Bubbling type lead-containing waste gas treatment device

Abstract

The utility model discloses a bubbling type lead-containing waste gas treatment device, relates to the technical field of waste gas treatment devices, and solves the technical problem of poorer absorption effect of lead in waste gas caused by insufficient gas-liquid contact in the existing chemical absorption method. Comprising a shell, a waste gas inlet assembly is arranged on the lower portion in the shell, an absorbent solution is contained in the shell, a waste gas outlet is formed in the top of the shell, the waste gas inlet assembly comprises a waste gas inlet header pipe and a plurality of waste gas inlet branch pipes, and the waste gas inlet header pipe and the waste gas inlet branch pipes are communicated with each other. The exhaust gas inlet branch pipes are symmetrically arranged on the two sides of the exhaust gas inlet main pipe, and a plurality of gas spraying holes are formed in the exhaust gas inlet branch pipes; by uniformly generating a large number of bubbles, lead and compounds thereof in waste gas are dissolved in liquid films on the surfaces of the bubbles and fully react with adsorbents in the liquid films, the lead removal efficiency is high, and the lead removal effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas treatment device technical field, concretely relates to a bubble type lead-containing waste gas treatment device. BACKGROUND

[0002] Chemical and nuclear power waste gas usually contains lead. The emission of lead is harmful to human body, and after entering the human body, a small part of lead will be discharged out of the body with the body metabolism, and the rest will be deposited in the body. The accumulation of lead in the body can harm the human nervous system and cause mental decline. Lead can also interfere with the function of red blood cells to send oxygen, damage the human hematopoietic function, cause anemia and poison the human digestive system, causing abdominal pain, constipation, loss of appetite, etc. Therefore, the state standard has strict regulations on the emission of lead. Only by accurately testing the emission of lead can better monitoring and management be carried out.

[0003] Lead in lead-containing waste gas exists in the form of dust particles and smoke. For dust particles with large particle size (1-200 μm), a bag-type dust collector can be used to remove them. For lead with small particle size (0.01-1 μm), electrostatic precipitation or chemical absorption method can be used.

[0004] In the prior art, acetic acid solution or sodium hydroxide solution is usually used as an absorbent to absorb and treat lead in lead-containing waste gas. However, due to insufficient gas-liquid contact, the treatment effect is poor, and lead in waste gas cannot be effectively removed. UTILITY MODEL CONTENT

[0005] The utility model is to solve the technical problem of the existing chemical absorption method that the gas-liquid contact is not sufficient, leading to poor absorption effect of lead in waste gas. The purpose is to provide a bubble type lead-containing waste gas treatment device. A large number of bubbles are uniformly generated to dissolve lead and its compounds in the liquid film on the surface of the bubbles, and the adsorbent in the liquid film is fully reacted, so that the lead removal efficiency is high and the effect is good.

[0006] The utility model is realized by the following technical scheme:

[0007] A bubble type lead-containing waste gas treatment device, comprising a shell, a waste gas inlet assembly arranged at the lower part in the shell, an absorbent solution contained in the shell, and a waste gas outlet arranged at the top of the shell.

[0008] The waste gas inlet assembly comprises a waste gas inlet main pipe and a waste gas inlet branch pipe which are in communication with each other. The waste gas inlet branch pipe is arranged symmetrically on both sides of the waste gas inlet main pipe, and a plurality of jet holes are formed on the waste gas inlet branch pipe.

[0009] Further, a liquid level meter is installed on the shell to detect the liquid level of the absorbent solvent in the shell.

[0010] Further, the upper part of the liquid level meter is connected with the shell through a liquid level meter upper part interface, and the lower part of the liquid level meter is connected with the shell through a liquid level meter lower part interface.

[0011] Further, the length of the exhaust gas inlet branch pipe close to the central axis of the shell is greater than the length of the exhaust gas inlet branch pipe away from the central axis of the shell.

[0012] Further, the ratio of the flow area of the exhaust gas inlet manifold to the total flow area of the exhaust gas inlet branch pipes is between 0.8 and 1.2.

