KR100941399B1 - Apparatus and method for processing exhaust gas - Google Patents

Abstract

PURPOSE: An apparatus for processing combustible waste gas using a multistage filter bag circulating an absorption-adsorbing agent and a method thereof are provided to reduce manufacturing costs of the apparatus by installing the apparatus in a narrow space with simple facilities. CONSTITUTION: An apparatus(100) for processing combustible waste gas using a multistage filter bag circulating an absorption-adsorbing agent includes a first chamber(110), a duct reactor(120), a second chamber(130), a blower(140), a circulation ratio adjusting device(150), and a reproducer(160). Each valve is installed on a dust outlet and an absorption-adsorbing agent outlet. The circulation ratio adjusting device includes a blower for first regeneration, a second circulation pipe(153), a third circulation pipe(155), and the blower for second regeneration.

Description

Apparatus and method for treating flue gas using circulating multistage filter bag of absorbent and adsorption {APPARATUS AND METHOD FOR PROCESSING EXHAUST GAS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for treating combustion exhaust gas using an absorbent / adsorbent circulating multistage filter bag. Specifically, the present invention uses a first filter bag, a duct reactor, and a second filter bag, and absorbs exhausted from the secondary chamber. Absorbent sorbent circulating multistage filter bag to discharge some of the adsorbent into the primary chamber and to transfer the remainder to the inlet of the duct reactor to circulate to remove dust, sulfur oxides, nitrogen oxides and mercury contained in the combustion exhaust gas. The present invention relates to an apparatus and a method for treating combustion exhaust gas.

Flue gases in combustion facilities such as incinerators and boilers include nitrogen oxides (NO _X , ie NO, NO ₂ , N ₂ O, N ₂ O ₅ , mainly NO), sulfur oxides (SO _X ), dust, dioxins, mercury, Hazardous pollutants, such as VOCs (Volatile Organic Compounds), are included, which must be treated at or below regulated concentrations before being released into the atmosphere.

In order to remove the dust, a conventional bag filter or a dust collector using a ceramic filter is applied. As a general removal technology of harmful gases, a specific removal technology for each harmful gas is applied. Generally, selective catalytic reduction (SCR) or selective non-catalytic reduction (SNCR) is the most representative. For SCR, noble metals such as platinum, palladium and rhodium or vanadium, iron, cobalt, copper, etc. A catalyst prepared by reacting other transition metal materials with titanium dioxide, vanadium oxide, alumina, zeolite, or the like is bonded to a carrier such as a durable honeycomb cordierite, and loaded in multiple stages in the reaction column, or the catalyst is It is made into particles and filled into the reaction column, and then sprayed on a catalyst heated at high temperature using ammonia or ammonia water as a reducing agent. By selectively reducing nitrogen oxides as the sole is to change to nitrogen gas. On the other hand, the selective non-catalytic reduction method (SNCR) is to inject ammonia, ammonia or urea solution directly into the combustion site to reduce nitrogen oxides, and it is difficult to completely mix with a high temperature exhaust gas by injecting ammonia, It is difficult to control properly.

In addition, in order to remove sulfur oxides, there is a method of adsorbing sulfur oxides and purifying them back to sulfuric acid, but such a process requires a large-scale facility, and thus it is difficult to apply to a small dust collector, and in most cases, hydrated lime or quicklime powder or Although a slurry containing a main component is sprayed onto the exhaust gas, the reaction efficiency of the powder or slurry decreases, and a large amount of secondary pollutants are generated, and the operation cost of the purification equipment increases according to the use of a large amount of the reactant. There is a problem.

In the case of mercury removal technology, additional facilities are used.

However, a technique for simultaneously removing each of the above hazardous substances without separate treatment has been developed, but the development of a form that can be put into practical use has not been achieved until now, and thus, the dust is applied by applying the techniques sequentially. Toxic substances are sequentially removed, but in this case, there is a problem that the dust collecting and purification equipment is complicated and enlarged.

