Novel venturi tube aeration type ammonia process tail gas washing device

Abstract

The utility model discloses a novel venturi tube aeration type ammonia process tail gas washing device which comprises a washing tower, an induced draft fan and two liquid pumps, a vertical partition plate is arranged in the washing tower and divides the lower half portion of the washing tower into two areas, namely an ammonia water solution area and a water solution area, the tower walls on the sides of the ammonia water solution area and the water solution area are respectively connected with one liquid pump, and the other liquid pump is connected with the induced draft fan. A Venturi tube aeration device is arranged at the bottom of the ammonia water solution area, an air inlet of the Venturi tube aeration device is connected with an induced draft fan outside the washing tower, a baffle is arranged above the ammonia water solution area and is higher than the partition plate, the ammonia water solution area is communicated with the upper portion of the water solution area, and corrugated packing and a spraying head are sequentially arranged above the baffle from bottom to top. The top of the washing tower is provided with an exhaust port, and two areas at the bottom are respectively connected with a drain pipe. Through two-section treatment of ammonia water solution aeration and water solution spraying, the contact area and contact time of gas and liquid are increased, tail gas is fully washed, and the ammonia removal effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically to a novel Venturi tube aeration type ammonia tail gas scrubbing device. Background Technology

[0002] In industrial production, sulfur dioxide emissions cause serious environmental pollution and require effective treatment. Traditional scrubbing towers have some shortcomings in treating exhaust gases: 1. The contact area between the gas and the scrubbing liquid is not large enough; 2. The gas flows too fast and is easily discharged directly, resulting in insufficient scrubbing and incomplete ammonia removal. Utility Model Content

[0003] This invention provides a novel Venturi tube aeration type ammonia tail gas scrubbing device, which increases the contact area and contact time between gas and liquid through a two-stage treatment of ammonia aqueous solution aeration and aqueous solution spraying, thereby thoroughly scrubbing the tail gas and improving the ammonia removal effect.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0005] A novel Venturi tube aeration type ammonia tail gas scrubbing device includes a scrubbing tower, an induced draft fan, and two liquid pumps. The scrubbing tower has a vertical baffle that divides the lower half of the tower into two areas: an ammonia solution area and an aqueous solution area. Liquid pump one is connected to the tower wall on the ammonia solution area side, and liquid pump two is connected to the tower wall on the aqueous solution area side. A Venturi tube aeration device is installed at the bottom of the ammonia solution area, and the air inlet of the Venturi tube aeration device is connected to the induced draft fan outside the scrubbing tower. A baffle is installed above the ammonia solution area, higher than the baffle, connecting the ammonia solution area and the aqueous solution area. Corrugated packing and spray heads are arranged sequentially from bottom to top above the baffle. An exhaust port is located at the top of the scrubbing tower. Drainage pipe one is connected to the bottom ammonia solution area, and drainage pipe two is connected to the bottom aqueous solution area.

[0006] Furthermore, the Venturi tube aeration device consists of an air inlet pipe, an annular pipe, and several aeration heads. Several aeration ports are evenly arranged around the center line on the annular pipe, and each aeration port is connected to an aeration head. The air inlet pipe is connected to one side of the annular pipe, and the air inlet pipe is connected to an induced draft fan.

[0007] Furthermore, the aeration head is strip-shaped, with one end pointing towards the center of the annular tube and the other end pointing towards the outer periphery of the annular tube, and several micropores are evenly distributed on the aeration head.

[0008] Furthermore, the sidewalls of the ammonia solution area and the aqueous solution area are equipped with level gauges and pH meters.

[0009] Furthermore, the first drain pipe is connected to the recycling system, and the second drain pipe is connected to the spray head via a circulation pump.

[0010] Furthermore, automatic regulating valves are provided on the first and second liquid pumps, and automatic regulating valves are provided on the first and second drain pipes.

[0011] Furthermore, the baffle is tilted downwards and toward the partition side, extending into the aqueous solution area.

[0012] Furthermore, a baffle plate is provided between the spray head and the exhaust port.

[0013] Furthermore, the top of the washing tower is arched.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. Segmented treatment: Two independent solution washing zones are designed to wash the exhaust gas in two steps. Different solutions can be used for different exhaust gas components, which improves treatment efficiency and effect and makes it highly operable.

[0016] 2. Synergistic effect of ammonia solution and aqueous solution: The aeration treatment in the ammonia solution and the spray washing of the aqueous solution work together to increase the contact area and contact time between the exhaust gas and the washing liquid, thereby achieving deep purification of the exhaust gas.

