Spraying device for neutralizing acid gas

Abstract

The utility model discloses a spraying device for neutralizing acid gas, and belongs to the field of spraying equipment. Comprising a spray tower, the spray tower is communicated and connected with a buffer tank through an overflow pipe, a pH sensor is arranged on the buffer tank, and a liquid pump is arranged outside the buffer tank. A liquid inlet of the liquid pump is communicated and connected with the inner cavity of the buffer tank through a liquid inlet pipe, and a liquid outlet of the liquid pump is communicated and connected with a spraying device in the spraying tower through a liquid outlet pipe. A first three-way valve is connected to the liquid discharging pipe in series, and one outlet of the first three-way valve is connected with a flow dividing pipe in a penetrating mode. According to the device, acid gas exhausted from the interior of a workshop can be neutralized and exhausted after being neutralized, so that the effect of protecting the environment is achieved.

Description

Technical Field

[0001] The present application belongs to the field of spraying equipment, and specifically relates to a spraying device for neutralizing acidic gases. Background Art

[0002] During the magnesium alloy production and melting process, solvents are added to the crucible. The solvent's primary functions are to remove impurities, protect the melt from oxidation, and promote grain refinement. The solvent typically contains chlorides, which decompose at high temperatures into hydrogen chloride gas, an irritating, acidic gas. This acidic gas can spread into the melting shop, corroding the building and equipment, reducing their service life and creating numerous safety hazards.

[0003] Currently, smelting workshops are equipped with ventilation devices on the roof to improve air circulation within the smelting workshop and reduce the corrosion of internal buildings and equipment. However, this method directly releases acidic gases into the outside air, which has an impact on the environment. Utility Model Content

[0004] The technical problem to be solved by the present application is: to overcome the deficiencies of the prior art and provide a spray device for neutralizing acidic gases. The present application can neutralize the acidic gases discharged from the interior of the workshop and then exhaust them after neutralization, thereby protecting the environment.

[0005] The technical solution adopted by this application to solve the existing problems is:

[0006] A spray device for neutralizing acidic gas comprises a spray tower which is connected to a buffer tank via an overflow pipe. The buffer tank is provided with a pH sensor and a liquid pump is provided outside the buffer tank.

[0007] The liquid inlet of the liquid pump is connected to the inner cavity of the buffer tank through the liquid inlet pipe, and the liquid discharge port of the liquid pump is connected to the spray device inside the spray tower through the liquid discharge pipe.

[0008] The liquid discharge pipe is connected in series with a first three-way valve, and one outlet of the first three-way valve is connected through a diversion pipe.

[0009] Preferably, a second three-way valve is connected in series to the drainage pipe, and an inlet of the second three-way valve is connected to a fluid infusion pipe.

[0010] Preferably, the first three-way valve and the second three-way valve are both electrically controlled valves.

[0011] Preferably, the spray tower comprises a tower body with an open upper end, and a cover is provided on the upper end of the tower body.

[0012] Preferably, the air inlet pipe is arranged on the tower body, the air inlet pipe is lower than the overflow pipe, and the top of the cover is penetrated by an exhaust pipe.

[0013] Preferably, a nozzle is provided inside the tower body, a plurality of nozzle holes are provided on the circular axis surface of the nozzle, and the nozzle is connected to the air inlet pipe.

[0014] Preferably, the spray holes are arc-shaped, and a plurality of spray holes are distributed in a ring array around the axis of the spray head.

[0015] Preferably, the spray device includes an outer ring tube and several straight tubes arranged at intervals in the middle of the ring tube. The two ends of the straight tubes are connected to the ring tube. A distribution pipe is provided above the straight tube. The end of the distribution pipe is connected to the end of the drainage pipe. The distribution pipe is connected to each straight tube through a branch pipe.

[0016] Preferably, a supporting device is provided inside the spray tower, and the spray device is fixedly connected to the spray tower via the supporting device.

[0017] Preferably, the support device includes a support ring and a clamping frame fixedly connected to the inner side of the support ring, the support ring is connected to the tower body, and the ring tube is clamped to the clamping frame.

[0018] Compared with the prior art, this application has the following beneficial effects:

[0019] (1) The alkaline solution is separated from the waste gas by spraying, so that the alkaline solution reacts with the acidic gas in the waste gas to neutralize it, and the waste gas is purified to meet the emission standards.

[0020] (2) The spraying device includes an outer ring pipe and multiple straight pipes arranged at intervals on the inner side, which increases the spraying area and optimizes the exhaust gas treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present application is further described below with reference to the accompanying drawings and examples.

[0022] Figure 1 This is a structural diagram of a spray device for neutralizing acidic gas.