The present invention is to solve the above problems, according to the present invention as described above, using the first filter bag, the duct reactor and the second filter bag, and the part of the absorber adsorbent exhausted from the secondary chamber of the primary chamber By discharging to the inlet, and transporting the rest to the inlet of the duct reactor to circulate to remove dust, sulfur oxides, nitrogen oxides, mercury contained in the combustion exhaust gas, it is possible to reduce the cost of recycling, simple equipment, It is an object of the present invention to provide an apparatus and a method for treating combustion exhaust gas using an absorbent / adsorbent circulation type multistage filter bag, which allows the installation space to be formed relatively smaller than existing equipment.

Features of the present invention for achieving the above object,

An apparatus for removing various harmful pollutants contained in combustion exhaust gas of a combustion facility, comprising: a primary chamber having a plurality of first filter bags disposed therein to remove and discharge dust contained in combustion exhaust gas; Sulfuric acid contained in the combustion exhaust gas through the desulfurization / dehydration absorbent and the denitrification reducing agent supplied from the outside is supplied with combustion exhaust gas from which dust is removed from the primary chamber through the primary chamber and the first duct. A duct reactor for removing cargo, mercury and nitrogen oxides; Is connected through the duct reactor and the second duct is supplied with a combustion exhaust gas from which sulfur oxides and mercury is removed from the duct reactor, the pellet type catalyst is filled therein to remove and discharge the nitrogen oxide contained in the combustion exhaust gas A secondary chamber having a second filter bag; And a blower connected to the secondary chamber and the third duct to forcibly discharge combustion exhaust gas.

Here, the apparatus for treating combustion exhaust gas using the absorbent / adsorbent circulating multistage filter bag includes the desulfurization / dehydrating mercury absorbent adsorbent discharged from the duct reactor and supplied to the secondary chamber and discharged through the first circulation pipe. A circulation ratio adjusting device for supplying the first duct which is a front end of the duct reactor connected to the second circulation pipe and the primary chamber connected to the third circulation pipe at a predetermined ratio; It is further provided with a regeneration device installed on the second circulation pipe to discharge the desulfurization / dehydration absorbent, adsorbent discharged through the circulation ratio control device to the first duct that is the front end of the duct reactor.

Here, the circulating ratio control device recycles 50 to 99% by volume of the desulfurization / dehydration absorbent and adsorbent to the first duct that is the front end of the duct reactor through the second circulation pipe, and absorbs the desulfurization / dehydration mercury. 1 to 50% by volume of the adsorbent is recycled to the primary chamber through the third circulation pipe and discharged to the outside.

Here, the primary chamber is formed in the shape of a square cylinder with an upper surface closed and an open bottom, and is installed in a transverse direction at an upper end thereof, and the lower end is first-sided by a first plate installed with the first filter bag. A first body having a first space part and an upper end separated into a first 1-2 space part; A first hopper extending from the lower end of the first body; A first inlet formed on one side of the first-first space of the first body so that combustion exhaust gas and desulfurization / dehydration are introduced into the absorbent and adsorbent; It is formed on one side of the first 1-2 space portion of the first body to supply the combustion exhaust gas of the first 1-2 space portion of the first body through the first duct is connected to the first duct A first outlet; And a dust outlet formed at an end of the first hopper to discharge dust falling from the first-first space.

Here, one or more primary chambers are connected in parallel.

Here, the duct reactor is installed in the form of a rectangular cylinder having an open upper and lower surface, the upper end is connected to the first duct, the lower end is connected to the second duct; A plurality of first inclined plates installed at an upper end of the duct main body to increase the contact time and the residence time of the combustion exhaust gas and the desulfurization / dehydration which flows into the duct main body, and are inclined in one direction; A plurality of second inclined plates spaced apart from a lower end of the first inclined plate to have a slope opposite to the first inclined plate; And a plurality of N-th inclined plates spaced apart from the lower end of the second inclined plate to have an inclination opposite to the second inclined plate.

