KR20060020880A - Multi-bed voc oxidation system - Google Patents

Abstract

The present invention provides a plurality of catalyst units which simultaneously perform catalytic oxidation and regenerative oxidation of various kinds of volatile organic compounds, and also provides a heat storage material having a carrier structure, thereby preventing damage to the catalyst material due to the heat storage oxidation. The present invention relates to a volatile organic compound multistage oxidizing device that enables the simplification of the device itself as well as an increase in the oxidation efficiency. For this purpose, a plurality of pipes are formed on both sides so that the organic compound and the organic oxide in which the organic compound is oxidized are processed. A direction control unit for setting a direction, and flows out / inflows organic compounds and organic oxides according to the set direction, and is installed to interfere with each pipe of the direction control unit, and a catalyst unit that catalyzes / oxidizes an organic compound that proceeds through the direction control unit. And an interference chamber installed in the pipe and having a combustion chamber for burning an organic compound. It is provided in communication with the combustion section and said combustion section for combusting an organic compound in the catalyst pour passage is characterized in that when the combustion space is overheated comprising a heat exchanger which is driven to lower the combustion temperature.

Volatile, Organic Compounds, Oxidation, VOC, CO, RTO, RCO, 4way Valve

Description

Volatile Organic Compound Multi-Stage Oxidizer {Multi-bed VOC oxidation system}

1 is a conceptual diagram of a multistage oxidizer according to the present invention;

FIG. 2 is a conceptual view of oxidizing an organic compound in a direction different from that of FIG. 1.

<Explanation of symbols for the main parts of the drawings>

11: first fan 12: second fan

13: 4-way valve 21: heat storage

21a: carrier 22: catalyst material

31: combustion chamber 31a: heater

32: temperature sensing device 41: heat exchanger

41a: third fan 100: multistage oxidizer

The present invention provides a plurality of catalyst units which simultaneously perform catalytic oxidation and regenerative oxidation of various kinds of volatile organic compounds, and prevents damage of the catalyst material due to regenerative combustion, thereby increasing oxidation efficiency and simplifying the construction of the device itself. The present invention relates to a volatile organic compound multistage oxidizer.

Volatile Organic Compounds (hereinafter referred to as "VOCs") refer to substances that cause environmental deterioration and severe odors on a global scale, and those with organic vapor pressure of 10 ^-2 kPa or more. Since the same volatile organic compounds participate in photochemical reactions in the atmosphere to generate secondary pollutants of photochemical oxides, they are regulated to prevent environmental pollution through oxidation.

Representative structures for oxidizing the above-described organic compounds may be categorized into catalytic oxidation, heat storage oxidation, heat storage catalyst oxidation.

Catalytic Oxidation (collectively referred to as "CO") configuration is provided with catalysts for various types of organic compounds, allowing the organic compounds to oxidize through the catalyst, which is a lot of operation because of the high energy loss. It requires a cost, and there is a disadvantage in that the operation of the device is severely changed due to the reduction in the service life due to the thermal damage of the catalyst and the change of the type of the organic compound.

Regenerative Thermal Oxidation (collectively referred to as "RTO") configuration is provided with pipes, valves and large amounts of heat storage material over a wide range to allow the organic compounds to be burnt and oxidized, which requires a significant amount of heat storage material. In addition, the size of the device itself is increased, and the high energy loss due to the high heat storage temperature and the forced exhaust method due to the heat storage is large.

In addition, the above-described regenerative catalytic oxidation (collectively referred to as Recuperative Catalytic Oxidation " RCO ") configuration that combines catalytic oxidation and regenerative oxidation is to complement the mutual disadvantages of the composition for performing catalytic oxidation and the configuration for performing regenerative oxidation. The merge is configured.

The regenerative catalytic oxidation structure thus constructed has advantages such as reduction of operating cost due to the combination of catalytic oxidation and storage oxidation, response operation to other types of organic compounds, low oxidation temperature, and reduction of energy loss due to exhaust. do.

However, although the above-described regenerative catalytic oxidation composition is combined with each other of catalytic oxidation and regenerative oxidation as above, damage to the catalyst due to combustion and intensive oxidation, and contamination upon inhalation of various kinds of organic compounds are performed. The problem of enlargement of installation space caused by the combination of low removal rate of material, quantum composition according to catalytic oxidation and regenerative oxidation composition still cannot be solved.

The present invention was devised to solve the above problems, and the first object of the present invention is to allow an organic compound to proceed in a selective direction through a branched pipe, and simultaneously perform catalytic oxidation and thermal storage oxidation of the organic compound. It is to provide a volatile organic compound multistage oxidation apparatus having a structure in which a plurality of catalyst units are provided.

In addition, a second object of the present invention is to provide a volatile organic compound multistage oxidizing apparatus having a structure capable of simultaneously performing a regenerative oxidation method and a catalytic oxidation method, and simplifying the configuration of the device itself.

