KR101620994B1 - Hydrogen sulfide removing apparatus with vapor-liquid contact disk - Google Patents

Abstract

According to one embodiment of the present invention, an apparatus for removing hydrogen sulfide, having a gas-liquid contact disk is provided. The apparatus for removing hydrogen sulfide comprises: a tank including a flow passage of biogas therein, and configured to collect a liquid catalyst which is sprayed into the biogas; a spray nozzle equipped in the tank to spray the liquid catalyst to be made to chemically react with the biogas; a gas-liquid contact disk installed in the tank to rotate on an upper side of the liquid catalyst collected in the tank, and configured to allow the biogas flowing along the flow passage and the liquid catalyst sprayed by the spray nozzle to pass; and a washing nozzle fixed into the tank to spray liquid catalyst to wash the gas-liquid contact disk onto a surface of the gas-liquid contact disk.

Description

HYDROGEN SULFIDE REMOVING APPARATUS WITH VAPOR-LIQUID CONTACT DISK [0002]

The present invention relates to a hydrogen sulfide removal apparatus for removing hydrogen sulfide from biogas generated during the treatment of organic wastes, and more particularly, to a hydrogen sulfide removal apparatus having a disk-shaped gas-liquid contact layer.

BACKGROUND ART Recently, technologies for producing biogas such as methane by anaerobic digestion of organic waste such as food waste, livestock manure, sewage sludge, and the like are being developed. Such biogas production and utilization methods are attracting attention because biogas can be used as an energy source and the environmental pollution load can be reduced.

Biogas obtained through anaerobic digestion of organic wastes contains hydrogen sulfide (H2S) in addition to methane gas. This hydrogen sulphide is produced by sulfur-reducing bacteria that reduce sulfur and sulfate. However, such hydrogen sulfide is not only harmful to the human body, but also can be converted into sulfur dioxide and sulfuric acid when the biogas is recycled, thereby eroding a device using biogas as an energy source. Therefore, it is essential to remove hydrogen sulfide to recycle biogas.

At present, a technique of using a liquid catalyst for removing hydrogen sulfide is known. According to this technique, the liquid catalyst is injected into the biogas moving from the inlet to the outlet, and then the hydrogen sulfide is removed from the biogas by the chemical reaction. At this time, in order to increase the contact area and the contact time between the biogas and the liquid catalyst, a gas-liquid contact layer is generally provided on the moving path of the biogas, and the gas-liquid contact layer is provided with pall rings It is filled.

These prior art examples are disclosed in Patent No. 10-1462054 (hydrogen sulfide and harmful gas removing apparatus), Patent No. 10-0406495 (system for treating hydrogen sulfide and VOCs using liquid catalyst and biofilter), Patent No. 10- No. 0766125 (a hydrogen sulfide removing apparatus using a liquid catalyst), and Japanese Patent No. 10-1330499 (a digester gas desulfurization apparatus using a liquid catalyst).

Registration No. 10-1462054 (hydrogen sulfide and harmful gas removing device) Registration No. 10-0406495 (Treatment system of hydrogen sulfide and VOCs using liquid catalyst and biofilter) Registration No. 10-0766125 (hydrogen sulfide removal device using liquid catalyst) Registration No. 10-1330499 (digestion gas desulfurization apparatus using liquid catalyst)

In the above prior art, a byproduct of the chemical reaction between the biogas and the liquid phase catalyst is formed. Some of these precipitates are attached to the surface of the poles and the rest fall down. Precipitates on the surfaces of the polls cause a decrease in the removal efficiency of the hydrogen sulfide, so that the polling must be cleaned, but it is almost impossible to clean all of the polls housed in the mold as they are. Thus, for the cleaning of polls, a complex process must be performed such as shutting down the hydrogen sulphide removal device, withdrawing polls, cleaning the polls, and reinstalling the cleaned polls. In addition, it is the present situation that the polling is frequently performed because the cleaning is not performed on time, and the polling condition is so severe that the cleaning can not be improved by the cleaning. As a result, in the conventional technology, much time, effort, and cost are required to maintain / repair the hydrogen sulfide removal device.

