KR100278478B1 - Harmful gas collection and diffusion prevention device of catalytic combustion deodorization equipment - Google Patents

Abstract

Disclosed is a harmful gas collection and diffusion prevention device of a catalytic combustion deodorization system for increasing the efficiency of collecting harmful gases and odors generated from drying ovens such as color steel sheets and various coating processes and saving energy. The present invention consists of a hood installed at the inlet and outlet of the drying oven, and the injection nozzle is formed integrally with the hood to inject high-temperature and high-speed air to the inlet and outlet of the steel plate coated drying oven. The present invention reduces the operating cost and facility cost of the drying oven by injecting hot air into the inlet and the outlet of the drying oven, and prevents the external diffusion of odor generated during the manufacturing process to increase the reliability of the catalytic combustion deodorization equipment.

Description

Harmful gas collection and diffusion prevention device for catalytic combustion deodorization equipment.

1A and 1B are diagrams showing a harmful gas collecting device in a conventional catalytic combustion deodorization system.

2 is a process chart for showing the catalytic combustion deodorization equipment according to the present invention.

3A and 3B are views showing a harmful gas collecting device in a catalytic combustion deodorization system according to the present invention.

* Description of the symbols for the main parts of the drawings *

10: drying oven 10A: collecting hole

11: drying zone 20: combustion furnace

21: pretreatment 22: catalyst

23: main burner 30: duct

40: first heat exchanger 50: second heat exchanger

60: hot water heater 70, 71, 72: blower motor

80, 81: filter 90: reheat chamber

100: hood 110: injection nozzle

The present invention relates to a catalytic combustion deodorization system, and more particularly, to a harmful gas collection and diffusion prevention device of a catalytic combustion deodorization system for increasing the efficiency of collecting harmful gases and odors generated from color steel sheets and various coating processes and saving energy. It is about.

In general, catalytic combustion deodorization equipment is a method of heating a volatile organic solvent discharged from a plant such as petrochemical, metal coating, printing, pharmaceutical, synthetic resin processing and fertilizer to 300 ~ 340 ℃, and contact with the noble metal catalyst to oxidize. Catalytic combustion deodorization equipment is mainly used for deodorization, and precious metals such as platinum or palladium are used as catalysts.

1A and 1B are diagrams showing a harmful gas collecting device in a conventional catalytic combustion deodorization system.

Conventional catalytic combustion deodorization equipment as shown in Figure 1B is a hood for collecting harmful gases and odors in the inlet (2) and outlet (3) of the closed drying oven (1) performing a color steel sheet and various coating processes ( 4) Install each. As shown in FIG. 1A, the hood 4 has a shape in which the area of the lower portion 4B is wider than that of the upper portion 4A. At a predetermined position of the upper part of the drying oven 1, a discharge port 5 for discharging high temperature harmful gas containing a volatile organic solvent generated in the drying oven 1 is formed. Therefore, in the catalytic combustion deodorization facility, the hot gas is discharged out of the drying oven 1 by the fan motor not shown through the discharge port 5. The high temperature harmful gas discharged through the discharge port (5) is discharged to the outside air through a low temperature catalyst combustion system, and the waste heat in the discharge gas is introduced into the drying oven heating system using a heat exchanger. The hood 4 provided at the inlet 2 and the outlet 3 of the drying oven 1 has an external diffusion of exhaust gas containing noxious gas and odor generated in the drying oven 1 as shown in FIG. 1B. In order to prevent the exhaust gas is sucked by a blower not shown to be discharged to the outside in the drying oven (1) is collected in the hood (4). The exhaust gas collected by the hood 4 flows into the catalytic combustion deodorization facility and heats the harmful exhaust gas to 300 to 340 ° C. as described above, and contacts the metal catalyst for purification.

Conventional catalytic combustion deodorization system as described above is installed by collecting the suction hood at the inlet and outlet of the drying oven by collecting the harmful gas scattered into the interior of the color steel sheet and drying ovens of various coating processes, as well as the external low-temperature air Is also introduced. Therefore, the amount of air flowing into the catalytic combustion deodorization system through the hood is increased and the temperature is lowered, causing an increase in the facility and an increase in the operating cost of the catalytic combustion deodorization system. In addition, the suction hood for trapping the harmful gas at the inlet and outlet of the drying oven is not possible to completely seal the interior of the drying oven. Therefore, the odor spreads to the outside of the drying oven, contaminating the workplace and lowering the reliability of the catalytic combustion deodorization equipment. In addition, the outside air is sucked from the inlet and the outlet of the drying oven, the temperature distribution of the workplace is non-uniform, thereby reducing the thermal efficiency and causing a defect in the product.

