KR101453341B1 - Wet Scrubber Systme Combined With Electrostatic Induction - Google Patents

Abstract

Disclosed is an electrostatic complex wet scrubber system. According to the electrostatic complex wet scrubber system of the present invention, a scrubber system of exhaust gas comprises: a wet scrubber main body which desulfurizes and dedusts the exhaust gas by spraying a cleaning solution onto the exhaust gas; an electrostatic inductor installed in an exhaust gas incoming unit of the wet scrubber main body, which electrostatic-induces the exhaust gas and and provides the same to the wet scrubber main body; a cleaning solution providing unit which provides the cleaning solution to the wet scrubber main body; and a controlling and monitoring unit which analyzes components of the exhaust gas and controls the cleaning solution providing unit. The system desulfurizes and dedusts the exhaust gas by gas-liquid contact and electrostatic induction.

Description

{Wet Scrubber Combined With Electrostatic Induction}

The present invention relates to an electrostatic combined wet scrubber system, and more particularly, to an electrostatic combined wet scrubber system, which is provided with a wet scrubber body, which is desulfurized and exhausted by injecting a cleaning liquid into an exhaust gas, And a control and monitoring unit for analyzing the components of the exhaust gas and controlling the cleaning liquid supply unit, wherein the control and monitoring unit includes: an electrostatic induction unit for supplying the cleaning liquid to the main body; a cleaning liquid supply unit for supplying the cleaning liquid to the wet scrubber main body; And exhausting the electrostatic combined wet scrubber system.

The problem of air pollution and global warming due to the increase of fossil fuel consumption due to the rapid progress of industrialization is becoming serious.

One of the main causes of this air pollution is sulfur oxides (SOx) and nitrogen oxides (NOx) contained in exhaust gas of engines, thermal power plants and factories of vehicles. Emissions regulation of each country is being introduced.

Nitrogen oxides and sulfur oxides among the exhaust gases emitted from vessels are representative air pollutants that are regulated by the International Maritime Organization (IMO), the United Nations agency, Sulfur Emission Control Area).

As for the regulation of nitrogen oxides, the standard value is applied at 14.3 g / kWh by TIER Ⅱ, which came into effect in January 2011, and from 2016 it was reduced to 80% of TIER Ⅰ standard and the standard value of 3.4 g / ㎾h Is applied.

In order to meet various emission control standards, various facilities are generally applied to the exhaust gas containing sulfur oxides (SOx), particulate matter, etc. in industrial combustion facilities or two-stroke ship internal combustion engines have.

In the case of such a conventional exhaust gas treatment apparatus, sulfur oxides are configured to treat particulate matter, that is, fine particles, by treating with a flue gas desulfurization apparatus (FGD) and then generating an electric field using a dry electrostatic precipitator .

However, the above-mentioned flue gas desulfurization apparatus has an increase in the initial investment cost and the operation ratio, and there is a problem that the optimum process combination of denitrification and desulfurization processes is required. Particularly, when the flue gas desulfurization apparatus is used, the overall scale becomes large and the use of the flue gas desulfurization apparatus is disadvantageous because of the back pressure increase problem.

In the case of a dry electrostatic precipitator for collecting and treating fine particles, there is a problem that the dust collecting performance is lowered due to the collection of fine particles on the dust collecting plate. To solve this problem, a device for spraying washing water onto the dust collecting plate has been developed , There is a problem that the dust collecting plate of the metal material is not only easily corroded but also it is difficult to supply high voltage due to the problem of spark generation.

In addition, in the case of the conventional electric dust collector, a method of arranging a plurality of dust collecting plates in parallel to form a space and then collecting the fine particles through an electric field formed in the space is used. However, when the dust collecting plates are arranged in parallel, There was a problem.

Accordingly, there is a growing interest in equipment that can solve these conventional problems and effectively treat and control the exhaust gas including sulfur oxides and fine particles.

Korean Registered Patent No. 10-1341479 (published on December 13, 2013)

Conventionally, a denitration, a desulfurization, and a exhaustion system are provided for exhaust gas treatment, respectively, and an exhaust gas measurement analyzer and a control system are also separated into respective products. Accordingly, the system for exhaust gas treatment has a large scale, and in particular, the size of the reactor has increased in order to improve the exhaust gas treatment efficiency. In addition, since the exhaust gas measurement analyzer analyzes the gas by suction from the pipe, there is a problem in that a separate piping for suction is required. Therefore, after a certain time, the standard value of the analyzer must be re-calibrated through the calibration, .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a scrubber system for an exhaust gas that is compact, has high exhaust gas treatment efficiency, and can be effectively controlled.

