow of the small diameter pipes 14 and 14 'and is connected to the lower end of the large diameter pipes 13 and 13' and the lower side small diameter pipes 14 and 14 '. It is discharged to the outside through the small-diameter discharge pipe 15, 15 '.

Therefore, the exhaust gas supplied through the large diameter tube is wrapped around the combustion gas that proceeds to the lower side after the temperature is increased by the combustion in the catalytic combustor, and is preheated before being burned in the catalytic combustor by receiving the heat of the combustion gas. For example, when the temperature of the exhaust gas is too low or the concentration of VOC contained in the exhaust gas is so low that the temperature of the combustion gas is not high, the temperature of the combustion gas is increased by operating an electric preheater.

In addition, in order to efficiently transfer the heat of the combustion gas to the exhaust gas, it is necessary to increase the heat exchange area of the exhaust gas and the combustion gas, and it is preferable to use a corrugated pipe as the small diameter pipe.

In addition, the structure of the inventive catalyst incineration apparatus having the above-described structure may branch the upper end portion of the large diameter supply pipe 12 into one or more according to its capacity, and when the small capacity is sufficient, Use one catalytic combustor without branching or branching into two branches or branching into three or more branches as in the above embodiment, and then configuring three or more coils from each branch to use three or more catalytic combustors. You can also

As described above, the device of the present invention can minimize the heat loss of the combustion gas and reduce the volume of the heat exchanger by minimizing the heat loss of the combustion gas by using the heat exchanger as a coiled double tube, and increase the heat transfer area by using the small diameter tube as the corrugated pipe. In addition to maximizing the transfer efficiency, it is advantageous to minimize unnecessary heat loss in the catalytic combustor by placing the catalytic combustor in the inner diameter of the double tube coil.

Claims (4)

A volatile organic compound catalytic incinerator having a catalytic combustor and a heat exchanger, comprising: a casing on an enclosure; A large diameter supply pipe 12 branching at least one upper end portion from the bottom of the casing; Large diameter pipes 13 and 13 'of the same number as the number of branches of the large diameter supply pipe 12 are alternately extended from each branch of the large diameter supply pipe 12 and wound in the form of a coil to the upper side of the casing. ; Small diameter pipes 14 and 14 which have a lower end penetrating the lower part of each of the large diameter pipes 13 and 13 'from the outside to extend along the central axis of the large diameter pipe from the lower end of the large diameter pipe to the upper end position of the large diameter pipe. ')and; Small-diameter discharge pipes 15 and 15 'extending from the lower end of the large-diameter tube 14, 14' of each of the small-diameter tubes 14, 14 'and penetrating through the casing 11; A catalytic combustor (16) (16 ') coupled to an upper end of each of the large diameter tubes (13) (13'); And a structure consisting of an electric preheater (17) (17 ') coupled to a lower portion of each of the catalytic combustors (16) and (16'). The structure of a mobile volatile organic compound catalytic incinerator according to claim 1, wherein the upper end of the large diameter supply pipe (12) is branched into one of two branches and three branches. The structure of a mobile volatile organic compound catalytic incinerator according to claim 1, wherein the small diameter pipe (14, 14 ') is a corrugated pipe. The structure of a mobile volatile organic compound catalytic incinerator according to claim 1, wherein the catalytic combustor (16) is located at an inner diameter portion of the coil-type large diameter tube (13).