KR101864756B1

KR101864756B1 - SIMULTANEOUS REMOVAL APPARATUS OF PM AND SOx IN THE EXHAUST GAS

Info

Publication number: KR101864756B1
Application number: KR1020170146677A
Authority: KR
Inventors: 황성철; 황현수
Original assignee: 겟에스씨알 주식회사
Priority date: 2017-11-06
Filing date: 2017-11-06
Publication date: 2018-06-07

Abstract

Disclosed is an apparatus for simultaneously removing PM and SOx in exhaust gas. According to the present invention, the apparatus for simultaneously removing PM and SOx in exhaust gas comprises: a cyclone chamber including a cylindrical portion into which exhaust gas flows, and a conic portion coupled to a lower portion of the cylindrical portion, wherein a diameter thereof becomes smaller towards a lower portion from an upper portion thereof; and a scrubbing chamber extended into the cyclone chamber by penetrating the upper end of the cyclone chamber. The cyclone chamber includes: a first cleaning liquid spray unit installed on an upper portion of the cylindrical portion to spray cleaning liquid to an inner wall of the cyclone chamber or an outer wall of the scrubbing chamber; and a third cleaning liquid spray unit installed on an inner wall of the cylindrical portion to spray cleaning liquid to the internal space of the cyclone chamber. The scrubbing chamber includes: a second cleaning liquid spray unit to spray cleaning liquid into the scrubbing chamber; and a first packing layer which is installed on a lower portion of the second cleaning liquid spray unit and includes a plurality of packing balls. The exhaust gas flowing into the cyclone chamber circles and descends through a separation space formed between the inner wall of the cyclone chamber and the outer wall of the scrubbing chamber, and then is discharged through the scrubbing chamber to simultaneously remove PM and SOx in a single process.

Description

TECHNICAL FIELD [0001] The present invention relates to a simultaneous treatment of PM and SOx in exhaust gas,

The present invention relates to an apparatus for simultaneous treatment of PM and SOx in an exhaust gas, and more particularly to an apparatus for simultaneous treatment of particulate matter and gaseous substances by combining a cyclone dust collecting function and a scrubbing function .

The exhaust gas discharged to the offshore plant or marine combustion facilities contains gaseous substances such as SOx, NOx and HCI, and particulate matter (PM) such as fine dust and heavy metals.

Generally, the acidic gas such as SOx and HCl is injected with a wet scrubbing technique using water or an additive such as Na or a Ca compound or an additive such as a Ca · Na series to react with an acid gas, It is removed by using dry or semi-dry technology which removes the salt component generated by the reaction of gas with a bag filter. The particulate matter is wet technology for removing dust by spraying water, centrifugal dust collection, inertial dust collection, And is removed by using a dry technique such as electric dust collection and filtration dust collection.

However, in the past, it has been necessary to provide a heterogeneous facility for treating the removal of gaseous matter and particulate matter, which requires a large installation space for the exhaust gas treatment system, and an increase in installation and operation cost of the system There was a problem.

In order to solve this problem, attempts have been made to simultaneously treat gaseous and particulate matter.

Korean Patent No. 10-0681938 discloses a configuration of a scrubber for simultaneously treating gaseous and particulate matter from waste gas.

However, in this patent, the cyclone dust collecting chamber and the wet scrubber chamber are divided into the upper part and the lower part, respectively, in one housing, and the wet scrubbing function and the cyclone dust collecting function are still sequentially performed. Therefore, it can not be said that the wet scrubbing function and the cyclone function are combined in a perfect combination, and the system and the apparatus are complicated and the effect of reducing the installation space is not expected.

Korean Patent No. 10-1066775 discloses a configuration in which a reactant input portion is provided above an exhaust pipe through which exhaust gas is exhausted from a cyclone dust collector.

However, this patent also purifies the acidic gas after the dust collecting function is performed, and the reactant input at the reactant input portion is not only involved in the purification of the acid gas but also in the improvement of the dust collecting function. Therefore, there is a need to provide a separate filtration filter in order to increase the dust collecting efficiency of the centrifugal cyclone having a fine dust reduction performance of usually 60%.