In addition, in the prior art, as described above, although the precipitates adhere to the surfaces of the polls, they can not be cleaned immediately, so that the holes possessed by the polls are inevitably large. However, the greater the number of holes in the poling, the smaller the contact area and the contact time between the biogas and the liquid catalyst and the lower the hydrogen sulfide removal efficiency. Therefore, according to the prior art, there is a problem that the improvement of the hydrogen sulfide removal efficiency is limited.

Therefore, the present invention is intended to provide a technique capable of solving the above problems.

According to an aspect of the present invention, there is provided a fuel cell system comprising: a tank having a transfer path of a biogas therein and capable of collecting a liquid catalyst injected with the biogas; A spray nozzle provided inside the tank for spraying a liquid catalyst to chemically react with the biogas; A gas-liquid contact disc provided inside the tank so as to be rotatable above the liquid catalyst collected in the tank, and configured to pass a biogas moving along the moving path and a liquid catalyst sprayed from the spray nozzle; And a cleaning nozzle fixed to the inside of the tank for spraying the liquid catalyst for washing the gas-liquid contact disk onto the surface of the gas-liquid contact disk.

One aspect of the present invention includes a scraper fixed to the inside of the tank to scrape sediments which are by-products of the chemical reaction from the surface of the gas-liquid contact disk. At this time, the scraper is inclined to guide the sediment outward from the center of the gas-liquid contact disk.

According to an aspect of the present invention, the gas-liquid contact disc further includes a frame having an inner plate to which a rotary shaft is fixed, a plurality of fits extending outward from the inner plate, and an outer ring fixed to an outer end of the flesh; And a gas-liquid contact pattern covering the frame.

According to another aspect of the present invention, there is provided a biosensor comprising: a tank having a transfer path of a biogas therein and capable of collecting a liquid catalyst injected with the biogas; A spray nozzle provided inside the tank for spraying a liquid catalyst to chemically react with the biogas; A gas-liquid contact disk fixed inside the tank so as to be positioned above the liquid catalyst collected in the tank, and configured to pass a biogas moving along the moving path and a liquid catalyst sprayed from the spray nozzle; And a cleaning nozzle installed inside the tank so as to rotate along the circumferential direction of the gas-liquid contact disk, for spraying a liquid catalyst for cleaning the gas-liquid contact disk onto the surface of the gas-liquid contact disk, A hydrogen sulfide removing device.

Another aspect of the present invention includes a scraper for scraping a precipitate, which is a by-product of the chemical reaction, from the surface of the gas-liquid contact disk. At this time, the scraper is installed inside the tank so as to rotate together with the cleaning nozzle, and a drop hole for dropping the precipitate scraped by the scraper is provided at the rim of the gas-liquid contact disk.

According to another aspect of the present invention, the gas-liquid contact disk further comprises: an outer ring fixed to the inner surface of the tank; an inner plate located at the center of the outer ring; and a plurality of flesh ; And a gas-liquid contact pattern covering the frame.

In one and other aspects of the present invention, a precipitate dropping tube is provided on the inner surface of the tank to provide a falling path of the precipitate guided by the scraper.

According to the present invention, the gas-liquid contact layer for sufficiently ensuring the contact area between the biogas and the liquid catalyst and the contact time is provided in the form of a disk which is continuously washed. Therefore, first, the gas-liquid contact layer can be cleaned even during the operation of the hydrogen sulfide removal device, and second, the gas-liquid contact area and the contact time are further increased as compared with the prior art, thereby improving the hydrogen sulfide removal efficiency.

Further, according to the present invention, since the scraper which polishes the surface of the gas-liquid contact layer in the disk shape is provided, the cleaning of the gas-liquid contact layer can be performed more cleanly.