The present invention was devised to solve such problems, and an object of the present invention is to inject hot air from a collecting device installed at an inlet and an outlet of a drying oven, and perfectly remove harmful gases diffused to the outside of the drying oven. The present invention provides a device for capturing and diffusing harmful gases in a catalytic combustion deodorization system that collects and prevents pollution and reduces operating energy.

The present invention for achieving the above object

Hood installed at the inlet and outlet of the drying oven to block harmful gases;

It is formed integrally with the hood and consists of an injection nozzle for injecting high temperature and high speed air to the inlet and outlet of the drying oven.

According to a preferred embodiment of the present invention, the injection nozzle is a narrow pipe of the lower part, and is formed to be bent at a predetermined angle toward the inlet and outlet sides of the drying oven.

The present invention minimizes the amount of air flowing into the catalytic combustion deodorization facility by injecting high temperature air from the inlet and the outlet of the drying oven and preventing the harmful gas from spreading from the inside of the drying oven to the outside, and thus the facility cost of the catalytic combustion deodorization facility and The operation cost is reduced, and the inside of the drying oven is sealed to the maximum, thereby preventing the external diffusion of odor generated during the manufacturing process, thereby increasing the reliability of the catalytic combustion deodorization system. In addition, since the air introduced into the maximum closed drying oven is hot air, the thermal efficiency is increased, and the product is reduced in quality by eliminating the risk of cooling air being introduced into the product.

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

2 is a process chart for showing the catalytic combustion deodorization equipment according to the present invention. As shown in Figure 2, the drying oven 10 performing the coating drying process is set a plurality of drying zones 11 varying the working environment according to each temperature distribution. In each drying zone 11 installed in the drying oven 10, it is essential to maintain a constant temperature for each drying zone in order to manufacture a high quality iron plate. The combustion furnace 20 receives the harmful gas generated in the drying oven 10 and heats it. In the combustion furnace 20, the catalytic poison, such as sulcon, is remarkably catalytically activated so that the harmful gas treatment function is sufficiently exhibited. It is equipped with a pretreatment unit 21 for removing foreign matters that are reduced or completely lost, and a catalyst 22 for promoting the oxidation reaction of noxious gases at low temperatures. In addition, one side of the combustion furnace 20 is equipped with a sufficient main burner 23 to increase the temperature of the inlet gas during initial operation to maintain about 330 ° C., which is a temperature required for operation of the catalytic combustion deodorization facility. On the outlet side of the combustion furnace 20, a first heat exchanger for recovering waste heat of the exhaust gas of the combustion furnace to increase the temperature of the gas flowing into the combustion furnace 20, recovering the waste heat and heating the air for drying oven heating ( 40 and the second heat exchanger 50 are sequentially connected. One side of the second heat exchanger (50) is a hot water heater (60) for preheating the supply water of the process boiler already installed by using the residual heat generated in the process of the exhaust gas to be reused as a heat source for the process (60) ) Is connected to the duct 30. The outlet side of the hot water heater 60 is provided with a third blower motor 71 for discharging the exhaust gas completely purified through a chimney or the like not shown to the outside. At the air inlet side of the second heat exchanger 50, a first blower motor 70 is installed to suck outside air filtered by the filter 80 and supply the outside air to the heat exchanger 50 by a blower. The outlet side duct 30 of the first blower motor 70 is branched and one side is introduced into the second heat exchanger 50 and heated, and the other side is supplied to each drying zone 11 of the drying oven 10 at room temperature. do. The heated air and the air at room temperature, which are divided into two and supplied to the drying oven 20, are mixed at an appropriate temperature according to the conditions of the drying zone 11 and supplied to the final drying zone. The outlet side of the second heat exchanger 50 Duct 30 enters reheat chamber 90. The reheating chamber 90 reheats the hot air passing through the second heat exchanger 50 to an appropriate temperature and supplies it to each drying zone 11 in the drying oven 10. On the inlet side and the outlet side of the drying oven 10, the hot air and room temperature air supplied from the first blower motor 70 are adjusted to a temperature suitable for spraying, so as to discharge at high speed to the inlet and outlet in the drying oven 10, A hood 100 having a function of an external air blocking film is installed. A collecting hole 10A for collecting exhaust gas and odor generated during the drying process is drilled on the drying oven 10, and the collecting hole 10A is connected to the second blower motor 72. The second blower motor 72 is a combustion gas 20 after the harmful gas discharged from the drying oven 10 and the exhaust gas containing the odor is passed through the filter 81 and heated in the first heat exchanger (40). It is supposed to flow in.

3A and 3B are views showing a harmful gas collecting device in a catalytic combustion deodorization system according to the present invention.