[0017] 3. Spray heads and corrugated packing enhance the treatment effect: The spray heads and corrugated packing in the aqueous solution zone ensure uniform and sufficient contact between the aqueous solution and the exhaust gas, solving the problem of incomplete local treatment and improving the uniformity and reliability of gas washing.

[0018] 4. Optimized structure facilitates gas flow: The design of the baffle and the inclined baffle above allows the exhaust gas to flow orderly between the two areas, ensuring thorough washing at each step without causing blockage or pressure loss of the exhaust gas, and the entire treatment process is stable and efficient. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 Schematic diagram of a Venturi tube aeration device

[0022] In the diagram: 1-Induced draft fan, 2-Exhaust port, 3-Venturi tube aeration device, 4-Ammonia solution, 5-Baffle plate, 6-Tower body, 7-Drain pipe one, 8-Liquid pump one, 9-Aqueous solution, 10-Spray head, 11-Corrugated packing, 12-Water baffle, 13-Baffle, 14-Air inlet pipe, 15-Annular pipe, 16-Aeration head, 17-Drain pipe two, 18-Liquid pump two. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] In the description of the embodiments of this application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in when in use, or the orientation or positional relationship that is commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0025] In the description of the embodiments of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] like Figure 1 As shown, a novel Venturi tube aeration type ammonia tail gas scrubbing device includes a scrubbing tower 6, an induced draft fan 1, a liquid pump 8, and a liquid pump 2 18. The scrubbing tower 6 is equipped with a vertical partition 5, dividing the lower half of the scrubbing tower 6 into two areas: an ammonia solution area 4 and an aqueous solution area 9. The tower wall on the side of the ammonia solution area 4 is connected to liquid pump 8, and the tower wall on the side of the aqueous solution area 9 is connected to liquid pump 2 18. Liquid pump 8 and liquid pump 2 18 pump ammonia solution and aqueous solution into the ammonia solution area 4 and the aqueous solution area 9, respectively.

[0027] The bottom of the ammonia solution zone 4 is equipped with a Venturi tube aeration device 3, such as... Figure 2As shown, the Venturi tube aeration device 3 consists of an air inlet pipe 14, an annular pipe 15, and several aeration heads 16. Several aeration ports are evenly arranged around the center line of the annular pipe 15, and each aeration port is connected to an aeration head 16. The air inlet pipe 14 is connected to one side of the annular pipe 15, and the air inlet pipe 14 is connected to the induced draft fan 1. The aeration heads 16 are strip-shaped, with one end pointing towards the center of the annular pipe 15 and the other end pointing towards the outer periphery of the annular pipe 15. Several micropores are evenly distributed on the aeration heads 16. Under the action of the induced draft fan 1, the exhaust gas enters the ammonia solution zone 4 at the bottom of the scrubbing tower 6. Under the action of the Venturi tube aeration device 3, the contact area with the ammonia solution is increased, resulting in preliminary ammonia removal treatment.

[0028] A baffle 13 is provided above the ammonia solution zone 4. The baffle 13 is inclined downwards and toward the partition 5 and extends into the aqueous solution zone 9. Figure 1 As shown, baffle 13 is higher than partition 5. Baffle 13 and vertical partition 5 do not completely enclose the ammonia solution zone 4, leaving a gap that allows the ammonia solution zone 4 and the upper part of the aqueous solution zone 9 to communicate. The exhaust gas can enter the aqueous solution zone 9 after being aerated in the ammonia solution zone 4. Baffle 13 acts as a barrier and prevents backflow, slowing down the exhaust gas flow and ensuring that water vapor in the ammonia solution zone 4 does not leak out. Above baffle 13, from bottom to top, are corrugated packing 11, spray heads 10, and baffle plates 12. Preferably, the spray heads 10 are spiral spray heads. The exhaust gas enters the aqueous solution zone 9 from the ammonia solution zone 4 and flows upwards. Under the action of the aqueous solution sprayed by the spiral spray head, ammonia is further removed. Part of the sprayed aqueous solution flows into the aqueous solution zone 9 along baffle 13. The corrugated packing 11 increases the contact area and contact time between the exhaust gas and the aqueous solution, improving the treatment effect.