According to an aspect of the invention, there is provided a scrubber system for an exhaust gas,
A wet scrubber body in which a cleaning liquid is injected into the exhaust gas and is desulfurized and exhausted;
An electrostatic induction unit provided in an exhaust gas inlet of the wet scrubber body to supply electrostatic induction to the wet scrubber body;
A cleaning liquid supply unit for supplying the cleaning liquid to the wet scrubber body; And
And a control and monitoring unit for analyzing the components of the exhaust gas and controlling the cleaning liquid supply unit, wherein the exhaust gas is desulfurized and exhausted by gas-liquid contact and electrostatic induction,
Wherein the cleaning liquid supply unit comprises: a storage tank for storing the cleaning liquid discharged from the exhaust gas to a lower portion of the wet scrubber body after desulfurization and exhaustion; A centrifugal separator provided downstream of the storage tank for centrifuging the cleaning liquid; And a line extending from the centrifuge to the outside of the scrubber system,
The cleaning liquid supply unit may include a closed loop in which the cleaning liquid is supplied to the wet scrubber body and is desulfurized and exhausted after the exhaust gas is exhausted and circulated to the wet scrubber body through the centrifugal separator or the cleaning liquid is supplied to the wet scrubber body Wherein the exhaust gas is discharged after desulfurization and exhaustion of the exhaust gas, and is selectively driven to an open loop which is discharged to the outside of the scrubber system via the centrifugal separator.

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Preferably, the cleaning liquid supply unit includes a sodium hydroxide supply tank for storing sodium hydroxide solution supplied as a cleaning liquid to the wet scrubber body when driven by a closed loop, and a sodium hydroxide supply tank for supplying a cleaning liquid to the wet scrubber body, And a storage tank in which the cleaning liquid discharged from the exhaust gas to the lower portion of the wet scrubber body after desulfurization and exhausting is stored. The storage tank may be selectively driven by a closed loop and an open loop.

Preferably, the cleaning liquid supply unit further comprises a centrifugal separator provided downstream of the storage tank for centrifugally separating the cleaning liquid, wherein the sodium hydroxide solution centrifuged from the centrifugal separator is supplied to the sodium hydroxide supply tank, Can be circulated to the scrubber body.

Preferably, the exhaust gas passing through the electrostatic induction unit flows into an exhaust gas inlet portion provided on a lower side surface of the wet scrubber body, and the exhaust gas that has been denitrified and desulfurized is discharged to an upper portion of the main body, Like shape.

Preferably, the control and monitoring unit includes an analyzer for analyzing a component of the exhaust gas in at least one of upstream and downstream of the wet scrubber body, a control unit for controlling the cleaning liquid supply unit, and a monitoring unit for monitoring the analyzer and the control unit .

Preferably, the analyzer analyzes the components of the exhaust gas sensed by the sensor within at least one of upstream and downstream of the wet scrubber body, and can be auto-calibrated.

Preferably, in the analyzer, the component of the exhaust gas is measured in real time and can be confirmed by the monitoring unit, and the control and monitoring unit can be remotely controlled in conjunction with the portable electronic device.

Preferably, the wet scrubber body is provided with at least one packing layer including a plurality of packing balls, and the cleaning liquid from the cleaning liquid supply unit is flow-analyzed and sprayed onto the upper portion of the packing layer .

An electrostatic combined wet scrubber system of the present invention comprises a wet scrubber body which is desulfurized and exhausted by injecting a cleaning liquid into an exhaust gas, an electrostatic induction unit provided in an exhaust gas inlet portion of the wet scrubber body for supplying electrostatic induction to the wet scrubber body, And a control and monitoring unit for analyzing the components of the exhaust gas and controlling the cleaning liquid supply unit, so that the exhaust gas can be desulfurized and exhausted by gas-liquid contact and electrostatic induction. The exhaust gas can be supplied to the inside of the wet scrubber body by a uniform and uniform flow by electrostatic induction of the exhaust gas through the electrostatic induction unit. Therefore, the exhaust gas treatment efficiency can be improved without increasing the size of the reactor.

In this system, the cleaning liquid supply unit can be selectively driven by a closed loop and an open loop, thereby enabling a variable and effective system operation.

Further, by providing a straight type wet scrubber body without providing a venturi type piping in the exhaust gas inflow portion, differential pressure due to bent inflow portions is generated, the installation is easy, and space utilization is high.

In this system, the cleaning liquid is supplied to the inside of the wet scrubber body through the flow analysis, thereby optimizing the spraying of the cleaning liquid and reducing the dead zone, thereby enabling efficient exhaust gas processing.

In addition, the sensor type analyzer can check and control the exhaust gas analysis value in real time through the integrated system in the control unit, and there is no need to provide a separate suction piping in the piping. Automatic calibration also eliminates the need for a standard gas supply to recalibrate the analyzer, and requires no specialist personnel to do so, which improves economy and operational efficiency.

The system can be remotely controlled in conjunction with a portable electronic device, so that the exhaust gas treatment system can be effectively controlled and monitored without any place and time limit.

