KR20130061280A

KR20130061280A - Ceramic catalyst filter-type particle collecting and exhaust gas clean-up device for the exhaust gas of ship diesel engines

Info

Publication number: KR20130061280A
Application number: KR1020110127502A
Authority: KR
Inventors: 신현경; 김기호
Original assignee: 신현경
Priority date: 2011-12-01
Filing date: 2011-12-01
Publication date: 2013-06-11

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting purifier of a ceramic catalyst filter method for exhaust gas for ship engines. There is a device to input the adsorption material (CaO, Ca (OH) ₂ ) for reducing (SOx) and a reducing agent (Urea or NH3) for reducing the nitrogen oxides (NOx), and a ceramic catalyst disposed inside the reactor An integrated device for simultaneously reducing particulate matter (PM), sulfur oxides (SOx) and nitrogen oxides (NOx) using a filter.

The ceramic catalyst filter has a dual structure in which the pore size is different from the surface and the inside thereof, the inside carries a catalyst for purifying nitrogen oxides (NOx), and the surface has a smaller pore size than the inner layer to operate the diesel engine. Particulate matter (PM) and sulfur oxides (SOx) by reaction are collected and desorbed from the surface. Thus, particulate matter (PM), sulfur oxides (SOx), and nitrogen oxides (NOx) are devices using ceramic catalyst filters. The present invention relates to an integrated dust collecting and purification apparatus using a ceramic catalyst filter for exhaust gas for marine diesel engines.

As a result, since a complicated device and a step required for exhaust gas purification and dust collection of a conventional marine engine can be reduced to a single device, the exhaust gas purification and dust collection system can be easily decorated, and the exhaust gas purification device and the exhaust gas dust removing facility are provided. It has the advantage of reducing the manufacturing cost, improving the space efficiency by making the optimum design, facilitating the operation and use through simple system operation, and reducing the operating and maintenance costs by implementing low pressure loss of the whole system.

Ship, diesel engine, exhaust gas, ceramic catalyst filter, simultaneous reduction device

Description

Ceramic Catalyst Filter-type particle collecting and exhaust gas clean-up device for the exhaust gas of ship diesel engines}

The present invention is an integrated purification system for reducing air pollutants in exhaust gas including particulate matter (PM), sulfur oxides (SOx), nitrogen oxides (NOx), etc. generated at the rear end of marine diesel engine exhaust gas at the same time. The present invention relates to an apparatus, and more particularly, the complicated multi-stage apparatus and process steps required for exhaust gas purification and dust collection of a conventional marine diesel engine can be reduced to a single process, thereby simplifying the exhaust gas purification and dust collection system. It can reduce the manufacturing cost of exhaust gas purification device and exhaust gas dust removal equipment, increase space efficiency by optimal design and manufacture inside the ship, and minimize the separate maintenance, which makes it easy to operate and operate through simple system. Particulate matter (PM) and sulfur from the rear end of marine diesel engines, which can reduce maintenance costs. Cargo (SOx), it relates to a ceramic monolithic catalyst filter dust purification apparatus for reducing air pollutants in the exhaust gas containing nitrogen oxide (NOx), etc. at the same time.

In the case of marine diesel engines, air pollutants such as particulate matter (PM), sulfur oxides (SOx) and nitrogen oxides (NOx) are generated at the same time during operation and combustion. It is currently being developed and applied in multiple stages by coping with various devices such as dust collector, electric dust collector, and SCR device. Ship-related environmental regulations are increasingly being strengthened and increasing internationally.

Accordingly, various methods have been proposed to reduce the emission of air pollutants (PM, SOx, NOx, etc.) in the case of such a marine diesel engine. In this regard, a dry or wet dust removing device is proposed to reduce exhaust gases including particulate matter, sulfur oxides, nitrogen oxides, etc., and the wet dust removing device is described in Korean Patent Application No. 10-2006-61951. As a dry dust removal device, there is a method of applying DPF (Diesel Particulate Filter), and a metal filter can be applied, but they are capable of capturing particulate matter (PM), but have limitations that cannot remove NOx. . In addition, a catalyst-coated honeycomb filter is used in order to remove nitrogen oxides. This is because only NOx removal is possible. After a certain period of time, the surface poisoning phenomenon due to particulate matter (PM), sulfur oxide (SOx) There is a problem that the removal function is shortened and the use period is short.