In addition, a third object of the present invention is to provide a heat storage material having a carrier structure, thereby providing a volatile organic compound multistage oxidation apparatus having a structure capable of preventing damage to the catalyst material due to heat storage oxidation.

The object of the present invention, a plurality of pipes are formed on both sides to set the direction in which the organic compound and the organic oxide oxidized organic compound proceeds, the direction control unit for outflowing / entering the organic compound and the organic oxide according to the set direction ;

A catalyst unit which is installed to interfere with each pipe of the direction control unit and accumulates / oxidizes the organic compound proceeding through the direction control unit simultaneously with reduction;

A combustion unit interfering with the pipe and having a combustion chamber for combustion and oxidation of the organic compound to burn / oxidize the organic compound passing through the catalyst unit; And

It is achieved by the volatile organic compound multi-stage oxidizer comprising a; heat exchanger is installed in communication with the combustion unit is driven to lower the combustion chamber temperature when the combustion chamber space is overheated.

The direction control unit may include a first fan for forcibly introducing the organic compound, a second fan for forcing the organic compound to flow out, and an organic compound and organic oxide that are forcibly coupled to the first fan and the second fan forcibly carried out. It consists of a four-way valve that selectively travels to proceed / stop in the desired direction.

In the above, the catalyst portion is composed of a heat storage material having a lattice structure so as to have a multi-layered support, and a catalyst material for catalyzing / oxidizing the organic compound contained in the support.

The combustion unit further includes a heater installed to heat the inside of the lower portion of the combustion chamber to maintain a constant combustion temperature.                         

The combustion unit further includes a temperature sensing mechanism for detecting a temperature inside the combustion chamber heated by the heater.

The heat exchanger further includes a third fan for forcibly blowing the cooled air to lower the temperature inside the combustion chamber sensed by the temperature sensing mechanism.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings, a multi-stage oxidation apparatus according to the present invention will be described in detail.

1 is a conceptual diagram of a multistage oxidizer according to the present invention, and FIG. 2 is a conceptual diagram of oxidizing an organic compound in a direction different from that of FIG.

As shown in FIG. 1 and FIG. 2, the multistage oxidizing apparatus according to the present invention provides a plurality of catalyst portions for simultaneously carrying out catalytic oxidation and regenerative oxidation, and also provides a heat storage material 21 having a carrier 21a structure to provide flame. The present invention relates to a volatile organic compound multistage oxidation apparatus (100) capable of preventing damage to the catalyst material (22) generated by direct contact with the catalyst.

The volatile organic compound multistage oxidizing apparatus 100 of the present invention is largely composed of four parts, which includes a direction control unit for controlling the progress of the organic compound, a catalyst unit for oxidizing the organic compound introduced from the direction control unit, and the catalyst unit. It consists of a combustion section for combusting the organic compound entering from and a heat exchanger (41) communicated to selectively lower the temperature of the combustion chamber (31) of the combustion section.

Such a structure is circulated in a clockwise or counterclockwise direction according to the selective direction control of the direction control unit. The organic compound undergoes a series of catalytic oxidation, combustion / oxidation, catalyst / regenerative oxidation regardless of the circulating direction of the organic compound. It is a structure that can be processed.

That is, the catalyst parts are connected to both sides of the combustion unit for burning the organic compound through pipes, so that the organic compound is processed through a series of catalytic oxidation, combustion / oxidation, and catalyst / regenerative oxidation regardless of the circulation direction of the organic compound.

In this case, the direction control unit is coupled to the first fan 11 and the second fan 12 and the first fan 11 and the second fan 12 to forcibly flow out and inflow of the organic compound, forcing the organic compound And a four-way valve 13 that selectively advances the direction to control the organic oxides.

In addition, the catalyst unit is connected to both pipes of the four-way valve 13, respectively, to function to oxidize / reduce the incoming organic compound, wherein the catalyst unit has a lattice structure to have a multi-layered carrier 21a. The heat storage material 21 and the catalyst material 22 which catalyzes / oxidizes the organic compound which is accommodated in each of the carriers 21a and proceed.

Here, the heat storage material 21 recovers heat from the organic oxide introduced from the combustion chamber 31 to indirectly heat the organic oxide. At this time, the shape of the heat storage material 21 is configured in a lattice structure to have a multi-layer carrier 21a to prevent waste of the heat storage material 21, and from the flame of the combustion chamber 31 due to the support structure 21a. It also serves as a firewall to protect the catalyst material 22.

In addition, the combustion section is formed with a combustion chamber 31 for burning / oxidizing an organic compound, and a heater 31a for raising the temperature of the combustion chamber 31 and heating the organic compound is mounted at the bottom thereof. At this time, the upper part of the combustion unit is equipped with a heat exchanger 41 for preventing the internal temperature of the combustion chamber 31 from lowering due to excessive heating of the combustion chamber 31, and also for sensing the internal temperature of the combustion chamber 31. And a temperature sensing mechanism 32.