In order to solve the above-mentioned problems, the present invention combines a dust collecting function for removing particulate matter and a scrubbing function for removing gaseous substances, thereby making the system compact and improving the removal efficiency of fine dust to 90% or more To simultaneously provide PM and SOx in the exhaust gas.

For the same purpose, the present invention provides an apparatus for simultaneous treatment of PM and SOx in exhaust gas for simultaneously treating particulate matter and sulfur oxide in exhaust gas.

A simultaneous treatment apparatus for PM and SOx in an exhaust gas according to the present invention includes a cyclone chamber having a cylindrical portion into which exhaust gas flows and a conical portion coupled to a lower portion of the cylindrical portion and having a diameter gradually decreasing from the upper portion to the lower portion; And a scrubbing chamber extending through the upper end of the cyclone chamber and extending into the cyclone chamber, wherein the cyclone chamber is disposed on the upper portion of the cylindrical portion to inject a cleaning liquid into the inner wall of the cyclone chamber or the outer wall of the scrubbing chamber A first cleaning liquid spraying part; And a third cleaning liquid spraying part installed on an inner wall of the cylindrical part to spray a cleaning liquid into the inner space of the cyclone chamber, wherein the scrubbing chamber includes: a second cleaning liquid spraying part for spraying a cleaning liquid into the scrubbing chamber; And a first packing layer disposed at a lower portion of the second cleaning liquid injecting portion and composed of a plurality of packing balls, wherein exhaust gas flowing into the cyclone chamber is formed between an inner wall of the cyclone chamber and an outer wall of the scrubbing chamber And is discharged through the scrubbing chamber after descending through the spacing space.

A plurality of injection nozzles are formed in the first washing liquid spraying part, a part of the plurality of spraying nozzles formed in the first washing liquid spraying part injects the cleaning liquid toward the inner wall of the cyclone chamber, The cleaning liquid can be sprayed toward the outer wall.

The second cleaning liquid spraying part and the first packing layer may be installed in multiple stages inside the scrubbing chamber.

The third cleaning liquid jetting unit may be installed in multiple stages on the inner wall of the cylindrical portion.

A demister may be provided at the exhaust port side of the scrubbing chamber for exhausting the exhaust gas to finally filter the fine particles and moisture remaining in the exhaust gas.

The cyclone chamber may include a second packing layer disposed inside the conical portion and made of a plurality of packing balls; And a fourth cleaning liquid spraying part installed on the second packing layer and spraying the cleaning liquid to the second packing layer.

The diameter of the packing balls constituting the second packing layer may be smaller than the diameter of the packing balls constituting the first packing layer.

The scrubbing chamber may extend only to an inner region of the cylindrical portion.

The particulate matter or gaseous substance in the exhaust gas is adsorbed or dissolved in a cleaning liquid sprayed from the first cleaning liquid spraying portion, the second cleaning liquid spraying portion, the third cleaning liquid spraying portion, or the fourth cleaning liquid spraying portion, And then stored in the water treatment tank along the inclined surface of the conical part.

The washing liquid stored in the water treatment tank may be re-supplied to the first washing liquid injecting unit, the second washing liquid injecting unit, the third washing liquid injecting unit, or the fourth washing liquid injecting unit after being subjected to a water treatment process.

The simultaneous treatment device for PM and SOx in the exhaust gas according to the present invention is not configured to perform the dust collecting function and the scrubbing function in a sequential manner but may be a combination of the particulate matter removal and the gaseous material removal in a single process will be.

According to the present invention, each of the cyclone chamber and the scrubbing chamber is involved in the removal of both particulate matter and gaseous matter, and in particular, by constituting the system to spray the cleaning liquid on not only the inner space of the cyclone chamber but also the wall surface, Can be improved to 90% or more.

According to the present invention, the exhaust gas treatment system can be efficiently operated and the apparatus can be made more compact, thereby reducing the installation space and reducing the installation and operation costs.

1 is a view showing an apparatus for simultaneous treatment of PM and SOx in an exhaust gas according to a first embodiment of the present invention.
2 is a view showing an apparatus for simultaneous treatment of PM and SOx in exhaust gas according to a second embodiment of the present invention.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention. Like reference symbols in the drawings denote like elements.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the following examples can be modified in various forms, and the scope of the present invention is not limited to the following examples.