[0013] Further, the jet hole is a circular hole.

[0014] Further, the diameter of the jet hole is between 2mm and 10mm.

[0015] Further, the inner top of the shell is further provided with a wire mesh demister.

[0016] Further, the top of the shell is provided with an absorbent charging port, and the top of the shell is provided with a fresh liquid charging port.

[0017] Further, the bottom of the shell is provided with a waste residue and waste liquid discharge port.

[0018] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0019] 1. In use, the lead-containing exhaust gas is introduced into the exhaust gas inlet branch pipe from the exhaust gas inlet manifold, and then is sprayed into the adsorbent in the shell from the jet hole of the exhaust gas inlet branch pipe, a large number of bubbles are uniformly generated, a large gas-liquid contact area is generated by a large number of bubbles, the gas-liquid contact capacity is strengthened by continuous generation and rupture of the bubbles, thereby a new contact area is continuously generated, the exhaust gas treatment device becomes a very efficient multi-stage gas-liquid contactor, the lead and its compounds in the exhaust gas are dissolved in the liquid film on the surface of the bubbles and fully react with the adsorbent in the liquid film, and the insoluble solid particles in the exhaust gas are also removed after contacting the liquid film, so that the lead removal efficiency is high and the effect is good.

[0020] 2. The amount of the absorbent solution in the shell can be monitored by the liquid level meter, so that the mass fraction of the absorbent in the shell is maintained within an effective range, thereby ensuring the lead removal effect.

[0021] 3. The length of the exhaust gas inlet branch pipe close to the central axis of the shell is greater than the length of the exhaust gas inlet branch pipe away from the central axis of the shell, so that the exhaust gas inlet branch pipes are uniformly distributed in the shell, the jet holes arranged thereon are uniformly distributed, the gas-liquid contact uniformity is improved, and the lead removal effect of the absorbent is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and together with the description serve to explain the principles of the present application. In the drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0024] Figure 2 It is a schematic diagram of the structure of the exhaust gas intake assembly;

[0025] Figure 3 It is Figure 2 It is an enlarged view of the A part in the middle;

[0026] Figure 4 It is a top view of the present application.

[0027] Markings in the drawings and corresponding component names:

[0028] 1 - shell, 2 - absorbent charging port, 3 - fresh liquid charging port, 4 - exhaust gas discharge port, 5 - wire mesh demister, 6 - liquid level meter, 601 - upper interface of liquid level meter, 602 - lower interface of liquid level meter, 7 - waste residue and waste liquid discharge port, 8 - exhaust gas intake assembly, 801 - exhaust gas intake main pipe, 802 - exhaust gas intake branch pipe, 803 - jet hole. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present application more clear, specific embodiments and the accompanying drawings will be further described in detail, the schematic embodiment of the present application and its description are only used to explain the present application, and not as a limitation of the present application.

[0030] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, it is apparent to those skilled in the art that the present application can be practiced without these specific details. In other embodiments, well-known structures, circuits, materials or methods are not specifically described in order to avoid obscuring the present application.

[0031] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] In the description of this utility model, 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 component 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.

[0033] Meanwhile, the terms "set up," "assemble," "connect," and "link" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Example

[0035] This embodiment provides a bubble-type lead-containing waste gas treatment device, such as... Figures 1-4 As shown, the device includes a housing 1, an exhaust gas inlet assembly 8 disposed in the lower part of the housing 1, an absorbent solution disposed inside the housing 1, and an exhaust gas outlet 4 disposed at the top of the housing 1.

[0036] The exhaust gas intake assembly 8 includes an exhaust gas intake main pipe 801 and exhaust gas intake branch pipes 802 that are interconnected. Multiple exhaust gas intake branch pipes 802 are provided and are symmetrically arranged on both sides of the exhaust gas intake main pipe 801. Several jet holes 803 are opened on the exhaust gas intake branch pipes 802.