[0023] Figure 2 This is a cross-sectional view of a spray device for neutralizing acidic gas in this application.

[0024] Figure 3 This is a cross-sectional view of a nozzle in a spray device for neutralizing acidic gas in this application.

[0025] Figure 4 for Figure 3 A top view of

[0026] Figure 5This is a structural diagram of a spray device for neutralizing acidic gas in this application.

[0027] Figure 6 This is a structural diagram of a support device in a spray device for neutralizing acidic gas in this application.

[0028] In the figure: 1-spray tower, 101-tower body, 102-cover, 2-air inlet pipe, 3-spray head, 301-spray hole, 4-exhaust pipe, 5-spray device, 501-ring pipe, 502-straight pipe, 503-distribution pipe, 6-support device, 601-support ring, 602-clamping frame, 7-overflow pipe, 8-buffer tank, 9-liquid pump, 10-liquid inlet pipe, 11-liquid discharge pipe, 12-first three-way valve, 13-diverter pipe, 14-second three-way valve, 15-liquid supply pipe, 16-pH sensor. DETAILED DESCRIPTION

[0029] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of the components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0030] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present application.

[0031] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0032] The accompanying drawings show a preferred embodiment of the spray device for neutralizing acidic gas. The present application will be further described in detail below with reference to the accompanying drawings.

[0033] A spray device for neutralizing acidic gas, comprising Figure 1 as well as Figure 2 As shown, it includes a spray tower 1, which is connected to a buffer tank 8 through an overflow pipe 7. The buffer tank 8 is provided with a pH sensor 16, and a liquid pump 9 is provided outside the buffer tank 8.

[0034] The liquid inlet of the liquid pump 9 is connected to the inner cavity of the buffer tank 8 through the liquid inlet pipe 10 , and the liquid discharge port of the liquid pump 9 is connected to the spray device 5 inside the spray tower 1 through the liquid discharge pipe 11 .

[0035] The liquid discharge pipe 11 is connected in series with a first three-way valve 12 , and one outlet of the first three-way valve 12 is connected to a diversion pipe 13 .

[0036] The drainage pipe 11 is connected in series with a second three-way valve 14 , and one inlet of the second three-way valve 14 is connected to a liquid infusion pipe 15 .

[0037] The first three-way valve 12 and the second three-way valve 14 are both electrically controlled valves. An electrical control box is provided outside the spray tower 1, and a PLC electrical control unit is provided inside the electrical control box. The first three-way valve 12, the second three-way valve 14, the liquid pump 9, and the pH sensor 16 are all electrically connected to the PLC electrical control unit.

[0038] Exhaust gas extracted from the smelting workshop enters spray tower 1. Spray device 5 sprays an alkaline solution downward, reacting with and neutralizing the acid gases contained in the exhaust gas. The treated exhaust gas is free of acid gases and can be discharged directly into the atmosphere. The alkaline solution, after reacting with the acid gases, accumulates as a liquid at the bottom of spray tower 1. Once the liquid level rises above overflow pipe 7, it is discharged through drainage pipe 7 into buffer tank 8.

[0039] A pH sensor 16 installed in the buffer tank 8 monitors the pH of the solution. Based on the test results, the PLC electronic control unit adjusts the opening path of the first three-way valve 12 and the second three-way valve 14. If the pH value is greater than 7, the liquid pump 9 re-pumps the solution in the buffer tank 8 into the spray device 5 for reuse. If the pH value is 7 or less, the solution in the buffer tank 8 is discharged through the shunt pipe 13, and a new alkaline solution is pumped into the spray device 5 through the refill pipe 15.

[0040] Because the acidic gas in the waste gas is primarily composed of hydrogen chloride, in this embodiment, a sodium hydroxide solution is used as the alkaline solution, which reacts to produce sodium chloride and water. Therefore, the solution discharged from the diversion pipe 13 is a sodium chloride solution, which can be sold as an industrial by-product, reducing the cost of waste gas treatment and improving economic benefits.

[0041] The spray tower 1 comprises a tower body 101 with an open top. A cover 102 covers the top of the tower body 101. An air inlet pipe 2 is mounted on the tower body 101. An exhaust pipe 4 extends through the top of the cover 102. To prolong the reaction time between the hydrogen chloride gas and the sodium hydroxide solution, in this embodiment, the exhaust gas inlet pipe 2 is positioned below the overflow pipe 7. This allows the incoming exhaust gas to be below the liquid level and directly injected into the sodium hydroxide solution.