According to the present invention, since the gas-liquid contact pod of the disk-shaped gas-liquid contact layer is provided so as to cover the frame supporting the gas-liquid contact pod, the liquid catalyst does not accumulate on the surface of the gas- It is possible to easily wipe the surface of the wafer.

1 is a photograph showing a conventional polling.
FIG. 2 is an internal structural view showing a hydrogen sulfide removing apparatus having a gas-liquid contact disk according to the first embodiment of the present invention.
3 is a perspective view showing the inside of the tank of the hydrogen sulfide removal device shown in FIG.
4 is a perspective view showing a hydrogen sulfide removal device having a gas-liquid contact disk according to a second embodiment of the present invention.
Fig. 5 is a photograph of the gas-liquid contacting cloth shown in Figs. 3 and 4. Fig.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of a hydrogen sulfide removal apparatus having a gas-liquid contact disk according to the present invention will be described in detail with reference to the drawings. It is to be understood that the terminology or words used herein are not to be construed in a limiting sense and that the inventor may properly define the concept of a term to describe its invention in the best possible way And should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

≪ Embodiment 1 >

A hydrogen sulfide removal apparatus 100 having a gas-liquid contact disk according to the first embodiment of the present invention is for removing hydrogen sulfide from biogas generated when digesting organic wastes. As shown in FIGS. 2 and 3, 110, a gas-liquid contact disc 130, an injection nozzle 150, and a cleaning nozzle 152. [

The tank 110 is connected to the front inlet pipe 112 and the rear outlet pipe 114. The biogas introduced into the inflow pipe 112 is discharged to the discharge pipe 114 through the upper internal space of the tank 110. The lower internal space of the tank 110 is used as a collecting space of the liquid catalyst 10 injected with the biogas, while the upper internal space of the tank 110 is used as the biogas moving path. The liquid catalyst 10 and the precipitate (the precipitate is a byproduct of the biogas and liquid-phase catalyst chemical reaction) 20 contained in the lower internal space of the tank 110 are transferred to a subsequent treatment apparatus (for example, a dehydrator) Where the liquid catalyst 10 is separated from the precipitate 20 and then transported to the regeneration tower.

The injection nozzle 150 is fixed to a pipe 154 installed in the upper internal space of the tank 110 so as to be positioned above the gas-liquid contact disc 130. The pipe 154 is connected to a regeneration tower (not shown) for regenerating the used liquid catalyst 10. Therefore, the liquid catalyst 10 collected in the lower internal space of the tank 110 is regenerated in the regeneration tower, and then is jetted from the jet nozzle 150 to the gas-liquid contact disk 150. The number of the injection nozzles 150 may be appropriately selected within a range in which the liquid catalyst 10 is uniformly sprayed on the entire surface of the gas-liquid contact disc 130.

The gas-liquid contact disc 130 is installed in the upper internal space of the tank 110 so as to rotate on the upper side of the liquid catalyst 10 collected in the lower internal space of the tank 110 and includes a frame 134 and a gas- 132).

The frame 134 is for supporting the gas-liquid contact bell 132 and includes an inner plate 134a, a plurality of fissures 134b, and an outer ring 134c. The inner plate 134a is a plate located at the center of the frame 134 and fixed to a rotation shaft 142 extending vertically. The fingers 134b extend radially from the inner plate 134a and the outer ring 134c is fixed to the outer ends of the fingers 134b while connecting the outer ends of the fingers 134b. The rotation shaft 142 is fixed to a driving shaft of the motor 140 installed on the upper surface of the tank 110. When the motor 140 is operated, the frame 134 rotates about a shaft (Z- .