Here, the hoods 100 installed at the inlet and the outlet of the drying oven 10, respectively, inflow of hot air from the second heat exchanger 50 and the reheat burner 90, as shown in FIG. 3B. It receives a high temperature air to the inlet and outlet of the drying oven 10, and has a narrow width at the bottom in order to increase the air blocking effect, both ends bent at a predetermined angle to the inlet and outlet side of the drying oven 10 The nozzle 110 is installed. As the injection nozzle 110 is operated, the hood 100 collides with the products continuously produced as shown in FIG. 3A to prevent the flow of air or gas, and the residual clean air to the inlet and the outlet of the drying oven 10. To discharge.

The detailed operations and effects of the present invention configured as described above will be described with reference to FIGS. 2 and 3A and 3B.

In the catalytic combustion deodorization system according to the present invention, the first blower motor 70 first sucks outside air filtered through a filter and is heated and supplied while passing through the second heat exchanger 50. One end of the outlet side of the first blower motor 70 is heated inlet to the second heat exchanger 50, and the other side is bypassed at room temperature to be used for inlet air temperature control at the inlet of the drying zone. The heated outside air passing through the second heat exchanger 50 flows into the reheating chamber 90 and is reheated to a predetermined temperature to be supplied to each drying zone 11 in the drying oven 10. At this time, the injection nozzle 110 in the hood 100 installed at the inlet and outlet of the drying oven 10 is optimally mixed with high-temperature air from room temperature air from the first blower motor 70 and the reheat burner 90. It is brought under the temperature condition of. The temperature of the air that the injection nozzle 110 is introduced is adjustable in the range of 100 ℃ ~ 300 ℃ which is the temperature set in each drying zone 11 of the drying oven (10). The injection nozzle 110 in the hood 100 discharges hot air introduced by a so-called venturi tube at a high speed to an inlet and an outlet in the drying oven 10. Therefore, at the inlet and the outlet of the drying oven, as shown in FIG. 3B, an air film is formed to block external air, thereby completely sealing the interior of the drying oven 10. The noxious gas generated in the drying oven 10 performing the steel plate coating process completely sealed by the spray nozzle 110 installed in the hood 100 is collected in the collecting hole 10A installed on the top of the drying oven 10. By the second blower motor 72 is discharged. Exhaust gas containing noxious gas and odor emitted from the drying oven 10 discharged to the second blowing motor 72 passes through the filter 81 and is heated to pass through the first heat exchanger 40 to the combustion furnace. Flows into (20). Exhaust gas introduced into the combustion furnace 20 through the first heat exchanger 40 by the second blower motor 72 is connected to the pretreatment unit 21 and the catalyst 22 mounted in the combustion furnace 20. It is purified while passing. At this time, the main burner 23 mounted on the combustion furnace 20 raises the temperature of the combustion furnace 20 to an appropriate temperature in order to promote the catalytic oxidation reaction of the exhaust gas containing the harmful substances and odors introduced therein. Maintain a temperature of about 330 ° C, which is necessary for the operation of the combustion deodorization system. The exhaust gas discharged from the outlet side of the combustion furnace 20 flows into the first heat exchanger 40 and the second heat exchanger 50 through the duct 30. The hot water heater 60 connected to the outlet of the second heat exchanger 50 preheats the feed water of the process boiler by using the residual heat of the remaining exhaust gas recovered from the first and second heat exchangers 40 and 50. It can be reused as a heat source such as hot water for process. The exhaust gas that has passed through the hot water heater 60 is discharged to the outside through a pit not shown by the third blowing motor 71. In other words, the steelmaking and steelmaking ovens are completely sealed by the hot gas injected from the injection nozzle 110 included in the hood 100, and the exhaust gas generated during the steel plate coating drying process is collected on the top of the drying oven. It flows into the catalytic combustion deodorization facility through the ball 10A and is purified.

The present invention is to collect the harmful gas inside the sealed drying oven to reduce the operating cost of the catalytic combustion deodorization equipment, to prevent the external diffusion of odor generated during the manufacturing process, and to increase the reliability of the catalytic combustion deodorization equipment. In addition, the thermal efficiency is increased, thereby excluding the risk of introducing external air into the product, thereby reducing the defect of the product.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited thereto, and improvements or modifications thereof can be made without departing from the ordinary knowledge of those skilled in the art.

Claims (2)

A hood 100 installed at an inlet and an outlet of the drying oven 10 to block harmful gas; Hazardous gas capture and diffusion prevention device of the catalytic combustion deodorization system is formed integrally with the hood (100) is composed of a spray nozzle (110) for injecting a high temperature and high speed air to the inlet and outlet of the drying oven (10). The apparatus of claim 1, wherein the injection nozzle (110) is a pipe having a narrow diameter at a lower portion thereof.