First Embodiment

1 is a view showing an apparatus for simultaneous treatment of PM and SOx in an exhaust gas according to a first embodiment of the present invention.

Referring to FIG. 1, an apparatus 100 for simultaneously processing PM and SOx in exhaust gas according to the first embodiment of the present invention includes a cyclone chamber 110 into which exhaust gas flows, And a scrubbing chamber (120).

The cyclone chamber 110 is composed of a cylindrical portion 111 into which exhaust gas flows and a conical portion 112 coupled to the lower end of the cylindrical portion 111.

An exhaust gas inlet 113 for introducing the exhaust gas into the cylindrical portion 111 is formed at one side of the upper portion of the cylindrical portion 111.

The exhaust gas inflow portion 113 may be formed on the upper side surface of the cylindrical portion 111 in a direction parallel to the tangential direction of the cylindrical portion 111 wall. The exhaust gas flows parallel to the tangential direction of the wall of the cylindrical portion 111, and flows downward while naturally turning along the inner wall of the cylindrical portion 111.

The conical portion 112 is coupled to the lower portion of the cylindrical portion 111 and is configured such that its diameter gradually decreases from the upper portion to the lower portion.

The scrubbing chamber 120 penetrates the upper end of the cyclone chamber 110 and extends to the inside of the cyclone chamber 110. The lower end of the scrubbing chamber 120 is formed with an inlet through which the exhaust gas flows, .

The scrubbing chamber 120 has a cylindrical shape similar to the cylindrical portion 111 and has a diameter smaller than that of the cylindrical portion 111 so that the outer wall of the scrubbing chamber 120 and the inner wall of the cylindrical portion 111, A spacing space of a certain width is formed.

The particulate matter contained in the exhaust gas has a sufficient centrifugal force while the particulate matter having the centrifugal force collides against the inner wall of the cylindrical portion 111 and falls.

At this time, a first washing liquid spraying part 131 including a plurality of spraying nozzles may be installed on the upper part of the cylindrical part 111.

The first washing liquid injecting section 131 injects the washing liquid in a mist state into the cylindrical section 111. A part of the plurality of injection nozzles formed in the first washing liquid injecting section 131 is injected into the cylindrical section 111 And another portion may be provided to spray the cleaning liquid toward the outer wall of the scrubbing chamber 120. [

As described above, the particulate matter in the exhaust gas flowing in the cylindrical portion 111 collides with the inner wall of the cylindrical portion 111 or the outer wall of the scrubbing chamber 120. At this time, the inner wall of the cylindrical portion 111 When the cleaning liquid flows through the outer wall of the scrubbing chamber 120, the area of contact between the exhaust gas and the cleaning liquid is increased, so that the particulate matter can be more easily adsorbed to the new semen, do.

The cleaning liquid sprayed from the first cleaning liquid spraying unit 131 may be a basic liquid such as a sodium hydroxide (NaOH) solution and neutralize an acidic substance such as SOx contained in the exhaust gas.

Since the first washing liquid injecting part 131 is installed on the upper part of the cyclone chamber 110, it is possible to use the apparatus for simultaneously treating the PM and SOx in the exhaust gas according to the present invention for washing the inside. For this purpose, a plurality of injection nozzles formed in the first cleaning liquid spraying unit 131 may be provided by high-pressure spray nozzles.

The exhaust gas swirling flow that has reached the conical portion 112 flows into the scrubbing chamber 120 with an upward flow as indicated by an arrow.

Inside the scrubbing chamber 120, a second cleaning liquid spraying unit 132 including a plurality of spray nozzles may be installed. As shown in FIG. 1, the second cleaning liquid spraying unit 132 may be installed in the scrubbing chamber 120 at a predetermined interval. However, the present invention is not limited to this, and the second cleaning liquid spraying section 132 may be freely configured in one or more stages as required.

A first packing layer 141 composed of a plurality of packing balls may be installed under each of the second washing liquid spraying parts 132. [

The second cleaning liquid injector 132 injects a basic solution such as sodium hydroxide solution into the scrubbing chamber 120 to neutralize acidic substances such as SOx contained in the exhaust gas flowing into the scrubbing chamber 120.