The gas-liquid contact bell 132 is in a form (see Fig. 4) capable of passing both the liquid catalyst 10 injected from the injection nozzle 150 and the biogas rising from the lower side. The gas-liquid contact bell 132 may be fixed to the frame 134 to be positioned between the fingers 134b and may be fixed to the frame 134 to cover one side of the frame 134. [ However, in the case of the former, there is a problem that the liquid catalyst 10 can be accumulated on the surface of the gas-liquid contact bell 132 and a problem that it is difficult to wipe the surface of the gas-liquid contact bell 132 with the scraper 180 described later. Therefore, the gas-liquid contact cloth 132 is preferably provided so as to cover one surface of the frame 134 (in FIG. 3, the upper surface of the frame 134 is covered).

During the operation of the motor 140, the gas-liquid contact disc 130 is rotated about the Z axis in the upper internal space of the tank 110. Meanwhile, the biogas introduced into the inlet pipe 112 flows into the gas- And the liquid catalyst 10 injected from the injection nozzle 150 passes through the gas-liquid contact disc 130 and drops. At this time, in the gas-liquid contact disc 130, a chemical reaction occurs while sufficiently ensuring the contact area and contact time between the biogas and the liquid catalyst 10, resulting in the removal of hydrogen sulfide and the formation of the precipitate 20.

Some of the precipitates 20 formed on the gas-liquid contact disc 130 fall down during the rotation of the gas-liquid contact disc 130 and the rest fall on the surface of the gas-liquid contact disc 130, more specifically, on the surface of the gas- . Liquid contact bubbles 132 need to be continuously cleaned because the precipitate 20 remaining in the gas-liquid contact bubbles 132 deteriorates the hydrogen sulfide removal efficiency while preventing the passage of the biogas and the passage of the liquid catalyst 10 have.

The cleaning nozzle 152 is provided for continuous cleaning of the gas-liquid contact bell 132 and is configured to spray the liquid catalyst 10 from the gas-liquid contact bell 132 to the surface of the gas-liquid contact bell 132 slightly above the gas- And is provided in the pipe 154. A plurality of cleaning nozzles 152 are provided so as to be aligned in a row along the radial direction of the gas-liquid contact disk 130. Due to such a cleaning nozzle 152, the gas-liquid contact cloth 132 can be continuously cleaned during rotation.

The scraper 180 is preferably provided for cleaner cleaning of the gas-liquid contact bell 132. At this time, the scraper 180 is inclined to guide the sediment 20 on the surface of the gas-liquid contact bell 132 outward from the center of the gas-liquid contact disc 130 as shown in Fig. Accordingly, the precipitate 20 remaining on the surface of the gas-liquid contact bell 132 is caught by the scraper 180 while being rotated, is pushed outward, falls from the edge of the gas-liquid contact bell 132, The precipitate 20 which has not been separated from the gas-liquid contact cloth 132 drops by the pressure of the liquid catalyst 10 injected from the cleaning nozzle 152 and drops.

On the inner surface of the tank 110, a precipitate dropping pipe 116 having a drop path 116a is provided. The upper end of the precipitate dropping pipe 116 is located immediately below the outer end of the scraper 180 and the lower end thereof is located below the water surface of the liquid catalyst 10 collected in the lower inner space of the tank 110. Therefore, the precipitate 20 which has been pushed by the scraper 180 and dropped at the edge of the gas-liquid contact cloth 132 falls down the water surface of the liquid catalyst 10 along the fall path 116a.

≪ Embodiment 2 >

4, a hydrogen sulfide removal device 200 having a gas-liquid contact disk according to a second embodiment of the present invention includes a tank, a gas-liquid contact disk 230, a spray nozzle 250, a cleaning nozzle 252). The tank and the injection nozzle 250 of this embodiment are the same as those of the tank 110 and the injection nozzle 250 of the first embodiment, respectively, and a description of these structures is omitted.

The gas-liquid contact disc 230 of the present embodiment is disposed above the liquid catalyst (hereinafter referred to as the reference numeral 10 in the first embodiment) collected in the lower internal space of the tank (hereinafter, referred to as reference numeral 110 in the first embodiment) And includes a frame 234 and a gas-liquid contact-type cloth 232, which are fixed to the upper internal space of the tank 110 so as to be located at the upper side.