[0029] The scrubbing tower 6 has an arched top with an exhaust port 2. The bottom ammonia solution zone 4 is connected to drain pipe 7, and the solution zone 9 is connected to drain pipe 17. Drain pipe 7 connects to the recovery system, and drain pipe 17 connects to spray head 10 via a circulation pump. The treated exhaust gas is discharged from the exhaust port 2, and the used ammonia solution flows into the recovery system through drain pipe 7. The solution is then circulated and sprayed through drain pipe 2, the circulation pump, and the spray head.

[0030] The side walls of the ammonia solution zone 4 and the aqueous solution zone 9 are equipped with level gauges and pH meters to monitor the ammonia concentration (ammonia is alkaline, and the pH value is related to the concentration), the level of the aqueous solution, and the pH value.

[0031] Automatic regulating valves are installed on the outlet pipes of liquid pump 1 (8) and liquid pump 2 (18), and automatic regulating valves are also installed on drain pipe 1 (7) and drain pipe 2 (17). The automatic regulating valves, level gauge, and pH meter can be electrically connected to the control system to transmit signals. When the liquid level or pH value deviates from the set range, the control system can control the automatic regulating valves to open / close for liquid replenishment and drainage operations, thus achieving automated control of the entire washing tower operation.

[0032] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A novel Venturi tube aeration type ammonia tail gas scrubbing device, characterized in that: The system includes a scrubbing tower (6), an induced draft fan (1), a liquid pump one (8), and a liquid pump two (18). The scrubbing tower (6) is equipped with a vertical partition (5) that divides the lower half of the scrubbing tower (6) into two areas: an ammonia solution area (4) and an aqueous solution area (9). The tower wall on the side of the ammonia solution area (4) is connected to liquid pump one (8), and the tower wall on the side of the aqueous solution area (9) is connected to liquid pump two (18). A Venturi tube aeration device (3) is installed at the bottom of the ammonia solution area (4). The air inlet is connected to the induced draft fan (1) outside the scrubbing tower (6). A baffle (13) is provided above the ammonia solution zone (4). The baffle (13) is higher than the partition (5). The ammonia solution zone (4) and the aqueous solution zone (9) are connected above each other. Corrugated packing (11) and spray head (10) are provided above the baffle (13) from bottom to top. An exhaust port (2) is provided at the top of the scrubbing tower (6). The bottom ammonia solution zone (4) is connected to drain pipe one (7), and the aqueous solution zone (9) is connected to drain pipe two (17).

2. The novel Venturi tube aeration type ammonia tail gas scrubbing device according to claim 1, characterized in that: The Venturi tube aeration device (3) consists of an air inlet pipe (14), an annular pipe (15) and several aeration heads (16). Several aeration ports are evenly arranged around the center line on the annular pipe (15), and each aeration port is connected to an aeration head (16). The air inlet pipe (14) is connected to one side of the annular pipe (15), and the air inlet pipe (14) is connected to the blower (1).

3. The novel Venturi tube aeration type ammonia tail gas scrubbing device according to claim 2, characterized in that: The aeration head (16) is strip-shaped, with one end pointing to the center of the annular tube (15) and the other end pointing to the outer periphery of the annular tube (15). Several micropores are evenly distributed on the aeration head (16).

4. The novel Venturi tube aeration type ammonia tail gas scrubbing device according to claim 1, characterized in that: The side walls of the ammonia solution area (4) and the aqueous solution area (9) are equipped with level gauges and pH meters.

5. The novel Venturi tube aeration type ammonia tail gas scrubbing device according to claim 1, characterized in that: The first drain pipe (7) is connected to the recycling system, and the second drain pipe (17) is connected to the spray head (10) through a circulation pump.

6. The novel Venturi tube aeration type ammonia tail gas scrubbing device according to claim 1, characterized in that: Automatic regulating valves are provided on the outlet pipes of the first liquid pump (8) and the second liquid pump (18), and automatic regulating valves are provided on the first drain pipe (7) and the second drain pipe (17).

7. The novel Venturi tube aeration type ammonia tail gas scrubbing device according to claim 1, characterized in that: The baffle (13) is inclined downward and toward the partition (5) side, extending into the aqueous solution area (9).

8. The novel Venturi tube aeration type ammonia tail gas scrubbing device according to claim 1, characterized in that: A baffle plate (12) is provided between the spray head (10) and the exhaust port (2).

9. The novel Venturi tube aeration type ammonia tail gas scrubbing device according to claim 1, characterized in that: The top of the washing tower (6) is arched.

10. The novel Venturi tube aeration type ammonia tail gas scrubbing device according to claim 1, characterized in that: The spray head (10) is a spiral spray head.

Images