Accordingly, in the conventional dust collector for simultaneous removal of particulate matter (PM) and exhaust gas pollutants, a ceramic catalyst filter having a honeycomb structure is used. In this case, the particulate matter accumulates in the honeycomb structure, causing a difference in pressure difference. This problem is caused by problems such as heat shock and cracks when the accumulated particulate matter is regenerated in a limited space, and the catalyst is poisoned by the particulate matter so that exhaust gas pollutants such as NOx can no longer be purified. Remain a constant challenge.

In addition, in the case of ships, it is difficult to widen the cross-sectional area of the dust collector due to space limitations, and as shown in FIG. Since there is a problem that the equipment is complicated, the production cost increases, the operating cost is increased.

In addition, in the case of such a dust collector, dust containing smoke, etc. can be removed, but in addition to the exhaust gas, the generation of air pollutants such as nitrogen oxides is a problem, so in addition to the dust collector, a separate SCR (Selective Catalytic Reduction) facility Etc. to reduce the emission of nitrogen oxides or to add a complex device such as to reduce the emission of nitrogen oxides by injecting water to the combustion gas through a separate injection device, the equipment becomes more complicated, the production cost increases There is a problem.

Therefore, there is an urgent need to develop a facility capable of simultaneously performing marine exhaust gas purification and dust collection that can be applied to marine diesel engines that can solve these problems.

In order to solve the problems of the prior art as described above, the present invention can reduce the complicated multi-stage device and process steps required for the exhaust gas purification and dust collection of the conventional marine diesel engine in a single device, the exhaust gas purification and The dust collection system can be easily decorated, thus reducing the production cost of the exhaust gas purification device and the exhaust gas dust removing facility, increasing the space efficiency by optimizing the design from the inside of the ship, and minimizing the maintenance and maintenance. Ceramic catalyst filter for simultaneous reduction of particulate matter (PM), sulfur oxides (SOx), nitrogen oxides (NOx), etc. generated from ship diesel engine exhaust gas that can be easily operated and operated and can reduce maintenance costs. It is an object of the present invention to provide an integrated dust collecting and purification device.

In order to achieve the above object,

The present invention relates to a dust collection and purification device using a ceramic catalyst filter for marine diesel engine exhaust gas. ) There is a device to inject adsorption material (CaO, Ca (OH) ₂ ) for reduction and a device to inject a reducing agent (Urea or NH3) to reduce nitrogen oxides (NOx), and ceramics arranged inside the reactor The present invention relates to a device using a catalytic filter.

The ceramic catalyst filter has a dual structure in which the pore size is different from the surface and the inside thereof, the inside carries a catalyst for purifying nitrogen oxides (NOx), and the surface has a smaller pore size than the inner layer to operate the diesel engine. The particulate matter (PM) generated by the reaction and the sulfur oxide (SOx) by the reaction is collected and desorbed from the surface of the ceramic catalyst filter,

Accordingly, it is possible to simplify the exhaust gas purifying and dust collecting system and reduce the number of complicated devices and steps required for exhaust gas purification and dust collecting of the marine engine of the prior art to a single device. Therefore, the exhaust gas purifying device and the exhaust gas purifying device The manufacturing cost can be reduced, the space efficiency can be improved by optimizing the design, the operation and use can be facilitated through the simple operation of the system, and the operation cost and the maintenance cost can be reduced by implementing the low pressure loss of the entire system. Thus, there is provided a ceramic catalyst filter dust purification apparatus for marine diesel engine exhaust gas, wherein particulate matter (PM), sulfur oxides (SOx), and nitrogen oxides (NOx) are simultaneously reduced in an apparatus using a ceramic catalyst filter.