The frame 234 is for supporting the gas-liquid contact bell 232 and includes an inner plate (not shown), a plurality of fins 234b, and an outer ring 234c. The outer ring 234c is fixed to the inner surface of the tank, and the inner plate is located at the center of the outer ring 234c. The fins 234b extend radially from the inner plate to the outer ring 234c. The gas-liquid contact boll 232 is the same as the gas-liquid contact bell 132 of the first embodiment.

The biogas introduced into the inlet pipe of the tank 110 (hereafter abbreviated as the reference numeral 112 in the first embodiment) passes through the gas-liquid contact disc 230 and rises and flows out of the liquid catalyst 10 passes through the gas-liquid contact disc 230 and drops. At this time, in the gas-liquid contact disk 230, a chemical reaction occurs while sufficiently ensuring the contact area and contact time between the biogas and the liquid catalyst 10. As a result, the hydrogen sulfide is removed and the precipitate (hereinafter, ).

Some of the precipitates 20 formed on the gas-liquid contact disc 230 fall down and remain on the surface of the gas-liquid contact disc 230, more specifically, the gas-liquid contact cloth 232. Since the precipitate 20 remaining in the gas-liquid contact bell 232 deteriorates the hydrogen sulfide removal efficiency while preventing the passage of the biogas and the passage of the liquid catalyst 10, the gas-liquid contact bell 232 needs to be continuously washed have.

The cleaning nozzle 252 is provided for the continuous cleaning of the gas-liquid contact bell 232 and is provided on the rotation pipe 242a located slightly above the gas-liquid contact bell 232. The rotary pipe 242a is fixed to the rotary shaft 242 and takes a posture extending outward from the rotary shaft 242. [ Accordingly, when the rotary shaft 242 rotates, the rotary pipe 242a and the cleaning nozzle 252 rotate along the circumferential direction of the gas-liquid contact disc 230.

The rotary shaft 242 has a lower end located above the gas-liquid contact disc 230 and has an upper end positioned above the tank 110. The rotary shaft 242 passes through a speed reducer 242 provided on the upper surface of the tank 110 and the speed reducer 242 is coupled with the motor 240. Accordingly, when the motor 240 is operated, the rotary shaft 242 rotates about an axis extending in the vertical direction (Z-axis).

The upper end of the rotating shaft 242 is rotatably coupled to the pipe 254 and the liquid catalyst 10 supplied from the pipe 254 is guided to the rotating pipe 242a inside the rotating shaft 242 A hollow (not shown) is provided. The liquid catalyst 10 supplied from the pipe 254 moves to the rotary pipe 242a along the rotary shaft 242 and is sprayed onto the upper surface of the gas-liquid contact bell 232 through the cleaning nozzle 252. [ As a result, when the operation of the motor 240 and the supply of the liquid phase catalyst 10 are performed at the same time, the injection nozzle 252 rotates along the circumferential direction of the gas-liquid contact disc 230 and continues to the upper surface of the gas- The liquid catalyst 10 is sprayed, whereby the entire area of the gas-liquid contact bell 232 is cleaned.

It is preferable that a scraper 280 is provided for cleaner cleaning of the gas-liquid contact bell 232. At this time, the scraper 280 has an inner end fixed to the rotating shaft 242, and has a lower side in contact with the upper surface of the gas-liquid contact cloth 232. Accordingly, when the rotating shaft 242 rotates, the scrapers 280 are also rotated together to scrape off the precipitate 20 on the upper surface of the gas-liquid contact cloth 132. A droplet hole 236 is provided at the edge of the gas-liquid contact disc 230. The scraped precipitate 20 drops by the scraper 280 in the drop hole 236. The precipitate 20 that has not yet fallen through the gas-liquid contact bell 232 is separated from the gas-liquid contact bell 232 by the pressure of the liquid catalyst 10 injected from the cleaning nozzle 252 and drops.