Here, the duct reactor is formed in a rectangular tube shape of the upper and lower sides is installed vertically, the upper end is connected to the first duct, the lower end is connected to the second duct; Combustion exhaust gas and desulfurization / dehydration introduced into the duct main body are installed on the upper end of the duct main body to increase the contact time and the residence time of the absorbent and adsorbent, and have a first inclined plate installed at a predetermined angle, and the first A first inclined grating plate having an inclined plate and a second inclined plate having an inclination of a predetermined angle; A third inclination plate installed to be spaced apart from a lower end of the first inclination grating plate, the inclination opposite to the first inclination plate, and a fourth inclination plate installed to intersect with the third inclination plate having an inclination of an angle. A second inclined grating plate provided; A fifth inclination plate installed to be spaced apart from a lower end of the second inclination grating plate, the inclination opposite to the third inclination plate, and a sixth inclination plate installed to intersect the fifth inclination plate and have an inclination of an angle. It consists of an N-th grade grating board provided.

Here, the secondary chamber is formed in the shape of a rectangular cylinder with an upper surface closed and a lower end thereof, and is installed in a transverse direction at an upper end thereof, and a lower end thereof is formed by a second plate installed with the second filter bag. A second main body having a first space and an upper end separated into a second second space; A second hopper extending from the lower end of the second body; A second inlet formed at one side of the second-first space of the second main body so that combustion exhaust gas discharged through the second duct from the duct reactor flows in and connected to the second duct; A second is formed on one side of the second-second space portion of the second body so as to discharge the combustion exhaust gas of the second-second space portion of the second body to the outside through the third duct and connected to the third duct. outlet; And a desulfurization / dehydration mercury absorber / adsorbent outlet formed at the end of the second hopper to discharge the desulfurization / dehydration mercury absorber / adsorbent dropped from the 2-1 space part to the first circulation pipe.

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Another feature of the invention,

A method for removing various harmful pollutants contained in combustion exhaust gas of a combustion facility, comprising: a dust removal process of removing dust contained in combustion exhaust gas in a primary chamber equipped with a filter bag; While the dust-free combustion exhaust gas is passed through the duct reactor, the desulfurization / dehydration absorbent, adsorbent and denitrification agent are introduced into the duct reactor, and the contact time and residence of the combustion exhaust gas of the desulfurization / dehydration absorbent, adsorbent and denitrification reducing agent are introduced. Desulfurization / dehydration / primary denitrification processes to increase the time to remove sulfur oxides, mercury and nitrogen oxides in combustion exhaust gas; And a secondary denitrification removing process of removing the nitrogen oxides in the combustion exhaust gas by introducing the combustion exhaust gas in which desulfurization / dehydration is made of primary denitrification into the secondary chamber and passing through the second filter bag.

Here, the method for treating combustion exhaust gas using the absorbent / adsorbent circulating multistage filter bag regenerates the desulfurization / dehydration mercury absorbent and adsorbent discharged from the desulfurization / dehydration / primary denitrification process to the duct reactor through a circulation pipe. The re-feeding process of re-feeding is further included.

Here, each step of the method for treating combustion exhaust gas using the absorption / adsorbent circulation type multistage filter bag is operated in a temperature range of 150 to 350 ° C.

According to the apparatus and method for treating combustion exhaust gas using the absorbent / adsorbent circulating multistage filter bag of the present invention configured as described above, a part of the absorbent / adsorbent dedusted from the secondary bag using the filter bag, the duct reactor and the second filter bag is used. Is discharged to the inlet of the primary chamber, and the rest is transferred to the inlet of the duct reactor and circulated to remove dust, sulfur oxides, nitrogen oxides and mercury contained in the combustion exhaust gas in a dry manner, thereby operating the recycled adsorbent. Cost reduction is possible, and the facility is simple, there is an advantage that the installation space can be formed relatively smaller than the existing equipment.

Hereinafter, the configuration of the apparatus for treating combustion exhaust gas using the absorbent / adsorbent circulation type multistage filter bag according to the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

1 is a view showing the configuration of an apparatus for treating combustion exhaust gas using an absorbent / adsorbent circulating multistage filter bag according to the present invention, and FIG. 2 shows an absorbent / adsorbent circulating multistage filter bag according to an embodiment of the present invention. 3 is a side cross-sectional view of FIG. 2, and FIG. 4 is a combustion exhaust gas using an absorbent / adsorbent circulating multistage filter bag according to another embodiment of the present invention. It is a perspective view which shows the structure of the duct reactor among the gas treating apparatuses, and FIG. 5 is a side cross-sectional view of FIG.