At this time, the first packing layer 141 functions to increase the removal efficiency of the SOx by increasing the contact area so that the exhaust gas flowing into the scrubbing chamber 120 can sufficiently contact the cleaning liquid.

Of course, although the SOx contained in the exhaust gas may be neutralized to some extent by the cleaning liquid injected from the first cleaning liquid injecting section 131, full-scale removal of SOx may occur in the scrubbing chamber 120 in which the first packing layer 141 is installed It can be said that it is done.

The first packing layer 141 composed of a plurality of packing balls increases the chance of gas-liquid contact between the exhaust gas and the cleaning liquid, and also acts to secondarily filter particulate matter that has not been treated in the cyclone chamber 110 .

Preferably, the packing balls constituting the re-packed layer 141 may have a diameter of about 1 to 7 inches.

A demister 150 may be installed on the exhaust gas outlet side of the scrubbing chamber 120. The demister 150 finally filters out the remaining fine particles or moisture in the exhaust gas, and the purified gas is discharged to the atmosphere through the upper end of the scrubbing chamber 120.

The washing liquid sprayed from the first washing liquid injecting section 131 and the second washing liquid injecting section 132 adsorbs or dissolves the particulate matter or gaseous material in the exhaust gas in the process of falling into the conical section 112, And is stored in the water treatment tank 160 along the inclined surface of the conical portion 112.

The washing liquid stored in the water treatment tank 160 may be supplied to the first and second washing liquid injecting parts 131 and 132 through the washing liquid circulating line 170 after being subjected to a water treatment process.

A circulation pump 171 for circulating and supplying the cleaning liquid and a heat exchanger 172 for lowering the temperature of the cleaning liquid may be installed on the cleaning liquid circulation line 170.

The apparatus for simultaneous treatment of PM and SOx in the exhaust gas according to the present invention includes a monitoring unit (not shown) for monitoring the components of exhaust gas discharged to the upper portion of the scrubbing chamber 120, (Not shown) for controlling the supply of the cleaning liquid through the cleaning liquid supply unit 170.

Second Embodiment

2 is a view showing an apparatus for simultaneous treatment of PM and SOx in exhaust gas according to a second embodiment of the present invention. Since the second embodiment is constituted by further adding constituent elements to the first embodiment, the description of the same constitution as the first embodiment will be omitted.

The apparatus 100 'for simultaneous treatment of PM and SOx in exhaust gas according to the second embodiment of the present invention includes a third cleaning liquid spraying part 133 provided on the inner wall of the cylindrical part 111 and including a plurality of spray nozzles .

As shown in FIG. 2, the third washing liquid injecting unit 133 can be installed in multiple stages on the inner wall of the cylindrical part 111, and the washing liquid is misted into the cylindrical part 111 through a plurality of injection nozzles Spray. The third cleaning liquid spraying part 133 may be freely configured in one or more stages as in the second cleaning liquid spraying part 132. [

Liquid contact between the exhaust gas and the cleaning liquid is achieved not only on the inner wall of the cylindrical portion 111 but also on the inner space of the cylindrical portion 111. As a result, the particulate matter contained in the exhaust gas is absorbed by moisture, .

Since the particulate matter absorbed moisture becomes a liquid by-product and can fall down by its own weight, the weight of the particulate matter and the centrifugal force increase proportionally, and the dust collecting efficiency is greatly improved, and the fine particles Dust collecting becomes possible.

That is, the first washing liquid spraying unit 131 injects the cleaning liquid to the inner wall of the cylindrical portion 111 or the outer wall of the scrubbing chamber 120 to cause inertial collision with the inner wall of the cylindrical portion 111 or the outer wall of the scrubbing chamber 120 And the third cleaning liquid spraying part 133 serves to increase the weight by allowing the particulate matter to absorb moisture by spraying the cleaning liquid into the space inside the cylindrical part 111 do.