[0037] The absorbent solution in this waste gas treatment device is an acetic acid solution with a mass fraction of 0.3% to 10% or a sodium hydroxide solution with a mass fraction of 0.3% to 10%, and its reaction equation is as follows:

[0038] The reaction equation is:

[0039] Pb + 2CH3COOH → Pb(CH3COO)2↓ + H2

[0040] PbO + 2CH3COOH → Pb(CH3COO)2↓ + H2O;

[0041] The reaction equation is:

[0042] 2Pb + O2 → 2PbO

[0043] PbO + 2NaOH → Na2PbO2↓ + H2O.

[0044] In use, the prepared absorbent is added into the shell 1 of the waste gas treatment device through the absorbent feeding port 2, the lead-containing waste gas is introduced into the waste gas inlet branch pipe 802 from the waste gas inlet main pipe 801, and then is sprayed into the adsorbent in the shell 1 from the air injection holes 803 of the waste gas inlet branch pipe 802, a large number of bubbles are uniformly generated, a large gas-liquid contact area is generated by the large number of bubbles, the gas-liquid contact capacity is enhanced by the continuous generation and rupture of the bubbles, new contact areas are continuously generated, the waste gas treatment device becomes a very efficient multi-stage gas-liquid contactor, the lead and its compounds in the waste gas are dissolved in the liquid film on the surface of the bubbles and fully react with the adsorbent in the liquid film, and the insoluble solid particles in the waste gas are also removed after contacting the liquid film, so that the lead removal efficiency is high and the effect is good.

[0045] In one or more specific embodiments of the present application, a liquid level meter 6 is further installed on the shell 1 for detecting the liquid level of the absorbent solvent in the shell 1, the upper part of the liquid level meter 6 is connected with the shell 1 through a liquid level meter upper interface 601, and the lower part of the liquid level meter 6 is connected with the shell 1 through a liquid level meter lower interface 602. The amount of the absorbent solution in the shell 1 can be monitored through the liquid level meter 6. Initially, the prepared absorbent solution is added into the waste gas treatment device through the absorbent feeding port 2, and the liquid addition is stopped after the liquid level reaches the high liquid level shown in Figure 1 Since a small amount of absorbent droplets is carried out by the waste gas, the amount of the absorbent in the waste gas treatment device is continuously reduced, and the fresh absorbent solution is supplemented into the shell 1 after the liquid level is lower than the low liquid level shown in Figure 1 The liquid addition is stopped after the liquid level reaches the high liquid level shown in Figure 1 Therefore, the amount of the internal liquid can be observed by the staff through the liquid level meter 6 and the supplement is added in time.

[0046] In one or more specific embodiments of this utility model, the length of the exhaust gas inlet branch pipe 802 near the central axis of the housing 1 is greater than the length of the exhaust gas inlet branch pipe 802 away from the central axis of the housing 1, such as... Figure 2 As shown, multiple exhaust gas inlet branch pipes 802 are symmetrically arranged on both sides of the exhaust gas inlet main pipe 801. The exhaust gas inlet branch pipe 802 closest to the central axis of the housing 1 is the longest, while the exhaust gas inlet branch pipe 802 on the central axis of the housing 1 is the shortest. This arrangement allows the exhaust gas inlet branch pipes 802 to be evenly distributed within the housing 1, thereby ensuring that the jet holes 803 on them are evenly distributed, improving the uniformity of gas-liquid contact, and enhancing the lead removal effect of the absorbent.

[0047] Preferably, the ratio of the flow area of ​​the exhaust gas inlet manifold 801 to the total flow area of ​​the exhaust gas inlet branch pipes 802 is between 0.8 and 1.2. By optimizing the ratio of the flow areas of the exhaust gas inlet manifold 801 and the exhaust gas inlet branch pipes 802, it can be ensured that the sprayed exhaust gas and the absorbent are in full contact.

[0048] Preferably, the jet orifice 803 is a circular orifice, and the diameter of the jet orifice 803 is between 2 mm and 10 mm. By optimizing the diameter of the jet orifice 803, it can be ensured that the ejected exhaust gas and the absorbent are in full contact.