1 to 5, the apparatus for treating combustion exhaust gas using the absorbent / adsorbent circulation type multistage filter bag according to the present invention includes a primary chamber 110, a duct reactor 120, and two. The vehicle chamber 130, the blower 140, the circulation ratio adjusting device 150, and the regeneration device 160 are configured.

First, the primary chamber 110 is formed in the shape of a rectangular cylinder having an upper surface closed and a lower end open to remove dust contained in the combustion exhaust gas, and is installed in the transverse direction at the upper end thereof, the first filter bag The first main body 115 having the lower end separated into the first-first space portion 113 and the upper-first second space portion 114 by the first plate 112 provided with 111 and the first body. The first hopper 116 extending from the lower end of the first-first space 113 of the 115 and the first body 115 so that the combustion exhaust gas and the regenerated desulfurization / dehydration absorbent and adsorbent are introduced. The first inlet 117 formed on one side of the -1 space portion 113 and the combustion exhaust gas of the first 1-2 space portion 114 of the first body 115 through the first duct 101. A first outlet 118 formed at one side of the first 1-2 space portion 114 of the first body 115 to be supplied to the duct reactor 120 to be described below and connected to the first duct 101; Is formed at the end of the first hopper 116 Article made of a dust discharge port 119 for discharging the dust to be fall in the 1-1 space portion 113. The

Here, a plurality of primary chambers 110 may be connected in parallel, and the first filter bag 111 is a conventional nonwoven type filter.

Here, the dust discharge port 119 is preferably provided with a valve (119-1).

In addition, the duct reactor 120 receives the combustion exhaust gas from which dust is removed from the primary chamber 110, and sulfur oxides contained in the combustion exhaust gas through the desulfurization / dehydration absorbent and adsorbent and the denitrification reducing agent supplied from the outside. The primary chamber 110 and the first duct 101 are connected to remove mercury and nitrogen oxides.

Here, the duct reactor 120 is installed and formed in the shape of a rectangular cylinder with an open upper and lower surfaces as shown in Figures 2 and 3, the upper end is connected to the first duct 101, the lower end of the second duct ( The duct main body 121 connected to the 103 and the combustion exhaust gas and desulfurization / dehydration introduced into the duct main body 121 are installed at the upper end of the duct main body 121 to increase the contact time and the residence time of the absorbent and adsorbent. , The plurality of first inclined plate 123 is installed with an inclination in one direction, and the plurality of second inclined plate 125 having an inclination opposite to the first inclined plate 123 is spaced apart from the lower end of the first inclined plate 123. ) And a plurality of N-th inclined plates 127 spaced apart from the lower end of the second inclined plate 125 to have an inclination opposite to the second inclined plate 125. At this time, the duct reactor 120 may be added or subtracted according to the selection, the angle Θ1 of the first inclined plate 123 has a range of 10 ~ 80 °, the angle of the second inclined plate 125 ( Θ2 has a range of 10 ° to 80 °, and then the angles of the inclined plates are equal to the angles of the first inclined plate 123 and the second inclined plate 125.

Here, the duct reactor 120 is formed in a rectangular tube shape having an upper and lower sides open as shown in FIGS. 4 and 5, the upper end of which is connected to the first duct 101, and the lower end of the second duct. The duct main body 121-1 connected to the duct main body 121-1 and the combustion exhaust gas flowing into the duct main body 121-1 and the desulfurization / dehydration adsorbent adsorbent and the residence time are increased. The first inclined plate 123-11 installed at an upper end of 1) and having a predetermined angle inclination, and the second inclined plate 123-13 having a predetermined angle inclined with the first inclined plate 123-11. The first inclined grating plate 123-1 and the first inclined grating plate 123-1 is provided spaced apart from the lower end, the third inclined plate having an inclination opposite to the first inclined plate 123-11 (125-11) and the fourth inclined plate (125-13) having a predetermined angle of inclination and installed to intersect with the third inclined plate (125-11). The fifth inclination plate 125-1 and the fifth inclination plate 127-11 which are installed to be spaced apart from the lower end of the second inclination grating plate 125-1 and have an inclination opposite to the third inclination plate 125-11. ) And an N-th inclined grating plate 127-1 having a sixth inclination plate 127-13 installed to intersect with the fifth inclination plate 127-11 and having a predetermined angle. In this case, the number of inclined plates of the duct reactor 120 may be added or subtracted according to a selection, and the angle θ1 of the first inclined plate 123-11 has a range of 10 to 80 °, and the second inclined plate 125-11. ) Angle Θ2 has a range of 10 to 80 °, and then the angles of the inclined plates are equal to the angles of the first inclined plate 123-11 and the second inclined plate 125-11.