A part of the plurality of injection nozzles formed in the third cleaning liquid spraying part 133 may be arranged to spray the cleaning liquid toward the inner wall of the cylindrical part 111 or the outer wall of the scrubbing chamber 120. [ In this case, the spray nozzle formed nearest to the inner wall of the cylindrical part 111 in the third spray liquid spray part 133 faces the inner wall of the cylindrical part 111, It can be installed facing the outer wall.

Like the first and second cleaning liquid spraying parts 131 and 132, the cleaning liquid sprayed from the third cleaning liquid spraying part 133 may be a basic liquid such as sodium hydroxide solution.

The third cleaning liquid spraying part 133 disperses and supplies the cleaning liquid to the inner space of the cylindrical part 111. Therefore, it is possible to neutralize the SOx contained in the exhaust gas more effectively than to spray the cleaning liquid only on the wall surface as in the first embodiment .

Of course, in the first embodiment or the second embodiment, another part of the plurality of injection nozzles formed in the first cleaning liquid spraying part 131 is configured to spray the cleaning liquid toward the inner space of the cyclone chamber 110 It is also possible.

The apparatus 100 'for simultaneous treatment of PM and SOx in exhaust gas according to the second embodiment of the present invention includes a second packing layer 142 formed inside a conical portion 112 and composed of a plurality of packing balls, 2 packing layer 142 and a fourth cleaning liquid spraying part 134 including a plurality of spraying nozzles.

According to the first embodiment, the falling particulate matter or fine droplets in the cleaning liquid are scattered and may flow together with the upward flow of the exhaust gas into the scrubbing chamber 120. This is because, when the swirling flow of the exhaust gas is formed also in the conical portion 112, a stronger upward flow is generated, and particulate matter or fine droplets are scattered by the inclined surface of the conical portion 112 and can be incorporated into the upward flow of the exhaust gas Because.

In order to prevent this, in the second embodiment, the particulate matter in the exhaust gas reaching the lower portion of the cylindrical portion 111 is removed by the cleaning liquid injected from the second packing layer 142 and the fourth cleaning liquid injecting portion 134, And the gaseous material is once again adsorbed.

The second packing layer 142 hardly generates a swirling flow in the conical portion 112 and the particulate matter is injected into the fourth cleaning liquid injecting portion 134 by the second packing layer 142, So that the problem of scattering does not occur since the cleaning liquid is discharged downward together with the cleaning liquid.

The diameter of the packing balls constituting the second packing layer 142 is preferably smaller than the diameter of the packing balls constituting the first packing layer 141. [ More preferably, the packing balls of the second packing layer 242 may be provided to have a diameter of about 0.5 to 3 inches.

The second packing layer 142 may be installed on the upper side of the conical part 112 and the fourth cleaning liquid injecting part 134 provided on the upper side of the second packing layer 142 may include a cylindrical part 111, And may be installed at a height position where the conical portion 112 is engaged.

For this purpose, the scrubbing chamber 120 preferably does not extend further down than the lower end of the cylindrical portion 111. That is, the scrubbing chamber 120 extends only to the inner region of the cylindrical portion 111, and the lower end of the scrubbing chamber 120 and the lower end of the second packing layer 120 are connected to the lower end of the scrubbing chamber 120, 142, respectively.

The cleaning liquid sprayed from the fourth cleaning liquid spraying unit 134 may also be a basic liquid such as sodium hydroxide solution.

The washing liquid injected from the first to fourth washing liquid injecting sections 131, 132, 133 and 134 adsorbs or dissolves particulate matter or gaseous substances in the process of falling into the conical section 112, And is stored in the water treatment tank 160 along an inclined surface of the water treatment tank 160. The subsequent processing method is the same as in the first embodiment.

While the present invention has been particularly shown and described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And should not be construed as limiting the scope of the invention.