[0042] To improve reaction efficiency, a nozzle 3 is provided inside the tower body 101. A plurality of nozzle holes 301 are provided on the circular axial surface of the nozzle head 3. The nozzle head 3 is connected to the air inlet pipe 2. The nozzle holes 301 are arc-shaped and are distributed in a circular array around the axis of the nozzle head 3.

[0043] In this way, the gas ejected through the nozzle hole 301 is in a spiral shape, which has a stirring effect on the sodium hydroxide solution, thereby optimizing the reaction efficiency of the sodium hydroxide and hydrogen chloride.

[0044] To increase the spray coverage, the spray device 5 includes an outer annular tube 501 and several straight tubes 502 spaced apart in the middle of the annular tube 501. Spray holes are located at the bottom of the annular tube 501 and the straight tubes 502. Both ends of the straight tubes 502 are connected to the annular tube 501. A distribution tube 503 is located above the straight tubes 502. The end of the distribution tube 503 is connected to the end of the drain pipe 11. The distribution tube 503 is connected to each straight tube 502 via branch pipes.

[0045] A supporting device 6 is provided inside the spray tower 1 , and the spray device 5 is fixedly connected to the spray tower 1 via the supporting device 6 .

[0046] The support device 6 includes a support ring 601 and a clamping frame 602 fixedly connected to the inner side of the support ring 601. The support ring 601 is connected to the tower body 101. In this embodiment, the top surface of the tower body 101 is concavely provided with an annular groove, and the support ring 601 is clamped inside the annular groove. The annular tube 501 is clamped to the clamping frame 602.

[0047] The above describes the implementation methods of the present application in detail in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. A spray device for neutralizing acidic gas, characterized in that: The invention comprises a spray tower (1), wherein the spray tower (1) is connected to a buffer tank (8) via an overflow pipe (7), a pH sensor (16) is provided on the buffer tank (8), and a liquid pump (9) is provided outside the buffer tank (8); The liquid inlet of the liquid pump (9) is connected to the inner cavity of the buffer tank (8) through the liquid inlet pipe (10), and the liquid discharge port of the liquid pump (9) is connected to the spray device (5) inside the spray tower (1) through the liquid discharge pipe (11); The liquid discharge pipe (11) is connected in series with a first three-way valve (12), and one outlet of the first three-way valve (12) is connected through a diversion pipe (13).

2. The spray device for neutralizing acidic gas according to claim 1, characterized in that: The liquid discharge pipe (11) is connected in series with a second three-way valve (14), and one inlet of the second three-way valve (14) is connected to a liquid infusion pipe (15).

3. The spray device for neutralizing acidic gas according to claim 2, characterized in that: The first three-way valve (12) and the second three-way valve (14) are both electrically controlled valves.

4. A spray device for neutralizing acidic gas according to claim 1, 2 or 3, characterized in that: The spray tower (1) comprises a tower body (101) with an open upper end, and a cover (102) is provided on the upper end of the tower body (101).

5. The spray device for neutralizing acidic gas according to claim 4, characterized in that: The air inlet pipe (2) is arranged on the tower body (101), the air inlet pipe (2) is lower than the overflow pipe (7), and the top of the cover (102) is penetrated by an exhaust pipe (4).

6. The spray device for neutralizing acidic gas according to claim 5, characterized in that: A nozzle (3) is provided inside the tower body (101), a plurality of nozzle holes (301) are provided on the circular axis surface of the nozzle head (3), and the nozzle head (3) is connected to the air inlet pipe (2).

7. The spray device for neutralizing acidic gas according to claim 6, characterized in that: The spray holes (301) are arc-shaped, and a plurality of spray holes (301) are distributed in a ring array around the axis of the spray head (3).

8. The spray device for neutralizing acidic gas according to claim 1, 2, 3, 5, 6 or 7, characterized in that: The spray device (5) comprises an outer ring tube (501) and a plurality of straight tubes (502) arranged at intervals in the middle of the ring tube (501). Both ends of the straight tubes (502) are connected to the ring tube (501). A distribution tube (503) is provided above the straight tube (502). The end of the distribution tube (503) is connected to the end of the liquid discharge tube (11). The distribution tube (503) is connected to each straight tube (502) through a branch tube.

9. The spray device for neutralizing acidic gas according to claim 8, characterized in that: A supporting device (6) is provided inside the spray tower (1), and the spray device (5) is fixedly connected to the spray tower (1) via the supporting device (6).

10. The spray device for neutralizing acidic gas according to claim 9, characterized in that: The support device (6) comprises a support ring (601) and a clamping frame (602) fixedly connected to the inner side of the support ring (601); the support ring (601) is connected to the tower body (101); and the ring tube (501) is clamped to the clamping frame (602).

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