Here, the desulfurization / dehydration mercury absorbent and adsorbent refer to a conventional high functional sulfur oxide absorbent and a mercury adsorbent, and the denitrification reducing agent refers to ammonia gas and the like, which is a normal denitrification agent.

In addition, the secondary chamber 130 is formed in the shape of a rectangular cylinder having an upper surface closed and the bottom open to remove the nitrogen oxide contained in the combustion exhaust gas, and is installed in the transverse direction at the upper end thereof, the second filter The second main body 135 having the lower end separated into the 2-1 space part 133 and the upper end into the 2-2 space part 134 by the second partition plate 132 provided with the bag 131, and the second The second hopper 136 extending from the bottom of the second-first space 133 of the main body 135 and the combustion exhaust gas discharged through the second duct 103 from the duct reactor 120 are introduced. The second inlet 137 formed on one side of the second-first space 133 of the second body 135 and connected to the second duct 103, and the second-second space of the second body 135 The third duct 105 is formed on one side of the second-second space part 134 of the second body 135 to discharge the combustion exhaust gas of the part 134 to the outside through the third duct 105. The second outlet 138 and the second hopper 136 connected Is formed at an end comprises a second-first space section 133 desulfurization / talsueun absorbent, the adsorbent discharge port 139 for discharging a first circulation pipe 107 to be described in the desulfurization / talsueun absorbent, adsorbent and falling in.

Here, a plurality of secondary chambers 130 may be connected in parallel, and the second filter bag 131 is formed in a cartridge type so as to fill a pellet-type catalyst therein in a conventional nonwoven fabric and increase the filtration area. It is preferable.

Here, it is preferable that the valve 139-1 is provided in the desulfurization / dehydration absorbent / adsorbent discharge port 139.

In addition, the blower 140 is connected by the second discharge port 138 and the third duct 105 of the secondary chamber 130 to forcibly discharge the combustion exhaust gas.

In addition, the circulation ratio adjusting device 150 collects the desulfurization / dehydration absorbent and the adsorbent discharged through the desulfurization / dehydration absorbent and the adsorbent outlet 139 from the lower portion of the second filter bag 130 to the first circulation pipe 107. Received through the second circulation pipe 153 is supplied to the first duct 101, and through the third circulation pipe 155 to the primary chamber 110, respectively.

Here, the circulation ratio adjusting device 150 is a first duct (end) of the front end of the duct reactor 120 through the second circulation pipe 153 through a plurality (for example, 95% by volume) of the desulfurization / dehydration absorbent, adsorbent ( 101) and a portion (for example, 5% by volume) is recycled to the primary chamber 101 through the third circulation pipe 155 and discharged to the outside.

Here, the circulation ratio adjusting device 150 may further include a first regeneration blower 151 for delivering a desulfurization / dehydration absorbent and an adsorbent to the end of the first circulation pipe 107 and a desulfurization to the third circulation pipe 155. The second regenerative blower 157 which delivers the dehydration absorber and the adsorbent is provided.

Meanwhile, the regeneration device 160 is installed on the second circulation pipe 153 to regenerate and discharge the desulfurization / dehydration absorbent and adsorbent supplied from the circulation ratio control device 150, which is the front end of the duct reactor 120. The first duct 101 is recycled.

Meanwhile, the first duct 101 is provided with a desulfurization / dehydration absorbent / adsorbent inlet 101-1 through which desulfurization / dehydration absorbent and adsorbent are introduced, and a denitrification reducing agent inlet 101-3 through which denitrification reducing agent is introduced.