On the inner surface of the tank 110, a precipitate drop pipe 216 having a drop path 216a is provided. The upper end of the precipitate dropping pipe 216 is located immediately below the drop hole 236 and the lower end thereof is located below the surface of the liquid catalyst 10 collected in the lower inner space of the tank 110. Therefore, the precipitate 20 that has passed through the drop hole 236 falls along the falling path 216a to below the surface of the liquid catalyst 10. [

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

100, 200: hydrogen sulfide removal device 110: tank
112: inlet pipe 114: outlet pipe
116, 216: Sediment dropping pipe 130, 230: Gas-liquid contact disk
132, 232: gas-liquid contact cloth 134, 234: frame
134a: inner plate 134b, 234b:
134c, 234c: outer ring 140, 240: motor
240a: Reducer 242a: Rotary piping
142, 242: rotating shaft 150, 250: jet nozzle
152, 252: Cleaning nozzle 154, 254: Piping
180, 280: Scraper 236: Falling ball
10: liquid phase catalyst 20: precipitate

Claims (7)

A tank having an upper inner space used as a traveling path of the biogas and a lower inner space used as a collecting space of the liquid catalyst injected with the biogas;
A spray nozzle provided in an upper inner space of the tank for spraying a liquid catalyst to chemically react with the biogas;
A gas-liquid contact disk installed below the spray nozzle so as to be able to rotate only in an upper space of the tank, a biogas moving in an upper internal space of the tank, and a liquid-phase catalyst sprayed from the spray nozzle; And
And a cleaning nozzle fixed to the upper internal space of the tank so as to be positioned below the jet nozzle, the gas nozzle being provided so as to be capable of jetting the liquid catalyst onto the surface of the gas- Hydrogen sulfide removal device. The method according to claim 1,
And a scraper fixed to the upper internal space of the tank to scrape sediments as a by-product of the chemical reaction from the surface of the gas-liquid contact disc,
And the scraper has a gas-liquid contact disk provided so as to be inclined so as to guide the sediment outward from the center of the gas-liquid contact disk. The method according to claim 1,
The gas-
A frame having an inner plate to which a rotating shaft is fixed, a plurality of fits extending outwardly from the inner plate, and an outer ring fixed to an outer end of the flesh; And
And a gas-liquid contact pattern covering the frame. A tank having an upper inner space used as a traveling path of the biogas and a lower inner space used as a collecting space of the liquid catalyst injected with the biogas;
A spray nozzle provided in an upper inner space of the tank for spraying a liquid catalyst to chemically react with the biogas;
A gas-liquid contact disk fixed to be positioned only in an upper internal space of the tank and adapted to pass a biogas moving in an upper internal space of the tank and a liquid catalyst injected from the injection nozzle; And
Liquid contact disc is provided in the upper internal space of the tank so as to be able to rotate along the circumferential direction of the gas-liquid contact disc at the lower part of the injection nozzle, and the liquid- And a cleaning nozzle provided with a gas-liquid contact disc. 5. The method of claim 4,
And a scraper for scraping the precipitate, which is a by-product of the chemical reaction, from the surface of the gas-liquid contact disk,
Wherein the scraper is installed in the upper internal space of the tank so as to rotate together with the cleaning nozzle and the gas-liquid contact disk has a gas-liquid contact disk provided with a drop hole for dropping the scraped sediment by the scraper. 5. The method of claim 4,
The gas-
An outer ring fixed to an inner surface of the tank; an inner plate positioned at the center of the outer ring; and a frame having a plurality of flares extending radially from the inner plate to the outer ring; And
And a gas-liquid contact pattern covering the frame. 6. The method according to claim 2 or 5,
Wherein the inner surface of the tank has a sediment dropping pipe provided with a sediment dropping pipe for providing a fall path of sediment scraped by the scraper.

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