Smoke exhaust device for treating ship tail gas

Abstract

The utility model relates to the technical field of tail gas treatment, in particular to a smoke exhaust device for treating ship tail gas, which comprises a dust removal box, a smoke exhaust pipe, a smoke exhaust pipe and a smoke exhaust pipe, a denitration chamber and a spraying support are arranged in the tail gas purification tower from top to bottom, an atomization nozzle is arranged on the spraying support, and the atomization nozzle pumps seawater through an external water pump to conduct spraying treatment on tail gas; a gas outlet of the dust removal box is communicated with a gas inlet of the tail gas purification tower, a tail gas discharge port is formed in the top of the tail gas purification tower, a waste liquid discharge port is formed in the bottom of the tail gas purification tower, and the waste liquid discharge port is communicated with the aeration tank. The tail gas treatment device has the beneficial effects that compared with a traditional spraying structure, the tail gas treatment device can effectively ensure that tail gas can be fully mixed with seawater, so that the absorption efficiency of the seawater on sulfur dioxide in the tail gas is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to a smoke exhaust device for treating ship tail gas. Background Art

[0002] SOx (mainly SO2 and SO3) emissions are one of the main causes of air pollution. In order to save costs, ships mostly use high-sulfur fuel oil, which produces a large amount of SOx during the navigation process, aggravating air pollution. With the continuous increase in the number of ships in the world, the exhaust gas generated by ships during navigation is gradually increasing. If these exhaust gases are not treated, they will cause increasingly serious environmental and ecological problems, especially the sulfur-containing exhaust gas emitted during the combustion of high-sulfur fuel. The problem of ship exhaust pollution is becoming increasingly prominent. In order to achieve the standard emission of ship exhaust gas, the ship exhaust gas must be desulfurized.

[0003] However, the existing ship exhaust purification devices usually only capture larger particles in the exhaust gas, but cannot purify harmful gases such as sulfur dioxide in the exhaust gas, resulting in the inability to treat the exhaust gas more thoroughly. Utility Model Content

[0004] The purpose of the utility model is to provide a smoke exhaust device for treating ship exhaust gas, so as to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, a smoke exhaust device for treating ship exhaust gas is provided, comprising:

[0006] A dust removal box, which performs dust removal treatment on incoming ship exhaust gas, and the interior of the dust removal box is separated into a dilution chamber and a dust removal chamber by a partition plate;

[0007] An exhaust gas purification tower, wherein a denitration chamber and a spray bracket are arranged from top to bottom inside the exhaust gas purification tower, and an atomizing nozzle is arranged on the spray bracket, and the atomizing nozzle draws seawater through an external water pump to spray the exhaust gas;

[0008] The air outlet of the dust removal box is connected to the air inlet of the tail gas purification tower. The top of the tail gas purification tower is provided with a tail gas discharge port, and the bottom of the tail gas purification tower is provided with a waste liquid discharge port, and the waste liquid discharge port is connected to the aeration tank.

[0009] Furthermore, the dust removal chamber is filled with fillers, which include polyhedral balls and activated carbon, and the polyhedral balls are specifically made of polypropylene plastic.

[0010] Furthermore, a dilution pool is provided in the dilution chamber, and a smoke exhaust pipe is provided at the outlet of the dust removal chamber, and the exhaust gas after the dust removal treatment enters the dilution pool through the smoke exhaust pipe for dilution.

[0011] Furthermore, the spray bracket is composed of two layers of combined plates, the upper and lower layers are connected by an outer ring, and the outer wall of the outer ring is completely in contact with the inner wall of the exhaust gas purification tower.

[0012] Furthermore, the denitrification chamber includes a denitrification tank, which is coaxially arranged with the exhaust gas purification tower through a fixed plate, an outer wall of the denitrification tank is spirally wound with a heating wire, a filter is arranged inside the denitrification tank, and a denitrification catalyst is coated on the filter.

[0013] Furthermore, the combined plate is composed of a plurality of inclined plates, the inclined angle of the inclined plates is 45°, and the atomizing nozzle is arranged between the angles of any two adjacent inclined plates.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. Since the combined plate is composed of several inclined plates with an inclination angle of 45°, and since the atomizing nozzle is located at the angle, the exhaust gas of the ship is blocked by the combined plate during its ascent, and there is an opening for the exhaust gas to pass through at the connection point where the atomizing nozzle is set. Compared with the traditional spray structure, it can effectively ensure that the exhaust gas can be fully mixed with seawater, thereby improving the absorption efficiency of seawater for sulfur dioxide in the exhaust gas;

[0016] 2. By setting up a denitrification chamber in the exhaust gas purification tower, the exhaust gas can be denitrated. When the exhaust gas passes through the filter, it will come into contact with the denitrification catalyst coated on the filter, accelerating the denitrification process. Not only that, setting an electric heating wire on the denitrification tank will further accelerate the denitrification process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural sectional view of the utility model;

[0018] Figure 2 It is an exploded view of the internal structure of the utility model.