The present invention relates to an apparatus using a ceramic catalyst filter disposed inside a dust collector or a reactor of a ceramic catalyst filter type of marine diesel engine exhaust gas of the present invention. The response device is directly connected to the exhaust gas outlet line of the diesel engine to utilize the high temperature of the exhaust gas so that it is possible to easily obtain the high temperature reaction conditions for reducing the NOx in the exhaust gas. It provides basic technology to simultaneously reduce materials (PM), sulfur oxides (SOx) and nitrogen oxides (NOx).

As a result, the complicated apparatuses and steps required for exhaust gas purification and dust collection of a conventional marine engine can be reduced to a single device, so that the exhaust gas purification and dust collection system can be easily decorated, and the exhaust gas purification device and the exhaust gas dust elimination system can be simplified. It can reduce the manufacturing cost of equipment, increase space efficiency by making optimal design inside the vessel, facilitate operation and use through simple system operation, and reduce operation and maintenance cost by realizing low pressure loss of the whole system. There is this. As such, particulate matter (PM), sulfur oxides (SOx), and nitrogen oxides (NOx) are simultaneously reduced in a device using a ceramic catalyst filter, and the ceramic catalyst filter of the marine diesel engine exhaust gas which can obtain a simple and efficient effect is collected. It is a purifier.

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

The present invention relates to a dust collecting purifier of a ceramic catalyst filter type of marine engine exhaust gas as shown in FIG. 1, and a duct connected to an exhaust gas outlet line side of a marine diesel engine and exiting the exhaust gas outlet side. ) Is a device to inject adsorption material (CaO, Ca (OH) ₂ ) to reduce sulfur oxides (SOx) and a reducing agent (Urea or NH3) to reduce nitrogen oxides (NOx). A device using a ceramic catalyst filter disposed.

The ceramic catalyst filter has a dual structure in which the pore size is different from the surface and the inside, as shown in FIG. 4, the inside carries a catalyst for purifying nitrogen oxide (NOx), and the surface has a smaller pore size than the inner layer. The particulate matter (PM) generated by the operation of the diesel engine and the sulfur oxide (SOx) by reaction are collected and desorbed from the surface. Thus, particulate matter (PM), sulfur oxides (SOx) and nitrogen oxides (NOx) are ceramics. Simultaneous reduction in the apparatus using the catalyst filter relates to a ceramic catalyst filter integrated dust collector and purification device for marine diesel engine exhaust gas, as shown in FIG.

In other words, in the integrated dust purification apparatus using the ceramic catalyst filter of the present invention, the inlet end thereof is directly connected to the exhaust gas outlet of the marine diesel engine. Through this, it is possible to maintain the high temperature (about 200 to 350 ℃) of the exhaust gas as it is, and use it as it is 200 to 350 ℃ necessary for the NOx reduction process, and particulate matter accumulated on the surface of the ceramic catalyst filter using a dust removal device. (PM), because it can shake off the sulfur oxide (SOx) that reacted and maintain the continuous pressure loss of the ceramic catalyst filter.

To this end, the method of manufacturing a ceramic filter applied to the present invention is preferably applied to a method of manufacturing a ceramic filter, such as Korean Patent Registration No. 690573, developed by the present applicant.

In the case of the present invention, the exhaust gas discharge pressure alone is sufficient to discharge, and the increase in back pressure is significantly reduced, so that a separate pump or fan is unnecessary, and in order to make the discharge more smooth, The initial differential pressure should be designed below 20 mmH ₂ O and the operating differential pressure is preferably 20-150 mmH ₂ O. In addition, in order to obtain such a differential pressure, the ceramic filter is preferably characterized in that the porosity of 30 to 90% and the pore diameter of 1 to 200 ㎛.

Next, a slurry including ceramic powder is applied to the surface of the sintered body (inner layer) in which the sintering is performed, followed by drying or secondary sintering to form a surface coating layer to form a microsurface layer. As the ceramic powder in the slurry used herein, a finer powder may be used so that the pores of the surface layer are smaller in size than the pores of the inner layer, and the slurry thus applied is solidified through drying or sintering. Preferably, the outer layer of the ceramic filter may be made of SiC having good thermal conductivity, and a pore size of 1 to 50 µm after drying or sintering may be suitable for filtering PM.