That is, the apparatus 100 for treating combustion exhaust gas using the absorbent / adsorbent circulation type multistage filter bag according to the present invention operates the blower 140 to allow the combustion exhaust gas to flow into the primary chamber 110, and then burns the combustion apparatus. The dust contained in the exhaust gas is removed by using the first filter bag 111 of the primary chamber 110, and combustion is exhausted using a desulfurization / dehydration absorbent, an adsorbent, and a denitrification reducing agent in a continuously installed duct reactor 120. Sulfur oxides, mercury, and nitrogen oxides of the gas are firstly removed, and secondly, nitrogen oxides are secondarily removed using the second filter bag 131 of the secondary chamber 130 and then discharged to the atmosphere through the blower 140. .

At this time, the dust stored in the primary chamber 110 is discharged to the outside through the dust outlet 119 formed at the end of the first hopper 116, is discharged from the duct reactor 120 is supplied to the secondary chamber 130 The desulfurization / dehydration of the absorbed and desorbed silver is separated by a certain ratio from the circulation ratio control device 150 and then regenerated through the regeneration device 160, and then circulated to the duct reactor 120 through the second circulation pipe 153. It is supplied to the primary chamber 110 through the third circulation pipe 155 and discharged to the outside.

Hereinafter, a method for treating combustion exhaust gas using an absorbent / adsorbent circulating multistage filter bag according to the present invention will be described in detail with reference to the accompanying drawings.

6 is a process chart for explaining a method for treating combustion exhaust gas using an absorbent / adsorbent circulation type multistage filter bag according to the present invention.

The present invention is a dust removal process (S100) for removing the dust contained in the combustion exhaust gas in the primary chamber 110 provided with the first filter bag 111, and the combustion exhaust gas from which the dust is removed duct reactor 120 ) And at the same time, desulfurization / dehydration absorbent and adsorbent and denitrification reducing agent are introduced into the duct reactor 120 to increase the contact time and residence time of the desulfurization / dehydration absorbent and adsorbent and the denitrification reducing agent in the combustion exhaust gas. A desulfurization / dehydration / first denitrification step (S110) for removing sulfur oxides, mercury, and nitrogen oxides, and a combustion filter gas in which desulfurization / dehydration / first denitrification is performed is introduced into the secondary chamber 130 to provide a second filter bag ( Passing 131, a second denitrification removing process (S120) of removing nitrogen oxides in the combustion exhaust gas again. Here, the treatment method of the combustion exhaust gas using the absorbent / adsorbent circulation type multistage filter bag is discharged in the desulfurization / dehydration / primary denitrification process, that is, the desulfurization / dehydration mercury absorption / adsorbent outlet 139 of the secondary chamber 130. After the desulfurization / dehydration of the discharged desorbed silver adsorbent at a predetermined ratio in the circulation ratio control device 150 (S130), after regeneration through the regeneration device 160 (S140), the desulfurization / dehydration process is re-introduced. Optionally further includes a re-feeding process. Here, it is preferable that each process is operated in the temperature range of 150-350 degreeC.

That is, in the method for treating combustion exhaust gas using the absorbent / adsorbent circulation type multistage filter bag according to the present invention, the dust contained in the combustion exhaust gas is removed using the first filter bag 111 of the primary chamber 110. Then, the duct reactor 120 is supplied to the desulfurization / dehydration absorber and the denitrification agent in the duct reactor 120 to contact the combustion exhaust gas to remove sulfur oxides, mercury, and nitrogen oxides.

Then, first, the dust is removed, and the combustion exhaust gas from which sulfur oxides, mercury, and nitrogen oxides are removed secondly is introduced into the secondary chamber 130, and once again, nitrogen oxides are removed using the second filter bag 131. The removal eventually results in the release of clean combustion exhaust gas free of dust, sulfur oxides, mercury and nitrogen oxides.

As those skilled in the art would realize, the described embodiments may be modified in various ways, all without departing from the spirit or scope of the present invention. It is to be understood, however, that the present invention is not limited to the specific forms referred to in the description, but rather includes all modifications, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. Should be.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the configuration of an apparatus for treating combustion exhaust gas using an absorbent / adsorbent circulation type multistage filter bag according to the present invention.