110: Cyclone chamber 111: Cylinder part
112: conical portion 113: exhaust gas inlet portion
120: scrubbing chamber 131: first cleaning liquid dispensing part
132: second cleaning liquid spraying part 133: third cleaning liquid spraying part
134: fourth cleaning liquid spraying part 141: first packing layer
142: second packing layer 150: demister
160: Water treatment tank 170: Cleaning liquid circulation line
171: circulation pump 172: heat exchanger

Claims

A simultaneous treatment device for PM and SOx in an exhaust gas for simultaneously treating particulate matter and sulfur oxide in exhaust gas,
A cyclone chamber having a cylindrical portion into which exhaust gas flows and a conical portion coupled to a lower portion of the cylindrical portion and having a diameter gradually decreasing from an upper portion to a lower portion; And
And a scrubbing chamber penetrating the upper end of the cyclone chamber and extending into the cyclone chamber,
The cyclone chamber may include a first cleaning liquid spraying unit installed on the upper portion of the cylindrical portion and spraying a cleaning liquid to an inner wall of the cyclone chamber or an outer wall of the scrubbing chamber; A third cleaning liquid spraying unit installed on an inner wall of the cylindrical portion to spray a cleaning liquid into the inner space of the cyclone chamber; A second packing layer provided on the upper side of the conical part and composed of a plurality of packing balls; And a fourth cleaning liquid spraying part installed on the second packing layer and spraying the cleaning liquid to the second packing layer,
Wherein the scrubbing chamber includes: a second cleaning liquid spraying unit for spraying a cleaning liquid into the scrubbing chamber; And a first packing layer disposed at a lower portion of the second cleaning liquid injecting portion and composed of a plurality of packing balls,
The exhaust gas flowing into the cyclone chamber is swirled down through a space formed between an inner wall of the cylindrical portion and an outer wall of the scrubbing chamber and then discharged through the scrubbing chamber,
Characterized in that the exhaust gas descending in the cyclone chamber does not form a swirling flow inside the conical portion by the second packing layer.
Simultaneous treatment of PM and SOx in exhaust gas.

The method according to claim 1,
A plurality of spray nozzles are formed in the first washing liquid spray portion,
Wherein a part of the plurality of injection nozzles formed in the first cleaning liquid spraying part injects the cleaning liquid toward the inner wall of the cyclone chamber and the other part injects the cleaning liquid toward the outer wall of the scrubbing chamber.
Simultaneous treatment of PM and SOx in exhaust gas.

The method according to claim 1,
Wherein the second cleaning liquid spraying part and the first packing layer are installed in multiple stages inside the scrubbing chamber.
Simultaneous treatment of PM and SOx in exhaust gas.

The method of claim 3,
Characterized in that the third cleaning liquid spraying portion is provided in multiple stages on the inner wall of the cylindrical portion.
Simultaneous treatment of PM and SOx in exhaust gas.

The method according to claim 1,
Characterized in that a demister is provided at the outlet side of the scrubbing chamber for discharging the exhaust gas to ultimately filter the fine particles and moisture remaining in the exhaust gas.
Simultaneous treatment of PM and SOx in exhaust gas.

The method according to claim 1,
The packing balls constituting the first packing layer have a diameter of 1 to 7 inches,
The packing balls constituting the second packing layer have a diameter of 0.5 to 3 inches,
Wherein a diameter of a packing ball constituting the second packing layer is smaller than a diameter of a packing ball constituting the first packing layer.
Simultaneous treatment of PM and SOx in exhaust gas.

The method according to claim 1,
Wherein a diameter of a packing ball constituting the second packing layer is smaller than a diameter of a packing ball constituting the first packing layer.
Simultaneous treatment of PM and SOx in exhaust gas.

The method according to claim 1,
Characterized in that the scrubbing chamber extends only to the inner region of the cylindrical portion.
Simultaneous treatment of PM and SOx in exhaust gas.

The method according to claim 1,
The particulate matter or gaseous substance in the exhaust gas is adsorbed or dissolved in a cleaning liquid sprayed from the first cleaning liquid spraying portion, the second cleaning liquid spraying portion, the third cleaning liquid spraying portion, or the fourth cleaning liquid spraying portion, And then stored in the water treatment tank along the inclined surface of the conical part after falling to the conical part.
Simultaneous treatment of PM and SOx in exhaust gas.

The method of claim 9,
Characterized in that the cleaning liquid stored in the water treatment tank is supplied again to the first cleaning liquid spraying part, the second cleaning liquid spraying part, the third cleaning liquid spraying part, or the fourth cleaning liquid spraying part after being subjected to a water treatment process.
Simultaneous treatment of PM and SOx in exhaust gas.