[0019] The meaning of each number in the figure is:

[0020] 1. Dust removal box; 2. Dilution chamber; 3. Dust removal chamber; 4. Exhaust purification tower; 5. Denitration chamber; 501. Denitration tank; 502. Heating wire; 503. Filter; 6. Spray bracket; 601. Combination plate; 602. Outer ring; 7. Exhaust discharge port; 8. Waste liquid discharge port; 9. Aeration tank; 10. Atomizing nozzle. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0023] See also Figure 1-Figure 2 As shown, a smoke exhaust device for treating ship exhaust gas is provided, comprising:

[0024] A dust removal box 1, wherein the dust removal box 1 performs dust removal treatment on the incoming ship exhaust gas. The interior of the dust removal box 1 is separated into a dilution chamber 2 and a dust removal chamber 3 by a partition plate. The exhaust gas discharged from the ship will first pass through the dust removal chamber 3 for dust removal treatment, and the exhaust gas after dust removal will enter the dilution chamber 2. The dilution chamber 2 is provided with a diluent for diluting sulfur monoxide, carbon monoxide or nitrogen oxides. The diluted exhaust gas is then discharged into the exhaust gas purification tower 4, which is conducive to improving the purification efficiency;

[0025] A tail gas purification tower 4, wherein a denitration chamber 5 and a spray bracket 6 are arranged from top to bottom inside the tail gas purification tower 4, and an atomizing nozzle 10 is arranged on the spray bracket 6, and the atomizing nozzle 10 draws seawater through an external water pump to spray the tail gas;

[0026] The air outlet of the dust removal box 1 is connected to the air inlet of the tail gas purification tower 4. The top of the tail gas purification tower 4 is provided with a tail gas discharge port 7, and the bottom thereof is provided with a waste liquid discharge port 8. The waste liquid discharge port 8 is connected to the aeration tank 9. The waste liquid discharged from the waste liquid discharge port 8 is an acidic liquid. After entering the aeration tank 9, due to the presence of a large number of carbonate ions in the seawater, it will react with hydrogen ions to generate carbon dioxide and water, thereby offsetting the acidification caused by sulfur dioxide, so that the pH value of the seawater returns to normal and meets the discharge standard;

[0027] The dust removal chamber 3 is filled with fillers, which include polyhedral balls and activated carbon. The polyhedral balls are specifically made of polypropylene plastic. The polyhedral balls made of polypropylene plastic have multiple faces, so they can greatly increase the contact area with the ship's exhaust gas, thereby absorbing particulate matter in the exhaust gas;

[0028] The dilution chamber 2 is provided with a dilution pool, and the outlet of the dust removal chamber 3 is provided with a smoke exhaust pipe, and the exhaust gas after the dust removal process enters the dilution pool through the smoke exhaust pipe for dilution.

[0029] like Figure 1 and Figure 2 As shown:

[0030] The spray bracket 6 is composed of two layers of combined plates 601, which are connected by an outer ring 602. The outer wall of the outer ring is completely in contact with the inner wall of the tail gas purification tower 4.

[0031] The combined plate 601 is composed of several inclined plates, the inclined angle of the inclined plates is 45°, and the atomizing nozzle 10 is arranged between the angles of any two adjacent inclined plates;

[0032] It is worth noting that the exhaust gas of the ship is blocked by the combined plate 601 during its rising process, while there is an opening for the exhaust gas to pass through at the connection point where the atomizing nozzle 10 is set. Compared with the traditional spray structure, it can effectively ensure that the exhaust gas can be fully mixed with seawater, thereby improving the absorption efficiency of seawater for sulfur dioxide in the exhaust gas, and reacting with oxygen to generate sulfate ions and hydrogen ions.