2 is a perspective view showing the configuration of a duct reactor in the apparatus for treating combustion exhaust gas using an absorbent / adsorbent circulating multistage filter bag according to an embodiment of the present invention;

3 is a side cross-sectional view of FIG.

4 is a perspective view showing the configuration of a duct reactor in the apparatus for treating combustion exhaust gas using an absorbent / adsorbent circulating multistage filter bag according to another embodiment of the present invention;

5 is a side cross-sectional view of FIG. 4;

6 is a process chart for explaining a method for treating combustion exhaust gas using an absorbent / adsorbent circulation type multistage filter bag according to the present invention.

<Explanation of symbols on main parts of the drawings>

110: primary chamber 111: first filter bag

120: duct reactor 130: secondary chamber

131: second filter bag 140: blower

150: circulation ratio control device 160: playback device

Claims (13)

Apparatus for removing various harmful pollutants contained in the combustion exhaust gas of the combustion facility, A primary chamber provided with a plurality of first filter bags therein to remove and discharge dust contained in combustion exhaust gas; Sulfuric acid contained in the combustion exhaust gas through the desulfurization / dehydration absorbent and the denitrification reducing agent supplied from the outside is supplied with combustion exhaust gas from which dust is removed from the primary chamber through the primary chamber and the first duct. A duct reactor for removing cargo, mercury and nitrogen oxides; Is connected through the duct reactor and the second duct is supplied with a combustion exhaust gas from which sulfur oxides and mercury is removed from the duct reactor, the pellet type catalyst is filled therein to remove and discharge the nitrogen oxide contained in the combustion exhaust gas A secondary chamber provided with a second filter bag; A blower connected to the second chamber and a third duct forcibly discharging combustion exhaust gas; And A first duct which is a front end of the duct reactor connected to a second circulation pipe and the desulfurization / dehydration absorbent and adsorbent discharged from the duct reactor and supplied to the secondary chamber and discharged through the first circulation pipe, and a third circulation pipe A circulation ratio adjusting device for supplying the primary chamber connected to the primary chamber at a predetermined ratio; And And a regeneration device installed on the second circulation pipe to regenerate the desulfurization / dehydration absorbent and adsorbent discharged through the circulation ratio control device and supplying the desulfurization / dehydration adsorbent to the first duct that is the front end of the duct reactor. · Combustion exhaust gas treatment device using adsorbent circulation multistage filter bag. delete The method of claim 1, The circulation ratio adjusting device, Recirculate 50 to 99% by volume of the desulfurization / dehydration absorbent and adsorbent to the first duct, which is the front end of the duct reactor, through the second circulation pipe and 1 to 50% by volume of the desulfurization / dehydration and adsorbent to the first duct reactor. Apparatus for treatment of combustion exhaust gas using an absorbent and adsorbent circulation type multistage filter bag, which is recycled to the primary chamber through a third circulation tube and discharged to the outside. The method of claim 1, The primary chamber, The upper surface is closed and is formed in the shape of a rectangular cylinder having an open bottom, and is installed in the transverse direction at the upper end thereof, the lower end being the first space by the first plate installed with the first filter bag, the first is the first space part, the first is the first- A first body separated into two space parts; A first hopper extending from the lower end of the first body; A first inlet formed on one side of the first-first space of the first body so that combustion exhaust gas and desulfurization / dehydration are introduced into the absorbent and adsorbent; It is formed on one side of the first 1-2 space portion of the first body to supply the combustion exhaust gas of the first 1-2 space portion of the first body through the first duct is connected to the first duct A first outlet; And An apparatus for treating combustion exhaust gas using an absorbent / adsorbent circulation type multistage filter bag, which is formed at an end of the first hopper and comprises a dust outlet for discharging dust falling from the first-first space. The method of claim 4, wherein The primary chamber, An apparatus for treating combustion exhaust gas using an absorbent / adsorbent circulation type multistage filter bag, wherein one or more are connected in parallel. The method of claim 1, The duct reactor, A duct body having an upper and lower sides formed in an open rectangular shape and installed vertically, the upper end of which is connected to the first duct, and the lower end of which is connected to the second duct; A plurality of first inclined plates installed at an upper end of the duct main body to increase the contact time and the residence time of the combustion exhaust gas and the desulfurization / dehydration