Meanwhile, the heat exchanger 41 further includes a third fan 41a for forcibly blowing the cooled air to lower the internal temperature of the combustion chamber 31 sensed by the temperature sensing device 32. do. This is to lower the temperature inside the combustion chamber 31 sensed by the temperature sensing mechanism 32 when the temperature of the combustion chamber 31 is heated due to the high concentration of the volatile organic compound introduced therein.

Hereinafter, the operation of the volatile organic compound multistage oxidizing apparatus according to the present invention will be briefly described.

First, the organic compound introduced through the 4-way valve 13 is sent out to the one side catalyst part along the pipe by the first fan 11.

The organic compound is then primarily catalyzed / oxidized by a plurality of catalyst materials 22 accommodated in the carrier 21a of the heat storage material 21.

The primary catalyst / oxidized organic compound is continuously sent to the combustion chamber 31 along the pipe. At this time, the combustion chamber 31 heats the organic compound and burns / oxidizes the secondary.

Then, the secondary combustion / oxidized organic compound from the combustion chamber 31 is sent to the catalyst part on the other side in a heated state. At this time, the heated high temperature organic compound is continuously formed by the heat storage material 21 of the carrier 21a structure. The heat is taken away.

Then, the heat storage material 21 is heated due to the continuous high temperature of the organic compound, and the heated heat storage material 21 indirectly heats the organic compound passed through for thermal storage oxidation. At the same time, the organic compound is subjected to catalytic oxidation by the catalytic material 22 contained in the carrier 21a and converted into organic oxides in a third order, and is immediately converted into an organic oxide. It is discharged via (13).

When a series of time elapses, in the catalytic oxidation, combustion / oxidation, and catalytic / regenerative oxidation method due to the temperature rise of the heat storage material 21 on both sides by changing the circulation path of the organic compound due to the change of direction of the 4-way valve 13 Oxidation efficiency of organic compounds can be increased by catalyst / regenerative oxidation, combustion / oxidation, and catalyst / regenerative oxidation.

As described above, in the present invention, a plurality of catalyst units are installed on both sides of the combustion chamber to increase the oxidation efficiency of the organic compound, and the heat storage material having a lattice structure such that the catalyst unit has a multi-layered carrier, and each carrier It is composed of a catalyst material for catalytic oxidation of the organic compound advancing in the can be prevented damage to the catalyst material by heat, thereby increasing the service life of the catalyst material.

In addition, the present invention obtains the effect of increasing the removal efficiency of harmful substances by oxidizing and catalytic oxidation and regenerative thermal oxidation of various organic compounds by forming a multilayered catalyst at the same time, the device is simpler configuration It is implemented by the effect that the device can be miniaturized.

Claims (6)

Directional control unit for forming a plurality of pipes on both sides to set the direction in which the organic compound and the organic oxide oxidized organic compound proceeds, and outflow / inflow of the organic compound and the organic oxide according to the set direction; A catalyst unit which is installed to interfere with each pipe of the direction control unit and catalytically oxidizes an organic compound proceeding through the direction control unit; A combustion unit interfering with the pipe and having a combustion chamber 31 for burning / oxidizing the organic compound to burn and oxidize the organic compound passing through the catalyst unit; And And a heat exchanger (41) connected to the combustion section and driven to lower the temperature of the combustion chamber (31) when the space of the combustion chamber (31) is overheated. The method of claim 1, The direction control unit, A first fan 11 for forcibly introducing organic compounds, A second fan 12 for forcibly draining the organic compound, Combining the first fan 11 and the second fan 12, characterized in that it consists of a four-way valve (13) to selectively proceed to proceed / intermittent in the desired direction of the organic compound and organic oxide Volatile organic compound multistage oxidizer. The method of claim 1, The catalyst unit, Volatile organic material comprising a heat storage material 21 having a lattice structure having a multi-layer carrier 21a and a catalyst material 22 which catalyzes the organic compound advancing contained in the carriers 21a. Compound multistage oxidizer. The method of claim 1, The combustion unit, Volatile organic compound multistage oxidizer, characterized in that it further comprises a heater (31a) is installed to heat the inside of the combustion chamber (31) to maintain a constant combustion temperature. The method according to claim 1 or 4, The combustion unit, Volatile organic compound multistage oxidizing apparatus further comprises a temperature sensing mechanism (32) for detecting the temperature inside the combustion chamber (31) heated by the heater (31a). The method of claim 1, The heat exchanger (41) further comprises a third fan (41a) for forcibly blowing the cooled air to lower the internal temperature of the combustion chamber (31) sensed through the temperature sensing mechanism (32) Compound multistage oxidizer.

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