Through this, particulate matter (PM), sulfur oxides (SOx), and nitrogen oxides (NOx) can be simultaneously reduced, and the composition function of the simultaneous reduction integrated device using the ceramic catalyst filter is shown in FIG. 3, as shown in detail in FIG.

The form of the dust collecting purification apparatus of the marine diesel engine exhaust gas filter of the present invention including the dual-type ceramic catalyst filter as described above may have a configuration similar to that of a conventional dust collecting equipment, and as described above, the Republic of Korea patent registration It may have a configuration of heading 607335, it is possible to apply other forms of application of known dust collecting equipment.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various modifications and changes made by those skilled in the art without departing from the spirit and scope of the present invention described in the claims below. Changes are also included within the scope of the invention.

1 is a view showing an overall schematic diagram of the exhaust gas purification system of a marine diesel engine of the present invention.

(A), (b) and (c) of FIG. 2 illustrate a dust collecting purification system in the case of applying the ceramic catalyst filter to various device arrangements according to an embodiment of the ceramic catalyst filter type dust collecting purification apparatus for ship engine exhaust gas according to the present invention. A schematic diagram of a reactor is shown.

3 is a schematic view showing a method of purifying a ceramic catalyst filter of a marine diesel engine exhaust gas to which the embodiment according to the method and flow of dust collection purification of the ceramic catalyst filter of the present invention is applied.

FIG. 4 is a schematic view showing a method of purifying a ceramic catalyst filter of a marine diesel engine exhaust gas in detail showing an embodiment according to the method and flow of dust collection purification of a ceramic catalyst filter of the present invention.

FIG. 5 is a photo schematically showing ceramic catalyst filters of various types and shapes used in marine diesel engine exhaust gas dust purification purifying of the present invention.

Claims

Ducts are connected to the exit line of the marine diesel engine exhaust gas, and adsorption materials (CaO, Ca (OH) ₂ ) are introduced to reduce sulfur oxides (SOx) between the ducts exiting the exhaust gas outlet. And a reducing device (Urea or NH3) for reducing NOx, and a ceramic catalyst filter is placed inside the reactor.

The ceramic catalyst filter has a dual structure in which the pore size is different from the surface and the inside thereof, the inside carries a catalyst for purifying nitrogen oxides (NOx), and the surface has a smaller pore size than the inner layer to operate the diesel engine. Particulate matter (PM) and sulfur oxides (SOx) by reaction are collected and desorbed from the surface. Thus, particulate matter (PM), sulfur oxides (SOx), and nitrogen oxides (NOx) are devices using ceramic catalyst filters. Integrated dust purification apparatus using a ceramic catalyst filter of marine diesel engine exhaust gas, characterized in that the reduction at the same time.

The method of claim 1,

The ceramic catalyst filter

Supporting a slurry including a ceramic powder and a catalyst powder for purification on a support made of a network or porous structure;

Molding and drying the carrier;

Sintering the dried and dried carrier to form an inner layer; And

Dust collection of the ceramic catalyst filter method of the marine diesel engine exhaust gas characterized in that the coating is formed through the step of forming a surface coating layer by drying or secondary sintering by applying a slurry containing a ceramic powder on the surface of the sintered sintered body Purification simultaneous reduction device.

3. The method of claim 2,

The carrier made of the network or porous structure includes a ceramic filter or a structure of another material, and has various shapes as shown in FIG. 5, and includes various other structural shapes, and the porosity is 30 to 90%. The dust collection purification integrated device of the filter type of marine diesel engine exhaust gas, whose diameter is 1-200 micrometers.

The method according to claim 1 or 2,

The ceramic catalyst filter arranged inside the reactor is various and the apparatus having the size and shape of the reactor in various arrangements not represented in various methods and examples as shown in (a) (b) (c) of FIG. Device that can make

The method according to claim 1 or 2, 3, or 4,

The marine diesel engine exhaust gas integrated simultaneous reduction device described above is not limited by the above-described embodiment and the accompanying drawings, including an industrial boiler, etc., from the spirit and scope of the present invention described in the claims Various modifications and changes made by those skilled in the art without departing from the scope of the present invention are also included.