which flows into the duct main body, and are inclined in one direction; A plurality of second inclined plates spaced apart from a lower end of the first inclined plate to have a slope opposite to the first inclined plate; And Apparatus for treating combustion exhaust gas using an absorbent / adsorbent circulating multistage filter bag, comprising a plurality of N-th inclined plates spaced from a lower end of the second inclined plate and having an inclination opposite to the second inclined plate. The method of claim 1, The duct reactor, A duct body having an upper and lower sides formed in an open rectangular shape and installed vertically, the upper end of which is connected to the first duct, and the lower end of which is connected to the second duct; Combustion exhaust gas and desulfurization / dehydration introduced into the duct main body are installed on the upper end of the duct main body to increase the contact time and the residence time of the absorbent and adsorbent, and have a first inclined plate installed at a predetermined angle, and the first A first inclined grating plate having an inclined plate and a second inclined plate having an inclination of a predetermined angle; A third inclined plate installed to be spaced apart from a lower end of the first inclined grating plate and having a slope opposite to the first inclined plate, and a fourth inclined plate installed to intersect with the third inclined plate at an angle of inclination; A second inclined grating plate provided; A fifth inclination plate installed to be spaced apart from a lower end of the second inclination grating plate, the inclination opposite to the third inclination plate, and a sixth inclination plate installed to intersect the fifth inclination plate and have an inclination of an angle. An apparatus for treating combustion exhaust gas using an absorbent / adsorbent circulation type multistage filter bag, comprising an N-th gradient grating plate provided. The method of claim 1, The secondary chamber, The upper surface is closed and is formed in the shape of a square cylinder with an open bottom, and is installed in the transverse direction at the upper end thereof, the lower end of which is the first space part 2-1 by the second plate installed the second filter bag, the upper end of the second 2- A second body separated into two space parts; A second hopper extending from the lower end of the second body; A second inlet formed at one side of the second-first space of the second main body so that combustion exhaust gas discharged through the second duct from the duct reactor flows in and connected to the second duct; A second is formed on one side of the second-second space portion of the second body so as to discharge the combustion exhaust gas of the second-second space portion of the second body to the outside through the third duct and connected to the third duct. outlet; And The desulfurization / dehydration mercury absorbent, which is formed at the end of the second hopper and falls from the 2-1 space portion, discharges the desulfurization / dehydration mercury absorbent and the adsorbent to the first circulation pipe. Apparatus for treating combustion exhaust gas using adsorbent circulation multistage filter bag. delete delete As a method for removing various harmful pollutants contained in combustion exhaust gas of a combustion facility, A dust removal process for removing dust contained in combustion exhaust gas in a primary chamber provided with a filter bag; While the dust-free combustion exhaust gas is passed through the duct reactor, the desulfurization / dehydration absorbent, adsorbent and denitrification agent are introduced into the duct reactor, and the contact time and residence of the combustion exhaust gas of the desulfurization / dehydration absorbent, adsorbent and denitrification reducing agent are introduced. Desulfurization / dehydration / primary denitrification processes to increase the time to remove sulfur oxides, mercury and nitrogen oxides in combustion exhaust gas; And Absorbent and adsorption agent, characterized in that the desulfurization / dehydration is composed of a secondary denitrification step of removing the nitrogen oxides in the combustion exhaust gas by introducing a combustion exhaust gas made of primary / denitrification into the secondary chamber to pass through the second filter bag. A method for treating combustion exhaust gas using a circulating multistage filter bag. The method of claim 11, The method for treating combustion exhaust gas using the absorber / adsorbent circulation type multistage filter bag, The desulfurization / dehydration mercury / absorption / desorption mercury discharged from the primary denitrification process further comprises a re-introduction process of regenerating the desulfurization / dehydration mercury absorbent and adsorption to the duct reactor through a circulation pipe. Treatment method of combustion exhaust gas using bag. The method of claim 11, Each step of the method for treating combustion exhaust gas using the absorber / adsorbent circulation type multistage filter bag, A method for treating combustion exhaust gas using an absorbent / adsorbent circulation type multistage filter bag, which is operated in a temperature range of 150 to 350 ° C.

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