Figure 1 schematically illustrates an electrostatic combined wet scrubber system in accordance with an embodiment of the present invention.
Figure 2 shows a packing ball which may be provided in the inner packing layer of the wet scrubber body in the embodiment shown in Figure 1.
FIG. 3 shows a system in which the system of the present invention is remotely controlled by interlocking with a portable electronic device.

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.

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

FIG. 1 schematically shows an electrostatic combined wet scrubber system according to an embodiment of the present invention.

Examples of the exhausting equipment for discharging the exhaust gas to which the present embodiment can be applied include a ship, an onshore power plant, and an internal combustion engine such as an engine of a steel mill. This embodiment can be applied for the exhaust gas treatment of such an exhaust facility.

As shown in FIG. 1, the electrostatic combined wet scrubber system of the present embodiment is a scrubber system of exhaust gas, which comprises a wet scrubber main body 100 in which a scrubbing liquid is sprayed to an exhaust gas and desulfurized and exhausted, A cleaning liquid supply unit 200 for supplying a cleaning liquid to the wet scrubber main body, a control unit for controlling the cleaning liquid supply unit and analyzing the components of the exhaust gas, And a monitoring unit (300), characterized in that the exhaust gas is desulfurized and exhausted by gas-liquid contact and electrostatic induction.

The cleaning liquid supply unit 200 of this embodiment includes a sodium hydroxide supply tank 230 for storing a sodium hydroxide solution supplied as a cleaning liquid to the wet scrubber body when driven in a closed loop and a sodium hydroxide supply tank 230 for supplying the cleaning liquid to the wet scrubber body And a storage tank 250 in which a washing liquid discharged from the exhaust gas to the lower portion of the wet scrubber body is desulfurized and desorbed from the exhaust gas is stored, a closed type loop and an open type loop.

The cleaning liquid supply unit 200 is provided with a centrifugal separator 210 for centrifuging the cleaning liquid downstream of the storage tank and a sludge tank 220 for storing the sludge separated from the centrifugal separator 210. In the centrifugal separator 210, The sodium hydroxide solution from which the sludge has been removed by centrifugation can be supplied to the sodium hydroxide supply tank and circulated to the wet scrubber body 100 to be driven in a closed loop.

As described above, according to the present embodiment, the cleaning liquid supply unit 200 can be selectively driven in a closed loop and an open loop by using sodium hydroxide solution and seawater as a cleaning liquid, thereby enabling a variable and effective system operation according to the situation.

The centrifugal separator 210 may be replaced with a pump and a multi-cyclone. In this embodiment, however, the centrifugal separator 210 is provided to reduce the number of components of the system, thereby realizing a more compact system.

The wet scrubber body 100 is provided in a straight pipe shape so that exhaust gas flows into the lower side surface, and exhaust gas that has been denitrified and desulfurized is discharged to an upper portion of the body.

In the wet scrubber body 100 of the present embodiment, at least one packing layer including a plurality of packing balls is provided. Since a packing ball that can be operated in a low back pressure system is applied , It is not necessary to provide a venturi-shaped pipe provided in the reactor inflow section in the high back pressure system, and installation and space utilization can be increased. Also, when the venturi type piping is installed, the differential pressure due to the bent inflow portion does not occur.

FIG. 2 shows a packing ball which may be provided in the inner packing layer of the wet scrubber body 100.

The cleaning liquid, such as sodium hydroxide solution or seawater, is supplied from the cleaning liquid supply unit 200 to the upper part of the packing layer through the flow analysis. At this time, the packing layer composed of the packing balls is contacted with the cleaning liquid injected into the sulfur oxide Thereby increasing the contact area and increasing the efficiency.

Also, in this embodiment, the cleaning liquid is supplied to the interior of the wet scrubber body 100 through the flow analysis, thereby optimizing the spraying of the cleaning liquid and reducing the dead zone, thereby effectively treating the exhaust gas.

On the other hand, a denitration facility (not shown) capable of removing nitrogen oxides from the exhaust gas to be introduced into the reactor may be additionally provided upstream of the wet scrubber body 100, and the denitration facility is not harmful to the nitrogen oxides in the exhaust gas Selective catalytic reduction can be applied.

The exhaust gas from which the nitrogen oxide is removed through the denitration facility is supplied to the wet scrubber main body 100 through the electrostatic induction machine 110. The exhaust gas can be supplied to the inside of the wet scrubber main body 100 in a uniform and uniform flow by electrostatic induction of the exhaust gas through the electrostatic generator, thereby improving the efficiency of the exhaust gas treatment without increasing the size of the reactor.

A particular matter in the charged exhaust gas may be collected in a packing layer and drained to the lower portion of the reactor together with the cleaning liquid sprayed into the wet scrubber body 100.