[0049] In one or more specific embodiments of this utility model, a wire mesh demister 5 is further provided at the top of the housing 1. By providing the wire mesh demister 5, the treated exhaust gas can pass through the wire mesh demister 5 to remove the carried liquid droplets, thereby minimizing the amount of liquid entrained in the exhaust gas.

[0050] In one or more specific embodiments of this utility model, the top of the housing 1 is provided with an absorbent inlet 2 and a fresh liquid inlet 3. Fresh absorbent solution is periodically replenished into the housing 1 through the fresh liquid inlet 3, so that the concentration of absorbent solution in the housing is maintained within an effective range, thereby achieving a good removal effect on lead in the waste gas.

[0051] The bottom of the shell 1 is provided with a waste residue and waste liquid discharge outlet 7. By providing the waste residue and waste liquid discharge outlet 7, the waste residue and waste liquid generated by the reaction and absorption in the waste gas treatment device can be discharged periodically.

[0052] Finally, it should be noted that: the above specific examples only to the purpose of the present application, technical scheme and beneficial effects are described in detail, should be understood that the above only for the specific embodiments of the present application has, and is not used to limit the scope of the present application; although the present application is described in detail with reference to the foregoing specific examples, those skilled in the art should be understood: it still can be modified to the technical scheme recorded in the foregoing examples, or part or all of the technical features of the equivalent replacement, improvement, etc.; and these modifications, equivalent replacement, improvement, and do not make the essence of the corresponding technical scheme out of the scope of the embodiments of the present application technical scheme, it should be covered in the scope of the claims and description of the present application.

Claims

1. A bubbling lead-containing exhaust gas treatment device, characterized by, The application relates to a waste gas absorption device, which comprises a shell (1), a waste gas inlet assembly (8) arranged at the lower part of the shell (1), an absorbent solution contained in the shell (1), a waste gas outlet (4) arranged at the top of the shell (1), and a liquid level meter (6) arranged on the shell (1). The waste gas inlet assembly (8) comprises a waste gas inlet main pipe (801) and waste gas inlet branch pipes (802) which are communicated with each other, a plurality of the waste gas inlet branch pipes (802) are symmetrically arranged on both sides of the waste gas inlet main pipe (801), and a plurality of jet holes (803) are formed in the waste gas inlet branch pipes (802).

2. A bubbling lead-containing exhaust gas treatment device according to claim 1, characterized by The liquid level meter (6) is arranged on the shell (1) and used for detecting the liquid level of the absorbent solution in the shell (1).

3. A bubbling lead-containing exhaust gas treatment device according to claim 2, characterized in that, The upper part of the liquid level meter (6) is connected with the shell (1) through a liquid level meter upper part connector (601), and the lower part of the liquid level meter (6) is connected with the shell (1) through a liquid level meter lower part connector (602).

4. A bubbling lead-containing exhaust gas treatment device according to claim 1, characterized by The length of the waste gas inlet branch pipe (802) close to the central axis of the shell (1) is greater than the length of the waste gas inlet branch pipe (802) far away from the central axis of the shell (1).

5. A bubbling lead-containing exhaust gas treatment device according to claim 1, characterized by The ratio of the flow area of the waste gas inlet main pipe (801) to the total flow area of the waste gas inlet branch pipes (802) is 0.8-1.

2.

6. A bubbling lead-containing exhaust gas treatment device according to claim 1, characterized by The jet hole (803) is a circular hole.

7. A bubbling lead-containing exhaust treatment device according to claim 6, wherein The diameter of the jet hole (803) is 2-10 mm.

8. A bubbling lead-containing exhaust treatment device according to claim 1, wherein A wire mesh demister (5) is arranged at the top of the shell (1).

9. A bubbling lead-containing exhaust gas treatment device according to claim 1, characterized by An absorbent feeding port (2) is arranged at the top of the shell (1), and a fresh liquid feeding port (3) is arranged at the top of the shell (1).

10. A bubbling lead-containing exhaust gas treatment device according to claim 1, characterized by A waste residue and liquid discharging port (7) is arranged at the bottom of the shell (1).

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