[0033] like Figure 1 As shown:

[0034] The denitration chamber 5 includes a denitration tank 501, which is coaxially arranged with the exhaust gas purification tower 4 through a fixed plate. The outer wall of the denitration tank 501 is spirally wound with a heating wire 502. A filter screen 503 is arranged inside the denitration tank 501, and a denitration catalyst is coated on the filter screen 503. The internal temperature of the denitration tank 501 can be heated by the heating wire 502 to improve the reaction efficiency of the denitration catalyst on the filter screen 503.

[0035] Working process:

[0036] After the sulfur- and nitrate-containing exhaust gas of the ship enters the dust removal box 1, the large particles in the exhaust gas are filtered and intercepted by the multi-faceted balls and activated carbon arranged in the dust removal chamber 2. In order to improve the practicality of the device, the multi-faceted balls and activated carbon in the dust removal chamber 2 can be disassembled, and the disassembled multi-faceted balls and activated carbon can still be used after being cleaned;

[0037] The tail gas after dust removal enters the dilution tank through the smoke exhaust pipe for dilution, and then the diluted tail gas enters the tail gas purification tower 4. At this time, seawater is sprayed on the diluted tail gas through the atomizing nozzle 10. The atomized seawater will mix with the tail gas, thereby absorbing sulfur dioxide in the tail gas and reacting with oxygen to generate sulfate ions and hydrogen ions. At this time, the seawater will be acidic. The acidic seawater enters the aeration tank 9 through the waste liquid discharge port 8, and the sulfate ions in the acidic seawater will react with hydrogen ions in the aeration tank 9 to generate carbon dioxide and water, thereby offsetting the acidification caused by sulfur dioxide, so that the pH value of the seawater returns to normal and meets the discharge standard;

[0038] The exhaust gas treated with seawater further rises and then enters the denitration chamber 5. When passing through the filter 503, the exhaust gas will come into contact with the denitration catalyst coated on the filter 503, thereby accelerating the denitration process. Moreover, the heating wire 502 provided on the denitration tank 501 will further accelerate the denitration process. Finally, the exhaust gas is discharged through the exhaust gas outlet 7.

[0039] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A smoke exhaust device for treating ship exhaust gas, characterized in that: include: A dust removal box (1), the dust removal box (1) performs dust removal treatment on incoming ship exhaust gas, the interior of the dust removal box (1) being separated into a dilution chamber (2) and a dust removal chamber (3) by a separation plate; A tail gas purification tower (4), wherein a denitration chamber (5) and a spray bracket (6) are arranged from top to bottom inside the tail gas purification tower (4), and an atomizing nozzle (10) is arranged on the spray bracket (6), and the atomizing nozzle (10) draws seawater through an external water pump to spray the tail gas; The air outlet of the dust removal box (1) is connected to the air inlet of the exhaust gas purification tower (4), the top of the exhaust gas purification tower (4) is provided with an exhaust gas discharge port (7), and the bottom of the exhaust gas purification tower (4) is provided with a waste liquid discharge port (8), and the waste liquid discharge port (8) is connected to the aeration tank (9).

2. A smoke exhaust device for treating ship exhaust gas according to claim 1, characterized in that: The dust removal chamber (3) is filled with fillers, which include polyhedral balls and activated carbon. The polyhedral balls are specifically made of polypropylene plastic.

3. A smoke exhaust device for treating ship exhaust gas according to claim 2, characterized in that: A dilution pool is provided in the dilution chamber (2), and a smoke exhaust pipe is provided at the outlet of the dust removal chamber (3), and the exhaust gas after the dust removal process enters the dilution pool through the smoke exhaust pipe for dilution.

4. A smoke exhaust device for treating ship exhaust gas according to claim 3, characterized in that: The spray support (6) is composed of two layers of combined plates (601), the upper and lower layers being connected via an outer ring (602), and the outer wall of the outer ring is completely in contact with the inner wall of the tail gas purification tower (4).

5. A smoke exhaust device for treating ship exhaust gas according to claim 4, characterized in that: The denitration chamber (5) comprises a denitration tank (501), the denitration tank (501) is coaxially arranged with the tail gas purification tower (4) via a fixing plate, an electric heating wire (502) is spirally wound around the outer wall of the denitration tank (501), a filter screen (503) is arranged inside the denitration tank (501), and a denitration catalyst is coated on the filter screen (503).

6. A smoke exhaust device for treating ship exhaust gas according to claim 5, characterized in that: The combined plate (601) is composed of a plurality of inclined plates, the inclined angle of the inclined plates is 45°, and the atomizing nozzle (10) is arranged between the angles of any two adjacent inclined plates.

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