The control and monitoring unit 300 of the present embodiment includes an analyzer 310 for analyzing a component of exhaust gas in at least one of upstream and downstream of the wet scrubber main body 100 and a control unit 320 for controlling the cleaning liquid supply unit 200 And a monitoring unit 330 for monitoring the analyzer and the control unit.

As described above, the control and monitoring unit 300 is provided with an analysis function. In particular, a sensor-type analyzer is provided to analyze the components of the exhaust gas detected by the sensor in at least one of upstream and downstream of the scrubber . By providing a sensor type analyzer, there is no need to provide a separate suction piping for analyzing the exhaust gas component in the exhaust gas piping, and it is possible to effectively monitor and control the components of the exhaust gas in real time.

The components in the exhaust gas that can be analyzed by the analyzer 310 are NO, NO2, NOx, SO2, PM, CO, CO2, HCL,

Also, since the analyzer 310 is configured to be auto-calibrated, there is no need to separately calibrate the standard gas to recalibrate, and there is no need to arrange specialist personnel for it, which makes it possible to operate the system more economically.

The components of the exhaust gas are measured by the analyzer 310 in real time and can be checked by the monitoring unit 330.

The control and monitoring unit 300 of the present embodiment can be disposed in a site where the scrubber main body is provided. However, the control and monitoring unit 300 can be distributed and arranged in the cabin so that the system can be monitored and controlled in the cabin. And can be remotely controlled in conjunction with the device, so that the exhaust gas treatment can be monitored and controlled without any place or time limit.

FIG. 3 shows an operation demonstration photograph in which the system of this embodiment is linked to a smart phone and is remotely controlled while checking in real time.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

100: Wet scrubber body
110:
200: cleaning liquid supply unit
210: Centrifuge
220: sludge tank
300: Control and monitoring section

Claims (8)

In a scrubber system of exhaust gas,
A wet scrubber body in which a cleaning liquid is injected into the exhaust gas and is desulfurized and exhausted;
An electrostatic induction unit provided in an exhaust gas inlet of the wet scrubber body to supply electrostatic induction to the wet scrubber body;
A cleaning liquid supply unit for supplying the cleaning liquid to the wet scrubber body; And
And a control and monitoring unit for analyzing the components of the exhaust gas and controlling the cleaning liquid supply unit, wherein the exhaust gas is desulfurized and exhausted by gas-liquid contact and electrostatic induction,
Wherein the cleaning liquid supply unit comprises: a storage tank for storing the cleaning liquid discharged from the exhaust gas to a lower portion of the wet scrubber body after desulfurization and exhaustion; A centrifugal separator provided downstream of the storage tank for centrifuging the cleaning liquid; And a line extending from the centrifuge to the outside of the scrubber system,
The cleaning liquid supply unit may include a closed loop in which the cleaning liquid is supplied to the wet scrubber body and is desulfurized and exhausted after the exhaust gas is exhausted and circulated to the wet scrubber body through the centrifugal separator or the cleaning liquid is supplied to the wet scrubber body Wherein the exhaust gas is discharged after desulfurization and exhaustion of the exhaust gas, and can be selectively driven to an open loop discharged through the centrifugal separator to the outside of the scrubber system through the line. The cleaning apparatus according to claim 1, wherein the cleaning liquid supply unit
A sodium hydroxide supply tank for storing a sodium hydroxide solution supplied as a cleaning liquid to the wet scrubber body when driven in a closed loop; And
And a seawater supply tank for storing seawater supplied as a cleaning liquid to the wet scrubber body when driven in an open loop,
A closed loop by sodium hydroxide solution, or an open loop by seawater. ≪ Desc / Clms Page number 13 > delete The method according to claim 1,
The exhaust gas passing through the electrostatic induction unit flows into an exhaust gas inlet portion provided on a lower side surface of the wet scrubber body, the exhaust gas desulfurized and exhausted is discharged to an upper portion of the main body,
Wherein the wet scrubber body is in the form of a straight pipe. 2. The apparatus of claim 1, wherein the control and monitoring unit
An analyzer for analyzing the components of the exhaust gas upstream and downstream of the wet scrubber body;
A control unit for controlling the cleaning liquid supply unit; And
And a monitoring unit for monitoring the analyzer and the control unit. 6. The method of claim 5,
Wherein the analyzer analyzes the components of the exhaust gas sensed by the sensor in at least one of upstream and downstream of the wet scrubber body and is auto-calibrated. The method according to claim 6,
Wherein the analyzer can measure the components of the exhaust gas in real time and can be confirmed by the monitoring unit. The method according to claim 1,
Wherein at least one packing layer including a plurality of packing balls is provided in the wet scrubber body,
Wherein the cleaning liquid is sprayed to the upper portion of the packing layer from the cleaning liquid supply portion.

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